Emerson Liebert Ds Precision Cooling System 28 105Kw Technical Specifications

: Emerson Emerson-Liebert-Ds-Precision-Cooling-System-28-105Kw-Technical-Specifications-680436 emerson-liebert-ds-precision-cooling-system-28-105kw-technical-specifications-680436 emerson pdf

Open the PDF directly: View PDF .
Page Count: 176

Download
Open PDF In Browser	View PDF

Liebert® DS™ Thermal Management Unit
System Design Manual - 28-105kW (8-30 Tons), Downflow/Upflow, 60Hz
Floor Mounted, Air-Cooled, Water/Glycol-Cooled, GLYCOOL Economizer Coil, Dual-Cool DX with
Secondary Chilled Water Coil

TABLE OF CONTENTS
LIEBERT DS MODEL NUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
1.0

COOLING CONFIGURATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2.0

BLOWER CONFIGURATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3

3.0

AIR-COOLED SYSTEMS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6

3.1

Capacity and Physical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

3.2

Standard Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.3

Optional Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.4

Optional Low-Voltage Terminal Package Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

3.5

Dimensions—Liebert DS 028-042, Downflow, Air-Cooled Models . . . . . . . . . . . . . . . . . . . . 16

3.6

Dimensions—Liebert DS 053-077, Downflow, Air-Cooled Models . . . . . . . . . . . . . . . . . . . . 23

3.7

Dimensions—Liebert DS 105, Downflow, Air-Cooled Models . . . . . . . . . . . . . . . . . . . . . . . . 32

3.8

Dimensions—Liebert DS 028-042, Upflow, Air-Cooled Models . . . . . . . . . . . . . . . . . . . . . . . 38

3.9

Dimensions—Liebert DS 053-077, Upflow, Air-Cooled Models . . . . . . . . . . . . . . . . . . . . . . . 45

3.10

Dimensions—Liebert DS 105, Upflow, Air-Cooled Models . . . . . . . . . . . . . . . . . . . . . . . . . . 52

3.11

Heat Rejection—Liebert MC, Fin/Tube and Piggyback Condensers . . . . . . . . . . . . . . . . . . . 57
3.11.1 Liebert MC Microchannel Condensers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

3.12

Piping—Liebert MC™ Condensers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
3.12.1 Fin/Tube Condensers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
3.12.2 Piggyback Condensers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78

3.13

Ancillary Items—Air-Cooled Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84

4.0

WATER-COOLED, GLYCOL-COOLED AND GLYCOOL SYSTEMS . . . . . . . . . . . . . . . . . . . . .91

4.1

Capacity and Physical Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91

4.2

Standard Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105

4.3

Optional Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

4.4

Optional Low-Voltage Terminal Package Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106

4.5

Dimensions—Liebert DS 028-042, Downflow, Water/Glycol/GLYCOOL Models . . . . . . . . 107

4.6

Dimensions—Liebert DS 053-077, Downflow, Water/Glycol/GLYCOOL Models . . . . . . . . 111

4.7

Dimensions—Liebert DS 105, Downflow, Water/Glycol/GLYCOOL-Cooled Models . . . . . 116

4.8

Dimensions—Liebert DS 028-042, Upflow, Water/Glycol/GLYCOOL-Cooled Models . . . . 121

4.9

Dimensions—Liebert DS 053-077, Upflow, Water/Glycol/GLYCOOL-Cooled Models . . . . 125

4.10

Dimensions—Liebert DS 105, Upflow, Water/Glycol/GLYCOOL Models. . . . . . . . . . . . . . 129

4.11

Heat Rejection—Drycoolers and Pumps . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 133
4.11.1
4.11.2
4.11.3
4.11.4
4.11.5
4.11.6
4.11.7
4.11.8
4.11.9

4.12

Drycooler Selection—Prop Fan Drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dimensions—Prop Fan Drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Data—Prop Fan Drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Piping—Prop Fan Drycoolers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pump Packages & Expansion Tank. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Drycooler Selection—Indoor Piggyback Drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Weights and Dimensions—Indoor Piggyback Drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . .
Electrical Data—Piggyback Drycoolers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Piping—Piggyback Drycoolers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

133
133
136
138
143
147
147
148
150

Ancillary Items—Water-Cooled Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 152
i

5.0

GUIDE SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157
1.0

GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

2.0

PRODUCT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 157

3.0

EXECUTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 169

ii

Liebert DS Model Number

LIEBERT DS MODEL NUMBER
1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

D

S

0

3

5

A

U

A

0

E

I

*

*

*

*

Air Distribution
DS = Downflow Standard
VS = Upflow Standard
Factory Configuration
Number

Nominal kW
028, 035, 042, 053, 070, 077, 105
(8, 10, 12, 15, 20, 22, 30 tons)

Humidification
0 - None
I - Infrared
S - Steam Generating
Canister

Cooling Type
A = Air-Cooled
D = Dual-Cooling, Air-Cooled
W = Water/Glycol
K = GLYCOOL (Liebert Economizer Coil)
H = Dual-Cooling, Water-Cooled

Reheat Type
0 - None
E - 3-Stage Electric
S - SCR

Compressor
U - Semi-Hermetic with Four-Step, R-407C
S - Scroll, R-407C
D - Digital Scroll, R-407C

Fan Type
0 = Centrifugal Fans
1 = Electronically
Commutated (EC)
Fans

Voltage
A - 460/3/60
B - 575/3/60
C - 208/3/60
D - 230/3/60
2 - 380/3/60

Not all combinations of options are available on all units.
Digital Scroll Compressors
• Not available on 077 and 105 models
• Not compatible with SCR reheat because digital scroll provides variable capacity control
EC Fans, Direct-Drive
• Not available on upflow (VS) configuration
• Liebert Econ-O-Coil™ not available on 028, 035, 042 models with 208/230V
Steam Generating Canister Humidifier
• Not available on upflow (VS) configurations
• Not available on EC fan configurations
575 Volt Option Limitations
• Digital scroll compressors available only on 053, 070 models
GLYCOOL Liebert Economizer Models
• 105 model requires semi-hermetic compressors only, so as to prevent potential coil freezing
Turning Vanes
• Not available on floor stands 6" (152.4mm) tall
• Not available or required on units with EC fans

1

Liebert® DS™

Cooling Configurations

1.0

COOLING CONFIGURATIONS
NOTE
All field-installed piping must comply with applicable local, state and federal codes.

AIR-COOLED
Air-cooled unit piping is spun closed from the
factory and contains a nitrogen holding charge.
Each installation requires field-supplied
refrigerant and piping to a condenser.

GLYCOL-COOLED
Glycol-cooled units are factory-charged and
tested. Field-supplied and field-installed piping is
required from the unit to the drycooler and pump
package.

GLYCOOL-INTEGRATED FLUID ECONOMIZER
GLYCOOL units are factory-charged and tested. Field-supplied
and field-installed piping is required from the unit to the
drycooler and pump package. An additional Liebert Economizer
coil is included for use when fluid temperatures are sufficiently
low (below room temperature). Economizer cooling is provided
by circulating cold glycol through this second coil, reducing or
eliminating compressor operation.

WATER-COOLED
Water-cooled units are factory-charged and
tested. Field-supplied and field-installed
water piping is required from the unit to the
cooling tower.

DUAL-COOL
This system has all of the features of a compressorized
system, but adds a second cooling coil that is connected
to a source of chilled water. Cooling is provided by
circulating chilled water, when available, through this
second coil and reducing compressor operation.

Liebert® DS™

2

Blower Configurations

2.0

BLOWER CONFIGURATIONS

Figure 1

Blower configurations—Downflow, front and rear supply models, EC fans
Return Air

Return Air

Filter

Filter

Front

Front

Coil

Coil

Blower

Supply
Air

Raised
Floor

Blower
Raised
Floor

Rear Supply, EC Fans
Applicable to installations
without raised floors

Front Supply, EC Fans
Applicable to installations
without raised floors

Figure 2

Supply
Air

Blower configurations—Downflow, bottom supply and under-floor supply models, EC fans

Return Air

Return Air
Filter

Filter

Front

Front

Coil

Coil

Blower
Blower

Raised
Floor

Raised
Floor

Supply Air

Floor
Stand
(optional)

Supply
Air

Floor Stand
(optional )
Supply
Air

Under-Floor Supply, EC Fans

Bottom Supply, EC Fans

3

Liebert® DS™

Blower Configurations

Figure 3

Blower configurations—Downflow, front and rear supply models, centrifugal fans
Return Air

Return Air

Filter

Filter

Front

Front

Coil

Coil

Raised
Floor

Supply Air
Turning Vane
(optional )

Blower

Raised
Floor

Floor
Stand
(optional)

Supply Air
Turning Vane
(optional )

Front Supply, Forward-Curved Fans

Liebert® DS™

Blower

Rear Supply, Forward-Curved Fans

4

Floor
Stand
(optional)

Blower Configurations

Figure 4

Blower configurations—Upflow, front return models, centrifugal fans
Supply Air

Supply Air

Blower

Front

Blower

Front

Coil

Coil

Filter

Filter

Return
Air

Return
Air

Top Supply, Front Throw Forward-Curved Fans

Figure 5

Top Supply, Rear Throw Forward-Curved Fans

Blower configurations—Upflow, rear return models, centrifugal fans
Supply Air

Front

Supply Air

Blower

Front

Coil

Blower

Coil

Filter

Filter

Return
Air

Return
Air

Ductwork

Top Supply, Front Throw, Forward-Curved Fans

Ductwork

Top Supply, Rear Throw, Forward-Curved Fans

5

Liebert® DS™

Air-Cooled Systems

3.0

AIR-COOLED SYSTEMS

3.1

CAPACITY AND PHYSICAL DATA

Table 1

Performance Data—Air-cooled, EC fan, under-floor discharge

Model Size

028

035

042

053

070

077

105

CAPACITY DATA with EC Fans
Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor
Semi Hermetic Compressors with EC Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH) 34.1 (116.4)
Sensible kW
(kBTUH)

34 (116)

42.1 (143.6)

47.9 (163.6)

61.7 (210.6)

72.4 (247.1)

79.2 (270.3)

103.3 (352.5)

41.4 (141.2)

47.9 (160.9)

61.6 (210.2)

72 (245.9)

78.9 (269.2)

98.9 (337.5)

80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 32.4 (110.5)
Sensible kW
(kBTUH)

31 (105.9)

40.1 (136.8)

45.7 (156.1)

58.3 (198.9)

68.8 (234.8)

75.3 (257.1)

99.1 (338.2)

37.5 (128.1)

45.7 (146.2)

56.8 (193.9)

66.4 (226.6)

72.9 (248.8)

90 (307.2)

75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45.1% RH
Total kW (kBTUH) 30.9 (105.3)
Sensible kW
(kBTUH)

27.5 (93.9)

38.3 (130.8)

43.8 (149.5)

55.4 (189)

65.6 (223.9)

72 (245.8)

95.2 (325)

33.3 (113.8)

43.8 (129.9)

50.8 (173.3)

59 (201.3)

64.9 (221.5)

80 (273.1)

72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH)

30 (102.5)

37.3 (127.4)

42.7 (145.8)

53.8 (183.6)

63.9 (218)

70.2 (239.7)

93.1 (317.6)

Sensible kW
(kBTUH)

25.3 (86.3)

30.7 (104.8)

42.7 (119.7)

46.7 (159.3)

54.2 (184.9)

59.7 (203.6)

73.8 (251.8)

Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor
Scroll Compressors Only

Scroll or Digital Scroll Compressors with EC Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH) 35.4 (120.8)
Sensible kW
(kBTUH)

35.2 (120)

40.2 (137.1)

45.5 (155.3)

63.5 (216.8)

75.8 (258.6)

81.3 (277.6)

103.6 (353.7)

40 (136.4)

45.3 (154.7)

63.2 (215.7)

74.9 (255.6)

80.6 (275.1)

99.1 (338.3)

80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 33.4 (113.9)

38.2 (130.4)

43.4 (148.1)

60.5 (206.5)

72.7 (248)

77.9 (265.8)

99.7 (340.2)

Sensible kW
31.8 (108.7)
(kBTUH)

36.5 (124.6)

41.6 (141.9)

58.3 (199.1)

68.9 (235)

74.1 (253)

90.3 (308.2)

75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45.1% RH
Total kW (kBTUH) 31.6 (107.8)
Sensible kW
(kBTUH)

28.2 (96.1)

36.5 (124.7)

41.6 (141.9)

57.8 (197.4)

69.9 (238.4)

74.9 (255.5)

96 (327.8)

32.5 (110.8)

37 (126.3)

52 (177.6)

61.4 (209.4)

65.9 (224.9)

80.4 (274.3)

72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH) 30.6 (104.3)
Sensible kW
(kBTUH)

25.8 (88.2)

35.6 (121.5)

40.6 (138.5)

56.4 (192.6)

68.3 (233)

73.2 (249.9)

93.8 (320.3)

29.9 (102.1)

34.1 (116.3)

47.9 (163.6)

56.5 (192.9)

60.6 (206.9)

74.1 (253)

FAN SECTION - Downflow Models - EC Fans Under Floor
Standard Air
Volume,
CFM (CMH)
0.2" External Static

4,400
(7,476)

5,200
(8,835)

6200
(10533.9)

8,000
(13,592)

9,600
(16,310)

11,000
(18,689)

13,700
(23,276)

Standard Fan
Motor,
Nominal kW
(total for all fans)

2.8

2.8

2.8

2.5

4.0

5.9

7.8

Number of Fans

1

1

1

2

2

2

3

1. Capacity data is rated and factory-certified per ASHRAE 127-2012 with a 5% tolerance.
2. Some options or combinations of options may result in reduced air flow—consult factory for recommendations.
3. Digital scroll not available on 077 and 105 models; units available with semi-hermetic and standard scroll compressors only.

Liebert® DS™

6

Air-Cooled Systems

Table 2

Performance data—Air-cooled, centrifugal fan

Model Size

028

035

042

053

070

077

105

CAPACITY DATA with Centrifugal Fans
Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor
Semi Hermetic Compressors with Centrifugal Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH) 40.3 (137.6) 41.0 (140.0)

46.2 (157.6)

60.2 (205.3)

70.5 (240.6)

76.9 (262.6)

101.3 (345.6)

Sensible kW 38.0 (129.6) 40.3 (137.6)
(kBTUH)

45.5 (155.3)

59.7 (203.8)

69.7 (237.9)

76.2 (259.9)

96.6 (329.6)

80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 38.6 (131.8) 39.1 (133.3)
Sensible kW 34.3 (117.2) 36.5 (124.6)
(kBTUH)

43.9 (150)

57.2 (195.1)

67.2 (229.3)

73.4 (250.6)

97.1 (331.5)

41.2 (140.5)

54.8 (187.1)

63.8 (217.7)

69.8 (238.2)

87.7 (299.4)

75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45.1% RH
Total kW (kBTUH) 37.1 (126.5) 37.3 (127.2)
Sensible kW 30.5 (104.2) 32.3 (110.3)
(kBTUH)

42 (143.3)

54.4 (185.6)

64.1 (218.9)

70.2 (239.7)

93.3 (318.4)

36.4 (124.2)

48.7 (166.2)

56.5 (192.9)

61.8 (210.9)

77.8 (265.4)

72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH) 36.1 (123.3) 36.3 (123.8)
Sensible kW 28.2 (96.3)
(kBTUH)

29.7 (101.3)

40.9 (139.6)

52.9 (180.6)

62.5 (213.2)

68.6 (234)

91.0 (310.6)

33.4 (113.9)

44.7 (152.7)

51.9 (177.2)

56.7 (193.6)

71.5 (244.1)

Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor
Scroll Compressors Only

Scroll or Digital Scroll Compressors with Centrifugal Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH) 34.1 (116.4) 39.7 (135.5)

43.7 (149.2)

62.1 (212.1)

74.0 (252.6)

79.1 (270.1)

101.6 (346.9)

Sensible kW 40.1 (136.9) 34.0 (116.0)
(kBTUH)

43.6 (148.9)

61.3 (209.3)

72.3 (246.6)

77.8 (265.6)

96.8 (330.4)

80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 32.4 (110.5) 38.3 (130.8)

41.6 (141.9)

59.3 (202.5)

71.2 (243)

75.9 (259)

97.7 (333.5)

Sensible kW 31.0 (105.9) 36.1 (123.2)
(kBTUH)

39.9 (136.1)

56.1 (191.6)

65.9 (225)

71.1 (242.6)

88.0 (300.4)

75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45.1% RH
Total kW (kBTUH) 30.9 (105.3) 36.7 (125.4)
Sensible kW 27.5 (93.9)
(kBTUH)

32.1 (109.4)

39.8 (135.7)

56.9 (194.2)

68.5 (233.9)

73 (249.3)

94.1 (321.1)

35.3 (120.6)

49.9 (170.4)

58.6 (200.1)

63.1 (215.2)

78.1 (266.6)

72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH) 30.0 (102.5) 35.9 (122.4)
Sensible kW 25.3 (86.3)
(kBTUH)

29.5 (100.6)

38.8 (132.3)

55.5 (189.5)

67 (228.7)

71.4 (243.7)

91.9 (313.7)

32.4 (110.5)

46.0 (157)

54.0 (184.3)

58.0 (197.8)

71.9 (245.5)

FAN SECTION - Downflow Models - Fixed Pitch, Two Belts
Standard Air
Volume - CFM
(CMH) 0.2"
external static

4,400
(7,476)

5,200
(8,835)

6,300
(10,704)

7,500
(12,743)

9,000
(15,291)

10,400
(17,670)

13,700
(23,276)

Standard Fan
Motor hp (kW)

2 (1.5)

3 (2.2)

5.0 (3.7)

3 (2.2)

5 (3.7)

7.5 (5.6)

10.0 (7.5)

1

1

1

2

2

2

3

Number of Fans

1. Capacity data is rated and factory-certified per ASHRAE 127-2012 with a 5% tolerance.
2. Some options or combinations of options may result in reduced air flow—consult factory for recommendations.
3. Digital scroll not available on 077 and 105 models; units available with semi-hermetic and standard scroll compressors only

7

Liebert® DS™

Air-Cooled Systems

Table 3

Physical data—Air-cooled systems
Model Size

028

035

042

053

070

077

105

EVAPORATOR COIL- A-Frame - Copper Tube/Aluminum Fin
Face Area, sq. ft. (sq. m)
Rows of Coil

17.1 (1.6)

17.1 (1.6)

17.1 (1.6)

24.7 (2.3)

24.7 (2.3)

24.7 (2.3)

32.3 (3.0)

3

3

3

3

3

3

3

REHEAT SECTION
Electric Reheat - Three-Stage, Stainless Steel Fin Tubular, capacity does not include fan motor heat
Capacity - kW (kBTUH) - Standard
Selection 15.0 (51.2)

15.0 (51.2)

15.0 (51.2)

25.0 (85.3)

25.0 (85.3)

25.0 (85.3)

30.0 (102.4)

Capacity, kW (kBTUH) - Optional 10.0 (34.1)
Selection

10.0 (34.1)

10.0 (34.1)

15.0 (51.2)

15.0 (51.2)

15.0 (51.2)

20.0 (68.3)

25.0 (85.3)

25.0 (85.3)

30.0 (102.4)

22.0 (10.0)

22.0 (10.0)

Electric Reheat - SCR Control, Stainless Steel Fin Tubular (optional selection)
Capacity, kW (kBTUH) 15.0 (51.2)

15.0 (51.2)

15.0 (51.2)

25.0 (85.3)

HUMIDIFIER SECTION
Infrared Humidifier (Steam canister humidifiers available on downflow models with centrifugal fans)
Capacity, lb./hr. (kg/h)

11.0 (5.0)

11.0 (5.0)

11.0 (5.0)

22.0 (10.0)

22.0 (10.0)

FILTER SECTION - Disposable Type - Nominal Sizes and Quantities, Standard MERV 8 or Optional MERV 11
(filter types cannot be mixed, must be all MERV 8 or all MERV 11)
Downflow Models
Quantity

3

@ 25x20
Nominal Size, inches 2
1 @ 25x16

3

3

4

4

4

4

2 @ 25x20
1 @ 25x16

2 @ 25x20
1 @ 25x16

4 @ 25x20

4 @ 25x20

4 @ 25x20

4 @ 25x20

Upflow Models (Front & Rear return) Filters located in separate filter box on rear return, located on lower unit panel
Quantity
Nominal Size, inches

4

4

4

6

6

6

8

25x20

25x20

25x20

25x20

25x20

25x20

25x20

PIPING CONNECTION SIZES - Air-cooled Liebert DS Indoor Unit (Not External Line Sizes)
Liquid Line, O.D. Copper (2/unit)

1/2

1/2

1/2

5/8

5/8

5/8

5/8

Hot Gas Line, O.D. Copper (2/unit)

5/8

5/8

5/8

7/8

7/8

7/8

1-1/8

Infrared Humidifier, O.D. Copper

1/4

1/4

1/4

1/4

1/4

1/4

1/4

Condensate Drain, FPT

3/4

3/4

3/4

3/4

3/4

3/4

3/4

Condensate Drain w/Optional
Condensate Pump, OD

1/2

1/2

1/2

1/2

1/2

1/2

1/2

OUTDOOR AIR-COOLED CONDENSER, STANDARD 95°F AMBIENT SELECTION; see Tables 44 and 49 for other selections
Model (R-407C refrigerant) MCM080_8 MCM080_8 MCM080_8 MCM080_8
Number of Fans

2

2

2

2

MCM080_8

MCM080_8

MCL110_8

2

2

2

DUAL-COOL UNITS DATA, Water (0% Glycol), Net Capacity Data kW (kBTUH)

CAUTION: CuNi coil option must be specified when Econ-O-Coil is applied to open water tower.
75°F DB, 61.1 WB (23.9°C DB, 16.2°C WB) 45% RH, 45°F EWT, 55°F LWT Based on Centrifugal Fans
Total Capacity, kW (kBTUH)

26.2 (89.2) 29.8 (101.6) 32.2 (109.8) 49.9 (170.4) 55.3 (188.8) 57.7 (196.8) 75.8 (258.8)

Sensible Capacity, kW (kBTUH)

24.9 (85)

28.8 (98.2) 31.6 (107.8)

46 (157.1)

Flow Rate GPM (I/m) @ 10°F Rise

19 (71.9)

22.4 (84.8)

36.4 (138)

Pressure Drop, ft. (kPa), valve, coil 6.1 (18.23)

73 (249.1)

41.7 (158)

46 (174)

59.4 (225)

8.3 (24.81) 10.50 (31.39) 10.40 (31.09)

13.3 (39.8)

15.9 (47.6)

15.9 (47.5)

6600
(11213)

8000
(13592)

9600
(16310)

11000
(18689)

13,700
(23,256)

8 (30.4)

8 (30.4)

8 (30.4)

10 (38.0)

Airflow, CFM (CMH) 4400 (7475) 5500 (9344)

25.5 (96.5)

51.7 (176.4) 54.3 (185.4)

Fluid Volumes
Econ-O-Coil fluid volume, gal (l)

5 (19.0)

5 (19.0)

5 (19.0)

Capacity data is rated per ASHRAE 127-2012 with a 5% tolerance

Liebert® DS™

8

Air-Cooled Systems

Table 4

Model
#

Reheat
Options

Electric
Standard, kW

None

Electric
Standard kW

None

Electric,
Downsized kW

Electric,
Downsized kW

Humidifier
Options

Infrared

Infrared

None

None

Humidifier

No Humidifier

230 460 575 208

230 460 575 208

Volts
FLA

DS028

DS035

80

40

30

70

70

35

30

82
80

78.9 39.2 30.5 47.3
80

40

30

60

FLA

70.7 68.2 33.4 25.5 63.1 60.9 29.5 25.2 70.7 68.2 33.4 25.5 49.8
86.3 83.2 40.8 31.9 68.3 66.1
90

90

45

30

80

80

43

78.2 75.9 37.7 33

78.1 75.9 37.7 33

95.7 92.5

46

36

85.2

83

110

50

45

110

110

78.2 75.7 37.5 29.4 64.8

41.2 35.8 95.7 92.5
50

45

30

110

110

46

36

71.9

50

40

100

30

25

70

70

35

30

70

49.8 23.7 17.8 63.1 60.9 29.5 25.2 56.9

70

45

460 575

62.8 31.1 24.1

60

70

90

230

47.3 23.3 18.5 64.8 62.8 31.1 25.9 64.8

40

90

208

51.9 25.6 19.9

55

30

230 460 575

21.1 16.8 56.3 54.1 26.9 24.2 53.5

55

FLA

110

230 460 575 208

32 27.1 86.3 83.2 40.8 31.1

WSA

26.2 19.7
35

25

69

67

80

80

32.7 27.1
40

30

64.8 31.9 25.6 78.1 75.9 37.7 33
71.9 35.4 28.4 85.2

83

100

110

45

70

35

25

55.3 26.9 20.4

69

67

80

80

32.7 24.8
35

25

64.8

64.8 31.9 25.6

41.2 35.8 78.4

76.4 37.8 29.6

45

100

100

82.6 40.8 30.4 109.2 104.8 52.4 42

92.1

89.6 44.1 33.5

35

110

50

45

35

FLA

119.9 116 57.1 43.5 109.2 104.8 52.4 42 119.9 116 57.1 43.5 82.6

WSA

145.3 140.4 69.4 53.9 117.2 112.8 56.5 45 145.3 140.4 69.4 52.8 90.6 90.62 44.9 33.4 117.2 112.8 56.5 45 110.52 107.4 53.1 40.3
150

150

70

50

125

125

70

50

150

150

70

50

110

110

60

45

125

125

70

50

125

125

60

45

FLA

129.2 125.3 59.9 46.4 127.8 123.4 58 46.4 129.2 125.3 59.9 45.7 101.2 101.2 46.4 34.8 127.8 123.4 58 46.4 101.4 101.2 46.9 35.7

WSA

156.9 152 72.9 55.5 138.2 133.8 62.8 50 156.9 152.0 72.9 55.5 111.6 111.6 51.2 38.4 138.2 133.8 62.8 50 122.15 119.02 56.6 43
175

175

80

60

175

175

80

139.2 134.8 61.4 50 139.2 134.8 61

60

80

60

50 134.9 131 61.4 47.5 112.6 112.6 49.4 38.4 139.2 134.8 61

175

175

80

60

150

150

70

50

50

175

175

150

150

70

50

112.6 112.6 49.4 38.4

WSA

164 159.2 74.8 57.8 151. 146.6 66.2 54 164.0 159.2 74.8 57.8 124.37 124.4 54.6 42.4 151 146.6 66.2 54 129.27 126.15 58.5 45.3

OPD

175

175

80

70

175

175

80

70

175

175

80

60

150

150

70

50

175

175

80

70

150

150

70

50

FLA

171.5 167.1 83.7 69.1 171.5 167.1 83.7 69.1 164 163.5 79.8 62.6 144.9 144.9 72.1 57.5 171.5 167.1 83.7 69.1 144.9 144.9 72.1 57.5

WSA

198.8 198.2 97.4 76.4 186.5 182.1 91.6 75.4 198.8 198.2 97.4 76.4 159.9 159.9 80 63.8 186.5 182.1 91.6 75.4 169.3 165.5 81.3 63.9

OPD
1.
2.
3.
4.
5.
6.

78.9 39.2 31.9 60.6 58.4 29.1 25.9

WSA

FLA

DS105

43

80

OPD

DS077

208

82

OPD

DS070

208

OPD

OPD

DS053

230 460 575

67.3 64.8 32.1 25.5 56.3 54.1 26.9 24.2 67.3 64.8 32.1 25

WSA

OPD

DS042

Electrical data—Air-cooled systems with EC fans

225

225 110 100 225

225 110 100 225

225 110 90

200

200 110 80

225

225 110 100

200

200

110 80

Reduced reheat for 028, 035, and 042 models is 10kW.
Reduced reheat for 053, 070, and 077 models is 15kW.
Consult local representative for SCR reheat values.
Reduced reheat for 105 kW models is 20kW.
SCCR - Short Circuit Current Rating 65,000 amps rms symmetrical maximum.
Steam canister humidifiers not available on models with EC fans.

9

Liebert® DS™

Air-Cooled Systems

Table 5

Electrical data—Air-cooled systems with centrifugal fans

Reheat Options

Electric, Std. kW

None

Electric, Std. kW

None

Humidifier
Options

Infrared or Steam
Generating Canister

Infrared or Steam
Generating Canister

None

None

Model
028

028

035

035

042

042

Motor
hp Volts
2.0

3.0

3.0t

5.0

5.0

7.5

208

230

460

208

230

460

070

5.0

5.0

230

460

575

208

230

460 575

66.4

63.2

31.8 25.2 55.4

52.5

26.6 23.9 66.4

63.2

31.8 24.7 42.1

41.4 20.8 16.5

81.1

77.3

38.9 31.5 59.7

56.8

28.8 25.6 81.1

77.3

38.9 30.2 46.4

45.7

23

18.2

OPD

80

80

60

30

25

40

30

70

70

35

30

80

80

40

30

60

FLA

69.5

66.0

33.2 26.4 58.5

55.3

28.0 25.1 69.5

66.0

33.2 25.9 45.2

44.2 22.2 17.7

WSA

84.2

80.1

40.3

33

62.8

59.6

30.2 26.8 84.2

80.1

40.3 31.4 49.5

48.5 24.4 19.4

OPD

90

80

40

30

80

70

FLA

72.9

69.4

34.5 26.4 65.3

62.1

30.6 26.1 72.9

69.4

34.5 26.4 52.0

51.0 24.8 18.7

WSA

88.5

84.4

41.9 33.0 70.5

67.3

33.1 28.0 88.5

84.4

41.9 32.0 57.2

56.2 27.3 20.6

OPD

90

90

FLA

79.0

75.0

37.3 28.6 71.4

67.7

33.4 28.3 79.0

75.0

37.3 28.6 58.1

56.6 27.6 20.9

WSA

94.6

90.0

44.7 35.8 76.6

72.9

35.9 30.2 94.6

90.0

44.7 34.2 63.3

61.8 30.1 22.8

OPD

100

100

FLA

86.5

82.7

41.6 36.1 86.4

WSA

104

99.3

49.9 39.1 93.5

OPD

110

110

FLA

94.0

89.5

45

45

50

35

35

50

90

90

125

110

40

90

35

90

80

90

40

45

35

70

70

35

25

89.8

45.1 38.9 104.0 99.3

49.9 39.1 80.2

78.7 39.3 31.5

45.0 39.0 93.9

89.5

41

101.4

96

50

40

78.4 39.2 31.6

48.5 41.8 111.5 106.1 53.3 42.0 87.7

85.5 42.7 34.4
110

41

74.8

73.8 37.6 27.9

WSA 137.5 131.6 66.2 50.8 109.4 104.0 53.3 42.5 137.5 131.6 66.2 50.3 82.8

81.8 41.7 30.9

70

110

100

44.8 35.4 80.6
110

125

125

89.3

100

30

45

150

50

45.0 39.0 94.0

45

40

25

71.6 35.8 28.7

50

80

30

41.4 32.5 73.1

110

80

60

82.5

110

35

60

41.6 36.1 86.5
50

45

30

82.7

50

35

90

100

110

45

30

100

110

60

35

80

WSA 111.5 106.1 53.3 42.0 101.0 96.6

OPD
053

208

FLA

FLA 112.1 107.2 53.9
3.0

575

WSA

OPD
053

575

50

125

60

50

125

110

60

49.2 39.5 112.1 107.2 53.9

125

60

50

150

125

70

50

110

110

50

50

45

40

FLA 118.2 112.8 56.7 43.2 107.5 101.6 52.0 41.7 118.2 112.8 56.7 43.2 80.9

79.4 40.4 30.1

WSA 143.6 137.2 69.0 53.5 115.5 109.6 56.1 44.7 143.6 137.2 69.0 52.5 88.9

87.4 44.5 33.1

OPD

110

110

60

45

FLA 127.5 122.1 59.5 46.1 126.1 120.2 57.6 46.1 127.5 122.1 59.5 45.4 99.5

98

46

34.5

150

150

70

50

125

125

70

50

150

150

70

50

WSA 155.2 148.8 72.5 55.2 136.5 130.6 62.4 49.7 155.2 148.8 72.5 55.2 109.9 108.4 50.8 38.1
OPD

175

150

80

60

175

150

80

60

175

150

80

60

150

125

70

50

FLA 135.0 128.9 62.9 49.0 133.6 127.0 61.0 49.0 135.0 128.9 62.9 48.3 107.0 104.8 49.4 37.4
070

077

7.5

7.5

WSA 162.7 155.6 75.9 58.1 144.0 137.4 65.8 52.6 162.7 155.6 75.9 58.1 117.4 115.2 54.2 41.0
OPD

175

FLA

145

175

80

60

175

175

80

60

175

175

80

60

150

150

70

50

138.4 64.4 52.6 145.0 138.4 64.0 52.6 140.7 134.6 64.4 50.1 118.4 116.2 52.4 41.0

WSA 169.8 162.8 77.8 60.4 156.8 150.2 69.2 56.6 169.8 162.8 77.8 60.4 130.2 128.0 57.6 45.0
OPD

200

175

90

70

200

175

80

70

175

175

90

70

175

175

70

60

FLA 151.6 144.4 67.4 54.6 151.6 144.4 67.0 54.6 147.3 140.6 67.4 52.1 125.0 122.2 55.4 43.0
077

10.0

WSA 176.4 168.8 80.8 62.4 163.4 156.2 72.2 58.6 176.4 168.8 80.8 62.4 136.8 134.0 60.6 47.0
OPD

200

200

90

70

200

200

90

70

200

175

90

70

175

FLA 177.4 170.2 88.4 72.6 177.4 170.2 88.4 72.6 169.9 166.6 84.5 66.1 150.8
105

10.0

175
148

80

60

76.8 61.0

WSA 204.7 201.3 102.1 79.9 204.7 201.3 102.1 79.9 204.7 201.3 102.1 79.9 165.8 163.0 84.7 67.3
OPD

250

225

125

100

250

225

125

100

225

225

110

90

225

200

110

90

FLA 192.3 184.2 95.4 78.6 192.3 184.2 95.4 78.6 185.3 180.6 91.5 72.1 166.2 162.0 83.8 67.0
105

15.0

WSA 220.1 215.3 109.1 85.9 220.1 215.3 109.1 85.9 220.1 215.3 109.1 85.9 181.2 177.0 91.7 73.3
OPD

1.
2.
3.
4.
5.

250

250

125

100

250

250

125

100

Reduced reheat for 028, 035, and 042 models is 10kW.
Reduced reheat for 053, 070, and 077 models is 15kW.
Consult local representative for SCR reheat values.
Reduced reheat for 105 kW models is 20kW.
SCCR - Short Circuit Current Rating 65,000 amps rms symmetrical maximum.

Liebert® DS™

10

250

250

125

100

225

225

110

90

Air-Cooled Systems

Table 5

Electrical data—Air-cooled systems with centrifugal fans (continued)
Reheat Options

Electric, Downsized kW

Humidifier Options
Model

028

028

035

035

042

042

053

053

070

070

077

077

105

105
1.
2.
3.
4.
5.

Motor, hp

2.0

3.0

3.0

5.0

5.0

7.5

3.0

5.0

5.0

7.5

7.5

10.0

10.0

15.0

Infrared or Steam Generating Canister

None

Volts

208

230

460

575

208

230

460

575

FLA

55.4

52.5

26.6

23.9

52.6

50.3

25.3

19.6

WSA

63.9

61.2

30.8

25.6

63.9

61.2

30.8

23.8

OPD

70

70

35

30

70

70

35

25

FLA

58.5

55.3

28

25.1

55.7

53.1

26.7

20.8

WSA

67.0

64.0

32.2

26.8

67.0

64.0

32.2

25.0

OPD

80

70

35

30

70

70

35

25

FLA

65.3

62.1

30.6

26.1

59.1

56.5

28.0

21.3

WSA

71.2

68.2

33.8

28.0

71.2

68.2

33.8

25.7

OPD

90

80

40

35

80

80

40

30

FLA

71.4

67.7

33.4

28.3

65.2

62.1

30.8

23.5

WSA

77.3

73.8

36.6

30.2

77.3

73.8

36.6

27.9

OPD

90

90

45

35

90

80

40

30

FLA

86.4

82.7

41.6

36.1

73.1

71.6

35.8

28.7

WSA

93.5

89.8

45.1

38.9

86.7

83.2

41.7

32.7

OPD

110

110

50

50

100

100

50

40

FLA

93.9

89.5

45.0

39.0

80.6

78.4

39.2

31.6

WSA

101.0

96.6

48.5

41.8

94.2

90.0

45.1

35.6

OPD

125

110

60

50

110

110

50

45

FLA

101.4

96.0

49.2

39.5

84.3

80.8

40.9

31

WSA

109.4

104.0

53.3

42.5

102.7

98.6

49.9

37.8

OPD

125

125

60

50

110

110

60

45

FLA

107.5

101.6

52.0

41.7

90.4

86.4

43.7

33.2

WSA

115.5

109.6

56.1

44.7

108.8

104.2

52.7

40.0

OPD

125

125

70

50

125

125

60

45

FLA

126.1

120.2

57.6

46.1

99.7

98

46.5

35.4

WSA

136.5

130.6

62.4

49.7

120.5

115.8

56.2

42.7

OPD

175

150

80

60

150

125

70

50

FLA

133.6

127.0

61.0

49.0

107.2

104.8

49.9

38.3

WSA

144.0

137.4

65.8

52.6

128.0

122.6

59.6

45.6

OPD

175

175

80

60

150

150

70

50

FLA

145

138.4

64.0

52.6

118.4

116.2

52.4

41.0

WSA

156.8

150.2

69.2

56.6

135.1

129.8

61.5

47.9

OPD

200

175

80

70

175

175

70

60

FLA

151.6

144.4

67.0

54.6

125.0

122.2

55.4

43.0

WSA

163.4

156.2

72.2

58.6

141.7

135.8

64.5

49.9

OPD

200

200

90

70

175

175

80

60

FLA

177.4

170.2

88.4

72.6

150.8

148

76.8

61.0

WSA

192.4

185.2

96.3

78.9

175.2

168.6

86.0

67.4

OPD

250

225

125

100

225

200

110

90

FLA

192.8

184.2

95.4

78.6

166.2

162.0

83.8

67.0

WSA

207.8

199.2

103.3

84.9

190.6

182.6

93.0

73.4

OPD

250

250

125

100

225

225

110

90

Reduced reheat for 028, 035, and 042 models is 10kW.
Reduced reheat for 053, 070, and 077 models is 15kW.
Consult local representative for SCR reheat values.
Reduced reheat for 105 kW models is 20kW.
SCCR - Short Circuit Current Rating 65,000 amps rms symmetrical maximum.

11

Liebert® DS™

Air-Cooled Systems

Figure 6

Electrical field connections—Upflow and downflow models, single molded case switch
disconnect with main fuses
See 3.2 - Standard Electrical Connections, 3.3 Optional Electrical Connections and 3.4 - Optional
Low-Voltage Terminal Package Connections for keys
to numbered components.

2

OVERCURRENT PROTECTION DEVICES
15

Liebert
IntelliSlot
Housing

4

A

B

C

D
Alternate
Location

P64

6
60Hz

CONTACTORS

P67

CONTACTORS, RELAYS, &
OVERLOAD PROTECTORS

13

E
5

1
17

18

82 83 88 89

Typical orientation of components shown.
Component location varies by option and unit size

6
9

16

22

DOWNFLOW 3

DOWNFLOW LOW-VOLT SECTION

19

CAUTION
UPFLOW

75 76 94 95 96 97 91 92 93 80 81 11 12

3

B

A
24

23

58 59 84 85

21

7

10

8

Risk of broken or shorted low-voltage
wiring. Field-installed low-voltage wiring
must be routed with loop as shown
to allow electric box to swing.

20

37C 38C 37B 38B 37 38 24 50 51 55 56 70 71 230 72 73

C

D

49-3

49-1

SH

11

12

Item 12 Installation Conditions

E

1. Follow all local installation codes.
2. Do not run CAN cables in same conduit, raceway, or
chase as high voltage wires (120-600V).
3. Separate high-voltage wires from CAN wires by 12" (305mm).
4. For runs greater than 350ft (107m), contact Emerson factory.

Liebert® DS™

12

Point of Hinged Low-Voltage Electric Box

DS UPFLOW LOW VOLT SECTION
DPN000807
Pg. 2, Rev. 8

Air-Cooled Systems

Figure 7

Electrical field connections—Upflow and downflow models, dual fused disconnect switches
See 3.2 - Standard Electrical Connections, 3.3 Optional Electrical Connections and 3.4 - Optional
Low-Voltage Terminal Package Connections for keys
to numbered components.

14

2

OVERCURRENT PROTECTION DEVICES
15

Liebert
IntelliSlot
Housing

4

A

B

C

D

6 60Hz
Alternate
Location

15

P64

CONTACTORS

P67

SECONDARY

PRIMARY

13

CONTACTORS, RELAYS and
OVERLOAD PROTECTORS
E
6

1
17

18

Typical orientation of components shown.
Component location varies by option and unit size
22

9

DOWNFLOW

CAUTION:

19

16

UPFLOW
82 83 88 89

3

75 76 94 95 96 97 91 92 93 80 81 11 12

Risk of broken or shorted low-voltage
wiring. Field-installed low-voltage wiring
must be routed with loop as shown
to allow electric box to swing.

B

A
23

24

3

DOWNFLOW LOW-VOLTAGE SECTION

58 59 84 85

21

7

20

10

8

37C38C37B38B 37 38 24 50 51 55 56 70 71 230 72 73

D

11

49-3

49-1

SH

C

12

Item 12 Installation Conditions

E

1. Follow all local installation codes.
2. Do not run CAN cables in same conduit, raceway or
chase as high-voltage wires (120-600V).
3. Separate high-voltage wires from CAN wires by 12" (305mm).
4. Contact Liebert factory for runs greater than 350ft. (107m).
5. All electrical loads may not be capable of being connected to both
power feeds, with automatic transfer switch.
Consult local representative for dual power configurations available.

13

Point of Hinged Low-Voltage
Electric Box

DS UPFLOW LOW-VOLTAGE SECTION
DPN000807
Pg. 3, Rev. 8

Liebert® DS™

Air-Cooled Systems

3.2

STANDARD ELECTRICAL CONNECTIONS
Source: DPN000807, Rev. 8
1. Primary high voltage entrance—2.5" (64mm); 1.75" (44mm); 1.375" (35mm) diameter
concentric knockouts located in bottom of box.
2. Secondary high voltage entrance—2.5" (64mm); 1.75" (44mm); 1.375" (35mm) diameter
concentric knockouts located in top of box.
3. Primary low voltage entrance—Quantity (3) 1.375" (35mm) diameter knockouts located in
bottom of unit.
4. Secondary low voltage entrance—Quantity (3) 1. 375" (35mm) diameter knockouts located in
top of box.
5. Three phase electrical service—Terminals are on main fuse block (disregard if unit has
optional disconnect switch). Three-phase service not by Emerson.
6. Earth ground—Terminal for field-supplied earth grounding wire. Earth grounding required for
Liebert units.
7. Remote unit shutdown—Replace existing jumper between Terminals 37 & 38 with
field-supplied normally closed switch having a minimum 75VA, 24VAC rating. Use field-supplied
Class 1 wiring.
8. Customer alarm inputs—Terminals for field-supplied, normally open contacts, having a
minimum 75VA, 24VAC rating, between Terminals 24 & 50, 51, 55 & 56. Use field-supplied
Class 1 wiring. Terminal availability varies by unit options.
9. Common alarm—On any alarm, normally open dry contact is closed across Terminals 75 & 76
for remote indication. 1A, 24VAC maximum load. Use Class 1 field-supplied wiring.
10. Heat rejection interlock—On any call for compressor operation, normally open dry contact is
closed across Terminals 70 & 71 (Circuit 1), 230 (Circuit 2) to heat rejection equipment. 1A,
24VAC maximum load. Use field-supplied Class 1 wiring. When a Liebert DS unit is paired with a
Liebert MC series condenser, remove jumper between Terminal 71 and Terminal 230. Three
wires must connect Terminals 70, 71 and 230 of the indoor unit to Terminals 70, 71 and 230 of the
Liebert MC series condenser.

Liebert® DS™

14

Air-Cooled Systems

3.3

OPTIONAL ELECTRICAL CONNECTIONS
Source: DPN000807, Rev. 8
11. Unit factory installed disconnect switch, Fuse Block and Main Fuses—Two types of
disconnect switches are available: Non-Locking and Locking. The Non-Locking Type consists of a
non-automatic molded case switch operational from the outside of the unit. Access to the
high-voltage electric panel compartment can be obtained with the switch in either the On or Off
position. The Locking Type is identical except access to the high-voltage electric panel
compartment can be obtained only with the switch in the Off position. Units with fused
disconnects are provided with a defeater button that allows access to the electrical panel when
power is On. The molded case switch disconnect models contain separate main fuses. Units with
fused disconnect have main fuses within the disconnect. Only fused disconnects are used on dual
disconnect options.
12. Secondary disconnect switch and earth ground
13. Three-phase electrical service—Terminals are on top of disconnect switch. Three-phase
service not by Emerson.
14. Smoke sensor alarm—Factory-wired dry contacts from smoke sensor are 91-common, 92-NO,
and 93-NC. Supervised contacts, 80 & 81, open on sensor trouble indication. This smoke sensor is
not intended to function as or replace any room smoke detection system that may be required by
local or national codes. 1A, 24VAC maximum load. Use field-supplied Class 1 wiring.
15. Reheat and humidifier lockout—Remote 24VAC required at Terminals 82 & 83 for lockout of
reheat and humidifier.
16. Condensate alarm (with condensate pump option)—On pump high water indication,
normally open dry contact is closed across Terminals 88 & 89 for remote indication. 1A, 24VAC
maximum load. Use field-supplied Class 1 wiring.
17. Remote humidifier—On any call for humidification, normally open dry contact is closed across
Terminals 11 & 12 to signal field-supplied remote humidifier. 1A, 24VAC maximum load. Use
Class 1 field-supplied wiring.
18. Auxiliary cool contact—On any call for Econ-O-coil operation, normally open dry contact is
closed across Terminals 72 & 73 on dual cool units only. 1A, 24VAC maximum load. Use
field-supplied Class 1 wiring.

3.4

OPTIONAL LOW-VOLTAGE TERMINAL PACKAGE CONNECTIONS
Source: DPN000807, Rev. 8
19. Remote unit shutdown—Two additional contact pairs available for unit shutdown (labeled as
37B & 38B, 37C and 38C). Replace jumpers with field-supplied, normally closed switch having a
minimum rating of 75VA, 24VAC. Use field-supplied Class 1 wiring.
20. Common alarm—On any alarm, two additional normally open dry contacts are closed across
Terminals 94 & 95 and 96 & 97 for remote indication. 1A, 24VAC maximum load. Use
field-supplied Class 1 wiring.
21. Main fan auxiliary switch—On closure of main fan contactor, normally open dry contact is
closed across Terminals 84 & 85 for remote indication. 1A, 24VAC maximum load. Use
field-supplied Class 1 wiring.
22. Liebert Liqui-tect™ shutdown and dry contact—On Liebert Liqui-tect activation, normally
open dry contact is closed across Terminals 58 & 59 for remote indication (Liebert Liqui-tect
sensor ordered separately). 1A, 24VAC maximum load. Use field-supplied Class 1 wiring.

15

Liebert® DS™

Air-Cooled Systems

3.5

DIMENSIONS—LIEBERT DS 028-042, DOWNFLOW, AIR-COOLED MODELS
The following figures are general illustrations that show the dimensional layout for a Liebert DS unit.

Figure 8

Dimensions—downflow, air-cooled, 28-42kW (8-12 ton), scroll or digital scroll compressors
with centrifugal fans

Secondary Refrigerant
Piping Entrance
56-7/8" Opening
(1445mm)
33"
(838mm)

Filters are accessible
24-3/8" through top of unit only.
(619mm) Downflow electrical
Opening connections can be made
from top or bottom of unit.

Air Inlet Opening

35"
(889mm)

Secondary Entrance
High-Volt Connection(s)

TOP VIEW

3/4"
(19mm)
Bezels
Secondary Entrance
Low-Volt Connections

Minimum required
for filter replacement
5"
(127mm)

73" (1854mm)

76"
(1930mm)
34" (864mm)
Shaded area indicates a
recommended minimum
clearance for component
access.
DPN000796
Rev. 3
72" (1829mm)

2"
(51mm)
Table 6

FRONT VIEW

Weights—downflow, air-cooled, 28-42kW (8-12 ton), scroll/digital scroll compressors

Dry Weight, Approximate, lb. (kg)
Model Type

Model Size: 028-042

Air-Cooled

1470 (668)

Dual-Cool

1620 (736)

Source: DPN000796, Rev. 3

Liebert® DS™

16

Air-Cooled Systems

Figure 9

Dimensions—downflow, air-cooled, 28-42kW (8-12 ton), front and/or rear discharge models

24" (610mm)

Secondary Refrigerant
Piping Entrance

56-7/8"
(1445mm) Opening

33"
(838mm)

Required for Condenser
cleanout on Water/Glycol or
GLYCOOL/Dual Cool

5"
(127mm)

24-3/8"
(619mm)
Opening

AIR INLET OPENING

35"
(889mm)

Secondary Entrance
High-Voltage Connection(s)

Minimum required
for filter replacement
Filters are accessible
only through top of unit.

3/4"
(19mm)
Bezels

TOP VIEW

Secondary Entrance
Low-Voltage Connections

A

34"
(864mm)

Shaded area indicates a
recommended minimum
clearance for component access.

76"
(1930mm)

33-1/2"
(851mm)
19"
(483mm) Air Outlet
Opening
2"
(51mm)

FRONT VIEW

3-1/4"
(83mm)

B

3"
(76mm)

33-3/8"
19" (848mm)
(483mm) Air Outlet
Opening
3-1/4"
(81mm)

3"
(77mm)

REAR VIEW

Customer Piping and Wiring Connections
1. For primary connection locations see standard submittals DPN000803, DPN000804 or DPN000900.
A floor stand at least 9" high is recommended if primary connections locations are to be used.
2. If no floor stand is used and unit is placed directly on the floor, then do the following:
a) Use secondary connection locations (shown on standard floor planning submittals).
b) Order a condensate pump.
c) Field pipe condensate and humidier line (if ordered) to secondary connection point in
310697
compressor section.
Pg. 1, Rev. 0
d) Or order additional SFA's to relocate connection locations

Dry Weight, lb (kg) Approximate
Compressor Type
Semi-Hermetic
Scroll / Digital

Model
Air-Cooled
Dual Cool
Air-Cooled
Dual Cool

Dimensions, In. (mm)
028-042
1780 (809)
1930 (877)
1470 (668)
1620 (736)

A

B

86 (2184mm)

85 (2159)

73 (1854)

72" (1829)

Source: 310697, Pg. 1, Rev. 0

17

Liebert® DS™

Air-Cooled Systems

Figure 10

Primary connection locations—downflow, air-cooled, 28-42kW (8-12 ton), scroll or
digital scroll compressors with centrifugal fans

NOTE: Drawing not to scale.
Tolerance on
all piping dimensions
is ± 1/2" (13mm).

A

A
FRONT VIEW

All dimensions from
rear corner of unit,
including panels

X

SECTION A-A

O

16-1/16"
(408mm)

BLOWER
OUTLET

Y

R
L1 L2 G1 G2

B

4" (102mm)
11-3/16"
(284mm)

35"
(889mm)

ECS
LV1
LV2
LV3

HUM
CD
E1 E2

ECR

FRONT OF UNIT

DPN000804
Rev. 3

73" (1854mm)

Table 7

Piping data—downflow, air-cooled, 28-42kW (8-12 ton), scroll/digital scroll

Point

Description

X
in. (mm)

Y
in. (mm)

Connection Size / Opening
in. (mm)

R

Refrigerant Access

59-5/16 (1507)

14-3/4 (375)

11-3/16 x 4 (284 x 102)

L1

Liquid Line System 1

69-15/16 (1776)

16-13/16 (411)

1/2" Cu Sweat

L2

Liquid Line System 2

67-5/8 (1718)

16-13/16 (411)

1/2" Cu Sweat

G1

Hot Gas Discharge 1

65-1/2 (1664)

16-13/16 (411)

5/8" Cu Sweat

G2

Hot Gas Discharge 2

62-7/16 (1586)

16-13/16 (411)

5/8" Cu Sweat

Condensate Drain
(infrared humidifier or no humidifier) *

46 (1168)

29-1/2 (749)

3/4" FPT

CD

Condensate Drain
(steam generating humidifier) *

46 (1168)

29-1/2 (749)

1-1/4" FPT

HUM

Humidifier Supply Line

ECS
ECR

W/ Optional Pump

46 (1168)

29-1/2 (749)

1/2" Cu Sweat

53-1/2 (1359)

29 (737)

1/4" Cu Sweat

Econ-O-Coil Supply

54-7/8 (1394)

22-9/16 (573)

1-5/8" Cu Sweat

Econ-O-Coil Return

49-3/8 (1254)

30-3/4 (781)

1-5/8" Cu Sweat

E1

Electrical Conn. (High Volt)

55-1/2 (1410)

31-1/4 (794)

2-1/2"

E2

Electrical Conn. (High Volt)

52-7/16 (1332)

31-1/4 (794)

2-1/2"

LV1

Electrical Conn. (Low Volt)

2-1/4 (57)

27 (686)

7/8"

LV2

Electrical Conn. (Low Volt)

2-1/4 (57)

29 (737)

7/8"

LV3

Electrical Conn. (Low Volt)

2-1/4 (57)

31 (787)

7/8"

B

Blower Outlet

21-15/16 (557)

18-1/16 (459)

18-3/4 x 16-1/16 (476 x 408)

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN000804, Rev. 3

Liebert® DS™

18

Air-Cooled Systems

Figure 11

Disassembly dimensions—downflow, air-cooled, 28-42kW (8-12 ton), scroll or digital scroll
compressors with centrifugal fans

Filter & Electric
Box Assembly

39"
(991mm)

76"
(1930mm)
Assembled
Height

Blower & Coil
Assembly

Compressor Assembly

76"
(1930mm)

60-3/16"
(1529mm)

37"
(940mm)

33"
(838mm)

13"
(330mm)

59" (1499mm)
72" (1829mm)
Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.
DPN000802
Rev. 2
Table 8

Component weights—downflow, air-cooled, 28-42kW (8-12 ton), scroll or digital scroll
compressors
Dry Weight, Approximate, lb. (kg)
Air-Cooled

Dual-Cool

Compressor Assembly

490 (223)

490 (223)

Filter and Electric Box Assembly

210 (96)

210 (96)

Blower and Coil Assembly

770 (350)

920 (418)

Component

Source: DPN000802, Rev. 2

19

Liebert® DS™

Air-Cooled Systems

Figure 12

Dimensions—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressors with
centrifugal fans
Secondary Refrigerant
Piping Entrance

Filters are accessible
through top of unit only.
Downflow electrical
connections can be made
from top or bottom of unit.

56-7/8"
Opening
(1445mm)

33"
(838mm)

Air Inlet Opening

24-3/8"
(619mm)
Opening

35"
(889mm)

3/4" Bezels
(19mm)
Secondary Entrance
High Volt Connection(s)

Secondary Entrance
Low Volt Connections
TOP VIEW
86" (2184mm)
Minimum required
for filter replacement
5"
(127mm)

76"
(1930mm)

34"
(864mm)

2"
(51mm)

Table 9

Shaded area indicates a
recommended minimum
clearance for component
access.

85" (2159mm)
FRONT VIEW

Weights—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressors

Dry Weight, Approximate, lb. (kg)
Model Type

Model Size: 028-042

Air-Cooled

1780 (809)

Dual-Cool

1930 (877)

Source: DPN000795, Rev. 4

Liebert® DS™

20

DPN000795
Rev. 4

Air-Cooled Systems

Figure 13

Primary connection locations—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic
compressors with centrifugal fans

NOTE: Drawing not to scale.
Tolerance on
all piping dimensions
is ± 1/2" (13mm).

A

A
FRONT VIEW
SECTION A-A

X

BLOWER
OUTLET
L1 L2 G1 G2

16-7/16"
(418mm)

Y

16-1/16"
(408mm)
B

35"
(889mm)

ECS
LV1
LV2
LV3

HUM
CD
E1 E2

ECR

FRONT OF UNIT

DPN000803
Rev. 4

86"
(2184mm)

Point

O

R

4" (102mm)

Table 10

All dimensions from
rear corner of unit
including panels

Piping data—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressors
Description

X
in. (mm)

Y
in. (mm)

Connection Size / Opening
in. (mm)

63 (1600)

13-13/16 (351)

16-7/16 x 4 (418 x 102)

R

Refrigerant Access

L1

Liquid Line System 1

79-3/16 (2011)

16-3/4 (425)

1/2" Cu Sweat

L2

Liquid Line System 2

76-1/2 (1943)

16-3/4 (425)

1/2" Cu Sweat

G1

Hot Gas Discharge 1

73-7/8 (1876)

16-3/4 (425)

5/8" Cu Sweat

Hot Gas Discharge 2

G2

CD

70-1/8 (1780)

16-3/4 (425)

5/8" Cu Sweat

Condensate Drain
(infrared humidifier or no humidifier)*

46 (1168)

29-1/2 (749)

3/4" FPT

Condensate Drain
(steam generating humidifier)*

46 (1168)

29-1/2 (749)

1-1/4" FPT

46 (1168)

29-1/2 (749)

1/2" Cu Sweat

W/ Optional Pump
HUM

Humidifier Supply Line

53-1/2 (1359)

29 (737)

1/4" Cu Sweat

ECS

Econ-O-Coil Supply

54-7/8 (1394)

22-9/16 (573)

1-5/8" Cu Sweat

ECR

Econ-O-Coil Return

49-3/8 (1254)

30-3/4 (781)

1-5/8" Cu Sweat

E1

Electrical Conn. (High Volt)

55-1/2 (1410)

31-1/4 (794)

2-1/2"

E2

Electrical Conn. (High Volt)

52-7/16 (1332)

31-1/4 (794)

2-1/2"

LV1

Electrical Conn. (Low Volt)

2-1/4 (57)

27 (686)

7/8"

LV2

Electrical Conn. (Low Volt)

2-1/4 (57)

29 (737)

7/8"

LV3

Electrical Conn. (Low Volt)

B

Blower Outlet

2-1/4 (57)

31 (787)

7/8"

21-15/16 (558)

18-1/16 (459)

18-3/4 x 16-1/16 (476 x 408)

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN000803, Rev. 4

21

Liebert® DS™

Air-Cooled Systems

Figure 14

Disassembly dimensions—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic
compressors with centrifugal fans

Filter & Electric
Box Assembly
39"
(991mm)
39"
991mm

Compressor Assembly

76"
(1930mm)
Assembled
Height

Blower & Coil
Assembly

76"
(1930mm)

60-3/16"
(1529mm)

37"
(940mm)

33"
(838mm)

26"
(660mm)

59" (1499mm)
85" (2159mm)
Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.
Table 11

DPN000801
Rev. 2

Component weights—downflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressors
Dry Weight, Approximate, Including Panels, lb (kg)
Air-Cooled

Dual-Cooled

Compressor Assembly

800 (364)

800 (364)

Filter and Electric Box Assembly

210 (96)

210 (96)

Blower and Coil Assembly

770 (350)

920 (418)

Component

Source: DPN000801, Rev. 2

Liebert® DS™

22

Air-Cooled Systems

3.6

DIMENSIONS—LIEBERT DS 053-077, DOWNFLOW, AIR-COOLED MODELS

Figure 15

Dimensions—downflow, air-cooled, 53-77kW (15-22 ton), scroll or digital scroll compressors
with centrifugal fans
Digital scroll compressors
not available on DS 077.

Second Refrigerant
Piping Entrance

80" Opening
(2032mm)

33"
(838mm)
35"
(889mm)

Notes: Filters are accessible
through top of unit only.
24-5/8"
(619mm)
Opening

AIR INLET OPENING

Secondary Entrance
High-Volt Connection(s)

Downflow electrical
connections can be made
from top or bottom of unit.

3/4"
(19mm)
Bezels

TOP VIEW

Secondary Entrance
Low-Volt Connections

Minimum required
for filter replacement

A
5"
(127mm)

76"
(1930mm)

34"
(864mm)

2"
(51mm)

Shaded area indicates a
recommended minimum
clearance for component access.

B

DPN000925
Rev. 2

FRONT VIEW

Table 12

Weights—downflow, air-cooled, 53-77kW (15-22 ton), scroll or digital scroll compressors
Dry Weight, lb (kg) Approximate

Model No.

DS 053

DS 070

DS 077 *

Air Cooled

1920 (871)

1970 (894)

2020 (916)

Dual Cool

2100 (953)

2150 (975)

2200 (998)

Dimensions, in (mm)
Air Cooled “A”

98 (2489)

98 (2489)

98 (2489)

Air Cooled “B”

97 (2464)

97 (2464)

97 (2464)

* Digital scroll compressors not available on DS 077
Source: DPN000925, Rev. 2

23

Liebert® DS™

Air-Cooled Systems

Figure 16

Primary connection locations—downflow, air-cooled, 53-77kW (15-22 ton), scroll or digital
scroll compressors with centrifugal fans
Digital scroll compressors
not available on DS 077.

NOTE: Drawing not to scale.
Tolerance on
all piping dimensions
is ± 1/2" (13mm).

A

A
FRONT VIEW
SECTION A-A
16-1/16"
(408mm)

BLOWER
OUTLET

All dimensions from
rear corner of unit
including panels

X

O

BLOWER
OUTLET

Y

R
4"
(102mm)

L1 L2

G1 G2

12-3/16"
(310mm)

35"
(889mm)

B1

B2

ECS
HUM ECRCD

LV1
LV2
LV3

E1 E2

98" (2489mm)

FRONT OF UNIT
Table 13

Piping data—downflow, air-cooled, 53-77kW (15-22 ton), scroll or digital scroll compressors ***

Point
R

DPN000929
Rev. 4

Description
Refrigerant Access

X
in. (mm)

Y
in. (mm)

81-3/4 (2076)

14-3/4 (374)

Connection Size / Opening
in. (mm)
12-3/16 x 4 (310 x 102)
53kW (15 ton) / 70 & 77kW (20 & 22 ton)

L1

Liquid Line System 1

94-11/16 (2405)

16-3/4 (425)

L2

Liquid Line System 2

91-7/8 (2334)

16-3/4 (425)

1/2" / 5/8" Cu Sweat

G1

Hot Gas Discharge 1

88-3/4 (2254)

16-3/8 (416)

7/8" / 1-1/8" Cu Sweat

G2

Hot Gas Discharge 2

85-9/16 (2173)

16-3/8 (416)

7/8" / 1-1/8" Cu Sweat

Condensate Drain
(infrared humidifier or no humidifier)*

67-11/16 (1719)

30-1/2 (775)

3/4" FPT

Condensate Drain
(steam generating humidifier)*

67-11/16 (1719)

30-1/2 (775)

1-1/4" FPT

W/ Optional Pump

67-11/16 (1719)

30-1/2 (775)

1/2" Cu Sweat

CD

1/2" / 5/8" Cu Sweat

HUM

Humidifier Supply Line

76-1/2 (1943)

29 (736)

1/4" Cu Sweat

ECS**

Econ-O-Coil Supply

78-5/8 (1997)

22-1/4 (565)

2-1/8" Cu Sweat

ECR**

Econ-O-Coil Return

72 (1829)

29 (737)

2-1/8" Cu Sweat

E1

Electrical Conn. (High Volt)

78-1/2 (1994)

31-1/8 (790)

2-1/2"

E2

Electrical Conn. (High Volt)

75-3/8 (1915)

31-1/8 (790)

2-1/2"

LV1

Electrical Conn. (Low Volt)

1-7/8 (48)

28-1/2 (724)

7/8"

LV2

Electrical Conn. (Low Volt)

1-7/8 (48)

30-1/4 (768)

7/8"

LV3

Electrical Conn. (Low Volt)

1-7/8 (48)

32 (813)

7/8"

Blower Outlet (15 x 15)

23-1/8 (587)

18-1/16 (459)

18-3/4 x 16-1/16 (476 x 408)

Blower Outlet (15 x 11)

27-3/4 (705)

18-1/16 (459)

14-3/4 x 16-1/16 (375 x 408)

Blower Outlet (15 x 15)

50-3/8 (1280)

18-1/16 (459)

18-3/4 x 16-1/16 (476 x 408)

Blower Outlet (15 x 11)

54-3/8 (1381)

18-1/16 (459)

14-3/4 x 16-1/16 (375 x 408)

B1
B2

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
** Supplied on Dual-Cooling systems only (four-pipe system)
*** Digital scroll compressors not available on DS 077.
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN000929, Rev 4

Liebert® DS™

24

Air-Cooled Systems

Figure 17

Dimensions—downflow, air-cooled, 53-77kW (15-22 ton), front and/or rear discharge models
with EC fans
Required for Condenser
cleanout on Water/Glycol or
GLYCOOL/Dual Cool

Customer Piping and Wiring Connections

24" (610mm)
1. For primary connection locations see standard submittals DPN000928,
DPN000929 or DPN000933.
A floor stand at least 9" high is recommended if primary connections locations are to be used.
2. If no floor stand is used and unit is placed directly on the floor, then do the following:
a) Use secondary connection locations (shown on standard floor planning submittals).
b) Order a condensate pump.
c) Field pipe condensate and humidier line (if ordered) to secondary connection point in
compressor section.
d) Or order additional SFA's to relocate connection locations

Minimum required
for filter replacement
Filters are accessible
only through top of unit.
5"
(127mm)

Secondary Refrigerant
Piping Entrance
80" (2032mm)
Opening
35"
(889mm)
33"
(838mm)

25-5/8"
(619mm)
Opening

AIR INLET OPENING

Secondary Entrance
High-Voltage Connection(s)

34"
Shaded area indicates a
(864mm)
3/4"
recommended minimum
(19mm)
clearance for component access.
Secondary Entrance
Low-Voltage Connections

TOP VIEW

A

76"
(1930mm)
15-1/8"
(384mm)
29-1/4"
(743mm)
Air Outlet
Opening

2"
(51mm)

15-1/8"
(384mm)

15-1/8"
(384mm)
29-5/8"
(752mm)
Air Outlet
Opening

29-5/8"
(752mm)
Air Outlet
Opening

3-1/4"
(83mm)

FRONT VIEW
B

15-1/8"
(384mm)

3-1/4"
(83mm)

29-1/4"
(743mm)
Air Outlet
Opening

REAR VIEW
310697
Pg. 2, Rev. 0

3-1/8"
(79mm)

Dry Weight, lb (kg) Approximate
Compressor Type
Semi-Hermetic
Scroll / Digital

Dimensions, in. (mm)

Model

53

70

77 *

Air-Cooled
Dual Cool
Air-Cooled
Dual Cool

2350 (1069)
2530 (1150
1920 (873)
2100 (955)

2400 (1091)
2580 (1173)
1970 (896)
2150 (978)

2450 (1114)
2630 (1196)
2020 (919)
2200 (1000)

A

B

109 (2769)

108 (2743)

98 (2489)

97 (2464)

* Digital scroll compressors not available on 077 models
Source: 310697, Pg. 2, Rev. 0

25

Liebert® DS™

Air-Cooled Systems

Figure 18

Primary connection locations—downflow air-cooled 53-77kW (15-22 ton), scroll or digital
scroll compressors with EC fans, front, rear or bottom discharge
Digital scroll compressors not
available on 077 models.

NOTE: Drawing not to scale.
Tolerance on
all piping dimensions
is ± 1/2" (13mm).

A

A
FRONT VIEW
SECTION A-A

All dimensions from
rear corner of unit
including panels

X
O

Y

R
4" (102mm)

L1 L2

BLOWER
OUTLET

G1 G2

35"
(889mm)

12-3/16"
(310mm)
ECS ECR
CD
E1 E2

B1

LV1
LV2
LV3

HUM
98" (2489mm)

DPN002182
Rev. 1

FRONT OF UNIT
Table 14

Point
R

Piping details—downflow air-cooled 53-77kW (15-22 ton) with EC fans, scroll or digital scroll
compressors ***
Description
Refrigerant Access

X
in. (mm)

Y
in. (mm)

Connection Size / Opening
in. (mm)

81-3/4 (2076)

14-3/4 (374)

12-3/16x4 (310x102)

53kW (15 ton)/ 70 & 77kW (20 & 22 ton)
L1

Liquid Line System 1

94-11/16 (2405)

16-3/4 (425)

1/2 / 5/8 Cu Sweat

L2

Liquid Line System 2

91-7/8 (2334)

16-3/4 (425)

1/2 / 5/8 Cu Sweat

G1

Hot Gas Discharge 1

88-3/4 (2254)

16-3/8 (416)

7/8 / 1-1/8 Cu Sweat

G2

Hot Gas Discharge 2

85-9/16 (2173)

16-3/8 (416)

7/8 / 1-1/8 Cu Sweat

CD

Condensate Drain
(Infrared Humidifier or No Humidifier)*

68-3/8 (1737)

31-3/8 (797)

3/4 FPT

68-3/8 (1737)

31-3/8 (797)

1/2 Cu Sweat

W/ Optional Pump
HUM

Humidifier Supply Line

76-1/2 (1943)

29 (736)

1/4 Cu Sweat

ECS**

Econ-O-Coil Supply (DS Only)

78-5/8 (1997)

22-1/4 (565)

2-1/8 Cu Sweat

ECR**

Econ-O-Coil Return (DS Only)

73-15/16 (1862)

26-9/16 (675)

2-1/8 Cu Sweat

E1

Electrical Conn. (High Volt)

78-1/2 (1994)

31-1/8 (790)

2-1/2

E2

Electrical Conn. (High Volt)

75-3/8 (1915)

31-1/8 (790)

2-1/2

LV1

Electrical Conn. (Low Volt)

2 (51)

29 (737)

7/8

LV2

Electrical Conn. (Low Volt)

2 (51)

30-7/8 (784)

7/8

LV3

Electrical Conn. (Low Volt)

2 (51)

32 (813)

7/8

B1

Blower Outlet

4-1/2 (114)

33 (838)

58-3/8x30 (1483x762)

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
** Supplied on Dual-Cooling systems only (four-pipe system)
*** Digital scroll compressors not available on DS 077
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN002182, Rev. 1

Liebert® DS™

26

Air-Cooled Systems

Figure 19

Disassembly dimensions—downflow, air-cooled, 53-77kW (15-22 ton), scroll or digital scroll
compressors
Digital scroll compressors
not available on DS 077.

Filter & Electric
Box Assembly

Forward curved
blowers shown.
DA units only
available with EC
blowers, optional
on DS units.

39"
(991mm)

Compressor Assembly
Blower & Coil
Assembly

76"
(1930mm)

76"
(1930mm)
Assembled
Height

59-7/16"
(1509mm)
37"
(940mm)
DS053-DS077 =
15" (381mm)
DA080,DA085 =
17" (432mm)

82" (2083mm)
Assembled Length
97" (2464mm)
NOTES: Drawing views are simplified with panels removed to show overall dimensions. DPN000927
See disassembly and handling instructions in installation manual.
Rev. 4
33"
(838mm)

Table 15

Component weights—downflow, air-cooled, 53-77kW (15-22 ton), scroll or digital scroll
compressors *

Dry Weight, Approximate, Including Panels, lb (kg)
Component

Air-Cooled

Dual-Cool

Compressor Assembly

540 (246)

540 (246)

Filter and Electric Box Assembly

250 (114)

250 (114)

Blower and Coil Assembly

1230 (560)

1410 (641)

* Digital scroll compressors not available on DS 077
Source: DPN00927, Rev. 4

27

Liebert® DS™

Air-Cooled Systems

Figure 20

Dimensions—downflow, air-cooled, 53-77kW (15-22 ton) with centrifugal fans, semi-hermetic
compressors with centrifugal fans
Second Refrigerant
Piping Entrance

33"
(838mm)

80" Opening
(2032mm)

Notes: Filters are accessible
through top of unit only.
24-5/8"
(625mm)
Opening

AIR INLET OPENING

35"
(889mm)

Downflow electrical
connections can be made
from top or bottom of unit.

3/4" Bezels
(19mm)
Secondary Entrance
High-Volt Connection(s)

TOP VIEW

Secondary Entrance
Low-Volt Connections

Minimum required
for filter replacement

109" (2769mm)

5"
(125mm)

76"
(1930mm)

34"
(864mm)

108" (2743mm)

2"
(51mm)

Table 16

Shaded area indicates a
recommended minimum
clearance be provided for
DPN000924
component access.

Rev. 3

FRONT VIEW

Weights—downflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic compressors
Dry Weight, Approximate, lb. (kg)
Model Size

Model Type

053

070

077

Air-Cooled

2350 (1069)

2400 (1091)

2450 (1114)

Dual-Cool

2530 (1150)

2580 (1173)

2630 (1196)

Source: DPN000924, Rev. 3

Liebert® DS™

28

Air-Cooled Systems

Figure 21

Primary connection locations—downflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic
compressors with centrifugal fans

NOTE: Drawing not to scale.
All dimensions from
rear corner of unit
including panels

Tolerance on
all piping dimensions
is ± 1/2" (13mm).

A

A
FRONT VIEW
X

SECTION A-A

16-1/16"
(408mm)

BLOWER
OUTLET

O

BLOWER
OUTLET

Y

R
4" (102mm)

L1 L2

G1 G2

B2
16-7/16"
(418mm)

35"
(889mm)

B1

ECS
LV1
LV2
LV3

HUMECR CD
E1 E2

109" (2769mm)

DPN000928
Rev. 4

FRONT OF UNIT
Table 17
Point
R
L1
L2
G1
G2

Piping data—downflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic compressors
Description

Refrigerant Access

Liquid Line System 1
Liquid Line System 2
Hot Gas Discharge 1
Hot Gas Discharge 2
Condensate Drain
(infrared humidifier or no humidifier) *
CD
Condensate Drain
(steam generating humidifier)*
W/ Optional Pump
HUM Humidifier Supply Line
ECS** Econ-O-Coil Supply
ECR** Econ-O-Coil Return
E1
Electrical Conn. (High Volt)
E2
Electrical Conn. (High Volt)
LV1
Electrical Conn. (Low Volt)
LV2
Electrical Conn. (Low Volt)
LV3
Electrical Conn. (Low Volt)
Blower Outlet (15 x 15)
B1
Blower Outlet (15 x 11)
Blower Outlet (15 x 15)
B2
Blower Outlet (15 x 11)

X
in. (mm)

Y
in. (mm)

Connection Size / Opening
in. (mm)

82-3/4 (2102)

13-7/8 (352)

16-7/16 x 4 (418 x 102)
53kW (15 tons) / 70 & 77kW (20 & 22 tons)

97 (2464)
93-5/16 (2370)
90-5/8 (2302)
88 (2235)

16-7/8 (428)
16-7/8 (428)
16-5/8 (422)
16-5/8 (422)

1/2" / 5/8" Cu Sweat
1/2" / 5/8" Cu Sweat
7/8" / 1-1/8" Cu Sweat
7/8" / 1-1/8" Cu Sweat

67-11/16 (1719)

30-1/2 (775)

3/4" FPT

67-11/16 (1719)

30-1/2 (775)

1-1/4" FPT

67-11/16 (1719)
76-1/2 (1943)
78-5/8 (1997)
72 (1829)
78-1/2 (1994)
75-3/8 (1915)
1-7/8 (48)
1-7/8 (48)
1-7/8 (48)
23-1/8 (587)
27-3/4 (705)
50-3/8 (1280)
54-3/8 (1381)

30-1/2 (775)
29 (736)
22-1/4 (565)
29 (737)
31-1/8 (790)
31-1/8 (790)
28-1/2 (724)
30-1/4 (768)
32 (813)
18-1/16 (459)
18-1/16 (459)
18-1/16 (459)
18-1/16 (459)

1/2" Cu Sweat
1/4" Cu Sweat
2-1/8" Cu Sweat
2-1/8" Cu Sweat
2-1/2"
2-1/2"
7/8"
7/8"
7/8"
18-3/4 x 16-1/16 (476 x 408)
14-3/4 x 16-1/16 (375 x 408)
18-3/4 x 16-1/16 (476 x 408)
14-3/4 x 16-1/16 (375 x 408)

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
** Supplied on Dual-Cooling Systems only (four-pipe system)
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN000928, Rev. 4

29

Liebert® DS™

Air-Cooled Systems

Figure 22

Primary connection locations—downflow, air-cooled 53-77kW (15-22 ton), semi-hermetic
compressors with EC fans, front, rear or bottom discharge

NOTE: Drawing not to scale.
Tolerance on
all piping dimensions
is ± 1/2" (13mm).

All dimensions from
rear corner of unit
including panels

A

A
FRONT VIEW

X

O

SECTION A-A

Y

R
4" (102mm)

L1 L2

G1 G2

35"
(889mm)

BLOWER
OUTLET

16-7/16"
(418mm)
ECS ECR

CD

E1

B1

LV1
LV2
LV3

HUM
109" (2769mm)

DPN002179
Rev. 0

FRONT OF UNIT

Table 18

Point
R

Piping details—downflow, air-cooled 53-77kW (15-22 ton) with EC fans, semi-hermetic
compressors
Description
Refrigerant Access

X
in. (mm)

Y
in. (mm)

Connection Size / Opening
in. (mm)

82-3/4 (2102)

13-7/8 (352)

16-7/16 x 4 (4181x102)

53kW (15 ton) /70 & 77kw (20 & 22 ton)
L1

Liquid Line System 1

97 (2464)

16-7/8 (428)

1/2 / 5/8 Cu Sweat

L2

Liquid Line System 2

93-5/16 (2370)

16-7/8 (428)

1/2 / 5/8 Cu Sweat

G1

Hot Gas Discharge 1

90-5/8 (2302)

16-5/8 (422)

7/8 / 1-1/8 Cu Sweat

G2

Hot Gas Discharge 2

88 (2235)

16-5/8 (422)

7/8 / 1-1/8 Cu Sweat

CD

Condensate Drain
(Infrared Humidifier or No Humidifier)*

68-3/8 (1737)

31-3/8 (797)

3/4 FPT

W/ Optional Pump

68-3/8 (1737)

31-3/8 (797)

1/2 Cu Sweat

Humidifier Supply Line

76-1/2 (1943)

29 (736)

1/4 Cu Sweat

HUM
ECS**

Econ-O-Coil Supply

78-5/8 (1997)

22-1/4 (565)

2-1/8 Cu Sweat

ECR**

Econ-O-Coil Return

73-15/16 (1862)

26-9/16 (675)

2-1/8 Cu Sweat

E1

Electrical Conn. (High Volt)

78-1/2 (1994)

31-1/8 (790)

2-1/2

E2

Electrical Conn. (High Volt)

75-3/8 (1915)

31-1/8 (790)

2-1/2

LV1

Electrical Conn. (Low Volt)

2 (51)

29 (737)

7/8

LV2

Electrical Conn. (Low Volt)

2 (51)

30-7/8 (784)

7/8

LV3

Electrical Conn. (Low Volt)

2 (51)

32 (813)

7/8

B1

Blower Outlet

4-1/2 (114)

33 (838)

58-3/8 x 30 (1483x762)

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
** Supplied on Dual-Cooling systems only (four-pipe system)
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN002179, Rev. 0

Liebert® DS™

30

Air-Cooled Systems

Figure 23

Disassembly dimensions—downflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic
compressors with centrifugal fans

Filter & Electric
Box Assembly

39"
(991mm)

Compressor Assembly
76"
(1930mm)
Assembled
Height

Blower & Coil
Assembly

76"
(1930mm)

59-7/16"
(1509mm)

37"
(940mm)
33"
(838mm)

26"
(660mm)

82" (2083mm)
108" (2743mm)
Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.
DPN000926
Rev. 4
Table 19

Component weights—downflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic compressors
Dry Weight, Approximate, Including Panels, lb (kg)

Component
Compressor Assembly

Air-Cooled

Dual-Cool

970 (441)

970 (441)

Filter and Electric Box Assembly

250 (114)

250 (114)

Blower and Coil Assembly

1230 (560)

1410 (641)

Source: DPN000926, Rev. 4

31

Liebert® DS™

Air-Cooled Systems

3.7

DIMENSIONS—LIEBERT DS 105, DOWNFLOW, AIR-COOLED MODELS

Figure 24

Dimensions—downflow, air-cooled, 105kW (30 ton), standard scroll and semi-hermetic
compressors with centrifugal fans
Secondary Refrigerant
Piping Entrance
102-13/16"
(2611mm) Opening

33"
(838mm)

Notes: Filters are accessible
through top of unit only.
Downflow electrical
connections can be made
from top or bottom of unit.
24-3/8"
Opening
(619mm)

AIR INLET OPENING

35"
(889mm)

Digital scroll
compressors not
available on DS 105.

3/4"
(19mm)
Bezels

Secondary Entrance
High-Volt Connection(s)

Secondary Entrance
Low-Volt Connections

TOP VIEW

Minimum required
for filter replacement

132" (3353mm)
5"
(127mm)

76"
(1930mm)

34" (864mm)
Shaded area indicates a
recommended minimum
clearance be provided for
component access.

131" (3327mm)

DPN0001012
Rev. 4

FRONT VIEW

Table 20

Weights—downflow, air-cooled, 105kW (30 ton), standard scroll and semi-hermetic
compressors
Forward-Curved Fans

Compressor Type

Cooling Type

Semi-Hermetic
Compressors

Air-Cooled

Scroll Compressors *

Weight, lb. (kg)
3040 (1382)

Dual-Cool

3400 (1545)

Air-Cooled

2920 (1327)

Dual-Cool

3280 (1491)

* Digital scroll compressors not available on DS 105
Source: DPN001012, Rev. 4

Liebert® DS™

32

Air-Cooled Systems

Figure 25

Primary connection locations—downflow, air-cooled, 105kW (30 ton), standard scroll and
semi-hermetic compressors with centrifugal fans

Digital scroll compressors not
available on 105 models.
NOTE: Drawing not to scale.
Tolerance on
all piping dimensions
is ± 1/2" (13mm).

G1 G2 R

A

A
FRONT VIEW

BLOWER
OUTLET

BLOWER
OUTLET

4" (102mm)
L1 L2
16-7/16"
(418mm)

B3

ECS

X

SECTION A-A

15-11/16"
(398mm)

Y
35"
(889mm)

B1

B2

LV1
LV2
LV3

CD
E2

O

BLOWER
OUTLET

ECR

HUM E1

All dimensions from
rear corner of unit
including panels

131" (3327mm)

DPN001014
Rev. 3

FRONT OF UNIT

Table 21

Piping data—downflow, air-cooled, 105kW (30 ton), standard scroll*** and semi-hermetic
compressors

Point

Description

X
in. (mm)

Y
in. (mm)

Connection Size / Opening
in. (mm)

109 (2769)

15-3/4 (400)

16-7/16 x 4 (418 x 102)

R

Refrigerant Access

L1

Liquid Line System 1

121-3/4 (3092)

16-3/4 (425)

5/8" Cu Sweat

L2

Liquid Line System 2

118-1/8 (3000)

16-3/4 (425)

5/8" Cu Sweat

G1

Hot Gas Discharge 1

118-1/4 (3004)

14-1/4 (362)

1-1/8" Cu Sweat

G2

Hot Gas Discharge 2

115-5/8 (2937)

14-1/4 (362)

1-1/8" Cu Sweat

Condensate Drain
(infrared humidifier or no humidifier)*

83-13/16 (2129)

30 (762)

3/4" FPT

Condensate Drain
(steam generating humidifier)*

83-13/16 (2129)

30 (762)

1-1/4" FPT

83-13/16 (2129)

30 (762)

1/2" Cu Sweat

102-3/4 (2610)

31-3/4 (806)

1/4" Cu Sweat

CD

W/ Optional Pump
HUM

Humidifier Supply Line

ECS**

Econ-O-Coil Supply

101-7/8 (2588)

29 (737)

2-5/8" Cu Sweat

ECR**

Econ-O-Coil Return

94-9/16 (2402)

29 (737)

2-5/8" Cu Sweat

E1

Electrical Conn. (High Volt)

98-1/8 (2492)

31-1/4 (794)

2-1/2"

E2

Electrical Conn. (High Volt)

91 (2311)

31-1/4 (794)

2-1/2"

LV1

Electrical Conn. (Low Volt)

2 (51)

28-1/4 (718)

7/8"

LV2

Electrical Conn. (Low Volt)

2 (51)

30-1/4 (768)

7/8"

LV3

Electrical Conn. (Low Volt)

2 (51)

32 (813)

7/8"

B1

Blower Outlet

27-7/8 (708)

18 (457)

14-1/2 x 15-11/16 (368 x 398)

B2

Blower Outlet

52-1/16 (1322)

18 (457)

14-1/2 x 15-11/16 (368 x 398)

B3

Blower Outlet

76-1/4 (1937)

18 (457)

14-1/2 x 15-11/16 (368 x 398)

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do not
trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply with all
local codes.
** Supplied on Dual-Cooling systems only (four-pipe system)
*** Digital scroll compressors not available on DS 105
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN001014, Rev. 3

33

Liebert® DS™

Air-Cooled Systems

Figure 26

Dimensions—downflow, air-cooled, 105kW (30 ton), front discharge models with EC fans
Secondary Refrigerant
Piping Entrance
102-7/8" (2611mm)
Opening

33"
(838mm)

24-3/8"
(619mm)
Opening

AIR INLET OPENING

35"
(889mm)

Downflow electrical
connections can be made
from top or bottom of unit

3/4"
(19mm)

TOP VIEW
Secondary Entrance
High-Voltage Connection(s)

Required for Condenser
cleanout on Water/Glycol or
GLYCOOL/Dual Cool

Secondary Entrance
Low-Voltage Connections

132" (3353mm)
24" (610mm)

Minimum required
for filter replacement
Filters are accessible
only through top of unit.
5"
(127mm)

76"
(1930mm)
16-1/8"
(410mm)
25-5/8"
(649mm)
Air Outlet
Opening

16-1/8"
(410mm)
24-7/8"
(649mm)
Air Outlet
Opening

16-1/8"
(410mm)
28-1/4"
(718mm)
Air Outlet
Opening
30-7/8"
(783mm)

FRONT VIEW

57-1/2"
(1459mm)

131" (3326mm)

Customer Piping and Wiring Connections

3/4"
(19mm)

34"
Shaded area indicates a
(864mm)
recommended minimum
clearance for component access.

1. For primary connection locations see standard submittals DPN001014 or DPN001015.
A floor stand at least 9" high is recommended if primary connections locations are to be used.
2. If no floor stand is used and unit is placed directly on the floor, then do the following:
a) Use secondary connection locations (shown on standard floor planning submittals).
b) Order a condensate pump.
c) Field pipe condensate and humidier line (if ordered) to secondary connection point in
310697
compressor section.
Pg. 3, Rev. 0
d) Or order additional SFA's to relocate connection locations

Dry Weight, lb (kg) Approximate
Compressor Type
Semi-Hermetic
Scroll

Model

105

Air-Cooled
Dual Cool
Air-Cooled
Dual Cool

2774 (1258)

3134 (1422)
2654 (1204)

3014 (1367)

Digital scroll compressors not available on DS 105
Source: 310697, Pg. 3, Rev. 0

Liebert® DS™

34

Air-Cooled Systems

Figure 27

Primary connection locations—downflow, air-cooled 105kW (30 ton), standard scroll and
semi-hermetic compressors with EC fans, front, rear or bottom discharge

Digital scroll compressors
not available on 105
models.
NOTE: Drawing not to scale.
A
Tolerance on
all piping dimensions
is ± 1/2" (13mm).

A All dimensions from
rear corner of unit
including panels

FRONT OF UNIT
SECTION A-A

X

O

Y
G1 G2 R
4" (102mm)
L1 L2
16-7/16"
(418mm)

35"
(889mm)

BLOWER
OUTLET
ECS ECR
CD
E1

E2

B1

LV1
LV2
LV3

HUM
132" (3353mm)

DPN002154
Rev. 0

FRONT VIEW

Table 22

Piping data—downflow, air-cooled 105kW (30 ton) with EC fans, standard scroll*** and
semi-hermetic compressors
X
in. (mm)

Y
in. (mm)

Connection Size / Opening
in. (mm)

109 (2769)

15-3/4 (400)

16-7/16 x 4 (418 x 102)

Liquid Line System 1

121-3/4 (3092)

16-3/4 (425)

5/8 Cu Sweat

L2

Liquid Line System 2

118-1/8 (3000)

16-3/4 (425)

5/8 Cu Sweat

G1

Hot Gas Discharge 1

118-1/4 (3004)

14-1/4 (362)

1-1/8 Cu Sweat

G2

Hot Gas Discharge 2

115-5/8 (2937)

14-1/4 (362)

1-1/8 Cu Sweat

CD

Condensate Drain
(Infrared Humidifier or No Humidifier)*

87-3/8 (2220)

31 (787)

3/4 FPT

W/ Optional Pump

83-13/16 (2129)

30 (762)

1/2 Cu Sweat

HUM

Humidifier Supply Line

85-5/16 (2167)

32-1/2 (825)

1/4 Cu Sweat

ECS **

Econ-O-Coil Supply

101-7/8 (2588)

29 (737)

2-5/8 Cu Sweat

ECR **

Econ-O-Coil Return

94-9/16 (2402)

29 (737)

2-5/8 Cu Sweat

E1

Electrical Conn. (High Volt)

98-1/8 (2492)

31 (788)

2-1/2

E2

Electrical Conn. (High Volt)

91 (2311)

31 (788)

2-1/2

LV1

Electrical Conn. (Low Volt)

2 (51)

29 (737)

7/8

LV2

Electrical Conn. (Low Volt)

2 (51)

30-7/8 (784)

7/8

LV3

Electrical Conn. (Low Volt)

2 (51)

32 (813)

7/8

B1

Blower Outlet

4-1/2 (114)

33 (838)

77-3/8 x 30 (1965 x 762)

Point

Description

R

Refrigerant Access

L1

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
** Supplied on Dual-Cooling systems only (four-pipe system)
*** Digital scroll compressors not available on DS 105
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN002154, Rev. 0

35

Liebert® DS™

Air-Cooled Systems

Figure 28

Disassembly dimensions—downflow, air-cooled, 105kW (30 ton), standard scroll compressors
with centrifugal
Digital scroll compressors not
available on 105 models.

Filter & Electric Box Assembly

39"
(991mm)
41-11/16"
(1059mm)

Compressor Assembly
Blower & Coil
Assembly

76"
(1930mm)
Assembled Height

59-7/16"
(1510mm)

76"
(1930mm)

37"
(940mm)

33"
(838mm)

26"
(660mm)

105" (2667mm)
131" (3327mm)
Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.

Table 23

DPN001058
Rev. 2

Component weights—downflow, air-cooled, 105kW (30 ton), standard scroll compressors *
Dry Weight, Approximate
Including Panels, lb (kg)
Forward-Curved Fans
Air-Cooled

Dual-Cool

Compressor Assembly

830 (377)

830 (377)

Filter and Electric Box Assembly

270 (123)

270 (123)

Blower and Coil Assembly

1820 (827)

2180 (991)

Component

* Digital scroll compressors not available on DS 105
Source: DPN001058, Rev. 2

Liebert® DS™

36

Air-Cooled Systems

Figure 29

Disassembly dimensions—downflow, air-cooled, 105kW (30 ton), semi-hermetic compressors
with centrifugal

Filter & Electric Box Assembly

39"
(991mm)
41 11/16"
(1059mm)

Compressor Assembly

76"
(1930mm)
Assembled
Height

Blower & Coil
Assembly

76"
(1930mm)

59-7/16”
(1509mm)
37"
(940mm)

33"
(838mm)

26”
(660mm)

105" (2667mm)
131" (3327mm)
Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.

Table 24

DPN001057
Rev. 2

Component weights—downflow, air-cooled, 105kW (30 ton), semi-hermetic compressors
Dry Weight, Approximate,
Including Panels, lb (kg)
Forward-Curved Fans
Air-Cooled

Dual-Cool

Compressor Assembly

950 (432)

950 (432)

Filter and Electric Box Assembly

270 (123)

270 (123)

Blower and Coil Assembly

1820 (827)

2180 (991)

Component

Source: DPN001057, Rev. 2

37

Liebert® DS™

Air-Cooled Systems

3.8

DIMENSIONS—LIEBERT DS 028-042, UPFLOW, AIR-COOLED MODELS

Figure 30

Dimensions—upflow, air-cooled, 28-42kW (8-12 ton), scroll or digital scroll compressors with
centrifugal fans
Alternate Refrigerant
Piping Entrance
Note: Front air return unit shown. For
rear return unit, in addition to front service
area shown, also include 25" (635mm) on
one side of unit for access to rear return
filter box. See DPN001196.

33"
(838mm)
35"
(889mm)

3/4" (19mm)
Bezels

TOP VIEW

High-Volt Connection(s)

Low-Volt Connection(s)

Minimum required
for blower replacement

73"
(1854mm)

1-1/2"
(38mm)

24"
(610mm)

76"
(1930mm)

34"
(864mm)

72" (1829mm)

2"
(51mm)

Table 25

Shaded area indicates a
recommended minimum
clearance for component
access.

FRONT VIEW

DPN001163
Rev. 2

Weights—upflow, air-cooled, 28-42kW (8-12 ton), scroll or digital scroll compressors

Dry Weight, Approximate, lb. (kg)
Model Type

Forward-Curved Fans

Air-Cooled

1520 (689)

Dual-Cool

1670 (758)

Source: DPN001163, Rev. 2

Liebert® DS™

38

Air-Cooled Systems

Figure 31

Primary connection locations—upflow, air-cooled, 28-42kW (8-12 ton), scroll or digital scroll
compressors with centrifugal fans

NOTES:
1. Drawing not to scale.
2. Tolerance on all piping dimensions
is ± 1/2" (13mm).
3 Field routed alternatives for refrigerant
gas and liquid line connection points.
4 See submittal page DPN001120 for
blower outlet and deck dimensional data.

All dimensions from
rear corner of unit
including panels
X

10-1/8"
(257mm)
4-1/8" (105mm)

3.

R1

ECR
ECS
HUM
CPD

BLOWER
OUTLET
4.

R2
L1 L2 G1 G2

4" (102mm)

O

Y

35"
(889mm)

11-1/8"
(283mm)

3.

LV1
LV2
LV3

E1 E2
73" (1854mm)

FRONT OF UNIT

TOP VIEW
6"
(152mm)

17-3/16"
(437mm)

R3
3.

CGD*
3-7/8"
(98mm)

17-1/16" L1 L2G1G2
(434mm)

14-1/4"
(362mm)

CGD*

15-7/8"
(403mm)

FRONT SECTION
(Left Front Panel Not Shown)

LEFT SIDE SECTION

Table 26
Point

Factory Location

DPN001119
Rev. 2

Piping data—upflow, air-cooled, 28-42kW (8-12 ton), scroll or digital scroll compressors
Description

R1

3

Refrigerant Access (Top)

R2

3

Refrigerant Access (Bottom)

X
in. (mm)

Y
in. (mm)

Connection Size / Opening
in. (mm)

60-1/2 (1537)

1-7/8" (48mm)

10-1/8 x 4-1/8 (257 x 105)

59-3/8" (1508mm)

14-3/4" (375mm)

11-1/8 x 4 (283 x 102)

L1

Liquid Line System 1

70" (1778mm)

16-3/4 (425)

1/2" Cu Sweat

L2

Liquid Line System 2

67-5/8" (1718mm)

16-3/4 (425)

1/2" Cu Sweat

G1

Hot Gas Discharge 1

65-3/8" (1661mm)

16-5/8 (422)

5/8" Cu Sweat

G2

Hot Gas Discharge 2

63" (1600mm)

16-5/8 (422)

5/8" Cu Sweat

R3

Refrigerant Access (Side)

—

—

6 x 17-3/16 (152 x 437)

CGD*

Condensate Gravity Drain

—

—

3/4" FPT

CPD

Condensate Pump Discharge (Opt)

56-1/4 (1429)

11-1/8 (283)

1/2" Cu Sweat

HUM

Humidifier Supply Line

56-1/4 (1429)

9-1/8 (233)

1/4" Cu Sweat

ECS**

Econ-O-Coil Supply

56 (1423)

7-5/16 (186)

1-5/8" Cu Sweat

ECR**

Econ-O-Coil Return

56 (1423)

4-1/2 (114)

1-5/8" Cu Sweat

E1

Electrical Conn. (High Volt)

52-3/8 (1330)

30 (762)

2-1/2"

E2

Electrical Conn. (High Volt)

46-7/8 (1191)

30 (762)

2-1/2"

LV1

Electrical Conn. (Low Volt)

19-1/2 (495)

29-1/16 (738)

7/8"

3

LV2

Electrical Conn. (Low Volt)

19-1/2 (495)

30-1/2 (775)

7/8"

LV3

Electrical Conn. (Low Volt)

19-1/2 (495)

31-15/16 (811)

7/8"

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap.
Do not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must
comply with all local codes.
** Supplied on Dual-Cool systems only (four-pipe system)
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL18825.
Source: DPN001119, Rev. 2

39

Liebert® DS™

Air-Cooled Systems

Figure 32

Disassembly dimensions—upflow, air-cooled, 28-42kW (8-12 ton), scroll or digital scroll
compressors with centrifugal fans

Blower & Electric
Box Assembly

31-1/4"
(794mm)

Compressor Assembly

Filter & Coil
Assembly

76" (1930mm)
Assembled
Height

76"
(1930mm)
45-13/16"
(1163mm)

33"
(838mm)

13"
(330mm)

59" (1499mm)

72" Assembled Length
(1829mm)
NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.

Table 27

DPN001172
Rev. 1

Component weights—upflow, air-cooled, 28-42kW (8-12 ton), scroll or digital scroll
compressors

Dry Weight, Approximate, Including Panels, lb (kg)
Air-Cooled

Dual-Cool

Compressor Assembly

490 (223)

490 (223)

Blower and Electric Box Assembly
(Forward-Curved Fans)

510 (231)

510 (231)

Filter and Coil Assembly

520 (236)

670 (304)

Component

Source: DPN001172, Rev. 1

Liebert® DS™

40

Air-Cooled Systems

Figure 33

Dimensions—upflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressors with
centrifugal fans
Alternate Refrigerant
Piping Entrance
Note: Front air return unit shown. For
rear return unit, in addition to front service
area shown, also include 25" (635mm) on
one side of unit for access to rear return
filter box. See DPN001196.

33"
(838mm)
35"
(889mm)

3/4"
(19mm)
Bezels

TOP VIEW

High-Volt Connection(s)
1-1/2"
(38mm)

Low-Volt
Connection(s)

Minimum required
for blower replacement

86" (2184mm)

24"
(610mm)

76"
(1930mm)

Shaded area indicates a
recommended minimum
clearance for component
access.
2"
(51mm)

Table 28

34"
(864mm)

DPN001162
Rev. 2

85" (2159mm)

FRONT VIEW

Weights—upflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressors

Dry Weight, Approximate, lb (kg)
Model Type

Forward-Curved Fans

Air-Cooled

1830 (830)

Dual-Cool

1980 (898)

Source: DPN001162, Rev. 2

41

Liebert® DS™

Air-Cooled Systems

Figure 34

Primary connection locations—upflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic
compressors with centrifugal fans
All dimensions from
rear corner of unit
including panels X

22-1/2"
(572mm)

NOTES:
1. Drawing not to scale.
2. Tolerance on all piping dimensions
is ± 1/2" (13mm).
15-3/16"
3 Field-routed alternatives for refrigerant 35" (386mm)
gas and liquid line connection points.
(889mm)
4 See submittal page DPN001120 for
4"
blower outlet and deck dimensional data.
(102mm)

3

R2

ECR
ECS
HUM
CPD

0

Blower
Outlet
4

L1 L2 G1 G2

16-7/16"
(418mm)

3

Y

E1

LV1
LV2
LV3

E2

86" (2184mm)
TOP VIEW
6"
(152mm)
17-3/16"
(437mm)

R3
G1 G2

3

CGD *

3-7/8"
(98mm)

Table 29

R2

14-1/4"
(362mm)
15-7/8"
(403mm)
LEFT SIDE SECTION VIEW

20-1/16"
(509mm)

L1 L2

CGD *

Factory Location
FRONT SECTION VIEW
(Left Front Panel Not Shown)

DPN001114
Rev. 2

Piping data—upflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressors

Point
R1

Front of Unit

Description

3

Refrigerant Access (Top)

3

Refrigerant Access (Bottom)

X
in. (mm)

Y
in. (mm)

Connection Size / Opening
in. (mm)

60-11/16 (1542)

1-7/8 (48)

22-1/2 x 15-3/16 (572 x 386)

63 (1600)

13-13/16 (351)

16-7/16 x 4 (418 x 102)

L1

Liquid Line System 1

79-3/16 (2011)

16-3/4 (425)

1/2" Cu Sweat

L2

Liquid Line System 2

76-1/2 (1943)

16-3/4 (425)

1/2" Cu Sweat

G1

Hot Gas Discharge 1

73-7/8 (1876)

16-3/4 (425)

5/8" Cu Sweat

G2

Hot Gas Discharge 2

70-1/8 (1780)

16-3/4 (425)

5/8" Cu Sweat

R3

Refrigerant Access (Side)

—

—

6 x 17-3/16 (152 x 437)

CGD*

Condensate Gravity Drain

—

—

3/4" FPT

CPD

Condensate Pump Discharge (Opt)

56-1/4 (1429)

11-1/8 (283)

1/2" Cu Sweat

HUM

Humidifier Supply Line

56-1/4 (1429)

9-1/8 (233)

1/4" Cu Sweat

ECS**

Econ-O-Coil Supply

56 (1423)

7-5/16 (186)

1-5/8" Cu Sweat

3

ECR**

Econ-O-Coil Return

56 (1423)

4-1/2 (114)

1-5/8" Cu Sweat

E1

Electrical Conn. (High Volt)

52-3/8 (1330)

30" (762mm)

2-1/2"

E2

Electrical Conn. (High Volt)

46-7/8 (1191)

30" (762mm)

2-1/2"

LV1

Electrical Conn. (Low Volt)

19-1/2 (495)

29-1/16 (738)

7/8"

LV2

Electrical Conn. (Low Volt)

19-1/2 (495)

30-1/2 (775)

7/8"

LV3

Electrical Conn. (Low Volt)

19-1/2 (495)

31-15/16 (811)

7/8"

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
** Supplied on Dual-Cool systems only (four-pipe system)
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN001114, Rev. 2

Liebert® DS™

42

Air-Cooled Systems

Figure 35

Disassembly dimensions—upflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressors
with centrifugal fans

Blower & Electric
Box Assembly

31-1/4"
(794mm)

Compressor Assembly
76"
(1930mm)
Assembled\
Height

Filter & Coil
Assembly
76"
(1930mm)

45-13/16"
(1163mm)

33"
(838mm)

26"
(660mm)

85" (2159mm)
Assembled Length

59"
(1499mm)

NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.

Table 30

DPN001171
Rev. 1

Component weights—upflow, air-cooled, 28-42kW (8-12 ton), semi-hermetic compressors

Dry Weight, Approximate, Including Panels, lb (kg)
Air-Cooled

Dual-Cool

Compressor Assembly

800 (364)

800 (364)

Blower and Electric Box Assembly (Forward-Curved Fans)

510 (231)

510 (231)

Blower and Electric Box Assembly (EC Fans)

360 (163)

360 (163)

Filter and Coil Assembly

520 (236)

670 (304)

Component

Source: DPN001171, Rev. 1

43

Liebert® DS™

Air-Cooled Systems

Figure 36

Blower outlet and deck dimensions—upflow, air-cooled, 28-42kW (8-12 ton) with centrifugal
fans

73" (1854mm) or 86" (2184mm) Ref
E

Blower Outlet *

C

A

35"
(889mm)
Ref

B

Blower Outlet Location - Top View

Front of Unit

* Duct flange not provided

Top of Unit
Blower Deck
1-1/2"
(38mm)

D

76"
(1930mm)
Ref

Front or Rear Throw Air Supply
Table 31

DPN001120
Rev. 3

Blower outlet and deck dimensions—upflow, air-cooled, 28-42kW (8-12 ton)
Dimensional data, in. (mm)

Model

28-42kW
(8-12ton)

Blower
15 x 15
15 x 11

Supply

A

B

C

D

E

Front Throw

15-7/8 (404)

Rear Throw

15-7/8 (404)

18-5/8 (472)

2-1/8 (54)

25-5/8 (651)

25 (635)

18-5/8 (472)

11-5/8 (295)

25-5/8 (651)

25 (635)

Front Throw

15-7/8 (404)

14-1/2 (368)

2-1/8 (54)

25-5/8 (651)

25 (635)

Rear Throw

15-7/8 (404)

14-1/2 (368)

11-5/8 (295)

25-5/8 (651)

25 (635)

Source: DPN001120, Rev. 3

Liebert® DS™

44

Air-Cooled Systems

3.9

DIMENSIONS—LIEBERT DS 053-077, UPFLOW, AIR-COOLED MODELS

Figure 37

Dimensions—upflow, air-cooled, 53-77kw (15-22 ton), scroll or digital scroll compressors with
centrifugal fans
Alternate Refrigerant
Piping Entrance

Digital scroll compressors
not available on DS 077.

33"
(838mm)
35"
(889mm)

High-Volt Connection(s)
1-1/2"
(38mm)

3/4"
(19mm) Bezels

TOP VIEW

Minimum required
for blower replacement

Low-Volt
Connection(s)

98" (2489mm)
24"
(610mm)

76"
(1930mm)

34"
(864mm)
Shaded area indicates a
recommended minimum
clearance for component access.

97" (2464mm)

2"
(51mm)

FRONT VIEW

NOTE: Front air return unit shown. For rear return unit, in addition to front service
area shown, also include 25" (635mm) on one side of unit for access to rear
return filter box. See DPN001196.

Table 32

DPN001166
Rev. 2

Weights - upflow, air-cooled, 53-77kw (15-22 ton)—scroll or digital scroll compressors

Dry Weight, Approximate, lb (kg)
Model #
Compressor Type

053, 042

077 *

Scroll/Digital Scroll

Standard Scroll

Fan Type

Air-Cooled

Dual-Cool

Air-Cooled

Dual-Cool

Forward-Curved Blowers

2070 (939)

2250 (1021)

2070 (939)

2250 (1021)

* Digital scroll compressors not available on DS 077
Source: DPN001166, Rev. 2

45

Liebert® DS™

Air-Cooled Systems

Figure 38

Primary connection locations—upflow, air-cooled, 53-77kw (15-22 ton), scroll compressors
with centrifugal fans
Digital scroll compressors not
available on DS 077.

All dimensions from
rear corner of unit
including panels

12" (305mm)

NOTES:
1. Drawing not to scale.
4"
2. Tolerance on all piping dimensions
(102mm)
is ± 1/2" (13mm).
4"
3. Field-routed alternatives for refrigerant
35"
(102mm)
gas and liquid line connection points.
(889mm)
4. See submittal page DPN001191 for
12-13/16"
blower outlet and deck dimensional data.

Blower
Outlet

Blower
Outlet

(325mm)

6"
(152mm)

98" (2489mm)
Front of Unit

TOP VIEW OF UNIT
17-3/16"
(437mm)
14-1/4"
(362mm)

3-7/8"
(98mm)

15-7/8"
(403mm)

17-1/16"
(433mm)
Factory
Location

LEFT SIDE SECTION VIEW OF UNIT

FRONT SECTION VIEW OF UNIT
(Left Front Panel Not Shown)

DPN001213
Rev. 1

Table 33

Piping data - upflow, air-cooled, 53-77kw (15-22 ton)—scroll compressors ***

Point Description

X
in. (mm)

Y
in. (mm)

Connection Size / Opening, in. (mm)
12 x 4 (305 x 102)

R1

3

Refrigerant Access (Top)

83-5/8 (2124)

2 (51)

R2

3

Refrigerant Access (Bottom)

82-3/4 (2102)

14-3/4 (374)

12-3/16 x 4 (310 x 102)
53kW (15 ton) / 70 & 77kW (20 & 22 ton)

L1

Liquid Line System 1

94-11/16 (2405)

16-3/4 (425)

1/2" / 5/8" Cu Sweat

L2

Liquid Line System 2

91-7/8 (2334)

16-3/4 (425)

1/2" / 5/8" Cu Sweat

G1

Hot Gas Discharge 1

88-3/4 (2254)

16-3/8 (416)

7/8" / 1-1/8" Cu Sweat

G2

Hot Gas Discharge 2

85-9/16 (2173)

16-3/8 (416)

7/8" / 1-1/8" Cu Sweat

—

—

6 x 17-3/16 (152 x 437)

R3

3

Refrigerant Access (Side)

CGD* Condensate Gravity Drain

—

—

3/4" FPT

CPD

Condensate Pump Discharge (Opt)

79-5/16 (2015)

11-7/8 (302)

1/2" Cu Sweat

HUM

Humidifier Supply Line

79-5-16 (2015)

9-7/8 (251)

1/4" Cu Sweat

ECS

Econ-O-Coil Supply

78-5/8 (1998)

7-7/8 (200)

2-1/8" Cu Sweat

ECR

Econ-O-Coil Return

78-5/8 (1998)

4-5/8 (117)

2-1/8" Cu Sweat

E1

Electrical Conn. (High Volt)

75-3/8 (1915)

30 (762)

2-1/2"

E2

Electrical Conn. (High Volt)

69-7/8 (1775)

30 (762)

2-1/2"

LV1

Electrical Conn. (Low Volt)

19-1/2 (495)

29-1/16 (738)

7/8"

LV2

Electrical Conn. (Low Volt)

19-1/2 (495)

30-1/2 (775)

7/8"

LV3

Electrical Conn. (Low Volt)

19-1/2 (495)

31-15/16 (811)

7/8"

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory installed condensate trap. Do not
trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply with all
local codes.
** Supplied on dual-cool systems only.
*** Digital scroll compressors not available on DS 077
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN001213, Rev. 1

Liebert® DS™

46

Air-Cooled Systems

Figure 39

Disassembly dimensions—upflow, air-cooled, 53-77kw (15-22 ton), scroll or digital scroll
compressors with centrifugal fans
Digital scroll compressors
not available on DS 077.

Blower & Electric
Box Assembly

31-1/4"
(794mm)

Compressor Assembly
76"
(1930mm)
Assembled
Height

Filter & Coil
Assembly
76"
(1930mm)

45-13/16"
(1163mm)

33"
(838mm)

82" (2083mm)

15"
(381mm)

97" (2464mm) Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.
DPN001210
Rev. 1

Table 34

Component weights—upflow, air-cooled, 53-77kw (15-22 ton), scroll or digital scroll
compressors

Dry Weight, Approximate, Including Panels, lb (kg)
Model #
053, 070
Compressor
Component
Compressor Assembly
Blower and Electric Box Assembly
Forward-Curved Fans
Filter and Coil Assembly

077

Scroll/Digital Scroll

Standard Scroll *

Air-Cooled

Dual-Cool

Air-Cooled

Dual-Cool

540 (246)

540 (246)

540 (246)

540 (246)

770 (349)

770 (349)

770 (349)

770 (349)

760 (345)

940 (426)

760 (345)

940 (426)

* Digital scroll compressors not available on DS 077
Source: DPN001210, Rev. 1

47

Liebert® DS™

Air-Cooled Systems

Figure 40

Dimensions—upflow, air-cooled 53-77kw (15-22 ton), semi-hermetic compressors with
centrifugal fans
Alternate Refrigerant
Piping Entrance

33"
(838mm)
35"
(889mm)

3/4"
(19mm) Bezels

High-Volt Connection(s)
1-1/2"
(38mm)

TOP VIEW

Low-Volt
Connection(s)

Minimum required
for blower replacement

109" (2769mm)

24"
(610mm)

76"
(1930mm)

34"
(864mm)
2"
(51mm)

Shaded area indicates a
recommended minimum
clearance for component access.

108" (2743mm)

FRONT VIEW

NOTE: Front air return unit shown. For rear return unit, in addition to front service
area shown, also include 25" (635mm) on one side of unit for access to rear
return filter box. See DPN001196.

Table 35

DPN001165
Rev. 2

Weights—upflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic compressors

Dry weight, including panels, lb. (kg)
053

070, 077

Model Type

Air-Cooled

Dual-Cool

Air-Cooled

Dual-Cool

Forward-Curved Fans

2350 (1069)

2530 (1150)

2500 (1134)

2680 (1216)

Source: DPN001165, Rev. 2

Liebert® DS™

48

Air-Cooled Systems

Figure 41

Primary connection locations—upflow air-cooled 53-77kW (15-22 ton), semi-hermetic
compressors with centrifugal fans
All dimensions from
rear corner of unit
including panels

22-1/2"
(572mm)

NOTES:
15-3/16"
1. Drawing not to scale.
35"
(386mm)
2. Tolerance on all piping dimensions
(889mm)
is ± 1/2" (13mm).
4"
3. Field-routed alternatives for refrigerant
(102mm)
gas and liquid line connection points.
4. See submittal page DPN001191 for
blower outlet and deck dimensions.

Blower
Outlet

X

O

Blower
Outlet

16-7/16"
(418mm)

Y

6"
(152mm)

109" (2769mm)

TOP VIEW OF UNIT

Front of Unit

17-3/16"
(437mm)

3-7/8"
(98mm)

14-1/4"
(362mm)

20-1/16"
(509mm)

15-7/8"
(403mm)

CGD *

LEFT SIDE SECTION VIEW OF UNIT

Table 36

DPN001212
Rev. 2

Piping data—upflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic compressors

Point

Description

R1

3

Refrigerant Access (Top)

3

Refrigerant Access (Bottom)

R2

Factory Location

FRONT SECTION VIEW OF UNIT
(Left Front Panel Not Shown)

X
in. (mm)

Y
in. (mm)

Connection Size / Opening
in. (mm)

83-3/4 (2127)

1-7/8 (48)

22-1/2 x 15-3/16 (572 x 386)

86 (2184)

13-7/8 (352)

16-7/16 x4 (418 x102)

53kW (15 ton) / 70 & 77kW (20 & 22 ton)
L1

Liquid Line System 1

97 (2464)

16-3/4 (425)

1/2" / 5/8" Cu Sweat

L2

Liquid Line System 2

93-5/16 (2370)

16-3/4 (425)

1/2" / 5/8" Cu Sweat

G1

Hot Gas Discharge 1

90-5/8 (2302)

16-5/8 (422)

7/8" / 1-1/8" Cu Sweat

G2

Hot Gas Discharge 2

88 (2235)

16-5/8 (422)

7/8" / 1-1/8" Cu Sweat

Refrigerant Access (Side)

—

—

6 x 17-3/16 (152 x 437)

CGD*

Condensate Gravity Drain

—

—

3/4 FPT

CPD

Condensate Pump Discharge (Opt)

79-5/16 (2015)

11-7/8 (302)

1/2" Cu Sweat

HUM

Humidifier Supply Line

79-5/16 (2015)

9-7/8 (251)

1/4" Cu Sweat

ECS

Econ-O-Coil Supply

78-5/8 (1998)

7-7/8 (200)

2-1/8" Cu Sweat

ECR

Econ-O-Coil Return

78-5/8 (1998)

4-5/8 (117)

2-1/8" Cu Sweat

E1

Electrical Conn. (High Volt)

75-3/8 (1915)

30 (762)

2-1/2"

E2

Electrical Conn. (High Volt)

69-7/8 (1775)

30 (762)

2-1/2"

LV1

Electrical Conn. (Low Volt)

19-1/2 (495)

29-1/16 (738)

7/8"

LV2

Electrical Conn. (Low Volt)

19-1/2 (495)

30-1/2 (775)

7/8"

LV3

Electrical Conn. (Low Volt)

19-1/2 (495)

31-15/16 (811)

7/8"

R3

3

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory installed condensate trap. Do not
trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply with all
local codes.
** Supplied on dual-cool systems only.
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN001212, Rev. 2

49

Liebert® DS™

Air-Cooled Systems

Figure 42

Disassembly dimensions—upflow, air-cooled, 53-77kW (15-22 ton), semi-hermetic
compressors with centrifugal fans

Blower & Electric
Box Assembly

31-1/4"
(794mm)

Compressor Assembly

76" (1930mm)
Assembled Height
Filter & Coil
Assembly
76"
(1930mm)
45-13/16"
(1163mm)

33"
(838mm)

26"
(660mm)

82" (2083mm)
108" (2743mm)
Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.

Table 37

DPN001209
Rev. 1

Component weights—upflow air-cooled 53-77kw (15-22 ton), semi-hermetic compressors
Dry Weight, Approximate, Including Panels, lb (kg)
Air-Cooled

Dual-Cool

Compressor Assembly

970 (441)

970 (441)

Blower and Electric Box Assembly
Forward-Curved Fans

770 (349)

770 (349)

Filter and Coil Assembly

760 (345)

940 (426)

Component

Source: DPN001209, Rev. 1

Liebert® DS™

50

Air-Cooled Systems

Figure 43

Blower outlet and deck dimensions—upflow 53-77kW (15-22 ton) with centrifugal fans

98" (2449mm) or 109" (2769mm)
F
E
Blower Outlets *

C

A

A

35"
(889mm)
Ref

B

B

Blower Outlet Location - Top View

Front of Unit

* Duct flanges not provided.

Top of Unit
Blower Deck
D

1-1/2"
(38mm)

76"
(1930mm)
Ref.

Front or Rear Air Throw Supply
Table 38

DPN001191
Rev. 6

Blower outlet and deck dimension—upflow, 53-77kW (15-22 ton)
Dimensional Data, in. (mm)

Models

53-77kW
(15-22 ton)

Blower

15 x 15
15 x 11

B

C

Front Throw 15-7/8 (404)

Supply

A

18-5/8 (472)

2-1/8 (54)

Rear Throw 15-7/8 (404)

18-5/8 (472)

Front Throw 15-7/8 (404) 14-11/16 (373)

D

E

F

25-5/8 (651) 27-3/4 (705)

55-1/2 (1410)

11-5/8 (295) 25-5/8 (651) 27-3/4 (705)

55-1/2 (1410)

2-1/8 (54)

25-5/8 (651) 31-3/8 (797) 58-7/16 (1484)

Rear Throw 15-7/8 (404) 14-11/16 (373) 11-5/8 (295) 25-5/8 (651) 31-3/8 (797) 58-7/16 (1484)

Source: DPN001191, Rev. 6

51

Liebert® DS™

Air-Cooled Systems

3.10

DIMENSIONS—LIEBERT DS 105, UPFLOW, AIR-COOLED MODELS

Figure 44

Dimensions—upflow, air-cooled, 105kW (30 ton), semi-hermetic and scroll compressors with
centrifugal fans
Alternate Refrigerant
Piping Entrance

Digital scroll compressors
not available on 105 models.

33"
(838mm)
35"
(889mm)

3/4"
(19mm)
Bezels

High-Volt Connection(s)

Low-Volt Connection(s)

TOP VIEW
1-1/2"
(38mm)

Minimum required
for blower replacement

132" (3353mm)

24"
(610mm)

76"
(1930mm)

34"
(864mm)
2"
(51mm)

Shaded area indicates a
recommended minimum
clearance for component
access.

131" (3327mm)

FRONT VIEW
Note: Front air return unit shown. For rear return unit, in addition to front
service area shown, also include 25" (635mm) on one side of unit
for access to rear return filter box. See DPN001196.

Table 39

DPN001168
Rev. 1

Weights—upflow, air-cooled, 105kW (30 ton), semi-hermetic and scroll compressors *

Dry Weight, Approximate, lb (kg)

Semi-Hermetic
Fan Type
Forward-Curved Fans

Scroll

Air-Cooled

Dual-Cool

Air-Cooled

Dual-Cool

3000 (1361)

3330 (1510)

2880 (1306)

3210 (1456)

* Digital scroll compressors not available on DS 105.
Source: DPN001168, Rev. 1

Liebert® DS™

52

Air-Cooled Systems

Figure 45

Primary connection locations—upflow, air-cooled, 105kW (30 ton), semi-hermetic and scroll
compressors with centrifugal fans

Digital scroll compressors not
available on 105 models.

All dimensions from
rear corner of unit
including panels

22-1/2"
(572mm)

35"
(889mm)

15-3/16"
(386mm)

4"
(102mm)

R2

ECR
ECS
HUM
CPD

Blower
Outlet

Blower
Outlet

16-7/16"
(418mm)

NOTES:
1. Drawing not to scale.
2. Tolerance on all piping dimensions
is ± 1/2" (13mm).
3. Field routed alternatives for refrigerant
gas and liquid line connection points.
4. See submittal page DPN001192 for
blower outlet and deck dimensional data.

O

X

Blower
Outlet

LV1 LV3
LV2

E1 E2

Y
LV4

132" (3353mm)

TOP VIEW

Front Of Unit

6"
(152mm)
R3
20-1/16"
(509mm)

17-3/16"
(437mm)
3-7/8"
(98mm)

G2
L1 L2G1

CGD*
14-1/4"
(362mm)
15-7/8"
(403mm)

CGD*
Factory Location

FRONT SECTION VIEW
(Left Front Panel Not Shown)

LEFT SIDE SECTION VIEW

Table 40
Point
R1
R2

3

DPN001257
Rev. 0

Piping data—upflow, air-cooled 105kW (30 ton), semi-hermetic and scroll compressors ***
X, in. (mm)

Y, in. (mm)

Connection Size / Opening

Refrigerant Access (Top)

106-7/8 (2715)

1-7/8 (48)

22-1/2 x 15-3/16 (572 x 386)

Description
Refrigerant Access (Bottom)

109-1/8 (2772)

13-7/8 (352)

16-7/16 x 4 (418 x 102)

L1

Liquid Line System 1

121-3/4 (3092)

16-3/4 (425)

5/8" Cu Sweat

L2

Liquid Line System 2

118-1/8 (3000)

16-3/4 (425)

5/8" Cu Sweat

G1

Hot Gas Discharge 1

118-1/4 (3004)

14-1/4 (362)

1-1/8" Cu Sweat

G2

Hot Gas Discharge 2

115-5/8 (2937)

14-1/4 (362)

1-1/8" Cu Sweat

R3

3

Refrigerant Access (Side)

—

—

6 x 17-3/16 (152 x 437)

CGD*

Condensate Gravity Drain

—

—

3/4" FPT

CPD

Condensate Pump Discharge (Opt)

102-3/8 (2600)

13-5/8 (346)

1/2" Cu Sweat

HUM

Humidifier Supply Line

101-1/8 (2569)

13-1/8 (333)

1/4" Cu Sweat

ECS**

Econ-O-Coil Supply

101-1/8 (2569)

10-1/4 (260)

2-5/8" Cu Sweat

ECR**

Econ-O-Coil Return

101-1/8 (2569)

5-1/4 (133)

2-5/8" Cu Sweat

E1

Electrical Conn. (High Volt)

98-1/2 (2502)

30 (762)

2-1/2"

E2

Electrical Conn. (High Volt)

93 (2362)

30 (762)

2-1/2"

LV1

Electrical Conn. (Low Volt)

41-1/8 (1045)

30-3/8 (772)

7/8"

LV2

Electrical Conn. (Low Volt)

38-7/8 (987)

30-3/8 (772)

7/8"

LV3

Electrical Conn. (Low Volt)

35-1/8 (892)

30-3/8 (772)

7/8"

LV4

Electrical Conn. (Low Volt)

31-5/8 (803)

30-3/8 (772)

7/8"

3

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do not
trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply with all
local codes.
** Supplied on dual-cool systems only.
*** Digital scroll compressors not available on DS 105
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN001257, Rev. 0

53

Liebert® DS™

Air-Cooled Systems

Figure 46

Disassembly dimensions—upflow, air-cooled, 105kW (30 ton), standard scroll compressors
with centrifugal fans

Digital scroll compressors
not available on DS 105.

Blower & Electric
Box Assembly

31-1/4"
(794mm)

Compressor
Assembly
76"
(1930mm)
Assembled
Height

Filter & Coil Assembly

76"
(1930mm)
45-13/16"
(1164mm)

33"
(838mm)

26"
(660mm)

105"
(2667mm)
131" (3327mm
Assembled Length

NOTE: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.

Table 41

DPN001255
Rev. 1

Component weights—upflow, air-cooled, 105kW (30 ton), standard scroll compressors *
Dry Weight, Approximate, Including Panels, lb (kg)
Air-Cooled

Dual-Cool

Compressor Assembly

830 (376)

830 (376)

Blower and Electric Box Assembly
Forward-Curved Fans

1080 (490)

1080 (490)

Filter and Coil Assembly

970 (440)

1300 (590)

Component

*Digital scroll compressors not available on DS 105
Source: DPN001255, Rev. 1

Liebert® DS™

54

Air-Cooled Systems

Figure 47

Disassembly dimensions—upflow, air-cooled, 105kW (30 ton), semi-hermetic compressors
with centrifugal fans

Blower & Electric
Box Assembly

31-1/4"
(794mm)

Compressor
Assembly

Filter & Coil
Assembly

76"
(1930mm)
Assembled
Height

76"
(1930mm)
45-13/16"
(1164mm)

33"
(838mm)

26"
(660mm)

105" (2667mm)
131" (3327mm
Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.

Table 42

DPN001254
Rev. 1

Component weights—upflow, air-cooled, 105kW (30 ton), semi-hermetic compressors
Dry Weight, Approximate, Including Panels, lb (kg)
Air-Cooled

Dual-Cool

Compressor Assembly

950 (431)

950 (431)

Blower and Electric Box Assembly
Forward-Curved Fans

1080 (490)

1080 (490)

Filter and Coil Assembly

970 (440)

1300 (590)

Component

Source: DPN001254, Rev. 0

55

Liebert® DS™

Air-Cooled Systems

Figure 48

Blower outlet and deck dimensions—upflow 105kW (30 ton), with centrifugal fans

132" (3353mm)
G
Blower Outlets *

F
E

A

A

A
35"
(889mm)
Ref

B

B

B

C

BLOWER OUTLET LOCATION - TOP VIEW

Front of Unit

* Duct flanges not provided

TOP OF UNIT
Blower Deck
1-1/2"
(38mm)

76"
(1930mm)
Ref

DPN001192
Rev. 1

Front or Rear Throw Air Supply
Table 43

Blower outlet and deck dimension—upflow 105kW (30 ton), with centrifugal fans
Dimensional Data, in. (mm)

Blower
15 x 11

SUPPLY

A

B

Front Throw 15-7/8 (404) 14-11/16 (373)

C

D

2-1/8 (54)

E

F

G

25-5/8 (651) 30-3/4 (781) 54-1/2 (1384) 78-1/8 (1984)

Rear Throw 15-7/8 (404) 14-11/16 (373) 11-5/8 (295) 25-5/8 (651) 30-3/4 (781) 54-1/2 (1384) 78-1/8 (1984)

Source: DPN001192, Rev. 1

Liebert® DS™

56

Air-Cooled Systems

3.11

HEAT REJECTION—LIEBERT MC, FIN/TUBE AND PIGGYBACK CONDENSERS

3.11.1 Liebert MC Microchannel Condensers
Liebert MC Condenser Selection
Table 44

Traditional open room (75°F/45RH return air conditions)
Outdoor Design Ambient Temperature

Model #

95°F (35°C)

100°F (38°C)

105°F (41°C)

110°F (43°C)

115°F (46°C)

120°F (49°C)

DS/VS028A

MCM080_8

MCM080_8

MCM080_8

MCL110_8

MCL110_8

MCL110_8

DS/VS035A

MCM080_8

MCM080_8

MCM080_8

MCL110_8

MCL110_8

MCL110_8

DS/VS042A

MCM080_8

MCM080_8

MCL110_8

MCL110_8

MCL110_8

MCL110_8

DS/VS053A

MCM080_8

MCM080_8

MCL110_8

MCM160_8

MCM160_8

MCL220_8

DS/VS070A

MCM080_8

MCL110_8

MCL110_8

MCM160_8

MCM160_8

MCL220_8

DS/VS077A

MCM080_8

MCL110_8

MCL110_8

MCM160_8

MCM160_8

MCL220_8

DS/VS105A

MCL110_8

MCM160_8

MCM160_8

MCL220_8

MCL220_8

MCL220_8

Table 45

High-temperature return (85°F/33RH return air conditions)
Outdoor Design Ambient Temperature

Model #

95°F (35°C)

100°F (38°C)

105°F (41°C)

110°F (43°C)

115°F (46°C)

120°F (49°C)

DS/VS028A

MCM080_8

MCM080_8

MCL110_8

MCL110_8

MCL110_8

MCM160_8

DS/VS035A

MCM080_8

MCM080_8

MCL110_8

MCL110_8

MCM160_8

MCM160_8

DS/VS042A

MCM080_8

MCL110_8

MCL110_8

MCM160_8

MCM160_8

MCM160_8

DS/VS053A

MCL110_8

MCL110_8

MCM160_8

MCL220_8

MCL220_8

MCL220_8

DS/VS070A

MCL110_8

MCM160_8

MCM160_8

MCL220_8

MCL220_8

MCL220_8

DS/VS077A

MCL110_8

MCM160_8

MCM160_8

MCL220_8

MCL220_8

MCL220_8

DS/VS105A

MCM160_8

MCL220_8

MCL220_8

MCL220_8

MCL220_8

—

Table 46

™

Traditional open room (75°F/45RH return air conditions) Liebert QuietLine

sound levels

Outdoor Design Ambient Temperature

Liebert DS
Model #

95°F (35°C)

100°F (38°C)

105°F (41°C)

110°F (43°C)

115°F (46°C)

DS/VS028A

MCM080E8

MCM080E8

MCL110E8

MCL110E8

MCL110E8

DS/VS035A

MCM080E8

MCL110E8

MCL110E8

MCM160E8

MCM160E8

DS/VS042A

MCM080E8

MCL110E8

MCL110E8

MCM160E8

MCM160E8

DS/VS053A

MCL110E8

MCL110E8

MCM160E8

MCL220E8

MCL220E8

DS/VS070A

MCL110E8

MCM160E8

MCL220E8

MCL220E8

MCL220E8

DS/VS077A

MCL110E8

MCM160E8

MCL220E8

MCL220E8

MCL220E8

DS/VS105A

MCM160E8

MCL220E8

Consult Factory

57

Liebert® DS™

Air-Cooled Systems
™

Dimensions—Liebert MC
Figure 49

Condensers

Condenser planning dimensions—MCM080, MCM160 with/without Liebert Lee-Temp™
46-1/4"
(1175mm)
Emerson recommends a clearance of
36" (915mm) on each side for proper
operation and component access.

H
G

B
Height to Top
of Fan Guard

A

F

Eyebolts for lifting
condenser provided
on four-fan models

C
15-1/4"
387mm

46-1/4"
(1175mm)

G
B
Height to Top
of Fan Guard

A

For dual
circuit only

46"
(1168mm)

H
15-1/4"
387mm

F

46-5/16"
(1177mm)

One-Fan
Condenser

Electric Box End

C
39-5/16"
(999mm)
44-3/8"
(1127mm)

46"
(1168mm)
ANCHOR PLAN
E

D

Leg supplied for
each Liebert
Lee-Temp kit on
2- & 4-fan models

Provided On
Four-Fan Models

DPN002172, Rev 3
DPN002189, Rev. 4

Electric Box End

ANCHOR PLAN
(One-Fan Condenser)

39-5/16"
(999mm)
44-3/8"
(1127mm)

46-5/16"
(1177mm)

Liebert
Model No.

No. of
Fans

A
in. (mm)

B
in. (mm)

C
in. (mm)

D
in. (mm)

E
in. (mm)

MCM080

2

105-1/4
(2674)

—

96-1/16
(2440)

94-7/16
(2398)

—

18
(457)

31-5/8
(803)

39-5/8
(1006)

MCM160

4

202-7/16
(5142)

113-1/2
(2883)

192-1/4
(4883)

94-7/16
(2398)

96-3/16
(2444)

36
(914)

49-5/8
(1260)

57-5/8
(1464)

48
(1219)

61-5/8
(1565)

69-5/8
(1768)

60
(1524)

73-5/8
(1870)

81-5/8
(2073)

* Cross bracing required for legs longer than 18". Number of legs varies per model and options selected.
Source: DPN002172, Rev. 3; DPN002189, Rev4

Liebert® DS™

58

Leg Height
G
H
F* in. (m.) in. (mm) in. (mm)

Air-Cooled Systems

Figure 50

Cabinet and anchor dimensions—Liebert MC
Temp receivers

™

models MCL110 and MCL220 with Liebert Lee-

Emerson recommends a clearance of
36" (915mm) on each side for proper
operation and component access.

55-5/8"
(1413mm)

Eyebolts for lifting condenser
provided on 3&4 fan models

Height
to Top
of Fan
Guard

15-1/4"
(387mm)
For
55-1/2" Dual-Circuit
(1409mm)
Only

15-1/4"
(387mm)

Provided on
3- & 4- Fan
Models

(1) leg supplied for
each Liebert
Lee-Temp
kit on 2, 3, & 4
fan models

Electric Box End

D

E

48-3/4"
(1239mm)
53-7/8"
(1368mm)

DPN002415
Rev. 3

54-3/8"
(1381mm)

ANCHOR PLAN
Model
No

No. of
Fans

A
in. (mm)

B
in. (mm)

C
in. (mm)

D
in. (mm)

E
in (mm)

Leg
Height
F* in. (m.)

MCL110

2

124 1/8
(3152)

—

112-1/8
(2848)

110-1/2
(2806)

—

MCL220

4

236-5/16
(6003)

129-9/16
(3291)

224-3/8
5699)

110-1/2
(2806)

112-1/4
(2851)

* Cross bracing required for legs longer than 18". Number of legs varies per model and
options selected.
Source: DPN002415, Rev. 3

59

G
in. (mm)

H
in. (mm)

18 (457)

35-7/8
(911)

43-5/8
(1108)

36 (914)

53-7/8
(1368)

61-5/8
(1565)

48 (1219)

65-7/8
(1673)

73-5/8
(1870)

60 (1524)

77-7/8
(1978)

85-5/8
(2175)

Liebert® DS™

Air-Cooled Systems

Figure 51

Condenser planning dimensions—MCL110 and MCL220

55-5/8"
(1413mm)

Height to Top
of Fan Guard

Eyebolts for lifting condenser
provided on 3&4 fan models

Emerson recommends a clearance of
36" (915mm) on each side for proper
operation and component access.

55-1/2"
(1409mm)

ANCHOR PLAN
E

53-7/8"
(1368mm)
48-3/4"
(1239mm)

Electric Box End

D

Provided on
3- & 4- Fan Models

DPN002416
Rev. 2
Model #

# of
Fans

A
in. (mm)

B
in. (mm)

C
in. (mm)

D
in. (mm)

E
in. (mm)

Leg Height
F * In. (mm)

G
In. (mm)

H
In. (mm)

MCL110

2

124-1/8
(3152)

—

112-1/8
(2848)

110-1/2
(2806)

—

18 (457)

35-7/8
(911)

43-5/8
(1108)

MCL220

4

236-5/16
(6003)

129-9/16
(3291)

224-3/8
(5699)

110-1/2
(2806)

112-1/4
(2851)

36 (914)

53-7/8
(1368)

61-5/8
(1565)

56-1/8
(1425)

48 (1219)

65-7/8
(1673)

73-5/8
(1870)

* 18" legs standard for all models. Cross-bracing required for legs longer than 18" (457mm). Number varies according to model and options.
Source: DPN002416, Rev. 2

Liebert® DS™

60

Air-Cooled Systems

Figure 52

Typical Liebert MC

™

condenser footprint—dimensions

13/16"
21mm
2-1/2"
(64mm)

3-5/8"
(93mm)
1-7/8" (48mm)

2-1/2"
(64mm)

3-5/8"
(93mm)

1/2"x1"
(12.7mm x 25.4mm)
Obround
1-7/8"
(48mm)

61

Liebert® DS™

Air-Cooled Systems

Electrical Data—Liebert MC™ Condensers
Table 47

Liebert MC electrical data, three-phase, 60Hz condenser, Premium Version (EC control)
Power Requirements
FLA

WSA

OPD

Model #

Number
of Fans

208/230V

380/415V

460V

208/230V

380/415V

460V

208/230V

380/415V

460V

MCM080

2

4.6

2.8

2.8

5.5

3.3

3.3

15

15

15

MCM160

4

9.2

5.6

5.6

9.8

6.0

6.0

15

15

15

MCL110

2

11.4

5.6

5.6

12.8

6.3

6.3

15

15

15

MCL220

4

22.8

11.2

11.2

24.2

11.9

11.9

25

15

15

1.
2.

FLA = Full Load Amps; WSA = Wire Size Amps; OPD = Maximum Overcurrent Protection Device.
208V–460V premium models must be connected to Wye 3-phase systems.

Electrical Field Connections—Liebert MC Condensers
Figure 53

Electrical field connections—Liebert MC Condensers premium efficiency control, with and
without Liebert Lee-Temp
Fan 2
Fan 1

Fan 2

Lee-Temp receiver tank (1 per circuit).
NOTE: Standard heater pads are 150 watt each.
(Optional 300 watt heater pads are available.)
Standard heater pad voltage is 230V.
(120V heater pad voltage is optional.)
Electrical Connection
Box with Cover
Fan 1
Electrical service connection. Pigtails in electric
handy box are factory-wired to Liebert Lee-Temp
heater pads for field-connection of separate
continuous electric source; wire not by Liebert

1
5A
5B
6
4
7

2
3

5C

8
10

9

DPN002169
Rev. 3
DPN002374
Pg. 2, Rev. 1

Liebert® DS™

62

See Electrical Connections—Premium
Efficiency Control, Liebert MC Condensers on
page 63 for key to numbered components

Air-Cooled Systems

Electrical Connections—Premium Efficiency Control, Liebert MC Condensers
Key Electrical Details; Source: DPN002169, Rev. 3 and DPN002374 Rev. 2
1. Three-phase electrical service—Terminals are on top of disconnect switch for one-fan and
two-fan units. Terminals are on bottom of disconnect switch for three-fan and four-fan units.
Three-phase service not by Emerson. See Note 5.
2. Earth ground—Field lug terminal for earth ground connection. Ground terminal strip for fan
motor ground connection.
3. Primary high voltage entrance—Three 7/8" (22.2mm) diameter knockouts located at the
bottom of the enclosure.
4. SPD field connection terminals—High-voltage surge protection device (SPD) terminals. SPD
is an optional device.
5. CANbus terminal connections—Field terminals for CANbus cable connection.
• 5A is the CANbus connectors
• TB49-1 is the input terminal for CANbus high
• TB49-3 is the input terminal for CANbus low
• TB50-1 is output terminal for CANbus high
• TB50-3 is the output terminal for CANbus low
• Each CANbus cable shield is connected to terminal “SH”, Item 9.
• 5B is the “END OF LINE” jumper.
• 5C is the CANbus “DEVICE ADDRESS DIP SWITCH”. CANbus cable not by Emerson. See Note 2.
6. Remote unit shutdown—Replace exiting jumper between terminals TB38-1 and TB38-2 with
field-supplied normally closed switch having a minimum 75VA 24VAC rating. Use field-supplied
Class 1 wiring.
7. Alarm terminal connections
a. Common Alarm Relay indicates when any type of alarm occurs. TB74-1 is common; TB74-2 is
normally open; and TB74-3 is normally closed. 1 Amp 24VAC is the maximum load. Use
field-supplied Class 1 wiring.
b. Shutdown Alarm Relay indicates when condenser loses power or when a critical alarm has
occurred that shuts down the condenser unit. TB74-4 is common, TB74-5 is normally open
and TB74-6 is normally closed. 1 Amp 24VAC is the maximum load. Use field-supplied
Class 1 wiring.
8. Indoor unit interlock and SPD alarm terminals
a. On any call for compressor operation, normally open contact is closed across Terminals 70 &
71 for Circuit 1, and normally open contact is closed across Terminals 70 & 230 for Circuit 2
from indoor room unit.
b. During SPD alarm, normally open contact is closed across Terminals 12 &13. SPD is an
optional device.
9. CANbus shield terminal—Terminal for field connection of the CANbus field-supplied cables.
Shield of CANbus field-supplied cables must not be connected to ground at the condenser.
10. Primary low voltage entrance—One 7/8" (22.2mm) diameter knockout that is free for
customer low-voltage wiring.

63

Liebert® DS™

Air-Cooled Systems

NOTES
1. Refer to specification sheet for unit voltage rating, full load amp and wire size amp ratings.
2. The CANbus wiring is field supplied and must be:
• shielded
• 22-18AWG stranded tinned copper,
• twisted pair (minimum 8 twists per foot),
• low capacitance (15pf/ft or less),
• plenum rated (NEC type CMP) if required by local codes,
• UV and moisture resistant or run within conduit once in an outdoor environment, and
• must be temperature and voltage rated for conditions present.
Examples: Belden part number 89207(plenum rated) or Alpha Wire part number 6454
(UV resistant outdoor rated) Category 5, 5e or higher.
3. Do not run the CANbus cable in the same conduit, raceway, or chase as high voltage.
4. For CANbus network lengths greater than 350ft. (107m), contact Liebert factory.
5. All wiring must be sized and selected for insulation case per NEC and other local codes.
6. The electrically commutated (EC) motors included in the Liebert MC condensers are suitable for
connection to power supplies with a solidly grounded neutral. (Some platforms can accept power
supplies listed under Item b below. Contact the factory for more information.)
a. Acceptable power supplies for 208 to 480V nominal units
• 208V wye with solidly grounded neutral and 120V line to ground;
• 380V wye with solidly grounded neutral and 220V line to ground;
• 480V wye with solidly grounded neutral and 277V line to ground.
b. Unacceptable power supplies for 208V to 480V nominal units:
• wye with high resistance (or impedance) ground;
• delta without ground or with floating ground;
• delta with corner ground; or
• delta with grounded center tap

Liebert® DS™

64

Air-Cooled Systems

3.12

PIPING—LIEBERT MC™ CONDENSERS

Typical System Configurations—LIEBERT MC CONDENSERS
Figure 54 shows a single refrigeration circuit diagram, displaying the indoor air conditioning unit,
the outdoor condenser (with or without Liebert Lee-Temp™) and field-supplied interconnection piping.
Figure 54

Liebert MC piping schematic with and without Liebert Lee-Temp

Check Valve
Relief Valve

Service
Valve Liquid Return

Head Pressure
Liebert Lee-Temp Receiver Control Valve

Condenser
Coil

Optional Field-Installed
Fusible Plug

Condenser
Coil
Hot Gas Discharge

Liebert Lee-Temp
Liquid
Sensing
Bulb

Evaporator
Coil

For rises over 25ft. (7.6m),
trap every 20ft. (6m) or at
evenly divided distances*

Suction
Service
Valve

Field installed relief valve(s) required
for 50Hz EU CE units

Service

Check
Valve
Valve Compressor

External
Equalizer
*Isolation
Valve
Hot Gas Discharge

Expansion Solenoid
Valve
Valve

Sight
Glass

Liquid Line

Filter Drier

Refrigerant Piping
Field Piping
Service/Schrader (Access) Connection No Valve Core
Service/Schrader (Access) Connection With Valve Core

* Components are not supplied by
Liebert but are recommended for
proper circuit operation and
maintenance

NOTES
Single refrigeration circuit shown for clarity.
Schematic representation shown. Do not use for specific connection locations.

65

*Isolation
Trap at base of risers
Valve
over 5ft. (1.5m)*

DPN002188
Rev. 1

Liebert® DS™

Air-Cooled Systems
™

Figure 55 Piping dimensions—Liebert MC

™

dual circuit condensers with Liebert Lee-Temp

Hot Gas Line
To Condenser
Entering Hot
Gas Line

Metal Clamp

Isolator
Detail AA

Position elbow to
direct relief valve
downward

B View

Fasten hot gas line to cabinet
using flat surface clamps with
isolators (field-supplied)
Inverted traps in refrigerant
See Detail A A
lines are internal to

Liquid Line
From Condenser

Leaving
Liquid Line

the condenser. Do not trap
external to the unit.

Hot Gas Line
To Condenser

Liebert-supplied piping assembly
will include one or two valve and check
valves, depending on condenser
capacity and refrigerant

GENERAL ARRANGEMENT

R407C 2 and 4 Fan
Piping Assembly
Leaving
Liquid Line

R410A 2 Fan
Piping Assembly

R410A 4 Fan
Piping Assembly

Liquid Line
From Condenser

Field Piping

Position elbow to
direct relief valve
downward

C View

Entering Hot
Gas Line

Note:
1. The following materials are supplied by Emerson for each circuit (shipped loose with condenser)
for field installation: insulated Liebert Lee-Temp storage tank with sight glasses, head pressure control
valve, check valve, rotalock valve and pressure relief valve. All other piping to be supplied and installed by others.
2. Consult factory for proper line sizing for runs longer than 150ft. (45.7m) equivalent length.

DPN002426
Rev. 4

Table 48

Piping dimensions—Liebert MC dual circuit condensers with Liebert Lee-Temp
Condenser Connections
ODS, in.

Liebert Lee-Temp Connections

Liquid

Hot Gas Tee
IDS, in.

Liquid Line
to Lee-Temp Valve
ODS, In.

Receiver Out
R407C
IDS, in.

Receiver Out
R410A
IDS, in.

7/8

5/8

7/8

5/8

5/8

5/8

2

1-1/8

7/8

1-1/8

7/8

7/8

7/8

MCM160

2

1-1/8

7/8

1-1/8

7/8

1-1/8

1-1/8

MCL220

2

1-3/8

1-1/8

1-3/8

1-1/8

1-1/8

1-1/8

Model #

Circuit
No.

Hot Gas

MCM080

2

MCL110

Source: DPN002426, Rev. 4

Liebert® DS™

66

Air-Cooled Systems

Figure 56 Piping connections—Liebert MC

™

dual circuit two-fan and four-fan units

Vertical

Leaving Liquid
Line

Inverted traps in refrigerant
lines are internal to
the condenser. Do not trap
external to the unit.

Horizontal

Circuit #1

Entering Hot
Gas Line

Circuit #2
Field Piping

Optional fusible plug service kit to
be brazed into the liquid line(s) in
either the vertical or horizontal
position. (where required)
(vertical position is preferred,
horizontal position is optional.)
for two circuit systems, one
fusible plug kit will need to
be installed in each circuit.

Table 48

DPN002425
Rev. 3

Liebert MC piping connection sizes—Liebert MC dual-circuit, two-fan and four-fan units
Connection Sizes, OD, in

Model #

# of
Fans

Hot Gas Line

Liquid Line

MCM080

2

7/8

5/8

MCL110

2

1-1/8

7/8

MCM160

4

1-1/8

7/8

MCL220

4

1-3/8

1-1/8

Source: DPN002425, Rev. 3

67

Liebert® DS™

Air-Cooled Systems

3.12.1 Fin/Tube Condensers
Fin/Tube Selections
Table 49

Liebert DS air-cooled condenser selection, finned-tubular design, R-407C
Ambient Temperature °F (°C)
Outdoor Condenser

Outdoor Quiet-Line Condenser

Liebert DS
Model

95 (35)

100 (38)

105 (41)

95 (35)

100 (38)

105 (41)

028

CD*-205

CD*-205

CD*-251

CD*-214

CD*-214

CD*-286

035

CD*-205

CD*-205

CD*-251

CD*-214

CD*-214

CD*-286

042

CD*-205

CD*-251

CD*-308

CD*-286

CD*-286

CD*-409

053

CD*-251

CD*-308

CD*-415

CD*-286

CD*-409

CD*-409

070

CD*-308

CD*-415

CD*-415

CD*-409

CD*-477

CD*-572

077

CD*-308

CD*-415

CD*-616

CD*-409

CD*-572

CD*-572

105

CD*-415

CD*-616

CD*-616

CD*-572

N/A

N/A

Dimensions—Fin/Tube Condensers
Table 50

Fin/tube condenser physical data and R-407C refrigerant required per condenser circuit
Dual Circuit
lb/circuit (kg/circuit)

Connection Size, OD, In.
Model
Number

Number
of Fans

Standard Models
CD*165
2
CD*205
2
CD*251
3
CD*308
3
CD*415
4
CD*510
4
CD*616
6
Quiet-Line Models
DCD*143
2
DCD*214
3
DCD*286
4
DCD*409
6
DCD*572
8

Liebert® DS™

Number
of Circuits

Hot Gas

Liquid

Net Weight
lb (kg)

FSC or
VFD

Liebert Lee-Temp
(includes receiver)

2
2
2
2
2
2
2

7/8
1-1/8
1-1/8
1-3/8
1-3/8
1-5/8
1-5/8

5/8
7/8
7/8
1-1/8
1-1/8
1-1/8
1-1/8

425 (193)
495 (225)
500 (227)
670 (304)
840 (381)
1188 (539)
1380 (626)

5 (2.3)
7 (3.2)
10 (4.6)
11 (5.0)
24 (10.9)
29 (13.2)
26 (11.8)

26 (11.8)
54 (24.4)
36 (16.3)
55 (24.9)
102 (46.2)
142 (64.4)
108 (49.0)

2
2
2
2
2

1-1/8
1-1/8
1-1/8
1-5/8
2-1/8

7/8
7/8
7/8
1-1/8
1-1/8

515 (234)
840 (381)
1105 (501)
1380 (626)
2430 (1102)

N/A
N/A
N/A
N/A
N/A

61 (27.7)
77 (34.9)
119 (54.0)
125 (55.8)
186 (84.4)

68

Air-Cooled Systems

Figure 57

Fin/tube condenser dimensions, 2-fan model

43-9/16"
(1106mm)
91-1/2"
(2324mm)

37-7/8"
(962mm)

18"
(457mm)

84"
(2134mm)

Emerson recommends a
clearance of 36" (915mm)
on each side for proper
operation and component
access.

43-3/16"
(1097mm)
Figure 58

Fin/tube condenser dimensions, 3-fan and 4-fan models
43-9/16"
(1106mm)
131-1/2"
(3340mm)
37-7/8"
(962mm)

43-9/16"
(1106mm)
171-1/2"
(4356mm)

18"
(457mm)

124"
(3150mm)

70"
(1778mm)

37-7/8"
(962mm)

Eyebolts
for Lifting

43-3/16"
(1097mm)

18"
(457mm)

Note:
Overall height to the top of fan guard
43-1/8" (1095mm)

164"
(4166mm)
43-3/16"
(1097mm)

69

Emerson recommends a
clearance of 36" (915mm)
on each side for proper
operation and component
access.

Liebert® DS™

Air-Cooled Systems

Figure 59

Fin/tube condenser dimensions, 6-fan and 8-fan models

131-1/2"
(3340mm)

87-1/8"
(2213mm)
87-1/8"
(2213mm)

171-1/2"
(4356mm)

37-7/8"
(962mm)

37-7/8"
(962mm)

59"
(1499mm)

18"
(457mm)

86-3/4"
(2203mm)

Overalll height to the top
of the fan guard is 43-1/8” (1095mm).

Liebert® DS™

18"
(457mm)

124"
(3150mm)

70" (1778mm)
1-1/2" (38mm)
diameter hole for
rigging (typ.4)
86-3/4"
(2203mm)

70

164"
(4166mm)

Emerson recommends
a clearance of 36"
(915mm) on each side
for proper operation
and component
access.

Air-Cooled Systems

Electrical Data—Fin/Tube Condensers
Table 51

Fin/tube condenser data, 60Hz

Model #

83, 104

165, 205

251, 308

415, 510

616

830, 1010

1 Fan
2 Fans
3 Fans
4 Fans
6 Fans
8 Fans
Input
Voltage ph FLA WSA OPD FLA WSA OPD FLA WSA OPD FLA WSA OPD FLA WSA OPD FLA WSA OPD
Fan Speed Controlled
208/230
460

6.0

15

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

2.5

3.1

15

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

575

1.9

2.4

15

—

—

—

—

—

—

—

—

—

—

—

—

—

—

—

208/230

—

—

—

8.3

9.5

15

11.8 13.0

15

15.3 16.5

20

23.6 24.8

30

30.6 31.8

40

—

—

—

4.2

4.8

15

5.9

6.5

15

7.6

8.2

15

11.8 12.4

15

15.2 15.8

20

—

—

—

3.3

3.8

15

4.7

5.2

15

6.1

6.6

15

9.4

9.9

15

12.2 12.7

15

3.7

4.6

15

7.2

8.1

15

10.7 11.6

15

14.2 15.1

20

N/A

N/A

N/A N/A

N/A

N/A

1.8

2.3

15

3.5

4.0

15

5.2

5.7

15

6.9

7.4

15

N/A

N/A

N/A N/A

N/A

N/A

460

1

4.8

3

575

VFD Controlled
208/230
460

3

Lee-Temp Controlled/Fan-Cycling
208/230
460

3

575

3.5

4.4

15

7.0

7.9

15

10.5 11.4

15

14.0 14.9

20

21.0 21.9

25

28.0 28.9

35

1.7

2.1

15

3.4

3.8

15

5.1

5.5

15

6.8

7.2

15

10.2 10.6

15

13.6 14.0

20

1.4

1.8

15

2.8

3.2

15

4.2

4.6

15

5.6

6.0

15

8.4

15

11.2 11.6

15

8.8

FLA = Full Load Amps; WSA = Wire Size Amps; OPD = Maximum Overcurrent Protection Device

Fin/tube condenser data, Liebert Quiet-Line™ (Liebert Lee-Temp™ controlled/fan-cycling), 60Hz

Table 52

Model # ph

63

119, 127, 143

214

286

409

572

1 Fan
2 Fans
3 Fans
4 Fans
6 Fans
8 Fans
Input
Voltage ph FLA WSA OPD FLA WSA OPD FLA WSA OPD FLA WSA OPD FLA WSA OPD FLA WSA OPD
208/230
460
575

3

1.8

2.3

15

3.6

4.1

15

5.4

5.9

15

7.2

7.7

15

10.8 11.3

15

14.4 14.9

20

0.9

1.1

15

1.8

2.0

15

2.7

2.9

15

3.6

3.8

15

5.4

5.6

15

7.2

7.4

15

0.7

0.9

15

1.4

1.6

15

2.1

2.3

15

2.8

3.0

15

4.2

4.4

15

5.6

5.8

15

FLA = Full Load Amps; WSA = Wire Size Amps; OPD = Maximum Overcurrent Protection Device

71

Liebert® DS™

Air-Cooled Systems

Electrical Field Connections—Liebert Fin/Tube Condensers
Figure 60

Electrical field connections for Fan Speed Control fin/tube condensers

Electric service connection
terminals when factory
disconnect is NOT supplied.

Electric service connection
and fuse block.
Factory wired to 24V
Class 2 control circuit.

Electric service connection
terminals when factory
disconnect is supplied.

Control interlock (70, 71)
Field-supplied Class 2 wiring to
interlock condenser 24V controls
to Liebert room unit;
7/8 in. (22.2mm) diameter
hole provided in bottom
of electric box.

Factory installed disconnect
switch (optional).

Electric service entrance. A 7/8"
(22.2mm) diameter hole in a
1 1/8 in (28.6mm) knockout
provided in bottom of electric box.

Factory-wired to components
on electric panel.
Earth ground bar (optional on 50Hz only).
Connection terminals with factory
ground from each high voltage
component for field-supplied
earth grounding wire.
Earth ground connection (60Hz).
Connection terminals for field
supplied earth grounding wire
when factory disconnect is NOT
supplied.

Earth ground connection (60Hz).
Connection terminal for fieldsupplied earth grounding wire
when factory disconnect is
supplied.

Electric service, not by Liebert.
Single-phase for condenser
models CSF, CDF with single
fan motor. Three-phase for
all other condenser models.
DPN000666
Rev. 0

NOTE: Refer to specification sheet for full load amp and wire size amp ratings.

Liebert® DS™

72

Air-Cooled Systems

Figure 61

Electrical field connections for VFD control fin/tube condensers

Factory-wired to 24V
control circuit.
Control interlock (70, 71)
Field-supplied
Class 1 wiring to
interlock condenser 24V
controls to Liebert
room unit; 7/8 in.
(22.2mm) diameter
hole provided in
bottom of electric box.

Factory-installed fuse block on
60Hz units. Circuit breaker supplied
in lieu of fuse block on 50Hz units.

V
F
D

SPD

Factory-installed
disconnect switch

Alarm Connections
Field-supplied 24V Class 1
wiring to remote alarm circuits
Surge Protection Device (SPD)
alarm contact connections (11, 12).
Variable Frequency Drive (VFD)
alarm contact connections (13, 14)
Factory-wired to components
on electric panel.
Earth ground bar (optional on 50Hz only).
Connection terminals with factory
ground from each high voltage
component for field-supplied
earth grounding wire.

Electric service connection
terminals with factorysupplied disconnect

Electric service entrance.
A 7/8" (22.2mm) diameter
hole in a 1-1/8 in (28.6mm)
knockout provided in bottom
of electric box.

Earth ground connection (60Hz).
Connection terminal for
field-supplied earth grounding wire
when factory disconnect is supplied.

Electric service,
not by Emerson

DPN001051
Rev. 1

NOTE: Refer to specification sheet for full load amp and wire size amp ratings.

73

Liebert® DS™

Air-Cooled Systems

Figure 62

Electrical field connections for Liebert Lee-Temp control fin/tube condensers
Lee-Temp receiver tank (1 per circuit).
NOTE: Standard heater pads are 150 watts each.
(Optional 300 watt heater pads are available.)
Standard heater pad voltage is 230V. (120V
heater pad voltage is optional.)

Electrical connection box with cover.
Electrical service connection.
Pigtails in electric handy
box are factory wired to LeeTemp heater pads for field
connection of separate
continuous electric source,
wiring not by Emerson.

Electric service connection
and fuse block.

Electric service connection
terminals when factory
disconnect is NOT supplied.

Factory wired to 24V
Class 2 control circuit.
Control interlock (70, 71)
Field-supplied Class 2 wiring to
interlock condenser 24V controls
to Liebert room unit;
7/8 in. (22.2mm) diameter
hole provided in bottom
of electric box.

70

71

Electric service connection
terminals when factory
disconnect is supplied.
Factory-installed disconnect
switch (optional).

Factory-wired to components
on electric panel.
Earth ground bar (optional on 50Hz only).
Connection terminals with factory ground
from each high-voltage component
for field-supplied earth grounding wire.

Electric service entrance. A
7/8 in (22.2mm) diameter hole
in a 1 1/8 in (28.6mm) knockout
provided in bottom of electric box.

Earth ground connection (60Hz).
Connection terminal for field-supplied
earth grounding wire when factory Earth ground connection (60Hz).
disconnect is NOT supplied.
Connection terminal for field-supplied

Electric service. Three-phase for
all models. Wiring not by Emerson.

earth grounding wire when factory disconnect
is supplied.

DPN000683
Rev. 0

NOTE: Refer to specification sheet for full load amp and wire size amp ratings.

Table 53

Liebert Lee-Temp receiver electrical data, fin/tube condensers

Rated Voltage - Single Phase
Watts/Receiver

120
150

300

200/208/230
450

150

300

450

Full Load Amps

1.4

2.8

4.2

0.7

1.4

2.1

Wire Size Amps

1.8

3.5

5.3

0.9

1.8

2.7

Maximum Overcurrent
Protection Device, Amps

15

15

15

15

15

15

The Liebert Lee-Temp receiver requires a separate power feed for heaters. The condenser is not designed to supply power to the receiver.

Liebert® DS™

74

Air-Cooled Systems

Piping—Fin/Tube Condensers
Typical System Configurations—Fin/Tube
Figure 64 shows a single refrigeration circuit diagram, displaying the indoor air conditioning unit,
the outdoor condenser (VFD, Fan Speed Control or Liebert Lee-Temp) and field-supplied interconnection piping.
Figure 63
Check
Valve

Piping schematic, air-cooled with semi-hermetic compressor with fin/tube condenser
Relief ValveService
Valve

Liebert Lee-Temp Receiver

Liquid Return
Optional
Sub-Cooling
Coil

Head Pressure
Control Valve

Optional
Sub-Cooling
Coil

Inverted Trap on discharge
and liquid lines to extend above
base of coil by a minimum of
7-1/2" (190mm).

CONDENSER
COIL
(FAN SPEED or VFD)

CONDENSER
COIL
(Liebert Lee-Temp)

Optional Field-Installed
Fusible Plug

Hot Gas Discharge
LIEBERT LEE-TEMP
For rises over
25ft. (7.6m),
trap every 20ft. (6m) or
evenly divided*

LIQUID

Service
Valve

Sensing
Bulb

Cylinder
Unloader(s)

EVAPORATOR
COIL

SUCTION

Muffler
COMPRESSOR Service External
Valve Equalizer
Check Valve
**Muffler

*Isolation
Valve

Hot Gas Discharge
Expansion Solenoid
Valve
Valve

Sight
Glass

Liquid Return

Filter Drier

NOTES: Two refrigeration circuits provided.
Single refrigeration circuit shown for clarity.

*Isolation
Valve

Trap at base of risers
over 5ft. (1.5m)*

* Components are not supplied by
Emerson but are recommended for
proper circuit operation and
maintenance.

Schematic representation shown.
Do not use for specific connection locations.
REFRIGERANT PIPING
FIELD PIPING
Service / Schrader (Access) Connection No Valve Core
Service / Schrader (Access) Connection With Valve Core

75

** Components supplied by Emerson
and must be field-installed (70kW,
77 kW & 105kW models only)
DPN000797
Rev. 6

Liebert® DS™

Air-Cooled Systems

Figure 64

Piping schematic, air-cooled with scroll or digital scroll compressor with fin/tube condenser

Inverted Trap on discharge
& liquid lines to extend above
base of coil by a minimum of
7-1/2" (190mm).

Service Valve
LIQUID RETURN
Head Pressure
Control Valve

Liebert Lee-Temp Receiver

CONDENSER
COIL
(Liebert Lee-Temp)

Optional field

CONDENSER
COIL
(Fan Speed or VFD)

Relief
Valve

Check Valve

installed fusible
plug

Hot Gas
Discharge

FAN SPEED/VFD
(Liebert Lee-Temp or VFD condenser
is required with digital scroll)

28-42kW Digital Solenoid Valve
53-70kW Digital
Solenoid Valve

LIEBERT LEE-TEMP
(Liebert Lee-Temp or VFD condenser
is required with digital scroll)
LIQUID
EVAPORATOR
COIL

Sensing
Bulb
SUCTION

* For rises over
25ft. (7.6m)
trap every 20ft.
(6m) or evenly
divided

Service
Valve
Check
Service External
Valve Compressor
Valve Equalizer
*Isolation
Valve
HOT GAS DISCHARGE
Expansion
Valve

Solenoid
Valve

Sight
Glass

Filter Drier

*Isolation
Valve Trap at base
of risers over
* Components are not supplied
5ft. (1.5m)
by Emerson but are recommended
for proper circuit operation and
maintenance.
LIQUID RETURN

Refrigerant Piping
Field Piping
Service/Schrader (Access) Connection; No Valve Core
Service/Schrader (Access) Connection With Valve Core

NOTES: Schematic representation shown. Do not use for specific connection locations.
Two refrigeration circuits provided. Single refrigeration circuit shown for clarity.

Liebert® DS™

76

DPN000798
Rev. 5

Air-Cooled Systems

Figure 65

VFD and Fan Speed Control condenser piping—Fin/tube condensers

Optional fusible plug service kit to
be brazed into the liquid line(s) in
either the vertical or horizontal
position (where required).
(Vertical position is preferable,
horizontal position is optional.)
For two-circuit systems, one
fusible plug kit must to
be installed in each circuit.
Entering Hot
Gas Line

Leaving
Liquid Line

Inverted Traps (field-supplied)
to extend a minimum of
7-1/2" (190mm) above coil base
Metal
Clamp

Vertical

Horizontal

See
Detail
A-A

Isolator
Detail A-A

Fasten liquid and hot gas lines to leg using
flat surface clamps with isolators (field-supplied).
Support field piping separately to avoid coil damage
and loss of charge.
Figure 66

DPN001065
Rev. 1

Liebert Lee-Temp head pressure control condenser piping—Fin/tube condensers

Inverted Traps (field-supplied)
to extend 8" (203mm)
above coil base
Entering Hot
Gas Line

Hot Gas Line
Liquid
Line

Fasten liquid and hot gas lines
to leg using flat surface clamps
with isolators (field-supplied).
Support field piping separately
to avoid coil damage and loss
of charge.
Metal
Clamp

Leaving
Liquid
Line

See Detail A-A

Position elbow to direct
relief valve downward
DPN000669
Rev. 2

Isolator
Detail A-A

77

Liebert® DS™

Air-Cooled Systems

3.12.2 Piggyback Condensers
Piggyback Selections
Table 54

Liebert DS piggyback condenser selection

Air-Cooled Condenser Selection
Condenser
Type

Ambient
Temp. °F (°C)

028

035

042

053

070

077

105

95 (35)

PB-925

PB-925

PB-1100

PB-1350

N/A

N/A

N/A

100 (38)

PB-1100

PB-1100

PB-1350

N/A

N/A

N/A

N/A

105 (41)

PB-1100

PB-1350

N/A

N/A

N/A

N/A

N/A

Piggyback

Table 55

Liebert DS Size

Piggyback condenser airflow and static pressure data
HP/RPM
Ext. Static Pressure - in. (Pa)

Model

No.
of Fans

CFM / m / hr

0.25 (62.3)

0.50 (125)

0.75 (187)

1.0 (249)

PB-350A

2

7600/12,920

2/580

3/650

3/720

3/790

PB-550A

2

6600/11,200

2/575

3/650

3/725

3/800

PB-675A

2

6900/11,730

2/605

3/680

3/750

3/820

PB-925A

2

12,500/21,250

7.5/760

7.5/810

7.5/870

7.5/920

PB-1100A

2

12,300/20,910

7.5/780

7.5/830

7.5/890

7.5/940

PB-1350A

2

16,500/28,050

10/640

10/695

10/740

15/790

3

Values are without filter box. External Static Pressure = filter pressure drop + other static drops.
Source: DPN000695, Rev. 0

Liebert® DS™

78

Air-Cooled Systems

Dimensions—Indoor Piggyback Condensers
Figure 67

Piggyback condenser planning dimensions
E
H
K
J
R

1-1/8"
(29mm)
K

sions
Dimen
Overall

Overa
ll Dim
ensio
ns

Optional Fan
Discharge
Disconnect
Switch (optional)

S
H
J

35-1/8"
(892mm)

D

B

72"
(1829mm)

R
Fan Discharge
Shaded areas
indicate a recommended
clearance of 34" (864mm)
for component access.

5"
(127mm)

1" (25.4mm)
G

Condenser Coil Inlet
And Duct Connection
C

UNIT DIMENSIONAL DATA

F

Floor Level
A

NOTE: A 1" (25.4mm) flange is provided on all units
for duct connection to coil duct opening and
fan air discharge opening.

FLOOR CUTOUT DIMENSIONS
Table 56
Model
PB-350A
PB-550A
PB-675A
PB-925A
PB-1100A
PB-1350A

C
Unit Base

10" (254mm)

Drain Outlet
Opening

A
Unit Base

DPN000695
Rev. 0

Piggyback condenser dimensions, in. (mm)
A

B

C

D

E

F

G

H

J

K

R

S

72
(1829)
72
(1829)
72
(1829)
97
(2464)
97
(2464)
97
(2464)

74
(1880)
74
(1880)
74
(1880)
99
(2515)
99
(2515)
99
(2515)

31
(787)
31
(787)
31
(787)
33
(838)
33
(838)
33
(838)

32
(813)
32
(813)
32
(813)
34
(864)
34
(864)
34
(864)

1-1/8
(29)
1-1/8
(29)
1-1/8
(29)
3-1/8
(79)
3-1/8
(79)
3-1/8
(79)

33
(838)
33
(838)
33
(838)
45-1/2
(1156)
45-1/2
(1156)
45-1/2
(1156)

60
(1524)
60
(1564)
60
(1564)
85
(2159)
85
(2159)
85
(2159)

8-5/8
(219)
8-5/8
(219)
8-5/8
(219)
23-5/16
(592)
23-5/16
(592)
16-5/16
(421)

50-3/16
(1275)
50-3/16
(1275)
50-3/16
(1275)
50-3/16
(1275)
50-3/16
(1275)
63-7/8
(1622)

16-1/16
(408)
16-1/16
(408)
16-1/16
(408)
16-1/16
(408)
16-1/16
(408)
19-1/8
(486)

13-3/16
(335)
13-3/16
(335)
13-3/16
(335)
23-1/2
(597)
23-1/2
(597)
16-13/16
(427)

14-11/16
(373)
14-11/16
(373)
14-11/16
(373)
14-11/16
(373)
14-11/16
(373)
11-5/8
(295)

Source: DPN000695, Rev. 0

Table 57

Piggyback condenser physical data, 60Hz

Model

Number
of Circuits

PB-350
PB-550
PB-675
PB-925
PB-1100
PB-1350

2
2
2
2
2
2

Connection Size, OD, In.
Hot Gas

Liquid

Condenser Charge Per Circuit
R-407C, lb (kg)

5/8
5/8
7/8
7/8
1-1/8
1-1/8

1/2
1/2
1/2
1/2
5/8
5/8

18 8.2)
17 (7.8)
25 (11.2)
22 (9.9)
34 (15.5)
34 (15.5)

79

Liebert® DS™

Air-Cooled Systems

Electrical Data—Piggyback Condensers
Table 58

Piggyback condenser electrical data, 60 Hz, 3 phase
208

230

460

1

575

hp

FLA

LRA

FLA

LRA

FLA

LRA

FLA

LRA

2.0

7.5

51.0

6.8

44.0

3.4

22.0

2.7

17.6

3.0

10.6

73.6

9.6

64.0

4.8

32.0

3.9

25.6

5.0

16.7

106.0

15.2

88.0

7.6

44.0

6.1

35.2

7.5

25.3

129.4

22.0

111.4

11.0

55.7

9.0

44.8

10.0

30.8

186.0

28.0

162.0

14.0

84.0

11.0

66.0

15.0

46.2

267.0

42.0

225.0

21.0

116.0

17.0

93.0

1. See Table 59 for separate power feed needed for Lee-Temp receiver heaters.
2. FLA: Full Load Amps; LRA: Lock Rotor Amps
3. Source: DPN000695, Rev. 0

Electrical Field Connections—Liebert Piggyback Condensers
Figure 68

Electrical field connections for Liebert piggyback condensers
Factory-installed unit disconnect switch (optional)

Field-supplied disconnect switch
when factory-installed unit disconnect
switch is not provided.

Three phase electric
service not by
Emerson

Three-phase connection. Electric
service connection terminals
when factory disconnect switch
is supplied

Three-phase connection. Electric service
connection terminals when factory
disconnect switch is not supplied

Factory-installed disconnect
switch (optional)
Electric conduit knockouts
on bottom of wire raceway
Knockout sizes 1-3/8"
(34.9mm) or 1-3/4" (44.5mm)
or 2 1/2" (63.5mm)
Three-phase electric service not by
Emerson

Factory-wired to components
on electric panel.

Earth ground connection (60Hz).
Connection terminal for field-supplied
earth grounding wire.

71
70

91

Liebert Lee-Temp electric
service connection to terminals
supplied from factory-wired
Liebert Lee-Temp heater pads
for field connection of separate
continuous electrical source,
not supplied by Emerson.

90

Factory-wired to components
on electric panel
Control interlock Field-supplied, Class 2 wiring to
Terminals 70 & 71 to interlock condenser 24V
controls to Liebert room unit; 7/8 in. (22.2mm)
diameter knockout provided in bottom of box

Refer to specification sheet for full load amp and wire size amp ratings.

Liebert® DS™

80

DPN000697
Rev. 0

Air-Cooled Systems

Table 59

Separate electrical supply requirements for Liebert Lee-Temp™ receivers, 60Hz, 1 Ph

Voltage

120

120

208/230

208/230

Watts/Receiver

150

300

150

300

FLA

2.5

5.0

1.4

2.8

WSA

3.1

6.2

1.8

3.6

OPD

15

15

15

15

Only one independent input power supply is needed per piggyback unit; connect to Terminals 90 & 91.

Figure 69

Electrical field connections for Liebert piggyback condensers

Factory-installed unit disconnect switch (optional)

Field-supplied disconnect switch
when factory-installed unit disconnect
switch is not provided.

Three phase electric
service not by
Emerson

Three-phase connection. Electric
service connection terminals
when factory disconnect switch
is supplied

Three-phase connection. Electric service
connection terminals when factory
disconnect switch is not supplied

Factory-installed disconnect
switch (optional)
Electric conduit knockouts
on bottom of wire raceway
Knockout sizes 1-3/8"
(34.9mm) or 1-3/4" (44.5mm)
or 2 1/2" (63.5mm)
Three-phase electric service not by
Emerson

Factory-wired to components
on electric panel.
70

Earth ground connection (60Hz).
Connection terminal for field-supplied
earth grounding wire.

71

91

Liebert Lee-Temp electric
service connection to terminals
supplied from factory-wired
Liebert Lee-Temp heater pads
for field connection of separate
continuous electrical source,
not supplied by Emerson.

90

Factory-wired to components
on electric panel
Control interlock Field-supplied, Class 2 wiring to
Terminals 70 & 71 to interlock condenser 24V
controls to Liebert room unit; 7/8 in. (22.2mm)
diameter knockout provided in bottom of box

Refer to specification sheet for full load amp and wire size amp ratings.

81

DPN000697
Rev. 0

Liebert® DS™

Air-Cooled Systems

Figure 70

Piggyback condenser piping and electrical connection locations

See Note 2
See Note 1

See Note 2
See Note 1

A

B
C

1-13/16"
(46mm)

G
1-13/16"
(46mm)

C

"

E
See Note 3

E

D
F

D
See Note 2

3" (76mm)

3" (76mm)

1" (25mm)
Panel

1" (25mm)
Panel
3" (76mm)

3" (76mm)

See Note 2

See Note 2

3" (76mm)

See Note 1

3" (76mm)
E See Note 3

See Note 1

E See Note 3

12-5/8"
(321mm)

9-11/16"
(246mm)

12-5/8"
(321mm)

4-1/2" (114mm)

4-1/2"
(114mm)

9-11/16"
(246mm)

7-7/8"
(200mm)

7-7/8"
(200mm)

MODELS PB-350A THRU PB-1100A

MODEL PB-1350A
5-1/2" (140mm) See Note 1
3-1/4" (85mm) See Note 2

Drain Outlet
Location
1-1/4" (32mm) F.P.T.

3"
(76mm)

8"
(203mm)

6"
(152mm)
3"
(76mm)

See Note 3
1-1/2"
(38mm)

ALL MODELS

1. Multiple knockouts of 1-3/8" (35mm), 1-3/4" (45mm) and 2-1/2" (64mm) for main power supply (typical).
2. 7/8" (22.2mm) knockouts for Liebert Lee-Temp power supply (typical).
3. Cover plate for access of liquid line and hot gas line.

Table 60

DPN00696
Rev. 1

Dimensions—Piggyback condensers, in. (mm)

Model

C

D

E

F

G

PB-350A

—

—

27-1/4 (692)

2-1/2 (64)

6 (152)

10-1/8 (267)

28-3/4 (730)

PB-550A

—

—

27-1/4 (692)

2-1/2 (64)

6 (152)

10-1/8 (267)

28-3/4 (730)

PB-675A

—

—

27-1/4 (692)

2-1/2 (64)

6 (152)

10-1/8 (267)

28-3/4 (730)

PB-925A

—

—

27-1/4 (692)

2-1/2 (64)

6 (152)

10-1/8 (267)

28-3/4 (730)

PB-1100A

—

—

27-1/4 (692)

2-1/2 (64)

6 (152)

10-1/8 (267)

28-3/4 (730)

PB-1350A

11-1/4 (286)

24 (610)

26-1/2 (673)

7 (178)

6 (152)

—

—

Table 61

A

B

Piping connection sizes, ODS, in. (mm)

Model

Liquid Line

Hot Gas Line

Drain

PB-350A

2 @ 1/2 (13)

2 @ 5/8 (16)

1-1/4 (32)

PB-550A

2 @ 1/2 (13)

2 @ 5/8 (16)

1-1/4 (32)

PB-675A

2 @ 1/2 (13)

2 @ 7/8 (22)

1-1/4 (32)

PB-925A

2 @ 1/2 (13)

2 @ 7/8 (22)

1-1/4 (32)

PB-1100A

2 @ 5/8 (16)

2 @ 1-1/8 (29)

1-1/4 (32)

PB-1350A

2 @ 5/8 (16)

2 @ 1-1/8 (29)

1-1/4 (32)

Liebert® DS™

82

Air-Cooled Systems

Figure 71

™

Piping schematic—Liebert DS with piggyback condenser and Liebert Lee-Temp

Condenser Coil
Liquid Return from
Condenser Coil

Head Pressure
Control with
Integral Check
Valve

Rotalock Valve

Check
Valve

Pressure
Relief Valve

Liebert
Lee-Temp
Receiver
* Traps
every
25 ft.
(7.6m)
of Rise

Sight Glasses

Evaporator
Coil

Service
Valve

Expansion
Valve
Solenoid
Valve

Sensing Bulb

Sight
Glass
External
Equalizer

Filter
Dryer

* Shutoff
Valve

Service
Valves

Liquid
Return
to Unit

Double discharge risers
are required wWhen unit
is operating below 30%
of full capacity. Consult
factory for proper selection.

Muffler

Cylinder
Unloaders
(Optional)

* * Muffler

Compressor
Hot Gas
Discharge

* Components are not supplied by Emerson
but are recommended for proper
circuit operation and maintenance
FACTORY PIPING ** Components supplied by Emerson
and must be field-installed.
OPTIONAL PIPING
FIELD PIPING

SINGLE CIRCUIT SHOWN

DPN000692
Rev. 0

83

Liebert® DS™

Air-Cooled Systems

3.13

ANCILLARY ITEMS—AIR-COOLED SYSTEMS

Figure 72

Floor stand dimensions—28-42kW (8-12 ton), downflow

A+1-1/2"
(38mm) (with feet)
A
47-15/16"
(1218mm)

B

4-1/2"
(114mm)

33"
(838mm)

16-3/4"
(425mm)

34-1/2"
(876mm)
(with feet)

Supply air
discharge opening

Supply air
discharge
opening

1"
(25mm) TYP.

Gussets supplied on floor stands
12" (305 mm) tall and greater
Optional turning vane
shown as front air discharge.

Turning vane air outlet
Optional turning vane can be field-installed
in supply air discharge opening for front or
rear air discharge.
NOTE: Right side of paneled unit is flush with right side of floorstand. All other paneled sides overhang
floor stand 1" (25mm).
* Leveling feet are provided with ± 1-1/2" (38mm) adjustment from nominal height C.

7/8"
(23mm)

Table 62

3"
(76mm)

Floor stand and floor planning dimensions—28-42kW (8-12 ton), downflow
Dimensional Data, in. (mm)

Height, in. (mm)

Model

A

B

Air-Cooled Semi-Hermetic Models and
All Water/Glycol/GLYCOOL Models

85
(2159)

26
(660)

Air-Cooled Scroll Models and
Air-Cooled Digital Scroll Models

72
(1829)

13
(330)

Source: DPN000820, Rev. 3

Liebert® DS™

84

C*

D turning vane

9 (229)

4 (111)

12 (305)

7 (187)

15 (381)

10 (264)

18 (457)

13 (340)

21 (533)

16 (416)

24 (610)

19 (492)

DPN000820
Rev. 3

Air-Cooled Systems

Figure 73

Floor stand dimensions—53-77kW (15-22 ton), downflow

A+1-1/2"
(38mm) (with feet)
A
69-3/4" (1772mm)

B

34-1/2"
(876mm)
(with feet)

16-3/4"
(425mm)

Supply air
discharge
opening

33"
(838mm)

1"
(25mm) TYP.
Gussets supplied on floor stands
12" (305 mm) tall and greater

Supply air
discharge opening

7/8"
(23mm)

Optional turning vane
shown as front air discharge.

3"
(76mm)
Turning vane air outlet
Optional turning vane can be field-installed
in supply air discharge opening for front or
rear air discharge.
NOTE: Right side of paneled unit is flush with right side of floor stand. All other paneled sides overhang
floor stand 1" (25mm). * Leveling feet are provided with ± 1-1/2" (38mm) adjustment from nominal height C.

Table 63

DPN000930
Rev. 2

Floor stand and floor planning dimensions—53-77kW (15-22 ton), downflow
Dimensional Data, in. (mm)

Height, in. (mm)

Model

A

B

Air-Cooled Semi-Hermetic Models and
All Water/Glycol/GLYCOOL Models

108
(2743)

26
(660)

Air-Cooled Scroll Models and
Air-Cooled Digital Scroll Models

97
(2464)

15
(381)

C*

D - Turning Vane

9 (229)

4 (111)

12 (305)

7 (187)

15 (381)

10 (264)

18 (457)

13 (340)

21 (533)

16 (416)

24 (610)

19 (492)

Source: DPN000930, Rev. 2

85

Liebert® DS™

Air-Cooled Systems

Figure 74

Floor stand and floor planning dimension, downflow 53-77kW (15-22 tons) models with EC
fans
A
B
Piping Access Area

3/4"
(19mm)

32"
(813mm)
Center Feet

31-1/2"
(800mm)

32-3/4"
(832mm)

C
Support Feet Centers

3/4"
(19mm)

D

3/4"
(19mm)

7/8"
(23mm)
See Note 4
3"
(76mm)

33"
(838mm)

1"
(25mm)

E

1. This floor stand should be used when EC fans are intended to be lowered under
a raised floor. The standard Liebert DS floor stand can be used if the fans are to
remain in their original raised position.
2. Right side of paneled unit is flush with right side of floor stand. All other paneled sides
overhang floor stand 1" (25mm).
3) The floor stand used with EC units is not symmetrical and its orientation to the
Liebert DSE is critical for lowering the EC fans. Unless the floor stand is installed in
the correct position, the blowers will not lower into the floor stand.
4. Jack and jack support are shipped loose and are intended to be placed into position
under each fan and utilized to lower or raise that fan as needed.

F*

35"
(889mm)
Overall Depth

DPN002151
Rev. 1

* Leveling feet are provided with ±1-1/2" (38mm) adjustment from nominal height C.

Table 64

Floor stand and floor planning dimensions—53-77kW (15-22 ton), downflow with EC fans
Dimensional Data in (mm)
A

B

C

D

E

F

DS053-077, Air-Cooled Semi-Hermetic
and all Water/Glycol/ GLYCOOL
Models

108 (2743)

26 (660)

106.5 (2705)

108 (2743)

109.5 (2781)

24 (610)

DS053-077, Air-Cooled Scroll and
Air-Cooled Digital Scroll Models

97 (2464)

15 (381)

5.5 (2426)

97 (2464)

98.5 (2502)

30 (762)

Liebert DS Model

36 (914)

Source: DPN002151, Rev. 1

42 (1067)
48 (1219)

Liebert® DS™

86

Air-Cooled Systems

Figure 75

Floor stand and floor planning dimensions—downflow 105kW (30 ton) models with EC fans,
standard scroll and semi-hermetic compressors without turning vane

Digital scroll compressors
not available on 105 models.
132-1/2" (3366mm)
(with feet)
131" (3327mm)
25"
(635mm)
34-1/2"
(876mm)
33"
(with feet) (838mm)
74" (1880mm)

1"
(25mm Typ.)

Gussets supplied on floor stands
12" (305mm) tall and greater.

3"
(76mm)
NOTE:
1) This floor stand should be used when EC fans are intended
to be lowered under a raised floor. The standard Liebert DS
A*
floor stand can be used if the fans are to remain in their
original raised position.
35"
2) Right side of paneled unit is flush with right side of floor stand.
(889mm)
All other paneled sides overhang floor stand 1" (25mm).
Overall
3) The floor stand used with EC units is not symmetrical and
Depth
its orientation to the Liebert DS is critical for lowering the EC fans.
Unless the floor stand is installed in the correct position,
the blowers will not lower into the floor stand.
4) Jack and jack support are shipped loose and are intended
to be placed into position under each fan and utilized to lower
or raise that fan as needed.
*Leveling feet are provided with ± 1-1/2" (38mm) adjustment from nominal height “A”.

See Note 4

Height - A
in. (mm)
24 (610)
30 (762)
36 (914)
42 (1067)
48 (1219)

DPN002152
Rev. 1

87

Liebert® DS™

Air-Cooled Systems

Figure 76

Floor stand dimensions—105kW (30 ton), downflow with turning vane and centrifugal fans

132-1/2"
(3366mm) (with feet)
131"
(3327mm)
91-3/4"
(2330mm)

26"
(660mm)

4-1/2"
(114mm)

34-1/2"
(876mm)
(with feet)
33"
(838mm)

16-3/4"
(425mm)

1"
(25mm) TYP.

Supply air
discharge
opening

Supply air
discharge opening

Gussets supplied on floor stands
12" (305 mm) tall and greater
7/8"
(23mm)
Optional turning vane
shown as front air discharge.

3"
(76mm)

Turning vane air outlet
Optional turning vane can be field-installed
in supply air discharge opening for front or
rear air discharge.

C*

D

NOTE: Right side of paneled unit is flush with right side of floorstand. All other paneled sides overhang
floor stand 1" (25mm).
* Leveling feet are provided with ± 1-1/2" (38mm) adjustment from nominal height C.

Table 65

Floor stand and floor planning dimensions—105kW (30 ton), downflow

Height, in. (mm)
C*

D Turning Vane

9 (229)

4 (111)

12 (305)

7 (187)

15 (381)

10 (264)

18 (457)

13 (340)

21 (533)

16 (416)

24 (610)

19 (492)

Source: DPN001059, Rev. 2

Liebert® DS™

88

DPN001059
Rev. 2

Air-Cooled Systems

Figure 77

Plenum dimensions—28-105kW (8-30 ton), upflow

FRONT VIEWS

REAR VIEWS

WITH GRILLE

WITH GRILLE
Panel removable
for condenser clean
out access
(Water/Glycol/GLYCOOL
models only)

WITHOUT GRILLE
34"
(864mm)

LEFT SIDE VIEWS CHECK ONE (1):

B

WITHOUT GRILLE

A

1"
(25mm)

H RIGHT SIDE VIEWS CHECK ONE (1):

WITH GRILLE

76"
(1930mm)

WITHOUT
GRILLE
SIDE VIEW - UNIT WITH PLENUM
FRONT VIEW - UNIT WITH PLENUM
Notes:
1. Typical 53-77kW (15-22 Tons) unit orientation shown with grille Plenum.
View varies by unit size and Plenum selection.
2. All Plenums are shipped flat and must be field assembled.
3. Optional grille Plenum kits must include front or rear grille.
4. Non-grille Plenums are open on the top and not designed with duct flange.

Table 66

WITH GRILLE

WITHOUT
GRILLE

DPN001187
Rev. 1

Plenum dimensions, in. (mm)—28-105kW (8-30 ton), upflow
Dimensions, in. (mm)

Grille Size, in (mm) - Nominal

Model

A

B

28-42kW (8-12 ton) Air-Cooled Scroll and
Air-Cooled Digital Scroll Models
28-42kW (8-12 ton) Semi-Hermetic and
all Water/Glycol/GLYCOOL Models
53-77kW (15-22 ton) Air-Cooled Scroll and
Air-Cooled Digital Scroll Models
53-77kW (15-22 ton) Semi-Hermetic and
all Water/Glycol/GLYCOOL Models

59-1/4
(1505)
59-1/4
(1505)
82-1/4
(2089)
82-1/4
(2089)

13-3/4
(349)
26-3/4
(679)
15-3/4
(400)
26-3/4
(679)

105kW (30 ton)—All Models

105-1/4 26-3/4
(2673) (679)

Front/Rear
Grilles
18 x 55
(457 x 1397)
18 x 55
(457 x 1397)
18 x 78
(457 x 1981)
18 x 78
(457 x 1981)
(1) 18 x 20
(457 x 508)
(1) 18 x 78
(457 x 1981)

Side Grille
18 x 20
(457 x 508)
18 x 20
(457 x 508)
18 x 20
(457 x 508)
18 x 20
(457 x 508)

Height, in. (mm)
H
20 (508)
24 (610)
30 (762)
36 (914)

18 x 20
(457 x 508)

Source: DPN001187, Rev. 1

89

Liebert® DS™

Air-Cooled Systems

Figure 78

Floor stand dimensions, piggyback condensers with centrifugal fans

C

B
A

1"
(25.4mm)

* H ± 1-1/2" (38mm)
For height selection
refer to chart.

See Table 68 for
height selection
Leg Support

Center Leg Provided
on 99" Cabinets

on Models
18, 21 & 24" High

Table 67

Floor stand dimensions, in. (mm)
A

B

C

PB-350A, PB-550A
PB-675A

72 (1829)

36 (914)

31 (787)

PB-925A, PB-1100A
PB-1350A

97 (2464)

48-1/2 (1232)

33 (838)

Model

Source: DPN000727, Rev. 0

Table 68
Nominal

Floor stand height selection, in. (mm)
Range (Nominal ±1-1/2 *)

9 (229)

7-1/2 to 10-1/2 (191 to 267)

12 (305)

10-1/2 to 13-1/2 (267 to 343)

15 (381)

13-1/2 to 16-1/2 (343 to 419)

18 (458)

16-1/2 to 19-1/2 (419 to 495)

21 (553)

19-1/2 to 22-1/2 (495 to 572)

24 (610)

22-1/2 to 25-1/2 (572 to 648)

Leveling feet are provided with ±1-1/2" (38mm)
Adjustment from nominal height "H".
Source: DPN000727, Rev. 0

Liebert® DS™

90

DPN000727
Rev. 0

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

4.0

WATER-COOLED, GLYCOL-COOLED AND GLYCOOL SYSTEMS

4.1

CAPACITY AND PHYSICAL DATA

Table 69

Performance data—Water-cooled, EC fans
Model Size

28

35

42

053

070

077

105

CAPACITY DATA WITH EC FANS
Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor
Semi Hermetic Compressors with EC Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH) 42.1 (143.8)
Sensible kW (kBTUH)

39.6 (135)

38.7 (132)

50.1 (171)

65.1 (220)

78.6 (268.3) 87.1 (297.1) 112.1 (382.3)

31.7 (108.2) 48.9 (166.9) 63.4 (212.9) 75.7 (258.2) 83.6 (285.4) 103.9 (354.6)

80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 40.5 (138.1)
Sensible kW (kBTUH) 35.9 (122.4)

39.7 (135.4) 47.9 (163.4) 62.2 (212.1) 75.3 (256.9) 83.4 (284.7) 107.8 (367.7)
34.4 (117.3) 44.4 (151.4)

58 (197.7)

68.9 (235)

76 (259.5)

94.3 (321.9)

41.4 (141.4) 45.9 (156.7) 59.4 (202.6)

72 (245.8)

80 (273)

103.4 (352.9)

38.7 (131.9) 39.5 (134.7) 51.7 (176.4)

61.2 (209)

67.6 (230.8)

83.7 (285.7)

75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45.1% RH
Total kW (kBTUH) 38.9 (132.7)
Sensible kW (kBTUH)

32 (109.3)

72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH)

38 (129.6)

Sensible kW (kBTUH) 29.7 (101.4)

43.5 (43.5)

44.8 (152.9) 57.8 (197.2) 70.2 (239.6)

42.6 (42.6)

36.4 (124.3) 47.7 (162.8) 56.5 (192.9) 62.4 (212.8)

78 (266.2)

101 (344.6)
77.5 (264.3)

Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor
Scroll Compressors
Only

Scroll or Digital Scroll Compressors with EC Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH)

35.2 (120)

Sensible kW (kBTUH) 35.1 (119.9)

42 (143.3)
41.6 (142.1)

47.5 (162.1) 66.3 (224.1) 80.8 (275.6) 88.5 (301.9) 111.3 (379.9)
47.2 (161)

64.3 (215.6)

77 (262.6)

84.5 (288.3) 103.6 (353.4)

80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH)

34 (116.1)

40.1 (136.7) 45.4 (154.8) 63.3 (216.1) 77.5 (264.6)

Sensible kW (kBTUH)

32.5 (111)

37.9 (129.4)

43.1 (147)

58.6 (200.1)

70 (238.9)

85 (290.2)

107.2 (365.9)

76.9 (262.3)

94.1 (321.1)

75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45.1% RH
Total kW (kBTUH) 32.8 (111.8)
Sensible kW (kBTUH)

29.1 (99.2)

38.4 (131)

43.5 (148.4) 60.5 (206.5) 74.3 (253.5) 81.8 (279.1) 103.2 (352.2)

33.8 (115.2) 38.4 (130.9) 52.2 (178.3) 62.3 (212.7) 68.5 (233.6)

83.8 (285.9)

72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH)
Sensible kW (kBTUH)

32 (109.2)

37.5 (127.9)

42.5 (145)

58.9 (201.1) 72.5 (247.5) 79.9 (272.6) 100.9 (344.2)

26.8 (91.6)

31.2 (106.3) 35.4 (120.7) 48.3 (164.7) 57.7 (196.7) 63.2 (215.6)

77.5 (264.4)

FAN SECTION - Downflow Models - EC Fans Under Floor
Standard Air Volume, CFM (CMH)
4,400 (7,476) 5,200 (8,835)
0.2" external static

6200
(10534)

8,000
(13,592)

9,600
(16,310)

11,000
(18,689)

13700
(23276)

Standard Fan Motor, Nominal kW
(total for all fans)

2.8

2.8

2.8

2.5

4.0

5.9

7.8

Number of Fans

1

1

1

2

2

2

3

1. Canister humidifier not available with EC fans.
2. Capacity data is rated and factory certified per ASHRAE 127-2012 with a 5% tolerance.
3.
4.

Some options or combinations of options may result in reduced air flow—consult factory for recommendations.
Digital scroll not available on 077 and 105 models; units available with semi-hermetic and standard scroll compressors only

91

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Table 70

Performance data—Water-cooled units with centrifugal fans

Model Size

28

35

42

053

070

077

105

CAPACITY DATA WITH CENTRIFUGAL FANS
Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor
Semi-Hermetic Compressors with Centrifugal Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH) 41.5 (141.6)

42.4 (144.7)

48.4 (165.2)

62.1 (211.9)

76.9 (262.5)

85.0 (289.9)

110.3 (376.4)

Sensible kW (kBTUH) 38.9 (132.8)

41.6 (141.9)

47.4 (161.7)

57 (194.6)

72.8 (248.4)

80.4 (274.4)

102.2 (348.7)

80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 39.8 (135.9)

40.4 (137.9)

46.1 (157.4)

59.7 (205.2)

73.7 (251.6)

81.5 (278.1)

106 (361.8)

Sensible kW (kBTUH) 35.2 (120.2)

37.6 (128.3)

42.8 (146.1)

51.9 (180.6)

66.1 (225.5)

72.9 (248.8)

92.6 (315.9)

75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45.1% RH
Total kW (kBTUH) 38.3 (130.5)

38.6 (131.9)

44.2 (150.7)

57.2 (196.9)

70.6 (240.8)

78.2 (266.7)

101.7 (346.9)

Sensible kW (kBTUH) 31.4 (107.1)

33.3 (113.8)

37.9 (129.3)

46.4 (162.1)

58.7 (200.3)

64.7 (220.8)

82 (279.8)

72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH) 37.3 (127.4)
Sensible kW (kBTUH)

29.1 (99.2)

37.7 (128.5)

43.1 (146.9)

55.8 (191.9)

68.8 (234.7)

76.2 (260.1)

99.2 (338.6)

30.7 (104.7)

34.8 (118.8)

43 (150.6)

54.2 (184.9)

59.6 (203.5)

75.7 (258.4)

Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor
Scroll Compressors
Only

Scroll or Digital Scroll Compressors with Centrifugal Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH) 34.5 (117.8)

40.9 (139.7)

45.8 (156.3)

64.9 (219.6)

79.0 (269.6)

86.5 (295.1)

109.6 (374)

Sensible kW (kBTUH) 34.5 (117.7)

40.6 (138.5)

45.6 (155.5)

62.0 (207.9)

74.0 (252.5)

81.3 (277.3)

101.8 (347.5)

80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 33.4 (113.9)

39.0 (133.2)

43.6 (148.8)

62.2 (212.1)

75.9 (259.1)

83.1 (283.6)

105.5 (360)

Sensible kW (kBTUH) 31.9 (108.8)

36.9 (125.8)

41.5 (141.6)

56.4 (192.6)

67.2 (229.3)

73.7 (251.5)

92.4 (315.2)

75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45% RH
Total kW (kBTUH) 32.1 (109.6)
Sensible kW (kBTUH)

28.4 (97)

37.4 (127.5)

41.7 (142.3)

59.5 (202.9)

72.8 (248.5)

80 (272.9)

101.5 (346.3)

32.7 (111.7)

36.8 (125.5)

50.3 (171.5)

59.8 (203.9)

65.5 (223.7)

82.1 (280)

72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH)

31.4 (107)

36.5 (124.4)

40.7 (138.9)

57.9 (197.5)

71.1 (242.6)

78.1 (266.5)

99.1 (338.3)

Sensible kW (kBTUH)

26.2 (89.4)

30.1 (102.8)

33.8 (115.2)

46.4 (158.4)

55.3 (188.6)

60.5 (206.4)

75.8 (258.5)

FAN SECTION - Downflow Models - Fixed Pitch, Two Belts
Standard Air Volume,
CFM (CMH) 4,400 (7,476) 5,200 (8,835) 6200 (10534) 7,500 (12,743) 9,000 (15,291) 10,400 (17,670) 13,700 (23,276)
0.2" external static
Standard Fan Motor, hp
(kW)
Number of Fans

2 (1.5)

3 (2.2)

5.0 (3.7)

3 (2.2)

5 (3.7)

7.5 (5.6)

10.0 (7.5)

1

1

1

2

2

2

3

1. Capacity data is rated and factory certified per ASHRAE 127-2012 with a 5% tolerance.
2. Some options or combinations of options may result in reduced air flow—consult factory for recommendations.
3. Digital scroll not available on 077 and 105 models; units available with semi-hermetic and standard scroll compressors only

Liebert® DS™

92

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Table 71

Physical data—Water-cooled units
Model Size

028

035

042

053

070

077

105

EVAPORATOR COIL- A-Frame - Copper Tube/Aluminum Fin
Face Area, sq. ft. (sq. m)
Rows of Coil

17.1 (1.6)

17.1 (1.6)

17.1 (1.6)

24.7 (2.3)

24.7 (2.3)

24.7 (2.3)

32.3 (3.0)

3

3

3

3

3

3

3

REHEAT SECTION
Electric Reheat - Three-stage, Stainless Steel Fin Tubular, capacity does not include fan motor heat
Capacity, kW (kBTUH), Standard Selection

15.0 (51.2)

15.0 (51.2)

15.0 (51.2)

25.0 (85.3)

25.0 (85.3)

25.0 (85.3)

30.0 (102.4)

Capacity, kW (kBTUH), Optional Selection

10.0 (34.1)

10.0 (34.1)

10.0 (34.1)

15.0 (51.2)

15.0 (51.2)

15.0 (51.2)

20.0 (68.3)

25.0 (85.3)

25.0 (85.3)

25.0 (85.3)

30.0 (102.4)

22.0 (10.0)

22.0 (10.0)

22.0 (10.0)

22.0 (10.0)

Electric Reheat - SCR Control, Stainless Steel Fin Tubular (optional selection)
Capacity, kW (kBTUH)

15.0 (51.2)

15.0 (51.2)

15.0 (51.2)

HUMIDIFIER SECTION
Infrared Humidifier
Capacity, lb./hr. (kg/h)

11.0 (5.0)

11.0 (5.0)

11.0 (5.0)

FILTER SECTION - Disposable Type - Nominal Sizes and Quantities, Standard MERV 8 or Optional MERV 11
(filter types cannot be mixed, must be all MERV 8 or all MERV 11)
Downflow Models
Quantity

3

3

3

4

4

4

4

Nominal Size, inches

2 @ 25x20
1 @ 25x16

2 @ 25x20
1 @ 25x16

2 @ 25x20
1 @ 25x16

4 @ 25x20

4 @ 25x20

4 @ 25x20

4 @ 25x20

Nominal Size, inches

25x20

25x20

25x20

25x20

25x20

25x20

25x20

Upflow Models (Front & Rear return) Filters located in separate filter box on rear return, located on lower unit panel
Quantity

4

4

4

6

6

6

8

WATER COOLED SYSTEM - SEMI-HERMETIC Compressors, based on 75°F/45% room conditions with EC Fans
Condenser Flow Requirements - Maximum design water pressure 150psi (1034kPa), 350psi (2413kPa) available as option
THR, kBTUH (kW)

49.2 (167.7)

50.5 (172.3)

59.9 (204.3)

74.7 (255)

92.7 (316.5)

105.6 (360.4)

83°F (23.8°C) EWT, GPM (l/m)

28 (105.90)

29 (109.7)

34 (128.7)

43 (162.7)

53 (200.6)

60 (227.1)

139.3 (475.5)
79 (299.0)

Pressure Drop, ft. of water (kPa), with valve

8.9 (26.70)

9.5 (28.4)

12.8 (38.3)

11.2 (33.5)

16.6 (49.6)

20.9 (62.5)

31.3 (93.6)

STANDARD SCROLL
Compressors Only

WATER COOLED SYSTEM - DIGITAL SCROLL Compressors, based on 75°F/45% room conditions

Condenser Flow Requirements - Maximum design water pressure 150psi (1034kPa), 350psi (2413kPa) available as option; with EC Fans
THR, BTUH (kW)
83°F (23.8°C) EWT, GPM (l/m)
Pressure Drop, ft. of water (kPa), valve

41.6 (141.8)

49.8 (169.8)

57 (194.5)

75.8 (258.5)

95.3 (325.3)

107.2 (365.6)

134.7 (459.6)

24 (90.85)

28.5 (107.9)

32.5 (123)

44 (166)

55.5 (210.1)

62.5 (236.6)

78 (295.3)

6.6 (19.73)

9.2 (27.50)

11.8 (35.27)

11.7 (34.97)

18.1 (54.10)

22.6 (67.55)

30.6 (91.40)

PIPING CONNECTION SIZES -Water-Cooled Liebert DS Indoor Unit
Water Supply, O.D. Copper

1-5/8" (41)

1-5/8" (41)

1-5/8" (41)

2-1/8" (54)

2-1/8" (54)

2-1/8" (54)

2-1/8" (54)

Water Return, O.D. Copper

1-5/8

1-5/8" (41)

1-5/8" (41)

2-1/8" (54)

2-1/8" (54)

2-1/8" (54)

2-1/8" (54)

Infrared Humidifier, O.D. Copper

1/4

1/4

1/4

1/4

1/4

1/4

1/4

Condensate Drain, FPT

3/4

3/4

3/4

3/4

3/4

3/4

3/4

Condensate Drain w/Optional Condensate
Pump, OD

1/2

1/2

1/2

1/2

1/2

1/2

1/2

Hot Water Reheat, O.D. Copper

5/8

5/8

5/8

5/8

5/8

5/8

5/8

82.1 (280.1)

DUAL-COOL UNITS CAPACITY DATA, Water (0% Glycol), Net Capacity Data kW (kBTUH)
CAUTION: CuNi coil option must be specified when Econ-O-Coil is applied to open water tower.
75°F DB, 62.57 WB (23.9°C DB, 16.9°C WB) 45% RH, 45°F EWT, 55°F LWT; with EC Fans
26.2 (89.2)

29.8 (101.6)

32.2 (109.8)

49.9 (170.4)

58 (198.1)

57.7 (196.8)

Sensible Capacity, kW (kBTUH)

Total Capacity, kW (kBTUH)

24.9 (85)

28.8 (98.2)

31.6 (107.8)

46 (157.1)

53.2 (181.4)

54.3 (185.4)

4 (63.7)

Flow Rate, GPM (I/m) @ 10°F Rise

19 (1.2)

22.4 (1.4)

25.5 (1.6)

36.4 (2.3)

389 (1.9)

446 (2.2)

137.76 (2.2)

Pressure Drop, ft. (kPa), valve, coil

6.1 (18.23)

8.3 (24.81)

15.9 (47.6)

18 (53.80)

Econ-O-Coil Fluid Volume, gal (l)

5 (19.0)

5 (19.0)

5 (19.0)

8 (30.4)

8 (30.4)

8 (30.4)

10 (38.0)

Unit Volume, Without Econ-O-Coil, gal, (l)

4 (15.2)

4 (15.2)

4 (15.2)

7 (26.6)

7 (26.6)

7 (26.6)

8 (30.4)

10.50 (31.39) 10.40 (31.09) 17.2 (51.41)

FLUID VOLUMES

93

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Table 72

Performance data—Glycol-cooled units with EC fans

Model Size

028

035

042

053

070

077

105

CAPACITY DATA with EC Fans
Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor,
Semi-Hermetic Compressors with EC Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH) 36.7 (125.3)

38.2 (130.4)

43.9 (149.9)

57.1 (194.8)

70 (238.9)

77.9 (265.7)

101.5 (346.3)

Sensible kW (kBTUH) 36.4 (124.4)

38.2 (130.4)

43.9 (149.9)

56.7 (193.5)

69.7 (237.7)

77.3 (263.8)

97.7 (333.4)

80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 34.9 (119.1)

35.8 (122.3)

41.3 (141)

54.2 (185.1)

66.5 (226.8)

74.1 (252.9)

97.1 (331.4)

Sensible kW (kBTUH) 33.1 (112.9)

35.4 (120.9)

40.7 (138.8)

52.1 (177.6)

63.9 (218.1)

71.0 (242.2)

89.1 (304)

75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45.1% RH
Total kW (kBTUH) 33.3 (113.6)

33.9 (115.8)

39.2 (133.8)

51.6 (176)

63.3 (215.9)

70.8 (241.5)

92.9 (317.1)

Sensible kW (kBTUH) 29.4 (100.3)

31.5 (107.6)

36.2 (123.6)

46.4 (158.4)

57.0 (194.5)

63.2 (215.7)

79.0 (269.6)

72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH) 32.4 (110.6)
Sensible kW (kBTUH)

27.1 (92.4)

32.9 (112.3)

38.1 (130)

50.0 (170.6)

61.4 (209.7)

68.9 (235.2)

90.6 (309)

29.0 (98.9)

33.3 (113.6)

42.7 (145.5)

52.4 (178.8)

58.2 (198.5)

72.7 (248.1)

Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor
Scroll Compressors Only

Scroll or Digital Scroll compressors with EC Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH) 31.9 (108.7)

37.5 (128)

42.5 (145.2)

59.7 (203.6)

71.6 (244.5)

79.9 (272.6)

101.0 (344.6)

Sensible kW (kBTUH) 31.9 (108.7)

37.5 (128)

42.5 (145.2)

59.5 (203)

71.0 (242.2)

78.9 (269.2)

97.4 (332.3)

80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH)

30.2 (103)

Sensible kW (kBTUH) 30.1 (102.6)

35.3 (120.6)

40.1 (136.8)

56.7 (193.4)

68.3 (233.1)

76.3 (260.5)

96.9 (330.7)

35.1 (119.6)

39.8 (135.9)

54.8 (187)

65.1 (221.1)

72.3 (246.6)

89.0 (303.6)

75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45% RH
Total kW (kBTUH)
Sensible kW (kBTUH)

28.6 (97.6)

33.6 (114.7)

38.2 (130.2)

54.0 (184.1)

65.4 (223.2)

73.2 (249.8)

93.1 (317.6)

27.0 (92)

31.4 (107.1)

35.7 (121.8)

49.0 (167.2)

58.1 (198.4)

64.4 (219.7)

79.1 (270)

72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH)

27.7 (94.5)

Sensible kW (kBTUH)

24.8 (84.5)

32.7 (111.6)

37.1 (126.8)

52.4 (178.7)

63.8 (217.6)

71.4 (243.8)

90.9 (310.1)

28.9 (98.6)

32.8 (112.1)

45.1 (153.9)

53.6 (182.8)

59.3 (202.3)

72.9 (248.8)

FAN SECTION - Downflow Models - EC Fans Under Floor
Standard Air Volume,
CFM (CMH) 0.2" 4,400 (7,476) 5,200 (8,835) 6200 (10534) 8,000 (13,592) 9,600 (16,310) 11,000 (18,689) 13.700 (23,276)
external static
Standard Fan Motor,
nominal kW
(total for all fans)

2.8

2.8

2.8

2.5

4.0

5.9

7.8

Number of fans

1

1

1

2

2

2

3

1. Capacity data is rated and factory certified per ASHRAE 127-2012 with a 5% tolerance.
2. Some options or combinations of options may result in reduced air flow—consult factory for recommendations.
3. Digital scroll not available on 077 and 105 models; units available with semi-hermetic and standard scroll compressors only

Liebert® DS™

94

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Table 73

Performance Data—Glycol-cooled units with centrifugal fans

Model Size

028

035

042

053

070

077

105

CAPACITY DATA WITH CENTRIFUGAL FANS
Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor, Semi-Hermetic Compressors
Semi-Hermetic Compressors with Centrifugal Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH) 36.1 (123.1) 37.2 (126.8) 42.3 (144.4) 57.1 (194.8) 68.3 (233.2) 75.9 (258.8)

99.8 (340.4)

Sensible kW (kBTUH) 35.8 (122.2) 37.2 (126.8) 42.3 (144.4) 56.7 (193.5) 67.4 (229.9) 74.7 (254.9)

96.0 (327.4)

80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 34.2 (116.9) 34.8 (118.8) 39.6 (135.3) 54.2 (185.1)

65 (221.8)

72.3 (246.6)

Sensible kW (kBTUH) 32.4 (110.7) 34.4 (117.3) 39.1 (133.4) 52.1 (177.6) 61.5 (209.7) 68.1 (232.5)

95.4 (325.5)
87.3 (298)

75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45% RH
Total kW (kBTUH) 32.7 (111.4) 32.9 (112.3)
Sensible kW (kBTUH) 28.7 (98.1)

69.1 (235.6)

91.2 (311.2)

30.5 (104.1) 34.7 (118.3) 46.4 (158.4) 54.6 (186.4) 60.4 (206.2)

37.5 (128)

51.6 (176)

62 (211.5)

77.3 (263.7)

72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH) 31.8 (108.4) 31.9 (108.8) 36.4 (124.2)
Sensible kW (kBTUH) 26.4 (90.2)

28.0 (95.4)

50 (170.6)

60.3 (205.7) 67.3 (229.5)

88.8 (303)

31.7 (108.2) 42.7 (145.5) 50.2 (171.4) 55.5 (189.5)

71 (242.2)

Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor
Scroll Compressors Only

Scroll or Digital Scroll Compressors with Centrifugal Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH

77.9 (265.7)

99.3 (338.7)

Sensible kW (kBTUH) 31.2 (106.5) 36.5 (124.5) 40.8 (139.4) 57.8 (197.1) 68.7 (234.3) 76.1 (259.8)

Total kW (kBTUH) 31.2 (106.5) 36.5 (124.5) 40.8 (139.4) 58.4 (199.3)

70.1 (239)

95.6 (326.3)

80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 29.6 (100.8)

34.3 (117)

38.3 (130.8) 55.6 (189.8) 66.9 (228.3) 74.5 (254.3)

95.2 (324.8)

Sensible kW (kBTUH) 29.4 (100.4)

34 (116.1)

38.1 (130.2) 52.9 (180.5) 62.6 (213.5) 69.4 (236.7)

87.2 (297.7)

75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45% RH
Total kW (kBTUH)

28 (95.4)

Sensible kW (kBTUH) 26.3 (89.8)

32.6 (111.2)

36.4 (124)

30.3 (103.5) 34.1 (116.3)

53.1 (181.1) 64.1 (218.8)
47.2 (161)

71.5 (244)

55.7 (190.1) 61.6 (210.1)

91.3 (311.6)
77.4 (264)

72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH)

27 (92.3)

Sensible kW (kBTUH) 24.1 (82.3)

31.7 (108.1) 35.3 (120.6) 51.5 (175.7) 62.6 (213.5) 69.8 (238.1)
27.9 (95)

31.2 (106.5) 43.4 (148.1) 51.3 (175.2) 56.7 (193.4)

89.1 (304.2)
71.2 (242.9)

FAN SECTION - Downflow Models - Fixed Pitch, Two Belts
Standard Air Volume,
CFM (CMH) 0.2" external
static

4,400
(7,476)

5,200
(8,835)

6,300
(10,704)

7,500
(12,743)

9,000
(15,291)

10,400
(17,670)

13,700
(23,276)

Standard Fan Motor hp
(kW)

2 (1.5)

3 (2.2)

5.0 (3.7)

3 (2.2)

5 (3.7)

7.5 (5.6)

10.0 (7.5)

1

1

1

2

2

2

3

Number of Fans
1.
2.
3.

Capacity data is rated and factory certified per ASHRAE 127-2012 with a 5% tolerance.
Some options or combinations of options may result in reduced air flow—consult factory for recommendations.
Digital scroll not available on 077 and 105 models; units available with semi-hermetic and standard scroll compressors only

95

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Table 74

Physical data—Glycol-cooled units
Model Size

028

035

042

053

070

077

105

EVAPORATOR COIL - A-Frame - Copper Tube/Aluminum Fin
Face Area, sq. ft. (sq. m)
Rows of Coil

17.1 (1.6)
3

17.1 (1.6)

17.1 (1.6)

24.7 (2.3)

24.7 (2.3)

24.7 (2.3)

32.3 (3.0)

3

3

3

3

3

3

REHEAT SECTION
Electric Reheat - Three-Stage, Stainless Steel Fin Tubular, Capacity Does Not Include Fan Motor Heat
Capacity, kW (kBTUH), Standard
Selection

15.0 (51.2)

15.0 (51.2)

15.0 (51.2)

25.0 (85.3)

25.0 (85.3)

25.0 (85.3)

30.0 (102.4)

Capacity, kW (kBTUH), Optional
Selection

10.0 (34.1)

10.0 (34.1)

10.0 (34.1)

15.0 (51.2)

15.0 (51.2)

15.0 (51.2)

20.0 (68.3)

25.0 (85.3)

25.0 (85.3)

25.0 (85.3)

30.0 (102.4)

22.0 (10.0)

22.0 (10.0)

22.0 (10.0)

22.0 (10.0)

Electric Reheat - SCR Control, Stainless Steel Fin Tubular (Optional Selection)
Capacity, kW (kBTUH)

15.0 (51.2)

15.0 (51.2)

15.0 (51.2)

HUMIDIFIER SECTION
Infrared Humidifier
Capacity, lb/hr (kg/h)

11.0 (5.0)

11.0 (5.0)

11.0 (5.0)

FILTER SECTION - Disposable Type - Nominal Sizes and Quantities, Standard MERV 8 or Optional MERV 11
(filter types cannot be mixed, must be all MERV 8 or all MERV 11)
Downflow Models
Quantity

3

@ 25x20
Nominal Size, inches 2
1 @ 25x16

3

3

4

4

4

4

2 @ 25x20
1 @ 25x16

2 @ 25x20
1 @ 25x16

4 @ 25x20

4 @ 25x20

4 @ 25x20

4 @ 25x20

Upflow Models (Front & Rear Return) Filters located in separate filter box on rear return, located on lower unit panel
Quantity
Nominal Size, inches

4

4

4

6

6

6

8

25x20

25x20

25x20

25x20

25x20

25x20

25x20

OUTDOOR DRYCOOLERS - STANDARD 95°F AMBIENT SELECTION; SEE Table 103 FOR OTHER SELECTIONS
Model Number

D-174

D-174

D-197

D-260

D-310

D-350

D-466

Number of Fans

2

2

2

3

3

3

4

CONDENSER FLOW REQUIREMENTS—with 40% ethylene glycol
GLYCOL-COOLED SYSTEM -Semi-Hermetic Compressors, based on 75°F/45% room conditions with EC fans
THR, kBTUH (kW) 45.4 (154.9) 46.6 (159.1)

55.4 (189)

69.8 (238.3) 87.2 (297.7) 100.2 (341.8) 133.9 (456.9)

104°F (40°C) EGT, GPM (l/m)

32 (121.1)

33.5 (135)

39 (148)

49 (185)

62 (234.7)

70 (265)

96 (363)

Pressure Drop, ft. of water (kPa),

12.9 (38.5)

14 (41.9)

18.6 (55.7)

16 (47.7)

25 (74.7)

31.3 (93.6)

50.6 (151.3)

GLYCOL-COOLED SYSTEM - Digital Scroll Compressors, based on 75°F/45% room conditions
with EC Fans
THR, BTUH (kW) 39.4 (134.5) 47.6 (162.4) 54.7 (186.8)
104°F (40°C) EGT, GPM (l/m)

28 (106)

33.5 (127)

39 (148)

72.7 (248)
52 (163.5)

Standard Scroll
Compressors
with EC Fans

91.2 (311.1) 103.7 (353.7)
64 (242)

73.5 (278)

129 (440.1)
91.5 (264.9)

Pressure Drop, ft. of water (kPa) 10.0 (29.80) 14.0 (41.85) 18.6 (55.60) 17.9 (53.50) 26.6 (79.51) 34.4 (102.82) 46.2 (138.09)
PIPING CONNECTION SIZES - Glycol-Cooled Liebert DS Indoor Unit
Glycol Supply, O.D. Copper

1-5/8" (41)

1-5/8" (41)

1-5/8" (41)

2-1/8" (54)

2-1/8" (54)

2-1/8" (54)

2-1/8" (54)

Glycol Return, O.D. Copper

1-5/8" (41)

1-5/8" (41)

1-5/8" (41)

2-1/8" (54)

2-1/8" (54)

2-1/8" (54)

2-1/8" (54)

Infrared Humidifier, O.D. Copper

1/4

1/4

1/4

1/4

1/4

1/4

1/4

Condensate Drain, FPT

3/4

3/4

3/4

3/4

3/4

3/4

3/4

Condensate Drain w/Optional
Condensate Pump, OD

1/2

1/2

1/2

1/2

1/2

1/2

1/2

Hot Water Reheat, O.D. Copper

5/8

5/8

5/8

5/8

5/8

5/8

5/8

Liebert® DS™

96

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Table 75

Performance data—GLYCOOL units with EC fans

Model Size

028

035

042

053

070

077

105

CAPACITY DATA with EC Fans
Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor,
Semi-Hermetic Compressors with EC Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH) 36.5 (124.6)

37.9 (129.3)

43.5 (148.4)

58.0 (197.9)

69.3 (236.3)

77.3 (263.7)

100.4 (342.6)

Sensible kW (kBTUH) 36.3 (123.7)

37.9 (129.3)

43.5 (148.4)

58.0 (197.8)

68.9 (235.1)

76.1 (259.7)

96.3 (328.7)

80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 34.7 (118.4)

35.5 (121.2)

40.9 (139.5)

54.9 (187.4)

65.7 (224.2)

73.7 (251.5)

96.1 (327.8)

Sensible kW (kBTUH) 32.9 (112.3)

35.1 (119.8)

40.2 (137.2)

53.4 (182.3)

63.2 (215.5)

69.5 (237.2)

87.7 (299.1)

75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45.1% RH
Total kW (kBTUH) 33.1 (112.9)
Sensible kW (kBTUH)

29.2 (99.6)

33.6 (114.7)

38.8 (132.3)

52.1 (177.7)

62.5 (213.3)

70.5 (240.5)

91.9 (313.7)

31.2 (106.6)

35.8 (122)

47.8 (163)

56.3 (192)

61.8 (210.9)

77.7 (265.1)

72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH) 32.2 (109.9)
Sensible kW (kBTUH)

26.9 (91.7)

32.6 (111.2)

37.7 (128.6)

50.4 (172.1)

60.7 (207.1)

68.7 (234.4)

89.6 (305.6)

28.7 (97.9)

32.8 (112)

43.9 (149.8)

51.7 (176.2)

56.9 (194.2)

71.5 (243.8)

Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor
Scroll Compressors Only

Scroll or Digital Scroll compressors with EC Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH)

31.7 (108)

37.2 (127.1)

42.1 (143.5)

59.1 (201.6)

70.9 (241.9)

77.3 (263.7)

99.9 (340.9)

Sensible kW (kBTUH)

31.7 (108)

37.2 (127.1)

42.1 (143.5)

58.9 (201.1)

70.2 (239.6)

75.6 (257.9)

96.0 (327.6)

80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH)

30 (102.4)

35.1 (119.6)

39.6 (135.1)

56.1 (191.4)

67.6 (230.6)

73.9 (252.3)

95.9 (327.1)

Sensible kW (kBTUH)

29.9 (102)

34.8 (118.6)

39.3 (134.1)

54.2 (185.1)

64.3 (219.5)

68.8 (234.8)

91.2 (298.8)

75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45% RH
Total kW (kBTUH)

28.4 (96.9)

33.3 (113.7)

37.6 (128.5)

53.4 (182.3)

64.7 (220.7)

70.9 (242)

92.0 (314.1)

Sensible kW (kBTUH)

26.8 (91.4)

31.1 (106.1)

35.2 (120.1)

48.5 (165.5)

57.4 (195.8)

61.0 (208.3)

77.8 (265.4)

72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH)

27.5 (93.8)

Sensible kW (kBTUH)

24.6 (83.9)

32.4 (110.7)

36.6 (125)

51.8 (176.9)

63.0 (215)

69.2 (236.1)

89.9 (306.6)

28.6 (97.6)

32.3 (110.4)

44.6 (152.2)

52.8 (180.2)

56.1 (191.5)

71.6 (244.5)

FAN SECTION - Downflow Models - EC Fans Under Floor
Standard Air Volume,
CFM (CMH) 0.2" 4,400 (7,476) 5,200 (8,835) 6200 (10,534)
external static

8,000 (13,592) 9,600 (16,310) 10,400 (17670)

13,500 (22937)

Standard Fan Motor,
nominal kW
(total for all fans)

2.8

2.8

2.8

2.5

4.0

5.9

7.8

Number of fans

1

1

1

2

2

2

3

1. Capacity data is rated and factory certified per ASHRAE 127-2012 with a 5% tolerance.
2. Some options or combinations of options may result in reduced air flow—consult factory for recommendations.
3. Digital scroll not available on 077 and 105 models; units available with semi-hermetic and standard scroll compressors only

97

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Table 76

Performance data—GLYCOOL units with centrifugal fans

Model Size

028

035

042

053

070

077

105

CAPACITY DATA WITH CENTRIFUGAL FANS
Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor, Semi-Hermetic Compressors
Semi-Hermetic Compressors with Centrifugal Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH) 35.9 (122.4) 36.8 (125.7) 41.9 (142.8) 56.6 (193.2) 67.6 (230.8)

74.9 (255.7)

98.6 (336.5)

Sensible kW (kBTUH) 35.6 (121.5) 36.8 (125.7) 41.9 (142.8) 56.2 (191.9) 66.7 (227.5)

73.8 (251.7)

94.6 (322.6)

71.4 (243.5)

94.3 (321.7)

60.8 (207.3)

67.2 (229.2)

89.5 (293)

61.3 (209)

68.1 (232.4)

90.1 (307.6)

53.9 (184)

59.4 (202.8)

75.9 (258.9)

59.6 (203.3)

66.3 (226.4)

87.8 (299.5)

49.5 (169)

54.6 (186.2)

69.7 (237.7)

80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 34.1 (116.2) 34.5 (117.7) 39.2 (133.7) 53.8 (183.4) 64.3 (219.4)
Sensible kW (kBTUH)

32.3 (110)

34.1 (116.3) 38.6 (131.9)

51.6 (176)

75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45% RH
Total kW (kBTUH) 32.5 (110.7) 32.6 (111.1) 37.1 (126.5) 51.1 (174.4)
Sensible kW (kBTUH)

28.5 (97.4)

30.2 (103)

34.2 (116.7) 45.9 (156.8)

72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH) 31.6 (107.7) 31.6 (107.7) 35.9 (122.7)
Sensible kW (kBTUH)

26.2 (89.5)

27.6 (94.3)

49.5 (169)

31.2 (106.6) 42.2 (143.9)

Net Capacity Data kW (BTUH), Standard Air Volume and Evaporator Fan Motor
Scroll Compressors Only

Scroll or Digital Scroll Compressors with Centrifugal Fans
85°F DB, 64.5°F WB, 52.3°F DP (29.4°C DB, 18.1°C WB) 32.4% RH
Total kW (kBTUH)

31 (105.8)

36.2 (123.5) 40.4 (137.8) 57.9 (197.4) 69.3 (236.6)

76.8 (262)

98.1 (334.8)

Sensible kW (kBTUH)

31 (105.8)

36.2 (123.5) 40.4 (137.8) 57.2 (195.3) 67.9 (231.8)

75.1 (256.2)

94.2 (321.5)

37.9 (129.3) 55.1 (187.9) 66.2 (225.9)

73.4 (250.6)

94.1 (321)

33.7 (115.1) 37.7 (128.6) 52.4 (178.8) 61.9 (211.1)

68.3 (233.1)

89.4 (292.7)

70.4 (240.3)

90.3 (307.9)

55 (187.6)

60.5 (206.6)

76 (259.3)

61.9 (211.1)

68.7 (234.4)

88.1 (300.5)

42.9 (146.4) 50.6 (172.7)

55.6 (189.8)

69.9 (238.3)

80°F DB, 62.9°F WB, 52.3°F DP (26.7°C DB, 17.1°C WB) 38.2% RH
Total kW (kBTUH) 29.4 (100.2)
Sensible kW (kBTUH)

29.2 (99.8)

34 (116.1)

75°F DB, 61.1°F WB, 52.3°F DP (23.9°C DB, 16.2°C WB) 45% RH
Total kW (kBTUH)

27.8 (94.7)

Sensible kW (kBTUH)

26.1 (89.1)

32.3 (110.2) 35.9 (122.5) 52.5 (179.1) 63.4 (216.4)
30 (102.5)

33.6 (114.7) 46.7 (159.2)

72°F DB, 60.0°F WB, 52.3°F DP (22.2°C DB, 15.6°C WB) 49.9% RH
Total kW (kBTUH)

26.9 (91.6)

31.4 (107.1)

34.9 (119)

Sensible kW (kBTUH)

23.9 (81.7)

27.6 (94.1)

30.8 (105)

51 (174)

FAN SECTION - Downflow Models - Fixed Pitch, Two Belts
Standard Air Volume,
CFM (CMH) 0.2"
external static

4,400
(7,476)

5,200
(8,835)

6,300
(10,704)

7,500
(12,743)

9,000
(15,291)

10,400
(17,670)

13,700
(23,276)

Standard Fan Motor
hp (kW)

2 (1.5)

3 (2.2)

5.0 (3.7)

3 (2.2)

5 (3.7)

7.5 (5.6)

10.0 (7.5)

1

1

1

2

2

2

3

Number of Fans
1.
2.
3.

Capacity data is rated and factory certified per ASHRAE 127-2012 with a 5% tolerance.
Some options or combinations of options may result in reduced air flow—consult factory for recommendations.
Digital scroll not available on 077 and 105 models; units available with semi-hermetic and standard scroll compressors only

Liebert® DS™

98

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Table 77

Physical data—GLYCOOL units
Model Size

028

035

042

053

070

077

105

EVAPORATOR COIL - A-Frame - Copper Tube/Aluminum Fin
Face Area, sq. ft. (sq. m)
Rows of Coil

17.1 (1.6)

17.1 (1.6)

17.1 (1.6)

24.7 (2.3)

24.7 (2.3)

24.7 (2.3)

32.3 (3.0)

3

3

3

3

3

3

3

REHEAT SECTION
Electric Reheat - Three-Stage, Stainless Steel Fin Tubular, Capacity Does Not Include Fan Motor Heat
Capacity, kW (kBTUH), Standard
Selection

15.0 (51.2)

15.0 (51.2)

15.0 (51.2)

25.0 (85.3)

25.0 (85.3)

25.0 (85.3)

30.0 (102.4)

Capacity, kW (kBTUH), Optional
Selection

10.0 (34.1)

10.0 (34.1)

10.0 (34.1)

15.0 (51.2)

15.0 (51.2)

15.0 (51.2)

20.0 (68.3)

25.0 (85.3)

25.0 (85.3)

25.0 (85.3)

30.0 (102.4)

22.0 (10.0)

22.0 (10.0)

22.0 (10.0)

22.0 (10.0)

Electric Reheat - SCR Control, Stainless Steel Fin Tubular (Optional Selection)
Capacity, kW (kBTUH)

15.0 (51.2)

15.0 (51.2)

15.0 (51.2)

HUMIDIFIER SECTION
Infrared Humidifier
Capacity, lb/hr (kg/h)

11.0 (5.0)

11.0 (5.0)

11.0 (5.0)

FILTER SECTION - Disposable Type - Nominal Sizes and Quantities, Standard MERV 8 or Optional MERV 11
(filter types cannot be mixed, must be all MERV 8 or all MERV 11)
Downflow Models
Quantity
Nominal Size, inches

3

3

3

4

4

4

4

2 @ 25x20
1 @ 25x16

2 @ 25x20
1 @ 25x16

2 @ 25x20
1 @ 25x16

4 @ 25x20

4 @ 25x20

4 @ 25x20

4 @ 25x20

Upflow Models (Front & Rear Return) Filters located in separate filter box on rear return, located on lower unit panel
Quantity
Nominal Size, inches

4

4

4

6

6

6

8

25x20

25x20

25x20

25x20

25x20

25x20

25x20

OUTDOOR DRYCOOLERS - STANDARD 95°F AMBIENT SELECTION; SEE Table 103 FOR OTHER SELECTIONS
Model Number
Number of Fans

D-174

D-174

D-197

D-260

D-310

D-350

D-466

2

2

2

3

3

3

4

CONDENSER FLOW REQUIREMENTS—40% Ethylene Glycol
GLYCOOL SYSTEM - Semi-Hermetic Compressors, Based on 75°F/45% Room Conditions with EC Fans
THR, kBTUH (kW) 45.4 (154.9)
104°F (40°C) EGT, GPM (l/m)

32 (121)

46.6 (159)
33 (125)

55.5 (189.2) 70.6 (240.8) 87.2 (297.7)
40 (151)

49 (185)

62 (235)

Pressure Drop, ft. of water (kPa), 12.9 (38.50) 13.6 (40.60) 19.6 (58.59) 16.0 (47.83) 25.0 (74.73)
GLYCOOL SYSTEM - Digital Scroll Compressors, Based on 75°F/45% Room Conditions with EC Fans
THR, BTUH (kW) 39.4 (134.5) 47.6 (162.4) 54.7 (186.8)
104°F (40°C) EGT, GPM (l/m)

28 (98.4)

33.5 (127)

39 (148)

72.7 (248)

99.4 (339.3)

133.6 (455.9)

71 (269)

95 (360)

32.2 (96.25)

49.6 (148.30)

Standard Scroll
with EC Fans

91.2 (311.1) 102.9 (351.1) 128.7 (439.1)

51 (193)

64 (242)

Pressure Drop, ft. of water (kPa) 10.0 (29.89) 14.0 (41.85) 18.6 (55.60) 17.2 (51.41) 26.6 (79.51)

72 (273)

89 (337)

33.1 (98.84)

43.8 (130.92)

PIPING CONNECTION SIZES - Glycol-Cooled Liebert DS Indoor Unit
Glycol Supply, O.D. Copper

1-5/8" (41)

1-5/8" (41)

1-5/8" (41)

2-1/8" (54)

2-1/8" (54)

2-1/8" (54)

2-1/8" (54)

Glycol Return, O.D. Copper

1-5/8" (41)

1-5/8" (41)

1-5/8" (41)

2-1/8" (54)

2-1/8" (54)

2-1/8" (54)

2-1/8" (54)

Infrared Humidifier, O.D. Copper

1/4

1/4

1/4

1/4

1/4

1/4

1/4

Condensate Drain, FPT

3/4

3/4

3/4

3/4

3/4

3/4

3/4

Condensate Drain w/Optional
Condensate Pump, OD

1/2

1/2

1/2

1/2

1/2

1/2

1/2

Hot Water Reheat, O.D. Copper

5/8

5/8

5/8

5/8

5/8

5/8

5/8

ECON-O-COIL CAPACITY DATA (GLYCOOL Units), 40% Ethylene Glycol, Net Capacity Data, kW (kBTUH)

75°F DB, 62.57°FWB (23.9°C, 16.9°C) 45% RH, 45°F EGT Room Conditions with EC Fans
Total capacity kW(kBTUH)

24.3 (82.8)

27.5 (93.9)

30.4 (103.9) 45.9 (156.8) 53.4 (182.3)

57.2 (182.3)

71.3 (243.3)

Sensible Capacity

24.1 (82.4)

27.5 (93.9)

30.4 (103.9) 44.7 (152.6) 51.8 (176.9)

55.3 (176.9)

69.8 (238.2)

28 (106)

33.5 (127)

72 (273)

89 (337)

Flow rate, GPM (l/m)
Pressure Drop, ft. of water (kPa)

18.4 (55.0)

39 (148)

51 (193)

64 (242)

25.7 (76.82) 33.8 (101.03) 38.9 (116.27) 59.1 (176.65) 73.5 (219.70) 75.2 (224.78)
FLUID VOLUMES

Unit Volume Without
Econ-O-Coil, gal (l)

4 (15.2)

4 (15.2)

4 (15.2)

7 (26.6)

7 (26.6)

7 (26.6)

8 (30.4)

Unit Volume with Econ-O-Coil, gal (l)

9 (34.2)

9 (34.2)

9 (34.2)

14 (53.2)

14 (53.2)

14 (53.2)

17 (64.6)

99

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Table 78

Model
#

Reheat
Options

Electric
Standard, kW

None

Electric
Standard kW

None

Electric,
Downsized kW

Electric,
Downsized kW

Humidifier
Options

Infrared

Infrared

None

None

Humidifier

No Humidifier

230 460 575 208

230 460 575 208

Volts
FLA

DS028

DS035

Electrical data—Water/glycol-cooled systems with EC fans

230 460 575

208

67.3 64.8 32.1 25.5 56.3 54.1 26.9 24.2 67.3 64.8 32.1 25

208

43

WSA

82

OPD

80

90

35

30

82
80

78.9 39.2 30.5 47.3
80

40

30

60

90

45

30

80

80

78.2 75.9 37.7 33

78.1 75.9 37.7 33

46

36

85.2

83

110

50

45

110

110

78.2 75.7 37.5 29.4 64.8

41.2 35.8 95.7 92.5
50

45

30

110

110

46

36

71.9

50

40

100

30

25

70

70

35

30

70

49.8 23.7 17.8 63.1 60.9 29.5 25.2 56.9

70

45

460 575

62.8 31.1 24.1

60

70

90

230

47.3 23.3 18.5 64.8 62.8 31.1 25.9 64.8

40

90

208

51.9 25.6 19.9

55

30

230 460 575

21.1 16.8 56.3 54.1 26.9 24.2 53.5

55

95.7 92.5
110

43

32 27.1 86.3 83.2 40.8 31.1

FLA

26.2 19.7
35

25

69

67

80

80

32.7 27.1
40

30

64.8 31.9 25.6 78.1 75.9 37.7 33
71.9 35.4 28.4 85.2

83

100

110

45

70

35

25

55.3 26.9 20.4

69

67

80

80

32.7 24.8
35

25

64.8

64.8 31.9 25.6

41.2 35.8 78.4

76.4 37.8 29.6

45

100

100

82.6 40.8 30.4 109.2 104.8 52.4 42

92.1

89.6 44.1 33.5

35

110

50

45

35

FLA

119.9 116 57.1 43.5 109.2 104.8 52.4 42 119.9 116 57.1 43.5 82.6

WSA

145.3 140.4 69.4 53.9 117.2 112.8 56.5 45 145.3 140.4 69.4 52.8 90.6 90.62 44.9 33.4 117.2 112.8 56.5 45 110.52 107.4 53.1 40.3
150

150

70

50

125

125

70

50

150

150

70

50

110

110

60

45

125

125

70

50

125

125

60

45

FLA

129.2 125.3 59.9 46.4 127.8 123.4 58 46.4 129.2 125.3 59.9 45.7 101.2 101.2 46.4 34.8 127.8 123.4 58 46.4 101.4 101.2 46.9 35.7

WSA

156.9 152 72.9 55.5 138.2 133.8 62.8 50 156.9 152.0 72.9 55.5 111.6 111.6 51.2 38.4 138.2 133.8 62.8 50 122.15 119.02 56.6 43
175

175

80

60

175

175

80

139.2 134.8 61.4 50 139.2 134.8 61

60

80

60

50 134.9 131 61.4 47.5 112.6 112.6 49.4 38.4 139.2 134.8 61

175

175

80

60

150

150

70

50

50

175

175

150

150

70

50

112.6 112.6 49.4 38.4

WSA

164 159.2 74.8 57.8 151. 146.6 66.2 54 164.0 159.2 74.8 57.8 124.37 124.4 54.6 42.4 151 146.6 66.2 54 129.27 126.15 58.5 45.3

OPD

175

175

80

70

175

175

80

70

175

175

80

60

150

150

70

50

175

175

80

70

150

150

70

50

FLA

171.5 167.1 83.7 69.1 171.5 167.1 83.7 69.1 164 163.5 79.8 62.6 144.9 144.9 72.1 57.5 171.5 167.1 83.7 69.1 144.9 144.9 72.1 57.5

WSA

198.8 198.2 97.4 76.4 186.5 182.1 91.6 75.4 198.8 198.2 97.4 76.4 159.9 159.9 80 63.8 186.5 182.1 91.6 75.4 169.3 165.5 81.3 63.9

OPD
1.
2.
3.
4.
5.
6.

70

WSA

FLA

DS105

70

70.7 68.2 33.4 25.5 63.1 60.9 29.5 25.2 70.7 68.2 33.4 25.5 49.8

OPD

DS077

30

86.3 83.2 40.8 31.9 68.3 66.1

OPD

DS070

40

FLA

OPD

DS053

80

WSA
OPD

DS042

78.9 39.2 31.9 60.6 58.4 29.1 25.9

230 460 575 208

225

225 110 100 225

225 110 100 225

225 110 90

Reduced reheat for 028, 035, and 042 models is 10kW.
Reduced reheat for 053, 070, and 077 models is 15kW.
Consult local representative for SCR reheat values.
Reduced reheat for 105 kW models is 20kW.
SCCR - Short Circuit Current Rating 65,000 amps rms symmetrical maximum.
Steam canister humidifiers available on downflow models with centrifugal fans.

Liebert® DS™

100

200

200 110 80

225

225 110 100

200

200

110 80

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Table 79

Electrical data—Water/glycol-cooled systems with centrifugal fans

Reheat Options

Electric, Std. kW

None

Electric, Std. kW

None

Humidifier
Options

Infrared or Steam
Generating Canister

Infrared or Steam
Generating Canister

None

None

Model
028

028

035

035

042

042

Motor
hp
Volts
2.0

3.0

3.0

5.0

5.0

7.5

3.0

5.0

5.0

077

7.5

7.5

10.0

10.0

15.0

208

230

460

575

208

230

460

575

20.8 16.5

31.8

25.2

55.4

52.5

26.6

23.9

66.4

63.2

31.8

24.7

42.1

41.4

31.5

59.7

56.8

28.8

25.6

81.1

77.3

38.9

30.2

46.4

45.7

23

18.2

OPD

80

80

40

30

70

70

35

30

80

80

40

30

60

60

30

25

FLA

69.5

66.0

33.2

26.4

58.5

55.3

28.0

25.1

69.5

66.0

33.2

25.9

45.2

44.2

22.2 17.7

WSA

84.2

80.1

40.3

33

62.8

59.6

30.2

26.8

84.2

80.1

40.3

31.4

49.5

48.5

24.4 19.4

OPD

90

80

40

30

80

70

35

30

90

80

40

30

60

60

FLA

72.9

69.4

34.5

26.4

65.3

62.1

30.6

26.1

72.9

69.4

34.5

26.4

52.0

51.0

24.8 18.7

WSA

88.5

84.4

41.9

33.0

70.5

67.3

33.1

28.0

88.5

84.4

41.9

32.0

57.2

56.2

27.3 20.6

OPD

90

90

45

35

90

80

40

35

90

90

45

35

70

70

FLA

79.0

75.0

37.3

28.6

71.4

67.7

33.4

28.3

79.0

75.0

37.3

28.6

58.1

56.6

27.6 20.9

WSA

94.6

90.0

44.7

35.8

76.6

72.9

35.9

30.2

94.6

90.0

44.7

34.2

63.3

61.8

30.1 22.8

OPD

100

100

45

35

90

90

45

35

100

100

45

35

80

80

FLA

86.5

82.7

41.6

36.1

86.4

82.7

41.6

36.1

86.5

82.5

41.4

32.5

73.1

71.6

35.8 28.7

WSA

104

99.3

49.9

39.1

93.5

89.8

45.1

38.9 104.0

99.3

49.9

39.1

80.2

78.7

39.3 31.5

OPD

110

110

50

50

110

110

50

50

110

110

50

45

100

100

FLA

94.0

89.5

45.0

39.0

93.9

89.5

45.0

39.0

94.0

89.3

44.8

35.4

80.6

78.4

39.2 31.6

WSA

111.5 106.1

53.3

42.0 101.0

41.8 111.5 106.1

53.3

42.0

87.7

85.5

42.7 34.4

60

45

110

110

125

110

40

50

25

30

40

96.6

48.5

125

110

60

41

101.4

96

49.2

39.5 112.1 107.2

53.9

41

74.8

73.8

37.6 27.9

53.3

42.5 137.5 131.6

66.2

50.3

82.8

81.8

41.7 30.9

70

50

110

110

53.9

WSA

137.5 131.6

66.2

125

35

25

50

112.1 107.2
150

30

60

FLA

70

50.8 109.4 104.0
50

125

125

60

50

50

125

150

110

125

50

50

45

40

FLA

118.2 112.8

56.7

43.2 107.5 101.6

52.0

41.7 118.2 112.8

56.7

43.2

80.9

79.4

40.4 30.1

WSA

143.6 137.2

69.0

53.5 115.5 109.6

56.1

44.7 143.6 137.2

69.0

52.5

88.9

87.4

44.5 33.1

70

50

110

110

60

45

99.5

98

46

34.5

150

150

70

50

125

125

70

50

150

150

FLA

127.5 122.1

59.5

46.1 126.1 120.2

57.6

46.1 127.5 122.1

59.5

45.4

WSA

155.2 148.8

72.5

55.2 136.5 130.6

62.4

49.7 155.2 148.8

72.5

55.2 109.9 108.4 50.8 38.1

175

150

80

60

175

150

80

60

175

150

80

60

150

125

70

50

FLA

135.0 128.9

62.9

49.0 133.6 127.0

61.0

49.0 135.0 128.9

62.9

48.3 107.0 104.8 49.4 37.4

WSA

162.7 155.6

75.9

58.1 144.0 137.4

65.8

52.6 162.7 155.6

75.9

58.1 117.4 115.2 54.2 41.0

OPD

175

175

80

FLA

145

138.4

64.4

52.6 145.0 138.4

64.0

52.6 140.7 134.6

64.4

50.1 118.4 116.2 52.4 41.0

169.8 162.8

77.8

60.4 156.8 150.2

69.2

56.6 169.8 162.8

77.8

60.4 130.2 128.0 57.6 45.0

WSA

200

175

90

60

70

175

200

175

80

175

80

60

70

175

175

175

175

80

90

60

70

150

175

150

175

70

70

50

60

FLA

151.6 144.4

67.4

54.6 151.6 144.4

67.0

54.6 147.3 140.6

67.4

52.1 125.0 122.2 55.4 43.0

WSA

176.4 168.8

80.8

62.4 163.4 156.2

72.2

58.6 176.4 168.8

80.8

62.4 136.8 134.0 60.6 47.0

200

200

90

200

200

90

175

125

100

78.6 192.3 184.2

250

225

72.6 169.9 166.6

90

125

100

95.4

78.6 185.3 180.6

225

225

84.5

70

175

110

90

225

148

80

60

200

76.8 61.0
110

90

FLA

192.3 184.2

WSA

220.1 215.3 109.1 85.9 220.1 215.3 109.1 85.9 220.1 215.3 109.1 85.9 181.2 177.0 91.7 73.3
250

250

125

100

250

250

125

100

250

250

91.5

66.1 150.8

175

204.7 201.3 102.1 79.9 204.7 201.3 102.1 79.9 204.7 201.3 102.1 79.9 165.8 163.0 84.7 67.3
95.4

88.4

200

WSA

225

72.6 177.4 170.2

70

177.4 170.2
250

88.4

70

FLA

OPD
1.
2.
3.
4.
5.

575

38.9

OPD
105

460

63.2

OPD
105

230

77.3

OPD
077

208

66.4

OPD
070

575

81.1

OPD
070

460

FLA

OPD
053

230

WSA

OPD
053

208

125

72.1 166.2 162.0 83.8 67.0
100

225

225

110

90

Reduced reheat for 028, 035, and 042 models is 10kW.
Reduced reheat for 053, 070, and 077 models is 15kW.
Consult local representative for SCR reheat values.
Reduced reheat for 105 kW models is 20kW.
SCCR - Short Circuit Current Rating 65,000 amps rms symmetrical maximum.

101

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Table 79

Electrical data—Water/glycol-cooled systems with centrifugal fans (continued)

Reheat Options

Electric, Downsized kW

Humidifier Options

Infrared or Steam Generating Canister

None

Model

Motor, hp

Volts

208

230

460

575

208

230

460

575

FLA

55.4

52.5

26.6

23.9

52.6

50.3

25.3

19.6

028

2.0

WSA

63.9

61.2

30.8

25.6

63.9

61.2

30.8

23.8

028

3.0

035

3.0

035

5.0

042

5.0

042

7.5

053

3.0

053

5.0

070

5.0

070

7.5

077

077

105

105
1.
2.
3.
4.
5.

7.5

10.0

10.0

15.0

OPD

70

70

35

30

70

70

35

25

FLA

58.5

55.3

28

25.1

55.7

53.1

26.7

20.8

WSA

67.0

64.0

32.2

26.8

67.0

64.0

32.2

25.0

OPD

80

70

35

30

70

70

35

25

FLA

65.3

62.1

30.6

26.1

59.1

56.5

28.0

21.3

WSA

71.2

68.2

33.8

28.0

71.2

68.2

33.8

25.7

OPD

90

80

40

35

80

80

40

30

FLA

71.4

67.7

33.4

28.3

65.2

62.1

30.8

23.5

WSA

77.3

73.8

36.6

30.2

77.3

73.8

36.6

27.9

OPD

90

90

45

35

90

80

40

30

FLA

86.4

82.7

41.6

36.1

73.1

71.6

35.8

28.7

WSA

93.5

89.8

45.1

38.9

86.7

83.2

41.7

32.7

OPD

110

110

50

50

100

100

50

40

FLA

93.9

89.5

45.0

39.0

80.6

78.4

39.2

31.6

WSA

101.0

96.6

48.5

41.8

94.2

90.0

45.1

35.6

OPD

125

110

60

50

110

110

50

45

FLA

101.4

96.0

49.2

39.5

84.3

80.8

40.9

31

WSA

109.4

104.0

53.3

42.5

102.7

98.6

49.9

37.8

OPD

125

125

60

50

110

110

60

45

FLA

107.5

101.6

52.0

41.7

90.4

86.4

43.7

33.2

WSA

115.5

109.6

56.1

44.7

108.8

104.2

52.7

40.0

OPD

125

125

70

50

125

125

60

45

FLA

126.1

120.2

57.6

46.1

99.7

98

46.5

35.4

WSA

136.5

130.6

62.4

49.7

120.5

115.8

56.2

42.7

OPD

175

150

80

60

150

125

70

50

FLA

133.6

127.0

61.0

49.0

107.2

104.8

49.9

38.3

WSA

144.0

137.4

65.8

52.6

128.0

122.6

59.6

45.6

OPD

175

175

80

60

150

150

70

50

FLA

145

138.4

64.0

52.6

118.4

116.2

52.4

41.0

WSA

156.8

150.2

69.2

56.6

135.1

129.8

61.5

47.9

OPD

200

175

80

70

175

175

70

60

FLA

151.6

144.4

67.0

54.6

125.0

122.2

55.4

43.0

WSA

163.4

156.2

72.2

58.6

141.7

135.8

64.5

49.9

OPD

200

200

90

70

175

175

80

60

FLA

177.4

170.2

88.4

72.6

150.8

148

76.8

61.0

WSA

192.4

185.2

96.3

78.9

175.2

168.6

86.0

67.4

OPD

250

225

125

100

225

200

110

90

FLA

192.8

184.2

95.4

78.6

166.2

162.0

83.8

67.0

WSA

207.8

199.2

103.3

84.9

190.6

182.6

93.0

73.4

OPD

250

250

125

100

225

225

110

90

Reduced reheat for 028, 035, and 042 models is 10kW.
Reduced reheat for 053, 070, and 077 models is 15kW.
Consult local representative for SCR reheat values.
Reduced reheat for 105 kW models is 20kW.
SCCR - Short Circuit Current Rating 65,000 amps rms symmetrical maximum.

Liebert® DS™

102

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 79

Electrical field connections—Upflow and downflow models, single molded case switch
disconnect with main fuses
See 4.2 - Standard Electrical Connections, 4.3 Optional Electrical Connections and 4.4 - Optional
Low-Voltage Terminal Package Connections for keys
to numbered components.

2

OVERCURRENT PROTECTION DEVICES
15

Liebert
IntelliSlot
Housing
4

A

B

C

D
Alterna
te
Location
P64

6
60Hz

CONTACTORS

P67

CONTACTORS, RELAYS, &
OVERLOAD PROTECTORS

13

E
5

1

6

50 & 60Hz

Downflow

Typical orientation of components shown. Component location
varies by option and unit size
17

18

9

16

22

CAUTION:

19
UPFLOW 3

82 83 88 89

75 76 94 95 96 97 91 92 93 80 81 11 12

Risk of broken or shorted low volt
wiring. Field installed low volt wiring
must be routed with loop as shown
to allow electric box to swing.

B

A
24

3

DOWNFLOW LOW-VOLT SECTION

23

58 59 84 85

21

7

10

8

20

37C 38C 37B 38B 37 38 24 50 51 55 56 70 71 230 72 73

C

D

49-3

49-1

SH

11

12

E

Item 12 Installation Conditions
1. Follow all local installation codes.
2. Do not run CAN cables in same conduit, raceway, or
chase as high voltage wires (120-600V).
3. Separate high volt wires from CAN wires by 12 inches.
4. For runs greater than 350ft(107m), contact Liebert factory.

103

Point of Hinged Low-Volt
Electric Box
LIEBERT DS UPFLOW LOW-VOLT SECTION

DPN000807
Pg. 2, Rev. 7

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 80

Electrical field connections—Upflow and downflow models, dual fused disconnect switches
See 4.2 - Standard Electrical Connections, 4.3 Optional Electrical Connections and 4.4 - Optional
Low-Voltage Terminal Package Connections for keys
to numbered components.

14

2

OVERCURRENT PROTECTION DEVICES
15

Liebert
IntelliSlot
Housing

4

A

B

C

D

6 60Hz
Alternate
Location

15

P64

CONTACTORS

P67

SECONDARY

PRIMARY

13

CONTACTORS, RELAYS and
OVERLOAD PROTECTORS
E
6

1
17

18

Typical orientation of components shown.
Component location varies by option and unit size
22

9

DOWNFLOW

CAUTION:

19

16

UPFLOW
82 83 88 89

3

75 76 94 95 96 97 91 92 93 80 81 11 12

Risk of broken or shorted low-voltage
wiring. Field-installed low-voltage wiring
must be routed with loop as shown
to allow electric box to swing.

B

A
23

24

3

DOWNFLOW LOW-VOLTAGE SECTION

58 59 84 85

21

7

20

10

8

37C38C37B38B 37 38 24 50 51 55 56 70 71 230 72 73

D

11

49-3

49-1

SH

C

12

Item 12 Installation Conditions

E

1. Follow all local installation codes.
2. Do not run CAN cables in same conduit, raceway or
chase as high-voltage wires (120-600V).
3. Separate high-voltage wires from CAN wires by 12" (305mm).
4. Contact Liebert factory for runs greater than 350ft. (107m).
5. All electrical loads may not be capable of being connected to both
power feeds, with automatic transfer switch.
Consult local representative for dual power configurations available.

Liebert® DS™

104

Point of Hinged Low-Voltage
Electric Box

DS UPFLOW LOW-VOLTAGE SECTION
DPN000807
Pg. 3, Rev. 8

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

4.2

STANDARD ELECTRICAL CONNECTIONS
Source: DPN000807, Rev. 8
1. Primary high voltage entrance—2.5" (64mm); 1.75" (44mm); 1.375" (35mm) diameter
concentric knockouts located in bottom of box.
2. Secondary high voltage entrance—2.5" (64mm); 1.75" (44mm); 1.375" (35mm) diameter
concentric knockouts located in top of box.
3. Primary low voltage entrance—Quantity (3) 1.375" (35mm) diameter knockouts located in
bottom of unit.
4. Secondary low voltage entrance—Quantity (3) 1. 375" (35mm) diameter knockouts located in
top of box.
5. Three phase electrical service—Terminals are on main fuse block (disregard if unit has
optional disconnect switch). Three-phase service not by Emerson.
6. Earth ground—Terminal for field-supplied earth grounding wire. Earth grounding required for
Liebert units.
7. Remote unit shutdown—Replace existing jumper between Terminals 37 & 38 with fieldsupplied normally closed switch having a minimum 75VA, 24VAC rating. Use field-supplied
Class 1 wiring.
8. Customer alarm inputs—Terminals for field-supplied, normally open contacts, having a
minimum 75VA, 24VAC rating, between Terminals 24 & 50, 51, 55 & 56. Use field-supplied
Class 1 wiring. Terminal availability varies by unit options.
9. Common alarm—On any alarm, normally open dry contact is closed across Terminals 75 & 76
for remote indication. 1A, 24VAC maximum load. Use Class 1 field-supplied wiring.
10. Heat rejection interlock—On any call for compressor operation, normally open dry contact is
closed across Terminals 70 & 71 (Circuit 1), 230 (Circuit 2) to heat rejection equipment. 1A,
24VAC maximum load. Use field-supplied Class 1 wiring. When a Liebert DS unit is paired with a
Liebert MC series condenser, remove jumper between Terminal 71 and Terminal 230. Three
wires must connect Terminals 70, 71 and 230 of the indoor unit to Terminals 70, 71 and 230 of the
Liebert MC series condenser.

105

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

4.3

OPTIONAL ELECTRICAL CONNECTIONS
Source: DPN000807, Rev. 7
11. Unit factory installed disconnect switch, Fuse Block and Main Fuses—Two types of
disconnect switches are available: Non-Locking and Locking. The Non-Locking Type consists of a
non-automatic molded case switch operational from the outside of the unit. Access to the
high-voltage electric panel compartment can be obtained with the switch in either the On or Off
position. The Locking Type is identical except access to the high-voltage electric panel
compartment can be obtained only with the switch in the Off position. Units with fused
disconnects are provided with a defeater button that allows access to the electrical panel when
power is On. The molded case switch disconnect models contain separate main fuses. Units with
fused disconnect have main fuses within the disconnect. Only fused disconnects are used on dual
disconnect options.
12. Secondary disconnect switch and earth ground
13. Three-phase electrical service—Terminals are on top of disconnect switch. Three-phase
service not by Emerson.
14. Smoke sensor alarm—Factory-wired dry contacts from smoke sensor are 91-common, 92-NO,
and 93-NC. Supervised contacts, 80 & 81, open on sensor trouble indication. This smoke sensor is
not intended to function as or replace any room smoke detection system that may be required by
local or national codes. 1A, 24VAC maximum load. Use field-supplied Class 1 wiring.
15. Reheat and humidifier lockout—Remote 24VAC required at Terminals 82 & 83 for lockout of
reheat and humidifier.
16. Condensate alarm (with condensate pump option)—On pump high water indication,
normally open dry contact is closed across Terminals 88 & 89 for remote indication. 1A, 24VAC
maximum load. Use field-supplied Class 1 wiring.
17. Remote humidifier—On any call for humidification, normally open dry contact is closed across
Terminals 11 & 12 to signal field-supplied remote humidifier. 1A, 24VAC maximum load. Use
Class 1 field-supplied wiring.
18. Auxiliary cool contact—On any call for Econ-O-coil operation, normally open dry contact is
closed across Terminals 72 & 73 on dual cool units only. 1A, 24VAC maximum load. Use
field-supplied Class 1 wiring.

4.4

OPTIONAL LOW-VOLTAGE TERMINAL PACKAGE CONNECTIONS
Source: DPN000807, Rev. 7
19. Remote unit shutdown—Two additional contact pairs available for unit shutdown (labeled as
37B & 38B, 37C and 38C). Replace jumpers with field-supplied, normally closed switch having a
minimum rating of 75VA, 24VAC. Use field-supplied Class 1 wiring.
20. Common alarm—On any alarm, two additional normally open dry contacts are closed across
Terminals 94 & 95 and 96 & 97 for remote indication. 1A, 24VAC maximum load. Use
field-supplied Class 1 wiring.
21. Main fan auxiliary switch—On closure of main fan contactor, normally open dry contact is
closed across Terminals 84 & 85 for remote indication. 1A, 24VAC maximum load. Use
field-supplied Class 1 wiring.
22. Liebert Liqui-tect™ shutdown and dry contact—On Liebert Liqui-tect activation, normally
open dry contact is closed across Terminals 58 & 59 for remote indication (Liebert Liqui-tect
sensor ordered separately). 1A, 24VAC maximum load. Use field-supplied Class 1 wiring.

Liebert® DS™

106

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

4.5

DIMENSIONS—LIEBERT DS 028-042, DOWNFLOW, WATER/GLYCOL/GLYCOOL MODELS

Figure 81

Dimensions—water/glycol/GLYCOOL, 28-42kW (8-12 ton), downflow, all compressors with
centrifugal fans

Condenser Cleanout
Access

56-7/8" Opening
(1445mm)

33"
(838mm)

Air Inlet Opening

35"
(889mm)

Secondary Condenser
TOP VIEW
Fluid Piping Entrance
Secondary Entrance
High-Volt Connection(s)

24-3/8"
(619mm)
Opening

Filters are accessible
through top of unit only.
Downflow electrical
connections can be made
from top or bottom of unit.

3/4"
(19mm)
Bezels

Required for
condenser cleanout

Secondary Entrance
Low-Volt Connections

Minimum required
for filter replacement

24"
(610mm)

86" (2184mm)

5"
(127mm)

76"
(1930mm)
34" (864mm)

2"
(51mm)
Table 80

Shaded area indicates a
recommended minimum
clearance for component
access.
DPN000894

FRONT VIEW
85" (2159mm)

Rev. 4

Weights—Water/glycol/GLYCOOL, 28-42kW (8-12 ton), downflow, all compressors

Dry Weight, Approximate, lb. (kg)
Model Size: 028-042

Model Type
Semi-Hermetic Compressor
Scroll or Digital Scroll Compressor

Water/Glycol

1930 (877)

GLYCOOL/Dual-Cool

2080 (945)

Water/Glycol

1780 (809)

GLYCOOL/Dual-Cool

1930 (877)

Source: DPN000894, Rev. 4

107

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 82

Primary connection locations—Water/glycol/GLYCOOL, 28-42kW (8-12 ton), downflow, all
compressors with centrifugal fans

NOTE: Drawing not to scale.
Tolerance on
all piping dimensions
is ± 1/2" (13mm).

A

A

All dimensions from
rear corner of unit
including panels

FRONT VIEW
X

SECTION A-A

BLOWER
OUTLET

W
8"
(203mm)

WS
WR

O

Y

16-1/16"
(408mm)
B

3-1/2"
(89mm)

35"
(889mm)

ECS
LV1
LV2
LV3

HUM
CD
E1 E2

ECR
86" (2184mm)

DPN000900
Rev. 3

FRONT OF UNIT
Table 81

Piping data—Water/glycol/GLYCOOL, 28-42kW (8-12 ton), downflow, all compressors

Point

Description

X
in. (mm)

Y
in. (mm)

Connection Size / Opening
in. (mm)

W

Water/Glycol/GLYCOOL Access

79-15/16 (2030)

9-1/16 (230)

3-1/2 x 8 (89 x 203)

WS

Water/Glycol/GLYCOOL Supply

82-15/16 (2107)

10-15/16 (278)

1-5/8" Cu Sweat

Water/Glycol/GLYCOOL Return

WR

CD

82-15/16 (2107)

14-1/16 (357)

1-5/8" Cu Sweat

Condensate Drain
(infrared humidifier or no humidifier) *

46 (1168)

29-1/2 (749)

3/4" FPT

Condensate Drain
(steam generating humidifier) *

46 (1168)

29-1/2 (749)

1-1/4" FPT

46 (1168)

29-1/2 (749)

1/2" Cu Sweat

W/ Optional Pump
HUM

Humidifier Supply Line

53-1/2 (1359)

29 (737)

1/4" Cu Sweat

ECS

Dual-Cool Supply

54-7/8 (1394)

22-9/16 (573)

1-5/8" Cu Sweat

ECR

Dual-Cool Return

49-13/16 (1265)

28-1/2 (724)

1-5/8" Cu Sweat

E1

Electrical Conn. (High Volt)

55-1/2 (1410)

31-1/4 (794)

2-1/2"

E2

Electrical Conn. (High Volt)

52-7/16 (1332)

31-1/4 (794)

2-1/2"

LV1

Electrical Conn. (Low Volt)

2-1/4 (57)

27 (686)

7/8"

LV2

Electrical Conn. (Low Volt)

2-1/4 (57)

29 (737)

7/8"

LV3

Electrical Conn. (Low Volt)

2-1/4 (57)

31 (787)

7/8"

B

Blower Outlet

21-15/16 (557)

18-1/16 (459)

18-3/4 x 16-1/16 (476 x 408)

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN000900, Rev. 3

Liebert® DS™

108

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 83

Dimensions—downflow, water/glycol/GLYCOOL systems, 28-42kW (8-12 ton), with EC fans,
front and/or rear discharge models
24" (610mm)

Secondary Refrigerant
Piping Entrance

56-7/8"
(1445mm) Opening

33"
(838mm)

Required for Condenser
cleanout on Water/Glycol or
GLYCOOL/Dual Cool

5"
(127mm)

24-3/8"
(619mm)
Opening

AIR INLET OPENING

35"
(889mm)

Secondary Entrance
High-Voltage Connection(s)

Minimum required
for filter replacement
Filters are accessible
only through top of unit.

3/4"
(19mm)
Bezels

TOP VIEW

Secondary Entrance
Low-Voltage Connections

A

34"
(864mm)

Shaded area indicates a
recommended minimum
clearance for component access.

76"
(1930mm)

33-1/2"
(851mm)
19"
(483mm) Air Outlet
Opening
2"
(51mm)

FRONT VIEW

3-1/4"
(83mm)

B

3"
(76mm)

33-3/8"
19" (848mm)
(483mm) Air Outlet
Opening
3-1/4"
(81mm)

3"
(77mm)

REAR VIEW

Customer Piping and Wiring Connections
1. For primary connection locations see standard submittals DPN000803, DPN000804 or DPN000900.
A floor stand at least 9" high is recommended if primary connections locations are to be used.
2. If no floor stand is used and unit is placed directly on the floor, then do the following:
a) Use secondary connection locations (shown on standard floor planning submittals).
b) Order a condensate pump.
c) Field pipe condensate and humidier line (if ordered) to secondary connection point in
310697
compressor section.
Pg. 1, Rev. 0
d) Or order additional SFA's to relocate connection locations

Dry Weight, lb (kg) Approximate
Compressor Type
Semi-Hermetic
Scroll / Digital
Semi-Hermetic
Scroll / Digital

Model
Dual Cool
Dual Cool
Water/Glycol
GLYCOOL/Dual Cool
Water/Glycol
GLYCOOL/Dual Cool

Dimensions
028-042

A

B

1930 (877)
1620 (736)
1930 (877)
2080 (945)
1780 (809)
1930 (877)

86" (2184mm)
73" (1854mm)

85" (2159mm)
72" (1829mm)

86" (2184mm)

85" (2159mm)

86" (2184mm)

85" (2159mm)

Source: 310697, Pg. 1, Rev. 0

109

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 84

Disassembly dimensions—Water/glycol/GLYCOOL, 28-42kW (8-12 ton), downflow, all
compressors with centrifugal fans

Filter & Electric
Box Assembly

39"
(991mm)

76"
(1930mm)
Assembled
Height

Blower & Coil
Assembly

Compressor Assembly

76"
(1930mm)

60-3/16"
(1529mm)

37"
(940mm)

33"
(838mm)

26"
(660mm)

59" (1499mm)
85" (2159mm)
Assembled Length
NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.
DPN000899
Rev. 2
Table 82

Component weights—Water/glycol/GLYCOOL, 28-42kW (8-12 ton), downflow, all compressors

Dry Weight, Approximate, Including Panels, lb (kg)
Semi-Hermetic Compressor
Component
Compressor Assembly

Scroll or Digital Scroll Compressor

Water/Glycol

GLYCOOL/Dual-Cool

Water/Glycol

GLYCOOL/Dual-Cool

950 (432)

950 (432)

800 (364)

800 (364)

Filter and Electric Box Assembly

210 (96)

210 (96)

210 (96)

210 (96)

Blower and Coil Assembly

770 (350)

920 (418)

770 (350)

920 (418)

Source: DPN000899, Rev. 2

Liebert® DS™

110

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

4.6

DIMENSIONS—LIEBERT DS 053-077, DOWNFLOW, WATER/GLYCOL/GLYCOOL MODELS

Figure 85

Dimensions—Water/glycol/GLYCOOL, 53-77kW (15-22 ton), downflow, all compressors with
centrifugal fans
Digital scroll compressors
not available on 077 models

Condenser Cleanout Access
80" (2032mm) Opening
33"
(838mm)

24-5/8"
(625mm)
Opening

Air Inlet Opening

35"
(889mm

Notes: Filters are accessible
through top of unit only.
Downflow electrical
connections can be made
from top or bottom of unit.
3/4" (20mm)
Bezels

Secondary Condenser
Fluid Piping Entrance

TOP VIEW
Secondary Entrance
Low-Volt Connections

Secondary Entrance
High-Volt Connection(s)

Required for
condenser cleanout

24"
(610mm)

109"
(2769mm)

Minimum
required
for filter
replacement
5"
(127mm)

76"
(1930mm)

2"
(51mm)

Table 83

108" (2743mm)

Shaded area indicates a
recommended minimum
clearance for component
access.

FRONT VIEW

34"
(864mm)

DPN000931
Rev. 4

Weights—Water/glycol/GLYCOOL, 53-77kW (15-22 ton), downflow, all compressors
Model Size

Compressor Type

Cooling Type

053
lb (kg)

070
lb (kg)

077 *
Standard Scroll Only
lb (kg)

Semi-Hermetic
Compressor

Water/Glycol

2650 (1205)

2700 (1228)

2750 (1250)

GLYCOOL/Dual-Cool

2830 (1287)

2880 (1310)

2930 (1332)

Scroll or Digital Scroll
Compressor

Water/Glycol

2220 (1010)

2270 (1032)

2320 (1055)

GLYCOOL/Dual-Cool

2400 (1091)

2450 (1114)

2500 (1137)

* Digital scroll compressors not available on DS 077
Source: DPN00931, Rev. 4

111

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 86

Dimensions—downflow, water/glycol, GLYCOOL systems, 53-77kW (15-22 ton), front and/or
rear discharge models
Required for Condenser
cleanout on Water/Glycol or
GLYCOOL/Dual Cool

Customer Piping and Wiring Connections

24" (610mm)
1. For primary connection locations see standard submittals DPN000928,
DPN000929 or DPN000933.
A floor stand at least 9" high is recommended if primary connections locations are to be used.
2. If no floor stand is used and unit is placed directly on the floor, then do the following:
a) Use secondary connection locations (shown on standard floor planning submittals).
b) Order a condensate pump.
c) Field pipe condensate and humidier line (if ordered) to secondary connection point in
compressor section.
d) Or order additional SFA's to relocate connection locations

Minimum required
for filter replacement
Filters are accessible
only through top of unit.
5"
(127mm)

Secondary Refrigerant
Piping Entrance
80" (2032mm)
Opening
35"
(889mm)
33"
(838mm)

25-5/8"
(619mm)
Opening

AIR INLET OPENING

Secondary Entrance
High-Voltage Connection(s)

34"
Shaded area indicates a
(864mm)
3/4"
recommended minimum
(19mm)
clearance for component access.
Secondary Entrance
Low-Voltage Connections

TOP VIEW

A

76"
(1930mm)
15-1/8"
(384mm)
29-1/4"
(743mm)
Air Outlet
Opening

B

15-1/8"
(384mm)
29-1/4"
(743mm)
Air Outlet
Opening

29-5/8"
(752mm)
Air Outlet
Opening

3-1/4"
(83mm)

FRONT VIEW

2"
(51mm)

15-1/8"
(384mm)

15-1/8"
(384mm)
29-5/8"
(752mm)
Air Outlet
Opening

3-1/4"
(83mm)

REAR VIEW

Dry Weight, lb (kg) Approximate
Compressor
Type
Semi-Hermetic
Scroll / Digital
Semi-Hermetic
Scroll / Digital

Model
Dual Cool
Dual Cool
Water/Glycol
GLYCOOL/Dual Cool
Water/Glycol
GLYCOOL/Dual Cool

Dimensions, in. (mm)

53

70

77

A

B

2530 (1150)
2100 (955)
2650 (1205)
2830 (1287)
2220 (1010)
2400 (1091)

2580 (1173)
2150 (978)
2700 (1228)
2880 (1310)
2270 (1032)
2450 (1114)

2630 (1196)
2200 (1000)
2750 (1250)
2930 (1332)
2320 (1055)
2500 (1137)

109 (2769)
98 (2489)

108 (2743)
97 (2464)

109 (2769)

108 (2743)

109 (2769)

85 (2159)

Source: 310697, Pg. 2, Rev. 0

Liebert® DS™

310697
Pg. 2, Rev. 0

3-1/8"
(79mm)

112

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 87

Primary connection locations—Water/glycol/GLYCOOL, 53-77kW (15-22 ton), all compressor
models with EC fans

NOTE: Drawing not to scale.
Tolerance on
all piping dimensions
A
is ± 1/2" (13mm).

A

FRONT VIEW
SECTION A-A

All dimensions from
rear corner of unit
including panels

X

O

3-1/2"
(89mm)
8"
(203mm)

Y

W
WS
WR

35"
(889mm)
ECS ECR

CD

B1

LV1
LV2
LV3

E1 E2 HUM
109" (2769mm)

DPN002183
Rev. 0

FRONT OF UNIT

Table 84
Point

Piping data—Water/glycol/GLYCOOL, 53-77kW (15-22 ton), downflow with EC fans
Description

X
in. (mm)

Y
in. (mm)

Connection Size / Opening
in. (mm)

W

Water/Glycol/GLYCOOL Access

103 (2616)

9 (229)

3-1/2 x 8 (89x203)

WS

Water/Glycol/GLYCOOL Supply

104-3/4 (2661)

11 (279)

2-1/8 Cu Sweat

WR

Water/Glycol/GLYCOOL Return

104-3/4 (2661)

15 (381)

2-1/8 Cu Sweat

CD

Condensate Drain
(Infrared Humidifier or No Humidifier)*

68-3/8 (1737)

31-3/8 (797)

3/4 FPT

W/ Optional Pump

68-3/8 (1737)

31-3/8 (797)

1/2 Cu Sweat

HUM

Humidifier Supply Line

76-1/2 (1943)

29 (736)

1/4 Cu Sweat

ECS**

Dual-Cool Supply

78-5/8 (1997)

22-1/4 (565)

2-1/8 Cu Sweat

ECR**

Dual-Cool Return

73-15/16 (1862)

26-9/16 (675)

2-1/8 Cu Sweat

E1

Electrical Conn. (High Volt)

78-1/2 (1994)

31-1/8 (790)

2-1/2

E2

Electrical Conn. (High Volt)

75-3/8 (1915)

31-1/8 (790)

2-1/2

LV1

Electrical Conn. (Low Volt)

2 (51)

29 (737)

7/8

LV2

Electrical Conn. (Low Volt)

2 (51)

30-7/8 (784)

7/8

LV3

Electrical Conn. (Low Volt)

2 (51)

32 (813)

7/8

B1

Blower Outlet

4-1/2 (114)

33 (838)

58-3/8x30 (1483x762)

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
** Supplied on Dual-Cooling systems only (four-pipe system)
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN002183, Rev. 0

113

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 88

Primary connection locations—Water/glycol/GLYCOOL, 53-77kW (15-22 ton), downflow, all
compressor models with centrifugal fans

NOTE: Drawing not to scale.
Tolerance on
all piping dimensions
is ± 1/2" (13mm).

A

A
FRONT VIEW

X

SECTION A-A

3-1/2"
(89mm)
8"
(203mm)

BLOWER
OUTLET

W
WS
WR

16-1/16"
(408mm)

All dimensions from
rear corner of unit
including panels

O

BLOWER
OUTLET

Y
35"
(889mm)

B1

B2

ECS
HUM ECRCD

E1 E2

LV1
LV2
LV3

109" (2769mm)

DPN000933
Rev. 4

FRONT OF UNIT

Table 85

Piping data—Water/glycol/GLYCOOL, 53-77kW (15-22 ton), downflow

Point

Description

X
in. (mm)

Y
in. (mm)

Connection Size / Opening
in. (mm)

W

Water/Glycol/GLYCOOL Access

103 (2616)

9 (229)

3-1/2 x 8 (89 x 203)

WS

Water/Glycol/GLYCOOL Supply

104-3/4 (2661)

11 (279)

2-1/8" Cu Sweat

WR

Water/Glycol/GLYCOOL Return

104-3/4 (2661)

15 (381)

2-1/8" Cu Sweat

Condensate Drain
(infrared humidifier or no humidifier)*

67-11/16 (1719)

30-1/2 (775)

3/4" FPT

CD

Condensate Drain
(steam generating humidifier)*

67-11/16 (1719)

30-1/2 (775)

1-1/4" FPT

67-11/16 (1719)

30-1/2 (775)

1/2" Cu Sweat

HUM

Humidifier Supply Line

76-1/2 (1943)

29 (736)

1/4" Cu Sweat

ECS**

Dual-Cool Supply

78-5/8 (1997)

22-1/4 (565)

2-1/8" Cu Sweat

ECR**

Dual-Cool Return

72 (1829)

29 (737)

2-1/8" Cu Sweat

E1

Electrical Conn. (High Volt)

78-1/2 (1994)

31-1/8 (790)

2-1/2"

E2

Electrical Conn. (High Volt)

75-3/8 (1915)

31-1/8 (790)

2-1/2"

LV1

Electrical Conn. (Low Volt)

1-7/8 (48)

28-1/2 (724)

7/8"

LV2

Electrical Conn. (Low Volt)

1-7/8 (48)

30-1/4 (768)

7/8"

LV3

Electrical Conn. (Low Volt)

1-7/8 (48)

32 (813)

7/8"

Blower Outlet (15 x 15)

23-1/8 (587)

18-1/16 (459)

18-3/4 x 16-1/16 (476 x 408)

Blower Outlet (15 x 11)

27-3/4 (705)

18-1/16 (459)

14-3/4 x 16-1/16 (375 x 408)

Blower Outlet (15 x 15)

50-3/8 (1280)

18-1/16 (459)

18-3/4 x 16-1/16 (476 x 408)

Blower Outlet (15 x 11)

54-3/8 (1381)

18-1/16 (459)

14-3/4 x 16-1/16 (375 x 408)

W/ Optional Pump

B1
B2

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap.
Do not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials.
The drain line must comply with all local codes.
** Supplied on Dual-Cooling systems only (four-pipe system)
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN00933, Rev. 4

Liebert® DS™

114

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 89

Disassembly dimensions—Water/glycol/GLYCOOL, 53-77kW (15-22 ton), downflow, all
compressors with centrifugal or EC fans
Digital scroll compressors
not available on 077 models

Filter & Electric Box Assembly

39"
(991mm)

Compressor Assembly

76"
(1930mm)
Assembled
Height

Blower & Coil
Assembly

76"
(1930mm)

59-7/16"
(1509mm)
37"
(940mm)

33"
(838mm)

26"
(660mm)

82"
(2083mm)
108" Assembled Length
(2743mm)

NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.

Table 86

DPN000932
Rev. 3

Component weights—Water/glycol/GLYCOOL, 53-77kW (15-22 ton), downflow, all
compressors * with centrifugal or EC fans
Dry Weight, Approximate, Including Panels, lb (kg)
Semi-Hermetic Compressor

Scroll or Digital Scroll Compressor

Water/Glycol

GLYCOOL/Dual-Cool

Water/Glycol

GLYCOOL/Dual-Cool

Compressor Assembly

1270 (578)

1270 (578)

840 (382)

840 (382)

Filter and Electric Box Assembly

250 (114)

250 (114)

250 (114)

250 (114)

Blower and Coil Assembly

1230 (560)

1410 (641)

1230 (560)

1410 (641)

Component

* Digital scroll compressors not available on DS 077
Source: DPN000932, Rev. 3

115

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

4.7

DIMENSIONS—LIEBERT DS 105, DOWNFLOW, WATER/GLYCOL/GLYCOOL-COOLED
MODELS

Figure 90

Dimensions—Water/glycol/GLYCOOL 105kW (30 ton), downflow, semi-hermetic or scroll
compressors with centrifugal or EC fans
Notes: Filters are accessible
through top of unit only.
Downflow electrical
connections can be made
from top or bottom of unit.

Condenser Cleanout Access
102-13/16"
(2611mm) Opening
33"
(838mm)
35"
(889mm)

AIR INLET OPENING

3/4"
(19mm Bezels

TOP VIEW

Secondary Entrance
Low-Volt Connections

Secondary Entrance
High-Volt Connection(s)

Secondary Condenser
Fluid Entrance

Digital scroll
compressors not
available on 105
models

24-3/8"
(619mm Opening

24"
(610mm)
132" (3353mm)

Required for
condenser
cleanout
Minimum required
for filter replacement
5"
(127mm)

76"
(1930mm)

34" (864mm)
Shaded area indicates a
recommended minimum
clearance be provided for
component access.

131" (3327mm)

FRONT VIEW

Table 87

DPN001013
Rev. 4

Weights—Water/glycol/GLYCOOL 105kW (30 ton), downflow, semi-hermetic and scroll
compressors *
Dry Weight, Approximate, lb (kg)
Forward-Curved Fans

EC Fans

Compressor
Type

Air-Cooled

Dual-Cool

Air-Cooled

Dual-Cool

Semi-Hermetic

3410 (1550)

3770 (1714)

3144 (1426)

3504 (1589)

Scroll

3290 (1495)

3650 (1659)

3024 (1372)

3384 (1535)

* Digital scroll compressors not available on DS 105
Source: DPN001013, Rev. 4

Liebert® DS™

116

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 91

Dimensions—downflow, water/glycol,GLYCOOL systems, 105kW (30 ton), front discharge
models with EC fans
Secondary Refrigerant
Piping Entrance
102-7/8" (2611mm)
Opening

33"
(838mm)

24-3/8"
(619mm)
Opening

AIR INLET OPENING

35"
(889mm)

Downflow electrical
connections can be made
from top or bottom of unit

3/4"
(19mm)

TOP VIEW
Secondary Entrance
High-Voltage Connection(s)

Required for Condenser
cleanout on Water/Glycol or
GLYCOOL/Dual Cool

Secondary Entrance
Low-Voltage Connections

132" (3353mm)
24" (610mm)

Minimum required
for filter replacement
Filters are accessible
only through top of unit.
5"
(127mm)

76"
(1930mm)
16-1/8"
(410mm)
25-5/8"
(649mm)
Air Outlet
Opening

16-1/8"
(410mm)
24-7/8"
(649mm)
Air Outlet
Opening

16-1/8"
(410mm)
28-1/4"
(718mm)
Air Outlet
Opening
30-7/8"
(783mm)

FRONT VIEW

57-1/2"
(1459mm)

131" (3326mm)

Customer Piping and Wiring Connections

3/4"
(19mm)

34"
Shaded area indicates a
(864mm)
recommended minimum
clearance for component access.

1. For primary connection locations see standard submittals DPN001014 or DPN001015.
A floor stand at least 9" high is recommended if primary connections locations are to be used.
2. If no floor stand is used and unit is placed directly on the floor, then do the following:
a) Use secondary connection locations (shown on standard floor planning submittals).
b) Order a condensate pump.
c) Field pipe condensate and humidier line (if ordered) to secondary connection point in
310697
compressor section.
Pg. 3, Rev. 0
d) Or order additional SFA's to relocate connection locations

Dry Weight, lb (kg) Approximate
Compressor Type
Semi-Hermetic
Scroll / Digital
Semi-Hermetic
Scroll / Digital

Model
Dual Cool
Dual Cool
Water/Glycol
GLYCOOL/Dual Cool
Water/Glycol
GLYCOOL/Dual Cool

105
3134 (1422)
3014 (1367)
3144 (1426)
3504 (1589)
3024 (1372)
3384 (1535)

Source: 310697, Pg. 3, Rev. 0

117

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 92

Primary connection locations—Water/glycol/GLYCOOL 105kW (30 ton), downflow,
semi-hermetic or standard scroll compressors with EC fans

Digital scroll compressors
not available on 105 models

NOTES
Drawing not to scale.
Tolerance on
all piping dimensions
is ± 1/2" (13mm).

All dimensions from

A

A Rear corner of unit

FRONT VIEW

Including panels
X

SECTION A-A

O

W
WS
WR

8"
(203mm)

Y
35"
(889mm)

BLOWER
OUTLET

3-1/2"
(89mm)
ECS ECR
CD
E1

E2

B1

LV1
LV2
LV3

HUM
132" (3353mm)

FRONT OF UNIT
Table 88

Point

DPN002153
Rev. 0

Piping data—Water/glycol/GLYCOOL 105kW (30 ton), downflow with EC fans, semi-hermetic
and standard scroll compressors ***
Description

X
in. (mm)

Y
in. (mm)

Connection Size / Opening
in. (mm)

W

Water/Glycol/GLYCOOL Access

125-15/16 (3199)

9 (229)

3-1/2 x 8 (89x203)

WS

Water/Glycol/GLYCOOL Supply

127-7/8 (3248)

10-1/16 (256)

2-1/8 Cu Sweat

WR

Water/Glycol/GLYCOOL Return

127-7/8 (3248)

13-1/4 (337)

2-1/8 Cu Sweat

CD

Condensate Drain
(Infrared Humidifier or No Humidifier)*

87-3/8 (2220)

31 (787)

3/4 FPT

W/ Optional Pump

83-13/16 (2129)

30 (762)

1/2 Cu Sweat

HUM

Humidifier Supply Line

85-5/16 (2167)

32-1/2 (825)

1/4 Cu Sweat

ECS

Dual-Cool Supply

101-7/8 (2588)

29 (737)

2-5/8 Cu Sweat

ECR

Dual-Cool Return

94-9/16 (2402)

29 (737)

2-5/8 Cu Sweat

E1

Electrical Conn. (High Volt)

98-1/8 (2492)

31 (788)

2-1/2

E2

Electrical Conn. (High Volt)

91 (2311)

31 (788)

2-1/2

LV1

Electrical Conn. (Low Volt)

2 (51)

29 (737)

7/8

LV2

Electrical Conn. (Low Volt)

2 (51)

30-7/8 (784)

7/8

LV3

Electrical Conn. (Low Volt)

2 (51)

32 (813)

7/8

B1

Blower Outlet

4-1/2 (114)

33 (838)

77-3/8 x 30 (1965x762)

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
** Supplied on Dual-Cooling systems only (four-pipe system)
*** Digital scroll compressors not available on DS 105
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN002153, Rev. 0

Liebert® DS™

118

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 93

Primary connection locations—Water/glycol/GLYCOOL 105kW (30 ton), downflow,
semi-hermetic or standard scroll compressors with centrifugal fans

Digital scroll
compressors not
available on 105 models
NOTE: Drawing not to scale.

A

A

Tolerance on
all piping dimensions
is ± 1/2" (13mm).

8"
(203mm)

W
WS
WR

FRONT VIEW

3-1/2"
(89mm)
ECS

X

SECTION A-A

15-7/8"
(403mm)
TYP

ECR

BLOWER
OUTLET

14-1/2"
(368mm)
TYP

BLOWER
OUTLET

Y
35"
(889mm)

B1

LV1
LV2
LV3

CD
HUM E1

O

BLOWER
OUTLET
B2

B3

All dimensions from
rear corner of unit
including panels

E2
132" (3353mm)

DPN001015
Rev. 3

FRONT OF UNIT

Table 89

Point
W

Piping data—Water/glycol/GLYCOOL 105kW (30 ton), downflow, semi-hermetic and standard
scroll compressors ***
Description
Water/Glycol/GLYCOOL Access

X
in. (mm)

Y
in. (mm)

Connection Size / Opening
in. (mm)

125-15/16 (3199)

9 (229)

3-1/2 x 8 (89 x 203)

WS

Water/Glycol/GLYCOOL Supply

127-7/8 (3248)

10-1/16 (256)

2-1/8" Cu Sweat

WR

Water/Glycol/GLYCOOL Return

127-7/8 (3248)

13-1/4 (337)

2-1/8" Cu Sweat

Condensate Drain
(infrared humidifier or no humidifier)*

83-13/16 (2129)

30 (762)

3/4" FPT

Condensate Drain
(steam generating humidifier)*

83-13/16 (2129)

30 (762)

1-1/4" FPT

83-13/16 (2129)

30 (762)

1/2" Cu Sweat

102-3/4 (2610)

31-3/4 (806)

1/4" Cu Sweat

CD

W/ Optional Pump
HUM

Humidifier Supply Line

ECS**

Dual-Cool Supply

101-7/8 (2588)

29 (737)

2-5/8" Cu Sweat

ECR**

Dual-Cool Return

94-9/16 (2402)

29 (737)

2-5/8" Cu Sweat

E1

Electrical Conn. (High Volt)

98-1/4 (2496)

30 (762)

2-1/2"

E2

Electrical Conn. (High Volt)

88-7/16 (2246)

30 (762)

2-1/2"

LV1

Electrical Conn. (Low Volt)

2 (51)

27-1/2 (796)

7/8"

LV2

Electrical Conn. (Low Volt)

2 (51)

30-1/4 (768)

7/8"

LV3

Electrical Conn. (Low Volt)

2 (51)

32 (813)

7/8"

B1

Blower Outlet

28-1/4 (718)

18 (457)

14-1/2 x 15-7/8 (368 x 403)

B2

Blower Outlet

52 (1321)

18 (457)

14-1/2 x 15-7/8 (368 x 403)

B3

Blower Outlet

75-11/16 (1922)

18 (457)

14-1/2 x 15-7/8 (368 x 403)

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
** Supplied on Dual-Cooling systems only (four-pipe system)
*** Digital scroll compressors not available on DS 105Piping dimensions shown are connection sizes; field piping sizes may be different
depending on distance. Refer to user manual, SL-18825.
Source: DPN001015, Rev. 3

119

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 94

Disassembly dimensions—Water/glycol/GLYCOOL 105kW (30 ton), downflow, semi-hermetic
or standard scroll compressors with centrifugal and EC fans
Digital scroll compressors
not available on 105 models

Filter & Electric Box Assembly

39"
(991mm)
41-11/16"
(1059mm)

Compressor Assembly

76" (1930mm)
Assembled
Height

Blower & Coil
Assembly

76"
(1930mm)

59-7/16"
(1510mm)
37"
(940mm)

33"
(838mm)

105"
(2667mm)

26"
(660mm)

131" Assembled Length
(3327mm)
NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.

Table 90

DPN001060
Rev. 2

Component weights—Water/glycol/GLYCOOL 105kW (30 ton), downflow, semi-hermetic and
standard scroll compressors

Dry Weight, Approximate, Including Panels, lb (kg)
Semi-Hermetic Compressor

Standard Scroll Compressor *

Water/Glycol

GLYCOOL/Dual-Cool

Water/Glycol

GLYCOOL/Dual-Cool

Compressor Assembly

1320 (600)

1320 (600)

1200 (545)

1200 (545)

Filter and Electric Box Assembly

270 (123)

270 (123)

270 (123)

270 (123)

Blower and Coil Assembly
Forward-Curved Fans

1820 (827)

2180 (991)

1820 (827)

2180 (991)

Component

* Digital scroll compressors not available on DS 105
Source: DPN001060, Rev. 2

Liebert® DS™

120

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

4.8

DIMENSIONS—LIEBERT DS 028-042, UPFLOW, WATER/GLYCOL/GLYCOOL-COOLED
MODELS

Figure 95

Dimensions—Water/glycol/GLYCOOL, 28-42kW (8-12 ton), upflow, all compressors with
centrifugal fans
Condenser Cleanout Access

33"
(838mm)
35"
(889mm)

3/4"
(19mm)
Bezels

Alternate Condenser
Fluid Piping Entrance

TOP VIEW

Minimum required
for blower replacement

Low-Volt Connection(s)

High-Volt Connection(s)
1-1/2"
(38mm)

Required for
condenser cleanout

86" (2184mm)
24"
(610mm)

76"
(1930mm)

34"
Shaded area indicates a
(864mm)
recommended minimum
clearance for component
access.
Note: Front air return unit shown. For
rear return unit, in addition to front service
area shown, also include 25" (635mm) on
one side of unit for access to rear return
filter box. See DPN001196.
DPN001164

85" (2159mm)

2"
(51mm)

FRONT VIEW

Rev. 2

Table 91

Weights—Water/glycol/GLYCOOL, 28-42kW (8-12 ton), upflow, all compressors

Dry weight, including panels, lb. (kg)
Semi-Hermetic Compressor

Scroll or Digital Scroll Compressor

Water/Glycol

GLYCOOL/Dual-Cool

Water/Glycol

GLYCOOL/Dual-Cool

1980 (898)

2130 (966)

1830 (830)

1980 (898)

Forward-Curved Fans
Source: DPN001164, Rev. 2

121

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 96

Primary connection locations—Water/glycol/GLYCOOL, 28-42kW (8-12 ton), upflow, all
compressors with centrifugal fans

NOTES:
1. Drawing not to scale.
2. Tolerance on all piping dimensions is ± 1/2" (13mm).

All dimensions from
rear corner of unit
including panels
X

3. Field routed alternatives for water/glycol connections.
4. See submittal page DPN001120 for blower outlet and deck
dimensional data.

O

Blower
Outlet

W1, W2

8"
35"
(203mm)
(889mm)

Y

2-7/8"
(73mm)
3-1/2"
(89mm)

86" (2184mm)

TOP VIEW OF UNIT

6"
(152mm)

Front of Unit

17-3/16"
(437mm)

3-7/8"
(98mm)

14-1/4"
(362mm)
15-7/8"
(403mm)

CGD*

FRONT SECTION VIEW OF UNIT
(Left Front Panel Not Shown)

LEFT SIDE SECTION VIEW OF UNIT

Table 92

DPN001179
Rev. 3

Piping data—Water/glycol/GLYCOOL, 28-42kW (8-12 ton), upflow, all compressors

Point

Description

X
in. (mm)

Y
in. (mm)

Connection Size / Opening
in. (mm)

W1

3

Water/Glycol/GLYCOOL Access (Bottom)

79-15/16 (2030)

9 (229) 3-1/2

3-1/2 x 8 (89 x 203)

W2

3

Water/Glycol/GLYCOOL Access (Top)

79-15/16 (2030)

9 (229)

3-1/2 x 8 (89 x 203)

W3

3

Water/Glycol/GLYCOOL Access (Side)

—

—

6 x 17-3/16 (152 x 437)

WS

3

Water/Glycol/GLYCOOL Supply

—

—

1-5/8" CU Sweat

3

Water/Glycol/GLYCOOL Return

—

—

1-5/8" CU Sweat

WR

CGD *

Condensate Gravity Drain

—

—

3/4" FPT

CPD

Condensate Pump Discharge (Opt)

56-1/4 (1429)

11-1/8 (282)

1/2" CU Sweat

HUM

Humidifier Supply Line

56-1/4 (1429)

9-1/8 (232)

1/4" CU Sweat

ECS **

Dual-Cool Supply

56 (1423)

7-5/16 (186)

1-5/8" CU Sweat

ECR **

Dual-Cool Return

56 (1423)

4-1/2 (114)

1-5/8" CU Sweat

E1

Electrical Conn. (High Volt)

55-3/8 (1407)

30-7/8 (784)

2-1/2"

E2

Electrical Conn. (High Volt)

49-7/8 (1267)

30-7/8 (784)

2-1/2"

LV1

Electrical Conn. (Low Volt)

19-1/2 (495)

29-1/16 (738)

7/8"

LV2

Electrical Conn. (Low Volt)

19-1/2 (495)

30-1/2 (775)

7/8"

LV3

Electrical Conn. (Low Volt)

19-1/2 (495)

31-15/16 (811)

7/8"

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do
not trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply
with all local codes.
** Supplied on dual-cool systems only (four-pipe system).
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN001179, Rev. 3

Liebert® DS™

122

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 97

Disassembly dimensions—Water/glycol/GLYCOOL, 28-42kW (8-12 ton), upflow, all
compressors with centrifugal fans

Blower & Electric
Box Assembly

31-1/4"
(794mm)

Compressor Assembly

76" (1930mm)
Assembled
Height

Filter & Coil
Assembly
76"
(1930mm)

45-13/16"
(1163mm)

26"
(660mm)

33"
(838mm)

59" (1499mm)
85" (2159mm)
Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.

Table 93

DPN001173
Rev. 1

Component weights—Water/glycol/GLYCOOL, 28-42kW (8-12 ton), upflow, all compressors
Dry Weight, Approximate, Including Panels, lb (kg)
Semi-Hermetic Compressor

Scroll/Digital Scroll Compressor

Water/Glycol

GLYCOOL/Dual-Cool

Water/Glycol

GLYCOOL/Dual-Cool

Compressor Assembly

950 (432)

950 (432)

800 (364)

800 (364)

Blower and Electric Box Assembly

510 (231)

510 (231)

510 (231)

510 (231)

Filter and Coil Assembly

520 (236)

670 (304)

520 (236)

670 (304)

Component

Source: DPN001173, Rev. 1

123

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 98

Blower outlet location—28-42kW (8-12 ton), upflow with centrifugal fans

73" (1854mm) or 86" (2184mm) Ref
E

Blower Outlet *

C

A

35"
(889mm)
Ref

B

Blower Outlet Location - Top View

Front of Unit

* Duct flange not provided

Top of Unit
Blower Deck
1-1/2"
(38mm)

D

76"
(1930mm)
Ref

Front or Rear Throw Air Supply
Table 94

DPN001120
Rev. 3

Blower outlet and deck dimensions—28-42kW (8-12 ton), upflow
Dimensional data, in. (mm)

Model

28-42kW
(8-12ton)

Blower
15 x 15
15 x 11

Supply

A

B

C

D

E

Front Throw

15-7/8 (404)

18-5/8 (472)

2-1/8 (54)

25-5/8 (651)

25 (635)

Rear Throw

15-7/8 (404)

18-5/8 (472)

11-5/8 (295)

25-5/8 (651)

25 (635)

Front Throw

15-7/8 (404)

14-1/2 (368)

2-1/8 (54)

25-5/8 (651)

25 (635)

Rear Throw

15-7/8 (404)

14-1/2 (368)

11-5/8 (295)

25-5/8 (651)

25 (635)

Source: DPN001120, Rev. 3

Liebert® DS™

124

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

4.9

DIMENSIONS—LIEBERT DS 053-077, UPFLOW, WATER/GLYCOL/GLYCOOL-COOLED
MODELS

Figure 99

Dimensions—Water/glycol/GLYCOOL, 53-77kw (15-22 ton), upflow, all compressors with
centrifugal fans
Condenser Cleanout Access

Digital scroll compressors
not available on 077 models.

33"
(838mm)
Required for
3/4"
condenser cleanout
(19mm) Bezels
Minimum required
for blower replacement

35"
(889mm)
Alternate Condenser
Fluid Piping Entrance

TOP VIEW

High-Volt Connection(s)

Low-Volt
Connection(s)

109" (2769mm)

1-1/2"
(38mm)

24"
(610mm)

76"
(1930mm)

34"
(864mm)
Shaded area indicates a
recommended minimum
clearance for component access.
2"
(51mm)

108" (2743mm)

FRONT VIEW

NOTE: Front air return unit shown. For rear return unit, in addition to front service
area shown, also include 25" (635mm) on one side of unit for access to rear
return filter box. See DPN001196.

Table 95

DPN001167
Rev. 2

Weights—Water/glycol/GLYCOOL, 53-77kw (15-22 ton), upflow, all compressors

Dry Weight, Approximate, lb (kg)
Semi-Hermetic Compressor
053
Fan Type
Forward-Curved Fans

Scroll or Digital Scroll

070, 077

053, 070, 077 *

Water/ Glycol

GLYCOOL/
Dual-Cool

Water/Glycol

GLYCOOL/
Dual-Cool

Water/Glycol

GLYCOOL/
Dual-Cool

2650 (1205)

2830 (1287)

2800 (1270)

2980 (1352)

2370 (1075)

2550 (1157)

* Digital scroll compressors not available on DS 077
Source: DPN001167, Rev. 2

125

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 100 Primary connection locations—Water/glycol/GLYCOOL, 53-77kw (15-22 ton), upflow with
centrifugal fans
All dimensions from
rear corner of unit
including panels

NOTES:
1. Drawing not to scale.
2. Tolerance on all piping dimensions
8"
is ± 1/2" (13mm).
(203mm)
3. Field routed alternatives for water/glycol
35"
connections.
(889mm) 2-7/8"
(73mm)
4. See submittal page DPN001191 for
3-1/2"
blower outlet and deck dimensional data.

Blower
Outlet

Blower
Outlet

(89mm)

109" (2769mm)
Front of Unit

TOP VIEW OF UNIT

6"
(152mm)
17-3/16"
(437mm)
3-7/8"
(98mm)

14-1/4"
(362mm)

FRONT SECTION VIEW OF UNIT

15-7/8"
(403mm)

(Left Front Panel Not Shown)

LEFT SIDE SECTION VIEW OF UNIT

Table 96

DPN001214
Rev. 1

Piping data—Water/glycol/GLYCOOL, 53-77kw (15-22 ton), upflow
X, in. (mm)

Y, in. (mm)

Connection Size / Opening

Water/Glycol/GLYCOOL
Access (Bottom)

102-15/16 (2615)

9 (229)

3-1/2 x 8 (89 x 203)

3

Water/Glycol/GLYCOOL
Access (Top)

102-15/16 (2615)

9 (229)

3-1/2 x 8 (89 x 203)

W3

3

Water/Glycol/GLYCOOL
Access (Side)

—

—

6 x 17-3/16 (152 x 437)

WS

3

Water/Glycol/GLYCOOL Supply

—

—

2-1/8" Cu Sweat

WR

3

Point

Description

W1

3

W2

Water/Glycol/GLYCOOL Return

—

—

2-1/8" Cu Sweat

CGD*

Condensate Gravity Drain

—

—

3/4" FPT

CPD

Condensate Pump Discharge (Opt)

79-5/16 (2015)

11-7/8 (302)

1/2" Cu Sweat

HUM

Humidifier Supply Line

79-5/16 (2015)

9-7/8 (251)

1/4" Cu Sweat

ECS

Dual-Cool Supply

78-5/8 (1998)

7-7/8 (200)

2-1/8" Cu Sweat

ECR

Dual-Cool Return

78-5/8 (1998)

4-5/8 (117)

2-1/8" Cu Sweat

E1

Electrical Conn. (High Volt)

75-3/8 (1915)

30 (762)

2-1/2"

E2

Electrical Conn. (High Volt)

69-7/8 (1775)

30 (762)

2-1/2"

LV1

Electrical Conn. (Low Volt)

19-1/2 (495)

29-1/16 (738)

7/8"

LV2

Electrical Conn. (Low Volt)

19-1/2 (495)

30-1/2 (775)

7/8"

LV3

Electrical Conn. (Low Volt)

19-1/2 (495)

31-15/16 (811)

7/8"

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory installed condensate trap. Do not
trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply with all
local codes.
** Supplied on dual-cool systems only.
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN001214, Rev. 1

Liebert® DS™

126

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 101 Disassembly dimensional data—Water/glycol/GLYCOOL, 53-77kw (15-22 ton), upflow, all
compressors with centrifugal fans

Digital scroll compressors
not available on 077 models.

Blower & Electric
Box Assembly

31-1/4"
(794mm)

Compressor Assembly

76"
(1930mm)
Assembled
Height

Filter & Coil
Assembly
76"
(1930mm)

45-13/16"
(1163mm)

33"
(838mm)

26"
(660mm)

82" (2083mm)

108" (2743mm) Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.
Table 97

DPN001211
Rev. 1

Component weights—Water/glycol/GLYCOOL, 53-77kw (15-22 ton), upflow, all compressors

Dry Weight, Approximate, Including Panels, lb (kg)
Semi-Hermetic Compressor
Component
Compressor Assembly
Blower and Electric Box Assembly
Forward-Curved Fans
Filter and Coil Assembly

Scroll or Digital Scroll Compressor *

Water/Glycol

GLYCOOL/Dual-cool

Water/Glycol

GLYCOOL/Dual-Cool

1270 (578)

1270 (578)

840 (382)

840 (382)

770 (349)

770 (349)

770 (349)

770 (349)

760 (345)

940 (426)

760 (345)

940 (426)

* Digital scroll compressors not available on DS 077
Source: DPN001211, Rev. 1

127

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 102 Blower outlet and deck dimensions—53-77kW (15-22 ton), upflow, with centrifugal fans

98" (2449mm) or 109" (2769mm)
F
E
Blower Outlets *

C

A

A

35"
(889mm)
Ref

B

B

Blower Outlet Location - Top View

Front of Unit

* Duct flanges not provided.

Top of Unit
Blower Deck
D

1-1/2"
(38mm)

76"
(1930mm)
Ref.

Front or Rear Air Throw Supply
Table 98

DPN001191
Rev. 6

Blower outlet and deck dimensions—53-77kW (15-22 ton), upflow, forward-curved fans
Dimensional Data, in. (mm)

Models

Blower
15 x 15

53-77kW
(15-22 ton)
15 x 11

Supply

A

B

C

D

E

F

Front Throw

15-7/8 (404)

18-5/8 (472)

2-1/8 (54)

25-5/8 (651)

27-3/4 (705)

55-1/2 (1410)

Rear Throw

15-7/8 (404)

18-5/8 (472)

11-5/8 (295)

25-5/8 (651)

27-3/4 (705)

55-1/2 (1410)

Front Throw

15-7/8 (404)

14-11/16 (373)

2-1/8 (54)

25-5/8 (651)

31-3/8 (797)

58-7/16 (1484)

Rear Throw

15-7/8 (404)

14-11/16 (373)

11-5/8 (295)

25-5/8 (651)

31-3/8 (797)

58-7/16 (1484)

Source: DPN001191, Rev. 6

Liebert® DS™

128

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

4.10

DIMENSIONS—LIEBERT DS 105, UPFLOW, WATER/GLYCOL/GLYCOOL MODELS

Figure 103 Dimensions—Water/glycol/GLYCOOL,105kW (30 ton), upflow, semi-hermetic and standard
scroll compressors with centrifugal fans
Alternate Refrigerant
Piping Entrance

Digital scroll compressors
not available on 105 models.

33"
(838mm)
35"
(889mm)
Alternate Condenser
Fluid Piping Entrance

TOP VIEW

High-Volt Connection(s)
1-1/2"
(38mm)

3/4"
(19mm)
Bezels

Required for
condenser cleanout

Minimum required
for blower replacement

Low-Volt Connection(s)
132" (3353mm)

24"
(610mm)

76"
(1930mm)

2"
(51mm)

Shaded area indicates a
recommended minimum
clearance for component
access.

131" (3327mm)

FRONT VIEW

Note: Front air return unit shown. For rear return unit, in addition to front
service area shown, also include 25" (635mm) on one side of unit
for access to rear return filter box. See DPN001196.

Table 99

34"
(864mm)

DPN001169
Rev. 1

Weights—Water/glycol/GLYCOOL,105kW (30 ton), upflow, semi-hermetic and standard scroll
compressors *

Dry Weight, Approximate, lb (kg)
Semi- Hermetic Compressor
Fan Type
Forward-Curved Fans

Standard Scroll Compressor

Water/Glycol

GLYCOOL/Dual-Cool

Water/Glycol

GLYCOOL/Dual-Cool

3370 (1529)

3700 (1678)

3250 (1474)

3580 (1624)

* Digital scroll compressors not available on DS 105
Source: DPN001169, Rev. 1

129

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 104 Primary connection locations—Water/glycol/GLYCOOL,105kW (30 ton), upflow with centrifugal
fans
All dimensions from
rear corner of unit
including panels

35"
(889mm)

Blower
Outlet

8"
(203mm)

Blower
Outlet

Blower
Outlet

2-7/8"
(73mm)
3-1/2"
(89mm)

LV1 LV3

NOTES:
1. Drawing not to scale.
2. Tolerance on all piping dimensions
is ± 1/2" (13mm).
3. Field routed alternatives for water/glycol
connections.
4. See submittal page DPN001192 for
blower outlet and deck dimensional data.

LV2

LV4

132"
(3353mm)

Front Of Unit

TOP VIEW OF UNIT

6"
(152mm)
W3
WS
WR

17-3/16"
(437mm)

CGD*

3-7/8"
(98mm)

14-1/4"
(362mm)

CGD*

FRONT SECTION VIEW OF UNIT
(Left Front Panel Not Shown)

15-7/8"
(403mm)

DPN001258
Rev. 0

LEFT SIDE SECTION VIEW OF UNIT
Table 100 Piping data—Water/glycol/GLYCOOL,105kW (30 ton), upflow
Point

Description

X

Y

Connection Size/ Opening

W1

3

Water/Glycol/GLYCOOL Access (Bottom) 126-1/8" (3204mm)

9" (229mm)

3-1/2" x 8" (89mm x 203mm)

W2

3

Water/Glycol/GLYCOOL Access (Top)

9" (229mm)

3-1/2" x 8" (89mm x 203mm)

W3

3

Water/Glycol/GLYCOOL Access (Side)

—

—

6" x 17-3/16" (152mm x 437mm)

Water/Glycol/GLYCOOL Supply

—

—

2-1/8" Cu Sweat

Water/Glycol/GLYCOOL Return

—

—

2-1/8" Cu Sweat

CGD*

Condensate Gravity Drain

—

—

3/4" FPT

WS

3

WR

3

126-1/8" (3204mm)

CPD

Condensate Pump Discharge (Opt)

102-3/8" (2600mm) 13-5/8" (346mm)

1/2" Cu Sweat

HUM

Humidifier Supply Line

101-1/8" (2569mm) 13-1/8" (333mm)

1/4" Cu Sweat

ECS

Dual-Cool Supply

101-1/8" (2569mm) 10-1/4" (260mm)

2-5/8" Cu Sweat

ECR

Dual-Cool Return

101-1/8" (2569mm)

5-1/4" (133mm)

2-5/8" Cu Sweat

E1

Electrical Conn. (High Volt)

98-1/2" (2502mm)

30" (762mm)

2-1/2"

E2

Electrical Conn. (High Volt)

93" (2362mm)

30" (762mm)

2-1/2"

LV1

Electrical Conn. (Low Volt)

41-1/8" (1045mm)

30-3/8" (772mm)

7/8"

LV2

Electrical Conn. (Low Volt)

38-7/8" (987mm)

30-3/8" (772mm)

7/8"

LV3

Electrical Conn. (Low Volt)

35-1/8" (892mm)

30-3/8" (772mm)

7/8"

LV4

Electrical Conn. (Low Volt)

31-5/8" (803mm)

30-3/8" (772mm)

7/8"

* Field pitch condensate drain line a minimum of 1/8" (3.2 mm) per foot (305 mm). All units contain a factory-installed condensate trap. Do not
trap external to the unit. Drain line may contain boiling water. Select appropriate drain system materials. The drain line must comply with all
local codes.
Piping dimensions shown are connection sizes; field piping sizes may be different depending on distance. Refer to user manual, SL-18825.
Source: DPN001258, Rev. 0

Liebert® DS™

130

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 105 Disassembly dimensions—Water/glycol/GLYCOOL,105kW (30 ton), upflow, all compressors
with centrifugal fans

Digital scroll compressors
not available on 105 models.

Blower & Electric
Box Assembly

31-1/4"
(794mm)

Compressor
Assembly
76"
(1930mm)
Assembled
Height

Filter & Coil
Assembly
76"
(1930mm)

45-13/16"
(1164mm)

33"
(838mm)

26"
(660mm)

105" (2667mm)
131" (3327mm
Assembled Length

NOTES: Drawing views are simplified with panels removed to show overall dimensions.
See disassembly and handling instructions in installation manual.

DPN001256
Rev. 1

Table 101 Component weights—Water/glycol/GLYCOOL,105kW (30 ton), upflow, all compressors
Dry Weight, Approximate, Including Panels, lb (kg)
Semi-Hermetic Compressor

Standard Scroll Compressor *

Water/Glycol

GLYCOOL/Dual-Cool

Water/Glycol

GLYCOOL/Dual-Cool

Compressor Assembly

1320 (599)

1320 (599)

1200 (544)

1200 (544)

Blower and Electric Box Assembly
Forward-Curved Fans

1080 (490)

1080 (490)

1080 (490)

1080 (490)

Filter and Coil Assembly

970 (440)

1300 (590)

970 (440)

1300 (590)

Component

* Digital scroll compressors not available on DS 105
Source: DPN001256, Rev. 1

131

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 106 Blower outlet and deck dimensions—105kW (30 ton), upflow with centrifugal fans

132" (3353mm)
G
Blower Outlets *

F
E

A

A

A
35"
(889mm)
Ref

B

B

B

C

BLOWER OUTLET LOCATION - TOP VIEW

Front of Unit

* Duct flanges not provided

TOP OF UNIT
Blower Deck
1-1/2"
(38mm)

76"
(1930mm)
Ref

DPN001192
Rev. 1

Front or Rear Throw Air Supply

Table 102 Blower outlet and deck dimensions—105kW (30 ton), upflow, forward-curved fans
Dimensional Data, in. (mm)
Blower
15 x 11

SUPPLY

A

B

Front Throw 15-7/8 (404) 14-11/16 (373)

C
2-1/8 (54)

D

E

F

G

25-5/8 (651) 30-3/4 (781) 54-1/2 (1384) 78-1/8 (1984)

Rear Throw 15-7/8 (404) 14-11/16 (373) 11-5/8 (295) 25-5/8 (651) 30-3/4 (781) 54-1/2 (1384) 78-1/8 (1984)

Source: DPN001192, Rev. 1

Liebert® DS™

132

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

4.11

HEAT REJECTION—DRYCOOLERS AND PUMPS

4.11.1 Drycooler Selection—Prop Fan Drycoolers
Table 103 Liebert DS drycooler selection
Drycooler Type
Outdoor Drycooler
Outdoor Quiet-Line Drycooler
Liebert DS
Model
95°F (35°C) 100°F (38°C) 105°F (41°C) 95°F (35°C) 100°F (38°C) 105°F (41°C)
028

D-174

D-225-16

D-310-16

D-173-16

D-205-16

D-356-32

035

D-174

D-225-16

D-350-16

D-178-16

D-205-16

D-356-32

042

D-225-16

D-310

D-419

D-205

D-347-32

D-453-32

053

D-260

D-350

D-491-32

DD-248

D-347-32

D-453-32

070

D-310

D-419

D-620-32

D-347-32

D-453-32

D-453-32

077

D-350

D-466

D-650-40

D-347-32

D-453-32

N/A

105

D-466

D-620-32

D-880-52

D-453

N/A

N/A

4.11.2 Dimensions—Prop Fan Drycoolers
Figure 107 Dimensions—2-fan fin/tube drycooler models

43-9/16"
(1106mm)
91-1/2"
(2324mm)

37-7/8"
(962mm)

18"
(457mm)

84"
(2134mm)

Emerson recommends a
clearance of 36" (915mm)
on each side for proper
operation and component
access.

43-3/16"
(1097mm)

133

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 108 Dimensions—3- and 4-fan fin/tube drycooler models
43-9/16"
(1106mm)
131-1/2"
(3340mm)
37-7/8"
(962mm)

43-9/16"
(1106mm)
171-1/2"
(4356mm)

18"
(457mm)

124"
(3150mm)

70"
(1778mm)

37-7/8"
(962mm)

Eyebolts
for Lifting

43-3/16"
(1097mm)

18"
(457mm)

Note:
Overall height to the top of fan guard
43-1/8" (1095mm)

164"
(4166mm)
Emerson recommends a
clearance of 36" (915mm)
on each side for proper
operation and component
access.

43-3/16"
(1097mm)

Figure 109 Dimensions—6- and 8-fan fin/tube drycooler models

131-1/2"
(3340mm)

87-1/8"
(2213mm)
87-1/8"
(2213mm)

171-1/2"
(4356mm)

37-7/8"
(962mm)

37-7/8"
(962mm)

59"
(1499mm)

18"
(457mm)

86-3/4"
(2203mm)

124"
(3150mm)

Overalll height to the top
of the fan guard is 43-1/8” (1095mm).

Liebert® DS™

18"
(457mm)
70" (1778mm)
1-1/2" (38mm)
diameter hole for
rigging (typ.4)
86-3/4"
(2203mm)

134

164"
(4166mm)

Emerson recommends a
clearance of 36" (915mm) on
each side for proper
operation and component

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Table 104 Drycooler physical data
Internal
Volume,
gal. (L)

Net Weight
lb. (kg)

-033

1.2 (4.6)

390 (177)

-069

2.4 (9.2)

410 (186)

3.7 (13.9)

430 (195)

-109

4.9 (18.6)

450 (204)

-112

5.8 (22.0)

470 (213)

-139

4.8 (18.2)

565 (256)

6.9 (26.2)

605 (274)

Model #

-092

-174
-197

Number
of Fans

1

2

9 (34)

645 (293)

-225

11.1 (42.1)

685 (310)

-260

10.0 (37.8)

826 (375)

13.1 (50.0)

886 (402)

-310

3

-350

19.4 (73.3)

946 (429)

-352

13.1 (49.6)

1040 (471)

17.4 (65.9)

1120 (508)

22.0 (83.3)

1150 (522)

-491

26.3 (99.6)

1200 (544)

-620

27.0 (102.2)

1940 (880)

33.0 (124.9)

2000 (907.2)

40.0 (151.4)

2060 (934.4)

-419
-466

-650

4

6

-700
-790
-880

8

-940

35.0 (132.5)

2550 (1157)

44.0 (166.5)

2730 (1238.3)

52.0 (196.8)

2910 (1320)

All drycooler fan motors are 3/4 hp.

Table 105 Liebert Quiet-Line™ drycooler physical data

Model #

Number
of Fans

-040
-057

1

-060
-080
-111

2

-121
-158
-173

3

-178
-205
-248
-347
-356
-453
-498

4
6
8

Internal
Volume,
gal. (L)

Net Weight
lb. (kg)

2.4 (9.2)

410 (186)

3.7 (13.9)

430 (195)

4.9 (18.6)

450 (204)

4.8 (18.2)

565 (256)

6.9 (26.2)

605 (274)

9.0 (34.0)

645 (293)

10.0 (37.9)

825 (374)

13.1 (50.0)

885 (401)

19.4 (73.3)

860 (390)

13.1 (50.0)

1070 (485)

17.4 (65.9)

1160 (526)

27.0 (102.2)

1770 (803)

39.3 (148.8)

1890 (857)

35.0 (132.5)

2320 (1052)

52.6 (199.1)

2680 (1216)

135

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

4.11.3 Electrical Data—Prop Fan Drycoolers
Table 106 60Hz electrical values—Prop fan drycoolers without pump controls, standard models
Drycooler Model

Voltage

33, 69, 92,
109, 112
1 Fan

139, 174,197
225
2 Fans

260, 310,
350
3 Fans

352, 419, 466,
491
4 Fans

620, 650,
700
6 Fan

790, 880,
940
8 Fans

FLA

4.8

—

—

—

—

—

WSA

6.0

—

—

—

—

—

OPD

15

—

—

—

—

—

Phase
1

208/230
3

460

575

3

3

FLA

3.5

7.0

10.5

14.0

21.0

28.0

WSA

4.4

7.9

11.4

14.9

21.9

28.9

OPD

15

15

15

20

25

35

FLA

1.7

3.4

3.4

6.8

10.2

13.6

WSA

2.1

3.8

3.8

7.2

10.6

14.0

OPD

15

15

15

15

15

20

FLA

1.4

2.8

4.2

5.6

8.4

11.2

WSA

1.8

3.2

4.6

6.0

8.8

11.6

OPD

15

15

15

15

15

15

Table 107 60Hz electrical values—Prop fan drycoolers without pump controls, Liebert Quiet-Line models
Drycooler Model
Voltage
208/230

460

575

Liebert® DS™

Phase

40, 57, 60
1 Fan

80, 111, 121
2 Fans

158, 173, 178
3 Fans

205, 248
4 Fans

347, 356
6 Fans

453, 498
8 Fans

3

FLA

1.8

3.6

10.5

5.4

10.8

14.4

3

WSA

2.3

4.1

11.4

5.9

11.3

14.9

3

OPD

15

15

15

15

15

20

3

FLA

0.9

1.8

5.1

2.7

5.4

7.2

3

WSA

1.1

2.0

5.5

2.9

5.6

7.4

3

OPD

15

15

15

15

15

15

3

FLA

0.7

1.4

4.2

2.1

4.2

5.6

3

WSA

0.9

1.6

4.6

2.3

4.4

5.8

3

OPD

15

15

15

15

15

15

136

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Table 108 60Hz electrical values—Standard prop fan drycoolers with integral pump controls
Number of Fans
Model #
Pump HP

2

3

4

6

8

139, 174, 197, 225

260, 310, 350

352, 419, 466, 491

620, 650, 700

790, 880, 940

FLA

WSA

OPD

FLA

WSA

OPD

FLA

WSA

OPD

FLA

WSA

OPD

FLA

WSA

OPD

208/230/3/60
0.75

10.5

11.4

15

14.0

14.9

20

17.5

18.4

25

24.5

25.4

30

31.5

32.4

40

1.5

13.6

15.3

20

17.1

18.8

25

20.6

22.3

25

27.6

29.3

35

34.6

36.3

40

2.0

14.5

16.4

20

18.0

19.9

25

21.5

23.4

30

28.5

30.4

35

35.5

37.4

45

3.0

17.6

20.3

30

21.1

23.8

30

24.6

27.3

35

31.6

34.3

40

38.6

41.3

50

5.0

23.7

27.9

40

27.2

31.4

45

30.7

34.9

50

37.7

41.9

50

44.7

48.9

60

7.5

31.2

37.3

60

34.7

40.8

60

38.2

44.3

60

45.2

51.3

70

52.2

58.3

80

10.0

37.8

45.5

70

41.3

49.0

70

44.8

52.5

80

51.8

59.5

90

58.8

66.5

90

15

53.2

64.8

110

56.7

68.3

110

60.2

71.8

110

67.2

78.8

110

74.2

85.8

125

0.75

5.0

5.4

15

6.7

7.1

15

8.4

8.8

15

11.8

12.2

15

15.2

15.6

20

1.5

6.4

7.2

15

8.1

8.9

15

9.8

10.6

15

13.2

14.0

20

16.6

17.4

20

2.0

6.8

7.7

15

8.5

9.4

15

10.2

11.1

15

13.6

14.5

20

17.0

17.9

20

460/3/60

3.0

8.2

9.4

15

9.9

11.1

15

11.6

12.8

15

15.0

16.2

20

18.4

19.6

25

5.0

11.0

12.9

20

12.7

14.6

20

14.4

16.3

20

17.8

19.7

25

21.2

23.1

30

7.5

14.4

17.2

25

16.1

18.9

25

17.8

20.6

30

21.2

24.0

30

24.6

27.4

35

10.0

17.4

20.9

30

19.1

22.6

35

20.8

24.3

35

24.2

27.7

40

27.6

31.1

45

15

24.4

29.7

50

26.1

31.4

50

27.8

33.1

50

31.2

36.5

50

34.6

39.9

60

0.75

4.1

4.5

15

5.5

5.9

15

6.9

7.3

15

9.7

10.1

15

12.5

12.9

15

1.5

5.2

5.8

15

6.6

7.2

15

8.0

8.6

15

10.8

11.4

15

13.6

14.2

20

2.0

5.5

6.2

15

6.9

7.6

15

8.3

9.0

15

11.1

11.8

15

13.9

14.6

20

3.0

6.7

7.7

15

8.1

9.1

15

9.5

10.5

15

12.3

13.3

15

15.1

16.1

20

5.0

8.9

10.4

15

10.3

11.8

15

11.7

13.2

15

14.5

16.0

20

17.3

18.8

20

7.5

11.8

14.1

20

13.2

15.5

20

14.6

16.9

25

17.4

19.7

25

20.2

22.5

30

575/3/60

10.0

13.8

16.6

25

15.2

18.0

25

16.6

19.4

30

19.4

22.2

30

22.2

25.0

35

15

19.8

24.1

40

21.2

25.5

40

22.6

26.9

40

25.4

29.7

45

28.2

32.5

45

137

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

4.11.4 Piping—Prop Fan Drycoolers
Figure 110 Typical piping arrangement, multiple prop fan drycoolers and multiple indoor units
Expansion Tank
Gal. (L)

FS
Drycooler No. 1 Model
GPM (L/s)
P:

Ft (kPA)

See Note 3

Cooling Unit #
Model
GPM (L/s)
P Ft (kPa):
Cooling Unit #
Model
GPM (L/s)
P Ft (kPa):

Total
GPM
(L/s):
Pipe
Diam.:
In. (mm)
P: Ft.
(kPa)
Cooling Unit #
Model
GPM (L/s)
P Ft (kPa):

Cooling Unit #
Model
GPM (L/s)
P Ft (kPa):

Drycooler No. 2 Model
GPM (L/s)
P:

Ft (kPA)

LEGEND
Gate Valve
Check Valve
Butterfly Valve

Cooling Unit #
Model
GPM (L/s)
P Ft (kPa):
Cooling Unit #
Model
GPM (L/s)
P Ft (kPa):

Relief Valve
Union
Ball Or Flow Control Valve
FS

Flow Switch

Cooling Unit #
Model
GPM (L/s)
P Ft (kPa):

P:Pressure Drop

Strainer Filter
Notes:
1. Pressure and temperature gauges (or ports for same) are recommended to monitor
component pressure drops and performance.
2. Flow measuring devices, drain and balancing valves to be supplied by others and
located as required.
3. See product literature for installation guidelines and clearance dimensions.
4. Drawing shows dual pump package. Alternate pump packages with more pumps may be
considered, consult supplier

Liebert® DS™

138

Cooling Unit #
Model
GPM (L/s)
P Ft (kPa):
Cooling Unit #
Model
GPM (L/s)
P Ft (kPa):
Cooling Unit #
Model
GPM (L/s)
P Ft (kPa):
Cooling Unit #
Model
GPM (L/s)
P Ft (kPa):
Cooling Unit #
Model
GPM (L/s)
P Ft (kPa):

DPN000991
Rev. 0

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Table 109 Standard drycooler piping connection sizes and internal volume
Drycooler

Model #

No. of Internal
Coil Circuits

No. of
Fans

Internal Volume,
gal. (L)

No. of
Inlets/Outlets

Inlet & Outlet Connection Size
OD Copper, in.

ID Sweat, in.

033

4*

1.2 (4.6)

1/1

1-3/8

—

069

4, 8*

2.4 (9.2)

1/1

1-3/8

—

092

6, 12*, 16

3.7 (13.9)

1/1

1-5/8

—

109

8

1/1

1-3/8

—

109

16*

1/1

2-1/8

—

112

8

112

16*, 26

139

8, 16*

174

8, 16*, 24

197

8, 16*, 32

225

16, 26*

260

16, 24*

310

16, 32*

350

16, 32*

350

48

352

16, 24*

419

16, 32*

466

26

466

40*

491

16

491

32, 48*

620

32, 64*

650

40, 52*

650

80

700

32, 64*

700

96

790

32, 64*

880

52

880

80*

940

32, 64

940

96*

1

4.9 (18.6)

1/1

1-3/8

—

1/1

2-1/8

—

4.8 (18.2)

1/1

2-1/8

—

6.9 (26.2)

1/1

2-1/8

—

9 (34)

1/1

2-1/8

—

11.1 (42.1)

1/1

2-1/8

—

10.0 (37.8)

1/1

2-1/8

—

13.1 (50.0)

1/1

2-1/8

—

5.8 (22.0)

2

3

1/1

2-1/8

—

1/1

2-5/8

—

13.1 (49.6)

1/1

2-1/8

—

17.4 (65.9)

1/1

2-1/8

—

1/1

2-1/8

—

1/1

25/8

—

1/1

2-1/8

—

1/1

2-5/8

—

19.4 (73.3)

4

22.0 (83.3)
26.3 (99.6)
27.0 (102.2)

6

33.0 (124.9)
40.0 (151.4)
35.0 (132.5)

8

44.0 (166.5)
52.0 (196.8)

2/2

—

2-1/8

2/2

—

2-1/8

4/4

—

2-1/8

2/2

—

2-1/8

4/4

—

2-1/8

2/2

—

2-1/8

2/2

—

2-1/8

4/4

—

2-1/8

2/2

—

2-1/8

4/4

—

2-1/8

* = Standard Circuiting

139

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Table 110 Liebert Quiet-Line drycooler piping connection sizes and internal volume
Drycooler

Model #

No. of Internal
Coil Circuits

040

4, 8*

057

12*

057

16

060

8

060

16*

080

8, 16*

111

16*, 24

121

No. of
Fans

Internal Volume
gal. (L)
2.4 (9.2)

1

3.7 (13.9)
4.9 (18.6)

Inlet & Outlet Connection Size
OD Copper, in.

ID Sweat, in.

1/1

1-3/8

—

1/1

1-5/8

—

1/1

2-1/8

—

1/1

1-3/8

—

1/1

2-1/8

—

4.8 (18.2)

1/1

2-1/8

—

6.9 (26.2)

1/1

2-1/8

—

16*, 32

9.0 (34.0)

1/1

2-1/8

—

158

16, 24*

10.0 (37.9)

1/1

2-1/8

—

173

16, 32*

13.1 (50.0)

1/1

2-1/8

—

178

16, 32*

1/1

2-1/8

—

178

48

1/1

2-5/8

—

205

16, 24*

13.1 (50.0)

1/1

2-1/8

—

248

16, 32*

17.4 (65.9)

1/1

2-1/8

—

347

32, 64*

27.0 (102.2)

2/2

—

2-1/8

356

32, 64*

2/2

—

2-1/8

356

96

4/4

—

2-1/8

453

32, 64*

498

32, 64

498

96*

2

3

19.4 (73.3)
4

6

39.3 (148.8)
35.0 (132.5)

8

52.6 (199.1)

* = Standard circuiting

Liebert® DS™

No. of
Inlets/Outlets

140

2/2

—

2-1/8

2/2

—

2-1/8

4/4

—

2-1/8

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 111 Piping schematic—Water/glycol semi-hermetic compressor models
Optional Dual Pump System Shown

LIEBERT
HEAT REJECTION

CUSTOMER
HEAT REJECTION

** EXPANSION
TANK

* Check Valves
(on Dual Pump
Systems only)

DRYCOOLER
(Glycol)

COOLING TOWER
AND PUMP
SYSTEM
BY OTHERS

GLYCOL
PUMPS

* Pressure
Port

Aquastat
Sensing
Bulbs

* Hose
Bib

* Shutoff Valve

* Gate Valves

*** Air Vents
(typical)

* Pressure Port

Flow Switch
Supplied with Dual
Pump Systems

* Shutoff Valve

SUPPLY

RETURN

* Flow-Regulating
Valve

SUPPLY

RETURN

LIEBERT DS UNIT
(and associated piping)

RETURN

LIQUID

* Shutoff Valve

* Shutoff Valve
Sensing Bulb

Cylinder
Unloader(s)

Service
Valve

SUPPLY

Optional
3-Way
Regulating
Valve

EVAPORATOR
COIL

SUCTION

* Hose
Bib

Muffler

COMPRESSOR
Check
Valve

Two-Way
Regulating
Valve

Service External
Valve Equalizer

DISCHARGE
PARADENSER®
CONDENSER

Expansion Solenoid Sight
Valve
Glass
Valve

Bypass Valve

Filter Drier

NOTES: Two refrigeration circuits provided.
Single refrigeration circuit shown for clarity.

Sensor

TO SECOND
REFRIGERATION
CIRCUIT

Schematic representation shown.
Do not use for specific connection locations.
FACTORY PIPING
FIELD PIPING
OPTIONAL FACTORY PIPING
Service / Schrader (Access) Connection No Valve Core
Service / Schrader (Access) Connection With Valve Core

141

* Components are not supplied by
Emerson but are recommended for
proper circuit operation and
maintenance
** Field-installed at highest point in
system on return line to pumps
*** Locate at tops of all risers and
any intermediate system high points

DPN000895
Rev. 3

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 112 Piping schematic—Water/glycol scroll compressor models
** EXPANSION
TANK

LIEBERT
HEAT REJECTION

CUSTOMER
HEAT REJECTION

DRYCOOLER
(Glycol)

COOLING TOWER
AND PUMP
SYSTEM
BY OTHERS

GLYCOL
PUMPS
* Check Valves
(on Dual Pump
Systems only)
* Gate Valves

* Pressure
Port

Aquastat
Sensing
Bulbs

* Hose
Bib

Optional Dual Pump System Shown

* Shutoff Valve

*** Air Vents
(typical)

* Pressure Port

Flow Switch
Supplied with Dual
Pump Systems
* Flow-Regulating
Valve

* Shutoff Valve
RETURN

SUPPLY

SUPPLY

RETURN

LIEBERT DS UNIT
(and associated piping)

RETURN

SUPPLY

* Shutoff Valve

* Shutoff Valve

LIQUID
Sensing Bulb

Optional
3-Way
Regulating
Valve

EVAPORATOR
COIL

* Hose
Bib

SUCTION

Service
Service
Valve
Valve External
COMPRESSOR
Check
Equalizer
Valve

* Hose
Bib

Two-Way
Regulating
Valve

DISCHARGE

Bypass Valve

PARADENSER®
CONDENSER

Expansion Solenoid Sight Filter Drier
Valve
Glass
Valve
NOTES: Two refrigeration circuits provided.
Single refrigeration circuit shown for clarity.
Schematic representation shown.
This schematic does not imply or define elevations and
component location, unless specifically noted.

Sensor

TO SECOND
REFRIGERATION
CIRCUIT

FACTORY PIPING
FIELD PIPING
OPTIONAL FACTORY PIPING
Service / Schrader (Access) Connection No Valve Core
Service / Schrader (Access) Connection With Valve Core

Liebert® DS™

142

* Components are not supplied by
Emerson but are recommended for
proper circuit operation and maintenance
** Field-installed at highest point in system
on return line to pumps
DPN000896
*** Locate at tops of all risers and
Rev. 3
any intermediate system high points

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

4.11.5 Pump Packages & Expansion Tank
Figure 113 Single pump package piping connections and dimension

17-1/4"
(438.2mm)

SINGLE PACKAGE 0.75 - 7.5 HP

2
1
3

19"
(482.6mm)

2-7/8"
(72.9mm)

15-7/8"
(403.2mm)

1-3/4"
(44.4mm)

6-3/8"
(161.9mm)
8-3/4"
(222.3mm)

12-1/4"
(311.1mm)

30"
(762mm)

17"
(431.8mm)

PUMP PACKAGE MOUNTING ANGLES
(Angles are inside, bottom
of pump package. View used for
mounting reference.)

1

3" (76.2mm) diameter pump suction
connection knockouts

2

3" (76.2mm) diameter pump discharge
connection knockouts

4

3 7/8" (22.2mm) diameter electrical knockouts
4

4 1/2" (12.7mm) diameter holes for mounting

3/4"
(19mm)
C

DPN000278
Rev. 0

A

B

Table 111

Mounting hole dimensions, in. (mm)
A

B

C

Single (0.75 - 7.5hp)

15-1/4 (387.4)

2-1/2 (63.5)

22-1/2 (571.5)

Dual (0.75 - 5hp)

30-1/4 (768.4)

2-1/2 (63.5)

22-1/2 (571.5)

Dual (7.5hp)

39-5/16 (998.5)

1-3/4 (44.5)

26-7/8 (682.6)

Pump Package

Source: DPN000278, Rev. 0

143

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 114 Dual pump package piping connections and dimensions
DUAL PACKAGE 0.75 - 5 HP
2

See Figure 113 and Table 111 for
mounting angles and dimensions

32-1/4"
(819.2mm)

1
2

3

1
3

15-7/8"
(403.2mm)

4-1/8"
(104.8mm)

6-3/8"
(161.9mm) "

2-7/8"
(73mm)

8-3/4" (222.2mm)

19"
(482.6mm)

1-3/4"
(44.4mm)

12-1/4"
(311.1mm)
30"
(762mm)

23-3/4"
(603.2mm)
27-1/4"
(692.1mm)
32"
(812.8mm)

1

3" (76.2mm) diameter pump suction
connection knockouts

2

3" (76.2mm) diameter pump discharge
connection knockouts

3

7/8" (22.2mm) diameter electrical knockouts

5 5" (127mm) diameter pump discharge
connection hole

6 5" (127mm) diameter pump suction
connection hole
32-3/8"
(822.3mm)

DUAL PACKAGE 7.5 HP

3
5

41-1/4"
(1047.8mm)

6
5
6

19-15/16
(506.4mm)

11-7/8
(301.6mm)
15-7/8
(403.2mm)
33-3/16"
(843mm)

16-3/8"
(415.9mm)

29-3/16"
(741.4mm)

6-1/2"
(165.1mm)

41"
(1041.4mm)

Liebert® DS™

144

DPN000328
Rev. 0

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 115 Pump package expansion tank

30-1/2"
(774.7mm)
Ø 9"
(228.6mm)

1/2" F.P.T.
Fitting

2-3/4"
(69.9mm)

2-1/2"
(63.5mm)

1"
(25.4mm)
1-1/2"
(38.1mm)

6-13/16"
(173mm)

1/2" F.P.T.
Fitting

17-1/4"
(438.2mm)

7"
(177.8mm)
4"
(101.6mm)

1"
(25.4mm)

Ø 1/2" (12.7mm)
8 Holes

1-1/2"
(38.1mm)

6-1/8"
(155.6mm)

8.8 gal. (33.3 L)
Expansion Tank

3"
(76.2mm)

DPN000329
Rev. 0

Expansion Tank (P/N 1C16717P1)
This tank, included in a standard pump package, has an internal volume of 8.8 gal. (33 l) and a
maximum pressure of 100 psi (690 kPa).
This tank is sized for a typical “open” system with a fluid volume of less than 75 gal. (280l). When
used in a “closed” system, volumes of up to 140 gal. (910l) can be accommodated. The use of a safety
relief valve, field-supplied, is recommended for systems “closed” to atmospheric venting. Other piping
accessories for filling, venting, or adjusting the fluid in the system, are recommended, but not
included.
Table 112 Glycol pump data
Connections

Electric @ 60Hz

Pump
HP

NPT Suction
Connection

Female
Discharge
Connection

ph

208
FLA

230
FLA

460
FLA

575
FLA

3/4

1-1/4"

3/4"

1

7.6

6.9

N/A

N/A

3/4

1-1/4"

3/4"

3

3.5

3.2

1.6

1.3

1-1/2

1-1/4"

3/4"

3

6.6

6.0

3.0

2.4

2

1-1/4"

3/4"

3

7.5

6.8

3.4

2.7

3

1-1/2"

1"

3

10.6

9.6

4.8

3.9

5

1-1/2"

1-1/4"

3

16.7

15.2

7.6

6.1

7-1/2

3"

3"

3

24.2

22.0

11.0

9.0

• To Calculate Total Pump and Drycooler Full Load Amps (FLA):
Total FLA = Pump FLA + Drycooler FLA
• To Calculate Total Pump and Drycooler Wire Size Amps (WSA):
Total WSA = Largest Motor FLA x 1.25 + Sum of other Motor FLA values
• To Calculate Total Pump and Drycooler Maximum Overcurrent Protective Device (OPD):
Total OPD = Largest Motor FLA x 2.25 + Sum of other Motor FLA values
Select standard fuse size (15A, 20A, 25A, 30A, etc.)

145

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 116 Pump curve, 60 Hz
180

Curve
A
B
C
D
E
F

Total Head, Feet/Water

160
140

F
120

E

G

D
100

80

60

HP
3/4 (1-ph)
3/4 (3-ph)
1.5
2
3
5
7.5

G

C
B
A

40
20
0

10

20

30

40

50

60

70

80

120

160

200

250

300

400

Flow Rate, GPM

Table 113 60Hz electrical values—Quiet-Line drycoolers with integral pump controls
Number of Fans
3
Model #
Pump H.P.
208/230/3/60
0.75
1.5
2.0
3.0
5.0
7.5 *
10.0 *
15 *
460/3/60
0.75
1.5
2.0
3.0
5.0
7.5 *
10.0 *
15 *
575/3/60
0.75
1.5
2.0
3.0
5.0
7.5 *
10.0 *
15 *

4

158, 173, 178

6

205, 248

8

347, 356

453, 498

FLA

WSA

OPD

FLA

WSA

OPD

FLA

WSA

OPD

FLA

WSA

OPD

8.9
12.0
12.9
16.0
22.1
29.6
36.2
51.6

9.8
13.7
14.8
18.7
26.3
35.7
43.9
63.2

15.0
20.0
20.0
25.0
40.0
50.0
70.0
100.0

10.7
13.8
14.7
17.8
23.9
31.4
38.0
53.4

11.6
15.5
16.6
20.5
28.1
37.5
45.7
65.0

15.0
20.0
20.0
30.0
40.0
60.0
70.0
110.0

14.3
17.4
18.3
21.4
27.5
35.0
41.6
57.0

15.2
19.1
20.2
24.1
31.7
41.1
49.3
68.6

20.0
25.0
25.0
30.0
45.0
60.0
80.0
110.0

17.9
21.0
21.9
25.0
31.1
38.6
45.2
60.6

18.8
22.7
23.8
27.7
35.3
44.7
52.9
72.2

25.0
25.0
30.0
35.0
50.0
60.0
80.0
110.0

4.3
5.7
6.1
7.5
10.3
13.7
16.7
23.7

4.7
6.5
7.0
8.7
12.2
16.5
20.2
29.0

15.0
15.0
15.0
15.0
15.0
25.0
30.0
45.0

5.2
6.6
7.0
8.4
11.2
14.6
17.6
24.6

5.6
7.4
7.9
9.6
13.1
17.4
21.1
29.9

15.0
15.0
15.0
15.0
20.0
25.0
35.0
50.0

7.0
8.4
8.8
10.2
13.0
16.4
19.4
26.4

7.4
9.2
9.7
11.4
14.9
19.2
22.9
31.7

15.0
15.0
15.0
15.0
20.0
30.0
35.0
50.0

8.8
10.2
10.6
12.0
14.8
18.2
21.2
28.2

9.2
11.0
11.5
13.2
16.7
21.0
24.7
33.5

15.0
15.0
15.0
15.0
20.0
30.0
35.0
50.0

3.4
4.5
4.8
6.0
8.2
11.1
13.1
19.1

3.7
5.1
5.5
7.0
9.7
13.4
15.9
23.4

15.0
15.0
15.0
15.0
15.0
20.0
25.0
40.0

4.1
5.2
5.5
6.7
8.9
11.8
13.8
19.8

4.4
5.8
6.2
7.7
10.4
14.1
16.6
24.1

15.0
15.0
15.0
15.0
15.0
20.0
25.0
40.0

5.5
6.6
6.9
8.1
10.3
13.2
15.2
21.2

5.8
7.2
7.6
9.1
11.8
15.5
18.0
25.5

15.0
15.0
15.0
15.0
15.0
20.0
25.0
40.0

6.9
8.0
8.3
9.5
11.7
14.6
16.6
22.6

7.2
8.6
9.0
10.5
13.2
16.9
19.4
26.9

15.0
15.0
15.0
15.0
15.0
25.0
30.0
40.0

Values are calculated per UL 1995. Pump FLA values used are based on NEC tables for motor horsepower. OPD values may be adjusted
higher than calculations to compensate for maximum anticipated application temperatures.
* May require electrical component(s) with higher capacity in the drycooler. Consult factory representatives for assistance before ordering.

Liebert® DS™

146

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

4.11.6 Drycooler Selection—Indoor Piggyback Drycoolers
Table 114 Liebert indoor piggyback drycooler/DS matchup data
Drycooler Selections
Drycooler
Type

Liebert DS Model

Ambient
Temp. °F (°C)

028

035

042

053

070

077

95 (35)

PD-133/150

PD-150

PD-223

PD-290

PD-333

PD-333

100 (38)

PD-223

PD-223

PD-333

N/A

N/A

N/A

105 (41)

PD-333

PD-333

PD-333

N/A

N/A

N/A

Piggyback
Drycooler

Table 115 Indoor piggyback airflow and static pressure data
HP/RPM
Model

Ext. Static Pressure - in. (Pa)

No.
of Fans

CFM (m /hr)

0.25 (62.3)

0.50 (125)

0.75 (187)

1.0 (249)

2

6600 (11,200

2/575

3/650

3/725

3/800

2

6900 (11,730

2/605

3/680

3/750

3/820

2
2
2

12,500 (21,250
12,300 (20,910
16,500 (28,050

7.5/760
7.5/780
10/640

7.5/810
7.5/830
10/695

7.5/870
7.5/890
10/740

7.5/920
7.5/940
15/790

PD-102
PD-133
PD-150
PD-223
PD-290
PD-333

3

Values are without filter box. External Static Pressure = filter pressure drop + other static drops.
Source: DPN000695, Rev. 0

4.11.7 Weights and Dimensions—Indoor Piggyback Drycoolers
Figure 117 Dimensions—Indoor piggyback drycoolers
E
H

K

1-1/8"
(29mm)

J

R

K

Overall

Optional Fan
Discharge

S

D

B
D

ns
imensio

Overa

ll Dim

ensio

ns

Disconnect
Switch

H
J
R

35-1/8"
(892mm)

72"
(1829mm)

Fan Discharge
Shaded areas indicate
a recommended
clearance of 34" (864mm)
for component access.

5"
(127mm)

1"
(25.4mm)

G
Condenser Coil Inlet
and Duct Connection

10"
(254mm)
Drain Outlet
Opening

C

C
Unit Base

UNIT DIMENSIONS

15-7/16"
(392mm)
Floor Level
A

A
Unit Base

F
Rear of
Cabinet

Note: A 1" (25.4mm) flange is provided
on all units for duct connection
to coil duct opening and fan air
discharge opening.

DPN000710
Rev. 1

FLOOR CUTOUT DIMENSIONS

147

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Table 116 Dimensions—Indoor piggyback drycoolers, in (mm)
A

B

C

D

E

F

G

H

J

K

R

S

72
(1829)
72
(1829)
72
(1829)
97
(2464)
97
(2464)
97
(2464)

74
(1880)
74
(1880)
74
(1880)
99
(2515)
99
(2515)
99
(2515)

31
(787)
31
(787)
31
(787)
33
(838)
33
(838)
33
(838)

32
(813)
32
(813)
32
(813)
34
(864)
34
(864)
34
(864)

1-1/8
(29)
1-1/8
(29)
1-1/8
(29)
3-1/8
(79)
3-1/8
(79)
3-1/8
(79)

33
(838)
33
(838)
33
(838)
46-1/2
(1181)
46-1/2
(1181)
46-1/2
(1181)

60
(1524)
60
(1524)
60
(1524)
85
(2159)
85
(2159)
85
(2159)

8-5/8
(219)
8-5/8
(219)
8-5/8
(219)
23-5/16
(592)
23-5/16
(592)
16-5/16
(421)

50-3/16
(1275)
50-3/16
(1275)
50-3/16
(1275)
50-3/16
(1275)
50-3/16
(1275)
63-7/8
(1622)

16-1/16
(408)
16-1/16
(408)
16-1/16
(408)
16-1/16
(408)
16-1/16
(408)
19-1/8
(486)

13-3/16
(335)
13-3/16
(335)
13-3/16
(335)
23-1/2
(597)
23-1/2
(597)
16-13/16
(427)

14-11/16
(373)
14-11/16
(373)
14-11/16
(373)
14-11/16
(373)
14-11/16
(373)
11-5/8
(295)

Model
PD-102
PD-133
PD-150
PD-223
PD-290
PD-333

1. A 1" (25.4mm) flange is provided on all units for duct connection to coil duct opening and fan air discharge opening.
2. Source: DPN000710, Rev. 1

4.11.8 Electrical Data—Piggyback Drycoolers
Table 117 Electrical data, piggyback drycoolers, 60Hz, 3 Ph
Drycooler
No Pumps

Model

PD-102
PD-133

PD-150

PD-223

PD-290

PD-333

Drycooler
Standard Pump Package

Total Unit

Pump Only

Drycooler - Optional
Pump Package
Pump
Only

Total Unit

Total Unit

Voltage

Blower
Motor HP

FLA

WSA

OPD

hp

FLA

FLA

WSA

OPD

hp

FLA

WSA

OPD

208

3

10.6

13.3

20

1.5

6.6

17.2

19.9

30

2

18.1

20.8

30

230

3

9.6

12.0

20

1.5

6.0

15.6

18

25

2

16.4

18.8

25

460

3

4.8

6.0

15

1.5

3.0

7.8

9

15

2

8.2

9.4

15

575

3

3.9

4.9

15

1.5

2.4

6.3

7.3

15

2

6.6

7.6

15

208

3

10.6

13.3

20

2

7.5

18.1

20.8

30

3

21.2

23.9

30

230

3

9.6

12.0

20

2

6.8

16.4

18.8

25

3

19.2

21.6

30

460

3

4.8

6.0

15

2

3.4

8.2

9.4

15

3

9.6

10.8

15

575

3

3.9

4.9

15

2

2.7

6.6

7.6

15

3

7.8

8.8

15

208

7.5

24.2

30.3

50

3

10.6

34.8

40.9

60

5

40.9

47

70

230

7.5

22.0

27.5

45

3

9.6

31.6

37.1

50

5

37.2

42.7

60

460

7.5

11.0

13.8

20

3

4.8

15.8

18.6

25

5

18.6

21.4

30

575

7.5

9.0

11.3

20

3

3.9

12.9

15.2

20

5

15.1

17.4

25

208

7.5

24.2

30.3

50

5

10.6

40.9

47

60

3

34.8

40.9

60

230

7.5

22.0

27.5

45

5

9.6

37.2

42.7

30

3

31.6

37.1

50

460

7.5

11.0

13.8

20

5

4.8

18.6

21.4

25

3

15.8

18.6

25

575

7.5

9.0

11.3

20

5

3.9

15.1

17.4

20

3

12.9

15.2

20

208

10

30.8

38.5

60

5

10.6

47.5

55.2

80

3

41.4

49.1

70

230

10

28.0

35.0

60

5

9.6

43.2

50.2

70

3

37.6

44.6

70

460

10

14.0

17.5

30

5

4.8

21.6

25.1

35

3

18.8

22.3

35

575

10

11.0

13.8

20

5

3.9

17.1

19.9

30

3

14.9

17.7

25

ph = phase; FLA = Full Load Amps; WSA = Wire Size Amp; OPD = Maximum Overcurrent Protection Device

Liebert® DS™

148

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 118 Piping—Indoor piggyback drycooler models

See Note 1

A
E

C

B

See Note 2

3" (76mm)

D
See Note 1

1" (25mm)
3" (76mm)
C See Note 2

1. Multiple knockouts of 1-3/8" (35mm), 1-3/4" (45mm)
and 2-1/2" (64mm) for Main Power Supply (Typ).
2. Cover plate for access of glycol piping inlet and outlet.
3. Piggyback drycooler connection sizes for supply and
return glycol lines are the same as room unit supply and return lines.
Note applies to PD-133.

12-5/8"
(321mm)

9-11/16"
(246mm)

2-1/2" (64mm)
7-7/8"
(200mm)

5-1/2" (140mm)
See Note 1

3"
(76mm)

Drain Outlet
Location
1-1/4" (32mm) F.P.T.

6"
3"
(152mm)
1-1/2" (76mm)
(38mm)

See Note 2

8"
(203mm)

DPN000711
Rev. 0

Table 118 Dimensions—Indoor piggyback drycoolers

Table 119 Pipe connection sizes, ODS

Model #

Model # Glycol Supply Glycol Ret.

A

B

C

D

E

Drain

PD-102 27-1/4 (692) 1-1/2 (38) 6 (152) 9-1/8 (232) 28-3/4 (730)

PD-102

1-5/8 (41)

1-1/4 (32)

1-1/4 (32)

PD-133 27-1/4 (692) 1-1/2 (38) 6 (152) 9-1/8 (232) 28-3/4 (730)

PD-133

See Note 3

See Note 3

1-1/4 (32)

PD-150 27-1/4 (692) 1-1/2 (38) 6 (152) 9-1/8 (232) 28-3/4 (730)

PD-150

2-1/8 (54)

1-1/4 (32)

1-1/4 (32)

PD-223 27-1/4 (692) 1-1/2 (38) 6 (152) 9-1/8 (232) 28-3/4 (730)

PD-223

2-1/8 (54)

1-1/4 (32)

1-1/4 (32)

PD-290 27-1/4 (692) 1-1/2 (38) 6 (152) 9-1/8 (232) 28-3/4 (730)

PD-290

2-1/8 (54)

1-1/4 (32)

1-1/4 (32)

PD-333 29-1/2 (749

PD-333

2-1/8 (54)

1-1/4 (32)

1-1/4 (32)

6 (152)

6 (152)

—

—

149

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

4.11.9 System Piping—Piggyback Drycoolers
Figure 119 Piping schematic—Liebert DS glycol-cooled models with centrifugal piggyback drycoolers
Drycooler
Electric
Box

Drycooler
Coil

Expansion Tank

Glycol
Pumps

Pressure
Tap

Unions
Valve
Actuator

Hose
Bib *
Air Vents *
At Top Of
Risers

Aquastat
Sensing
Bulb
Pressure
Tap

B

Check Valves On Dual
Pump Systems Only
Pressure
Tap
Evaporator
Coil
Ball Valves

Fluid
Return
To Pump

AB
A

3-Way Chilled
Glycol Valve

Fluid
Supply
From
Pump

Flow Switch Supplied
With Dual Pump Systems
Installed in Field
Flow Regulating Valve *
Solenoid
Pressure
Valve
Tap

Pressure
Tap

Optional
Dual Pump
System Shown

Unions

Expansion
Valve

External
Equalizer

Sight
Glass
Filter
Dryer

Sensing
Bulb
Cylinder
Unloader
(Optional)

Service
Valves
Glycol
Coolant
Circuit
One Required
Per Unit

Fluid
Fluid Supply
Return To Unit
From
Unit
Shutoff

Liquid
Return

Muffler

Compressor

Shutoff
Valve
Relief
Valve
Bypass
Valve

Condenser
Optional
3-Way Glycol
Regulating Valve
Bypass
Valve

Valves *

To Second
Refrigeration
Circuit

2-Way Glycol
Regulating
Valve

SINGLE REFRIGERATION CIRCUIT SHOWN

2-Way Glycol
Regulating
Valve

Hose *
Bibs
* Components are not supplied by Liebert
but are recommended for proper
circuit operation and maintenance

Liebert® DS™

150

FACTORY PIPING
OPTIONAL PIPING
FIELD PIPING

DPN000706
REV 0

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 120 Piping schematic—Liebert DS GLYCOOL models with centrifugal piggyback drycoolers
Drycooler
Electric
Box

Drycooler
Coil

Expansion Tank
Pressure
Tap

Valve
Actuator

A
B

Flow Switch
Supplied w/
Dual Pump
Systems
Pressure
Tap

Pressure
Tap

Optional
Dual Pump
System Shown

Aquastat
Ball Valves
Sensing
Bulb
Pressure
Tap
Fluid
Return
To Pump
AB
Fluid
3-Way Chilled Supply
Glycol Valve From
Pump

Glycol
Pumps

Unions

Check Valves On Dual
Pump Systems Only
Pressure
Tap
Econ-O-Coil
Evaporator
Coil

Valve
Actuator

Expansion
Valve

Econ-O-Cycle
Comparator

Solenoid
Valve
3-Way
Chilled
Glycol
Valve

Sight
Glass

External
Equalizer

Filter
Dryer

Cylinder
Unloader
(Optional)

Muffler

Econ-O-Coil
Circuit

Glycol
Coolant
Circuit
One Required
Per Unit

Service
Valves

Liquid
Return

One Supplied
Per Unit

Sensing
Bulb

Compressor r

Shutoff
Valve
Relief
Valve
Condenser

3-Way Glycol
Regulating
Valve
Fluid
Fluid Supply
Return To Unit
From
Unit
Shutoff
Valves *

To Second
Refrigeration
Circuit

3-Way Glycol
Regulating
Valve

SINGLE REFRIGERATION CIRCUIT SHOWN
FACTORY PIPING
OPTIONAL PIPING
FIELD PIPING
* Components are not supplied by Liebert
but are recommended for proper
circuit operation and maintenance

DPN000707
REV 0

Hose *
Bibs

151

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

4.12

ANCILLARY ITEMS—WATER-COOLED SYSTEMS

Figure 121 Floor stand dimensions—28-42kW (8-12 ton), downflow

A+1-1/2"
(38mm) (with feet)
A
47-15/16"
(1218mm)

B

4-1/2"
(114mm)

33"
(838mm)

16-3/4"
(425mm)

34-1/2"
(876mm)
(with feet)

Supply air
discharge opening

Supply air
discharge
opening

1"
(25mm) TYP.

Gussets supplied on floor stands
12" (305 mm) tall and greater
Optional turning vane
shown as front air discharge.

Turning vane air outlet
Optional turning vane can be field-installed
in supply air discharge opening for front or
rear air discharge.
NOTE: Right side of paneled unit is flush with right side of floorstand. All other paneled sides overhang
floor stand 1" (25mm).
* Leveling feet are provided with ± 1-1/2" (38mm) adjustment from nominal height C.

7/8"
(23mm)

3"
(76mm)

Table 120 Floor stand and floor planning dimensions—28-42kW (8-12 ton), downflow
Dimensional Data, in. (mm)

Height, in. (mm)

Model

A

B

Air-Cooled Semi-Hermetic Models and
All Water/Glycol/GLYCOOL Models

85
(2159)

26
(660)

Air-Cooled Scroll Models and
Air-Cooled Digital Scroll Models

72
(1829)

13
(330)

Source: DPN000820, Rev. 3

Liebert® DS™

152

C*

D turning vane

9 (229)

4 (111)

12 (305)

7 (187)

15 (381)

10 (264)

18 (457)

13 (340)

21 (533)

16 (416)

24 (610)

19 (492)

DPN000820
Rev. 3

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 122 Floor stand dimensions—53-77kW (15-22 ton), downflow

A+1-1/2"
(38mm) (with feet)
A
69-3/4" (1772mm)

B

34-1/2"
(876mm)
(with feet)

16-3/4"
(425mm)

Supply air
discharge
opening

33"
(838mm)

1"
(25mm) TYP.
Gussets supplied on floor stands
12" (305 mm) tall and greater

Supply air
discharge opening

7/8"
(23mm)

Optional turning vane
shown as front air discharge.

3"
(76mm)
Turning vane air outlet
Optional turning vane can be field-installed
in supply air discharge opening for front or
rear air discharge.
NOTE: Right side of paneled unit is flush with right side of floor stand. All other paneled sides overhang
floor stand 1" (25mm). * Leveling feet are provided with ± 1-1/2" (38mm) adjustment from nominal height C.

DPN000930
Rev. 2

Table 121 Floor stand and floor planning dimensions—53-77kW (15-22 ton), downflow
Dimensions, in. (mm)

Height, in. (mm)

Model

A

B

Air-Cooled Semi-Hermetic Models and
All Water/Glycol/GLYCOOL Models

108
(2743)

26
(660)

Air-Cooled Scroll Models and
Air-Cooled Digital Scroll Models

97
(2464)

15
(381)

C*

D - Turning Vane

9 (229)

4 (111)

12 (305)

7 (187)

15 (381)

10 (264)

18 (457)

13 (340)

21 (533)

16 (416)

24 (610)

19 (492)

Source: DPN000930, Rev. 2

153

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 123 Floor stand dimensions—105kW (30 ton), downflow

132-1/2"
(3366mm) (with feet)

26"
(660mm)

131"
(3327mm)
91-3/4"
(2330mm)

4-1/2"
(114mm)

34-1/2"
(876mm)
(with feet)
33"
(838mm)

16-3/4"
(425mm)

1"
(25mm) TYP.

Supply air
discharge
opening

Supply air
discharge opening

Gussets supplied on floor stands
12" (305 mm) tall and greater
7/8"
(23mm)
Optional turning vane
shown as front air discharge.

3"
(76mm)

Turning vane air outlet
Optional turning vane can be field-installed
in supply air discharge opening for front or
rear air discharge.

C*

D

NOTE: Right side of paneled unit is flush with right side of floorstand. All other paneled sides overhang
floor stand 1" (25mm).
* Leveling feet are provided with ± 1-1/2" (38mm) adjustment from nominal height C.

Table 122 Floor stand and floor planning dimensions—105kW (30 ton), downflow
Height, in. (mm)
C*

D turning vane

9 (229)

4 (111)

12 (305)

7 (187)

15 (381)

10 (264)

18 (457)

13 (340)

21 (533)

16 (416)

24 (610)

19 (492)

Source: DPN001059, Rev. 2

Liebert® DS™

154

DPN001059
Rev. 2

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 124 Floor stand dimensions, piggyback drycoolers with centrifugal fans

C

B
A

1"
(25.4mm)

* H ± 1-1/2" (38mm)
For height selection
refer to chart.
Center Leg Provided
on 99" Cabinets

See Table 124 for
height selection

Leg Support on Models
18, 21 & 24" High

DPN000727
Rev. 0

Table 123 Floor stand dimensions, in. (mm)
A

B

C

PD-102, PD-133, PD-150

72 (1829)

36 (914)

31 (787)

PD-223, PD-290 PD-333

97 (2464)

48-1/2 (1232)

33 (838)

Model

Source: DPN000727, Rev. 0

Table 124 Floor stand height selection, in. (mm)
Nominal

Range (Nominal ±1-1/2 *)

9 (229)

7-1/2 to 10-1/2 (191 to 267)

12 (305)

10-1/2 to 13-1/2 (267 to 343)

15 (381)

13-1/2 to 16-1/2 (343 to 419)

18 (458)

16-1/2 to 19-1/2 (419 to 495)

21 (553)

19-1/2 to 22-1/2 (495 to 572)

24 (610)

22-1/2 to 25-1/2 (572 to 648)

Leveling feet are provided with ±1-1/2" (38mm)
Adjustment from nominal height “H”.
Source: DPN000727, Rev. 0

155

Liebert® DS™

Water-Cooled, Glycol-Cooled and GLYCOOL Systems

Figure 125 Plenum dimension—28-105kW (8-30 ton), upflow
FRONT VIEWS

REAR VIEWS

WITH GRILLE

WITH GRILLE
Panel removable
for condenser clean
out access
(Water/Glycol/GLYCOOL
models only)

WITHOUT GRILLE
34"
(864mm)

B

WITHOUT GRILLE

A

1"
(25mm)

LEFT SIDE VIEWS CHECK ONE (1):

H RIGHT SIDE VIEWS CHECK ONE (1):

WITH GRILLE

76"
(1930mm)

WITHOUT
GRILLE
SIDE VIEW - UNIT WITH PLENUM
FRONT VIEW - UNIT WITH PLENUM
Notes:
1. Typical 53-77kW (15-22 Tons) unit orientation shown with grille Plenum.
View varies by unit size and Plenum selection.
2. All Plenums are shipped flat and must be field assembled.
3. Optional grille Plenum kits must include front or rear grille.
4. Non-grille Plenums are open on the top and not designed with duct flange.

WITH GRILLE

WITHOUT
GRILLE

DPN001187
Rev. 1

Table 125 Plenum dimensions, in. (mm)—28-105kW (8-30 ton), upflow
Grille Size, in (mm) Nominal

Dimensions, in. (mm)

Front/Rear
Grilles

Model

A

B

28-42kW (8-12 ton) Air-Cooled Scroll and
Air-Cooled Digital Scroll Models
28-42kW (8-12 ton) Semi-Hermetic and
all Water/Glycol/GLYCOOL Models
53-77kW (15-22 ton) Air-Cooled Scroll and
Air-Cooled Digital Scroll Models
53-77kW (15-22 ton) Semi-Hermetic and
all Water/Glycol/GLYCOOL Models

59-1/4
(1505)
59-1/4
(1505)
82-1/4
(2089)
82-1/4
(2089)

13-3/4
(349)
26-3/4
(679)
15-3/4
(400)
26-3/4
(679)

105kW (30 ton)—All Models

105-1/4
(2673)

26-3/4
(679)

Source: DPN001187, Rev. 1

Liebert® DS™

156

18 x 55
(457 x 1397)
18 x 55
(457 x 1397)
18 x 78
(457 x 1981)
18 x 78
(457 x 1981)
(1) 18 x 20
(457 x 508)
(1) 18 x 78
(457 x 1981)

Side Grille
18 x 20
(457 x 508)
18 x 20
(457 x 508)
18 x 20
(457 x 508)
18 x 20
(457 x 508)
18 x 20
(457 x 508)

Height
in. (mm)
H
20 (508)
24 (610)
30 (762)
36 (914)

Guide Specifications

5.0

GUIDE SPECIFICATIONS

1.0

GENERAL

1.1

SUMMARY
These specifications describe requirements for a Data Center Cooling system. The system shall be
designed to control temperature and humidity conditions in rooms containing computers or electronic
equipment, with good insulation and vapor barrier.

1.2

DESIGN REQUIREMENTS
The cooling system shall be a Liebert self-contained, factory-assembled unit with downflow or upflow
air delivery. The system shall have a net total cooling capacity of ____ kW (BTUH) with a net sensible
cooling capacity of ____ kW (BTUH) based on an entering air temperature of ____ °F (°C) dry bulb and
____ °F (°C) wet bulb, based on ASHRAE127 rating method and test method. Net capacities shall
include losses due to fan motor heat. The unit is to be supplied with ____ volt ____ ph ____ Hz
electrical service.
The indoor cooling unit shall have a short circuit current rating (SCCR) of 65,000A RMS symmetrical,
determined in accordance with the U.S. National Electric Code Section 409, Standard 508a SB, based
on test data performed at certified third-party laboratories.

1.3

SUBMITTALS
Submittals shall be provided after the agreement of the proposal and shall include: Single-Line
Diagrams; Dimensional, Electrical and Capacity Data; and Piping and Electrical Connection
Drawings.

2.0

PRODUCT

2.1

FRAME
The modular constructed frame shall be welded, formed sheet metal. It shall be protected against
corrosion using the autophoretic coating process. The frame shall be capable of being separated into
three parts in the field to accommodate rigging through small spaces.

2.1.1

Downflow Air Supply, Bottom Supply, Front Throw, Centrifugal fans
The supply air shall exit from the bottom of the unit with the air thrown toward the front of the unit.

2.1.1

Downflow Air Supply, EC Fans
The supply air shall exit from the bottom of the unit, with the ability to operate the fans within the
floor stand (requires minimum 24" raised floor height), throwing the air in a horizontal direction.

2.1.1

Downflow Air Supply, Front Supply (or Rear Supply), EC Fans
The supply air shall exit from the front of the unit utilizing direct drive EC fans.

2.1.1

Downflow Air Return
The return air shall enter the unit from the top.

2.1.1

Upflow Top Air Supply, Front Throw
The supply air shall exit from the top of the cabinet with the air throw towards the front.

2.1.1

Upflow Top Air Supply, Rear Throw
The supply air shall exit from the top of the cabinet with the air throw towards the back.

2.1.1

Upflow Air Return, Front
The return air shall enter the unit from the front of the cabinet through factory installed grilles.
Grilles shall be painted black.

2.1.1

Upflow Air Return, Rear
The return air shall enter the unit from the back of the cabinet.

157

Liebert® DS™

Guide Specifications

2.1.2

Exterior Panels
The exterior panels shall be insulated with a minimum 1 in. (25mm), 1.5 lb. (0.68 kg) density fiber
insulation. The main front panel shall have captive 1/4 turn fasteners. The main unit color shall be
______.

2.1.2.1

Double-Skin Panels (Optional)
The exterior panels shall be internally lined with 20 gauge sheetmetal, sandwiching the insulation
between the panels, for easy cleaning.

2.2

FILTERS—DOWNFLOW UNIT
The filter chamber shall be located within the cabinet, and filters shall be removable from the top of
the unit.

2.2.1

Filters, 4"
Filters shall be deep pleated 4" filters with an ASHRAE 52.2 MERV8 rating (45% ASHRAE 52.1) or
ASHRAE 52.2 MERV11 rating (60-65% ASHRAE 52.1).

2.2.1

Filters, 2" Pre-Filter With 2" Filter
Filters shall be 2" ASHRAE 52.2 MERV8 (40% ASHRAE 52.1) pre-filter, with 2" ASHRAE 52.2
MERV11 (60-65% ASHRAE 52.1) efficiency filter.

2.2.2

Extra Filter Set
____ extra set(s) of filters shall be provided per system.

2.3

FAN SECTION

2.3.1

Centrifugal Blower Section
The blower section shall be designed for ___ CFM (CMH) at an external static pressure of ___ in. wg.
(Pa). The fans shall be the centrifugal type, double width double inlet and shall be dynamically
balanced as a completed assembly. The shaft shall be heavy duty steel with self-aligning,
permanently sealed, pillow block bearings with a minimum L3 life of 200,000 hours. The fans shall
draw air through the A-frame coil to ensure even air distribution and maximum coil performance. A
static regain duct shall be factory-installed to the bottom of the blower on downflow units.

2.3.1.1

Motor
The fan motor shall be ____ hp (kW) at 1750 rpm @60hz (1450 rpm @50hz), mounted to an automatic,
spring tensioning base. The motor shall be removable from the front of the cabinet.

2.3.1.1.1

Premium Efficiency Motor

The fan motor shall be Open Drip-Proof, Premium efficiency and shall meet NEMA Premium
standard. Motor efficiency shall be ____%.

2.3.1.1.1

TEFC Motor (Optional)

The motor shall be Totally Enclosed Fan Cooled for protection in harsh environments.

2.3.1.2

Drive Package
The motor sheave and fan pulley shall be double-width, fixed-pitch. Two belts, sized for 200% of the
fan motor horsepower shall be provided with the drive package. An auto-tension system shall provide
constant tension on the belts. Belts, shaft, blower bearings, sheave and pulley shall be warranted for
five years (parts only).

Liebert® DS™

158

Guide Specifications

2.3.1

Electronically Commutated (EC) Fan, Direct-Drive, Variable Speed
The fans shall be plug/plenum type, single inlet and shall be dynamically balanced, and the drive
package shall be direct drive, electronically commutated and variable speed. The fans shall be located
to draw air over the A-frame coil to ensure even air distribution and maximum coil performance. EC
fans shall be available on Downflow models only, and fans may be field- lowered into a raised floor
with minimum height of 24" in order to achieve more efficient fan operation. EC fans may operate
within the Liebert DS cabinet, instead of underfloor.
DS053, DS070, DS077 fan motor(s) shall be nominal 4.15 hp each with a maximum operating speed of
1510 rpm; quantity, two. DS105 fan motor(s) shall be nominal 3.62 hp each, with a maximum
operating speed of 2150 rpm; quantity, three.

2.4

HUMIDIFIER
A humidifier shall be factory-installed inside the unit. Bypass air slots shall be included to enable
moisture to be absorbed into the air stream. The humidifier capacity shall be ____lb./hr (kg/hr). The
humidifier shall be removable from the front of the cabinet.

2.4.1

Infrared Humidifier
The humidifier shall be of the infrared type consisting of high intensity quartz lamps mounted above
and out of the water supply. The humidifier pan shall be stainless steel and arranged to be removable
without disconnecting high voltage electrical connections. The complete humidifier section shall be
pre-piped, ready for field connection to water supply. The humidifier shall be equipped with an
automatic water supply system and shall have an adjustable water-overfeed to prevent mineral
precipitation. A high-water detector shall shut down the humidifier to prevent overflowing. A
factory-provided air-gap shall prevent backflow of the humidifier supply water.

2.4.1

Steam Generating Canister Humidifier
A canister-type steam canister shall be factory-installed in the cooling unit and shall be controlled by
the microprocessor control system. It shall be complete with disposable canister, all supply and drain
valves, steam distributor and electronic controls. The need to change canister shall be indicated on
the microprocessor control panel. The humidifier shall be designed to operate with water conductivity
from 200-500 micromhos. An air-gap within the humidifier assembly shall prevent backflow of the
humidifier supply water. Not available with EC fans or on upflow configurations.

2.5

REHEAT
The indoor cooling unit shall include a factory-installed reheat to control temperature during
dehumidification.

2.5.1

Three-Stage Electric Reheat
The electric reheat coils shall be low watt density, 304/304 stainless steel fin tubular construction,
protected by thermal safety switches, shall be ____ kW (____ BTUH) controlled in three stages. The
reheat elements shall be removable from the front of the cabinet.

2.5.1

SCR Electric Reheat
The electric reheat coils shall be low watt density, 304/304 stainless steel fin tubular construction,
protected by thermal safety switches, ____ kW (____ BTUH) controlled by multiple pulses to achieve
tight temperature control. The reheat elements shall be removable from the front of the cabinet.
Available on indoor units with standard Scroll compressors, only.

2.6

DUAL REFRIGERATION SYSTEM
Each unit shall include two (2) independent refrigeration circuits and shall include hot gas mufflers
(semi-hermetic compressors units only), liquid line filter driers, refrigerant sight glass with moisture
indicator, externally equalized expansion valves and liquid line solenoid valves. Compressors shall be
located outside the airstream and shall be removable and serviceable from the front of the unit.

159

Liebert® DS™

Guide Specifications

2.6.1

Semi-Hermetic Compressor With Four-Step Unloaders Control
The compressor shall be semi-hermetic with a suction gas cooled motor, vibration isolators, thermal
overloads, oil sight glass, automatic reset high pressure switch with control lockout after three
failures, low pressure transducer, suction line strainer, crankcase heaters, service valves, reversible
oil pumps for forced feed lubrication, a maximum operating speed of 1750 rpm. The system shall
include cylinder unloaders on the semi-hermetic compressors. The unloaders shall be activated by
solenoid valves which are controlled from the microprocessor control. In response to the return air
temperature, the microprocessor control shall activate the unloader solenoids and the liquid line
solenoids such that four stages of refrigeration cooling are obtained. The stages shall be: 1) one
compressor, partially loaded, 2) two compressors partially loaded, 3) one compressor partially loaded,
one compressor fully loaded, 4) two compressors fully loaded. On a call for dehumidification, the
microprocessor control shall insure that at least one compressor is on full for proper humidity control.
Hot Gas bypass shall not be an acceptable means of capacity control due to increased energy
consumption.

2.6.1

Scroll Compressors
The compressor shall be scroll-type with a variable capacity operation capability. Compressor
solenoid valve shall unload the compressor and allow for variable capacity operation. The compressor
shall be suction gas cooled motor, vibration isolators, thermal overloads, automatic reset high
pressure switch with lockout after three failures, rotalock service valves, crankcase heaters, low
pressure transducer, suction line strainer, and a maximum operating speed of 3500 rpm. Hot gas
bypass shall not be an acceptable means of capacity control, due to increased energy consumption.

2.6.1

Digital Scroll Compressors
The compressor shall be variable capacity, scroll-type, capable of operating between 20% and 100%
compressor capacity. The compressor shall be suction gas cooled motor, vibration isolators, thermal
overloads, automatic reset high pressure switch with lockout after three failures, rotalock service
valves, crankcase heaters, low pressure transducer, suction line strainer and a maximum operating
speed of 3500 rpm. Hot gas bypass shall not be acceptable means of capacity control, due to increased
energy consumption.

2.6.2

Evaporator Coil, DX Coil
The evaporator coil shall be A-frame design with offset orientation and have ____sq. ft. (m2) face area,
three rows deep. It shall be constructed of rifled copper tubes and aluminum fins and have a
maximum face velocity of ____ ft. per minute (m/s) at ____ CFM (CMH). A stainless steel condensate
drain pan shall be provided.

2.6.2.1

Polymeric Coating (Optional)
The coil shall be coated with a high performance polymeric coating process to provide corrosion
resistance within 2 to 12 pH range.

2.6.3

R-407C Refrigerant, non-HCFC
The system shall be designed for use with R-407C refrigerant, which meets the EPA clean air act for
phase-out of HCFC refrigerants.

Liebert® DS™

160

Guide Specifications

2.7

LIEBERT iCOM™ MICROPROCESSOR CONTROL WITH SMALL GRAPHIC DISPLAY
The Liebert iCOM unit control shall be factory-set for Intelligent Control, which uses “fuzzy logic” and
“predictive” methods. Proportional and Tunable PID shall also be user-selectable options. Internal
unit component control shall include the following:
Compressor Short Cycle Control—Prevents compressor short-cycling and needless compressor
wear.
System Auto Restart—The auto restart feature shall automatically restart the system after a
power failure. Time delay is programmable.
Sequential Load Activation—On initial startup or restart after power failure, each operational
load is sequenced with a minimum of one second delay to minimize total inrush current.
Econ-O-Coil Flush Cycles—Econ-O-Coils are periodically flushed to prevent a buildup of
contaminants.
Predictive Humidity Control—Calculates the moisture content in the room and prevents
unnecessary humidification and dehumidification cycles by responding to changes in dew point
temperature.
The Liebert iCOM control shall be compatible with all Liebert remote monitoring and control devices.
Options are available for BMS interface via Modbus, BACnet and SNMP.
The Liebert iCOM control processor shall be microprocessor based with a 128x64 dot matrix graphic
front monitor display and control keys for user inputs mounted in an ergonomic, aesthetically
pleasing housing. The display and housing shall be viewable while the unit panels are open or closed.
The controls shall be menu driven. The display shall be organized into three main sections: User
Menus, Service Menus and Advanced Menus. The system shall display user menus for active alarms,
event log, graphic data, unit view/status overview (including the monitoring of room conditions,
operational status in % of each function, date and time), total run hours, various sensors, display
setup and service contacts. A password shall be required to make system changes within the service
menus. Service menus shall include setpoints, standby settings (lead/lag), timers/sleep mode, alarm
setup, sensor calibration, maintenance/wellness settings, options setup, system/network setup,
auxiliary boards and diagnostics/service mode. A password shall be required to access the advanced
menus, which include the factory settings and password menus.
The User Menus Shall be Defined as Follows:
Active Alarms: Unit memory shall hold the 200 most recent alarms with time and date stamp for
each alarm.
Event Log: Unit memory shall hold the 400 most recent events with ID number, time and date
stamp for each event.
Graphic Data View: Eight graphic records shall be available: return air temperature, return air
humidity, supply air temperature, outdoor temperature and four custom graphs.
Unit View - Status Overview: Simple or Graphical “Unit View” summary displays shall include
temperature and humidity values, active functions (and percent of operation) and any alarms of the
host unit.
Total Run Hours: Menu shall display accumulative component operating hours for major
components including compressors, Econ-O-Coil (FC), fan motor, humidifier and reheat.
Various Sensors: Menu shall allow setup and display of optional custom sensors. The control shall
include four customer accessible analog inputs for sensors provided by others. The analog inputs shall
accept a 4 to 20 mA signal. The user shall be able to change the input to 0 to 5VDC or 0 to 10VDC if
desired. The gains for each analog input shall be programmable from the front display. The analog
inputs shall be able to be monitored from the front display.
Display Setup: Customer shall pre-select the desired grouping of display languages at the time of
the order from the following choices:
Group 1: English, French, Italian, Spanish, German
Group 2: English, Russian, Greek
Group 3: English, Japanese, Chinese, Arabic
Service Contacts: Menu shall allow display of local service contact name and phone number.

161

Liebert® DS™

Guide Specifications

The Service Menus Shall be Defined as Follows:
Setpoints: Menu shall allow setpoints within the following ranges:
• Temperature Setpoint: 65-85ºF (18-29ºC)*
• Temperature Sensitivity: +1-10ºF (0.6-5.6ºC)
• Humidity Setpoint: 20-80% RH*
• Humidity Sensitivity: 1-30% RH
• High Temperature Alarm: 35-90ºF (2-32ºC)
• Low Temperature Alarm: 35-90ºF (2-32ºC)
• High Humidity Alarm: 15-85% RH
• Low Humidity Alarm: 15-85% RH
* The microprocessor may be set within these ranges, however, the unit may not be able to control
to extreme combinations of temperature and humidity.
Standby Settings/Lead-Lag: Menu shall allow planned rotation or emergency rotation of operating
and standby units.
Timers/Sleep Mode: Menu shall allow various customer settings for turning On/Off unit.
Alarm Setup: Menu shall allow customer settings for alarm notification (audible/local/remote). The
following alarms shall be available:
• High Temperature
• Low Temperature
• High Humidity
• Low Humidity
• Compressor Overload (Optional)
• Main Fan Overload (Optional)
• Humidifier Problem
• High Head Pressure
• Change Filter
• Fan Failure
• Low Suction Pressure
• Unit Off
Audible Alarm: The audible alarm shall annunciate any alarm that is enabled by the operator.
Common Alarm: A programmable common alarm shall be provided to interface user-selected alarms
with a remote alarm device.
Remote Monitoring: All alarms shall be communicated to the Liebert monitoring system with the
following information: date and time of occurrence, unit number and present temperature and
humidity.
Sensor Calibration: Menu shall allow unit sensors to be calibrated with external sensors.
Maintenance/Wellness Settings: Menu shall allow reporting of potential component problems
before they occur.
Options Setup: Menu shall provide operation settings for the installed components.
System/Network Setup: Menu shall allow Unit-to-Unit (U2U) communication and setup for
Teamwork modes of operation (up to 32 units).
Teamwork Modes of Operation: Saves energy by preventing operation of units in opposite modes
multiple units.
Auxiliary Boards: Menu shall allow setup of optional expansion boards.
Diagnostics/Service Mode: The Liebert iCOM control shall be provided with self-diagnostics to aid
in troubleshooting. The microcontroller board shall be diagnosed and reported as pass/not pass.
Control inputs shall be indicated as on or off at the front display. Control outputs shall be able to be
turned on or off from the front display without using jumpers or a service terminal. An LED on a
circuit board will indicate each control output.
The Advanced Menus Shall be Defined as Follows:
Factory Settings: Configuration settings shall be factory-set based on the pre-defined component
operation.
Change Passwords: Menu shall allow new passwords to be set or changed.
Liebert® DS™

162

Guide Specifications

2.7

LIEBERT iCOM™ MICROPROCESSOR CONTROL WITH LARGE GRAPHIC
DISPLAY (OPTIONAL)
The Liebert iCOM unit control with large graphic display shall include all of the features as the
Liebert iCOM with small graphic display, except that it includes a larger graphical display and shall
include the additional features of: System View, Spare Parts List, Unit Diary.
The Liebert iCOM control processor shall be microprocessor based with a 320x240 dot matrix graphic
front monitor display panel and control keys for user inputs mounted in an ergonomic, aesthetically
pleasing housing.
System View - Status Overview: System View shall display a summary of operation for the total
number of operating units within a Unit-to-Unit (U2U) configuration.
Spare Parts List: Menu shall include a list of critical spare parts, their quantity and part numbers.
Unit Diary: Menu shall include a free field area within the unit memory where unit history may be
stored for reference.

2.7

LIEBERT iCOM WALL MOUNT LARGE GRAPHIC DISPLAY vNSA PANEL
(OPTIONAL)
The Liebert iCOM Large Graphic Display Kit shall include an ergonomic, aesthetically pleasing
housing, a 320x240 dot matrix graphic display and a 120V power supply. The Wall Mount Large
Graphic Display shall be used to allow remote location of a System View display and all features of
the Large Graphic User, Service and Advanced menus for use with Liebert iCOM controlled products
connected for Unit-to-Unit (U2U) communications. This panel is also used to network together so they
can be place in 1 of the 3 team work modes and lead/lag standby rotation as well as cascade mode.

2.8

DUAL-COOLING CHILLED WATER COIL
The dual-cooling source system shall consist of an air- or water-cooled compressorized (DX) system
with the addition of a chilled water coil, a modulating control valve and a comparative temperature
sensor. The system shall be able to function either as a modulating chilled water system or as a
compressorized (DX) system, or a combination of both. The primary cooling mode shall be chilled
water, if available. Switchover between the two cooling modes shall be performed automatically by
the microprocessor control.
Four (4) pipes shall be included on water/glycol systems: chilled water supply, chilled water water
return, condenser water supply and condenser water return.
Four pipes shall be included on air-cooled systems: chilled water supply, chilled water return, hot gas
refrigerant line, liquid refrigerant line.

2.8.1

Dual-Cooling Source Control Valve
The chilled water circuit shall include a three-way modulating valve. The microprocessor shall
position the valve in response to room conditions. Cooling capacity will be controlled by bypassing
chilled water around the coil. The modulating valve travel for dehumidification shall be proportional.

2.8.1

CuNi Coil Chilled Water Coil (Optional)
A 70/30 CuNi chilled water shall be provided for Dual-Cooling units that are applied to a cooling
tower loop or other open water system. This option is required on open cooling tower applications, and
constant chilled water flow must be provided in order to periodically circulate chilled water through
the coil when idle.

2.8.1.1

Polymeric Coating on Liebert Econ-O-Coil™ and DX Coil (Optional)
The coil shall be coated with a high performance polymeric coating process to provide corrosion
resistance on the exterior of the coil, within 2 to 12 pH range.

2.9

MISCELLANEOUS OPTIONS

2.9.1

Non-Locking Disconnect Switch (Optional)
The manual disconnect switch shall be mounted in the high- voltage section of the electrical panel.
The switch shall be accessible with the door closed.

163

Liebert® DS™

Guide Specifications

2.9.1

Locking Disconnect Switch (Optional)
The manual disconnect switch shall be mounted in the high voltage section of the electrical panel. The
switch shall be accessible from the outside of the unit with the door closed and prevent access to the
high voltage electrical components until switched to the “OFF” position.

2.9.2

High-Temperature Sensor (Optional)
The high-temperature sensor shall be factory-installed in the unit and shall be factory-set to 125ºF
(52ºC). It shall immediately shut down the environmental control system when activated. The sensor
shall be mounted with the sensing element in the return air.

2.9.3

Smoke Sensor (Optional)
The smoke sensor shall immediately shut down the environmental control system and activate the
alarm system when activated. The smoke sensor shall be mounted in the electrical panel with the
sensing element in the return air compartment. The smoke sensor is not intended to function as or
replace any room smoke detection system that may be required by local or national codes. The smoke
sensor shall include a supervision contact closure.

2.9.4

Condensate Pump, Dual Float (Optional)
The condensate pump shall have a minimum capacity of 145 GPH (548 l/h) at 20 ft. (58 kPa) head. It
shall be complete with integral dual-float switches, pump-and-motor assembly and reservoir. The
secondary float shall send a signal to the local alarm and shut down the unit upon high water
condition.

2.9.5

Low-Voltage Terminal Package (Optional)
Factory-installed and wired terminals shall be provided for customer connection to lock out the reheat
and humidifier upon contact closure. Two extra N/O common alarm contacts shall be provided. Two
extra remote shutdown terminals shall be provided.

2.9.6

Remote Humidifier Contact (Optional)
A pair of N/O contacts shall be provided for connection to a remote humidifier.

2.9.7

Main Fan Overload (Optional)
A pair of N/O contacts shall be factory-installed and wired to indicate Main Fan Overload.

2.9.8

Compressor Overload (Optional)
A pair of N/O contacts shall be factory-installed and wired to each compressor to indicate Compressor
Overload.

2.10

AIR-COOLED SYSTEMS
The indoor evaporator unit shall include refrigerant piping, with a factory holding charge of nitrogen.
The hot-gas and liquid lines shall be spun shut and shall include a factory-installed Schrader valve.
Field-relief of the Schrader valve shall indicate a leak-free system. Air-cooled systems shall be fieldpiped and wired to a condenser, using field-supplied refrigerant piping and wiring. The system shall
be field-charged with refrigerant, supplied by others.

2.10.1 Standard Features—Air-Cooled Microchannel Condenser Design
Condenser shall consist of microchannel condenser coil(s), propeller fan(s) direct-driven by individual
fan motor(s), electrical controls, housing and mounting legs. The Liebert air-cooled condenser shall
provide positive refrigerant head pressure control to the Precision Cooling indoor unit by adjusting
heat rejection capacity. Microchannel coils shall provide superior heat transfer, reduce air-side
pressure drop, increase energy efficiency and significantly reduce the system refrigerant volume
required. EC fans and fan operating techniques shall provide reduced maximum sound levels.
Various methods shall be available to match indoor unit type, maximum outdoor design ambient and
maximum sound requirements.

Liebert® DS™

164

Guide Specifications

2.10.1.1 Aluminum Microchannel Coil
Liebert microchannel coils shall be constructed of aluminum microchannel tubes, fins and manifolds.
Tubes shall be flat and contain multiple, parallel flow microchannels and span between aluminum
headers. Full-depth louvered aluminum fins shall fill spaces between the tubes. Tubes, fins and
aluminum headers shall be oven brazed to form a complete refrigerant-to-air heat exchanger coil.
Copper stub pipes shall be electric resistance welded to aluminum coils and joints protected with
polyolefin to seal joints from corrosive environmental elements. Coil assemblies shall be factory leaktested at a minimum of 300 psig (2068kPag). Hot gas and liquid lines shall be copper and shall be
brazed using nitrogen gas flow to the stub pipes with spun closed ends for customer piping
connections. Complete coil/piping assembly shall be then filled and sealed with an inert gas holding
charge for shipment.

2.10.1.1 Aluminum Microchannel Coil with E-Coat
Aluminum microchannel coil with E-coat shall provide a flexible epoxy coating to all coil surface areas
without material bridging between fins. E-coat shall increase coil corrosion protection and shall
reduce heat rejection capacity degradation to less than 10% after a severe 2000 hour 5% neutral salt
spray test (ref. ASTM B117). The coating process shall ensure complete coil encapsulation, and the
color shall be black.

2.10.1.2 Fan Motor/Blade Assembly
The fan motor/blade assembly shall have an external rotor motor, fan blades and fan/finger guard.
Fan blades shall be constructed of cast aluminum or glass-reinforced polymeric material. Fan guards
shall be heavy gauge, close meshed steel wire, coated with a black corrosion resistant finish. Fan
terminal blocks shall be located in an IP54 enclosure located on the top of the fan motor. Fan
assemblies shall be factory-balanced, tested before shipment and mounted securely to the condenser
structure.

2.10.1.3 EC Fan Motor
The EC Fan motors shall be electronically commutated for variable speed operation and shall have
ball bearings. The EC fans shall provide internal overload protection through built-in electronics.
Each EC fan motor shall have a built-in controller and communication module, linked via RS485
communication wire to each fan and the Premium Control Board, allowing each fan to receive and
respond to precise fan speed inputs from the Premium Control Board.

2.10.1.4 Electrical Controls
Electrical controls and service connection terminals shall be provided and factory wired inside the
attached control panel section. A locking disconnect switch shall be factory-mounted and wired to the
electrical panel and controlled via an externally mounted locking and lockable door handle. Only
high-voltage supply wiring and low voltage indoor unit communication/interlock wiring are required
at condenser installation.

2.10.1.5 EC Fan Speed & Premium Control
The EC Fan/Premium Control System shall include an electronic control board, EC fan motor(s) with
internal overload protection, refrigerant and ambient temperature thermistors and refrigerant
pressure transducers. The control board shall receive an indoor unit run signal via field-supplied low
voltage interlock wires to the compressor side switch, via field-supplied CANbus communication
wires from the indoor unit's Liebert iCOM control (future feature) or via both. The control board shall
use sensor and communication inputs to maintain refrigerant pressure by controlling each EC fan on
the same refrigerant circuit to the same speed.

2.10.1.6 Cabinet
The condenser cabinet shall be constructed of bright aluminum sheet and divided into individual fan
sections by full width baffles. Internal structural support members, including coil support frame,
shall be galvanized steel for strength and corrosion resistance. Panel doors shall be provided on two
sides of each coil/fan section to permit coil cleaning. An electrical panel shall be contained inside a
factory mounted, NEMA 3R weatherproof electrical enclosure.

165

Liebert® DS™

Guide Specifications

2.10.1.7 Mounting Legs
2.10.1.7.1

Standard Aluminum Legs

Aluminum legs shall be provided to mount unit for vertical air discharge with rigging holes for
hoisting the unit into position. Standard height is 18in. (457mm).

2.10.1.7.1

Optional Galvanized Steel Legs with Bracing

Condensers shall be shipped with [36in. (914mm)] [48in. (1219mm)] [60in. (1524mm)] mounting legs
with stabilization bracing. Legs, bracing and hardware shall be galvanized steel.

2.10.1 Air-Cooled Microchannel Condenser Accessories (Options)
2.10.1.1 Liebert Lee-Temp

™

Receiver Kit

Liebert Lee-Temp Receiver Kit shall contain an insulated, heated receiver tank with sight glasses,
mounting plate, mounting hardware, pressure relief valve, rotalock valve for refrigerant charge
isolation and piping assembly with head pressure operated 3-way valve and check valve. Components
shall be field-assembled to the condenser. The 3-way valve shall sense refrigerant head pressure and
adjust the flooding charge in the condenser coil to adjust the condenser heat rejection capacity. The
Liebert Lee-Temp heater shall be [(150W) (300W)], shall include an integral thermostat to maintain
refrigerant temperature at a minimum of 85°F (29°C) and shall require a separate power supply of
[(208/230-1-60) (120-1-60 volt)].
The Liebert Lee-Temp Kit shall function with Liebert MC variable speed fan motors and electronic
controls that lower fan speed in lower outdoor ambient temperatures for maximum energy efficiency.
This system shall allow system startup and positive head pressure control with ambient
temperatures as low as -30°F (-34.4°C).

2.10.1.2 Fusible Plug Kit
A fusible plug kit shall be field-installed on the liquid line for compliance with building codes
requiring refrigerant relief during high temperature and building fire conditions.

2.10.1.3 IBC/OSHPD Seismic Certification and IBC Wind/Snow Load Complaint
IBC/OSHPD Seismic Certification and IBC Wind/Snow Load Compliant condensers shall be provided
with any applicable bracing and field installation instructions. Condensers shall bear a label
certifying compliance with IBC/OSHPD requirements.

2.10.1.3.1

Seismic IBC/OSHPD (Optional)

Install condenser in accordance with manufacturer's installation instructions provided with seismic
option. Firmly anchor maintaining manufacturer's recommended clearances. Mounting requirement
details such as anchor brand, type, embedment depth, edge spacing, anchor-to-anchor spacing,
concrete strength, special inspection and attachment to non-building structures must be outlined and
approved by the Engineer of Record for the projection or building. Wiring and piping connections
must permit movement in three dimensions and isolate the unit from field connections. Electrical
conduit shall be flexible having at least one bend between the rigid connection at the unit cabinet and
the connection to rigid conduit or foundation. The piping flexible connection or loop must be suitable
for the operation pressure and temperature of the system. Furnish copy of manufacturer's piping
connection diagram submittal to piping contractor.

2.10.1 Standard Features—Air-Cooled Condenser, Fin-Tube Coil Design
The Liebert-manufactured outdoor air-cooled condenser shall be the low-profile, multiple direct drive,
propeller fan type. The condenser shall balance the heat rejection of the compressor at ____ °F (°C)
ambient. The condenser shall be constructed of aluminum and contain a copper tube, aluminum fin
coil arranged for (horizontal) (vertical) air discharge.

2.10.1.1 Fan Speed Head Pressure Control
The winter control system for the air-cooled condenser shall be Liebert Fan Speed Control. The
variable speed motor shall operate from 0 to 230 volts single phase, 10 to 1050 rpm. It shall be
designed with ball bearings, permanent lubrication, internal overload protection, 40°C rise at full
speed, 65°C rise at 10 rpm. The control system shall be complete with transducers, thermostats and
electrical control circuit, factory prepackaged in the integral condenser control box. The transducer
shall automatically sense the highest head pressure of either operating compressor and control the
Liebert® DS™

166

Guide Specifications

variable speed fan on the air-cooled condenser to properly maintain the head pressure. The Liebert
Fan Speed Control system shall provide positive startup and operation in ambient temperatures as
low as -20°F (-28.9°C). The air-cooled condenser shall have a ____ volt, ____ ph ____ Hz power supply.
™

2.10.1.2 Liebert Lee-Temp , Heated Receiver Head Pressure Control System
The winter control system for the air-cooled condenser shall be Liebert Lee-Temp. The Liebert
Lee-Temp system shall allow startup and positive head pressure control with ambient temperatures
as low as -30°F (-34.4°C). The Liebert Lee-Temp package shall include the following components for
each refrigeration circuit: insulated receiver, pressure relief valve, head pressure three-way control
valve and rotalock valve for isolating the refrigerant charge. The Liebert Lee-Temp receiver shall be
factory-insulated and mounted ready for the field connection to the air-cooled condenser. The Liebert
Lee-Temp heater shall require a separate power supply of ____ volt, single phase.

2.10.1 Standard Features—Liebert Quiet-Line Condenser Fin-Tube Coil Design (Optional)
Fan motors shall be 12-pole, 570 rpm, equipped with rain shields and permanently sealed ball
bearings. Motors shall include built-in overload protection. Motors shall be rigidly mounted on
die-formed galvanized steel supports. Disconnect switch shall be a standard feature.

2.10.2.1 Condenser Disconnect Switch (Optional)
A disconnect switch shall be factory-mounted and wired to the condenser control panel, accessible
from the exterior (standard on Quiet-Line models).

2.10

WATER/GLYCOL SYSTEMS
The indoor evaporator unit shall include factory installed refrigerant piping, and factory charged with
R-407C refrigerant. Water/glycol systems shall be field piped to an external heat rejection source such
as a cooling tower (by others) or drycooler with pump package.

2.10.1 Paradenser™ Cleanable Shell and Tube Condenser
The water-cooled condensers for each circuit shall be cleanable, shell-and-tube, counter flow type. The
heads shall be removable to allow for cleaning of the water tubes. Condensers shall be rated for a
maximum refrigerant pressure of 400 psi at 200°F (2758 kPa at 93.3°C). The condenser shall be
capable of operating with R-407C refrigerant. The unit shall require ____ GPM (l/m) of ____ °F (°C)
water and have a maximum pressure drop of ____ psi (kPa).

2.10.2 Water/Glycol Regulating Valve, Two-Way with Adjustable Bypass Valve
The condenser shall be pre-piped with a two-way regulating valve which is head pressure actuated. A
gate valve shall bypass the regulating valve.

2.10.2 Water/Glycol Regulating Valve, Three-Way
The condenser shall be pre-piped with a three-way regulating valve which is head pressure actuated.

2.10.2 Pressure Rating, 150 psi (1034 kPa), Scroll and Semi-Hermetic Compressors
The condenser water circuit shall be designed for a pressure of 150 psi (1034 kPa)

2.10.3 Pressure Rating, 350 psi (2413 kPa), Scroll and Semi-Hermetic Compressors
The condenser water circuit shall be designed for a pressure of 350 psi (2413 kPa)

2.10.3 Pressure Rating, 350psi (2413 kPa), Digital Scroll Models
The condenser water circuit shall be designed for a pressure of 350 psi (2413 kPa), using motorized
ball-valves to control refrigerant head pressure.

167

Liebert® DS™

Guide Specifications

2.10.3 GLYCOOL Fluid Economizer Systems
In addition to the DX (refrigerant) evaporator coil, a factory piped fluid economizer coil shall enable
the system to operate in Economizer mode when the water/glycol temperature is at least 7°F lower
than the return air temperature to the indoor unit. The system shall operate in partial economization,
supplemented by DX operation and in full economization when fluid temperatures are low enough to
offset room load. The economizer control system shall be factory installed and wired, and shall
automatically control switchover between economizer mode and DX mode.

2.10.3.1 GLYCOOL™ (Economizer) Coil
The GLYCOOL Economizer coil shall be constructed of copper tubes and aluminum fins. The coil
shall be A-frame or V-frame in order to minimize air pressure drop and maximize cooling capacity,
and shall be nested with the DX coil. The Econ-O-Coil shall be upstream of the DX coil to enable precooling of the air, during partial economizer operation. A constant flow of water shall be available to
enable the system to periodically flush the economizer coil of sediments that could cause pit corrosion
if not flushed out of the coil.
The Economizer coil shall have a net Sensible Cooling Capacity of ____ BTUH (kW) with 45°F (7.2°C)
entering glycol solution temperature. The total system shall require ____ GPM (l/s) and the total unit
pressure drop shall not exceed ____ feet of water (kPa), when in the economizer mode of operation.

2.10.3.2 GLYCOOL Three-Way Control Valve
The GLYCOOL Economizer coil shall be equipped with a fully proportional 3-way control valve,
designed for a maximum operating pressure of 150psi (1034 kPa). This motorized control valve shall
control the amount of flow to the economizer coil to control room temperature and relative humidity.

2.10.3.3 High-Pressure System, 350 psi (2413 kPa) (Option)
The GLYCOOL Economizer system shall be designed for a water/glycol static pressure of 350 psi
(2413 kPa).

2.10.4.3 CuNi Economizer Coil to Inhibit Coil Corrosion
A 70/30 CuNi Econ-O-Coil shall be provided when the Econ-O-Coil is connected to a cooling tower loop
or other open water system. This option is required on open cooling tower applications in order to
inhibit internal coil corrosion, due to lack of proper water system treatment and lack of fluid
circulation through the coil.

2.11

DRYCOOLER GLYCOL FLUID COOLER
The drycooler shall be the low profile, slow speed, multiple direct drive, propeller fan type. The
drycooler shall be constructed of aluminum and contain a copper tube aluminum fin coil with an
integral electric control panel and disconnect switch. The drycooler shall be designed for ____ °F (°C)
ambient.

2.11.1 Pump Package, Glycol System
This system shall be provided with a centrifugal pump mounted in a weatherproof and vented
enclosure. The pump shall be rated for ____ GPM (l/m) at ____ ft. of head (kPa) and operate on ____
volt, 3-phase, ____ Hz.

2.11.1 Dual Pump Package, Glycol System
The dual pump package shall include pumps, enclosure, field-mounted flow switch and a separate
factory-wired control box (including a lead/lag switch for the pumps). The standby pump shall
automatically start upon failure of the lead pump. Each pump shall be rated for ____ GPM (l/s) at ____
feet of head (kPa).

Liebert® DS™

168

Guide Specifications

2.12

LIEBERT LIQUI-TECT® SENSORS
Provide ____ (quantity) solid-state water sensors under the raised floor.

2.13

FLOOR STAND
The floor stand shall be constructed of a welded steel frame. The floor stand shall have adjustable legs
with vibration isolation pads. The floor stand shall be ____ in. (mm) high.

2.13.1 Seismic Rated Floor Stand (Optional)
The floor stand shall be seismic rated and shall be field-attached to the unit frame, and to the floor.

2.13.2 Floor Stand Turning Vane (Optional)
A turning vane shall be supplied with the floor stand and shall be designed for the specified floor
stand height.

2.14

RETURN AIR PLENUM FOR DOWNFLOW UNITS
The air plenum shall be constructed of 20 gauge steel, powder coated to match unit color. The plenum
shall be ___" high. A door shall be included in the front of the plenum to enable front filter access. Air
shall enter the plenum from the top.

2.14

DISCHARGE AIR PLENUM FOR UPFLOW UNITS, WITH DISCHARGE GRILLE(S)
The air plenum shall be constructed of 20 gauge steel, powder coated to match unit color. The plenum
shall be ___" high. Discharge air grilles shall be painted black and shall be included on the [front],
[rear], [left side], or [right side] of the plenum.

2.14

DISCHARGE AIR PLENUM FOR UPFLOW UNITS, WITHOUT DISCHARGE
GRILLE(S)
The air plenum shall be constructed of 20 gauge steel, powder coated to match unit color. The plenum
shall be ___" high. Air shall discharge from the top of the plenum.

3.0

EXECUTION

3.1

INSTALLATION OF PRECISION AIR CONDITIONING UNITS

3.1.1

General
Install precision air conditioning units in accordance with manufacturer's installation instructions.
Install units plumb and level, firmly anchored in locations indicated and maintain manufacturer's
recommended clearances.

3.1.2

Electrical Wiring
Install and connect electrical devices furnished by manufacturer but not specified to be factorymounted. Furnish copy of manufacturer's electrical connection diagram submittal to electrical
contractor.

3.1.3

Piping Connections
Install and connect devices furnished by manufacturer but not specified to be factory-mounted.
Furnish copy of manufacturer's piping connection diagram submittal to piping contractor.

3.1.4

Field Quality Control
Start cooling units in accordance with manufacturer's startup instructions. Test controls and
demonstrate compliance with requirements. These specifications describe requirements for a
computer room environmental control system. The system shall be designed to maintain temperature
and humidity conditions in the rooms containing electronic equipment.
The manufacturer shall design and furnish all equipment to be fully compatible with heat dissipation
requirements.

169

Liebert® DS™

Guide Specifications

Liebert® DS™

170

Technical Support / Service
Web Site
www.liebert.com
Monitoring
liebert.monitoring@emerson.com
800-222-5877
Outside North America: +00800 1155 4499
Single-Phase UPS & Server Cabinets
liebert.upstech@emerson.com
800-222-5877
Outside North America: +00800 1155 4499
Three-Phase UPS & Power Systems
800-543-2378
Outside North America: 614-841-6598
Environmental Systems
800-543-2778
Outside the United States: 614-888-0246

Locations

While every precaution has been taken to ensure the accuracy
and completeness of this literature, Liebert Corporation assumes no
responsibility and disclaims all liability for damages resulting from use of
this information or for any errors or omissions.
© 2013 Liebert Corporation
All rights reserved throughout the world. Specifications subject to change
without notice.
® Liebert is a registered trademark of Liebert Corporation.
All names referred to are trademarks
or registered trademarks of their respective owners.

United States
1050 Dearborn Drive
P.O. Box 29186
Columbus, OH 43229
Europe
Via Leonardo Da Vinci 8
Zona Industriale Tognana
35028 Piove Di Sacco (PD) Italy
+39 049 9719 111
Fax: +39 049 5841 257
Asia
29/F, The Orient Square Building
F. Ortigas Jr. Road, Ortigas Center
Pasig City 1605
Philippines
+63 2 687 6615
Fax: +63 2 730 9572

SL-18815_REV5_11-13

Emerson Network Power
Division: Liebert
Web: www.emerson.com

www.EmersonNetworkPower.com



---

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.5
Linearized                      : Yes
Create Date                     : 2013:11:20 16:58:53Z
Creator                         : FrameMaker 9.0
Modify Date                     : 2013:11:21 10:46:47-05:00
XMP Toolkit                     : Adobe XMP Core 4.2.1-c043 52.372728, 2009/01/18-15:08:04
Creator Tool                    : FrameMaker 9.0
Metadata Date                   : 2013:11:21 10:46:47-05:00
Producer                        : Acrobat Distiller 10.1.8 (Windows)
Document ID                     : uuid:73f34390-433d-4bf8-8638-684500985e1c
Instance ID                     : uuid:bb22748a-ccea-423d-a731-8ca436cff5a9
Format                          : application/pdf
Page Mode                       : UseOutlines
Page Count                      : 176

EXIF Metadata provided by EXIF.tools