Liebert Challenger Itr Users Manual

ITR to the manual 42110c2f-5854-455d-9f5d-7faf7b30a35f

: Liebert Liebert-Challenger-Itr-Users-Manual-571329 liebert-challenger-itr-users-manual-571329 liebert pdf

Open the PDF directly: View PDF .
Page Count: 64

Download
Open PDF In Browser	View PDF

Precision Cooling
For Business-Critical Continuity™

Liebert® Challenger™ ITR
Installation Manual - Nominal Capacities 23 or 33 kW, 50 & 60Hz

TABLE OF CONTENTS
1.0

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1

1.1

System Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1.1
1.1.2
1.1.3

Self Contained Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Chilled Water Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Split Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

2.0

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2

2.1
2.2
2.3

Room Preparation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Equipment Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Location Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.3.1

2.4

Equipment Handling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2.4.1
2.4.2

2.5

Handling With Skid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Removal of Skid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Piping Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.5.1

2.6
2.7

Remote Sensor Installation Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Drain Line . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Balancing the Air Distribution . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
2.7.1
2.7.2

Ducted Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Plenum Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12

2.8

Checklist for Completed Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

3.0

AIR-COOLED MODELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

3.1
3.2

Condenser Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
3.2.1
3.2.2
3.2.3

3.3
3.4

Refrigerant Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Fan Speed Control Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
3.4.1
3.4.2
3.4.3

3.5

Line Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Lee-Temp/Flood Back Head Pressure Control Condensers . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Materials Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Dehydration/Leak Test and Charging Procedures for R22 (standard) or R407C (Optional) . 18
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Lee-Temp/Flood Back Head Pressure Control Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
3.5.1
3.5.2
3.5.3
3.5.4

Piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Materials Supplied . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Dehydration/Leak Test and Charging Procedures for R22 (Standard) or R407C (Optional).
Charging . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

20
21
21
22

4.0

WATER-COOLED MODELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

4.1
4.2
4.3

Piping Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Water Regulating Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
4.3.1
4.3.2
4.3.3

Water Regulating Valve Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Water Regulating Valve Manual Flushing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Testing Valve Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

5.0

GLYCOL/GLYCOOL-COOLED MODELS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

5.1

Drycooler Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

i

5.2
5.3

Drycooler Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
5.3.1
5.3.2
5.3.3

5.4

Glycol Piping. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
5.4.1

5.5

Expansion Tanks, Fluid Relief Valves and Other Devices. . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Filling Instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5.5.1
5.5.2
5.5.3

5.6
5.7

Line Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Pump and Drycooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Preparing the System for Filling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Glycol Solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Filling the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Glycol Regulating Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
5.7.1
5.7.2

Glycol Regulating Valve Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Testing Valve Function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36

6.0

CHILLED WATER MODELS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .37

6.1

Piping Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37

7.0

SPLIT SYSTEM MODELS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

7.1

Location Considerations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.1.1
7.1.2

7.2

Electrical Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
7.2.1
7.2.2

7.3

Refrigerant Loop . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Quick Connect Fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42

Outdoor Air-Cooled Condensing Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Centrifugal Air-Cooled Condensing Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
7.5.1
7.5.2

7.6

Line Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Low Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Piping Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
7.3.1
7.3.2

7.4
7.5

Air-Cooled Condensing Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Water/Glycol-Cooled Condensing Units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38

Installing the Indoor Condensing Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Ducting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49

Water and Glycol-Cooled Condensing Units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
7.6.1
7.6.2
7.6.3
7.6.4

Piping Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Condenser Water Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Regulating Valve Adjustment and Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Glycol Systems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

53
53
53
53

8.0

R407C REFRIGERANT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56

8.1

Calculating Subcooling. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57

ii

FIGURES
Figure 1
Figure 2
Figure 3
Figure 4
Figure 5
Figure 6
Figure 7
Figure 8
Figure 9
Figure 10
Figure 11
Figure 12
Figure 13
Figure 14
Figure 15
Figure 16
Figure 17
Figure 18
Figure 19
Figure 20
Figure 21
Figure 22
Figure 23
Figure 24
Figure 25
Figure 26
Figure 27
Figure 28

Removing Liebert Challenger ITR from skid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Cabinet dimensions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Optional floor stand dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Piping connections for air-cooled units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Piping connections for split system fan coil units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Piping connections for water/glycol and GLYCOOL units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Piping connections for chilled water self-contained units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Electrical connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Air-cooled condensers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Air-cooled fan speed control general arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Air-cooled, Lee-Temp general arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Water-cooled general arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Johnson Controls valve adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Drycoolers and pump packages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Pump packages—expansion tank . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Glycol general arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
GLYCOOL general arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Chilled water general arrangement - horizontal flow (BR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Refrigerant piping diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Outdoor air-cooled condensing unit—horizontal air discharge models . . . . . . . . . . . . . . . . . . . . . 43
Outdoor air-cooled condensing unit—top air discharge models . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Electrical field connections, prop fan condensing module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
Detail of ceiling hanging bracket . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Centrifugal air-cooled condensing unit dimensional data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Centrifugal air-cooled condensing unit dimensional data (con't.) . . . . . . . . . . . . . . . . . . . . . . . . . 51
Split systems general arrangement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Water/glycol-cooled condensing unit dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Water/glycol-cooled condensing unit (con't.) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55

iii

TABLES
Table 1
Table 2
Table 3
Table 4
Table 5
Table 6
Table 7
Table 8
Table 9
Table 10
Table 11
Table 12
Table 13
Table 14
Table 15
Table 16
Table 17
Table 18
Table 19
Table 20
Table 21
Table 22
Table 23
Table 24
Table 25
Table 26
Table 27
Table 28
Table 29
Table 30
Table 31
Table 32
Table 33

Unit shipping weights. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Piping connection size. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Air-cooled condenser statistics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Recommended line sizes — OD copper (inches)* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Equivalent lengths (feet) for various pipe fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Indoor unit refrigerant charge lb (kg) R22 or R407C (per unit serial tag) . . . . . . . . . . . . . . . . . . 17
Line charges - refrigerant per 100 ft (30 m) of Type “L” copper tube. . . . . . . . . . . . . . . . . . . . . . . 17
Condenser refrigerant (per serial tag) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Refrigerant control settings psi (kPa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Refrigerant control settings psi (kPa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Room dew point temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Indoor unit glycol volume approximate gallons (liters) max. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Volume in standard Type “L” copper piping . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Ethylene glycol concentrations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Mounting hole dimensional data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Drycooler data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Glycol pump data* . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Refrigerant control settings psi (kPa) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Unit refrigerant charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Line charges - refrigerant per 100 ft (30 m) of Type “L” copper tube. . . . . . . . . . . . . . . . . . . . . . . 40
Recommended refrigerant lines (R22 or R407C) sizes OD copper . . . . . . . . . . . . . . . . . . . . . . . . . 40
Line coupling sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Equivalent lengths (feet) for various pipe fittings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Horizontal air discharge cabinet and floor planning dimensional data. . . . . . . . . . . . . . . . . . . . . 44
Horizontal air discharge piping and electrical connection data . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Cabinet and floor planning dimensional data - prop fan condensing modules, top
air discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Piping and electrical connections - top air discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Indoor centrifugal condensing unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Airflow CFM (CMH) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Water and glycol-cooled unit connection sizes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Water and glycol-cooled condensing unit data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
R407C pressure/temperature chart for operation and superheat (discharge/hot gas
and suction gas). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
R407C pressure/temperature chart for subcooling only (liquid measurements). . . . . . . . . . . . . . 57

iv

Introduction

1.0

INTRODUCTION

1.1

System Descriptions
Liebert Challenger ITR™ environmental control systems are available in three main system configurations:
• self contained system with a scroll compressor in the room unit
• self contained chilled water system
• split system with an evaporator section and a remote condensing unit
All three types are available in horizontal flow configurations. Each model requires three-phase
power. Units are available in 208, 230, 460, or 575 V, 60 Hz; and 200, 230 or 380/415 V, 50 Hz.
The following features are included as standard in all room units regardless of the type of system:
V-frame coil, infrared humidifier, finned tubular stainless steel electric reheat, 2" filter, individual
high voltage fused protection, and fan assembly.
Each configuration can operate with either Advanced Microprocessor Controls (A), or Advanced
Microprocessor Controls with Graphics (G). A brief description of each, including operational differences, is listed below. Check model numbers to see what is supplied with your unit.

1.1.1

Self Contained Systems
Air-Cooled Models
Complete refrigeration system including hot gas bypass and crankcase heater with standard condenser and fan speed control for 95°F (35°C) ambient at sea level.

Water-Cooled Models
Compete refrigeration system including hot gas bypass with water/glycol-cooled condenser and twoway water regulating valve with bypass.

Glycol-Cooled Models
The water-cooled model as described above plus pump package and 95°F (35°C) design ambient drycooler.

GLYCOOL Models
Complete refrigeration system including hot gas bypass with glycol condenser and three-way water regulating valve plus an integrally piped Econ-O-Coil with three-way modulating control valve.

1.1.2

Chilled Water Models
Chilled Water models include chilled water piping, three-way modulating valve and actuator assembly.

1.1.3

Split Systems
Each Air-Cooled split system consists of an evaporator section and one of the following condensing units.

Prop Fan
Includes scroll compressor, condenser coil, prop fan, high pressure switch, and Lee-Temp head pressure control. Unit is designed for outdoor location.

Centrifugal Fan
Includes scroll compressor, condenser coil, centrifugal blower assembly, high pressure switch, head
pressure control valve, Lee-Temp receiver and liquid line solenoid valve. Unit must be mounted
indoors. Duct flanges are optional.

Water/Glycol Condensing Units
Each water-cooled split system consists of an evaporator section and a water/glycol condensing unit,
which includes scroll compressor, coaxial condenser, water regulating valve, and high pressure switch.
Design pressure is 150 psi (1034 kPa) as standard and 350 psi (2413 kPa) as optional.
Each glycol-cooled split system consists of an evaporator section, a water/glycol condensing unit (as
described above), a pump package and a 95°F (35°C) design ambient drycooler.

1

Installation

2.0

INSTALLATION

2.1

Room Preparation
The room should be well insulated and must have a sealed vapor barrier. The vapor barrier in the
ceiling can be a polyethylene film type. Use a rubber or plastic base paint on concrete walls and floors.
Doors should not be undercut or have grilles in them.
Outside (or fresh) air should be kept to an absolute minimum. Outside air adds to the heating, cooling, humidifying and dehumidifying loads of the site. It is recommended that outside air be kept
below 5% of the total air circulated in the room and be preconditioned.

2.2

Equipment Inspection
Upon arrival of the unit, inspect all items for visible and concealed damage. Damage should be immediately reported to the carrier and a damage claim filed with a copy sent to Liebert or to your sales
representative.

2.3

Location Considerations
The Liebert Challenger ITR can sit on top of an accessible elevated flooring system. It may be necessary to furnish additional pedestal support below the unit to ensure maximum structural support (see
Table 1). A separate floor stand for the unit may be used as support, independent of the elevated floor
and installed prior to the flooring system.
Provide approximately 34" (864 mm) service clearance in the front and rear of the unit.
The unit can be installed between equipment racks or at the end of a row of racks. Consideration
should be given before installing refrigerant and liquid lines next to, under or above electronic equipment. Avoid placing the Liebert Challenger ITR in an alcove. Placing units too close together will
reduce the effectiveness of the air distribution.
NOTE
Locate and remove shipping screw on fan motor base.

2.3.1

Remote Sensor Installation Location
The remote temperature and humidity sensor should be installed in the cold aisle in front of the
equipment to be cooled. It should be mounted at the farthest point from the cooling unit that supply
air needs to reach but still within the unit's area of influence. The sensor should be installed at the
highest point that equipment will draw in cooled air.

2.4

Equipment Handling

! WARNING
Risk of equipment tipping over. Can cause damage, injury or death.
The instructions listed below must be adhered to when handling this unit with or without the
skid. There is the potential for this unit to tip over if handled improperly.

2

Installation

2.4.1

Handling With Skid
• Always keep the Liebert Challenger ITR upright, indoors and protected from damage.
• Do not use the extended rear door frame to lift the unit.
• If possible, transport the unit using a fork lift; otherwise, use a crane with belts or cables, avoiding pressing on the top edges of the packaging.
• If using a fork lift, make sure that the forks, if adjustable, are spread to the widest allowable distance to still fit under the skid.

NOTICE
Do not attempt to lift the Liebert Challenger ITR with the extended rear door frame.
Attempting to do so will damage the unit. Lift the unit only from its main base.

NOTICE
While on the skid, the Liebert Challenger ITR is too tall to fit through a standard height
doorway (83 inches or 2108 mm tall). Any attempt to move the unit, while on the skid,
through a standard doorway will damage the unit.

2.4.2

Removal of Skid
1. Remove the plywood skirting that keeps the skid and unit in place.
2. Raise the Liebert Challenger ITR off the skid. Liebert recommends using a fork lift (see Figure 1)
or similar machine to ensure that the unit is lifted properly.
NOTE
Lift the Liebert Challenger ITR only from its main base. Do not use the extended rear door
frame to lift the unit.
3. Once the unit is raised, the skid can be removed.

Figure 1

Removing Liebert Challenger ITR from skid

Remove plywood skirting holding
unit and skid in place.

Table 1
Model

Raise unit with fork lift
or similar machine.

Unit shipping weights
Domestic

Export

lb (kg)

lb (kg)

Model

50Hz Models
BR059E
BR065A
BR070WG
BM058G
BR101C

650 (295)
745 (340)
815 (370)
855 (390)
660 (300)

Domestic

Export

lb (kg)

lb (kg)

60Hz Models
750 (340)
845 (385)
915 (415)
955 (435)
760 (345)

BR060E
BR067A
BR071WG
BM061G
BR102C

3

650 (295)
745 (340)
815 (370)
855 (390)
660 (300)

750 (340)
845 (385)
915 (415)
955 (435)
760 (345)

Installation

Figure 2

Cabinet dimensions
Unit Weight

50 Hz Models
BR059E

60 Hz Models

lb. (kg)

BR060E

649 (294)

BR065A

BR067A

744 (337)

BR070WG

BR071WG

814 (369)

BR101C

BR102C

659 (299)

BM058G

BM061G

854 (387)

30-1/2"
(775mm)
31-1/2"
(800mm)
11-3/4"
(298mm)

8-1/2"
(216mm)

10-1/4"
(260mm)

43-5/16"
(1100mm)

UNIT
TOP VIEW
9-5/8"
(244mm)

1-5/8"
(41mm)
30-1/2"
(775mm)
32-1/2"
1-7/8"
(826mm)
(48mm)

13"
(330mm)

Standard Piping Location
12-1/2"
(318mm)

5/8"
Projection of
Display Bezel (16mm)

5-1/2"
(140mm)

Plenum Overhang
32-1/2"
(826mm)

12-5/8"
(321mm)
Standard Electrical Outlet
Location Through Unit
45-1/8"
(1147mm)

15-1/16"
(382mm)

32-1/2"
(826mm)

Discharge Air Opening
Remove Blocker Panel
for Air Discharge Left
and/or Right Side Panels

Filter Access
by Opening Door

91-1/16"
(2313mm)
Shaded area indicates
a recommended
clearance of 34" (864mm)
for component access

76"
(1930mm)

Blower Outlet with
1" (25.4mm) Flange
7/8" (22.2mm) Flange for
Duct or Plenum Connection

UNIT DIMENSIONAL DATA
REAR VIEW

Shaded area indicates a recommended
clearance of 34" (864mm) for component access
UNIT DIMENSIONAL DATA
FRONT VIEW

4

DPN001523
Pg. 2, Rev. 1

Installation

Figure 3

Optional floor stand dimensions

30-1/2"
(775mm)

1"
(25.4mm)

See Specification Sheet
for height of floor stand ordered.

30-1/2"
(775mm)

SL-11897
Pg. 7

5

Installation

2.5

Piping Considerations
Consideration should be given before installing refrigerant and liquid lines next to, under or above
electronic equipment.

2.5.1

Drain Line
A 3/4" (19.1 mm) female pipe thread (FPT) connection is provided for the evaporator coil condensate
drain. This drain line also drains the humidifier, if applicable. The drain line must be located so it will
not be exposed to freezing temperatures. The drain should be at least the full size of the drain connection and pitched a minimum of 1/8" per ft. (11 mm per meter).
NOTE
This line may contain boiling water. Select appropriate drain system materials.
The Challenger ITR comes standard with a condensate pump will require a field-supplied trap
downstream from the pump. The drain line must comply with all applicable codes.
Table 2

Piping connection size

Air-Cooled Unit Connection Sizes—in.
Model No. BR/BM
60Hz (50Hz)

Liquid Line O.D. Copper
L

Hot Gas Line O.D. Copper
HG

067A (065A)

1/2

7/8

Split System Fan Coil Unit Connection Sizes—in.
Model No. BR/BM
60Hz (50 Hz)

Liquid Line
L

Suction Line
SC

060E (059E)

1/2 O.D. Cu

1-1/8 O.D. Cu

All Units: Connection Sizes—in.
Humidifier Line
O.D. Copper
H

Condensate
Drain Line
C

Condensate Pump Line
O.D. Copper
P

1/4

1/2 OD Cu

1/2

Hot Water Reheat
O.D. Copper
Supply HWS

Return HWR

5/8

5/8

Water/Glycol-Cooled Unit Connection Sizes—in.
Model No. BR/BM
60Hz (50 Hz)

Supply Line
S

Return Line
R

071WG (070WG)

1-1/8

1-1/8

GLYCOOL Unit Connection Sizes —in.
Model No. BR/BM
60Hz (50 Hz)

Supply Line
S

Return Line
R

061G (058G)

1-1/8

1-1/8

Chilled Water Unit Connection Sizes—in.
Model No. BR/BM
60Hz (50 Hz)

Supply Line
CWS

Return Line
CWR

102C (101C)

1-1/8

1-1/8

6

Installation

Figure 4

Piping connections for air-cooled units
Piping outlet locations through the
plenum are the same as the unit.
See below for descriptions and
connection sizes.

Humidifier Water
Supply Line 1/4" OD CU

Hot Water Return
5/8" OD CU (optional)

Hot Gas Refrigerant Line
7/8" OD CU on Models
BR067A/BR065A

Liquid Refrigerant Line
1/2" OD CU on Models BR067A/BR065A

Condensate Pump
Line 1/2" OD CU

Hot Water Supply
5/8" OD CU (optional)

Monitoring Panel

PIPING OUTLET LOCATIONS
(See Cabinet and Floor Planning
Dimensional Data for Piping
Opening Sizes.)

DPN001525
REV 0

7

Installation

Figure 5

Piping connections for split system fan coil units
Piping outlet locations through the
plenum are the same as the unit.
See below for descriptions and
connection sizes.

Hot Water Return
5/8" OD CU (optional)

Humidifier Water Supply Line
1/4" OD CU
Suction Refrigerant Line
1 1/8" OD CU on
Models BR060E/BR059E

Liquid Refrigerant Line
1/2" OD CU on Models
BR060E/BR059E

Condensate Pump Line
1/2" OD CU

Hot Water Supply
5/8" OD CU (optional)

Monitoring Panel

PIPING OUTLET LOCATIONS
(See Cabinet and Floor Planning
Dimensional Data for Piping
Opening Sizes.)

DPN001534
REV 0

8

Installation

Figure 6

Piping connections for water/glycol and GLYCOOL units
Piping outlet locations through the
plenum are the same as the unit.
See below for descriptions and
connection sizes.

Humidifier Water Supply Line
1/4" OD CU

Hot Water Return
5/8" OD CU (optional)

Condenser Return Line
1 1/8" OD CU on
Models BR071WG/BR070WG

Condenser Supply Line
1-1/8" OD CU on
Models BR071WG/BR070WG

Condensate Pump Line
1/2" OD CU

Hot Water Supply
5/8" OD CU (optional)

Monitoring Panel

PIPING OUTLET LOCATIONS
(See Cabinet and Floor Planning
Dimensional Data for Piping
Opening Sizes.)

DPN001528
REV 0

9

Installation

Figure 7

Piping connections for chilled water self-contained units
Piping outlet locations through
the plenum are the same as the
unit. See below for descriptions
and connection sizes.

Humidifier Water Supply
Line 1/4" OD CU

Hot Water Return
5/8" OD CU (optional)

Chilled Water Supply Line
1-1/8" OD CU

Chilled Water Return Line
1-1/8" OD CU

Condensate Pump Line
1/2" OD CU

Hot Water Supply
5/8" OD CU (optional)

Monitoring Panel

PIPING OUTLET LOCATIONS
(See Cabinet and Floor Planning
Dimensional Data for Piping
Opening Sizes.)

DPN001531
REV 0

10

Installation

2.6

Electrical Connections
Three-phase electrical service is required for all models in either 208, 230, 460, or 575 V, 60 Hz; or
200, 230, or 380/415 V, 50 Hz. Electrical service shall conform to national and local electrical codes.
Refer to equipment nameplate regarding wire size and circuit protection requirements. Refer to electrical schematic when making connections.
A manual electrical disconnect switch should be installed within 5 feet (1.6 m) of the Liebert Challenger ITR in accordance with codes. A factory-supplied, locking disconnect switch is factory-mounted
within the unit behind the front door.

! WARNING
Risk of electric shock. Can cause injury or death.
Disconnect all local and remote electric power before working within the unit. Use a voltmeter
to make sure power is turned off before making any electrical connections.

NOTICE
Three-phase power must be connected to the Liebert Challenger ITR line voltage terminals in
the proper sequence so that scroll the compressor rotates in the proper direction.
Figure 8

Electrical connections
1
Electrical Handy Box*
(factory-installed with cover)
15
70

2

71

3
7

4

8

8

37C 38C 37B 38B 37 38

9

9

24 50 51 55 56

10

77 78

1

5

6

Terminal Block*
(for customer connections)

13

14

16

17

12

11

13

75 76 82 83 84 85 88 89 91 92 93 94 95 96 97

1

2

3

4

DPN001524
REV 0

1. Electric conduit knockouts on top and bottom of electric box. Knockout size 1-3/4" (44.5mm).
2. Three phase connection. Electric service connection terminals when factory disconnect switch
is supplied.
3. Factory-installed locking disconnect switch.
4. Three-phase electric service not by Liebert.
5. Earth ground connection (50/60Hz). Connection terminal for field-supplied earth grounding wire.
6. Earth ground bar (50Hz only). Connection terminals with factory ground from each high
voltage component for field supplied earth grounding wire.
7. Control and monitoring section of electric box.
8. Remote unit shutdown. Replace existing jumper between Terminals 37 + 38 with normally
closed switch having a minimum 75VA, 24VAC rating. Use field-supplied Class 1 wiring. Two
additional contact pairs available as an option (labeled as 37B & 38B, 37C & 38C). Replace
existing jumper for appropriate pair as done for 37 & 38.

11

Installation

9. Special alarm connections. Field-supplied 24V Class 1 wiring for special alarm. Connection
made by adding normally open contacts between terminals 24 + 50. Optional additional
connections available with Advanced or Advanced with Graphics controls and appropriate
optional accessories (connections 51, 55, and 56).
10. Liebert SiteScan® connection. Terminals 77 (-) and 78 (+) are for connection of a 2-wire, twisted
pair, communication cable (available from Liebert or others) to optional Liebert SiteScan.
11. Remote condensing unit connection. Field-supplied 24V Class 1 wiring to remote condensing
unit terminals 1, 2, 3, & 4 from (R2) relay (split system only).
12. Smoke detector alarm connections. Field-supplied 24V Class 1 wiring to remote alarm circuits.
Factory-wired contacts from optional smoke detector are #91-comm., #92-NO, and #93-NC.
13. Common alarm connection. Field-supplied 24V Class 1 wiring to common alarm terminals 75 + 76
(and optional 94 + 95, and 96 + 97), which are factory-connected to common alarm relay (R3).
14. Reheat and Humidifier Lockout. Optional emergency power lockout of reheat and/or humidifier:
connections provided for remote 24V AC source.
15. Heat rejection connection. Field-supplied 24V Class 1 wiring to interlock heat rejection from
pigtails 70 + 71 which are factory-connected to compressor side switch (self-contained units only
and to Glycool relay (R5), Glycool units only).
16. Main Fan Auxiliary Switch. Optional main fan auxiliary side switch. Terminals located in field
wiring compartment for remote indication that the evaporator fan motor/unit is on. Field to
connect 24V maximum.
17. Optional Condensate Alarm (Dual Float Condensate Pump only). Relay terminals located in field
wiring compartment for remote indication.
*Located inside Liebert Challenger ITR on top.
NOTE: Refer to specification sheet for full load amp. and wire size amp. ratings.

2.7

Balancing the Air Distribution

2.7.1

Ducted Applications
For ducted applications, the duct work may be attached to the top perimeter of the Liebert Challenger
ITR (see Figure 2).
The duct work must allow access to the motors/blowers for maintenance. The duct work must be
designed within the capacity of the Liebert Challenger ITR, otherwise air flow and performance will
be compromised.

2.7.2

Plenum Installation
A solid plenum or plenum with discharge grille(s) may be installed. The plenum and instructions for
its installation ship separately from the Liebert Challenger ITR.

12

Installation

2.8

Checklist for Completed Installation
___ 1. Unpack and check received material.
___ 2. Proper clearance for service access has been maintained around the equipment.
___ 3. Equipment is level and mounting fasteners are tight.
___ 4. Piping completed to refrigerant or coolant loop (if required). Piping has been leak checked,
evacuated and charged (if required).
___ 5. Check piping within the Liebert Challenger ITR and outside of the unit. Remove potential of
rub-through or chaffing.
___ 6. Condensate pump installed.
___ 7. Drain line connected.
___ 8. Water supply line connected to humidifier (if required).
___ 9. Field provided pan with drain installed under all ceiling mounted fluid condensing units (if
installed).
___ 10. Ducting completed (if applicable).
___ 11. Filter(s) installed.
___ 12. Line voltage to power wiring matches equipment serial tag.
___ 13. Power wiring connections completed between disconnect switch, evaporator and condensing
unit, including earth ground.
___ 14. Power line circuit breakers or fuses have proper ratings for equipment installed.
___ 15. Control wiring connections completed to evaporator and condensing unit.
___ 16. Verify water detection is properly installed around all units (if installed).
___ 17. All wiring connections are tight.
___ 18. Control panel DIP switches set based on customer requirements.
___ 19. Foreign materials have been removed from, in and around all equipment installed (literature,
shipping materials, construction materials, tools, etc.).
___ 20. Fans and blowers rotate freely.
___ 21. Inspect all piping connections for leaks during initial operations. Correct as needed.
___ 22. Verify that a blank start-up sheet has been sent with the unit(s) and is ready to be completed
by the installer.

13

Air-Cooled Models

3.0

AIR-COOLED MODELS

3.1

Condenser Location
The air-cooled condenser should be located for maximum security and maintenance accessibility.
Avoid ground level sites with public access or areas that contribute to heavy snow or ice accumulations. Utilize centrifugal condensers whenever interior building locations must by used. To assure
adequate air supply, it is recommended that condensers be located in a clean air area, away from
loose dirt and foreign matter that may clog the coil. In addition, condensers should not be located in
the vicinity of steam, hot air, or fume exhausts. Also, condensers should be located no closer than
three feet (1 meter) from a wall, obstruction, or adjacent unit.
Install condensers in a level position to assure proper refrigerant flow and oil return. For roof installation, mount condensers on steel supports in accordance with local codes. To minimize sound and
vibration transmission, mount steel supports across load bearing walls. For ground installation, a
concrete pad will provide adequate support. Condenser legs have mounting holes for securing the condenser to the steel supports or concrete pad.

3.2

Electrical Connections
Refer to equipment nameplate regarding wire size and circuit protection requirements. Refer to electrical schematic when making connections. Make all wiring and electrical connection in accordance
with local and national codes.

! WARNING
Risk of electric shock. Can cause injury or death.
Disconnect all local and remote electric power before working within the unit. Use a voltmeter
to make sure power is turned off before making any electrical connections.

3.2.1

Line Voltage
Line voltage electrical service is required for all air-cooled condensers at the location of the condenser.
This power supply does not have to be the same voltage as the indoor unit. This separate power source
may be 208, 230, 460, or 575 V, 60 Hz; or 200, 230, or 380/415 V, 50 Hz. The disconnect switch may be
factory-supplied and mounted in the electrical panel or field-supplied and mounted per local and
national codes.

3.2.2

Low Voltage
A control interlock between the condenser and the indoor unit is required and is connected between
70 and 71 in the handy box of the indoor unit and the electric panel of the air-cooled condenser. NEC
Class 1 wiring is required.

3.2.3

Lee-Temp/Flood Back Head Pressure Control Condensers
Lee-Temp condensers require a separate power supply for the heated receivers. This power supply is
connected to the electrical connection box on the end of the receiver.

14

Air-Cooled Models

Figure 9

Air-cooled condensers
LEE-TEMP CONDENSER

Lee-Temp heater pad
connection box

FAN SPEED CONDENSER

*B
Hot gas
line

Electric service
supplied by
others
*B
Liquid line
Hot gas line

Electric
service
supplied by
others

*B - Inverted traps are to be field-supplied and installed
(typ). When installing traps, provide clearance for swing
end of access door. Traps are to extend above base of
coil by a minimum of 7-1/2" (190 mm)

Liquid line
Secure each leg to condenser frame at all
points shown using hardware provided.

SINGLE FAN
AIR-COOLED CONDENSERS
43-9/16"
(1106mm)

51-7/16"
(1306.5mm)

18" (457.2mm)

37-7/8"
(962mm)

CONDENSER MOUNTING

43-3/16"
(1097mm)

44"
(1118mm)

1"
1-3/4"
4-1/4"
(25.4mm) (44.5mm) (108mm)

1-3/4"
(44.5mm)

1-3/4"
(44.5mm)

37-11/16"
(957.3mm)

9/16" (14.3mm)
diameter holes
8 places for
1/2" (12.7mm)
diameter bolts

1-3/4"
(44.5mm)

4-1/4"
(108mm)

1"
(25.4mm)

A

Common to all models. See Table 3
below for key to “A” dimension.

Air-cooled condenser statistics
Connection Sizes
(OD Copper)

Model

Number
of Fans

Hot Gas (in.)

Liquid (in.)

Net Weight
lb (kg)

“A” Dimension
in (mm)

083

1

7/8

5/8

295 (133.8)

42 (1067)

104

1

1-1/8

5/8

315 (142.8)

42 (1067)

15

1" typ.
(25.4mm)

1-3/4"
(44.5mm)

TYPICAL FOOTPRINT

Table 3

1" typ.
(25.4mm)

Air-Cooled Models

3.3

Refrigerant Piping
All refrigeration piping should be installed with high temperature brazed joints. Prevailing good
refrigeration practices should be employed for piping supports, leak testing, dehydration and charging of the refrigeration circuits.
Unit refrigeration components and piping are shipped from the factory with a nitrogen holding
charge.
NOTE
The refrigeration piping should be isolated from the building by the use of vibration isolating
supports.
NOTE
Piping, including inverted trap(s), must be routed to allow unobstructed access to the panel
per the NEC.
NOTE
When installing field piping, care must be taken to protect all refrigerant lines from the
atmosphere, especially when using refrigerants with POE oils. Do not allow the piping to stand
open to air for more than 15 minutes. Units designed for R407C have a compressor that
contains POE oil that is very hygroscopic; that is, it quickly absorbs water from the air. The
longer the compressor piping is left open to air, the harder it will be to fully evacuate. If left
open too long, the POE oil may need to be replaced before achieving the required vacuum level.
NOTE
Keep the evaporator unit and condenser closed with their factory charge of dry nitrogen while
all field piping is installed. Keep the field piping clean and dry during installation, and do not
allow it to stand open to the atmosphere. When all the field interconnecting piping is in place,
vent the condenser dry nitrogen charge and connect to the field piping. Finally, vent the
evaporator unit dry nitrogen charge and make its piping connections last.
Follow all proper brazing practices including a dry nitrogen purge to maintain system
cleanliness.
Traps should be installed in the hot gas line on vertical risers at the base and every 25 feet (7.6
meters) in elevation. These traps will collect condensed refrigerant and refrigerant oil during the off
cycle of the unit and ensure flow of refrigerant oil during operation.
A check valve is factory-supplied with the unit to be field-installed on the discharge side of the scroll
compressor. Be sure to install the check valve with the refrigerant flow in the proper direction. When
soldering or brazing the valve, it is very important to protect the internal parts by wrapping the valve
with a damp cloth to keep the valve temperature below 250°F (121°C).
Approval is required whenever:
• a refrigerant piping run exceeds 150 ft. (46 m) equivalent length
• an R22 system condenser must be located more than 15 ft. (4.6 m) below the level of the cooling
coil
• an R407C system condenser must be located below the level of the cooling coil.
Total discharge line pressure drop must not exceed 10 PSIG (69 kPa).
Consult your local Liebert representative when considering installations outside these guidelines.
Table 4

Recommended line sizes — OD copper (inches)*

Equivalent Length
50 ft. (15 m)
100 ft. (30 m)
150 ft. (45 m)

23 & 33 kW 067A (065A)
Hot Gas Line Liquid Line
7/8
1/2
7/8
5/8
7/8
5/8

*Recommended vertical line sizes must be used for proper oil return at all cooling and dehumidification steps.

16

Air-Cooled Models

Table 5

Equivalent lengths (feet) for various pipe fittings

Copper Pipe
O.D. in.
1/2
5/8
3/4
7/8
1-1/8
1-3/8
1-5/8

90 Degree
Elbow Copper
0.8
0.9
1.0
1.45
1.85
2.4
2.9

90 Degree
Elbow Cast
1.3
1.4
1.5
1.8
2.2
2.9
3.5

45 Degree
Elbow
0.4
0.5
0.6
0.8
1.0
1.3
1.6

Tee
2.5
2.5
2.5
3.6
4.6
6.4
7.2

Gate
Valve
0.26
0.28
0.3
0.36
0.48
0.65
0.72

Globe
Valve
7.0
9.5
12.0
17.2
22.5
32.0
36.0

Angle
Valve
4.0
5.0
6.5
9.5
12.0
16.0
19.5

Refrigerant trap = 4 times equivalent length of pipe per this table.

Table 6

Indoor unit refrigerant charge lb (kg) R22 or R407C (per unit serial tag)
R22

R407C

Model

Approximate Charge
lb (kg)

Approximate Charge
lb (kg)

67A/65A

1.5 (0.68)

1.4 (0.6)

Table 7

Line charges - refrigerant per 100 ft (30 m) of Type “L” copper tube
R22

R407C

O.D.

Liquid Line
lb (kg)

Hot Gas Line
lbs (kg)

Liquid Line
lb (kg)

Hot Gas Line
lb (kg)

1/2"

7.3 (3.3)

1.3 (0.6)

6.9 (2.9)

-

5/8"

11.7 (5.3)

2.1 (1.0)

11.0 (4.6)

2.2 (0.9)

3/4"

16.6 (7.5)

3.0 (1.4)

15.7 (6.5)

3.1 (1.3)

7/8"

24.4 (11.1)

4.4 (2.0)

23.0 (9.6)

4.5 (1.9)

Table 8

Condenser refrigerant (per serial tag)
R22

R407C

Approximate Charge
lb (kg)

Approximate Charge
lb (kg)

Model

Fan Speed

Lee-Temp*

Fan Speed

Lee-Temp*

083

5 (2.27)

27 (12.3)

8 (3)

25 (12)

104

8 (3.63)

39 (17.7)

9 (4)

37 (17)

* Charge includes the receiver charge.

3.4

Fan Speed Control Systems
Fan Speed Control provides an infinite number of speed variations on specially designed, permanent
split-capacitor motors. The control module varies the air quantity passing over the condenser coil by
monitoring refrigerant pressure.

3.4.1

Materials Supplied
1.
2.
3.
4.
5.
6.

Built-in pre-wired condenser control box
Air-cooled condenser
Piping access cover to be reinstalled when piping is complete
Bolts (four per leg) 3/8" x 5/8"
Terminal block for two-wire, 24-volt interlock connection between unit and condenser
Condenser legs, four on one-fan models

17

Air-Cooled Models

3.4.2

Dehydration/Leak Test and Charging Procedures for R22 (standard) or R407C (Optional)
Fan Speed Control Type Condenser

! CAUTION
All local codes for handling refrigerant must be followed.
NOTE
As R22 and R407C are similar in properties, proper safety equipment and proper
refrigeration tools are required on both types. Check unit nameplate for correct refrigerant
type before topping off or recharging a system.
NOTE
Refrigerant R407C uses a POE (polyol ester) lubricant. The R407C refrigerant must be
introduced and charged from the cylinder only as a liquid.
NOTE
When installing field piping, care must be taken to protect all refrigerant lines from the
atmosphere, especially when using refrigerants with POE oils. Do not allow the piping to stand
open to air for more than 15 minutes. Units designed for R407C have a compressor which
contains POE oil that is very hygroscopic; that is, it quickly absorbs water from the air. The
longer the compressor piping is left open to air, the harder it will be to fully evacuate. If left
open too long, the POE oil may need to be replaced before achieving the required vacuum level.

Dehydration/Leak Test
1. Make sure unit is OFF. Open all disconnects and remove all fuses except control fuses. On units
supplied with circuit breakers, open all breakers except for the transformer.
2. Add a jumper to the Fan Safety Switch between Common and Normal Open and disconnect the
wire connected to the Normally Closed. Turn unit disconnect ON. (Fan operation not required.)
NOTE
The above allows the technician to use unit 24 VAC power and controls to open liquid line
solenoid valve(s) and hot gas bypass solenoid valve(s) for the dehydration process. If no
power is at the unit disconnect, the technician is to use a separate 24 VAC source rated at
75 VA and connect to the system liquid line solenoid valve(s) and hot gas bypass solenoid
valve(s) directly.
3. Connect refrigeration gauges to the suction and discharge service valves of the compressor. Open
all compressor service valves.
4. To energize the liquid line solenoid valves through the control system power, set the control
temperature setpoint (see operation manual) to 60°F (15°C) and set the % relative humidity
setpoint higher than the conditioned room ambient to ensure that solenoid valves and hot gas
bypass valves are open during the dehydration process.
5. Pressurize the system circuit(s) to 150 PSIG (1034 kPa) by using dry nitrogen with a trace of
refrigerant. Check system for leaks with suitable leak finder.
6. After completion of leak testing, release the test pressure (per local code) and pull a deep vacuum
on the system with a suitable pump.
7. After four hours, check the pressure readings, and if they have not changed, break vacuum with
refrigerant. Pull another vacuum to 250 microns or less. Recheck the pressure after two hours.
After completing this step, pressurize the circuits with refrigerant (R407C liquid or R22 vapor per
unit nameplate) until suction and discharge pressures have equalized.

18

Air-Cooled Models

Figure 10 Air-cooled fan speed control general arrangement

Condenser
Coil
Schrader
Valve
Fusible
Plug
Inverted Traps* on discharge
and return lines to extend
above base of coil by a
minimum of 7 1/2" (190mm)

Evaporator
Coil

Traps* every
25 ft. (7.6m)
of rise
Hot Gas
Bypass
Valve
Liquid Return

Shutoff *
Valve

Expansion
Valve

Solenoid
Valves

Sensing
Bulb

Sight
Glass

Filter
Dryer

External
Equalizers
Service
Valves

Hot Gas
Bypass

Hot Gas
Discharge

Scroll
Compressor

Check Valve
(Shipped Loose for
Field Installation)
SINGLE CIRCUIT SHOWN
FACTORY
PIPING
FIELD
PIPING

19

*Components are not supplied by Liebert but
are recommended for proper circuit operation
and maintenance.
SL-11897 PG 5

Air-Cooled Models

3.4.3

Charging
1. Make sure unit is OFF. Open all disconnect switches and, on units supplied with circuit breakers,
open all breakers. Replace all fuses for the Fan and Compressors or close breakers.
2. Remove jumper on the Fan Safety Switch and reconnect the system wire connections. Ensure that
all operational components are clear of debris. Turn unit ON. (Fan operation is required.) Check
the evaporator fan for proper rotation and correct if necessary.
3. Connect the refrigerant gauge charging hose to the drum of refrigerant and to the suction and
discharge service valves of the compressor.
4. Calculate the amount of charge for the system. Weigh in as much of the system charge as
possible. Refer to the unit, condenser and refrigerant line charge tables.
5. Set the control temperature setpoint (see operation manual) to 60°F (15°C) and set the % relative
humidity setpoint higher than the conditioned room ambient to ensure that solenoid valves and
hot gas bypass valves are open during the charging procedure. You may have to bypass the
LP Switch (low pressure switch) to start the compressors and stop short cycling. Reset the Head
Pressure switch(es) if open.
6. Add refrigerant (R407C liquid, or R22 vapor per unit nameplate) to the suction side of the
compressor until there is sufficient pressure to energize the low-pressure switch.
NOTE
When adding refrigerant to an operating system, it may be necessary to add the refrigerant
through the compressor suction service valve. Because the refrigerant leaving the
refrigerant cylinder must be in a liquid state, care must be exercised to avoid damage to the
compressor. It is suggested that a sight glass be connected between the charging hose and
the compressor suction service valve. This will permit adjustment of the cylinder hand
valve so that liquid can leave the cylinder while allowing vapor to enter the compressor.
Then you may remove the manual bypass you applied earlier.
7. Charge the unit until the liquid line sight glass becomes clear. Then add one additional pound of
refrigerant.
8. As head pressure builds, the condenser fan starts rotating. The fan becomes fully energized when
sufficient head pressure is developed. (Fan starts to rotate at 190 psi and is full speed at 250 psi.)
Table 9

3.5

Refrigerant control settings psi (kPa)

Low Pressure
Cut Out

Low Pressure
Cut In

High Pressure
Cut Out

20 (137.9)

65 (448.2)

360 (2482)

Lee-Temp/Flood Back Head Pressure Control Systems
The Lee-Temp system consists of a modulating type head pressure control valve and insulated
receiver with heater pad to ensure operation at ambient temperatures as low as -30°F (-34.4°C).

3.5.1

Piping
Lee-Temp systems have two factory-supplied, field-installed check valves: one on the discharge side of
the scroll compressor and one on the inlet side of the receiver. Be sure to install the check valves with
the refrigerant flow in the proper direction. When soldering or brazing the valves, it is very important
that the internal parts be protected by wrapping the valve with a damp cloth to keep the valve temperature below 250°F (121°C).

20

Air-Cooled Models

3.5.2

Materials Supplied
1.
2.
3.
4.
5.
6.
7.

Built-in pre-wired condenser control box
Air-cooled condenser
Piping access cover to be reinstalled when piping is complete
Bolts (four per leg) 3/8" x 5/8"
Terminal block for two-wire 24V interlock connection between the unit and the condenser
Condenser legs: four on one-fan models
Lee-Temp system:
a. Insulated storage receiver
b. Head pressure control valve with integral check valve
c. Adapter assembly
d. Rotalock valve
e. Pressure relief valve
f. Liquid level sight glass
g. Check valve

8. Bolts - (six per receiver) 3/8" x 1"
NOTE
Lee-Temp heater pad requires a separate, continuous electrical source of either 115 VAC or
200/208/230 VAC.

3.5.3

Dehydration/Leak Test and Charging Procedures for R22 (Standard) or R407C (Optional)
Lee-Temp Control Type Condenser

! CAUTION
All local codes for handling refrigerant must be followed.
NOTE
As R22 and R407C are similar in properties, proper safety equipment and proper refrigeration
tools are required on both types. Check unit nameplate for correct refrigerant type and oil type
before topping off or recharging a system.
NOTE
Refrigerant R407C uses a POE (polyol ester) lubricant. The R407C refrigerant must be
introduced and charged from the cylinder only as a liquid.
NOTE
When installing field piping, care must be taken to protect all refrigerant lines from the
atmosphere, especially when using refrigerants with POE oils. Do not allow the piping to stand
open to air for more than 15 minutes. Units designed for R407C have a compressor which
contains POE oil that is very hygroscopic; that is, it quickly absorbs water from the air. The
longer the compressor piping is left open to air, the harder it will be to fully evacuate. If left
open too long, the POE oil may need to be replaced before achieving the required vacuum level.

21

Air-Cooled Models

Dehydration/Leak Test
1. Make sure unit is OFF. Open all disconnect switches and pull all fuses except control fuses. On
units supplied with circuit breakers, open all breakers except for the transformer.
2. Add a jumper to the Fan Safety Switch between Common and Normal Open and disconnect the
wire connected to the Normally Closed. Turn unit disconnect ON. (Fan operation not required.)

3.
4.
5.

6.
7.
8.

3.5.4

NOTE
The above allows the technician to use unit 24 VAC power and controls to open liquid line
solenoid valve(s) and hot gas bypass solenoid valve(s) for the dehydration process. If no power
is at the unit disconnect, the technician is to use a separate 24 VAC source rated at 75 VA and
connect to the system liquid line solenoid valve(s) and hot gas bypass solenoid valve(s) directly.
Connect refrigeration gauges to the suction and discharge service valves of the compressor and open.
Attach a “jumper” hose from the Rotalock fitting on the outlet of the receiver and the Schrader fitting
on the liquid header of the condenser. Front seat the Rotalock valve approximately two turns.
To energize the liquid line solenoid valve(s) through the control system, set the temperature
setpoint (see operation manual) to 60°F (15°C) and set the % relative humidity setpoint higher
than the conditioned room ambient to ensure that solenoid valves and hot gas bypass valves are
open during the dehydration process.
Pressurize system circuit(s) to 150 PSIG (1034 kPa) by using dry nitrogen with a trace of
refrigerant. Check system for leaks with suitable leak finder.
After completion of leak testing, release test pressure (per local code) and pull a vacuum on the
system.
After 4 hours, check pressure readings and, if they have not changed, break vacuum with
refrigerant. Pull a second and third vacuum of 250 microns or less. Recheck pressure after
2 hours.

Charging
1. Make sure unit is OFF. Open all disconnect switches and, on units supplied with circuit breakers,
open all breakers. Replace all fuses for the Fan and Compressors or close breakers.
2. Remove jumper on the Fan Safety Switch and reconnect the system wire connections. Ensure that
all operational components are clear of debris. Turn unit ON. (Fan operation is required.) Check
the evaporator fan for proper rotation and correct if necessary.
3. Connect the refrigerant gauge charging hose to the drum of refrigerant and to the suction and
discharge service valves of the compressor(s).
4. Calculate the amount of charge for the system. Weigh in as much of the system charge as
possible. Refer to the unit, condenser and refrigerant line charge tables.
5. Set the control temperature setpoint (see operation manual) to 60°F (15°C) and set the % relative
humidity setpoint higher than the conditioned room ambient to ensure that solenoid valves and
hot gas bypass valves are open during the charging procedure. You may have to bypass the
LP Switch (low pressure switch) to start the compressors and stop short cycling. Reset the Head
Pressure switch(es) if open.
6. Add refrigerant (R407C liquid or R22 vapor per unit nameplate) to the suction side of the
compressor until there is sufficient pressure to energize the low pressure switch.
NOTE
When adding refrigerant to an operating system, it may be necessary to add the refrigerant
through the compressor suction service valve. Because the refrigerant leaving the
refrigerant cylinder must be in a liquid state, care must be exercised to avoid damage to the
compressor. It is suggested that a sight glass be connected between the charging hose and
the compressor suction service valve. This will permit adjustment of the cylinder hand
valve so that liquid can leave the cylinder while allowing vapor to enter the compressor.
Then you may remove the manual bypass you applied earlier.
7. Charge the unit until the proper charge is weighed in.
Table 10 Refrigerant control settings psi (kPa)
Low Pressure Cut Out

Low Pressure Cut In

High Pressure Cut Out

20 (137.9)

65 (448.2)

360 (2482)

22

Air-Cooled Models

Figure 11 Air-cooled, Lee-Temp general arrangement

Inverted Trap * on
discharge line to
extend above base
of coil by a
minimum of 7 1/2"
(190mm)

Condenser Coil

Piping Assembly * *
Check Valve
Head Pressure
Control with
Integral Check
Valve

Rotalock Valve **
1/4" ( 6.4mm)
Pressure Relief
Valve * *

Lee-Temp
Receiver

Sight Glass
Traps * Every
25 Ft. (7.6m)
of rise on Hot
Gas Line only

Evaporator Coil
Liquid Return
from Condenser
Expansion Valve
Hot Gas
Bypass
Valve

Solenoid Valves
Sensing Bulb
Shutoff
Valve *

Sight Glass

Filter Drier
Liquid Return
Service
Valves
Hot Gas
Bypass

External Equalizers

Scroll Compressor

SINGLE CIRCUIT SHOWN
Check Valve * *

FACTORY PIPING
OPTIONAL PIPING

Hot Gas Discharge

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

SL-10061 PG 4 SL-10071 PG 4
23

Water-Cooled Models

4.0

WATER-COOLED MODELS

4.1

Piping Considerations
Manual shut-off valves should be installed at the supply and return lines of each unit. This will provide for routine maintenance or emergency isolation of the unit.
When the water source for the condenser is of poor quality, it is good practice to provide cleanable filters in the supply line. These filters will trap the particles in the water supply and extend the service
life of the water-cooled condenser.
To provide for the emergency of water leaks and the consequences of sub-floor flooding, floor drains
should be provided with wet traps or a water detection system such as a Liqui-tect sensor that is
installed near the base of the unit or below the elevated floor.

4.2

Condenser
The condenser is designed to operate in conjunction with either a cooling tower or city water. The
maximum water pressure is 150 psig (1034 kPa). A high pressure system rated at 350 psig (2413 kPa)
is available as an option.

24

Water-Cooled Models

Figure 12 Water-cooled general arrangement
Evaporator
Coil

Expansion
Valve
Sensing
Bulb
Sight
Glass

Hot Gas
Bypass
Valve

Filter
Drier
Hot Gas
Bypass
Solenoid
Valve

External
Equalizers
Scroll
Compressor

Service
Valves

Hot Gas
Bypass

Fluid
Supply
To
Unit

Fluid
Return
From
Unit

Tube
in Tube
Condenser

Bypass
Valve

Tube
in Tube
Condenser

Shutoff*
Valves
2-Way Water
Regulating
Valve
3-Way Water
Regulating Valve
(optional)

Hose Bibs*

Fluid
Supply
To
Unit

Fluid
Return
From
Unit

FACTORY
PIPING
FIELD
PIPING

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

25

SL-11898 PG 5

Water-Cooled Models

4.3

Water Regulating Valve
The water regulating valve automatically regulates the amount of fluid necessary to remove the heat
from the refrigeration system, permitting more fluid to flow when load conditions are high and less
fluid to flow when load conditions are low. The valve consists of a brass body, balance spring, valve
seat, valve disc holders, capillary tube to discharge pressure, and adjusting screw.

4.3.1

Water Regulating Valve Adjustment
The Liebert Challenger ITR may be equipped with either a standard Johnson Controls valve, 150 psig
(1034 kPa) or with a high-pressure Johnson Controls valve, 350 psig (2413 kPa).
The valve may be adjusted with a standard refrigeration service valve wrench or screw driver.
To lower the head pressure setting, turn the square adjusting screw clockwise until the high pressure
gauge indicates the desired setting.
To raise the head pressure setting, turn the adjusting screw counterclockwise until the desired setting is obtained.

Figure 13 Johnson Controls valve adjustment
Range
spring
Valve spring
guide
Range adjustment screw
Top
retainer
Insert screwdrivers underneath
the valve spring guide

4.3.2

Water Regulating Valve Manual Flushing
The valve may be flushed by inserting screwdrivers or similar tools under the opposing sides of the
main spring and lifting. This action will open the valve seat and flush any dirt particles from the seat.
If this fails, the valve must be disassembled for cleaning the seat.

4.3.3

Testing Valve Function
When the refrigeration system has been off for 10-15 minutes, the water flow should stop.
Should the water continue to flow, the valve is either improperly adjusted or the pressure sensing
capillary is not properly connected to the condenser.
26

Glycol/GLYCOOL-Cooled Models

5.0

GLYCOL/GLYCOOL-COOLED MODELS

5.1

Drycooler Location
The drycooler should be located for maximum security and maintenance accessibility. Avoid groundlevel sites with public access or areas which contribute to heavy snow or ice accumulations. To assure
adequate air supply, it is recommended that drycoolers be located in a clean air area, away from loose
dirt and foreign matter that may clog the coil. In addition, drycoolers should not be located in the
vicinity of steam, hot air or fume exhausts. Also, drycoolers should not be located closer than 3 feet
(1 meter) from a wall, obstruction or adjacent unit.

5.2

Drycooler Installation
For roof installation, mount drycoolers on steel supports in accordance with local codes. To minimize
sound and vibration transmission, mount steel supports across load bearing walls. For ground installation, a concrete pad will provide adequate support. Drycooler legs have mounting holes for securing
the drycooler to steel supports or concrete pad.

5.3

Electrical Connections
Refer to equipment nameplate regarding wire size and circuit protection requirements. Refer to electrical schematic when making connections. Make all wiring and electrical connections in accordance
with local and national codes.

! WARNING
Risk of electric shock. Can cause injury or death.
Disconnect all local and remote electric power before working within the unit. Use a voltmeter
to make sure power is turned off before making any electrical connections.

5.3.1

Line Voltage
Line voltage electrical service is required for all drycoolers at the location of the drycooler. This power
supply does not have to be the same voltage as the indoor unit. This separate power source may be
208, 230, 460, or 575 V, 60 Hz; or 200, 230, or 380/415 V, 50 Hz. The disconnect switch is factory-supplied and mounted in the electric panel.

5.3.2

Low Voltage
A control interlock between the drycooler and the indoor unit is required and is connected between 70
and 71 in the handy box of the indoor unit and the pump and drycooler control box of the drycooler.
NEC Class 1 wiring is required.

5.3.3

Pump and Drycooler
All wiring to the pump and drycooler from the control box should be done in accordance with the electrical schematic on the inside lid of the drycooler control box and with local and national codes.

27

Glycol/GLYCOOL-Cooled Models

5.4

Glycol Piping

NOTICE
Galvanized pipe must not be used in or with systems or units that contain glycol. The
phosphates in the inhibitor can react with the zinc in the galvanized pipe, precipitating an
insoluble material that can eventually foul the system.
To help prevent piping failures, supply and return lines must be supported in a way that
keeps their weight from bearing on the piping of the unit, drycooler or pumps.
To avoid the possibility of burst pipes, it is necessary to install a relief valve in the system.
This valve may be obtained from the supplier as an option or obtained from another vendor.
Fluid-cooled condensers have small internal flow passages. To avoid clogging and other
resulting system operation problems, install a 16-20 mesh filter in the fluid supply line to the
indoor unit. The filter should be located where it can be easily serviced or replaced.
Do not install unit on open-loop systems. Debris carried by the fluid will clog the brazed plate
condenser.
It is recommended that manual service shut-off valves be installed at the supply and return connections to each unit. This enables routine service and/or emergency isolation of the unit. In addition,
multiple pump packages require a check valve at the discharge of each pump to prevent back flow
through the standby pump(s).
To facilitate filling, installation of hose bibs at the lowest point of the system is recommended.
Consideration of the minimum glycol temperature to be supplied from the drycooler will determine if
the need exists to insulate the glycol supply and return lines. Insulation will prevent condensation on
the glycol lines in low ambient conditions.
All fluid piping must comply with local codes. Care in sizing pipes will help reduce pumping power
and operating costs.
Table 11

Room dew point temperatures

Dry Bulb
°F (°C)

Wet Bulb
°F (°C)

Relative
Humidity

Dew Point*
°F (°C)

70 (21.1)
70 (21.1)

57.2 (14.0)
58.5 (14.7)

45
50

48.0 (8.9)
50.5 (10.3)

72 (22.2)
72 (22.2)

58.9 (24.9)
60.0 (15.5)

45
50

50.0 (10.0)
52.4 (11.3)

75 (23.8)
75 (23.8)

61.2 (16.2)
62.5 (16.9)

45
50

52.4 (11.3)
55.0 (12.7)

* Minimum glycol temperature before condensation will occur.

5.4.1

Expansion Tanks, Fluid Relief Valves and Other Devices
An expansion tank must be provided for expansion and contraction of the fluid due to temperature
change in this closed system. Vents are required at system high points to vent trapped air when filling the system. A relief valve is a also a necessary piping component.
Depending on the complexity of the system, various other devices may be specified. Pressure gauges,
flow switches, automatic air separator, tempering valves, standby pumps, sensors for electrical controls, and flow switches are just a few of these devices.

NOTICE
Immediately following the use of water for leak testing or system cleaning, charge the tested
system with the proper percentage of glycol and water for the application’s coldest design
ambient. Complete system drain-down cannot be assured, and equipment damage could
result from freezing of residual water.

28

Glycol/GLYCOOL-Cooled Models

5.5

Filling Instructions

5.5.1

Preparing the System for Filling
It is important to remove any dirt, oil or metal filings that may contaminate the cooling system piping
in order to prevent contamination of the fresh glycol solution and fouling of the drycooler piping. The
system should be flushed thoroughly using a mild cleaning solution or high-quality water and then
completely drained before charging with glycol. Cleaning new systems is just as important as cleaning old ones. New systems can be coated with oil or a protective film; dirt and scale are also common.
Any residual contaminants could adversely affect the heat transfer stability and performance of your
system. In many cases, in both old and new systems, special cleaners are needed to remove scale, rust
and hydrocarbon foulants from pipes, manifolds and passages. Clean heat transfer surfaces are
important in maintaining the integrity of the heating/cooling system. For more information on cleaners and degreasers, contact your sales representative. Follow the manufacturer's instructions when
using these products.
Calculate the internal volume of the system as closely as possible. See Table 12 and Table 14 for
unit volumes. Use volume in Table 13 for glycol piping volumes.
Table 12

Indoor unit glycol volume approximate gallons (liters) max.

Model (50 Hz)

Glycol-Cooled

GLYCOOL

071WG/(070WG)

2.0 (7.5)

—

—

4.0 (15.1)

061G/(058G)

Table 13

Volume in standard Type “L” copper piping

Diameter (in.)

Volume

Outside

Inside

Gal/Ft L/M

1/2

0.123

0.008 (0.01)

5/8

0.555

0.012 (0.15)

3/4

0.666

0.018 (0.22)

7/8

0.785

0.025 (0.31)

1-1/8

1.025

0.043 (0.53)

29

Glycol/GLYCOOL-Cooled Models

5.5.2

Glycol Solutions
NOTE
Glycol solutions should be considered for protection of the coil. When it is not used, damage can
occur from either freezing or corrosion from water.
When considering the use of any glycol products in a particular application, you should review the latest Material Safety Data Sheets and ensure that the use you intend can be accomplished safely. For
Material Safety Data Sheets and other product safety information, contact the supplier nearest you.
Before handling any other products mentioned in the text, you should obtain available product safety
information and take necessary steps to ensure safety of use.

NOTICE
When mishandled, glycol products pose a threat to the environment. Before using any glycol
products, review the latest Material Safety Data Sheets and ensure that you can use the
product safely.
Glycol manufacturers request that the customer read, understand and comply with the
information on the product packaging and in the current Material Safety Data Sheets. Make
this information available to anyone responsible for operation, maintenance and repair of the
drycooler and related equipment.
No chemical should be used as or in a food, drug, medical device, or cosmetic, or in a product or process in which it may contact a food, drug, medical device, or cosmetic until the user has determined
the suitability and legality of the use. Since government regulations and use conditions are subject to
change, it is the user's responsibility to determine that this information is appropriate and suitable
under current, applicable laws and regulations.

NOTICE
Automotive antifreeze is unacceptable and must NOT be used.
Typical inhibited formula ethylene glycol and propylene glycol manufacturers and suppliers are
Union Carbide (Ucartherm) or Dow Chemical (Dowtherm SR-1, Dowfrost). These glycols are supplied
with corrosion inhibitors and do not contain a silicone anti-leak formula. Commercial ethylene glycol,
when pure, is generally less corrosive to the common metals of construction than water itself. Aqueous solutions of these glycols, however, assume the corrosivity of the water from which they are prepared and may become increasingly corrosive with use if not properly inhibited.
There are two basic types of additives: corrosion inhibitors and environmental stabilizers. The corrosion inhibitors function by forming a surface barrier that protects the metals from attack. Environmental stabilizers, while not corrosion inhibitors in the strictest sense of the word, decrease corrosion
by stabilizing or favorably altering the overall environment. An alkaline buffer such as borax is a simple example of an environmental stabilizer since its prime purpose is to maintain an alkaline condition (pH above 7).
The percentage of glycol to water must be determined by using the lowest design outdoor temperature
in which the system is operating. Table 14 indicates the solution freeze point at several concentration levels of ethylene glycol. Propylene glycol concentrations should be 1% higher than the ethylene
glycol table values to find the freeze point. For example, 41% propylene glycol freezes at -10°F (-23°C).
Table 14

Ethylene glycol concentrations

% Glycol by Volume
Freezing Point °F (°C)
Apparent Specific Gravity
@ 50°F (10°C)

0*
32 (0)

10
25 (-3.9)

20
16 (-8.9)

30
5 (-15.0)

40
-10 (-23.3)

50
-32 (-35.5)

1

1.014

1.028

1.042

1.057

1.071

* A minimal amount of glycol should be considered for inhibitive coil protection.

NOTICE
The quality of water used for dilution must be considered because water may contain corrosive
elements that reduce the effectiveness of the inhibited formulation. Water classified as soft
(low in chloride and sulfate ion content less than 100 parts per million each) should be used.

30

Glycol/GLYCOOL-Cooled Models

5.5.3

Filling the System
Installation of hose bibs at the lowest point of the system is recommended. When filling a glycol system keep air to a minimum. Air in glycol turns to foam and is difficult and time-consuming to remove.
(Anti-foam additives are available and may be considered.) Open all operating systems to the loop.
With the top vent(s) open, fill the system from the bottom of the loop. This will allow the glycol to
push the air out of the top of the system, minimizing trapped air. Fill to approximately 80% of calculated capacity. Fill slowly from this point, checking fluid levels until full.
NOTE
For glycol solution preparation and periodic testing, follow manufacturer's recommendations.
Do not mix products of different manufacturers.

31

Glycol/GLYCOOL-Cooled Models

Figure 14 Drycoolers and pump packages
43-9/16"
(1105mm)

DRYCOOLER
A

GLYCOL PUMP PACKAGE
See Note 1

30-1/4"
(768mm)

37-7/8"
(1095mm)
19"
(483mm)

B

43-3/16"
(1097mm)

See Table 16 for keys to
dimensions “A”, “B” and “C”.

PUMP PACKAGE
MOUNTING ANGLES

Provided on
dual pump
package only

1/2" diameter holes
for mounting (4 typ)

Note: Angles located
inside, bottom of pump
package. View used for
mounting reference.
3/4"
(19mm)

C

Notes

1. Single pump packages are 17-1/4"
(438 mm) wide. Dual pump packages are
32-1/4" (819 mm) wide.
2. Mounting holes are 15-1/4" (387 mm)
apart on single pump packages and 301/4" (768 mm) apart on dual pump
packages.
3. Connection sizes apply to primary pump
supplier.

A
B

1-3/4"
(25.4mm)

See Table 15 for keys to
dimensions “A”, “B” and “C”.

For expansion tank dimensions,
see Figure 15 on page -33.

4-1/4"
(25.4mm)

1"
(25.4mm)

B
1-3/4"
(25.4mm)

4-1/4"
(25.4mm)

C

1"
(25.4mm)

37-11/16"
(957mm)

TYPICAL
FOOTPRINT

32

1/2" (12.7mm) diameter
anchor bolts (typ)

UNIT ANCHOR PLAN

Glycol/GLYCOOL-Cooled Models

Figure 15 Pump packages—expansion tank
30-1/2"
(774.7mm)

O 9"
(228.6mm)

6-13/16"
(173mm)

1/2" FPT
Fitting

1/2" FPT
Fitting

2-3/4"
(69.9mm)

17-1/4"
(438.2mm)

2-1/2"
7"
(63.5mm) (177.8mm)

1-1/2"
(38.1mm)

Table 15

4"
(101.6mm)

1" (25.4mm)

1" (25.4mm)

O 1/2 " (12.7mm) (8) Holes
8.8 Gallon Expansion Tank
(33.3 Liter)

1-1/2"
(38.1mm)
3"
(76.2mm)

6-1/8"
(155.6mm)

SL-10065 PG 7B SL-10070 PG 6B

Mounting hole dimensional data

PUMP PACKAGE

A
in (mm)

B
in (mm)

C
in (mm)

SINGLE (0.75 - 7.5 hp)

15-1/4 (387.4)

2-1/2 (63.5)

22-1/2 (571.5)

DUAL (0.75 - 5 hp)

30-1/4 (768.4)

2-1/2 (63.5)

22-1/2 (571.5)

DUAL (7.5 hp)

39-5/16 (998.5)

1-3/4 (44.5)

26-7/8 (682.6)

Table 16

Drycooler data

Model
No.

No. of
Fans

Weight
lb (kg)

Drycooler
Conn. Sizes
(Suct. & Disc.) in.

“A” Dimension
in. (mm)

“B” Dimension
in. (mm)

“C” Dimension
in. (mm)

-069

1

410 (186)

1-1/4

51-1/2 (1308)

44 (1118)

42 (1067)

2.4 (9.2)

-092

1

430 (195)

1-1/2

51-1/2 (1308)

44 (1118)

42 (1067)

3.7 (13.9)

-109

1

450 (204)

2

51-1/2 (1308)

44 (1118)

42 (1067)

4.9 (18.6)

-112

1

470 (213)

2

51-1/2 (1308)

44 (1118)

42 (1067)

5.8 (22.0)

-139

2

565 (256)

2

91-1/2 (2324)

84 (2134)

82 (2083)

4.8 (18.2)

-197

2

605 (274)

2

91-1/2 (2324)

84 (2134)

82 (2083)

9.0 (34.1)

Table 17

Glycol pump data*

Pump
Hp

Hz

Pump Suction
Connection in.

Pump Discharge
Connection in.

1-1/2
2
3
5

60
60
60
60

1-1/4
1-1/4
1-1/2
1-1/2

3/4
3/4
1
1-1/4

1
1-1/2
2
3

50
50
50
50

1-1/4
1-1/4
1-1/4
1-1/2

3/4
3/4
3/4
1-1/4

* Connection sizes apply to primary pump supplier

33

Coil Internal
Volume, gal. (l)

Glycol/GLYCOOL-Cooled Models

Figure 16 Glycol general arrangement
Expansion Tank Field Installed at
Highest Point in System.
Fill *

Drycooler
Electric
Box

Expansion
Port*

Hose
Bibs*
Pressure
Port*

Glyco l
Pump
Pump
Housing

Drycooler
Coil

Fluid
Return
to Pump
Fluid
Supply
from
Pump

Unions*

Air Vents*
at Top of
Risers

Unions*

Flow Regulating
Valve*

Evaporator
Coil

Isolation
Valves*
Expansion
Valve

Sensing
Bulb
Sight
Glass

Hot Gas
Bypass
Valve

Filter
Drier
Hot Gas
Bypass
Solenoid
Valve

External
Equalizers

Scroll
Compressor

Service
Valves

Hot Gas
Bypass

Fluid
Supply
to Unit
Fluid
Return
from
Unit

Tube
in Tube
Condenser

Bypass
Valve

Isolation
Valves*
2-Way Water
Regulating
Valve

3-Way Water
Regulating Valve
(optional)

Hose
Bibs*

Hose
Bibs*

Tube
in Tube
Condenser

Fluid
Supply
to Unit
FACTORY
PIPING
FIELD
PIPING
*Components are not supplied by Liebert but
are recommended for proper circuit operation
and maintenance.

34

Fluid
Return
From
Unit

SL-11898 PG 6

Glycol/GLYCOOL-Cooled Models

Figure 17 GLYCOOL general arrangement
Expansion Tank Field Installed at
Highest Point in System
Fill *

Drycooler
Electric
Box

Unions*
Drycooler
Coil
Fluid
Return to
Pump

Pressure
Port*
Unions*

Air Vents*
at Top of
Risers

Hose
Bib*
Pressure
Port*

Glyco l
Pump

Evaporator
Coil

Isolation
Valves*
Expansion
Valve

Fluid
Supply
from
Pump

Flow Regulating
Valve*

Pump
Housing

Sensing
Bulb

Sight
Glass

Hot Gas
External
Bypass
Scroll Equalizers
Valve
Compressor

Filter
Drier
Hot Gas
Bypass
Solenoid
Valve

Service
Valves

Hot Gas
Bypass
Econ-O-Coil

Fluid
Return
from
Unit

Fluid
Supply to
Unit

Valve
Actuator

3-Way Water
Regulating
Valve

Tube
in Tube
Condenser

Econ-O-Cycle
Comparator
Isolation
Valves*

3-Way Chilled
Glyco l Valve

Econ-O-Coil
Circuit

Hose
Bibs*

FACTORY PIPING
FIELD PIPING
*Components are not supplied by Liebert but
are recommended for proper circuit operation and maintenance.

35

SL-11901 PG 5

Glycol/GLYCOOL-Cooled Models

5.6

Condenser
The condenser is designed to operate in conjunction with a drycooler. The maximum coolant pressure
is 350 psig (2413 kPa).
NOTE
For pressures above 150 psig (1034 kPa), the high pressure option for high pressure valve(s)
is required.

5.7

Glycol Regulating Valve
The glycol regulating valve automatically regulates the amount of coolant necessary to remove the
heat from the refrigeration system, permitting more fluid to flow when load conditions are high and
less fluid to flow when load conditions are low. The valve consists of a brass body, balance spring,
valve seat, valve disc holders, capillary tube to discharge pressure, and adjusting screw.

5.7.1

Glycol Regulating Valve Adjustment
The Liebert Challenger ITR may be equipped with either a standard Johnson Controls valve, 150 psig
(1034 kPa) or with a high-pressure Johnson Controls valve, 350 psig (2413 kPa). For details on adjusting the valve, refer to 4.3.1 - Water Regulating Valve Adjustment.

5.7.2

Testing Valve Function
When the refrigeration system has been off for approximately 10-15 minutes, the coolant flow should
stop.
Should the coolant continue to flow, the valve is either improperly adjusted or the pressure sensing
capillary is not connected properly to the condenser.
Table 18

Refrigerant control settings psi (kPa)

Low Pressure
Cut Out

Low Pressure
Cut In

High Pressure
Cut Out

20 (137.9)

65 (448.2)

360 (2482)

36

Chilled Water Models

6.0

CHILLED WATER MODELS

6.1

Piping Considerations
Manual shut-off valves should be installed at the supply and return lines to each unit. This will provide for routine service and emergency isolation of the unit.
Consideration of the minimum water temperature to be supplied from the chiller will determine if the
need exists to insulate supply and return lines. Insulation will prevent condensation on the supply
and return lines.
To provide for the emergency of water leaks and the consequences of sub-floor flooding, floor drains
should be provided with wet traps or a water detection system, such as a Liqui-tect, that is installed
near the base of the unit or below the elevated floor.

Figure 18 Chilled water general arrangement - horizontal flow (BR)
Air
Flow
Bleed
Valve
Chilled
Water
Supply
Chilled
Water
Return

Chilled
Water
Coil

Valve
Actuator

3-WAY VALVE
A

3-Way
Chilled
Water
B Valve

Shutoff
Valves*

AB

Flow
Switch
(optional)
Hose
Bibs*

Chilled
Water
Return

Air
Flow
Bleed
Valve

Valve
Actuator

Chilled
Water
Supply
2-Way
Chilled
Water
Valve

Chilled
Water
Coil

2-WAY VALVE

Shutoff
Valves*
SINGLE CIRCUIT SHOWN
FACTORY PIPING
FIELD PIPING
Hose
Bibs*

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

37

SL-11899
Pg. 5

Split System Models

7.0

SPLIT SYSTEM MODELS
Three (3) condensing unit styles are available: two (2) air-cooled and one (1) water/glycol-cooled condensing unit.

7.1

Location Considerations

7.1.1

Air-Cooled Condensing Units
To assure an adequate air supply, it is recommended that all condensing units be located in a clean
air area, away from loose dirt and foreign matter that may clog the coil.
Condensing units must not be located in the vicinity of steam, hot air, or fume exhausts or closer than
18" from a wall, obstruction, or adjacent unit.
The outdoor condensing unit should be located for maximum security and maintenance accessibility.
Avoid ground-level sites with public access or areas that will contribute to heavy snow accumulations.
Do not allow the discharge air to blow into another condensing unit.
A solid base, capable of supporting the weight of the condenser and at least 2" (51 mm) higher than
the surrounding grade and at least 2" (51 mm) larger than the condensing unit base dimensions,
should be installed at the pre-determined location. In snow areas, a base of sufficient height to clear
snow accumulation must be installed.
The centrifugal fan air-cooled condensing unit may be located above the dropped ceiling or any remote
indoor area. If noise is of concern, the condensing unit should be located away from personnel. Normal
operating sound may be objectionable if the condensing unit is placed near quiet work areas.
To mount the unit in the ceiling, refer to 7.5.1 - Installing the Indoor Condensing Unit for hanging guidelines and to Figure 23 - Detail of ceiling hanging bracket for dimensional data.

7.1.2

Water/Glycol-Cooled Condensing Units
The condensing unit may be located above the dropped ceiling or any remote indoor area. If noise is of
concern, the condensing unit should be located away from personnel. Normal operating sound may be
objectionable if the condensing unit is placed near quiet work areas. To mount the unit the in ceiling,
refer to 7.5.1 - Installing the Indoor Condensing Unit.

7.2

Electrical Connections
Refer to equipment nameplate regarding wire size and circuit protection requirements. Refer to electrical schematic when making connections. Make all wiring and electrical connections in accordance
with local and national codes.

! WARNING
Risk of electric shock. Can cause injury or death.
Disconnect all local and remote electric power before working within the unit. Use a
voltmeter to make sure power is turned off before making any electrical connections.

7.2.1

Line Voltage
Line voltage electrical service is required for all condensing units at the location of the condensing
unit. This power supply does not have to be the same voltage as the indoor unit. This separate power
source may be 208, 230, 460 or 575V, 60 Hz; or 200, 230, or 380/415V, 50 Hz. A disconnect switch is
required and must be mounted per local and national codes to isolate the unit for maintenance.

7.2.2

Low Voltage
The control cable between the condensing unit and the evaporator unit is connected between terminals 1,2 and 3 on the terminal strip in the evaporator unit and the condensing unit control box. A
fourth wire is required on systems with hot gas bypass. NEC Class 1 wiring is required. Glycol-cooled
units also require a two-wire control connection to the drycooler and pump package.

38

Split System Models

7.3

Piping Considerations

7.3.1

Refrigerant Loop

! CAUTION
All local codes for handling refrigerant must be followed.
NOTE
As R22 and R407C are similar in properties, proper safety equipment and proper refrigeration
tools are required on both types. Check unit nameplate for correct refrigerant type before
topping off or recharging a system.
NOTE
Refrigerant R407C uses a POE (polyol ester) lubricant. The R407C refrigerant must be
introduced and charged from the cylinder only as a liquid.
NOTE
When installing field piping, care must be taken to protect all refrigerant lines from the
atmosphere, especially when using refrigerants with POE oils. Do not allow the piping to stand
open to air for more than 15 minutes. Units designed for R407C have a compressor which
contains POE oil that is very hygroscopic; that is, it quickly absorbs water from the air. The
longer the compressor piping is left open to air, the harder it will be to fully evacuate. If left
open too long, the POE oil may need to be replaced before achieving the required vacuum level.
NOTE
Complete all piping and evacuate lines before connecting quick connects when using an
optional sweat adapter kit and field installed hard piping.
Follow all proper brazing practices including a dry nitrogen purge to maintain system
cleanliness.
All split systems require two refrigerant lines (an insulated copper suction line and a copper liquid
line) between the evaporator and the condensing unit.
Two possible methods exist for installing the copper suction and liquid lines.
1. Using an optional Sweat Adapter Kit and hard piping between the two units.
2. Using optional pre-charged line sets.
All refrigeration piping should be installed with high temperature brazed joints. Prevailing good
refrigeration practices should be employed for piping supports, leak testing, evacuation, dehydration,
and charging of the refrigeration circuits. The refrigeration piping should be isolated from the building by the use of vibration isolating supports.
It is important to handle the pre-charged lines with care so they will not get kinked or damaged. Use
tube benders and make all bends before making connections to either end. Coil any excess tubing in a
horizontal plane with the slope of the tubing toward the condensing unit.
To prevent tube damage when sealing openings in walls and to reduce vibration transmission, use a
soft flexible material to pack around the tubes.
When installing remote condensing units mounted above the evaporator, the suction gas line should
be trapped at the evaporator. This trap will retain refrigerant oil in the off cycle. When the unit
starts, oil in the trap is carried up the vertical riser and returns to the compressor.
Refrigerant charge requirements: Total refrigerant charge will be required only if units are evacuated
during installation or maintenance. Total refrigerant charge = evaporator + lines + condensing unit.
NOTE
All condensing units and 3-ton evaporator units are fully charged with refrigerant. All
23 and 33 kW evaporator units include a nitrogen holding charge only. See Table 19 for field
charge required. If field-supplied refrigerant piping is installed, refrigerant must be added to
the system.
39

Split System Models

Once all piping is complete, check for leaks and dehydrate the field piping as follows:
1. Pressurize the field piping to 150 PSIG (1034 kPa) using dry nitrogen with a trace of refrigerant.
Check system for leaks with a suitable leak detector.
2. After completion of leak testing, release the test pressure (per local code) and pull a deep vacuum
on the field piping with a suitable pump.
3. After 15 minutes, check the pressure readings and, if they have not changed, break vacuum with
dry nitrogen. Pull a second vacuum to 250 microns or less. Recheck the pressure after 15 minutes.
Table 19

Unit refrigerant charge
R22 Charge

R407C Charge

R22 Charge

R407C Charge

Model

lb (kg)

lb (kg)

Model

lb (kg)

lb (kg)

060E

0.81 (0.37)

0.8 (0.4)

PF_Z67A-_L

51.69 (23.45)

50.1 (22.7)

059E

0.81 (0.37)

0.8 (0.4)

PF_Z66A-_L

51.69 (23.45)

50.1 (22.7)

MC_65/64A

27.00 (12.25)

26.1 (11.8)

PF_067A-_H

51.69 (23.45)

50.1 (22.7)

PF_067A-_L

26.63 (12.08)

25.8 (11.7)

PF_066A-_H

51.69 (23.45)

50.1 (22.7)

PF_066A-_L

26.63 (12.08)

25.8 (11.7)

MC_69/68W

5.88 (2.67)

n/a

Table 20

Line charges - refrigerant per 100 ft (30 m) of Type “L” copper tube
R22

R407C

O.D.

Liquid Line
lb (kg)

Suction Line
lb (kg)

Liquid Line
lb (kg)

Suction Line
lb (kg)

1/2"

7.3 (3.3)

0.2 (0.1)

6.9 (2.9)

-

5/8"

11.7 (5.3)

0.3 (0.2)

11.0 (4.6)

0.4 (0.2)

7/8"

24.4 (11.1)

0.7 (0.3)

23.0 (9.6)

1.0 (0.4)

1-1/8"

41.6 (18.9)

1.2 (0.6)

39.3 (16.3)

1.7 (0.7)

1-3/8"

63.3 (28.7)

1.9 (0.8)

59.8 (24.8)

2.7 (1.1)

Table 21

Recommended refrigerant lines (R22 or R407C) sizes OD copper
3.5 Tons
036E (035E)

23 & 33 kW
060E (059E)

Equivalent Feet (m)

Suction

Liquid

Suction

Liquid

0-50 (0-15)

7/8"

1/2"

1-1/8"

1/2"

51-100 (16-30)

1-1/8"

1/2"

1-1/8"

5/8"

101-150 (31-45)

1-1/8"

5/8"

1-3/8"

5/8"

Table 22

Line coupling sizes

Line Size
OD Cu, in.
1/2 & 5/8
1-1/8

Coupling
Size
#10
#12

Torque
lb-ft.
35-45
50-65

40

Split System Models

Table 23

Equivalent lengths (feet) for various pipe fittings

Copper Pipe
OD in.

90 Degree
Elbow Copper

90 Degree
Elbow Cast

45 Degree
Elbow

Tee

Gate
Valve

Globe
Valve

Angle
Valve

1/2

0.8

1.3

0.4

2.5

0.26

7.0

4.0

5/8

0.9

1.4

0.5

2.5

0.28

9.5

5.0

3/4

1.0

1.5

0.6

2.5

0.3

12.0

6.5

7/8

1.45

1.8

0.8

3.6

0.36

17.2

9.5

1-1/8

1.85

2.2

1.0

4.6

0.48

22.5

12.0

1-3/8

2.4

2.9

1.3

6.4

0.65

32.0

16.0

1-5/8

2.9

3.5

1.6

7.2

0.72

36.0

19.5

Refrigerant trap = 4 times equivalent length of pipe per this table

Figure 19 Refrigerant piping diagram

Evaporator

Pitch down 1/2" (13mm) per 10 ft. (3m)

NOTE
When remote condensing units are installed below the
evaporator, the suction gas line should be trapped with
an inverted trap to the height of the evaporator. This
prevents refrigerant migration to the compressors
during off cycles. Maximum recommended vertical drop
to condensing unit is 15 ft. (4.6m).

Suction Line Piping
Condensing unit
below evaporator

Condensing
Unit

Evaporator

Condensing
Unit
Suction Line Piping
Condensing unit above evaporator .
Traps recommended at the base of riser and
every 25 feet (7.6m) of vertical rise.

41

Split System Models

7.3.2

Quick Connect Fittings
NOTE
When hard piping is used, complete all piping and evacuate lines before
connecting quick connects.
Be especially careful when connecting the quick connect fittings. Read through the following steps
before making the connections.
1.
2.
3.
4.
5.

Remove protector caps and plugs.
Carefully wipe coupling seats and threaded surfaces with a clean cloth.
Lubricate the male diaphragm and synthetic rubber seal with refrigerant oil.
Thread the coupling halves together by hand to ensure that the threads mate properly.
Tighten the coupling body hex nut and union nut with the proper sized wrench until the coupling
bodies “bottom out” or until a definite resistance is felt.
6. Using a marker or pen, make a line lengthwise from the coupling union nut to the bulkhead.
7. Tighten the nuts an additional quarter turn; the misalignment of the lines shows how much the
coupling has been tightened. This final quarter turn is necessary to ensure that the joint will not
leak. Refer to Table 22 for torque requirements.
8. Add charge for the additional piping (refer to Table 20).

42

Split System Models

7.4

Outdoor Air-Cooled Condensing Units

Figure 20 Outdoor air-cooled condensing unit—horizontal air discharge models
UNIT DIMENSIONS
(See Table 24)

C
REMOVABLE (R IGHT) PANEL
FOR ACCESS TO
REFRIGERATION COMPONENT.

Fan Rotation
CCW
(left side)

A
RIGHT
AIR
DISCHARGE
LEFT
AIR
INTAKE

B
C

SHADED AREA
INDICATES A MINIMUM
CLEARANCE OF 18" (457mm)
FOR PROPER AIR FLOW

C

SHADED AREA
INDICATES A MINIMUM
CLEARANCE OF 18" (457mm)
FOR PROPER AIR FLOW.

REMOVABLE (FRONT) PANEL FOR
ACCESS TO HIGH VOLTAGE &
LOW VOLTAGE CONNECTIONS,
AND REFRIGERATION COMPONENTS.

Liquid Line
Quick Connect
(Male Coupling .

G

A

SHADED AREA
INDICATES A RECOMMENDED
CLEARANCE OF 24" (610mm)
FOR COMPONENT ACCESS
AND REMOVAL.
SL-11081 PG 4

Suction Line
Quick Connect
(Male Coupling).
Except as noted

F

Electrical Entrance for
High Voltage
Connection
B

C

Electrical Entrance for
Low Voltage Connection

D
E

43

SL-11081 PG 6

Split System Models

Table 24

Horizontal air discharge cabinet and floor planning dimensional data

Model Numbers
60 Hz

50 Hz

PFC067A-_L

PFC066A-_L

PFH067A-_L

Table 25

Dimensional Data in. (mm)
A

B

C

Module
Weight
lb (kg) net

53 (1343)

36-1/4 (918)

18 (457)

351 (159)

Horizontal air discharge piping and electrical connection data

Model Numbers
60 Hz

50 Hz

PFC067A-_L

PFC066A-_L

PFH067A-_L

Dimensional Data in. (mm)

Piping Connections in. (mm)

A

B

C

D

E

F

G

2 (51)

6 (152)

8-1/2 (216)

4-3/4 (121)

7-3/4 (197)

-

8-1/2 (216)

44

Split System Models

Figure 21 Outdoor air-cooled condensing unit—top air discharge models
GUARD
HEIGHT

TOP
AIR
DISCHARGE

D

RIGHT
AIR
INTAKE

UNIT DIMENSIONS
(see Table 26)
B
LEFT
AIR
INTAKE

SHADED AREA
INDICATES A RECOMMENDED
CLEARANCE OF 18" (457mm)
FOR PROPER AIR FLOW

2 "
(51mm)

A
SHADED AREA
INDICATES A RECOMMENDED
CLEARANCE OF 18" (457mm)
FOR PROPER AIR FLOW

C

SHADED AREA
INDICATES A RECOMMENDED
CLEARANCE OF 24" (610mm)
FOR COMPONENT ACCESS
AND REMOVAL.

REMOVABLE FRONT PANEL FOR
ACCESS TO HIGH VOLTAGE &
LOW VOTLAGE CONNECTIONS,
AND REFRIGERATION COMPONENTS.
36 1/8 "
(918mm)

4 " TYP.
(102mm)

FOOTPRINT
DIMENSIONS

53 3/16 "
(1351mm)

2 " TYP.
(51mm)

1/2" Bolt-Down Holes
(6 places)

4 23/32 "
(120mm)
25 3/32 "
(637mm)

32 1/8 "
(816mm)

2 "
(51mm)

46 7/32 "
(1174mm)

2 "
(51mm)

SL-11081PG 5

* System 2 (23 & 33kW)

A

G

Electrical Entrance for
High Voltage Connection
PIPING & ELECTRICAL
CONNECTIONS
(see Table 27)

F

B
C

Liquid Line
Quick Connect
(Male Coupling)

D
* System 1 (3 Ton)

* System 1 and System 2 on 8 Ton only.

E

Electrical Entrance
for Low Voltage
Connection
Suction Line
Quick Connect
(Male Coupling) SL-11081 PG 7

45

Split System Models

Table 26

Cabinet and floor planning dimensional data - prop fan condensing modules, top air discharge

Model Numbers
60 Hz

50 Hz

PFC067A-_H

PFC066A-_H

PFH067A-_H
PFCZ67A-_L

Table 27

Dimensional Data, in. (mm)
A

B

C

D

Module
Weight
lb (kg) net

53 (1343)

36-1/4 (918)

38-1/2 (978)

5-1/2 (140)

488 (222)

PFCZ66A-_L

Piping and electrical connections - top air discharge

Model Numbers
60 Hz

50 Hz

PFC067A-_H

PFC066A-_H

PFH067A-_H
PFCZ67A-_L

Dimensional Data in. (mm)

Piping Connections, in. (mm)

A

B

C

D

E

F

2 (51)

6 (152)

8-1/2 (216)

4-3/4 (121)

7-3/4 (197)

8-1/2 (216)

PFCZ66A-_L

46

Split System Models

Figure 22 Electrical field connections, prop fan condensing module

Field-supplied unit
disconnect switch

TOP AIR
DISCHARGE MODELS
(23 & 33kW High Ambient
and 23 & 33kW Quiet-Line)

HORIZONTAL AIR DISCHARGE MODELS
Field-supplied 24V NEC
Class 2 wiring to
evaporator module
Single- or
3-phase
electric
service;
not by Liebert

SL-11081 PG 8A
Field-supplied 24V
NEC Class 2 wiring
to evaporator
module

Electric service
connection to contactor
or terminal block

Single- or
3-phase
electric
service; not
by Liebert

Factory-wired
to components on
electric panel.

Single- or 3-phase
electric service; not
by Liebert
High voltage electric
power supply entrance
Low voltage electric
power supply entrance

Earth ground connection
terminal for field wiring.

SL-11081 PG 8

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

47

Heat rejection connection. Fieldsupplied 24V NEC class 2 wiring.
Wire connections from evaporator module:
1. 24V GND
2. 24V Supply
3 High Pressure Alarm
4. Hot Gas Bypass Connection
(only on units with hot gas bypass.
If no hot gas bypass, connection is
provided in the evaporator module.
Connect wire 4 with wire 2 to the
24V supply).

Split System Models

7.5

Centrifugal Air-Cooled Condensing Units

7.5.1

Installing the Indoor Condensing Unit
Refer to drawings for unit dimensions and component locations.

! WARNING
Risk of structure collapse. Can cause equipment damage, injury or death.
Before beginning installation, make sure that the supporting roof structure is capable of
supporting the weight of the unit(s) and the accessories during installation and service. (See
Table 28 - Indoor centrifugal condensing unit.)
Be sure to securely anchor the top ends of the suspension rods. Make sure all nuts are tight.
The indoor condensing unit is usually mounted above the ceiling and must be securely mounted to the
roof structure. The ceiling and ceiling supports of existing buildings may require reinforcements. Be
sure to follow all applicable codes. Use field-supplied threaded suspension rods and
3/8"-16 factory hardware kit.
Recommended clearance between ceiling grids and building structural members is unit height plus
three inches.
Install the four field-supplied rods by suspending them from suitable building structural members.
Locate the rods so that they will align with the four mounting holes in the flanges that are part of the
unit base.
Using a suitable lifting device, raise the unit up and pass the threaded rods through the four mounting holes in the flanges that are part of the unit base.
Attach the threaded rods to the unit flanges using the supplied nuts and grommets. (See Figure 23 Detail of ceiling hanging bracket, Threaded Rod and Hardware Kit Installation). The rubber
grommets provide vibration isolation.
1. Use the plain nuts to hold unit in place. Adjust these nuts so that the weight of the unit is
supported evenly by the four rods, does not rest on the ceiling grid, and is level.
NOTE
The units must be level in order to operate properly.
2. Use the Nylock nuts to “jam” the plain nuts.
Table 28

Indoor centrifugal condensing unit
Model

60 Hz

50 Hz

Net Weight
lb (kg)

MC_65A

MC_64A

449 (204)

MC_69W

MC_68W

282 (128)

48

Split System Models

Figure 23 Detail of ceiling hanging bracket

3/8" threaded rod
(field-supplied)

3/8" hex nut
3/8" washer
Sleeve
Isolator
3/8" fender washer
3/8" hex nut
3/8" hex nut
Nylock

7.5.2

Unit base pan (ref)

Ducting
The total external static pressure for the inlet and outlet ducts, including grille, must not exceed
0.5 inches of H2O. Hood intake dimensions should be the same as the condensing unit duct dimensions.
If the condensing unit is located close to the outside of the building, rain hoods must be installed. In
addition, install a triple layer bird screen over rain hood openings to eliminate the possibility of
insects, birds, water, or debris entering the unit.
Use flexible ductwork or nonflammable cloth collars to attach ductwork to the unit and to control
vibration transmission to the building. Attach the ductwork to the unit using the flanges provided.
Locate the unit and ductwork so that the return air does not short circuit to the supply air inlet.
Avoid directing the hot exhaust air toward adjacent doors or windows.
Normal operating sound may be objectionable if the condensing unit is placed directly over quiet work
areas. Ductwork that runs through a conditioned space or is exposed to areas where condensation
may occur must be insulated. Whenever possible, ductwork should be suspended using flexible hangers. Ductwork should not be fastened directly to the building structure. In applications where the ceiling plenum is used as the heat rejection domain, the discharge air must be directed away from the
condensing unit air inlet and a screen must be added to the end of the discharge duct to protect service personnel.
For multiple unit installations, space the units so that the hot condensing unit exhaust air is not
directed toward the air inlet of an adjacent unit.
Table 29

Airflow CFM (CMH)
23 & 33 kW

60 Hz

3500 (5947)

50 Hz

3500 (5947)

49

Split System Models

Figure 24 Centrifugal air-cooled condensing unit dimensional data

54 "
(1371.6mm)
CABINET
DIMENSION

32 "
(812.8mm)
CABINET
DIMENSION
1 5/8 "
(41.1mm)

15 3/4 "
(400mm)
8 15/16 "
(227mm)

48 "
(1219.2mm)

Customer-supplied
threaded rods for module
support from ceiling
(typ. 4)

3 3/8 "
(85.7mm)

14 1/2 "
(368.3mm)
21 1/4 "
(539.8mm)

24 "
(610mm)
CABINET
DIMENSION

1 3/4 "
(44.5mm)
33 5/8 "
(854.1mm)
THREADED ROD
CENTERS

1/2" (12.7mm) dia. holes for
threaded rods (typ. 2 each end)

51 13/16 "
(1316mm)
THREADED ROD
CENTERS

Shaded area indicates a
recommended clearance of
30" (762mm) for component
Hanger Bracket
access and removal.

NOTE: Unit is spaced evenly in
reference to threaded
rod centers.

7/8" (22.2mm) & 1 1/8" (28.6mm)
dia. knockouts electrical entrance for high
voltage connection (Single Point Power Kit).

7/8" (22.2mm) & 1 1/8" (28.6mm)
dia. knockouts electrical entrance for high
voltage connection.

Single Point Power Kit
connection to Evaporator.
Air Inlet

Air
Outlet

Liquid Line male quick
connect location
Suction Line male quick
conect location.
7/8" (22.2mm) dia. electrical entrance
for low voltage connection.

7/8" (22.2mm) dia. knockout
electrical entrance for altermate
control panel low voltage routing.

SL-11087 PG 4

50

Split System Models

Figure 25 Centrifugal air-cooled condensing unit dimensional data (con't.)
Field-supplied unit disconnect
switch when factory unit
disconnect switch is not supplied.

Electric service
not by Emerson

Optional factory-installed
disconnect switch
AIR COOLED

Connection terminal
for field supplied earth
grounding wire

Line voltage electric power
supply conduit voltage

Removable access panels

Field-supplied 24V NEC
Class 2 wiring
between condensing
unit and fan/coil unit

Low voltage electric power
supply conduit entrance

Heat rejection connection. Field-supplied
24V NEC Class 2 wiring. See Note 2.
Wire connections from evaporator module.
1. 24V GND
2. 24V supply
3. High pressure alarm (optional)
4. Hot gas bypass connection (only on
units with hot gas bypass)
DPN000226
Rev. 0

NOTES:

1. Refer to specification sheet for full load amp and wire size amp ratings.
2. Control voltage wiring must be a minimum of 16 GA (1.6mm) for up to 75’ (23m)
or not to exceed 1 volt drop in control line.

51

Split System Models

Figure 26 Split systems general arrangement

Hot Gas
Bypass Solenoid
Valve
Liquid Injection
Valve Bulb

AIR COOLED
Service
Access
Ports

Condenser
Coil

High Pressure
Switch

Scroll
Compressor
1/2" (12.7mm) NPT
Pressure Relief Valve

Suction Line
Male Quick
Connect
Suction Line Coupling*
Female Quick
Connect
Coupling*
1

Sight
Glass

Check Valve

Head Pressure
Control with
Lee-Temp
Integral Check
Receiver
Hot Gas Valve
Pressure
Balancing
Tube in
External Sensing
Bypass Control
Tube
Liquid Injection
Receiver Heater Valve
Equalizer Bulb
Liquid Line Valve
Condenser
Valve
Pressure Limiting
Male Quick
Filter
Switch
Liquid
Line
Connect
Drier
Coupling* Solenoid Valve High Pressure
Liquid Line
Switch
Female Quick
Connect
Scroll
Expansion Coupling*
Compressor
Valve
Liquid Injection
Hot Gas Bypass
Valve Bulb
Solenoid Valve
Evaporator
Coil

WATER COOLED
GLYCOL COOLED
Service
Access
Ports
External
Equalizer

Sensing
Bulb
Filter
Drier

Expansion
Valve

Suction Line
Male Quick
Connect
Coupling*

Fluid Return
from Unit

Suction Line
Female Quick
Connect
Coupling*
1
Hot Gas Bypass
Control Valve
Liquid Injection
Valve
Liquid Line
Male Quick
Connect
Liquid Line
Coupling*
Female Quick
Connect
Coupling*

Water/Glycol
Return
Line
Water/Glycol
Supply
Line

Fluid Supply
to Unit
Shutoff
Valves*

2-Way Water
Regulating
Valve

Tube inTube
Condenser

Hose Bibs*

SINGLE CIRCUIT SHOWN
Evaporator
Coil

FACTORY
PIPING
OPTIONAL PIPING
*Components are not supplied by Liebert but
are recommended for proper circuit operation
and maintenance.
1 NOTE: Refer to installation manual for
field piping guidelines.

Fluid
Return
from Unit
Fluid Supply
to Unit

52

SL-11900 PG 5
3-Way Water
Regulating Valve (optional)

Split System Models

7.6

Water and Glycol-Cooled Condensing Units
For installation guidelines, refer to Installing the Indoor Condensing Unit on page 48.

7.6.1

Piping Considerations
It is recommended that manual service shut-off valves be installed at the supply and return line to
each unit. This will provide for routine service or emergency isolation of the unit.
When the water source for the condenser is of poor quality, it is good practice to provide cleanable filters in the supply line. These filters will trap the particles in the water supply and extend the service
life of the water-cooled condenser.
Table 30

Water and glycol-cooled unit connection sizes

Connection
Condenser Water Inlet

1-1/8" OD Cu

Condenser Water Outlet

1-1/8" OD Cu

Table 31

7.6.2

Size and Type

Suction Line

1-7/16" - 16 male #12 quick connect

Liquid Line

1-1/16" - 12 male #10 quick connect

Water and glycol-cooled condensing unit data
Net Weight

Glycol Volume

Model

lb

kg

gal

liters

MC_69W
MC_68W

282

128

2.0

7.6

Condenser Water Requirements
The standard maximum water pressure is 150 psig (1034 kPa). For applications above this pressure,
consult the factory about high pressure systems.
The system will operate in conjunction with a cooling tower, city water, or drycooler.

7.6.3

Regulating Valve Adjustment and Testing
Refer to 4.3.1 - Water Regulating Valve Adjustment and 4.3.3 - Testing Valve Function.

7.6.4

Glycol Systems
For split system glycol systems, use drycooler and pump data found in 5.0 - Glycol/GLYCOOLCooled Models. See Table 16 - Drycooler data.
Electrical control interconnect to drycooler is wired from water/glycol condensing unit.

53

Split System Models

Figure 27 Water/glycol-cooled condensing unit dimensions
32 "
(812.8mm)
CABINET
DIMENSION

32 "
(812.8mm)
CABINET
DIMENSION

Customer supplied threaded rods
for module support from ceiling
(typ. 4).

Removable Access Panel

24 "
(610mm)
CABINET
DIMENSION

1/2" (12.7mm) dia. holes for
module rigging (typ. 2 each end).
Hanger Bracket

Shaded area indicates a
recommended clearance of
30" (762mm) for component access
and removal.

33 5/8 "
(854.1mm)
THREADED ROD
CENTERS

29 13/16 "
(757.2mm)
THREADED ROD
CENTERS
NOTE: Unit is evenly spaced in reference
to threaded rod centers.

7/8" (22.2mm) & 1 1/8" (28.6mm)
dia. knockouts electrical entrance for
line voltage connection (Single Point
Power Kit)

7/8" (22.2mm) & 1 1/8" (28.6mm)
dia. knockouts electrical entrance for
line voltage connection
8 7/16 "
(214.4mm)

3 3/4 "
(95.2mm)

7 "
(177.8mm)

Suction Line male quick
connect location
Liquid Line male quick
connect location

1" (25.4mm) NPT Female Water/Glycol
Inlet Connection
1" (25.4mm) NPT Female Water/Glycol
Outlet Connection

7/8" (22.2mm) dia. electrical entrance
for low voltage connection.

7/8" (22.2mm) dia. knockout electrical entrance
for alternate control panel low voltage routing.

54

SL-11087 PG 6

Split System Models

Figure 28 Water/glycol-cooled condensing unit (con't.)
Electric service;
not by Liebert

Field-supplied unit disconnect
switch when factory unit
disconnect switch is not supplied

WATER/GLYCOL

Optional factory-installed
disconnect switch

Field-supplied 24V NEC Class1
wiring to fan/coil unit

Field-supplied 24V NEC Class1
wiring to drycooler
(glycol-cooled units only)

Line-voltage electric power
supply conduit entrance

Removable
Heat rejection connection.
Access
Field-supplied 24V NEC
Panel
Class 2 wiring. Wire
connections from evaporator
mod:
1. 24V ground
2. 24V supply
3. High pressure alarm (optional)
4. Hot gas bypass
connection (only on units with
hot gas bypass)

Connection terminal
for field-supplied
earth grounding wire
Low-voltage electric
power supply conduit entrance
Field-supplied 24V NEC
Class 1 wiring between
glycol condensing unit
and drycooler

Remote drycooler
connection; field-supplied
24V NEC Class 1 wiring
(glycol-cooled units only)

DPN000228_Rev0
NOTES
1. Refer to specification sheet for full load amp. and wire size amp. ratings.
2. Control voltage wiring must be a minimum of 16 GA (1.6mm) for up to 75' (23m)
or not to exceed 1 volt drop in control line.

55

R407C Refrigerant

8.0

R407C REFRIGERANT

Table 32

R407C pressure/temperature chart for operation and superheat (discharge/hot gas and suction
gas)

Temperature

Gauge Pressure

Temperature

Gauge Pressure

Temperature

Gauge Pressure

°F

°C

Psig

kPa

°F

°C

Psig

kPa

°F

°C

Psig

kPa

0.0

-17.8

18.9

130

35.0

1.7

54.8

378

70.0

21.1

114.9

792

1.0

-17.2

19.6

135

36.0

2.2

56.1

387

72.0

22.2

119.3

822

2.0

-16.7

20.4

141

37.0

2.8

57.5

396

74.0

23.3

124

853

3.0

-16.1

21.2

146

38.0

3.3

58.9

406

76.0

24.4

128

885

4.0

-15.6

22.0

152

39.0

3.9

60.3

415

78.0

25.6

133

917

5.0

-15.0

22.8

157

40.0

4.4

62.2

429

80.0

26.7

138

950

6.0

-14.4

23.6

163

41.0

5.0

63.1

435

82.0

27.8

143

984

7.0

-13.9

24.5

169

42.0

5.6

64.6

445

84.0

28.9

148

1019

8.0

-13.3

25.4

175

43.0

6.1

66.1

456

86.0

30.0

153

1054

9.0

-12.8

26.2

181

44.0

6.7

67.6

466

88.0

31.1

158

1091

10.0

-12.2

27.1

187

45.0

7.2

69.1

476

90.0

32.2

164

1128

11.0

-11.7

28.0

193

46.0

7.8

70.7

487

92.0

33.3

169

1167

12.0

-11.1

28.9

200

47.0

8.3

72.2

498

94.0

34.4

175

1206

13.0

-10.6

29.9

206

48.0

8.9

73.8

509

96.0

35.6

181

1246

14.0

-10.0

30.8

213

49.0

9.4

75.4

520

98.0

36.7

187

1287

15.0

-9.4

31.8

219

50.0

10.0

77.1

531

100.0

37.8

193

1329

16.0

-8.9

32.8

226

51.0

10.6

78.7

543

102.0

38.9

199

1372

17.0

-8.3

33.8

233

52.0

11.1

80.4

554

104.0

40.0

205

1416

18.0

-7.8

34.8

240

53.0

11.7

82.1

566

106.0

41.1

212

1461

19.0

-7.2

35.8

247

54.0

12.2

83.9

578

108.0

42.2

219

1507

20.0

-6.7

36.9

254

55.0

12.8

85.6

590

110.0

43.3

225

1553

21.0

-6.1

38.0

262

56.0

13.3

87.4

603

112.0

44.4

232

1601

22.0

-5.6

39.0

269

57.0

13.9

89.2

615

114.0

45.6

239

1650

23.0

-5.0

40.1

277

58.0

14.4

91.0

628

116.0

46.7

247

1701

24.0

-4.4

41.3

284

59.0

15.0

92.9

640

118.0

47.8

254

1752

25.0

-3.9

42.4

292

60.0

15.6

94.8

653

120.0

48.9

262

1804

26.0

-3.3

43.6

300

61.0

16.1

96.7

666

122.0

50.0

269

1858

27.0

-2.8

44.7

308

62.0

16.7

98.6

680

124.0

51.1

277

1912

28.0

-2.2

45.9

317

63.0

17.2

100.5

693

126.0

52.2

285

1968

29.0

-1.7

47.1

325

64.0

17.8

102.5

707

128.0

53.3

294

2025

30.0

-1.1

48.4

333

65.0

18.3

104.5

721

130.0

54.4

302

2083

31.0

-0.6

49.6

342

66.0

18.9

106.5

735

132.0

55.6

311

2143

32.0

0.0

50.9

351

67.0

19.4

108.6

749

134.0

56.7

320

2203

33.0

0.6

52.1

359

68.0

20.0

110.7

763

136.0

57.8

329

2265

34.0

1.1

53.5

369

69.0

20.6

112.8

778

138.0

58.9

338

2329

-

-

-

-

-

-

-

-

140.0

60.0

347

2393

NOTE
Use this table for superheat and for control adjustment (e.g., pressure switches). See
Table 33 for subcooling.

56

R407C Refrigerant

Table 33

R407C pressure/temperature chart for subcooling only (liquid measurements)

Temperature

Pressure Gauge

Temperature

Pressure Gauge

Temperature

Pressure Gauge

°F

°C

Psig

kPa

°F

°C

Psig

kPa

°F

°C

Psig

kPa

36.0

2.2

73

500

59.0

15.0

114

786

94.0

34.4

203

1402

37.0

2.8

74

511

60.0

15.6

116

801

96.0

35.6

209

1444

38.0

3.3

76

522

61.0

16.1

118

815

98.0

36.7

216

1488

39.0

3.9

77

533

62.0

16.7

120

830

100.0

37.8

222

1532

40.0

4.4

79

544

63.0

17.2

123

845

102.0

38.9

229

1578

41.0

5.0

81

556

64.0

17.8

125

860

104.0

40.0

236

1624

42.0

5.6

82

567

65.0

18.3

127

875

106.0

41.1

242

1671

43.0

6.1

84

579

66.0

18.9

129

891

108.0

42.2

249

1720

44.0

6.7

86

591

67.0

19.4

131

906

110.0

43.3

257

1769

45.0

7.2

87

602

68.0

20.0

134

922

112.0

44.4

264

1819

46.0

7.8

89

615

69.0

20.6

136

938

114.0

45.6

271

1870

47.0

8.3

91

627

70.0

21.1

138

954

116.0

46.7

279

1922

48.0

8.9

93

639

72.0

22.2

143

987

118.0

47.8

287

1975

49.0

9.4

95

652

74.0

23.3

148

1021

120.0

48.9

294

2029

50.0

10.0

96

664

76.0

24.4

153

1055

122.0

50.0

302

2085

51.0

10.6

98

677

78.0

25.6

158

1090

124.0

51.1

310

2141

52.0

11.1

100

690

80.0

26.7

163

1126

126.0

52.2

319

2198

53.0

11.7

102

704

82.0

27.8

169

1163

128.0

53.3

327

2256

54.0

12.2

104

717

84.0

28.9

174

1201

130.0

54.4

336

2315

55.0

12.8

106

730

86.0

30.0

180

1239

132.0

55.6

345

2376

56.0

13.3

108

744

88.0

31.1

185

1279

134.0

56.7

354

2437

57.0

13.9

110

758

90.0

32.2

191

1319

136.0

57.8

363

2500

58.0

14.4

112

772

92.0

33.3

197

1360

138.0

58.9

372

2563

-

-

-

-

-

-

-

-

140.0

60.0

381

2628

NOTE
Use this table for subcooling calculation ONLY. See Table 32 for superheat or control
adjustment.

8.1

Calculating Subcooling
Example
Measure the liquid pressure (e.g., 200 psig). Find the liquid saturation temperature at that pressure
on Table 33 (e.g., 93°F). Measure the temperature of the liquid line (e.g., 90°F). Subtract the actual
temperature from the liquid saturation temperature to obtain the subcooling (e.g., 93 – 90 = 3°F). If
the actual temperature is greater than the liquid saturation temperature, then there is no subcooling,
and the fluid may be a mixture of liquid and vapor.
Why There Are Two R407C Temperature and Pressure Tables
R407C is a blend of refrigerants that exhibits a temperature “glide” of approximately 8 to 12°F
(4 to 7°C. This “glide” is the difference between the liquid and vapor saturation temperatures at a
given pressure. Use the correct table for the saturation temperature you need. Table 32 is for superheat or operating controls. Table 33 is for subcooling only.

57

Ensuring The High Availability
Of Mission-Critical Data And Applications.

Emerson Network Power, the global leader in enabling business-critical
continuity, ensures network resiliency and adaptability through
a family of technologies—including Liebert power and cooling
technologies—that protect and support business-critical systems.
Liebert solutions employ an adaptive architecture that responds
to changes in criticality, density and capacity. Enterprises benefit
from greater IT system availability, operational flexibility and
reduced capital equipment and operating costs.

Technical Support / Service
Web Site
www.liebert.com
Monitoring
800-222-5877
Liebert.monitoring@emerson.com
Outside the US: 614-841-6755
Single-Phase UPS
800-222-5877
upstech@emersonnetworkpower.com
Outside the US: 614-841-6755
Three-Phase UPS
800-543-2378
powertech@emersonnetworkpower.com
Environmental Systems
800-543-2778
Outside the United States
614-888-0246

Locations
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
7/F, Dah Sing Financial Centre
108 Gloucester Road, Wanchai
Hong Kong
852 2572220
Fax: 852 28029250

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.
© 2008 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.

SL-11956_REV0_07-08

Emerson Network Power.
The global leader in enabling Business-Critical Continuity.
AC Power
Embedded Computing
Embedded Power
Connectivity
DC Power

Monitoring

Outside Plant
Power Switching & Controls
Precision Cooling

EmersonNetworkPower.com
Racks & Integrated Cabinets
Services
Surge Protection

Business-Critical Continuity, Emerson Network Power and the Emerson Network Power logo are trademarks and service marks of Emerson Electric Co.
©2008 Emerson Electric Co.



---

Source Exif Data:

File Type                       : PDF
File Type Extension             : pdf
MIME Type                       : application/pdf
PDF Version                     : 1.6
Linearized                      : Yes
Page Mode                       : UseOutlines
XMP Toolkit                     : Adobe XMP Core 4.0-c320 44.284297, Sun Apr 15 2007 17:19:00
Producer                        : Acrobat Distiller 8.1.0 (Windows)
Creator Tool                    : FrameMaker 7.0
Modify Date                     : 2008:07:18 15:49:15-04:00
Create Date                     : 2008:07:18 15:41:09Z
Metadata Date                   : 2008:07:18 15:49:15-04:00
Format                          : application/pdf
Title                           : untitled
Document ID                     : uuid:88251ccb-3a64-4388-8291-c38ab8be71ad
Instance ID                     : uuid:2d8af2cc-1ea8-4bf3-9fa6-6dbaf3d61308
Has XFA                         : No
Page Count                      : 64
Creator                         : FrameMaker 7.0

EXIF Metadata provided by EXIF.tools