Carrier 50Tfq008 012 Users Manual

50TFQ008-012 to the manual 8109643d-3fdb-4527-ae38-6cf01a39272b

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50TFQ008-012
Single-Package Rooftop
Heat Pump Units

Installation, Start-Up and
Service Instructions
CONTENTS
Page
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . . . . . . .1
INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-43
Step 1— Provide Unit Support . . . . . . . . . . . . . . . . . . . . . . .1
• ROOF CURB
• SLAB MOUNT
• ALTERNATE UNIT SUPPORT
Step 2 — Field Fabricate Ductwork . . . . . . . . . . . . . . . . . .3
Step 3 — Install Condensate Drain Line
and External Trap . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3
Step 4 — Rig and Place Unit . . . . . . . . . . . . . . . . . . . . . . . . .3
• POSITIONING
Step 5 — Make Electrical Connections . . . . . . . . . . . . . .7
• FIELD POWER SUPPLY
• FIELD CONTROL WIRING
• DEFROST BOARD
• HEAT ANTICIPATOR SETTINGS
Step 6 — Adjust Factory-Installed Options . . . . . . . . .12
• DISCONNECT SWITCH
• CONVENIENCE OUTLET
• NOVAR CONTROLS
• MANUAL OUTDOOR-AIR DAMPER
• PREMIERLINK™ CONTROL
• OPTIONAL ECONOMI$ER IV AND ECONOMI$ER2
• ECONOMI$ER IV STANDARD SENSORS
• ECONOMI$ER IV CONTROL MODES
Step 7 — Adjust Indoor-Fan Speed . . . . . . . . . . . . . . . . .25
PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44
START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44-47
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47-49
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49-53
INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .54
START-UP CHECKLIST . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1

SAFETY CONSIDERATIONS
Installation and servicing of air-conditioning equipment can
be hazardous due to system pressure and electrical components. Only trained and qualified service personnel should
install, repair, or service air-conditioning equipment.
Untrained personnel can perform basic maintenance functions of cleaning coils and filters and replacing filters. All other
operations should be performed by trained service personnel.
When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and
other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work
gloves. Use quenching cloth for unbrazing operations. Have
fire extinguisher available for all brazing operations.

Before performing service or maintenance operations on
unit, turn off main power switch to unit and install lockout
tag. Ensure voltage listed on unit data plate agrees with
electrical supply provided for the unit. Electrical shock
could cause personal injury.

INSTALLATION
Unit is shipped in the vertical configuration. To convert to
horizontal configuration, remove side duct opening covers. Using the same screws, install covers on vertical duct openings
with the insulation-side down. Seals around duct openings
must be tight.

Step 1 — Provide Unit Support
ROOF CURB — Assemble and install the accessory roof curb
in accordance with instructions shipped with the curb. See
Fig. 1. Install insulation, cant strips, roofing felt, and counter
flashing as shown. Ductwork must be attached to curb. If
electric or control power will be routed through the basepan,
use the proper accessory kit listed in Fig. 1, available from your
local distributor. Attach the accessory thru-the-bottom service
connections to the basepan in accordance with the accessory
installation instructions. Connections must be installed before
the unit is set on the roof curb.
IMPORTANT: The gasketing of the unit to the roof curb is
critical for a water-tight seal. Install gasket supplied with
the roof curb as shown in Fig. 1. Improperly applied gasket
can also result in air leaks and poor unit performance.
The roof curb should be level. Unit leveling tolerances are
shown in Fig. 2. This is necessary for the unit drain to function
properly. Refer to Accessory Roof Curb Installation Instructions for additional information as required.

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500019-01
Printed in U.S.A.
Form 50TFQ-9SI
Pg 1
9-05
Replaces: 50TFQ-7SI
Book 1 4
Tab 5a 5a

Fig. 1 — Roof Curb Details

2

pitch the line away from the unit at 1/4-in. per ft of run. Do not
use a pipe size smaller than the unit connection. See Fig. 4.

Step 4 — Rig and Place Unit — Inspect the unit for
transportation damage. File any claim with the transportation
agency. Keep the unit upright and do not drop it. Spreader bars
are not required if top crating is left on the unit. Rollers may be
used to move the unit across a roof. Level by using the unit
frame as a reference. See Table 1 and Fig. 5 for additional
information. Operating weight is shown in Table 1 and Fig. 5.
Lifting holes are provided in the base rails as shown in
Fig. 5 and 6. Refer to rigging instructions on the unit.
POSITIONING — Maintain clearance around and above the
unit to provide proper airflow and service access. See Fig. 6.
Position the unit on the roof curb so that the following clearances are maintained: 1/4-in. clearance between the roof curb
and base rails on each side and in front of the unit; 35/16-in.
clearance between the roof curb and the outdoor fan end of the
unit (see Fig. 1, section C-C).
Do not install the unit indoors. Do not locate the unit air
inlet near exhaust vents or other sources of contaminated air.
Although the unit is weatherproof, guard against water from
higher level runoff and overhangs.
After the unit is in position, remove the polyethylene shipping wrapper and rigging skid.

MAXIMUM ALLOWABLE
DIFFERENCE (in.)
A-B
0.5

B-C
1.0

A-C
1.0

Fig. 2 — Unit Leveling Tolerances
SLAB MOUNT (Horizontal Units Only) — Provide a level
concrete slab that extends a minimum of 6 in. beyond the unit
cabinet on all sides. Install a gravel apron in front of the
outdoor coil air inlet to prevent grass and foliage from obstructing airflow.
NOTE: Horizontal units may be installed on a roof curb if
required.
ALTERNATE UNIT SUPPORT — When the curb or
adapter cannot be used, support unit with sleeper rails using
unit curb or adapter support area. If sleeper rails cannot be
used, support the long sides of the unit with a minimum of
3 equally spaced 4-in. x 4-in. pads on each side.

Step 2 — Field Fabricate Ductwork — On vertical discharge units, secure all ducts to the roof curb and building
structure. Do not connect ductwork to the unit. For horizontal
applications, field-supplied flanges should be attached to
horizontal discharge openings and all ductwork attached to the
flanges. Insulate and weatherproof all external ductwork, joints,
and roof openings with counter flashing and mastic in accordance with applicable codes.
Ducts passing through an unconditioned space must be
insulated and covered with a vapor barrier.
If a plenum return is used on a vertical unit, the return
should be ducted through the roof deck to comply with applicable fire codes.
A minimum clearance is not required around ductwork.
Cabinet return-air static pressure (a negative condition) should
not exceed 0.35 in. wg with economizer, or 0.45 in. wg without
economizer.

HORIZONTAL
DRAIN OUTLET

DRAIN PLUG

NOTE: Drain plug is shown in factory-installed position.

Fig. 3 — Condensate Drain Pan (Side View)

Step 3 — Install Condensate Drain Line and
External Trap — Condensate drain connections are located at the bottom and end of the unit. Unit discharge connections do not determine the use of drain connections;
either drain connection can be used in vertical or horizontal
applications.
When using the standard end drain connection, make sure
the plug in the alternate bottom connection is tight before installing the unit.
To use the bottom drain connection for a roof curb installation, relocate the factory-installed plug from the bottom connection to the end connection. The center drain plug looks like a star
connection, but can be removed with a 1/2-in. socket drive extension. See Fig. 3. The piping for the condensate drain and external
trap can be completed after the unit is in place.
All units must have an external trap for condensate drainage. Install a trap at least 4-in. deep and protect against freezeup. If drain line is installed downstream from the external trap,

NOTE: Trap should be deep enough to offset maximum unit static
difference. A 4-in. trap is recommended.

Fig. 4 — Condensate Drain Piping Details

3

NOTES:
1. Dimension in ( ) is in millimeters.
2. Hook rigging shackles through holes in base rail, as shown in detail “A.”
Holes in base rails are centered around the unit center of gravity. Use
wooden top skid when rigging to prevent rigging straps from damaging
unit.
3. Unit weights do not include economizer. See Table 1 for economizer
weights.

50TFQ
008
009
012

WEIGHT
Lb
Kg
940
426
965
438
1015
460

All panels must be in place when rigging. Unit is not designed for handling
by a fork truck. Damage to unit may result.

Fig. 5 — Rigging Details

4

A
in.
77.42
77.42
77.42

B
mm
1966.5
1966.5
1966.5

in.
41.5
41.5
41.5

C
mm
1054
1054
1054

in.
42.12
42.12
42.12

mm
1070
1070
1070

Table 1 — Physical Data
UNIT SIZE 50TFQ
NOMINAL CAPACITY (tons)
OPERATING WEIGHT (lb)
Unit
Economizer
EconoMi$er IV
Roof Curb*
COMPRESSOR (Hermetic)
Quantity
Oil (oz)
REFRIGERANT TYPE
Operating Charge (lb-oz)
Circuit 1
Circuit 2
OUTDOOR COIL
Rows...Fins/in.
Total Face Area (sq ft)
OUTDOOR FAN
Nominal Cfm
Quantity...Diameter (in.)
Motor Hp...Rpm
Watts Input (Total)
INDOOR COIL
Rows...Fins/in.
Total Face Area (sq ft)
INDOOR FAN
Quantity...Size (in.)
Type Drive
Nominal Cfm
Maximum Continuous Bhp
Motor Frame Size
Nominal Rpm
Fan Rpm Range
Motor Bearing Type
Maximum Allowable Rpm
Motor Pulley Pitch Diameter Min/Max (in.)
Nominal Motor Shaft Diameter (in.)
Fan Pulley Pitch Diameter (in.)
Belt, Quantity...Type...Length (in.)
Pulley Center Line Distance (in.)
Speed Change per Full Turn of
Moveable Pulley Flange (rpm)
Moveable Pulley Maximum Full Turns
From Closed Position
Factory Setting
Factory Speed Setting (rpm)

008
71/2

009
81/2

012
10

940

965

1015

75
143

75
143

75
143
Scroll
2
54 ea

Reciprocating
2
45 ea

2
54 ea
R-22

5-14
8- 6
7-14
5-13
8-13
8- 3
Enhanced Copper Tubes, Aluminum Lanced Fins, Acutrol™ Feed Device
1...17
2...17
2...17
20.50
18.00
18.30
Propeller Type
6500
6500
6500
2...22
2...22
2...22
1/ ...1100
1/ ...1100
1/ ...1100
4
4
4
500
500
500
Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol Feed Device
3...15
3...15
3...15
8.0
8.0
11.1
Centrifugal Type
1...15 x 15
1...15 x 15
1...15 x 15
1...15 x 15
—
1...15 x 15
1...15 x 15
1...15 x 15
1...15 x 15
Belt
Belt
Belt
Belt
—
Belt
Belt
Belt
Belt
3000
3600
4000
2.40
2.40
2.40
2.40
—
2.90
3.70
3.70
5.25
56
56
56
56
—
56
56
56
56
—
—
—
—
—
—
1725
1725
1725
590- 840
685- 935
685- 935
685- 935
—
835-1085
860-1080
860-1080
830-1130
Ball
Ball
Ball
2100
2100
2100
2.4/3.4
2.8/3.8
2.8/3.8
2.8/3.8
—
3.4/4.4
4.0/5.0
4.0/5.0
2.8/3.8
5/
5/
5/
8
8
8
5/8
7/8
—
7/8
7/8
7/8
7.0
7.0
7.0
7.0
—
7.0
8.0
8.0
5.8
1...A...53
1...A...48
1...A...49
1...A...49
—
1...A...51
1...A...65
1...A...53
1...BX...48
16.75-19.25
16.75-19.25
15.85-17.50
16.75-19.25
—
15.85-17.50
16.75-19.25
16.75-19.25
15.85-17.50
50
50
50
50
—
50
60
60
60
5
5
5
5
—
5
5
5
6
5
5
5
5
—
5
5
5
5
590
685
685
685
—
835
860
880
887
1
1
1

Std
Alt
High-Static
Std
Alt
High-Static
Std
Alt
High-Static
Std
Alt
High-Static
Std
Alt
High-Static
Std
Alt
High-Static
Std
Alt
High-Static
Std
Alt
High-Static
Std
Alt
High-Static
Std
Alt
High-Static
Std
Alt
High-Static
Std
Alt
High-Static
Std
Alt
High-Static
Std
Alt
High-Static
Std
Alt
High-Static

Fan Shaft Diameter at Pulley (in.)
HIGH-PRESSURE SWITCH (psig)
Standard Compressor Internal Relief (Differential)
Cutout
Reset (Auto.)
LOSS-OF-CHARGE (LOW-PRESSURE) SWITCH (psig)
Cutout
Reset (Auto.)
FREEZE PROTECTION THERMOSTAT (F)
Opens
Closes
OUTDOOR-AIR INLET SCREENS

450 ± 50
428
320
7±3
22 ± 5
30 ± 5
45 ± 5
Cleanable.
Screen quantity and size vary based on options selected.
Throwaway
4...16 x 20 x 2
4...16 x 20 x 2
4...20 x 20 x 2

RETURN-AIR FILTERS
Quantity...Size (in.)
LEGEND
Bhp — Brake Horsepower

*Weight of 14-in. roof curb.

5

6
Fig. 6 — Base Unit Dimensions

Step 5 — Make Electrical Connections

When installing units, provide a disconnect per the NEC.
All field wiring must comply with the NEC and local requirements. In Canada, electrical connections must be made in
accordance with CSA (Canadian Standards Association) C22.1
Canadian Electrical Code Part One.
Install field wiring as follows:
1. Install conduit through the side panel openings. For units
without electric heat, install conduit between the disconnect and control box.
2. Install power lines to terminal connections as shown in
Fig. 7.
3. For units with electric heat, refer to Table 2 and Accessory
Installation Instructions.
During operation, voltage to compressor terminals must be
within range indicated on unit nameplate (see Tables 3A and
3B). On 3-phase units, voltages between phases must be balanced within 2%, and the current within 10%. Use the formula
shown in Tables 3A and 3B, Note 2 on page 11 to determine
the percentage of voltage imbalance. Operation on improper
line voltage or excessive phase imbalance constitutes abuse
and may cause damage to electrical components. Such operation would invalidate any applicable Carrier warranty.

Unit cabinet must have an uninterrupted, unbroken electrical ground to minimize the possibility of personal injury if
an electrical fault should occur. This ground may consist of
electrical wire connected to unit ground lug in control compartment, or conduit approved for electrical ground when
installed in accordance with NEC (National Electrical
Code) ANSI (American National Standards Institute)/
NFPA (National Fire Protection Association) 70 latest year
and local electrical codes. Failure to follow this warning
could result in the installer being liable for personal injury
of others.
FIELD POWER SUPPLY — All units except 208/230-v
units are factory-wired for the voltage shown on the unit nameplate. If the 208/230-v unit is to be connected to a 208-v power
supply, the transformer must be rewired by disconnecting the
black wire from the 230-v 1/4-in. male spade terminal on the
transformer and connecting it to the 208-v 1/4-in. male spade
terminal from the transformer.
Refer to the unit label diagram for additional information.
Pigtails are provided for field wire connections. Use factorysupplied splices or a UL (Underwriters’ Laboratories) approved
copper/aluminum connector.

575-3-60

208/230-3-60
460-3-60
C
COMP
IFC
NEC
TB

—
—
—
—
—

LEGEND
Contactor
Compressor
Indoor-Fan Contactor
National Electrical Code
Terminal Block
Field Wiring
Factory Wiring
Splice Connection
(Factory-Supplied)

Fig. 7 — Power Wiring Connections

7

Table 2 — Electric Heating Capacities
50TFQ
UNIT SIZE

UNIT VOLTAGE
(60 Hz)

208/230/240
(3 phase)

008, 009
460/480
(3 phase)
575
(3 phase)
208/230/240
(3 phase)

012

460/480
(3 phase)

575
(3 phase)

ELECTRIC HEATER
PART NUMBER
CRHEATER---A00
017
010
011
012
012 and 017
016
013
014
015
014 and 016
018
019
017
010
012
012 and 017
010 and 012
013
014
015
014 and 016
013 and 015
018
019
018 and 019

ACCESSORY
kW
7.8/ 9.6/10.4
12.0/14.7/16.0
18.6/22.8/24.8
24.0/29.4/32.0
31.8/39.0/42.4*
12.8/13.9
15.2/16.5
25.6/27.8
30.4/33.0
38.4/41.7*
17.0
34.0
7.8/ 9.6/10.4
12.0/14.7/16.0
24.0/29.4/32.0
31.8/39.0/42.4*
37.6/46.2/50.0*
15.2/16.5
25.6/27.8
30.4/33.0
38.4/41.7*
45.9/50.0*
17.0
34.0
51.0*

SINGLE POINT BOX
PACKAGE NO.
CRSINGLE---A00
007
007
009
009
013
006
006
008
008
010
006
006†
012
012
015
017
017
011
014
014
016
016
011
014
016

*Two heater packages required to provide kW indicated.
†Use CRSINGLE008A00 for units with an electrical convenience outlet.
NOTES:
1. The rated heater voltage is 240, 480, and 575 v. If power distribution voltage varies from rated heater voltage, heater kW will vary accordingly.
2. To determine heater kW at voltages other than those shown in table, use the following formula:
Heater kW new = Heater kW rated x (unit power distribution voltage/rated heater voltage)2
As an example:
For a 16 kW heater rated at 240 v with a power distribution voltage of 215 v
kW new = 16 kW (215/240)2
kW new = 12.8 kW (rating at 215 v)

Table 3A — Electrical Data (Units Without Electrical Convenience Outlet)
VOLTAGE COMPRESSOR
ELECTRIC HEAT*
RANGE
(each)
OFM IFM
FLA FLA Nominal
Min Max RLA
LRA
FLA
kW**
—
—
7.8/10.4 21.7/ 25.0
12.0/16.0 33.3/ 38.5
STD
187 254
13.4
91.0
1.4
5.8
18.6/24.8 51.6/ 59.7
24.0/32.0 66.6/ 77.0
31.8/42.4 88.3/102.0
208/230-3-60
—
—
7.8/10.4 21.7/ 25.0
12.0/16.0 33.3/ 38.5
HIGH-STATIC 187 254
13.4
91.0
1.4 10.6
18.6/24.8 51.6/ 59.7
24.0/32.0 66.6/ 77.0
31.8/42.4 88.3/102.0
—
—
13.9
16.7
16.5
19.8
008
STD
414 508
6.7
42.0
0.7
2.6
(71/2 Tons)
27.8
33.4
33.0
39.7
41.7
50.2
460-3-60
—
—
13.9
16.7
16.5
19.8
HIGH-STATIC 414 508
6.7
42.0
0.7
4.8
27.8
33.4
33.0
39.7
41.7
50.2
—
—
STD
2.6
17.0
17.1
34.0
34.1
575-3-60
518 632
5.4
39.0
0.7
—
—
HIGH-STATIC
4.8
17.0
17.1
34.0
34.1
50TFQ
UNIT SIZE

NOMINAL
V-PH-Hz

IFM
TYPE

NOTE: Legend and Notes for Electrical Data are on page 11.

8

POWER SUPPLY

DISCONNECT
SIZE†

MCA

MOCP

FLA

LRA

38.8/ 38.8
65.9/ 70.0
80.4/ 86.9
103.3/113.4
122.0/135.0
149.1/166.3
43.6/ 43.6
70.7/ 74.8
85.2/ 91.7
108.1/118.2
126.8/139.8
153.9/171.1
19.1
40.0
43.8
60.8
68.7
81.8
21.3
42.2
46.0
63.0
70.9
84.0
15.4
36.7
58.0
17.1
38.5
59.7

40/ 40††
70/ 70
90/ 90
110/125
125/150
150/175
45/ 45††
80/ 80
90/100
110/125
150/150
175/175
20††
40††
45††
70
70
90
25††
45††
50††
70
80
90
20††
40††
60††
20††
40††
60††

41/ 41
66/ 69
79/ 85
100/109
117/129
142/158
46/ 46
71/ 75
85/ 91
106/115
123/135
148/164
20
39
43
58
66
78
23
42
45
61
68
80
16
36
55
18
38
57

229/229
251/254
262/268***
281/289***
296/306***
317/331***
273/273
294/298
306/311***
324/332***
339/350***
361/375***
108
124
128
141
147
158
130
146
149
163
169
180***
97
114
131
114
132
149

Table 3A — Electrical Data (Units Without Electrical Convenience Outlet) (cont)
50TFQ
UNIT SIZE

NOMINAL
V-PH-Hz

IFM
TYPE

VOLTAGE
RANGE

COMPRESSOR
(each)

Min

RLA

Max

LRA

OFM
FLA

IFM
FLA

STD

187

254

16.0

137.0

1.4

5.8

HIGH-STATIC

187

254

16.0

137.0

1.4

10.6

STD

414

508

8.3

69.0

0.7

2.6

HIGH-STATIC

414

508

8.3

69.0

0.7

4.8

518

632

6.4

58.0

0.7

208/230-3-60

009
(81/2 Tons)

460-3-60

STD
575-3-60

2.6

HIGH-STATIC

208/230-3-60

4.8

STD

187

254

17.2

124.0

1.4

5.8

ALT

187

254

17.2

124.0

1.4

7.5

HIGH-STATIC

187

254

17.2

124.0

1.4

15.0

STD

414

508

8.6

59.6

0.7

2.6

ALT

414

508

8.6

59.6

0.7

3.4

HIGH-STATIC

414

508

8.6

59.6

0.7

7.4

STD

518

632

6.9

49.4

0.7

2.6

ALT

518

632

6.9

49.4

0.7

3.4

HIGH-STATIC

518

632

6.9

49.4

0.7

7.4

012
(10 Tons)

460-3-60

575-3-60

NOTE: Legend and Notes for Electrical Data are on page 11.

9

ELECTRIC HEAT*
Nominal
kW**
—
7.8/10.4
12.0/16.0
18.6/24.8
24.0/32.0
31.8/42.4
—
7.8/10.4
12.0/16.0
18.6/24.8
24.0/32.0
31.8/42.4
—
13.9
16.5
27.8
33.0
41.7
—
13.9
16.5
27.8
33.0
41.7
—
17.0
34.0
—
17.0
34.0
—
7.8/10.4
12.0/16.0
24.0/32.0
31.8/42.4
37.6/50.0
—
7.8/10.4
12.0/16.0
24.0/32.0
31.8/42.4
37.6/50.0
—
7.8/10.4
12.0/16.0
24.0/32.0
31.8/42.4
37.6/50.0
—
16.5
27.8
33.0
41.7
50.0
—
16.5
27.8
33.0
41.7
50.0
—
16.5
27.8
33.0
41.7
50.0
—
17.0
34.0
51.0
—
17.0
34.0
51.0
—
17.0
34.0
51.0

POWER SUPPLY

DISCONNECT
SIZE†

FLA

MCA

MOCP

FLA

LRA

—
21.7/ 25.0
33.3/ 38.5
51.6/ 59.7
66.6/ 77.0
88.3/102.0
—
21.7/ 25.0
33.3/ 38.5
51.6/ 59.7
66.6/ 77.0
88.3/102.0
—
16.7
19.8
33.4
39.7
50.2
—
16.7
19.8
33.4
39.7
50.2
—
17.1
34.1
—
17.1
34.1
—
21.7/ 25.0
33.3/ 38.5
66.6/ 77.0
88.3/102.0
104.4/120.3
—
21.7/ 25.0
33.3/ 38.5
66.6/ 77.0
88.3/102.0
104.4/120.3
—
21.7/ 25.0
33.3/ 38.5
66.6/ 77.0
88.3/102.0
104.4/120.3
—
19.8
33.4
39.7
50.2
60.1
—
19.8
33.4
39.7
50.2
60.1
—
19.8
33.4
39.7
50.2
60.1
—
17.1
34.1
51.2
—
17.1
34.1
51.2
—
17.1
34.1
51.2

44.6/ 44.6
71.7/ 75.9
86.2/ 92.7
109.1/119.2
127.9/140.9
155.0/172.1
49.4/ 49.4
76.5/ 80.7
91.0/ 97.5
113.9/124.0
132.7/145.7
159.8/176.9
22.7
43.6
47.4
64.4
72.3
85.4
24.9
45.8
49.6
66.6
74.5
87.6
17.6
39.0
60.2
19.4
40.7
62.0
47.3/ 47.3
74.4/ 78.6
88.9/ 95.4
130.6/143.6
157.7/174.8
177.8/167.6
49.0/ 49.0
76.1/ 80.8
90.6/ 97.1
132.3/145.3
159.4/176.5
179.5/169.3
56.5/ 56.5
83.6/ 87.8
98.1/104.6
139.8/152.8
166.9/184.0
187.0/176.8
23.4
48.1
65.1
73.0
86.1
83.5
24.2
48.9
65.9
73.8
86.9
84.3
28.2
52.9
69.9
77.8
90.9
88.3
18.7
40.1
61.4
69.9
19.4
40.7
62.0
70.6
22.6
43.9
65.2
73.8

45/ 45††
80/ 80
90/100
110/125
150/150
175/175
50/ 50††
80/ 90
100/100
125/125
150/150
175/200
25††
45††
50††
70
80
90
25††
50††
50††
70
80
90
20††
40††
70††
20††
45††
70
50/ 50††
80/ 80
90/100
150/150
175/175
200/175
50/ 50††
80/ 90
100/100
150/150
175/200
200/200
60/ 60††
90/ 90
100/110
150/175
175/200
200/200
25††
50††
70
80
90
90
25††
50††
70
80
90
90
30††
60††
70
80
100
100
20††
45††
70
70
20††
45††
70
80
25††
45††
70
80

47/ 47
72/ 75
85/ 91
106/115
123/135
148/164
52/ 52
77/ 81
91/ 96
112/121
129/141
154/170
24
43
46
62
69
81
26
45
49
65
72
84
18
38
58
20
40
60
49/ 49
74/ 78
88/ 94
126/138
151/167
170/188
51/ 51
76/ 80
90/ 96
128/140
153/169
171/190
60/ 60
85/ 89
98/104
137/149
162/177
180/198
24
47
63
70
82
93
25
48
64
71
83
94
30
53
68
76
88
99
20
39
59
78
20
40
60
79
24
44
63
83

321/321
343/346
354/360***
373/381***
388/398***
409/428***
365/365
386/390***
398/403***
416/424***
431/442***
453/467***
162
178
182
195
201
212***
184
200
203
217
223
234***
135
152
169
152
170
187
295/295
317/320
328/334***
362/372***
383/397***
399/415***
314/314
336/389***
347/353***
381/391***
402/416***
418/434***
362/362
384/387***
395/401***
429/439***
450/464***
466/482***
143
163
176
183
193***
203***
182
202
216
222
233***
243***
176
196
210
216
227***
237***
118
135
152
169
149
166
183
201***
145
162
179
196***

Table 3B — Electrical Data (Units With Electrical Convenience Outlet)
50TFQ
UNIT SIZE

NOMINAL
V-PH-Hz

IFM
TYPE

STD

208/230-3-60

HIGH-STATIC

008
(71/2 Tons)

STD

460-3-60

HIGH-STATIC

STD
575-3-60
HIGH-STATIC

STD

208/230-3-60

HIGH-STATIC

009
(81/2 Tons)

STD

460-3-60

HIGH-STATIC

STD
575-3-60
HIGH-STATIC

VOLTAGE
RANGE

COMPRESSOR
ELECTRIC
(each)
HEAT*
OFM IFM
FLA FLA Nominal
Min Max RLA
LRA
FLA
kW**
—
—
7.8/10.4 21.7/ 25.0
12.0/16.0 33.3/ 38.5
187 254
13.4
91.0
1.4
5.8
18.6/24.8 51.6/ 59.7
24.0/32.0 66.6/ 77.0
31.8/42.4 88.3/102.0
—
—
7.8/10.4 21.7/ 25.0
12.0/16.0 33.3/ 38.5
187 254
13.4
91.0
1.4 10.6
18.6/24.8 51.6/ 59.7
24.0/32.0 66.6/ 77.0
31.8/42.4 88.3/102.0
—
—
13.9
16.7
16.5
19.8
414 508
6.7
42.0
0.7
2.6
27.8
33.4
33.0
39.7
41.7
50.2
—
—
13.9
16.7
16.5
19.8
414 508
6.7
42.0
0.7
4.8
27.8
33.4
33.0
39.7
41.7
50.2
—
—
518 632
5.4
39.0
0.7
2.6
17.0
17.1
34.0
34.1
—
—
518 632
5.4
39.0
0.7
4.8
17.0
17.1
34.0
34.1
—
—
7.8/10.4 21.7/ 25.0
12.0/16.0 33.3/ 38.5
187 254
16.0
137.0
1.4
5.8
18.6/24.8 51.6/ 59.7
24.0/32.0 66.6/ 77.0
31.8/42.4 88.3/102.0
—
—
7.8/10.4 21.7/ 25.0
12.0/16.0 33.3/ 38.5
187 254
16.0
137.0
1.4 10.6
18.6/24.8 51.6/ 59.7
24.0/32.0 66.6/ 77.0
31.8/42.4 88.3/102.0
—
—
13.9
16.7
16.5
19.8
414 508
8.3
69.0
0.7
2.6
27.8
33.4
33.0
39.7
41.7
50.2
—
—
13.9
16.7
16.5
19.8
414 508
8.3
69.0
0.7
4.8
27.8
33.4
33.0
39.7
41.7
50.2
—
—
518 632
6.4
58.0
0.7
2.6
17.0
17.1
34.0
34.1
—
—
518 632
6.4
58.0
0.7
4.8
17.0
17.1
34.0
34.1

NOTE: Legend and Notes for Electrical Data are on page 11.

10

POWER SUPPLY

DISCONNECT
SIZE†

MCA

MOCP

FLA

LRA

43.6/ 43.6
70.7/ 74.8
85.2/ 91.7
108.1/118.2
126.8/139.8
153.9/171.1
48.4/ 48.4
75.5/ 79.6
90.0/ 96.5
112.9/123.0
131.6/144.6
158.7/175.9
21.3
42.1
46.0
63.0
70.9
84.0
23.5
44.3
48.2
65.2
73.1
86.2
17.1
38.5
59.7
18.9
40.2
61.5
49.4/ 49.4
76.5/ 80.7
91.0/ 97.5
113.9/124.0
132.7/145.7
154.8/176.9
54.2/ 54.2
81.3/ 85.5
95.8/102.3
118.7/128.8
137.5/150.5
164.6/181.7
24.9
45.7
49.6
66.6
74.5
87.6
27.1
47.9
51.8
68.8
76.7
89.8
19.3
40.7
62.0
21.1
42.5
63.7

45/ 45††
80/ 80
90/100
110/125
150/150
175/175
50/ 50††
80/ 80
90/100
125/125
150/150
175/200
25††
45††
50††
70
80
90
25††
45††
50††
70
80
90
20††
40††
60††
20††
45††
70
50/ 50††
80/ 90
100/100
125/125
150/150
175/200
60/ 60††
90/ 90
100/110
125/150
150/175
175/200
25††
50††
50††
70
80
90
30††
50††
60††
70
80
90
20††
45††
70
25††
45††
70

46/ 46
71/ 75
85/ 91
106/115
123/135
148/164
52/ 52
77/ 81
90/ 96
111/120
128/140
153/169
23
42
45
61
68
80
25
44
48
63
71
83
18
38
57
20
40
59
52/ 52
77/ 81
91/ 96
112/121
129/141
154/170
58/ 58
83/ 86
96/102
117/126
134/146
159/175
26
45
49
65
72
84
29
48
51
67
74
86
20
40
60
22
42
62

234/234
256/259
267/272***
285/294***
300/311***
322/336***
277/277
299/302***
311/316***
329/337***
344/354***
366/379***
110
127
130
143
150
160***
132
148
151
165
171
182***
99
116
133
116
133
150
326/326
348/351
359/364
377/386
392/403
414/428
369/369
391/394***
403/408***
421/429***
436/446***
458/471***
164
181
184
197
204
214***
186
202
205
219
225
236***
137
154
171
154
171
188

Table 3B — Electrical Data (Units With Electrical Convenience Outlet) (cont)
50TFQ
UNIT SIZE

NOMINAL
V-PH-Hz

208/230-3-60

IFM
TYPE

VOLTAGE
RANGE

COMPRESSOR
(each)

Min

RLA

Max

LRA

OFM
FLA

IFM
FLA

STD

187

254

17.2

124.0

1.4

5.8

ALT

187

254

17.2

124.0

1.4

7.5

HIGH-STATIC

187

254

17.2

124.0

1.4

15.0

STD

414

508

8.6

59.6

0.7

2.6

ALT

414

508

8.6

59.6

0.7

3.4

HIGH-STATIC

414

508

8.6

59.6

0.7

7.4

STD

518

632

6.9

49.4

0.7

2.6

ALT

518

632

6.9

49.4

0.7

3.4

HIGH-STATIC

518

632

6.9

49.4

0.7

7.4

012
(10 Tons)

460-3-60

575-3-60

FLA
HACR
IFM
LRA
MCA
MOCP
NEC
OFM
RLA

—
—
—
—
—
—
—
—
—

LEGEND
Full Load Amps
Heating, Air Conditioning and Refrigeration
Indoor Fan Motor
Locked Rotor Amps
Minimum Circuit Amps
Maximum Overcurrent Protection
National Electrical Code
Outdoor Fan Motor
Rated Load Amps

ELECTRIC
HEAT*
Nominal
FLA
kW**
—
—
7.8/10.4
21.7/ 25.0
12.0/16.0
33.3/ 38.5
24.0/32.0
66.6/ 77.0
31.8/42.4
88.3/102.0
37.6/50.0
104.4/120.3
—
—
7.8/10.4
21.7/ 25.0
12.0/16.0
33.3/ 38.5
24.0/32.0
66.6/ 77.0
31.8/42.4
88.3/102.0
37.6/50.0
104.4/120.3
—
—
7.8/10.4
21.7/ 25.0
12.0/16.0
33.3/ 38.5
24.0/32.0
66.6/ 77.0
31.8/42.4
88.3/102.0
37.6/50.0
104.4/120.3
—
—
16.5
19.8
27.8
33.4
33.0
39.7
41.7
50.2
50.0
60.1
—
—
16.5
19.8
27.8
33.4
33.0
39.7
41.7
50.2
50.0
60.1
—
—
16.5
19.8
27.8
33.4
33.0
39.7
41.7
50.2
50.0
60.1
—
—
17.0
17.1
34.0
34.1
51.0
51.2
—
—
17.0
17.1
34.0
34.1
51.0
51.2
—
—
17.0
17.1
34.0
34.1
51.0
51.2

DISCONNECT
SIZE†

POWER SUPPLY
MCA

MOCP

FLA

LRA

52.1/ 52.1
79.2/ 83.4
93.7/100.2
135.4/148.4
162.5/179.6
182.6/172.4
53.8/ 53.8
80.9/ 85.1
95.4/101.9
137.1/150.1
164.2/181.3
184.3/174.1
61.3/ 61.3
88.4/ 92.6
102.9/109.4
144.6/157.6
171.7/188.8
191.8/181.6
25.5
50.3
67.3
75.2
88.3
85.6
26.3
51.1
68.1
76.0
89.1
86.4
30.3
55.1
72.1
80.0
93.1
90.4
20.5
41.8
63.1
71.7
21.1
42.5
63.7
72.3
24.3
45.7
66.9
75.5

60/ 60††
80/ 90
100/110
150/150
175/200
200/200
60/ 60††
90/ 90
100/110
150/175
175/200
200/200
70/ 70
90/100
110/110
150/175
175/200
200/200
30††
60††
70
80
90
90
30††
60††
70
80
90
90
35††
60††
80
80
100
100
25††
45††
70
80
25††
45††
70
80
25††
50††
70
80

55/ 55
80/ 84
93/ 99
132/144
157/172
175/193
57/ 57
82/ 86
95/101
134/145
158/174
177/195
66/ 66
91/ 94
104/110
142/154
167/183
186/204
27
50
65
73
85
96
28
51
66
73
86
97
32
55
71
78
90
102
22
41
61
80
22
42
62
81
26
46
65
85

300/300
322/325***
333/338***
366/377***
388/402***
404/420***
319/319
341/344***
352/357***
385/396***
407/421***
423/439***
367/367
389/392***
400/405***
433/444***
455/459***
471/487***
145
165
178
185
195***
205***
185
204
218
224
235***
245***
179
198
212
218
229***
239***
120
137
154
171***
151
168
185
202***
146
163
180
198***

% Voltage Imbalance
max voltage deviation from average voltage
= 100 x
average voltage
Example: Supply voltage is 460-3-60.
AB = 452 v
BC = 464 v
AC = 455 v
Average Voltage =

452 + 464 + 455
3

1371
3
= 457
Determine maximum deviation from average voltage.
(AB) 457 – 452 = 5 v
(BC) 464 – 457 = 7 v
(AC) 457 – 455 = 2 v
=

*Heaters are field installed only.
†Used to determine minimum disconnect size per NEC.
**Heater capacity (kW) is based on heater voltage of 208 v, 240 v, 480 v, and 575 v. If
power distribution voltage to unit varies from rated heater voltage, heater kW will vary
accordingly.
††Fuse or HACR circuit breaker.
***Optional disconnect switch is unavailable.

Maximum deviation is 7 v.
Determine percent of voltage imbalance.
7
% Voltage Imbalance = 100 x
457
= 1.53%
This amount of phase imbalance is satisfactory as it is below the maximum allowable
2%.

NOTES:
1. In compliance with NEC requirements for multimotor and combination load equipment
(refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall
be fuse or HACR breaker.
2. Unbalanced 3-Phase Supply Voltage
Never operate a motor where a phase imbalance in supply voltage is greater than 2%.
Use the following formula to determine the percent of voltage imbalance.

IMPORTANT: If the supply voltage phase imbalance is more than 2%, contact your local
electric utility company immediately.

11

DEFROST BOARD — The defrost board timer cycle is set to
30 minutes. To change the cycle time, turn off power to the
unit and install lockout tag. Remove the wire from defrost
board connected to the 30 minute quick-connect. See Fig. 10.
Connect the wire to the 50 or 90 minute quick-connects on the
defrost board, depending on the desired defrost time.
HEAT ANTICIPATOR SETTINGS — For units with electric
heat, set heat anticipator settings as shown in Table 4.

FIELD CONTROL WIRING — Install a Carrier-approved
accessory thermostat assembly according to the installation
instructions included with the accessory. Locate the thermostat
assembly on a solid wall in the conditioned space to sense average temperature in accordance with the thermostat installation
instructions.
NOTE: If using a Carrier electronic thermostat, set the thermostat configuration for “non-heat pump operation.” This family
of products does not require an O terminal to energize the
reversing valve.
Route the thermostat cable or equivalent single leads of
colored wire from the subbase terminals to the low-voltage
connections on the unit (shown in Fig. 8A and 8B) as described
in Steps 1 through 4 below.
NOTE: For wire runs up to 50 ft, use no. 18 AWG (American
Wire Gage) insulated wire (35 C minimum). For 51 to 75 ft,
use no. 16 AWG insulated wire (35 C minimum). For over
75 ft, use no. 14 AWG insulated wire (35 C minimum). All
wire larger than no. 18 AWG cannot be directly connected to
the thermostat and will require a junction box and splice at the
thermostat.
1. If the unit is mounted on the roof curb and the accessory
thru-the-curb service plate connection is used, route wire
through the connection plate.
2. Pass control wires through the hole provided on the unit
(see connection D in Connection Sizes table in Fig. 6).
3. Feed wire through the raceway built into the corner post to
the 24-v barrier located on the left side of the control box.
See Fig. 9. The raceway provides the UL required clearance between the high-voltage and low-voltage wiring.
4. Connect the thermostat wires to the screw terminals of
the low-voltage connector (see Fig. 8A and 8B).
NOTE: If the unit is mounted on a roof curb and electrical
power will be run up “thru-the-bottom,” use accessory kit
number CRBTMPWR002A01. This kit, available from your
local distributor, ensures a watertight seal. Refer to the accessory installation instructions for information on power wiring.
Refer to Fig. 6 for drilling holes in basepan.

Step 6 — Adjust Factory-Installed Options
DISCONNECT SWITCH — The optional disconnect switch
is non-fused. The switch can be locked in place for safety
purposes.

CONTROL
CONNECTION
BOARD

THERMOSTAT CONTROL
CONNECTION
BOARD

R

24 VAC

R

R

G

RMTOCC

Y1

Y1

CMPSAFE

Y2

Y2

Y2

FSD

W1

W1

W1

SFS

W2

W2

NOT USED

G

G

C

C

C

C
X

X
X
Fig. 8B — Low Voltage Connections
(Units with PremierLink™ Controls)

DISCONNECT
BOARD

COOL STAGE 1

Y1/W2

R

FAN

G

G

HEAT STAGE 1

W/W1

Y1

COOL STAGE 2

Y/Y2

Y2

HEAT STAGE 2

O/W2

W1

24 VAC HOT

R

W2

24 VAC COM

C

DISCONNECT
SWITCH
(OPTIONAL)

WIRE
CONNECTIONS
TO
LOW-VOLTAGE
SECTION
(CONNECTION
BOARD)

RACEWAY

C
IPD/X

COMPRESSOR
NO. 2

N/A
OUTDOOR AIR

S1

SENSOR

S2

CONVENIENCE
OUTLET
HOLE IN
END
PANEL

THERMOSTAT DIPSWITCH SETTINGS
ON
OFF
D
B
A
C

LEGEND
Field Wiring
NOTE: Underlined letter indicates active thermostat output when
configured for A/C operation.

COMPRESSOR NO. 1

Fig. 8A — Low-Voltage Connections With or
Without Economizer or Two-Position Damper

Fig. 9 — Typical Field Control Wiring Raceway

12

Table 4 — Heat Anticipator Settings

UNIT

50TFQ

Heater
kW*
10.4, 16.0
24.8, 32.0
42.4, 50.0

208/230
Configuration
2-Stage
1-Stage
Stage 1 Stage 2
0.3
NA
NA
0.6
0.3
0.3
0.9
0.6
0.3

Heater
kW*
13.9, 16.5
27.8, 33.0
41.7, 50.0

UNIT VOLTAGE
460
Configuration
2-Stage
1-Stage
Stage 1 Stage 2

Heater
kW*

575
Configuration
2-Stage
1-Stage
Stage 1 Stage 2

0.3

NA

NA

17.0, 34.0

0.3

NA

NA

0.6

0.3

0.3

51.0

0.6

0.3

0.3

*kW is based on 240, 480, or 575 v.

CONVENIENCE OUTLET — An optional convenience outlet provides power for rooftop use. For maintenance personnel
safety, the convenience outlet power is off when the unit disconnect is off. Adjacent unit outlets may be used for service
tools. An optional “Hot Outlet” is available from the factory as
a special order item.
NOVAR CONTROLS — Optional Novar controls (ETM 3051)
are available for replacement or new construction jobs.
MANUAL OUTDOOR-AIR DAMPER — The outdoor-air
hood and screen are attached to the basepan at the bottom of
the unit (for shipping).
Assembly:
1. Determine the amount of ventilation required for building. Record the amount for use in Step 8.
2. Remove the filter access panel by raising the panel and
swinging it outward. The panel is now disengaged from
the track and can be removed. No tools are required to remove the filter access panel. Remove the outdoor-air
opening panel. Save the panels and screws. See Fig. 11.
3. Separate the hood and screen from the basepan by removing the screws and brackets securing them. Save all
screws and discard the brackets.
4. Replace the outdoor air opening panel.
5. Place the hood on the front of the outdoor air opening
panel. See Fig. 12 for hood details. Secure the top of the
hood with the 6 screws removed in Step 3. See Fig. 13.
6. Remove and save the 8 screws (4 on each side) from the
sides of the manual outdoor-air damper.
7. Align the screw holes on the hood with the screw holes
on the side of the manual outdoor-air damper. See Fig. 12
and 13. Secure the hood with the 8 screws from Step 6.
8. Adjust the minimum position setting of the damper blade
by adjusting the manual outdoor-air adjustment screws on
the front of the damper blade. See Fig. 11. Slide the blade
vertically until it is in the appropriate position determined
by Fig. 14. Tighten the screws.
9. Remove and save the screws currently on the sides of
hood. Insert the screen. Secure the screen to the hood
using the screws. See Fig. 13.
10. Replace the filter access panel. Ensure that the filter
access panel slides along the tracks and is securely
engaged.

Fig. 10 — Defrost Board

FILTER
ACCESS
PANEL
OUTDOOR AIR
OPENING
PANEL
SCREWS
(SIDE)

MANUAL
OUTDOOR-AIR
ADJUSTMENT
SCREWS

DAMPER
BLADE

Fig. 11 — Damper Panel with Manual
Outdoor-Air Damper Installed

13

PREMIERLINK™ CONTROL — The PremierLink controller is compatible with Carrier Comfort Network® (CCN)
devices. This control is designed to allow users the access and
ability to change factory-defined settings, thus expanding
the function of the standard unit control board. Carrier’s diagnostic standard tier display tools such as Navigator™ module
or Scrolling Marquee can be used with the PremierLink
controller.
The PremierLink controller (see Fig. 15A and 15B) requires
a Carrier electronic thermostat or a CCN connection for time
broadcast to initiate its internal timeclock. This is necessary for
broadcast of time of day functions (occupied/unoccupied). Refer to Fig. 16. The PremierLink control may be mounted in the
control panel or an area below the control panel.
NOTE: PremierLink versions 1.3 and later are shipped in Sensor mode. If used with a thermostat, the PremierLink control
must be configured to Thermostat mode.
The PremierLink control includes a supply-air temperature
sensor (SAT) and an outdoor-air temperature sensor (OAT) as
standard. An indoor-air quality (CO2) sensor can be added as
an option. Refer to Table 5 for sensor usage.
Install the Supply Air Temperature (SAT) Sensor — When
the unit is supplied with a factory-mounted PremierLink control, the supply-air temperature (SAT) sensor (33ZCSENSAT)
is factory-supplied and wired. The wiring is routed from the
PremierLink control over the control box, through a grommet,
into the fan section, down along the back side of the fan, and
along the fan deck over to the supply-air opening.
The SAT probe is wire-tied to the supply-air opening (on the
horizontal opening end) in its shipping position. Remove the
sensor for installation. Re-position the sensor for installation.
Re-position the sensor in the flange of the supply-air opening
or in the supply air duct (as required by local codes). Drill or
punch a 1/2-in. hole in the flange or duct. Use two fieldsupplied, self-drilling screws to secure the sensor probe in a
horizontal orientation.
NOTE: The sensor must be mounted in the discharge airstream
downstream of the cooling coil and any heating devices. Be
sure that the probe tip does not come in contact with any of the
unit or heat surfaces.
Outdoor Air Temperature (OAT) Sensor — When the unit is
supplied with a factory-mounted PremierLink control, the
outdoor-air temperature (OAT) sensor is factory-supplied and
wired.
Install the Indoor Air Quality (CO2) Sensor — Mount the
optional indoor air quality (CO2) sensor according to manufacturer specifications.
A separate field-supplied transformer must be used to power the CO2 sensor.
Wire the CO2 sensor to the COM and IAQI terminals of J5
on the PremierLink controller. Refer to the PremierLink Installation, Start-up, and Configuration Instructions for detailed
wiring and configuration information.

Fig. 12 — Outdoor-Air Hood Details

SCREW
HOLES
(TOP)

HOOD

HOOD
SCREEN
LOCATION
(SCREEN
NOT
SHOWN)

Fig. 13 — Optional Manual Outdoor-Air
Damper with Hood Attached

Fig. 14 — Outdoor Air Damper Position Setting
14

Table 5 — PremierLink™ Sensor Usage
APPLICATION
Dry Bulb
Temperature with
PremierLink™*
(PremierLink
requires 4-20 mA
Actuator)
Differential Dry Bulb
Temperature with
PremierLink*
(PremierLink
requires 4-20 mA
Actuator)
Single Enthalpy with
PremierLink*
(PremierLink
requires 4-20 mA
Actuator)
Differential Enthalpy
with PremierLink*
(PremierLink
requires 4-20 mA
Actuator)

OUTDOOR AIR
TEMPERATURE SENSOR

RETURN AIR
TEMPERATURE SENSOR

OUTDOOR AIR
ENTHALPY SENSOR

RETURN AIR
ENTHALPY SENSOR

Included —
HH79NZ017

—

—

—

Included —
HH79NZ017

Required —
33ZCT55SPT
or Equivalent

—

—

Included —
Not Used

—

Required —
HH57AC077

—

Included —
Not Used

—

Required —
HH57AC077

Required —
HH57AC078

*PremierLink control requires Supply Air Temperature sensor 33ZCSENSAT and
Outdoor Air Temperature Sensor HH79NZ017 — Included with factory-installed PremierLink control;
field-supplied and field-installed with field-installed PremierLink control.
NOTES:
1. CO2 Sensors (Optional):
33ZCSENCO2 — Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor.
33ZCASPCO2 — Aspirator box used for duct-mounted CO2 room sensor.
33ZCT55CO2 — Space temperature and CO2 room sensor with override.
33ZCT56CO2 — Space temperature and CO2 room sensor with override and set point.
2. All units include the following Standard Sensors:
Outdoor-Air Sensor — 50HJ540569 — Opens at 67 F, closes at 52 F, not adjustable.
Mixed-Air Sensor — HH97AZ001 — (PremierLink control requires Supply Air Temperature sensor 33ZCSENSAT
and Outdoor Air Temperature Sensor HH79NZ017)
Compressor Lockout Sensor — 50HJ540570 — Opens at 35 F, closes at 50 F.

Fig. 15A — PremierLink Controller

15

PREMIERLINK
CONTROL

HINGED
DOOR
PANEL
PREMIERLINK
COVER

Fig. 15B — PremierLink™ Controller (Installed)

BLK
RED

VIO

OAT

VIO

TB - 2

7

7

6

6

BRN

1

BLU

BRN
ORN

VIO

2

HK50AA039

BLU

PNK

J6
ANAL OG

SAT
PNK

BLK

BRN

YEL

10

10

8
2

RED
BLU
YEL
WHT

RED

3

BLK

4

BRN

5

RED

6

BRN

7

BLU

8

ORN

BRN
BLU
GRN

8
2

3
BLK

Space Temp./ Set
Point Adjustment

Indoor Air
Quality Sensor

YEL
BLU
WHT

3

4

Outdoor Air
Quality Sensor

4

1

1

5

5

9

9

12

12

J4
DISCRETE

BLU

11

J5
0 - 20 mA IN

BRN

11

PremierLink

PNK

Power Exhaust/Energy Recycler

PNK
J9
0-20 mA

J2
J1
PWR COMMS

GRA
GRA

TB - 3
ORN

RMTOCC

PNK

SR

+

1

PNK
GRN

GRA

WHT GRA

BRN
BLK

TB - 1
R
1

RED

GRA

FSD

3

BLU

2

SFS

4

WHT

3

Y2

5

PNK

4

W1

ORN

6

RED

5

W2

PNK

7

WHT

6

G

8

BLK

7

C

8

X

Y1

3

OUTDOOR AIR
ENTHALPY SENSOR

CCN
Comm.

BLK

Economi$er2
4 - 20mA

RED

BRN

S

+

RETURN AIR
ENTHALPY
SENSOR

COMMS
OAT
PWR
SAT

—
—
—
—

LEGEND
Communications
Outdoor Air Temperature Sensor
Power
Supply Air Temperature Sensor

RTU Terminal
Board

Fig. 16 — Typical PremierLink Controls Wiring
16

PNK

RED

YEL

GRAY
GRAY

ORN ORN

ORN
RED

2

CMPSAFE

TR1

RED
BRN

J8
Relays

GRA

TR

2

J7
PP/MP

ORN

WHT

Enthalpy Sensors and Control — The enthalpy control
(HH57AC077) is supplied as a field-installed accessory to be
used with the economizer damper control option. The outdoor
air enthalpy sensor is part of the enthalpy control. The separate
field-installed accessory return air enthalpy sensor
(HH57AC078) is required for differential enthalpy control.
NOTE: The enthalpy control must be set to the “D” setting for
differential enthalpy control to work properly.
The enthalpy control receives the indoor and return
enthalpy from the outdoor and return air enthalpy sensors and
provides a dry contact switch input to the PremierLink™
controller. Locate the controller in place of an existing economizer controller or near the actuator. The mounting plate may
not be needed if existing bracket is used.
A closed contact indicates that outside air is preferred to the
return air. An open contact indicates that the economizer
should remain at minimum position.
Outdoor Air Enthalpy Sensor/Enthalpy Controller
(HH57AC077) — To wire the outdoor air enthalpy sensor,
perform the following (see Fig. 17 and 18):
NOTE: The outdoor air sensor can be removed from the back
of the enthalpy controller and mounted remotely.
1. Use a 4-conductor, 18 or 20 AWG cable to connect the
enthalpy control to the PremierLink controller and power
transformer.
2. Connect the following 4 wires from the wire harness
located in rooftop unit to the enthalpy controller:
a. Connect the BRN wire to the 24 vac terminal (TR1)
on enthalpy control and to pin 1 on 12-pin harness.
b. Connect the RED wire to the 24 vac GND terminal
(TR) on enthalpy sensor and to pin 4 on 12-pin
harness.
c. Connect the GRAY/ORN wire to J4-2 on PremierLink controller and to terminal (3) on enthalpy
sensor.
d. Connect the GRAY/RED wire to J4-1 on PremierLink controller and to terminal (2) on enthalpy sensor.
NOTE: If installing in a Carrier rooftop, use the two gray wires
provided from the control section to the economizer to connect
PremierLink controller to terminals 2 and 3 on enthalpy sensor.
If NOT using Carrier equipment, wires may need to be field
supplied and installed.
Return Air Enthalpy Sensor — Mount the return-air enthalpy
sensor (HH57AC078) in the return-air duct. The return air
sensor is wired to the enthalpy controller (HH57AC077). The
outdoor enthalpy changeover set point is set at the controller.
To wire the return air enthalpy sensor, perform the following (see Fig. 17):
1. Use a 2-conductor, 18 or 20 AWG, twisted pair cable to
connect the return air enthalpy sensor to the enthalpy
controller.
2. At the enthalpy control remove the factory-installed
resistor from the (SR) and (+) terminals.
3. Connect the field-supplied RED wire to (+) spade
connector on the return air enthalpy sensor and the (SR+)
terminal on the enthalpy controller. Connect the BLK
wire to (S) spade connector on the return air enthalpy
sensor and the (SR) terminal on the enthalpy controller.

ENTHALPY CONTROLLER
A

B

TR
C
D SO

TR1

SR

+

+

RED
BRN
BLK
RED

S (RETURN AIR
+ ENTHALPY
SENSOR)

3
2
LED

1

S (OUTDOOR
AIR
+ ENTHALPY
SENSOR)

GRAY/ORN
GRAY/RED

WIRE HARNESS
IN UNIT

NOTES:
1. Remove factory-installed jumper across SR and + before connecting wires from return air sensor.
2. Switches shown in high outdoor air enthalpy state. Terminals 2
and 3 close on low outdoor air enthalpy relative to indoor air
enthalpy.
3. Remove sensor mounted on back of control and locate in outdoor airstream.

Fig. 17 — Outdoor and Return Air Sensor Wiring
Connections for Differential Enthalpy Control

HH57AC077
ENTHALPY
CONTROL AND
BRACKET OUTDOOR AIR
ENTHALPY
SENSOR

HH57AC078 ENTHALPY
SENSOR (USED WITH
ENTHALPY CONTROL
FOR DIFFERENTIAL
ENTHALPY OPERATION)

C7400
A1004

+

MOUNTING PLATE

Fig. 18 — Differential Enthalpy Control,
Sensor and Mounting Plate (33AMKITENT006)

17

OPTIONAL ECONOMI$ER IV AND ECONOMI$ER2 —
See Fig. 19 for EconoMi$er IV component locations. See
Fig. 20 for EconoMi$er2 component locations.
NOTE: These instructions are for installing the optional
EconoMi$er IV and EconoMi$er2 only. Refer to the accessory
EconoMi$er IV or EconoMi$er2 installation instructions when
field installing an EconoMi$er IV or EconoMi$er2 accessory.
1. To remove the existing unit filter access panel, raise the
panel and swing the bottom outward. The panel is now
disengaged from the track and can be removed. See
Fig. 21.
2. The box with the economizer hood components is
shipped in the compartment behind the economizer. The
EconoMi$er IV controller is mounted on top of the
EconoMi$er IV in the position shown in Fig. 19. The
optional EconoMi$er2 with 4 to 20 mA actuator signal
control does not include the EconoMi$er IV controller.
To remove the component box from its shipping position,
remove the screw holding the hood box bracket to the top
of the economizer. Slide the hood box out of the unit. See
Fig. 22.

4. Swing out indoor coil access panel and insert the hood
sides under the panel (hood top). Use the screws provided
to attach the hood sides to the hood top. Use screws provided to attach the hood sides to the unit. See Fig. 24.
5. Remove the shipping tape holding the economizer barometric relief damper in place.
FILTER ACCESS PANEL

IMPORTANT: If the power exhaust accessory is to be
installed on the unit, the hood shipped with the unit will not
be used and must be discarded. Save the aluminum filter
for use in the power exhaust hood assembly.

INDOOR COIL ACCESS PANEL

Fig. 21 — Typical Access Panel Locations

3. The indoor coil access panel will be used as the top of the
hood. Remove the screws along the sides and bottom of
the indoor coil access panel. See Fig. 23.

ECONOMI$ER IV
CONTROLLER
WIRING
HARNESS

B
Hood

ox

HOOD BOX
BRACKET

OUTSIDE AIR
TEMPERATURE SENSOR
LOW AMBIENT
SENSOR

ACTUATOR

Fig. 22 — Hood Box Removal
Fig. 19 — EconoMi$er IV Component Locations

OUTDOOR
AIR HOOD

ECONOMI$ER2
PLUG

SIDE
PANEL

HOOD
SHIPPING
BRACKET

CAULK
HERE

BAROMETRIC
RELIEF
DAMPER

INDOOR
COIL
ACCESS
PANEL

GEAR DRIVEN
DAMPER

Fig. 20 — EconoMi$er2 Component Locations

TOP
SIDE
PANEL
INDOOR
COIL
ACCESS
PANEL

Fig. 23 — Indoor Coil Access Panel Relocation
18

8. Caulk the ends of the joint between the unit top panel and
the hood top. See Fig. 23.
9. Replace the filter access panel.
10. Install all EconoMi$er IV accessories. EconoMi$er IV
wiring is shown in Fig. 26. EconoMi$er2 wiring is shown
in Fig. 27.
Barometric flow capacity is shown in Fig. 28. Outdoor air
leakage is shown in Fig. 29. Return air pressure drop is shown
in Fig. 30.

6. Insert the hood divider between the hood sides. See
Fig. 24 and 25. Secure hood divider with 2 screws on
each hood side. The hood divider is also used as the bottom filter rack for the aluminum filter.
7. Open the filter clips which are located underneath the
hood top. Insert the aluminum filter into the bottom filter
rack (hood divider). Push the filter into position past the
open filter clips. Close the filter clips to lock the filter into
place. See Fig. 25.

22 1/4”
TOP
PANEL
INDOOR COIL
ACCESS PANEL

LEFT
HOOD
SIDE

DIVIDER
SCREW

OUTSIDE
AIR

B
24 9/16”

HOOD
CLEANABLE
ALUMINUM
FILTER

40 3/8”

HOOD DIVIDER

FILTER

BAROMETRIC
RELIEF

Fig. 24 — Outdoor-Air Hood Construction

FILTER
CLIP

Fig. 25 — Filter Installation
FOR OCCUPANCY CONTROL
REPLACE JUMPER WITH
FIELD-SUPPLIED TIME CLOCK

LEGEND
DCV— Demand Controlled Ventilation
IAQ — Indoor Air Quality
LA — Low Ambient Lockout Device
OAT — Outdoor-Air Temperature
POT — Potentiometer
RAT — Return-Air Temperature

Potentiometer Defaults Settings:
Power Exhaust Middle
Minimum Pos.
Fully Closed
DCV Max.
Middle
DCV Set
Middle
Enthalpy
C Setting

NOTES:
1. 620 ohm, 1 watt 5% resistor should be removed only when using differential
enthalpy or dry bulb.
2. If a separate field-supplied 24 v transformer is used for the IAQ sensor power
supply, it cannot have the secondary of the transformer grounded.
3. For field-installed remote minimum position POT, remove black wire jumper
between P and P1 and set control minimum position POT. to the minimum
position.

Fig. 26 — EconoMi$er IV Wiring
19

BLACK

4
3
5

BLUE

2

500 OHM
RESISTOR

8
VIOLET

6

NOTE 1
PINK

7

RUN
RED

+

NOTE 3

1

YELLOW

10

50HJ540573
ACTUATOR
ASSEMBLY

OPTIONAL CO 2
SENSOR 4 - 20 mA
OUTPUT

11
9
WHITE

DIRECT DRIVE
ACTUATOR

12

ECONOMISER2 PLUG
NOTES:
1. Switch on actuator must be in run position for economizer to operate.
2. PremierLink™ control requires that the standard 50HJ540569 outside-air sensor be replaced by either the CROASENR001A00 dry bulb sensor or HH57A077
enthalpy sensor.
3. 50HJ540573 actuator consists of the 50HJ540567 actuator and a harness with 500-ohm resistor.

FLOW IN CUBIC FEET PER MINUTE (cfm)

FLOW IN CUBIC FEET PER MINUTE (cfm)

Fig. 27 — EconoMi$er2 with 4 to 20 mA Control Wiring

2500
2000
1500
1000
500
0
0.15

0.05

0.25

STATIC PRESSURE (in. wg)

6000
5000
4000
3000
2000
1000
0
0.05

0.10

0.15

0.20

0.25

0.30

0.35

STATIC PRESSURE (in. wg)

FLOW IN CUBIC FEET PER MINUTE (cfm)

Fig. 28 — Barometric Flow Capacity

Fig. 30 — Return-Air Pressure Drop

30
25
20
15
10
5
0
0.13

0.20 0.22

0.25

0.30 0.35 0.40

0.45

0.50

STATIC PRESSURE (in. wg)

Fig. 29 — Outdoor-Air Damper Leakage

20

Table 7 — EconoMi$er IV Sensor Usage
APPLICATION
Outdoor Air
Dry Bulb
Differential
Dry Bulb
Single Enthalpy
Differential
Enthalpy
CO2 for DCV
Control using a
Wall-Mounted
CO2 Sensor
CO2 for DCV
Control using a
Duct-Mounted
CO2 Sensor

Table 6 — Supply Air Sensor Temperature/
Resistance Values
TEMPERATURE (F)
–58
–40
–22
–4
14
32
50
68
77
86
104
122
140
158
176
185
194
212
230
248
257
266
284
302

ECONOMI$ER IV WITH OUTDOOR AIR
DRY BULB SENSOR
Accessories Required
None. The outdoor air dry bulb sensor
is factory installed.
CRTEMPSN002A00*
HH57AC078
HH57AC078
and
CRENTDIF004A00*
33ZCSENCO2
33ZCSENCO2†
and
33ZCASPCO2**

OR

ECONOMI$ER IV STANDARD SENSORS
Outdoor Air Temperature (OAT) Sensor — The outdoor air
temperature sensor (HH57AC074) is a 10 to 20 mA device
used to measure the outdoor-air temperature. The outdoor-air
temperature is used to determine when the EconoMi$er IV can
be used for free cooling. The sensor is factory-installed on the
EconoMi$er IV in the outdoor airstream. See Fig. 19. The operating range of temperature measurement is 40 to 100 F.
Supply Air Temperature (SAT) Sensor — The supply air
temperature sensor is a 3 K thermistor located at the inlet of the
indoor fan. See Fig. 31. This sensor is factory installed. The operating range of temperature measurement is 0° to 158 F. See
Table 6 for sensor temperature/resistance values.
The temperature sensor looks like an eyelet terminal with
wires running to it. The sensor is located in the “crimp end”
and is sealed from moisture.

CRCBDIOX005A00††

*CRENTDIF004A00 and CRTEMPSN002A00 accessories are
used on many different base units. As such, these kits may contain parts that will not be needed for installation.
†33ZCSENCO2 is an accessory CO2 sensor.
**33ZCASPCO2 is an accessory aspirator box required for ductmounted applications.
††CRCBDIOX005A00 is an accessory that contains both
33ZCSENCO2 and 33ZCASPCO2 accessories.

RESISTANCE (ohms)
200,250
100,680
53,010
29,091
16,590
9,795
5,970
3,747
3,000
2,416
1,597
1,080
746
525
376
321
274
203
153
116
102
89
70
55

Outdoor Dry Bulb Changeover — The standard controller is
shipped from the factory configured for outdoor dry bulb
changeover control. The outdoor air and supply air temperature
sensors are included as standard. For this control mode, the
outdoor temperature is compared to an adjustable set point
selected on the control. If the outdoor-air temperature is above
the set point, the EconoMi$er IV will adjust the outdoor air
dampers to minimum position. If the outdoor-air temperature is
below the set point, the position of the outdoor air dampers will
be controlled to provide free cooling using outdoor air. When
in this mode, the LED next to the free cooling set point potentiometer will be on. The changeover temperature set point is
controlled by the free cooling set point potentiometer located
on the control. See Fig. 32. The scale on the potentiometer is A,
B, C, and D. See Fig. 33 for the corresponding temperature
changeover values.

Outdoor Air Lockout Sensor — The Economi$er IV is
equipped with an ambient temperature lockout switch located
in the outdoor air stream which is used to lockout the compressors below a 42 F ambient temperature. See Fig. 19.
ECONOMI$ER IV CONTROL MODES

SUPPLY AIR
TEMPERATURE
SENSOR
MOUNTING
LOCATION

IMPORTANT: The optional EconoMi$er2 does not
include a controller. The EconoMi$er2 is operated by a 4 to
20 mA signal from an existing field-supplied controller
(such as PremierLink™ control). See Fig. 27 for wiring
information.

SUPPLY AIR
TEMPERATURE
SENSOR

Determine the EconoMi$er IV control mode before set up of
the control. Some modes of operation may require different sensors. Refer to Table 7. The EconoMi$er IV is supplied from the
factory with a supply air temperature sensor and an outdoor air
temperature sensor. This allows for operation of the
EconoMi$er IV with outdoor air dry bulb changeover control.
Additional accessories can be added to allow for different types
of changeover control and operation of the EconoMi$er IV and
unit.

Fig. 31 — Supply Air Sensor Location

21

Differential Enthalpy Control — For differential enthalpy
control, the EconoMi$er IV controller uses two enthalpy sensors (HH57AC078 and CRENTDIF004A00), one in the outside air and one in the return air duct. The EconoMi$er IV
controller compares the outdoor air enthalpy to the return air
enthalpy to determine EconoMi$er IV use. The controller
selects the lower enthalpy air (return or outdoor) for cooling.
For example, when the outdoor air has a lower enthalpy than
the return air, the EconoMi$er IV opens to bring in outdoor air
for free cooling.
Replace the standard outside air dry bulb temperature sensor with the accessory enthalpy sensor in the same mounting
location. See Fig. 19. Mount the return air enthalpy sensor in
the return air duct. See Fig. 34. Wiring is provided in the
EconoMi$er IV wiring harness. See Fig. 26. The outdoor enthalpy changeover set point is set with the outdoor enthalpy set
point potentiometer on the EconoMi$er IV controller. When
using this mode of changeover control, turn the enthalpy setpoint potentiometer fully clockwise to the D setting.
Indoor Air Quality (IAQ) Sensor Input — The IAQ input
can be used for demand control ventilation control based on the
level of CO2 measured in the space or return air duct.
Mount the accessory IAQ sensor according to manufacturer
specifications. The IAQ sensor should be wired to the AQ and
AQ1 terminals of the controller. Adjust the DCV potentiometers to correspond to the DCV voltage output of the indoor air
quality sensor at the user-determined set point. See Fig. 37.
If a separate field-supplied transformer is used to power the
IAQ sensor, the sensor must not be grounded or the
EconoMi$er IV control board will be damaged.

Fig. 32 — EconoMi$er IV Controller Potentiometer
and LED Locations

19
LED ON

18

D

17

LED OFF

16
mA

15
14

LED ON

C
LED OFF

13
12

LED ON

B
LED OFF

LED ON

A

11
10

ECONOMI$ER IV
CONTROLLER

LED OFF

9
40

45

50

55

60
65 70 75 80
DEGREES FAHRENHEIT

85

90

95

100

ECONOMI$ER IV

Fig. 33 — Outside Air Temperature
Changeover Set Points
GROMMET

Differential Dry Bulb Control — For differential dry bulb
control the standard outdoor dry bulb sensor is used in conjunction with an additional accessory dry bulb sensor (part number
CRTEMPSN002A00). The accessory sensor must be mounted
in the return airstream. See Fig. 34. Wiring is provided in the
EconoMi$er IV wiring harness. See Fig. 26.
In this mode of operation, the outdoor-air temperature is
compared to the return-air temperature and the lower temperature airstream is used for cooling. When using this mode of
changeover control, turn the enthalpy set point potentiometer
fully clockwise to the D setting. See Fig. 32.
Outdoor Enthalpy Changeover — For enthalpy control, accessory enthalpy sensor (part number HH57AC078) is required. Replace the standard outdoor dry bulb temperature sensor with the accessory enthalpy sensor in the same mounting
location. See Fig. 19. When the outdoor air enthalpy rises
above the outdoor enthalpy changeover set point, the outdoorair damper moves to its minimum position. The outdoor
enthalpy changeover set point is set with the outdoor enthalpy
set point potentiometer on the EconoMi$er IV controller. The
set points are A, B, C, and D. See Fig. 35. The factory-installed
620-ohm jumper must be in place across terminals SR and SR+
on the EconoMi$er IV controller. See Fig. 19 and 36.

RETURN AIR
SENSOR

RETURN DUCT
(FIELD-PROVIDED)

Fig. 34 — Return Air Temperature or Enthalpy
Sensor Mounting Location

22

46

85
90
95 100 105 110
(29) (32) (35) (38) (41) (43)

44

CONTROL CONTROL POINT
CURVE
APPROX. °F (°C)
AT 50% RH
73 (23)
A
70 (21)
B
67 (19)
C
63 (17)
D

)
(%
UM
ID

IT Y

38

75
(24)

EH
LA
TIV

32

RE

30

70
(21)

20

70

80

50

60
(16)

A

40

22

60

24

65
(18)

10
0
90

8

EN
TH
AL
26 PY
—
2 BT

U

PE
R

34

PO
UN
D

36

DR
Y

AI
R

40

42

80
(27)

16
14

50
(10)

12

45
(7)

30

18

55
(13) B

C

20

D

40
(4)

10

35
(2)

B A
D C
35
(2)

40
(4)

45
(7)

HIGH LIMIT
CURVE

55
60
65
70
75
80
85
90
95 100 105 110
(13) (16) (18) (21) (24) (27) (29) (32) (35) (38) (41) (43)

50
(10)

APPROXIMATE DRY BULB TEMPERATURE— °F (°C)

Fig. 35 — Enthalpy Changeover Set Points

CO2 SENSOR MAX RANGE SETTING
EXH

N1

P

Min
Pos

T1

DCV
2V

SO+

SR+
SR

_

+

Max
10V

1

2

5

DCV

AQ

SO

24 Vac
COM

Open

T

AQ1

24
Vac
HOT

6000

Set
10V

2V
EXH

P1

TR1

RANGE CONFIGURATION (ppm)

N

TR

2V

DCV
Set
10V

Free
Cool
B

C

A

D

3

4

EF

EF1

5000
4000
800 ppm
900 ppm
1000 ppm
1100 ppm

3000
2000
1000
0
2

3

4

5

6

7

8

DAMPER VOLTAGE FOR MAX VENTILATION RATE

Fig. 37 — CO2 Sensor Maximum Range Setting

Fig. 36 — EconoMi$er IV Control

23

Damper Movement — Damper movement from full open to
full closed (or vice versa) takes 21/2 minutes.
Thermostats — The EconoMi$er IV control works with conventional thermostats that have a Y1 (cool stage 1), Y2 (cool
stage 2), W1 (heat stage 1), W2 (heat stage 2), and G (fan). The
EconoMi$er IV control does not support space temperature
sensors. Connections are made at the thermostat terminal connection board located in the main control box.
Occupancy Control — The factory default configuration for
the EconoMi$er IV control is occupied mode. Occupied status
is provided by the black jumper from terminal TR to terminal
N. When unoccupied mode is desired, install a field-supplied
timeclock function in place of the jumper between TR and N.
See Fig. 26. When the timeclock contacts are closed, the
EconoMi$er IV control will be in occupied mode. When the
timeclock contacts are open (removing the 24-v signal from
terminal N), the EconoMi$er IV will be in unoccupied mode.
Demand Controlled Ventilation (DCV) — When using the
EconoMi$er IV for demand controlled ventilation, there are
some equipment selection criteria which should be considered.
When selecting the heat capacity and cool capacity of the
equipment, the maximum ventilation rate must be evaluated for
design conditions. The maximum damper position must be calculated to provide the desired fresh air.
Typically the maximum ventilation rate will be about 5 to
10% more than the typical cfm required per person, using
normal outside air design criteria.
A proportional anticipatory strategy should be taken with
the following conditions: a zone with a large area, varied occupancy, and equipment that cannot exceed the required ventilation rate at design conditions. Exceeding the required ventilation rate means the equipment can condition air at a maximum
ventilation rate that is greater than the required ventilation rate
for maximum occupancy. A proportional-anticipatory strategy
will cause the fresh air supplied to increase as the room CO2
level increases even though the CO2 set point has not been
reached. By the time the CO2 level reaches the set point, the
damper will be at maximum ventilation and should maintain
the set point.
In order to have the CO2 sensor control the economizer
damper in this manner, first determine the damper voltage output for minimum or base ventilation. Base ventilation is the
ventilation required to remove contaminants during unoccupied periods. The following equation may be used to determine
the percent of outside-air entering the building for a given
damper position. For best results there should be at least a
10 degree difference in outside and return-air temperatures.
OA
RA
(TO x
) + (TR x
) = TM
100
100
TO = Outdoor-Air Temperature
OA = Percent of Outdoor Air
TR = Return-Air Temperature
RA = Percent of Return Air
TM = Mixed-Air Temperature
Once base ventilation has been determined, set the minimum damper position potentiometer to the correct position.
The same equation can be used to determine the occupied or
maximum ventilation rate to the building. For example, an output of 3.6 volts to the actuator provides a base ventilation rate
of 5% and an output of 6.7 volts provides the maximum ventilation rate of 20% (or base plus 15 cfm per person). Use Fig. 37
to determine the maximum setting of the CO2 sensor. For example, a 1100 ppm set point relates to a 15 cfm per person design. Use the 1100 ppm curve on Fig. 37 to find the point when
the CO2 sensor output will be 6.7 volts. Line up the point on the
graph with the left side of the chart to determine that the range
configuration for the CO2 sensor should be 1800 ppm. The
EconoMi$er IV controller will output the 6.7 volts from the

Exhaust Set Point Adjustment — The exhaust set point will
determine when the exhaust fan runs based on damper position
(if accessory power exhaust is installed). The set point is modified with the Exhaust Fan Set Point (EXH SET) potentiometer.
See Fig. 32. The set point represents the damper position above
which the exhaust fans will be turned on. When there is a call
for exhaust, the EconoMi$er IV controller provides a 45 ± 15
second delay before exhaust fan activation to allow the dampers to open. This delay allows the damper to reach the appropriate position to avoid unnecessary fan overload.
Minimum Position Control — There is a minimum damper
position potentiometer on the EconoMi$er IV controller. See
Fig. 32. The minimum damper position maintains the minimum airflow into the building during the occupied period.
When using demand ventilation, the minimum damper position represents the minimum ventilation position for VOC
(volatile organic compound) ventilation requirements. The
maximum demand ventilation position is used for fully occupied ventilation.
When demand ventilation control is not being used, the
minimum position potentiometer should be used to set the occupied ventilation position. The maximum demand ventilation
position should be turned fully clockwise.
Adjust the minimum position potentiometer to allow the
minimum amount of outdoor air, as required by local codes, to
enter the building. Make minimum position adjustments with
at least 10 F temperature difference between the outdoor and
return-air temperatures.
To determine the minimum position setting, perform the
following procedure:
1. Calculate the appropriate mixed air temperature using the
following formula:
OA
RA
(TO x
) + (TR x
) = TM
100
100
TO = Outdoor-Air Temperature
OA = Percent of Outdoor Air
TR = Return-Air Temperature
RA = Percent of Return Air
TM = Mixed-Air Temperature
As an example, if local codes require 10% outdoor air
during occupied conditions, outdoor-air temperature is
60 F, and return-air temperature is 75 F.
(60 x .10) + (75 x .90) = 73.5 F
2. Disconnect the supply air sensor from terminals T and
T1.
3. Ensure that the factory-installed jumper is in place across
terminals P and P1. If remote damper positioning is being
used, make sure that the terminals are wired according to
Fig. 26 and that the minimum position potentiometer is
turned fully clockwise.
4. Connect 24 vac across terminals TR and TR1.
5. Carefully adjust the minimum position potentiometer
until the measured mixed-air temperature matches the
calculated value.
6. Reconnect the supply air sensor to terminals T and T1.
Remote control of the EconoMi$er IV damper is desirable
when requiring additional temporary ventilation. If a
field-supplied remote potentiometer (Honeywell part number
S963B1128) is wired to the EconoMi$er IV controller, the
minimum position of the damper can be controlled from a remote location.
To control the minimum damper position remotely, remove
the factory-installed jumper on the P and P1 terminals on the
EconoMi$er IV controller. Wire the field-supplied potentiometer to the P and P1 terminals on the EconoMi$er IV controller.
See Fig. 36.
24

building when the enthalpy is high. In most cases, the normal
heating and cooling processes are more than adequate to remove the humidity loads for most commercial applications.
If normal rooftop heating and cooling operation is not adequate for the outdoor humidity level, an energy recovery unit
and/or a dehumidification option should be considered.
Step 7 — Adjust Indoor-Fan Speed — Adjust the
indoor-fan speed to meet jobsite conditions.
For units with electric heat, required minimum cfm is 2250
for 50TFQ008, 2550 for 50TFQ009 and 3000 for 50TFQ012
with the following exceptions:

CO2 sensor to the actuator when the CO2 concentration in the
space is at 1100 ppm. The DCV set point may be left at 2 volts
since the CO2 sensor voltage will be ignored by the
EconoMi$er IV controller until it rises above the 3.6 volt setting of the minimum position potentiometer.
Once the fully occupied damper position has been determined, set the maximum damper demand control ventilation
potentiometer to this position. Do not set to the maximum position as this can result in over-ventilation to the space and potential high-humidity levels.
CO 2 Sensor Configuration — The CO2 sensor has preset
standard voltage settings that can be selected anytime after the
sensor is powered up. See Table 8.
Use setting 1 or 2 for Carrier equipment. See Table 8.
1. Press Clear and Mode buttons. Hold at least 5 seconds
until the sensor enters the Edit mode.
2. Press Mode twice. The STDSET Menu will appear.
3. Use the Up/Down button to select the preset number. See
Table 8.
4. Press Enter to lock in the selection.
5. Press Mode to exit and resume normal operation.
The custom settings of the CO2 sensor can be changed anytime after the sensor is energized. Follow the steps below to
change the non-standard settings:
1. Press Clear and Mode buttons. Hold at least 5 seconds
until the sensor enters the Edit mode.
2. Press Mode twice. The STDSET Menu will appear.
3. Use the Up/Down button to toggle to the NONSTD menu
and press Enter.
4. Use the Up/Down button to toggle through each of the
nine variables, starting with Altitude, until the desired setting is reached.
5. Press Mode to move through the variables.
6. Press Enter to lock in the selection, then press Mode to
continue to the next variable.
Dehumidification of Fresh Air with DCV Control — Information from ASHRAE indicates that the largest humidity load
on any zone is the fresh air introduced. For some applications,
a device such as a 62AQ energy recovery unit is added to reduce the moisture content of the fresh air being brought into the

UNIT

50TFQ012

UNIT
VOLTAGE

HEATER
kW

208/230
208/230

42.4
50.0

460

50.0

575

17.0
51.0

UNIT
CONFIGURATION
Horizontal
Horizontal
Horizontal or
Vertical

REQUIRED
MINIMUM
CFM
3200
3200

Horizontal or
Vertical

2800
2350

3200

Table 9 shows indoor-fan motor data. Table 10 shows fan
rpm at motor pulley settings for standard and alternate motors.
Tables 11A and 11B show static pressure for accessories. Refer
to Tables 12-27 to determine fan speed settings. Fan motor
pulleys are factory set for speed shown in Table 1.
To change fan speeds:
1. Shut off the unit power supply and tag disconnect.
2. Loosen the belt by loosening the fan motor mounting
nuts. See Fig. 38 and 39.
3. Loosen the movable pulley flange setscrew (see Fig. 40).
4. Screw the movable flange toward the fixed flange to
increase speed or away from the fixed flange to decrease
speed. Increasing the fan speed increases the load on the
motor. Do not exceed the maximum speed specified in
Table 1.
5. Set the movable flange at nearest keyway of the pulley
hub and tighten the setscrew. (See Table 1 for speed
change for each full turn of the pulley flange.)

Table 8 — CO2 Sensor Standard Settings
OUTPUT

VENTILATION
RATE
(cfm/Person)

Proportional

Any

Proportional

Any

3

Exponential

Any

4

Proportional

15

Proportional

20

6

Exponential

15

7

Exponential

20

SETTING

EQUIPMENT

1
2

Interface w/Standard
Building Control System

5
Economizer

8

Health & Safety

Proportional

—

9

Parking/Air Intakes/
Loading Docks

Proportional

—

ANALOG
OUTPUT
0-10V
4-20 mA
2-10V
7-20 mA
0-10V
4-20 mA
0-10V
4-20 mA
0-10V
4-20 mA
0-10V
4-20 mA
0-10V
4-20 mA
0-10V
4-20 mA
0-10V
4-20 mA

LEGEND
ppm — Parts Per Million

25

CO2
CONTROL RANGE
(ppm)

OPTIONAL
RELAY SETPOINT
(ppm)

RELAY
HYSTERESIS
(ppm)

0-2000

1000

50

0-2000

1000

50

0-2000

1100

50

0-1100

1100

50

0- 900

900

50

0-1100

1100

50

0- 900

900

50

0-9999

5000

500

0-2000

700

50

To align the fan and motor pulleys:
1. Loosen the fan pulley setscrews.
2. Slide the fan pulley along the fan shaft.
3. Make angular alignment by loosening the motor from the
mounting plate.
To adjust belt tension:
1. Loosen the fan motor mounting nuts.
2. Sizes 008 and 009 — Slide the motor mounting plate
away from the fan scroll for proper belt tension (1/2-in.
deflection with 5 to 10 lb of force) and tighten the mounting nuts (see Fig. 38).
Size 012 — Slide the motor mounting plate downward to
tighten belt tension (1/2-in. deflection with 5 to 10 lb of
force). Secure the motor mounting plate nuts. See Fig. 39.
3. Adjust the bolt and nut on the mounting plate to secure
the motor in fixed position.

Fig. 39 — Typical Belt-Drive Motor Mounting for
Size 012

MOTOR MOUNTING
PLATE NUTS

Fig. 38 — Typical Belt-Drive Motor Mounting for
Size 008 and 009

Fig. 40 — Indoor-Fan Pulley Adjustment

Table 9 — Fan Motor Performance
UNIT
50TFQ

INDOOR-FAN
MOTOR
Standard,
Alternate

008
High Static

UNIT
VOLTAGE
208/230
460
575
208/230
460
575

MAXIMUM ACCEPTABLE
CONTINUOUS BHP*

MAXIMUM ACCEPTABLE
OPERATING WATTS

2.40

2120

3.70

3313

2.40

2120

3.70

3313

2.40

2120

2.90

2615

5.25

4400

208/230
Standard
009
High Static

Standard

012

Alternate

High Static

460
575
208/230
460
575
208/230
460
575
208/230
460
575
208/230
460
575

LEGEND
BHP — Brake Horsepower
*Extensive motor and electrical testing on these units ensures that the full horsepower range of the
motors can be utilized with confidence. Using fan motors up to the horsepower ratings shown in
this table will not result in nuisance tripping or premature motor failure. Unit warranty will not be
affected.

26

MAXIMUM
AMP DRAW
6.0
3.0
3.0
11.7
5.5
5.5
6.0
3.0
3.0
11.7
5.5
5.5
6.0
3.0
3.0
8.6
3.9
3.9
17.3
8.5
8.5

Table 10 — Fan Rpm at Motor Pulley Settings*
UNIT
50TFQ
008†
008**
008††
009†
009††
012†
012**
012††

0
840
935
1080
935
1080
935
1085
1130

1/
2

815
910
1025
910
1025
910
1060
1112

1
790
885
1007
885
1007
885
1035
1087

11 / 2
765
860
988
860
988
860
1010
1062

2
740
835
970
835
970
835
985
1037

MOTOR PULLEY TURNS OPEN
21 / 2
3
31 / 2
715
690
665
810
785
760
952
933
915
810
785
760
952
933
915
810
785
760
960
935
910
1012
987
962

*Approximate fan rpm shown.
†Indicates standard motor and drive package.

4
635
735
897
735
897
735
885
937

41/2
615
710
878
710
878
710
860
912

51/2
—
—
—
—
—
—
—
862

5
590
685
860
685
860
685
835
887

6
—
—
—
—
—
—
—
830

**Indicates alternate drive package only.
††Indicates high-static motor and drive package.

Table 11A — Electric Heater Static Pressure* (in. wg) — 50TFQ008-012
COMPONENT
1 Heater Module
2 Heater Modules

CFM
2250
0.02
0.03

2500
0.03
0.05

3000
0.05
0.07

3500
0.07
0.09

4000
0.08
0.12

4500
0.10
0.14

5000
0.12
0.16

5500
0.14
0.19

6000
0.16
0.21

6250
0.17
0.20

*The static pressure must be added to external static pressure. The sum and the evaporator
entering-air cfm should then be used in conjunction with the Fan Performance tables to determine blower rpm and watts.

Table 11B — EconoMi$er IV and EconoMi$er2 Static Pressure* (in. wg) — 50TFQ008-012
CFM
2250 2500 2750 3000 3250 3500 3750 4000 4250 4500 4750 5000 5250 6250
Vertical EconoMi$er IV and EconoMi$er2
0.06 0.075 0.09 0.115 0.13 0.15 0.17 0.195 0.22 0.25 0.285 0.325 0.36 —
Horizontal EconoMi$er IV and EconoMi$er2
—
0.1 0.125 0.15 0.18 0.21 0.25 0.275 0.3 0.34 0.388
—
—
—
COMPONENT

*The static pressure must be added to external static pressure. The sum and the outdoor
entering-air cfm should then be used in conjunction with the Fan Performance tables to
determine blower rpm and watts.

27

Table 12 — Fan Performance, 50TFQ008 — Vertical Discharge Units; Standard Motor and Drive*
AIRFLOW
(Cfm)
2250
2300
2400
2500
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
AIRFLOW
(Cfm)
2250
2300
2400
2500
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750

Rpm
511
519
534
550
557
565
581
597
613
629
646
662
679
695
712
729
746
754

0.2
Bhp
0.58
0.61
0.68
0.75
0.79
0.83
0.91
1.00
1.09
1.20
1.30
1.42
1.54
1.67
1.81
1.95
2.10
2.18

Rpm
831
836
846
856
862
867
878
889
900
912
—
—
—
—
—
—
—
—

1.2
Bhp
1.53
1.57
1.67
1.77
1.82
1.87
1.99
2.11
2.23
2.36
—
—
—
—
—
—
—
—

Watts
538
567
630
698
733
770
848
932
1020
1115
1217
1324
1438
1558
1686
1820
1962
2036

Watts
1423
1465
1554
1647
1697
1747
1852
1963
2080
2204
—
—
—
—
—
—
—
—

Rpm
591
597
611
624
631
638
652
667
681
696
711
726
741
756
772
787
803
—

Rpm
880
885
895
905
910
915
925
936
—
—
—
—
—
—
—
—
—
—

0.4
Bhp
0.75
0.78
0.86
0.93
0.98
1.02
1.11
1.21
1.31
1.42
1.53
1.65
1.78
1.92
2.06
2.21
2.37
—

1.4
Bhp
1.74
1.79
1.89
2.00
2.05
2.11
2.23
2.35
—
—
—
—
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Watts Rpm
Bhp
Watts Rpm
697
660
0.93
864
722
729
666
0.97
900
727
798
678
1.04
974
739
872
690
1.13
1053
750
910
697
1.17
1095
756
950
703
1.22
1138
762
1034
716
1.32
1228
774
1124
729
1.42
1323
786
1220
743
1.53
1425
799
1321
756
1.64
1532
812
1428
770
1.76
1645
825
1542
784
1.89
1765
838
1663
798
2.03
1892
851
1790
812
2.17
2025
—
1923
827
2.32
2165
—
2065
—
—
—
—
2213
—
—
—
—
—
—
—
—
—

0.8
Bhp
1.12
1.16
1.24
1.33
1.38
1.43
1.53
1.64
1.75
1.88
2.00
2.14
2.28
—
—
—
—
—

Watts
1041
1079
1158
1243
1287
1333
1428
1529
1636
1749
1869
1994
2126
—
—
—
—
—

Rpm
779
784
794
805
811
816
828
839
851
863
875
888
—
—
—
—
—
—

1.0
Bhp
1.32
1.36
1.45
1.55
1.60
1.65
1.75
1.87
1.99
2.12
2.25
2.39
—
—
—
—
—
—

Watts
1228
1268
1352
1441
1488
1536
1636
1742
1855
1973
2098
2229
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Watts Rpm
Bhp
Watts
Rpm
1627
927
1.97
1840
971
1671
931
2.02
1886
975
1764
941
2.13
1982
984
1862
950
2.24
2085
—
1913
955
2.29
2138
—
1966
960
2.35
2193
—
2076
—
—
—
—
2192
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.8
Bhp
2.21
2.26
2.37
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
2061
2109
2209
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Rpm
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

2.0
Bhp
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Refer to page 43 General Fan Performance Notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 2.40.

LEGEND
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 590 to 840 rpm. All other rpms require fieldsupplied drive.

28

Table 13 — Fan Performance, 50TFQ008 — Vertical Discharge Units; Alternate Motor and Drive*
AIRFLOW
(Cfm)
2250
2300
2400
2500
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750

AIRFLOW
(Cfm)
2250
2300
2400
2500
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750

Rpm
511
519
534
550
557
565
581
597
613
629
646
662
679
695
712
729
746
754

0.2
Bhp
0.58
0.61
0.68
0.75
0.79
0.83
0.91
1.00
1.09
1.20
1.30
1.42
1.54
1.67
1.81
1.95
2.10
2.18

Rpm
831
836
846
856
862
867
878
889
900
912
—
—
—
—
—
—
—
—

1.2
Bhp
1.53
1.57
1.67
1.77
1.82
1.87
1.99
2.11
2.23
2.36
—
—
—
—
—
—
—
—

Watts
538
567
630
698
733
770
848
932
1020
1115
1217
1324
1438
1558
1686
1820
1962
2036

Watts
1423
1465
1554
1647
1697
1747
1852
1963
2080
2204
—
—
—
—
—
—
—
—

Rpm
591
597
611
624
631
638
652
667
681
696
711
726
741
756
772
787
803
—

Rpm
880
885
895
905
910
915
925
936
—
—
—
—
—
—
—
—
—
—

0.4
Bhp
0.75
0.78
0.86
0.93
0.98
1.02
1.11
1.21
1.31
1.42
1.53
1.65
1.78
1.92
2.06
2.21
2.37
—

1.4
Bhp
1.74
1.79
1.89
2.00
2.05
2.11
2.23
2.35
—
—
—
—
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Watts Rpm
Bhp
Watts Rpm
697
660
0.93
864
722
729
666
0.97
900
727
798
678
1.04
974
739
872
690
1.13
1053
750
910
697
1.17
1095
756
950
703
1.22
1138
762
1034
716
1.32
1228
774
1124
729
1.42
1323
786
1220
743
1.53
1425
799
1321
756
1.64
1532
812
1428
770
1.76
1645
825
1542
784
1.89
1765
838
1663
798
2.03
1892
851
1790
812
2.17
2025
—
1923
827
2.32
2165
—
2065
—
—
—
—
2213
—
—
—
—
—
—
—
—
—

0.8
Bhp
1.12
1.16
1.24
1.33
1.38
1.43
1.53
1.64
1.75
1.88
2.00
2.14
2.28
—
—
—
—
—

Watts
1041
1079
1158
1243
1287
1333
1428
1529
1636
1749
1869
1994
2126
—
—
—
—
—

Rpm
779
784
794
805
811
816
828
839
851
863
875
888
—
—
—
—
—
—

1.0
Bhp
1.32
1.36
1.45
1.55
1.60
1.65
1.75
1.87
1.99
2.12
2.25
2.39
—
—
—
—
—
—

Watts
1228
1268
1352
1441
1488
1536
1636
1742
1855
1973
2098
2229
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Watts Rpm
Bhp
Watts
Rpm
1627
927
1.97
1840
971
1671
931
2.02
1886
975
1764
941
2.13
1982
984
1862
950
2.24
2085
—
1913
955
2.29
2138
—
1966
960
2.35
2193
—
2076
—
—
—
—
2192
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.8
Bhp
2.21
2.26
2.37
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
2061
2109
2209
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Rpm
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

2.0
Bhp
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Refer to page 43 General Fan Performance Notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 2.40.

LEGEND
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 685 to 935 rpm. All other rpms require fieldsupplied drive.

29

Table 14 — Fan Performance, 50TFQ008 — Vertical Discharge Units; High-Static Motor and Drive*
AIRFLOW
(Cfm)
2250
2300
2400
2500
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750

AIRFLOW
(Cfm)
2250
2300
2400
2500
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750

Rpm
511
519
534
550
557
565
581
597
613
629
646
662
679
695
712
729
746
754

0.2
Bhp
0.58
0.61
0.68
0.75
0.79
0.83
0.91
1.00
1.09
1.20
1.30
1.42
1.54
1.67
1.81
1.95
2.10
2.18

Rpm
831
836
846
856
862
867
878
889
900
912
923
935
947
960
972
985
997
1004

1.2
Bhp
1.53
1.57
1.67
1.77
1.82
1.87
1.99
2.11
2.23
2.36
2.50
2.65
2.80
2.96
3.13
3.31
3.49
3.59

Watts
538
567
630
698
733
770
848
932
1020
1115
1217
1324
1438
1558
1686
1820
1962
2036

Watts
1423
1465
1554
1647
1697
1747
1852
1963
2080
2204
2334
2471
2613
2764
2921
3086
3259
3347

Rpm
591
597
611
624
631
638
652
667
681
696
711
726
741
756
772
787
803
811

Rpm
880
885
895
905
910
915
925
936
946
957
969
980
992
1003
1015
1028
—
—

0.4
Bhp
0.75
0.78
0.86
0.93
0.98
1.02
1.11
1.21
1.31
1.42
1.53
1.65
1.78
1.92
2.06
2.21
2.37
2.46

1.4
Bhp
1.74
1.79
1.89
2.00
2.05
2.11
2.23
2.35
2.48
2.62
2.76
2.92
3.07
3.24
3.42
3.60
—
—

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Watts Rpm
Bhp
Watts Rpm
697
660
0.93
864
722
729
666
0.97
900
727
798
678
1.04
974
739
872
690
1.13
1053
750
910
697
1.17
1095
756
950
703
1.22
1138
762
1034
716
1.32
1228
774
1124
729
1.42
1323
786
1220
743
1.53
1425
799
1321
756
1.64
1532
812
1428
770
1.76
1645
825
1542
784
1.89
1765
838
1663
798
2.03
1892
851
1790
812
2.17
2025
865
1923
827
2.32
2165
878
2065
841
2.48
2312
892
2213
856
2.65
2467
906
2290
864
2.73
2548
913

0.8
Bhp
1.12
1.16
1.24
1.33
1.38
1.43
1.53
1.64
1.75
1.88
2.00
2.14
2.28
2.43
2.59
2.75
2.92
3.01

Watts
1041
1079
1158
1243
1287
1333
1428
1529
1636
1749
1869
1994
2126
2266
2412
2565
2726
2809

Rpm
779
784
794
805
811
816
828
839
851
863
875
888
901
913
926
940
953
960

1.0
Bhp
1.32
1.36
1.45
1.55
1.60
1.65
1.75
1.87
1.99
2.12
2.25
2.39
2.54
2.69
2.86
3.03
3.21
3.30

Watts
1228
1268
1352
1441
1488
1536
1636
1742
1855
1973
2098
2229
2367
2512
2664
2823
2990
3076

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Watts Rpm
Bhp
Watts
Rpm
1627
927
1.97
1840
971
1671
931
2.02
1886
975
1764
941
2.13
1982
984
1862
950
2.24
2085
993
1913
955
2.29
2138
998
1966
960
2.35
2193
1003
2076
970
2.47
2307
1012
2192
980
2.60
2427
1022
2314
990
2.74
2554
1032
2442
1001
2.88
2687
1043
2577
1012
3.03
2826
1053
2718
1023
3.19
2973
1064
2867
1034
3.35
3126
1074
3022
1045
3.52
3286
—
3185
1057
3.70
3454
—
3355
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.8
Bhp
2.21
2.26
2.37
2.48
2.54
2.60
2.73
2.86
3.00
3.15
3.31
3.47
3.64
—
—
—
—
—

Watts
2061
2109
2209
2315
2370
2427
2545
2670
2800
2938
3082
3233
3391
—
—
—
—
—

Rpm
1013
1017
1026
1035
1039
1044
1053
1063
1072
1082
1093
—
—
—
—
—
—
—

2.0
Bhp
2.46
2.51
2.62
2.74
2.80
2.86
2.99
3.13
3.28
3.43
3.59
—
—
—
—
—
—
—

Watts
2289
2340
2443
2553
2611
2669
2791
2920
3055
3196
3345
—
—
—
—
—
—
—

Refer to page 43 General Fan Performance Notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 3.70.

LEGEND
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 860 to 1080 rpm. All other rpms require fieldsupplied drive.

30

Table 15 — Fan Performance, 50TFQ009 — Vertical Discharge Units; Standard Motor and Drive*
AIRFLOW
(Cfm)
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
3800
3900
4000
4100
4200
4250

AIRFLOW
(Cfm)
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
3800
3900
4000
4100
4200
4250

Rpm
557
565
581
597
613
629
646
662
679
695
712
729
746
754
763
—
—
—
—
—

0.2
Bhp
0.79
0.83
0.91
1.00
1.09
1.20
1.30
1.42
1.54
1.67
1.81
1.95
2.10
2.18
2.26
—
—
—
—
—

Rpm
862
867
878
889
900
912
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.2
Bhp
1.82
1.87
1.99
2.11
2.23
2.36
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
733
770
848
932
1020
1115
1217
1324
1438
1558
1686
1820
1962
2036
2112
—
—
—
—
—

Watts
1697
1747
1852
1963
2080
2204
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Rpm
631
638
652
667
681
696
711
726
741
756
772
787
803
—
—
—
—
—
—
—

Rpm
910
915
925
936
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

0.4
Bhp
0.98
1.02
1.11
1.21
1.31
1.42
1.53
1.65
1.78
1.92
2.06
2.21
2.37
—
—
—
—
—
—
—

1.4
Bhp
2.05
2.11
2.23
2.35
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Watts Rpm
Bhp
Watts Rpm
910
697
1.17
1095
756
950
703
1.22
1138
762
1034
716
1.32
1228
774
1124
729
1.42
1323
786
1220
743
1.53
1425
799
1321
756
1.64
1532
812
1428
770
1.76
1645
825
1542
784
1.89
1765
838
1663
798
2.03
1892
851
1790
812
2.17
2025
—
1923
827
2.32
2165
—
2065
—
—
—
—
2213
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

0.8
Bhp
1.38
1.43
1.53
1.64
1.75
1.88
2.00
2.14
2.28
—
—
—
—
—
—
—
—
—
—
—

Watts
1287
1333
1428
1529
1636
1749
1869
1994
2126
—
—
—
—
—
—
—
—
—
—
—

Rpm
811
816
828
839
851
863
875
888
—
—
—
—
—
—
—
—
—
—
—
—

1.0
Bhp
1.60
1.65
1.75
1.87
1.99
2.12
2.25
2.39
—
—
—
—
—
—
—
—
—
—
—
—

Watts
1488
1536
1636
1742
1855
1973
2098
2229
—
—
—
—
—
—
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
1.6
1.8
Watts Rpm
Bhp
Watts
Rpm
Bhp
1913
955
2.29
2138
—
—
1966
960
2.35
2193
—
—
2076
—
—
—
—
—
2192
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Rpm
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

2.0
Bhp
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Refer to page 43 General Fan Performance Notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 2.40.

LEGEND
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 685 to 935 rpm. All other rpms require fieldsupplied drive.

31

Table 16 — Fan Performance, 50TFQ009 — Vertical Discharge Units; High-Static Motor and Drive*
AIRFLOW
(Cfm)
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
3800
3900
4000
4100
4200
4250

AIRFLOW
(Cfm)
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
3800
3900
4000
4100
4200
4250

Rpm
557
565
581
597
613
629
646
662
679
695
712
729
746
754
763
780
797
814
831
840

0.2
Bhp
0.79
0.83
0.91
1.00
1.09
1.20
1.30
1.42
1.54
1.67
1.81
1.95
2.10
2.18
2.26
2.43
2.61
2.80
2.99
3.09

Rpm
862
867
878
889
900
912
923
935
947
960
972
985
997
1004
1010
—
—
—
—
—

1.2
Bhp
1.82
1.87
1.99
2.11
2.23
2.36
2.50
2.65
2.80
2.96
3.13
3.31
3.49
3.59
3.69
—
—
—
—
—

Watts
733
770
848
932
1020
1115
1217
1324
1438
1558
1686
1820
1962
2036
2112
2269
2434
2607
2788
2883

Watts
1697
1747
1852
1963
2080
2204
2334
2471
2613
2764
2921
3086
3259
3347
3438
—
—
—
—
—

Rpm
631
638
652
667
681
696
711
726
741
756
772
787
803
811
819
835
851
867
883
891

Rpm
910
915
925
936
946
957
969
980
992
1003
1015
1028
—
—
—
—
—
—
—
—

0.4
Bhp
0.98
1.02
1.11
1.21
1.31
1.42
1.53
1.65
1.78
1.92
2.06
2.21
2.37
2.46
2.54
2.72
2.90
3.09
3.29
3.40

1.4
Bhp
2.05
2.11
2.23
2.35
2.48
2.62
2.76
2.92
3.07
3.24
3.42
3.60
—
—
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Watts Rpm
Bhp
Watts Rpm
910
697
1.17
1095
756
950
703
1.22
1138
762
1034
716
1.32
1228
774
1124
729
1.42
1323
786
1220
743
1.53
1425
799
1321
756
1.64
1532
812
1428
770
1.76
1645
825
1542
784
1.89
1765
838
1663
798
2.03
1892
851
1790
812
2.17
2025
865
1923
827
2.32
2165
878
2065
841
2.48
2312
892
2213
856
2.65
2467
906
2290
864
2.73
2548
913
2369
871
2.82
2630
920
2533
886
3.00
2800
934
2705
901
3.19
2978
949
2884
916
3.39
3164
963
3072
932
3.60
3358
—
3170
—
—
—
—

0.8
Bhp
1.38
1.43
1.53
1.64
1.75
1.88
2.00
2.14
2.28
2.43
2.59
2.75
2.92
3.01
3.10
3.29
3.49
3.70
—
—

Watts
1287
1333
1428
1529
1636
1749
1869
1994
2126
2266
2412
2565
2726
2809
2895
3070
3255
3447
—
—

Rpm
811
816
828
839
851
863
875
888
901
913
926
940
953
960
966
980
—
—
—
—

1.0
Bhp
1.60
1.65
1.75
1.87
1.99
2.12
2.25
2.39
2.54
2.69
2.86
3.03
3.21
3.30
3.39
3.59
—
—
—
—

Watts
1488
1536
1636
1742
1855
1973
2098
2229
2367
2512
2664
2823
2990
3076
3164
3346
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Watts Rpm
Bhp
Watts
Rpm
1913
955
2.29
2138
998
1966
960
2.35
2193
1003
2076
970
2.47
2307
1012
2192
980
2.60
2427
1022
2314
990
2.74
2554
1032
2442
1001
2.88
2687
1043
2577
1012
3.03
2826
1053
2718
1023
3.19
2973
1064
2867
1034
3.35
3126
1074
3022
1045
3.52
3286
—
3185
1057
3.70
3454
—
3355
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.8
Bhp
2.54
2.60
2.73
2.86
3.00
3.15
3.31
3.47
3.64
—
—
—
—
—
—
—
—
—
—
—

Watts
2370
2427
2545
2670
2800
2938
3082
3233
3391
—
—
—
—
—
—
—
—
—
—
—

Rpm
1039
1044
1053
1063
1072
1082
1093
—
—
—
—
—
—
—
—
—
—
—
—
—

2.0
Bhp
2.80
2.86
2.99
3.13
3.28
3.43
3.59
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
2611
2669
2791
2920
3055
3196
3345
—
—
—
—
—
—
—
—
—
—
—
—
—

Refer to page 43 General Fan Performance Notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 3.70.

LEGEND
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 860 to 1080 rpm. All other rpms require fieldsupplied drive.

32

Table 17 — Fan Performance, 50TFQ012 — Vertical Discharge Units; Standard Motor and Drive*
AIRFLOW
(Cfm)
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000

AIRFLOW
(Cfm)
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000

Rpm
556
569
583
597
611
625
639
654
668
683
697
712
726
741
755
770
785
800
815
829
—

0.2
Bhp
0.65
0.70
0.76
0.83
0.89
0.96
1.04
1.11
1.20
1.28
1.37
1.47
1.57
1.67
1.78
1.89
2.01
2.14
2.26
2.40
—

Rpm
836
846
856
866
876
886
897
907
918
929
940
—
—
—
—
—
—
—
—
—
—

1.2
Bhp
1.42
1.50
1.58
1.67
1.76
1.86
1.96
2.06
2.17
2.28
2.40
—
—
—
—
—
—
—
—
—
—

Watts
604
656
712
770
832
898
967
1040
1116
1197
1281
1370
1462
1559
1660
1766
1876
1991
2111
2235
—

Watts
1322
1398
1477
1559
1645
1734
1827
1924
2025
2130
2238
—
—
—
—
—
—
—
—
—
—

Rpm
623
636
648
661
674
687
700
713
726
739
753
766
780
794
807
821
835
849
—
—
—

Rpm
881
890
899
909
919
929
939
949
959
—
—
—
—
—
—
—
—
—
—
—
—

0.4
Bhp
0.80
0.86
0.93
1.00
1.07
1.14
1.22
1.31
1.39
1.48
1.58
1.68
1.79
1.89
2.01
2.13
2.25
2.38
—
—
—

1.4
Bhp
1.57
1.66
1.75
1.84
1.94
2.04
2.14
2.25
2.37
—
—
—
—
—
—
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Watts Rpm
Bhp
Watts Rpm
748
684
0.95
891
738
805
695
1.02
953
749
865
707
1.09
1018
760
929
718
1.17
1086
771
996
730
1.24
1158
782
1066
742
1.32
1233
794
1140
754
1.41
1312
805
1218
767
1.50
1395
817
1299
779
1.59
1481
828
1385
792
1.69
1572
840
1474
804
1.79
1666
852
1567
817
1.89
1764
864
1665
830
2.00
1866
876
1767
843
2.12
1973
889
1873
856
2.23
2084
—
1984
869
2.36
2200
—
2099
—
—
—
—
2219
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

0.8
Bhp
1.11
1.18
1.26
1.33
1.42
1.50
1.59
1.69
1.78
1.88
1.99
2.10
2.22
2.34
—
—
—
—
—
—
—

Watts
1034
1100
1170
1244
1320
1400
1484
1571
1662
1758
1857
1960
2067
2179
—
—
—
—
—
—
—

Rpm
789
799
809
820
831
841
852
863
874
886
897
909
—
—
—
—
—
—
—
—
—

1.0
Bhp
1.26
1.34
1.42
1.50
1.59
1.68
1.78
1.87
1.98
2.08
2.20
2.31
—
—
—
—
—
—
—
—
—

Watts
1177
1249
1323
1401
1483
1567
1656
1748
1844
1943
2048
2155
—
—
—
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Watts Rpm
Bhp
Watts
Rpm
1467
923
1.73
1613
963
1547
932
1.82
1698
972
1631
941
1.92
1786
980
1718
950
2.01
1878
989
1808
960
2.12
1972
998
1902
969
2.22
2071
1008
2000
979
2.33
2173
—
2101
—
—
—
—
2207
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.8
Bhp
1.89
1.98
2.08
2.19
2.29
2.40
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
1761
1849
1942
2038
2137
2240
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Rpm
1001
1010
1018
1027
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

2.0
Bhp
2.05
2.15
2.25
2.36
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
1909
2002
2099
2199
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Refer to page 43 General Fan Performance Notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 2.40.

LEGEND
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 685 to 935 rpm. All other rpms require fieldsupplied drive.

33

Table 18 — Fan Performance, 50TFQ012 — Vertical Discharge Units; Alternate Motor and Drive*
AIRFLOW
(Cfm)
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000

AIRFLOW
(Cfm)
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000

Rpm
556
569
583
597
611
625
639
654
668
683
697
712
726
741
755
770
785
800
815
829
844

0.2
Bhp
0.65
0.70
0.76
0.83
0.89
0.96
1.04
1.11
1.20
1.28
1.37
1.47
1.57
1.67
1.78
1.89
2.01
2.14
2.26
2.40
2.54

Rpm
836
846
856
866
876
886
897
907
918
929
940
951
962
973
—
—
—
—
—
—
—

1.2
Bhp
1.42
1.50
1.58
1.67
1.76
1.86
1.96
2.06
2.17
2.28
2.40
2.52
2.65
2.78
—
—
—
—
—
—
—

Watts
604
656
712
770
832
898
967
1040
1116
1197
1281
1370
1462
1559
1660
1766
1876
1991
2111
2235
2365

Watts
1322
1398
1477
1559
1645
1734
1827
1924
2025
2130
2238
2351
2468
2589
—
—
—
—
—
—
—

Rpm
623
636
648
661
674
687
700
713
726
739
753
766
780
794
807
821
835
849
863
877
891

Rpm
881
890
899
909
919
929
939
949
959
970
980
991
1002
—
—
—
—
—
—
—
—

0.4
Bhp
0.80
0.86
0.93
1.00
1.07
1.14
1.22
1.31
1.39
1.48
1.58
1.68
1.79
1.89
2.01
2.13
2.25
2.38
2.51
2.65
2.80

1.4
Bhp
1.57
1.66
1.75
1.84
1.94
2.04
2.14
2.25
2.37
2.48
2.61
2.73
2.86
—
—
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Watts Rpm
Bhp
Watts Rpm
748
684
0.95
891
738
805
695
1.02
953
749
865
707
1.09
1018
760
929
718
1.17
1086
771
996
730
1.24
1158
782
1066
742
1.32
1233
794
1140
754
1.41
1312
805
1218
767
1.50
1395
817
1299
779
1.59
1481
828
1385
792
1.69
1572
840
1474
804
1.79
1666
852
1567
817
1.89
1764
864
1665
830
2.00
1866
876
1767
843
2.12
1973
889
1873
856
2.23
2084
901
1984
869
2.36
2200
914
2099
882
2.49
2320
926
2219
895
2.62
2445
939
2344
909
2.76
2575
—
2473
—
—
—
—
2608
—
—
—
—

0.8
Bhp
1.11
1.18
1.26
1.33
1.42
1.50
1.59
1.69
1.78
1.88
1.99
2.10
2.22
2.34
2.46
2.59
2.72
2.86
—
—
—

Watts
1034
1100
1170
1244
1320
1400
1484
1571
1662
1758
1857
1960
2067
2179
2295
2415
2541
2670
—
—
—

Rpm
789
799
809
820
831
841
852
863
874
886
897
909
920
932
944
956
—
—
—
—
—

1.0
Bhp
1.26
1.34
1.42
1.50
1.59
1.68
1.78
1.87
1.98
2.08
2.20
2.31
2.43
2.56
2.69
2.82
—
—
—
—
—

Watts
1177
1249
1323
1401
1483
1567
1656
1748
1844
1943
2048
2155
2268
2384
2505
2630
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Watts Rpm
Bhp
Watts
Rpm
1467
923
1.73
1613
963
1547
932
1.82
1698
972
1631
941
1.92
1786
980
1718
950
2.01
1878
989
1808
960
2.12
1972
998
1902
969
2.22
2071
1008
2000
979
2.33
2173
1017
2101
989
2.44
2279
1027
2207
999
2.56
2389
1036
2316
1009
2.68
2502
1046
2429
1019
2.81
2620
—
2547
—
—
—
—
2668
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.8
Bhp
1.89
1.98
2.08
2.19
2.29
2.40
2.52
2.63
2.76
2.88
—
—
—
—
—
—
—
—
—
—
—

Watts
1761
1849
1942
2038
2137
2240
2347
2457
2571
2690
—
—
—
—
—
—
—
—
—
—
—

Rpm
1001
1010
1018
1027
1036
1045
1054
1063
—
—
—
—
—
—
—
—
—
—
—
—
—

2.0
Bhp
2.05
2.15
2.25
2.36
2.47
2.58
2.70
2.83
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
1909
2002
2099
2199
2303
2410
2521
2636
—
—
—
—
—
—
—
—
—
—
—
—
—

Refer to page 43 General Fan Performance Notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 2.90.

LEGEND
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 835 to 1085 rpm. All other rpms require fieldsupplied drive.

34

Table 19 — Fan Performance, 50TFQ012 — Vertical Discharge Units; High-Static Motor and Drive*
AIRFLOW
(Cfm)
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000

AIRFLOW
(Cfm)
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000

Rpm
556
569
583
597
611
625
639
654
668
683
697
712
726
741
755
770
785
800
815
829
844

0.2
Bhp
0.65
0.70
0.76
0.83
0.89
0.96
1.04
1.11
1.20
1.28
1.37
1.47
1.57
1.67
1.78
1.89
2.01
2.14
2.26
2.40
2.54

Rpm
836
846
856
866
876
886
897
907
918
929
940
951
962
973
985
996
1008
1020
1032
1044
1056

1.2
Bhp
1.42
1.50
1.58
1.67
1.76
1.86
1.96
2.06
2.17
2.28
2.40
2.52
2.65
2.78
2.91
3.05
3.20
3.34
3.50
3.66
3.82

Watts
604
656
712
770
832
898
967
1040
1116
1197
1281
1370
1462
1559
1660
1766
1876
1991
2111
2235
2365

Watts
1322
1398
1477
1559
1645
1734
1827
1924
2025
2130
2238
2351
2468
2589
2715
2845
2979
3119
3263
3413
3566

Rpm
623
636
648
661
674
687
700
713
726
739
753
766
780
794
807
821
835
849
863
877
891

Rpm
881
890
899
909
919
929
939
949
959
970
980
991
1002
1013
1024
1035
1046
1058
1069
1081
1093

0.4
Bhp
0.80
0.86
0.93
1.00
1.07
1.14
1.22
1.31
1.39
1.48
1.58
1.68
1.79
1.89
2.01
2.13
2.25
2.38
2.51
2.65
2.80

1.4
Bhp
1.57
1.66
1.75
1.84
1.94
2.04
2.14
2.25
2.37
2.48
2.61
2.73
2.86
3.00
3.14
3.28
3.43
3.58
3.74
3.91
4.08

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Watts Rpm
Bhp
Watts Rpm
748
684
0.95
891
738
805
695
1.02
953
749
865
707
1.09
1018
760
929
718
1.17
1086
771
996
730
1.24
1158
782
1066
742
1.32
1233
794
1140
754
1.41
1312
805
1218
767
1.50
1395
817
1299
779
1.59
1481
828
1385
792
1.69
1572
840
1474
804
1.79
1666
852
1567
817
1.89
1764
864
1665
830
2.00
1866
876
1767
843
2.12
1973
889
1873
856
2.23
2084
901
1984
869
2.36
2200
914
2099
882
2.49
2320
926
2219
895
2.62
2445
939
2344
909
2.76
2575
952
2473
922
2.91
2709
965
2608
936
3.06
2849
978

0.8
Bhp
1.11
1.18
1.26
1.33
1.42
1.50
1.59
1.69
1.78
1.88
1.99
2.10
2.22
2.34
2.46
2.59
2.72
2.86
3.01
3.16
3.31

Watts
1034
1100
1170
1244
1320
1400
1484
1571
1662
1758
1857
1960
2067
2179
2295
2415
2541
2670
2805
2944
3089

Rpm
789
799
809
820
831
841
852
863
874
886
897
909
920
932
944
956
968
980
993
1005
1018

1.0
Bhp
1.26
1.34
1.42
1.50
1.59
1.68
1.78
1.87
1.98
2.08
2.20
2.31
2.43
2.56
2.69
2.82
2.96
3.10
3.25
3.41
3.57

Watts
1177
1249
1323
1401
1483
1567
1656
1748
1844
1943
2048
2155
2268
2384
2505
2630
2760
2895
3034
3178
3328

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Watts Rpm
Bhp
Watts
Rpm
1467
923
1.73
1613
963
1547
932
1.82
1698
972
1631
941
1.92
1786
980
1718
950
2.01
1878
989
1808
960
2.12
1972
998
1902
969
2.22
2071
1008
2000
979
2.33
2173
1017
2101
989
2.44
2279
1027
2207
999
2.56
2389
1036
2316
1009
2.68
2502
1046
2429
1019
2.81
2620
1056
2547
1029
2.94
2743
1066
2668
1040
3.08
2869
1076
2794
1050
3.22
2999
1087
2924
1061
3.36
3134
1097
3059
1072
3.51
3274
1108
3199
1083
3.67
3418
1118
3343
1094
3.83
3567
1129
3492
1105
3.99
3721
1140
3646
1117
4.16
3880
1151
3805
1128
4.34
4044
1162

1.8
Bhp
1.89
1.98
2.08
2.19
2.29
2.40
2.52
2.63
2.76
2.88
3.02
3.15
3.29
3.44
3.59
3.74
3.90
4.07
4.24
4.41
4.59

Watts
1761
1849
1942
2038
2137
2240
2347
2457
2571
2690
2812
2939
3070
3205
3345
3489
3638
3792
3950
4113
4282

Rpm
1001
1010
1018
1027
1036
1045
1054
1063
1073
1082
1092
1102
1112
1122
1132
1142
1152
1163
1174
1184
1195

2.0
Bhp
2.05
2.15
2.25
2.36
2.47
2.58
2.70
2.83
2.95
3.09
3.22
3.36
3.51
3.66
3.81
3.97
4.14
4.31
4.48
4.66
4.85

Watts
1909
2002
2099
2199
2303
2410
2521
2636
2755
2877
3004
3136
3271
3411
3555
3704
3857
4016
4179
4347
4520

Refer to page 43 General Fan Performance Notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 5.25.

LEGEND
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 830 to 1130 rpm. All other rpms require fieldsupplied drive.

35

Table 20 — Fan Performance, 50TFQ008 — Horizontal Discharge Units; Standard Motor and Drive*
AIRFLOW
(Cfm)
2250
2300
2400
2500
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750

AIRFLOW
(Cfm)
2250
2300
2400
2500
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750

Rpm
465
471
483
495
501
507
519
532
544
557
570
582
595
608
622
635
648
655

0.2
Bhp
0.49
0.52
0.57
0.63
0.66
0.69
0.76
0.83
0.91
0.99
1.07
1.17
1.26
1.36
1.47
1.58
1.70
1.77

Rpm
806
810
818
827
832
836
845
854
863
872
882
—
—
—
—
—
—
—

1.2
Bhp
1.42
1.46
1.55
1.64
1.68
1.73
1.83
1.94
2.05
2.16
2.28
—
—
—
—
—
—
—

Watts
459
483
534
588
617
647
709
775
846
922
1002
1087
1177
1271
1372
1477
1588
1646

Watts
1326
1363
1443
1527
1570
1615
1708
1805
1907
2015
2127
—
—
—
—
—
—
—

Rpm
555
560
570
581
586
592
603
614
625
637
648
660
671
683
695
707
720
726

Rpm
855
859
868
876
880
885
893
902
911
—
—
—
—
—
—
—
—
—

0.4
Bhp
0.67
0.69
0.76
0.82
0.86
0.89
0.97
1.05
1.13
1.22
1.31
1.41
1.52
1.63
1.74
1.86
1.99
2.06

1.4
Bhp
1.63
1.67
1.76
1.86
1.91
1.96
2.06
2.17
2.29
—
—
—
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Watts Rpm
Bhp
Watts Rpm
621
629
0.84
786
694
648
634
0.88
817
698
705
644
0.94
880
708
767
653
1.02
948
717
799
658
1.05
983
722
832
663
1.09
1020
727
902
674
1.18
1096
736
976
684
1.26
1176
746
1054
694
1.35
1261
756
1137
705
1.45
1351
766
1224
716
1.55
1445
776
1317
727
1.66
1545
786
1414
738
1.77
1649
797
1517
749
1.89
1759
807
1625
760
2.01
1874
818
1738
771
2.14
1995
—
1857
783
2.27
2121
—
1918
788
2.34
2187
—

0.8
Bhp
1.03
1.06
1.14
1.22
1.26
1.30
1.39
1.48
1.58
1.68
1.79
1.90
2.02
2.15
2.28
—
—
—

Watts
959
992
1061
1134
1173
1212
1294
1381
1472
1568
1669
1774
1885
2002
2124
—
—
—

Rpm
752
757
765
774
779
784
793
802
812
821
831
841
851
—
—
—
—
—

1.0
Bhp
1.22
1.26
1.34
1.42
1.47
1.51
1.61
1.71
1.81
1.92
2.03
2.15
2.28
—
—
—
—
—

Watts
1138
1174
1248
1327
1368
1410
1498
1590
1687
1789
1896
2008
2125
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Watts Rpm
Bhp
Watts
Rpm
1521
902
1.85
1723
946
1561
906
1.89
1765
950
1644
914
1.99
1853
958
1733
922
2.09
1946
966
1779
926
2.14
1994
970
1826
931
2.19
2043
—
1923
939
2.30
2146
—
2026
—
—
—
—
2134
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.8
Bhp
2.07
2.12
2.22
2.32
2.38
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
1932
1976
2068
2165
2215
—
—
—
—
—
—
—
—
—
—
—
—
—

Rpm
988
991
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

2.0
Bhp
2.30
2.35
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
2148
2194
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Refer to page 43 General Fan Performance Notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 2.40.

LEGEND
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 590 to 840 rpm. All other rpms require fieldsupplied drive.

36

Table 21 — Fan Performance, 50TFQ008 — Horizontal Discharge Units; Alternate Motor and Drive*
AIRFLOW
(Cfm)
2250
2300
2400
2500
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750

AIRFLOW
(Cfm)
2250
2300
2400
2500
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750

Rpm
465
471
483
495
501
507
519
532
544
557
570
582
595
608
622
635
648
655

0.2
Bhp
0.49
0.52
0.57
0.63
0.66
0.69
0.76
0.83
0.91
0.99
1.07
1.17
1.26
1.36
1.47
1.58
1.70
1.77

Rpm
806
810
818
827
832
836
845
854
863
872
882
—
—
—
—
—
—
—

1.2
Bhp
1.42
1.46
1.55
1.64
1.68
1.73
1.83
1.94
2.05
2.16
2.28
—
—
—
—
—
—
—

Watts
459
483
534
588
617
647
709
775
846
922
1002
1087
1177
1271
1372
1477
1588
1646

Watts
1326
1363
1443
1527
1570
1615
1708
1805
1907
2015
2127
—
—
—
—
—
—
—

Rpm
555
560
570
581
586
592
603
614
625
637
648
660
671
683
695
707
720
726

Rpm
855
859
868
876
880
885
893
902
911
—
—
—
—
—
—
—
—
—

0.4
Bhp
0.67
0.69
0.76
0.82
0.86
0.89
0.97
1.05
1.13
1.22
1.31
1.41
1.52
1.63
1.74
1.86
1.99
2.06

1.4
Bhp
1.63
1.67
1.76
1.86
1.91
1.96
2.06
2.17
2.29
—
—
—
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Watts Rpm
Bhp
Watts Rpm
621
629
0.84
786
694
648
634
0.88
817
698
705
644
0.94
880
708
767
653
1.02
948
717
799
658
1.05
983
722
832
663
1.09
1020
727
902
674
1.18
1096
736
976
684
1.26
1176
746
1054
694
1.35
1261
756
1137
705
1.45
1351
766
1224
716
1.55
1445
776
1317
727
1.66
1545
786
1414
738
1.77
1649
797
1517
749
1.89
1759
807
1625
760
2.01
1874
818
1738
771
2.14
1995
—
1857
783
2.27
2121
—
1918
788
2.34
2187
—

0.8
Bhp
1.03
1.06
1.14
1.22
1.26
1.30
1.39
1.48
1.58
1.68
1.79
1.90
2.02
2.15
2.28
—
—
—

Watts
959
992
1061
1134
1173
1212
1294
1381
1472
1568
1669
1774
1885
2002
2124
—
—
—

Rpm
752
757
765
774
779
784
793
802
812
821
831
841
851
—
—
—
—
—

1.0
Bhp
1.22
1.26
1.34
1.42
1.47
1.51
1.61
1.71
1.81
1.92
2.03
2.15
2.28
—
—
—
—
—

Watts
1138
1174
1248
1327
1368
1410
1498
1590
1687
1789
1896
2008
2125
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Watts Rpm
Bhp
Watts
Rpm
1521
902
1.85
1723
946
1561
906
1.89
1765
950
1644
914
1.99
1853
958
1733
922
2.09
1946
966
1779
926
2.14
1994
970
1826
931
2.19
2043
—
1923
939
2.30
2146
—
2026
—
—
—
—
2134
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.8
Bhp
2.07
2.12
2.22
2.32
2.38
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
1932
1976
2068
2165
2215
—
—
—
—
—
—
—
—
—
—
—
—
—

Rpm
988
991
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

2.0
Bhp
2.30
2.35
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
2148
2194
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Refer to page 43 General Fan Performance Notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 2.40.

LEGEND
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 685 to 935 rpm. All other rpms require fieldsupplied drive.

37

Table 22 — Fan Performance, 50TFQ008 — Horizontal Discharge Units; High-Static Motor and Drive*
AIRFLOW
(Cfm)
2250
2300
2400
2500
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750

AIRFLOW
(Cfm)
2250
2300
2400
2500
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750

Rpm
465
471
483
495
501
507
519
532
544
557
570
582
595
608
622
635
648
655

0.2
Bhp
0.49
0.52
0.57
0.63
0.66
0.69
0.76
0.83
0.91
0.99
1.07
1.17
1.26
1.36
1.47
1.58
1.70
1.77

Rpm
806
810
818
827
832
836
845
854
863
872
882
891
901
911
921
930
941
946

1.2
Bhp
1.42
1.46
1.55
1.64
1.68
1.73
1.83
1.94
2.05
2.16
2.28
2.41
2.54
2.68
2.82
2.97
3.13
3.21

Watts
459
483
534
588
617
647
709
775
846
922
1002
1087
1177
1271
1372
1477
1588
1646

Watts
1326
1363
1443
1527
1570
1615
1708
1805
1907
2015
2127
2245
2369
2497
2632
2772
2918
2994

Rpm
555
560
570
581
586
592
603
614
625
637
648
660
671
683
695
707
720
726

Rpm
855
859
868
876
880
885
893
902
911
920
929
938
948
957
967
977
986
991

0.4
Bhp
0.67
0.69
0.76
0.82
0.86
0.89
0.97
1.05
1.13
1.22
1.31
1.41
1.52
1.63
1.74
1.86
1.99
2.06

1.4
Bhp
1.63
1.67
1.76
1.86
1.91
1.96
2.06
2.17
2.29
2.41
2.54
2.67
2.81
2.95
3.10
3.26
3.42
3.50

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Watts Rpm
Bhp
Watts Rpm
621
629
0.84
786
694
648
634
0.88
817
698
705
644
0.94
880
708
767
653
1.02
948
717
799
658
1.05
983
722
832
663
1.09
1020
727
902
674
1.18
1096
736
976
684
1.26
1176
746
1054
694
1.35
1261
756
1137
705
1.45
1351
766
1224
716
1.55
1445
776
1317
727
1.66
1545
786
1414
738
1.77
1649
797
1517
749
1.89
1759
807
1625
760
2.01
1874
818
1738
771
2.14
1995
829
1857
783
2.27
2121
839
1918
788
2.34
2187
845

0.8
Bhp
1.03
1.06
1.14
1.22
1.26
1.30
1.39
1.48
1.58
1.68
1.79
1.90
2.02
2.15
2.28
2.41
2.56
2.63

Watts
959
992
1061
1134
1173
1212
1294
1381
1472
1568
1669
1774
1885
2002
2124
2252
2385
2454

Rpm
752
757
765
774
779
784
793
802
812
821
831
841
851
861
871
881
892
897

1.0
Bhp
1.22
1.26
1.34
1.42
1.47
1.51
1.61
1.71
1.81
1.92
2.03
2.15
2.28
2.41
2.55
2.69
2.84
2.92

Watts
1138
1174
1248
1327
1368
1410
1498
1590
1687
1789
1896
2008
2125
2248
2376
2510
2650
2722

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Watts Rpm
Bhp
Watts
Rpm
1521
902
1.85
1723
946
1561
906
1.89
1765
950
1644
914
1.99
1853
958
1733
922
2.09
1946
966
1779
926
2.14
1994
970
1826
931
2.19
2043
974
1923
939
2.30
2146
982
2026
948
2.42
2253
991
2134
956
2.54
2366
999
2246
965
2.66
2483
1008
2365
974
2.80
2607
1016
2488
983
2.93
2735
1025
2617
992
3.08
2869
1034
2751
1001
3.23
3010
1043
2891
1011
3.38
3155
1052
3038
1020
3.55
3307
—
3190
1030
3.72
3465
—
3268
—
—
—
—

1.8
Bhp
2.07
2.12
2.22
2.32
2.38
2.43
2.55
2.67
2.79
2.92
3.06
3.20
3.35
3.51
3.67
—
—
—

Watts
1932
1976
2068
2165
2215
2267
2374
2486
2603
2726
2854
2988
3127
3273
3424
—
—
—

Rpm
988
991
999
1007
1011
1015
1023
1031
1040
1048
1057
1065
1074
—
—
—
—
—

2.0
Bhp
2.30
2.35
2.46
2.56
2.62
2.68
2.80
2.92
3.05
3.19
3.33
3.48
3.64
—
—
—
—
—

Watts
2148
2194
2290
2391
2444
2497
2609
2725
2847
2974
3107
3246
3390
—
—
—
—
—

Refer to page 43 General Fan Performance Notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 3.70.

LEGEND
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 860 to 1080 rpm. All other rpms require fieldsupplied drive.

38

Table 23 — Fan Performance, 50TFQ009 — Horizontal Discharge Units; Standard Motor and Drive*
AIRFLOW
(Cfm)
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
3800
3900
4000
4100
4200
4250

AIRFLOW
(Cfm)
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
3800
3900
4000
4100
4200
4250

Rpm
501
507
519
532
544
557
570
582
595
608
622
635
648
655
662
675
689
702
716
—

0.2
Bhp
0.66
0.69
0.76
0.83
0.91
0.99
1.07
1.17
1.26
1.36
1.47
1.58
1.70
1.77
1.83
1.96
2.10
2.24
2.40
—

Rpm
832
836
845
854
863
872
882
—
—
—
—
—
—
—
—
—
—
—
—
—

1.2
Bhp
1.68
1.73
1.83
1.94
2.05
2.16
2.28
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
617
647
709
775
846
922
1002
1087
1177
1271
1372
1477
1588
1646
1705
1828
1957
2092
2234
—

Watts
1570
1615
1708
1805
1907
2015
2127
—
—
—
—
—
—
—
—
—
—
—
—
—

Rpm
586
592
603
614
625
637
648
660
671
683
695
707
720
726
732
744
—
—
—
—

Rpm
880
885
893
902
911
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

0.4
Bhp
0.86
0.89
0.97
1.05
1.13
1.22
1.31
1.41
1.52
1.63
1.74
1.86
1.99
2.06
2.13
2.26
—
—
—
—

1.4
Bhp
1.91
1.96
2.06
2.17
2.29
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Watts Rpm
Bhp
Watts Rpm
799
658
1.05
983
722
832
663
1.09
1020
727
902
674
1.18
1096
736
976
684
1.26
1176
746
1054
694
1.35
1261
756
1137
705
1.45
1351
766
1224
716
1.55
1445
776
1317
727
1.66
1545
786
1414
738
1.77
1649
797
1517
749
1.89
1759
807
1625
760
2.01
1874
818
1738
771
2.14
1995
—
1857
783
2.27
2121
—
1918
788
2.34
2187
—
1982
—
—
—
—
2112
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

0.8
Bhp
1.26
1.30
1.39
1.48
1.58
1.68
1.79
1.90
2.02
2.15
2.28
—
—
—
—
—
—
—
—
—

Watts
1173
1212
1294
1381
1472
1568
1669
1774
1885
2002
2124
—
—
—
—
—
—
—
—
—

Rpm
779
784
793
802
812
821
831
841
851
—
—
—
—
—
—
—
—
—
—
—

1.0
Bhp
1.47
1.51
1.61
1.71
1.81
1.92
2.03
2.15
2.28
—
—
—
—
—
—
—
—
—
—
—

Watts
1368
1410
1498
1590
1687
1789
1896
2008
2125
—
—
—
—
—
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
1.6
1.8
Watts Rpm
Bhp
Watts
Rpm
Bhp
1779
926
2.14
1994
970
2.38
1826
931
2.19
2043
—
—
1923
939
2.30
2146
—
—
2026
—
—
—
—
—
2134
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
2215
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Rpm
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

2.0
Bhp
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Refer to page 43 General Fan Performance Notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 2.40.

LEGEND
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 685 to 935 rpm. All other rpms require fieldsupplied drive.

39

Table 24 — Fan Performance, 50TFQ009 — Horizontal Discharge Units; High-Static Motor and Drive*
AIRFLOW
(Cfm)
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
3800
3900
4000
4100
4200
4250

AIRFLOW
(Cfm)
2550
2600
2700
2800
2900
3000
3100
3200
3300
3400
3500
3600
3700
3750
3800
3900
4000
4100
4200
4250

Rpm
501
507
519
532
544
557
570
582
595
608
622
635
648
655
662
675
689
702
716
723

0.2
Bhp
0.66
0.69
0.76
0.83
0.91
0.99
1.07
1.17
1.26
1.36
1.47
1.58
1.70
1.77
1.83
1.96
2.10
2.24
2.40
2.47

Rpm
832
836
845
854
863
872
882
891
901
911
921
930
941
946
951
961
971
—
—
—

1.2
Bhp
1.68
1.73
1.83
1.94
2.05
2.16
2.28
2.41
2.54
2.68
2.82
2.97
3.13
3.21
3.29
3.46
3.64
—
—
—

Watts
617
647
709
775
846
922
1002
1087
1177
1271
1372
1477
1588
1646
1705
1828
1957
2092
2234
2307

Watts
1570
1615
1708
1805
1907
2015
2127
2245
2369
2497
2632
2772
2918
2994
3071
3229
3393
—
—
—

Rpm
586
592
603
614
625
637
648
660
671
683
695
707
720
726
732
744
757
769
782
788

Rpm
880
885
893
902
911
920
929
938
948
957
967
977
986
991
996
—
—
—
—
—

0.4
Bhp
0.86
0.89
0.97
1.05
1.13
1.22
1.31
1.41
1.52
1.63
1.74
1.86
1.99
2.06
2.13
2.26
2.41
2.57
2.73
2.81

1.4
Bhp
1.91
1.96
2.06
2.17
2.29
2.41
2.54
2.67
2.81
2.95
3.10
3.26
3.42
3.50
3.59
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Watts Rpm
Bhp
Watts Rpm
799
658
1.05
983
722
832
663
1.09
1020
727
902
674
1.18
1096
736
976
684
1.26
1176
746
1054
694
1.35
1261
756
1137
705
1.45
1351
766
1224
716
1.55
1445
776
1317
727
1.66
1545
786
1414
738
1.77
1649
797
1517
749
1.89
1759
807
1625
760
2.01
1874
818
1738
771
2.14
1995
829
1857
783
2.27
2121
839
1918
788
2.34
2187
845
1982
794
2.42
2253
850
2112
806
2.56
2392
861
2249
817
2.72
2536
873
2392
829
2.88
2686
884
2541
841
3.05
2843
895
2619
847
3.14
2924
901

0.8
Bhp
1.26
1.30
1.39
1.48
1.58
1.68
1.79
1.90
2.02
2.15
2.28
2.41
2.56
2.63
2.71
2.86
3.02
3.19
3.37
3.46

Watts
1173
1212
1294
1381
1472
1568
1669
1774
1885
2002
2124
2252
2385
2454
2524
2669
2820
2978
3143
3227

Rpm
779
784
793
802
812
821
831
841
851
861
871
881
892
897
902
913
924
935
945
—

1.0
Bhp
1.47
1.51
1.61
1.71
1.81
1.92
2.03
2.15
2.28
2.41
2.55
2.69
2.84
2.92
3.00
3.16
3.33
3.51
3.69
—

Watts
1368
1410
1498
1590
1687
1789
1896
2008
2125
2248
2376
2510
2650
2722
2796
2948
3106
3271
3442
—

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Watts Rpm
Bhp
Watts
Rpm
1779
926
2.14
1994
970
1826
931
2.19
2043
974
1923
939
2.30
2146
982
2026
948
2.42
2253
991
2134
956
2.54
2366
999
2246
965
2.66
2483
1008
2365
974
2.80
2607
1016
2488
983
2.93
2735
1025
2617
992
3.08
2869
1034
2751
1001
3.23
3010
1043
2891
1011
3.38
3155
1052
3038
1020
3.55
3307
—
3190
—
—
—
—
3268
—
—
—
—
3348
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.8
Bhp
2.38
2.43
2.55
2.67
2.79
2.92
3.06
3.20
3.35
3.51
3.67
—
—
—
—
—
—
—
—
—

Watts
2215
2267
2374
2486
2603
2726
2854
2988
3127
3273
3424
—
—
—
—
—
—
—
—
—

Rpm
1011
1015
1023
1031
1040
1048
1057
1065
1074
—
—
—
—
—
—
—
—
—
—
—

2.0
Bhp
2.62
2.68
2.80
2.92
3.05
3.19
3.33
3.48
3.64
—
—
—
—
—
—
—
—
—
—
—

Watts
2444
2497
2609
2725
2847
2974
3107
3246
3390
—
—
—
—
—
—
—
—
—
—
—

Refer to page 43 General Fan Performance Notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 3.70.

LEGEND
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 860 to 1080 rpm. All other rpms require fieldsupplied drive.

40

Table 25 — Fan Performance, 50TFQ012 — Horizontal Discharge Units; Standard Motor and Drive*
AIRFLOW
(Cfm)
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000

AIRFLOW
(Cfm)
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000

Rpm
523
536
549
562
575
588
601
614
628
641
655
668
682
696
710
723
737
751
765
779
793

0.2
Bhp
0.58
0.63
0.68
0.74
0.80
0.86
0.93
1.00
1.07
1.15
1.23
1.31
1.40
1.49
1.59
1.69
1.80
1.91
2.02
2.14
2.26

Rpm
830
837
843
850
858
865
873
881
889
898
907
916
—
—
—
—
—
—
—
—
—

1.2
Bhp
1.39
1.46
1.53
1.61
1.69
1.77
1.86
1.95
2.04
2.14
2.24
2.35
—
—
—
—
—
—
—
—
—

Watts
541
587
637
689
744
802
864
929
997
1069
1144
1223
1305
1392
1482
1577
1675
1778
1885
1996
2112

Watts
1298
1363
1431
1502
1576
1653
1733
1816
1904
1995
2089
2187
—
—
—
—
—
—
—
—
—

Rpm
592
603
614
626
637
649
661
673
685
697
709
722
734
747
760
773
785
798
812
825
—

Rpm
883
889
894
901
907
914
921
928
936
944
—
—
—
—
—
—
—
—
—
—
—

0.4
Bhp
0.73
0.78
0.84
0.90
0.96
1.03
1.10
1.17
1.25
1.33
1.42
1.51
1.60
1.70
1.80
1.90
2.01
2.13
2.25
2.37
—

1.4
Bhp
1.57
1.65
1.72
1.80
1.88
1.97
2.06
2.16
2.25
2.35
—
—
—
—
—
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Watts Rpm
Bhp
Watts Rpm
680
657
0.88
825
718
730
666
0.94
879
726
783
676
1.00
936
735
839
686
1.07
996
743
898
696
1.14
1059
752
961
707
1.21
1125
762
1026
717
1.28
1194
771
1095
728
1.36
1267
781
1167
739
1.44
1343
791
1243
750
1.53
1423
801
1322
761
1.61
1506
812
1405
773
1.71
1593
822
1492
784
1.80
1683
833
1582
796
1.91
1777
844
1677
808
2.01
1876
855
1775
820
2.12
1978
866
1877
832
2.24
2085
—
1984
844
2.35
2195
—
2095
—
—
—
—
2210
—
—
—
—
—
—
—
—
—

0.8
Bhp
1.05
1.11
1.17
1.24
1.31
1.39
1.47
1.55
1.64
1.72
1.82
1.92
2.02
2.12
2.23
2.35
—
—
—
—
—

Watts
977
1035
1096
1159
1226
1296
1369
1445
1525
1608
1695
1786
1880
1979
2081
2187
—
—
—
—
—

Rpm
775
783
790
798
806
815
823
832
841
850
860
870
880
890
—
—
—
—
—
—
—

1.0
Bhp
1.22
1.28
1.35
1.42
1.50
1.58
1.66
1.75
1.84
1.93
2.03
2.13
2.23
2.34
—
—
—
—
—
—
—

Watts
1135
1196
1260
1328
1398
1472
1548
1629
1712
1799
1890
1984
2082
2184
—
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Watts Rpm
Bhp
Watts
Rpm
1466
934
1.76
1638
982
1534
938
1.83
1710
986
1606
944
1.91
1785
991
1680
949
2.00
1863
996
1758
955
2.09
1944
1001
1838
961
2.18
2029
1007
1922
967
2.27
2116
—
2010
974
2.37
2207
—
2100
—
—
—
—
2195
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.8
Bhp
1.95
2.03
2.11
2.20
2.29
2.38
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
1815
1891
1969
2051
2135
2223
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Rpm
1029
1033
1037
1041
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

2.0
Bhp
2.14
2.23
2.31
2.40
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
1996
2075
2157
2242
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

Refer to page 43 General Fan Performance Notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 2.40.

LEGEND
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 685 to 935 rpm. All other rpms require fieldsupplied drive.

41

Table 26 — Fan Performance, 50TFQ012 — Horizontal Discharge Units; Alternate Motor and Drive*
AIRFLOW
(Cfm)
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000

AIRFLOW
(Cfm)
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000

Rpm
523
536
549
562
575
588
601
614
628
641
655
668
682
696
710
723
737
751
765
779
793

0.2
Bhp
0.58
0.63
0.68
0.74
0.80
0.86
0.93
1.00
1.07
1.15
1.23
1.31
1.40
1.49
1.59
1.69
1.80
1.91
2.02
2.14
2.26

Rpm
830
837
843
850
858
865
873
881
889
898
907
916
925
934
944
954
—
—
—
—
—

1.2
Bhp
1.39
1.46
1.53
1.61
1.69
1.77
1.86
1.95
2.04
2.14
2.24
2.35
2.45
2.57
2.69
2.81
—
—
—
—
—

Watts
541
587
637
689
744
802
864
929
997
1069
1144
1223
1305
1392
1482
1577
1675
1778
1885
1996
2112

Watts
1298
1363
1431
1502
1576
1653
1733
1816
1904
1995
2089
2187
2289
2395
2504
2618
—
—
—
—
—

Rpm
592
603
614
626
637
649
661
673
685
697
709
722
734
747
760
773
785
798
812
825
838

Rpm
883
889
894
901
907
914
921
928
936
944
952
960
969
978
—
—
—
—
—
—
—

0.4
Bhp
0.73
0.78
0.84
0.90
0.96
1.03
1.10
1.17
1.25
1.33
1.42
1.51
1.60
1.70
1.80
1.90
2.01
2.13
2.25
2.37
2.50

1.4
Bhp
1.57
1.65
1.72
1.80
1.88
1.97
2.06
2.16
2.25
2.35
2.46
2.57
2.68
2.80
—
—
—
—
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Watts Rpm
Bhp
Watts Rpm
680
657
0.88
825
718
730
666
0.94
879
726
783
676
1.00
936
735
839
686
1.07
996
743
898
696
1.14
1059
752
961
707
1.21
1125
762
1026
717
1.28
1194
771
1095
728
1.36
1267
781
1167
739
1.44
1343
791
1243
750
1.53
1423
801
1322
761
1.61
1506
812
1405
773
1.71
1593
822
1492
784
1.80
1683
833
1582
796
1.91
1777
844
1677
808
2.01
1876
855
1775
820
2.12
1978
866
1877
832
2.24
2085
877
1984
844
2.35
2195
889
2095
856
2.48
2310
900
2210
869
2.61
2430
912
2330
881
2.74
2554
—

0.8
Bhp
1.05
1.11
1.17
1.24
1.31
1.39
1.47
1.55
1.64
1.72
1.82
1.92
2.02
2.12
2.23
2.35
2.46
2.59
2.71
2.85
—

Watts
977
1035
1096
1159
1226
1296
1369
1445
1525
1608
1695
1786
1880
1979
2081
2187
2297
2412
2531
2654
—

Rpm
775
783
790
798
806
815
823
832
841
850
860
870
880
890
900
910
921
932
—
—
—

1.0
Bhp
1.22
1.28
1.35
1.42
1.50
1.58
1.66
1.75
1.84
1.93
2.03
2.13
2.23
2.34
2.46
2.57
2.70
2.82
—
—
—

Watts
1135
1196
1260
1328
1398
1472
1548
1629
1712
1799
1890
1984
2082
2184
2290
2400
2514
2633
—
—
—

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Watts Rpm
Bhp
Watts
Rpm
1466
934
1.76
1638
982
1534
938
1.83
1710
986
1606
944
1.91
1785
991
1680
949
2.00
1863
996
1758
955
2.09
1944
1001
1838
961
2.18
2029
1007
1922
967
2.27
2116
1012
2010
974
2.37
2207
1019
2100
981
2.47
2302
1025
2195
988
2.57
2399
1032
2293
996
2.68
2501
—
2395
1004
2.80
2607
—
2500
—
—
—
—
2610
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—

1.8
Bhp
1.95
2.03
2.11
2.20
2.29
2.38
2.48
2.58
2.69
2.80
—
—
—
—
—
—
—
—
—
—
—

Watts
1815
1891
1969
2051
2135
2223
2314
2409
2507
2608
—
—
—
—
—
—
—
—
—
—
—

Rpm
1029
1033
1037
1041
1046
1051
1056
1062
—
—
—
—
—
—
—
—
—
—
—
—
—

2.0
Bhp
2.14
2.23
2.31
2.40
2.50
2.60
2.70
2.80
—
—
—
—
—
—
—
—
—
—
—
—
—

Watts
1996
2075
2157
2242
2331
2422
2516
2615
—
—
—
—
—
—
—
—
—
—
—
—
—

Refer to page 43 General Fan Performance Notes.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 2.90.

LEGEND
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 835 to 1085 rpm. All other rpms require fieldsupplied drive.

42

Table 27 — Fan Performance, 50TFQ012 — Horizontal Discharge Units; High-Static Motor and Drive*
AIRFLOW
(Cfm)
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000

AIRFLOW
(Cfm)
3000
3100
3200
3300
3400
3500
3600
3700
3800
3900
4000
4100
4200
4300
4400
4500
4600
4700
4800
4900
5000

Rpm
523
536
549
562
575
588
601
614
628
641
655
668
682
696
710
723
737
751
765
779
793

0.2
Bhp
0.58
0.63
0.68
0.74
0.80
0.86
0.93
1.00
1.07
1.15
1.23
1.31
1.40
1.49
1.59
1.69
1.80
1.91
2.02
2.14
2.26

Rpm
830
837
843
850
858
865
873
881
889
898
907
916
925
934
944
954
963
974
984
994
1005

1.2
Bhp
1.39
1.46
1.53
1.61
1.69
1.77
1.86
1.95
2.04
2.14
2.24
2.35
2.45
2.57
2.69
2.81
2.93
3.07
3.20
3.34
3.49

Watts
541
587
637
689
744
802
864
929
997
1069
1144
1223
1305
1392
1482
1577
1675
1778
1885
1996
2112

Watts
1298
1363
1431
1502
1576
1653
1733
1816
1904
1995
2089
2187
2289
2395
2504
2618
2736
2858
2985
3116
3251

Rpm
592
603
614
626
637
649
661
673
685
697
709
722
734
747
760
773
785
798
812
825
838

Rpm
883
889
894
901
907
914
921
928
936
944
952
960
969
978
986
996
1005
1014
1024
1034
1044

0.4
Bhp
0.73
0.78
0.84
0.90
0.96
1.03
1.10
1.17
1.25
1.33
1.42
1.51
1.60
1.70
1.80
1.90
2.01
2.13
2.25
2.37
2.50

1.4
Bhp
1.57
1.65
1.72
1.80
1.88
1.97
2.06
2.16
2.25
2.35
2.46
2.57
2.68
2.80
2.92
3.05
3.18
3.31
3.45
3.60
3.74

EXTERNAL STATIC PRESSURE (in. wg)
0.6
Watts Rpm
Bhp
Watts Rpm
680
657
0.88
825
718
730
666
0.94
879
726
783
676
1.00
936
735
839
686
1.07
996
743
898
696
1.14
1059
752
961
707
1.21
1125
762
1026
717
1.28
1194
771
1095
728
1.36
1267
781
1167
739
1.44
1343
791
1243
750
1.53
1423
801
1322
761
1.61
1506
812
1405
773
1.71
1593
822
1492
784
1.80
1683
833
1582
796
1.91
1777
844
1677
808
2.01
1876
855
1775
820
2.12
1978
866
1877
832
2.24
2085
877
1984
844
2.35
2195
889
2095
856
2.48
2310
900
2210
869
2.61
2430
912
2330
881
2.74
2554
923

0.8
Bhp
1.05
1.11
1.17
1.24
1.31
1.39
1.47
1.55
1.64
1.72
1.82
1.92
2.02
2.12
2.23
2.35
2.46
2.59
2.71
2.85
2.98

Watts
977
1035
1096
1159
1226
1296
1369
1445
1525
1608
1695
1786
1880
1979
2081
2187
2297
2412
2531
2654
2782

Rpm
775
783
790
798
806
815
823
832
841
850
860
870
880
890
900
910
921
932
942
953
965

1.0
Bhp
1.22
1.28
1.35
1.42
1.50
1.58
1.66
1.75
1.84
1.93
2.03
2.13
2.23
2.34
2.46
2.57
2.70
2.82
2.95
3.09
3.23

Watts
1135
1196
1260
1328
1398
1472
1548
1629
1712
1799
1890
1984
2082
2184
2290
2400
2514
2633
2756
2883
3014

EXTERNAL STATIC PRESSURE (in. wg)
1.6
Watts Rpm
Bhp
Watts
Rpm
1466
934
1.76
1638
982
1534
938
1.83
1710
986
1606
944
1.91
1785
991
1680
949
2.00
1863
996
1758
955
2.09
1944
1001
1838
961
2.18
2029
1007
1922
967
2.27
2116
1012
2010
974
2.37
2207
1019
2100
981
2.47
2302
1025
2195
988
2.57
2399
1032
2293
996
2.68
2501
1038
2395
1004
2.80
2607
1046
2500
1011
2.91
2716
1053
2610
1020
3.03
2828
1061
2723
1028
3.16
2946
1068
2840
1037
3.29
3067
1076
2962
1045
3.42
3192
1085
3088
1054
3.56
3322
1093
3219
1063
3.71
3456
1102
3353
1073
3.85
3594
1111
3492
1082
4.01
3737
1119

1.8
Bhp
1.95
2.03
2.11
2.20
2.29
2.38
2.48
2.58
2.69
2.80
2.91
3.03
3.15
3.27
3.40
3.54
3.67
3.82
3.96
4.12
4.27

Watts
1815
1891
1969
2051
2135
2223
2314
2409
2507
2608
2713
2822
2935
3052
3173
3297
3426
3560
3697
3839
3986

Rpm
1029
1033
1037
1041
1046
1051
1056
1062
1068
1074
1080
1087
1094
1101
1108
1115
1123
1131
1139
1148
1156

2.0
Bhp
2.14
2.23
2.31
2.40
2.50
2.60
2.70
2.80
2.91
3.03
3.14
3.26
3.39
3.52
3.65
3.79
3.93
4.08
4.23
4.38
4.55

Watts
1996
2075
2157
2242
2331
2422
2516
2615
2716
2821
2930
3042
3159
3279
3403
3531
3664
3801
3943
4088
4238

Refer to General Fan Performance Notes below.
NOTES:
1. Boldface indicates field-supplied drive is required.
2. Maximum continuous bhp is 5.25.

LEGEND
Bhp
— Brake Horsepower Input to Fan
Watts — Input Watts to Motor
*Motor drive range: 830 to 1130 rpm. All other rpms require fieldsupplied drive.

GENERAL NOTES FOR FAN PERFORMANCE DATA TABLES
1. Fan performance is based on clean filters and wet coil data.
2. Extensive motor and electrical testing on these units ensures
that the full range of the motor can be utilized with confidence.
Using fan motors up to the wattage ratings shown will not result
in nuisance tripping or premature motor failure. Unit warranty
will not be affected. For additional information on motor performance Table 9.

3. Values include losses for filters, unit casing, and wet coils. See
Tables 11A and 11B for static pressure information.
4. Use of a field-supplied motor may affect wire sizing. Contact
your Carrier representative for details.
5. Interpolation is permissible. Do not extrapolate.

43

PRE-START-UP

START-UP
Unit Preparation — Make sure that the unit has been
installed in accordance with installation instructions and
applicable codes.

Failure to observe the following warnings could result in
serious personal injury:
1. Follow recognized safety practices and wear protective goggles when checking or servicing refrigerant
system.
2. Do not operate the compressor or provide any electric
power to the unit unless the compressor terminal
cover is in place and secured.
3. Do not remove the compressor terminal cover until all
electrical sources are disconnected.
4. Relieve all pressure from the system before touching
or disturbing anything inside the compressor terminal
box if a refrigerant leak is suspected around the compressor terminals. Use accepted methods to recover
refrigerant.
5. Never attempt to repair a soldered connection while
the refrigerant system is under pressure.
6. Do not use a torch to remove any component. The
system contains oil and refrigerant under pressure. To
remove a component, wear protective goggles and
proceed as follows:
a. Shut off electrical power to the unit and tag
disconnect.
b. Relieve all pressure from the system using both
the high and low-pressure ports. Use accepted
methods to recover refrigerant.
c. Cut the component connection tubing with tubing
cutter, and remove the component from the unit.
d. Carefully unsweat the remaining tubing stubs
when necessary. Oil can ignite when exposed
to a torch flame.

Return-Air Filters — Make sure that the correct filters
are installed in the unit (see Table 1). Do not operate the unit
without return-air filters.
Outdoor-Air Inlet Screen — The outdoor-air inlet screen
must be in place before operating the unit.

Compressor Mounting — Compressors are internally
spring mounted. Do not loosen or remove the compressor holddown bolts.

Internal Wiring — Check all electrical connections in
unit control boxes; tighten as required.

Refrigerant Service Ports — Each refrigerant system
has 3 Schrader-type service gage ports: One on the suction line,
one on the cooling mode liquid line, and one on the compressor
discharge line. Be sure that the caps on the ports are tight.
The port on the cooling mode liquid line and one port on the
discharge line have protective devices installed on them.
HIGH FLOW REFRIGERANT VALVES — Two high flow
valves may be located on the hot gas tube coming out of the
compressor and the suction tube going into the compressor.
Large black plastic caps identify these valves with O-rings
inside screwing the cap and onto a brass body. No field access
to these valves is available at this time. Ensure the plastic caps
remain on the valves and are tight or the possibility of refrigerant leakage could occur.
Compressor Rotation — It is important to be certain
that the scroll compressor (size 012 only) is rotating in the
proper direction. To determine whether or not the compressor
is rotating in the proper direction:
1. Connect service gages to the suction and discharge pressure fittings.
2. Energize the compressor.
3. The suction pressure should drop and the discharge pressure should rise, as is normal on any start-up.
If the suction pressure does not drop and the discharge pressure does not rise to normal levels:
1. Note that the indoor fan is probably also rotating in the
wrong direction.
2. Turn off power to the unit and tag disconnect.
3. Reverse any two of the unit power leads.
4. Turn on power to the unit. Re-energize compressor.
The suction and discharge pressure levels should now move
to their normal start-up levels.
NOTE: When the compressor is rotating in the wrong
direction, the unit makes more noise and does not provide
heating/cooling.

Proceed as follows to inspect and prepare the unit for initial
start-up:
1. Remove all access panels.
2. Read and follow instructions on all WARNING, CAUTION, and INFORMATION labels attached to or
shipped with unit.
3. Make the following inspections:
a. Inspect for shipping and handling damages such
as broken lines, loose parts, or disconnected wires.
b. Inspect for oil at all refrigerant tubing connections
and on the unit base. Detecting oil generally indicates a refrigerant leak. Leak-test all refrigerant
tubing connections using an electronic leak detector, halide torch, or liquid-soap solution.
c. Inspect all field-wiring and factory-wiring connections. Be sure that connections are completed
and tight. Ensure that electrical wires do not
contact refrigerant tubing.
d. Inspect the coil fins. If damaged during shipping
and handling, carefully straighten the fins with a
fin comb.
4. Verify the following conditions:
a. Make sure that the outdoor-fan blades are
correctly positioned in the fan orifice. Refer to
Outdoor-Fan Adjustment section on page 48 for
more details.
b. Make sure that an air filter(s) is in place.
c. Make sure that the condensate drain trap is filled
with water to ensure proper drainage.
d. Make sure that all tools and miscellaneous loose
parts have been removed.

Cooling — To start the unit, turn on main power supply. Set
the system selector switch at COOL position and the fan switch
at AUTO position. Adjust the thermostat to a setting below room
temperature. The compressor starts on closure of the contactor.
Check the unit charge. Refer to Refrigerant Charge section
on page 48.
Reset the thermostat at a position above room temperature.
The compressor will shut off.
TO SHUT OFF UNIT — Set the system selector switch at
OFF position. Resetting the thermostat at a position above
room temperature shuts the unit off temporarily until the space
temperature exceeds the thermostat setting.
The compressor restart is accomplished by manual reset at
the thermostat by turning the selector switch to OFF position
and then ON position.
44

Heating — To start the unit, turn on the main power supply.

If field-installed accessory CO2 sensors are connected to the
EconoMi$er IV control, a demand controlled ventilation strategy will begin to operate. As the CO2 level in the zone increases
above the CO2 set point, the minimum position of the damper
will be increased proportionally. As the CO2 level decreases
because of the increase in fresh air, the outdoor-air damper will
be proportionally closed. Damper position will follow the higher demand condition from DCV mode or free cooling mode.
Damper movement from full closed to full open (or vice
versa) will take between 11/2 and 21/2 minutes.
If free cooling can be used as determined from the appropriate changeover command (switch, dry bulb, enthalpy curve,
differential dry bulb, or differential enthalpy), a call for cooling
(Y1 closes at the thermostat) will cause the control to modulate
the dampers open to maintain the supply-air temperature set
point at 50 to 55 F.
As the supply-air temperature drops below the set point
range of 50 to 55 F, the control will modulate the outdoor-air
dampers closed to maintain the proper supply-air temperature.
HEATING, UNITS WITH ECONOMI$ER IV — When the
room temperature calls for heat, the heating controls are energized as described in the Heating, Units Without Economizer
section. When the thermostat is satisfied, the economizer
damper moves to the minimum position.
COOLING, UNITS WITH ECONOMI$ER2, PREMIERLINK™ CONTROL AND A THERMOSTAT — When free
cooling is not available, the compressors will be controlled by
the PremierLink control in response to the Y1 and Y2 inputs
from the thermostat.
The PremierLink control will use the following information
to determine if free cooling is available:
• Indoor fan has been on for at least 30 seconds.
• The SPT, SAT, and OAT inputs must have valid readings.
• OAT must be less than 75 F.
• OAT must be less than SPT.
• Enthalpy must be LOW (may be jumpered if an enthalpy
sensor not available).
• Economizer position is NOT forced.
Pre-cooling occurs when the is no call from the thermostat
except G. Pre-cooling is defined as the economizer modulates
to provide 70 F supply air.
When free cooling is available the PremierLink control will
control the compressors and economizer to provide a supplyair temperature determined to meet the Y1 and Y2 calls from
the thermostat using the following three routines. The three
control routines are based on OAT, where:
SASP = Supply Air Set Point
DXCTLO = Direct Expansion Cooling Lockout Set Point
Routine 1 — (OAT < DXCTLO)
• Y1 energized — economizer maintains a SASP =
(SATLO1 + 3).
• Y2 energized — economizer maintains a SASP =
(SATLO2 + 3).
Routine 2 — (DXCTLO < OAT < 68 F)
• If only Y1 energized, the economizer maintains a SASP
= (SATLO1 + 3).
• If SAT > SASP + 5 and economizer position > 80%,
economizer will go to minimum position for 3 minutes or
until SAT > 68 F.
• First stage of mechanical cooling will be energized.
• Integrator resets.
• Economizer opens again and controls to current SASP
after stage one on for 90 seconds.
• With Y1 and Y2 energized Economizer maintains an
SASP = SATLO2 + 3.

Set the thermostat at HEAT position at a setting above room
temperature, the fan at AUTO position.
The first stage of the thermostat energizes the indoor-fan
motor, compressor, and outdoor fan; the second stage energizes
electric heater elements, if installed. Check the heating effects
at the air supply grille(s).
If the accessory electric heaters do not energize, reset limit
switch (located on indoor-fan scroll) by pressing the button
located between terminals on the switch.
TO SHUT OFF UNIT — Set the system selector switch at
OFF position. Resetting the heating selector lever below room
temperature temporarily shuts the unit off until the space
temperature falls below the thermostat setting.

Safety Relief — A soft solder joint on the suction line at
the loss-of-charge/low-pressure fitting provides pressure relief
under abnormal temperature and pressure conditions.

Ventilation (Continuous Fan) — Set the fan and system
selector switches at ON and OFF positions, respectively. The indoor fan operates continuously to provide constant air circulation.
Operating Sequence
COOLING, UNITS WITHOUT ECONOMIZER — When
thermostat calls for cooling, terminals G and Y1 are energized.
The indoor-fan contactor (IFC), reversing valve solenoid
(RVS1) and compressor contactor no. 1 (C1) are energized and
indoor-fan motor, compressor no. 1, and outdoor fan starts. The
outdoor-fan motor(s) run continuously while unit is cooling. If
the thermostat calls for a second stage of cooling by energizing
Y2, compressor contactor no. 2 (C2) and reversing valve solenoid (RVS2) are energized and compressor no. 2 starts.
HEATING, UNITS WITHOUT ECONOMIZER — Upon a
request for heating from the space thermostat, terminal W1 will
be energized with 24 v. The IFC, outdoor-fan contactor (OFC),
C1, and C2 will be energized. The reversing valves switch position and the indoor fan, outdoor fan, compressor no. 1, and
compressor no. 2 are energized.
If the space temperature continues to fall while W1 is energized, W2 will be energized with 24 v, and the heater contactor(s) (HC) will be energized, which will energize the electric
heater(s).
When the space thermostat is satisfied, W2 will be deenergized first, and the electric heater(s) will be deenergized.
Upon a further rise in space temperature, W1 will be
deenergized, and the reversing valve solenoids (RVS1 and
RVS2) will be energized.
COOLING, UNITS WITH ECONOMI$ER IV — When free
cooling is not available, the compressors will be controlled by
the zone thermostat. When free cooling is available, the
outdoor-air damper is modulated by the EconoMi$er IV control to provide a 50 to 55 F supply-air temperature into the
zone. As the supply-air temperature fluctuates above 55 or
below 50 F, the dampers will be modulated (open or close)
to bring the supply-air temperature back within set point limits.
For EconoMi$er IV operation, there must be a thermostat
call for the fan (G). This will move the damper to its minimum
position during the occupied mode.
Above 50 F supply-air temperature, the dampers will modulate from 100% open to the minimum open position. From 50 F
to 45 F supply-air temperature, the dampers will maintain at
the minimum open position. Below 45 F the dampers will be
completely shut. As the supply-air temperature rises, the dampers will come back open to the minimum open position once
the supply-air temperature rises to 48 F.
If optional power exhaust is installed, as the outdoor-air
damper opens and closes, the power exhaust fans will be energized and deenergized.
45

The economizer set point will always be at least one degree
below the cooling set point, allowing for a smooth transition
from mechanical cooling with economizer assist, back to
economizer cooling as the cooling set point is achieved.
The compressors may be used for initial cooling then the
PremierLink controller will modulate the economizer using an
error reduction calculation to hold the space temperature
between the heating and cooling set points. See Fig. 42.
The controller uses the following conditions to determine
economizer cooling:
• Enthalpy is Low
• SAT reading is available
• OAT reading is available
• SPT reading is available
• OAT ≤SPT
• Economizer Position is NOT forced
If any of the above conditions are not met, the economizer
submaster reference (ECSR) is set to maximum limit and the
damper moves to minimum position. The operating sequence
is complete. The ECSR is recalculated every 30 seconds.
If an optional power exhaust is installed, as the outdoor-air
damper opens and closes, the power exhaust fans will be
energized and deenergized.
If field-installed accessory CO2 sensors are connected to
the PremierLink control, a PID-controlled demand ventilation
strategy will begin to operate. As the CO2 level in the zone
increases above the CO2 set point, the minimum position of the
damper will be increased proportionally. As the CO2 level
decreases because of the increase in fresh air, the outdoor-air
damper will be proportionally closed.

• If SAT > SASP + 5 and economizer position >80%,
economizer will go to minimum position for 3 minutes or
until SAT > 68 F.
• If compressor no. 1 is on then second stage of mechanical cooling will be energized. Otherwise the first stage
will be energized.
• Integrator resets.
• Economizer opens again and controls to SASP after
stage one on for 90 seconds.
Routine 3 — (OAT > 68)
• Economizer is opened 100%.
• Compressors 1 and 2 are cycled based on Y1 and Y2
using minimum on and off times and watching the supply air temperature as compared to SATLO1 and
SATLO2 set points.
If optional power exhaust is installed, as the outdoor-air
damper opens and closes, the power exhaust fans will be energized and deenergized.
If field-installed accessory CO2 sensors are connected to the
PremierLink™ control, a PID-controlled demand ventilation
strategy will begin to operate. As the CO2 level in the zone
increases above the CO2 set point, the minimum position of the
damper will be increased proportionally. As the CO2 level
decreases because of the increase in fresh air, the outdoor-air
damper will be proportionally closed.
HEATING, UNITS WITH ECONOMI$ER2, PREMIERLINK CONTROL AND A THERMOSTAT — When the
thermostat calls for heating, terminal W1 is energized. The
PremierLink control will move the economizer damper to the
minimum position if there is a call for G and closed if there is a
call for W1 without G. In order to prevent thermostat from short
cycling, the unit is locked into the heating mode for at least
10 minutes when W1 is energized.
COOLING, UNITS WITH ECONOMI$ER2, PREMIERLINK CONTROL AND A ROOM SENSOR — When free
cooling is not available, the compressors will be controlled by
the PremierLink controller using a PID (proportional integral)
Error reduction calculation as indicated by Fig. 41.
The PremierLink controller will use the following information to determine if free cooling is available:
• Indoor fan has been on for at least 30 seconds.
• The SPT, SAT, and OAT inputs must have valid readings.
• OAT must be less than 75 F.
• OAT must be less than SPT.
• Enthalpy must be LOW (may be jumpered if and
enthalpy sensor is not available).
• Economizer position is NOT forced.
When free cooling is available, the outdoor-air damper is
positioned through the use of a Proportional Integral (PID)
control process to provide a calculated supply-air temperature
into the zone. The supply air will maintain the space temperature between the heating and cooling set points as indicated in
Fig. 42.
The PremierLink control will integrate the compressor
stages with the economizer based on similar logic as the three
routines listed in the previous section. The SASP will float up
and down based on the error reduction calculations that compare space temperature and space set point.
When outside-air temperature conditions require the economizer to close for a compressor stage-up sequence, the economizer control integrator is reset to zero after the stage-up sequence is completed. This prevents the supply-air temperature
from dropping too quickly and creating a freeze condition that
would make the compressor turn off prematurely.
The high space set point is used for DX (direct expansion)
cooling control, while the economizer space set point is a
calculated value between the heating and cooling set points.

SPACE TEMPERATURE

TEMPERATURE CONTROL
75
74
73
72

SET POINT
TEMPERATURE

71
70
69
68
TIME

NOTE: PremierLink control performs smart staging of 2 stages of DX
cooling and up to 3 stages of heat.

Fig. 41 — DX Cooling Temperature
Control Example

SPACE TEMPERATURE

TEMPERATURE CONTROL
75
74
73
72

COOL SETPOINT
TEMPERATURE
HEAT SETPOINT

71
70
69
68
TIME

Fig. 42 — Economizer Temperature
Control Example
46

6. Secure the sections together. Reposition the coil sections,
and remove the coil corner post from between the top
panel and center post. Install the coil corner post and coil
center post, and replace all screws.
CONDENSATE DRAIN — Check and clean each year at the
start of cooling season. In winter, keep the drain dry or protect
it against freeze-up.

HEATING, UNIT WITH ECONOMI$ER2, PREMIERLINK™
CONTROL AND A ROOM SENSOR — Every 40 seconds
the controller will calculate the required heat stages (maximum
of 3) to maintain supply air temperature (SAT) if the following
qualifying conditions are met:
• Indoor fan has been on for at least 30 seconds.
• COOL mode is not active.
• OCCUPIED, TEMP.COMPENSATED START or HEAT
mode is active.
• SAT reading is available.
• Fire shutdown mode is not active.
If all of the above conditions are met, the number of heat
stages is calculated; otherwise the required number of heat
stages will be set to 0.
If the PremierLink controller determines that heat stages are
required, the economizer damper will be moved to minimum
position if occupied and closed if unoccupied.

SERVICE

When servicing the unit, shut off all electrical power to the
unit to avoid shock hazard or injury from rotating parts.

Cleaning — Inspect the unit interior at the beginning of each
heating and cooling season or as operating conditions require.
INDOOR COIL
1. Turn off the unit power and tag disconnect. Remove the
filter access panel and indoor coil access panel.
2. If an economizer or accessory two-position damper is
installed, remove the economizer or two-position damper
by disconnecting the economizer plug and removing the
mounting screws.
3. Slide the filters out of the unit.
4. Clean the coil using a commercial coil cleaner or dishwasher detergent in a pressurized spray canister. Wash
both sides of the coil and flush with clean water. For best
results, backflush toward the return-air section to remove
foreign material.
5. Flush the condensate pan after completion.
6. Reinstall the economizer/two-position damper and filters.
7. Reconnect the wiring.
8. Replace the access panels.
OUTDOOR COILS — Inspect the coils monthly. Clean
condenser coils annually, and as required by location and
outdoor-air conditions.
Clean 2-row coils as follows:
1. Turn off the unit power and tag disconnect.
2. Remove the top panel screws on the outdoor end of the
unit.
3. Remove the outdoor coil corner post. See Fig. 43. To hold
the top panel open, place the coil corner post between the
top panel and the center post. See Fig. 44.
4. Remove the device holding the coil sections together at
the return end of the outdoor coil. Carefully separate the
outer coil section 3 to 4 in. from the inner coil section.
See Fig. 45.
5. Use a water hose or other suitable equipment to flush
down between the 2 coil sections to remove dirt and
debris. Clean the outer surfaces with a stiff brush in the
normal manner.

Fig. 43 — Cleaning Outdoor Coil

Fig. 44 — Propping Up Top Panel

Fig. 45 — Separating Coil Sections

47

Unit panels must be in place when the unit is operating
during charging procedure.
NO CHARGE — Use standard evacuating techniques. After
evacuating the system, weigh in the specified amount of refrigerant (refer to Table 1).
LOW CHARGE COOLING — Use the Cooling Charging
Charts, Fig. 47-49. Vary the refrigerant until the conditions of
the appropriate chart are met. Note that the charging charts are
different from the type normally used. Charts are based on
charging the units to the correct superheat for the various operating conditions. An accurate pressure gage and temperature
sensing device are required. Connect the pressure gage to the
service port on the suction line. Mount the temperature sensing
device on the suction line and insulate it so that outdoor ambient temperature does not affect the reading. Indoor-air cfm
must be within the normal operating range of the unit.
TO USE COOLING CHARGING CHARTS — Take the outdoor ambient temperature and read the suction pressure gage.
Refer to the appropriate chart to determine what the suction
temperature should be. If the suction temperature is high, add
refrigerant. If the suction temperature is low, carefully recover
some of the charge. Recheck the suction pressure as charge is
adjusted.
EXAMPLE: (Fig. 47)
Outdoor Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85 F
Suction Pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70 psig
Suction Temperature should be . . . . . . . . . . . . . . . . . . . . . 49 F
(Suction Temperature may vary ±5° F.)
HEATING CHARGE — Do not attempt to adjust refrigerant
charge while the unit is operating in the heating mode. If the
charge amount is believed to be incorrect, recover refrigerant
and weigh in the amount listed on the unit rating plate.

FILTERS — Clean or replace at the start of each heating and
cooling season, or more often if operating conditions require it.
Replacement filters must be the same dimensions as original
filters.
OUTDOOR-AIR INLET SCREEN — Clean the screen with
steam or hot water and a mild detergent. Do not use disposable
filters in place of screens.

Lubrication
COMPRESSORS — Each compressor is charged with correct
amount of oil at the factory.
FAN MOTOR BEARINGS — Fan motor bearings are permanently lubricated. No further lubrication of outdoor or
indoor-fan motors is required.

Outdoor Fan Adjustment (Fig. 46)
1. Shut off the unit power supply and tag disconnect.
2. Remove the outdoor-fan assembly (grille, motor, motor
cover, and fan) and loosen the fan hub setscrews.
3. Adjust the fan height as shown in Fig. 46.
4. Tighten the setscrews and replace the outdoor-fan assembly.

UNIT
VOLTAGE
208/230 V
460 V and 575 V

“A”
in.
2.75
3.50

Replacement Parts — A complete list of replacement
parts can be obtained from any Carrier distributor.

Fig. 46 — Outdoor Fan Adjustment

Blower Belt Adjustment — Inspect the blower belt
for wear, proper belt tension, and pulley alignment as conditions require or at the beginning of each heating and air conditioning season.
Refer to Step 7 — Adjust Indoor-Fan Speed on page 25 for
adjustment and alignment procedures.
High-Pressure Switch — Located on the compressor
hot gas line is a high-pressure switch, which contains a
Schrader core depressor. This switch opens at 428 psig and
closes at 320 psig. No adjustment is necessary. Refer to
Table 1.

Loss-of-Charge Switch — Located on the outdoor liquid line is a low-pressure switch which functions as a loss-ofcharge switch. This switch contains a Schrader core depressor.
This switch opens at 7 psig and closes at 22 psig. No adjustment is necessary. Refer to Table 1.

Freezestat — Located on the “hair pin” end of the indoor
coil is a bimetal temperature sensing switch. This switch protects the evaporator coil from freeze-up due to lack of airflow.
The switch opens at 30 F and closes at 45 F. No adjustment is
necessary. Refer to Table 1.

Refrigerant Charge — The amount of refrigerant charge
is listed on the unit nameplate (also refer to Table 1). Refer to
Carrier Refrigerant Service Techniques Manual, Refrigerants
section.

Fig. 47 — Cooling Charging Chart, 50TFQ008

48

Fig. 49 — Cooling Charging Chart, 50TFQ012

Fig. 48 — Cooling Charging Chart, 50TFQ009

TROUBLESHOOTING

11. Set enthalpy potentiometer to D.
12. Apply power (24 vac) to terminals TR and TR1.
DIFFERENTIAL ENTHALPY — To check differential
enthalpy:
1. Make sure EconoMi$er IV preparation procedure has
been performed.
2. Place 620-ohm resistor across SO and +.
3. Place 1.2 kilo-ohm resistor across SR and +. The Free
Cool LED should be lit.
4. Remove 620-ohm resistor across SO and +. The Free
Cool LED should turn off.
5. Return EconoMi$er IV settings and wiring to normal
after completing troubleshooting.
SINGLE ENTHALPY — To check single enthalpy:
1. Make sure EconoMi$er IV preparation procedure has
been performed.
2. Set the enthalpy potentiometer to A (fully CCW). The
Free Cool LED should be lit.
3. Set the enthalpy potentiometer to D (fully CW). The Free
Cool LED should turn off.
4. Return EconoMi$er IV settings and wiring to normal
after completing troubleshooting.
DCV (DEMAND CONTROLLED VENTILATION) AND
POWER EXHAUST — To check DCV and Power Exhaust:
1. Make sure EconoMi$er IV preparation procedure has
been performed.
2. Ensure terminals AQ and AQ1 are open. The LED for
both DCV and Exhaust should be off. The actuator
should be fully closed.
3. Connect a 9-v battery to AQ (positive node) and AQ1
(negative node). The LED for both DCV and Exhaust
should turn on. The actuator should drive to between 90
and 95% open.
4. Turn the Exhaust potentiometer CW until the Exhaust
LED turns off. The LED should turn off when the
potentiometer is approximately 90%. The actuator should
remain in position.

Unit Troubleshooting — For unit troubleshooting, refer to Fig. 50 and Table 28.

EconoMi$er IV Troubleshooting — See Table 29
for EconoMi$er IV logic.
A functional view of the EconoMi$er IV is shown in
Fig. 51. Typical settings, sensor ranges, and jumper positions
are also shown. An EconoMi$er IV simulator program is available from Carrier to help with EconoMi$er IV training and
troubleshooting.
ECONOMI$ER IV PREPARATION — This procedure is
used to prepare the EconoMi$er IV for troubleshooting. No
troubleshooting or testing is done by performing the following
procedure.
NOTE: This procedure requires a 9-v battery, 1.2 kilo-ohm
resistor, and a 5.6 kilo-ohm resistor which are not supplied
with the EconoMi$er IV.
IMPORTANT: Be sure to record the positions of all potentiometers before starting troubleshooting.
1. Disconnect power at TR and TR1. All LEDs should be
off. Exhaust fan contacts should be open.
2. Disconnect device at P and P1.
3. Jumper P to P1.
4. Disconnect wires at T and T1. Place 5.6 kilo-ohm resistor
across T and T1.
5. Jumper TR to 1.
6. Jumper TR to N.
7. If connected, remove sensor from terminals SO and +.
Connect 1.2 kilo-ohm 4074EJM checkout resistor across
terminals SO and +.
8. Put 620-ohm resistor across terminals SR and +.
9. Set minimum position, DCV set point, and exhaust
potentiometers fully CCW (counterclockwise).
10. Set DCV maximum position potentiometer fully CW
(clockwise).
49

2. Set the Enthalpy potentiometer to A. The Free Cool LED
turns on. The actuator should drive to between 20 and
80% open.
3. Remove the 5.6 kilo-ohm resistor and jumper T to T1.
The actuator should drive fully open.
4. Remove the jumper across T and T1. The actuator should
drive fully closed.
5. Return EconoMi$er IV settings and wiring to normal
after completing troubleshooting.
ECONOMI$ER IV TROUBLESHOOTING COMPLETION — This procedure is used to return the EconoMi$er IV
to operation. No troubleshooting or testing is done by performing the following procedure.
1. Disconnect power at TR and TR1.
2. Set enthalpy potentiometer to previous setting.
3. Set DCV maximum position potentiometer to previous
setting.
4. Set minimum position, DCV set point, and exhaust
potentiometers to previous settings.
5. Remove 620-ohm resistor from terminals SR and +.
6. Remove 1.2 kilo-ohm checkout resistor from terminals
SO and +. If used, reconnect sensor from terminals SO and
+.
7. Remove jumper from TR to N.
8. Remove jumper from TR to 1.
9. Remove 5.6 kilo-ohm resistor from T and T1. Reconnect
wires at T and T1.
10. Remove jumper from P to P1. Reconnect device at P and
P1.
11. Apply power (24 vac) to terminals TR and TR1.

5. Turn the DCV set point potentiometer CW until the DCV
LED turns off. The DCV LED should turn off when the
potentiometer is approximately 9 v. The actuator should
drive fully closed.
6. Turn the DCV and Exhaust potentiometers CCW until
the Exhaust LED turns on. The exhaust contacts will
close 30 to 120 seconds after the Exhaust LED turns on.
7. Return EconoMi$er IV settings and wiring to normal
after completing troubleshooting.
DCV MINIMUM AND MAXIMUM POSITION — To check
the DCV minimum and maximum position:
1. Make sure EconoMi$er IV preparation procedure has
been performed.
2. Connect a 9-v battery to AQ (positive node) and AQ1
(negative node). The DCV LED should turn on. The
actuator should drive to between 90 and 95% open.
3. Turn the DCV Maximum Position potentiometer to midpoint. The actuator should drive to between 20 and 80%
open.
4. Turn the DCV Maximum Position potentiometer to fully
CCW. The actuator should drive fully closed.
5. Turn the Minimum Position potentiometer to midpoint.
The actuator should drive to between 20 and 80% open.
6. Turn the Minimum Position Potentiometer fully CW. The
actuator should drive fully open.
7. Remove the jumper from TR and N. The actuator should
drive fully closed.
8. Return EconoMi$er IV settings and wiring to normal
after completing troubleshooting.
SUPPLY-AIR INPUT — To check supply-air input:
1. Make sure EconoMi$er IV preparation procedure has
been performed.

50

LEGEND
C
—
CAP
—
CB
—
CLO
—
COMP —
DB
—
DFT
—
EQUIP —
FPT
—
HC
—
HPS
—
HR
—
IFC
—
IFM
—
IFMOVL —
LPS
—

Contactor, Compressor
Capacitor
Circuit Breaker
Compressor Lockout
Compressor Motor
Defrost Board
Defrost Thermostat
Equipment
Freeze Protection Thermostat
Heater Contactor
High-Pressure Switch
Heater Relay
Indoor-Fan Contactor
Indoor-Fan Motor
Indoor-Fan Motor Overload Switch
Low-Pressure Switch

LSM
MCA
MTR
OFC
OFM
P
PL
QT
SAT
RVS
TRAN

—
—
—
—
—
—
—
—
—
—
—

Limit Switch (Manual Reset)
Minimum Circuit Amps
Motor
Outdoor-Fan Contactor
Outdoor-Fan Motor
Plug
Plug Assembly
Quadruple Terminal
Supply Air Thermostat
Reversing Valve Solenoid
Transformer
Field Splice
Marked Wire

Terminal (Marked)
Terminal (Unmarked)
Terminal Block
Splice
Splice (Marked)
Factory Wiring
Field Control Wiring
Field Power Wiring
Accessory or Optional Wiring
To indicate common potential only,
not to represent wiring

Fig. 50 — Typical Unit Wiring Schematic (208/203-3-60 Unit Shown)
51

Table 28 — Heating and Cooling Troubleshooting
PROBLEM
Compressor and Outdoor Fan
Will Not Start.

Compressor Will Not Start But
Outdoor Fan Runs.

Compressor Cycles (Other Than
Normally Satisfying Thermostat).

Compressor Operates Continuously.

Excessive Head Pressure.

Head Pressure Too Low.

Excessive Suction Pressure.

Suction Pressure Too Low.

Compressor No. 2 Will Not Run.

CAUSE
Power failure.
Fuse blown or circuit breaker tripped.
Defective thermostat, contactor, transformer, or
control relay.
Insufficient line voltage.
Incorrect or faulty wiring.
Thermostat setting too high.
High-pressure switch tripped.
Low-pressure switch tripped.
Freeze-up protection thermostat tripped.
Faulty wiring or loose connections in compressor
circuit.
Compressor motor burned out, seized, or internal
overload open.
Defective overload.
One leg of 3-phase power dead.
Refrigerant overcharge or undercharge.
Defective compressor.
Insufficient line voltage.
Blocked outdoor coil or dirty air filter.
Defective overload.
Defective thermostat.
Faulty outdoor-fan (cooling) or indoor-fan (heating)
motor or capacitor.
Restriction in refrigerant system.
Dirty air filter.
Unit undersized for load.
Thermostat set too low.
Low refrigerant charge.
Leaking valves in compressor.
Air in system.
Outdoor coil dirty or restricted.
Dirty air filter.
Dirty outdoor coil.
Refrigerant overcharged.
Air in system.
Condensing air restricted or air short-cycling.
Low refrigerant charge.
Compressor valves leaking.
Restriction in liquid tube.
High heat load.
Compressor valves leaking.
Refrigerant overcharged.
Dirty air filter (cooling) or dirty outdoor coil
(heating).
Low refrigerant charge.
Metering device or low side restricted
Insufficient indoor airflow (cooling mode).
Temperature too low in conditioned area.
Field-installed filter drier restricted.
Outdoor ambient temperature below 25 F.
Unit in economizer mode.

52

REMEDY
Call power company.
Replace fuse or reset circuit breaker.
Replace component.
Determine cause and correct.
Check wiring diagram and rewire correctly.
Lower thermostat setting below room
temperature.
See problem ‘‘Excessive Head Pressure.’’
Check for leaks, repair, and recharge.
See problem ‘‘Suction Pressure Too Low.’’
Check wiring and repair or replace.
Determine cause. Replace compressor.
Determine cause and replace.
Replace fuse or reset circuit breaker.
Determine cause.
Recover refrigerant, evacuate system, and
recharge to nameplate.
Replace and determine cause.
Determine cause and correct.
Determine cause and correct.
Determine cause and replace.
Replace thermostat.
Replace.
Locate restriction and remove.
Replace filter.
Decrease load or increase unit size.
Reset thermostat.
Locate leak, repair, and recharge.
Replace compressor.
Recover refrigerant, evacuate system, and
recharge.
Clean coil or remove restriction.
Replace filter.
Clean coil.
Remove excess refrigerant.
Recover refrigerant, evacuate system, and
recharge.
Determine cause and correct.
Check for leaks, repair, and recharge.
Replace compressor.
Remove restriction.
Check for source and eliminate.
Replace compressor.
Recover excess refrigerant.
Replace filter or clean coil.
Check for leaks, repair, and recharge.
Remove source of restriction.
Increase air quantity. Check filter and replace if
necessary.
Reset thermostat.
Replace.
Install low-ambient kit.
Proper operation; no remedy necessary.

Table 29 — EconoMi$er IV Input/Output Logic

Demand Control
Ventilation (DCV)
Below set
(DCV LED Off)

Above set
(DCV LED On)

INPUTS
Enthalpy*
Outdoor

OUTPUTS
N Terminal†
Occupied
Unoccupied
Stage Stage
1
2
Damper
On
On
Minimum position
Closed
On
Off
Off
Off
On
Off
Modulating** (between min.
Modulating** (between
position and full-open)
closed and full-open)
Off
Off
Off
Off
Minimum position
Closed
On
On
Modulating†† (between min. Modulating†† (between
position and DCV maximum) closed and DCV
On
Off
maximum)
Off
Off
On
Off
Modulating***
Modulating†††
Off
Off
Off
Off
Compressor

Return

High
(Free Cooling LED Off)

Low

Low
(Free Cooling LED On)

High

High
(Free Cooling LED Off)

Low

Low
(Free Cooling LED On)

High

Y1

Y2

On
On
Off
On
On
Off
On
On
Off
On
On
Off

On
Off
Off
On
Off
Off
On
Off
Off
On
Off
Off

***Modulation is based on the greater of DCV and supply-air sensor signals, between minimum position and either maximum
position (DCV) or fully open (supply-air signal).
†††Modulation is based on the greater of DCV and supply-air sensor signals, between closed and either maximum position (DCV)
or fully open (supply-air signal).

*For single enthalpy control, the module compares outdoor
enthalpy to the ABCD set point.
†Power at N terminal determines Occupied/Unoccupied setting:
24 vac (Occupied), no power (Unoccupied).
**Modulation is based on the supply-air sensor signal.
††Modulation is based on the DCV signal.

Fig. 51 — EconoMi$er IV Functional View

53

INDEX
Access panels 18
Barometric flow capacity 20
Carrier Comfort Network 14
Charging chart, refrigerant 48, 49
Clearance 3, 6
CO2 sensor
Configuration 25
Settings 23, 25
Compressor
Mounting 44
Rotation 44
Condensate drain
Cleaning 47
Location 3
Control circuit
Wiring 12
Wiring raceway 12
Convenience outlet 10, 11, 13
Defrost board 12, 13
Demand control ventilation 24
Dehumidification 25
Dimensions 2, 6
Ductwork 3
EconoMi$er2 18
Components 18
4 to 20 mA control 20
Wiring 20
EconoMi$er IV 18-25
Components 18
Damper 24
Dry bulb changeover 21
Enthalpy changeover 22
Inputs and outputs 53
Troubleshooting 49, 50
Wiring 19
Electrical connections 7
Electrical data 8-11
Electric heat 8
Enthalpy changeover set points 23
Factory-installed options 12-25
Convenience outlet 13
EconoMi$er2 18-20
EconoMi$er IV 18-25
Manual outdoor air damper 13
Novar controls 13
PremierLink™ controls 14-16
Filter
Cleaning 48
Installation 19
Size 5
Freeze protection thermostat 5, 48
Heat anticipator settings 12, 13
High flow valves 44
High pressure switch 5, 48
Horizontal units 3
Indoor air quality 14, 22
Indoor coil 5
Cleaning 47
Indoor fan motor 5
Lubrication 48
Motor data 26
Performance 28-43
Pulley adjustment 26
Pulley setting 5, 27
Speed 5
Low pressure switch 5, 48
Manual outdoor air damper 13
Mounting
Compressor 44
Unit 3
Novar controls 13

Operating sequence
Cooling 45
EconoMi$er2 45-47
EconoMi$er IV 45
Heating 45
Outdoor air hood 14, 19
Outdoor air inlet screens 44
Cleaning 48
Outdoor coil 5
Cleaning 47
Outdoor fan 5
Adjustment 48
Physical data 5
Potentiometer 22
Power supply
Wiring 7
PremierLink controls 14-16
Pressure, drop
Electric heat 27
Return air 20
Outdoor air 20
Pre-start-up 44
Pressure switches
High pressure 5
Low pressure 5
Refrigerant
Charge 5, 48, 49
Type 5
Refrigerant service ports 44
Replacement parts 48
Return air filter 5, 44
Return air temperature sensor 22
Rigging unit 3, 4
Roof curb
Assembly 1
Dimensions 2
Connector package 2
Leveling tolerances 3
Weight 5
Safety considerations 1
Safety relief 45
Service 47-49
Service ports 44
Slab mount 3
Start-up 44-47
Start-up checklist CL-1
Supply-air temperature sensor 14, 21
Thermostat 12, 24
Troubleshooting 49-53
Ventilation 45
Weight
Corner 6
EconoMi$er IV 5, 6
Unit 4-6
Wiring
4 to 20 mA control 20
EconoMi$er2 20
EconoMi$er IV 19
Power connections 7
PremierLink 16
Thermostat 12
Unit 51

Copyright 2005 Carrier Corporation
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53500019-01
Printed in U.S.A.
Form 50TFQ-9SI
Pg 54
9-05
Replaces: 50TFQ-7SI
Book 1 4
Tab 5a 5a

I. PRELIMINARY INFORMATION
MODEL NO.: __________________________________
DATE: ________________________________________
BUILDING LOCATION: _________________________

SERIAL NO.: ______________________________________
TECHNICIAN: _____________________________________

II. PRE-START-UP (insert checkmark in box as each item is completed)
















VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS
CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS
CHECK THAT RETURN (INDOOR) AIR FILTERS ARE CLEAN AND IN PLACE
VERIFY THAT UNIT INSTALLATION IS LEVEL
CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW
TIGHTNESS
CHECK PULLEY ALIGNMENT AND BELT TENSION PER INSTALLATION INSTRUCTIONS
VERIFY INSTALLATION OF ECONOMIZER HOOD (IF EQUIPPED)

III. START-UP:
ELECTRICAL
SUPPLY VOLTAGE
CIRCUIT 1 COMPRESSOR AMPS
CIRCUIT 2 COMPRESSOR AMPS
INDOOR-FAN AMPS

L1-L2
L1
L1
L1

L2-L3
L2
L2
L2

L3-L1
L3
L3
L3

TEMPERATURES
OUTDOOR-AIR TEMPERATURE

DB

WB

RETURN-AIR TEMPERATURE

DB

WB

COOLING SUPPLY AIR

DB

WB

PRESSURES (COOLING MODE)
REFRIGERANT SUCTION, CIRCUIT 1

PSIG

F

REFRIGERANT SUCTION, CIRCUIT 2

PSIG

F

REFRIGERANT DISCHARGE, CIRCUIT 1

PSIG

F

REFRIGERANT DISCHARGE, CIRCUIT 2

PSIG

F






VERIFY THAT 3-PHASE SCROLL COMPRESSOR IS ROTATING IN THE CORRECT DIRECTION (SIZE 012 ONLY)
VERIFY REFRIGERANT CHARGE USING COOLING CHARGING CHARTS ON PAGES 48 AND 49.

GENERAL
SET ECONOMIZER MINIMUM VENT AND CHANGEOVER SETTINGS TO MATCH JOB REQUIREMENTS
(IF EQUIPPED)




Copyright 2005 Carrier Corporation
Book
Tab

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
1 4
Catalog No. 04-53500019-01
Printed in U.S.A.
Form 50TFQ-9SI
Pg CL-1
9-05
Replaces: 50TFQ-7SI
5a 5a

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - CUT ALONG DOTTED LINE
CUT ALONG DOTTED LINE

START-UP CHECKLIST
(Remove and Store in Job File)



---

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