Carrier 50TFQ008-012 User Manual

Single-Package Rooftop

Heat Pump Units

Installation, Start-Up and

Service Instructions

50TFQ008-012

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.

Book 1 4 Ta b 5 a 5 a

Catalog No. 04-53500019-01 Printed in U.S.A. Form 50TFQ-9SI Pg 1 9-05 Replaces: 50TFQ-7SI

Fig. 1 — Roof Curb Details

MAXIMUM ALLOWABLE

DIFFERENCE (in.)

A-B B-C A-C

0.5 1.0 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 verti-

cal 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.

Step 3 — Install Condensate Drain Line and External Trap —

ed 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 sion. 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,

Condensate drain connections are locat-

/2-in. socket drive exten-

pitch the line away from the unit at

/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: and base rails on each side and in front of the unit; 3 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.

DRAIN OUTLET

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

Fig. 3 — Condensate Drain Pan (Side View)

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

Fig. 4 — Condensate Drain Piping Details

/4-in. clearance between the roof curb

DRAIN PLUGHORIZONTAL

/16-in.

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.

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

50TFQ

008 940 426 77.42 1966.5 41.5 1054 42.12 1070 009 965 438 77.42 1966.5 41.5 1054 42.12 1070 012 1015 460 77.42 1966.5 41.5 1054 42.12 1070

WEIGHT A B C

Lb Kg in. mm in. mm in. mm

Table 1 — Physical Data

NOMINAL CAPACITY (tons) 7

UNIT SIZE 50TFQ 008 009 012

OPERATING WEIGHT (lb)

Unit 940 965 1015 Economizer

EconoMi$er IV 75 75 75

Roof Curb* 143 143 143

COMPRESSOR (Hermetic) Reciprocating Scroll

Quantity 222 Oil (oz) 45 ea 54 ea 54 ea

REFRIGERANT TYPE R-22

Operating Charge (lb-oz)

Circuit 1 5-14 8- 6 7-14 Circuit 2 5-13 8-13 8- 3

OUTDOOR COIL Enhanced Copper Tubes, Aluminum Lanced Fins, Acutrol™ Feed Device

Rows...Fins/in. 1...17 2...17 2...17 Total Face Area (sq ft) 20.50 18.00 18.30

OUTDOOR FAN Propeller Type

Nominal Cfm 6500 6500 6500 Quantity...Diameter (in.) 2...22 2...22 2...22 Motor Hp...Rpm Watts Input (Total) 500 500 500

INDOOR COIL Enhanced Copper Tubes, Aluminum Double-Wavy Fins, Acutrol Feed Device

Rows...Fins/in. 3...15 3...15 3...15 Total Face Area (sq ft) 8.0 8.0 11.1

INDOOR FAN Centrifugal Type

Quantity...Size (in.) Std 1...15 x 15 1...15 x 15 1...15 x 15

Typ e Drive Std Belt Belt Belt

Nominal Cfm 3000 3600 4000 Maximum Continuous Bhp Std 2.40 2.40 2.40

Motor Frame Size Std 56 56 56

Nominal Rpm Std ———

Fan Rpm Range Std 590- 840 685- 935 685- 935

Motor Bearing Type Ball Ball Ball Maximum Allowable Rpm 2100 2100 2100 Motor Pulley Pitch Diameter Min/Max (in.) Std 2.4/3.4 2.8/3.8 2.8/3.8

Nominal Motor Shaft Diameter (in.) Std

Fan Pulley Pitch Diameter (in.) Std 7.0 7.0 7.0

Belt, Quantity...Type...Length (in.) Std 1...A...53 1...A...48 1...A...49

Pulley Center Line Distance (in.) Std 16.75-19.25 16.75-19.25 15.85-17.50

Speed Change per Full Turn of

Moveable Pulley Flange (rpm)

Moveable Pulley Maximum Full Turns

From Closed Position

Factory Setting Std 555

Factory Speed Setting (rpm) Std 590 685 685

Fan Shaft Diameter at Pulley (in.) 111

HIGH-PRESSURE SWITCH (psig)

Standard Compressor Internal Relief (Differential) 450 ± 50 Cutout 428 Reset (Auto.) 320

LOSS-OF-CHARGE (LOW-PRESSURE) SWITCH (psig)

Cutout 7±3 Reset (Auto.) 22 ± 5

FREEZE PROTECTION THERMOSTAT (F)

Opens 30 ± 5 Closes 45 ± 5

Alt 1...15 x 15 — 1...15 x 15 High-Static 1...15 x 15 1...15 x 15 1...15 x 15

Alt Belt — Belt High-Static Belt Belt Belt

Alt 2.40 — 2.90 High-Static 3.70 3.70 5.25

Alt 56 — 56 High-Static 56 56 56

Alt ——— High-Static 1725 1725 1725

Alt 685- 935 — 835-1085 High-Static 860-1080 860-1080 830-1130

Alt 2.8/3.8 — 3.4/4.4 High-Static 4.0/5.0 4.0/5.0 2.8/3.8

Alt High-Static

Alt 7.0 — 7.0 High-Static 8.0 8.0 5.8

Alt 1...A...49 — 1...A...51 High-Static 1...A...65 1...A...53 1...BX...48

Alt 16.75-19.25 — 15.85-17.50 High-Static 16.75-19.25 16.75-19.25 15.85-17.50 Std 50 50 50 Alt 50 — 50 High-Static 60 60 60 Std 555 Alt 5—5 High-Static 556

Alt 5—5 High-Static 555

Alt 685 — 835 High-Static 860 880 887

OUTDOOR-AIR INLET SCREENS Cleanable.

RETURN-AIR FILTERS Throwaway

Quantity...Size (in.) 4...16 x 20 x 2 4...16 x 20 x 2 4...20 x 20 x 2

LEGEND

Bhp — Brake Horsepower

/4...1100

8 8 8

81/

/4...1100

—

Screen quantity and size vary based on options selected.

*Weightof14-in.roofcurb.

/4...1100

8 8 8

Fig. 6 — Base Unit Dimensions

Step 5 — Make Electrical Connections

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 transformer and connecting it to the 208-v1/4-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.

/4-in. male spade terminal on the

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.

208/230-3-60

460-3-60

LEGEND

C—Contactor COMP — Compressor IFC — Indoor-Fan Contactor NEC — National Electrical Code TB — Terminal Block

Field Wiring Factory Wiring Splice Connection (Factory-Supplied)

Fig. 7 — Power Wiring Connections

575-3-60

Table 2 — Electric Heating Capacities

50TFQ

UNIT SIZE

008, 009

012

*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)

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) kW new = 12.8 kW (rating at 215 v)

UNIT VOLTAGE

(60 Hz)

208/230/240

(3 phase)

460/480

(3 phase)

575

(3 phase)

208/230/240

(3 phase)

460/480

(3 phase)

575

(3 phase)

ACCESSORY

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*

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

SINGLE POINT BOX

PAC KA GE N O.

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

Table 3A — Electrical Data (Units Without Electrical Convenience Outlet)

VOLTAGE

50TFQ

UNIT SIZE

008

/2Ton s)

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

NOMINAL

V-P H-Hz

208/230-3-60

460-3-60

575-3-60

IFM

TYPE

STD 187 254 13.4 91.0 1.4 5.8

HIGH-STATIC 187 254 13.4 91.0 1.4 10.6

STD 414 508 6.7 42.0 0.7 2.6

HIGH-STATIC 414 508 6.7 42.0 0.7 4.8

STD

HIGH-STATIC 4.8

RANGE

Min Max RLA LRA

518 632 5.4 39.0 0.7

COMPRESSOR

(each)

OFM

FLA

ELECTRIC HEAT* POWER SUPPLY

IFM

FLA

Nominal

kW**

— — 38.8/ 38.8 40/ 40†† 41/ 41 229/229

7.8/10.4 21.7/ 25.0 65.9/ 70.0 70/ 70 66/ 69 251/254

12.0/16.0 33.3/ 38.5 80.4/ 86.9 90/ 90 79/ 85 262/268***

18.6/24.8 51.6/ 59.7 103.3/113.4 110/125 100/109 281/289***

24.0/32.0 66.6/ 77.0 122.0/135.0 125/150 117/129 296/306***

31.8/42.4 88.3/102.0 149.1/166.3 150/175 142/158 317/331*** — — 43.6/ 43.6 45/ 45†† 46/ 46 273/273

7.8/10.4 21.7/ 25.0 70.7/ 74.8 80/ 80 71/ 75 294/298

12.0/16.0 33.3/ 38.5 85.2/ 91.7 90/100 85/ 91 306/311***

18.6/24.8 51.6/ 59.7 108.1/118.2 110/125 106/115 324/332***

24.0/32.0 66.6/ 77.0 126.8/139.8 150/150 123/135 339/350***

31.8/42.4 88.3/102.0 153.9/171.1 175/175 148/164 361/375*** — — 19.1 20†† 20 108

13.9 16.7 40.0 40†† 39 124

16.5 19.8 43.8 45†† 43 128

27.8 33.4 60.8 70 58 141

33.0 39.7 68.7 70 66 147

41.7 50.2 81.8 90 78 158 — — 21.3 25†† 23 130

13.9 16.7 42.2 45†† 42 146

16.5 19.8 46.0 50†† 45 149

27.8 33.4 63.0 70 61 163

33.0 39.7 70.9 80 68 169

41.7 50.2 84.0 90 80 180*** — — 15.4 20†† 16 97

2.6

17.0 17.1 36.7 40†† 36 114

34.0 34.1 58.0 60†† 55 131 — — 17.1 20†† 18 114

17.0 17.1 38.5 40†† 38 132

34.0 34.1 59.7 60†† 57 149

FLA MCA MOCP FLA LRA

DISCONNECT

SIZE†

Table 3A — Electrical Data (Units Without Electrical Convenience Outlet) (cont)

VO LTAGE

50TFQ

UNIT SIZE

009

(81/2Ton s)

012

(10 Tons)

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

NOMINAL

V-P H- Hz

208/230-3-60

460-3-60

575-3-60

208/230-3-60

460-3-60

575-3-60

IFM

TYPE

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

STD

HIGH-STATIC 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

RANGE

Min Max RLA LRA

518 632 6.4 58.0 0.7

COMPRESSOR

(each)

OFM

FLA

ELECTRIC HEAT* POWER SUPPLY

IFM

FLA

Nominal

kW**

— — 44.6/ 44.6 45/ 45†† 47/ 47 321/321

7.8/10.4 21.7/ 25.0 71.7/ 75.9 80/ 80 72/ 75 343/346

12.0/16.0 33.3/ 38.5 86.2/ 92.7 90/100 85/ 91 354/360***

18.6/24.8 51.6/ 59.7 109.1/119.2 110/125 106/115 373/381***

24.0/32.0 66.6/ 77.0 127.9/140.9 150/150 123/135 388/398***

31.8/42.4 88.3/102.0 155.0/172.1 175/175 148/164 409/428*** — — 49.4/ 49.4 50/ 50†† 52/ 52 365/365

7.8/10.4 21.7/ 25.0 76.5/ 80.7 80/ 90 77/ 81 386/390***

12.0/16.0 33.3/ 38.5 91.0/ 97.5 100/100 91/ 96 398/403***

18.6/24.8 51.6/ 59.7 113.9/124.0 125/125 112/121 416/424***

24.0/32.0 66.6/ 77.0 132.7/145.7 150/150 129/141 431/442***

31.8/42.4 88.3/102.0 159.8/176.9 175/200 154/170 453/467*** — — 22.7 25†† 24 162

13.9 16.7 43.6 45†† 43 178

16.5 19.8 47.4 50†† 46 182

27.8 33.4 64.4 70 62 195

33.0 39.7 72.3 80 69 201

41.7 50.2 85.4 90 81 212*** — — 24.9 25†† 26 184

13.9 16.7 45.8 50†† 45 200

16.5 19.8 49.6 50†† 49 203

27.8 33.4 66.6 70 65 217

33.0 39.7 74.5 80 72 223

41.7 50.2 87.6 90 84 234*** — — 17.6 20†† 18 135

2.6

17.0 17.1 39.0 40†† 38 152

34.0 34.1 60.2 70†† 58 169 — — 19.4 20†† 20 152

17.0 17.1 40.7 45†† 40 170

34.0 34.1 62.0 70 60 187 — — 47.3/ 47.3 50/ 50†† 49/ 49 295/295

7.8/10.4 21.7/ 25.0 74.4/ 78.6 80/ 80 74/ 78 317/320

12.0/16.0 33.3/ 38.5 88.9/ 95.4 90/100 88/ 94 328/334***

24.0/32.0 66.6/ 77.0 130.6/143.6 150/150 126/138 362/372***

31.8/42.4 88.3/102.0 157.7/174.8 175/175 151/167 383/397***

37.6/50.0 104.4/120.3 177.8/167.6 200/175 170/188 399/415*** — — 49.0/ 49.0 50/ 50†† 51/ 51 314/314

7.8/10.4 21.7/ 25.0 76.1/ 80.8 80/ 90 76/ 80 336/389***

12.0/16.0 33.3/ 38.5 90.6/ 97.1 100/100 90/ 96 347/353***

24.0/32.0 66.6/ 77.0 132.3/145.3 150/150 128/140 381/391***

31.8/42.4 88.3/102.0 159.4/176.5 175/200 153/169 402/416***

37.6/50.0 104.4/120.3 179.5/169.3 200/200 171/190 418/434*** — — 56.5/ 56.5 60/ 60†† 60/ 60 362/362

7.8/10.4 21.7/ 25.0 83.6/ 87.8 90/ 90 85/ 89 384/387***

12.0/16.0 33.3/ 38.5 98.1/104.6 100/110 98/104 395/401***

24.0/32.0 66.6/ 77.0 139.8/152.8 150/175 137/149 429/439***

31.8/42.4 88.3/102.0 166.9/184.0 175/200 162/177 450/464***

37.6/50.0 104.4/120.3 187.0/176.8 200/200 180/198 466/482*** — — 23.4 25†† 24 143

16.5 19.8 48.1 50†† 47 163

27.8 33.4 65.1 70 63 176

33.0 39.7 73.0 80 70 183

41.7 50.2 86.1 90 82 193***

50.0 60.1 83.5 90 93 203*** — — 24.2 25†† 25 182

16.5 19.8 48.9 50†† 48 202

27.8 33.4 65.9 70 64 216

33.0 39.7 73.8 80 71 222

41.7 50.2 86.9 90 83 233***

50.0 60.1 84.3 90 94 243*** — — 28.2 30†† 30 176

16.5 19.8 52.9 60†† 53 196

27.8 33.4 69.9 70 68 210

33.0 39.7 77.8 80 76 216

41.7 50.2 90.9 100 88 227***

50.0 60.1 88.3 100 99 237*** — — 18.7 20†† 20 118

17.0 17.1 40.1 45†† 39 135

34.0 34.1 61.4 70 59 152

51.0 51.2 69.9 70 78 169 — — 19.4 20†† 20 149

17.0 17.1 40.7 45†† 40 166

34.0 34.1 62.0 70 60 183

51.0 51.2 70.6 80 79 201*** — — 22.6 25†† 24 145

17.0 17.1 43.9 45†† 44 162

34.0 34.1 65.2 70 63 179

51.0 51.2 73.8 80 83 196***

FLA MCA MOCP FLA LRA

DISCONNECT

SIZE†

Table 3B — Electrical Data (Units With Electrical Convenience Outlet)

VOLTAGE

50TFQ

UNIT SIZE

008

/2Ton s)

009

/2Ton s)

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

NOMINAL

V-P H- Hz

208/230-3-60

460-3-60

575-3-60

208/230-3-60

460-3-60

575-3-60

IFM

TYPE

STD 187 254 13.4 91.0 1.4 5.8

HIGH-STATIC 187 254 13.4 91.0 1.4 10.6

STD 414 508 6.7 42.0 0.7 2.6

HIGH-STATIC 414 508 6.7 42.0 0.7 4.8

STD 518 632 5.4 39.0 0.7 2.6

HIGH-STATIC 518 632 5.4 39.0 0.7 4.8

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

STD 518 632 6.4 58.0 0.7 2.6

HIGH-STATIC 518 632 6.4 58.0 0.7 4.8

RANGE

Min Max RLA LRA

COMPRESSOR

(each)

OFM

FLA

ELECTRIC

IFM

FLA

HEAT*

Nominal

kW**

— — 43.6/ 43.6 45/ 45†† 46/ 46 234/234

7.8/10.4 21.7/ 25.0 70.7/ 74.8 80/ 80 71/ 75 256/259

12.0/16.0 33.3/ 38.5 85.2/ 91.7 90/100 85/ 91 267/272***

18.6/24.8 51.6/ 59.7 108.1/118.2 110/125 106/115 285/294***

24.0/32.0 66.6/ 77.0 126.8/139.8 150/150 123/135 300/311***

31.8/42.4 88.3/102.0 153.9/171.1 175/175 148/164 322/336*** — — 48.4/ 48.4 50/ 50†† 52/ 52 277/277

7.8/10.4 21.7/ 25.0 75.5/ 79.6 80/ 80 77/ 81 299/302***

12.0/16.0 33.3/ 38.5 90.0/ 96.5 90/100 90/ 96 311/316***

18.6/24.8 51.6/ 59.7 112.9/123.0 125/125 111/120 329/337***

24.0/32.0 66.6/ 77.0 131.6/144.6 150/150 128/140 344/354***

31.8/42.4 88.3/102.0 158.7/175.9 175/200 153/169 366/379*** — — 21.3 25†† 23 110

13.9 16.7 42.1 45†† 42 127

16.5 19.8 46.0 50†† 45 130

27.8 33.4 63.0 70 61 143

33.0 39.7 70.9 80 68 150

41.7 50.2 84.0 90 80 160*** — — 23.5 25†† 25 132

13.9 16.7 44.3 45†† 44 148

16.5 19.8 48.2 50†† 48 151

27.8 33.4 65.2 70 63 165

33.0 39.7 73.1 80 71 171

41.7 50.2 86.2 90 83 182*** — — 17.1 20†† 18 99

17.0 17.1 38.5 40†† 38 116

34.0 34.1 59.7 60†† 57 133 — — 18.9 20†† 20 116

17.0 17.1 40.2 45†† 40 133

34.0 34.1 61.5 70 59 150 — — 49.4/ 49.4 50/ 50†† 52/ 52 326/326

7.8/10.4 21.7/ 25.0 76.5/ 80.7 80/ 90 77/ 81 348/351

12.0/16.0 33.3/ 38.5 91.0/ 97.5 100/100 91/ 96 359/364

18.6/24.8 51.6/ 59.7 113.9/124.0 125/125 112/121 377/386

24.0/32.0 66.6/ 77.0 132.7/145.7 150/150 129/141 392/403

31.8/42.4 88.3/102.0 154.8/176.9 175/200 154/170 414/428 — — 54.2/ 54.2 60/ 60†† 58/ 58 369/369

7.8/10.4 21.7/ 25.0 81.3/ 85.5 90/ 90 83/ 86 391/394***

12.0/16.0 33.3/ 38.5 95.8/102.3 100/110 96/102 403/408***

18.6/24.8 51.6/ 59.7 118.7/128.8 125/150 117/126 421/429***

24.0/32.0 66.6/ 77.0 137.5/150.5 150/175 134/146 436/446***

31.8/42.4 88.3/102.0 164.6/181.7 175/200 159/175 458/471*** — — 24.9 25†† 26 164

13.9 16.7 45.7 50†† 45 181

16.5 19.8 49.6 50†† 49 184

27.8 33.4 66.6 70 65 197

33.0 39.7 74.5 80 72 204

41.7 50.2 87.6 90 84 214*** — — 27.1 30†† 29 186

13.9 16.7 47.9 50†† 48 202

16.5 19.8 51.8 60†† 51 205

27.8 33.4 68.8 70 67 219

33.0 39.7 76.7 80 74 225

41.7 50.2 89.8 90 86 236*** — — 19.3 20†† 20 137

17.0 17.1 40.7 45†† 40 154

34.0 34.1 62.0 70 60 171 — — 21.1 25†† 22 154

17.0 17.1 42.5 45†† 42 171

34.0 34.1 63.7 70 62 188

FLA MCA MOCP FLA LRA

POWER SUPPLY

DISCONNECT

SIZE†

50TFQ

UNIT SIZE

012

(10 Tons)

NOMINAL

V-P H-Hz

208/230-3-60

460-3-60

575-3-60

Table 3B — Electrical Data (Units With Electrical Convenience Outlet) (cont)

VO LTAGE

IFM

TYPE

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

RANGE

Min Max RLA LRA

COMPRESSOR

(each)

OFM

FLA

ELECTRIC

IFM

FLA

HEAT*

Nominal

kW**

— — 52.1/ 52.1 60/ 60†† 55/ 55 300/300

7.8/10.4 21.7/ 25.0 79.2/ 83.4 80/ 90 80/ 84 322/325***

12.0/16.0 33.3/ 38.5 93.7/100.2 100/110 93/ 99 333/338***

24.0/32.0 66.6/ 77.0 135.4/148.4 150/150 132/144 366/377***

31.8/42.4 88.3/102.0 162.5/179.6 175/200 157/172 388/402***

37.6/50.0 104.4/120.3 182.6/172.4 200/200 175/193 404/420*** — — 53.8/ 53.8 60/ 60†† 57/ 57 319/319

7.8/10.4 21.7/ 25.0 80.9/ 85.1 90/ 90 82/ 86 341/344***

12.0/16.0 33.3/ 38.5 95.4/101.9 100/110 95/101 352/357***

24.0/32.0 66.6/ 77.0 137.1/150.1 150/175 134/145 385/396***

31.8/42.4 88.3/102.0 164.2/181.3 175/200 158/174 407/421***

37.6/50.0 104.4/120.3 184.3/174.1 200/200 177/195 423/439*** — — 61.3/ 61.3 70/ 70 66/ 66 367/367

7.8/10.4 21.7/ 25.0 88.4/ 92.6 90/100 91/ 94 389/392***

12.0/16.0 33.3/ 38.5 102.9/109.4 110/110 104/110 400/405***

24.0/32.0 66.6/ 77.0 144.6/157.6 150/175 142/154 433/444***

31.8/42.4 88.3/102.0 171.7/188.8 175/200 167/183 455/459***

37.6/50.0 104.4/120.3 191.8/181.6 200/200 186/204 471/487*** — — 25.5 30†† 27 145

16.5 19.8 50.3 60†† 50 165

27.8 33.4 67.3 70 65 178

33.0 39.7 75.2 80 73 185

41.7 50.2 88.3 90 85 195***

50.0 60.1 85.6 90 96 205*** — — 26.3 30†† 28 185

16.5 19.8 51.1 60†† 51 204

27.8 33.4 68.1 70 66 218

33.0 39.7 76.0 80 73 224

41.7 50.2 89.1 90 86 235***

50.0 60.1 86.4 90 97 245*** — — 30.3 35†† 32 179

16.5 19.8 55.1 60†† 55 198

27.8 33.4 72.1 80 71 212

33.0 39.7 80.0 80 78 218

41.7 50.2 93.1 100 90 229***

50.0 60.1 90.4 100 102 239*** — — 20.5 25†† 22 120

17.0 17.1 41.8 45†† 41 137

34.0 34.1 63.1 70 61 154

51.0 51.2 71.7 80 80 171*** — — 21.1 25†† 22 151

17.0 17.1 42.5 45†† 42 168

34.0 34.1 63.7 70 62 185

51.0 51.2 72.3 80 81 202*** — — 24.3 25†† 26 146

17.0 17.1 45.7 50†† 46 163

34.0 34.1 66.9 70 65 180

51.0 51.2 75.5 80 85 198***

FLA MCA MOCP FLA LRA

POWER SUPPLY

DISCONNECT

SIZE†

FLA — Full Load Amps HACR — Heating, Air Conditioning and Refrigeration IFM — Indoor Fan Motor LRA — Locked Rotor Amps MCA — Minimum Circuit Amps MOCP — Maximum Overcurrent Protection NEC — National Electrical Code OFM — Outdoor Fan Motor RLA — Rated Load Amps

*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 swi tch is unavailable.

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.

LEGEND

%Voltage Imbalance

= 100 x

Example: Supply voltage is 460-3-60.

Determine maximum deviation from average voltage.

(AB)457–452=5v (BC) 464 – 457 = 7 v (AC) 457 – 455 = 2 v

Maximum devia tion is 7 v.

Determine percent of voltage imbalance.

%Voltage Imbalance = 100 x

This amount of phase imbalance is satisfactory as it is below the maximum allowable 2%.

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

max voltage deviation from average voltage

AB = 452 v BC = 464 v AC = 455 v

Average Voltage =

=1.53%

average voltage

457

452 + 464 + 455

1371

= 457

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.

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.

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

24 VAC

RMTOCC

CMPSAFE

FSD

SFS

NOT USED

Fig. 8B — Low Voltage Connections

(Units with PremierLink™ Controls)

THERMOSTAT CONTROL

CONNECTION

BOARD

COOL STAGE 1

FAN

HEAT STAGE 1

COOL STAGE 2

HEAT STAGE 2

24 VAC HOT

24 VAC COM

N/A

OUTDOOR AIR

SENSOR

THERMOSTAT DIPSWITCH SETTINGS ON

OFF

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

Field Wiring

Y1/W2

W/W1

Y/Y2

O/W2

LEGEND

IPD/X

WIRE CONNECTIONS TO LOW-VOLTAGE SECTION (CONNECTION BOARD)

Fig. 8A — Low-Voltage Connections With or

Without Economizer or Two-Position Damper

DISCONNECT BOARD

DISCONNECT SWITCH (OPTIONAL)

RACEWAY

COMPRESSOR NO. 2

CONVENIENCE OUTLET

HOLE IN END PANEL

COMPRESSOR NO. 1

Fig. 9 — Typical Field Control Wiring Raceway

Table 4 — Heat Anticipator Settings

UNIT

50TFQ

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

Heater

kW*

10.4, 16.0 0.3 NA NA

24.8, 32.0 0.6 0.3 0.3

42.4, 50.0 0.9 0.6 0.3 41.7, 50.0 0.6 0.3 0.3 51.0 0.6 0.3 0.3

208/230 460 575

1-Stage

Configuration

2-Stage

Stage 1 Stage 2 Stage 1 Stage 2 Stage 1 Stage 2

Heater

kW*

13.9, 16.5

27.8, 33.0

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.

UNIT VOLTAGE

Configuration

1-Stage

0.3 NA NA 17.0, 34.0 0.3 NA NA

2-Stage

Heater

kW*

1-Stage

Configuration

2-Stage

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

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

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 (CO

) 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

/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 (CO optional indoor air quality (CO

)Sensor — Mount the

) sensor according to manufac-

turer specifications.

A separate field-supplied transformer must be used to pow-

er the CO

Wire the CO

sensor.

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. 14 — Outdoor Air Damper Position Setting

Table 5 — PremierLink™ Sensor Usage

APPLICATION

Dry Bulb

Temperature with

PremierLink™*

(PremierLink

requires4-20mA

Actuator)

Differential Dry Bulb

Temperature with

PremierLink* (PremierLink

requires4-20mA

Actuator)

Single Enthalpy with

PremierLink* (PremierLink

requires4-20mA

Actuator)

Differential Enthalpy

with PremierLink*

(PremierLink

requires4-20mA

Actuator)

*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. CO

Sensors (Optional):

33ZCSENCO2 — Room sensor (adjustable). Aspirator box is required for duct mounting of the sensor. 33ZCASPCO2 — Aspirator box used for duct-mounted CO 33ZCT55CO2 — Space temperature and CO2room sensor with override. 33ZCT56CO2 — Space temperature and CO

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.

OUTDOOR AIR

TEMPERATURE SENSOR

Included —

HH79NZ017

Included —

HH79NZ017

Included —

Not Used

Included —

Not Used

room sensor with override and set point.

RETURN AIR

TEMPERATURE SENSOR

———

Required —

33ZCT55SPT

or Equivalent

—

room sensor.

OUTDOOR AIR

ENTHALPY SENSOR

RETURN AIR

ENTHALPY SENSOR

——

Required —

HH57AC077

Required —

HH57AC077

—

Required —

HH57AC078

Fig. 15A — PremierLink Controller

PREMIERLINK CONTROL

HINGED DOOR PANEL

PREMIERLINK COVER

Fig. 15B — PremierLink™ Controller (Installed)

OAT

PNK

VIO

YEL

BLU

BLK

RED

BLU

YEL

WHT

OUTDOOR AIR

ENTHALPY SENSOR

Economi$er2

4 - 20mA

RED

BRN

PNK

VIO

Power Exhaust/Energy Recycler

GRA

ORN

PNK

TR1

RED

SAT

Space Temp./ Set

Point Adjustment

Quality Sensor

GRAY

BLK

RETURN AIR

ENTHALPY

SENSOR

BLK

RED

Indoor Air

Outdoor Air

CMPSAFE

TB-2

BLU

BRN

BLK

BRN

RED

BRN

BLU

ORN

TB-3

RMTOCC

GRN

Com

SFS

FSD

CCN

BLU

WHT

PNK

RED

WHT

COMMS — Communications OAT — Outdoor Air Temperature Sensor PWR — Power SAT — Supply Air Temperature Sensor

YEL

BLK

VIO

BRN

ORN

RED

BLU

GRA

LEGEND

BLK

PNK

BRN

GRN

YEL

BLU

WHT

PNK

BLU

GRA

PNK

BLK

ANAL OG

0-20mAIN

DISCRETE

PWR

BRN

Fig. 16 — Typical PremierLink Controls Wiring

COMMS

RED

BRN

0-20 mA

TB-1

RTU Terminal

Board

HK50AA0

PremierLink

PP/MP

WHT

GRA

RED

GRA

ORN

PNK

WHT

Relays

PNK

ORNORN

ORN

RED

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 Premier-

Link controller and to terminal (3) on enthalpy sensor.

d. Connect the GRAY/RED wire to J4-1 on Premier-

Link 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 follow-

ing (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

TR TR1

LED

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.

RED BRN

BLK

RED

GRAY/ORN

GRAY/RED

WIRE HARNESS IN UNIT

(OUTDOOR

AIR

ENTHALPY

SENSOR)

(RETURN AIR

ENTHALPY

SENSOR)

Fig. 17 — Outdoor and Return Air Sensor Wiring

Connections for Differential Enthalpy Control

HH57AC077 ENTHALPY CONTROL AND

BRACKET

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

MOUNTING PLATE

OUTDOOR AIR ENTHALPY SENSOR

C7400A1004

Fig. 18 — Differential Enthalpy Control,

Sensor and Mounting Plate (33AMKITENT006)

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