Carrier 50TJ016-028 User Manual

Single-Package Rooftop Units

Electric Cooling with Electric Heat Option

Installation, Start-Up and

Service Instructions

50TJ016-028

CONTENTS

Page

SAFETY CONSIDERATIONS INSTALLATION Step 1 — Provide Unit Support

• ROOF CURB

• ALTERNATE UNIT SUPPORT

Step 2 — Rig and Place Unit

• POSITIONING

• ROOF MOUNT

Step 3 — Field Fabricate Ductwork Step 4 — Make Unit Duct Connections Step 5 — Trap Condensate Drain Step 6 — Make Electrical Connections

• FIELD POWER SUPPLY

• FIELD CONTROL WIRING

• OPTIONAL NON-FUSED DISCONNECT

• OPTIONAL CONVENIENCE OUTLET

Step 7 — Make Outdoor-Air Inlet

Adjustments

• MANUAL OUTDOOR-AIR DAMPER

• OPTIONAL ECONOMI$ER

Step 8 — Install Outdoor-Air Hood Step 9 — Install All Accessories

• MOTORMASTER® I CONTROL INSTALLATION

• MOTORMASTER III CONTROL INSTALLATION

Step 10 — Install Humidistat for Optional

MoistureMiser Dehumidification Package START-UP SERVICE TROUBLESHOOTING START-UP CHECKLIST

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-18

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-24

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24-31

. . . . . . . . . . . . . . . . . . . . . . . . .1

. . . . . . . . . . . . . . . . . . . . . .1

. . . . . . . . . . . . . . . . . . . . . . . . .1

. . . . . . . . . . . . . . . . . .7

. . . . . . . . . . . . . . .7

. . . . . . . . . . . . . . . . . . . .7

. . . . . . . . . . . . . .8

. . . . . . . . . . . . . . . . . .12

. . . . . . . . . . . . . . . . . . . .15

. . . . . . . . .16

. . . . . . . . . . . . . . . . . . . . . . . . . . . . 32,33

. . . . . . . . . . . . . . . . . . . . . . . . . . CL-1

SAFETY CONSIDERATIONS

Installation and servicing 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 li terature, ta gs and label s attached t o the uni t, 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 extinguishers available for all brazing operations.

Before performing service or maintenance operations on unit, turn off main power switch to unit. Electrical shock could cause personal injury.

IMPORTANT: Units have high ambient operating limits. If limits are exceeded, the unit will automatically lock the compressor out of operation. Manual r eset will be required to restart the compressor.

INSTALLATION

Step 1 — Provide Unit Support

ROOF CURB — Assemble and install accessory roof curb or horizontal adapter roof curb in accordance with instructions shipped with the curb or horizontal adapter. Accessory roof curb and horizontal adapter roof curb and information required to field fabricate a roof curb or horizontal adapter roof curb are shown in Fig. 1 and 2. Install insulation, cant strips, roofing, and counter flashing as shown. Ductwork can be secured to roof curb before unit is set in place.

IMPORTANT: The gasketing of the unit to the roof curb or adapter roof curb is critical for a leak-proof seal. Install gasket supplied with the roof curb or adapter roof curb as shown in Fig. 1. Improperly applied gasket can result in air leaks and poor unit performance.

Curb or adapter roof curb should be level. This is necessary to permit unit drain to function properly. Unit leveling tolerance is ± ry Roof Curb or Horizontal Adapter Roof Curb Installation Instructions for additional information as required.

ALTERNATE UNIT SUPPORT — When the curb or adapter cannot be used, support unit with sleepers using unit curb or adapter support area. If sleepers cannot be used, support long sides of unit with a minimum of 3 equally spaced 4-in. x 4-in. pads on each side.

Step 2 — Rig and Place Unit —

transportation damage. File any claim with transportation agency. Keep unit upright, and do not drop. Use spreader bars over unit to prevent sling or cable damage. Rollers may be used to move unit across a roof. Level by using unit frame as a reference; leveling tolerance is ± tion. See Fig. 3 for additional information. Unit weight is shown in T able 1.

shown in Fig. 3. Refer to rigging instructions on unit. POS ITIONI NG — Provide clearance around and above unit

for airflow, safety, and service access (Fig. 4 and 5).

lets near exhaust vents or other sources of contaminated air.

higher level runoff and overhangs. ROOF MOUNT — Check building codes for weight distribu-

tion requirements.

/16 in. per linear ft in any direction. Refer to Accesso-

Inspect unit for

/16 in. per linear ft in any direc-

Four lifting holes are provided in ends of unit base rails as

Do not install unit in an indoor location. Do not locate air in-

Although unit is weatherproof, guard against water from

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.

Book 1 Ta b 1 b

PC 111 Catalog No. 535-034 Printed in U.S.A. Form 50TJ-17SI Pg 1 2-01 Replaces: 50TJ-14SI

lb density.

.28 .45 .28 .43

thick neoprene coated 1

″

Deg.in.Deg.in.

DIMENSIONS* (degrees and inches)

ALL

UNIT

below the unit discharge for units equipped with electric

heaters.

A 90 degree elbow must be installed on the supply ductwork

NOTE: To prevent the hazard of stagnant water build-up in the drain

NOTES:

1. Roof curb accessory is shipped disassembled.

2. Insulated panels: 1

3. Dimensions in ( ) are in millimeters.

4. Direction of airflow.

5. Roof curb: 16 ga. (VA03-56) stl.

pan of the indoor section, unit can only be pitched as shown.

PKG. NO. REF. CURB HEIGHT DESCRIPTION

High

″

(305) Standard Curb 14

″

-2

′

CRRFCURB010A00 1

Fig. 1 — Roof Curb Details

(610) Side Supply and Return Curb for High Installation

(610) Standard Curb for Units Requiring High Installation

″

-0

′

CRRFCURB012A00 2

CRRFCURB011A00 2

NOTE: For preassembled horizontal adapter roof curb part no.

NOTES:

1. Dimensions in ( ) are in millimeters.

2. Refer to Fig. 4 and 5 for unit operating weights.

3. Remove boards at ends of unit and runners prior to rigging.

4. Rig by inserting hooks into unit base rails as shown. Use corner post from packaging to protect coil from damage. Use bumper boards for spreader bars.

5. Weights do not include optional EconoMi$er. See Fig. 4 and 5 for EconoMi$er weight. See Table 1 for MoistureMiser weight.

6. Weights given are for aluminum evaporator and condenser coil plate fins.

Fig. 3 — Rigging Details

UNIT 50TJ

MAXIMUM

SHIPPING WEIGHT

DIMENSIONS

Lb Kg Ft-in. mm Ft-in. mm

016

1550 703 6-11

/22121 4- 0 1219

020

1650 748 6-11

/22121 3-10 1168

024

1700 771 6-11

/22121 3- 7 1092

028

1850 839 6-11

/22121 3- 5 1041

All panels must be in place when rigging.

CRRFCURB013A00, the accessory kit includes a factory-designed, high-static, transition duct. For horizontal curb part no. CRRFCURB012A00, a field-supplied transition duct is required.

Fig. 2 — Horizontal Adapter Roof Curb

and Roof Curb

(8) on

″

′

DIM A DIM B DIM C

(D)

CORNER

(C)

CORNER

(B)

CORNER

(A)

CORNER

WEIGHT

ECONOMI$ER

WEIGHT

STD UNIT

Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Ft-in. mm Ft-in. mm Ft-in. mm

(1219) for proper operation of damper and

(1219) if conditions permit coil removal from the

″

(1219) for proper condenser coil airflow.

-0

′

″

-0

′

(2134) for coil removal. This dimension can be

(1219) for control box access.

-0

′

″

-0

′

reduced to 4

Rear: 7

1. Refer to print for roof curb accessory dimensions.

2. Dimensions in [ ] are in millimeters.

3. Center of gravity.

NOTES:

1550 703 80 36.3 391 177 365 166 384 174 410 186 3-5 1041 3-6 1067 1-10 559

1650 748 80 36.3 399 181 384 174 402 182 439 199 3-4 1016 3-6 1067 1- 8 508

•

4. Direction of airflow.

5. Ductwork to be attached to accessory roof curb only.

6. Minimum clearance:

(1829) to assure proper condenser fan operation.

″

-0

′

-0

′

top.

power exhaust if so equipped.

Left side: 4

Front: 4

Right side: 4

Top: 6

Local codees or jurisdiction may prevail.

•

each side for top cover drip edge.

damper/power exhaust as stated in Note #6, a removable fence or

barricade requires no clearance.

9. See drawing 50TJ500352 for service option details.

7. With the exception of clearance for the condenser coil and the

8. Dimensions are from outside of corner post. Allow 0

POWER EXHAUST/BAROMETRIC RELIEF

(ACCESSORY ONLY)

UNIT

50TJ016

50TJ020

Fig. 4 — Base Unit Dimensions, 50TJ016,020

DIM ADIM BDIM C

(D)

CORNER

(C)

CORNER

(B)

CORNER

(A)

CORNER

(8) on

″

′

(1219) for proper operation of damper and

(1219) if conditions permit coil removal from the

″

(1219) for proper condenser coil airflow.

-0

′

″

-0

′

(2134) for coil removal. This dimension can be

(1219) for control box access.

-0

′

″

Left side: 4

•

-0

′

Front: 4

•

(1829) to assure proper condenser fan operation.

″

-0

′

power exhaust if so equipped.

Right side: 4

Top : 6

Local codees or jurisdiction may prevail.

•

damper/power exhaust as stated in Note #6, a removable fence or

barricade requires no clearance.

each side for top cover drip edge.

7. With the exception of clearance for the condenser coil and the

8. Dimensions are from outside of corner post. Allow 0

9. See drawing 50TJ500352 for service option details.

POWER EXHAUST/BAROMETRIC RELIEF

(ACCESSORY ONLY)

-0

′

reduced to 4

top.

Rear: 7

1. Refer to print for roof curb accessory dimensions.

2. Dimensions in [ ] are in millimeters.

3. Center of gravity.

NOTES:

•

4. Direction of airflow.

5. Ductwork to be attached to accessory roof curb only.

6. Minimum clearance:

WEIGHT

ECONOMI $ER

WEIGHT

STD UNIT

UNIT

Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Ft-in. mm Ft- in. mm Ft-in. mm

1700 771 80 36.3 419 190 394 179 425 193 463 210 3-4 1016 3-5 1041 1-8 508

50TJ024

1850 839 80 36.3 428 194 412 187 511 232 499 226 3-2 965 3-7 1092 1-8 508

50TJ028

Fig. 5 — Base Unit Dimensions, 50TJ024,028

Table 1 — Physical Data

UNIT 50TJ

208/230, 460 v 575 v NOMINAL CAPACITY (tons) 15 18 20 25 OPERATING WEIGHT 1550 1650 1700 1850

EconoMi$er 80 MoistureMiser Dehumidification

Package

COMPRESSOR/MANUFACTURER Scroll, Copeland

Quantity...Model (Ckt 1, Ckt 2) Capacity Stages (%) 55, 45 55, 45 60, 40

Number of Refrigerant Circuits 22 2 Oil (oz) (Ckt 1, Ckt 2) 106, 81 106,106 136, 106

REFRIGERANT TYPE R-22

Expansion Device TXV Operating Charge (lb-oz) Circuit 1* 10-10 Circuit 2 12-3 13-6 13- 0

CONDENSER COIL Cross-Hatched

Rows...Fins/in. 2...17 Total Face Area (sq ft) 21.7 21.7 21.7

CONDENSER FAN Propeller Type

Nominal Cfm 10,500 10,500 14,200 14,200 Quantity...Diameter (in.) 3...22 3...22 2...30 2...30 Motor Hp...Rpm Watts Input (Total) 1100 1100 3400 3400

EVAPORATOR COIL Cross-Hatched

Rows...Fins/in. 2...17 3...15 3...15 4...15 Total Face Area (sq ft) 17.5 17.5 17.5 17.5

EVAPORATOR FAN Centrifugal Type

Quantity...Size (in.) 2...10 x 10 2...10 x 10 2...12 x 12 2...12 x 12 2...12 x 12 Type Drive Belt Belt Belt Belt Belt Nominal Cfm 6000 6000 7200 8000 10,000 Motor Hp 3.7 3.0 5 7.5 10 Motor Nominal Rpm 1725 1725 1745 1745 1740

Maximum Continuous Bhp 4.25 3.45 5.90 Motor Frame Size 56H 56H 184T 213T 215T

Nominal Rpm High/Low ——— — — Fan r/s Range Low-Medium Static 891-1179 1159-1429 910-1095 1002-1225 1066-1283

Motor Bearing Type Ball Ball Ball Ball Ball Maximum Allowable Rpm 1550 1550 1550 1550 1550 Motor Pulley Pitch Diameter Low-Medium Static 3.1/4.1 4.3/5.3 4.9/5.9 5.4/6.6 4.9/5.9

Min/Max (in.) High Static 3.7/4.7 — 4.9/5.9 5.4/6.6 4.9/5.9 Nominal Motor Shaft Diameter (in.) Fan Pulley Pitch Diameter (in.) Low-Medium Static 6.0 6.4 9.4 9.4 8.0

Nominal Fan Shaft Diameter (in.) 1 Belt, Quantity...Type...Length (in.) Low-Medium Static 1...BX...42 1...BX...45 1...BX...50 1...BX...53 2...BX...50

Pulley Center Line Distance (in.) 13.5-15.5 13.5-15.5 13.3-14.8 14.6-15.4 14.6-15.4 Speed Change per Full Turn of

Movable Pulley Flange (rpm) Movable Pulley Maximum Full Turns

From Closed Position 666 6 6 Factory Speed 3.5 3.5 3.5 3.5 3.5 Factory Speed Setting (rpm Low-Medium Static 1035 1296 1002 1120 1182

Fan Shaft Diameter at Pulley (in.) 1

HIGH-PRESSURE SWITCH (psig)

Cutout 426 Reset (Auto) 320

LOW-PRESSURE SWITCH (psig)

Cutout 27 Reset (Auto) 44

FREEZE PROTECTION THERMOSTAT (F)

Opens 30 ± 5 Closes 45 ± 5

OUTDOOR-AIR INLET SCREENS Cleanable

Quantity...Size (in.) 2...20 x 25 x 1

RETURN-AIR FILTERS Throwaway†

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

High Static 1227-1550 — 1069-1287 1193-1458 1332-1550

High Static 5.2 — 8.0 7.9 6.4

High Static 1...BX...42 — 1...BX...48 1...BX...50 2...BX...47

Low-Medium Static 48 44 37 37 36 High Static 55 — 34 44 45

High Static 1389 — 1178 1328 1470

POWER EXHAUST

LEGEND

Bhp — Brake Horsepower TXV — Thermostatic Expansion Valve

*Circuit 1 uses the lower por tion of condenser coil and lower portion of evap-

orator coils; and Circuit 2 uses the upper portion of both coils.

016

020 024 028

80 80 80

2...ZR94KC 50, 50

81, 81

10-10

Aluminum Pre-Coated, or Copper Plate Fins

21.7

/2...1050

/2 Hp, 208/230-460 v Motor Direct Drive, Propeller-Fan (Factory-Wired for 460 v)

13/

†The 50TJ028 units requires 2-in. industrial-grade filters capable of handling

face velocities of up to 625 ft/min (such as American Air Filter no. 5700 or equivalent).

NOTE: The 50TJ016-028 units have a low-pressure switch (standard) located on the suction side.

40 40 40

1...ZR108KC,

1...ZR94KC

15-5 16-0 20-13

/8-in. Copper Tubes, Aluminum Lanced,

3...15 3...15 4...15

/2...1050 1...1075 1...1075

/8-in. Copper Tubes, Aluminum Lanced or

Copper Plate Fins, Face Split

11/

17/

1...20 x 20 x 1

4...16 x 20 x 2

1...ZR125KC,

1...ZR108KC

8.7 [208/230, 575 v]

9.5 [460 v]

13/

17/

1...ZR16M3,

1...ZR125KC

10.2 [208/230, 575 v]

11.8 [380, 460 v]

17/

13/

Step 3 — Field Fabricate Ductwork —

3/4" FPT DRAIN CONNECTION

1-3/8" DRAIN HOLES

Shaded area indicates block-off panels.

NOTE: Dimensions A, A′, and B, B′ are obtained from field-supplied ceiling diffuser.

Fig. 8 — Concentric Duct Details

Fig. 9 — Condensate Drain Details

(50TJ016,020 Shown)

Secure all ducts to building structure. Use flexible duct connectors between unit and ducts as required. 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 in-

sulated and covered with a vapor barrier.

The 50TJ units with electric heat require a 1-in. clearance

for the first 24 in. of ductwork.

Outlet grilles must not lie directly below unit discharge.

NOTE: A 90-degree elbow must be provided in the ductwork to comply with UL (Underwriters’ Laboratories) codes for use with electric heat.

For vertical supply and return units, tools or parts could drop into ductwork and cause an injury. Install a 90 degree turn in the return ductwork between the unit and the conditioned space. If a 90 degree elbow cannot be installed, then a grille of sufficient strength and density should b e installed to prevent objects from falling into the conditioned space. Due to electric heater, supply duct will require 90 degree elbow.

Step 4 — Make Unit Duct Connections —

Unit is shipped for through-the-bottom duct connections. Ductwork openings are shown in Fig. 6. Field-fabricated concentric ductwork may be connected as shown in Fig. 7 and 8. Attach all ductwork to roof curb and roof curb basepans. Refer to installation instructions shipped with accessory roof curb for more information.

Step 5 — Trap Condensate Drain —

and 9 for drain location. Plug is provided in drain hole and must be removed when unit is operating. One

See Fig. 4, 5,

/4-in. halfcoupling is provided inside unit evaporator section for condensate drain connection. An 81/2 in. x 3/4-in. diameter nipple and a 2-in. x

/4-in. diameter pipe nipple are coupled to standard

/4-in. diameter elbows to provide a straight path down through holes in unit base rails (see Fig. 10). A trap at least 4-in. deep must be used.

NOTE: Do not drill in this area; damage to basepan may result in water leak.

Fig. 6 — Air Distribution — Thru-the-Bottom

(50TJ020-028 Shown)

NOTE: Do not drill in this area; damage to basepan may result in water leak.

Fig. 7 — Concentric Duct Air Distribution

(50TJ020-028 Shown)

Fig. 10 — Make Electrical Connections

TB1 MAXIMUM WIRE SIZE

LEGEND

Fig. 11 — Field Power Wiring Connections

UNIT 50TJ

VOLTAGE

208/230,380 460 575

All

350 kcmil 2/0 2/0

EQUIP —

Equipment

GND —

Ground

kcmil —

Thousand Circular Mils

NEC —

National Electrical Code

TB —

Terminal Block

UNIT LOW-VOLTAGE CONNECTIONS

Fig. 12 — Field Control Thermostat Wiring

Step 6 — Make Electrical Connections

FIEL D POWER SUP PLY — Unit is factory wired for voltage shown on nameplate.

When installing units, provide a disconnect, per NEC (National Electrical Code) requirements, of adequate size (T able 2).

All field wiring must comply with NEC and local requirements.

Route power lines through control box access panel or unit basepan (Fig. 4 and 5) to connections as shown on unit wiring diagram and Fig. 11.

Operating voltage to compressor must be within voltage range indicated on unit nameplate. On 3-phase units, voltages between phases must be balanced within 2% and the current must be balanced within 10%.

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

Unit failure as a result of operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components.

FIELD CONTR OL WIRING — Install a Carrier-approved accessory thermostat assembly according to the installati on instructions included with the accessory. Locate thermostat assembly on a solid wall in the conditioned space to sense average temperature.

Route thermostat cable or equivalent single leads of no. 18 A WG (American Wire Gage) colored wire from subbase terminals through conduit in unit to low-voltage connections as shown on unit label wiring diagram and in Fig. 12.

NOTE: For wire runs up to 50 ft, use no. 18 AWG insulated wire (35 C minimum). For 50 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 direct ly connected to the thermostat and will require a junction box and splice at the thermostat.

Set heat anticipator settings as indicated in Tabl e 3. Settings may be changed slightly to provide a greater degree of comfort for a particular installation.

The correct power phasing is critical in the operation of the scroll compressors. An incorrect phasing will cause the compressor to rotate in the wrong direction. This may lead to premature compressor failure.

Use the following formula to determine the percentage of

voltage imbalance. Percentage of Voltage Imbalance

= 100 x

EXAMPLE: Supply voltage is 460-3-60.

Determine maximum deviation from average voltage:

max voltage deviation from average voltage

average voltage

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

A verage Voltage =

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

(AC) 457 – 455 = 2 v Maximum deviation is 7 v. Determine percent voltage imbalance:

Percentage of Voltage Imbalance = 100 x

= 1.53%

This amount of phase imbalance is satisfactory as it is be-

low the maximum allowable 2%.

455 + 464 + 455

1371

= 457

457

THERMOSTAT ASSEMBLY

REMOVABLE JUMPER

RED

Y1 Y2

BLU

PNK

W1Y2

ORN

VIO

BLK

BRN

WHT

Table 2 — Electrical Data

UNIT 50TJ

016

(15 Tons)

020

(18 Tons)

024

(20 Tons)

NOMINAL

VOLTAGE

(3 Ph,

60 Hz)

208/230 187 253 28.8 195 28.8 195 3 0.5 1.7 3.7 10.5/11.0

380 342 418 15.0 123 15.0 123 3 0.5 1.7 3.7 3.9

460 414 508 14.7 95 14.7 95 3 0.5 0.8 3.7 4.8

575 518 633 10.8 80 10.8 80 3 0.5 0.75 3.0 3.9

208/230 187 253 30.1 225 28.8 195 3 0.5 1.7 5.0 15.8/15.8

460 414 508 15.5 114 14.7 95 3 0.5 0.8 5.0 7.9

575 518 633 12.1 80 10.8 80 3 0.5 0.75 5.0 6.0

208/230 187 253 37.8 239 30.1 225 2 1 6.6 7.5 25.0/25.0

380 342 418 21.2 145 16.7 140 2 1 3.9 7.5 15.0

460 414 508 17.2 125 15.5 114 2 1 3.3 7.5 13.0

575 518 633 12.4 80 12.1 80 2 1 3.4 7.5 10.0

VOLTAGE

RANGE

Min Max RLA LRA RLA LRA Qty Hp FLA (ea) Hp FLA FLA LRA kW FLA MCA MOCP†

COMPRESSOR

No. 1 No. 2

OFM IFM

POWER

EXHAUST

—— — — 81/81 100/100

4.6 18.8 ——85/86 110/110 ——26/34 71/82 102/116 110/125

4.6 18.8 26/34 71/82 108/122 110/125 ——42/56 117/135 159/149 175/175

4.6 18.8 42/56 117/135 165/155 175/175 ——56/75** 156/180 169/194 200/225

4.6 18.8 56/75** 156/180 175/200 200/225 —— — — 43 50

2.3 6.0 —— 45 60 —— 20 30 43 50

2.3 6.0 20 30 46 60 —— 35 52 70 80

2.3 6.0 35 52 73 80 —— — — 40 50

2.3 6.0 —— 43 50 —— 32 39 55 60

2.3 6.0 32 39 58 60 —— 55 66 72 80

2.3 6.0 55 66 75 80 —— 80** 96 102 110

2.3 6.0 80** 96 105 110 —— — — 30 40

2.1 4.8 —— 32 40 —— 50** 48 67 70

2.1 4.8 50** 48 70 70 —— — — 87/87 110/110

4.6 18.8 ——92/92 110/110 ——26/34 71/82 109/122 110/125

4.6 18.8 26/34 71/82 114/128 125/150 ——42/56 117/135 166/155 175/175

4.8 18.8 42/56 117/135 172/161 175/175 ——56/75** 156/180 176/200 200/225

4.6 18.8 56/75** 156/180 182/206 200/225 —— — — 44 50

2.3 6.0 —— 47 60 —— 32 39 59 60

2.3 6.0 32 39 61 70 —— 55 66 76 90

2.3 6.0 55 66 79 90 —— 80** 96 106 125

2.3 6.0 80** 96 109 125 —— — — 34 40

2.1 4.8 —— 36 40 —— — — 116/116 150/150

4.6 18.8 ——120/120 150/150 ——26/34 71/82 120/134 150/150

4.6 18.8 26/34 71/82 126/140 150/150 ——42/56 117/135 178/166 200/175

4.6 18.8 42/56 117/135 183/172 200/175 ——56/75** 156/180 187/211 200/225

4.6 18.8 56/75** 156/180 193/217 200/225 —— — — 66 80

2.3 6.0 —— 68 80 —— 20 30 66 80

2.3 6.0 20 30 68 80 —— 35 52 84 90

2.3 6.0 35 52 87 90 —— — — 57 70

2.3 6.0 —— 59 70 —— 32 39 65 70

2.3 6.0 32 39 68 70 —— 55 66 82 90

2.3 6.0 55 66 85 90 —— 80** 96 112 125

2.3 6.0 80** 96 115 125 —— — — 44 50

2.1 4.8 —— 46 50

ELECTRIC

HEAT*

POWER SUPPLY

Table 2 — Electrical Data (cont)

UNIT 50TJ

(25 Tons)

LEGEND

FLA — HACR— IFM — LRA — MCA — MOCP— NEC — OFM — RLA —

*Heater capacity (kW) is based on heater voltage of 208 v, 240 v,

380 v, 480 v, and 575 v. Heaters are rated at 240 v, 380 v, 480 v, or 600 v. If power distribution voltage to unit varies from rated heater voltage, heater kW will vary accordingly.

†Fuse or HACR circuit breaker.

**Heaters are field installed only. 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. Canadian units may be fuse or circuit breaker.

Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply voltage is greater than 2%.

the percent of voltage imbalance. % Voltage Imbalance

= 100 x

NOMINAL

VOLTAGE

(3 Ph,

60 Hz)

208/230 187 253 41.0 350 37.8 239 2 1 6.6 10.0 28.0/28.0

028

380 342 418 21.8 151 21.2 145 2 1 3.9 10.0 17.0

460 414 508 21.8 158 17.2 125 2 1 2.8 10.0 14.6

575 518 633 17.3 125 12.4 80 2 1 3.4 10.0 13.0

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

max voltage deviation from average voltage

VO LTAG E

RANGE

Min Max RLA LRA RLA LRA Qty Hp FLA (ea) Hp FLA FLA LRA kW FLA MCA MOCP†

Use the following formula to determine

average voltage

COMPRESSOR

No. 1 No. 2

OFM IFM

Example: Supply voltage is 460-3-60.

Determine maximum deviation from average voltage.

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

(AC) 457 – 455 = 2 v Maximum deviation 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.

3. MCA calculation for units with electric heaters over 50 kW = (1.25 x IFM amps) + (1.00 x heater FLA).

POWER

EXHAUST

—— — — 130/130 150/150

4.6 18.8 ——135/135 175/175 ——26/34 71/82 130/138 150/150

4.6 18.8 26/34 71/82 135/143 175/175 ——42/56 117/135 181/170 200/175

4.6 18.8 42/56 117/135 187/176 200/200 — - 56/75** 156/180 191/215 200/225

4.6 18.8 56/75** 156/180 197/221 200/225 —— — — 73 90

2.3 6.0 —— 76 90 —— 20 30 73 90

2.3 6.0 20 30 76 90 —— 35 52 87 90

2.3 6.0 35 52 90 90 —— — — 66 80

2.3 6.0 —— 68 80 —— 32 39 67 80

2.3 6.0 32 39 70 80 —— 55 66 84 90

2.3 6.0 55 66 87 100 —— 80** 96 114 125

2.3 6.0 80** 96 117 125 —— — — 54 70

2.1 4.8 —— 56 70

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

Average Voltage =

= 1.53%

ELECTRIC

HEAT*

= 457

7 457

POWER SUPPLY

452 + 464 + 455

1371

OPTIONAL NON-FUSED DISCONNECT — On units with

CONTROL MODULE

ACTUATOR

ECONOMI$ER

Fig. 14 — 25% Outdoor-Air Section Details

Fig. 15 — EconoMi$er Damper Assembly

— End View

the optional non-fused disconnect, incoming power will be wired into the disconnect switch. Refer to Fig. 13 for wiring for 100 and 200 amp disconnect switches. Units with an MOCP under 100 will use the 100 amp disconnect switch. Units with an MOCP over 100 will use the 200 amp disconnect switch. Refer to the applicable disconnect wiring diagram.

To prevent breakage during shipping, the disconnect handle and shaft are shipped and packaged inside the unit control box. Install the disconnect handle before unit operation. To install the handle and shaft, perform the following procedure:

1. Ope n the control box door and remove the handle and shaft from shipping location.

2. Loosen the A llen bolt located on the disconnect switch. The bolt is located on the square hole and is used to hold the shaft in place. The shaft cannot be inserted until the Allen bolt is moved.

3. Insert the disconnect shaft into the square hole on the disconnect switch. The end of the shaft is specially cut and the shaft can only be inserted in the correct orientation.

4. Tighten the Allen bolt to lock the shaft into position.

5. Close the control box door.

6. Attach the handle to the external access door with the two screws provided. When the handle is in the ON position, the handle will be vertical. When the handle is in the OFF position, the handle will be horizontal.

7. Turn the handle to the OFF position and close the door. The handle should fit over the end of the shaft when t he door is closed.

8. The ha ndle must be in the OFF position to open the control box door.

OPTIONAL CONVENIENCE OUTLET — On units with optional convenience outlet, a 115-v GFI (ground fault interrupt) convenience outlet receptacle is provided for field wiring. Field wiring should be run through the

/8-in. knockout pro-

vided in the basepan near the return air opening.

Step 7 — Make Outdoor-Air Inlet Adjustments

MANUAL OUTDOOR-AIR DAMPER — All units (except those equipped with a factory-installed economizer) have a manual outdoor-air damper to provide ventilation air. Damper can be preset to admit up to 25% outdoor air into return-ai r compartment. To adjust, loosen securing screws and move damper to desired setting. Then retighten screws to secure damper (Fig. 14).

OPTIONAL ECONOMI$ER EconoMi$er Motor Control Module (Fig. 15-17)

ECONSP dial to the ‘ ‘D’’ setting (Fig. 16). The control module is located on the EconoMi$er motor. See Fig. 15 and 17.

Damper Vent Position Setting

1. Set fan switch at ON position (continuous fan operation) and close night switch if used.

2. Set system selector switch to OFF position.

3. Turn Min Pos (%) dial slowly until dampers assume desired vent position.

Do not manually operate EconoMi$er

motor since damage to motor will result.

— Set the

NOTE: The disconnect takes the place of TB-1 as shown on the unit wiring diagram label and the component arrangement label.

Fig. 13 — Optional Non-Fused Disconnect Wiring

6T3 4T2 2T1 LOAD

5L3 3L2 1L1 LINE

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