Carrier 48HJ020-028 User Manual

Single Package Rooftop Units

Gas Heating/Electric Cooling

Installation, Start-Up and

Service Instructions

48HJ020-028

CONTENTS

Page

SAFETY CONSIDERATIONS .......................... 1,2

INSTALLATION ...................................... 2-17

Step 1 -- Provide Unit Support ......................... 2

• ROOF CURB

• ALTERNATE UNIT SUPPORT

• SLAB MOUNT

Step 2 -- Remove Shipping Rails ....................... 2

Step 3 -- Rig and Place Unit ............................ 2

• POSITIONING

• ROOF MOUNT

• INSTALLATION ONTO CURB

Step 4 -- Field Fabricate Ductwork ..................... 9

Step 5 -- Make Unit Duct Connections .................. 9

• VERTICAL CONFIGURATION

• HORIZONTAL APPLICATIONS

Step 6 -- Install Flue Hood and Inlet Hood ............ 10

Step 7 -- Trap Condensate Drain ..................... 10

Step 8 -- Install Gas Piping ........................... 10

Step 9 -- Make Electrical Connections ................. 11

• FIELD POWER SUPPLY

• FIELD CONTROL WIRING

Step 10 -- Install Outdoor-Air Hood ................... 12

• MANUAL DAMPER ASSEMBLY

Step 11 -- Position Optional Power

Exhaust or Barometric Relief Damper Hood ........ 16

Step 12 -- Non-Fused Disconnect .................... 16

Step 13 -- Install All Accessories ..................... 16

PRE-START-UP ....................................... 18

START-UP ........................................... !8-46

Unit Preparation ...................................... 18

Compressor Mounting ................................ 18

Refrigerant Service Parts ............................. !8

Crankcase Heater(s) .................................. !8

Compressor Phasing ................................. 18

Internal Wiring ........................................ 18

Evaporator Fan ....................................... 18

Condenser Fans and Motors .......................... 19

Return Air Filters ..................................... 19

Outdoor Air Inlet Screens ............................. 19

Gas Heat .............................................. 19

Optional EconoMi$er IV............................... 40

Operating Sequence .................................. 45

SERVICE ............................................ 4(,-54

Cleaning .............................................. 46

Lubrication ........................................... 46

Evaporator Fan Service and Replacement ............ 47

Evaporator Fan Performance Adjustment ............. 47

Belt Tension Adjustment .............................. 47

Condenser-Fan Adjustment ........................... 47

Power Failure ......................................... 48

Refrigerant Charge ................................... 48

Gas Valve Adjustment ................................ 48

Main Burners ......................................... 48

Filter Drier ............................................ 50

Protective Devices .................................... 50

Relief Devices ......................................... 50

Page

Control Circuit, 24-V .................................. 50

Replacement Parts .................................... 50

Diagnostic LEDs ...................................... 50

TROUBLESHOOTING .............................. 55-59

Unit Troubleshooting .................................. 55

EconoMi$er IV Troubleshooting ....................... 58

START-UP CHECKLIST .............................. CL-!

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be hazardous due to system plessure and electrical compo- nents. Only trained and qualified service personnel should install, repair, or service air-conditioning equipment.

Untrained personnel can perform the basic maintenance functions of cleaning coils and filters and replacing filters. All other operations should be performed by trained service per- sonnel. When working on _fir-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 extinguishers available for fill brazing operations.

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

1. Improper inst_fllation, adjustment, alteration, service,

or maintenance can cause property &Lmage, personal injury, or loss of life. Refer to the User's Information Manual provided with this unit for mole details.

2. Do not stole or use gasoline or other flammable vapors and liquids in the vicinity of this or any other appliance.

What to do if you smell gas:

1. DO NOT try to light any appliance.

2. DO NOT touch any electrical switch, or use any phone in your building.

3. IMMEDIATELY call your gas supplier from a neigh- bor's phone. Follow the gas supplier's instructions.

4. If you cannot reach your gas supplier, c_dl the fire department.

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

Bookl 1 Catalog No. 04-53480011-01 Printed in U.S,A. Form 48HJ-31SI Pg 1 10-05 Replaces: 48HJ-27SI Tab Ila

Disconnect gas piping from unit when pressure testing at pressure greater than 0.5 psig. Plessmes greater than

0.5 psig will cause gas valve damage resulting in hazardous condition. If gas valve is subjected to pressure greater than

0.5 psig, it must be replaced before use. When pressme testing field-supplied gas piping at pressures of 0.5 psig or less, a unit connected to such piping must be isolated by closing the manual gas v_dve(s).

IMPORTANT: Units have high ambient temperature] operating limits. If limits are exceeded, the units will auto-

matically lock the compressor out of operation. Manual reset will be required to restart the compressol:

INSTALLATION

Step 1 -- Provide Unit Support

ROOF CURB -- Assemble or install accessory roof curb in accor&mce with instructions shipped with this accessory. See Fig. 1. Install insulation, cant strips, roofing, and counter flash- ing as shown. Ductwork can be installed to roof curb before unit is set in place. Ductwork must be attached to curb and not to the unit. Curb must be level. This is necessary to permit unit drain to function properly. Unit leveling tolerance is _+J/l(_in. per line,u ft in any direction. Refer to Accessory Roof Curb In- st',_lation Instructions for additional information as required.

When accessory roof curb is used, unit may be installed on

class A, B, or C roof covering materi_d. Carrier roof curb acces- sories are for flat roofs or slab mounting.

IMPORTANT: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasket with the roof curb as shown in Fig. 1. Improperly applied gasket can also result in air leaks and poor unit performance. Do not slide unit to position on roof curb.

ALTERNATE UNIT SUPPORT- When a curb cannot be used, install unit on a noncombustible surface. Support unit

with sleepeLs, using unit curb support area. If sleepers cannot be used, support long sides of unit with a minimum of 3 eqmfl- ly spaced 4-in. x 4-in. pads on each side.

SLAB MOUNT (Horizontal Units Only) -- Provide a level concrete slab that extends a minimum of 6 in. beyond unit cab- inet. Install a gravel apron in fi_mt of condenser coil air inlet to plevent gross and foliage from obstructing airflow.

NOTE: Horizontal units may be installed on a roof curb if required.

Step 2 -- Remove Shipping Rails -- Remove ship-

ping rails prior to lowering unit onto roof curb. See Fig. 2. The rails are attached to the unit at both the return end and condens-

er end. Remove the sclews from both ends of each rail. Be c_u'eful not to drop the rails onto gray surface that could be

dmnaged. Disc_ud the rails. It is important to replace the sclews into the unit to avoid any air or water leakage.

Step 3 -- Rig and Place Unit -- Inspect unit for trans- portation &image. See Tables 1-3 for physical data. File any

claim with transportation agency.

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

result.

Do not diop unit; keep upright. Use spreader baLs over unit

to prevent sling or cable damage. Rollers may be used to move unit across a roof. Level by using unit fralne as a leference;

leveling tolerance is _+1/1(_in. per linetu ft in any direction. See Fig. 3 for additional information. Unit rigging weight is shown

in Fig. 3.

Four lifting holes tue provided in the unit base mils as

shown in Fig. 3. Refer to rigging instructions on unit. POSITIONING -- Maintain clearance, per Fig. 4, around and

above unit to provide minimum distance from combustible materials, proper airflow, and service access.

Do not inst_dl unit in an indoor location. Do not locate air

inlets near exhaust vents or other sources of contaminated ai_: For proper unit operation, adequate combustion and ventilation

air must be provided in accordance with Section 5.3 (Air for Combustion and Ventilation) of the Natiomd Fuel Gas Code,

ANSI Z223.1 (American National Standmds Institute).

Although unit is weatherproof, guard against water from

higher level runoff and overhangs.

Ix)cate mechanical diaft system flue assembly at least 4 ft

from any opening through which combustion products could enter the building, and at least 4 ft from any adjacent building

(or per local codes). When unit is located adjacent to public w_dkways, flue assembly must be at least 7 ft above grade.

ROOF MOUNT -- Check building codes for weight distribu- tion requirements. Unit operating weight is shown in Table 1. INSTALLATION ONTO CURB- The 48HJ units are de-

signed to fit on the accessory full perimeter curb. Correct placement of the unit onto the curb is critical to operating per-

formance. To aid in correct positioning, 3/s-in. diameter locat- ing holes have been added to the unit base rails. When placing

the unit, these holes should line up with the roof curb edge as shown in Fig. 5 and 6, to assure proper duct opening alignment.

For placement on the roof curb, use the alignment holes located approximately 2-in. fiom the end of the base rail on the return

end of the unit. See labels on the side of the unit for more details.

Do not slide unit to position it when it is sitting on the curb. Curb gasketing material may be &_maged and leaks may

result.

Do not allow the shipping rail to drop on the roof surface. Dmnage to the roof surface may result.

RONT

ATTACfl DUCT TO ROOF CURB

_OU}L/_I OF BOTiOM

8F UNIT

_PLAN VI{_ OF ROOF CUR8

MAX CURB LEVELING TOLERANCES:

R08FCDR5 DES _ 88 [N

CRIFCUIBO_BCOQ ii iCRRFCURS0! 9C05 28 57 28 _

,--GASKET

i {SSPPL][D _l_t i _URB_

]

_NSULATION

(FIELD SUPPL_EO!

UNiT

OPENINGS

A B

RE_URN

m5 [1tl

BACKEN_

FROM

CHARi

(T£)

SECTIONCiC

Fig. 1 -- Roof Curb Details

SUPPLY AIR

VIEW"A-A"

Fig. 2 -- Shipping Rail Removal

CAUTION NOTICETO RIGGERS:

ALL PAI_,.S MUSTBEIN PLACE_ RIGGING.

NOTICETO RIGC-B_& Rig by insertinghooksinto unit base rais as shown. Maintaina cistance of 120 inches (3048 MM) from top of unit to eyehook. Leave co] cover attached to unit _ riggbg to

protect coil of unit from damage.

UNIT SIZE MAXWEIGHT

020 3358 024 3380

028 3769

(Ib)

CENTER OF GRAVITY

(in.)

X Y Z

63.9 34.0 30.5

63.9 34.5 30.5

67.8 35.0 35.0

NOTE: Add 1501b(68kg) for domesticoratb9.

10"-0"

(3048 MM)

Fig. 3-- Rigging Details

F ..........................

,_A

UNIT SiZE

HJO20

HJ024

HJO88

OPZRATIRG N_T CORNER WEIGHT

WEIGHT LOW HEI6_T CENT[R OF GRAVITY LOCATION L_ [NGI

j x i _ z

58 118 54 112 33 1/2 30 610 751 387 4762224 11008} [1476} (1538} [851] 1752] 1277] [_41 [1761 (2!6

[476 116251 I ] i ] 283] 345 1181i 221

2526 [t14_] 70 /8 58 34112 34-1/Z 652 859 434 571

[7811 (t727] [876] [B76] i300] 390 [1981 [2601

_OIRECTiON OF AIRFLOW

CENTER OF GRAVITY

[121]

[15491

OUfSI_E AIR " " I_TA_E aOOD *

= _ _ = = , _

_ _;5_/° _ol

79- 1/8

12010]

(PO_ER)

LEFT

S_E

_OR-FUSED DISCO_R[C__ _AROLE (OPTIONIFIZLO

IRSTALLEO)

Fig. 4 -- Base Unit Dimensions

_t9 1/2

SUPPLY

EXHAUST

149_

'DUCT SIZE

[)321 1791

11208]

VIEWA-A

86-5/1G

[21931

CONDENSERCOIL

8_ 5/8

[2199]

RIGHT

SIDE

/" ACCESS PANEL

UNIT 48HJ

NOMINAL CAPACITY (tons)

OPERATING WEIGHT (Ib)

AI/AI*

COMPRESSOR

Quantity Number of Refrigerant Circuits Oil (ounces) Ckt A...Ckt B...Ckt C

REFRIGERANT TYPE

Expansion Device Operating Charge (Ib)

Circuit A Circuit B

Circuit C

CONDENSER FAN

Nominal Cfm (Total, all fans) Quantity...Diameter (in.) Motor Hp...Rpm Watts Input (Total)

CONDENSER COIL

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

EVAPORATOR FAN

Quantity...Size Type Drive

Nominal Cfm Motor Bearing Type

Maximum Allowable Fan Rpm

EVAPORATOR COIL

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

FURNACE SECTION

Rollout Switch Cutout Temp (F)

Burner Orifice Diameter (in....drill size)

Gas Thermostat Heat Anticipator Setting

Stage 1 (amps) Stage 2 (amps)

Gas Input (Btuh) HIGH HEAT

Efficiency (Steady State) %

Temperature Rise Range

Gas Input (Btuh) MEDIUM HEAT

Efficiency (Steady State) %

Temperature Rise Range

Gas Input (Btuh) LOW HEAT

Efficiency (Steady State) %

Temperature Rise Range (F)

Manifold Pressure

Natural Gas (in. wg)

Natural Gas (in. wg) Gas Valve Quantity Gas Valve Pressure Range

Min-Max Allowable Field Gas Connection Size (in. FPT)

HIGH-PRESSURE SWITCH (psig)

Cutout Reset (Auto)

OUTDOOR-AIR INLET SCREENS

Quantity...Size (in.)

RETURN-AIR FILTERS

Quantity...Size (in.)

LEGEND

N/A -- Not Applicable

TXV -- Thermostatic Expansion Valve

Stage 1 Stage 2

Vertical

Stage 1 Stage 2

Vertical

Stage 1 Stage 2

Vertical

Horizontal

(in. wg) (psig)

Table 1-- Physical Data

020 024 028

18 20 25

2224 2272 2526

3 3 2 3 3 2

68...68...90 90...90...90 110... 110...N/A R-22 R-22 R-22

TXV TXV TXV

13.1 13.8 21.8

12.7 13.9 20.3

15.2 15.5 N/A

14,000 14,000 21,OOO

4...22 4...22 6...22

1/4...110O 1/4...11O0 1/4._1100

1400 1400 2100

2...17 2...17 2...17

57.78 57.78 66.67

2...15xl 1 2...15xl 1 2...15xl 1 Belt Belt Belt

7000 8000 10,000

Ball Ball Ball

1400 1400 1400

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

23.33 23.33 27.22

225

0.136...29 Natural

0.98

0.44 317,000 400,000

25-55

281,000 365,000

25-55

199,000

250,000

15-45

3.00

2.95

5.5-13.0

.235-.469

s/4

426 426 426 320 320 320

3...20x25 3...20x25 3...20x25

9...16x25 9...16x25 9...18x24 *Aluminum ew _oratorcoiland aluminum condensercoil.

225

0.136...29 Natural

0.98

0.44 317,000 400,000

25-55

281,000 365,000

25-55

199,000 250,000

15-45

3.00

2.95

5.5-13.0

.235-.469

s/4

225

0.136._29 Natural

0.98

0.44

317,000

400,000

25-55

281,000

365,000

25-55

199,000

250,000

15-45

3.00

2.95 1

5.5-13.0

.235-.469

Table 2 -- Fan Motor and Drive Data -- Vertical Supply/Return

48HJ

LOW RANGE

Motor Hp Motor Nominal Rpm Maximum Continuous Bhp

Maximum Continuous Watts Motor Frame Size

Motor Shaft Diameter (in.) Fan Rpm Range Motor Pulley Min, Pitch Diameter (in.) Motor Pulley Max, Pitch Diameter (in,) Blower Pulley Pitch Diameter (in.) Blower Pulley Shaft Diameter (in.) Blower Pulley Type Pulley Center Line Distance (in.) Belt, Quantity,.,Type..,Length (in.) Speed Change Per Turn -- Moveable Pulley (rpm) Moveable Pulley Maximum Full Turns Factory Speed Setting (rpm)

MID-LOW RANGE

Motor Hp Motor Nominal Rpm Maximum Continuous Bhp

Maximum Continuous Watts Motor Frame Size

MID-HIGH RANGE

Motor Hp Motor Nominal Rpm Maximum Continuous Bhp

Maximum Continuous Watts Motor Frame Size

Motor Shaft diameter (in.) Fan Rpm Range Motor Pulley Min, Pitch Diameter (in.) Motor Pulley Max. Pitch Diameter (in,) Blower Pulley Pitch Diameter (in.) Blower Pulley Shaft Diameter (in.) Blower Pulley Type Pulley Center Line Distance (in.) Belt, Quantity...Type..,Length (in.) Speed Change Per Turn -- Moveable Pulley (rpm) Moveable Pulley Maximum Full Turns Factory Speed Setting (rpm)

HIGH RANGE

Motor Hp Motor Nominal Rpm Maximum Continuous Bhp

Maximum Continuous Watts Motor Frame Size

Motor Shaft Diameter (in.) Fan Rpm Range Motor Pulley Min. Pitch Diameter (in.) Motor Pulley Max. Pitch Diameter (in,) Blower Pulley Pitch Diameter (in.) Blower Pulley Shaft Diameter (in.) Blower Pulley Type Pulley Center Line Distance (in.) Belt, Quantity...Type..,Length (in.) Speed Change Per Turn -- Moveable Pulley (rpm) Moveable Pulley Maximum Full Turns Factory Speed Setting (rpm)

LEGEND

Bhp -- Brake Horsepower N/A -- Not Applicable

020

203/230 and 460 V

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

3.7

1725

4.25

3698

56HZ

647-886

2.7

3.7

7.2

1.1875 Fixed

11.293-13.544

1._BX_.38 48

767

1745

5.75

4900

$184T

l_&

897-1139

3.7

4.7

7.2

1.1875 Fixed

9,81-13.055

1..,BX-.38 48

1018

7.5

1745

8.63

7267

$213T

13&

1078-1274

5.5

6.5

8.9

1.1875 Fixed

9.025-12.179

1..,BX_.42 39

1176

575 V

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

1725

3.45 3149 56HZ

810-1072

3.1

4.1

6.6

1,1875

Fixed

11.286-14.475

1..,BX,..38 52

941

1745

5.75

4900

184T

11/8

873-1108

3.7

4.7

7.4

1,1875

Fixed

9.81-13.055

1..,BX_.38 47

991

7.5

1745

8.63

7267

$213T

13&

1078-1274

5.5

6.5

8.9

1.1875 Fixed

9.025-12.179

1...BX_.42 39

1176

024

203/230 and 460 V

3.7

1725

4.25

3698

56HZ

7/8

685-939

2.7

3.7

6.8

1.1875 Fixed

11.293-13.544 1,..BX_.38

812

5 1745 5,75

4900

$184T

11&

949-1206

3.7

4.7

6.8

1.1875 Fixed

9.81-13.055 1_.BX...38

1078

7.5

1745

8.63

7267

$213T

13/8

941-1176

4.8

6.0

8.9

1.1875 Fixed

9.025-12,179 1,.BX.-42

1059

1745

11.5

9582

$215T

1014-1297

4.3

5.5

7.4

1.1875 Fixed

9.025-12.179 2_.BX._38

1156

575 V

1745

5.75 4900 184T

751-954

3,7

4.7

8.6

1.1875 Fixed

9.81-13.055

1...BX_.40 41

853

1745

5.75 4900 184T

l_&

949-1206

3.7

4.7

6.8

1.1875 Fixed

9.81-13.055

1..BX._38 51

1078

7.5

1745

8.63

7267

$213T

13/8

941-1176

4.8

6.0

8.9

1.1875 Fixed

9.025-12,179

1...BX-,42 47

1059

1745

11.5

9582

$215T

1014-1297

4.3

5.5

7.4

1.1875 Fixed

9.025-12.179

2..BX_,38 57

1156

O28

203/230 and 460 V

1745

5.75

4900

$184T

687-873

3.7

4.7

9.4

1.1875 Fixed

9.81-13.055

1..BX._41 37

78O

1745

5.75

4900

$184T

l_&

805-1007

4.8

6.0

10.4

1.1875 Fixed

9.81-13.055 1_.BX_,45

906

7.5

1745

8.63

7267

$213T

941-1176

4.8

6.0

8.9

1.1875 Fixed

9.025-12.179

1.,BX.-42 47

1059

1745

11.5

9582

$215T

1014-1297

4.3

5.5

7.4

1.1875 Fixed

9.025- 2.179

2._BX._38 57

1156

575 V

1745

5.75 4900 184T

11&

687-873

3.7

4.7

9.4

1.1875 Fixed

9.81-13.055 1_.BX_.41

78O

1745

5.75 4900 184T

l_&

805-1007

4.8

6.0

10.4

1.1875 Fixed

9.81-13.055 1_.BX._45

906

7.5

1745

8.63

7267

S213T

13&

941-1176

4.8

6.0

8.9

1.1875 Fixed

9.025-12.179 1_.BX._42

1059

1745

11.5

9582

S215T

13&

1014-1297

4.3

5.5

7.4

1.1875 Fixed

9.025-12.179 2_.BX._38

1156

Table 3 -- Fan Motor and Drive Data -- Horizontal Supply/Return

48HJ

LOW RANGE

Motor Hp Motor Nominal Rpm Maximum Continuous Bhp

Maximum Continuous Watts Motor Frame Size

Motor Shaft Diameter (in.) Fan Rpm Range Motor Pulley Min. Pitch Diameter (in,) Motor Pulley Max, Pitch Diameter (in.) Blower Pulley Pitch Diameter (in.) Blower Pulley Shaft Diameter (in,) Blower Pulley Type Pulley Center Line Distance (in.) Belt, Quantity..,Type...Length (in,) Speed Change Per Turn -- Moveable Pulley (rpm) Moveable Pulley Maximum Full Turns Factory Speed Setting (rpm)

MID-LOW RANGE

Motor Hp Motor Nominal Rpm Maximum Continuous Bhp

Maximum Continuous Watts Motor Frame Size

Motor Shaft Diameter (in.) Fan Rpm Range Motor Pulley Min. Pitch Diameter (in,) Motor Pulley Max, Pitch Diameter (in.) Blower Pulley Pitch Diameter (in,) Blower Pulley Shaft Diameter (in,) Blower Pulley Type Pulley Center Line Distance (in.) Belt, Quantity..,Type...Length (in,) Speed Change Per Turn -- Moveable Pulley (rpm) Moveable Pulley Maximum Full Turns Factory Speed Setting (rpm)

MID-HIGH RANGE

Motor Hp Motor Nominal Rpm Maximum Continuous Bhp

Maximum Continuous Watts Motor Frame Size

Motor Shaft Diameter (in.) Fan Rpm Range Motor Pulley Min. Pitch Diameter (in,) Motor Pulley Max. Pitch Diameter (in.) Blower Pulley Pitch Diameter (in.) Blower Pulley Shaft Diameter (in,) Blower Pulley Type Pulley Center Line Distance (in,)

Belt, Quantity.,.Type.,.Length (in,) Speed Change Per Turn -- Moveable Pulley (rpm) Moveable Pulley Maximum Full Turns Factory Speed Setting (rpm)

HIGH RANGE

Motor Hp Motor Nominal Rpm Maximum Continuous Bhp

Maximum Continuous Watts Motor Frame Size

Motor Shaft Diameter (in.) Fan Rpm Range Motor Pulley Min. Pitch Diameter (in.) Motor Pulley Max. Pitch Diameter (in.) Blower Pulley Pitch Diameter (in.) Blower Pulley Shaft Diameter (in,) Blower Pulley Type Pulley Center Line Distance (in,) Belt, Quantity.,.Type.,.Length (in,) Speed Change Per Turn -- Moveable Pulley (rpm) Moveable Pulley Maximum Full Turns Factory Speed Setting (rpm)

LEGEND

Bhp -- Brake Horsepower N/A -- Not Applicable

020

203/230 and 460 V

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

3.7

1725

4.25

3698

56HZ

7/s

896-1227

2.7

3.7

5.2

1.1875 Fixed

11.293-13.544

1..,BX,..35 66

1062

5 1745 5,75

4900

$184T

l_&

1113-1414

3.7

4.7

5.8

1.1875 Fixed

9.81-13.055 1 .-BX,..35

1264

7.5

1745

8.63

7267

$213T

13&

1096-1339

5.4 6,6

8.6

1.1875 Fixed

9.025-12.179

1._BX...42 49

1218

575 V

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

1725

3.45 3149 56HZ

863-1141

3.1

4.1

6.2

1.1875 Fixed

11.286-14.475

1._BX...38 56

1002

1745

5.75

4900

184T

1042-1285

4.3

5.3

7.2

1.1875 Fixed

9.81-13.055

1..,BX.,.38 48

1164

7.5

1745

8.63

7267

$213T

13/8

1096-1339

5.4

6.6

8.6

1.1875 Fixed

9.025-12.179

1._BX_.42 49

1218

024

203/230 and 460 V

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

3.7

1725

4.25 3698 56HZ

896-1227

2.7

3.7

5.2

1.1875 Fixed

11.293-13.544

1._BX..,35 66

1062

1745

5.75

4900

$184T

11&

1113-1414

3.7

4.7

5.8

1.1875 Fixed

9,81-13.055

1,.,BX,.,35

1264

7.5

1745

8.63

7267

S213T

1096-1339

5.4

6.6

8.6

1.1875 Fixed

9.025-12.179 1,.,BX_,42

1218

575 V

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

1745

5.75 4900 184T

11/s

873-1108

3.7

4.7

7.4

1.1875 Fixed

9.81-13.055

1.,.BX,_38 47

991

1745

5.75 4900 184T

11/s

1113-1414

3.7

4.7

5.8

1.1875 Fixed

9.81-13.055

1.,.BX..,35 60

1264

7.5

1745

8.63

7267

S213T

13/s

1096-1339

5.4

6.6

8.6

1.1875 Fixed

9.025-12.179

1.,.BX..,42 49

1218

028

203/230 and 460 V

1745

5.75

4900

S184T

11/8

687-873

3,7 4,7 9,4

1.1875 Fixed

9.81-13.055 1-BX.-41

78O

1745

5.75

4900

S184T

11/8

605-1007

4.6

6.0

10,4

1.1875 Fixed

9.81-13.055

1.,.BX..,45 4O

906

7.5

1745

8.63

7267

S213T

13/8

941-1176

4.8 6,0 8,9

1.1875 Fixed

9.025-12.179 1-.BX...42

1059

1745

11,5

9582

S215T

13/s

1014-1297

4,3 5,5 7,4

1.1875 Fixed

9,025-12,179

1.,BX..,38 57

1156

575 V

1745

5.75

4900

184T

l_&

687-873

3.7

4.7

9.4

1.1875 Fixed

9.81-13.055

1...BX_.41 37

78O

1745

5.75

4900

184T

l_&

805-1007

4.8

6.0

10.4

1.1875 Fixed

9.81-13.055

1..,BX,..45 4O

906

7.5

1745

8.63

7267

S213T

13&

941-1176

4.8

6.0

8.9

1.1875 Fixed

9.025-12.179 1,.,BX,..42

1059

1745

11.5

9582

S215T

13&

1014-1297

4.3

5.5

7.4

1.1875 Fixed

9.025-12.179 1,.,BX,..38

1156

ALIGNMENT HOLES FOR

CURB-BOTH

SIDES

ALIGNMENT

HOLE

(IN BASE RAIL)_

HOLE SHOULD

LINE UP WITH

ROOF CURB

_q ALIGNMENT

EDGE FLANGE

Fig. 5 -- Alignment Hole Details

RETURN SUPPLY I_/

OPENING OPENING

CURB CURB_F

RETURN SUPPLY L

OPENING OPENINg.

ROOF CURB

Fig. 6 -- Alignment Hole Location

For vertical supply and return units, tools or pmls could diop into ductwork and cause an injury. [nst_dl a 90-degree

turn in the return ductwork between the unit and the condi- tioned space. If a 90-degree elbow cannot be installed, then

a grille of sufficient strength and density should be installed to prevent objects from f_dling into the conditioned space.

HORIZONTAL APPLICATIONS-- Horizontal units are shipped with outer panels that allow for side by side horizontal

duct connections. If specified during ordering, the unit will be shipped with the vertical duct openings blocked off from the factory, ready for side supply installation. If the horizontal supply#eturn option was not specified at time of ordering the unit, a field-installed accessory kit is requiled to convert the vertical unit into a horizontal supply configuration.

Installation of the duct block-off covers should be complet- ed prior to placing the unit unless sufficient side cle_u'ance is available. A minimum of 66 in. is required between the unit and any obstruction to install the duct block-off covers. Side supply duct dimensions and locations tue shown on Fig. 4. Install ductwork to horizontal duct flange connections on side

of unit.

ECONOMIZER

Step 4 -- Field Fabricate Ductwork -- On vertical

units, secure all ducts to roof curb and building structure. Do not connect ductwork to unit. For horizontal applications, field- supplied flanges should be attached to horizontal discharge openings and all ductwork secured 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 barriel:

if a plenum return is used on a vertic_fl unit, the return

should be ducted through the roof deck to comply with applica- ble fire codes.

A minimum clearance is not required around ductwork. Cabinet leturn-air static plessure (a negative condition) shall not exceed 0.35 in. wg with economizer or 0.45 in. wg without

economizel:

These units are designed for a minimum continuous return- air temperature in heating of 50 F (dry bulb), or an intermittent operation down to 45 F (di_ bulb), such as when used with a night set-back thermostat.

To operate at lower return-air temperatures, a field-supplied outdoor-air temperature control must be used to initiate both stages of heat when the temperature is below 45 R Indoor com- fort may be compromised when these lower air temperatures are used with insufficient heating temperature rise.

Step 5 -- Make Unit Duct Connections

VERTICAL CONFIGURATION -- Unit is shipped for ver- tical supply and return duct connections. Ductwork openings are shown in Fig. 1 and 4. Duct connections for vertical configuration are shown in Fig. 7. Field-fabricated concentric ductwork may be connected as shown in Fig. 8 and 9. The unit is designed to attach the ductwork to the roof curb. Do not attach duct directly to the unit.

\ HEAT

SEE EXCHANGER NOTE

@AIR

OUT

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

water leak,

Fig. 7 -- Air Distribution -- Vertical Supply/Return

ECONOMIZER

SEE

AIR OUT AIR IN AIR OUT

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

SEE HEAT

EXCHANGER

NOTE

Fig. 8 -- Air Distribution -- Concentric Duct

BAFFLE

NOTE: DimensionsA, A', B,and B' are obtained fromfield-supplied ceiling diffuser.

;_ Shaded areas indicate block-offpans.

Fig. 9 -- Concentric Duct Details

Step 6 -- Install Flue Hood and Inlet Hood --

Flue hood (smaller hood), inlet hood (larger hood), and screens are shipped inside the unit in the fan section. To install, remove

the heat panel. Tile flue hood is attached to the heat section panel from the outside using tile sclews provided. See Fig. 10.

Tile inlet hood is installed by inselling the hood through the

back of the heat panel. Attach the hood by inserting the screws provided through the clearance holes in the heat panel and into

the intake hood.

Install the screens into both hoods using file screws and re-

taining nuts provided with the unit.

Attach the cover of the observation hole on the intake hood

and then replace the heat panel onto the unit to complete the in- stfdlation.

NOTE: When properly installed, the flue hood will line up with the combustion fan housing. See Fig. 11.

Step 7 -- Trap Condensate Drain -- See Fig. 12

for drain location. One 3/4-in. half coupling is provided outside unit evaporator section for condensate drain connection. A trap fit least 4-in. deep must be used. See Fig. 13.

All units must have an external trap for condensate drain- age. Install a trap fit least 4 in. deep and protect against freeze- up. If drain line is installed downstremn from the external trap, pitch the line away from the unit fit 1 in. per 10 11of run. Do not use a pipe size smaller than the unit connection.

Step 8 -- Install Gas Piping -- Unit is equipped for

use with natural gas. Refer to local building codes, or in the absence of local codes, to ANSI Z223.1-1atest year and addendum Z223.1A-latest year entitled NFGC. [n Canada,

installation must be in accordance with the CANI .B149.1 and CAN 1.B 149.2 installation codes for gas burning appliances.

Support gas piping. For exanlple, a 3/4-in. gas pipe must have one field-fabricated support bemn every 8 11.Thelefore,

an 18-1l long gas pipe would have a minimum of 3 support beams.

Instfdl field-supplied manual gas shutoff valve with a 1/8-in. NPT pressure tap for test gage connection fit unit. Tile pressure tap is located on the gas manifold, adjacent to the gas valve. Field gas piping must include sediment trap and union. See Fig. 14.

FLUE HOOD

INLET HOOD

Fig. 10 -- Flue and Inlet Hood Locations

COMBUSTION FAN HOUSING

HEAT EXCHANGER- SECTION

INDUCED-DRAFT

-MOTOR MAIN BURNER

-SECTION

Fig. 11 -- Combustion Fan Housing Location

Do not pressure test gas supply while connected to unit. Always disconnect union before servicing. A hazardous condition could occur resulting in serious injury.

I MPORTANT: Natural gas pressure at unit gas connectionmust not be less than 5.5 in. wg or greater than 13.0 in. wg.

Size gas-supply piping for 0.5-in. wg maximum pressure

drop. Do not use supply pipe smaller than unit gas connection.

•DAMPER MOTOR

Og#gSA,E

DRAIN CONNECTION [12081

/ 5-1/4

[132]

AiR AIR

Fig. 12- Condensate Drain Details

MINIMUM PITCH ONE IN PER

SUPPLY RETURN

Step 9 -- Make Electrical Connections

FIELD POWER SUPPLY- Unit is factory wired for volt- age shown on unit nameplate. Be sure to check for conect

voltage.

When installing units, provide disconnect per NEC (Nation-

al Electrical Code) of adequate size (MOCP [Maximum Over- current protectionl of unit is on the informative plate). See

Tables 4A and 4B. All field wiring must comply with NEC and local codes. Size wire based on MCA (Minimum Circuit Amps) on the unit informative plate. See Fig. 15 for power

wiring connection to the unit power terminal block and equip- ment ground.

Route power and ground lines through control box end pan-

el or unit basepan (see Fig. 4) to connections as shown on unit wiring diagram and Fig. 15.

The correct power phasing is critical to the operation of the scroll compressors. An incorrect phasing will result in compressor shutdown on thermal overload and possible &_mage to compressor. Should this occur, power phase correction must be made to the incoming powel:

Unit cabinet must have an uninterrupted, unbroken electri- c_fl ground to minimize the possibility of peLsonal injury if an electrical fault should occur This ground may consist of electric_d wire connected to unit ground lug in control com- partment, or conduit approved for electrical ground when installed in accordance with NEC, ANSI/NFPA (National Fire Protection Association), latest edition, and loc_d elec- triced codes. Do not use gas piping as an electrical ground Failure to follow this warning could result in the installer being liable for personal injury of others.

10 FT ()F LINE

TO ROOF

DRAIN

DRAIN PLUG

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

Fig. 13- Condensate Drain Piping Details

MANUAL SHUTOFF (FIELD SUPPLIED)

UNIT

i _-"--- SEDIMENT TRAP

FT'I

PRESSURE TAP (1/8" NPT PLUG)

SEE

NOTE

ROOF CURB

SUPPLY

Field wiring must conform to temperature limitations for

type "T' wire. All field wiring must comply with NEC and local requirements.

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%.

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

FIELD CONTROL WIRING -- Unit can be controlled with a Carrier-approved accesso q thermostat. Install thermostat ac-

cording to the installation instructions included with accessory. Ix)cate thermostat assembly on a solid interior w_dl in the con- ditioned space to sense average temperature.

Route thermostat cable or equivalent single leads of colored wire from subbase terminals through conduit into unit to low- voltage connections as shown on unit label wiring diagram and in Fig. 16.

NOTE: For wire runs up to 50 ft, use no. 18 AWG (Americ_m Wire Gage) insulated wire (35 C minimum). For 50 to 75 fl, use no. 16 AWG insulated wire (35 C minimum). For over 75 fl, use no. 14 AWG insulated wire (35 C minimum). All wire larger than no. 18 AWG cannot be directly connected at the thermostat and will requile a junction box and splice at the

thermostat.

Fig. 14- Field Gas Piping

.... I TBI

II FIELD [ r---I

L.......

Z_U_ SUPPLY , F_!

o=;-..........

I !

r I

LEGEND

EQUIP -- GND --

NEC -- TB --

NOTE: The maximum wire size for TB1 is 2/0.

Equipment Ground

National ElectricalCode

Terminal Board

Fig. 15- Field Power Wiring Connections

THERMOSTAT ASSEMBLY

I I I I I I I I

TB2- []

Jll 1 [_ [_ [_ _ [_ [] [_

2 3 4 5 6 7 8

Fig. 16- Field Control Thermostat Wiring

Set heat anticipator settings as follows:

VOLTAGE

All

STAGE 1 STAGE 1 AND 2

(Wl) ON (W1 AND W2) ON

0.15 0.30

Settings may be changed slightly to provide a greater degree

of comfort for a particular installation.

Step 10 -- Install Outdoor Air Hood -- Per-

fonn the following procedure to install the outdoor-_dr hood on units equipped with an economizer, two-position dmnpeL or manual outdoor air &+mper:

1. Remove blank panel from return end of unit (hood sec- tion). Save the screws. See Fig. 17 for shipping location of components.

2. Hood sides me fastened to sides of outdoor air opening. Remove the hood sides and save the screws (3 each side).

3. Remove the bracket holding the bottom half of the hood in the shipping position. Remove the hood bottom half and filters (or manual dampers on units so equipped)

from outdoor section. NOTE: On units without economizers, the components

are attached to the unit basepan. To access the compo- nents, remove the panel below the outdoor air intake

section.

4. Remove inner filter track from shipping position in out- door section. Position inner filter track so the track is fac-

ing outward from the unit. Install the tilter track with 4 screws provided.

EQUIP GND

5. Apply seal strip (provided) to back flange of both hood sides where hood side connects to the unit back panel.

See Fig. 18.

6. Apply seal strip (provided) to top flange of both hood sides where hood sides connect to the hood top panels.

See Fig. 18.

7. Install hood sides to the back panels using the screws from Step 2. The sloped flanges point outwtud. The drip

edges of the side panels should face outwmd as well. Attach the filter guides to the hood sides. The flanges of

the filter guides should face inwm'd to hold the filters in place. See Fig. 18.

8. Apply seal strip along the entire length of the bottom flange of the hood top. See Fig. 18.

9. Install the bottom pmt of the hood top using 4 screws pro- videdi See Fig. 18.

10. Remove the packaging from tilters (3) and install into the

filter tracks. Slide the filtel.'s to the sides then place the last filter into the center of the tilter track.

NOTE: For units with manu;d dampers, replace the end filters with the manual ck_mpers. Install the filter in the center

between the manual dampel.s.

11. Install the filter retainer track along the bottom edge of the outdoor air hood using 4 screws provided. See

Fig. 18.

12. Install top section of the outdoor air hood using 9 screws provided. See Fig. 18. See Fig. 19 for a pictme of the as-

sembled outdoor air hood.

NOTE: For filter remov_fl, remove the four screws holding the filter retainel: The filters can then be removed, cleaned, or

replaced. Install the filters by reversing the procedure. MANUAL DAMPER ASSEMBLY-- For units equipped

with manual dampers, the assembly process is similar to the outdoor air hood for units with economizers. There me two

slide dampers shipped with the unit to _fllow for manual setting of the outside air volume. When assembling the hood, place

one of the manual slide dampers in each of the end positions and the remaining filter in the center position. The manual

dampel.s can then be moved to the appropriate position and then locked into place using the screws mounted in the adjust-

ment slots. See Fig. 20.

HOOD HOOD TOP SIDE (BOTTOM HALF)

SECTION

HOOD TOP (TOP HALF)_

HOOD SIDE

Fig. 17 -- Outdoor-Air Hood Component

Shipping Location

Table 4A -- Electrical Data -- Units Without Convenience Outlet

NOMINAL VOLTAGE COMPRESSOR OFM IFM POWER

UNIT VOLTAGE RANGE NO. 1 NO. 2 NO. 3 EXHAUST

48HJ (3 Ph,

60Hz)

MIn Max RLA LRA RLA LRA RLA LRA Oty Hp iea} Hp FLA Qty Hp _L/_

208/230 187 253 16.7 130 16.7 130 22.4 184 4 0.25 1.5 5 16.7/15.2

020 460 414 506 9 70 9 70 10.7 90 4 0.25 0.7 5 7.6

575 518 633 7 55 7 55 9.3 73 4 0.25 0.7 5 6.1

208/230 187 253 22.4 184 22.4 184 22.4 184 4 0.25 1.5

024

460 414 506 10.7 90 10.7 90 10.7 90 4 0.25 0.7

575 518 633 9.3 73 9.3 73 9.3 73 4 0.25 0.7 7.5 9

208/230 187 253 47.1 245 47.1 245 6 0.25 1.5 7.5 24.2/22

028 460 414 506 19.6 125 19.6 125 6 0.25 0.7 7.5 11

575 518 633 15.8 100 15.8 100 6 0.25 0.7 7.5 9

See Legend and Notes on page 15.

FLA

3.7 10.6/ 9.6

7.5 24.2/22

3.7 4.8

7.5 11

3 3.9

7.5 9

3.7 10.6/ 9.6

5 16.7/15.2

7.5 24.2/22

10 30.8/28

3.7 4.8

5 7.6

7.5 11

10 14

5 6.1

10 11

5 16.7/15.2

10 30.8/28

5 7.6

10 14

5 6.1

10 11

2 1 5.9

2 1 3.1

2 1 2.4

2 1 5.9

2 1 3.1

2 1 2.4

2 1 5.9

2 1 3.1

2 1 2.4

COMBUSTION DISCONNECT

FAN MOTOR POWER SUPPLY SIZE

FLA MCA MOCP* FLA

7_ 77 10_ 90 8_ 82 9_ 89 10&100 9_ 96

0.5

0.3

0.24

0.5

0.3

0.24

0.5

0.3

0.24

6_ 83 10&100 9_ 89 9_ 94 10_100 10_102 9_ 89 10_100 99/ 96

104/101 12_110 112/110

39 45 42 45 50 49

42 50 45 48 50 52

45 50 49 51 60 56

32 40 35 37 45 40

35 40 37 39 45 43

37 45 40 42 50 46

6_ 88 10&100 9& 95

101/100 11_110 11_109

9_ 94 10_100 10_102

10_106 12_125 11_115 10_101 12_110 112/109

11_113 12_125 12&123 11_108 12_125 12_116

12_120 15_125 13_130

42 50 46 49 50 53 45 50 49

51 60 56 49 50 53

55 60 60 52 60 56

59 60 63 39 45 42

44 50 48 42 50 46

47 50 51 44 50 46

49 60 53

132/130 17_175 13_136 14_142 17_175 151/150

13_137 17_175 14_144 151/149 17_175 16_158

14_143 17_175 15_151 15_155 20_200 16_164

56 60 59 62 60 66 59 60 63

66 60 70 62 60 66

69 60 73 46 60 48

51 60 54 49 60 52

54 60 57 51 60 54

56 60 59

Table 4B -- Electrical Data -- Units With Optional Convenience Outlet

NOMINAL VOLTAGE

UNIT VOLTAGE RANGE

48HJ (3 Ph,

80 Hz) MIn Max RLA LRA RLA LRA RLA LRA Oty Hp Hp FLA O_ Hp {ea}

208/230 187 253 16.7 130 16.7 130 22.4 184 4 0.25 1.5 5 16.7/15.2

020 480 414 506 9 70 9 70 10.7 90 4 0.25 0.7 5 7.6

575 518 633 7 55 7 55 9.3 73 4 8.25 0.7 5 6.1

208/230 187 253 22.4 184 22.4 184 22.4 184 4 0.25 1.5

024 5 7.6

460 414 506 10.7 90 10.7 98 10.7 90 4 0.25 0.7

575 518 633 9.3 73 9.3 73 9.3 73 4 0.25 0.7 7.5 9

208/230 187 253 47.1 245 47.1 245 6 0.25 1.5 7.5 24.2/22

028 460 414 506 19.6 125 19.6 125 6 0.25 0.7 7.5 11

575 518 633 15.8 100 15.8 100 6 0.25 0.7 7.5 9

COMPRESSOR POWER

NO. 1 NO. 2 NO. 3 OFM IFM EXHAUST

_a_ FLA

3.7 10._ 9.6

7.5 24.2/22

3.7 4.8

7.5 11

3 3.9

7.5 9

3.7 10.6/ 9.6

5 16.7/15.2

7.5 24.2/22

10 30.8/28

3.7 4.8

7.5 11

10 14

5 6.1

10 11

5 16.7/15.2

10 30.8/28

5 7.6

10 14

5 6.1

10 11

COMBUSTION DISCONNECT

FAN MOTOR POWER SUPPLY SIZE

FLA MCA MOCP* FLA

2 1 5.9 95/ 94 100/100 103/101

2 1 5.9 101/ 99 110/100 110/108

2 1 5.9 109/106 125/125 118/116

2 1 3.1 48 50 52

2 1 3.1 51 60 56

2 1 3.1 54 60 59

2 1 2.4 40 45 43

2 1 2.4 42 50 46

2 1 2.4 45 50 49

2 1 5.9 106/105 125/125 116/115

2 1 5.9 112/111 125/125 123/121

2 1 5.9 128/118 125/125 131/129

2 1 5.9 129/125 150/150 139/136

2 1 3.1 52 60 56

2 1 3.1 54 60 59

2 1 3.1 58 60 63

2 1 3.1 62 70 67

2 1 2.4 47 50 51

2 1 2.4 50 50 55

2 1 2.4 52 60 57

2 1 5.9 148/147 175/175 157/155

2 1 5.9 156/154 208G00 166/163

2 1 5.9 163/160 200G00 173/170

2 1 3.1 65 80 69

2 1 3.1 69 80 73

2 1 3.1 72 90 77

2 1 2.4 54 60 57

2 1 2.4 57 60 60

2 1 2.4 59 60 63

0.5

0.3

0.24

0.5

0.3

0.24

0.5

0.3

0.24

83/ 82 108/100 89/ 88

89/ 88 100/100 96/ 94

97/ 94 108/100 105/102

42 50 45

45 50 48

48 50 52

35 40 38

38 45 40

40 45 44

94/ 93 108/100 102/101

101/ 99 110/100 109/107

108/106 125/125 118/115

117/113 125/125 125/122

45 50 49

48 50 52

52 60 56

55 60 60

42 50 46

45 50 49

47 50 51

137/135 175/175 144/142

144/142 175/175 152/150

151/148 175/175 160/157

59 60 62

62 80 66

65 80 69

49 60 52

52 60 55

54 60 57

LEGEND AND NOTES FOR TABLES 4A AND 4B

LEGEND

FLA -- Full Load Amps HACR -- Heating, Air Conditioning and Refrigeration IFM -- Indoor (Evaporator) Fan Motor LRA -- Locked Rotor Amps MCA -- Minimum Circuit Amps

MOCP -- Maximum Overcurrent Protection OFM -- Outdoor (Condenser) Fan Motor

RLA -- Rated Load Amps

*Fuse or HACR circuit breaker.

NOTES:

1. In compliance with NEC (National Electric Code) 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.

2. Unbalanced 3-Phase Supply Voltage

Never operate a motor where a phase imbalance in supply volt- age is greater than 2%. Use the following formula to determine

the percent voltage imbalance.

% Voltage Imbalance = 100 x max voltage deviation from average voltage

average voltage

EXAMPLE: Supply voltage is 460-3-60.

A B C AB = 452 v

AC = 456 v Average Voltage= 452 + 464 + 456

(_ BC = 464 v

1371

= 457

Determine maximum deviation from average voltage.

(AB) 467 - 462 = 5 v (BC) 464 - 457 = 7 v (AC) 457 - 456 = 2 v

Maximum deviation is 7 v. Determine percent voltage imbalance.

% Voltage Imbalance = 100 x 45"_-

= 1.53%

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

more than 2%, contact your local electric utility company

I IMPORTANT: If the supply voltage phase imbalance is I

immediately.

3. The convenience outlet full load amps (FLA) are 5, 3, and 3 for 208/230,460, 575-V units, respectively.

TOP HOOD SECTION

SEAL STRIP

HOOD

SECTION

FILTER RETAINER

MANUAL DAMPER

(IF EQUIPPED)

NOTE: Units with manual damper only use one filter.

Fig. 18 -- Outdoor-Air Hood Details

GUIDE

HOOD STRIP SIDE

FILTER

ADD SEAL

ADD SEAL STRIP

INNER FINER TRACK

HOOD

SIDE

ADD SEAL STRIP

UNIT BACK

PANEL

ADD SEAL STRIP

/4.

Fig. 19- Outdoor-Air Hood Assembled

MOVEABLEDAMPER/ \

AIR FILTER POSITION MOVEABLE DAMPER

Fig. 20- Manual Damper Details

Step 11 -- Position Optional Power Exhaust or Barometric Relief Damper Hood -- The optiomfl

power exhaust or barolnetric relief dampel_ are shipped assembled and tilted back into the unit for shipping. Brackets and extra screws ale shipped in shrink wrap around the dmnpers.

1. Remove 9 screws holding each &tmper assembly in place. See Fig. 21. Each dmnper assembly is secured with 3 screws on each side and 3 screws along the bottom.

Save screws.

2. Pivot the damper assembly outward until top edge of the

damper assembly rests against file inside w_dl of unit.

3. Secure each damper assembly to unit with 6 screws across top (3 screws provided) and bottom (3 screws from Step 1) of dampel:

4. With screws saved from Step 1, install brackets on each side of &tmper assembly. See Fig. 22.

5. Remove tape from damper blades.

Step 12 -- Non-Fused Disconnect -- The handle

for the factory-installed non-fused disconnect is shipped inside the unit to prevent the handle from &image during shipping. Follow these steps to complete inst_dlation of the handle.

Be sure power is shut off to the unit from the building power supply. Electrical shock could cause serious per-

somd injury.

1. Open the control box access dool:

2. Remove the small cover plate located on the unit corner post near the control section.

3. Remove the inner control box cover. The handle and shall are located in a plastic bag at the bottom of the control

box.

4. Insert the square shall into the disconnect with the pins vertical. On the 100-amp disconnect, the shall is keyed

into the disconnect and can only be installed one way (with the pins vertical).

5. Insert the handle through the corner post and onto the shall with the handle positioned so that "OFF' is on top.

6. Rotate the handle to the "ON" position to lock the pins into the handle.

7. From the inside of the corner post, attach the handle mounting screws to the handle. Slide the shall fully into

the handle and tighten the set screw(s) on the disconnect to lock the shall. Tighten the screws that attach the handle to the corner post.

8. Rotate the handle back to the "OFF" position.

9. Replace _fll panels and doors. Power can now be turned back on to the unit.

Step 13 --Install All Accessories--After all of

the factory-installed options have been adjusted, install all field-installed accessories. Refer to the accessory installation instructions included with each accessory. Consult the CaMer Price Pages for accessory package numbers for particular applications.

Use care when tilting blower assembly. Hoods and blowers are heavy and can cause injury if dropped.

REMOVE SCREWS_

REMOVE SCREWS

Fig. 21 -- Power Exhaust or Barometric Relief Damper Mounting Details

®_

,REMOVE

SCREWS

Fig. 22 -- Bracket and Hood Positioning

PRE-START-UP

F;filure to observe the following warnings could result in serious personal injury.

1. Follow recognized safety practices and we;u protective goggles when checking or the 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 _ue disconnected.

4. Relieve all pressure from file system before touching or disturbing anything inside the compressor terminal box if refrigerant leak is suspected around the compressor

terminals.

5. Never attempt to repair a soldered connection while the refrigerant system is under pressure.

6. Do not use torch to remove any component. The sys- tem contains oil and refrigerant under pressure. To remove a component, wear protective goggles and pro-

ceed as follows: a. Shut off gas and then electrical power to the unit.

Install lockout tag.

b. Relieve all pressure from the system using both

high-pressure and low-pressure ports.

c. Cut the component connection tubing with a tubing

cuttek and remove the component from the unit.

d. Carefully unsweat the remaining tubing stubs when

necessary. Oil can ignite when exposed to torch flalne.

START-UP

Use the following inforlnation and Start-Up Checklist on

page CL-I to check out unit PRIOR to start-up.

Unit Preparation -- Check that unit l'msbeen installed in

accordance with these installation instructions and all applica- ble codes.

Compressor Mounting- Compressorsare internally

spring mounted. Do not loosen or remove compressor hold- down bolts.

Refrigerant Service Ports-- Each independent re-

frigerant system has a total of 3 Schmder-type service gage

ports per circuit. One port is located on the suction line, one on the compressor dischmge line, and one on the liquid line. Be

sure that caps on the ports are tight.

Crankcase Heater(s)- Crankcase heaters are ener-

gized as long as there is power to the unit and the compressor is not operating.

IMPORTANT: Unit power must be on for 24 hom.'sprior to start-up. Otherwise, damage to compressor may

result.

Compressor Phasing

hnproper wiring will cause compressor stoppage and may cause equipment damage. Correct wiring by switching

leads as indicated below.

Proceed as follows to inspect and prepare the unit for initial

st_ut-up:

1. Remove all access panels.

2. Read and follow instructions on all WARNING CAU-

TION, and INFORMATION labels attached to, or shipped with, the unit.

3. Make the following inspections:

a. Inspect for shipping and handling damages such as

broken lines, loose parts, or disconnected wires, etc.

b. Inspect for oil at all refrigerant tubing connections

and on unit base. Detecting oil generally indicates a refrigerant leak. Leak-test all refiigemnt tubing con- nections using an electronic leak detectok halide torch, or liquid-soap solution.

c. Inspect all tield-wiring and factou-wiring connec-

tions. Be sure that connections are completed and tight.

d. Inspect coil fins. If damaged during shipping and

handling, carefully straighten the fins with a tin comb.

4. Verify the following conditions:

a. Make sure that condenser fan blade is correctly

positioned in the fan orifice. See Condenser-Fan

Adjustment section on page 47 for more details. b. Make sure that air filter(s) is in place. c. Make sure that condensate drain trap is filled with

water to ensure proper di'ainage. d. Make sure that all tools and miscellaneous loose parts

have been removed.

On 3-phase units, it is important to be certain the compres-

sors are rotating in the proper direction. To determine whether or not compressors are rotating in the proper direction, use a

phase-rotation meter on the unit input power to check for L I-L2-L3 or clockwise rotation. If the compressor is rotating in

the wrong direction, the suction pressure will not diop and the discharge pressure will not rise.

NOTE: Indoor or outdoor fan rotation direction may not indicate proper input power phase sequence, as some 3-phase

units use single-phase fan motors. Check fan rotation where applicable.

To correct the wrong compressor rotation direction, perform

the following procedure:

1. Turn offpower to the unit and lock out the power.

2. Switch any two of the incoming unit power leads.

3. Turn on power to the unit.

4. Verify corrected compressor rotation and fan rotation where applicable.

Internal Wiring- Check all electrical connections in

unit control boxes; tighten as required.

Evaporator Fan- Fan belt and v_uiable pulleys are

factory-installed. See Tables 5-23 for fan performance data. Be sure that fans rotate in the proper direction. See Table 24 for air quantity limits. See Table 25 for evaporator fan motor specifications. See Table 26 for accessory or factory-installed options static pressure. See Table 27 for fan rpm at various motor pulley settings. To alter fan performance, see Evaporator Fan Performance Adjustment section on page 47.

Condenser Fans and Motors -- Condenser fans and

motols ;ue factory set. Refer to Condensel;Fan Adjustment section (page 47) as required.

Return-Air Filters- Check that correct flters are in-

stalled in filter tracks (see Table 1). Do not operate unit without return-air filters.

NOTE: For units with 4-in. filter option, units ale shipped with standard 2-in. filtel_. To inst_fll 4-in. filters, tile filter spacers

must be removed.

Outdoor-Air Inlet Screens -- Outdoor-air inlet screens

must be in place before operating unit. Gas Heat -- Verify gas pressures before turning on heat as

follows:

1. Turn off field-supplied manual gas stop, located external to unit.

Table 5 -- Fan Performance -- 48HJD020 Vertical Discharge Units*

AIRFLOW

(Cfm)

3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 8500

0.2 0.4 0.6 0.8 1.0

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

460 591 0.68 548 774 0.89 623 951 1.09 692 1126 1.29 755 1301 1.50 499 774 0.89 581 976 1.12 653 1170 1.35 717 1361 1.56 777 1551 1.78

538 990 1.14 617 1212 1.39 685 1423 1.64 746 1630 1.88 803 1835 2.11 579 1243 1.43 654 1485 1.71 719 1715 1.97 778 1938 2.23 832 2158 2.48

621 1536 1.77 693 1798 2.07 755 2045 2.35 811 2285 2.63 864 2520 2.90 664 1871 2.15 732 2152 2.48 792 2417 2.78 846 2673 3.07 897 2925 3.36 707 2250 2.59 772 2550 2.93 830 2834 3.26 883 3106 3.57 932 3373 3.88 751 2676 3.08 813 2994 3.44 869 3295 3.79 920 3585 4.12 967 3868 4.45 795 3150 3.62 855 3487 4.01 909 3805 4.38 958 4112 4.73 1004 4411 5.07 839 3676 4.23 897 4029 4.63 949 4366 5.02 997 4689 5.39 1042 5004 5.75 884 4253 4.89 940 4625 5.32 990 4978 5.73 1037 5318 6.12 1080 5649 6.50

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

2. Connect pressure gage to supply gas tap, located on field-

supplied manual shutoff valve (see Fig. 14).

3. Connect pressure gage to manifold pressure tap.

4. Turn on feld-supplied manual gas stop. Provide a call for heating stage 1.

5. After the unit has run for several minutes, verify tile supply gas pressure is between 5.5 in. wg and 13.0 in. wg. Provide a call for heating stage 2. Check manifold pres- sure after 5 minutes of stage 2 operation. Manifold pressure should be 3.00 in. wg. If manifold pressure must

be adjusted, refer to Gas Valve Adjustment section. NOTE: Supply gas pressure must not exceed 13.0 in. wg.

6. Turn off unit.

7. Remove c_dl for heat.

AIRFLOW

(Cfm)

3500 4000 4500 5000 5500 6000 6500 7000 7500 8000 8500

Bhp -- Brake Horsepower Input to Fan Watts -- Input Watts to Motor

*Motor drive ranges:

Low Range: Not Used Mid-Low Range: 647-886 (208/230 and 460-v), 810-1072 (575-v)

Mid-High Range: 897-1139 (208/230 and 460-v), 873-1108 (575-v) High Range: 1078-1274

All other rpms require field-supplied drive.

Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp Rpm Watts Bhp

814 1476 1.70 871 1650 1.90 924 1825 2.10 975 1999 2.30 1023 2173 2.50 834 1740 2.00 888 1930 2.22 939 2119 2.44 988 2308 2.65 1035 2497 2.87 857 2039 2.35 909 2243 2.58 958 2446 2.81 1005 2650 3.05 1051 2853 3.28 884 2376 2.73 933 2594 2.98 980 2811 3.23 1026 3028 3.48 1070 3244 3.73 913 2753 3.17 960 2984 3.43 1006 3215 3.70 1049 3445 3.96 1092 3674 4.23 945 3172 3.65 990 3417 3.93 1034 3662 4.21 1076 3905 4.49 1117 4147 4.77

978 3636 4.18 1022 3895 4.48 1064 4153 4.78 1104 4409 5.07 1144 4665 5.37 1012 4145 4.77 1055 4419 5.08 1095 4691 5.39 1135 4960 5.70 1173 5229 6.01 1047 4703 5.41 1089 4992 5.74 1128 5277 6.07 1167 5561 6.40 1204 5842 6.72 1084 5311 6.11 1124 5615 6.46 1163 5915 6.80 1200 6211 7.14 1236 6506 7.48 1121 5972 6.87 1160 6290 7.23 1198 6604 7.60 1234 6914 7.95 1269 7223 8.31

1.2 1.4 1.6 1.8 2.0

LEGEND Refer to page 27 for general Fan Performance Data notes.

AVAILABLE EXTERNAL STATIC PRESSURE (in. wg)

NOTE: Maximum continuous bhp is:

Low Range: Not Used Mid-Low Range: 4.25 (208/230 and 460-v), 3.45 (575-v)

Mid-High Range: 5.75 High Range: 8.63

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