CARRIER Package Units(both Units Combined) Manual L0811828

User Manual: CARRIER CARRIER Package Units(both units combined) Manual CARRIER Package Units(both units combined) Owner's Manual, CARRIER Package Units(both units combined) installation guides

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Page Count: 36

WEATHERMAKER ®

48A2,A3,A4,A5020-060

Single Package Gas Heating/Electric Cooling

Rooftop Units with COMFORTLINK TMControls

and PURON ®(R-410A) Refrigerant

Installation Instructions

CONTENTS

Page

SAFETY CONSIDERATIONS ...................... 1

INSTALLATION ................................ 1-35

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

•ROOF CURB

• ALTERNATE UNIT SUPPORT

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

• POSITIONING

• ROOF MOUNT

Step 3 -- Field Fabricate Ductwork ............... 2

Step 4 -- Make Unit Duct Connections ........... 2

Step 5 -- Install Flue Hood ...................... 17

Step 6 -- Trap Condensate Drain ................ 17

Step 7 -- Install Gas Piping ..................... 17

Step 8 -- Make Electrical Connections .......... 18

• POWER WIRING

• FIELD POWER SUPPLY

• FIELD CONTROL WIRING

Step 9 -- Make Outdoor-Air Inlet

Adjustments .................................. 30

• ECONOMIZER AND FIXED OUTDOOR

AIR DAMPER

Step 10 -- Position Power Exhaust/Barometric

Relief Damper Hood ........................... 30

Step 11 -- Route VAV Static Pressure Sensor... 30

Step 12 --Install All Accessories ............... 32

Step 13 -- Field Modifications ................... 34

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can

be hazardous due to system pressure and electrical compo-

nents. Only trained and qualified service personnel should in-

stall, 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 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 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.

1. Improper installation, adjustment, alteration, service,

or maintenance can cause property damage, personal

injury, or loss of life. Refer to the User's Information

Manual provided with this unit for more details.

2. Do not store or use gasoline or other flalmnable va-

pors 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, call the fire

department.

Disconnect gas piping from unit when pressure testing at

pressure greater than 0.5 psig. Pressures 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 pressure

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 valve(s).

Puron (R-410A) refrigerant systems operate at higher pres-

sures than standard R-22 systems. Do not use R-22 service

equipment or components on Puron refrigerant equipment.

If service equipment is not rated for Puron refrigerant,

equipment damage or personal injury may result.

INSTALLATION

Step 1-- Provide Unit Support

1. All panels must be in place when rigging or damage

to unit may occur.

2. Unit is not designed for handling by fork truck. Dam-

age to unit may occur.

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

Catalog No. 04%3480051-01 Printed in U.S.A. Form 48A-6SI Pg 1 5-08 Replaces: 48A-4SI

ROOF CURB -- For vertical discharge units, assemble or in-

stall accessory roof curb in accordance with instructions

shipped with this accessory. See Fig. 1-3. Install insulation,

cant strips, roofing, and counter flashing as shown. Ductwork

can be installed to roof curb before unit is set in place. Curb

should be level. This is necessary to permit unit drain to func-

tion properly. Unit leveling tolerance is shown in Fig. 1-3.

Refer to Accessory Roof Curb Installation Instructions for

additional reformation as required. When accessory roof curb

is used, unit may be installed on class A, B, or C roof covering

material.

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. 1-3. Improperly applied gasket can

also result in air leaks and poor unit performance.

ALTERNATE UNIT SUPPORT -- When the preferred curb

or slab mount cannot be used, support unit with sleepers on pe-

rimeter, using unit curb support area. If sleepers cannot be

used, support long sides of unit (refer to Fig. 4-10) with a mini-

mum number of 4-in. x 4-in. pads spaced as follows:

48A2,A3,A4,A5020-035 units require 3 pads on each side;

48A2,A3,A4,A5040-050 units require 4 pads on each side;

48A2,A3,A4,A5060 units require 6 pads on each side. Unit

may sag if supported by corners only.

Step 2 -- Rig and Place Unit -- Inspect unit for

transportation damage. See Tables 1-6 for physical data and

specifications. File any claim with transportation agency.

Do not drop unit; keep upright. Use spreader bars over unit

to prevent sling or cable damage. This unit must be handled

with a crane and can not be handled by a fork truck. Level by

using unit frame as a reference; leveling tolerance is shown in

Fig. 1-3. See Fig. 11 for additional information. Unit operating

weight is shown in Table 2.

NOTE: On retrofit jobs, ductwork may be attached to the old

unit instead of a roof curb. Be careful not to damage ductwork

when removing old unit. Attach existing ductwork to roof curb

instead of unit.

Four lifting lugs are provided on the unit base rails as shown

in Fig. 4-10. Refer to rigging instructions on unit.

POSITIONING -- Maintain clearance, per Fig. 4-10, around

and above unit to provide minimum distance from combustible

materials, proper airflow, and service access.

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

air inlets near exhaust vents or other sources of contaminated

air. For proper unit operation, adequate combustion and venti-

lation air must be provided in accordance with Section 5.3 (Air

for Combustion and Ventilation) of the National Fuel Gas

Code, ANSI Z223.1 (American National Standards Institute).

Although unit is weatherproof, guard against water from

higher level runoff and overhangs.

Locate mechanical draft 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.

When unit is located adjacent to public walkways, flue assem-

bly must be at least 7 ft above grade.

ROOF MOUNT -- Check building codes for weight distribu-

tion requirements. See Fig. 11. Unit operating weight is shown

in Table 2.

Step 3 -- Field Fabricate Ductwork -- Secure all

ducts to building structure. Use flexible duct connectors be-

tween 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.

NOTE: Due to width of the horizontal supply and return duct-

work, provisions should be made for servicing of the outdoor

air filters (i.e., catwalk over ductwork).

Ducts passing through an unconditioned space must be in-

sulated and covered with a vapor barrier. Outlet grilles must not

lie directly below unit discharge. The return duct must have a

90-degree elbow before opening into the building space if the

unit is equipped with power exhaust.

To attach ductwork to roof curb, insert duct approximately

10 to 11 in. up into roof curb. Connect ductwork to 14-gage

roof curb material with sheet metal screws driven from reside

the duct.

Follow AMCA (Air Movement and Control Association)

guidelines relating to ductwork connections to the unit. These

guidelines recolrunend a minflnum 21/2 equivalent duct diame-

ters of straight duct connected to supply air inlet and outlet

openings before any transitions, fittings, dampers, etc. Failure

to adhere to these guidelines may result in system effects which

can impact the unit's ability to achieve published performance.

For vertical supply and return units, tools or parts could

drop into ductwork and cause an injury. Install a 90-degree

elbow turn in the supply and return ductwork between the

unit and the conditioned space. Ifa 90-degree elbow cannot

be installed, then a grille of sufficient strength and density

should be installed to prevent objects from falling into the

conditioned space.

Step 4 -- Make Unit Duct Connections

48A2 AND A3 UNITS -- Unit is shipped for through-the-

bottom duct connections. Field-fabricated ductwork should be

attached to the roof curb. Supply and return duct dflnensions

are shown in Fig. 4-6. Air distribution is shown in Fig. 12.

Refer to installation instructions shipped with roof curb for

more reformation.

48A4 AND A5 UNITS -- Remove shipping covers from

supply and return air openings. Attach field-supplied ductwork

to unit. Connect to the unit with a single duct for all supply

openings and with a single duct for all return openings.

Splitting of the airflow into branch ducts should not be done at

the unit. Sufficient duct length should be used prior to branch-

ing to ensure the air temperatures are well mixed within the

ductwork. See Fig. 7-9 for duct opening dimensions. Secure all

ducts to building structure. Air distribution is shown in Fig. 7-9

and Fig. 13.

Install accessory barometric relief or power exhaust in the

field-fabricated return ductwork. Refer to Step 10 -- Position

Power Exhaust/Barometric Relief Damper Hood section on

page 30 for more information.

Instructions continued on page 17.

NOTES:

1, Unless otherwise specified, all dimensions are to outside of part.

2. Roof curb accessory CRRFCURBOO5AOO is shipped disassembled.

3. All roof curb parts are to be 14 ga. galvanized steel,

4. Dimensions in [] are in millimeters. All other dimensions are in inches.

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Fig. 1 -- Roof Curb -- 48A2,A3020-035 Units

NOTES:

1. Unless otherwise specified, all dimensions are to outside of part.

2. Roof curb accessory CRRFCURBOOGAO0 is shipped disassembled.

3. All roof curb parts are to be 14 ga. galvanized steel.

4. Dimensions in [] are in millimeters. All other dimensions are in inches.

NOTE:

TO PREVENT STANDING WATER IN THE DRAIN PAN OF THE

INDOOR SECTION, AND THE HEAT EXCHANGERS

UNIT CAN ONLY BE PITCHED AS SHOWN,

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DEG. IN mm DEG IN mm

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LEVELING TOLERANCES

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[44]

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DETAIL

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RIGID INSULATIO

(FIELD SUPPLIED)

Fig. 2 -- Roof Curb -- 48A2,A3040-050 Units

NOTES:

1. Unless otherwise specified, all dimensions are to outside of part.

2. Roof curb accessory CRRFCURBO14AO0 is shipped disassembled.

3. All roof curb parts are to be 14 ga. galvanized steel.

4. Dimensions in [] are in millimeters. All other dimensions are in inches.

Bl-I/4

[2064]

NOTE:

TO PREVENT STANDING WATER IN THE DRAIN PAN OF THE

iNDOOR SECTION, AND THE HEAT EXCHANGERS

UNIT CAN ONLY BE PITCHED AS SHOWN.

43-1/16

[1094]

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[610]

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DIMENS IONS

(DEGREES ARD INCHES)

A R

DEG I N. mm BEG I N. mm

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UNIT LEVELING TOLERANCES

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Fig. 3 -- Roof Curb -- 48A2,A3060 Units

o',

NOTES:

1. Weights include economizer.

2. _ center of gravit}L

3. Unit clearances:

Top of units: no overhang

Condenser coil: 4' - 0" [1219]

Economizer side: 6' - 0" [1829]

Heat side: 4' - 0" [1219]

Filter access side: 10' - 0" [3048] (for

removal of evaporator coil)

4. For smaller service and operational clear-

ances, contact Carrier application engineer-

ing department.

5. Bottom ducts are designed to be attached to

accessory roof curb. If unit is mounted on

dunnage, it is recommended that the ducts

be supported by cross braces as done on

accessory roof curb.

6. Dimensions in [] are in millimeters. All other

dimensions are in inches.

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Fig. 4 -- Base Unit Dimensions -- 48A2,A3020-035

--4

NOTES:

1, Weights include economizer,

2. _ center of gravity.

3, Unit clearances:

Top of units: no overhang

Condenser coil: 4' - 0" [1219]

Economizer side: 6' - 0" [1829]

Heat side: 4'- 0" [1219]

Filter access side: 10' - 0" [3048] (for

removal of evaporator coil)

4. For smaller service and operational clearances,

contact Carrier application engineering depart-

ment,

5. Bottom ducts are designed to be attached to ac-

cessory roof curb. If unit is mounted on dunnage,

it is recommended that the ducts be supported by

cross braces as done on accessory roof curb.

6. Dimensions in [ ] are in millimeters. All other di-

mensions are in inches.

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variable frequency drive (variable air volume units).

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FOR CENTERS OF GRAVITY,

OPERATING AND CORNER

WEIGHTS, SEE FIG. 10

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NOTES:

1• Weights include economizer.

2. @ center of gravity.

3• Unit clearances:

Top of units: no overhang

Condenser coil: 4' - 0" [1219]

Economizer side: 6' - 0" [1829]

Heat side: 4'- 0" [1219]

Filter access side: 10' - 0" [3048] (for

removal of evaporator coil)

4. For smaller service and operational clearances,

contact Carrier application engineering depart-

ment,

5. Dimensions in [ ] are in millimeters. All other

dimensions are in inches.

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Fig. 7-- Base Unit Dimensions -- 48A4,A5020-035

S

NOTES:

1. Weights include economizer.

2. @ center of gravity.

3. Unit clearances:

Top of units: no overhang

Condenser coil: 4' - O" [1219]

Economizer side: 6' - O" [1829]

Heat side: 4' - O" [1219]

Filter access side: 10' - O" [3048] (for removal of

evaporator coil)

4. For smaller service and operational clearances, contact

Carrier application engineering department,

5. Dimensions in [ ] are in millimeters. All other dimensions

are in inches. Ti6s] i T

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*Operating weight includes largest indoor fan motor, microchannel heat

exchanger, modulating _ower exhaust (variable air volume units), and variable

frequency drive (variable air volume units).

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Fig. 8 -- Base Unit Dimensions -- 48A4,A5040-050

I

$

FOR CENTERS OF GRAVITY

OPERATING AND CORNER

WEIGHTS, SEE FIG. 10

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Fig. 9 -- Base Unit Dimensions -- 48A4,A5060

NOTES:

1. Weights include economizer or outdoor air damper.

2. _ center of gravity.

3. Unit clearances:

Top of units: no overhang

Condenser coil: 4'- 0" [1219]

Economizer side: 6' - 0" [1829]

Heat side: 4' - 0" [1219]

Filter access side: 10' - 0" [3048] (for removal of evaporator

coil)

4. For smaller service and operational clearances, contact Carrier

application engineering department.

5. Bottom ducts are designed to be attached to accessory roof curb.

If unit is mounted on dunnage, it is recommended that the ducts

be supported by cross braces as done on accessory roof curb.

6. Base unit weights include outdoor air hoods and filters (indoor fan

motor is not included). Add indoor fan motor, FlOPs, and acces-

sories for total operating weight.

7. VAV motor weights include indoor motor, VFD, VFD transducer,

and associated wiring•

8. Dimensions in [] are in millimeters. All other dimensions are in

inches.

9. For side-supply/return applications, a single return and supply

ductwork connection is recommended for covering all three re-

turn and all three supply openings. The entire area around the

duct openings is available for a 1.5" duct flange attachment.

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48/\2D A3D '36(; 3205

• i

48i28/A!@ 3,36 33 4)

48S4D,At, D 7106 3223}

48/\4E i,5E '356 333

OslZONS SCCESSOTZES (SEE NOT£ 6 )

B;,ROl,[ R C RE EF 4<" sO '

x " i

i\0"1 NOD *C",[R E, AdbTI 67_ 306) i

MO[} 30 li'C [ EXI{AUST i il 2 5 5_ g )

i

• J

2t 1',4 COl, i} CO£L _6

UNIT SIZE

48A2,A3 (D, M, S) 060

48A2,A3 (E, N, T) 060

48A4,A5 (D, M, S) 060

48A4,A5 (E, N, T) 060

OPERATING

WEIGHT*

(Ib)

8386

8626

8426

8676

CENTER OF GRAVITY

(ft - in.)

A B

14- 9 5/8 3- 5 1/4

14-23/8 3-31/4

14-15/8 3-91/4

13-71/4 3-71/4

CORNER WEIGHTS (Ib)

1 2 3 4

1909 1693 2243 2541

2159 1745 2100 2622

1763 2072 2259 2333

2000 2126 2134 2417

UNIT SIZE

48A2,A3 (D, M, S) 060

48A2,A3 (E, N, T) 060

48A4,A5 (D, M, S) 060

48A4,A5 (E, N, T) 060

OPERATING

WEIGHT*

(kg)

3804

3913

3822

3936

CENTER OF GRAVITY

(ram)

A B

4514 1048

4329 997

4310 1150

4146 1099

CORNER WEIGHTS

(kg)

1 2 3 4

866 768 1017 1153

979 792 953 1189

800 940 1024 1058

907 964 968 1096

*Operating weight includes largest indoor fan motor, microchannel heat exchanger, modulating

power exhaust (variable air volume units), and variable frequency drive (variable air volume

units).

Co

CV MQfOR WEZGHTS VAV MOfOR WEZGHFS

LBS (KQ) LBS (_a)(SEE NO E 7)

,_Eou i_F<i:uIuM...........;:iii_i:i........ .....

EFF(]'? {F#,l rPrC'" [7M EFFC'?Irr,l i _TF{:'_'m771

25 HP 230i460 240 (i09 309 /sO) 3ib (170) 444 (20i)

(/8 6_ K_,;' 575 . 240 (i09 ,5i9 /45) 375 (1;"0) j 454 (206) •

30 HP 233=_60 28_ (28) 35J lol, 418 (190) j ,190 (222) i

......................................................................... ' ..................... i

(22 55 Kw) 57t 283 (28) 359 163) 4/8 (190) £94 (224) i

40 HP 230/460 3i2 (69) 4i5 1881 o07 (230) 5tO (249) i

(29 84 Kw) 575 3/2 (169) 410 /86) 507 (P30) 545 (247) i

2

L

1r

A

@

i

i

i

i

i

i

i

i

i

i

i.

i

i

i

i

i

i

i

i

i

i

0i:!I#i 'Of 1441

T

0,!tl " 07414

3

Fig. 10 -- Center of Gravity and Weights -- 48A2,A3,A4,A5060

Table1-- Physical Data -- 48A2,A3,A4,A5 Units

UNIT 48A2,A3,A4,A5

NOMINAL CAPACITY (tons)

BASE UNIT

OPERATING WEIGHT (Ib)

COMPRESSOR

Quantity ... Type (Ckt l/Ckt 2)

Number of Refrigerant Circuits

Oil

REFRIGERANT TYPE

Operating Charge (Ib-oz)

Circuit 1

Circuit 2

MCHX CONDENSER*

Quantity

Total Face Area (sq ft)

CONDENSER FAN

Nominal Cfm

Quantity... Diameter (in.)

Motor Hp

EVAPORATOR COIL

Tube Size (in.)

Rows ... Fins/in.

Total Face Area (sq ft)

EVAPORATOR FAN

Quantity ... Size (in.)

Type Drive

Nominal Cfm

Motor Hp

Motor Frame Size

Motor Bearing Type

Maximum Allowable Rpm

Motor Pulley Pitch Diameter

Nominal Motor Shaft Diameter (in.)

Fan Pulley Pitch Diameter (in.)

Nominal Fan Shaft Diameter (in.)

Belt Quantity

Belt Type

Belt Length (in.)

Pulley Center Line Distance (in.)

Factory Speed Setting (rpm)

FURNACE SECTION

Supply Line Pressure Range

Rollout Switch Cutout

Temp (F)t

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

Natural Gas Std

Liquid Propane AIt

Thermostat Heat Anticipator Setting

Stage 1 (amps)

Stage 2 (amps)

Gas Input (Btuh) Stage 1

(Low Heat/High Heat)

Stage 2

(Low Heat/High Heat)

Efficiency (Steady State) (%)

Temperature Rise Range

(Low Heat/High Heat)

Manifold Pressure (in, wg)

Natural Gas Std

Liquid Propane AIt

Gas Valve Quantity

HIGH-PRESSURE SWITCH (psig)

Cutout

Reset (Auto.)

MIXED-AIR FILTERS

Quantity ... Size (in,) Standard

Pleated

5

184T

4.8

1

BX56

56

16.0-18.7

717

020DIE20 I 025DIE25 I 027DIE27 I030DIE30

See Unit Weights Table

I

2ZP67/1 ZP90 2 _ ZP90/1 .ZP90 I 2 ZP90/1 ZP90 2ZP72, 2..ZP72

2 2 I 2 2

Precharged Precharged Precharged Precharged

R-410A

14-14 I 20-6 I 20-6 I 15-2

11-13 12-13 12-13 15-5

1 I 1 I 1 I t

32.9 32.9 32.9 32.9

Propeller Type

19,500 I 19,500 I 19,500 I 19,500

2 30 2 30 9 30 9 .. 30

1 1 1 1

Cross-Hatched Copper Tubes, Aluminum Plate Fins with Intertwined Circuits

" I " I " I "

3...15 4...14 4...15 4. 15

31.7 31.7 31.7 31.7

Centrifugal Type

2...20X 15

Belt

8,000

10 I 15215T 254T

Ball

1200

4.4 I 5.7

13/8 15/8

8.6 9.1

115/16

BXSO 5VX530

63 53

15.6-18.4 15.0-17.9

924 1096

225

.111 ...34

.089 ... 43

0.1

0.1

262,500/394,000

350,000/525000

81

15-45/35-65

3.5

3.5

2

4.8

1

BX56

56

15.6-18.4

717

2...20X 15

Belt

10,000

10

215T

Ball

1200

6.1

115/16

1

5VX570

57

15.6-18.4

962

15

254T

5.5

D

2

5VX530

53

150-17.9

1106

2..20X15

Belt

11,000

10 15 20

215T 254T 256T

Ball

1200

4.4 49 59

13/8 15/8 15_

9.4 8.1 .

115/16

2 2 I 2

BXSO 5VX500 I 5VX530

50 50 53

15.6-18.4 15.0-17.9 15.0-17.9

848 1059 1187

5.0-in wg min/13 5-in. wg max.

225

111 _.34

069 _ 43

01

01

262,500/394,000

350,000/525,000

81

15-45/35-65

225

.111 ...34

.089 ... 43

0.1

0.1

262,500/394,000

350000/525000

81

15-45/35-65

3.5

3.5

2

3.5

3.5

2

2...20X 15

Belt

12,000

10 15

215T 254T

Ball

1200

4.4 5.7

1s/8 1s/s

9.0 9.1

115/16

2 2

BX50 5VX530

50 53

15.6-18.4 15.0-17.9

856 1096

225

.111 ...34

.089 ... 43

0.1

0.1

262,500/394,000

350,000/525,000

81

15-45/35-65

3.5

3.5

2

650 650 650 650

500 500 500 500

10...20 x24 x2 10 ... 20 x24x2 10...20 x24 x2 10...20x24 x2

5...20 x20 x4 5... 20 x20x4 5...20 x20 x4 6...20x20 x4

5...20 x24 x4 5...20x24x4 5...20 x24 x4 6...20x24 x4

OUTDOOR-AIR FILTERS 8 .16x25x2

Quantity...Size (in.) 4...20 x 25 x 2

POWER EXHAUST Direct Drive, Single-Phase Motors (Factory-Wired for High Speed Operation), Forward-Curved Fan Wheels

with Backdraft Dampers on Each Fan Housing

Motor, Quantity...Hp 4...1

Fan, Diameter...Width/in.! 11 x 10

LEGEND Sizes 040 and 050: Circuit 1 uses the left condenser coil, Circuit 2 the right.

MCHX-- Microchannel Heat Exchanger

*Sizes 020 to 027: Circuit 1 uses the lower portion of condenser coil, Circuit 2 uses the

upper portion.

Sizes 030 and 036: Circuit 1 uses the upper portion of condenser coil, Circuit 2 uses the

lower portion.

20

256T

5.9

1%

8.7

2

5VX530

53

15.0-17.9

1187

Size 060: Circuit A uses the two MCHX coils near the bulkhead, Circuit B uses the two

MCHX coils near the control box.

1-Rollout switch is manual reset.

]3

Table I -- Physical Data -- 48A2,A3,A4,A5 Units (cont)

UNIT 48A2,A3,A4,A5

NOMINAL CAPACITY (tons)

BASE UNIT

OPERATING WEIGHT (Ib)

COMPRESSOR

Quantity ... Type (Ckt l/Ckt 2)

Number of Refrigerant Circuits

Oil

REFRIGERANT TYPE

Operating Charge (Ib-oz)

Circuit 1

Circuit 2

MCHX CONDENSER*

Quantity

Total Face Area (sq ft)

CONDENSER FAN

Nominal Cfm

Quantity... Diameter (in.)

Motor Hp

EVAPORATOR COIL

Tube Size (in.)

Rows ... Fins/in.

Total Face Area (sq ft)

EVAPORATOR FAN

Quantity ... Size (in.)

Type Drive

Nominal Cfm

Motor Hp

Motor Frame Size

Motor Bearing Type

Maximum Allowable Rpm

Motor Pulley Pitch Diameter

Nominal Motor Shaft Diameter (in.)

Fan Pulley Pitch Diameter (in.)

Nominal Fan Shaft Diameter (in.)

Belt Quantity

Belt Type

Belt Length (in.)

Pulley Center Line Distance (in.)

Factory Speed Setting (rpm)

FURNACE SECTION

Supply Line Pressure Range

Rollout Switch Cutout

Temp (F)t

Burner Orifice Diameter (in ...drill size)

Natural Gas

Liquid Propane

Thermostat Heat Anticipator Setting

Stage 1 (amps)

Stage 2 (amps)

Gas Input (Btuh) Stage 1

(Low Heat/High Heat)

Stage 2

(Low Heat/High Heat)

Efficiency (Steady State) (%)

Temperature Rise Range

(Low Heat/High Heat)

Manifold Pressure (in. wg)

Natural Gas

Liquid Propane

Gas Valve Quantity

HIGH-PRESSURE SWITCH (psig)

Cutout

Reset (Auto.)

MIXED-AIR FILTERS

Quantity ... Size (in.) Standard

Pleated

Std

AIt

Std

AIt

15

254T

5.1

15/s

8.7

2

5VXS00

5O

15.0-17.9

1025

035DIE35 I 040DIE40 I 050DIE50 I 060DIE60

See Unit Weights Table

I I I

2 ... ZP67/2...ZP103precharged2I2...ZPlO3/2...ZPlO3precharged2 I2...ZP120/2...ZP120precharged2 I2...SM154/2...ZP154precharged2

R-410A

22-0 I25-8 I31-11 I30-10

30-11 26-0 31-11 38-5

t I 2 I 2 I 4

32.9 65.8 65.8 1052

Propeller Type Shrouded Axial Type

19500 I32000 I35,000 40000

2..30 4. 30 4...30 4..30.5

1 1 1 1

Cross-Hatched Copper Tubes Aluminum Plate Fins

1/2 I1/2

6... 16 4...17

31.3 48.1

2...20X 15

Belt

14,000

20 25

256T 284T

Ball

1300

5.7 8.2

t

8,7

115/16

5VX530 5VX550

t50178

15.0-17.. c

1147 1247

225

.111...34(Iow)/.120...31

(high)

,089,..43

0.1

0.1

262,500/800,000

350,000/800,000

81

15-45/30-80

3.5

3.5

2

15

254T

5.3

15/8

9.5

2

5VX530

53

15.0-

17.9

976

with Intertwined Circuits

" I I

4.17 6..16

31.3 31.3

Centrifugal Type

2...20X 15 2...20X 15

Belt

16000

20 25 30

256T 284T 286T

Ball

1300

5.7 _:_/_ i!i

15/8

9.5 .

115/16

2 I 2 2

5VX550 I5VX590 5VX570

55 59 57

15.0- 14.6- 14.6-

17.9 17.6 17.6

1050 1182 1234

Belt

18,000

20 25

256T 284T

Ball

1300

5.7 6.2

15/8 17/8

9.5 9.5

115/16

5VX550 5VX570

55 57

15.0- 14.6-

17.9 17.6

1050 1142

5,0-in. wg min/13.5-in, wg max.

225

.120.,.31

.098 .,.41

0.24

0.13

300,000/600,000

400,000/800,000

81

10-40/30-60

225

.120 ... 31

.096 ... 41

0.1

0.1

300,000/600,000

400,000/800,000

81

10-40/30-80

3.5

3.5

2

3.5

3.5

2

3...20X 15

Belt

24,000

25 30

284T 1200

5.3 5.9

17/8 17/8

9.1 9.5

115/16

5VX530 5VX550

53 55

15.2- 14.7-

17.5 17.2

1019 1087 .

225

.120...31

.096...41

0.1

0.1

582,000/873,000

776,000/1,164,000

82

10-40/30-60

3.3

3.3

3

650 650 650 650

500 500 500 500

10... 20 x 24 x2 10 ... 20 x 24 x 2 10 ... 20 x24x 2 16...20 x 24 x 2

5...20x20x4 5... 20 x20x4 5...20x20x4 8...20 x 20 x4

5...20x24x4 5...20 x24x4 5...20x24x4 8...20 x 24 x 4

OUTDOOR-AIR FILTERS

Quantity...Size (in.) 8...16 x 25 x 2 I 8 16x25x2 I 8...16 x 25 x 2 I 12. 16x25x24...20 x 25 x 2 4...20 x 25 x 2 4...20 x 25 x 2 6...20 x 25 x 2

POWER EXHAUST Direct Drive, Single-Phase Motors (Factory-Wired for High Speed Operation) Forward-Curved Fan Wheels

with Backdraft Dampers on Each Fan Housing

Motor,Quant,ty...Rp 4...1 I 4...1 I 4t I 6...1

Fan, Diameter...Width/in.) 11 x 10 11 x 10 11 x 10 11 x 10

LEGEND Sizes 040 and 050: Circuit 1 uses the left condenser coil, Circuit 2 the right.

MCHX i Microchannel Heat Exchanger

*Sizes 020 to 027: Circuit 1 uses the lower portion of condenser coil, Circuit 2 uses the

upper portion.

Sizes 030 and 035: Circuit 1 uses the upper portion of condenser coil, Circuit 2 uses the

lower portion.

4O

324T

6.5

21/8

9.5

3

5VX570

57

14.2-

17.0

1197

Size 060: Circuit A uses the two MCHX coils near the bulkhead, Circuit B uses the two

MCHX coils near the control box.

1-Rollout switch is manual reset.

14

CAUTION-NOTICE TO RIGGERS:

iiiil; i i_ i__i ALL PANELS MUST BEIN PLACE WHEN RIGGING.

NOTE: Rig with four cables and spread with two 92 inch (2337 MM) spreader bars.

Maintain a distance of 74 inches (1880 MM) from top of unit to eyehook,

CENTER

OF

GRAVITY

NOTE:

Add 3t2 Ibs (t42 kg) for export crating. (020-035 units)

Add 346 Ibs (157 kg)for export crating. (040-050 units)

Add 588 Ibs (266 kg) for export crating. (060 units)

Add the weights shown below for round tube plate fin coils

MODEL WEIGHT A BC

LBS KGS INCHES MM INCHES MM INCHES MM

50A2tA3 020 4599 2086 87.7 2227 98.0 2489 44.9 1141

48A21A3D 020 4689 2127 87.7 2227 96.8 2460 44.5 1130

48A2tA3E 020 4769 2163 87.7 2227 96.3 2446 44.2 1122

50A4/A5 020 4677 2122 87.7 2227 94.2 2394 49.5 1257

48A4/A5D 020 4729 2145 87.7 2227 93.2 2368 49.1 1246

48A41A5E 020 4809 2182 87.7 2227 92.8 2358 48.7 1237

50A2tA3 025 4735 2148 87.7 2227 98.5 2503 44.7 1135

48A21A3D 025 4825 2189 87.7 2227 97.4 2474 44.3 1125

48A2tA3E 025 4905 2225 87.7 2227 96.9 2460 44.0 1117

50A4/A5 025 4813 2183 87.7 2227 94.9 2410 49.1 1248

48A4/A5D 025 4865 2207 87.7 2227 93.9 2385 48.7 1238

48A41A5E 025 4945 2243 87.7 2227 93.5 2374 48.4 1229

50A2tA3 027 4801 2178 87.7 2227 97.2 2468 44.1 1120

48A21A3D 027 4891 2219 87.7 2227 96.1 2440 43.7 1110

48A2tA3E 027 4971 2255 87.7 2227 95.6 2427 43.4 1102

50A4/A5 027 4879 2213 87.7 2227 93.6 2377 48.5 1232

48A4/A5D 027 4931 2237 87.7 2227 92.6 2353 48.1 1221

48A41A5E 027 5011 2273 87.7 2227 92.2 2343 47.7 1213

50A2tA3 030 4832 2192 87.7 2227 95.2 2417 44.4 1128

48A21A3D 030 4922 2233 87.7 2227 94.1 2389 44.0 1118

48A2tA3E 030 5002 2269 87.7 2227 93.6 2376 43.7 1110

50A4/A5 030 4910 2227 87.7 2227 91.6 2327 48.8 1238

48A4/A5D 030 4962 2251 87.7 2227 90.7 2303 48.3 1228

48A41A5E 030 5042 2287 87.7 2227 90.3 2293 48.0 1219

50A2tA3 035 5134 2329 87.7 2227 95.9 2435 41.5 1053

48A21A3D 035 5339 2422 87.7 2227 94.8 2408 41.0 1043

48A2tA3E 035 5499 2494 87.7 2227 94.2 2393 40.7 1035

50A4/A5 035 5327 2416 87.7 2227 92.7 2353 45.7 1161

48A4/A5D 035 5379 2440 87.7 2227 91.7 2329 45.3 1151

48A41A5E 035 5539 2513 87.7 2227 91.2 2317 44.9 1141

50A2tA3 040 5564 2524 87.7 2227 121.8 3093 41 1052

48A2tA3D 040 5769 2617 87.7 2227 120.3 3056 41 1041

48A2tA3E 040 5929 2690 87.7 2227 118.8 3018 41 1034

50A4/A5 040 5757 2612 87.7 2227 116.5 2958 45.4 1152

48A4/A5D 040 5809 2635 87.7 2227 115.1 2924 44.9 1142

48A41A5E 040 5969 2708 87.7 2227 113.9 2893 44.6 1132

50A2tA3 050 5744 2606 87.7 2227 119.5 3035 42 1059

48A2tA3D 050 5949 2699 87.7 2227 118.1 2999 41 1048

48A2tA3E 050 6109 2771 87.7 2227 116.6 2962 41 1040

50A4/A5 050 5937 2693 87.7 2227 114.3 2904 45.5 1156

48A4/A5D 050 5989 2717 87.7 2227 112.9 2868 45.1 1145

48A41A5E 050 6149 2789 87.7 2227 111.7 2837 44.7 1135

50A2tA3 060 8311 3770 161.7 4106 184.9 4698 43 1102

48A2tA3D 060 8386 3804 161.7 4106 177.6 4511 41 1049

48A2tA3E 060 8626 3913 161.7 4106 170.4 4329 39 996

50A4/A5 060 8526 3868 161.7 4106 176.5 4484 47.1 1196

48A4/A5D 060 8426 3822 161.7 4106 169.6 4309 45.2 1149

Unit Size --cccc e20:027 030035 040 050 060 48A4/ASE 060 8676 3936 161.7 4106 163.3 4147 43.2 1097

Co_Rer Tube/Aluminum Fin Cond Coil_ 1001bst45kq _ f 15elbs[68k.} _ 1871bs_85k=q} t3171bs _144k_L)_ 261bst12kql I ..............

_ _ _ _ _ _ ,_ _ _ The weight d_stnbut_onand center of grawty _nformatlon are representative of a standard unit and include the impact of factory _nstalled economizer, largest IFN

Copper Tube/Copper Fm Cond Cod 263 Ibs (119 kg) 370 Ibs (168 kg) 512 Ibs 1232 kg) 751 Ibs (341 kg) 677 Ibs {307 kg)

I.| | | | | kg) I motor & VFD, modulatin power exhaust (both facto installed and tield installed options), and electric heat (on 50A onl ). 50EJ 500305 REV. 3.0

Fig. 11 -- Rigging Information

UNIT

48A2D,A3D

48A2E,A3E

48A4D,A5D

48A4E,A5E

020

3825

3905

3865

3945

Table 2 -- Unit Operating Weights (Ib)

025 027 030 035

3961 3961 3992 4340

4041 4041 4072 4500

4001 4001 4032 4380

4081 4081 4112 4540

040

4770

4930

4810

4970

050

4914

5074

4954

5114

060

7066

7306

7106

7356

Table 3-- Option and Accessory Weights (Ib)

UNIT

Barometric Relief

Non-Modulating Power Exhaust

Modulating Power Exhaust

Cu Tube/Alum Fin Cond. Coil

Cu Tube/Cu Fin Cond. Coil

OA Hood Crate/Packaging

(Less Hoods' Weight)

Outdoor Air Hoods/Filters (included with unit)

Hail Guards

Roof Curb (14-in.)

020 I025 I 027 I 030 I035 I 040 I 050 I060

OPTIONS/ACCESSORIES (WEIGHT ADDERS) (Ib)

300 300 300 300 300 300 300 450

450 450 450 450 450 450 450 675

500 500 500 500 500 500 500 725

100 100 100 150 150 187 317 26

263 263 263 370 370 512 751 677

45 45 45 45 45 45 45 45

(Packaging Only)

170I 170I 170I 170I 170I 170I 170I 255

73 73 I73 I73 I73 I146 I146I219

365 365 365 365 365 410 410 540

Table 4 -- Constant Volume Fan

Motor Weights (Ib)

MOTOR HIGH PREMIUM

HP UNIT VOLTAGE EFFICIENCY EFFICIENCY

IFM IFM

230/460 78 94

5HP 575 78 92

230/460 118 164

10 HP 575 118 156

230/460 150 217

15 HP 575 150 220

230/460 212 250

20 HP 575 212 258

230/460 240 309

25 HP 575 240 319

230/460 283 355

30 HP 575 283 359

230/460 372 415

40 HP 575 372 410

Table 5-- Variable Volume Fan Motor Weights (Ib)

MOTOR HIGH PREMIUM

HP UNIT VOLTAGE EFFICIENCY EFFICIENCY

IFM IFM

230/460 136 152

5HP 575 147 161

230/460 187 233

10 HP 575 187 225

230/460 249 316

15 HP 575 249 319

230/460 347 385

20 HP 575 311 357

230/460 375 444

25 HP 575 375 454

230/460 418 490

30 HP 575 418 494

230/460 507 550

40 HP 575 507 545

LEGEND AND NOTES FOR TABLES 2-5

LEGEND

Cu -- Copper

FlOP -- Factory-Installed Option

HP -- Horsepower

IFM -- Indoor-Fan Motor

OA -- Outdoor Air

VAV -- Variable Air Volume

VFD -- Variable Frequency Drive

*Outdoor-air hoods and filters included in base unit weights; indoor-fan motors are NOT

included.

NOTES:

1. Base unit weight includes OA hoods (economizer or outdoor air damper); does not include

an indoor-fan motor. ADD indoor motor, FlOPs and Accessories for TOTAL operating weight.

2. VAV motor weights include the indoor motor and the VFD, optional VFD bypass, VFD trans-

ducer and associated wiring.

[d

Table 6 -- Evaporator Fan Motor Data

MOTOR

UNIT FAN

SIZE MOTOR MOTOR SHAFT MOTOR SHEAVE

48A2,A3, HP SHAFT DIA. SPEED SHEAVE PITCH

A4,A5 (in.) (rpm) (P/N) DIAMETER

(in .)

5 1.125 717 BKS5 4.8

020 10 1.375 924 2BK50 4.4

15 1.625 1096 2B5V56 5.7

5 1.125 717 BK55 4.8

025 10 1.375 962 1B5V60 6.1

15 1.625 1106 2B5V54 5.5

10 1.375 848 2BK50 4.4

027 15 1.625 1059 2B5V56 4.9

20 1.625 1187 2B5V58 5.9

10 1.375 856 2BK50 4.4

030 15 1.625 1096 2B5V56 5.7

20 1.625 1187 2B5V58 5.9

15 1.625 1025 2B5V50 5.1

035 20 1.625 1147 2B5V56 5.7

25 1.875 1247 2B5V62 6.2

15 1.625 976 2B5V52 5.3

040 20 1.625 1050 2B5V56 5.7

25 1.875 1182 2B5V74 7.5

20 1.625 1050 2B5V56 5.7

050 25 1.875 1142 2B5V62 6.2

30 1.875 1234 2B5V66 6.7

25 1.875 1019 3B5V52 5.3

060 30 1.875 1086 3B5V58 5.9

40 2.125 1197 3B5V64 6.5

NOTES:

1. Motor shaft speed is 1750 rpm. The fan shaft diameter is 115/16

FAN

BUSHING FAN SHEAVE

DIAMETER SHEAVE PITCH

(in.) (P/N) DIAMETER

(in .)

NONE - 1.125 1B5V124 12.4

NONE - 1.375 2B5V86 8.6

B - 1.625 2B5V90 9.1

NONE - 1.125 1B5V124 12.4

H - 1.375 1B5V110 11.1

B - 1.625 2B5V86 8.7

NONE - 1.375 2B5V94 9.4

B - 1.625 2B5V90 8.1

B - 1.625 2B5V86 8.7

H - 1.375 2B5V94 9.0

B - 1.625 2B5V90 9.1

B - 1.625 2B5V86 8.7

B - 1.625 2B5V86 8.7

B - 1.625 2B5V86 8.7

B - 1.875 2B5V86 8.7

B - 1.625 2B5V94 9.5

B - 1.625 2B5V94 9.5

B - 1.875 2B5V110 11.1

B - 1.625 2B5V94 9.5

B - 1.875 2B5V94 9.5

B - 1.875 2B5V94 9.5

B - 1.875 3B5V90 9.1

B - 1.875 3B5V94 9.5

B - 2.125 3B5V94 9.5

BUSHING

DIAMETER

(in.)

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

B - 1.9375

BELT

(Quantity)

(P/N)

BX56

(2) BX50

(2) 5VX530

BX56

5VX570

(2) 5VX530

(2)BX50

(2) 5vx530

(2) 5vx530

(2)BX50

(2) 5vx530

(2) 5vx530

(2) 5vx500

(2) 5vx530

(2) 5vx530

(2) 5vx530

(2) 5vx550

(2) 5vx590

(2) 5vx550

(2) 5vx570

(2) 5vx570

(3) 5vx530

(3) 5vx550

(3) 5vx570

BELT

TENSION

(Ib at .25 in.)

8

8

9

8

11

9

8

10

11

8

9

11

9

10

11

10

11

11

10

11

13

12

12

14

inches. 2. All indoor fan motors meet the minimum efficiency requirements

as established by the Energy Policy Act of 1992 (EPACT), effective

October 24, 1997.

EXHAUST

AIR

©o

(

q>

RETURN SUPPLY

AIR AIR

CONDENSATE DRAIN

Fig. 12 -- Air Distribution -- Thru-the-Bottom

Step 5_Install Flue Hood

48A2,A3,A4,A5020-050 UNITS -- Flue hood is shipped in-

side gas section of unit. To install, secure flue hood to access

panel. See Fig. 14.

48A2,A3,A4,A5060 UNITS- Flue hood and wind baffle

are shipped inside gas section of unit. To install, secure flue

hood to access panel. Install the two pieces of the wind baffle

over the flue hood. See Fig. 15.

NOTE: When properly installed, flue hood will line up with

combustion fan housing. See Fig. 16.

Step 6 -- Trap Condensate Drain -- See Fig. 4-9

for drain location. Condensate drain is open to atmosphere and

must be trapped. Install a trapped dram at the drain location.

One 1-in. female coupling is provided inside the unit evapora-

tor section for condensate drain connection. A trap at least 4-in.

deep must be used. See Fig. 17. Trap must be installed to pre-

vent freeze-up.

Condensate pans are sloped so that water will completely

dram from the condensate pan to comply with indoor air quali-

ty guidelines. The condensate dram pans are not insulated.

AIR

RETURN AIR @_

SUPPLY AIR@

"<_x"_S

CONDENSATE DRAIN

Fig. 13 -- Air Distribution -- Thru-the-Side

Step 7-- Install Gas Piping -- Unit is equipped for

use with natural gas. Installation must conform with local

building codes or, m the absence of local codes, with the Na-

tional Fuel Gas Code, ANSI Z223.1.

Install manual gas shutoff valve with a Ys-in. _ pressure

tap for test gage connection at unit. Field gas piping must in-

clude sediment trap and union. See Fig. 18. An vs-m. NPT is

also located on the gas manifold adjacent to the gas valve.

Do not pressure test gas supply while connected to unit.

Always disconnect union before servicing. Personal injury

or damage to unit may occur.

IMPORTANT: Natural gas pressure at unit gas connection ]must not be less than 5 m. wg or greater than 13.5 in. wg. I

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

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

17

GAS SECTION

ACCESS PANEL

FLUE

HOOD

Fig. 14 nFlue Hood Location

(48A2,A3,A4,A5020-050 Units)

GAS SECTION

ACCESS PANEL

FLUE HOOD ,/

/

I! I BAFFLE I X '',( II

TOP VIEW SIDE VIEW

Fig. 15- Flue Hood Location

(48A2,A3,A4,A5060 Units)

FLUE HOOD

COMBUSTION SHIPPING

FAN HOUSING LOCATION

Fig. 16- Combustion Fan Housing Location

(48A2,A3,A4,A5020-050 Shown)

o o'o J

Fig. 17 -- Condensate Drain Trap Piping Details

(Typical Roof Curb or Slab Mount Shown)

MANUALSHUTOFF_

GAS

| PRESSURE TAP

(1/8" NPT PLUG)

'--- "_---- SEDIMENT TRAP

Fig. 18 -- Field Gas Piping

OPTIONAL STAGED GAS UNITS -- See Table 7 for staged

gas information. Staging pattern is selected during controls

start-up.

For complete information and service instructions for

staged gas control units, see Control Operation and Trouble-

shooting literature.

Step 8 -- Make Electrical Connections

POWER WIRING -- Units are factory wired for the voltage

shown on the unit nameplate.

Provide a unit safety disconnect switch in the main power

supply to each unit (see Fig. 19). Select switch size and mount-

ing location in accordance with applicable local codes or

National Electrical Code (NEC). If combining the functions of

safety disconnect with lnaxilnum overcurrent protection

(MOCP) fuses ("fused disconnect"), coordinate safety switch

size with MOCP size data as marked on unit informative plate.

18

Table 7 -- 48A Series Staged Gas Control

NUMBER OF

STAGES

5 stages

HEAT SIZE

MODEL NUMBER POSITION

5 6,7,8

020

025

027

S 030

035

040

050

035

T 040

050

020

T 025

027

030

T 060

S 060

Low

High

7 stages High

9stages High

11 stages Low

Unit may be equipped with optional factory-installed non-

fused disconnect switch (see Fig. 19). Provide maximum

overcurrent protection devices (fuses or HACR breakers, per

local codes) in branch circuit wiring remote from unit. Observe

requirements of NEC Article 440. Install service switch

upstream of remote fuses if required.

The main power terminal block is suitable for use with

aluminum or copper wire. See Fig. 19. Units have circuit

breakers for compressors, fan motors, and control circuit. The

unit must be electrically grounded in accordance with local

codes, or in absence of local codes, with NEC, ANSI Cl-latest

year.

FIELD POWER SUPPLY -- Unit is factory wired for volt-

age shown on unit nameplate. See Tables 8A and 8B for elec-

trical data.

Field wiring can be brought into the unit from bottom

(through basepan and roof curb) or through side of unit (corner

post next to control box).

A 31/2-in.NPT coupling for field power wiring and a 3/4-in.

NPT coupling for 24-v control wiring are provided in basepan.

In the side post, there are two 21/2-in. (sizes 020-035) or 3-in.

(sizes 040-060) knockouts for the field power wiring. See

Fig. 4-9. If control wiring is to be brought in through the side of

I

I

i

,?,l

ciz I

wcc i

_m

O) w

C3Z

-JZ

Luo

Eo

C3

TB1

FIELD =_

POWER =_]

SUPPLY __

rqN

EQUIP GND

FIELD-INSTALLED DISCONNECT

I

I

I

I

zI

O

D-

C3

d

LU

,7"

OPTIONAL

FACTORY-INSTALLED

DISCONNECT

.FTN

GND

FACTORY-INSTALLED DISCONNECT

LEGEND

GND- Ground

NEC -- National Electrical Code

TB -- Terminal Block

Fig. 19- Field Power Wiring Connections

unit, a Y/s-in. diameter hole is provided in the condenser side

post next to the control box.

Do not route control wiring in the same conduit as power

wiring.

If disconnect box is mounted to corner post, be careful not

to drill or screw into the condenser coil.

LEGEND AND NOTES FOR TABLES 8A AND 8B

LEGEND

FLA -- Full Load Amps

HAOR -- Heating, Air Conditioning and Refrigeration

LRA -- Locked Rotor Amps

MCA -- Minimum Circuit Amps ¢_._R%.

MOHX- Uicrochannel Heat Exchanger _//_l,_ o

MOCP -- Maximum Overcurrent Protection

NEC -- National Electrical Code

RLA -- Rated Load Amps

RTPF -- Round Tube Plate Fin Coil O S

&/ST_O

*Fuse or HACR circuit breaker per NEC.

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. The Canadian units may

be fuse or circuit 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 volt-

age imbalance.

% Voltage imbalance

max voltage deviation from average voltage

= 100x average voltage

Example: Supply voltage is 460-3-60.

A8 c AB = 452 v

BC = 464 v

AC = 455 v

Average Voltage = 452 + 464 + 455

3

1371

3

= 457

Determine maximum deviation from average voltage.

(AB) 457 - 452 = 5 v

(BC) 464 - 457 = 7 v

(AC) 457 - 455 = 2 v

Maximum deviation is 7 v.

Determine percent of voltage imbalance.

7

% Voltage Imbalance = 100 x 457

= 1.53%

This amount of phase imbalance is satisfactory as it is below the maximum

allowable 2%.

IIMPORTANT: If the supply voltage phase imbalance is more than 2%, I

contact your local electric utility company immediately. I

19

Table 8A -- 48A2,A3,A4,A5020-060 Units Without Convenience Outlet

UNIT

SIZE

48A

020

025

VOLTAGE COMPRESSOR CONDENSER EVAPORATOR POWER

VOLTAGE RANGE Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No. 2 FAN MOTOR FAN MOTOR EXHAUST

3 PH, 60 Hz

208

230

380

46O

575

208

230

380

46O

575

POWER SUPPLY

Min Max RLA LRA RLA LRA RLA LRA RLA LRA Qty FLA Hp

187 229 22.4 149 22.4 149 29.5 195 -- -- 2

207 253 22.4 149 22.4 149 29.5 195 -- -- 2

342 418 11.0 88 11.0 88 16.7 123 -- -- 2

414 508 10.6 75 10.6 75 14.7 95 -- -- 2

518 632 7.7 54 7.7 54 12.2 80 -- -- 2

187 229 29.5 195 29.5 195 29.5 195 -- -- 2

207 253 29.5 195 29.5 195 29.5 195 -- -- 2

342 418 16.7 123 16.7 123 16.7 123 -- -- 2

414 508 14.7 95 14.7 95 14.7 95 -- -- 2

518 632 12.2 80 12.2 80 12.2 80 -- -- 2

5

6.5

(ea) 10

15

5

6.6 10

(ea)

15

5

3.6

(ea) 10

15

5

3.3

(ea) 10

15

5

2.6 10

(ea)

15

5

6.5 10

(ea)

15

5

6.6

(ea) 10

15

5

3.6 10

(ea)

15

5

3.3 10

(ea)

15

5

2.6

(ea) 10

15

FLA FLA (total) MCA MOCP*

-- 111.4 125

16.7 23.6 135.0 150

-- 125.8 150

30.8 23.6 149.4 175

-- 145.1 175

46.2 23.6 168.7 200

-- 110.1 125

15.2 23.6 133.7 150

-- 122.9 150

28.0 23.6 146.5 175

-- 140.0 175

42.0 23.6 163.6 200

-- 59.2 70

9.1 14.8 74.0 90

-- 66.8 80

16.7 14.8 81.6 90

-- 76.5 100

24.5 14.8 91.3 110

-- 53.8 60

7.6 12.6 66.4 80

-- 60.2 70

14.0 12.6 72.8 80

-- 68.8 80

21.0 12.6 81.4 100

-- 42.0 50

6.1 9.6 51.6 60

-- 46.9 50

11.0 9.6 56.5 60

-- 54.1 70

17.0 9.6 63.7 80

-- 125.6 150

16.7 23.6 149.2 175

-- 140.0 150

30.8 23.6 163.6 175

-- 159.3 200

46.2 23.6 182.9 225

-- 124.3 150

15.2 23.6 147.9 175

-- 137.1 150

28.0 23.6 160.7 175

-- 154.2 175

42.0 23.6 177.8 200

-- 70.6 80

9.1 14.8 85.4 100

-- 78.2 90

16.7 14.8 93.0 100

-- 87.9 110

24.5 14.8 102.7 125

-- 62.0 70

7.6 12.6 74.6 80

-- 68.4 80

14.0 12.6 81.0 90

-- 77.0 90

21.0 12.6 89.6 110

-- 51.0 60

6.1 9.6 60.6 70

-- 55.9 60

11.0 9.6 65.5 70

-- 63.1 80

17.0 9.6 72.7 80

See Legend and Notes on page 19.

20

Table 8A -- 48A2,A3,A4,A5020-060 Units Without Convenience Outlet (cont)

UNIT

SIZE

48A

027

030

VOLTAGE COMPRESSOR CONDENSER EVAPORATOR POWER

VOLTAGE RANGE Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No. 2 FAN MOTOR FAN MOTOR EXHAUST

3 PH, 60 Hz

208

230

380

46O

575

208

230

380

46O

575

POWER SUPPLY

Min Max RLA LRA RLA LRA RLA LRA RLA LRA Qty FLA Hp

187 229 29.5 195 29.5 195 29.5 195 --

10

6.5

(ea) 15

20

FLA FLA (total) MCA MOCP*

-- 140.0 150

30.8 23.6 163.6 175

-- 159.3 200

46.2 23.6 182.9 225

-- 175.8 225

59.4 23.6 199.4 250

-- 137.1 150

28.0 23.6 160.7 175

-- 154.2 175

42.0 23.6 177.8 200

-- 169.2 200

54.0 23.6 192.8 225

-- 78.2 90

16.7 14.8 93.0 100

-- 87.9 110

24.5 14.8 102.7 125

-- 94.8 110

30.0 14.8 109.6 125

-- 68.4 80

14.0 12.6 81.0 90

-- 77.0 90

21.0 12.6 89.6 110

-- 84.5 110

27.0 12.6 97.1 110

-- 55.9 60

11.0 9.6 65.5 70

-- 63.1 80

17.0 9.6 72.7 80

-- 69.3 90

22.0 9.6 78.9 110

-- 144.3 175

30.8 23.6 167.9 175

-- 163.6 200

46.2 23.6 187.2 225

-- 180.1 225

59.4 23.6 203.7 250

-- 141.0 150

28.0 23.6 164.6 175

-- 158.5 200

42.0 23.6 182.1 200

-- 173.5 225

54.0 23.6 197.1 250

-- 76.9 90

16.7 14.8 91.7 100

-- 86.6 110

24.5 14.8 101.4 125

-- 93.5 110

30.0 14.8 108.3 125

-- 68.9 80

14.0 12.6 81.5 90

-- 77.7 90

21.0 12.6 90.3 110

-- 85.2 110

27.0 12.6 97.8 110

-- 50.6 60

11.0 9.6 60.2 70

-- 58.1 70

17.0 9.6 67.7 80

-- 64.3 80

22.0 9.6 73.9 90

207 253 29.5 195 29.5 195 29.5 195 --

10

6.6 15

(ea)

20

342 418 16.7 123 16.7 123 16.7 123 --

10

3.6

(ea) 15

20

414 508 14.7 95 14.7 95 14.7 95 -- -- 2

518 632 12.2 80 12.2 80 12.2 80 -- -- 2

10

3.3

(ea) 15

20

10

2.6 15

(ea)

20

187 229 23.2 184 23.2 164 23.2 164 23.2 164 2

10

6.5 15

(ea)

20

207 253 23.2 164 23.2 164 23.2 164 23.2 164 2

342 418 12.2 73 12.2 73 12.2 73 12.2 73 2

10

6.6

(ea) 15

20

10

3.6 15

(ea)

20

414 508 11.2 75 11.2 75 11.2 75 11.2 75 2

10

3.3 15

(ea)

20

518 632 7.9 54 7.9 54 7.9 54 7.9 54 2

10

2.6

(ea) 15

20

See Legend and Notes on page 19.

21

Table 8A -- 48A2,A3,A4,A5020-060 Units Without Convenience Outlet (cont)

UNIT

SIZE

48A

035

040

VOLTAGE COMPRESSOR CONDENSER EVAPORATOR POWER

VOLTAGE RANGE Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No. 2 FAN MOTOR FAN MOTOR EXHAUST

3 PH, 60 Hz

208

230

380

46O

575

208

230

380

46O

575

POWER SUPPLY

Min Max RLA LRA RLA LRA RLA LRA RLA LRA Qty FLA Hp

187 229 22.4 149 22.4 149 30.1 225 30.1 225 2

207 253 22.4 149 22.4 149 30.1 225 30.1 225 2

342 418 11.0 88 11.0 88 19.2 140 19.2 140 2

414 508 10.6 75 10.6 75 16.7 114 16.7 114 2

518 632 7.7 54 7.7 54 12.2 80 12.2 80 2

187 229 30.1 225 30.1 225 30.1 225 30.1 225 4

207 253 30.1 225 30.1 225 30.1 225 30.1 225 4

342 418 19.2 140 19.2 140 19.2 140 19.2 140 2

414 508 16.7 114 16.7 114 16.7 114 16.7 114 4

518 632 12.2 80 12.2 80 12.2 80 12.2 80 4

15

6.5

(ea) 20

25

15

6.6 20

(ea)

25

15

3.6

(ea) 20

25

15

3.3

(ea) 20

25

15

2.6 20

(ea)

25

15

6.5 20

(ea)

25

15

6.6

(ea) 20

25

15

3.6 20

(ea)

25

15

3.3 20

(ea)

25

15

2.6

(ea) 20

25

FLA FLA (total) MCA MOCP*

-- 175.8 200

46.2 23.6 199.4 225

-- 192.3 250

59.4 23.6 215.9 250

-- 211.5 250

74.8 23.6 235.1 300

-- 170.7 200

42.0 23.6 194.3 225

-- 185.7 225

54.0 23.6 209.3 250

-- 203.2 250

68.0 23.6 226.8 250

-- 98.2 110

24.5 14.8 113.0 125

-- 105.1 125

30.0 14.8 119.9 125

-- 115.1 150

38.0 14.8 129.9 150

-- 87.5 100

21.0 12.6 100.1 110

-- 95.0 110

27.0 12.6 107.6 125

-- 103.7 125

34.0 12.6 116.3 150

-- 66.3 80

17.0 9.6 75.9 90

-- 72.5 90

22.0 9.6 82.1 100

-- 78.8 100

27.0 9.6 88.4 110

-- 204.2 250

46.2 23.6 227.8 250

-- 220.7 250

59.4 23.6 244.3 300

-- 239.9 300

74.8 23.6 263.5 300

-- 199.3 225

42.0 23.6 222.9 250

-- 214.3 250

54.0 23.6 237.9 250

-- 231.8 250

68.0 23.6 255.4 300

-- 121.8 125

24.5 14.8 136.6 150

-- 128.7 150

30.0 14.8 143.5 150

-- 138.7 175

38.0 14.8 153.5 175

-- 106.3 125

21.0 12.6 118.9 125

-- 113.8 125

27.0 12.6 126.4 150

-- 122.5 150

34.0 12.6 135.1 150

-- 80.5 90

17.0 9.6 90.1 100

-- 86.7 100

22.0 9.6 96.3 110

-- 93.0 110

27.0 9.6 102.6 125

See Legend and Notes on page 19.

22

Table 8A -- 48A2,A3,A4,A5020-060 Units Without Convenience Outlet (cont)

UNIT

SIZE

48A

050

060

(MCHX)

060

(RTPF)

VOLTAGE

3 PH, 60 Hz

208

23O

38O

46O

575

208

23O

38O

46O

575

208

23O

38O

46O

575

VOLTAGE COMPRESSOR CONDENSER EVAPORATOR POWER POWER SUPPLY

RANGE Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No. 2 FAN MOTOR FAN MOTOR EXHAUST

Min Max RLA LRA RLA LRA RLA LRA RLA LRA Qty FLA Hp FLA FLA (total) MCA MOCP*

187 229 33.3 239 33.3 239 33.3 239 33.3 239 4

207 253 33.3 239 33.3 239 33.3 239 33.3 239 4

342 418 23.7 145 23.7 145 23.7 145 23.7 145 4

414 508 17.9 125 17.9 125 17.9 125 17.9 125 4

518 632 12.8 80 12.8 80 12.8 80 12.8 80 4

187 229 51.3 300 51.3 300 51.3 300 51.3 300 4

207 253 51.3 300 51.3 300 51.3 300 51.3 300 4

342 418 26.9 139 26.9 139 26.9 139 26.9 139 4

414 508 22.4 150 22.4 150 22.4 150 22.4 150 4

518 632 19.9 109 19.9 109 19.9 109 19.9 109 4

187 229 51.3 300 51.3 300 51.3 300 51.3 300 6

207 253 51.3 300 51.3 300 51.3 300 51.3 300 6

342 418 26.9 139 26.9 139 26.9 139 26.9 139 6

414 508 22.4 150 22.4 150 22.4 150 22.4 150 6

518 632 19.9 109 19.9 109 19.9 109 19.9 109 6

See Legend and Notes on page 19.

233.5 250

20 59.4 23.6 257.1 300

6.5 -- 252.7 300

(ea) 25 74.8 23.6 276.3 350

269.2 350

30 88.0 23.6 292.8 350

227.1 250

20 54.0 23.6 250.7 300

6.6 -- 244.6 300

(ea) 25 68.0 23.6 268.2 300

259.6 300

30 80.0 23.6 283.2 350

146.7 175

20 30.0 14.6 161.5 175

3.6 -- 157.7 175

(ea) 25 38.0 14.6 171.5 200

163.6 200

3O 43.5 14.6 178.4 200

116,6 125

2O 27.O 12.6 131.2 180

3.3 -- 127.3 180

25 34.O

(ea) 12.6 139.9 180

134.6 150

3O 4O.O 12.6 147.4 178

89.1 110

2O 22.0 9.6 98.7 110

2.6 -- 95.4 110

25 27.O

(ea) 9.6 105.0 125

101,6 125

30 32.0 9.6 111.2 125

320.7 350

25 74.8 35.4 356.1 400

5.5 -- 337.2 400

(ea) 30 88.0 35.4 372.6 450

369.7 450

40 114.0 35.4 405.1 500

313.4 350

25 68.0 35.4 348.8 400

5.8 -- 328.4 400

(ea) 30 80.0 35.4 363.8 400

358.4 450

40 104.0 35.4 393.8 450

169.9 200

25 38.0 22.2 192.1 228

3.7 -- 176.6 200

(ea) 30 43.8 22.2 199.0 228

192.7 228

4O 56.2 22.2 214.9 280

143.7 178

25 34.O 16.9 162.6 178

2.9 -- 181.2 178

3O 4O.O

(ea) 16.9 170.1 200

166.2 200

4O 52.0 18.9 185.1 225

122.6 125

25 27.0 14.4 137.0 150

2.3 -- 128.8 150

30 32.0

(ea) 14.4 143.2 175

140.1 175

40 41.0 14.4 154.5 175

337.7 400

25 74.8 35.4 373.1 400

6.5 -- 354.2 400

(ea) 30 88.0 35.4 389.6 450

386.7 500

40 114.0 35.4 422.1 500

329.8 350

25 68.0 35.4 365.2 400

6.6 -- 344.8 400

(ea) 30 80.0 35.4 380.2 450

374.8 450

40 104.0 35.4 410.2 500

151.9 175

25 38.0 22.2 170.6 200

3.6 -- 159.4 175

3O 43.5

(ea) 22.2 178.3 200

174.4 228

4O 56.2 22.2 193.3 228

151.9 175

25 34.O 16.9 170.6 200

3.3 -- 159.4 175

(ea) 30 40.0 16.9 178.3 200

174.4 228

4O 52.0 18.9 193.3 225

129.0 150

25 27.0 14.4 143.4 150

2.6 -- 135.2 150

30 32.0

(ea) 14.4 149.6 175

146.5 175

40 41.0 14.4 160.9 200

23

Table 8B -- 48A2,A3,A4,A5020-060 Units With Convenience Outlet

COMPRESSOR

VOLTAGE

UNIT VOLTAGE RANGE Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No. 2 FAN MOTOR FAN MOTOR EXHAUST

SIZE 3 PH, 60 Hz

48A

CONDENSER EVAPORATOR POWER CONVENIENCE POWER SUPPLY

Min Max RLA LRA RLA LRA RLA LRA RLA LRA Qty FLA

208 187 229 22.4 149 22.4 149 29.5 195

207 253 22.4 149 22.4 149 29.5 195

75 10.6 75 14.7 95414 508 10.6

230

020

460

OUTLET

575 518 632 7.7 54 7.7 54 12.2 80

187 229 29.5 195 29.5 195 29.5 1952O8

207 253 29.5 195 29.5 195 29.5 195

95 14.7 95 14.7 95

FLA

Hp FLA (total) FLA MCA MOCP*

-- 7.0 118.4 125

5 16.7 23.6 7.0 142.0 150

6.5 -- 7.0 132.8 150

2 (ea) 10 30.8 23.6 7.0 156.4 175

-- 7.0 152.1 175

15 46.2 23.6 7.0 175.7 200

-- 7.0 117.1 125

5 15.2 23.6 7.0 140.7 150

6.6 -- 7.0 129.9 150

2 (ea) 10 28.0 23.6 7.0 153.5 175

-- 7.0 147.0 175

15 42.0 23.6 7.0 170.6 200

-- 3.5 57.3 70

5 7.6 12.6 3.5 69.9 80

3.3 -- 3.5 63.7 70

2 (ea) 10 14.0 12.6 3.5 76.3 90

-- 3.5 72.3 90

15 21.0 12.6 3.5 84.9 100

-- 2.5 44.5 50

5 6.1 9.6 2.5 54.1 60

2.6 -- 2.5 49.4 60

2 (ea) 10 11.0 9.6 2.5 59.0 70

-- 2.5 56.6 70

15 17.0 9.6 2.5 66.2 80

-- 7.0 132.6 150

5 16.7 23.6 7.0 156.2 175

6.5 -- 7.0 147.0 175

2 (ea) 10 30.8 23.6 7.0 170.6 200

15 46.2 -- 7.0 166.3 200

23.6 7.0 189.9 225

5 15.2 -- 7.0 131.3 150

23.6 7.0 154.9 175

6.6 -- 7.0 144.1 150

2 (ea) 10 28.0 23.6 7.0 167.7 175

-- 7.0 161.2 200

15 42.0 23.6 7.0 184.8 225

-- 3.5 65.5 80

5 7.6 12.6 3.5 78.1 90

3.3 -- 3.5 71.9 80

2 (ea) 10 14.0 12.6 3.5 84.5 90

15 21.0 -- 3.5 80.5 100

12.6 3.5 93.1 110

-- 2.5 53.5 60

5 6.1 9.6 2.5 63.1 70

2.6 -- 2.5 58.4 70

2 (ea) 10 11.0 9.6 2.5 68.0 80

15 17.0 -- 2.5 65.6 80

9.6 2.5 75.2 90

-- 7.0 147.0 175

10 30.8 23.6 7.0 170.6 200

6.5 -- 7.0 166.3 200

2 (ea) 15 46.2 23.6 7.0 189.9 225

-- 7.0 182.8 225

20 59.4 23.6 7.0 206.4 250

-- 7.0 144.1 150

10 28.0 23.6 7.0 167.7 175

6.6 -- 7.0 161.2 200

2 (ea) 15 42.0 23.6 7.0 184.8 225

-- 7.0 176.2 225

20 54.0 23.6 7.0 199.8 250

-- 3.5 71.9 80

10 14.0 12.6 3.5 84.5 90

3.3 -- 3.5 80.5 100

2 (ea) 15 21.0 12.6 3.5 93.1 110

-- 3.5 88.0 110

20 27.0 12.6 3.5 100.6 125

-- 2.5 58.4 70

10 11.0 9.6 2.5 68.0 80

2.6 -- 2.5 65.6 80

2 (ea) 15 17.0 9.6 2.5 75.2 90

-- 2.5 71.8 90

20 22.0 9.6 2.5 81.4 100

414 508 14.7

575 518 632 12.2 80 12.2 80 12.2 80

230

025

460

187 229 29.5 195 29.5 195 29.5 1952O8

207 253 29.5 195 29.5 195 29.5 195

95 14.7 95 14.7 95414 508 14.7

23O

O27

46O

575 518 632 12.2 80 12.2 80 12.2 80

See Legend and Notes on page 19.

24

Table 8B -- 48A2,A3,A4,A5020-060 Units With Convenience Outlet (cont)

COMPRESSOR

VOLTAGE

UNIT VOLTAGE RANGE Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No. 2 FAN MOTOR FAN MOTOR EXHAUST

SIZE 3 PH, 60 Hz

48A

208

230

030

460

575

2O8

230

035

460

575

2O8

230

040

46O

CONDENSER EVAPORATOR POWER CONVENIENCE POWER SUPPLY

Min Max RLA LRA RLA LRA RLA LRA RLA LRA Qty FLA Hp

187 229 23.2 184 23.2 164 23.2 164 23.2 164

207 253 23.2 164 23.2 164 23.2 164 23.2 164

414 508 11.2 75 11.2 75 11.2 75 11.2 75

518 632 7.9 54 7.9 54 7.9 54 7.9 54

187 229 22.4 149 22.4 149 30.1 225 30.1 225

207 253 22.4 149 22.4 149 30.1 225 30.1 225

414 508 10.6 75 10.6 75 16.7 114 16.7 114

518 632 7.7 54 7.7 54 12.2 80 12.2 80

187 229 30.1 225 30.1 225 30.1 225 30.1 225

207 253 30.1 225 30.1 225 30.1 225 30.1 225

414 508 16.7 114 16.7 114 16.7 114 16.7 114

518 632 12.2 80 12.2 80 12.2 80 12.2 80

OUTLET

575

FLA FLA FLA MCA MOCP*

(total)

-- 7.0 151.3 175

10 30.8 23.6 7.0 174.9 200

6.5 -- 7.0 170.6 200

2 (ea) 15 46.2 23.6 7.0 194.2 225

-- 7.0 187.1 225

20 59.4 23.6 7.0 210.7 250

-- 7.0 148.0 175

10 28.0 23.6 7.0 171.6 175

6.6 -- 7.0 165.5 200

2 (ea) 15 42.0 23.6 7.0 189.1 225

-- 7.0 180.5 225

20 54.0 23.6 7.0 204.1 250

-- 3.5 72.4 80

10 14.0 12.6 3.5 85.0 90

3.3 -- 3.5 81.2 100

2 (ea) 15 21.0 12.6 3.5 93.8 110

-- 3.5 88.7 110

20 27.0 12.6 3.5 101.3 125

-- 2.5 53.1 60

10 11.0 9.6 2.5 62.7 70

2.6 -- 2.5 60.6 70

2 (ea) 15 17.0 9.6 2.5 70.2 80

-- 2.5 66.8 80

20 22.0 9.6 2.5 76.4 90

-- 7.0 182.8 225

15 46.2 23.6 7.0 206.4 250

6.5 -- 7.0 199.3 250

2 (ea) 20 59.4 23.6 7.0 222.9 250

-- 7.0 218.5 250

25 74.8 23.6 7.0 242.1 300

-- 7.0 177.7 200

15 42.0 23.6 7.0 201.3 225

6.6 -- 7.0 192.7 225

2 (ea) 20 54.0 23.6 7.0 216.3 250

-- 7.0 210.2 250

25 68.0 23.6 7.0 233.8 300

-- 3.5 91.0 110

15 21.0 12.6 3.5 103.6 110

3.3 -- 3.5 98.5 125

2 (ea) 20 27.0 12.6 3.5 111.1 125

-- 3.5 107.2 125

25 34.0 12.6 3.5 119.8 150

-- 2.5 68.8 80

15 17.0 9.6 2.5 78.4 90

2.6 -- 2.5 75.0 90

2 (ea) 20 22.0 9.6 2.5 84.6 100

-- 2.5 81.3 100

25 27.0 9.6 2.5 90.9 110

-- 7.0 211.2 250

15 46.2 23.6 7.0 234.8 250

6.5 -- 7.0 227.7 250

2 (ea) 20 59.4 23.6 7.0 251.3 300

-- 7.0 246.9 300

25 74.8 23.6 7.0 270.5 300

-- 7.0 206.3 225

15 42.0 23.6 7.0 229.9 250

6.6 -- 7.0 221.3 250

2 (ea) 20 54.0 23.6 7.0 244.9 250

-- 7.0 238.8 300

25 68.0 23.6 7.0 262.4 300

-- 3.5 109.8 125

15 21.0 12.6 3.5 122.4 125

3.3 -- 3.5 117.3 125

2 (ea) 20 27.0 12.6 3.5 129.9 150

-- 3.5 126.0 150

25 34.0 12.6 3.5 138.6 150

-- 2.5 83.0 90

15 17.0 9.6 2.5 92.6 100

2.6 -- 2.5 89.2 110

2 (ea) 20 22.0 9.6 2.5 98.8 110

-- 2.5 95.5 110

25 27.0 9.6 2.5 105.1 125

See Legend and Notes on page 19.

25

Table 8B -- 48A2,A3,A4,A5020-060 Units With Convenience Outlet (cont)

VOLTAG COMPRESSOR CONDENSER EVAPORATOR POWER CONVENIENCE

E

UNIT VOLTAGE RANGE Cir A, No. 1 Cir A, No. 2 Cir B, No. 1 Cir B, No. 2 FAN MOTOR FAN MOTOR EXHAUST OUTLET

SIZE 3PH, 60Hz

48A

208

230

050

460

575

208

230

060

(MCHX)

460

575

208

230

060

(RTPF)

460

575

POWER SUPPLY

Min Max RLA LRA RLA LRA RLA LRA RLA LRA Qty FLA Hp FLA

187 229 33.3 239 33.3 239 33.3 239 33.3 239

207 253 33.3 239 33.3 239 33.3 239 33.3 239

FLA

(total) FLA

414 508 17.9 125 17.9 125 17.9 125 17.9 125

m

20 59.0 23.6

6.5

4 (ea) 25 75.0 23.6

30 88.0 23.6

20 54.0 23.6

6.6

4 (ea) 25 68.0 23.6

30 80.0 23.6

518 632 12.8 80 12.8 80 12.8 80 12.8 80

m

20 27.0 12.6

3.3

4 (ea) 25 34.0 12.6

30 40.0 12.6

187 229 51.3 300 51.3 300 51.3 300 51.3 300

207 253 51.3 300 51.3 300 51.3 300 51.3 300

m

20 22.0 9.6

2.6

4 (ea) 25 27.0 9.6

30 32.0 9.6

414 508 22.4 150 22.4 150 22.4 150 22.4 150

m

25 75.0 35.4

5.5

4 (ea) 30 88.0 35.4

40 114.0 35.4

25 68.0 35.4

5.8

4 (ea) 30 80.0 35.4

40 104.0 35.4

518 632 19.9 109 19.9 109 19.9 109 19.9 109

187 229 51.3 300 51.3 300 51.3 300 51.3 300

m

25 34.0 18.9

2.9

4 (ea) 30 40.0 18.9

40 52.0 18.9

207 253 51.3 300 51.3 300 51.3 300 51.3 300

m

25 27.0 14.4

2.3

4 (ea) 30 32.0 14.4

40 41.0 14.4

25 74.8 35.4

6.5

6 (ea) 30 88.0 35.4

40 114.0 35.4

414 508 22.4 150 22.4 150 22.4 150 22.4 150

518 632 19.9 109 19.9 109 19.9 109 19.9 109

m

25 68.0 35.4

6.6

6 (ea) 30 80.0 35.4

40 104.0 35.4

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

3.5

3.5

3.5

3.5

3.5

3.5

2.5

2.5

2.5

2.5

2.5

2.5

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

3.5

3.5

3.5

3.5

3.5

3.5

2.5

2.5

2.5

2.5

2.5

2.5

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

7.0

3.5

3.5

3.5

3.5

3.5

3.5

2.5

2.5

2.5

2.5

2.5

2.5

MCA MOCP*

m

25 34.0 18.9

3.3

6 (ea) 30 40.0 18.9

40 52.0 18.9

25 27.0 14.4

2.6

6 (ea) 30 32.0 14.4

40 41.0 14.4

240.5

264.1

259.7

283.3

276.2

299.8

234.1

257.7

251.6

275.2

266.6

290.2

122.1

134.7

130.8

143.4

138.3

150.9

91.6

101.2

97.9

107.5

104.1

113.7

327.7

363.1

344.2

379.6

376.7

412.1

320.4

355.8

335.4

370.8

365.4

400.8

147.2

166.1

154.7

173.6

169.7

188.6

125.1

139.5

131.3

145.7

142.6

157.0

344.7

380.1

361.2

396.6

393.7

429.1

336.8

372.2

351.8

387.2

381.8

417.2

155.4

174.3

162.9

181.8

177.9

196.8

131.5

145.9

137.7

152.1

149.0

163.4

250

300

300

350

350

350

250

300

300

300

300

350

125

150

150

175

175

175

110

110

110

125

125

125

400

400

400

450

450

500

350

400

400

450

450

500

175

200

175

200

200

225

150

150

150

175

175

175

400

450

400

450

500

500

400

400

400

450

450

500

175

200

200

200

225

225

150

150

150

175

175

200

See Legend and Notes on page 19.

26

Routing Through Bottom of Unit -- If wiring is brought in

through bottom of unit, use field-supplied watertight conduit to

route power wiring through the 31/2-in. diameter hole provided

in the unit basepan.

Install conduit connector in unit basepan as shown in

Fig. 4-9. Route power and ground lines through connector to

terminal connections in unit control box as shown on unit

wiring diagram and Fig. 19.

Use strata relief going into control box through 35/s-in.

diameter hole provided. After wires are in unit control box,

connect to power terminal block (see Power Wiring section on

page 18).

Low-voltage wiring must be mn in watertight conduit from

the basepan to control box and through 7/s-in. diameter hole

provided in bottom of unit control box. Field-supplied strata

relief must be used going into the box. After wiring is in

control box, make connections to proper terminals on terminal

blocks (see Field Control Wiring section on this page).

Routing Through Side of Unit -- Route power wiring in

field-supplied watertight conduit into unit through 21/2-m. (siz-

es 020-035) or 3-m. (sizes 040-060) hole.

Use field-supplied strain relief going into control box

through 35/s-in. diameter hole provided. After wires are in unit

control box, connect to power terminal block (see Power Wir-

ing section on page 18).

Bring low-voltage control wiring through the 7/s-in. diame-

ter hole provided in the condenser section side post. Use strain

relief going into 7/s-in. diameter hole in bottom of unit control

box.

After wiring is in control box, make connection to proper

terminals on terminal blocks (see Field Control Wiring section

below).

IMPORTANT: The VAV (variable air volume) units use

variable frequency drives, which generate and can radiate

radio frequency energy. If units are not installed and used

in accordance with these instructions, they may cause radio

interference. They have been tested and found to comply

with lhnits of a Class A computing device as defined by

FCC (Federal Colmnunications Colmnission) regulations,

Subpart J of Part 15, which are designed to provide reason-

able protection against such interference when operated in

a colmnercial enviromnent.

The unit must be electrically grounded in accordance with

local codes and NEC ANSI/NFPA 70 (National Fire

Protection Association). Personal injury may result.

Affix crankcase heater sticker (located in the installers

packet) to unit disconnect switch.

Voltage to compressor terlninals during compressor operation

must be within the voltage range indicated on the unit name-

plate. Phases must be balanced within 2%.

Use the formula in Tables 8A and 8B to determine the per-

centage of voltage hnbalance.

IMPORTANT: If the supply voltage phase imbalance is

more than 2%, contact your local electric utility company

ilmnediately.

Unit failure as a result of operation on improper line voltage

or excessive phase imbalance constitutes abuse and may cause

damage to electrical components.

On 208/230-v units, transformers 1-5 are wired for 230-v. If

208/230-v unit is to be mn with 208-v power supply, the trans-

formers must be rewired as follows:

For transformer 1 move the black wires connected to termi-

nal H2 and connect it to terminal H3.

For transformers 2-4, that are used for the 24-volt control

circuits, connect as follows:

1. Remove cap from red (208 v) wire.

2. Remove cap from spliced orange (230 v) wire. Discon-

nect orange wire from black unit power wire.

3. Cap orange wire.

4. Splice red wire and black unit power wire. Cap wires.

If the unit is equipped with the optional convenience outlet

connect the yellow wire to H2 on transformer 5.

IMPORTANT: BE CERTA1N UNUSED WIRES ARE ]

CAPPED. Failure to do so may damage the transformers.

FIELD CONTROL WIRING- The 48A Series units sup-

port a large number of control options that can impact the field

control wiring.

The control options that the unit can provide relate to the

following parameters:

• CV (constant volume), VAV (variable air volume),

VVT :R:(variable volume variable temperature) or Carrier

TEMP system control operation.

• Standalone with a thermostat (CV) or with a space sensor

(CV and VAV)

• Network application with CCN (Carrier Comfort

Network R) or other networks

• Demand ventilation with CO2 sensor

• Economizer and economizer with changeover control

• Staged gas heat

• Building and duct static pressure control

• Fire shutdown and smoke control

• Diagnostics and monitoring

For constant volume applications a thermostat (T-Stat) or

space temperature sensor (SPT) will be required.

T-STAT (Conventional Thermostat) -- Unit can be con-

trolled with a Carrier-approved accessory electro-mechanical

or electronic thermostat that has two stages of cooling, two

stages of heating control and an output for indoor fan control. It

may also include thne of day scheduling or use the scheduling

routines built into the (_mfortLink TM controls.

Install thermostat according to the installation instructions

included with accessory thermostat and the unit wiring dia-

grams. Locate thermostat assembly on a solid interior wall in

the conditioned 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 connection in the mare control box. For thermostat

TB4 connections see Fig. 20.

NOTE: For wire runs up to 50 ft, use no. 18 AWG (American

Wire Gage) insulated wire (35 C minimum). For 50 to 75 ft,

use no. 16 AWG insulated wire (35 C minhnum). For over

75 ft, 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 require a junction box and splice at the

thermostat. Set heat anticipator settings as follows:

STAGE 1STAGE 2

SIZE (Wl) ON (Wl and W2) ON

020-050 0.24 0.13

060 0.36 0.13

Settings may be changed slightly to provide a greater degree of

comfort for a particular installation.

27

Staged Gas Control Option Thermistors -- If the unit is

equipped with the staged gas heat option, supply-air ther-

mistors must be installed. Three supply-air thermistors are

shipped with staged gas units and are inside the heating sec-

tion. The supply-air thennistors should be located in the supply

duct with the following criteria:

• Downstream of the heat exchanger cells

• Equally spaced as far as possible from the heat

exchanger cells

• In a duct location where none of the supply-air ther-

mistors are within sight of the heat exchanger cells

• In a duct location with good mixed supply-air portion of

the unit.

SPT (Space Temperature Sensor) -- For constant volume ap-

plications the (_mfortLink TM controls can also be used with

T55 and T56 space temperature sensors that use a 10K ther-

mistor. The T56 sensor also has the capability for a config-

urable temperature set point offset. For variable air volume ap-

plications only the T55 sensor can be used.

Install sensor according to the installation instructions

included with accessory sensor. Locate sensor assembly on a

solid interior wall in the conditioned space to sense average

temperature.

Run wiring to the space sensor as shown in Fig. 21.

Note that when the remote sensor is used, the red jumper

wires provided must be connected from TB4 terminal 4 to 5

and TB4 terminal 5 to 1.

Both the T55 and T56 have a CCN colrnnunications port and

this should be wired to the CCN Colmnunications TB3 board if

it is desired to have access to the CCN system through the sen-

sor. If more than one T-55 sensor is being used and averaged,

sensors must be wired in multiples of 4 or 9 as shown in Fig. 22.

T58 Colmnunicating Thermostat -- Carrier also has a fully

COlrnnunicating thermostat which, if used, will be wired to the

CCN communication connections on TB3 as described in the

Carrier Comfort Network :R:Interface section below.

Carrier Comfort Network Interface -- The rooftop units can

be connected to the CCN system. The colrununication bus

wiring is supplied and installed in the field. Wiring consists of

shielded, 3-conductor cable with drain wire. The system

elements are connected to the colmnunication bus in a daisy

chain arrangement. The positive pin of each system element

colmnunication connector must be wired to the positive pins of

the system element on either side of it, the negative pins must be

wired to the negative pins, and the signal pins must be wired to

signal ground pins. Wiring connections for CCN system should

be made at the TB3 terminal block using the screw terminals.

The TB3 board also contains an RJ14 CCN plug that can be

used to connect a field service computer or other CCN device

temporarily. There is also an RJ14 LEN (local equipment net-

work) connection that is used to connect a NavigatorTM device or

download software.

Conductors and drain wire must be 20 AWG minimum

stranded, tinned copper. Individual conductors must be insulat-

ed with PVC, PVC/nylon, vinyl, Teflon, or polyethylene. An

aluminum!polyester 100% foil shield and an outer jacket of

PVC, PVC/nylon, chrome vinyl, or Teflon with a minimum

operating temperature range of-20 C to 60 C (-4 F to 140 F) is

required. Table 9 lists cables that meet the requirements.

Table 9 -- CCN Connection Approved Shield Cable

MANUFACTURER CABLE PART NO.

Alpha 2413 or 5463

American A22503

Belden 8772

Columbia 02525

IMPORTANT: When connecting to CCN cmmnuni-

cation bus to system elements, use color coding

system for the entire network to simplify installation

and checkout. See Table 10.

Table 10- Color Code Recommendations

CCN BUS CONDUCTOR CCN PLUG PIN

SIGNAL TYPE INSULATION COLOR NO.

Positive (+) RED 1

Ground WHITE 2

Negative (-) BLACK 3

If a cable with a different color scheme is selected, a similar

color code should be adopted for the entire network. At each

system element, the shields of the colmnunication bus cables

must be tied together. If the colrnnunication bus is entirely

within one building, the resulting continuous shield must be

connected to a ground at one point only. If the colmnunication

bus cable exits from one building and enters another, the

shields must be connected to grounds at the lightning suppres-

sor in each building where the cable enters or exits the building

(one point per building only).

To connect the unit to the network:

1.

2.

3.

Turn offpower to the control box.

Cut the CCN wire and strip the ends of the red (+), white

(ground), and black (-) conductors. (If a different net-

work color scheme is used, substitute appropriate colors.)

Remove the 3-pin male plug from the base control board

in the main control box, and connect the wires as follows:

a. Insert and secure the red (+) wire to terminal 1 of

the 3-pin plug.

b. Insert and secure the white (ground) wire to termi-

nal 2 of the 3-pin plug.

c. Insert and secure the black (-) wire to terminal 3 of

the 3-pin plug.

1

FIELD-SUPPLIED THERMOSTAT

LIGHT

2 3 4 5 6 7 8

TB4

Fig. 20 -- Field Control Thermostat Wiring UNIT

TB5

T55 SPT T56 SPT

'1 I

DDDD[]

%%DD%

Fig. 21 -- Space Temperature Sensor Wiring

28

4. Insert the plug into the existing 3-pin mating connector on

the base module in the main control box.

VAV Units With Heat -- For variable air volume units that

will use heat, the variable air volume terminals should be

interlocked with the unit at TB5 terminals 1 and 2.

Demand Ventilation -- The unit can be equipped with a CO2

sensor for use in demand ventilation. This can be factory

supplied and will be mounted in the return duct. It can also be

field supplied and mounted in the return duct or in the space.

Connect the field-installed 4 to 20 mA sensor to TB5 terminals

6 and 7. Do not remove the factory-installed 182-olun resistor.

If an outdoor air quality sensor is used then it should be

wired to terminal 11 and 12 on TB6. This will require the use

of the optional controls expansion module.

Remote IAQ Ovemde -- If the control is being used with non

Carrier building management system it supports the use of the

remote IAQ ovemde switch. This should be connected to

TB6 terminal 13 and 14. Use of this will require the optional

controls expansion module.

Remote Economizer Position Control -- The (_mfortLink TM

controls will normally control the position of the economizer,

but it can also support field control of the economizer position

through a 4 to 20 mA signal. If this is used it should be con-

nected to TB5 terminal 6 and 7. If the signal is a 4 to 20 mA

signal then leave the 182-olun resistor in place.

Remote Economizer Enable -- If the control is being used

with other building management systems and the system will

control the enabling and disabling of the economizer free cool-

ing, this switch input can be connected to TB6 terminals 1 and

2. Note that the controls also support integrated economizer

changeover using outdoor dry bulb, differential dry bulb,

outdoor enthalpy and differential enthalpy.

Remote Occupancy Switch -- For interface to other building

management systems the control also supports a switch input

for remote occupancy signals. This wiring should be connected

to terminal TB6 terminal 1 and 3.

Remote Economizer Minimum Position Control -- If the

(_mfortLink control is controlling the economizer, but a remote

minhnum position is required, then an external 100K potentiom-

eter can be connected to TB5 tenninal 6 and 7. Remove the

factory-installed 182-olun resistor.

Smoke Sensor Interface -- The (_mfortLink control includes

an optional factory-installed return air smoke detector. Remote

alarm circuits can be wired to TB5 terminal 8 and 9.

Fire Shutdown and Smoke Control -- The control supports

interface to fire and smoke control systems and allows for the

following system ovemdes from remote switch inputs.

• Fire Shutdown -- Connect to TB6 terminals 8 and 9.

• Smoke Pressurization -- Connect to TB6 terminals

12 and 13. This requires the use of the optional con-

trols expansion module.

• Smoke Evacuation-- Connect to TB6 terminals 12 and

14. This requires the use of the optional controls expan-

sion module.

• Smoke Purge -- Connect to TB6 terminals 12 and 15.

This requires the use of the optional controls expansion

module.

Demand Limiting -- The control can also be used with demand

limiting control from remote building management systems. If a

two-stage system is going to be used with redline lhniting where

the machine is not allowed to increase load and load shed where

TB5 [

.....................RED r.................................................._ .........................................

D oL, .--, r i i.........i

L2YjY

SENSOR 1 SENSOR 2 SENSOR 3 SENSOR 4

SPACE TEMPERATURE AVERAGING (4 SENSOR APPLICATION)

TB5

[] ..............U...............U.........

SENSOR1 SENSOR2 SENSOR3

'U...................U...............U...........

! SENSOR5 SENSOR6

i SENSOR4

..........[J U..............U...........

SENSOR 7 SENSOR 8 SENSOR 9

SPACE TEMPERATURE AVERAGING (9 SENSOR APPLICATION)

NOTE: Use T55 sensor only.

Fig. 22 -- Space Temperature Averaging Wiring

29

the load is decreased to a configurable lhnit in capacity then these

can be connected to TB6 terminals 4 and 5, and 5 and 6. This re-

quires use of the controls expansion module.

Step 9 EMake Outdoor-Air Inlet Adjustments

ECONOMIZER AND FIXED OUTDOOR AIR

DAMPER -- Hoods are used on all units with economizer or

adjustable self-closing fixed outdoor air damper.

NOTE: If accessory power exhaust or barometric relief pack-

ages are being added to the unit, install power exhaust or baro-

metric relief before installing economizer hoods.

Economizer Hood Assembly -- The economizer hood is

shipped in a package secured to the outside of the unit. The

hood assemblies must be field-assembled. The 48A4,A5 units

are side supply and side return. The return duct lhnits access to

economizer filters from below. Filter tracks (mounting angle

without tabs) must be installed correctly to allow access to

economizer filters from each side.

The 48A2,A3,A4,A5020-050 units have two hoods on ev-

ery unit. Each hood has two lower filter tracks, one slotted side

and one side without slots. Construct the assembly so that the

slotted side is adjacent to the other hood when mounted on the

unit.

The 48A2,A3,A4,A5060 units have 3 hoods on every unit.

Each hood has two lower filter tracks, one slotted side and one

side without slots. Construct the two outer hood assemblies so

that the slotted sides are adjacent to the center hood when

mounted on the unit.

NOTE: Before assembly of the economizer hood, check along

the outer edges of the economizer assembly for any seal strip

protruding past the flanges. Trim the excess seal strip so that it

is flush with the economizer assembly flanges.

Perform the following procedure to assemble the economizer

hood.

1. Apply black seal strip (provided) to outside top-edge of

hood sides. Wrap seal strip over edge to cover top flange

(6 hood sides). Make sure seal strip covers screw holes.

Allow strip to overhang l/s-in, past the end opposite the

mounting flange. See Fig. 23.

2. Assemble hood sides, top, and cross lnember with

gasketed screws provided. See Fig. 24.

3. Attach 15 green speed clips (provided) to hood top.

4. Apply black seal strip (provided) to mounting flanges of

hood sides being sure to cover mounting holes. See

Fig. 25.

5. Apply black seal strip (provided) to back of hood top

mounting flange. Seal strip of hood top mounting flange

must press tightly against seal strip of hood side mount-

ing flanges. See Fig. 26.

6. Add gray foam strip (provided) to cross members on bot-

tom tray. See Fig. 27.

7. Place gray foam strip (provided) on inside of slotted hood

side between filter and cross member opposite the mount-

ing end. See Fig. 28.

8. Attach gray foam strip (provided) to block-off baffle on

outer face of flange. See Fig. 29.

9. Remove the screws on each end and along top of damper

assembly of unit. Remove top 4 screws on each side of

filter panel under damper assembly. Set hood assembly in

place and attach to unit using these screws.

10. Remove screws along bottom of damper assembly.

Locate and mount blockoff baffle using these screws.

11. Assemble 2 filter tracks side-by-side with the assembled

ends together.

12. Attach mounting angle (without tabs) to the assembled

end of the filter track. See Fig. 30.

13. Attach 9 green speed clips (provided) to hood side panels

without slots. Engagement section of clip faces up and to-

wards the outside of the hood side panels.

14. Attach remaining mounting angle (with tabs) to other end

of the filter track with no. 10 screws provided. See

Fig. 31.

15. Place filter track assembly in bottom of hood by placing

tabbed end into slotted side (with tab on bottom) and

attaching opposite end to hood with speed clips and

gasketed screws provided. Tabs can be hand bent after

they have been inserted into the side.

NOTE: The filter track assembly end with screws should face

away from the other hood when mounted on the unit. Be sure

the filters are installed with the airflow in the correct direction.

NOTE: Tabs from both filter tracks will be in the same space.

After one filter track has been inserted into hood side, bend the

tabs so they will not interfere with installation of the center

hood.

16. Attach black seal strip (provided) to filter cover. Seal strip

should be applied centered over the holes of the one

flange, making sure to fully cover holes and centered over

the other large flange. See Fig. 32.

17. Slide two 20 x 25-in. filters into cross members of hood

assembly. Attach filter cover over filters with screws and

speed clips provided.

Step 10 EPosition Power Exhaust/Barometric

Relief Damper Hood -- All units are shipped with the

hoods folded inside the unit in a shipping position. For 48A2,

and A3 units the hood must be tilted out once the unit is in-

stalled. On 48A4, A5 units, (designed for horizontal supply and

return) the assemblies will have to be relocated to return duct-

work. See Fig. 33 for dimensions and details.

All electrical connections have been made and adjusted at

the factory. The power exhaust blowers and barometric relief

dampers are shipped assembled and tilted back into the unit for

shipping. Brackets and extra screws are shipped in shrink wrap

around the dampers. If ordered, each unit will have 4

(48A2,A3,A4,A5020-050 units) or 6 (48A2,A3,A4,A5060

units) power exhaust blowers and motors or barometric relief

dampers.

1. Remove 9 screws holding each dmnper assembly in

place. See Fig. 34. Each damper assembly is secured with

3 screws on each side and 3 screws along the bottom.

Save screws.

Be careful when tilting blower assembly. Hoods and blow-

ers are heavy and can cause injury if dropped.

2. Pivot each damper assembly outward until edges of

damper assembly rest against inside wall 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 damper.

4. With screws saved from Step 1, install brackets on each

side of dmnper assembly.

5. Remove tape from damper blades.

Step 11 -- Route VAV Static Pressure Sensors

VAV DUCT PRESSURE TRANSDUCER -- The VAV duct

pressure transducer (VAV inverter pressure transducer) is locat-

ed behind the filter access door on the lower inner panel. See

Fig. 35. A section of field-supplied */4-in. plastic tubing must

be run from the high pressure tap on the differential pressure

switch and connected to a field-supplied tap in the supply-air

duct. The tap is usually located 2/3 of the way out on the main

supply duct. Remove plug button in panel to route robing.

3O

TOP

FLANGE

BLACK

SEAL HOOD SIDE

Fig. 23 -- Adding Seal Strip to Top of Hood Sides

HOOD TOP

HOOD SIDE //__ _

Fig. 26 -- Adding Seal Strip to Back of Hood Top

Mounting Flange

FILTER HOOD SIDE ECONOMIZER

COVER

FILTERS 'MOUNTING

ANGLE SIDE

CROSSMEMBER- (W/O TABS)

FILTER TRACK BLOCKOFF

ASSEMBLY BAFFLE

(WITH SCREWS)

NOTE: Left side economizer hood has mounting angle without tabs

and filter rack assembled end on the opposite side.

Fig. 24- Economizer Hood Assembly

(Right Side/Center Economizer Hood Shown)

MOUNTING

FLANGE

HOOD SIDE

GRAY FOAM STRIP

CROSS MEMBER

Fig. 27 -- Adding Foam Strip to Cross Member

HOODSIDE

(SLOTTED)

HOOD

Fig. 28 -- Adding Foam Strip to Hood Side

Fig. 25 -- Adding Seal Strip to Sides of Hood Top

Mounting Flange

3!

BLOCKOFF BAFFLE

GRAY FOAM STRIP

BLACK SEAL STRIP

(CENTERED)

FILTER COVER

Fig. 32 -- Attaching Seal Strip to Filter Cover

Fig. 29 -- Adding Seal Strip to Blockoff Baffle

MOUNTING ANGLE

(WITHOUT TABS)

FILTER TRACK

ASSEMBLY

Fig. 30 -- Mounting Angle (Without Tabs)

Attached to Filter Track Assembly

....

MOUNTING ANGLE

(WITH TABS)

Fig. 31 -- Mounting Angle (With Tabs) Attached to

Filter Track Assembly

VAV BUILD1NG PRESSURE TRANSDUCER -- The VAV

building pressure transducer (modulating power exhaust pres-

sure transducer) is located behind the filter access door on the

lower inner panel. See Fig. 35. A section of field-supplied

1/4-in. plastic tubing must be run from the high pressure tap on

the differential pressure switch to the conditioned space. The

pressure robe must be terminated in the conditioned space

where a constant pressure is required. This location is usually

in an entrance lobby so that the building exterior doors will

open and close properly. Remove plug button in panel to route

mbing.

The low pressure tap is factory-routed to the atmosphere.

For a positive-pressure building, route the high tap to building

air and low tap to atmosphere. For a negative-pressure

building, route the high tap to atmosphere and the low tap to

building air.

Step 12 -- Install All Accessories -- After all the

factory-installed options have been adjusted, install all field-

installed accessories. Refer to the accessory installation instruc-

tions included with each accessory.

The 48A Series units have a large number of factory-

installed options which were previously available only as

accessories. Some of the available options can also be installed

in the field if needed. In most cases the units have been

pre-wired so that the accessories can be easily installed.

Instructions are shipped with each accessory. Configuration of

the controls for these accessories as well as the factory-installed

options can be found in the Controls, Start-up, Operation,

Service and Troubleshooting book. The following is a list of

some of the COlnmon accessories:

• Thermostats and space temperature sensors

• LP (liquid propane) conversion kit

• Accessory barometric relief damper

• Accessory power exhaust

• Non-modulating to modulating power exhaust

• Condenser coil hail guards

• Outdoor humidity sensor (used for economizer enthalpy

changeover)

• Return air humidity sensors (used for economizer

differential enthalpy changeover)

• Return air smoke detector

• Controls expansion module (used for interface to build-

ing management systems, not typically needed on

system with the Carrier Comfort Network R_ [CCN]

system)

32

LOCATION

BAROMETRIC RELIEF

OR POWER EXHAUST

"SIDE #2"

ALTERNATE

LOCATION

(END)

ECONOMIZER

HOOD

42.56"

J

\

\\ ECONOMIZER

HOOD

\\

\

\

12.94

(UNIT

)PENING)

J BOX

PLENUM RATED

CABLE

(FIELD SUPPLIED)

J BOX

NOTE: 027-050 SIZES SHOWN (2 POWER EXHAUST FANS).

SIZE 060 HAS 3 POWER EXHAUST FANS. ALL

UNIT SIZES HAVE THE SAME SIZE POWER EXHAUST.

Fig. 33 -- Power Exhaust Relocated to Side Return Duct

I" 142.58

____°jL% i

i°o -L-_? 31

_,o19..

NOTES:

1. Unless otherwise specified, all dimensions are to outside of part.

2. Dimensions are in inches.

_0.90

_23.24

2_L

L1.38

3, On 48A4,A5 units, accessory barometric relief or power exhaust must be mounted in the field-supplied return ductwork,

Fig. 34 -- Barometric Relief Damper and Power Exhaust Mounting Details

-11.03----"

'k

33

AUXILIARY PRESSURE TRANSDUCERS

CONTROL BOX (INSIDE OF PANEL)

Fig. 35 -- Pressure Transducer Locations

• Plugged filter sensor

• MotormasteKR)V low ambient head pressure control

IMPORTANT: Carrier recommends the installation of

field-fabricated wind baffles on all vertically oriented

condenser coils when operating in enviromnents with

prevailing winds of more than 5 MPH and where tem-

peratures drop below 32 F. See the Motormaster

accessory installation guide for instructions.

Step 13 EField Modifications

DUCTWORK

Bottom Return Units (48A2 and A3) Field-Modified for

Side Return -- The 48A2 and A3 units with bottom return air

connections may be field-modified to accolrnnodate side return

air connections.

IMPORTANT: The following section is a guideline and not

a comprehensive procedure to field modify the units. The

installing contractor must provide some design initiative.

Field-conversion is complex and is not recommended.

Conversion to horizontal return requires that the bottom

return openings of the unit must be sealed with airtight panels

capable of supporting the weight of a person. The return

ductwork connection locations on the side of the unit are higher

than normal (31-m. high). Unit-mounted power exhaust or

barometric relief cannot be used because of return air ductwork

will cover the power exhaust or barometric relief installation

locations. Power exhaust or barometric relief may be installed

in the return air ductwork.

To convert the unit, perform the following:

1. Seal the bottom return openings of the unit with airtight

panels capable of supporting the weight of a person.

2. Remove the panels located below the economizer

outdoor-air dampers. These openings will be used for the

return-air ductwork. There are 2 panels on 48A2,A3020-

050 units. There are 3 panels on 48A2,A3060 units.

These openings are normally used for power exhaust or

barometric relief.

3. Run the return air ductwork up to the openings. One

single duct is recolrnnended to connect to the unit over

the return air openings. See Fig. 36. The return duct must

incorporate a minimum 3/4-in. flange for connection to

the unit cabinet. The unit does not have duct flanges for

this conversion.

Side Supply and Return Units (48A4.A5) With Field-

Installed Power Exhaust in Return Duct -- Space must be

available in the return duct to mount the power exhaust fan

(gravity relief) modules. Dimensions and suggested locations

are shown in Fig. 36. These instructions are a guideline and not

a comprehensive procedure. The design contractor must pro-

vide some design initiative.

The wiring harness that is provided with the power exhaust

accessory is not long enough for the fan modules to be mount-

ed in the return air duct. Field-supplied wiring must be spliced

into the harness. Use a junction box at each splice. The wiring

may be mn in the return duct, or externally in conduit. A ser-

vice access panel will be needed near each power exhaust fan.

34

97.78" (027-050), 150.4T' (060)

INSIDE DIMENSION

31.25"

INSIDE

Fig. 36 -- Side Return Air Conversion

35

Copyright 2008 Carrier Corporation

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

Catalog No. 04-53480051-01 Printed in U.S.A. Form 48A-6SI Pg 36 5-08 Replaces: 48A-4Sl