Carrier 48EJ, EY024-048 User Manual 2

4.5 (2)

48EJ,EK,EW,EY024-048 Single Package Rooftop Units Electric Cooling/Gas Heating

Installation, Start-Up and

Service Instructions

CONTENTS

Page

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

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-31

Step 1 Ð Provide Unit Support . . . . . . . . . . . . . . . 1

·ROOF CURB

·ALTERNATE UNIT SUPPORT

Step 2 Ð Rig and Place Unit . . . . . . . . . . . . . . . . . . 2

·POSITIONING

·ROOF MOUNT

Step 3 Ð Field Fabricate Ductwork . . . . . . . . . . . . 2 Step 4 Ð Install Flue Hood . . . . . . . . . . . . . . . . . . 12 Step 5 Ð Trap Condensate Drain . . . . . . . . . . . . 13 Step 6 Ð Install Gas Piping . . . . . . . . . . . . . . . . . . 13 Step 7 Ð Controls Options . . . . . . . . . . . . . . . . . . 13

·CONSTANT VOLUME APPLICATIONS

·VARIABLE AIR VOLUME (VAV) APPLICATIONS

Step 8 Ð Make Electrical Connections . . . . . . . 16

·POWER WIRING

·FIELD POWER SUPPLY

·FIELD CONTROL WIRING

Step 9 Ð Make Outdoor-Air Inlet

Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

·ECONOMIZER

·ECONOMIZER SETTINGS

Step 10 Ð Position Power Exhaust/Barometric Relief Hood . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Step 11 Ð Install All Accessories . . . . . . . . . . . . 30

START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31-44 SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44-55 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . 56-61 START-UP CHECKLIST . . . . . . . . . . . . . . . . CL-1,CL-2

SAFETY CONSIDERATIONS

Installation and servicing of air-conditioning equipment can be hazardous due to system pressure and electrical components. Only trained and quali®ed service personnel should install, repair, or service air-conditioning equipment.

Untrained personnel can perform the basic maintenance functions of cleaning coils and ®lters and replacing ®lters. All other operations should be performed by trained service personnel. When working on air-conditioning equipment, observe precautions in the literature, tags and labels attached to the unit, and other safety precautions that may apply.

Follow all safety codes. Wear safety glasses and work gloves. Use quenching cloth for unbrazing operations. Have ®re 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 ¯ammable 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 neighbor's phone. Follow the gas supplier's instructions.

4.If you cannot reach your gas supplier, call the ®re 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 ®eld-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).

INSTALLATION

Step 1 Ð Provide Unit Support

1.All panels must be in place when rigging.

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

ROOF CURB Ð Assemble or install accessory roof curb in accordance with instructions shipped with this accessory. See Fig. 1 and 2. Install insulation, cant strips, roo®ng, and counter ¯ashing 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 function properly. Unit leveling tolerance is shown in Fig. 1 and 2. Refer to Accessory Roof Curb Installation Instructions for additional information 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 and 2. Improperly applied gasket can also result in air leaks and poor unit performance.

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

Book

1

 

PC 111

Catalog No. 564-962

Printed in U.S.A.

Form 48E-5SI

Pg 1

8-97

Replaces: 48E-3SI

Tab

1a

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ALTERNATE UNIT SUPPORT Ð When the preferred curb or slab mount cannot be used, support unit with sleepers on perimeter, using unit curb support area. If sleepers cannot be used, support long sides of unit (refer to Fig. 3-6) with a minimum number of 4-in. x 4-in. pads spaced as follows: 48EJ,EK,EW,EY024-034 units require 3 pads on each side; 48EJ,EK,EW,EY038-048 units require 4 pads on each side. Unit may sag if supported by corners only.

Step 2 Ð Rig and Place Unit Ð Inspect unit for transportation damage. File any claim with transportation agency.

Do not drop unit; keep upright. Use spreader bars over unit to prevent sling or cable damage. Level by using unit frame as a reference; leveling tolerance is shown in Fig. 1 and 2. See Fig. 7 for additional information. Unit operating weight is shown in Table 1.

NOTE: On retro®t jobs, ductwork may be attached to old unit instead of 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. 7. Refer to rigging instructions on unit.

POSITIONING Ð Maintain clearance, per Fig. 3-6, around and above unit to provide minimum distance from combustible materials, proper air¯ow, 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 ventilation 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 ¯ue 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, ¯ue assembly must be at least 7 ft above grade.

ROOF MOUNT Ð Check building codes for weight distribution requirements. Unit weight is shown in Table 1.

Step 3 Ð Field Fabricate Ductwork

48EJ,EK UNITS Ð Field-fabricated ductwork should be attached to the roof curb. Supply and return duct dimensions are shown in Fig. 3 and 4. Air distribution is shown in Fig. 8.

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 inside the duct.

Secure all ducts to the building structure, using ¯exible duct connectors between roof curb and ducts as required. Ducts passing through an unoccupied space must be insulated 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.

For vertical supply and return units, tools or parts could drop into ductwork and cause an injury. Install 90 degree elbow turns in the supply and return ductwork between the unit and the conditioned space. If a 90 degree elbow cannot be installed, then grilles of sufficient strength and density should be installed to prevent objects from falling into the conditioned space.

48EW,EY UNITS Ð Remove shipping covers from supply and return air openings. Attach ®eld-supplied ductwork to unit. Use a single duct over both return openings and a single duct over both supply openings. See Fig. 5 and 6 for duct opening dimensions. Secure all ducts to the building structure. See Fig. 9. Use ¯exible duct connectors between unit and ducts as required. Insulate and weatherproof all external ductwork, joints, and building openings with counter ¯ashing and mastic in accordance with applicable codes.

Ducts passing through an unconditioned space must be insulated and covered with a vapor barrier.

Install accesssory barometric relief or power exhaust in the ®eld-fabricated return ductwork. Refer to Position Power Exhaust/Barometric Relief Damper Hood section on page 26 for more information.

Instructions continued on page 12.

2

NOTES:

1.All roof curb parts are to be 16 ga galvanized steel.

2.Dimensions are in inches.

3.To prevent standing water in the drain pan of the indoor section and the heat exchangers, unit can only be pitched as shown.

UNIT LEVELING TOLERANCES DIMENSIONS*

(Degrees and Inches)

 

A

 

B

Deg.

 

in.

Deg.

 

in.

1.0

 

2.9

.50

 

.75

 

 

 

 

 

 

*From edge of unit to horizontal.

Fig. 1 Ð Roof Curb (Sizes 024-034)

3

Carrier 48EJ, EY024-048 User Manual 2

NOTES:

1.All roof curb parts are to be 16 ga galvanized steel.

2.Dimensions are in inches.

3.To prevent standing water in the drain pan of the indoor section and the heat exchangers, unit can only be pitched as shown.

UNIT LEVELING TOLERANCES DIMENSIONS*

(Degrees and Inches)

 

A

 

B

Deg.

 

in.

Deg.

 

in.

1.0

 

2.9

.50

 

.75

 

 

 

 

 

 

*From edge of unit to horizontal.

Fig. 2 Ð Roof Curb (Sizes 038-048)

4

VFD Ð Variable Frequency Drive

NOTES:

1. Weights include economizer (STD).

2. Center of gravity.

3. Do not locate adjacent units with ¯ue discharge facing economizer inlet. Minimum clearances to be:

Adjacent Units: 158-09 Top of Units: No overhang Condenser Coil: 48-09 Economizer Side: 68-09 Gas Heat Side: 48-09

Filter Access Side: 108-09 (For Removal of Evaporator Coil)

4. For smaller service and operational clearances, contact Carrier Application Engineering department.

5. Bottom ducts designed to be attached to accessory roof curb. If unit is mounted on dunnage, it is recommended the ducts be supported by cross braces as done on accessory roof curb.

6. Dimensions are in inches.

UNIT

OPERATING

A

B

CORNER WEIGHT (lb)

WEIGHT

SIZE

 

 

 

 

 

 

lb

ft-in.

ft-in.

1

2

3

4

 

48EJ,EKD024

4176

6- 03¤8

3-63¤8

879

954

1220

1124

48EJE024

4256

6- 15¤16

3-611¤16

917

973

1218

1148

48EJ,EKD028

4262

5- 95¤8

3-8

899

899

1232

1232

48EJE028

4342

5-101¤8

3-85¤16

929

916

1240

1257

48EJ,EKD030

4262

5- 95¤8

3-8

899

899

1232

1232

48EJE030

4342

5-101¤8

3-85¤16

929

916

1240

1257

48EJ,EKD034

4262

5- 95¤8

3-8

899

899

1232

1232

48EJE034

4342

5-101¤8

3-85¤16

929

916

1240

1257

Fig. 3 Ð Base Unit Dimensions, 48EJ,EK024-034

5

VFD Ð Variable Frequency Drive

NOTES:

1. Weights include economizer (STD).

2. Center of gravity.

3.Do not locate adjacent units with ¯ue discharge facing economizer inlet. Minimum clearances to be:

Adjacent Units: 158-09 Top of Units: No overhang Condenser Coil: 48-09 Economizer Side: 68-09 Gas Heat Side: 48-09

Filter Access Side: 108-09 (For Removal of Evaporator Coil)

4.For smaller service and operational clearances, contact Carrier Application Engineering department.

5.Bottom ducts designed to be attached to accessory roof curb. If unit is mounted on dunnage, it is recommended the ducts be supported by cross braces as done on accessory roof curb.

6.Dimensions are in inches.

UNIT

OPERATING

A

B

CORNER WEIGHT (lb)

WEIGHT

SIZE

 

 

 

 

 

 

lb

ft-in.

ft-in.

1

2

3

4

 

48EJ,EKD038

4442

7- 811¤16

3-107¤8

1021

894

1180

1347

48EJE038

4602

7-101¤8

3-113¤16

1080

934

1200

1388

48EJ,EKD044

4668

7- 55¤16

3-107¤8

1033

906

1275

1455

48EJE044

4828

7- 613¤16

3-113¤16

1094

945

1293

1496

48EJ,EKD048

4955

7- 311¤16

3-101¤2

1068

953

1384

1550

48EJE048

5115

7- 53¤16

3-1013¤16

1129

994

1401

1592

Fig. 4 Ð Base Unit Dimensions, 48EJ,EK038-048

6

VFD Ð Variable Frequency Drive

NOTES:

1.Weights include economizer (STD).

2. Center of gravity.

3.Do not locate adjacent units with ¯ue discharge facing economizer inlet. Minimum clearances to be:

Adjacent Units: 158-09 Top of Units: No overhang Condenser Coil: 48-09 Economizer Side: 68-09 Gas Heat Side: 48-09

Filter Access Side: 108-09 (For Removal of Evaporator Coil)

4.For smaller service and operational clearances, contact Carrier Application Engineering department.

5.Dimensions are in inches.

6.For side-supply/return applications, a single return and supply ductwork connection is recommended for covering both return and both supply openings.

UNIT

OPERATING

A

B

CORNER WEIGHT (lb)

WEIGHT

SIZE

 

 

 

 

 

 

lb

ft-in.

ft-in.

1

2

3

4

 

48EW,EYD024

4176

6- 03¤8

3-63¤8

879

954

1220

1124

48EWE024

4256

6- 15¤16

3-611¤16

917

973

1218

1148

48EW,EYD028

4262

5- 95¤8

3-8

899

899

1232

1232

48EWE028

4342

5-101¤8

3-85¤16

929

916

1240

1257

48EW,EYD030

4262

5- 95¤8

3-8

899

899

1232

1232

48EWE030

4342

5-101¤8

3-85¤16

929

916

1240

1257

48EW,EYD034

4262

5- 95¤8

3-8

899

899

1232

1232

48EWE034

4342

5-101¤8

3-85¤16

929

916

1240

1257

Fig. 5 Ð Base Unit Dimensions, 48EW,EY024-034

7

VFD Ð Variable Frequency Drive

NOTES:

1.Weights include economizer (STD).

2. Center of gravity.

3.Do not locate adjacent units with ¯ue discharge facing economizer inlet. Minimum clearances to be:

Adjacent Units: 158-09 Top of Units: No overhang Condenser Coil: 48-09 Economizer Side: 68-09 Gas Heat Side: 48-09

Filter Access Side: 108-09 (For Removal of Evaporator Coil)

4.For smaller service and operational clearances, contact Carrier Application Engineering department.

5.Dimensions are in inches.

6.For side-supply/return applications, a single return and supply ductwork connection is recommended for covering both return and both supply openings.

UNIT

OPERATING

A

B

CORNER WEIGHT (lb)

WEIGHT

SIZE

 

 

 

 

 

 

lb

ft-in.

ft-in.

1

2

3

4

 

48EW,EYD038

4442

7- 811¤16

3-107¤8

1021

894

1180

1347

48EWE038

4602

7-101¤8

3-113¤16

1080

934

1200

1388

48EW,EYD044

4668

7- 55¤16

3-107¤8

1033

906

1275

1455

48EWE044

4828

7- 613¤16

3-113¤16

1094

945

1293

1496

48EW,EYD048

4955

7- 311¤16

3-101¤2

1068

953

1384

1550

48EWE048

5115

7- 53¤16

3-1013¤16

1129

994

1401

1592

Fig. 6 Ð Base Unit Dimensions, 48EW,EY038-048

8

UNIT

WEIGHT

A

 

 

B

 

C

lb

kg

in.

 

mm

in.

 

mm

in.

 

mm

 

 

 

 

48EJ,EK,EW,EYD024

4176

1894

 

 

 

72.4

 

1839

42.4

 

1072

48EJ,EWE024

4256

1930

 

 

 

73.3

 

1862

42.7

 

1085

48EJ,EK,EW,EYD028

 

 

 

 

 

 

 

 

 

 

 

48EJ,EK,EW,EYD030

4262

1933

87.68

 

2227

69.6

 

1768

44.0

 

1118

48EJ,EK,EW,EYD034

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

48EJ,EWE028

 

 

 

 

 

 

 

 

 

 

 

48EJ,EWE030

4342

1969

 

 

 

70.1

 

1781

44.3

 

1125

48EJ,EWE034

 

 

 

 

 

 

 

 

 

 

 

48EJ,EK,EW,EYD038

4442

2015

 

 

 

92.7

 

2355

46.9

 

1191

48EJ,EWE038

4602

2087

 

 

 

94.1

 

2390

47.2

 

1199

48EJ,EK,EW,EYD044

4668

2117

150

 

3810

89.3

 

2268

46.9

 

1191

48EJ,EWE044

4828

2190

 

90.8

 

2306

47.2

 

1199

 

 

 

 

 

48EJ,EK,EW,EYD048

4955

2248

 

 

 

87.7

 

2228

46.5

 

1181

48EJ,EWE048

5115

2320

 

 

 

89.2

 

2266

46.8

 

1189

NOTICE TO RIGGERS:

ALL PANELS MUST BE IN PLACE

WHEN RIGGING.

NOTE: Rig with four cables and spread with two 92 in. (2337 mm) spreader bars. Maintain a distance of 74 in. (1880 mm) from top of unit to eyehook.

NOTE:

Add 32 lb (14.5 kg) for domestic crating.

Add 312 lb (142 kg) for export crating (024-034 units).

Add 346 lb (157 kg) for export crating (038-048 units).

Add 250 lb (113 kg) for power exhaust.

Add 220 lb (100 kg) for copper condenser coil (024-034 units).

Add 285 lb (129 kg) for copper condenser coil (038,044 units).

Add 380 lb (172 kg) for copper condenser coil (048 unit).

Fig. 7 Ð Rigging Label

9

Table 1 Ð Physical Data

UNIT 48EJ,EK,EW,EY

 

 

 

024D/E

 

 

028D/E

 

 

 

030D/E

 

 

034D/E

 

NOMINAL CAPACITY (tons)

 

 

20

 

 

 

25

 

 

 

 

27

 

 

 

30

 

OPERATING WEIGHT (lb)*

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Unit

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Al/Al² (Lo Heat/Hi Heat)

 

 

4176/4256

 

 

4262/4342

 

 

 

 

4262/4342

 

 

 

4262/4342

 

Al/Cu² (Lo Heat/Hi Heat)

 

 

4396/4476

 

 

4482/4562

 

 

 

 

4482/4562

 

 

 

4482/4562

 

Roof Curb (14-in. curb)

 

 

365

 

 

 

365

 

 

 

 

365

 

 

 

365

 

COMPRESSOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Type Ckt 1

 

 

 

06D328

 

 

06D328

 

 

 

06D537

 

 

06D537

 

Ckt 2

 

 

 

06D818

 

 

06D328

 

 

 

06D328

 

 

06D537

 

Number of Refrigerant Circuits

 

 

2

 

 

 

2

 

 

 

 

2

 

 

 

2

 

Oil (oz) (Ckt 1, Ckt 2)

 

 

115, 88

 

 

 

115 ea.

 

 

 

115 ea.

 

 

115 ea.

 

REFRIGERANT TYPE

 

 

 

 

 

 

 

 

 

 

R-22

 

 

 

 

 

 

Operating Charge (lb-oz)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Circuit 1**

 

 

 

25-0

 

 

 

25-0

 

 

 

 

25-0

 

 

 

25-0

 

Circuit 2

 

 

 

31-0

 

 

 

25-0

 

 

 

 

25-0

 

 

 

25-0

 

CONDENSER COIL

 

 

 

 

 

Cross-Hatched 3¤89 Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins

 

 

Quantity

 

 

 

1

 

 

 

1

 

 

 

 

1

 

 

 

1

 

Rows...Fins/in.

 

 

 

4...15

 

 

 

4...15

 

 

 

 

4...15

 

 

 

4...15

 

Total Face Area (sq ft)

 

 

33.3

 

 

 

33.3

 

 

 

 

33.3

 

 

 

33.3

 

CONDENSER FAN

 

 

 

 

 

 

 

 

 

Propeller Type

 

 

 

 

 

 

Nominal Cfm

 

 

 

13,420

 

 

 

13,420

 

 

 

 

13,420

 

 

 

13,420

 

Quantity...Diameter (in.)

 

 

2...30

 

 

 

2...30

 

 

 

 

2...30

 

 

 

2...30

 

Motor Hp (1075 Rpm)

 

 

1

 

 

 

1

 

 

 

 

1

 

 

 

1

 

EVAPORATOR COIL

 

 

 

 

 

 

Cross-Hatched 3¤89 Copper Tubes, Aluminum Plate Fins, Intertwined Circuits

 

 

Rows...Fins/in.

 

 

 

4...15

 

 

 

4...15

 

 

 

 

4...15

 

 

 

4...15

 

Total Face Area (sq ft)

 

 

31.7

 

 

 

31.7

 

 

 

 

31.7

 

 

 

31.7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EVAPORATOR FAN

 

 

 

 

 

 

 

 

 

Centrifugal Type

 

 

 

 

 

 

Quantity...Size (in.)

 

 

 

2...20x15

 

 

2...20x15

 

 

 

2...20x15

 

 

2...20x15

 

Type Drive

 

 

 

Belt

 

 

Belt

 

 

 

Belt

 

 

Belt

 

Nominal Cfm

 

 

 

8,000

 

 

 

10,000

 

 

 

 

11,000

 

 

 

12,000

 

Motor Hp

 

 

5

10²²

 

15

7.5

10²²

 

15

 

10

15²²

 

20

10

15²²

20

Motor Frame Size (Standard)

 

S184T

S215T

 

D254T

S213T

S215T

 

D254T

 

S215T

D254T

 

S256T

S215T

D254T

S256T

(High Efficiency)

 

S184T

S215T

 

S254T

S213T

S215T

 

S254T

 

S215T

S254T

 

S256T

S215T

S254T

S256T

Motor Bearing Type

 

 

 

Ball

 

 

 

Ball

 

 

 

 

Ball

 

 

 

Ball

 

Maximum Allowable Rpm

 

 

1200

 

 

 

1200

 

 

 

 

1200

 

 

 

1200

 

Motor Pulley Pitch Diameter

 

4.8

4.4

 

5.7

5.4

6.1

 

5.5

 

4.4

4.9

 

5.9

4.4

5.7

5.9

Nominal Motor Shaft Diameter (in.)

11¤8

13¤8

 

15¤8

13¤8

13¤8

 

15¤8

 

13¤8

15¤8

 

15¤8

13¤8

15¤8

15¤8

Fan Pulley Pitch Diameter (in.)

 

12.4

8.6

 

9.1

12.4

11.1

 

8.7

 

9.4

8.1

 

8.7

9.0

9.1

8.7

Nominal Fan Shaft Diameter (in.)

 

115¤16

 

 

 

115¤16

 

 

 

 

115¤16

 

 

 

115¤16

 

Belt, Quantity...Type

 

 

1...BX59

2...BX51

2...5VX530

1...BX59

1...5VX590

 

2...5VX530

2...BX52

2...5VX500

2...5VX530

2...BX51

2...5VX530

2...5VX530

Belt, Length (in.)

 

 

62

54

 

53

62

59

 

53

 

55

50

 

53

54

53

53

Pulley Center Line Distance (in.)

16.0-18.7

15.6-18.4

15.0-17.9

15.6

-18.4

 

15.0-17.9

15.6-18.4

15.0-17.9

15.6-18.4

15.0-17.9

Factory Speed Setting (rpm)

 

717

924

 

1096

773

962

 

1106

 

848

1059

 

1187

884

1096

1187

FURNACE SECTION

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Rollout Switch Cutout Temp (F)|

 

225

 

 

 

225

 

 

 

 

225

 

 

 

225

 

Burner Ori®ce Diameter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(in. ...drill size)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Natural Gas

Std

 

 

.111...34

 

 

 

.111...34

 

 

 

 

.111...34

 

 

 

.111...34

 

Liquid Propane

Alt

 

 

.089...43

 

 

 

.089...43

 

 

 

 

.089...43

 

 

 

.089...43

 

Thermostat Heat Anticipator

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Setting (amps)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Stage 1

 

 

 

0.1

 

 

 

0.1

 

 

 

 

0.1

 

 

 

0.1

 

Stage 2

 

 

 

0.1

 

 

 

0.1

 

 

 

 

0.1

 

 

 

0.1

 

Gas Input (Btuh)

Stage 1

Low

 

262,500

 

 

 

262,500

 

 

 

 

262,500

 

 

 

262,500

 

 

 

High

 

394,000

 

 

 

394,000

 

 

 

 

394,000

 

 

 

394,000

 

 

Stage 2

Low

 

350,000

 

 

 

350,000

 

 

 

 

350,000

 

 

 

350,000

 

Efficiency (Steady State) (%)

High

 

525,000

 

 

 

525,000

 

 

 

 

525,000

 

 

 

525,000

 

 

 

82

 

 

 

82

 

 

 

 

82

 

 

 

82

 

Temperature Rise Range

 

 

15-45/35-65

 

 

15-45/35-65

 

 

 

15-45/35-65

 

 

15-45/35-65

 

Manifold Pressure (in. wg)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Natural Gas

Std

 

 

3.5

 

 

 

3.5

 

 

 

 

3.5

 

 

 

3.5

 

Liquid Propane

Alt

 

 

3.5

 

 

 

3.5

 

 

 

 

3.5

 

 

 

3.5

 

Gas Valve Quantity

 

 

 

2

 

 

 

2

 

 

 

 

2

 

 

 

2

 

Field Gas Connection Size

 

 

1.5

 

 

 

1.5

 

 

 

 

1.5

 

 

 

1.5

 

(in.-FPT)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

HIGH-PRESSURE SWITCH (psig)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cutout

 

 

 

426

 

 

 

426

 

 

 

 

426

 

 

 

426

 

Reset (Auto.)

 

 

 

320

 

 

 

320

 

 

 

 

320

 

 

 

320

 

LOW-PRESSURE SWITCH (psig)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Cutout

 

 

 

7

 

 

 

7

 

 

 

 

7

 

 

 

7

 

Reset (Auto.)

 

 

 

22

 

 

 

22

 

 

 

 

22

 

 

 

22

 

OUTDOOR-AIR FILTERS

 

 

 

 

 

 

 

 

8...16 × 25

 

 

 

 

 

 

Quantity...Size (in.)

 

 

 

 

 

 

 

 

 

4...20 × 25

 

 

 

 

 

 

RETURN-AIR FILTERS

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Quantity...Size (in.)

 

 

 

10...20x24x2

 

 

10...20x24x2

 

 

 

10...20x24x2

 

 

10...20x24x2

POWER EXHAUST

 

 

 

 

 

Direct Drive, 3-Speed, Single-Phase Motor (Factory-Wired for High Speed) and Forward-Curved Fan

 

Motor, Quantity...Hp

 

 

 

4...1

 

 

 

4...1

 

 

 

 

4...1

 

 

 

4...1

 

Fan, Diameter... Width (in.)

 

 

11...10

 

 

 

11...10

 

 

 

 

11...10

 

 

 

11...10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEGEND

Al Ð Aluminum

Cu Ð Copper

*Weight of unit does not include variable frequency drive (VFD) barometric relief, or power exhaust. If a VFD is installed, add the VFD weight in the table at right.

²Evaporator coil ®n material/condenser coil ®n material.

**Sizes 024-034: Circuit 1 uses the lower portion of condenser coil, Circuit 2 uses the upper portion. Sizes 038-048: Circuit 1 uses the left condenser coil, Circuit 2 the right. All units have intertwined evaporator coils.

²²Motor and drive shown will deliver approximately 2.5 in. wg net external static. See Table 2 for more information.

\Rollout switch is manual reset.

NOTE: High heat is for 48EJ,EW only.

VFD

 

VFD WEIGHTS (lb)

 

(Hp)

208/230 v

 

460 v

575 v

 

 

 

 

 

5

20

 

22

60

7.5

51

 

37

64

 

 

 

 

 

10

51

 

61

64

 

 

 

 

 

15

61

 

63

109

 

 

 

 

 

20

63

 

111

109

 

 

 

 

 

25

105

 

112

174

 

 

 

 

 

30

172

 

118

180

 

 

 

 

 

10

Table 1 Ð Physical Data (cont)

UNIT 48EJ,EK,EW,EY

 

 

 

038D/E

 

 

044D/E

 

 

048D/E

 

 

NOMINAL CAPACITY (tons)

 

 

35

 

 

40

 

 

45

 

 

OPERATING WEIGHT (lb)*

 

 

 

 

 

 

 

 

 

 

 

Unit

 

 

 

 

 

 

 

 

 

 

 

 

Al/Al² (Lo Heat/Hi Heat)

 

 

4442/4602

 

 

4668/4828

 

 

4955/5115

 

 

Al/Cu² (Lo Heat/Hi Heat)

 

 

4727/4887

 

 

4953/5113

 

 

5335/5495

 

 

Roof Curb (14-in. curb)

 

 

410

 

 

410

 

 

410

 

 

COMPRESSOR

 

 

 

 

 

 

 

 

 

 

 

 

Type Ckt 1

 

 

 

06D537

 

 

06EA250

 

 

06EA265

 

 

Ckt 2

 

 

 

06D537

 

 

06EA250

 

 

06EA250

 

 

Number of Refrigerant Circuits

 

 

2

 

 

2

 

 

2

 

 

Oil (oz) (Ckt 1, Ckt 2)

 

 

115 ea.

 

 

224 ea.

 

 

304, 224

 

 

REFRIGERANT TYPE

 

 

 

 

 

 

R-22

 

 

 

 

 

Operating Charge (lb-oz)

 

 

 

 

 

 

 

 

 

 

 

Circuit 1**

 

 

 

34-0

 

 

35-0

 

 

41-0

 

 

Circuit 2

 

 

 

34-0

 

 

35-0

 

 

41-0

 

 

CONDENSER COIL

 

 

 

Cross-Hatched 3¤89 Copper Tubes, Aluminum Lanced, Aluminum Pre-Coated, or Copper Plate Fins

 

 

Quantity

 

 

 

2

 

 

2

 

1

 

1

Rows...Fins/in.

 

 

 

3...15

 

 

3...15

 

4...15

3...15

Total Face Area (sq ft)

 

 

58.3

 

 

58.3

 

 

66.7

 

 

CONDENSER FAN

 

 

 

 

 

 

Propeller Type

 

 

 

 

 

Nominal Cfm

 

 

 

27,064

 

 

27,064

 

 

27,064

 

 

Quantity...Diameter (in.)

 

 

4...30

 

 

4...30

 

 

4...30

 

 

Motor Hp (1075 Rpm)

 

 

1

 

 

1

 

 

1

 

 

EVAPORATOR COIL

 

 

 

 

Cross-Hatched 3¤89 Copper Tubes, Aluminum Plate Fins, Intertwined Circuits

 

 

 

Rows...Fins/in.

 

 

 

3...15

 

 

3...15

 

 

4...15

 

 

Total Face Area (sq ft)

 

 

34.7

 

 

34.7

 

 

34.7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

EVAPORATOR FAN

 

 

 

 

 

 

Centrifugal Type

 

 

 

 

 

Quantity...Size (in.)

 

 

 

2...20x15

 

 

2...20x15

 

 

2...20x15

 

 

Type Drive

 

 

 

Belt

 

 

Belt

 

 

Belt

 

 

Nominal Cfm

 

 

 

14,000

 

 

16,000

 

 

18,000

 

 

Motor Hp

 

 

10

15²²

20

15

20²²

25

20

25²²

 

30

Motor Frame Size (Standard)

 

S215T

D254T

S256T

D254T

S256T

S284T

S256T

S284T

 

S286T

(High Efficiency)

 

S215T

S254T

S256T

S254T

S256T

S284T

S256T

S284T

 

S286T

Motor Bearing Type

 

 

 

Ball

 

 

Ball

 

 

Ball

 

 

Maximum Allowable Rpm

 

 

1200

 

 

1200

 

 

1200

 

 

Motor Pulley Pitch Diameter

 

6.1

5.3

5.7

5.3

5.7

7.5

6.3

5.9

 

7.5

Nominal Motor Shaft Diameter (in.)

13¤8

15¤8

15¤8

15¤8

15¤8

17¤8

15¤8

17¤8

 

17¤8

Fan Pulley Pitch Diameter (in.)

 

13.7

9.5

9.5

9.5

9.5

11.1

11.1

12.5

 

11.1

Nominal Fan Shaft Diameter (in.)

 

115¤16

 

 

115¤16

 

 

115¤16

 

 

Belt, Quantity...Type

 

 

1...5VX650

2...5VX530

2...5VX550

2...5VX530

2...5VX550

2...5VX590

2...5VX570

2...5VX630

 

2...5VX610

Belt, Length (in.)

 

 

65

53

55

53

55

59

57

63

 

59

Pulley Center Line Distance (in.)

15.6-18.4

15.0-17.9

15.0-17.9

14.6-17.6

15.0-17.9

14.6-17.6

Factory Speed Setting (rpm)

 

779

976

1050

976

1050

1182

993

1134

 

1182

FURNACE SECTION

 

 

 

 

 

 

 

 

 

 

 

 

Rollout Switch Cutout Temp (F)|

 

225

 

 

225

 

 

225

 

 

Burner Ori®ce Diameter

 

 

 

 

 

 

 

 

 

 

 

(in. ...drill size)

 

 

 

 

 

 

 

 

 

 

 

 

Natural Gas

Std

 

 

.120...31

 

 

.120...31

 

 

.120...31

 

 

Liquid Propane

Alt

 

 

.096...41

 

 

.096...41

 

 

.096...41

 

 

Thermostat Heat Anticipator

 

 

 

 

 

 

 

 

 

 

 

Setting (amps)

 

 

 

 

 

 

 

 

 

 

 

 

Stage 1

 

 

 

0.1

 

 

0.1

 

 

0.1

 

 

Stage 2

 

 

 

0.1

 

 

0.1

 

 

0.1

 

 

Gas Input (Btuh)

Stage 1

Low

 

300,000

 

 

300,000

 

 

300,000

 

 

 

 

High

 

600,000

 

 

600,000

 

 

600,000

 

 

 

Stage 2

Low

 

400,000

 

 

400,000

 

 

400,000

 

 

Efficiency (Steady State) (%)

High

 

800,000

 

 

800,000

 

 

800,000

 

 

 

 

82

 

 

82

 

 

82

 

 

Temperature Rise Range

 

 

10-40/30-60

 

 

10-40/30-60

 

 

10-40/30-60

 

 

Manifold Pressure (in. wg)

 

 

 

 

 

 

 

 

 

 

 

Natural Gas

Std

 

 

3.5

 

 

3.5

 

 

3.5

 

 

Liquid Propane

Alt

 

 

3.5

 

 

3.5

 

 

3.5

 

 

Gas Valve Quantity

 

 

 

2

 

 

2

 

 

2

 

 

Field Gas Connection Size (in.-FPT)

 

1.5

 

 

1.5

 

 

1.5

 

 

HIGH-PRESSURE SWITCH (psig)

 

 

 

 

 

 

 

 

 

 

 

Cutout

 

 

 

426

 

 

426

 

 

426

 

 

Reset (Auto.)

 

 

 

320

 

 

320

 

 

320

 

 

LOW-PRESSURE SWITCH (psig)

 

 

 

 

 

 

 

 

 

 

 

Cutout

 

 

 

7

 

 

7

 

 

7

 

 

Reset (Auto.)

 

 

 

22

 

 

22

 

 

22

 

 

OUTDOOR-AIR FILTERS

 

 

 

 

 

8...16 × 25

 

 

 

 

 

Quantity...Size (in.)

 

 

 

 

 

 

4...20 × 25

 

 

 

 

 

RETURN-AIR FILTERS

 

 

 

 

 

 

 

 

 

 

 

 

Quantity...Size (in.)

 

 

 

10...20x24x2

 

 

10...20x24x2

 

 

10...20x24x2

 

 

POWER EXHAUST

 

 

 

Direct Drive, 3-Speed, Single-Phase motor (Factory-Wired for High Speed) and Forward Curved Fan

 

 

Motor, Quantity...Hp

 

 

 

4...1

 

 

4...1

 

 

4...1

 

 

Fan, Diameter... Width (in.)

 

 

11...10

 

 

11...10

 

 

11...10

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEGEND

Al Ð Aluminum

Cu Ð Copper

*Weight of unit does not include variable frequency drive (VFD) barometric relief, or power exhaust. If a VFD is installed, add the VFD weight in the table at right.

²Evaporator coil ®n material/condenser coil ®n material.

**Sizes 024-034: Circuit 1 uses the lower portion of condenser coil, Circuit 2 uses the upper portion. Sizes 038-048: Circuit 1 uses the left condenser coil, Circuit 2 the right. All units have intertwined evaporator coils.

²²Motor and drive shown will deliver approximately 2.5 in. wg net external static. See Table 2 for more information.

\Rollout switch is manual reset.

NOTE: High heat is for 48EJ,EW only.

VFD

 

VFD WEIGHTS (lb)

 

(Hp)

208/230 v

 

460 v

575 v

 

 

 

 

 

5

20

 

22

60

7.5

51

 

37

64

 

 

 

 

 

10

51

 

61

64

 

 

 

 

 

15

61

 

63

109

 

 

 

 

 

20

63

 

111

109

 

 

 

 

 

25

105

 

112

174

 

 

 

 

 

30

172

 

118

180

 

 

 

 

 

11

Table 2 Ð Evaporator Fan Motor Data (Units with Starting Serial Numbers 4197 and Later)

 

 

MOTOR

FAN

 

MOTOR

 

 

FAN

 

 

 

BELT

UNIT

 

 

SHEAVE

BUSHING

 

SHEAVE

BUSHING

 

OUTSIDE

MOTOR

SHAFT

SHAFT

MOTOR

FAN

BELT

TENSION

SIZE

PITCH

DIAMETER

PITCH

DIAMETER

BELT

HP

DIA.

SPEED

SHEAVE

SHEAVE

(QUANTITY)

(Lb at

48E

DIAMETER

(in.)

DIAMETER

(in.)

LENGTH

 

(in.)

(rpm)

 

 

 

.24 in.)

 

 

 

(in.)

 

 

(in.)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

024

5

1.12

717

BK55

4.8

None-1.125

1B5V124

12.4

B-1.9375

BX59

62

5.10

10

1.38

924

2BK50

4.4

None-1.375

2B5V86

8.6

B-1.9375

(2) BX51

54

5.21

 

15

1.62

1096

2B5V56

5.7

B-1.625

2B5V90

9.1

B-1.9375

(2) 5VX530

53

6.00

028

7.5

1.38

773

BK60H

5.4

H-1.375

1B5V124

12.4

B-1.9375

BX59

62

6.48

10

1.38

962

1B5V60

6.1

H-1.375

1B5V110

11.1

B-1.9375

5VX590

59

7.37

 

15

1.62

1106

2B5V54

5.5

B-1.625

2B5V86

8.7

B-1.9375

(2) 5VX530

53

6.12

030

10

1.38

848

2BK50

4.4

None-1.375

2B5V94

9.4

B-1.9375

(2) BX52

55

5.27

15

1.62

1059

2B5V48

4.9

B-1.625

2B5V80

8.1

B-1.9375

(2) 5VX500

50

6.63

 

20

1.62

1187

2B5V58

5.9

B-1.625

2B5V86

8.7

B-1.9375

(2) 5VX530

53

7.31

034

10

1.38

884

2BK50

4.4

H-1.375

2B5V90

9.0

B-1.9375

(2) BX51

54

5.24

15

1.62

1096

2B5V56

5.7

B-1.625

2B5V90

9.1

B-1.9375

(2) 5VX530

53

6.00

 

20

1.62

1187

2B5V58

5.9

B-1.625

2B5V86

8.7

B-1.9375

(2) 5VX530

53

7.31

038

10

1.38

779

1B5V60

6.1

None-1.375

1B5V136

13.7

B-1.9375

5VX650

65

7.62

15

1.62

976

2B5V52

5.3

B-1.625

2B5V94

9.5

B-1.9375

(2) 5VX530

53

6.37

 

20

1.62

1050

2B5V56

5.7

B-1.625

2B5V94

9.5

B-1.9375

(2) 5VX550

55

7.60

044

15

1.62

976

2B5V52

5.3

B-1.625

2B5V94

9.5

B-1.9375

(2) 5VX530

53

6.37

20

1.62

1050

2B5V56

5.7

B-1.625

2B5V94

9.5

B-1.9375

(2) 5VX550

55

7.60

 

25

1.88

1182

2B5V74

7.5

B-1.875

2B5V110

11.1

B-1.9375

(2) 5VX590

59

7.60

048

20

1.62

993

2B5V62

6.3

B-1.625

2B5V110

11.1

B-1.9375

(2) 5VX570

57

7.22

25

1.88

1134

2B5V80

5.9

B-1.875

2B5V124

12.5

B-1.9375

(2) 5VX630

63

7.36

 

30

1.88

1182

2B5V74

7.5

B-1.875

2B5V110

11.1

B-1.9375

(2) 5VX590

59

9.07

NOTE: Motor shaft speed is 1750 rpm. The fan shaft diameter is 115¤16 inches.

Step 4 Ð Install Flue Hood Ð Flue hood is shipped inside gas section of unit. To install, secure ¯ue hood to access panel. See Fig. 10.

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

Fig. 8 Ð Air Distribution Ð Thru-the-Bottom

Fig. 9 Ð Air Distribution Ð Thru-the-Side

Fig. 10 Ð Flue Hood Location

12

Step 5 Ð Trap Condensate Drain Ð See Fig. 3-6 for drain location. Condensate drain is open to atmosphere and must be trapped. Install a trapped drain at the drain location. A trap at least 4-in. deep must be used. See Fig. 12. Trap must be installed to prevent freeze-up.

Condensate pans are sloped so that water will completely drain from the condensate pan to comply with indoor air quality guidelines. The condensate drain pan is ®tted with a 1-in. FPT coupling.

Step 6 Ð Install Gas Piping Ð Unit is equipped for use with natural gas. Installation must conform with local building codes or, in the absence of local codes, with the National Fuel Gas Code, ANSI Z223.1.

Install manual gas shutoff valve with a 1¤8-in. NPT pressure tap for test gage connection at unit. Field gas piping must include sediment trap and union. See Fig. 13. An 1¤8-in. 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.

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

Size gas-supply piping for 0.5-in. wg maximum pressure drop. Do not use supply pipe smaller than unit gas connection.

Step 7 Ð Controls Options Ð The control options that the units can provide are based on the following parameters: CV (constant volume) or VAV (variable air volume) operation; stand-alone unit with ®eld-supplied sensors installed (CV or VAV); as a system via Carrier Comfort System (TEMP or VVTt); optional electronic expansion board installed (CV or VAV); linked to the Carrier Comfort Network; and availability of a computer and software (ComfortWorks™ Building Supervisor, and Service Tool) or LID-2B accessory installed to access the base control board. See Table 3.

NOTE: Access to the base control board allows unit occupancy schedules, unit timeclock, and various set points to be changed from their factory-de®ned default settings.

All units are equipped with a supply air thermistor (SAT) located in the supply fan discharge and an outdoor air thermistor (OAT) located in the outdoor air hood. Variable air volume units are supplied with a return air thermistor (RAT) located on the return air damper support.

CONSTANT VOLUME APPLICATIONS Ð The units, as shipped, are operable as stand-alone units, using either a standard (mechanical or electronic) 2-stage heat, 2-stage cool thermostat, or with an electronic room sensor and a timeclock to establish unit start and stop times.

With a standard thermostat (programmable is optional), heating and cooling operation is set by space temperature.

With a space sensor and timeclock, the machine will operate at default values unless they are changed using appropriate input devices. The space sensor senses space temperature and may be equipped with a timed override feature, which allows unit operation during unoccupied periods.

Fig. 11 Ð Combustion Fan Housing Location

Fig. 12 Ð Condensate Drain Trap Piping Details (Typical Roof Curb or Slab Mount Shown)

Fig. 13 Ð Field Gas Piping

The space sensors may be used in multiples of 4 or 9 to achieve space temperature averaging. The use of a space sensor also allows the unit to be turned on and off from a remote signal.

Features with Thermostat Control of Unit

·two-stage heating

·two-stage cooling

·control of unit using Y1, Y2, W1, W2, and G thermostat inputs

·control of the indoor fan

·outdoor-air temperature/supply-air temperature monitoring

·control of an outdoor air condenser fan based on outdoorair temperature

13

Table 3 Ð Controls Options and Con®gurations (Non-Thermostat Applications)

UNIT CONFIGURATION

DEFAULT COOLING

DEFAULT HEATING

CV or VAV Unit with SPT Sensor

Unoccupied Cooling Ð 90 F (SPT)

Unoccupied Heating Ð 55 F (SPT)

Occupied Cooling

Ð NA

Occupied Heating

Ð NA

 

CV Unit with SPT Sensor and Remote

Unoccupied Cooling Ð 90 F (SPT)

Unoccupied Heating Ð 55 F (SPT)

Start/Stop Switch

Occupied Cooling

Ð 78 F (SPT)

Occupied Heating

Ð 68 F (SPT)

VAV Unit Remote Start/Stop Switch Only

Unoccupied Cooling Ð 90 F (RAT)

Unoccupied Heating Ð 55 F (RAT)

Occupied Cooling

Ð 55 F (SAT)

Occupied Heating

Ð 68 F (RAT)*

 

VAV Unit with SPT Sensor and Remote

Unoccupied Cooling Ð 90 F (SPT)

Unoccupied Heating Ð 55 F (SPT)

Start/Stop Switch

Occupied Cooling

Ð 55 F (SAT)

Occupied Heating

Ð 68 F (RAT)*

 

LEGEND

CV

Ð Constant Volume

NA

Ð Not Available

RAT Ð Return-Air Temperature

SAT Ð Supply-Air Temperature

SPT Ð Space Temperature

VAV

Ð Variable Air Volume

*With DIP Switch No. 5 con®gured to OPEN (Occupied Heat Enabled).

NOTE: Space temperature sensor and remote start/stop switch are ®eld-supplied.

·control of modulating economizer damper to provide free cooling when outdoor conditions are suitable, using supply-air temperature as a control point

·control of the economizer damper and indoor fan to obtain unoccupied free cooling

·provide power exhaust output to an external power exhaust controller

·support a ®eld test for ®eld checkout

·control of 2 stages of CV power exhaust

·compressor Time Guardt (power up, minimum off and on times)

·compressor lockout during low supply-air temperature

Additional features are provided by accessing the standard unit control board via software with a computer. These features are:

·electronic expansion board features (if installed)

·control board diagnostics

·ability to change supply air set point (economizer control)

·ability to change high outdoor temperature lockout set point (economizer control)

·ability to change power exhaust set points

NOTE: A CV unit without a thermostat requires a ®eldsupplied sensor for operation.

Features with Sensor Control of Unit (Stand-Alone Applications Ð Unit control is limited to CV unoccupied default set points, 90 F for cooling, 55 F for heating. There are 2 sensor options available:

·T-55 sensor will monitor room temperature and provide unoccupied override capability (1 hour)

·T-56 sensor will monitor room temperature, provide unoccupied override capability (1 hour), and provide a temperature offset of 5° F.

Standard features are:

·support of remote occupied/unoccupied input to start and stop the unit

·cooling capacity control of 3 stages using economizer and 2 compressors to maintain space temperature to an occupied or unoccupied set point

·enable heating or cooling during unoccupied periods as required to maintain space temperature within the unoccupied set points

·adjustment of space temperature set points of ±5° F when using a T-56 sensor

Additional features with sensor control of unit (with computer access) are:

·365 day timeclock with backup (supports minute, hour, day of week, date, month, and year)

·daylight savings time function

·occupancy control with 8 periods for unit operation

·holiday table containing up to 18 holiday schedules

·ability to initiate timed override from T-55 or T-56 sensors for a timed period of 1 to 4 hours

·ability to use multiple space temperature sensors to average the space temperature

·temperature compensated start to calculate early start times before occupancy

·access to the Display, Maintenance, Con®guration, Service, and Set Point data tables through network software

When the unit is equipped with a ®eld-supplied space temperature sensor and a remote contact closure (remote start/ stop) on the base control board, the occupied default set points will monitor unit operation. The occupied default set points are 78 F cooling and 68 F heating. See Fig. 14 for remote start/stop wiring.

NOTE: For units with a ®eld-supplied space temperature sesor which have not had the base unit control board accessed via software to set an occupancy schedule, the remote start/ stop closure will allow the unit to operate in the precon®gured occupied default set points (based on return-air temperature) of 78 F cooling and 68 F heating. Without this feature, the unit will control to the unoccupied default set points of 90 F cooling and 55 F heating.

An electronic expansion board may be ®eld-installed to provide the following features:

·control of modulating economizer damper to maintain indoor air quality (IAQ) when outdoor conditions are suitable

NOTE: The IAQ sensor must be set for current output (4 to 20 mA), not voltage output. Ensure the jumper on the sensor is in the upper position. See Fig. 15.

·provide discrete inputs for fan status, ®lter status, ®eldapplied status, and demand limit

·provide an output for the external alarm light indicator

·provide power exhaust ®re outputs for direct control of modulated power exhaust stages during ®re or smoke modes

·control of smoke control modes including evacuation, smoke purge, pressurization, and ®re shutdown (modulating power exhaust required)

When the unit is connected to the CCN (Carrier Comfort Network), the following expansion board features can be utilized:

·perform Demand Limit functions based on CCN loadshed commands or the state of the discrete input

·alarm monitoring of all key parameters

·CCN protocol

·provides CCN IAQ participation

See Carrier TEMP or VVTt (Variable Volume and Temperature) literature for complete TEMP (single zone) or VVT (multi-zone) application information.

14

REMOTE

START/STOP

SWITCH

(FIELD-SUPPLIED)

R

Y1

Y2

W1

W2

G

C

X

CONTROL

BOX

LEGEND

Field Supplied Wiring

Fig. 14 Ð Field Control Remote Start/Stop

JUMPER CONNECTION

FOR VOLTAGE OUTPUT

JUMPER CONNECTION

FOR CURRENT OUTPUT

Fig. 15 Ð Indoor Air Quality Sensor Con®guration

Features with Sensor Control of Unit (Network Applications) Ð The base control board provides, as standard, a connection for use with a Carrier VVT system and can also be integrated into a Carrier Comfort Network.

When the unit is accessed via a PC equipped with ComfortWorks™, Building Supervisor, or Service Tool software, or accessory LID-2B, the following features can be accessed:

·on-board timeclock can be programmed

·occupancy schedules can be programmed

·unit set points can be changed

·alarms can be monitored

This access is available on the base control board via a RJ-11 phone jack or a 3-wire connection to the communication bus. See Fig. 16. The timeclock has a 10-hour minimum back-up time to provide for unit power off for servicing unit or during unexpected power outages. For complete Carrier Comfort System (CCS) or Carrier Comfort Network (CCN) features and bene®ts, refer to the product literature.

VARIABLE AIR VOLUME (VAV) APPLICATIONS

Features with Stand-Alone Applications Ð The units, as shipped, are operable as stand-alone units with the addition of a timeclock to establish unit start and stop times.

Heating and cooling in both on and off modes is controlled to default values by the base unit control. Set points may be changed with appropriate input devices.

The control has an on-board occupancy schedule which can be set using an input device and eliminates the need for an external timeclock.

During both the on and off periods, cooling operation is controlled to the supply air setting and heating is controlled to the return air setting (or to the optional space temperature sensor). During the on period, the supply fan runs continuously. During the off period, the supply fan will be activated if the return air sensor is outside of the set points and will run log enough to accurately sample the space temperature. The supply fan will then continue to run until any heating or cooling load is satis®ed, at which point it will turn off.

The use of a space sensor will allow for supply air reset to conserve energy and maintain comfort. If equipped with an override feature, the sensor will allow operation during the off period for a ®xed length of time.

Base unit control supports a Heat Interlock Relay (®eld supplied) to fully open the VAV terminal devices during heating operation.

Standard features of a VAV unit with a remote start/stop switch are:

·control board diagnostics

·control of an outdoor condenser fan based upon outdoor air temperature

·control of modulating economizer to provide free cooling when outdoor conditions are suitable, using supply-air temperature as a set point

·support of remote occupied/unoccupied input to start or stop the unit

·provide power exhaust output to an external power exhaust controller

·support supply-air temperature reset to offset supply air set point

·support a ®eld test for ®eld check out

·support linkage to DAV systems

·cooling capacity control of up to 6 stages plus economizer with compressors and unloaders to maintain supply air temperature set point during occupied periods

·control of one stage of heat to maintain return-air temperature at heating set point during occupied periods

·provide a variable frequency drive high voltage relay output to enable VFD

·control of heat interlock relay

·compressor Time Guard override (power up, minimum off and on times)

With the addition of a remote start/stop switch heating or cooling is enabled during unoccupied periods as required to maintain space temperature to within unoccupied set points.

Additional features may be provided with Electronic Access to Unit Control Board. These features are:

·additional control board diagnostics

·electronic expansion board features (if installed)

·control of the economizer damper and indoor fan to obtain unoccupied free cooling

·365-day timeclock with backup (supports minute, hour, day, month, and year)

·holiday table containing up to 18 holiday schedules

·occupancy control with 8 periods for unit operation

·support a set of display, maintenance, con®guration, service, and set point data tables for interface with Building Supervisor, ComfortWorks, or Service Tool software software or accessory LID-2B

15

When a VAV unit with a space temperature sensor is accessed via a computer, the following additional features are available:

·ability to initiate timed override from T-55 sensors

·temperature compensated start to calculate early start time before occupancy

·provide space temperature reset to reset the supply air set point upward when the temperature falls below the occupied cooling set point

An electronic expansion board may be ®eld-installed to provide the following features:

·fan status

·®lter status

·®eld-applied status

·demand limiting

·IAQ Sensor

·OAQ Sensor

·alarm light

·®re unit shutdown

·®re pressurization

·®re evacuation

·®re smoke purge

When the unit is connected to the CCN (Carrier Comfort Network), the following expansion board features can be utilized:

·CCN IAQ (indoor air quality) participation

·CCN OAQ (outdoor air quality) participation

·CCN demand limit participation

·modulated power exhaust override

·ability to use multiple space temperature sensors (multiples of 4 and 9 only) to average space temperature (DAV only)

A ®eld-supplied T-55 space temperature sensor can be added to monitor room temperature and provide unoccupied override capability (1 hour).

When the unit is equipped with a ®eld-supplied space temperature sensor and a remote contact closure (remote start/ stop) the occupied default set points will monitor unit operation. The occupied default set points are 55 F (supply air) cooling and 68 F (return air temperature) heating. See Fig. 14 for remote start/stop wiring.

NOTE: For units without a space temperature sensor and which have not had the base unit control board accessed via software to set an occupancy schedule, the remote start/stop closure will allow the unit to operate in the pre-con®gured occupied default set points of 55 F (supply-air temperature) cooling and 68 F (return-air temperature) heating. Without an occupancy schedule, the unit will control to the unoccupied default set points of 90 F (return air) cooling and 55 F (return air) heating.

Features with Network Applications Ð The base control board provides, as standard, a connection for use with a Carrier Comfort System and can also be integrated into a Carrier Comfort Network. When the unit is accessed via a PC equipped with ComfortWorks™, Building Supervisor, or Service Tool software or LID-2B accessory, the following features can be accessed:

·on-board timeclock can be programmed

·occupancy schedules can be programmed

·unit set points can be changed

·alarms can be monitored

This access is available on the base control board via a RJ-11 phone jack or a 3-wire connection to the communication bus. See Fig. 16. The internal timeclock has a 10-hour minimum back-up time to provide for unit power off for servicing unit or during unexpected power outages. For complete Carrier Comfort System (CCS) or Carrier Comfort Network (CCN) features and bene®ts, refer to the product literature.

Step 8 Ð Make Electrical Connections

POWER WIRING Ð Units are factory wired for the voltage shown on the unit nameplate.

When installing units, provide a disconnect per NEC (National Electrical Code) of adequate size (MOCP [maximum overcurrent protection] of unit is on the informative plate). All ®eld wiring must comply with NEC and all local codes. Size wire based on MCA (minimum circuit amps) on the unit informative plate. See Fig. 17 for power wiring connections to the unit power terminal block and equipment ground.

The main power terminal block is suitable for use with aluminum or copper wire. See Fig. 17. Units have circuit breakers for compressors, fan motors, and control circuit. If required by local codes, provide an additional disconnect switch. Whenever external electrical sources are used, unit must be electrically grounded in accordance with local codes, or in absence of local codes, with NEC, ANSI C1-latest year.

All ®eld wiring must comply with NEC and local code requirements.

FIELD POWER SUPPLY Ð Unit is factory wired for voltage shown on unit nameplate. See Table 4 for electrical 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 ®eld 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. (024-034) or 3-in. (038-048) knockouts for the ®eld power wiring. See Fig. 3-6. If control wiring is to be brought in through the side of unit, a 7¤8-in. diameter hole is provided in the condenser side post next to the control box.

If disconnect box is mounted to corner post, be careful not to drill any screws into the condenser coil.

Routing Through Bottom of Unit Ð If wiring is brought in through bottom of unit, use ®eld-supplied watertight conduit to run power wiring from basepan out through bottom 31¤2-in. hole to the disconnect box and back into unit to the main control box.

Use strain relief going into control box through 21¤2-in. diameter hole provided. After wires are in unit control box, connect to power terminal block (see Power Wiring section above).

Low-voltage wiring must be run in watertight conduit from the basepan to control box and through 7¤8-in. diameter hole provided in bottom of unit control box. Field-supplied strain 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 page 21).

Install conduit connector in unit basepan as shown in Fig. 3-6. Route power and ground lines through connector to terminal connections in unit control box as shown on unit wiring diagram and Fig. 17.

Routing Through Side of Unit Ð Route power wiring in ®eldsupplied watertight conduit into unit through 21¤2-in. hole. See Fig. 17.

Use ®eld-supplied strain relief going into control box through 21¤2-in. diameter hole provided. After wires are in unit control box, connect to power terminal block (see Power Wiring section on this page).

Bring low-voltage control wiring through factory-drilled 7¤8-in. diameter hole in condenser side post. Use strain relief going into 7¤8-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 on page 21).

16

17

 

 

LEGEND

 

 

CCN

Ð Carrier Comfort Network

N.O. Ð Normally Open

*Where X is the unit control software version number.

COM Ð Common

R

Ð Relay

 

D

Ð Diode

SIO

Ð Serial Input/Output

 

LED

Ð Light-Emitting Diode

SW

Ð Switch

 

N.C.

Ð Normally Closed

T

Ð Terminal

 

Fig. 16 Ð Control Board Diagram

Table 4 Ð Electrical Data

UNIT

NOMNAL

VOLTAGE

COMPRESSOR

 

OFM

 

 

IFM

POWER

COMBUSTION

 

POWER SUPPLY

RANGE

No. 1

No. 2

 

 

 

EXHAUST

FAN MOTOR

 

SIZE

VOLTAGE

 

 

 

 

 

 

 

 

 

 

 

48E

(3 Ph 60 Hz)

Min

Max

RLA

LRA

RLA

LRA

Qty

Hp

 

FLA

Hp

 

FLA

FLA

LRA

FLA

 

MCA

 

MOCP*

 

 

 

(ea)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

16.7/

Ð

Ð

0.96

 

101.8/100.3

 

125/125

 

 

 

 

 

 

 

 

 

 

 

 

 

15.2

23.6

41.6

0.96

 

125.4/123.9

 

150/150

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

187

254

39.1

228

25.6

160

2

1

 

5.3

10

 

30.8/

Ð

Ð

0.96

 

115.9/113.1

 

150/150

 

 

 

28.0

23.6

41.6

0.96

 

139.5/136.7

 

175/175

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

46.2/

Ð

Ð

0.96

 

131.3/127.1

 

150/150

 

 

 

 

 

 

 

 

 

 

 

 

 

42.0

23.6

41.6

0.96

 

154.9/150.7

 

175/175

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

7.6

Ð

Ð

0.50

 

49.4

 

60

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

62.0

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

024

460

414

508

19.9

114

11.5

80

2

1

 

2.7

10

 

14.0

Ð

Ð

0.50

 

55.8

 

70

 

 

12.6

23.6

0.50

 

68.4

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

21.0

Ð

Ð

0.50

 

62.8

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

75.4

 

90

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

5

 

6.1

Ð

Ð

0.50

 

40.5

 

50

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

53.1

 

60

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

518

632

16.0

91

9.6

64

2

1

 

2.4

10

 

11.0

Ð

Ð

0.50

 

45.4

 

60

 

 

 

12.6

23.6

0.50

 

58.0

 

70

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

17.0

Ð

Ð

0.50

 

51.4

 

60

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

64.0

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7.5

 

24.2/

Ð

Ð

0.96

 

122.8/120.6

 

150/150

 

 

 

 

 

 

 

 

 

 

 

 

 

22.0

23.6

41.6

0.96

 

146.4/144.2

 

175/175

 

208/230

187

254

39.1

228

39.1

228

2

1

 

5.3

10

 

30.8/

Ð

Ð

0.96

 

129.4/126.6

 

150/150

 

 

 

28.0

23.6

41.6

0.96

 

153.0/150.2

 

175/175

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

46.2/

Ð

Ð

0.96

 

144.8/140.6

 

175/175

 

 

 

 

 

 

 

 

 

 

 

 

 

42.0

23.6

41.6

0.96

 

168.4/164.2

 

200/200

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7.5

 

11.0

Ð

Ð

0.50

 

61.2

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

73.8

 

90

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

028

460

414

508

19.9

114

19.9

114

2

1

 

2.7

10

 

14.0

Ð

Ð

0.50

 

64.2

 

80

 

 

12.6

23.6

0.50

 

76.8

 

90

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

21.0

Ð

Ð

0.50

 

71.2

 

90

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

83.8

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7.5

 

9.0

Ð

Ð

0.50

 

49.8

 

60

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

62.4

 

70

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

518

632

16.0

91

16.0

91

2

1

 

2.4

10

 

11.0

Ð

Ð

0.50

 

51.8

 

60

 

 

 

12.6

23.6

0.50

 

64.4

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

17.0

Ð

Ð

0.50

 

57.8

 

70

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

70.4

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

30.8/

Ð

Ð

0.96

 

151.9/149.1

 

200/200

 

 

 

 

 

 

 

 

 

 

 

 

 

28.0

23.6

41.6

0.96

 

175.5/172.7

 

225/225

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

187

254

57.1

266

39.1

228

2

1

 

5.3

15

 

46.2/

Ð

Ð

0.96

 

167.3/163.1

 

225/225

 

 

 

42.0

23.6

41.6

0.96

 

190.9/186.7

 

225/225

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

59.4/

Ð

Ð

0.96

 

180.5/175.1

 

225/225

 

 

 

 

 

 

 

 

 

 

 

 

 

54.0

23.6

41.6

0.96

 

204.1/198.7

 

250/250

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

14.0

Ð

Ð

0.50

 

71.3

 

90

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

83.9

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

030

460

414

508

25.6

120

19.9

114

2

1

 

2.7

15

 

21.0

Ð

Ð

0.50

 

78.3

 

100

 

 

12.6

23.6

0.50

 

90.9

 

110

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

27.0

Ð

Ð

0.50

 

84.3

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

96.9

 

110

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

11.0

Ð

Ð

0.50

 

57.4

 

70

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

70.0

 

90

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

518

632

20.5

96

16.0

91

2

1

 

2.4

15

 

17.0

Ð

Ð

0.50

 

63.4

 

80

 

 

 

12.6

23.6

0.50

 

76.0

 

90

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

22.0

Ð

Ð

0.50

 

68.4

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

81.0

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

See Legend and Notes on page 19.

18

Table 4 Ð Electrical Data (cont)

UNIT

NOMINAL

VOLTAGE

COMPRESSOR

 

OFM

 

 

IFM

POWER

COMBUSTION

POWER SUPPLY

RANGE

No. 1

No. 2

 

 

 

EXHAUST

FAN MOTOR

 

SIZE

VOLTAGE

 

 

 

 

 

 

 

 

 

 

 

48E

(3 Ph 60 Hz)

Min

Max

RLA

LRA

RLA

LRA

Qty

Hp

 

FLA

Hp

 

FLA

FLA

LRA

FLA

 

MCA

 

MOCP*

 

 

 

(ea)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

30.8/

Ð

Ð

0.96

 

169.9/167.1

 

225/200

 

 

 

 

 

 

 

 

 

 

 

 

 

28.0

23.6

41.6

0.96

 

193.5/190.7

250/225

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

187

254

57.1

266

57.1

266

2

1

 

5.3

15

 

46.2/

Ð

Ð

0.96

 

185.3/181.1

 

225/225

 

 

 

42.0

23.6

41.6

0.96

 

208.9/204.7

250/250

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

59.4/

Ð

Ð

0.96

 

198.5/193.1

 

250/250

 

 

 

 

 

 

 

 

 

 

 

 

 

54.0

23.6

41.6

0.96

 

222.1/216.7

275/250

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

14.0

Ð

Ð

0.50

 

77.0

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

89.6

 

110

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

034

460

414

508

25.6

120

25.6

120

2

1

 

2.7

15

 

21.0

Ð

Ð

0.50

 

84.0

 

100

 

 

12.6

23.6

0.50

 

96.6

 

110

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

27.0

Ð

Ð

0.50

 

90.0

 

110

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

102.6

 

125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

11.0

Ð

Ð

0.50

 

61.9

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

74.5

 

90

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

518

632

20.5

96

20.5

96

2

1

 

2.4

15

 

17.0

Ð

Ð

0.50

 

67.9

 

80

 

 

 

12.6

23.6

0.50

 

80.5

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

22.0

Ð

Ð

0.50

 

72.9

 

90

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

85.5

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

30.8/

Ð

Ð

0.96

 

180.5/177.7

 

225/225

 

 

 

 

 

 

 

 

 

 

 

 

 

28.0

23.6

41.6

0.96

 

204.1/201.3

250/250

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

187

254

57.1

266

57.1

266

4

1

 

5.3

15

 

46.2/

Ð

Ð

0.96

 

195.9/191.7

 

250/225

 

 

 

42.0

23.6

41.6

0.96

 

219.5/215.3

275/250

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

59.4/

Ð

Ð

0.96

 

209.1/203.7

 

250/250

 

 

 

 

 

 

 

 

 

 

 

 

 

54.0

23.6

41.6

0.96

 

232.7/227.3

275/275

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

14.0

Ð

Ð

0.50

 

82.4

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

95.0

 

110

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

038

460

414

508

25.6

120

25.6

120

4

1

 

2.7

15

 

21.0

Ð

Ð

0.50

 

89.4

 

110

 

 

12.6

23.6

0.50

 

102.0

 

125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

27.0

Ð

Ð

0.50

 

95.4

 

110

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

108.0

 

125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10

 

11.0

Ð

Ð

0.50

 

66.7

 

80

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

79.3

 

90

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

518

632

20.5

96

20.5

96

4

1

 

2.4

15

 

17.0

Ð

Ð

0.50

 

72.7

 

90

 

 

 

12.6

23.6

0.50

 

85.3

 

100

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

22.0

Ð

Ð

0.50

 

77.7

 

90

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

90.3

 

110

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEGEND

 

FLA

Ð Full Load Amps

 

HACR

Ð Heating, Air Conditioning and

 

 

Refrigeration

 

IFM

Ð Indoor (Evaporator) Fan Motor

 

LRA

Ð Locked Rotor Amps

 

MCA

Ð Minimum Circuit Amps

 

MOCP Ð Maximum Overcurrent Protection

or

NEC

Ð National Electrical Code

 

OFM

Ð Outdoor (Condenser) Fan Motor

 

RLA

Ð Rated Load Amps

 

*Fuse or HACR circuit breaker.

NOTES:

1.In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.

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 voltage imbalance.

% Voltage Imbalance

= 100 x

max voltage deviation from average voltage

average voltage

 

EXAMPLE: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

452 + 464 + 455

Average Voltage =

3

1371

=

3 = 457

Determine maximum deviation from average voltage. (AB) 457 − 45 2 = 5 v

(BC) 464 − 45 7 = 7 v (AC) 457 − 45 5 = 2 v

Maximum deviation is 7 v.

Determine percent 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%.

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

19

Table 4 Ð Electrical Data (cont)

UNIT

NOMINAL

VOLTAGE

COMPRESSOR

 

OFM

 

 

IFM

POWER

COMBUSTION

 

POWER SUPPLY

RANGE

No. 1

No. 2

 

 

 

EXHAUST

FAN MOTOR

 

SIZE

VOLTAGE

 

 

 

 

 

 

 

 

 

 

 

48E

(3 Ph 60 Hz)

Min

Max

RLA

LRA

RLA

LRA

Qty

Hp

 

FLA

Hp

 

FLA

FLA

LRA

FLA

 

MCA

 

MOCP*

 

 

 

(ea)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

46.2/

Ð

Ð

0.96

 

223.1/218.9

 

275/275

 

 

 

 

 

 

 

 

 

 

 

 

 

42.0

23.6

41.6

0.96

 

246.7/242.5

 

300/300

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

187

254

69.2

345

69.2

345

4

1

 

5.3

20

 

59.4/

Ð

Ð

0.96

 

236.3/230.9

 

300/300

 

 

 

54.0

23.6

41.6

0.96

 

259.9/254.5

 

300/300

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

25

 

74.8/

Ð

Ð

0.96

 

251.7/244.9

 

300/300

 

 

 

 

 

 

 

 

 

 

 

 

 

68.0

23.6

41.6

0.96

 

275.3/268.5

 

300/300

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

21.0

Ð

Ð

0.50

 

96.6

 

125

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

109.2

 

125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

044

460

414

508

28.8

173

28.8

173

4

1

 

2.7

20

 

27.0

Ð

Ð

0.50

 

102.6

 

125

 

 

12.6

23.6

0.50

 

115.2

 

125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

25

 

34.0

Ð

Ð

0.50

 

109.6

 

125

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

122.2

 

150

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

15

 

17.0

Ð

Ð

0.50

 

86.7

 

110

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

99.3

 

125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

518

632

26.7

120

26.7

120

4

1

 

2.4

20

 

22.0

Ð

Ð

0.50

 

91.7

 

110

 

 

 

12.6

23.6

0.50

 

104.3

 

125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

25

 

27.0

Ð

Ð

0.50

 

96.7

 

110

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

109.3

 

125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

59.4/

Ð

Ð

0.96

 

252.4/247.0

 

300/300

 

 

 

 

 

 

 

 

 

 

 

 

 

54.0

23.6

41.6

0.96

 

276.0/270.6

 

300/300

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

208/230

187

254

82.1

446

69.2

345

4

1

 

5.3

25

 

74.8/

Ð

Ð

0.96

 

267.8/261.0

 

300/300

 

 

 

68.0

23.6

41.6

0.96

 

291.4/284.6

 

300/300

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

 

88.0/

Ð

Ð

0.96

 

281.0/273.0

 

300/300

 

 

 

 

 

 

 

 

 

 

 

 

 

80.0

23.6

41.6

0.96

 

304.6/296.6

 

350/300

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

27.0

Ð

Ð

0.50

 

119.5

 

150

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

132.1

 

150

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

048

460

414

508

42.3

223

28.8

173

4

1

 

2.7

25

 

34.0

Ð

Ð

0.50

 

126.5

 

150

 

 

12.6

23.6

0.50

 

139.1

 

175

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

 

40.0

Ð

Ð

0.50

 

132.5

 

150

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

145.1

 

175

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

20

 

22.0

Ð

Ð

0.50

 

101.6

 

125

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

114.2

 

125

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

575

518

632

34.6

164

26.7

120

4

1

 

2.4

25

 

27.0

Ð

Ð

0.50

 

106.6

 

125

 

 

 

12.6

23.6

0.50

 

119.2

 

150

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

30

 

32.0

Ð

Ð

0.50

 

111.6

 

125

 

 

 

 

 

 

 

 

 

 

 

 

 

12.6

23.6

0.50

 

124.2

 

150

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

LEGEND

 

FLA

Ð Full Load Amps

 

HACR

Ð Heating, Air Conditioning and

 

 

Refrigeration

 

IFM

Ð Indoor (Evaporator) Fan Motor

 

LRA

Ð Locked Rotor Amps

 

MCA

Ð Minimum Circuit Amps

 

MOCP Ð Maximum Overcurrent Protection

or

NEC

Ð National Electrical Code

OFM

Ð Outdoor (Condenser) Fan Motor

 

RLA

Ð Rated Load Amps

 

*Fuse or HACR circuit breaker.

NOTES:

1.In compliance with NEC requirements for multimotor and combination load equipment (refer to NEC Articles 430 and 440), the overcurrent protective device for the unit shall be fuse or HACR breaker. Canadian units may be fuse or circuit breaker.

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 voltage imbalance.

% Voltage Imbalance

max voltage deviation from average voltage

= 100 x

average voltage

EXAMPLE: Supply voltage is 460-3-60.

AB = 452 v

BC = 464 v

AC = 455 v

Average Voltage = 452 + 464 + 455

3

= 1371 3

= 457

Determine maximum deviation from average voltage. (AB) 457 − 45 2 = 5 v

(BC) 464 − 45 7 = 7 v (AC) 457 − 45 5 = 2 v

Maximum deviation is 7 v.

Determine percent 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%.

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

20

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