Carrier 48TJE Series, 48TJD Series, 48TJF Series Installation, Start-up And Service Instructions Manual

Download

Page 1

Installation, Start-Up, and

Service Instructions

CONTENTS

Page

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

INSTALLATION .............................1-26

Step 1 — Provide Unit Support ...............1

• ROOF CURB

• SLAB MOUNT

Step 2 — Field Fabricate Ductwork ............2

Step 3 — Install External Trap for

Condensate Drain ..........................2

Step 4 — Rig and Place Unit ..................2

• POSITIONING

Step 5 — Install Flue Hood ...................4

Step 6 — Install Gas Piping ...................4

Step 7 — Make Electrical Connections ........4

• DISCONNECT BOX LOCATION

• FIELD POWER SUPPLY

• FIELD CONTROL WIRING

• HEAT ANTICIPATOR SETTINGS

Step 8 — Make Outdoor-Air Adjustments and

Install Outdoor-Air Hood ..................13

• MANUAL OUTDOOR-AIR DAMPER

• OPTIONAL VARISLIDE™ ECONOMIZER

• OPTIONAL PARABLADE ECONOMIZER

Step 9 — Adjust Evaporator-Fan Speed ......18

• DIRECT DRIVE MOTORS

• BELT DRIVE MOTORS

START-UP .................................27,28

SERVICE ..................................29-33

TROUBLESHOOTING ......................34-40

START-UP CHECKLIST .....................CL-1

SAFETY CONSIDERATIONS

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

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

Follow all safety codes. Wearsafety glasses and work gloves. Use quenching cloth for unbrazing operations. Have ﬁre extinguishers available for all brazing operations.

Disconnect gas piping from unit when leak testing at pressure greater than1⁄2psig. Pressures greater than1⁄2psig will cause gas valve damage resulting in hazardous condition. If gas valve is subjected to pressure greater than1⁄2psig, it must be replaced before use. When pressure testing ﬁeld-supplied gas piping at pressures of

⁄2psig or less, a unit connected to such piping must be isolated by manually closing the gas valve.

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

INSTALLATION

Unit is shipped in the vertical discharge conﬁguration. To convert to horizontal conﬁguration, remove screws from side duct opening covers and remove covers. Using the same screws, install covers on vertical duct openings with the insulationside down. Seals around duct openings must be tight. See Fig. 1.

Step 1 — Provide Unit Support

ROOF CURB — Assemble and install accessory roof curb in accordance with instructions shipped with curb. See Fig. 2. Install insulation, cant strips, rooﬁng felt, and counter ﬂashing as shown. Ductwork must be attached to curb, not to the unit. The accessory thru-the-bottom power connection package must be installed before the unit is set on the roof curb. If ﬁeld installed (through the roof curb) gas connections are desired, use factory supplied3⁄4in. pipe coupling and gas plate assembly to mount the through the roof curb connection to the roof curb. Gas connections and power connections to the unit must be ﬁeld installed after the unit is installed on the roof curb.

IMPORTANT: The gasketing of the unit to the roof curb is critical for a watertight seal. Install gasket supplied with the roof curb as shown in Fig. 2. Improperly applied gasket can result in air leaks and poor unit performance.

48TJE/TJF004

48TJD/TJE/TJF005-007

Single-Package Rooftop Heating/Cooling Units

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

Book 1 4 Tab 1a 6a

PC 111 Catalog No. 534-852 Printed in U.S.A. Form 48TJ-9SI Pg 1 8-95 Replaces: 48TJ-3SI

Page 2

Curb should be level. Unit leveling tolerances are shown in Fig. 3. This is necessary for unit drain to function properly. Refer to Accessory Roof Curb Installation Instructions for additional information as required.

SLAB MOUNT (Horizontal Units Only) — Provide a level concrete slab that extends a minimum of 6 in. beyond unit cabinet. Install a gravel apron in front of condenser coil air inlet to prevent grass and foliage from obstructing airﬂow.

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

Step 2 — Field Fabricate Ductwork — Secure all

ducts to roof curb and building structure on vertical units. Do not connect ductwork to unit. For horizontal applications, ﬁeld-supplied ﬂanges should be attached to horizontal discharge openings and all ductwork should be secured to the ﬂanges. Insulate and weatherproof all external ductwork, joints, and roof openings with counter ﬂashing and mastic in accordance with applicable codes.

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

If a plenum return is used on a vertical unit, the return should be ducted through the roof deck to comply with applicable ﬁre codes.

A minimum clearance is not required around ductwork. Cabinet return air static shall not exceed 2.20 in. wg with PARABLADE, economizer 2.35 in. wg with Varislide™ economizer or 2.45 in. wg without economizer.

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

Step 3 — Install External Trap for Condensate Drain —

The unit’s 3/4-in. condensate drain connections are located at the bottom and side of the unit. Unit discharge connections do not determine the use of drain connections; either drain connection can be used with vertical or horizontal applications.

When using the standard side drain connection, make sure the plug in the alternate bottom connection is tight before installing the unit.

To use the bottom drain connection for a roof curb installation, relocate the factory-installed plug from the bottom connection to the side connection. See Fig. 4A.The piping for the condensate drain and external trap can be completed after the unit is in place.

All units must have an external trap for condensate drainage. Install a trap at least 4-in. deep and protect against freezeup. See Fig. 4B. If drain line is installed downstream from the external trap, pitch the line away from the unit at 1 in. per 10 ft of run. Do not use a pipe size smaller than the unit connection.

Step4 — Rig and Place Unit — Inspect unit for trans-

portation damage. File any claim with transportation agency. Keep unit upright and do not drop. Spreader bars are not required if top crating is left on unit. Rollers may be used to move unit across a roof. Level by using unit frame as a reference. See Table 1 and Fig. 5 for additional information.

Lifting holes are provided in base rails as shown in Fig. 6. Refer to rigging instructions on unit.

All panels must be in place when rigging.

Fig. 1 — Horizontal Conversion Panels

Page 3

CONNECTION SIZES

UNIT SIZE 48TJ

DALT

DRAIN

HOLE

‘‘E’’

GAS

POWER CONTROL

CONNECTOR

PACKAGE

ACCESSORY

004-007

18-9

⁄

[551]

18-49 [406]

13⁄

[44.5]

⁄

NPT

⁄

NPT

⁄

NPT

CRBTMPWR001A00

(Thru-the-Bottom)

ROOF CURB

ACCESSORY

‘‘A’’

UNIT SIZE

48TJ

CRRFCURB001A00

18-29 [356]

004-007

CRRFCURB002A00

28-09 [610]

NOTES:

1. Roof curb accessory is shipped unassembled.

2. Insulated panels.

3. Dimensions in [ ] are in millimeters.

4. Roof Curb: galvanized steel.

5. Attach ductwork to curb. (Flanges of duct rest on curb.)

6. Service clearance is 4 ft on each side.

7. Direction of airﬂow.

Fig. 2 — Roof Curb Dimensions

Page 4

POSITIONING — Maintain clearance around and above unit to provide minimum distance from combustible materials, proper airﬂow, and service access. See Fig. 6. A properly positioned unit will have the following clearances between unit and roof curb:1⁄4-in. clearance between roof curb and base rails on each side and front of unit; 15⁄32-in. clearance between roof curb and rear of unit. (See Fig. 2, section C-C.)

Do not install unit in an indoor location. Do not locate unit air inlets near exhaust vents or other sources of contaminated air.

Be sure that unit is installed such that snow will not block the combustion intake or ﬂue outlet.

Unit may be installed directly on wood ﬂooring or on Class A, B, or C roof-covering material when roof curb is used.

Although unit is weatherproof, guard against water from higher level runoff and overhangs.

Flue vent discharge must have a minimum horizontal clearance of 4 ft from electric and gas meters, gas regulators, and gas relief equipment.

Minimum distance between unit and other electrically live parts is 48 inches.

Flue gas can deteriorate building materials. Orient unit such that ﬂue gas will not affect building materials.

Adequate combustion-air space must be provided for proper operation of this equipment. Be sure that installation complies with all local codes and Section 5.3, Air for Combustion and Ventilation, NFGC (National Fuel Gas Code), and ANSI (American National Standards Institute) Z223.1, and NFPA (National Fire Protection Association) 54 TIA-54-84-1. In Canada, installation must be in accordance with the CAN1-B149 installation codes for gas burning appliances.

After unit is in position, remove rigging skids and shipping materials.

Step 5 — Install Flue Hood — Flue hood is shipped

screwed to the burner compartment access panel. Remove from shipping location and using screws provided, install flue hood and screen in location shown in Fig. 7.

Step 6 — Install Gas Piping — Unit is equipped for

use with type of gas shown on nameplate. Refer to local building codes, or in the absence of local codes, to ANSI Z223.1 entitled National Fuel Gas Code. In Canada, installation must be in accordance with the CAN1.B149.1 and CAN1.B149.2 installation codes for gas burning appliances.

For natural gas applications, gas pressure at unit gas con-

nection must not be less than 4 in. wg or greater than

13.0 in. wg while unit is operating. On 48TJ005,006,007 high heat units, the gas pressure at unit gas connection must not be less than 5 in. wg or greater than 13 in. wg while the unit is operating. For propane applications, the gas pressure must not be less than 5 in. wg or greater than 13 in. wg at the unit connection.

Size gas supply piping for 0.5 in. wg maximum pressure drop. Do not use supply pipe smaller than unit gas connection. Support gas piping as shown in the table in Fig. 8. For example, a

⁄4-in. gas pipe must have one ﬁeld-fabricated support beam every 8 ft. Therefore, an 18-ft long gas pipe would have a minimum of 2 support beams, a 48-ft long pipe would have a minimum of 6 support beams.

See Fig. 8 for typical pipe guide and locations of external

manual main shutoff valve.

Step 7 — Make Electrical Connections

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

DISCONNECT BOX LOCATION—The ﬁeld-supplied disconnect box may be mounted on the unit’s end panel or on the corner post. Mount disconnect box on the left side of the rating plate when mounting on the unit’s end panel. Do not mount the disconnect box over the unit rating plate. When mounting disconnect box on corner post, secure disconnect box to corner post and condenser coil top cover. See Fig. 7.

A disconnect box mounting space is available when an optional or accessory condenser coil grille is used. Mount the disconnect on the sheet metal provided with the condenser coil grille. The sheet metal is located adjacent to the corner post on the left side of the power wiring access panel.

Page 5

FIELD POWER SUPPLY— All units except 208/230-v units are factory wired for the voltage shown on the nameplate. If the 208/230-v unit is to be connected to a 208-v power supply, the transformer must be rewired by moving the black wire from the 230-v orange wire on the transformer and connecting it to the 200-v red wire from the transformer. The end of the orange wire must then be insulated.

Refer to unit label diagram for additional information. Wiring leads are provided for ﬁeld service. Use copper conductors only when splice connectors are used.

When installing units, provide a disconnect per NEC.

All ﬁeld wiring must comply with NEC and local requirements. In Canada, electrical connections must be in accordance with CSA (Canadian Standards Association) C22.1 Canadian Electrical Code Part 1.

Install ﬁeld wiring as follows:

1. Connect ground lead to chassis ground connection when

using separate ground ties.

2. Install conduit between disconnect and side panel. Insert

conduit through power supply knockout opening. See Fig. 9.

3. Connect power lines to power wiring leads.

4. Pigtails are provided for ﬁeld power connections and are

located inside the burner access panel. See Fig. 10 and

11. Use factory-supplied splices or Underwriters’ Laboratories (UL) approved copper connector.

Voltageto compressor terminals during operation must be within voltage range indicated on unit nameplate (see Table 2). On 3-phase units, voltages between phases must be balanced within 2% and the current within 10%. Use the formula shown in the legend for Table 2, Note 2 to determine the percent of voltage imbalance. Operation on improper line voltage or excessive phase imbalance constitutes abuse and may cause damage to electrical components. Such operation would invalidate any applicable Carrier warranty.

FIELD CONTROL WIRING — Install a Carrier-approved accessory thermostat assembly according to installation instructions included with the accessory. Locate thermostat assembly on a solid wall in the conditioned space to sense average temperature in accordance with thermostat installation instructions. Connect thermostat wires to terminal board.

Route thermostat cable or equivalent single leads of colored wire from subbase terminals through connector on unit to low-voltage connections (shown in Fig. 12).

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

Feed control wires through the raceway located between the condenser coil top cover and burner side panel. See Fig. 10. Connect control wires to corresponding screw terminals, the low-voltage connections located inside lowvoltage access panel. See Fig. 12 for connections. The lowvoltage connections provide the ULrequired clearance between high- and low-voltage wiring.

HEAT ANTICIPATOR SETTINGS — Set heat anticipator settings at .14 amp for the ﬁrst stage and .14 amp for secondstage heating, when available.

MAXIMUM ALLOWABLE DIFFERENCE

(in.)

A-B B-C A-C

0.5 1.0 1.0

Fig. 3 — Unit Leveling Tolerances

Page 6

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

Fig. 4A — Internal Trap Condensate Drain

NOTES:

1. Dimensions in ( ) are in millimeters.

2. Hook rigging shackles through holes in base rail, as shown in detail ‘‘A.’’ Holes in base rails are centered around the unit center of gravity.Use wooden top skid when riggingtopreventriggingstraps from damaging unit.

UNIT

MAX

WEIGHT

‘‘A’’ ‘‘B’’ ‘‘C’’

Lb Kg in. mm in. mm in. mm

48TJE/TJF004 510 231

73.69 1872 37.50 953 33.35 847

48TJD/TJE/TJF005 520 236 48TJD/TJE/TJF006 540 245 48TJD/TJE/TJF007 615 279

Fig. 5 — Rigging Details

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

Fig. 4B — External Trap Condensate Drain

3. Unit weights do not include economizer. See Table 1 for economizer weights.

All panels must be in place when rigging.

Page 7

Table 1 — Physical Data

BASE UNIT 48 TJE/TJF004 TJD/TJE/TJF005 TJD/TJE/TJF006 TJD/TJE/TJF007 NOMINAL CAPACITY (tons) 3456 OPERATING WEIGHT (lb)

Unit 460 470 490 565 Varislide™ Economizer 34 34 34 34 PARABLADE Economizer 42 42 42 42 Roof Curb 115 115 115 115

COMPRESSOR Hermetic (Reciprocating)

Quantity 1111 Oil (oz) 50 50 50 65

REFRIGERANT TYPE R-22

Operating Charge

(lb-oz) 3-6 4-11 5-13 9-0

CONDENSER COIL Enhanced Copper Tubes, Aluminum Lanced Fins

Rows...Fins/in. 1...17 1...17 1...17 2...17 Total Face Area (sq ft) 7.36 11.39 13.19 10.42

CONDENSER FAN Propeller Type

Nominal Cfm 3500 4000 4000 4000 Quantity...Diameter (in.) 1...22.0 1...22.0 1...22.0 1...22.0 Motor Hp...Rpm

⁄4...1100

Watts Input (Total) 325 325 325 325

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

Rows...Fins/in. 2...15 2...15 3...15 4...15 Total Face Area (sq ft) 4.17 5.5 5.5 5.5

EVAPORATOR FAN Centrifugal Type

Quantity...Size (in.) Std 1...10 x 10 1...10 x 10 1...11 x 10 1...10 x 10

Alt 1...10 x 10 1...10 x 10 1...10 x 10 —

Type Drive Std Direct Direct Direct Belt

Alt Belt Belt Belt —

Nominal Cfm Std 1200 1600 2000 2400

Alt 1200 1600 2000 —

Maximum Continuous Bhp Std .34 .75 1.20 2.40

Alt 1.00 1.00 1.80 —

Motor Frame Size Std 48 48 48 56

Alt 48 48 56 —

Nominal Rpm High/Low Std 860/800 1075/970 1075/970 —

Alt ————

Fan Rpm Range Std — — — 1070-1460

Alt 760-1090 840-1185 900-1300 — Motor Bearing Type Ball Ball Ball Ball Maximum Allowable Rpm 2100 2100 2100 2100 Motor Pulley Pitch Diameter Min/Max (in.) Std — — — 2.8/3.8

Alt 1.9/2.9 1.9/2.9 2.4/3.4 — Nominal Motor Shaft Diameter (in.) Std

⁄

Alt

⁄

—

Fan Pulley Pitch Diameter (in.) Std — — — 4.5

Alt 4.5 4.0 4.5 — Belt, Quantity...Type...Length (in.) Std — — — 1...A...40

Alt 1...A...39 1...A...36 1...A...39 — Pulley Center Line Distance (in.) Std — — — 14.7-15.5

Alt 10.0-12.4 10.0-12.4 14.7-15.5 — Speed Change per Full Turn of Std —— — 80

Movable Pulley Flange (rpm) Alt 65 70 80 —

Movable Pulley Maximum Full Turns Std —— — 5

From Closed Position Alt 55 5 —

Factory Setting Std —— — 3

Alt 33 3 — Factory Speed Setting (rpm) Std — — — 1225

Alt 890 980 1060 — Fan Shaft Diameter at Pulley (in.)

⁄

LEGEND

Bhp — Brake Horsepower

*Rollout switch is manual reset.

†The 48TJD005-007 and 48TJE004 (74,000 Btuh) units have 2 burners. The 48TJE005-

007 and 48TJF004 (115,000 Btuh) units and the 48TJF005-007 (150,000 Btuh) units have 3 burners.

**Indicates a FIOP (factory-installed option).

††Requires an optional/accessory controls upgrade kit.

Page 8

Table 1 — Physical Data (cont)

BASE UNIT 48 TJE/TJF004 TJD/TJE/TJF005 TJD/TJE/TJF006 TJD/TJE/TJF007 FURNACE SECTION

Rollout Switch Cutout Temp (F)* 195 195 195 195

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

Natural Gas .113...33 .113...33/

.113...33/ .129...30

.113...33/ .113...33/ .129...30

Liquid Propane** .082...45 .082...45/

.082...45/ .102...38

.082...45/ .082...45/ .102...38

Thermostat Heat Anticipator Setting (amps)

208/230/460 v Stage 1 .14 .14 .14 .14

Stage 2 .14 .14 .14 .14

Gas Input (Btuh) Stage 1 74,000/

82,000

74,000/ 115,000/ 120,000

Stage 2 —/

115,000

—/ —/

150,000

—/ —/

150,000

—/ —/

150,000

Efficiency (Steady State) (%)

80 80 80 80

Temperature Rise Range 25-55/

55-85

25-55/ 35-65/ 50-80

25-55/

35-65/

50-80

Manifold Pressure (in. wg)

Natural Gas 3.5 3.5 3.5 3.5 Liquid Propane** 3.5 3.5 3.5 3.5

Gas Valve Quantity 1111 Field Gas Connection Size (in.)

⁄

HIGH-PRESSURE SWITCH (psig)††

Standard Compressor Internal Relief (Differential)

450±50 500±50

Cutout 428 428 Reset (Auto.) 320 320

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

Cutout 7±3 Reset (Auto.) 22±7

FREEZE-PROTECTION THERMOSTAT (F)††

Opens 30±5 Closes 45±5

OUTDOOR-AIR INLET SCREENS Cleanable

Quantity...Size (in.) 1...20 x 24 x 1

RETURN-AIR FILTERS Throwaway

Quantity...Size (in.) 2...16 x 25 x 2

LEGEND

Bhp — Brake Horsepower

*Rollout switch is manual reset.

†The 48TJD005-007 and 48TJE004 (74,000 Btuh) units have 2 burners. The 48TJE005-

007 and 48TJF004 (115,000 Btuh) units and the 48TJF005-007 (150,000 Btuh) units have 3 burners.

**Indicates a FIOP (factory-installed option).

††Requires an optional/accessory controls upgrade kit.

Page 9

UNIT

STD. UNIT

WEIGHT

ECONOMIZER WEIGHT

CORNER

WEIGHT

(A)

CORNER

WEIGHT

(B)

CORNER WEIGHT

(C)

CORNER

WEIGHT

(D)

Varislide™ PARABLADE

Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg Lb Kg

48TJF/TJE004 460 209 34 15.4 42 19.1 140 63.5 105 47.6 159 72.1 56 25.4 48TJD/TJE/TJF005 470 213 34 15.4 42 19.1 142 64.4 106 48.1 162 73.5 60 27.2 48TJD/TJE/TJF006 490 222 34 15.4 42 19.1 150 68.0 115 52.2 160 72.6 65 29.5 48TJD/TJE/TJF007 565 256 34 15.4 42 19.1 165 74.8 136 61.7 200 90.7 64 29.0

LEGEND

LED — Light-Emitting Diode

*Indicates horizontal center of gravity.

†Indicates vertical center of gravity. NOTES:

1. Dimensions in [ ] are in millimeters.

2. Center of Gravity.

3. Direction of airﬂow.

4. On vertical discharge units, ductwork should be attached to accessory roof curb only. For horizontal discharge units, ﬁeld-supplied ﬂanges should be attachedto horizontal openings.All ductworkshould beattached to theflanges.

5. Minimum clearances (local codes or jurisdiction may prevail): a. Between unit, ﬂue side, and combustible surfaces, 36 inches.

b. Bottom ofunitto combustible surfaces (when not usingcurb) 1 inch. Bot-

tom of base rail to combustible surfaces (when not using curb) 0 inches.

c. Condenser coil, for proper airﬂow, 36 in. one side, 12 in. the other. The

side getting the greater clearance is optional. d. Overhead, 60 in. to assure proper condenser fan operation. e. Betweenunits, control box side,42 in. perNEC (National Electrical Code). f. Between unit andungrounded surfaces, control boxside, 36 in. perNEC. g. Between unit and block or concrete walls and other grounded surfaces,

control box side, 42 in. per NEC.

h. Horizontal supply and return end, 0 inches.

6. With the exception of the clearance for the condenser coil and combustion side asstated in notes 5a, b,and c, a removable fenceor barricade requires no clearance.

7. Units may be installed on combustible ﬂoors made from wood or classA, B, or C roof covering material if set on baserail.

CONNECTION SIZES

A 1

⁄169 Dia. (27) Field Power Supply Hole

⁄49−14 NPT Condensate Drain

⁄29−14 NPT Gas Connection

Fig. 6 — Base Unit Dimensions

Page 10

CONDENSER COIL TOP COVER

END PANEL

CORNER POST

Fig. 7 — Flue Hood Details

LEGEND

NFGC — National Fuel Gas Code *Field supplied. NOTE: Follow all local codes.

SPACING OF SUPPORTS

STEEL PIPE

DIMENSIONS

(feet)

NOMINAL

DIAMETER

(in.)

⁄

⁄4or 1 8

11⁄4or larger 10

Fig. 8 — Gas Piping Guide (With Accessory

Thru-the-Curb Service Connections)

Fig. 9 — Conduit Installation

LEGEND

IGC — Integrated Gas Unit Controller LED — Light-Emitting Diode

Fig. 10 — Component Location

Page 11

208/230-1-60

575-3-60

(SIZE 007 ONLY)

LEGEND

C—Contactor COMP — Compressor NEC — National Electrical Code TB — Terminal Block

Fig. 11 — Power Wiring Connections

LEGEND

AHA — Adjustable Heat Anticipator TH — Thermostat-Heating CC — Cooling Compensator

Field Wiring

TC — Thermostat-Cooling

Factory Wiring

NOTES:

1. Connect Y2 when unit is equipped with an economizer.

2. Connect W2 when unit is equipped with two stages of heat.

Fig. 12 — Low-Voltage Connections

208/230-3-60

460-3-60

(SIZE 007 ONLY)

208/230-3-60

575-3-60, 460-3-60

(SIZES 004-006)

Page 12

Table 2 — Electrical Data

UNIT

NOMINAL

V-PH-HZ

IFM

TYPE

VOLTAGE

RANGE

COMPR

(each)

OFM IFM

COMBUSTION

FAN

MOTOR

POWER SUPPLY

DISCONNECT

SIZE*

Min Max RLA LRA FLA FLA FLA MCA MOCP† FLA LRA

48TJ004 (3 Tons)

208/230-1-60

Std

187 254 16.9 86.7 1.4

2.8 .57

25.3/25.3 35/35 24/24 97/97

Alt 4.9 27.4/27.4 35/35 27/27 102/102

208/230-3-60

Std

187 254 11.7 65.1 1.4

2.8 .57

18.8/18.8 25/25 18/18 76/76

Alt 4.9 20.9/20.9 25/25 21/21 80/80

460-3-60

Std

414 508 5.1 32.8 0.8

1.3 .30

8.5 15 8 38

Alt 2.1 9.3 15 9 41

575-3-60

Std

518 632 4.1 37.0 0.8

1.3 .30

7.4 15 7 32

Alt 2.1 6.7 15 7 32

48TJ005 (4 Tons)

208/230-1-60

Std

187 254 23.0 110.0 1.4

3.5 .57

33.7/33.7 40/40 32/32 122/122

Alt 4.9 35.1/35.1 40/40 34/34 125/125

208/230-3-60

Std

187 254 15.3 92.0 1.4

3.5 .57

24.0/24.0 30/30 23/23 104/104

Alt 4.9 25.4/25.4 30/30 25/25 107/107

460-3-60

Std

414 508 7.0 46.0 0.8

1.8 .30

11.4 15 11 52

Alt 2.1 11.7 15 11 54

575-3-60

Std

518 632 5.8 44.0 0.8

1.8 .30

9.3 15 9 49

Alt 2.1 9.6 15 9 51

48TJ006

(5 Tons)

208/230-1-60

Std

187 254 30.5 141.0 1.4

5.9 .57

42.7/42.7 50/50 43/43 155/155

Alt 8.8 48.3/48.3 60/60 47/47 178/178

208/230-3-60

Std

187 254 17.7 110.0 1.4

5.9 .57

29.4/29.4 35/35 29/29 124/124

Alt 5.8 29.3/29.3 35/35 29/29 145/145

460-3-60

Std

414 508 8.6 55.0 0.8

3.2 .30

14.8 20 15 63

Alt 2.6 14.2 20 14 73

575-3-60

Std

518 632 6.4 50.0 0.8

3.2 .30

12.0 15 12 52

Alt 2.6 11.4 15 12 62

48TJ007

(6 Tons)

208/230-3-60 Std 187 254 20.9 142.0 1.4 5.8 .57 33.3/33.3 40/40 32/32 187/187

460-3-60 Std 414 508 9.9 72.0 0.6 2.6 .30 15.6 20 15 94 575-3-60 Std 518 632 7.9 58.0 0.6 2.6 .30 14.4 15 12 76

IMPORT ANT:Optional,alternate evaporator-fan motor and drive are not available for 48TJ007 units. Contact your local Carrier representative for more information about ﬁeld-installed motors.

LEGEND

COMPR — Compressor FLA — Full Load Amps HACR — Heating,Air Conditioning and

Refrigeration

IFM — Indoor (Evaporator) Fan Motor LRA — Locked Rotor Amps MCA — Minimum Circuit Amps MOCP — Maximum Overcurrent Protection NEC — National Electrical Code OFM — Outdoor (Condenser) Fan Motor RLA — Rated Load Amps

*Used to determine minimum disconnect per NEC. †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 StandardsAssociation(CSA)unitsmaybe 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

452 + 464 + 455

Average Voltage =

1371

= 457 NOTE: The 575-v units are CSA only. Determine maximum deviation from average voltage.

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

Maximum deviation is 7 v. Determine percent voltage imbalance.

% 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.

Page 13

Step 8 — Make Outdoor-Air Adjustments and Install Outdoor-Air Hood

MANUAL OUTDOOR-AIR DAMPER — The outdoor-air hood and screen are attached to the basepan at the bottom of the unit for shipping.

Assembly:

1. Determine quantity of ventilation required for building. Record amount for use in Step 8.

2. Remove and save evaporator coil access panel and screws. See Fig. 13.

3. Separate hood and screen from basepan by removing the 4 screws securing them. Save all screws.

4. Replace evaporator coil access panel.

5. Place hood on front of evaporator coil access panel. See Fig. 14 for hood details. Secure top of hood with the 4 screws removed in Step 3. See Fig. 15.

6. Remove and save 6 screws (3 on each side) from sides of the manual outdoor-air damper.

7. Align screw holes on hood with screw holes on side of manual outdoor-air damper. See Fig. 14 and 15. Secure hood with 6 screws from Step 6.

8. Adjust minimum position setting of the damper blade by adjusting the manual outdoor-air adjustment screws on the front of the damper blade. See Fig. 13. Slide blade vertically until it is in the appropriate position determined by Fig. 16. Tighten screws.

9. Remove and save screws currently on sides of hood. Insert screen. Secure screen to hood using the screws. See Fig. 15.

Fig. 13 — Damper Panel with Manual Outdoor-Air

Damper Installed

Fig. 14 — Outdoor-Air Hood Details

Fig. 15 — Outdoor-Air Damper with

Hood Attached

Fig. 16 — Position Setting

Page 14

OPTIONAL VARISLIDE ™ ECONOMIZER — The optional economizer hood assembly is packaged and shipped in the ﬁlter section. Damper blades and control boards are installed at the factory and the economizer is shipped in the vertical discharge position.

NOTE: Horizontal discharge block-off plate is shipped with the air hood package. If unit is to be used for vertical discharge application, discard this plate.

Assembly:

1. Determine if ventilation air is required in building. If so, determine minimum amount to be supplied by each unit and record quantity of ventilation air needed for use in Step 7.

2. Remove ﬁlter access panel by raising panel and swinging panel outward. Panel is now disengaged from track and can be removed. No tools are required to remove ﬁlter access panel. Remove outdoor-air opening panel. Save panels and screws. See Fig. 17. Remove optional outdoor-air damper hood package from ﬁlter section.

3. Assemble outdoor-air hood top and side plates as shown in Fig. 18. Install seal strips on hood top and sides. Put aside screen retainer and screws for later assembly. Do

not attach hood to unit at this time.

4. To convert to horizontal discharge application: a. Rotate economizer 90 degrees until the economizer

motor faces the condenser section (see Fig. 19).

b. Rotate the barometric relief damper cover 90

degrees.

c. Install horizontal discharge block-off plate over the

opening on the access panel. (Block-off plate MUST be installed before installing hood assembly.) See Fig. 20.

5. Insert economizer plug into economizer harness. Remove tape from barometric relief damper. See Fig. 21.

6. If ventilation air is not required, proceed to Step 8. If ventilation air is required, determine minimum position setting for required airﬂow. See Fig. 22. Adjust minimum position setting by adjusting the screws on the position setting bracket. Slide bracket until the top screw is in the position determined by Fig. 22. Tighten screws.

7. Remove tape from outdoor-air thermostat (OAT). Fasten OAT to inside of hood using screws and speed clips provided. See Fig. 23. Make sure OAT terminals are positioned up.

8. Replace outdoor-air opening panel using screws from Step 2. Replace ﬁlter access panel. Ensure the ﬁlter access panel slides along the tracks and is securely engaged.

9. Fasten hood top and side plate assembly (Fig. 18) to outdoor-air opening panel with screws provided.

10. Place knob supplied with economizer on OAT. See Fig. 23. Set for 3° F below indoor room thermostat setting. If accessory enthalpy control (EC) is used in place of OAT, see instructions shipped with EC for installation and adjustment. See Fig. 23.

11. Connect OAT per Fig. 24.

12. Slide outdoor-air inlet screen into screen track on hood side plate. While holding screen in place, fasten screen retainer to hood using screws provided.

NOTE: Refer to Fig. 25 for economizer barometric relief damper characteristics.

FILTER ACCESS PANEL

CONTROL BOX PANEL

Fig. 17 — Typical Access Panel Locations

Fig. 18 — Outdoor-Air Hood Details

ECONOMIZER CONTROL BOARD

BAROMETRIC RELIEF DAMPER

ECONOMIZER PLUG

ECONOMIZER MOTOR

Fig. 19 — Horizontal Varislide™ Economizer

Installation

Page 15

Fig. 20 — Horizontal Discharge Block-Off Plate

ECONOMIZER CONTROL BOARD

ECONOMIZER PLUG

ECONOMIZER MOTOR

TOP SCREW

BAROMETRIC RELIEF DAMPER

WIRING HARNESS

POSITION SETTING BRACKET

U-SHAPED HOLE (NOT SHOWN)

Fig. 21 — Varislide™ Economizer Installed in Unit

EXAMPLE:

Given — Negative Pressure ..................0.2in.wg

Outdoor Air ........................900cfm

Determine — Setting=5in.

Fig. 22 — Varislide Economizer Minimum Position

Setting

MINIMUM

POSITION

OPEN

REV. B

198818A

D C

B A

60 65 70

DAMPER

CLOSED

OPEN

OUTDOOR TEMP.

°F

REV.

97-3672

CW–SETPOINTS–CCW

CONTACTS SHOWN IN HIGH ENTHALPY

RUSH AT 24VAC

3 mA MIN. AT 11 VDC

CONTACT RATINGS: 1.5A RUN, 3.5A IN

OR UNPOWERED STATE

TR1

24VAC

ENTHALPY

CONTROL

Fig. 23 — Outdoor-Air Thermostat/Enthalpy

Control Installation

Page 16

OPTIONAL PARABLADE ECONOMIZER — The optional PARABLADE economizer hood assembly is packaged and shipped in the ﬁlter section. Damper blades and control boards are installed at the factory and the economizer is shipped in the vertical discharge position.

NOTE: Horizontal discharge block-off plate is shipped with the air hood package. The PARABLADE economizer can only be used for vertical discharge applications. Discard this plate.

Assembly

1. Determine if ventilation air is required in building. If so, determine minimum amount to be supplied by each unit and record quantity of ventilation air needed for use in Step 5.

3. Assemble outdoor-air hood top and side plates as shown in Fig. 18. Install seal strips on hood top and sides. Put aside screen retainer and retainer screw for later assembly. Do not attach hood to unit at this time.

4. Insert economizer plug into economizer harness. Remove tape from barometric relief damper. See Fig. 26.

5. If ventilation air is not required, proceed to Step 6. If ventilation air is required, perform the following:

a. Make sure the factory-installed jumper is in place across

terminals P and P1 on the economizer logic module. T and T1 should be disconnected during adjustment.

b. The 2 potentiometers with slots for adjustment are lo-

cated on the face of the economizer logic module. Turn the lower potentiometer fully clockwise. The dampers should be fully closed. Turn the potentiometer gradu-

ally counterclockwise until the desired position is reached. c. Connect T and T1 to the 24-v power supply. d. After installation is complete, calculate the minimum

airﬂow across the economizer. To calculate the mini-

mum airﬂow, the following data is needed: total cfm

(cfm3), temperature of the total cfm (T3), temperature

of the return air (T2), and temperature of the entering

outside air (T1). Cfm1is the outside air (minimum)

cfm.

Insert the data into the following equations:

T1(cfm1)+T2(cfm2)

cfm

cfm2= (cfm3− cfm1)

Therefore:

T1(cfm1)+T2(cfm3− cfm1)

cfm

Further derivation reveals the following formula for

airﬂow:

(T3−T2) cfm

cfm1=

(T1−T2)

Use this equation to determine cfm1, which is the mini-

mum airﬂow across the economizer.

If cfm1does not match the desired minimum airﬂow

from Step 1, readjust the minimum position setting screw.

Fig. 25 — Varislide™Economizer Barometric Relief

Damper Characteristics

LEGEND

OAT — Outdoor-Air Thermostat NOTE: See unit wiring diagram for details.

Fig. 24 — Wiring Connections for Outdoor-Air

Thermostat

Fig. 26 — PARABLADE Economizer Installed

in Unit

Page 17

6. Determine the enthalpy changeover set point from Fig. 27. The enthalpy changeover set point should be set to return the outdoor-air damper to the minimum position when enthalpy rises above the set point. The settings are A, B, C, and D. Set the enthalpy changeover per the setting in Fig. 27.

7. Replace outdoor-air opening panel using screws from Step 2. Replace ﬁlter access panel. Ensure the ﬁlter access panel slides along the tracks and is securely engaged. See Fig. 28.

8. Fasten hood top and side plate assembly (Fig. 29) to outdoorair opening panel with screws provided.

9. Slide outdoor-air inlet screen into screen track on hood side plate. While holding screen in place, fasten screen retainer to hood using screws provided. See Fig. 30.

NOTE: Refer to Fig. 31 for PARABLADEeconomizer barometric relief damper characteristics.

CONTROL

CURVE

CONTROL POINT

(APPROX. DEG.)

AT 50% RH

A 73 (23) B 70 (21) C 67 (19) D 63 (17)

RH — Relative Humidity

Fig. 27 — Enthalpy Settings for PARABLADE

Economizer

Fig. 28 — Panel Reinstalled on Unit

Fig. 29 — Outdoor-Air Hood Installed

on Unit

Fig. 30 — Filter Installed on Outdoor-Air

Hood

Page 18

Step 9 —Adjust Evaporator-Fan Speed — Adjust

evaporator-fanspeed to meet jobsite conditions. Table 3 shows fan rpm at motor pulley settings. Table 4 shows motor performance. Refer to Tables 5-18 to determine fan speed settings.

DIRECT DRIVE MOTORS — The evaporator-fan motor factory speed setting is shown on label diagram affixed to base

unit. If other than factory setting is desired, refer to label diagram for motor reconnection. See Fig. 32 for direct drive motor location.

BELT DRIVE MOTORS — Fan motor pulleys are factory set for speed shown in Table 1. See Fig. 33 for belt drive motor location.

NOTE: Before adjusting fan speed, make sure the new fan speed will provide an air temperature rise range as shown in Table 1.

To change fan speed:

1. Shut off unit power supply.

2. Loosen belt by loosening fan motor mounting nuts. See Fig. 33.

3. Loosen movable pulley ﬂange setscrew (see Fig. 34).

4. Screw movable ﬂange toward ﬁxed ﬂange to increase speed and away from ﬁxed ﬂange to decrease speed. Increasing fan speed increases load on motor. Do not exceed maximum speed speciﬁed in Table 1.

5. Set movable ﬂange at nearest keyway of pulley hub and tighten setscrew. (See Table 1 for speed change for each full turn of pulley ﬂange.)

Fig. 31 — PARABLADE Economizer Barometric

Relief Damper Characteristics

Fig. 32 — Direct Drive Motor Mounting

MOTOR MOUNTING

NUTS AND BOLTS

Fig. 33 — Belt Drive Motor Mounting

Fig. 34 — Evaporator-Fan Pulley Adjustment

Page 19

To align fan and motor pulleys:

1. Loosen fan pulley setscrews.

2. Slide fan pulley along fan shaft.

3. Make angular alignment by loosening motor from mounting.

To adjust belt tension:

1. Loosen fan motor mounting nuts.

2. Slide motor mounting plate away from fan scroll for proper belt tension (

⁄2-in. deﬂection with one ﬁnger).

3. Tighten motor mounting nuts.

4. Adjust bolt and tighten nut to secure motor in ﬁxed position.

Table 3 — Fan Rpm at Motor Pulley Settings*

UNIT 48TJ

MOTOR PULLEY TURNS OPEN

⁄

004† 1090 1055 1025 990 960 925 890 860 825 795 760 005† 1185 1150 1115 1080 1045 1015 980 945 910 875 840 006† 1300 1260 1220 1180 1140 1100 1060 1020 980 940 900

007** 1460 1420 1380 1345 1305 1265 1225 1185 1150 1110 1070

*Approximate fan rpm shown.

†Indicates alternate motor and drive package.

**Indicates standard motor and drive package.

Table 4 — Motor Data

UNIT 48TJ

EVAPORATOR-FAN

MOTOR

MAXIMUM

CONTINUOUS

BHP*

MAXIMUM

OPERATING

WATTS*

UNIT

VOLTAGE

MAXIMUM AMP

DRAW

004

Std .34 440

208/230 2.9

460 1.4 575 1.4

Alt 1.00 1000

208/230 5.1

460 2.3 575 2.3

005

Std .75 850

208/230 3.7

460 1.9 575 1.9

Alt 1.00 1000

208/230 5.1

460 2.3 575 2.3

006

Std 1.20 1340

208/230 6.2

570 3.4 575 3.4

Alt 1.80 1921

208/230† 9.2 208/230** 6.1

460 4.7 575 4.7

007 Std 2.40 2120

208/230 6.1

460 2.7 575 2.7

LEGEND

Bhp — Brake Horsepower

*Extensive motor and electrical testing on these units ensures that the full horsepower and watts

range of the motors can be utilized with conﬁdence. Using your fan motors up to the ratings shown in this table will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected.

†Single-phase motor.

**3-phase motor.

Page 20

Table 5 — Fan Performance, 48TJE/TJF004 Vertical Discharge Units;

Standard Motor (Direct)

AIRFLOW

(Cfm)

LOW SPEED HIGH SPEED

208 v 230, 460, 575 v 208 v 230, 460, 575 v

Esp Watts Esp Watts Esp Watts Esp Watts

900 0.49 253 0.50 277 0.51 307 0.55 363 1000 0.42 270 0.43 292 0.43 321 0.51 374 1100 0.37 287 0.38 307 0.39 335 0.46 385 1200 0.33 304 0.33 323 0.34 349 0.40 397 1300 0.27 321 0.28 338 0.28 364 0.34 408 1400 0.20 338 0.23 354 0.25 378 0.29 420 1500 0.16 355 0.18 369 0.20 392 0.23 431

LEGEND

Esp — External Static Pressure (in. wg) NOTES:

1. Values include losses for ﬁlters, unit casing, and wet coils.

2. Extensive motor and electrical testing on these units ensures that the full range of the motor can be utilized with conﬁdence. Using your fan motors up to the wattage ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not

be affected. For additional information on motor performance, refer to Table 4.

3. To convert watts to bhp: watts input x motor efficiency

bhp =

746

Motor efficiency = .63

Table 6 — Fan Performance, 48TJE/TJF004 Vertical Discharge Units;

Alternate Motor (Belt)

AIRFLOW

(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts

900 581 119 673 179 736 219 805 249 865 288 911 338 957 388 988 428 1000 644 189 709 219 782 279 835 298 900 348 937 378 992 438 1039 487 1100 687 219 746 259 806 298 867 348 929 398 964 398 1013 487 1068 547 1200 733 259 785 318 843 348 903 408 960 467 994 497 1045 557 1090 637 1300 754 288 826 378 891 428 942 477 991 527 1047 597 1075 637 1122 696 1400 810 348 868 448 937 507 984 567 1032 617 1067 666 1110 726 1160 766 1500 841 418 911 527 985 607 1029 656 1073 716 1109 766 1150 816 1190 855

AIRFLOW

(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)

0.9 1.0 1.1 1.2

Rpm Watts Rpm Watts Rpm Watts Rpm Watts

900 1039 448 1061 487 1083 527 1105 567 1000 1061 507 1086 547 1111 587 1136 627 1100 1090 577 1109 607 1127 637 1145 666 1200 1109 647 1156 676 1203 706 1250 736 1300 1152 716 1190 756 1228 796 1266 836 1400 1181 806 1237 845 1293 885 1349 925 1500 1225 895 1271 945 1317 995 1363 1044

NOTES:

1. Boldface indicates a ﬁeld-supplied drive is required. (See Note 6.)

2. indicates ﬁeld-supplied motor and drive are required.

3. Maximum usable watts input is 1000. Extensive motor and electrical testing on these units ensures that the full range of the motor can be utilized with conﬁdence. Using your fan motors up to the wattage ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Table 4.

4. Values include losses for ﬁlters, unit casing, and wet coils.

5. Use of a ﬁeld-supplied motor may affect wire sizing. Contact Carrier representative to verify.

6. Alternate motor drive range: 760 to 1090. All other rpms require ﬁeld-supplied drive.

7. To convert watts to bhp:

watts input x motor efficiency

bhp =

746

Motor efficiency = .75

Page 21

Table 7 — Fan Performance, 48TJD/TJE/TJF005 Vertical Discharge Units;

Standard Motor (Direct)

AIRFLOW

(Cfm)

LOW SPEED HIGH SPEED

208 v 230, 460, 575 v 208 v 230, 460, 575 v

Esp Watts Esp Watts Esp Watts Esp Watts

1200 0.68 458 0.74 506 0.74 572 0.85 632 1300 0.61 471 0.67 521 0.66 589 0.78 651 1400 0.53 503 0.59 556 0.59 616 0.70 681 1500 0.45 536 0.51 593 0.52 631 0.63 698 1600 0.36 557 0.42 616 0.45 654 0.56 723 1700 0.26 584 0.32 646 0.37 678 0.48 750 1800 0.15 610 0.22 674 0.30 698 0.41 772 1900 0.04 629 0.11 696 0.23 720 0.34 796 2000 — — — — 0.16 744 0.26 823

LEGEND Esp — External Static Pressure (in. wg) NOTES:

1. Values include losses for ﬁlters, unit casing, and wet coils.

2. Extensive motor and electrical testing on these units ensures that

the full range of the motor can be utilized with conﬁdence. Using your fan motors up to the wattage ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not

be affected. For additional information on motor performance, refer to Table 4.

3. To convert watts to bhp: watts input x motor efficiency

bhp =

746

Motor efficiency = .66

Table 8 — Fan Performance, 48TJD/TJE/TJF005 Vertical Discharge Units;

Alternate Motor (Belt)

AIRFLOW

(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)

0.1 0.2 0.3 0.4 0.6 0.7 0.8 0.9

Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts

1200 596 210 665 263 722 320 779 378 872 504 915 567 957 630 993 678 1300 633 252 699 315 754 378 809 441 902 578 943 641 984 704 1021 772 1400 672 315 735 378 788 441 840 504 933 651 972 720 1011 788 1049 837 1500 711 368 770 441 822 510 873 578 963 725 1002 804 1041 858 1077 922 1600 751 441 840 515 871 588 907 662 993 787 1033 869 1072 950 1107 998 1700 791 515 873 599 907 678 941 757 1024 889 1064 976 1103 1063 1137 1128 1800 831 609 881 693 929 772 976 851 1057 991 1095 1078 1132 1165 1167 1239 1900 872 704 919 788 965 877 1011 967 1091 1104 1127 1191 1162 1277 1197 1360 2000 913 809 958 904 1002 993 1046 1082 1125 1237 1160 1323 1195 1410 1229 1491

AIRFLOW

(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)

1.0 1.1 1.2 1.4 1.6 1.8

Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts

1200 1028 725 1056 751 1083 778 1134 935 1185 935 1231 869 1300 1058 841 1090 888 1121 935 1171 988 1219 1001 1268 1029 1400 1086 885 1120 950 1153 976 1210 1071 1257 1105 1307 1190 1500 1113 985 1147 1054 1180 1081 1241 1215 1295 1294 1339 1350 1600 1141 1084 1174 1134 1207 1196 1269 1339 1326 1454 1376 1558 1700 1171 1194 1203 1278 1235 1310 1296 1463 1354 1605 1407 1738 1800 1202 1313 1233 1398 1263 1425 1323 1597 1381 1747 1436 1907 1900 1232 1442 1263 1532 1294 1559 1351 1731 1408 1889 1463 2068 2000 1262 1572 1294 1671 1325 1702 1382 1884 1436 2040 1489 2229

NOTES:

1. Boldface indicates a ﬁeld-supplied drive is required. (See Note 6.)

2. indicates ﬁeld-supplied motor and drive are required.

4. Values include losses for ﬁlters, unit casing, and wet coils.

5. Use of a ﬁeld-supplied motor may affect wire sizing. Contact Carrier representative to verify.

6. Alternate motor drive range: 840 to 1185. All other rpms require ﬁeld-supplied drive.

7. To convert watts to bhp:

watts input x motor efficiency

bhp =

746

Motor efficiency = .75

Page 22

Table 9 — Fan Performance, 48TJD/TJE/TJF006 Vertical Discharge Units;

Standard Motor (Direct)

AIRFLOW

(Cfm)

LOW SPEED MEDIUM SPEED HIGH SPEED

208 v 230, 460, 575 v 208 v 230, 460, 575 v 208 v 230, 460, 575 v

Esp Watts Esp Watts Esp Watts Esp Watts Esp Watts Esp Watts

1500 0.69 750 1.01 791 1.00 782 1.20 845 1.22 875 1.28 949 1600 0.49 780 0.85 824 0.85 821 1.06 883 1.09 913 1.17 988 1700 0.29 810 0.70 857 0.70 861 0.93 921 0.97 950 1.06 1027 1800 0.09 839 0.54 891 0.55 900 0.80 959 0.84 988 0.95 1066 1900 — — 0.39 924 0.40 940 0.67 997 0.72 1025 0.84 1105 2000 — — 0.23 957 0.25 979 0.54 1035 0.59 1063 0.73 1144 2100 — — 0.08 990 0.10 1018 0.41 1073 0.46 1101 0.62 1183 2200 — — — — — — 0.28 1111 0.34 1138 0.51 1222 2300 — — — — — — 0.15 1149 0.21 1176 0.40 1261 2400 — — — — — — 0.02 1187 0.09 1213 0.29 1300 2500 — — — — — — — — — — 0.18 1340

LEGEND Esp — External Static Pressure (in. wg) NOTES:

1. Values include losses for ﬁlters, unit casing, and wet coils.

2. Extensive motor and electrical testing on these units ensures that

be affected. For additional information on motor performance, refer to Table 4.

3. To convert watts to bhp: watts input x motor efficiency

bhp =

746

Motor efficiency = .67

Table 10 — Fan Performance, 48TJD/TJE/TJF006 Vertical Discharge Units;

Alternate Motor (Belt)

AIRFLOW

(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)

0.1 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6

Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts

1500 729 368 788 429 896 572 981 705 1070 869 1144 1032 1226 1216 1301 1492 1380 1757 1600 770 429 826 501 930 654 1015 797 1098 961 1173 1134 1242 1308 1318 1523 1392 1800 1700 811 511 864 582 964 736 1051 899 1124 1053 1203 1237 1270 1420 1335 1615 1408 1850 1800 852 593 903 674 999 838 1085 1001 1155 1155 1231 1349 1300 1553 1361 1747 1423 1952 1900 893 695 942 777 1035 940 1119 1124 1191 1288 1256 1461 1329 1676 1391 1891 1448 2095 2000 935 797 982 889 1070 1063 1153 1247 1227 1431 1287 1604 1355 1809 1420 2034 1477 2258 2100 977 910 1022 1012 1107 1196 1187 1380 1260 1574 1323 1758 1381 1952 1449 2187 1509 2420 2200 1019 1042 1063 1145 1144 1328 1222 1523 1294 1737 1359 1931 1413 2126 1474 2350 1538 2578 2300 1061 1185 1104 1288 1182 1502 1258 1686 1328 1901 1393 2115 1449 2310 1502 2518 1561 2732 2400 1103 1328 1145 1441 1220 1645 1293 1860 1362 2074 1426 2310 1485 2524 1540 2720 1590 2900 2500 1145 1492 1186 1604 1259 1819 1329 2044 1397 2269 1460 2504 1522 2739 1581 2948 1629 3113

NOTES:

1. Boldface indicates a ﬁeld-supplied drive is required. (See Note 6.)

2. indicates ﬁeld-supplied motor and drive are required.

3. Maximum usable watts input is 1921. Extensive motor and electrical testing on these units ensures that the full range of the motor can be utilized with conﬁdence. Using your fan motors up to the wattage ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Table 4.

4. Values include losses for ﬁlters, unit casing, and wet coils.

5. Use of a ﬁeld-supplied motor may affect wire sizing. Contact Carrier representative to verify.

6. Alternate motor drive range: 900 to 1300. All other rpms require ﬁeld-supplied drive.

7. To convert watts to bhp:

watts input x motor efficiency

bhp =

746

Motor efficiency = .74

Page 23

Table 11 — Fan Performance, 48TJD/TJE/TJF007 Vertical Discharge Units;

Standard Motor (Belt)

AIRFLOW

(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)

0.1 0.2 0.4 0.6 0.8 1.0

Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts

1800 942 700 978 646 1063 771 1147 891 1248 1081 1322 1190 1900 982 779 1023 739 1097 843 1175 1006 1266 1156 1356 1310 2000 1022 867 1068 835 1132 924 1218 1106 1303 1258 1397 1353 2100 1063 998 1115 916 1180 1056 1261 1207 1340 1361 1428 1473 2200 1104 1081 1159 1039 1214 1148 1310 1353 1375 1447 1459 1595 2300 1130 1140 1202 1156 1248 1233 1358 1499 1410 1526 1488 1709 2400 1174 1224 1237 1258 1292 1378 1392 1604 1460 1683 1532 1892 2500 1201 1335 1272 1361 1335 1517 1427 1718 1518 1910 1575 2076 2600 1246 1482 1320 1491 1368 1604 1458 1823 1562 2136 1620 2283 2700 1285 1595 1361 1613 1400 1691 1490 1936 1602 2326 1666 2504 2800 1304 1639 1402 1726 1439 1840 1543 2145 1642 2512 — — 2900 1345 1814 1446 1910 1477 1989 1585 2335 ———— 3000 1378 2032 1489 2084 1529 2223 1598 2444 ————

AIRFLOW

(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)

1.2 1.4 1.6 1.8

Rmp Watts Rpm Watts Rpm Watts Rpm Watts

1800 1395 1301 1475 1387 1542 1517 1609 1648 1900 1430 1404 1504 1499 1556 1613 1655 1840 2000 1459 1482 1532 1613 1588 1744 1675 1919 2100 1489 1595 1567 1761 1626 1910 1684 2067 2200 1528 1726 1603 1919 1666 2093 1711 2241 2300 1561 1884 1637 2076 1710 2272 1760 2442 2400 1584 2015 1671 2249 1756 2467 1825 2664 2500 1633 2232 1698 2405 ———— 2600 1675 2436 —————— 2700 ———————— 2800 ———————— 2900 ———————— 3000 ————————

NOTES:

1. Boldface indicates a ﬁeld-supplied drive is required. (See Note 6.)

2. indicates ﬁeld-supplied motor and drive are required.

3. Maximum usable watts input is 2120. Extensive motor and electrical testing on these units ensures that the full range of the motor can be utilized with conﬁdence. Using your fan motors up to the wattage ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Table 4.

4. Values include losses for ﬁlters, unit casing, and wet coils.

5. Use of a ﬁeld-supplied motor may affect wire sizing. Contact Carrier representative to verify.

6. Standard motor drive range: 1070 to 1460. All other rpms require ﬁeld-supplied drive.

7. To convert watts to bhp:

watts input x motor efficiency

bhp =

746

Motor efficiency = .84

Table 12 — Fan Performance, 48TJE/TJF004 Horizontal Discharge Units;

Standard Motor (Direct)

AIRFLOW

(Cfm)

LOW SPEED HIGH SPEED

208 v 230, 460, 575 v 208 v 230, 460, 575 v

Esp Watts Esp Watts Esp Watts Esp Watts

900 0.54 253 0.57 277 0.55 307 0.60 363 1000 0.49 270 0.51 292 0.52 321 0.53 374 1100 0.43 287 0.45 307 0.46 335 0.49 385 1200 0.39 304 0.40 323 0.38 349 0.43 397 1300 0.33 321 0.35 338 0.35 364 0.36 408 1400 0.26 338 0.28 354 0.29 378 0.32 420 1500 0.21 355 0.23 369 0.24 392 0.25 431

LEGEND

Esp — External Static Pressure (in. wg) NOTES:

1. Values include losses for ﬁlters, unit casing, and wet coils.

be affected. For additional information on motor performance, refer to Table 4.

3. To convert watts to bhp: watts input x motor efficiency

bhp =

746

Motor efficiency = .63

Page 24

Table 13 — Fan Performance, 48TJE/TJF004 Horizontal Discharge Units;

Alternate Motor (Belt)

AIRFLOW

(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)

0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8

Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts

900 526 70 584 99 656 139 734 219 818 269 875 269 924 308 953 348 1000 570 109 627 149 738 189 800 259 848 288 895 308 936 348 977 388 1100 614 149 670 189 758 229 812 288 863 308 914 348 960 388 1005 428 1200 658 189 710 229 780 279 840 318 889 358 938 398 988 448 1038 497 1300 703 239 752 269 808 318 868 368 916 408 963 448 1012 507 1061 557 1400 725 288 776 308 845 378 891 418 937 467 983 507 1027 557 1071 597 1500 755 328 816 378 870 428 924 477 969 527 1014 577 1056 627 1097 676

AIRFLOW

(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)

0.9 1.0 1.1 1.2

Rpm Watts Rpm Watts Rpm Watts Rpm Watts

900 989 388 1028 438 1074 487 1120 537 1000 1020 438 1064 477 1124 537 1185 597 1100 1052 487 1100 527 1163 587 1225 647 1200 1076 527 1136 577 1201 647 1266 716 1300 1090 607 1172 647 1239 716 1306 786 1400 1108 666 1208 706 1278 786 1347 865 1500 1117 696 1245 776 1315 865 1385 955

NOTES:

1. Boldface indicates a ﬁeld-supplied drive is required. (See Note 4.)

2. Maximum usable watts input is 1000. Extensive motor and electrical testing on these units ensures that the full range of the motor can be utilized with conﬁdence. Using your fan motors up to the wattage ratings shown will not result in nuisance tripping or premature motor failure. Unit warranty will not be affected. For additional information on motor performance, refer to Table 4.

3. Values include losses for ﬁlters, unit casing, and wet coils.

4. Alternate motor drive range: 760 to 1090. All other rpms require ﬁeld-supplied drive.

5. To convert watts to bhp:

watts input x motor efficiency

bhp =

746

Motor efficiency = .75

Table 14 — Fan Performance, 48TJD/TJE/TJF005 Horizontal Discharge Units;

Standard Motor (Direct)

AIRFLOW

(Cfm)

LOW SPEED HIGH SPEED

208 v 230, 460, 575 v 208 v 230, 460, 575 v

Esp Watts Esp Watts Esp Watts Esp Watts

1200 0.75 458 0.81 506 0.87 572 0.92 632 1300 0.68 471 0.74 521 0.79 589 0.85 651 1400 0.60 503 0.66 556 0.71 616 0.77 681 1500 0.51 536 0.58 593 0.64 631 0.70 698 1600 0.42 557 0.49 616 0.56 654 0.63 723 1700 0.32 584 0.39 646 0.48 678 0.55 750 1800 0.21 610 0.29 674 0.41 698 0.48 772 1900 0.09 629 0.18 696 0.33 720 0.41 796 2000 — — 0.06 731 0.26 744 0.33 823

LEGEND

Esp — External Static Pressure (in. wg) NOTES:

1. Values include losses for ﬁlters, unit casing, and wet coils.

3. To convert watts to bhp: watts input x motor efficiency

bhp =

746

Motor efficiency = .66

Page 25

Table 15 — Fan Performance, 48TJD/TJE/TJF005 Horizontal Discharge Units;

Alternate Motor (Belt)

AIRFLOW

(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)

0.1 0.2 0.3 0.4 0.6 0.7 0.8 0.9 1.0

Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts

1300 569 189 641 242 701 299 761 357 859 483 901 546 943 609 987 652 1030 695 1400 604 231 673 294 731 352 788 410 887 546 928 615 968 683 1006 709 1044 736 1500 640 284 705 347 761 410 817 473 914 620 955 688 996 757 1033 797 1069 838 1600 676 336 738 399 793 468 847 536 940 683 982 767 1024 851 1060 891 1095 930 1700 713 399 772 462 825 536 877 609 967 767 1009 851 1051 935 1087 998 1123 1073 1800 750 473 806 536 857 615 908 693 997 851 1037 940 1077 1030 1114 1108 1151 1185 1900 788 546 841 620 890 704 939 788 1026 956 1065 1040 1104 1124 1141 1221 1178 1318 2000 826 630 876 714 924 799 971 883 1056 1061 1094 1151 1132 1240 1168 1371 1204 1502 2100 864 735 912 809 958 898 1004 988 1087 1177 1125 1271 1162 1366 1197 1485 1231 1604

AIRFLOW

(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)

1.1 1.2 1.4 1.6 1.8

Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts

1300 1068 792 1106 889 1134 998 1189 1138 1245 1358 1400 1086 833 1128 930 1183 1052 1226 1215 1297 1406 1500 1104 925 1139 1012 1218 1090 1286 1282 1320 1463 1600 1129 1022 1162 1114 1228 1186 1303 1339 1343 1530 1700 1156 1150 1188 1226 1250 1291 1319 1444 1382 1607 1800 1183 1262 1215 1339 1276 1415 1334 1569 1398 1722 1900 1211 1390 1243 1461 1303 1540 1359 1702 1418 1865 2000 1238 1548 1271 1594 1330 1664 1386 1846 1439 2018 2100 1265 1666 1298 1727 1358 1808 1413 1989 1466 2171

NOTES:

1. Boldface indicates a ﬁeld-supplied drive is required. (See Note 6.)

2. indicates ﬁeld-supplied motor and drive are required.

4. Values include losses for ﬁlters, unit casing, and wet coils.

5. Use of a ﬁeld-supplied motor may affect wire sizing. Contact Carrier representative to verify.

6. Alternate motor drive range: 840 to 1185. All other rpms require ﬁeld-supplied drive.

7. To convert watts to bhp:

watts input x motor efficiency

bhp =

746

Motor efficiency = .75

Table 16 — Fan Performance, 48TJD/TJE/TJF006 Horizontal Discharge Units;

Standard Motor (Direct)

AIRFLOW

(Cfm)

LOW SPEED MEDIUM SPEED HIGH SPEED

208 v 230, 460, 575 v 208 v 230, 460, 575 v 208 v 230, 460, 575 v

Esp Watts Esp Watts Esp Watts Esp Watts Esp Watts Esp Watts

1500 0.74 750 1.06 791 1.07 782 1.27 845 1.26 875 1.33 949 1600 0.54 780 0.90 824 0.92 821 1.13 883 1.14 913 1.22 988 1700 0.34 810 0.75 857 0.77 861 1.00 921 1.01 950 1.11 1027 1800 0.14 839 0.59 891 0.62 900 0.87 959 0.89 988 1.00 1066 1900 — — 0.44 924 0.47 940 0.74 997 0.77 1025 0.89 1105 2000 — — 0.28 957 0.32 979 0.61 1035 0.64 1063 0.78 1144 2100 — — 0.13 990 0.17 1018 0.48 1073 0.51 1101 0.67 1183 2200 — — — — 0.02 1058 0.35 1111 0.39 1138 0.56 1222 2300 — — — — — — 0.22 1149 0.26 1176 0.45 1261 2400 — — — — — — 0.09 1187 0.14 1213 0.34 1300 2500 — — — — — — — — — — 0.23 1340

LEGEND

Esp — External Static Pressure (in. wg) NOTES:

1. Values include losses for ﬁlters, unit casing, and wet coils.

3. To convert watts to bhp: watts input x motor efficiency

bhp =

746

Motor efficiency = .67

Page 26

Table 17 — Fan Performance, 48TJD/TJE/TJF006 Horizontal Discharge Units;

Alternate Motor (Belt)

AIRFLOW

(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)

0.1 0.2 0.4 0.6 0.8 1.0

Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts

1500 730 357 789 420 896 557 990 704 1072 872 1153 1051 1600 770 420 826 483 931 641 1020 788 1101 956 1178 1145 1700 811 494 865 567 966 725 1051 883 1133 1061 1205 1240 1800 852 578 905 651 1002 820 1084 977 1163 1156 1235 1355 1900 894 567 945 757 1037 925 1119 1093 1194 1271 1266 1471 2000 936 778 984 862 1072 1030 1154 1219 1226 1397 1297 1608 2100 978 893 1024 977 1108 1156 1192 1355 1259 1545 1327 1744 2200 1021 1019 1064 1103 1145 1282 1225 1503 1294 1702 1359 1902 2300 1064 1156 1104 1240 1183 1429 1260 1650 1330 1870 1392 2070 2400 1107 1303 1145 1387 1222 1524 1296 1818 1365 2038 1426 2259 2500 1150 1460 1186 1555 1262 1765 1331 1986 1400 2227 1461 2459

AIRFLOW

(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)

1.2 1.4 1.6 1.8

Rpm Watts Rpm Watts Rpm Watts Rpm Watts

1500 1221 1229 1256 1366 1283 1387 1303 1282 1600 1252 1334 1311 1524 1340 1660 1330 1692 1700 1278 1439 1345 1650 1397 1849 1424 1986 1800 1303 1555 1371 1776 1433 1996 1480 2196 1900 1330 1671 1396 1902 1460 2133 1517 2364 2000 1362 1818 1422 2038 1485 2270 1544 2522 2100 1393 1965 1452 2185 1510 2427 1570 2674 2200 1423 2122 1483 2354 1538 2585 1594 2821 2300 1454 2291 1515 2532 1571 2758 1623 2976 2400 1485 2480 1544 2721 1604 2947 1657 3152 2500 1518 2679 1574 2905 1633 3134 1692 3345

NOTES:

1. Boldface indicates a ﬁeld-supplied drive is required. (See Note 6.)

2. indicates ﬁeld-supplied motor and drive are required.

4. Values include losses for ﬁlters, unit casing, and wet coils.

5. Use of a ﬁeld-supplied motor may affect wire sizing. Contact Carrier representative to verify.

6. Alternate motor drive range: 900 to 1300. All other rpms require ﬁeld-supplied drive.

7. To convert watts to bhp:

watts input x motor efficiency

bhp =

746

Motor efficiency = .74

Table 18 — Fan Performance, 48TJD/TJE/TJF007 Horizontal Discharge Units;

Standard Motor (Belt)

AIRFLOW

(Cfm)

EXTERNAL STATIC PRESSURE (in. wg)

0.1 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6

Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts Rpm Watts

1800 885 623 942 700 1047 835 1139 956 1193 1031 1276 1165 1341 1250 1413 1378 1474 1404 1900 928 700 982 779 1084 932 1160 1006 1223 1114 1301 1233 1374 1361 1437 1439 1490 1482 2000 971 787 1022 867 1121 1014 1188 1097 1254 1216 1329 1284 1396 1473 1460 1491 1509 1569 2100 1015 891 1063 998 1140 1064 1196 1140 1272 1292 1354 1404 1413 1552 1475 1534 1529 1700 2200 1060 998 1104 1081 1159 1106 1229 1258 1306 1361 1363 1508 1434 1604 1487 1639 1554 1831 2300 1104 1123 1130 1140 1196 1224 1264 1387 1340 1473 1397 1648 1459 1665 1520 1831 1576 1980 2400 1138 1165 1174 1224 1245 1396 1305 1447 1373 1630 1440 1726 1502 1823 1552 1980 1604 2136 2500 1183 1275 1201 1335 1284 1465 1338 1552 1402 1761 1469 1805 1524 1980 1585 2136 1638 2292 2600 1210 1404 1246 1482 1312 1560 1366 1735 1435 1858 1494 1936 1552 2119 1616 2317 1671 2462 2700 1254 1560 1285 1595 1354 1726 1403 1892 1474 1954 1536 2171 1584 2300 1646 2487 1706 2653 2800 1274 1613 1304 1639 1374 1875 1459 1989 1514 2136 1570 2343 1624 2504 1677 2661 — — 2900 1318 1726 1345 1814 1412 2050 1496 2240 1529 2300 1603 2521 1671 2725 ———— 3000 1362 1945 1378 2032 1451 2119 1534 2343 1560 2470 1611 2648 1690 2886 ————

NOTES:

1. Boldface indicates a ﬁeld-supplied drive is required. (See Note 6.)

2. indicates ﬁeld-supplied motor and drive are required.

4. Values include losses for ﬁlters, unit casing, and wet coils.

5. Use of a ﬁeld-supplied motor may affect wire sizing. Contact Carrier representative to verify.

6. Standard motor drive range: 1070 to 1460. All other rpms require ﬁeld-supplied drive.

7. To convert watts to bhp:

watts input x motor efficiency

bhp =

746

Motor efficiency = .84

Page 27

START-UP

Unit Preparation —

Make sure that unit has been installed in accordance with these installation instructions and applicable codes.

Return-Air Filters — Make sure correct ﬁlters are in-

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

Compressor Mounting — Compressors are inter-

nally spring mounted. Do not loosen or remove compressor holddown bolts.

Internal Wiring — Check all electrical connections in

unit control boxes. Tighten as required.

Refrigerant Service Ports — To service refrigerant

service ports, remove refrigerant service port access panel. See Fig. 35. Each unit system has 4 Schrader-type service gage ports: one on the suction line, one on the liquid line, and two on the compressor discharge line. Be sure that caps on the ports are tight. When a controls upgrade package is used, one Schrader-type valve is located under both the highpressure switch and the low-pressure switch.

Cooling — Set space thermostat to OFF position. To start

unit, turn on main power supply. Set system selector switch at COOL position and fan switch at AUTO. position. Adjust thermostat to a setting below room temperature. Compressor starts on closure of contactor.

Check unit charge. Refer to Service, Refrigerant Charge

section, page 30.

Reset thermostat at a position above room temperature. Compressor will shut off. Evaporator fan will shut off after 30-second delay.

TO SHUT OFF UNIT — Set system selector switch at OFF position. Resetting thermostat at a position above room temperature shuts unit off temporarily until space temperature exceeds thermostat setting.

MainBurners — Main burners are factory set and should

require no adjustment. TO CHECK ignition of main burners and heating controls,

move thermostat set point above room temperature and verify that the burners light and evaporator fan is energized. After ensuring that the unit continues to heat the building, lower the thermostat setting below room temperature and verify that the burners and evaporator fan turn off. (Fan will turn off only if fan selector switch is in the AUTO. position.)

Refer to Table 19 for the correct oriﬁce to use at high

altitudes.

Table 19 — Altitude Compensation*

ELEVATION

(ft)

74,000 AND 115,000 BTUH

NOMINAL INPUT

150,000 BTUH

NOMINAL INPUT

Natural

Gas

Oriﬁce

Size†

Liquid

Propane

Oriﬁce

Size†

Natural

Gas

Oriﬁce

Size†

Liquid

Propane

Oriﬁce

Size†

0-2,000 33 45 30 38

2,000 34 46 30 39 3,000 35 47 31 40 4,000 36 47 32 41 5,000 36 47 33 42 6,000 37 48 34 43 7,000 37 48 35 43 8,000 38 49 36 44

9,000 39 49 37 44 10,000 41 50 38 45 11,000 43 50 39 45 12,000 44 51 40 46 13,000 44 51 41 47 14,000 45 52 42 47

*As the height above sea level increases, there is less oxygen per

cubic foot of air. Therefore, heat input rate should be reduced at higher altitudes.

†Oriﬁces available through your Carrier distributor.

Heating

1. Purge gas supply line of air by opening union ahead of gas valve. If gas odor is detected, tighten union and wait 5 minutes before proceeding.

2. Turn on electrical supply and manual gas valve.

3. Set system switch selector at HEAT position and fan switch at AUTO. or ON position. Set heating temperature lever above room temperature.

4. The induced draft motor will start.

5. After a call for heating, the main burners should light within 5 seconds. If the burner does not light, then there is a 22-second delay before another 5-second try. If the burner still does not light, the time delay is repeated. If the burner does not light within 15 minutes, there is a lockout. To reset the control, break the 24-v power to W1.

6. The evaporator-fan motor will turn on 45 seconds after the burners are ignited.

7. The evaporator-fan motor will turn off 45 seconds after thermostat temperature is satisﬁed.

8. Adjust airﬂow to obtain a temperature rise within the range speciﬁed on the unit nameplate.

NOTE: The default value for the evaporator-fan motor ON/OFF delay is 45 seconds. The Integrated Gas Unit Controller (IGC) modiﬁes this value when abnormal limit switch cycles occur. Based upon unit operating conditions, the ON delay can be reduced to 0 seconds and the OFF delay can be extended to 180 seconds. When one ﬂash of the LED is observed, the evaporator-fan ON/OFF delay has been modiﬁed.

If the limit switch trips at the start of the heating cycle during the evaporator ON delay, the time period of the ON delay for the next cycle will be 5 seconds less than the time at which the switch tripped. (Example: If the limit switch trips at 30 seconds, the evaporator-fan ON delay for the next cycle will occur at 25 seconds.) To prevent short-cycling, a 5-second reduction will only occur if a minimum of 10 minutes has elapsed since the last call for heating.

Fig. 35 — Cleaning Condenser Coil

Page 28

The evaporator-fan OFF delay can also be modiﬁed. Once the call for heating has ended, there is a 10-minute period during which the modiﬁcation can occur. If the limit switch trips during this period, the evaporator-fan OFF delay will increase by 15 seconds. A maximum of 9 trips can occur, extending the evaporator-fan OFF delay to 180 seconds.

To restore the original default value, reset the power to the unit.

TO SHUT OFF UNIT — Set system selector switch at OFF position. Resetting heating selector lever below room temperature will temporarily shut unit off until space temperature falls below thermostat setting.

Safety Relief — A soft solder joint at the suction service

Schrader port provides pressure relief under abnormal temperature and pressure conditions (i.e., ﬁre in building).

Ventilation (Continuous Fan) — Set fan and sys-

tem selector switches at ON and OFF positions, respectively. Evaporator fan operates continuously to provide constant air circulation. When the evaporator-fan selector switch is turned to the OFF position, there is a 30-second delay before the fan turns off.

Operating Sequence

COOLING, UNITS WITHOUT ECONOMIZER — When thermostat calls for cooling, terminals G and Y1 are energized, and the indoor (evaporator) fan motor (IFM), compressor,and outdoor (condenser) fan motor (OFM) start. The OFM runs continuously while the unit is in cooling. When the thermostat is satisﬁed, compressor contactor (C) is deenergized and the compressor and OFM shut off. After a 30-second delay, the IFM shuts off. If the thermostat fan selector switch is in the ON position, the evaporator motor will run continuously.

HEATING, UNITS WITHOUT ECONOMIZER — When the thermostat calls for heating, terminal W1 is energized. To prevent thermostat short-cycling, the unit is locked into the Heating mode for at least 1 minute when W1 is energized. The induced-draft motor is energized and the burner ignition sequence begins. The indoor (evaporator) fan motor (IFM) is energized 45 seconds after a ﬂame is ignited. On units equipped for two stages of heat, when additional heat is needed, W2 is energized and the high-ﬁre solenoid on the main gas valve (MGV) is energized. When the thermostat is satisﬁed and W1 is deenergized, the IFM stops after a 45-second time-off delay.

COOLING, UNITS WITH VARISLIDE™ ECONOMIZER — When the outdoor-air temperature is above the outdoorair thermostat (OAT) setting and the room thermostat calls for cooling, compressor contactor is energized to start compressor and the outdoor (condenser) fan motor (OFM). The indoor (evaporator) fan motor (IFM) is energized and the economizer damper moves to the minimum position. After the thermostat is satisﬁed, there is a 30-second delay before the evaporator fan turns off. The damper then moves to the fully closed position. When using continuous fan, the damper moves to the minimum position.

When the outdoor-air temperature is below the OAT setting and the thermostat calls for cooling, the economizer damper moves to the minimum position. If the supply-air temperature is above 57 F,the damper continue to open until it reaches the fully open position or until the supply-air temperature drops below 52 F.

When the supply-air temperature falls between 57 F and 52 F, the damper will remain at an intermediate open position. If the supply-air temperature falls below 52 F,thedamper will modulate closed until it reaches the minimum position or until the supply air temperature is above 52 F. When the thermostat is satisﬁed, the damper moves to the fully closed position when using AUTO. fan or to the minimum position when using continuous fan.

If the outdoor air alone cannot satisfy the cooling requirements of the conditioned space, economizer cooling is integrated with mechanical cooling, providing, two stages of cooling. Compressor and the condenser fan will be energized and the position of the economizer damper will be determined by the supply-air temperature. When the second stage of cooling is satisﬁed, the compressor and OFM will be deenergized. The damper position will be determined by the supply-air temperature. When the ﬁrst stage of cooling is satisﬁed, there is a 30-second delay before the evaporator fan shuts off.The damper then moves to the fully closed position. When using a continuous fan, the damper moves to the minimum position.

COOLING, UNITS WITH PARABLADE ECONOMIZER

− When the outdoor-air is above the enthalpy control setting and the room thermostat calls for cooling, the compressor contactor is energized to start the compressor and the outdoor (condenser) fan motor. The indoor (evaporator) fan motor is energized and the economizer damper moves to the minimum position. After the room thermostat is satisﬁed, the damper will spring return to the fully closed position.

When the outdoor-air is below the enthalpy control setting and the thermostat calls for cooling, the economizer outdoor-air damper is opened proportionally to maintain between 50 and 56 F at the mixed-air sensor.If outside air along cannot satisfy the cooling requirements, economizer cooling is integrated with mechanical cooling. When the room thermostat is satisﬁed, the damper will spring return to the fully closed position.

HEATING, UNITSWITH ECONOMIZER — When the thermostat calls for heating, terminal W1 is energized. To prevent thermostat short-cycling, the unit is locked into the Heating mode for at least 1 minute when W1 is energized.The induceddraft motor is energized and the burner ignition sequence begins. The indoor (evaporator) fan motor (IFM) is energized 45 seconds after a ﬂame is ignited and the damper moves to the minimum position. On units equipped for two stages of heat, when additional heat is needed, W2 energized and the high-ﬁre solenoid on the main gas valve (MGV) is energized. When the thermostat is satisﬁed and W1 is deenergized, the IFM stops after a 45-second time-off delay. The economizer damper then moves to the fully closed position. When using continuous fan, the damper will remain in the minimum position.

Page 29

SERVICE

When servicing unit, shut off all electrical power to unit to avoid shock hazard or injury from rotating parts.

Cleaning— Inspect unit interior at the beginning of heat-

ing and cooling season and as operating conditions require. EVAPORATOR COIL

1. Turn unit power off.Remove evaporator coil access panel.

2. If economizer is installed, remove economizer by disconnecting Molex plug and removing economizer mounting screws. Refer to accessory economizer installation instructions or Optional Economizer sections on pages 14 and 16 for more details.

3. Slide ﬁlters out of unit.

4. Clean coil using a commercial coil cleaner or dishwasher detergent in a pressurized spray canister. Wash both sides of coil and ﬂush with clean water. For best results, backﬂush toward return-air section to remove foreign material. Flush condensate pan after completion.

5. Reinstall economizer and ﬁlters.

6. Reconnect wiring.

7. Replace access panels.

CONDENSER COIL — Inspect coil monthly. Clean condenser coil annually, and as required by location and outdoor air conditions.

One-Row Coil Cleaning (sizes 004-006) — To access onerow coils, remove screws securing condenser-fan grille to condenser fan top cover. Place grille on top of condenser fan top cover as shown in Fig. 36. It is not necessary to remove the top cover.

Use a water hose or other suitable equipment to remove dirt and debris. Clean the outer surfaces with a stiff brush in the normal manner.

Reverse the procedure outlined above to reinstall the condenser-fan grille and condenser fan top cover.

2-Row Coil Cleaning (size 007) NOTE: Save all screws removed in this section. The screws

must be used when reinstalling the equipment.

1. T oaccess 2-row coils, remove screws securing condenserfan grille to condenser coil top cover. Place grille on top of condenser fan top cover as shown in Fig. 36 and 37. It is not necessary to remove the top cover.

2. Remove 3 screws on right side of compressor access panel. Remove one screw securing condenser coil top cover to compressor access panel. Remove lower screw securing condenser coil to compressor mounting plate.

3. Remove 4 screws securing control box access panel. Remove three screws (located in front of the control box access cover) securing condenser coil top cover.

4. Remove screws securing low-voltage access panel. Remove 2 screws inside low-voltage access panel. Tiltsheet metal (located on left side of low-voltage connections) back 45 degrees.

5. Remove screw securing refrigerant service port access panel.

6. Remove 2 wire ties securing 2-row coils together at hairpin end.

7. Remove screws securing two corner posts. Remove two corner posts.

8. Use right corner post to prop up right side of condenser coil top cover. Slide condenser coil partially out of condenser fan housing. See Fig. 37.

9. Use left corner post to prop up left side of condenser coil top cover.

10. Carefully separate the outer coil section 3 to 4 in. from the inner coil section. See Fig. 38.

11. Use a water hose or other suitable equipment to ﬂush down between the 2 coil sections to remove dirt and debris. Clean the outer surfaces with a stiff brush in the normal manner.

12. Secure inner and outer coils together with 2 wire ties.

13. Reposition the outer and inner coil section.

14. Reverse the procedure outlined above to reinstall equipment.

CONDENSATE DRAIN — Check and clean each year at start of cooling season. In winter, keep drain dry or protect against freeze-up.

FILTERS — Clean or replace at start of each heating and cooling season, or more often if operating conditions require it. Replacement ﬁlters must be same dimensions as original ﬁlters.

OUTDOOR-AIR INLET SCREENS — Clean screens with steam or hot water and a mild detergent. Do not use disposable ﬁlters in place of screens.

Fig. 36 — Coil Cleaning

Fig. 37 — Propping Up Condenser Coil

Top Cover

Page 30

Lubrication

COMPRESSORS — Each compressor is charged with the correct amount of oil at the factory.

FAN MOTOR BEARINGS — Fan motor bearings are of the permanently lubricated type. No further lubrication is required. No lubrication of condenser or evaporator fan motors is required.

ManualOutdoor-Air Damper— If outdoor-air damper

blade adjustment is required, see Manual Outdoor-Air Damper section on page 13.

EconomizerAdjustment— Refer to Optional Econo-

mizer sections on page 14 and 16.

Condenser-Fan Adjustment (Fig. 39) — Shut off

unit power supply. Remove condenser-fan assembly (grille, motor, and fan) and loosen fan hub setscrews. Adjust fan height as shown in Fig. 39. Tighten setscrews and replace condenser-fan assembly.

Refrigerant Charge — Amount of refrigerant charge

is listed on unit nameplate (also refer to Table 1). Refer to Carrier GTAC2-5 Charging, Recovery, Recycling, and Reclamation training manual and the following procedures.

Unit panels must be in place when unit is operating dur-

ing charging procedure. NO CHARGE — Use standard evacuating techniques. After

evacuating system, weigh in the speciﬁed amount of refrigerant. (Refer to Table 1.)

LOW-CHARGE COOLING — Using Cooling Charging Charts, Fig. 40-43, vary refrigerant until the conditions of the appropriate chart are met. Note the charging charts are differentfromtype normally used. Charts are based on charging the units to the correct superheat for the various operating conditions. Accurate pressure gage and temperature sensing device are required. Connect the pressure gage to the service port on the suction line. Mount the temperature sensing device on the suction line and insulate it so that outdoor ambient temperature does not affect the reading. Indoorair cfm must be within the normal operating range of the unit.

TO USE COOLING CHARGING CHART— Take the outdoor ambient temperature and read the suction pressure gage. Refer to chart to determine what suction temperature should be. If suction temperature is high, add refrigerant. If suction temperature is low, carefully recover some of the charge. Recheck the suction pressure as charge is adjusted.

EXAMPLE: (Fig. 42)

Outdoor Temperature ..........................85F

Suction Pressure ...........................80psig

Suction Temperature should be ..................60F

(Suction Temperature may vary 5 F.)

If Chargemaster® charging device is used, temperature and pressure readings must be accomplished using the charging chart.

Flue Gas Passageways — To inspect the ﬂue col-

lector box and upper areas of the heat exchanger:

1. Remove the combustion blower wheel and motor assem-

bly according to directions in Combustion-Air Blower section on page 32.

2. Remove the ﬂue cover to inspect the heat exchanger.

3. Clean all surfaces as required using a wire brush.

Fig. 38 — Separating Coil Sections

Fig. 39 — Condenser-Fan Adjustment

Page 31

Fig. 40 — Cooling Charging Chart, 48TJ004

Fig. 41 — Cooling Charging Chart, 48TJ005

Fig. 42 — Cooling Charging Chart, 48TJ006

Fig. 43 — Cooling Charging Chart, 48TJ007

Page 32

Combustion-Air Blower — Clean periodically to as-

sure proper airﬂow and heating efficiency. Inspect blower wheel every fall and periodically during heating season. For the ﬁrst heating season, inspect blower wheel bimonthly to determine proper cleaning frequency.

To access burner section, slide the sliding burner partition

out of the unit.

To inspect blower wheel, shine a ﬂashlight into drafthood opening. If cleaning is required, remove motor and wheel as follows:

1. Slide burner access panel out.

2. Remove the 7 screws that attach induced-draft motor hous-

ing to vestibule plate (Fig. 44).

3. The blower wheel can be cleaned at this point. If addi-

tional cleaning is required, continue with Steps 4 and 5.

4. To remove blower from the motor shaft, remove 2

setscrews.

5. To remove motor, remove the 4 screws that hold the

motor to mounting plate. Remove the motor cooling fan by removing one setscrew. Then remove nuts that hold motor to mounting plate.

6. To reinstall, reverse the procedure outlined above.

Limit Switch — Remove blower access panel (Fig. 6).

Limit switch is located on the fan deck.

Burner Ignition — Unit is equipped with a direct spark

ignition 100% lockout system. Integrated Gas Unit Controller (IGC) is located in the control box (Fig. 10). IGC contains a self-diagnostic LED (light-emitting diode). A single LED on the IGC provides a visual display of operational or sequential problems when the power supply is uninterrupted. When a break in power occurs, the IGC will be reset (resulting in a loss of fault history) and the indoor (evaporator) fan ON/OFF times will be reset. The LED error code can be observed through the viewport. During servicing refer to the label on the control box cover or Table 20 for an explanation of LED error code descriptions.

If lockout occurs, unit may be reset by interrupting power supply to unit for at least 5 seconds.

Table 20 — LED Error Code Description*

LED INDICATION ERROR CODE DESCRIPTION

ON Normal Operation

OFF Hardware Failure 1 Flash† Evaporator Fan On/Off Delay Modiﬁed 2 Flashes Limit Switch Fault 3 Flashes Flame Sense Fault 4 Flashes 4 Consecutive Limit Switch Faults 5 Flashes Ignition Lockout Fault 6 Flashes Induced-Draft Motor Fault 7 Flashes Rollout Switch Fault 8 Flashes Internal Control Fault

LEGEND

LED — Light-Emitting Diode

*A 3 second pause exists between LED error code ﬂashes. If more

than one error code exists, all applicable codes will be displayed in numerical sequence.

†Indicates a code that is not an error. The unit will continue to op-

erate when this code is displayed.

IMPORTANT: Refer to Troubleshooting Tables 21-25 for additional information.

Main Burners — To access burners, remove burner ac-

cess panel and slide out burner partition. See Fig. 9. At the beginning of each heating season, inspect for deterioration or blockage due to corrosion or other causes. Observe the main burner ﬂames and adjust, if necessary.

When working on gas train, do not hit or plug oriﬁce spuds.

REMOVAL AND REPLACEMENT OF GAS TRAIN (Fig. 44 - 46.)

1. Shut off manual gas valve.

2. Shut off power to unit.

3. Slide out burner partition. See Fig. 9.

4. Disconnect gas piping at unit gas valve.

5. Remove wires connected to gas valve. Mark each wire.

6. Remove ignitor wires and sensor wires at the Integrated Gas Unit Controller (IGC) (see Fig. 10).

7. Remove the 2 screws that attach the burner rack to the vestibule plate (Fig. 44).

8. Slide the burner tray out of the unit (Fig. 45).

9. To reinstall, reverse the procedure outlined above.

CLEANING AND ADJUSTMENT

1. Remove burner rack from unit as described in Removal and Replacement of Gas Train section, above.

2. Inspect burners; if dirty, remove burners from rack.

3. Using a soft brush clean burners and cross-over port as required.

4. Adjust spark gap. See Fig. 46.

5. Reinstall burners on rack.

6. Reinstall burner rack as described in Removal and Replacement of Gas Train section, above.

Replacement Parts — A complete list of replacement

parts may be obtained from any Carrier distributor upon request.

INDUCEDDRAFT MOTOR MOUNTING PLATE

INDUCEDDRAFT MOTOR

MANIFOLD PRESSURE TAP

VESTIBULE PLATE

FLUE EXHAUST

ROLLOUT SWITCH

BLOWER HOUSING

GAS VALVE

BURNER SECTION

Fig. 44 — Burner Section Details

Page 33

Fig. 45 — Burner Tray Details

Fig. 46 — Spark Adjustment

LOW HEAT

48TJE004, 48TJD005-007 — 74,000 BTUH INPUT

MEDIUM AND HIGH HEAT

48TJE005-007, 48TJF004 — 115,000 BTUH INPUT

48TJF005-007 — 150,000 BTUH INPUT

Page 34

TROUBLESHOOTING

Table 21 — LED Error Code Service Analysis

PROBLEM CAUSE REMEDY

Hardware failure. (LED OFF)

Loss of power to control module (IGC). Check 5 amp fuse on IGC, power to unit, 24-v circuit

breaker, and transformer. Units without a 24-v circuit breaker have an internal overload in the 24-v transformer. If the overload trips, allow 10 minutes for automatic reset.

Limit switch fault. (LED 2 ﬂashes)

High temperature limit switch is open. Check the operation of the indoor (evaporator) fan mo-

tor. Ensure that the supply-air temperature rise is in accordance with the range on the unit nameplate.

Flame sense fault. (LED 3 ﬂashes)

The IGC sensed ﬂame that should not be present.

Reset unit. If problem persists, replace control board.

4 consecutive limit switch trips. (LED 4 ﬂashes)

Inadequate airﬂow to unit. Check operation of indoor (evaporator) fan motor and

that supply-air temperature rise agrees with range on unit nameplate information.

Ignition lockout. (LED 5 ﬂashes)

Unit unsuccessfully attempted ignition for 15 minutes.

Check ignitor and ﬂame sensor electrode spacing, gaps, etc. Ensure that ﬂame sense and ignition wires are properly terminated. Verify that unit is obtaining proper amount of gas.

Induced-draft motor fault. (LED 6 ﬂashes)

IGC does not sense that induced-draft motor is operating.

Check for proper voltage. If motor is operating, check the speed sensor plug/IGC Terminal J2 connection. Proper connection: PIN 1 — White, PIN 2 — Red, PIN 3 — Black.

Rollout switch fault. (LED 7 ﬂashes)

Rollout switch has opened. Rollout switch will automatically reset, but IGC will con-

tinue to lockout unit. Check gas valve operation. Ensure that induced-draft blower wheel is properly secured to motor shaft. Reset unit at unit disconnect.

Internal control fault. (LED 8 ﬂashes)

Microprocessor has sensed an error in the software or hardware.

If error code is not cleared by resetting unit power, replace the IGC.

If the IGC must be replaced, be sure to ground yourself to dissipate any electrical charge that may be present before handling new control board. The IGC is sensitive to static electricity andmaybedamagedifthe necessary precautions are not taken.

IMPORTANT: Refer to Table 22 — Heating Service Analysis for additional troubleshooting analysis.

LEGEND

IGC — Integrated Gas Unit Controller LED — Light-Emitting Diode

Page 35

Table 22 — Heating Service Analysis

PROBLEM CAUSE REMEDY

Burners will not ignite. Misaligned spark electrodes. Check ﬂame ignition and sensor electrode positioning.

Adjust as needed.

No gas at main burners. Check gas line for air, purge as necessary. After purging

gas line of air, allow gas to dissipate for at least 5 minutes before attempting to relight unit.

Check gas valve. Water in gas line. Drain water and install drip leg to trap water. No power to furnace. Check power supply, fuses, wiring, and circuit breaker. No 24 v power supply to control circuit. Check transformer. Transformers with internal overcur-

rent protection require a cool down period before

resetting. Miswired or loose connections. Check all wiring and wire nut connections. Burned-out heat anticipator in thermostat. Replace thermostat. Broken thermostat wires. Run continuity check. Replace wires, if necessary.

Inadequate heating. Dirty air ﬁlter. Clean or replace ﬁlter as necessary.

Gas input to unit too low. Check gas pressure at manifold. Clock gas meter for

input. If too low, increase manifold pressure, or replace

with correct oriﬁces. Unit undersized for application. Replace with proper unit or add additional unit. Restricted airﬂow. Clean ﬁlter, replace ﬁlter, or remove any restrictions. Blower speed too low. Use high speed tap, increase fan speed, or install op-

tional blower, as suitable for individual units. Limit switch cycles main burners. Check rotation of blower, thermostat heat anticipator set-

tings, and temperature rise of unit. Adjust as needed. Too much outdoor air. Adjust minimum position.

Check economizer operation.

Poor ﬂame characteristics. Incomplete combustion (lack of combustion air)

results in: Aldehyde odors, CO, sooting ﬂame, or ﬂoating

ﬂame.

Check all screws around ﬂue outlets and burner com-

partment. Tighten as necessary.

Cracked heat exchanger.

Overﬁred unit — reduce input, change oriﬁces, or adjust

gas line or manifold pressure.

Check vent for restriction. Clean as necessary.

Check oriﬁce to burner alignment.

Burners will not turn off. Unit is locked into Heating mode for a one minute

minimum.

Wait until mandatory one minute time period has

elapsed or reset power to unit.

Page 36

Table 23 — Cooling Service Analysis

PROBLEM CAUSE REMEDY

Compressor and condenser fan will not start.

Power failure. Call power company. Fuse blown or circuit breaker tripped. Replace fuse or reset circuit breaker. Defective thermostat, contactor, transformer, or

control relay.

Replace component.

Insufficient line voltage. Determine cause and correct. Incorrect or faulty wiring. Check wiring diagram and rewire correctly. Thermostat setting too high. Lower thermostat setting below room temperature.

Compressor will not start but condenser fan runs.

Faulty wiring or loose connections in compressor circuit.

Check wiring and repair or replace.

Compressor motor burned out, seized, or internal overload open.

Determine cause. Replace compressor.

Defective run/start capacitor, overload, start relay. Determine cause and replace. One leg of three-phase power dead. Replace fuse or reset circuit breaker. Determine cause.

Compressor cycles (other than normally satisfying thermostat).

Refrigerant overcharge or undercharge. Recover refrigerant, evacuate system, and recharge to

nameplate. Defective compressor. Replace and determine cause. Insufficient line voltage. Determine cause and correct. Blocked condenser. Determine cause and correct. Defective run/start capacitor, overload, or start

relay.

Determine cause and replace. Defective thermostat. Replace thermostat.

Faulty condenser-fan motor or capacitor. Replace. Restriction in refrigerant system. Locate restriction and remove.

Compressor operates continuously.

Dirty air ﬁlter. Replace ﬁlter. Unit undersized for load. Decrease load or increase unit size. Thermostat set too low. Reset thermostat. Low refrigerant charge. Locate leak; repair and recharge. Leaking valves in compressor. Replace compressor. Air in system. Recover refrigerant, evacuate system, and recharge. Condenser coil dirty or restricted. Clean coil or remove restriction.

Excessive head pressure.

Dirty air ﬁlter. Replace ﬁlter. Dirty condenser coil. Clean coil. Refrigerant overcharged. Recover excess refrigerant. Air in system. Recover refrigerant, evacuate system, and recharge. Condenser air restricted or air short-cycling. Determine cause and correct.

Head pressure too low. Low refrigerant charge. Check for leaks; repair and recharge.

Compressor valves leaking. Replace compressor. Restriction in liquid tube. Remove restriction.

Excessive suction pressure.

High head load. Check for source and eliminate. Compressor valves leaking. Replace compressor. Refrigerant overcharged. Recover excess refrigerant.

Suction pressure too low. Dirty air ﬁlter. Replace ﬁlter.

Low refrigerant charge. Check for leaks; repair and recharge. Metering device or low side restricted. Remove source of restriction. Insufficient evaporator airﬂow. Increase air quantity. Check ﬁlter and replace if

necessary. Temperature too low in conditioned area. Reset thermostat. Outdoor ambient below 25 F. Install low-ambient kit.

Evaporator fan will not shut off.

Time off delay not ﬁnished. Wait for 30-second off delay.

Page 37

Table 24 — Varislide™ Economizer Troubleshooting

PROBLEM CAUSE REMEDY

Damper does not open.

Indoor (evaporator) fan is off. 1. Check to ensure that 24 vac is present at terminal C1 on the IFC or that

24 vac is present at the IFO terminal. Check whether 24 vac is present at PL6-1 (red wire) and/or PL6-3 (black wire). If 24 vac is not present, check wiring (see unit label diagram).

2. Check proper thermostat connection to G on the connection board.

No power to economizer motor.

1. Check that SW3 is properly making contact with the damper blade. Check that SW1 is in the NC (normally closed) position.

2. Check diode D18. If diode is not functioning properly, replace D18.

3. Conﬁrm that the economizer control board is grounded properly at PL6-4 (brown wire) and at brown terminal of the economizer control board (brown wire). The economizer motor must also be grounded properly at the negative motor terminal (brown wire).

4. Verify SW1 and SW3 are working and wired properly (see unit label diagram).

5. Check for 24 vac input at both PL6-1 (red wire) and PL6-3 (black wire). If 24 vac not present, check unit wiring (see unit label diagram). If 24 vac is found in both places, check for 24 vac at the yellow terminal of the economizer control board (yellow wire). If 24 vac power is not present, replace the economizer control board.

Economizer motor failure. If the indoor (evaporator) fan and economizer motor are energized, verify

that there is a minimum of 18 vdc at the positive motor terminal. If the motor is not operating, replace the motor.

Economizer operation limited to minimum position.

OAT or EC set too high. 1. Set at correct temperature (3 F below indoor space temperature).

2. Check OAT or EC by setting above outdoor temperature or humidity level. If the OAT or EC switches do not close, replace OAT or EC.

Verify economizer control board is correctly wired and works properly.

1. Perform the following tests when OAT or EC is closed, Y1 is called for and damper is at minimum position. Conﬁrm 24 vac on gray terminal of the economizer control board (gray wire). If 24 vac is not present, check wiring (see unit label diagram).

2. Verify that SW1 and SW3 are wired correctly and working properly (see unit label diagram).

3. Check to ensure that 24 vac exists at PL6-2 (blue wire). If 24 vac is not present, check wiring (see unit wiring label diagram).

4. Check 24 vac output at PL6-10 (white wire). If 24 vac is not present, replace economizer control board.

Check SAT. 1. After verifying that the OAT and EC settings and the economizer control

board wiring are correct, check to ensure that the 24 vac terminal of the SAT has 24 vac (white wire). If OAT, EC, and control board are functioning and wired properly and no 24 vac exists, check wiring (see unit label diagram).

2. If supply-air temperature is greater than 57 F, 24 vac should be found at terminal T2 on the SAT (pink wire). If 24 vac is not present, replace SAT.

Damper does not close.

Incorrect wiring of economizer.

1. Verify that SW2 and SW4 are wired and working properly (see unit label diagram.).

2. Check diode D19. If diode is not functioning properly, replace D19.

Verify economizer control board is functioning properly.

1. After verifying that the wiring is correct, modulate the damper to the minimum position. Remove the calls for G.

2. If the damper does not move, check for 24 vac at PL6-1 (red wire). If 24 vac is not present, check wiring (see unit label diagram).

3. If damper still does not move, check for 24 vac at blue terminal of economizer control board (blue wire). If 24 vac is not present, replace the economizer circuit board.

Check SAT. 1. After verifying that the wiring is correct and the economizer control board

is functioning properly, place the OAT or EC switch in the closed position. Place a call for Y1 and open the damper to the fully open position. Conﬁrm that the 24 vac terminal of the SAT has 24 vac (white wire). If 24 vac is not present, check wiring (see unit label diagram).

2. If supply-air temperature is less than 52 F, 24 vac should be found at terminal T1 on the SAT (violet wire). If 24 vac not found, replace SAT.

Economizer motor failure. If economizer control board and SAT are functioning properly, verify that

there is a minimum of 18 vdc at the positive motor terminal. If a minimum of 18 vdc is present and the motor is still not operating, replace the motor.

Economizer damper does not close on power loss.

Verify that close-on-power-loss and economizer control board are functioning properly.

1. Check voltage potential across batteries. If lower than 14 vdc, replace close-on-power-loss power supply (9-v alkaline batteries). It is recommended that you check this emergency power supply on a regular basis or whenever the ﬁlters are changed.

2. If the close-on-power-loss and economizer control board are functioning properly, check for 14 vdc or higher at the blue terminal of the economizer control board (blue wire) when power is disconnected from unit. If 14 vdc is not present, replace the control board.

LEGEND

C1 — Common Power EC — Enthalpy Control IFC — Indoor (Evaporator) Fan Contactor IFO — Indoor (Evaporator) Fan On OAT — Outdoor-Air Thermostat PL — Plug SAT — Supply-Air Thermostat SW — Economizer Position Switch vac — Volts Alternating Current vdc — Volts Direct Current

Page 38

Table 25 — PARABLADE Economizer Troubleshooting

PROBLEM CAUSE REMEDY

Damper does not open. Evaporator fan not on. Check wiring between G on connection board and indoor fan

contactor.

No power to economizer motor.

1. Disconnect power at TR and TR1. Disconnect jumper across P and P1.

2. Connect jumper across TR and 1.

3. Connect jumper across T1 and T.

4. If connected, remove enthalpy sensor from terminals S

and +.

5. Apply power (24 vac) to terminals TR and TR1. The LED should be off and the damper should be in the closed position.

6. Disconnect the factory-installed 620 ohm resistor from terminals SRand +. The LED should light up and the motor should drive toward open. If this does not happen, replace the economizer control module.

Economizer motor failure. If the indoor (evaporator) fan and economizer motor are energized,

verify that there is a minimum of 24 vac at terminals TR and TR1. If the motor is not operating, replace the motor.

Economizer operation limited to minimum position.

Economizer control module failure.

1. To simulate high or low enthalpy, reconnect the factory-installed 620 ohm resistor across terminals SRand +.

2. Connect 1.2 Kohm checkout resistor across terminals SOand +. Turn the enthalpy set point to ‘‘A.’’ The LED should turn on, indicating low enthalpy. The motor should drive toward open. If LED does not light, replace module. If motor does not drive open, check motor operation.

3. Turn the enthalpy set point to ‘‘D.’’ The LED should turn off, indicating high enthalpy. The motor should drive toward closed. If these actions do not occur, replace module.

4. Disconnect 1.2 Kohm checkout resistor before resuming operation.

Damper does not close. No power to economizer. 1. Disconnect power at TR and TR1. Disconnect jumper across P

and P1.

2. Connect jumper across TR and 1.

3. Connect jumper across T1 and T.

4. If connected, remove enthalpy sensor from terminals SOand +. Factory-installed 620 ohm resistor should be connected to terminals SRand +.

5. Apply power (24 vac) to terminals TR and TR1. The LED should be off and the damper should be in the closed position.

Spring return failure. If power to unit is off and damper does not close, check for a bound

linkage. If linkage is not bound, then internal spring may be broken. Replace actuator.

Economizer motor failure. If the economizer control module is functioning properly, verify that

there is a minimum of 24 vac at terminals TR and TR1. If the motor is not operating, replace the motor.

Damper does not open or close according to enthalpy readings.

Sensor incorrectly wired or bad.

To verify sensor operation, reconnect the + lead of the outdoor enthalpy sensor to the + terminal of the economizer control module. Connect a DC milliammeter between terminals SOof the economizer control module and terminals S of the enthalpy sensor. The milliammeter should indicate between 3 and 25 mA if the sensor is operating properly. If the milliammeter indicates 0, the sensor may be wired backwards. If any other readings are shown, replace the sensor.

LEGEND

LED — Light-Emitting Diode

Page 39

LEGEND FOR FIG. 47 — TYPICAL WIRING SCHEMATIC AND COMPONENT ARRANGEMENT

IMPORTANT: Refer to unit wiring label for actual unit wiring information.

AHA — Adjustable Heat Anticipator C—Contactor, Compressor CAP — Capacitor CC — Cooling Compensator CH — Crankcase Heater COMP — Compressor Motor D—Diode EC — Enthalpy Control ECON — Economizer EPS — Emergency Power Supply

(Nine Volt Battery)

EQUIP — Equipment ER — Economizer Relay FPT — Freeze Up Protection Thermostat GND — Ground HPS — High-Pressure Switch HS — Hall-Effect Sensor I—Ignitor IDM — Induced-Draft Motor IFM — Indoor (Evaporator) Fan Motor IGC — Integrated Gas Unit Controller LPS — Low-Pressure/Loss-of-Charge Switch LS — Limit Switch MGV — Main Gas Valve MTR — Motor OAT — Outdoor-Air Thermostat OFM — Outdoor (Condenser) Fan Motor P—Plug PL — Plug Assembly QT — Quadruple Terminal R—Relay

NOTES:

1. If any of the original wire furnished must be replaced, it must be replaced with type 90 C wire or its equivalent.

2. Three-phase motors are protected under primary single-phasing conditions.

3. Thermostat: HH07AT170, 172, 174 and P272-2783 Subbase: HH93AZ176, 178 and P272-1882, 1883.

RS — Rollout Switch SAT — Supply Air Thermostat SEN — Sensor SW1 — Switch Fully Open SW2 — Switch Fully Closed SW3 — Switch Min. Vent Position SW4 — Switch Max. Vent Position TC — Thermostat-Cooling TH — Thermostat-Heating TRAN — Transformer

Field Splice Marked Wire

Terminal (Marked) Terminal (Unmarked)

Terminal Block Splice

Splice (Marked) Factory Wiring

Field Control Wiring Field Power Wiring Accessory or Optional Wiring To indicate common potential only;

not to represent wiring.

4. Set heat anticipator at .14 amp. For units with 2 stages of heating, set stage two anticipator at .14 amp.

5. Use copper conductors only.

6. TRAN is wired for 230-v unit. If unit is to be run with 208-v power supply,disconnect BLK wire from 230-v tap (ORN) and connect to 208-v tap (RED). Insulate end of 230-v tap.

Page 40

Fig. 47 — Typical Wiring Diagram and Component Arrangement

Page 41

Page 42

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

Book 1 4 Tab 1a 6a

PC 111 Catalog No. 534-852 Printed in U.S.A. Form 48TJ-9SI Pg 42 8-95 Replaces: 48TJ-3SI

Page 43

Page 44

START-UP CHECKLIST

(Remove and Use in Job File)

I. PRELIMINARY INFORMATION:

MODEL NO.: DATE:

SERIAL NO.: TECHNICIAN:

II. PRE-START-UP (insert checkmark in box as each item is completed)

M VERIFY THAT ALL PACKING MATERIALS HAVE BEEN REMOVED FROM UNIT M REMOVE ALL SHIPPING HOLDDOWN BOLTS AND BRACKETS PER INSTALLATION INSTRUCTIONS M VERIFY THAT CONDENSATE CONNECTION IS INSTALLED PER INSTALLATION INSTRUCTIONS M CHECK ALL ELECTRICAL CONNECTIONS AND TERMINALS FOR TIGHTNESS M CHECK GAS PIPING FOR LEAKS M CHECK THAT INDOOR- AIR FILTER IS CLEAN AND IN PLACE M VERIFY THAT UNIT INSTALLATION IS LEVEL M CHECK FAN WHEEL AND PROPELLER FOR LOCATION IN HOUSING/ORIFICE AND SETSCREW

TIGHTNESS

III. START-UP:

ELECTRICAL

SUPPLY VOLTAGE L1-L2

L2-L3 L3-L1 COMPRESSOR AMPS L1 L2 L3 INDOOR-FAN AMPS L1 L2 L3

TEMPERATURES

OUTDOOR-AIR TEMPERATURE

RETURN-AIR TEMPERATURE

DB WB COOLING SUPPLYAIR GAS HEAT SUPPLYAIR

PRESSURES

GAS INLET PRESSURE

IN. WG GAS MANIFOLD PRESSURE

IN. WG (HI FIRE) REFRIGERANT SUCTION

PSIG REFRIGERANT DISCHARGE

PSIG

M VERIFY REFRIGERANT CHARGE USING CHARGING TABLES

........................................................................................

CUT ALONG DOTTEDLINE

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

Book 1 4 Tab 1a 6a

PC 111 Catalog No. 534-852 Printed in U.S.A. Form 48TJ-9SI Pg CL-1 8-95 Replaces: 48TJ-3SI