Carrier 48LJD- Manuals

Carrier 48LJD– User Manual, Manual in PDF format online.

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User Manual
Manual

User Manual Carrier 48LJD

Summary

Page 2 - CAUTION

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 ap plicable fire codes. A minimum clearance is not required around ductwork. Cabinet retur...

Page 3 - Fig. 2 — Roof Curb Dimensions

ROOF CURB ACCESSORY A UNIT SIZE c 50DJ900771 1 '-2” [356] 48LJE/LJF004 — !J ------------------ —1------------------- - 1 50DJ900781 2"-0' [610] 48UD/LJE/UF005-007 NOTES: 1. Roof curb accessory is shipped unassembled 2. Insulated panels.3 Dimensions in [ ] are in millimeters 4. Roof Curb: galvani...

Page 4 - MAXIMUM ALLOWABLE; Fig. 3 — Unit Leveling Tolerances; NOTE: Trap should be deep enough to offset maximum unit static; Fig. 4 — External Trap Condensate Drain; PLACE ALL SEAL STRIPS; Hook rigging shackles through holes in base rail, as shown in de; A CAUTION; All panels must be in place when rigging.; Fig. 5 — Rigging Details

MAXIMUM ALLOWABLE DIFFERENCE (in.) A-B B-C A-C 0.5 1.0 1.0 Fig. 3 — Unit Leveling Tolerances /■ NOTE: Trap should be deep enough to offset maximum unit static difference, A 4-in. trap is recom m ended. Fig. 4 — External Trap Condensate Drain PLACE ALL SEAL STRIPS IN PLACE BEFORE PLACING UNIT ON ROOF...

Page 5 - Table 1 — Physical Data

Table 1 — Physical Data BASE UNIT 48 LJE/LJF004 LJD/LJE/LJF005 LJD/LJE/LJF006 LJD/LJE/LJF007 NOMINAL CAPACITY (tons) 3 4 5 6 OPERATING WEIGHT (lb) Unit 530 540 560 615 E co n om ize r 34 34 34 34 Roof Curb 115 115 115 115 COMPRESSOR Reciprocating Scroil Reciprocating Quantity 1 1 1 1 Oil (oz) 55 55 ...

Page 6 - Connection Sizes; LEFT SIDE; Fig. 6 — Base Unit Dimensions

U N IT S T D U N IT W E IG H T E C O N O M IZ E R W E IG H T C O R N E R W E IG H T (A ) C O R N E R W E IG H T (B ) L b K g L b K g L b K g L b K g 48 L JE /L JF 0 04 53 0 24 0 34 15 .4 10 4 47 .2 97 44 .0 48 L JD /L JE /U F 00 5 54 0 24 5 34 15 .4 10 6 48 1 98 44 .5 48 U D /U E /U F 0 06 56 0 25 4...

Page 7 - LEGEND; Step 7 — Make Electrical Connections; A WARNING; Do not use gas piping as an electrical ground.; Fig. 8 — Gas Piping Guide (With Accessory; must

i ' Step 5 — Install Flue Hood — Flue hood and screen are 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...

Page 8 - Table 2 — Electrical Data

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 48LJE/LJF004 (3 Tons) 208/230-1-60 Std 187 254 179 93 1 9 2.8 57 27 1/27 1 35/35 26/26 105/105 Alt 3.8 28.1/28 1 ...

Page 10 - Fig. 12 — Damper Panel with Manual Outdoor-Air

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

Page 11 - m m; Fig. 17 — Access Panel Location; Do; HOOD SIDES AND TOP ASSEMBLED

TWO-POSITION DAMPER - The outdoor-air hood and screen are attached to the basepan at the bottom of the unit. Assembly: 1. Determine quantity of ventilation air required for build ing. Record amount of air for use in Step 9. 2. Remove and save evaporator coil access panel and screws. See Fig. 16. 3....

Page 12 - Fig. 19 — Economizer Installed in Unit; Fig. 21 — Horizontal Discharge Block-Off Plate

d. Install horizontal discharge block-off plate over opening on the access panel. Block-off plate MUST be installed before installing hood assembly (see Fig. 21). NOTE: Install spacers at the same time as the hori zontal block-off plate using same screws. The spac ers are used to cover gaps betwee...

Page 13 - Fig. 22 — Economizer Damper Minimum Position Setting; Step 9 — Adjust Evaporator-Fan Speed

OUTDOOR AIRFLOW (cfm x 100) Example: Given — Return-Air Negative Static Pressure .........................0 2 in wg Outdoor Air ...................................................... 900 cfm Determine — Setting = 5 Fig. 22 — Economizer Damper Minimum Position Setting Fig. 23 - Minimum Position Dampe...

Page 14 - Fig. 25 — Wiring Connections for; ieiATe N U T S J; Enthalpy Control Installation

OAT OR ACCESSORY ENTHALPYCONTROL GRAY--------------- --------------------------------------- ORANGE- Fig. 25 — Wiring Connections for Outdoor-Air Thermostat ■i\fcTOR MOUNTffviS ieiATe N U T S J ASS v A v A'A'M v . "ERMWALS Fig. 26 - Belt Drive Motor Mounting bUTOObR-AiRTHERMOStATl (TERMiNAl-S AR...

Page 15 - Table 3 — Fan Rpm at Motor Pulley Settings; Table 4 — Fan Performance, 48LJE/LJF004 Vertical; Table 5 — Fan Performance, 48LJE/LJF004 — Vertical; — Brake Horsepower

Table 3 — Fan Rpm at Motor Pulley Settings UNIT MOTOR PULLEY TURNS OPEN 48LJD/LJE 0 Va 1 IVa 2 2Va 3 3Va 4 4Va 5 005* 1310 1285 1245 1210 1175 1140 1110 1075 1040 1005 970 006 1300 1260 1220 1180 1140 1100 1060 1020 980 940 900 007 1460 1420 1380 1340 1300 1265 1230 1190 1150 1110 1070 'Indicates al...

Page 16 - Table 6 — Fan Performance, 48LJD/LJE/LJF005 Vertical Discharge

Table 6 — Fan Performance, 48LJD/LJE/LJF005 Vertical Discharge Units; Standard Motor (Direct) AIRFLOW (Cfm) LOW SPEED HIGH SPEED 208 230, 460, 575 208 230, 460, 575 ESP Bhp ESP Bhp ESP Bhp ESP Bhp 1200 0.53 0.44 0 58 0 48 0 72 0.56 0.84 0 65 1300 0 44 0,48 0.50 0.50 0 64 0.60 0.75 0.68 1400 0.35 0.5...

Page 20 - Table 16 — Altitude Compensation*; *As the height above sea level; cubic foot of air Therefore, heat input rate should be reduced at

START-UP IMPORTANT: Energize crankcase heater 24 hours prior to base unit start-up to remove absorbed refrigerant from oil to prevent damage to compressor. Heater is energized as long as there is power to the unit. Unit Preparation — Make sure that unit has been in stalled in accordance with these ...

Page 21 - SERVICE; Â CAUTION; Cleaning

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 ener gized. The induced-draft motor is energized and the burner ignition sequence begin...

Page 22 - Two-Position Damper —; TOP VIEW

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. Manual Outdoor-Ai...

Page 23 - ft; JCTiON; RATURE

LOW CHARGE COOLING — Using Cooling Charging Charts, Fig. 32-35, vary refrigerant until the conditions of the appropriate chart are met. Note the charging charts are different from type normally used. Charts are based on charging the units to the correct superheat for the various operating conditio...

Page 24 - Fig. 36 — Burner Section Details

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 below. 2. Remove the 3 screws holding the blower housing to the flue cover. 3. Remove ...

Page 26 - TROUBLESHOOTING; Table 18 — LED Error Code Service Analysis

TROUBLESHOOTING Table 18 — 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 internai overload in the 24 v...

Page 27 - Table 19 - Heating Service Analysis

Table 19 - 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 diss...

Page 28 - Table 20 — Cooling Service Analysis

Table 20 — Cooling Service Analysis PROBLEM CAUSE REMEDY Compressor and con- denser 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. I...

Page 30 - C O M P O N E N T A R R A N G E M E N T; Fig. 39 — Typical Component Arrangement

C O M P O N E N T A R R A N G E M E N T u> o Fig. 39 — Typical Component Arrangement

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