Carrier 50LJ- Manuals

Carrier 50LJ– User Manual, Manual in PDF format online.

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User Manual
Manual

User Manual Carrier 50LJ

Summary

Page 3 - A CAUTION; NOTICE TO RIGGERS; Lb; Fig. 1 — Rigging Labei; Field-Fabricated Ductwork

f 1 Rig with 4 cables and spread with two 95-in. (2413-mm) and 2 “A” long suitable spreader bars. 2 Center of gravity and unit weight include economizer, but not econ omizer hood NOTES: A CAUTION 1 All panels must be in place when rigging. 2. Unit is not designed for handling by forklift truck. 3/4...

Page 4 - Table 1a — Physical Data, 48LJ Units; R-22 Controlled by AcutrolTM Metering Device

Table 1a — Physical Data, 48LJ Units BASE UNIT 48LJ D024 E024 NOMINAL CAPACITY (tons) lb 20 20 OPERATING WEIGHT (lb)* 2895 2975 COMPRESSORS (2 each unit) Capacity Steps (%) Hermetric, 3600 Rpm 50, 100 REFRIGERANT Operating Charge (lb), Sys 1/Sys 2 R-22 Controlled by Acutrol™ Metering Device 16 0/16....

Page 6 - A 90 degree return duct elbow shall be provided for vertical

1. Roofcurb accessory 50DJ900401 is shipped disassembled. 2. Dimensions in ( ) are in millimeters. 3 Roofcurb: 16 gage steel. 4. A 90 degree return duct elbow shall be provided for vertical NOTES: Fig. 2a — Roof Curb Details, 48LJ/50LW024 Units

Page 8 - UNIT; 'From edge of unit to horizontal; Fig. 3 — Unit Leveling Tolerances; Condensate Drain; Fig. 4 — Condensate Drain Piping Details

NOTE: To prevent the hazard of stagnant water build-up in the drain pan of the evaporator section, unit can only be pitched as shown. See Table 1 for allowable B tolerances. DIMENSIONS (degrees and In.) UNIT B C D Deg In.* Deg In.* Deg In.* 48U 1 38 4.00 50LJ 1.00 3.25 .50 .75 .50 .75 50LW 1.38 4.00...

Page 9 - UNIT SIZE

UNIT SIZE WEIGHT* A B C D E F G Lb Kg mm Ft-in. mm Ft-in. mm Ft-in. mm Ft-in. mm Ft-in. mm Ft-in. mm Ft-in. 48LJD024 2895 1313.0 1813 6-1% 2182 7-1% 682 2-2% 3909 12-9% 534 1-9 2187 7-2%4 807 2-7% 48LJE024 2975 1349.4 1813 6-1% 2182 7-1% 682 2-2% 3909 12-9% 534 1-9 2187 7-2%4 807 2-7% ‘See note 9. N...

Page 10 - Fig. 5b — Base Unit Dimensions, 50LJ024 Units

UNIT SIZE WEIGHr A B C D E F Lb Kg mm Ft-ln. mm Ft-in mm Ft-in. mm Ft-in. mm Ft-in mm Ft-in. 50LJ024 2565 1163.5 1556 5-1V4 1680 5-6V8 3141 10-3'Vi 6 526 1-8"/i6 807 2-7% 2048 6-8% *See note 10 NOTES: 1. Dimensions in [ ] are in miiiimeters. Center of gravity. 3. Allow 12'-0" [3658] at top a...

Page 12 - Fig. 6 — Enthalpy Sensor; Fig. 7 — Enthalpy Sensor Location; Install Outdoor-Air Hoods; pj; Position Adjustments (Top of Economizer Motor)

Fig. 6 — Enthalpy Sensor ENTHALPY SENSOR Fig. 7 — Enthalpy Sensor Location ■CONNECTOR -ENTHALPY -MINIMUM POSITION (CLOCKWISE TO INCREASE) Fig. 9 — Setting "A" Operating Conditions Install Outdoor-Air Hoods ECONOMIZER HOODS — These hoods are shipped sep arately from the base unit in a carton...

Page 13 - CAUTION; Fig. 10 — Economizer Hood Assembly Holes

f IMPORTANT: If unit is to be equipped with either barometric relief or power exhaust, the barometric relief/power exhaust hood must be in stalled prior to the installation of the economizer hoods. If installing barometric relief or power exhaust, proceed to the next section (Barometric Relief/Pow...

Page 14 - Fig. 12 — Power Exhaust/Barometric Relief Hood; Field Wire Routing

BAROMETRIC RELIEF/POWER EXHAUST HOOD - The same hood is used for barometric relief and power exhaust, and is shipped separately from the base unit, in cartons marked 50DJ900371. Barometric relief can only be unit mounted on vertical supply/return units (48/50LJ). It may be duct mounted on horizontal...

Page 15 - Field Electrical Connections; Full Load Amps; LEGEND; Maximum Overcurrent Protection

terminals on terminal blocks. See control wiring section on page 17.ROUTING THROUGH SIDE OF UNIT - When 200-amp or smaller disconnect is used, route power wiring in field-supplied watertight conduit into unit through 3Vs in. knockout. Strain relief (field supplied) must be used in knock out. When 4...

Page 17 - EQUIP; — Equipment; GND; — Ground; NEC; — National Electrical Code; TB; — Terminal Block; Fig. 13 — Field Power Wiring Connections; 15-V Connection: Convenience outlet can be mounted on

TBI EQUIP GND EQUIP — Equipment GND — Ground LEGEND NEC — National Electrical Code TB — Terminal Block Fig. 13 — Field Power Wiring Connections CONTROL WIRING — Install a Carrier-approved acces sory thermostat assembly according to the installation instructions shipped with the accessory. Locate th...

Page 19 - mm; G A S S E C T I O

"1 ECONOMIZER MOTOR <n> <S €1> <S> €3 (&> G> o mm <D <±> <l> O D№ RED Y^L B^U < 3 > O OO €9 t— econom : <r> <±> r OPT < 2 > ® \ M_____ V DMS ^____ o <D G A S S E C T I O N <[» €3 <D O (U LSI Q> <3><2>® <...

Page 20 - Fig. 15 - Field Control Thermostat Wiring; CONVENIENCE; Fig. 16 — Field Wiring for Building Pressurization

LOW-VOLTAGE TERMINAL BLOCK IN UNIT CONTROL BOX (PI) THERMOSTAT/ SUBBASE r- 0 &—J r~@---------------' f[wi]--------------- 1 ^------------------------ 1 [ y 3---------------------- &------------------------------- 0------------------------ &-------------------- --------------------g------...

Page 21 - Installation Locations for Flue Hood Assemblies; NOTE: Numbers in ( ) refer to type of hood to install in location; Fig. 19 — Flue Hood Details

i(f Gas Piping — Unit is equipped for use with natural gas only. Installation must conform to local building codes, or in the absence of local codes, with the NFGC (National Fuel Gas Code), ANSI (American National Standards Institute) Z223.1-1984. A '/sin. NPT tapping plug, accessible for test gage ...

Page 22 - Table 5 — Air Quantity Limits; Condenser Fans and Motors; Table 4 — Evaporator-Fan Pulley Data

Approved oils: Witco Co............................................................. Suniso 3GSTexaco, Inc....................................................Capella WF-32 Do not use drained oil and do not use any oil that has been exposed to the atmosphere. Unit Voltage — Be sure power source agree...

Page 26 - Fig. 23 — Combustion Blower Removal; Cleaning; Multifak 2; Fig. 24 — Typical Electric Heat Control Box; ’Preferred lubricant because it contains rust and oxidation; Adjustments

V I E W A - A BURNER SECTION Fig. 22 - Gas Section Detaii, 48LJE (High Heat) Fig. 23 — Combustion Blower Removal LEGEND F B — Fuse Block F U - Fuse H C - Heater Contactor ELECTRIC HEAT BOX ECONOMIZER DAMPER MOTOR — On units so equipped, the economizer motor is located on a bracket in the return- air...

Page 29 - Fig. 28 — Auxiliary Switch Stroke Adjustment; Refrigerant Feed Components

ENTHALPY CONTROL, MAT, AND ECONOMIZER DAMPER VENT POSITION — See Installation section of this publication for adjustment procedures. AUXILIARY SWITCH — All units have an auxiliary switch located on the economizer damper motor. This switch is factory set to prevent the power exhaust from operating wh...

Page 30 - UJ; cc; Fig. 30 — Charging Chart; Relief Devices

6 8 9 6 2 1 3 ^ 5 2 o in ¡4 8 3 UJ cc S 4 1 4 in cc Q. 2 3 4 5 z o 5 2 7 6 : d in 2 0 7 1 1 1 M 1 1 O U T D O O R T E M P F C 1 1 5 4 6 1 0 5 4 1 9 5 3 5 8 5 2 9 7 5 2 4 6 5 1 8 5 5 1 3 4 5 7 ?" ina. 2= y' > ' a: 13 in in 1 > " 1 X' > « ? z _J y orj in 3 5 0 4 J C T IO N L 0 5 N E T...

Page 31 - Fig. 32 — Location of Rollout Switch Capillary Tube; Electric Heat; DAHGER

Fig. 32 — Location of Rollout Switch Capillary Tube Electric Heat OVERCURRENT — Heaters are protected by fuses in the power circuit, located in the heater control box. As with circuit breakers, determine the cause of fuses tripping be fore replacing them. Do no replace with larger fuses. All fuses ...

Page 32 - P I

P I Symptom: Evaporator Fan Will Not Operate. 1. Turn unit power off and disconnect plug PI from the control board. 2. Install a jumper across Pin R and Pin G at plug PI on the control board. 3. Turn unit power on and check if the evaporator-fan con tactor (IFC) coil has been pulled in. If the cont...

Page 33 - S y m p to m : C o m p re sso r N o . 2 W ill N o t O p e ra te .

8 . To verify compressor lockout logic: a. Disconnect CLO sensor wires connected to CLOl at the control board. Check wires for continuity. If there is no continuity, replace the sensor. b. Connect the multimeter to read voltage between Pin X at plug PI and ground. c. Turn unit power on and check the...

Page 34 - . T o v e rify c o m p re sso r lo c k o u t lo g ic

a. Disconnect CLO sensor wires connected to CL02 at the control board. Check wires for continuity. If there is no continuity, replace the sensor. b. Connect the multimeter to read voltage between Pin X on plug PI and ground. c. Turn unit power on and check the multimeter. Within a few seconds the me...

Page 35 - LEGEND AND NOTES FOR FIG. 36 AND 37; SEN; NOTES; If any of the original wire furnished must be replaeed,

LEGEND AND NOTES FOR FIG. 36 AND 37 AFS — Airflow Switch 1 — APS — Air Pressure Switch ICP — C — Contactor, Compressor IDC — CB — Circuit Breaker IDM — CCB — Control Circuit Breaker IFC — CH — Crankcase Heater CLO — Compressor Lockout IFCB — COMP — Compressor Motor CS — Centrifugal Switch IFM — CV —...

Page 37 - S C H E M A T I C; Fig. 37 — Typical Wirini

Page 38 - li

li Copyright 1992 Carrier Corporation Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations. Book 11 11 PC 111 Catalog No. 564-937 Printed in USA Form 48/50LJ,LW—2SI Pg 37 2-92 Replaces: 48/50LJ,LW-1 SI Tab l...