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Manuals
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Carrier Manuals
Air Conditioner
48LJ
Installation, start-up and service instructions manual
Carrier 48LJ Installation, Start-Up And Service Instructions Manual
Single-package cooling units
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Table of Contents
Safety Considerations
Contents
Installation
Rigging and Unit Placement
Roof Curb
Field-Fabricated Ductwork
Rigging Label
Notice to Riggers
Physical Data
Outdoor-Air Inlet Adjustments
Condensate Drain
Unit Leveling Tolerances
Condensate Drain Piping Details
Base Unit Dimensions
Install Outdoor-Air Hoods
Enthalpy Sensor
Enthalpy Sensor Location
Economizer Hood Assembly Holes
Economizer Hood Installation
Field Wire Routing
Field Electrical Connections
Electrical Data
Control Wiring
Start-Up
Gas Piping
Installing Flue/Inlet Hoods
Unit Preparation
Unit Voltage
Leak Test and Dehydration
Evaporator Fan, Belt and Sheaves
Air Quantity Limits
Operating Sequences
Economizer Dampers and Potentiometer Settings
Service
Cleaning
Lubrication
Adjustments
Combustion Blower Removal
Belt Installation and Tensioning
Pulley Adjustment
Condenser Fan
Pilot Light off
Automatic Pilot Adjustment
Gas Valve Adjustment
Main Burner Adjustment
Protective Devices
Compressor Protection
Auxiliary Switch Adjustment
Auxiliary Switch Stroke Adjustment
Gas Heat
Charging Chart
Compressor Components
Relief Devices
Detailed Check
Electric Heat
Control Board Checkout
Compressor Lockout Connections
Economizer Board Continuity Check
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Safety Considerations
2
Contents
3
Roof Curb
4
Installation
5
Physical Data
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This manual is also suitable for:
50lj
48lj024
50lj024
48lw024
50lw024
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