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Lennox KGB048 - User Manual

Lennox KGB048
56 pages
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©2015
Litho U.S.A.
WARNING
Improper installation, adjustment, alteration, ser
vice or maintenance can cause property damage,
personal injury or loss of life. Installation and ser
vice must be performed by a licensed professional
HVAC installer or equivalent, service agency, or the
gas supplier
Table Of Contents
Dimensions Page 2.................................
Parts Arrangements Page 3.........................
Shipping and Packing List Page 4....................
General Page 4....................................
Requirements Page 4...............................
Unit Support Page 5................................
Duct Connection Page 5............................
Rigging Unit For Lifting Page 6.......................
Horizontal Air Discharge Page 6......................
Condensate Drains Page 6..........................
Gas Piping Page 8.................................
Pressure Test Gas Piping Page 9.....................
High Altitude Derate Page 9.........................
Electrical Connections Page 9.......................
Blower Operation and Adjustments Page 11............
Cooling Start-Up Page 42............................
Gas Heat Start-Up Page 51...........................
Heating Operation and Adjustments Page 52............
Electric Heat Start-Up Page 52........................
Service Page 53....................................
INSTALLATION
INSTRUCTIONS
KGB/KCB024
KGB/KCB030
KGA/KCA036
KGB/KCB036
KGA/KCA048
KGB/KCB048
KGA/KCA060
KGB/KCB060
KGA/KCA072
KGB/KCB072
KGB/KCB074
KGA/KCA090
2-Ton
2-1/2-Ton
3-Ton
3-Ton
4-Ton
4-Ton
5-Ton
5-Ton
6-Ton
6-Ton
6-Ton
6-Ton
7-1/2 Ton
GAS AND COOLING PACKAGED UNITS
507348-04
12/2015
Supersedes 507348-01, -02, -03
RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE
KG SHOWN

Table of Contents

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Lennox KGB048 Specifications

General IconGeneral
Refrigerant TypeR-410A
Voltage208/230V
Phase1
Tonnage4 tons
Cooling Capacity48000 BTU/h

Summary

Installation Instructions

Unit Dimensions

Unit Parts Arrangement

Unit Support and Mounting

Rigging Unit for Lifting

Gas Piping Connection

Connecting Gas Piping

Guidelines and requirements for connecting the gas supply piping.

Pressure Test Gas Piping

Electrical Connections

Power Supply Connection

Instructions for connecting the unit's power supply.

Control Wiring

Blower Operation and Adjustments

Blower Operation Basics

How the blower operates based on thermostat settings.

Determining CFM (Direct Drive)

Procedure to determine airflow volume for direct drive blowers.

Determining CFM (Belt Drive)

Blower Belt Adjustment

Belt Adjustment (3 HP Units with Tensioner)

Check Belt Tension (No Tensioner)

Field-Furnished Blower Drives

Cooling Start-Up Procedure

Cooling Operation

Steps to initiate cooling demand and operation.

Compressor Voltage Phasing

Procedure to ensure correct compressor and blower rotation.

Refrigerant Charge (Fin;Tube Coil)

Refrigerant Charge (All-Aluminum Coil)

Operating Pressures (KGA;KCA 060 S)

Charge Verification (Approach Method)

Refrigerant Charge (All-Aluminum Coil - Procedure)

Operating Pressures (KGB;KCB024)

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