©2019
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 5....................
General Page 5....................................
Requirements Page 5...............................
Unit Support Page 6................................
Duct Connection Page 6............................
Rigging Unit For Lifting Page 7.......................
Horizontal Air Discharge Page 7......................
Condensate Drains Page 7..........................
Gas Piping Page 9.................................
Pressure Test Gas Piping Page 10.....................
INSTALLATION
INSTRUCTIONS
LGH/LCH036, 048,
060, 072 & 074
3, 4, 5 and 6 Ton
GAS AND COOLING PACKAGED UNITS
507410-05
4/2019
Supersedes 10/2018
High Altitude Derate Page 10.........................
Electrical Connections Page 11.......................
Blower Operation and Adjustments Page 13............
Cooling Start-Up Page 46............................
Cooling Operation Page 57...........................
Gas Heat Start-Up Page 60...........................
Heating Operation and Adjustments Page 61............
Electric Heat Start-Up Page 62........................
Advanced Air Flow Control Start-Up Page 62............
Hot Gas Reheat Startup Page 65......................
Service Page 67....................................
Factory Unit Controller Settings Page 70...............
CAUTION
As with any mechanical equipment, contact with
sharp sheet metal edges can result in personal in
jury. Take care while handling this equipment and
wear gloves and protective clothing.
RETAIN THESE INSTRUCTIONS FOR FUTURE REFERENCE
LG STANDARD AND HIGH EFFICIENCY SHOWN
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