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UNIT INFORMATIONUNIT INFORMATION
Service Literature
ELECTROSTATIC DISCHARGE (ESD)
Precautions and Procedures
CAUTION
Electrostatic discharge can aect
electronic components. Take precautions
to neutralize electrostatic charge by
touching your hand and tools to metal
prior to handling the control.
Table of Contents
Options . . . . . . . . . . . . . . . . . . . . . . . Page 2
High Altitude . . . . . . . . . . . . . . . . . . . Page 6
Blower Data . . . . . . . . . . . . . . . . . . . Page 7
Electrical Data . . . . . . . . . . . . . . . . Page 12
II Placement and Installation . . . . . Page 32
III Start Up Operation . . . . . . . . . . . Page 32
IV Charging . . . . . . . . . . . . . . . . . . . Page 33
V System Service Checks . . . . . . . Page 34
VI Maintenance . . . . . . . . . . . . . . . . Page 36
VII Accessories . . . . . . . . . . . . . . . . Page 38
VIII Diagrams . . . . . . . . . . . . . . . . . . Page 47
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cy gas packaged units equipped with variable speed di-
rect drive blowers, an inverter-driven variable speed com-
pressor, and a variable speed outdoor fan.
(19 to 31 kW) heating inputs. LGM048, 060 and 074 units
heating inputs. Gas heat sections are designed with alu-
minized (stainless optional) steel tube heat exchangers.
Cooling capacities range from 3 to 6 tons (7 to 21kW).
Information contained in this manual is intended for use
subject to change. Procedures outlined in this manual are
presented as a recommendation only and do not super-
sede or replace local or state codes.
If the unit must be lifted for service, rig unit by attaching
four cables to the holes located in the unit base rail (two
holes at each corner). Refer to the installation instructions
for the proper rigging technique.
CAUTION
As with any mechanical equipment, contact with
sharp sheet metal edges can result in personal
injury. Take care while handling this equipment and
wear gloves and protective clothing.
WARNING
Improper installation, adjustment, alteration,
service or maintenance can cause property damage,
personal injury or loss of life. Installation and service
must be performed by a licensed professional
HVAC installer or equivalent, service agency, or the
gas supplier.
WARNING
Electric shock hazard. Can cause injury
or death. Before attempting to perform
any service or maintenance, turn the
electrical power to unit OFF at disconnect
switch(es). Unit may have multiple power
supplies.
100038
02/2022
Ultra High Eciency LGM036U through 074U
LGM SERIES
3 to 6 ton
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