INSTALLATION CHECKLIST
System ID No.: _________________________________________________ Indoor Unit ID.: ____________________________________
Checked by: __________________________________ Date:__________________ Signature: ___________________________________
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4-W
ay Cassette Indoor Unit
76
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Rough-In
N/A Not Complete Complete
Packing materials and literature removed from fan discharge.
Airflow direction correct.
Fan wheels spin without obstruction.
Unit is properly supported – mounting bolts tight.
Unit is level (condensate pump installations).
Unit is canted toward gravity drain pan nipple (gravity drain installations only).
Recommended minimum service clearances followed.
Air filter is clean and properly installed.
Does local code require a secondary drain pan under the indoor unit? Is a secondary drain line connected
to the pan?
Ductwork
N/A Not Complete Complete
All seams sealed – no air leaks.
High-static models only – minimum external static pressure requirements met.
Ductwork is properly sized considering the available external static pressure rating of the indoor unit fan.
No kinks present in the flexible ductwork. Ductwork is properly supported.
Ductwork balancing dampers have been installed and are correctly adjusted or open.
Grilles and registers are properly sized and installed.
Refrigerant Piping
N/A Not Complete Complete
A dry nitrogen purge rate of three (3) psig was maintained during all brazing activity.
PVE refrigerant oil was used as a lubricant on flare fittings (POE type was NOT used).
Field formed pipe flares are 45°.
Flare fittings were properly tightened.
Refrigerant pipe is properly supported to keep lateral pressure off unit connections.
Refrigerant shutoff valves are full port design with integral Schrader port rated for R410A (option).
Shutoff valves have the same internal pipe diameter as the connected pipe (option).
Two shutoff valves were installed; one (1) high pressure liquid, one (1) low pressure vapor (option).
Shutoff valves installed with Schrader port between the indoor unit and the ball of the valve (option).
Condensate System
N/A Not Complete Complete
Condensate pipe is properly sized and supported to keep lateral pressure off unit connections.
Condensate pipe horizontal segments are sloped a minimum of 1/4"/100' of pipe away from the indoor unit.
Condensate pipe and drain traps were sized using LG recommendations.
Field-provided condensate line check valve was installed in the condensate pipe riser (option).
Condensate traps were installed on gravity drain pipes (High-Static models only).
Condensate line vertical rise between indoor unit bottom and high point of the line does not exceed 27-1/2".
Condensate pump power has been disconnected (High-Static indoor unit gravity-drain installations only).
Condensate pump riser intersects the building main drain using an inverted trap with connection to the top half
of the drain line with no more of a ±45° of vertical.
If required by local code, is a secondary high level condensate shutoff switch present/wired properly (factory
provided internal high level float switch will shut down cooling operation if high water level in the pan is detected)?
Insulation
N/A Not Complete Complete
Additional housing, refrigerant and condensate pipe insulation has been supplemented to prevent sweating
while operating if indoor unit installed in abnormal environmental conditions. (Optional - job condition specific.)
All pipes are independently insulated. All insulation seams and joints are airtight. Insulation is not compressed.
Double layer insulation is provided at pipe supports and wall penetrations.
