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Major component rough-in
Description
Single Zone unit was connected properly per local code and the product installation procedures.
All literature and bagged accessories have been removed from the fan discharge.
Indoor unit was installed, properly supported, and located indoors in a non-corrosive environment.
Single Zone unit's gravity condensate drain line was connected and routed where it properly drains away or, if installed in a
mechanical room, was connected and properly routed to a drain terminal.
Piping and insulation
Description
Copper
Over 5/8 inches—Rigid ACR only.
5/8 inches and under—Can use soft ACR.
15% silver brazing material only.
All refrigerant pipes and valves were insulated separately. Insulation butts up against the walls of the indoor units. No gaps or
cracks. Insulation was not compressed at clamps and hangers.
Brazing Practices
Description
Medical grade (there are 4 available) dry nitrogen for purging during brazing was used (constant 3 psi while brazing).
installation
(For more information on any procedure, refer to the detail provided in the installation section.)
refrigerant Piping
Description
All pipe materials were properly stored, capped, and clean. All burrs were removed after cutting and pipe ends were reamed
before brazing.
During refrigerant pipe installation, for each segment of pipe, a record was made of the pipe length (including expansion loops,
offsets, double-back sections), and sizes, as well as the quantity and type of elbows used.
All long runs of straight pipe were provided with expansion loops.
A torque wrench and backup wrench were used to tighten all flare connections.
The back side of all flares were lubricated with a small drop of PVE refrigeration oil before tightening flare fittings.
Ensure all field made flares are 45°. Use factory-supplied flare nuts only.
Pipe segments were properly supported and all wall penetrations were sleeved.
Pipe insulation was not compressed at any point.
No oil traps, solenoid valves, sight glasses, filter driers, or any other unauthorized refrigerant specialties were present.
Best practice including a minimum of 20" of straight pipe was installed between each elbow.
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inStallatiOn cHEckliSt
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
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