Installation Checklist - LG MULTI V ARNU073TUD4 Installation Manual
Ceiling cassette indoor unit
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- Engineering manual (136 pages) ,
- Installation manual (75 pages) ,
- Engineering manual (108 pages)
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INSTALLATION CHECKLIST
System ID No.: _________________________________________________ Indoor Unit ID.: ____________________________________
Checked by: __________________________________ Date:__________________ Signature: ___________________________________
Rough-In
Description
All literature and bagged accessories have been removed from the 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).
Required 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?
Duct Work
Description
All seams sealed – no air leaks.
Duct work is properly sized considering the available external static pressure rating of the indoor unit fan.
No kinks present in the flexible duct work. Duct work is properly supported.
Duct work balancing dampers have been installed and are correctly adjusted or open.
Grilles and registers are properly sized and installed.
Refrigerant Piping
Description
A medical grade dry nitrogen purge rate of 3 psig was maintained during all brazing activity.
The back side of all flares were lubricated with a small drop of PVE refrigeration oil before tightening flare fittings (POE type was
NOT used).
All field made flares are 45°. Use factory-supplied flare nuts only.
A torque wrench and backup wrench were used to tighten all flare connections.
Refrigerant pipe is properly SUPPORTED to keep lateral pressure off unit connections.
(Optional) High quality R-410A rated full port ball valves (Schrader between the valve body and the indoor units) used at all
indoor units and at will in the refrigerant piping network.
(Optional) Shutoff valves have the same internal pipe diameter as the connected pipe.
(Optional) Two shutoff valves were installed; one (1) high pressure liquid, one (1) low pressure vapor.
Condensate Pump / Drain Installation
Description
Condensate pipe is properly sized, supported to keep lateral pressure off connections, and insulated using LG recommendations.
Condensate pipe horizontal segments are sloped a minimum of 1/50 to 1/100 slope away from the indoor unit.
Indoor units with condensate pumps were level. Pumped condensate drain lines were properly connected (
traps, and connect to the top surface of the main drain line).
(Optional) Field-provided condensate line check valve was installed in the condensate pipe riser.
All condensate vertical risers are equal to or less than 27-1/2 inches to 31-1/2 inches from the bottom of the indoor unit (de-
pends on model).
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
Description
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 refrigerant pipes and valves were insulated separately. Insulation is positioned up against the walls of the indoor units. All
insulation seams and joints are airtight with no gaps shown. Insulation is not compressed at any point. Double layer insulation is
provided at pipe supports and wall penetrations.
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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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