Indoor Unit Installation Checklist - LG Multi V Installation Manual

Convertible surface mounted and ceiling suspended indoor units

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Service manual (147 pages)

Installation manual (113 pages)

Manual (104 pages)

Table Of Contents

Table of Contents

System ID No.: _________________________________________________ Indoor Unit ID.: ____________________________________

Checked by: __________________________________ Date:__________________ Signature: ___________________________________

Rough-In

Packing materials and literature removed.

Airflow direction correct.

Fan operates without obstruction.

Unit is properly supported – mounting bolts tight.

Unit is level (condensate pump installations).

Unit is tilted 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 IDU? Is a secondary drain line connected to the pan?

Refrigerant Piping

A dry nitrogen purge rate of 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 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).

Shut off valves have the same internal pipe diameter as the connected pipe (option).

Two shutoff valves installed; 1 high pressure liquid, 1 low pressure vapor (option).

Shutoff valves installed with Schrader port between the IDU and the ball of the valve (option).

Condensate System

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 inch per foot of pipe away from the IDU.

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 IDU bottom and high point of the line does not exceed 27-1/2".

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 angle than ±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

Additional housing, refrigerant and condensate pipe insulation has been installed to prevent sweating

while operating if IDU installed in abnormal environmental conditions. (Optional - job conditions 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.