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INSTALLATION CHECKLIST
When connecting with DOAS system, ensure that all information in DOAS Installation Manual is read by installers and
that the system is configured as applicable per the DOAS Installation Manual.
CAUTION
•
⊘
Do not use the following functions of MV5 which could interrupt proper Target Pressure control for DOAS
- FN14, FN30, FN8, SE14
* FN27 would not be activated base on the DOAS Fan control setting in ODU defrost mode
•
⊘
Do not run unit during construction phase. Damage to internal components may result and void warranty
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.
Minimum external static pressure requirements met.
Ductwork is properly sized considering the available external static pressure rating of the 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.
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).
Three shutoff valves were installed; one (1) high pressure liquid, one (1) high pressure vapor,
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 .
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 (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
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