LG AR-DR22-17A Commercial Rooftop Monthly Yearly

Removing from Storage

As units are removed from storage to be installed in their final location, they should be protected and maintained in a similar fashion until the equipment goes into operation.

Prior to installing the unit and system components, inspect the unit assembly to make sure it is in working order.

Check

WARNING!

Note!

Cooling Options

Units have the following cooling options available:

Units with packaged DX are shipped fully charged with refrigerant and are ready for operation upon arrival.

Heating Options

There are three different optional heat sources that can be ordered for this unit:

Airflow Arrangement

Safety Listing

Blower

Coils

Compressors

Dampers

Optional Barometric Relief Damper

Electric Heater

Filters

Indirect Gas-Fired Furnace

Packaged DX System

Vestibule

Handling Concerns for Units with Packaged DX

WARNING! Units having packaged DX have a system that is pressurized with refrigerant and if it is damaged, the refrigerant could leak into the atmosphere or cause bodily harm due to the extreme cold nature of expanding refrigerant. Use protective equipmen

Before Lifting - Vestibule

Before Lifting - Field Power Access

Lifting

Figure 5: DOAS Unit: Spreader Bar.

NOTE: Spreader bars are required to prevent damage to the cabinet. Failure to follow proper instructions could result in property damage.

Roof Curb Mounting

Factory-Supplied Roof Curbs

Install Curb

Install Ductwork

Set the Unit

Install Vestibule

Optional Piping Vestibule

Ductwork Configurations

NOTE: Downblast Discharge Ductwork - whenever downblast discharge is used, the ductwork directly beneath the unit must be connected with either a “T” or an “L” configuration and the area directly beneath the heat source must not have any openings such as

Figure 6: Typical Unit with Condensing Section and Factory Supplied Curb Kit.

Figure 7: Typical Unit with Piping Vestibule and Factory Supplied Curb Kit.

Rail Mounting and Layout

Recommended Electrical and Gas Supply Entry Locations

Figure 10: Recommended Gas and Electric Supply Entry Locations

Alternate Supply Entry Locations

WARNING! Never drill holes in the roof of the unit! There is high voltage wiring located between the inner and outer roof panels. Damage to the wiring could cause severe bodily harm or death.

Figure 9: Typical Unit Installed on Field Supplied Rails

WARNING! Improper installation, adjustment, service, maintenance, or alteration can cause personal injury, or loss of life. Installation, startup, and service must be performed by a qualified installer, service agency, or gas supplier.

NOTE: Improper installation, adjustment, service, maintenance, or alteration can cause property damage. Installation, startup, and service must be performed by a qualified installer, service agency, or gas supplier.

Outdoor Air Intake Hood

Each VPR, VPRC/P, VPRE, and VPRX series ventilator comes with a factory-supplied outdoor air intake hood that must be assembled prior to startup. The outdoor air intake hood is available in two options:

The individual parts of the intake hood are located between the outdoor air intake damper and the intake hood top piece (item #6 for models 110/210/310; items #7 and #8 for models 350/352), which is secured flush with the end of the unit during shipment.

Tools Needed