LG AR-DR22-17A Commercial Rooftop Monthly Yearly
The LG AR-DR22-17A Commercial Rooftop Monthly Yearly eansures that you easily identify components that should be repaired or replaced. Prior to installing the unit and system components, inspect the unit assembly to make sure it is in working order.
MaintainX
04/26/2021
LG AR-DR22-17A Commercial Rooftop Monthly Yearly
The LG AR-DR22-17A Commercial Rooftop Monthly Yearly eansures that you easily identify components that should be repaired or replaced. Prior to installing the unit and system components, inspect the unit assembly to make sure it is in working order.
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
Source: LG