4WAY VALVE
AIR RETURN GRILL INSTALLATION (ACRG15)
INSTALLATION REQUIREMENTS
(ROOF THICKNESS MUST BE AT LEAST 2.5")
The Air Return Grill is designed for application in systems that utilize field fabricated (OEM
supplied)air ducting. The ducting must be routed through the ceiling cavity (between the
interior ceiling and roof). Ducting specifications are given in the section labeled Supply
Ducting and Registers.
1. The ACRG must be installed under the roof opening. The ACRG bolts to the
underside of the roof unit. Compression of the framed ceiling cavity between the roof
unit and the ACRG is what holds both components in place.
2. Ceiling cavity depth (the measurement from the ceiling to the roof): 5.5" - Maximum,
2.5" - Minimum
3. The 115 VAC service for the air conditioner / heat pump must be routed into the ACRG
(refer to Fig.5 A & B below). 12VDC should be routed to the digital control box. If a LP
furnace is being used, a control wire must be connected from the furnace to the digital
control box for proper operation.
FIGURE 5A WIRING DIAGRAM FOR HEAT PUMP
RED/ WHT
COM
12VAB
GRN
PURP LE
BLU
COM
12VAB
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