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Indoor unit installation
Return air requirements
Typical Closet Installations
Provisions shall be made to permit the air in the rooms and the living spaces to return to the air handler. Failure to comply may
cause a reduction in the amount of return air available to the blower, causing reduced air flow resulting in improper heating and
cooling of the living space. The reduced air flow may cause the air handler to cycle on the limit causing premature heating
element failure (if electric heat kits are installed).
Upflow Accessory Filter Box Kit
An accessory filter box kit can be used on the return air end of the air handler when configured in the upflow position.
The filter kit is placed over the return plenum in the floor and sealed to the plenum using sealant or caulking material
and/or tape. The air handler is placed on top of the return filter box and the return opening sealed to prevent leaks.
NOTE: Make sure the flow arrow on the air filter is pointing towards the coil.
Accessory Air Filter Box for 1" or 2" Air Filters. Filter Size Adjustment knob is on both sides.
FILTER BASE ASSEMBLY KIT MODEL NUMBERS – FIELD INSTALLED, PURCHASED SEPARATELY
VFB-1 – 16"X 20" X 2" Small Cabinet (12/18/24K)
VFB-2 – 20" X 20" X 2" Medium Cabinet (30/36K)
VFB-3 – 20" X 24" X 2" Large Cabinet (48/54/60/72K)
AM0**JNZDCH/AA IM ENG_V1.5_07082015
Closet Wall
9
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