Allied A96UH1E - Return Air Guidelines; Figure 14. Side Return Air (with Transition and Filter); Figure 15. Optional Return Air Base (Upflow Applications Only)

508297-01 Page 11 of 57Issue 2219
Return Air Guidelines
Return air can be brought in through the bottom or either
side of the furnace installed in an upow application. If the
furnace is installed on a platform with bottom return, make
an airtight seal between the bottom of the furnace and the
platform to ensure that the furnace operates properly and
safely. The furnace is equipped with a removable bottom
panel to facilitate installation.
Markings are provided on both sides of the furnace cabinet
for installations that require side return air. Cut the furnace
cabinet at the maximum dimensions shown on Page 2.
Furnace applications which include side return air and a
condensate trap installed on the same side of the cabinet
(trap can be installed remotely within 5 ft.) require either a
return air base or eld-fabricated transition to accommodate
an optional IAQ accessory taller than 14.5”. See Figure 14.
Figure 14. Side Return Air
(with Transition and Filter)
Return
Air
Plenum
Tr ansition
20” X 25” X 1”
(508mmX 635mm X 25mm)
Air Filter
1-1/2 in.
Figure 15. Optional Return Air Base
(Upow Applications Only)