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Installation Manual – THH
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RETURN AIR LOCATION
This unit is equipped with a field reversible rear or bottom ducted air
return for plenum style units. To change the return air location, remove the
reversible plenum box panel and the filter rack. Rotate both the reversible
panel and filter rack 180 degrees. Replace the reversible panel in the old
filter rack position and fasten using the supplied screws. Fasten the filter
rack to the location where the reversible panel was and replace the filter(s)
as described above.
Section 1 - Receipt & Initial Installation
FAN REMOVAL
This fan assembly is easily removable by unscrewing the (4) E-20 nuts from
the fan deck and sliding the fan assembly off of the weld studs. Disconnect
motor wiring. Reassemble fans and torque nuts to 30 in/lbs.
PLENUM BOX SERVICE PANEL
The service panel on the plenum box is easily removable by removing the
screws located on the sides and bottom of the service panel.
PLENUM BOX REMOVAL
In most cases this unit is fully serviceable without the need for removal of
the plenum box. However should the need arise, the plenum box is easily
removable by removing the screws attaching the plenum box to the sides,
top and rear of the coil casing.
