4
Fig. 4 — Power Exhaust Wiring Diagram
Power Exhaust Installation for Vertical Return
Air Application
On vertical return air duct applications the power exhaust fan as
-
sembly is attached at the unit return air panel location.
1. Remove existing return air panel on unit, located below the
economizer hood as shown in Fig. 5. Discard the panel and
screws.
2. Install support bracket (50HE400966) to holes in the base
rail, as shown in Fig. 6, using four No. 10 x 5/8 in. serrated
head screws (AL48AM217).
Fig. 5 — Unit Return Air Panel Removal for Vertical
Return Air Applications
3. Install three No. 10 x 5/8 in. serrated head screws
(AL48AM217) in the three locations shown in Fig. 7. The
screws should be installed very loose.
4. Place power exhaust fan assembly on lower flange of power
exhaust opening as shown in Fig. 8. Make sure that all three
screws line up in the slots in the power exhaust bottom
flange.
Fig. 6 — Install Support Bracket to Base Rail for
Vertical Return Air Applications
LEGEND
OFC
– Outdoor Fan Connector
PEM
– Power Exhaust Motor
PER
– Power Exhaust Relay
PLx-y
– Plug x–Pin y
CAP
– Capacitor
Return Air Panel
Support Bracket
