Trane Power Exhaust Foundation BAYPWRX320, Installation Instructions Manual

Page: 11 / 16

ACC-SVN199E-EN 11
Wiring Connection
Power Wiring
1. Open and lock unit disconnect.
2. Remove the top cover, access panel and control box
access panel from the unit.
3. Route the power harness.
a. Standard Economizer: Route power harness 1M
and 3M through wire ties in the indoor section all
the way to the control box, and connect them to
HTB as shown in
Figure 17 and Figure 18 .
b. Low Leak Economizer:
i. Take the low leak economizer labelled harness
out of the box and route the harness as shown in
Figure 19 from the control box to the return
section of the economizer.
ii. Connect the power harness 1M and 3M to HTB in
the control box (see Figure 19 ) and route
through the control box and indoor section wire
ties and along the side of economizer and pass
through the bushing as shown in
Figure 19 and
Figure 20 .
4. Take the back panel off from the power exhaust,
remove the 4 wire harness connected and discard.
5. Connect the supplied harness to respective exhaust
fan relay (XFR) and capacitor exhaust fan (CFX) as
shown
Figure 21 .
WARNING
Hazardous Voltage w/Capacitors!
Failure to disconnect power and discharge capacitors
before servicing could result in death or serious injury.
Disconnect all electric power, including remote
disconnects and discharge all motor start/run
capacitors before servicing. Follow proper lockout/
tagout procedures to ensure the power cannot be
inadvertently energized. Verify with a CAT III or IV
voltmeter rated per NFPA 70E that all capacitors have
discharged.
Figure 17. Power wiring for standard economizer
Figure 18. Connect power wiring to HTB
Route Power
Exhaust Harness
Route Power
Exhaust Harness
3M (BK) 1M (R)
Figure 19. Power wiring for low leak economizer
Figure 20. Power wiring through low leak economizer
Route Power
Exhaust Harness
Bushing
Wire Ties