8. Use hex wrench to loosen set screw which
holds fan to motor shaft (see Figure 7).
Remove fan. Be careful not to damage
the fan blade pitch.
9. Use a nut driver to remove two nuts that
attach motor to motor mounting bracket.
10. Disconnect the green power cord wire
from motor and remove black and white
wire terminals.
11. Discard old motor.
12. Attach green power cord wire to new motor.
13. Replace black and white terminals.
14. Attach new motor to motor mounting
bracket with 2 nuts. Tighten nuts firmly.
15. Place fan onto motor shaft of new mo-
tor. Make sure set screw contacts flat
Hole in Bracket
Motor
Motor Mounting Bracket
Figure 6 - Removing Fan and Motor
Clean fan every 500 hours of operation or
as needed.
1. Remove screws on top cover using a
Phillips head screw driver.
2. Remove top cover.
3. Detach the 2 black motor wires from ter-
minal block under top cover. Be sure to
detach only wires coming from motor.
160495-02A
SERVICE PROCEDURES
FAN
www.usaprocom.com
surface on motor shaft. Tighten set screw
firmly (40-50 inch-pounds [46.08-57.60
kilogram-centimeters]).
16. Place motor and fan guard into rear of
heater shell. Make sure power cord is
properly located.
17. Line up mounting holes in shell with
holes on motor mount. Replace 4 screws
through shell and motor mount.
18. Route motor wires through hole in top of
shell (see Figure 6).
19. Reconnect motor and fan wires to the
same posts on terminal block as removed
in step 3, page 8 (see Figure 6).
20. Replace top cover.
21. Replace fan guard.
Top
Cover
Terminal
Block
4. Remove fan guard from rear of heater.
Fan guard will snap out of shell.
5. Reach into rear of heater shell. Carefully
pull motor wires through hole in bracket.
Note: Pull wires through hole one at a time.
6. Remove screws holding motor mount to
shell. Use 5/16" nut driver or Phillips head
screw driver.
Setscrew
Figure 7 - Setscrew
Location
9