Desa TB111 - Manual (Page 8)

www.desatech.com 119143-01A 8
Figure 8 - Fan and Motor Reversed for
Cleaning
Fan
Terminal
Block
Figure 7 - Removing Fan and Motor
Top Cover
SERVICE PROCEDURES
warninG: never service
heater while it is plugged in,
connected to propane supply,
operating or hot. Severe burns
and electrical shock can occur.
CleaninG Fan
Clean fan every 500 hours of operation or
as needed.
1. Remove screws on top cover using 5/16"
nut-driver or Phillips head screw driver.
. Remove top cover.
3. Detach the black motor wires from ter-
minal block under top cover. Be sure to
detach only wires coming from motor.
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.
7. Carefully pull motor and fan out of shell.
IMPORTANT: Be careful not to damage
fan. Do not set motor and fan down with
the weight resting on fan. This could dam-
age fan pitch.
8. Turn motor and fan around. Place motor
and fan into shell backwards. Note: Motor
will go into shell first (see Figure 8).
9. Line up rear mounting holes in shell with
first hole on each side of motor mount (see
Figure 8). Note: When holes are lined up,
fan should be outside of shell.
10. Holding mounting screws, carefully reach
through fan blades into rear of heater. Be
careful not to damage fan pitch. Insert
screw through motor mount and shell.
With free hand, attach screw finger tight.
Repeat process for other mounting hole.
11. Use 1/8" hex wrench to loosen setscrew
which holds fan to motor shaft (see Fig-
ure 9, page 9).
1. Slip fan off motor shaft.
13. Clean fan using soft cloth moistened with
a cleaning solvent.
Motor
Motor Mounting
Bracket
Motor Mounting
Bracket
Hole in
Bracket