Dayton 3VG80 - Manual (Page 8)

Dayton Operating Instructions and Parts Manual 3VG80
8
Dayton Propane
Construction Heater ®
Maintenance (Continued)
Ground Screw
Terminal
Board
Motor
Green
Lead
Transformer
Green Lead
Power Cord
Green Lead
Figure 6 - Location of Ground Screw
Hole in Shell
for Wires
Motor
Mount
Screw
Fan Guard
Motor Mount
Figure 7- Removing Motor, Motor Mount,
and Fan Guard from Heater
6. 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
damage fan pitch.
7. Use hex wrench to loosen setscrew
which holds fan to motor shaft.
8. Remove fan. Be careful not to damage
the fan blade pitch.
9. Use nut driver to remove two nuts that
attach motor to motor mount.
10. Discard old motor.
11. Attach motor to motor mount with
two nuts. Tighten nuts firmly.
12. Replace fan on motor shaft. Make sure
setscrew contacts flat surface on motor
shaft.
13. Tighten setscrew firmly (40-50 inch-
pounds).
14. Carefully route motor wires through
hole in shell (See Figure 8). Place
motor, motor mount, and fan guard
into rear of heater shell.
15. Insert screws through heater shell and
into motor mount. Tighten screws
firmly.
16. Turn heater on its side to access
opening in bottom of base. Connect
green wires from motor, transformer,
and power cord to heater shell using
ground nut (See Figure 5, page 10).
17. Attach black and white wires to
terminal board (See Wiring Diagram,
page 14, for correct locations).
18. Replace base tray.
Figure 8 - Replacing Motor, Motor Mount,
and Fan Guard into Heater
Hole in Shell
for Wires
FAN
1. Remove motor, motor mount, and fan
(See Motor, pages 7 and 8, steps 1
through 8) .
2. Clean fan using soft cloth moistened
with kerosene or solvent.
3. Dry fan thoroughly.
4. Replace fan on motor shaft. Make sure
setscrew is touching back of flat
surface on motor shaft (See Figure 9).
Motor shaft
Fan
Setscrew
Figure 9 - Fan, Motor Shaft, and Setscrew
Location