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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 bolt,
carefully reach through
fan blades into rear of
heater. Be careful not to
damage fan pitch. Insert
bolt through motor mount
and shell. With free hand,
attach nut finger tight.
Repeat process for other
mounting hole.
11. Use 3,1 mm (1/8") hex
wrench to loosen setscrew
which holds fan to motor
shaft (see Figure 9).
12. Slip fan off motor shaft.
13. Clean fan using soft cloth
moistened with kerosene
or solvent.
14. Dry fan thoroughly.
15. Replace fan on motor
shaft. Make sure setscrew
is touching back of flat
surface on motor shaft (see
Figure 10).
16. Place setscrew on flat of
shaft. Tighten setscrew
firmly (4,52-5,65 [40-50
inch-pounds]).
17. Remove two nuts and
bolts securing motor
mount to shell.
18. Pull motor and fan from
shell. Turn motor and fan
around. Carefully place
back in shell.
Note:
Fan
will go into shell first.
19. Line up mounting holes in
shell with holes on motor
mount. Replace four bolts
through shell and motor
mount. Insert bolts from
outside of heater. Tighten
nuts firmly.
20. Route motor wires through
hole in bottom of shell
(see Figure 7, page 10).
Fan
Motor shaft
Figure 9 - Fan, Motor Shaft, and Setscrew Locations
Setscrews
Hub
Figure 10 - Fan Cross Section
Figure 8 - Fan and Motor Turned Around
First
Hole
Continued
Fan
Motor Shaft
Setscrews
Rear Mounting
Hole