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SERVICE
PROCEDURES
Upper Shell Removal
1. Remove screws along each
side of heater using 5/16"
nut-driver. These screws
attach upper and lower
shells together.
2. Lift upper shell off.
3. Remove fan guard.
Fan
IMPORTANT: Remove fan
from motor shaft before
removing motor from heater.
The weight of the motor
resting on the fan could
damage the fan pitch.
1. Remove upper shell (see
above).
2. Use 1/8" Allen wrench to
loosen setscrew which
holds fan to motor shaft.
3. Slip fan off motor shaft.
4. Clean fan using a soft cloth
moistened with kerosene or
solvent.
5. Dry fan thoroughly.
6. Replace fan on motor
shaft. Place fan hub flush
with end of motor shaft
(see Figure 8).
7. Place setscrew on flat of
shaft. Tighten setscrew
firmly (40-50 inch-pounds/
4.5-5.6 n-m).
8. Replace fan guard and
upper shell.
10
Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
Figure 6 - Upper Shell Removal
125 SHELL REMOVAL
Setscrew
Figure 7 - Fan, Motor Shaft, and Setscrew Location
Motor
Shaft
Figure 8 - Fan Cross Section
!
WARNING
Upper
Shell
PFA/P 050
Motor
Shaft
Fan
Flush
Setscrew
Fan Guard
Fan
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