Master BV125EDI, Owner'S Manual

Page: 10 / 20

10
SERVICE
PROCEDURES
WARNING !
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.
125 SHELL REMOVAL PFA/P 050
Upper
Shell
Fan Guard
Figure 6 - Upper Shell Removal
Never service heater while it is plugged in, operating, or
hot. Severe burns and electrical shock can occur.
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.
Setscrew
Fan
Motor
Shaft
Figure 7 - Fan, Motor Shaft, and Setscrew Location
Setscrew
Motor
Shaft
Fan
Flush
Figure 8 - Fan Cross Section