Berner IDC12 Series Installation & Maintenance Instructions Manual page 7

A. BLOWER MODULE REMOVAL
1. Disconnect and lockout power from the unit.
2. Remove the Bottom Access Panel. The Inlet Screen and
Top Access Panel do not need to be removed, but taking
them off can make the process easier.
3. Disconnect the wire harness from the motor(s). If the
unit has electric heat, label and remove power wires and
thermal cutout circuit wires from the heater assemblies.
See Figure 14.
4. Removing the blower module requires removing (4) #12
self-drilling sheet metal screws. Using a 5/16" hex driver,
first remove the (2) screws that go through the
Transverse into the Motor Mount. See Figure 12.
FIGURE 12 - Location of screws
5. After removing the (2) screws in this step, the approxi-
mately 40 lbs. module will be free to drop down out of
the unit. While holding the module in place by
pushing up onto the motor, remove the top, final (2)
screws that go through the Blower Plate into the Main
Channel. See Figure 12.
6. Gripping the motor and motor mount, slowly rotate the
top of the module forward and then down and out of
FIGURE 13 - Removing the Blower Module
the unit. See Figure 13.
7. To remove the motor, first loosen the set screws in the
fan impeller hubs using a 5/32" Allen wrench. The set
screw can be accessed up through the fan discharge or
through the small hole on the back of the blower
housing.
8. Next, remove the blower housings by removing the (4)
self-drilling screws from the back of the fan housing.
The fan housing and fan impellers may now be slid off
of the motor shaft.
9. To remove the Motor, remove the motor clips from the
motors, and disconnect the motor ground wire from the
Motor Mount.
10. Reinstall in reverse order.
B. REPLACEMENT OF ELECTRIC HEATER ELEMENT
1. The blower module does not need to be removed
to clean or replace electric heater assemblies.
2. See Figure 14. There are (4) heater assemblies per
Blower Module. All have (2) power connections. The
"Half" heater assemblies also have (2) connections for the
thermal cutout circuit. Label and remove all wires on the
heaters to be replaced.
3. The (2) "Full" heaters are each held in place by (3) self-
drilling screws that go through the heater mounting
bracket into the fan housing. The (2) "Half" heaters are
each held in place by (2) self-tapping screws that go
through the heater frame into the mounting bracket that
is attached to the fan housing. Remove all fasteners on
the heaters to be replaced.
4. Reinstall new heaters in reverse order.
NOTE: New heaters temporarily emit the smell of burnt oil
when they are energized for the first time.
This is normal and will only occur for the first
few minutes of operation.
FIGURE 14 - Location of screws
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