Johnson Controls DHR18CSB21S, Service Manual

Page: 79 / 93

Service Manual
70
3. Remove the screws on
fan sub-assembly.
Remove the screws on fan sub-assembly.
4.
Removing the fan cage
enclosure
Rotate the
fan cage housing toward
supply opening and remove.
5. Loosen the fan and
motor.
Use
a hex wrench
to loosen the screws
holding the fan cage to the motor shaft.
Remove outer housing holding motor in
place.
6. Replace the motor
Remove the motor from the support
bracket. Then remove the fan cages from
the motor shafts.
Remove the motor from
the air inlet and replace with new motor.
If
the new motor comes with a mounting
bracket, attach the bracket to the housing
after sliding on the fan cages. Be sure to
tighten the cages onto the motor shafts.
7.
Reassembly of the unit Reassemble the unit in the reverse order
of disassembly and test operation.
Disassembly of filter screen for return air
Important: Make sure that the power supply to the system is turned off before disassembling and protect all the
parts during disassembly. Do not put filter screen near a high temperature heat source.
Step Illustration Handling Instruction
Disassembly of filter
screen for return air
Gently push down on the filters in the slots
and pull/slide out slowly to prevent damage.