Navien CH-180, Service Manual

Page: 124 / 155

© Navien Ameri c a I n c . 20 1 0 CH series servi c e Manua l Version 1 .0
8.2.4. Fan Motor(Combustion Air)
1. Turn off the gas supply
2. Turn off the 120V power supply
3. Turn off the water supply
4. Remove the four screws securing
the front panel. Remove front panel.
5. Loosen three fixing screws from the
fan assembly
8. Attach the fan to be replaced.
9. Fix the three screws of the fan.
10. Attach the harness housing to the
fan assembly
11. Install front panel using 4(four)
screws.
12. Turn on water supply, power
supply, and gas supply.
7. Pull out the fan assembly.
6. Disconnect the harness housing at
the fan assembly.
1 22
Figure 7
Figure 8
Figure 9
NOTE
1. Don’t over tight screws with high
torque drill. It will damage to fan
housing.
2. Confirm whether the screws tighten
enough or not.
3. Confirm whether there are unnec
essary noises after reinstalled fan.