Flame Rod - Navien NCB-180 Service Manual

8. Remove the four screws from the bottom of the fan
assembly.
Figure 6
9. Detach the fan motor from the assembly and replace it
with the new part.
10. Replace the 4 screws used to attach the fan motor to the
assembly.
11. Reinstall the fan assembly to the bracket by using the
mounting screw.
12. Attach the gas valve connection back to the fan
assembly by using the 4 screws as shown in Figure 5.
13. Reconnect the wiring connector from the fan assembly.
14. Turn on water supply, power supply, and gas supply to
the unit.
NOTE
Do not over-tighten the screws for the fan motor
replacement with high torque drill. This may cause
damage to the part(s).

6.2.4 Flame Rod

1. Turn off the gas supply to the unit.
2. Disconnect the unit from the power supply.
3. Turn off the water supply to the unit.
4. Remove the Ignition Transformer insulated cables.
5. Remove the 2 screws from the flame rod as shown in
Figure 7 below.
Figure 7
6. Remove the flame rod wiring connector.
Figure 8
7. Remove the flame rod from the burner assembly and
replace with the new part.
8. Reconnect the 2 ignition transformer insulated cables to
the new flame rod.
9. Place the new flame rod back onto the burner assembly
and secure it by using the 2 screws from Figure 7.
10. Turn on water supply, power supply, and gas supply to
the unit.