Navien CH-180 Service manual - page 130

©Navien America Inc. 2010

CH  series service Manual

Version 1.0

8.2.8. Manifold

9. Remove the main gas valve screws 

    from the gas adapter. 

15. Replace the PCB. (refer to 8.2.1 

      PCB)

16. Install front panel using 4(four) 

      screws.

17. Turn on water supply, power 

      supply, and gas supply.

18. Perform the measuring of gas pres

      sure setting procedure.

19. Check for gas leaks.

14. Replace the gas pipe. Replace the 

      Oring where the assembly attaches 

      to the gas connection. Make sure 

      the old Oring removed and 

      discarded.

NOTE

1. Always replace with new gasket.

2. Wiring should be in right position.

3. Always use right part(Oring) and 

    right size and place to pipe

10. Pull out the main gas valve.

11. Positioned main gas valve.

12. Attach the main gas valve and 

     secured with screws.

13. Assemble the air pressure feedback 

     tube, gas pressure sensor tube and 

     wire harness connector.

128

Figure 24

Figure 25

Figure 20

Failure to correctly assemble 

the components according to 

these instructions may result in 

a gas leak or explosion.

WARNING