Gps - Navien NP-180 Service Manual

8.2.10. GPS

1. Turn off the gas supply
2. Turn off the 120V power supply
3. Turn off the water supply
4. Loosen the PCB right-side screw from
bottom base
5. Remove the gas pressure sensor connecting
housing into the PCB.
< Figure 26 >
6. Pull out the PCB. (refer to 8.2.1 PCB)
7. Loosen the gas pressure sensor lower-side
2 screws from base.
< Figure 27 >
©Navien America Inc. 2010
8. Remove the gas pressure sensor 2 tubes
into the gas pressure sensor.
9. Replace with new gas pressure sensor.
10. Assemble the gas pressure sensor 2 tubes.
11. Attach the gas pressure sensor and
secured with 2 screws.
12. Replace the PCB. (refer to 8.2.1 PCB)
13. Install front panel using 4(four) screws.
14. Turn on water supply, power supply, and
gas supply.
NOTE
Always use right type of tube and right place.
147
NR/NP series service Manual
< Figure 28 >
Version 2.0