Navien CH-180, Service Manual, Page: 138 / 155

© Navien Ameri c a I n c . 20 1 0 CH series servi c e Manua l Version 1 .0
8.2.17. Auto Feeder Valve
1. Turn off the gas supply.
2. Turn off the 120V power supply.
3. Turn off the water supply. Drain all
water(include heating water) from the
appliance.
4. Remove the four screws securing
the front panel. Remove front panel.
5. Pull out the PCB. (refer to 8.2.1
PCB)
6. Pull out the main gas valve. (refer to
8.2.9 Main Gas Valve.)
7. Remove the stainless nut from the
auto feeder valve body.
8. Loosen the auto feeder valve adap
tor 2 screw from bottom base.
9. Remove the fastener “D” pull out the
auto feeder valve.
10. Replace with auto feeder valve.
11. Tighten the auto feeder valve adap
tor 2 screw from bottom base.
11. Reseat the non-threaded of auto
feeder valve into the stainless fitting.
12. Replace the main gas valve.
13. Replace the PCB.
12. Install front panel using 4(four)
screws.
13. Turn on water supply, power
supply, and gas supply.
14. Open a hot water tap and ensure
there are no leaks at the boiler.
136
Figure 48
Figure 46
Figure 47
NOTE
1. Always use right part(O-ring) and
right size and place to pipe