Navien CH-180 Service Manual

Also see for CH-180: Owner's operation manual User's operation manual Installation manual Operation manual Installation manual

Contents

Navien CH-180 Service Manual Manual pdf 135 page image

©Navien America Inc. 2010 CH series service Manual Version 1.08.2.14. 3-way Valve1. Turn off the gas supply.2. Turn off the 120V power supply.3. Turn off the water supply. Drain allwater(include heating water) fromthe appliance.4. Remove the four screws securingthe front panel. Remove front panel.5. Pull out the PCB. (refer to 8.2.1PCB)6. Pull out the circulation pump. (referto 8.2.13 Circulation Pump)7. Loosen the heating water inlet pipe IIscrew from 3-way valve.17. Tighten the 4 screw from bottombase.18. Close the drain plug.19. Replace the PCB. (refer to 8.2.1PCB)20. Install front panel using 4(four)screws.21. Turn on water supply, powersupply, and gas supply.22. Check the operating circulationpump and ensure there are noleaks at the space heating pipingsystem inside the unit.23. Open air vent on top of pump torelease air8. Remove the stainless clip. (fastener “L-1”)9. Loosen the heating adaptor 2 screwfrom bottom base.10. Pull out the 3-way133Figure 39Figure 40NOTE1. Always use right part(O-ring) andright size and place to pipe2. Place black gasket ring on top ofthe circulation pump and screw onthe stainless nut; be sure not tocross thread; over tightening maydamage gasket