Navien NPE-180A, Руководство по обслуживанию

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Replacement of Parts 131
5. Remove the 4 stainless steel clips from the connections (2
round clips and 2 flat clips).
Figure 30
6. Disconnect the wiring connector at the 2-way valve.
Figure 31
18. Use the 4 screws at the bottom of the case to fix the pump to
the unit.
19. Install front panel using 4 screws.
20. Turn on water supply, power supply, and gas supply to the
unit.
21. Open a hot water tap and ensure that there are no leaks at the
pump connections.
22. Open the air vent on top of pump to release air within the
system.
NOTE
Always use proper O-rings at the pump connection to ensure
tight seals
6.2.12 2-Way Valve
1. Turn off the gas supply to the unit.
2. Turn off the 120V power supply to the unit.
3. Turn off the water supply to the unit. Drain all water from the
appliance.
4. Remove the 3 screws at the hot water outlet fitting to loosen
the 2-way valve that is attached to the hot water outlet fitting.
Figure 29