Circulation Pump ("A"Series) - Navien NP-180 Service Manual

8.2.15.

Circulation Pump ("A"Series)

1. Turn off the gas supply.
2. Turn off the 120V power supply.
3. Turn off the water supply. Drain all water
from the appliance.
4. Loosen the PCB 2 screw from bottom base.
5. Remove the pump connecting housing into
the PCB.
< Figure 39 >
6. Pull out the PCB. (refer to 8.2.1 PCB)
7. Open the drain plug on the pump.
8. Loosen the screw from the 3-way valve.
Loosen the 3 screw from bottom base.
9. Remove the stainless clip.
< Figure 40 >
©Navien America Inc. 2010
10. Loosen the screw from pump bracket.
11. Remove the brass (stainless) nut from the
pump.
12. Pull out the pump.
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NR/NP series service Manual
< Figure 41 >
< Figure 42 >
Version 2.0