Cleaning The Heat Exchanger - Navien NPE-32AWE Installation Manual

6. Remove the recirculation inlet filter from the bottom of the
water heater ("A" model only).
Recirculation
Inlet Filter
("A" model only)
Pump Drain Plug
("A" model only)
7. Open the pump drain plug ("A" model only).
8. Remove the cold water inlet filter.
9. Allow the residual water to drain from the water heater.
10. When the water is completely drained, reinsert the
recirculation inlet filter and the cold water inlet filter, and
then close the pump drain plug.
11. To refill the water heater follow the steps of "Draining the
Water Heater" in reverse.

6.3 Cleaning the Heat Exchanger

Before cleaning the heat exchanger, make sure the water
heater is off.
To properly maintain the water heater, you should clean the heat
exchanger annually.
To clean the heat exchanger:
1. Press the Power button on the front panel to turn off the
water heater.
Cold Water
Inlet Filter
2. Disconnect the power supply to the water heater.
3. Turn off both gas and water supply to the water heater.
Note
4. To gain access to the internal components, remove the front
cover by loosening the four Phillips head screws located at
the top and bottom of the front cover assembly.
WARNING
Wait at least 30 minutes for the heat exchanger to
cool down.
Maintaining the Water Heater 43