Cleaning The Strainer (Space Heating Side); Cleaning The Air Intake Filter - Navien NCB-180 User's Information Manual

4.4 Cleaning the Strainer (Space Heating
side)
If the heating performance is decreased, you can increase the
heating performance by filtering impurities from the system.
To clean the strainer:
1. Drain the space heating side of the boiler. Refer to "4.2
Draining the Boiler" on page 12.
2. Remove the clip and then remove the strainer.
3. While the strainer is removed, rinse it with clean running water
(cold).
4. Reinsert and tighten the strainer.
5. Fill the boiler and check for proper operation.
14 Maintaining the Boiler

4.5 Cleaning the Air Intake Filter

If the air intake filter becomes clogged by dust or lint, the boiler
will cease to operate and "Error Code 110" will appear on the front
panel display. To properly maintain the boiler, you should clean the
air intake filter every 3-4 months.
To clean the air intake filter:
1. Press the Power button on the front panel to turn off the boiler.
2. Disconnect the power supply to the boiler.
3. Remove the front cover of the boiler.
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