Cleaning The Domestic Cold Filter (Dhw Side) - Navien NCB-190/060H User's Information Manual

5. Remove the drain cap on the manifold system
to drain the boiler.
Drain Cap
Place a bucket under the boiler
Note
●
to gather water released from the
manifold system.
Do not allow the pump to become
●
wet.
4.3 Cleaning the Domestic Cold
Filter (DHW side)
To clean the filter:
1. Drain the DHW side of the boiler. Refer to "4.2
Draining the Boiler" on page 14.
2. While the filter is removed, rinse it with clean
running water (cold) and, if necessary, scrub it
clean with a brush.
Drain Cap
3. Reinsert and tighten the filter.
4. Fill the boiler and check for proper operation.
Maintaining the Boiler 15