Navien NCB500-2S/37K User Manual

Replacement of Parts 101
6.2.12 DHW Heat exchanger
1. Turn off the gas supply to the unit.
2. Turn off the 230V power supply to the unit.
3. Turn off the water supply to the unit. Drain all water from
the appliance.
4. Remove the gas supply unit.
5. Remove the two screws at the DHW exchanger.
Figure 23
6. Replace with the new DHW Exchanger.

Navien NCB500-2S/37K Specifications

General

Brand	Navien
Model	NCB500-2S/37K
Category	Boiler
Language	English