Dhw Heat Exchanger - Navien NCB-180 Service Manual

4.9.13 DHW Heat Exchanger

Part
Function
Failure Event
Effects
Error Code
Diagnostic
72 NCB Service Manual
Water heated in the primary/secondary heat exchanger is circulated to the plate heat exchanger,
where the heat of heating water and tap water are exchanged so that hot water is available
1. Water leakage through a crack.
2. Improper heat transfer can cause the cold water in heat exchanger
Temperature fluctuations in the hot water outlet and/or leaking.
E016, E030, E353
The plate heat exchanger filters out impurities in space heating pipes to prevent heating problems
caused by impurities.
Leak in plate heat exchanger will cause pressure in space heating side to increase to tap water pressure
level.
Heat Flow
Heat Flow
Return
Check Point
Hot Water
Cold Water
Cold Water
Hot Water
Version 1.0