4.9.13 DHW Heat Exchanger
Function
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
Failure Event
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.
Diagnostic
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.
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