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DEFROSTING
Your DHW HP is equipped with an automatic and continuous defrosting system. Defrosting becomes necessary, when
the evaporator gets iced after heavy-duty operation or operating with low ambient temperature.
DEFROSTING MODES:
The defrosting mode is model specific.
"Defrost Gas" – Defrosting with hot gas.
"Defrosting gas"
If the temperature at the evaporator < -2°C, the automatic defrosting procedure (by hot gas) starts. The bypass solenoid
valve now opens, the compressor will run and the fan is cut-off.
If the evaporator temperature reaches +5°C, the solenoid valve closes, and the fan restarts. If the temperature for the
evaporator does not reach +5°C within 20 minutes, the defrosting procedure will stop and switch back to normal
operating mode. If the evaporator temperature reaches -18°C or below the HP will be locked. The supplementary
heating "HP+EL" or "HP+BOIL" will continue, if selected, up to the set point of "T-min".
Note: The minimum interval between two defrosting cycles is 2 hours. Even if the evaporator temperature should fall to
or below -2°C in this period, the defrosting procedure will remain locked.
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