Kaisai KHY-12PY3, User Manual

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0 – Charging pump for domestic hot water tank. Pump used in the case of an additional heat ex-
changer between the unit and the DHW tank, separating the circuits.
1– Circulation pump for domestic hot water - After turning on the tap with hot water in the bath-
room or kitchen sink, the user expects immediate delivery of hot water. The circulation pump main-
tains the flow of hot water throughout the water installation, making it instantly available at all taps.
If the user requires continuous access to hot water, option 1 can be selected and this pump can be
connected to the heat pump.
There are a total of 3 available time settings, and the operational logic and interface are identical
to the on/off timer.
ON:
After setting the desired time, the signal from the hot water circulation pump port will be transmit-
ted to the hot water circulation pump.
Screenshot
2– Off signal during defrosting - in winter, some users wish to turn off the water pump from the
buffer tank so that only the heat from the buffer tank is used for defrosting.