Domestic Hot Water Heat Pump Service Manual
16
7.2 P2 ECO mode
This is the standard operation mode for the domestic hot water heat pump.
The temperature is set from main menu, by pressing the ’OK’ button.
Select ‘A Temperatures’ and then A2 ECO to set temperature for eco mode, default set point is
50°C.
As long as the air inlet temperature, BT1, is within the specified temperature range, default -7 ~
+40°C then the DHW-HP will operate normally, if BT1 temperature is outside of its operating range
then the water will be heated using the electrical heater only.
The temperature level at which the DHW-HP
heats the water when ECO mode is selected.
The DHW-HP will then heat the water to set point using the heat pump only.
If the water temperature, BT3, reduces by 5°C then the DHW-HP will start to reheat the water
temperature back to set point.
DHW-HP starts operation on selection of ECO mode, T ECO <SP -5k
DHW-HP stops when BT3 = T ECO SP (50°C factory setting)
DHW-HP restarts when T ECO = SP -5k
DHW-HP stops when BT3 = T ECO SP (50°C factory setting)
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T1 T air in T3 T water top
HP_OnTemp HP_OffTemp
R3 Fan R4 Comp
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