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40_ Operating advanced function
Operating advanced function
FIELD SETTING MODE
Space Heating : Code 40✴✴
T
a
#4012
#3034
T
u
T
s
DHW by Booster Heater Only
Field Setting Value
Main Menu &
Code
Sub Menu Function Description
Sub
Code
Default Min Max Step Unit
Heating
Code 40✴✴
Heat Pump Heating/DHW Priority ✴✴11 0(DHW) 0 1(Heating) - -
Outdoor Temp for Priority
✴✴12 0 -15 20 1 ˚C
Heating Off
✴✴13 25 14 35 1 ˚C
Overshoot ✴✴14 2 1 4 1 ˚C
Backup Heater Application ✴✴21 1(On) 0(Off) 1 - -
BUH/BSH Priority ✴✴22 0(Both) 0 2(BSH) 1 -
For back-up use only ✴✴23 1(On) 0(Off) 1 - -
Threshold Temp
✴✴24 0 -15 35 1 ˚C
Backup Boiler Application ✴✴31 0(No) 0 1(Yes) - -
Boiler Priority ✴✴32 0(Off) 0 1(On) - -
Threshold Temp
✴✴33 -15 -20 5 1 ˚C
Heat Pump Variables for Space Heating
• FSV #4011 for DHW priority is set to “0(DHW)”(Default) for the first time. In case of
“1(Heating)”, the space heating by heat pump has a priority over the DHW heating by heat
pump under the low outdoor temperature condition(#4012).
• DHW compensation temperature in case of space heating priority:
At low outdoor temperature, the target temperature of DHW tank will be increased by the
temperature difference defined in FSV #3034 to compensate the relatively cold water stored
in DHW tank. In this case, the only heat source for DHW tank would be booster heater
inside tank, so the lower part of water stored in tank could be cold due to “No operation of
heat pump”. The corrected (higher) set point will make sure that the total heat capacity of
the water in the tank remains approximately unchanged, by compensating for the colder
bottom water layer of the tank (because the heat exchanger coil is not operational) with a
warmer top layer.
• Space heating off temperature(FSV #4013, Default “25˚C”, Range 14 ~ 35˚C):
At high outdoor temperature above this value, the space heating will be turned off, to avoid
overheating.
• Overshoot temperature(FSV #4014, Default “2˚C”, Range 1 ~ 4˚C): N/A yet