Daikin EBLA09D V3 Series Installer's Reference Manual page 46

6 | Application guidelines
Installer reference guide
46
▪ Bivalent operation is only possible if
- Space heating is turned ON, and
- DHW tank operation is turned OFF.
▪ Domestic hot water is always produced by the DHW tank connected to the
outdoor unit.
INFORMATION
▪
During heating operation of the heat pump, the heat pump operates to achieve
the desired temperature set via the user interface. When weather-dependent
operation is active, the water temperature is determined automatically
depending on the outdoor temperature.
▪
During heating operation of the auxiliary boiler, the auxiliary boiler operates to
achieve the desired water temperature set via the auxiliary boiler controller.
Setup
▪ Integrate the auxiliary boiler as follows:
A
A Main leaving water temperature zone
B One single room
a User interface (delivered as accessory)
b Dedicated Human Comfort Interface (BRC1HHDA used as room thermostat)
c Non-return valve (field supply)
d Shut-off valve (field supply)
e Auxiliary boiler (field supply)
f Aquastat valve (field supply)
NOTICE
▪
Make sure the auxiliary boiler and its integration in the system complies with
applicable legislation.
▪
Daikin is NOT responsible for incorrect or unsafe situations in the auxiliary boiler
system.
▪ Make sure the return water to the heat pump does NOT exceed 60°C. To do so:
- Set the desired water temperature via the auxiliary boiler controller to
maximum 60°C.
- Install an aquastat valve in the return water flow of the heat pump. Set the
aquastat valve to close above 60°C and to open below 60°C.
▪ Install non-return valves.
B
f
d
e
d
c
c
a
b
EBLA09~16D + EDLA09~16D
Daikin Altherma 3 M
4P620241-1B – 2022.05