Setting Up An Auxiliary Heat Source For Space Heating - Daikin Altherma 3 R F Installer's Reference Manual

5 | Application guidelines

5.3 Setting up an auxiliary heat source for space heating

Installer reference guide
34
Setting
Shut-off valve output
Shut-off valve
At the mixing valve station
Benefits
▪ Comfort.
- The smart room thermostat functionality can decrease or increase the desired
leaving water temperature based on the actual room temperature
(modulation).
- The combination of the two heat emitter systems provides the excellent
heating comfort of the underfloor heating, and the excellent cooling comfort of
the heat pump convectors.
▪ Efficiency.
- Depending on the demand, the indoor unit supplies different leaving water
temperature matching the design temperature of the different heat emitters.
- Underfloor heating has the best performance with the heat pump system.
▪ Space heating can be done by:
- The indoor unit
- An auxiliary boiler (field supply) connected to the system
▪ When the room thermostat requests heating, the indoor unit or the auxiliary
boiler starts operating depending on the outdoor temperature (status of the
changeover to external heat source). When the permission is given to the
auxiliary boiler, the space heating by the indoor unit is turned OFF.
▪ Bivalent operation is only possible for space heating, NOT for domestic hot water
production. Domestic hot water is always produced by the DHW tank connected
to the indoor 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:
Value
Set to follow the thermo demand of the
main zone.
If the main zone must be shut off during
cooling mode to prevent condensation
on the floor, set it accordingly.
Set the desired main leaving water
temperature for heating and/or cooling.
ERGA04~08DAV3(A) + EHVH/X04+08S18+23DA/DJ3V+6V+9W7
Daikin Altherma 3 R F
4P618947-1 – 2020.03