Daikin Altherma 3 R F Installer's Reference Manual page 26

5 | Application guidelines
Installer reference guide
26
b User interface used as room thermostat
▪ For the main zone: the room temperature is controlled by the user interface,
which is used as room thermostat (optional equipment EKRUDAS).
▪ For the additional zone:
- The external thermostat is directly connected to the indoor unit.
- The desired room temperature is set via the external thermostat and the
thermostatic valves of the radiators in each room.
- The heating demand signal from the external thermostat is connected to the
digital input on the indoor unit (X2M/35a and X2M/30). The indoor unit will
only supply the desired additional leaving water temperature when there is an
actual demand.
▪ The user interface connected to the indoor unit decides the space operation
mode. Mind that the operation mode on each remote controller of the
heat pump convectors must be set to match the indoor unit.
Configuration
Setting
Unit temperature control:
▪ #: [A.2.1.7]
▪ Code: [C-07]
Number of water temperature zones:
▪ #: [A.8]
▪ Code: [7-02]
In case of heat pump convectors:
External room thermostat for the
additional zone:
▪ #: [A.8]
▪ Code: [C-06]
Shut-off valve output
Benefits
▪ Comfort. The smart room thermostat functionality can decrease or increase the
desired leaving water temperature based on the actual room temperature
(modulation).
▪ 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.
Value
2 (RT control): Unit operation is
decided based on the ambient
temperature of the user interface.
Note:
▪ Main room = user interface used as
room thermostat functionality
▪ Other rooms =
thermostat functionality
1 (2 LWT zones): Main + additional
1 (Thermo ON/OFF): When the used
external room thermostat or heat pump
convector can only send a hermos ON/
OFF condition. No separation between
heating or cooling demand.
Set to follow the hermos demand of the
main zone.
ERLA03DAV3 + EHFZ03S18DJ3V
external room
Daikin Altherma 3 R F
4P596821-1 – 2019.10