Daikin Altherma EHBH08DA6V7 - Page 33

5 | Application guidelines
Installer reference guide
33
ERGA04~08DAV3(A) + EHBH/X04+08DA*V7
Daikin Altherma 3 R W
4P618958-1 – 2020.03
D Main leaving water temperature zone
E Room 3
a Remote controller of the heatpump convectors
b User interface used as room thermostat
c Mixing valve station
d Pressure regulating valve
INFORMATION
A pressure regulating valve should be implemented before the mixing valve station.
This is to guarantee the correct water flow balance between the main leaving water
temperature zone and the additional leaving water temperature zone in relation to
the required capacity of both water temperature zones.
▪ For the main zone:
- A mixing valve station is installed before the underfloor heating.
- The pump of the mixing valve station is controlled by the ON/OFF signal on the
indoor unit (X2M/29 and X2M/21; normally closed shut-off valve output).
- The room temperature is controlled by the user interface, which is used as
room thermostat (optional equipment EKRUDAS).
▪ For the additional zone:
- The heatpump convectors are directly connected to the indoor unit.
- The desired room temperature is set via the remote controller of the
heatpump convectors for each room.
- The heating or cooling demand signals of each heat pump convector are
connected in parallel to the digital input on the indoor unit (X2M/35 and
X2M/30). The indoor unit will only supply the desired additional leaving water
temperature when there is an actual demand.
▪ The user interface integrated in 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 Value
Unit temperature control:
▪ #: [2.9]
▪ Code: [C-07]
2 (Room thermostat): 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 = external room
thermostat functionality
Number of water temperature zones:
▪ #: [4.4]
▪ Code: [7-02]
1 (Dual zone): Main + additional
In case of heatpump convectors:
External room thermostat for the
additional zone:
▪ #: [3.A]
▪ Code: [C-06]
1 (1 contact): When the used
external room thermostat or heatpump
convector can only send a thermo ON/
OFF condition. No separation between
heating or cooling demand.