Daikin EPRA18DAV3 Installer's Reference Manual page 38

5 | Application guidelines
Installer reference guide
38
▪ 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 dedicated Human Comfort
Interface (BRC1HHDA used as room thermostat).
▪ For the additional zone:
- The heat pump convectors are directly connected to the indoor unit.
- The desired room temperature is set via the controller of the heat pump
convectors. There are different controllers and setups possible for the heat
pump convectors. For more information, see:
The installation manual of the heat pump convectors
The installation manual of the heat pump convector options
The addendum book for optional equipment
- The heating or cooling demand signals of each heat pump convector are
connected in parallel 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 integrated in the indoor unit decides the space operation
mode. Mind that the operation mode on each controller of the heat pump
convectors must be set to match the indoor unit.
Configuration
Setting
Unit temperature control:
▪ #: [2.9]
▪ Code: [C-07]
Number of water temperature zones:
▪ #: [4.4]
▪ Code: [7-02]
In case of heat pump convectors:
External room thermostat for the
additional zone:
▪ #: [3.A]
▪ Code: [C-06]
Shut-off valve output
Shut-off valve
Value
2 (Room thermostat): Unit operation
is decided based on the ambient
temperature of the dedicated Human
Comfort Interface.
Note:
▪ Main room = dedicated Human
Comfort Interface used as room
thermostat functionality
▪ Other rooms =
thermostat functionality
1 (Dual zone): Main + additional
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.
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.
EPRA14~18DAV3+W1 + ETVH/X16S18+23DA6V+9W(G)
external room
Daikin Altherma 3 H HT F
4P587502-1B – 2020.12