Daikin Altherma EHFH03S18D 3V Series Installer's Reference Manual page 41

ERLA03D + EHFH03S18D
Daikin Altherma 3 R F
4P596806-1C – 2022.09
▪ 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 (EKRUDAL1).
- In cooling mode, you can allow the underfloor heating (main zone) to provide
refreshment (no real cooling), or NOT allow it.
If allowed:
Do NOT install a shut-off valve.
Set [F-0C]=0.
Set the leaving water temperature of the main zone NOT too low (typically:
20°C)
If NOT allowed:
Install a shut-off valve (field supply) and connect it to:
- X2M/21+28 for a normally open valve, OR
- X2M/21+29 for a normally closed valve
In this case, the main zone cooling setpoint will NOT be adjustable. The cooling
setpoint for the heat pump convectors can be adjusted via the additional zone
setpoint screen.
▪ 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 connected to 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:
▪ #: [A.2.1.7]
▪ Code: [C-07]
Number of water temperature zones:
▪ #: [A.2.1.8]
▪ Code: [7-02]
6 Application guidelines
|
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
external room
Installer reference guide
41