Daikin Altherma 3 M - Page 38

6 | Application guidelines
Installer reference guide
38
EBLA09~16DA + EDLA09~16DA
Daikin Altherma 3 M
4P620241-1 – 2020.06
▪ The underfloor heating of the main room is directly connected to the outdoor
unit – or to the external backup heater kit, if there is one.
▪ The room temperature of the main room is controlled by the dedicated Human
Comfort Interface (BRC1HHDA used as room thermostat).
▪ A thermostatic valve is installed before the underfloor heating in each of the
other rooms.
INFORMATION
Mind situations where the main room can be heated by another heating source.
Example: Fireplaces.
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 dedicated Human
Comfort Interface.
Number of water temperature zones:
▪ #: [4.4]
▪ Code: [7-02]
0 (Single zone): Main
Benefits
▪ Easy. Same installation as for one room, but with thermostatic valves.
Underfloor heating – Multiple external room thermostats
Setup
M1
M2
CB
b
c
b
a
A
A Main leaving water temperature zone
B Room 1
C Room 2
a User interface (delivered as accessory)
b External room thermostat
c Bypass valve
▪ For more information about connecting the electrical wiring to the unit, see
"9.2Connections to the outdoor unit"[491].
▪ For each room, a shut-off valve (field supplied) is installed to avoid leaving water
supply when there is no heating or cooling demand.
▪ A bypass valve must be installed to make water recirculation possible when all
shut-off valves are closed. To guarantee reliable operation, provide a minimum
water flow as described in table "To check the water volume and flow rate" in
"8.1Preparing water piping"[473].