Daikin Altherma 3 R W - Weather-Dependent Curves

6 | Application guidelines
Installer reference guide
40
ERLA11~16D + EBBH/X11+16D
Daikin Altherma 3 R W
4P643603-1B – 2022.05
Underfloor heating – Multiple external room thermostats
Setup
M1
M2
CB
A
a
b
a
A Main leaving water temperature zone
B Room 1
C Room 2
a External room thermostat
b Bypass valve
▪ For more information about connecting the electrical wiring to the unit, see:
- "9.2Connections to the outdoor unit"[4120]
- "9.3Connections to the indoor unit"[4123]
▪ 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
"8.5Preparing water piping"[4106].
▪ The user interface integrated in the indoor unit decides the space operation
mode. Mind that the operation mode on each room thermostat must be set to
match the indoor unit.
▪ The room thermostats are connected to the shut-off valves, but do NOT have to
be connected to the indoor unit. The indoor unit will supply leaving water all the
time, with the possibility to program a leaving water schedule.
Configuration
Setting Value
Unit temperature control:
▪ #: [2.9]
▪ Code: [C-07]
0 (Leaving water): Unit operation is
decided based on the leaving water
temperature.
Number of water temperature zones:
▪ #: [4.4]
▪ Code: [7-02]
0 (Single zone): Main
Benefits
Compared with underfloor heating for one room: