Daikin Altherma 3 GEO Series - Symptom: The water at the tap is too cold; Symptom: Heat pump failure

5 | Application guidelines
Installer reference guide
31
EGSAH/X06+10UDA9W
Daikin Altherma 3 GEO
4P598592-1A – 2019.12
Underfloor heating or radiators – Multiple external room thermostats
Setup
M1M2
C B
A
a
c
a
b
A Main leaving water temperature zone
B Room 1
C Room 2
a External room thermostat
b Remote outdoor sensor
c Bypass valve
▪ For more information about connecting the electrical wiring to the unit, see
"8.2 Overview of electrical connections for external and internal
actuators"[480].
▪ 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.
▪ 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 or radiators for one room:
▪ Comfort. You can set the desired room temperature, including schedules, for
each room via the room thermostats.