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Application guidelines
Installer reference guide
41
EPRA14~W1 + ETSH/X(B)16P30+50EF
Daikin Altherma 3 H HT ECH₂O
4P679467-1 – 2022.02
Underfloor heating or radiators – Multiple external room thermostats
Setup
M1
M2
C
B
a
a
A
A
Main leaving water temperature zone
B
Room 1
C
Room 2
a
External room thermostat
▪
For more information about connecting the electrical wiring to the unit, see:
-
"9.2 Connections to the outdoor unit"
-
"9.3 Connections to the indoor unit"
▪
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
▪
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.
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