Daikin Altherma EJHA04AAV3 Installer's Reference Manual page 20

7 Application guidelines
Benefits
▪ Cost effective. You do NOT need an additional external room
thermostat.
▪ Easy. Same installation as for one room, but with thermostatic
valves.
Under floor heating or radiators – Multiple external
room thermostats
Setup
A Main leaving water temperature zone
B Room 1
C Room 2
a User interface
b External room thermostat
c Bypass valve
▪ For each room, a shut-off valve (field supplied) is installed to avoid
leaving water supply when there is no heating 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
piping" on page 26.
▪ The room thermostats are connected to the shut-off valves, and
do NOT have to be connected to the outdoor unit. The outdoor
unit will supply leaving water all the time, with the possibility to
program a leaving water schedule.
Configuration
Setting
Unit temperature control:
▪ #: [A.2.1.7]
▪ Code: [C-07]
Benefits
Compared with under floor heating or radiators for one room:
▪ Comfort. You can set the desired room temperature, including
schedules, for each room via the room thermostats.
Heat pump convectors – Multiple rooms
Setup
A Main leaving water temperature zone
B Room 1
Installer reference guide
20
A
B C
M1 M2
b b
a
"8.3 Preparing water
Value
0 (LWT control): Unit operation is
decided based on the leaving
water temperature.
A
C
B
b b
a
C Room 2
a User interface
b Remote controller of the heat pump convectors
▪ The desired room temperature is set via the remote controller of
the heat pump convectors.
▪ The heating demand signals of each heat pump convector are
connected in parallel to the digital input on the gas boiler (X4/6
and X4/7). The outdoor unit will only supply leaving water
temperature when there is an actual demand.
INFORMATION
To increase comfort and performance, Daikin recommends
to install the valve kit option EKVKHPC on each heat pump
convector.
Configuration
c
Setting
Unit temperature control:
▪ #: [A.2.1.7]
▪ Code: [C-07]
Benefits
Compared with heat pump convectors for one room:
▪ Comfort. You can set the desired room temperature, including
schedules, for each room via the remote controller of the
heat pump convectors.
Combination: Under floor heating + Heat pump
convectors – Multiple rooms
Setup
A Main leaving water temperature zone
B Room 1
C Room 2
a User interface
b External room thermostat
c Remote controller of the heat pump convectors
▪ The outdoor unit is connected in series with the gas boiler.
▪ For each room with heat pump convectors: The heat pump
convectors are directly connected to the gas boiler.
▪ For each room with under floor heating: A shut-off valve (field
supply) is installed before the under floor heating. It prevents hot
water supply when the room has no heating demand.
▪ For each room with heat pump convectors: The desired room
temperature is set via the remote controller of the heat pump
convectors.
▪ For each room with under floor heating: The desired room
temperature is set via the external room thermostat (wired or
wireless).
INFORMATION
To increase comfort and performance, Daikin recommends
to install the valve kit option EKVKHPC on each heat pump
convector.
Value
1 (Ext RT control): Unit operation
is decided by the external
thermostat.
A
B C
M1
c
a
b
EJHA04AAV3 + EHY2KOMB28+32AA
Daikin Altherma Hybrid hydrosplit heat pump
4P531180-1 – 2018.06