Multiple Rooms - Two Lwt Zones - Daikin Altherma EHVH08SU18CB6W Installer's Reference Manual

5 Application guidelines
Setting
Number of water temperature
zones:
▪ #: [A.2.1.8]
▪ Code: [7-02]
5.2.3 Multiple rooms – Two LWT zones
If the heat emitters selected for each room are designed for different
leaving water temperatures, you can use different leaving water
temperature zones (maximum 2).
In this document:
▪ Main zone = Zone with the lowest design temperature
▪ Additional zone = Zone with the highest design temperature
CAUTION
When there is more than one leaving water zone, you must
ALWAYS install a mixing valve station in the main zone to
decrease (in heating) the leaving water temperature when
the additional zone has demand.
Typical example:
Room (zone)
Living room (main zone)
Bed rooms (additional zone)
Setup
d
A Additional leaving water temperature zone
B Room 1
C Room 2
D Main leaving water temperature zone
E Room 3
a Remote controller of the heat pump convectors
b User interface
c Mixing valve station
d Pressure regulating valve
INFORMATION
A pressure regulating valve should be implemented before
the mixing valve station. This is to guarantee the correct
water flow balance between the main leaving water
temperature zone and the additional leaving water
temperature zone in relation to the required capacity of
both water temperature zones.
Installer reference guide
16
Value
0 (1 LWT zone): Main
Heat emitters: Design
temperature
Under floor heating: 35°C
Heat pump convectors: 45°C
A
C
B
a a
D
c
E
b
▪ For the main zone:
▪ A mixing valve station is installed before the under floor heating.
▪ The pump of the mixing valve station is controlled by the ON/
OFF signal on the indoor unit (X2M/5 and X2M/7; normal closed
shut-off valve output).
▪ The room temperature is controlled by the user interface, which
is used as room thermostat.
▪ For the additional zone:
▪ The heat pump convectors are directly connected to the indoor
unit.
▪ The desired room temperature is set via the remote controller of
the heat pump convectors for each room.
▪ The heating demand signals of each heat pump convector are
connected in parallel to the digital input on the indoor unit
(X2M/1 and X2M/4). The indoor unit will only supply the desired
additional leaving water temperature when there is an actual
demand.
▪ The user interface connected to the indoor unit decides the space
operation mode. Mind that the operation mode on each remote
controller of the heat pump convectors must be set to match the
indoor unit.
Configuration
Setting
Unit temperature control:
▪ #: [A.2.1.7]
▪ Code: [C-07]
Number of water temperature
zones:
▪ #: [A.2.1.8]
▪ Code: [7-02]
In case of heat pump convectors:
External room thermostat for the
additional zone:
▪ #: [A.2.2.5]
▪ Code: [C-06]
Shut-off valve output
At the mixing valve station
Benefits
▪ Comfort.
▪ The smart room thermostat functionality can decrease or
increase the desired leaving water temperature based on the
actual room temperature (modulation).
▪ The combination of the two heat emitter systems provides the
excellent heating comfort of the under floor heating, and the
rapid air heat up of the heat pump convectors (e.g., living
room=under floor heating and the bedroom=convector (no
continuous heating)).
ERLQ004~008CA + EHVH04+08SU18+26CB6W
Value
2 (RT control): Unit operation is
decided based on the ambient
temperature of the user interface.
Note:
▪ Main room = user interface
used as room thermostat
functionality
▪ Other rooms = external room
thermostat functionality
1 (2 LWT zones): Main +
additional
1 (Thermo ON/OFF): When the
used external room thermostat or
heat pump convector can only
send a thermo ON/OFF
condition.
Set to follow the thermo demand
of the main zone.
Set the desired main leaving
water temperature.
Daikin Altherma – Low temperature split
4P449978-1B – 2018.07