Multiple Rooms - Two Lwt Zones - Daikin Altherma EHVH04S18CB3V Installer's Reference Manual

Configuration
Setting
Unit temperature control:
▪ #: [A.2.1.7]
▪ Code: [C-07]
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 in heating,
and the highest design temperature in cooling
▪ Additional zone = The other zone
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)/increase (in cooling) 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
ERLQ004~008CA + EHVH/X04+08S18+26CB
Daikin Altherma – Low temperature split
4P384973-1A – 2016.02
Value
0 (LWT control): Unit operation is
decided based on the leaving
water temperature.
0 (1 LWT zone): Main
Heat emitters: Design
temperature
Under floor heating:
▪ In heating: 35°C
▪ In cooling: 20°C (only
refreshment, no real cooling
allowed)
Heat pump convectors:
▪ In heating: 45°C
▪ In cooling: 12°C
A
C
B
a a
D
c
E
b
5 Application guidelines
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.
▪ 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 or cooling 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
Shut-off valve
At the mixing valve station
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. No separation between
heating or cooling demand.
Set to follow the thermo demand
of the main zone.
If the main zone must be shut off
during cooling mode to prevent
condensation on the floor, set it
accordingly.
Set the desired main leaving
water temperature for heating
and/or cooling.
Installer reference guide
15