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Installer reference guide
11
EHBH/X16
Daikin Altherma - Low Temperature Split
4P313776-1 – 2012.05
5 Application guidelines
Configuration
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:
Q
Main zone = Zone with the lowest design temperature in
heating, and the highest design temperature in cooling
Q
Additional zone = The other zone
Typical example:
Setup
Q
For the main zone:
Q
A mixing valve station is installed before the under floor
heating.
Q
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).
Q
The room temperature is controlled by the user interface,
which is used as room thermostat.
Q
For the additional zone:
Q
The heat pump convectors are directly connected to the
indoor unit.
Q
The desired room temperature is set via the remote
controller of the heat pump convectors for each room.
Q
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.
Q
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.
NOTICE
To increase comfort and performance, Daikin recommends
to install the valve kit option EKVKHPC on each heat pump
convector.
Setting
Value
Unit temperature control:
Q
#: [A.2.1.7]
Q
Code: [C-07]
0 (LWT control): Unit operation is
decided based on the leaving
water temperature.
Number of water temperature
zones:
Q
#: [A.2.1.8]
Q
Code: [7-02]
0 (1 LWT zone): Main
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.
Room (zone)
Heat emitters: Design
temperature
Living room (main zone)
Under floor heating:
Q
In heating: 35°C
Q
In cooling: 20°C (only
refreshment, no real cooling
allowed)
Bed rooms (additional zone)
Heat pump convectors:
Q
In heating: 45°C
Q
In cooling: 12°C
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
B
A
a
a
C
E
D
b
c
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