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Combination: Under floor heating + Heat pump
convectors
Setup
A
B
M1
M1
A Main leaving water temperature zone
B Room 1
C Room 2
a External room thermostat
b Remote controller of the heat pump convectors
▪ For each room with heat pump convectors: The heat pump
convectors are directly connected to the indoor unit.
▪ For each room with under floor heating: Two shut-off valves (field
supply) are installed before the under floor heating:
▪ A shut-off valve to prevent hot water supply when the room has
no heating demand
▪ A shut-off valve to prevent condensation on the floor during
cooling operation of the rooms with heat pump convectors
▪ 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).
▪ The user interface connected to the indoor unit decides the space
operation mode. Mind that the operation mode on each external
room thermostat and remote controller of the heat pump
convectors must be set to match the indoor unit.
INFORMATION
To increase comfort and performance, Daikin recommends
to install the valve kit option EKVKHPC on each heat pump
convector.
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
ERHQ011~016BA + ERLQ011~016CA + EHVH/X16S18+26CA
Daikin Altherma - Low Temperature Split
4P313777-1C – 2012.11
C
b
a
Value
0 (LWT control): Unit operation is
decided based on the leaving
water temperature.
0 (1 LWT zone): Main
5 Application guidelines
▪ 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
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.
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
Installer reference guide
11
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