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INFORMATION
Mind situations where the main room can be heated by
another heating source. Example: Fireplaces.
Configuration
Setting
Unit temperature control:
▪ #: [A.2.1.7]
▪ Code: [C-07]
Number of water temperature
zones:
▪ #: [A.2.1.8]
▪ Code: [7-02]
Benefits
▪ Cost effective.
▪ Easy. Same installation as for one room, but with thermostatic
valves.
Under floor heating or radiators – Multiple external
room thermostats
Setup
c
b
A
Main leaving water temperature zone
B
Room 1
C
Room 2
a
User interface
b
Control box
c
Backup heater (option)
d
Bypass valve
e
External room thermostat
▪ For each room, a shut-off valve (field supplied) is installed to avoid
leaving water supply when there is no heating or cooling 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 23.
▪ The main user interface (connected to control box EKCB07CAV3)
decides the space operation mode. Mind that the space operation
mode of the additional user interfaces (used as room thermostat)
must be set to match that of the main user interface.
▪ 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]
EWAQ+EWYQ004+005BAVP
Packaged air-cooled water chillers and packaged air to water heat
pumps
4P492900-1 – 2017.06
Value
2 (RT control): Unit operation is
decided based on the ambient
temperature of the user interface.
0 (1 LWT zone): Main
A
B
C
M1
M2
a
e
e
"6.3 Preparing water
Value
0 (LWT control): Unit operation is
decided based on the leaving
water temperature.
Setting
Number of water temperature
zones:
▪ #: [A.2.1.8]
▪ Code: [7-02]
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.
Fan coil units - Multiple rooms
Setup
A
Main leaving water temperature zone
B
Room 1
C
Room 2
a
User interface
b
Control box
d
c
Backup heater (option)
d
Remote controller of the fan coil units
▪ The desired room temperature is set via the remote controller of
the fan coil units.
▪ The main user interface (connected to control box EKCB07CAV3)
decides the space operation mode.
▪ The heating demand signals of each fan coil unit can be
connected in parallel to the digital input on control box
EKCB07CAV3 (X2M/1 and X2M/2) (if this signal is available on
the fan coil units and compatible with the control box). The
outdoor unit will only supply leaving water temperature when there
is an actual demand.
Configuration
Setting
Unit temperature control:
▪ #: [A.2.1.7]
▪ Code: [C-07]
Number of water temperature
zones:
▪ #: [A.2.1.8]
▪ Code: [7-02]
Benefits
Compared with fan coil units for one room:
▪ Comfort. You can set the desired room temperature, including
schedules, for each room via the remote controller of the fan coil
units.
5 Application guidelines
Value
0 (1 LWT zone): Main
A
C
B
c
b
d
d
a
Value
1 (Ext RT control): Unit operation
is decided by the external
thermostat.
0 (1 LWT zone): Main
Installer reference guide
15
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