Setting Up An Auxiliary Heat Source For Space Heating - Daikin EWAQ006BAVP Installer's Reference Manual

5 Application guidelines
C Room 2
a User interface
b Control box
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.
Combination: Under floor heating + Fan coil units -
Multiple rooms
Setup
c
b
a
A Main leaving water temperature zone
B Room 1
C Room 2
a User interface
b Control box
c Backup heater (option)
d External room thermostat
e Remote controller of the fan coil units
▪ For each room with fan coil units: The fan coil units are directly
connected to the outdoor unit – or to the backup heater, if there is
one.
Installer reference guide
16
Value
1 (Ext RT control): Unit operation
is decided by the external
thermostat.
0 (1 LWT zone): Main
A
B C
M1
M1
e
d
▪ 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 fan coil units.
▪ For each room with fan coil units: The desired room temperature
is set via the remote controller of the fan coil units.
▪ For each room with under floor heating: The desired room
temperature is set via the external room thermostat (wired or
wireless).
▪ The main user interface (connected to control box EKCB07CAV3)
decides the space operation mode. Mind that the operation mode
of each external room thermostat and fan coil unit remote
controller must be set to match that of the main user interface.
Configuration
Setting
Unit temperature control:
▪ #: [A.2.1.7]
▪ Code: [C-07]
Number of water temperature
zones:
▪ #: [A.2.1.8]
▪ Code: [7-02]
5.3 Setting up an auxiliary heat source
for space heating
▪ Space heating can be done by:
▪ The outdoor unit
▪ An auxiliary boiler (field supply) connected to the system
▪ When the room thermostat requests heating, the outdoor unit or
the auxiliary boiler starts operating depending on the outdoor
temperature (status of the changeover to external heat source).
When the permission is given to the auxiliary boiler, the space
heating by the outdoor unit is turned OFF.
▪ Bivalent operation is only possible for space heating.
INFORMATION
For bivalent operation to be possible, the system requires
option box EK2CB07CAV3.
INFORMATION
▪ During heating operation of the heat pump, the
heat pump operates
temperature set via the user interface. When weather-
dependent operation is active, the water temperature is
determined automatically depending on the outdoor
temperature.
▪ During heating operation of the auxiliary boiler, the
auxiliary boiler operates to achieve the desired water
temperature set via the auxiliary boiler controller.
Setup
▪ Integrate the boiler as follows:
EWAQ+EWYQ006+008BAVP + EK(2)CB07CAV3 +
Packaged air-cooled water chillers and packaged air to water heat
Value
0 (LWT control): Unit operation is
decided based on the leaving
water temperature.
0 (1 LWT zone): Main
to achieve the desired
EKMBUHCA3V3+9W1
pumps
4P492901-1 – 2017.06