5 Application guidelines
Installer reference guide
16
EWAQ+005BAVP
Packaged air-cooled water chillers and packaged air to water heat
pumps
4P492900-1 – 2017.06
Combination: Under floor h Fan coil units -
Multiple rooms
Setup
e
B
C
A
d
M1
M1
b
a
c
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.
▪ 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
Value
Unit temperature control:
▪ #: [A.2.1.7]
▪ Code: [C-07]
0 (LWT control): Unit operation is
decided based on the leaving
water temperature.
Number of water temperature
zones:
▪ #: [A.2.1.8]
▪ Code: [7-02]
0 (1 LWT zone): Main
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
to
achieve
the
desired
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:
b
a
c
d
d
i
i
j
j
m
f
h
g
k
l
e
FHL1
FHL2
FHL3
a
Outdoor unit
b
Heat exchanger
c
Pump
d
Shut‑off valve
e
Backup heater (option)
f
Control box
g
User interface
h
Option box
i
Non‑return valve (field supply)
j
Shut‑off valve (field supply)
k
Collector (field supply)
l
Auxiliary boiler (field supply)
m
Aquastat valve (field supply)
FHL1...3
Under floor heating
NOTICE
▪ Make sure the auxiliary boiler and its integration in the
system complies with applicable legislation.
▪ Daikin is NOT responsible for incorrect or unsafe
situations in the auxiliary boiler system.
