EKHBH/X008BB
Indoor unit for air to water heat pump system
4PW62570-1A – 01.2011
Installation manual
8
1
Outdoor unit
2
Indoor unit
3
Heat exchanger
4
Backup heater
(1)
5
Pump
6
Shut-off valve
7
Motorised 3-way valve (delivered with domestic hot water
tank)
8
Non-return valve (field supply)
9
Shut-off valve (field supply)
10
Collector (field supply)
11
Boiler (field supply)
12
Aquastat valve (field supply)
13
Domestic hot water tank (optional)
14
Booster heater
(2)
15
Heat exchanger coil
FHL1...3
Floor heating loop
Field wiring configuration A
B
TI
Boiler thermostat input
A
Auxiliary contact (normal closed)
H
Heating demand room thermostat (optional)
K1A
Auxiliary relay for activation of EKHB* unit (field supply)
K2A
Auxiliary relay for activation of boiler (field supply)
Field wiring configuration B
B
TI
Boiler thermostat input
C
Cooling demand room thermostat (optional)
H
Heating demand room thermostat (optional)
Com
Common room thermostat (optional)
K1A
Auxiliary relay for activation of boiler unit (field supply)
KCR
Permission signal for the auxiliary boiler
Operation
■
Configuration A
When the room thermostat requests heating, either the EKHB*
unit or the boiler starts operating, depending on the position of
the auxiliary contact (A).
■
Configuration B
When the room thermostat requests heating, either the EKHB*
unit or the boiler starts operating, depending on the outdoor
temperature (status of "permission signal for the auxiliary
boiler").
When the permission is given towards the boiler, the space
heating operation by the EKHB* unit will be automatically
switched off.
For more details see field setting [C-02~C-04].
(1) For tank without electrical booster heater (EKHTS), the backup heater will
be used in domestic water heating mode.
(2) Only applicable for tank with built-in electrical booster heater (EKHW*).
M
FHL1
FHL2
FHL3
8
8
9
9
12
11
6
10
4
5
3
2
1
6
7
13
14 15
1
2
3
4
K1A
K1A
K2A
X Y
K2A
BTI
L
N
EKHB*/auto
/
Boiler
A
EKHB*
X2M
H
Com
NOTICE
■
Configuration A
Make sure that auxiliary contact (A) has sufficient
differential or time delay so as to avoid frequent
changeover between the EKHB* unit and the boiler. If
the auxiliary contact (A) is an outdoor temperature
thermostat, make sure to install the thermostat in the
shade, so that it is not influenced or turned ON/OFF
by the sun.
Configuration B
Make sure that the bivalent hysteresis [C-04] has
sufficient differential to avoid frequent changeover
between the EKHB* unit and the boiler. As the
outdoor temperature is measured via the outdoor unit,
air thermistor make sure to install the outdoor unit in
the shade, so that it is not influenced by the sun.
Frequent switching may cause corrosion of the boiler
in an early stage. Contact the manufacturer of the
boiler.
■
During heating operation of the EKHB* unit, the unit
will operate so as to achieve the target leaving water
temperature as set on 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 boiler, the boiler will
operate so as to achieve the target leaving water
temperature as set on the boiler controller.
Never set the target leaving water temperature set
point on the boiler controller above 55°C.
■
Make sure to only have 1 expansion vessel in the
water circuit. An expansion vessel is already
premounted in the Daikin indoor unit.
NOTICE
Make sure to configure the DIP switch SS2-3 on the PCB
of the EKHB* switch box correctly. Refer to
thermostat installation configuration" on page 24
For configuration B: Make sure to configure the field
settings [C-02, C-03 and C-04] correctly. Refer to
X1 X2
X Y
K1A
KCR
EKRP1HB*
BTI
1
2
3
4
H C
Com
K1A
EKHB*
X2M
EKRTR*
1
2
3
4
C
Com
H
K1A
EKHB*
X2M
EKRTW*
