08 + ERLQ004~008
Daikin Altherma - Low Temperature Split
4P313774-1 – 2012.05
Installer reference guide
14
5 Application guidelines
Setup
Q
Integrate the auxiliary boiler as follows:
Q
Make sure the return water to the heat pump does NOT exceed
55°C. To do so:
Q
Set the desired water temperature via the auxiliary boiler
controller to maximum 55°C.
Q
Install an aquastat valve in the return water flow of the
heat pump.
Q
Set the aquastat valve to close above 55°C and to open
below 55°C.
Q
Install non-return valves.
Q
Make sure to only have one expansion vessel in the water
circuit. An expansion vessel is already is already premounted in
the indoor unit.
Q
Install the digital I/O PCB (option EKRP1HB).
Q
Connect X1 and X2 (changeover to external heat source) on the
PCB to the auxiliary boiler thermostat.
Q
To setup the heat emitters, see setting up the space
heating/cooling application guidelines).
Configuration
Via the user interface (quick wizard):
Q
Set the use of a bivalent system as external heat source.
Q
Set the bivalent temperature and hysteresis.
Changeover to external heat source decided by an auxiliary
contact
Q
Only possible in external room thermostat control AND one
leaving water temperature zone (see setting up space
heating/cooling application guideline).
Q
The auxiliary contact can be:
Q
An outdoor temperature thermostat
Q
An electricity tariff contact
Q
A manually operated contact
Q
…
Q
Setup: Connect the following field wiring:
INFORMATION
Q
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.
Q
During heating operation of the auxiliary boiler, the
auxiliary boiler operates to achieve the desired water
temperature set via the auxiliary boiler controller.
a
Outdoor unit
b
Indoor unit
c
Heat exchanger
d
Backup heater
e
Pump
f
Shut-off valve
g
Motorised 3-way valve (delivered with DHW tank)(field
supply)
h
Non-return valve
i
Shut-off valve
j
Collector (field supply)
k
Auxiliary boiler (field supply)
l
Aquastat valve (field supply)
m
DHW tank (option)
n
Heat exchanger coil
FHL1...3
Under floor heating
NOTICE
Q
Make sure the auxiliary boiler and its integration in the
system complies with applicable legislation.
Q
Daikin is NOT responsible for incorrect or unsafe
situations in the auxiliary boiler system.
a
b c
d e
f
g
h
j
FHL1
FHL2
FHL3
M
h
i
i
l
k
f
m
n
NOTICE
Q
Make sure the bivalent hysteresis has enough
differential to prevent frequent changeover between
indoor unit and auxiliary boiler.
Q
Because the outdoor temperature is measured by the
outdoor unit air thermistor, install the outdoor unit in
the shadow so that it is NOT influenced or turned
ON/OFF by direct sunlight.
Q
Frequent changeover may cause corrosion of the
auxiliary boiler. Contact the manufacturer of the
auxiliary boiler for more information.
B
TI
Boiler thermostat input
A
Auxiliary contact (normal closed)
H
Heating demand room thermostat (optional)
K1A
Auxiliary relay for activation of indoor unit (field supply)
K2A
Auxiliary relay for activation of boiler (field supply)
Indoor
Indoor unit
Auto
Automatic
Boiler
Boiler
NOTICE
Q
Make sure the auxiliary contact has enough differential
or time delay to prevent frequent changeover between
indoor unit and auxiliary boiler.
Q
If the auxiliary contact is an outdoor temperature
thermostat, install the thermostat in the shadow so that
it is NOT influenced or turned ON/OFF by direct
sunlight.
Q
Frequent changeover may cause corrosion of the
auxiliary boiler. Contact the manufacturer of the
auxiliary boiler for more information.
L
N
H
Com
A
K2A
K1A
X2M
BTI
K2A
K1A
Indoor/Auto/Boiler
1 2 3 4
X Y
Indoor
