Daikin EAVH16S23DA6V Installer's Reference Manual page 43

EPGA11~16DAV3(7) + EAVH/X16S18+23DA6V(7)+9W(7)
Daikin Altherma 3 H F
4P556070-1A – 2021.09
▪ Make sure the return water to the heat pump does NOT exceed 60°C. To do so:
- Set the desired water temperature via the auxiliary boiler controller to
maximum 60°C.
- Install an aquastat valve in the return water flow of the heat pump. Set the
aquastat valve to close above 60°C and to open below 60°C.
▪ Install non-return valves.
▪ An expansion vessel is already pre-mounted in the indoor unit. But for bivalent
operation, also make sure that there is an expansion vessel in the auxiliary boiler
loop. Otherwise when bivalent operation is running and if the Aquastat valve
would close, there would be no expansion vessel in the water circuit anymore.
▪ Install the digital I/O PCB (option EKRP1HBAA).
▪ Connect X1 and X2 (changeover to external heat source) on the digital I/O PCB to
the auxiliary boiler. See
4
source" [ 96].
▪ To setup the heat emitters, see
4
system" [ 30].
Configuration
Via the user interface (configuration wizard):
▪ Set the use of a bivalent system as external heat source.
▪ Set the bivalent temperature and hysteresis.
▪ Set the operation mode to space heating only (no tank operation).
Changeover to external heat source decided by an auxiliary contact
▪ Only possible in external room thermostat control AND one leaving water
temperature zone (see
▪ The auxiliary contact can be:
- An outdoor temperature thermostat
- An electricity tariff contact
- A manually operated contact
- ...
▪ Setup: Connect the following field wiring:
L
H
Indoor/Auto/Boiler
A
K1A
N
B Boiler thermostat input
TI
A Auxiliary contact (normally 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
"9.3.8 To connect the changeover to external heat
"6.2 Setting up the space heating/cooling
"6.2 Setting up the space heating/cooling
Com
Indoor
X2M
35 30
K1A
K2A
6 Application guidelines
|
system" [
B TI
X Y
K2A
Installer reference guide
4
30]).
43