Daikin Altherma 3 H HT EPRA14DAW1, Installer'S Reference Manual

Page: 41 / 260

5 | Application guidelines
Installer reference guide
41
EPRA14~W1 + ETVH/9W(G)
Daikin Altherma 3 H HT F
4P587502-1A – 2020.01
A
B
a
e
b
b
c
d
c
A Main leaving water temperature zone
B One single room
a Dedicated Human Comfort Interface (BRC1HHDA used as room thermostat)
b Non-return valve (field supply)
c Shut-off valve (field supply)
d Auxiliary boiler (field supply)
e Aquastat valve (field supply)
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.
▪ 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.
▪ Make sure to only have one expansion vessel in the water circuit. An expansion
vessel is already pre-mounted in the indoor unit.
▪ 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
"8.3.8 To connect the changeover to external heat
source" [
4
111].
▪ To setup the heat emitters, see "5.2 Setting up the space heating/cooling
system" [
4
28].
Configuration
Via the user interface (configuration wizard):
▪ Set the use of a bivalent system as external heat source.
▪ Set the bivalent temperature and hysteresis.
Changeover to external heat source decided by an auxiliary contact
▪ Only possible in external room thermostat control AND one leaving water
temperature zone (see
"5.2 Setting up the space heating/cooling system" [
4
28]).