Daikin ERLA03DAV3, Installer'S Reference Manual, Page: 70 / 192

7 | Piping installation
Installer reference guide
70
ERLA EHFZ03S18DJ3V
Daikin Altherma 3 R F
4P596821-1A – 2020.05
7.6.3 To connect the water piping
NOTICE
Do NOT use excessive force when connecting the piping. Deformation of the piping
can cause malfunctioning of the unit.
NOTICE
This unit is designed for operation on 2 temperature zones:
▪
underfloor heating in the main zone , this is the zone with the lowest water
temperature ,
▪
radiators in the additional zone , this is the zone with the highest water
temperature .
1 Connect the space heating water in and out pipes to the indoor unit.
2 Connect the domestic hot water in and out pipes to the indoor unit.
c d a b
f e
a Space heating additional zone water out
b Space heating additional zone water in
c Domestic hot water out
d Domestic cold water in (cold water supply)
e Space heating main zone water out
f Space heating main zone water in
NOTICE
It is recommended to install shut-off valves on the space heating/cooling water in
and out connections, as well as on the domestic cold water in and domestic hot
water out connections. These shut-off valves are field supplied.
NOTICE
To avoid damage to the surroundings in case of water leakage, it is recommended to
close the domestic cold water inlet shut‑off valves during periods of absence.
NOTICE
Overpressure bypass valve (field supply). We recommend to install an overpressure
bypass valve in the space heating water circuit. Mind the minimum flow rate when
adjusting the overpressure bypass valve setting.