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7
Installation
Installer reference guide
33
ERLQ004~008CA + 08S18CA3VF
Daikin Altherma low temperature split
4P3662261 – 2014.01
7.5
Connecting the water piping
7.5.1
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.
To facilitate service and maintenance, 2 shutoff valves are provided.
Mount the valves on the water inlet and on the water outlet. Mind
their the position. Orientation of the integrated drain and fill valves is
important for servicing.
1
Install the shutoff valves on the water pipes.
a c
b
d
a
Space heating water out
b
Space heating water in
c
Domestic hot water out
d
Domestic cold water in (cold water supply)
NOTICE
It is recommended to install shutoff valves to domestic
cold water in and domestic hot water out connections.
Shutoff valves are field supplied.
NOTICE
To avoid damage to the surroundings in case of water
leakage, it is recommended to close the cold water inlet
stop valves during periods of absence.
2
Screw the indoor unit nuts on the shutoff valves.
3
Connect the domestic hot water in and out pipes to the indoor
unit.
NOTICE
▪ A drain device and pressure relief device should be
installed on the cold water inlet connection of the
domestic hot water cylinder.
▪ To avoid back siphonage, it is recommended to install a
nonreturn valve on the water inlet of the domestic hot
water tank in accordance with the applicable legislation.
▪ It is recommended to install a pressure reducing valve
on the cold water inlet in accordance with the
applicable legislation.
▪ An expansion vessel should be installed on the cold
water inlet in accordance with the applicable legislation.
▪ It is recommended to install the pressure relief valve on
higher position as top of the domestic hot water tank.
Heating of the domestic hot water tank causes water to
expand and without pressure relief valve the water
pressure inside the tank can rise above the tank design
pressure. Also the field installation (piping, tapping
points, etc.) connected to the tank is subjected to this
high pressure. To prevent this, a pressure relieve valve
needs to be installed. The overpressure prevention
depends on the correct operation of the field installed
pressure relief valve. If this is NOT working correctly,
overpressure will deform the tank and water leakage
may occur. To confirm good operation, regular
maintenance is required.
7.5.2
To connect the pressure relief valve to the
drain
The blow out of the pressure relief valve is coming out of the
backside of the unit.
a
a
Pressure relief blowout
The blow out should be connected to an appropriate drain according
to the applicable legislation. It is recommended to use a tundish.
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