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5 Piping installation
5.2.5
To insulate the brine piping
The piping in the complete brine circuit MUST be insulated to
prevent reduction of the heating capacity.
Consider that the brine circuit piping inside the house can/will
condensate. Foresee adequate insulation for these pipes.
5.3
Connecting water piping
5.3.1
To connect the water piping
NOTICE
Do NOT use excessive force when connecting the field
piping and make sure the piping is aligned properly.
Deformation of the piping can cause malfunctioning of the
unit.
1 Install the shut off-valve with integrated filter (delivered as
accessory) at the space heating/cooling water inlet.
2 Connect the space heating/cooling IN pipe to the shut-off valve
and the space heating/cooling OUT pipe to the unit.
3 Connect the domestic hot water IN and OUT pipes to the indoor
unit. It is obligatory to use the accessory G3 kit EKUHWG3D to
comply with UK legislation. See
water" [ 4 13].
piping for domestic hot
d
c
b
a
b
a
Space heating/cooling water OUT (Ø22 mm)
b
Space heating/cooling water IN (Ø22 mm) and shut-off
valve with integrated filter (accessory)
c
Domestic hot water: hot water OUT (Ø22 mm)
d
Domestic hot water: cold water IN (Ø22 mm)
NOTICE
It is strongly recommended to install an additional filter on
the heating water circuit. Especially to remove metallic
particles from foul heating piping, it is recommended to use
a magnetic or cyclone filter, which can remove small
particles. Small particles may damage the unit and will
NOT be removed by the standard filter of the heat pump
system.
NOTICE
About the shut-off valve with integrated filter (delivered as
accessory):
▪ The installation of the valve at the water inlet is
mandatory.
▪ Mind the flow direction of the valve.
NOTICE
Expansion vessel. An expansion vessel (field supply)
MUST be installed on the entering piping before the water
pump within 10 m of the unit.
NOTICE
A pressure relief valve (field supply) with an opening
pressure of maximum 10 bar (=1 MPa) must be installed
on the domestic cold water inlet connection in accordance
with the applicable legislation.
Installation manual
12
"5.3.2 To connect the water
NOTICE
▪ A drain device and pressure relief device must be
installed on the cold water inlet connection of the
domestic hot water cylinder.
▪ To avoid back siphonage, it is recommended to install a
non-return valve on the water inlet of the domestic hot
water tank in accordance with the applicable legislation.
Make sure it is NOT between the pressure relief valve
and the DHW tank.
▪ It is recommended to install a pressure reducing valve
on the cold water inlet in accordance with the
applicable legislation.
▪ It is recommended to install an expansion vessel on the
cold water inlet in accordance with the applicable
legislation.
▪ It is recommended to install the pressure relief valve on
a higher position than the 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 relief
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.
NOTICE
▪ It is recommended to install shut-off valves to cold
water IN and hot water OUT connections. Shut-off
valves are field supplied.
▪ However, make sure there is no valve between the
pressure relief valve (field supply) and the DHW
tank.
NOTICE
Install air purge valves at all local high points.
EGSAH/X06+10UD
Daikin Altherma 3 GEO
4P598591-1C – 2023.02
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