8
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Piping installation
Installer reference guide
96
EPRA14~18D + ETV23E
Daikin Altherma 3 H HT F
4P644738-1A – 2022.03
1
2
3
Fit the T-piece (part of the kit) to the domestic hot water cold water IN pipe of
the unit.
4
Connect the pressure reducing valve/pressure relief valve combination (part
of the kit) to the T-piece with a length of copper tube Ø22 mm (field supply).
5
Connect the expansion vessel to the T-piece with a length of copper tube
Ø22 mm (field supply).
6
Connect the pressure reducing valve/pressure relief valve combination to the
water mains inlet.
7
Install the tundish (part of the kit) in a vertical position within a maximum of
600 mm away from the pressure reducing valve/pressure relief valve
combination.
WARNING
Install the tundish away from any electrical device.
Possible consequence:
Electrical
shock or fire.
NOTICE
To ensure a free water flow through the discharge pipe, manually operate the
pressure relief valve by turning its knob left.
8
Using the accessory brass compression coupler (see
accessories from the domestic hot water tank kit"
27]), connect the
accessory pipe (see
"4.2.2 To remove the accessories from the indoor
26]) to the pipe connection located at the back of the unit. This pipe
starts at the pressure relief valve of the domestic hot water tank.
9
Connect the 2 tundishes (1 from the pressure relief valve of the domestic hot
water tank, and 1 from the pressure relief valve of the domestic hot water
tank kit) to an appropriate drain according to the applicable legislation. The
following example shows discharge below fixed grating (Building Regulation
G3 section 3.61 gives alternative points of discharge):
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