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a
Safety device (pressure and temperature relief valve of
domestic hot water tank; pressure relief valve of domestic
hot water tank kit)
b
Tundish
c
Fixed grating
d
Trapped gully
D1
Metal discharge pipe from safety device to tundish
D2
Discharge pipe from tundish, with continuous fall. See
Building Regulation G3 section 3.56, Table 03 and
worked example.
10 After completing the installation, the installer has to fill out the
warning label on the tank with indelible ink. The warning label
can be found on the unit top plate.
WARNING
The discharge pipes from the pressure relief valves MUST
terminate in a safe and visible position without forming any
risk to persons in the vicinity.
WARNING
▪ Discharge piping, tundish, drain valves, etc. MUST be
positioned away from any electrical components.
▪ The discharge pipe away from the tundish MUST
terminate in a safe, visible position without forming any
risk to persons in the vicinity.
WARNING
▪ Do NOT install any valves between the domestic hot
water tank and relief valves/expansion vessel.
▪ Do NOT install shut-off valves between the expansion
relief valve and the domestic hot water tank.
NOTICE
▪ All pipework and fittings must be flushed free of flux
and debris prior to installing the domestic hot water
tank kit. Failure to do this may cause irreparable
damage to the tank kit controls. Flush the system by
opening the hot water tap.
▪ The tundish pipework must be a 22 mm metal pipe with
a minimal vertical length of 300 mm below the tundish
before any elbows or bends in the pipework. All
pipework must have a continuous fall of 1 in 200
thereafter. Maximum permitted (equivalent) length of
22 mm pipework is 9 m. Each bend or elbow is
equivalent to 0.8 m of pipework.
ETVH16SU18+23E
Daikin Altherma 3 H HT F
4P644729-1E – 2023.10
5.2.3
To connect the recirculation piping
Prerequisite: Only required if you need recirculation in your system.
1 Remove the top panel from the unit, see
unit" [ 4 6].
indoor
2 Cut out the rubber grommet on top of the unit, and remove the
stop. The recirculation connector is placed below the hole.
3 Route the recirculation piping through the grommet and connect
it to the recirculation connector.
4 Reattach the top panel.
5.2.4
To fill the water circuit
To fill the water circuit, use a field supply filling kit. Make sure you
comply with the applicable legislation.
NOTICE
Make sure both air purge valves (one on the magnetic filter
and one on the backup heater) are open.
All automatic air purge valves MUST remain open after
commissioning.
5.2.5
To protect the water circuit against
freezing
About freeze protection
Frost can damage the system. To prevent the hydraulic components
from freezing, the software is equipped with special frost protection
functions such as water pipe freeze prevention and drain prevention
(see the installer reference guide) that include the activation of pump
in case of low temperatures.
However, in case of a power failure, these functions cannot
guarantee protection.
Do one of the following to protect the water circuit against freezing:
▪ Add glycol to the water. Glycol lowers the freezing point of the
water.
▪ Install freeze protection valves. Freeze protection valves drain the
water from the system before it can freeze. Insulate the freeze
protection valves in a similar way as the water piping, but do NOT
insulate the inlet and outlet (release) of these valves.
NOTICE
If you add glycol to the water, do NOT install freeze
protection valves. Possible consequence: Glycol leaking
out of the freeze protection valves.
5 Piping installation
"4.2.1 To open the
Installation manual
11
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