Thermann 25THMS124P, Installer Manual

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4
Thermann Installer’s Manual
25L & 50L Electric Storage Water Heaters
PLUMBING CONNECTIONS
Relief Valve:
The Pressure & Temperature Relief (PTR)
Valve, along with a brass reducer, is
supplied loose with the water heater.
The PTR Valve rating is 1,000 kPa.
The PTR Valve rating is also shown on
the compliance plate. The PTR Valve
must be installed with the brass reducer
directly into either of the RP
¾
”(DN20)
sockets marked “RELIEF VALVE”. Ensure
that a sealing material is applied to the
PTR Valve and the brass reducer to
prevent water leaks.
The unused socket marked “RELIEF
VALVE” is to be plugged with one of the
brass plugs supplied loose with the water
heater. Ensure that a sealing material
is applied to the brass plug to prevent
water leaks.
The drain line from the PTR Valve
must be made of copper and run in
accordance with the requirements of
AS/NZS 3500.4. It must be installed in
a continuously downward direction in a
frost free environment.
The PTR Valve and its drain line must
not be sealed or blocked. Generally a
separate drain line must be run for the
valve although it may be joined with the
drain line from the expansion control
valve under certain circumstances.
Care must be taken when attaching
pipe saddles to the water heater.
Self-drilling screws no longer than 12 are
recommended.
It is normal for the valve to leak a small
amount of water during heating cycles.
The PTR Valve is not intended to enable
connection of the water heater to
supplementary energy sources such as
solar panels or slow combustion stoves.
Refer to AS/NZS 3500.4 for guidance on
these types of installations.
Hot Water Connection:
The hot water pipe is to be connected to
either of the RP ¾ ”(DN20) sockets with
red surrounds at the top of the water
heater.
The unused socket with red surrounds
is to be plugged with one of the brass
plugs supplied loose with the water
heater. Ensure that a sealing material
is applied to the brass plug to prevent
water leaks.
It is recommended that all hot water
pipes are insulated. Hot water pipes
installed outdoors should be insulated
with UV stabilised insulation.
Plastic pipes or fittings shall not be used
within 1 metre of the outlet although
they may be used downstream of a
temperature control valve. Refer to
AS/NZS 3500.4 for further details.
Temperature Protection:
Water heaters can produce very hot
water. To reduce the risk of scald injury,
it is mandatory under the requirements
of AS/NZS 3500.4 that an approved
temperature control device is fitted to
the hot water supply to outlets used
primarily for personal hygiene. This
device should be checked at regular
intervals to ensure its operation and
settings remain correct.