Thermann 25THMS124P, Installer Manual

Page: 7 / 12

5
PLUMBING CONNECTIONS
Water Supply:
This water heater has been manufactured
to suit the water conditions of most
Australian metropolitan supplies.
Please note certain water supplies can
have a detrimental effect on the water
heater and its life expectancy. If you are
unsure about the water supply you can
obtain information from the local water
supply authority.
The water heater is designed for use in
areas where the Total Dissolved Solids
(TDS) content of the water supply is
less than 2500 mg/L. The Tank Failure
Warranty (see Owner’s Guide) does not
apply in areas where the TDS exceeds
2500 mg/L.
In areas where the TDS exceeds
600mg/L, it is possible the magnesium
alloy anode (supplied in standard water
heaters) may become over-reactive. To
alleviate this, the magnesium alloy anode
should be replaced with an aluminium
alloy anode. Aluminium alloy anodes are
available from your local Reece branch.
Water can also be very corrosive, the
measure of this is the saturation index. If
the water saturation index is greater than
0.40, an expansion control valve should
be fitted. If the index is greater than 0.80,
the electrical heating element should
be replaced with a low power density
Incoloy heating element. Please consult
Customer Service on 1300 412 612 for
advice if required.
Cold Water Connection:
The water heater is intended to be
permanently connected to the water
supply main, and not connected by a
hose-set.
An approved isolating valve, non-return
valve, line strainer (optional but
recommended) and union must be fitted
between the water supply main and
either of the RP ¾ ”(DN20) sockets with
blue surrounds at the bottom of the
water heater. See the diagram on page 6
for details.
All fittings must be approved by the
relevant Authority. Plastic pipes or
fittings shall not be used between the
isolating valve and the inlet.
The unused socket with blue 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.
Water Supply Pressure:
This water heater is designed for direct
connection to water supply pressures of
up to 800 kPa .
Where the mains pressure can exceed
or fluctuate beyond this pressure, a
pressure reducing valve must be fitted in
the cold water inlet supply.
Note for New Zealand, South Australia
and Western Australia:
It is a requirement in these locations that
an expansion control valve be fitted on
the cold water supply line between the
non-return valve and the water heater.