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THM0421 026512 Rev. C Apr 13
Thermann Owner’s Manual
250L to 400L Electric Storage Water Heaters
Safety
This appliance is not intended for use
by persons (including children) with
reduced physical, sensory or mental
capabilities, or lack of experience
and knowledge, unless they have
been given supervision or instruction
concerning use of the appliance by a
person responsible for their safety.
Children and animals should be
supervised to ensure that they do not
interfere with the appliance.
Filling The Water Heater
Open all hot water taps. Open isolating
valve at the cold water inlet slowly and
allow water heater to fill until water
flows through the system. Close each
hot water tap after the air is expelled
from its line. As noted previously
power is not to be turned on until the
water heater is filled with water.
Water Quality
Your Thermann water heater has been
manufactured to suit water conditions
of most Australian metropolitan
supplies. Please note that harsh water
supplies can have a detrimental
effect on the water heater and its life
expectancy. If you are unsure about
your water quality you can obtain
information from your 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. In areas where
the TDS exceeds 600mg/L
it is possible that the magnesium alloy
anode (supplied in the heater) may
become over-reactive. To alleviate
this, the magnesium alloy anode
should be replaced with an aluminium
alloy anode, 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 water heater installed
should be a Hard Water Model.
Please consult our Customer Service
Department for advice if required.
Caution
If the water heater is left in an
operating condition and unused for
two weeks or more, a quantity of
hydrogen (which is highly flammable)
may accumulate in the top of the
water cylinder. To dissipate this gas
safely it is recommended that a hot
tap be turned on for several minutes
at a sink, basin or bath, but not a
dishwasher, clothes washer or other
appliance. During this procedure
there must be no smoking, open
flame or any other electrical appliance
operating nearby. If hydrogen is
discharged through the tap it will
probably make an unusual sound as
with air escaping.
Where the water heater is not installed
in accordance with the listed advice, the
water heater will not be covered by the
Terms of Warranty.
Operating Instructions
