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ABOUT YOUR WATER HEATER
7
SINGLE ELEMENT MODEL
This type of water heater has one heating unit
with its own thermostat. The heating unit is at
the base of the water heater.
Continuous electricity supply
This type of connection is suited to where
the storage capacity is less than the
normal daily usage.
Off-Peak electricity supply
This type of connection will only allow
heating to occur during set hours. A
volume of water sufficient for the day’s
total use is heated and stored. This type of
heating will be more economical due to
reduced tariffs by the electricity authority.
TWIN ELEMENT MODEL
This type of water heater has two heating units, each with its own thermostat.
One heating unit is at the base of the water heater and the other near the top.
Bottom heating unit
During normal operation this heating unit
supplies all the hot water.
Top heating unit (Booster)
This heating unit only operates during
periods of high demand to provide an
additional supply of heated water.
Electrical connection
The two heating units are wired for non-
simultaneous operation, so that only one
heating unit can operate at a time. The
bottom heating unit is usually connected to
an Off-Peak (overnight) or time controlled
electricity supply and the top heating unit
to a continuous supply. Some electricity
suppliers allow both heating units to be
metered at the Off-Peak or controlled tariff.
NOTE: Power must be available to the top heating unit circuit at all times
for this water heater to operate as designed.
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