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HOW YOUR WATER HEATER WORKS
11
SINGLE ELEMENT MODELS
· 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
boosting to occur during set hours. A
volume of water sufficient for the day’s
total use is heated and stored. This
type of boosting may be more
economical due to reduced tariffs by
the electricity authority.
TWIN ELEMENT MODELS
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.
· Lower heating unit
During normal operation this heating
unit supplies all of the boosted hot
water during periods of low solar
energy gain.
· Top heating unit
This heating unit only operates during
periods of high demand to provide an
additional supply of boosted water.
· Electrical connection
The two heating units are wired for non
simultaneous operation and only one
heating unit can operate at a time. The
lower heating unit is usually connected
to the Off-Peak 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.