BOOSTER CONTROL
The isolating switch installed in the electrical meter box for the solar storage tank should be left switched on.
Leaving the isolating switch switched on will also provide a sufficient period of time each day for the booster
heating unit to operate, if required, to satisfy the requirements of AS 3498.
Timer Control Switch
A suitably rated timer control switch can be installed and will help maximise energy savings with an electrically
boosted solar water heater connected to a continuous, time of use or extended Off-Peak (overnight and
day) electricity supply.
If used with an extended Off-Peak (overnight and day) electricity supply, the timer switch should:
be operated by a continuous power supply on its own circuit from the switchboard with the booster heating
unit operated by the Off-Peak power supply. A double pole isolating switch is required to be installed at
the switchboard to simultaneously isolate both circuits.
or
be of a type which has an internal rechargeable battery to keep time when the power supply is not available
to the timer.
"Booster Control"
Refer to
WIRING DIAGRAM – TIMER CONTROL SWITCH
Switchboard
CONTINUOUS
POWER SUPPLY
Timer
TIMER WITHOUT CONTACTOR
ELECTRIC BOOSTED DIRECT SOLAR WATER HEATER
on page 8 for information on programming the timer.
Switchboard
EXTENDED OFF-PEAK
POWER SUPPLY
Terminal Block
TIMER WIRING DIAGRAMS
EXTENDED OFF-PEAK
(timer with rechargeable battery)
Timer
TIMER WITH CONTACTOR (if required)
45
CONNECTIONS – ELECTRICAL
Switchboard
POWER SUPPLY
Terminal Block