Rheem Solar Hiline 52D180 Owner's Manual And Installation Instructions page 46

CONNECTIONS – ELECTRICAL
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
TIMER CONTROL SWITCH WIRING DIAGRAM
Switchboard
CONTINUOUS
POWER SUPPLY
Timer
TIMER WITHOUT CONTACTOR
ELECTRIC BOOSTED DIRECT SOLAR WATER HEATER
on page 7 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)
46
Switchboard
POWER SUPPLY
Terminal Block