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CONNECTIONS - ELECTRICAL
The electrical installation must be completed in accordance with AS/NZS 3000. All water heaters are
designed for 230 VAC, 50 Hz mains operation and a means of disconnection from the power supply
must be incorporated in the fixed wiring during installation.
A flexible 20 mm conduit is required for the electrical cable to the water heater. The conduit is to be
connected to the unit with a 20 mm plain to screw adaptor. Connect the power supply wires directly to
the terminal block and earth tab connection, ensuring there are no excess wire loops inside the front
cover. For details, refer to the wiring diagram on the inside of the element cover. A separate heating
element earth wire is not required because the element earths by the flange being in contact
with the element socket.
ELEMENT WIRING
All 325 model series are pre-wired for standard installations where the bottom element only is
connected to the mains supply. For alternative energy configurations that require a smaller hot water
boost volume, the upper element may be connected instead. The upper element is not factory fitted.
For alternative energy installations the following element kitsets are available:
# 318243
Kitset Element Solar / HP Sickle 3.0 kW
325250xx-x; 325300xx-x
CONNECTIONS – ALTERNATIVE ENERGY
SOURCES
TEMPERATURE SENSOR TUBE
Some models include receptacle tubes for temperature sensors used in alternative energy source
water heater products that may be connected to this cylinder. Ensure that any additional sensor wiring
is routed away from mains wiring and in accordance with the instructions provided by the
manufacturer.
TEMPERATURE CONTROL DEVICES AND SETTINGS
The temperature of water heated by alternative / supplementary energy sources connected either
directly or indirectly (through coils) is controlled exclusively by that energy source (e.g. Heat Pump
Water Heater or Solar Water Heater). The temperature of water heated by these sources must not
exceed 85ºC to prevent activation of the over-temperature cut out of the supplied thermostat.
Warning: The connection of any alternative energy source to this water heater could create a
dangerous situation and may jeopardise the water heater warranty. Water heater system design
must be carried out by licensed competent persons. For further advice contact Rheem. For
uncontrolled heat source, such as wetback heaters or some solar systems, the water heater must
be open vented.
COMMISSIONING
TO FILL AND TURN ON THE WATER HEATER
Warning: The power supply to the water heater must not be switched on until the water
heater is filled with water and an “Earth Continuity Test”, as outlined in Annex A of AS/NZS
60335.1, has been carried out. Failure to do so will damage the element and shorten its life
and may create a dangerous situation.
Open all of the hot water taps in the house (don't forget the shower). Open the cold water isolation
valve fully to the water heater to force the air out of the taps. As water flows freely from each tap,
close it. Check the pipe-work for leaks.
Switch on the electrical supply at the isolating switch to the water heater.
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