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35
CONNECTIONS – ELECTRICAL
The power supply to the water heater must not be switched on until the
water heater is filled with water and a satisfactory megger reading is
obtained.
All electrical work and permanent wiring must be carried out by a qualified
person and in accordance with the Wiring Rules AS/NZS 3000 and all local
codes and regulatory authority requirements.
WATER HEATER
A water heater not fitted with a supply cord and plug must be directly connected
to a 240 V AC, 50 Hz mains power supply with an isolating switch installed at
the switchboard.
The power supply to a twin element model should be Off-Peak (overnight) to
the bottom heating unit and continuous to the top heating unit. The power
supply to a single element model can be either an Off-Peak (overnight),
Extended Off-Peak (overnight and day) or continuous electricity supply,
depending upon the size of the water heater. Check with the local electricity
supply authority as to their requirements. An Off-Peak (overnight) power supply
will provide the maximum financial savings. Discuss the power supply
requirements with the householder.
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 terminator. 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. The temperature
rating of the power supply wires insulation must suit this application.
A water heater fitted with a supply cord and plug must be plugged into a
switched 240 V AC, 50 Hz mains power outlet rated at 10 A.
THERMOSTAT SETTING
The thermostat is adjustable from 60°C to 70°C (60°C to 75°C on 050 models).
The thermostat is adjusted by turning the adjuster anticlockwise to decrease
the temperature setting and clockwise to increase the temperature setting. Only
adjust the thermostat setting when the isolating switch is switched off at the
switchboard. The top thermostat on a twin element model is fixed at 60°C.
For reasons of safety and economy, we advise the thermostat be set at the
lowest temperature that will provide sufficient hot water. Dishwasher running
costs can be adversely affected if the thermostat is set below 65°C. Discuss
the thermostat setting requirements with the householder.
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