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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.

Note: AS 3498 requires that a water heater provides the means to inhibit the growth of Legionella bacteria in

potable water. This water heater can satisfy this AS 3498 requirement provided it is energised and the

thermostat setting is 60°C or higher, including when it is used as an in-series booster water heater for a solar

water heater.

WATER HEATER

The water heater must be directly connected to either a 240V AC 50 Hz mains power supply or a 3 phase,

415 Volt AC star supply with one heating unit per phase for models with 3 heating units and two heating units

per phase for models with 6 heating units. An isolating switch must be installed at the switchboard.

A 25 mm flexible conduit is required for the electrical cable to the water heater. The conduit is to be

connected to the unit with a 25 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 should suit this application.

The power rating of the heating units is shown on the rating label of the water heater and are rated for a

240 Volt power supply.

Note: The water heater is not suitable for power supplies utilising a 415 V delta connected supply.

THERMOSTAT SETTING

The thermostats are adjustable from 60°C to 82°C. The thermostat is adjusted by turning the adjuster

anticlockwise to decrease the temperature setting and clockwise to increase the temperature setting. Only

adjust the temperature setting when the isolating switch is switched off at the switchboard.

The maximum recommended thermostat settings are 75°C – 613050, 77°C – 613315, 82°C – 616315.

If this water heater is installed as an in-series booster water heater as part of a commercial solar water

heating system:

the solar control system must be of a design to limit solar contribution so the water temperature in the

solar preheat tank(s) does not exceed 80°C. This is necessary to ensure the solar input does not cause

the thermostat’s over-temperature cut-out to operate.

we recommend the thermostats are set at 60°C to maximise solar contribution, unless sanitising

temperatures are required.

For reasons of safety and economy, we advise the thermostat is set at the lowest temperature that will

provide sufficient hot water. Discuss the thermostat setting requirements with a responsible officer.

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