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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. There is NO WARRANTY for the dry firing of the
electric heating unit.
Ensure the water heater has been in the installed position for a minimum of 30 minutes before switching on
"To Fill and Turn On The Water Heater"
the electricity supply to the water heater. Refer to
on page 41.
MEGGER READING
When a megger test is conducted on this water heater, then the following should be noted.
Warning: This water heater contains electronic equipment and 500 V insulation tests must only be
conducted between active and earth and between neutral and earth. An active to neutral test WILL damage
the electronics.
An insulation test result of greater than 1 MΩ for this water heater is normal.
ELECTRICAL CONNECTION
All electrical work and permanent wiring must be carried out by a qualified person and in accordance with the
edition of the Wiring Rules AS/NZS 3000 in force in the state or territory at the time of installation, and all
local codes and regulatory authority requirements.
The water heater must be directly connected to a 220 V - 240 V a.c. 50 Hz mains power supply. The water
heater must be on its own circuit with an isolating switch installed at the switchboard. The Wiring Rules
requires a second and lockable isolating switch be installed adjacent to but not on or attached to the water
heater. In Australia, a residual current device (RCD) must be installed in the electrical circuit to the water
heater.
The electrical power supply cable from the switch board to the isolation switch adjacent to the water heater
must be correctly sized to safely carry the maximum current draw of the heat pump and electric heating unit
operating together on the water heater. The power supply must be able to supply a minimum of 17 Amps.
This water heater is fitted with a 2.5 m supply cord and bootlace wire terminals and must be directly
connected to the mains electricity supply with an Earth, Live and Neutral wire connection. This supply cord
can be connected to the isolating switch adjacent to the water heater. A flexible 20 mm conduit is required for
the electrical cable to the water heater. The conduit is to be secured to the unit at the lower front cover with
the cable clamp supplied.
Note: It is not recommended to connect this water heater via a power switching device which allows
alternative supply of grid power and photovoltaic (PV) power.
The water heater is recommended for connection to a 24 hour continuous tariff power supply. Depending
upon the size of the household and its hot water requirements and if the Electricity Retailer permits, an
extended off-peak (overnight and day) or Extended time controlled power supply connection of a minimum
16 hours per day may also be suitable.
The water heater will only operate on a sine wave at 50 Hz. Devices generating a square wave cannot be
used to supply power to the water heater.
ELECTRIC HEATING UNIT AND THERMOSTAT SETTING
The water heater has an electric heating unit and thermostat and is controlled by the electronic controller.
The electric heating unit will be automatically activated during periods when the ambient air temperature falls
below -7°C or above 43°C and heating of the water is required. In addition, if the heat pump operates
between -7°C and 7°C for longer than 3 hours 20 minutes, the electric heating unit will turn on to assist in the
heating of the water.
The Hot Water Temperature Set Point of the heat pump and the electric heating unit can be adjusted from
"Hot Water Temperature Set Point"
60°C to 70°C. Refer to
on page 17.
39
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