Specifications

46
CONNECTIONS – ELECTRICAL
The power supply to the water heater must not be switched on until the water heater is filled with
water.
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.
The power consumption of the water heater is:
Component
Power
consumption
Comments
Solar controls
4 Watts
Constant load - differential controller
Solar circulator
36 Watts
Maximum circulator load at solar heating cycle or
anti-freeze cycle start up
30 Watts
Average circulator load during the solar heating cycle
or anti-freeze cycle
Heating unit
1200 Watts
Heating unit load when operating
Total
1240 Watts
Maximum load during anti-freeze cycle
1234 Watts
Average load during anti-freeze cycle
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.
SOLAR CONTROL UNIT
The solar control unit, supplied with a 1.8 metre power cord, requires a switched 240 V AC 50 Hz general
purpose outlet (GPO) to be located within 1.2 metres of the installation. The GPO must have a continuous
power supply originating from a circuit other than the water heater circuit. The GPO is required to be
weatherproof if installed outdoors.
The anti-freeze heating unit is supplied with power from the power outlet via the solar control unit. A flexible
20 mm conduit is provided for the electrical cable from the solar control unit to the solar storage tank. The
conduit is connected to the solar control unit and the solar storage tank with 20 mm terminators.
The power outlet to the solar storage tank must be switched on for the solar control unit to operate and solar
gain to be achieved and for the anti-freeze heating unit to operate and offer additional freeze protection.
The anti-freeze heating unit is rated at 1200 watts.
Warning: If at any stage the heating unit requires replacement, the replacement heating unit‟s rating
must not exceed 1200 watts. Fitting a heating unit with a power rating greater than 1200 watts will damage
the differential controller in the solar control unit.
The solar control unit automatically controls the flow rate through the collector circuit. This is achieved via the
hot and cold sensors and differential controller programming providing control over the operation of the
circulator. There is no provision for nor is adjustment to the solar control unit required.
THERMOSTAT SETTING
The temperature setting on the thermostat connected to the anti-freeze heating unit does not need to be
adjusted as this thermostat does not provide temperature control. Its primary function is to provide an energy
cut-out in the event the solar controller fails to turn off power to the anti-freeze heating unit. Temperature
control for the freeze protection function is provided by the differential controller in the solar control unit.