41
CONNECTIONS
–
ELECTRICAL
The power supply to the water heater must not be switched on until the solar storage tank is filled
with water.
MEGGER READING
It is not mandatory to conduct a megger test on a plug in appliance, however if 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 either active and earth or neutral and earth. An active to neutral test WILL damage the
electronics.
An insulation test result of approximately 660
KΩ
for this water heater is normal.
Typically the insulation resistance between live and earthed parts of an electrical installation should not be
less than 1 MΩ. However AS/NZS 3000:2000 clause 6.3.3.3.2 „Results‟ states:
“The value of 1 MΩ may be reduced to:
0.01 MΩ for sheathed heating elements or appliances; or
a value permitted in the Standard applicable to electrical equipment.”
This model water heater is categorised as a „stationary class 1 motor operated appliance‟ and has been
tested to AS/NZS 3350.1:2002 clause 16 „Leakage current and electric strength‟ and has passed the
requirements of this Standard. Therefore, this model water heater complies with the condition stated in
AS/NZS 3000:2000 clause 6.3.3.3.2 (b).
ELECTRICAL CONNECTION
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.
Warning:
Temperature controllers
must not
be fitted to an in-series gas booster as part of solar water
heater system because water at a temperature much higher than the controller setting can be delivered.
The solar storage tank and gas booster both require a 240 V AC, 50 Hz mains power supply for operation.
The solar storage tank and gas booster are both supplied with a 1.8 metre power cord and each require their
own switched general purpose outlet (GPO) to be located within 1.2 metres of the installation. Two GPOs are
required and each GPO must have a continuous power supply. The GPOs are required to be weatherproof if
installed outdoors.
The power consumption of the water heater is:
Component
Power
consumption
Comments
Solar controller
3 Watts
Constant load
Solar pump
165 Watts
Maximum load at solar heating cycle start up
(for approximately two (2) minutes)
50 Watts
Average load during the solar heating cycle
Gas booster
80 Watts
Burner on, anti frost device inactive
175 Watts
Burner on, anti frost device active
The solar storage tank and gas booster 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.
