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 the in-series booster as part of a solar water heater system because water at a temperature much higher than the controller setting can be delivered.

The water heater requires a 240 V AC, 50 Hz mains power supply for operation. The solar storage tank, supplied with a 1.8 metre power cord to operate the solar controls requires a switched general purpose outlet

(GPO) to be located within 1.2 metres of the installation. The GPO must have a continuous power supply.

The GPO is 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

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.

33

CONNECTIONS – ELECTRICAL

HOT SENSOR LEAD

House the hot sensor lead at the water heater in the flexible conduit provided and secure the conduit in the cut out on the tab located behind the upper front cover. Connect the hot sensor cable to the hot sensor cable connector located on the tab behind the upper front cover. Secure the hot sensor lead to the water heater jacket to prevent possible damage.

AUXILIARY PUMP

The auxiliary pump, if installed, must be wired to the control board. Refer to “Auxiliary Pump – Electrical

Connection” on page 37.

WIRING DIAGRAM

Wiring Diagram

Solar Drain Back Integrated Gas Boost (27L) & Storage Tank

34