W W W . S O L A R P O W E R . N E T . A U
Page 10 of 20
Revision: 9h Issued: 01 August 2008
PIPE SIZES
The “Solar Cold” and “Solar Hot” pipes between the solar storage tank and the solar collectors should
be DN15
Copper Pipe Only
. The cold water pipe to the water heater should be the same size or larger
than the hot water line from the water heater. For best results, choose the most suitable pipe size for
each individual application. Refer to the relevant plumbing regulations.
DO NOT USE PLASTIC PIPE WORK BETWEEN COLLECTORS AND TANK.
NOTE:
The “Solar Cold” and “Solar Hot” pipes between the solar storage tank and the solar
collectors
must be
of copper and fully insulated with Bradflex / Armaflex insulation or similar
(minimum thickness 13 mm). Plastic pipe
must not
be used, as it will not withstand the temperature
of the water generated by the solar collectors under certain conditions.
OVERFLOW OUTLET PIPE
A drain pipe should be fitted to the overflow outlet to carry the discharge clear of the water heater.
Connect the drain line to the overflow outlet using a compression union or similar –
never
braze/solder
to any fittings on the water heater. The pipe work from the overflow outlet to the drain should be as
short as possible, and fall all the way from the water heater with no restrictions. The outlet of the drain
pipe must be in such a position that flow out of the pipe can be easily seen, but arranged so hot water
discharge will not cause injury, damage or nuisance.
SAFETY WARNING:
As the function of the overflow outlet pipe is to discharge high
temperature water under certain conditions, it is strongly recommended the pipe work downstream of
the relief valve be capable of carrying water exceeding 95ºC. Failure to observe this precaution may
result in damage to pipe work and property. Should this pipe become obstructed (eg. squashed, kinked
or blocked), then the water heater may be damaged due to internal pressure.
4.
CONNECTIONS – ELECTRICAL
NOTE:
Power must not be turned on until the solar storage tank is filled with water, and electrical
circuits are found to be satisfactory. The water heater is designed for a 20 Amp 240 V 50Hz power
supply.
1.
Booster Element Power
The solar storage tank with an electric booster element is designed for connection to a 240V AC mains
power supply with an isolating switch installed at the switchboard. A 20 mm flexible conduit is
required to protect the cable entering the tank. The conduit is to be connected to the unit with a 20 mm
gland. There is a wiring diagram inside the upper electrical cover, showing how to connect power to
the booster element and thermostat components.
BOOSTER ELEMENT WIRING
The system is designed to operate most cost efficiently on the continuos tariff. Other forms of
Electrical connections may result in unintended operation of the system.
A.
STANDARD WIRING CONFIGURATION
Electrical installation of the solar storage tank with circuit breaker only. Recommended for all
installations and is the factory default wiring as supplied.
2.
Roof Sensor Connection
The roof sensor cable is to be installed along with the solar pipe work and is connected to the
controller board located in the storage tank. The sensor cable is run through the cable gland in the
staorage tank case and secured with a cable tie to provide cable strain relief and then connected to the
terminals on the solar controller circuit board marked “Collect.” Polarity of the sensor is not important.
