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HOW YOUR WATER HEATER WORKS
The Solahart Streamline open circuit system has its vitreous enamel lined solar storage tank installed at
ground or floor level, remotely from the solar collectors. As the sun heats the water in the solar
collectors the increase in temperature activates the circulator. The circulator then moves the water from
the solar collectors through an insulated copper pipe to the solar storage tank. The circulator switches
on whenever the water in the solar collectors is hotter than the water in the tank. Cooler water from the
solar storage tank is circulated to the solar collectors to be heated by the sun’s energy. This process
continues while solar energy is available and until the water in the solar storage tank reaches a
temperature of approximately 70°C. Automatic safety controls are fitted to the water heater to provide
safe and efficient operation.
MAINS PRESSURE
The water heater is designed to operate at mains pressure by connecting directly to the mains water
supply. If the mains supply pressure in your area exceeds that
shown on page 18, a pressure limiting
valve must be fitted. The supply pressure should be greater than 350 kPa for true mains pressure
operation to be achieved. A minimum water supply pressure of 200 kPa is required to enable the solar
circulator and solar circuit system to operate effectively.
ELECTRIC BOOSTING
Water stored in the solar storage tank can be heated by an
electric booster heating unit. The booster heating unit is for
heating the water at times of low solar energy gain, such as
during very cloudy or rainy weather, or during the winter
months. The Streamline water heater is suitable for the
heating unit to be connected to an Off-Peak electricity
supply, but can be connected to an extended Off-Peak or
continuous electricity supply.
The booster heating unit is controlled by an electric
thermostat. The thermostat and its over temperature energy
cut out are mounted on the solar storage tank behind the
front cover. The water temperature is automatically
controlled to the thermostat setting when the booster heating
unit is energised.
MANUAL CONTROLS
An isolating switch is installed in your electrical meter box for
your solar storage tank. Solahart recommends an additional
manual isolating switch be installed in the power supply
circuit to the solar storage tank. This booster switch should
be installed in a convenient location such as the kitchen or
laundry and will enable control of the electrical boosting
during periods of poor solar gain.
A suitably rated single-pole
on / off switch should be used to control a booster heating unit connected to
an Off-Peak electricity supply. A booster heating unit connected to a continuous electricity supply
should be controlled by either a suitably rated single pole on / off switch or
“One Shot Control” switch.
The amount of water heated by the raised booster heating unit of your Streamline storage tank will be
285 litres (430 model), 200 litres (340 model) or 160 litres (270 model).