Solahart Streamline Owner's Manual page 7

BOOSTER CONTROL
An isolating switch is installed in the electrical meter box for the solar storage tank. This should be left
switched on to allow the booster heating unit to operate if required. 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 colder
months.
The booster heating unit will only activate if heating is required and power is available from the switchboard.
When the water is below the thermostat setting, the booster heating unit will turn on and heat the water. The
booster heating unit will automatically turn off when the temperature of the water reaches the thermostat
setting.
Leaving the isolating switch switched on will also provide a sufficient period of time each day for the booster
heating unit to operate, if required, to satisfy the requirements of AS 3498.
The amount of water heated by the raised booster heating unit of your Streamline indirect closed circuit
storage tank will be 125 litres (270 model).
Timer Control Switch
A suitably rated timer control switch can be installed and will help maximise energy savings with an
electrically boosted solar water heater connected to a continuous, time of use or extended Off-Peak
(overnight and day) electricity supply.
Programming the Timer
Power must be available to the timer control switch before the booster heating unit can be activated.
The timer should be programmed:
to suit the hot water consumption pattern of the household,
with the end of the boost periods to coincide with the commencement of the morning and evening hot
water usage,
to enable each boosting period to be not less than the recommended continuous length of time for
boosting,
for a period when power will be available for the booster heating unit to operate.
Note: When daylight saving time applies, you may consider resetting the timer accordingly.
The recommended continuous length of time for boosting is:
Model
cold water temperature
270 Cool / temperate climate
Temperate / sub tropical climate
Tropical climate
The recommended boosting periods are sufficient to allow the booster heating unit to heat up the boost
volume of the solar storage tank to 60°C where the winter cold water temperatures do not fall below those
shown. This may be necessary during periods of very low solar energy gain through the solar collectors,
such as during constant rain or extremely cloudy weather, particularly in winter when the incoming cold water
temperature is lower. The period will also provide a sufficient heat up time for the electric booster to operate,
if required, to satisfy the requirements of AS 3498.
The booster heating unit will only activate if heating is required and power is available from the timer. When
the water is below the thermostat setting, the booster heating unit will turn on and heat the water. The
booster heating unit will automatically turn off either when the temperature of the water reaches the
thermostat setting or at the end of the timer period, whichever comes first.
Minimum winter
10°C
15°C
20°C
ABOUT YOUR WATER HEATER
Booster heating unit size
Temperature
2.4 kW
rise
50°C 3 ¼ hours
45°C 2 ¾ hours
40°C 2 ½ hours
7
3.6 kW 4.8 kW
2 ¼ hours 1 ¾ hours
2 hours 1 ½ hours
1 ¾ hours 1 ¼ hours