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HOW YOUR WATER HEATER WORKS
13
“ONE SHOT CONTROL” SWITCH
The “One Shot Control” switch has been specially developed to help provide
maximum savings with electrically boosted solar water heaters connected to a
continuous electricity supply. Power must be available to the “One Shot Control”
switch before the booster heating unit can be activated.
The switch has a push button operation
and incorporates a neon light indicator.
This neon light will come on when the
water in the boosted section of the solar
storage tank falls more than 6°C below
the thermostat setting, indicating
boosting may be required.
When you decide the hot water is below
a usable temperature and additional hot
water is required, press the control
button. The neon light will go out and the
booster heating unit will be turned “ON”.
The booster heating unit is automatically
turned “OFF” when the water
temperature reaches the thermostat
setting.
It is not necessary to activate the booster heating unit every time the neon light is
on (the neon light indicates the water is more than 6°C below the thermostat
setting). The water may still be at a usable temperature for some purposes (e.g.
showering) and you may not need to use hot water for some hours during which
time the water may be heated by the sun.
Remember, even on cloudy days your solar water heater can receive diffused
radiation, which will heat some of your stored water. On these days you will
need to operate the booster heating unit only as desired. For summer
operation it is recommended trial periods be undertaken to determine if it is
necessary to turn the booster switch or one shot control ‘on’ at all.
GOING ON HOLIDAYS
If you plan to be away from home for a few nights, we suggest you leave the water
heater switched on. If you plan to be away for a longer period, conserve energy by
switching the booster switch “OFF”. It is not necessary to switch off the electrical
supply at the power outlet to the solar control unit. Refer to “To Turn Off The Water
Heater” on page 5. Also if the system is not used for a period in excess of 4 weeks
it is recommended the solar collectors be covered.