Bosch BSS250E-2 Installation And User Manual page 49


Switch off the electrical supply at the isolating switch to the solar storage tank and at
the power outlet for the solar control unit.

Unscrew the water heater drain fitting, sliding the temperature probe out until water
flows freely.

If it is necessary to run the water away from the heater (eg. if the tank is indoors), the
wires to the temperature probe can be unscrewed from the controller circuit, and reconnected
later, allowed the probe to be removed from the drain fitting.

Ensure the heater is refilled with water before reconnecting electrical power.
WATER SUPPLIES ANALYSIS
Your „Bosch‟ solar water heater is manufactured to suit the water conditions of most Australian
metropolitan supplies. However, there are some known water supplies which can have
detrimental effects on the water heater and its operation and/or life expectancy. If you are
unsure of your water quality, you can obtain information from your local water supply authority.
WARRANTY of this product is VOID where the product is installed in areas where corrosive
water is present or has been present in the product in the time span of the warranty. This
product should only be connected to a potable water supply.
Water that is corrosive to copper is typically associated with some bore water supplies of water
not treated by water authorities to ensure against copper corrosion. Corrosive water for copper
can result in premature failure of the product through hot water copper pitting corrosion where
small holes develop in the inner tank or copper panels and the product eventually leaks.
The following criteria shall be met under the terms of the Warranty to ensure that water is not
corrosive or scaling to copper.
1. pH is greater than 7.0 (pH > 7.0)
2. Bicarbonate to sulphate ratio is greater than 2:1 (>2:1)
3. Langelier Saturation Index (LSI) is greater than negative 1 and less than plus 0.8 (-1 <
LSI<0.8)
NOTE: WATER HEATERS NOT INSTALLED IN ACCORDANCE WITH THE ABOVE ADVICE
WILL NOT BE COVERED BY WARRANTY.
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