Electric Boosting - Bosch BSS250E-2 Installation And User Manual

SAFETY WARNING:
As the function of the PTR valve 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.
WARNING: If the hot water system is not used for two weeks or more, a quantity of highly
flammable hydrogen gas may accumulate in the water heater. To dissipate this gas safely, it is
recommended that a hot tap be turned on fpr several minutes or until the discharge of gas
ceases. Use a sink, basin or bath outlet, but not a dishwasher, clothes washer or other
appliance. During this procedure, there must be no smoking, open flame or any electrical
appliance operating nearby. If the hydrogen is discharged through the tap, it will probably
make an unusual sound as with escaping air.
CONNECTIONS – ELECTRICAL electric boosting
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 15 Amp 240
V 50Hz power supply.
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. There is a wiring diagram inside the
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 continuous tariff for solar
applications.
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