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6
SHOWERS, BIDETS, TAPS AND MIXING VALVES
Hot and cold taps and mixing valves used in the system must be suitable for operating at
mains pressure.
Thermostatically controlled shower valves will guard against the flow of water at too high
a temperature.
If using a pressure equalising valve, set the Domestic Hot Water temperature control
knob to the MAX position.
Hot and cold mains fed water can be supplied direct to an over-rim flushing bidet subject
to local Water Company requirements.
With all mains fed systems the flow of water from the individual taps will vary with the
number of outlets operated simultaneously and the cold water mains supply pressure to
the property. Flow balancing using Ball-o-Fix type valves is recommended to avoid an
excessive reduction in flow to individual outlets. For further information contact Worcester
Heat Systems Technical Helpline.
HOT AND COLD FLOW
If the flow of water demanded from both hot and cold service outlets is dependent upon
mains supply, it may not be possible in some installations to operate all outlets
simultaneously.
WATER MAINS FAILURE
It is important to note that in the event of a mains water supply failure, no tap water will be
available until the mains supply is restored.
USE IN HARD WATER AREAS
Normally there is no need for scale protection. However, in areas of exceptionally hard
water supply it is recommended that an In-Line scale inhibitor be fitted.
Installation should be strictly in accordance with the requirements of the local Water
Company. An isolating valve to facilitate servicing should be incorporated.
The water hardness may be determined using the standard test paper or by reference to
the local Water Company.
Further information may be obtained from Worcester Heat Systems Technical Helpline.
VENTILATION OF ROOM SEALED FANNED FLUE (RSF) APPLIANCES
These are room sealed appliances and do not require a supply of air for combustion from
inside the building. Ventilation openings in a wall or door must not be obstructed. Do not
allow the flue terminal fitted on the outside wall to become obstructed or damaged.
NOTE: Do not place anything on top of the appliance. If the appliance is fitted in a
compartment do not use the compartment for storage purposes unless it conforms to the
requirements of BS 6798:1987: Section 6. It is essential that the airing space is separated
from the boiler space by a perforated non-combustible partition as described in BS
6798:1987.
FROST PRECAUTIONS
If the appliance is not to be used for a long period of time and there is a likelihood of
freezing, then the appliance should be drained. The Worcester Heat Systems Technical
Helpline will advise you on suitable frost precautions.
SERVICE
Annual servicing is important in order to ensure continuing high efficiency and long life for
your appliance. In the event of any difficulty in making suitable servicing arrangements,
Worcester Heat Systems Limited or other competent persons will discuss regular servicing
arrangements and offer a comprehensive maintenance contract.
6


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