6
ROOM THERMOSTAT
A room thermostat may be fitted for control of the central heat-
ing temperature. The method of setting a room thermostat varies with
the type and manufacture. Refer to the instructions supplied with the
room thermostat.
THERMOSTATIC RADIATOR VALVES
If thermostatic radiator valves are to be fitted to the system then
they must conform to the requirements of BS2767:1972. It is advisable
to leave one valve permanently set at maximum to prevent the boiler
short cycling.
SHOWERS, BIDETS, TAPS AND MIXING
VALVES
Standard hot and cold taps and mixing valves used with the appli-
ance must be suitable for operating at the available mains pressure. The
use of thermostatically controlled or pressure equalising shower valves
will guard against the flow of water at too high a temperature.
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 individ-
ual taps will vary with the number of outlets operated simultaneous-
ly and the cold water mains supply pressure to the property. Flow bal-
ancing 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 Ltd.
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. Cistern fed hot water supply will stop once the cistern has
emptied but the appliance can still be used for heating provided that
the system is of the sealed system type. Open vent central heating
systems should be turned off until the supply is restored.
USE IN HARD WATER AREAS
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 require-
ments 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 Limited.
AIR SUPPLY FOR OPEN FLUED (O.F.)
APPLIANCES
Fresh air is required for combustion
Your installer will have made arrangements for an adequate sup-
ply of fresh air to the appliance. Do not block up any air ways which
may be let into a wall or door. Do not hang clothes or other com-
bustible materials over the appliance or against the flue pipe.
