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6
Your installer will
have provided adequate
space around the
appliance for safety and
servicing. Do not restrict
this space by the
addition of cupboards,
shelves etc. close to the
appliance.
NOTE: If the appliance is to be enclosed after the
installation then the instructions given in Section 6, Air
Supply, of the Installation Book MUST be followed.
ROOM THERMOSTAT
A room thermostat must be fitted for control of the central
heating temperature. It will be located in one room of the home. 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 fitted to the system then they
must conform to the requirements of BS2767. The radiator located in
the room where the room thermostat is sited must be controlled by a
thermostatic radiator valve.
SHOWERS, BIDETS, TAPS AND MIXING
VALVES
Standard hot and cold taps and mixing valves used with the
appliance 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
overrim 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 The Worcester 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. The appliance can still be used for heating provided that the
system is of the sealed system type.
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TO LIGHT THE APPLIANCE
Check that the water valves to the central heating circuit are open.
Check that the black needle on the pressure gauge is not below
the required pressure.
Switch on the mains electricity. Set the room thermostat to
maximum. Turn the central heating temperature control knob fully
clockwise.
The burner will light and the red flame detection indicator will light.
Set the central heating and hot water temperature control knobs
and the room thermostat, if fitted, to the desired temperature.
TO STOP THE APPLIANCE
For Short Periods
Turn the central heating temperature control knob fully anti-
clockwise to the ‘O’ position.
For Long Periods
Turn the operating switch to the ‘O’ position. Switch off the
mains electricity.
A facia mounted electronic programmer will retain its settings for
about two weeks, after which it will return to the factory set
programme. The time will be saved for approximately 7 hours. The
display will disappear after approximately 1 hour.
A facia mounted mechanical programmer will require resetting
once the operating switch has been set to ‘O’, or the mains supply has
been disconnected.
ELECTRICITY SUPPLY
FAILURE
If the electricity supply fails the appliance will not operate. Once
the supply is restored the appliance will return to normal operation. If
a programmer is fitted, check that the settings have been maintained.
OVERHEAT CUT-OFF
THERMOSTAT
The appliance will enter a lockout condition in the event of
overheating.
An overheat cut-off thermostat is fitted to the appliance which
will interrupt the electricity supply to the gas valve.
If the overheat cut-off has operated, the fault indicator will flash
once a second. If this condition continues to occur, then call a service
engineer.
The appliance can be reset by pressing the fault indicator button
and holding in for 5 seconds when the appliance has cooled.
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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 The Worcester
Technical Helpline.
VENTILATION OF ROOM SEALED FANNED
FLUE (RSF) APPLIANCES
These are room sealed appliances and any 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.
CIRCULATING PUMP
This may be fitted with a speed adjuster. If so it will be factory
set at maximum and should not be changed.
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 Technical Helpline will advise you on suitable frost
precautions. For short periods the built-in frost protection of the
appliance will be adequate.
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
personnel or other competent persons will discuss regular servicing
arrangements and offer a comprehensive maintenance contract.
WARNING
If a gas leak exists, or is suspected, turn off the gas supply to the
appliance at the service cock and consult your local service engineer.
Do not touch any electrical switches to turn them either on or off.
Open all windows and doors. Do not smoke. Extinguish all naked lights.
CLEANING
Do not use abrasive cleaners on the outer casing. Use a damp
cloth and a little detergent.
Under no circumstances should any seal on the boiler be broken.
IGNITION LOCKOUT
The appliance will enter a lockout condition in the event of the
burner failing to ignite.
If the burner fails to light after 5 attempts the electricity supply
to the gas valve will be interrupted.
If ignition lockout has occurred, the fault indicator will flash
slowly (approximately once per second).
The appliance can be reset by pressing the reset button and
holding in for 5 seconds. Check that the gas supply has not been
interrupted.
If this condition continues to occur, then call a service engineer.
AIR FLOW DEVICE
The appliance will enter a lockout condition in the event of an
air flow fault.
If the controls fail to detect the correct air flow through the
appliance the electricity supply to the gas valve will be interrupted.
If an air flow fault has occurred, the fault indicator will flash
(approximately five times per second).
The appliance will try to re-light after a waiting period of
approximately 5 minutes Check that the flue terminal has not been
obstructed or damaged.
If this condition continues to occur, then call a service engineer.
TO LIGHT AND STOP THE
APPLIANCE
RSF
Left-hand side 10 80
Right-hand side 10 80
In Front 600 240
Above the casing 180 30
Below 200 200
CLEARANCES Unventilated
compartment
above flue elbow
or turret
Minimum clearances in millimetres.
