Worcester WR325 RSF Installation And Servicing Instructions page 3

The complete installation, including the gas meter, must be
tested for soundness and purged. Refer to BS 6891.
2.7 PACKING
The appliance and flue components are packed in separate
cartons.
2.8 GENERAL INSTALLATION
Any specified ventilation openings made into a wall or
compartment door must not be obstructed.
If the appliance is to be fitted into a compartment then the
compartment must conform to the requirements of BS
5440:2:1989 and BS 6798.
Not withstanding the instructions given in BS 5440:2:1989 and
BS 6798, this appliance may be fitted in a compartment with no
vents as long as the minimum clearances stated in Section 6:
Air Supply, are maintained.
Do not place anything on top of the appliance.
The clearances specified for servicing must be maintained.
It is generally advised to fit a bypass to all systems.
2.9 FLUE
The appliance has a multi-directional horizontal fanned flue
system.
The standard telescopic flue assembly length is from 135mm to
615mm.
Extension flue lengths are available from 500mm to 3500mm.
A vertical flue kit is available for up to 2600mm including a vertical
terminal.
Optional 45° and 90° flue bends are available.
A terminal guard, Type K2, GC 393 553, is available from Tower
Flue Components, Vale Rise, Tonbridge, TN9 1TB.
Do not allow the flue terminal fitted to the outside wall to become
obstructed or damaged.
A kit for internal fixing of the flue is available separately.
2.10 CONTROLS
The electronic control system and gas valve controls the heat
input in response to the domestic hot water requirements.
The ON/OFF switch is used to turn the appliance on and off.
The DHW control varies the flow rate and therefore controls the
water temperature. As the flow rate decreases (clockwise) the
temperature increases.
Supplied By www.heating spares.co Tel. 0161 620 6677
2.11 SYSTEM NOTES
IMPORTANT
Check that no dirt is left in either the gas or water pipework as
this could cause damage to the appliance. Thoroughly flush the
cold water mains supply in accordance with the
recommendations of BS7593: 1992.
Purge the gas supply before finally connecting the appliance.
2.12 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.
2.13 SAFETY CONSIDERATIONS
The appliance must not be operated in a waterless condition.
The appliance must not be operated with the boiler casing cover
removed.
Work must not be carried out on the appliance without the gas
and electricity supplies being switched off.
Checks must be made to ensure that the ventilation openings
made into walls and partitions are of the correct size and are
not obstructed.
2.14 OPERATION
Domestic Hot Water: With a demand for hot water the burner
will light and then automatically adjust its output to maintain the
temperature of the delivered water. When hot water is no longer
required, the burner will extinguish. The fan may continue to
run for a short period to dissipate the residual heat from the
appliance.
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