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4. Siting the Appliance
The appliance is not suitable for external installation.
The appliance may be installed in any room subject to the
requirements of the IEE Wiring Regulations or the electrical
provisions of the Building Regulations applicable in Scotland
relevant to appliances fitted in rooms containing baths or
showers. It must not be possible for anyone using the bath or
shower to touch any control using mains electricity.
No special wall protection is required. Ensure that the wall can
support the appliance. Refer to the IGE publication "Guide for
Gas Installations in Timber Framed Housing" where appropriate,
IGE/UP/7:1998.
The specified clearances must be available for installation and
servicing. Refer to Fig. 2 and 3.
The appliance can be installed in a cupboard/compartment to
be used for airing clothes providing that the requirements of
BS6798 and BS45440:2 are followed. The low casing losses from
the appliance eliminate the need for ventilation openings in the
compartment.
The airing space must be separated from the boiler space by a
perforated non-combustible partition. Expanded metal or rigid
wire mesh is acceptable provided that the major dimension is
less than 13mm.
The clearance between the front of the appliance and the
cupboard or compartment door should not be less than 75mm.
The pipe connection positions on the manifold are shown in Fig.4
and on the wall template allowing the system to be pre-piped
and flushed before the appliance is fitted.
Always consider the possibility that the pipes may need to be
separated from the appliance after installation.
5. Flue Systems
The only flue systems that may be used are those sold by
Worcester Heat Systems.
The flue system must be installed in accordance with the
requirements of BS5440:1.
Standard 100mm flue system.
The standard concentric flue system provides for a horizontal
length of upto 2m. Full instructions for fitting this flue are in
Section 12 Installation.
Alternative 125mm diameter flue systems.
Systems are available to give a maximum horizontal length of
10m (this system requires a greater clearance above the
appliance. Refer to Fig.3.) A vertical flue system upto a height of
8 metres is available. A twin-pipe system is available for
extended lengths or difficult situations.
NOTE: A 100mm vertical flue systems will be available in the
future.
Installation instructions for the alternative flue systems are sent
with the appropriate flue kit.
45° and 90° bends can be used with a corresponding reduction
in flue length of 1m for each 90° bend and 0.5m for each 45°
bend used.
IMPORTANT: The horizontal flue system fitted to a condensing
boiler must incline towards the appliance at an angle of 2
(44mm per metre length) to prevent condensate dripping
from the flue terminal. This means that the clearance above
the appliance must be increased to match the duct length.
Fig. 2. Casing dimensions and clearances.
512
100
STANDARD CONCENTRIC HORIZONTAL FLUE SYSTEM
Fig.3. Casing dimensions and clearances.
512
100
ALTERNATIVE CONCENTRIC HORIZONTAL FLUE SYSTEM
Fig. 4. Manifold connections.
20
30
65
Central
heating
flow
Valve
1
/
°
2
clips
5
115
390
100
115
390
100
200
65
65
Domestic
Cold
hot
water
water
inlet
Gas
Wall mounting manifold plate
215
850
250
315
850
250
10
65
Central
heating
return
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