Siting The Appliance; Required Clearances - Worcester 26CDi XTRA Installation And Servicing Instructions

4. Siting the Appliance

See figs. 2 and 3.
4.1 The appliance may be installed in any room although
particular attention is drawn to the requirements of the current
l.E.E. Wiring Regulations BS 7671 and, in Scotland, the electrical
provisions of the Building Regulations applicable in Scotland,
with respect to the installation of appliances in rooms containing
baths or showers.
Where a room sealed appliance is installed in a room containing
a bath or shower, any electrical switch or appliance control using
mains electricity must not be able to be touched by a person
using the bath or shower.
4.2 The appliance is not suitable for external installation.
4.3 The appliance does not require any special wall protection.
4.4 The wall must be capable of supporting the weight of the
appliance. See Table 4.
4.5 The following clearances must be available for installation
and for servicing: Refer to fig. 2.
4.6 The appliance can be installed in a cupboard used for airing
clothes provided that the requirements of BS 6798 and BS
5440:2 are maintained.
Notwithstanding the instructions given in BS 5440:2. 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.
4.7 The airing space must be separated from the boiler space by
a perforated non-combustible partition. Expanded metal or rigid
wire mesh are acceptable provided that the major dimension is
less than 13mm. See BS 6798:1987.
4.8 No combustible surface must be within 75mm of the casing.
See BS476:4.
4.9 The distance between the inner face of a cupboard door and
the cabinet front should not be less than 75mm.
4.10 Always consider the possible need to disconnect the pipes
from the appliance after installation.
4.11 LPG Installation: The appliance shall not be installed in a
room or internal space below ground level when it is intended for
use with LPG. This does not preclude the installation into rooms
which are basements with respect to one side of the building but
open to ground level on the opposite side.
4.12 Because the appliance operates at high efficiency, a
white plume of condensation will be emitted from the flue
terminal. Care must be taken when selecting the position for
the flue terminal.
Keep clear of security lighting, activated by passive infra red
sensing heads.
Fig. 2. Appliance casing dimensions and

required clearances.

Side view
360mm 600mm*
* Space required for installation and servicing
IMPORTANT:
The flue system inclines 2
towards the appliance. Depending on the flue length an
additional allowance must be added to the minimum
clearances.
e.g. With a side flue system one meter long, measured
from the side of the appliance casing, the minimm
clearances required:
above the flue turret
above the appliance
Above the flue turret
* An additional allowance may be required to
accommodate the 2
with a side flue. Refer to fig. 2.
In front
Below
Right-hand side
Left-hand side
6
30mm*
180mm
min
225mm
Front view
450mm
200mm* 10mm* 10mm*
1 °
/ (44mm per meter length)
2
30+44=74mm and
180+44=224mm
Installation Service
30mm min.* 30mm
1
/ ° flue incline when installed
2
600mm 600mm
200mm 200mm
10mm 10mm
10mm 10mm
min