Siting The Appliance; Required Clearances - Worcester 24CDi Installation And Servicing Instructions

4. Siting The Appliance

4.1 The appliance may be installed in any room although
particular attention is drawn to the requirements of the current
I.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 specified clearances must be available for installation
and for servicing. See Fig. 2. and Table 8.
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 An 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.
4.8 The distance between the inner face of a cupboard door and
the cabinet front should not be less than 75mm.
Fig. 3. Appliance pipework connections
A CH Flow
B DHW Out
C Mains Cold Water In
D Gas Inlet
E CH Return
F Safety Relief
Screw driver required to operate Valves.
View on underside of appliance showing
24/28 35
= 62.5 87.5
= 127.5 152.5
= 192.5 217.5
= 257.5 282.5
= 322.5 347.5
= 382.5 407.5
Fig. 2. Appliance casing dimensions and

required clearances.

197
mm
Side view
35CDi II
370mm
24/28CDi
360mm
* Space required for installation and servicing
4.9 The pipe connection positions on the manifold are shown
in Fig.3 allowing the system to be pre-piped and flushed
before the appliance is fitted. Always consider the possible
need to disconnect the pipes from the appliance after
installation.
4.10 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.
Valves shown closed.
A B C D E
connections
A
B
C
D
E
F
6
30mm*
24/28CDi
35CDi II
24/28CDi
35CDi II
600mm*
10mm*
200mm*
F
Rear of appliance
Side View
(F)
195
61
(A, B, C, D, and E)
91
159mm
225mm
250mm
Front view
35CDi II
500mm
24/28CDi
450mm
10mm*