Installation Requirements; Gas Supply; Electricity Supply; Location Of Boiler - Potterton Osprey CF 125 Installation & Service Instructions Manual

1. Installation Requirements - Page 6

1.1 Gas Supply

The meter and supply pipes must be capable of delivering
the required quantity of gas in addition to the demand from
any other appliances in the house and must be governed at
the meter.
If this is not achieved the local gas supplier must be
contacted.
A minimum 22mm gas supply pipe should be used up to the
inlet connection of the gas cock on the boiler. The pipe
diameter required will depend upon the length - see Section
2. and BS 5449: 1990 - Appendix B.
The complete installation must be tested for gas soundness
and purged as described in BS6891.

1.2 Electricity Supply

230V ~ 50Hz via a fused double pole switch with a contact
separation of at least 3 mm in both poles adjacent to the
boiler. Power consumption is approximately 10W. There
must be only one common isolator for the boiler and its
control system and it must provide complete electrical
isolation. A plug complying with the requirements of BS 1363
(if fitted) must be accessible to the user after installation of
the appliance.
Fuse the supply at 3 A. The minimum requirement for the
power supply cable is that it should be a PVC sheathed cord
at least 0.75 mm2 (24 x 0.2 mm) (code designation HO5 VV-
F or HO5 VVH2-F) as specified in table 16 of BS6500:1984.
All wiring external to the boiler shall comply with the latest
IEE Wiring Regulations, and any local regulations which
apply.
WARNING: THIS APPLIANCE MUST BE EARTHED.
In the event of an electrical fault after installation of the
boiler, preliminary electrical systems checks must be carried
out i.e. Earth Continuity, Short Circuit, Polarity and
Resistance to Earth.

1.3 Location of Boiler

The boiler is not suitable for external installation. The boiler
must stand firm and level on a non combustible surface. No
special floor protection is needed, but finishes which soften
when warm e.g. linoleum and plastic floor tiles should be
removed or may be protected by an insulating sheet at least
10mm thick.
The boiler must be installed so that the draft diverter is in
free air according to the clearance dimensions shown in
Fig. 2.
The flue duct should not be closer than 25 mm to
combustible material. A metal sleeve should be installed to
surround the flue duct to provide a 25mm annular space.
Further guidance is given in BS5440:1:1990, sub-clauses
3.3 and 4.2.5.
If the boiler is to be installed in a timber framed building it
should be fitted in accordance with the British Gas
publication- Part 19 - Building and Kitchen Work. If in doubt
advice must be sought from Potterton Myson.
Conventional flue boilers can be installed either in a kitchen
or utility room or (125 and 150 models only) inside a suitably
ventilated, purpose designed or modified compartment.
Where the installation of the boiler will be in an unusual
position, special procedures may be necessary and BS6798
and BS5546 give detailed guidance on this aspect.
A compartment used to enclose the boiler is only allowed if
the clearances shown in Fig. 2 and the air requirements of
BS 5440 Part 2 are followed to allow correct functioning of
the draft diverter (125 and 150 models only).
If the boiler is to be fitted in a run of kitchen units it is
recommended that the boiler is fitted first or the adjacent
units removed.
The boiler requires the clearances shown in Fig. 2.