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Fig.1
The Rayburn 345W is intended to supply heating for:-
(a)
Cooking and domestic hot water.
(b)
Cooking, domestic hot water and central heating.
WARNING: THIS APPLIANCE MUST NOT BE USED
WITHOUT WATER CONNECTED, OTHERWISE DAMAGE TO
THE BOILER MAY BE CAUSED AND/OR HEAT DAMAGE
TO THE SURROUNDING SURFACES.
Air for combustion within the firebox is obtained from two
sources.
a) When the appliance is being used for cooking and domestic
hot water only, the rate of burning is determined by the
manually operated spinwheel control on the ashpit door.
b) When central heating is also required, close the spinwheel
control and operate the burning rate by means of the boiler
thermostat.
The cooker has both boiler and cooker flues which are
opened/closed by internal dampers working in conjunction and
operated manually by the cooker/boiler damper at the front of
the cooker.
The setting should be relative to the services required, H for all
services, C for cooking and domestic hot water only.
When using this appliance all the grate plates must be installed
on the grate. This appliance is not suitable for burning solid
mineral fuels or bituminous coal.
Grate riddling is not required under normal burning conditions
but is provided for grate cleaning. Do not allow ash to build up
under the firebox and as a general rule check the ashpan at
each re-fuelling. Empty as necessary.
PREPARATION OF SITE
The non-combustible hearth must be solid and level and
together with the walls adjacent to the cooker and chimney,
conform to current Building Regulations.
The cooker and chimney flue installation should be in
accordance with the relevant recommendations of the British
Codes of Practice BS 8303, BS 6461 Part 1 and BS 7566 Parts
1 to 4 respectively and the central heating system to BS 5449
Part 1. The boiler installation section must also be in
accordance with the byelaws of the local Water Undertaking,
Regulations for the Electrical Equipment of Buildings -
published by the Institute of Electrical Engineers and any
relevant requirements of the Local Authority.
Ensure that any electrical wiring is correctly earthed.
COOKER POSITION
When the cooker is installed in a recess it must be
'freestanding' and not built-in solid at the sides. Ensure that any
combustible material e.g. kitchen furniture is spaced away from
the cooker to the recommended distances. See Fig. 1.
Tiling
Where the cooker is to stand in a recess or against a wall which
is to be tiled, in no circumstances should the tiles overlap
the cooker top plate.
BUILDERS OPENING
The fireplace recess should comply with current building
regulations, and have an opening of 1,080mm wide minimum,
by 343mm deep minimum and 1,680mm high minimum from
floor is recommended.
NOTE: (SEE FIG. 1) PLEASE NOTE: IT IS ADVISABLE TO
CHECK THE SIZE/WIDTH OF YOUR APPLIANCE BEFORE
FINALLY FIXING ANY KITCHEN UNITS SINCE ENAMELLED
CAST IRON CAN VARY IN SIZE.
THE CHIMNEY
The minimum chimney draught requirement at nominal total
heat output is 20 Pa/.08" WG.
The mean flue gas temperature directly downstream of the flue
spigot at nominal heat output is 308ºC.
This appliance is not suitable for installation in a shared flue
system.
The minimum clearance to combustible materials is 150mm.
Checking existing chimney
The internal and external condition of the chimney should be
checked before the appliance is installed and rectification
made where necessary to prevent leakage or porosity. The
soundness of the chimney which should have a minimum flue
dimension of 175mm square or 185mm diameter can be
confirmed by smoke testing. Advice on the test method can be
obtained from HETAS.
When repairing or re-using chimneys its recommended that the
building control office be consulted before the commencement
of work with particular attention to the chimney height and its
termination.
2
DESN 510279 C
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