INSTALLATION
6
Fig. 7
DESN 510454 A
HIGH UPDRAUGHTS
NOTE: In some circumstances it may be possible to
overheat the appliance and the water inside will boil.
This will be evident by the sound of a knocking noise
coming from the appliance and pipes around the
house. If this occurs, close off all air controls and
manually start the central heating pump if fitted.
Opening the oven doors and hotplate covers will
help to release heat from the appliance. Be aware
that steam and boiling water will be expended from
any open vent from the heating system probably in
the roof space at the expansion tank.
Boiler - Recommendations
Water circulators which are continually operative will in
conjunction with prolonged burning under banked
conditions create cool boiler surfaces within the firebox.
This in turn will encourage boiler surface condensation
followed by surface oxidisation and reduced life span of
the boiler.
To minimise this incident we strongly recommend a
water pipe clamp on thermostat e.g. EBERLE Type 8750
or SATCHWELL SUNVIC Type PA fitted to the heating
return pipe and sited between the injector tee and the
cooker as shown on Fig. 5 -
Typical Central Heating Hot Water System.
The thermostat should be electrically connected to the
water circulator as indicated on the ‘Typical Wiring
Diagram’ Fig. 6 and the adjustable dial should be set at a
temperature of 50ºC (122ºF). A fall in the return pipe
water temperature below 50ºC interrupts the power to
the water circulator which will then not operate until the
temperature exceeds 50ºC and power is restored.
FAILURE TO CONFORM TO THIS
RECOMMENDATION MAY RESULT IN PREMATURE
FAILURE OF THE BOILER.
Tall chimneys may develop excessively high updraughts
which prevent the appliance operating correctly.
It is recommended that a proprietary brand adjustable
flue draught stabiliser having an operable cross sectional
area of 126cm
2
be fitted above the flue pipe connection,
either in the brickwork or into a right-angle ‘T’ fitting in
the flue pipe position that will not inconvenience
appliance operation or maintenance.
The flue dilution lever may be used to combat temporary
high updraughts such as high winds but is not intended
to replace a draught stabiliser.
Place the cooker in the intended position and lift out the
surface ground hotplate, checking that the joint between
the underside of the hob and the top of the cooker are
intact.
Any joints which have opened should be made good with
fire cement provided.
If the appliance is installed near combustible material
then as well as adhering to minimum clearances in Fig. 1
additional non-combustible insulation must be fitted to
the wall to protect the area around the flue and fluebox.
The insulation must reach a minimum distance of
150mm either side of the flue/flue box and follow the line
of the flue. The minimum specification for this material is
Superwool 607 LTI with a density of 320kg/m
3
, a
thickness of 10mm and a self finish. There must be a
minimum 16mm air gap between the insulation board
and an adjacent combustible wall surface. A higher
specification material may be used but the air gap must
be maintained.
Replace the hotplate making sure that it is seating evenly
on the soft rope seal and that it is approximately 1.5mm
proud of the enamelled top plate, with an equal space all
round.
Connect pipework to boiler flow and return tappings.
Fit the flue chamber which should be given a 1mm
smear of fire cement on the underside then screwed to
the cooker. Make sure there is a good seal between the
flue chamber and the cooker top (if there is an ingress of
air it can affect the flue draught and proper working of
the cooker). Before the fire cement hardens remove any
surplus with a damp cloth then polish with a dry cloth.
Open the firebox and ashpit doors and check that the
bottomgrate is in position. Operate the riddling lever to
ensure the bottomgrate operation.
Failure to do so can result in the enamel surface being
permanently marked.
