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The cooker fully meets the requirements of BS: 1252
and is fully approved by the HETAS Ltd Approval
Scheme.
Air for combustion within the firebox and the rate of
burning is determined by the manually operated
spinwheel control on the ashpit door and flue damper.
With normal usage in 24 hours continuous burning the
Rayburn Cookmaster Plus 212SFW has an
approximate output of 100 gallons of hot water. To
provide 2 or 3 hot baths at intervals and normal
household requirements, the following conditions must
be fulfiled:-
Rayburn Cookmaster Plus 212SFW - It is
recommended that a 140 litre (30 galls) indirect hot
water storage cylinder of the double feed type, (e.g.
manufactured by Albion Cylinders) complying with BS
1566 Part 1: DF Type 8 should be lagged and fixed
vertically as near as possible to the cooker.
The maximum water pressure is 1.75 bar.
The water capacity of the boiler is 7 litres.
The 28mm minimum diameter primary flow and return
pipes must not exceed 10m in length and pipes longer
than 5m must be lagged.
Ensure that the flow pipe has an open vent and rises
continuously from the boiler to the cylinder to ensure
good gravity circulation.
The water draw-off pipes to the taps must be dead-leg
connection from the vent/expansion pipe.
A towel rail of not more than 0.5m
2
heating surface may
be heated providing the flow and return pipes are not
more than 5m each in length, and provided the cylinder
and towel rail are lagged. When the hot water storage
cylinder is very closely coupled to the boiler, a towel rail
is advisable as a heat leak, and lagging should not be
applied. A radiator is not recommended.
To obtain the boiler outputs the fire must be idled
overnight, and daytime cooking take place.
All installations must be fitted with a drain tap at the
lowest point of the system.
IMPORTANT NOTE: THESE INSTRUCTIONS MUST
BE STRICTLY OBSERVED. IF THEY ARE
DISREGARDED (E.G. AN UNLAGGED OR OVER-
SIZE CYLINDER), CONSUMPTION OF FUEL MAY BE
EXCESSIVE, AND THE COOKER DAMAGED BY
OVERFIRING.
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.
Rayburn Cookmaster Plus 212SFW - Unscrew the
sheet metal cover plate on the side of the cooker and
remove the insulating material from behind it.
Joint the flow and return connections to the boiler,
replace the insulating material and screw on the cover
plate and collar.
The boiler is now ready for connection to the hot water
cylinder.
THE BOILER
2
Fig. 1
HOT WATER SYSTEM
Minimum clearance to
combustible materials
150mm.