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with the centre-line of the chimney,
and must also extend to the point
where the chimney narrows to its
final size. Any large voids must be
filled and flaunched to the flue pipe
to ensure that all soot deposits can be
cleared when the appliance is swept.
Ensure that the flue pipe is not
obstructed or restricted in any way
and that all joints are well sealed.
Before infilling cover the front of the
fire to protect it. Ensure that the flue
pipe is central and then fill the space
between the body of the fire and the
structural brickwork with vermiculite
(eg. micafil or similar) concrete.
Ensure that there are no air pockets.
The recommended mix is six volumes
of vermiculite granules to one volume
of portland cement thoroughly mixed
together. Enough water should be
added so that no more than one or
two drops of water are released when
a handful of the mixture is squeezed.
After filling with vermiculite flaunch
the top of the flue connector pipe to
the chimney with lime mortar.
Make good the holes in the front and
side of the chimney breast making
sure that they are completely airtight.
A typical installation is shown in
Fig. 10.
In most installations it will be
possible to sweep the chimney
through the appliance. If this is not
possible then some alternative means
(such as a soot door), must be
provided.
The free-inset method of installation
may be used instead of in-filling.
Details are available on request.
THERMOSTAT
Before lighting the fire check the cold
setting distance of the thermostat.
With the control knob at the
maximum setting the flap should be
18 mm from the air inlet as shown in
Fig. 11. To adjust the distance
slacken the locking nut and adjust as
necessary. When set correctly
re-tighten the locking nut. Ensure that
the flap opens and closes freely as the
knob is turned.
Central Heating Flow
Central Heating Return
Drain Cock at Lowest Point
Drain Cock
IndirectHotWater Cylinder
Cold Water Tank
Overflow
Feed and Expansion Tank
22mm Open Vents
Gravity Radiator
CirculatingPump
Central Heating Return
Drain Cock at Lowest Point
Drain Cock
IndirectHotWater Cylinder
Domestic HotWater Draw Off
Cold Water Tank
Overflow
Overflow
Feed and Expansion Tank
22mm Open Vents
GravityRadiator
CirculatingPump
Injector Tee
MinimumReturn Thermostat
Gravity Return
(28mm Pipe)
Central Heating Return
Common Return to Boiler
Central Heating Flow
MinimumReturn
Thermostat
(28mm Pipe)
Overflow
Domestic HotWater Draw Off
Fig.7TypicalCentralHeatingandHotWaterSystem
Using4BoilerTappings
Fig. 8. Typical Central Heating & Hot Water System
Fig. 9. InjectorTee.
Using 3 Tappings
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LA30iB 3.99