31
Dampers left completely open
Operation with the air controls or dampers open can cause excess smoke. The appliance must not be operated
continuously in this position. However, operating the fire on a weak flue (as in some bungalows with relatively
short chimneys) the optimum position of the air supply lever may be half open or more.
With flues of greater efficiency or taller chimneys, smoke clearance may be possible with the air supply lever almost
completely closed. Note that in the latter case, a small area is left open to guarantee chimney ventilation.
Damping Down for Longer Periods
Do not bank up and close the air supply on a hot fire. The right technique comes with a little experience, and
varies with the fuel being burnt. Allow the fire to die down before banking up with fuel. Never close the air supply
fully when leaving overnight.
Seasonal Use
In the summer months or at times when the fire is not being used then the air supply lever may be closed to
eliminate draughts and to minimise the air loss from the room.
It is important that the flue connection, any appliance baffles or throat plates and the chimney are swept prior to
lighting up after a prolonged shutdown period.
Fuels
The table shows the recommended fuel sizes, weights and refuel interval to achieve the outputs given on page
5 in accordance with EN13229: 2001.
16i
18i
50i
60i
70i
60i Low
70i Low
MAXIMUM WOOD SIZE
Length
Diameter
200
75
275
75
300
75
400
100
500
100
400
100
500
100
mm
mm
MAXIMUM REFUEL WEIGHT
1.00
1.28
1.80
2.25
2.84
2.00
2.50
Kg
MINIMUM REFUEL INTERVAL
60
60
60
60
60
60
60
Min
Fuel Overloading
The maximum amount of fuel specified in this manual should not be exceeded, overloading can cause excess
smoke.
Recommended Fuel Types
The Jetmaster 16i, 18i, 50i and 60i Stoves have been assessed and been considered suitable for exemption
under the Clean Air Act 1993 when burning dry wood logs.
Wood
(Recommended and approved fuel for fire to meet requirement of EN13229:2001)
The readiness of wood to burn depends on the density and the size of each piece. Denser hardwoods are
generally better than softwoods such as pine, which when dry burn fast and spit. A split log will catch and burn
better than a full round log. Only well-seasoned wood should be used. This also helps to burn off more of the
tars, reduce the build-up of tar deposits and reduce smoke emission.
“Green” wood should not be burnt as it has
a high moisture content, which makes it difficult to burn, and reduces net heat output. Air-drying, or seasoning,
reduces moisture content, thus making it easier to burn.
The fire burning rate can thus be controlled by the amount of fuel that is used the size of fuel and the refuelling
interval as well as the control of the air supply lever. Kindling wood will burn fast, split logs at a medium rate and
whole logs a little slower. So by mixing the sizes that are burnt and used in conjunction with the air supply control
the fire rate of burn and hence output can be controlled.
Any of the dense hardwoods are recommended such as: - Birch, Beech, Hornbeam, Oak, Ash, Elm and numerous
others not mentioned.
Smokeless Fuels
Smokeless fuels may be burned in basket grates. Use smaller lumps and some slack when banking down for
longer periods of unattended burning.
Of the smokeless fuels, Coalite, Homefire and Anthracite are particularly suitable. Furnace fuels and petroleum
based solid fuels should not be used in Jetmaster Stoves.
