Jøtul I 620 Serie Manual De Uso página 42

ENGLISH
well. Then adjust the ignition to 20-25% and air vents to
60% to 70%.
• The conditions for controlling combustion vary depending
on the temperature in the burn chamber and the draught
in the chimney.
• The door must be closed when the fi replace is not in use.
Important! It is important to get the wood burning quickly
and we therefore recommend that you open up the air supply.
Burning at too low a temperature and with too little air can in
some cases cause gas ignition which may damage the stove.
Refuelling on to a low fi re bed: If there is insuffi cent burning
material in the fi rebed to light a new fuel charge, excessive
smoke emission can occur. Refi lling must be carried out onto
a suffi cient quantity of glowing embers and ash that new
fuel charge will ignite in a reasonable period. If there are too
few embers in the fi re bed, add suitable kindling to prevent
excessive smoke.
Fuel overloading: The maximum amount of fuel specifi ed in
this manual should not be exceeded, overloading can cause
exess smoke.
Operating with door left open: Operation with the door
open can cause excess smoke. This appliance must not be
operated with the appliance door left open except as directed
in the instructions.
Dampers left open: Operation with the air controls or
apploance dampers can excess smoke. The appliance must
not be operated with air controls, appliance dampers or door
left open exept as directed in the instructions.
5.4 Chimney
The chimney is the engine that drives the fi replace and it's
essential to have a good chimney in order for the fi replace to
function properly.
The draught in the chimney creates a vacuum in the stove.
This vacuum draws the smoke out of the stove and takes in air
through the combustion air baffl e to fuel the burning process.
The combustion air is also used for the airwash system that
keeps the window clear of soot.
The draught in the chimney is caused by the difference in
temperatures inside and outside the chimney. The greater
the temperature difference, the better the draught in the
chimney. It is therefore important to allow the chimney to reach
operating temperature before adjusting the air vents to restrict
combustion in the stove (a brickwork chimney takes longer to
reach operating temperature than a steel chimney).
It is particularly important to reach operating temperature
as quickly as possible on days on which the draught in the
chimney is poor due to unfavourable wind and weather
conditions. Make sure the fuel ignites as quickly as possible.
Practical tip: Chop the wood into much smaller pieces and use
an extra fi relighter.
NB: If the stove has not been used for some considerable
time, it is important to check the chimney pipe for blockage.
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5.5 Chimney and fl ue pipe
• The fi replace can be connected to a chimney and fl ue pipe
approved for solid fuel fi replaces with fl ue gas temperatures
as specifi ed in "2.0 Technical Data".
• The cross-section of the chimney must be at least that of
the fl ue pipe. Use "2.0 Technical Data" to calculate the
correct chimney cross-section.
• The fi replace must be connected to a chimney and fl ue
pipe approved for solid fuel fi replaces with fl ue gas
temperatures as specifi ed in «2.0 Technical Data».
• Before a hole is made in the chimney, the fi replace should
be test-mounted in order to correctly mark the position of
the fi replace and the hole in the chimney. See fi g. 1 for
minimum dimensions. NB: This does not apply if the stove
is installed inside a hearth.
Please note that it is extremely important for connections to
have a degree of fl exibility. This is to prevent any movement in
the installation leading to the formation of cracks.
NB: A correct and airtight connection is extremely important
for the function of the product.
Weight must not be transferred from the fi replace structure
to the chimney. The fi replace structure must not hinder the
chimney's ability to move, and must not be anchored to the
chimney.
For recommended chimney draught, see "2.0 Technical
Data". If the draught is too strong, a fl ue pipe damper can be
installed and used to reduce the draught.
Warning against overheating
Never overheat the fi replace
The fi replace has been designed and tested for use at a
nominal output of 9 kW. This corresponds to a combustion rate
of about 2,8 kg of wood per hour.
The maximum amount each time is 3,1 kg per hour (3-4 logs
at a time).
Important!
Never have a fi re burning with the ignition vent fully open for
any length of time. A sure sign of overheating is when parts of
the stove glow red. If this happens, reduce the air vent opening
immediately.
Seek professional advice if you suspect that the chimney is not
drawing properly (too much/too little draught).
Odours when using the fi replace for the
fi rst time
When the fi replace is used for the fi rst time, it may emit an
irritating gas which may smell slightly. This is because the
paint on the outside is drying. The gas is not toxic but you
should open some windows to ensure the room is thoroughly
ventilated. Let the fi re burn with a high draught until all traces
of the gas have disappeared and no smoke or odours can be
detected.