Combustion Issues - Jydepejsen Cosmo Mode D'emploi

6. Combustion issues.

Combustion issues may be caused by non-optimal combustion conditions.
Follow the instructions below to resolve such issues:
Issue Explanation
No up-draft - The flue gas damper in the smoke pipe is closed.
- Cleaning door in chimney is defective or missing.
- A bird's nest or similar is blocking the chimney.
- Smoke pipe sooting or soot accumulation on top of the
- baffle plate.
The chimney is too small.
- Incorrectly fitted baffle plate.
- Negative pressure in the home.
Too much up- - Incorrectly fitted baffle plate.
draft
- If you are using kiln dried wood, less air supply is
required than for normal wood.
- DuplicAir® is permanently fully open.
- The door sealing bands are worn and flat.
- The chimney is too large.
The glass - Too much water in the wood.
windows blacken
- Air supply
White glass - Insufficient combustion (temperature in fire chamber is
too low.)
- Incorrect wood firing (use of cull, painted wood,
impregnated wood, plastic laminate, plywood, etc.)
Smoke fills the - Pressure equalization occurs in the fire chamber.
room when the
door is opened
- The chimney and the wood-burning stove are not
cooperating.
- The door is opened with a fire in the fire chamber.
White smoke - The combustion temperature is too low.
- The wood is too damp and contains water vapor.
Black or greyish - Incomplete combustion
smoke
not sufficiently open.
Jydepejsen A/S – September 2019
Correction
- Open the flue gas damper.
- Contact your chimney sweep / wood-burning
stove dealer for further instructions or clean
the smoke pipe and fire chamber.
- Check the baffle plate - please refer to the
operating manual.
- Negative pressure may occur in well-
insulated buildings - increase the air flow to
the room.
- Check the baffle plate - please refer to the
operating manual.
- Reduce the supply of air.
- Check the sealing bands. Worn sealing
bands should be replaced as described in
the operating manual.
- Contact your chimney sweep / wood-burning
stove dealer for further guidance.
- Use dry wood with max 20% humidity only.
- Open
DuplicAir® to feed more air to the
combustion process.
- Follow the instructions for correct firing as
described in this manual.
- Make sure you use clean and dry wood in
your stove.
- Open the air supply completely for about
1 minute before opening the door - avoid
opening the door too quickly
- Check the height of the chimney as this may
be insufficient to provide the minimum up-
draft required for this stove.
- Never open the door when you see flames,
only embers.
- Increase the air supply.
- Make sure you always use clean and dry
wood in your stove.
- Increase the air supply.
.