Backpuffing-A hot combustor (above 1400o F) can sometimes act like a glow plug (spontaneous combustion ignitor). Usually the wood gas-to-air mixture is either too lean or too rich to form a highly flammable mixture. There are times when this mixture is just right within the firebox during the normal burning process. If the combustor is running at or above the ignition temperature of the mixture, spontaneous combustion will result, causing the stove to vent puffs of smoke.

Non-UniformFlow-Non-uniform flow causes the combustor to heat and cool unevenly and is a result of fuel- loading configuration. This occurs when the flow pattern of the fire is concentrated on one side of the combustor. This condition causes thermal stress within the ceramic, resulting in cracking.

TROUBLESHOOTING

Operation of any wood heater can create problems. While the use of a catalytic-combustor equipped stove will substantially lessen some of these problems—such as creosote formation—other traditional wood-heater problems may remain.

The following guidelines apply to operation of all wood heaters, with problems related to catalytic heaters addressed where appropriate.

HEATER RELATED PROBLEMS

 

Problem

 

Possible Cause

 

Solution

1.

Sluggish heater performance

1.

Obstruction in chimney

1.

Check for and remove

 

 

2.

Improperly sealed trim kit

 

obstruction

 

 

2.

Check trim kit gasketing seal

 

 

 

or direct connect kit

 

to fireplace and gasket as nec-

 

 

 

 

 

essary to seal unit. Gasket

 

 

 

 

 

under stove if needed. Check

 

 

 

 

 

seal of direct connect and

 

 

3.

Manual damper in chimney

 

correct.

 

 

3.

Open manual damper and

 

 

 

is closed

 

wire shut with stainless steel

 

 

4.

Closing bypass or exhaust

 

wire or remove damper.

 

 

4.

Follow New Buck

 

 

 

damper too soon

 

instructions for proper firing

 

 

5.

Wet or unseasoned wood

 

procedures.

 

 

5.

Burn dry, seasoned wood

 

 

 

being burned

 

 

 

 

6.

Too much wood added to

6.

Add small amounts of wood

 

 

 

too few coals

 

to small coal beds. Once a

 

 

 

 

 

good bed of coals has been

 

 

 

 

 

established more wood can be

 

 

7.

Dislodged stove parts

 

added.

 

 

7.

Check all movable heater

 

 

8.

Poor chimney draft

 

parts. Replace if necessary.

 

 

8.

See section in “Chimney-

 

 

9.

Combustor is plugged

 

Related Problems”

 

 

9.

See section in “Combustor-

 

 

 

 

 

Related Problems”

 

 

 

 

 

 

2.

Drop in Overall Efficiency

1.

Cold, windy weather

1.

Weather stripping, caulking,

 

 

2.

Burning wet, pitchy or

 

insulation, storm windows

 

 

2.

Burn quality wood available

 

 

 

spongy wood

 

in your area

 

 

3.

Combustor not in operating

3.

Close bypass or engage

 

 

 

mode

 

combustor when temperatures

 

 

 

 

 

are high enough and

 

 

4.

Combustor not functioning

 

stabilized

 

 

4.

See “Combustor-Related

 

 

 

 

 

Problems”

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New Buck Corporation 20 Room Heater manual Troubleshooting, Heater Related Problems, Problem Possible Cause Solution