Combustion Efficiency TestThe amount of smoke being produced
The amount of CO2 to verify efficiency
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Low Smoke
Draft test is taken at breach, and over the fire
A. Must be taken in the breach before the draft regulator
B. In Fire Chamber
Smoke is take at the breach hole only
CO2 is take at the same hole
Temperature is taken at the breach only
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A. Stack temp (wait for temp to level off)
B. Draft
C. Smoke
D. CO2
When the temp stops rising record the temp
This is the Gross temp
A. Deduct the room temp from gross temp and get the net temp and round off to the nearest 50 degrees
Note: Do not take the temp over the fire!!!
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Temp has stopped rising
Zero the draft gauge and set it on a level surface
Insert into breach hole between the unit and the draft regulator
A. Record the draft reading
B. Looking for .03 - .06
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A. Tube will be hot
B. Insert into burner chamber and record draft
C. Looking for .01 - .02
If over fire draft is high
Adjustment is made with the draft regulator
A. Damper should open more
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Common problems
B. Chimney too small
D. Stack too small
A. Smoke equals soot
Take sample from stack hole
A. Sample drawn through filter paper
B. Results are compared to a chart
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Sometimes it will smoke if there is too much air
A. If there is too much air the test paper will be yellow
B. The oil isn't completely burned and shows up on the paper
During the smoke test take 10 pumps only
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ii. Dirty fan inlet
iii. Motor running backwards
iv. Lack of ventilation
B. Place rubber cap on top
C. Squeeze bulb
D. Invert tester twice
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i. Dirty or worn nozzle
ii. Nozzle not centered or adjusted
iii. Electrodes in the oil spray
iv. Fuel unit: Low pressure or excessive pressure
B. Unit overfired
C. Bad Chamber
D. Poor oil
ii. Additional guide for efficiency
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