Fieldpiece HG3 - Wireless HVAC Guide System Analyzer - Manual (Page 20)

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4.3 Combustion OUTPUT FORM
Outputs
CO
2 (Carbon Dioxide) The %CO
2
in the combustion products.
Excess O
2 (Excess Air) The amount of O2 above the minimum theoreti-
cal amount needed for complete combustion. For complete and efficient
combustion, Excess O
2
must be adjusted to manufacturer’s specifica-
tions.
COAF (Carbon Monoxide Air Free) The amount of CO in the combustion
products taking into account the dilution effect of excess O2.
Net Temp (Net Temperature) The stack (vent) temperature minus the pri-
mary air temperature.
Standard Eff (Efficiency) The actual efficiency of the combustion equip-
ment calculated by analyzing the losses up the exhaust.
Siegert Eff (Efficiency) The European standard for combustion efficiency.
See Sec
(See Section) The section numbers on the OUTPUT FORM refer to
the sections in this manual with more detailed information about each
test.
Atmospheric Fan Assisted Natural Gas or LPG
Oxygen (O2) 6-9%
Stack Temperature 325-500°F
Condensing Natural Gas or LG
Oxygen (O2) 6-9%
Stack Temperature 90-140°F
Natural Gas/LPG Power Burners
Oxygen (O2) 3-6%
Stack Temperature 275-500°F
Fuel oil Flame Retention Power Burners
Oxygen (O2) 3-7%
Stack Temperature 325-500°F
Fuel Oil Non-Flame Retention Power Burners
Oxygen (O2) 6-9%
Stack Temperature 400-600°F
Condensing Oil
Oxygen (O2) 3-7%
Stack Temperature 90-140°F
Combustion OUTPUT FORM.
Appropriate levels for combustion equipment chart.
Manufacturer's specifications should always be
determined before adjusting the system.
The OUTPUT FORM displays the
results of the test. Standard
Efficiency should be close to
manufacturer's specifications.