Several factors affect combustion efficiency.
Dirty or clogged air
filters reduce the amount of air available for combustion
efficiency. Obstructions in the flue block exhaust gases and
alter the air mixture in the combustion chamber which reduces
efficiency. Air leaks in the combustion chamber also alter the mixture
causing decreased efficiency.
The primary way to
affect change in combustion efficiency when working with modern gas
fired equipment is through gas manifold pressure adjustment.
Confirm manifold pressures are within manufacturers
specifications prior to performing a combustion test. Once manifold
pressures are within limits a combustion test can be performed to
provide information regarding any
adjustments that may be needed.
10,000ppm is equal to 1%.
The formula to convert percent to ppm is: ppm = %gas X 10,000. The formula to convert ppm to percent is:
% = ppm / 10,000.
The 709, 712, and 714 incorporate a differential manometer.
Pressure applied to the (-) port is subtracted from the pressure applied to the (+) port. Examples of pressures being measured:
(+) port = 10"H2O, (-) port = Not Connected, Displayed reading =10"H2O
(+) port = 10"H2O, (-) port = 5"H2O, Displayed reading = 5"H2O
(+) port = Not Connected, (-) port = 10"H2O, Displayed reading = -10"H2O
The sensors in your analyzer will need to be replaced
periodically and calibration is recommended once every year.
Electrochemical sensors by nature are always active. Therefore the time
the analyzer is off and not being used must be taken into account when
determining sensor life. The sensors in your analyzer are warranted for
two years. This warranty does not cover sensors damaged through misuse
of the analyzer.