Specifications

Instruction 24-9388
51
Fyrite Pro
Appendix A – Formulas and Tables
CO
2
=
CO
2 max
(20.9 – O
2
%)
20.9
qA =
(TA – TL) x ( +B)
A2
20.9 – O
2
λ (Excess Air) =
20.9
20.9 – O
2
Eta = (100% – qA) + [K
f
, if TA < (T
0
– 1.2 x O
2
)]
CO Air Free (Undilute) = CO x λ
CO/CO2 =
CO
ppm
x 10
–6
CO
2
% x 10
–2
Where:
O
2
= Measured Oxygen in percent
TA = Measured stack temperature in °C
TL = Measured combustion air temperature in °C
CO = Measured carbon monoxide level in ppm
CO
2
= Calculated carbon dioxide level in percent
qA = Calculated stack loss in percent
λ =CalculatedLAMBDA
A2, B, CO
2 max
, T
0
, and K
f
are constants (see table below):
Fuel
Code
Fuel A2 B CO
2 max
T
0
K
f
F1 Natural Gas 0.66 0.009 11.8 58 °C 9.6%
F2 Propane 0.63 0.008 13.8 54 °C 7.6%
F3 Light Oil 0.68 0.007 15.4 51 °C 5.3%
F4 City Gas 0.63 0.011 13.1 0 °C 0%
Efficiency = Eta – K
f