Power Flame C2-OA - Flame Safeguard Control Flame; Ratio Curves for Fuel

This curve correlates the relative values of O
2
and CO
2
for the
fuels listed, as well as the percentage of excess air at given
O
2
and CO
2
values.
Example: Following the dotted line on the vertical axis from
4% O
2
to curve H and the dotted line on the horizontal axis to
the left, the % excess air column shows that 4% O
2
equals
25% excess air.
Following the vertical dotted line axis again from curve H to
fuel A (Natural Gas) and the horizontal axis to the left, the %
CO
2
column shows that 4% O
2
and 25% excess air correlate
to 9
1
/
2
% CO
2
for Natural Gas.
Again following the 4% O
2
vertical axis fo fuel line E (#2 Fuel
Oil ) and to the left to the CO
2
column shows that 4% O
2
and
25% excess air correlate to 12
1
/
2
% CO
2
on
#2 Fuel Oil.
This chart can be used to determine required CO
2
or O
2
values (and therefore equivalent BTU input values) for
the secondary fuel when the burner has been properly
adjusted for the primary fuel inputs.
Flame Safeguard Control Flame Signal Values
Control Photocell or Flame Rod U.V. Lead Sulfide
R7795A or C N/A 3
1
/
2
microamps N/A
R7795B or D 2 microamps N/A N/A
R479A (D) 2 microamps 1
1
/
2
microamps N/A
R4140M (G,L) or 2-5 microamps R7248A Red Amp
BC7000 2-5 microamps 3
1
/
2
- 7
1
/
2
microamps 3
1
/
2
microamps R7248B Red Amp
R7800 1.25-5.0 DC Volts 1.25-5.0 DC Volts N/A
TFM - 2(3) or MII 14-17 DC Volts
1
N/A N/A
UVM - 2(3)(5) or MII N/A 5-6 DC Volts N/A
D Series 15-25 DC Volts 15-25 DC Volts 15-25 DC Volts
E110 10 min., 20 or greater normal 10 min., 20 or greater normal N/A
Table 12
Acceptable Stable Pilot and/or Main Flame Current Readings
1. 4-10 Microamps - with microammeter in series with S - 2 wire to flame rod.
Table 13
CO
2
- O
2
Ratio Curves for Fuel Oils and Gases
170 17
160 16
150 15
140 14
130 13
120 12
110 11
100 10
90 9
80 8
70 7
60 6
50 5
40 4
30 3
20 2
10 1
PERCENT EXCESS AIR
PERCENT CARBON DIOXIDE (CO
2
)
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 20.93
PERCENT OXYGEN (O
2
)
H
F
E
D
G
C
B
A
CURVE FUEL MAXIMUM CO
2
%
A Nautral Gas 11.7
B Natural Gas 12.1
C Propane 12.1
D Butane 14.0
CURVE FUEL MAXIMUM CO
2
%
E #2 Fuel Oil 15.2
F #5 Fuel Oil 16.0
G #6 Fuel Oil 16.9
H Excess Air vs. O
2
C41
Rev.304