Trane IntelliPak 2 Series Installation, Operation And Maintenance Manual page 181

Figure 137. Natural gas combustion curve (ratio of oxygen to carbon dioxide in percent)
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1
0
0 1 2 3 4 5
Table 63. Recommended manifold pressures and CO
FIR-
ING
MB- RAT- % CO
2
ES NAT GAS
H
850 100% 8.0-9.0
510 60% 5.0 -7.0
1100 100% 8.0-9.0
550 50% 5.0 -7.0
1800 100% 7.0- 8.0
900 50% 5.0- 7.0
2500 100% 7.5- 8.5
1250 50% 5.0- 7.0
RT-SVX24Q-EN
Curve
A =
A
6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21
Percent Oxygen
2-STAGE
%
MANIF CO2P-
PRESS RO-
"W.C.
PANE
3.0-3.5 9.0-10.0
0.8-0.95 5.0-7.0
3.0-3.3 9.0-10.0
0.8-0.95 5.0-7.0
N/A
1.5- 1.8
N/A
0.5- 0.7
N/A
2.0- 2.5
N/A
0.5- 0.7
Fuel
1,000 BTU per cu ft.
of Natural Gas
levels during furnace operation
2
MANIF FIR-
PRESS MB- ING
"W.C.
H RATE
3.0-3.5 850 100%
1.5-3.0 85 10%
3.0-3.3 1100 100%
0.8-0.95 55 5%
N/A
1800 100%
N/A
90 5%
N/A
2500 100%
N/A
125 5%
MODULATING
%
% MANIF CO2P-
CO2N- PRESS"- RO-
AT GAS W.C.
PANE
8.0-9.0 3.0- 3.5 7.8-8.4
5.0 -7.0 0.8- 0.9.5 2.0-3.0
7.0-9.0 .8-.9 8.5-9.5
1.5-3.0 .05-1.0 1.5-2.5
N/A
7.0-9.0 1.5- 1.8
N/A
1.5-3.0 .05-1.0
N/A
7.0-9.0 2.0- 2.5
N/A
1.5-3.0 .05-1.0
U U n n i i t t S S t t a a r r t t u u p p
MANIF
PRESS"-
W.C.
1.7-2.2
.1-.2
.5-.75
.02-.04
N/A
N/A
N/A
N/A
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