Lennox SLP98DF070XV36B - Proper Combustion Analysis; Combustion Parameter Checks

Page 56
FIGURE 48
Field Installed
Gas Valve
Manifold Pressure Measurement
FIGURE 49
Negative Port
Positive Port
Gas Valve
Measuring Device
Field Installed
Operating Signal (Delta P) Measurement
Black Tubing +
Red and Black Tubing or Red Tubing -
F- Proper Combustion
Furnace should operate minimum 15 minutes with correct
manifold pressure and gas flow rate before checking com
bustion. Take combustion sample beyond the flue outlet
and compare to the tables below.
TABLE 30
High Fire
SLP98DFV Unit
CO
2
%
For Nat
CO
2
%
For L.P.
070
6.5 - 9.0 7.7 - 10.2
090
110
The maximum carbon monoxide reading should not exceed 100 ppm.