IBC SL 26-260 G3 Quick Start Manual page 2

Combustion Test Target Ranges
Figure 1 Gas valve and fan
The Low Fire (Zero-offset) valve adjustment cap on the gas valve has been factory set. Do not tamper with or adjust
this screw in the field. Contact the factory for written instructions if considering field adjustment of the Low Fire (zero
offset) adjustment.
The High Fire (Gas:Air) ratio adjustment screw is a slotted brass screw to the left of the long brass protrusion on the
front of the gas valve. It will have to be adjusted to attain optimum combustion results whenever fuel conversion is
undertaken; however, no mixture adjustment shall be performed unless done by a qualified technician using properly
functioning and calibrated combustion analyzing equipment.
Fuel
Natural Gas
9.0 – 10.0
Propane
10.3 – 11.3
Table 1 Combustion test target ranges - CO
Note: Low Fire CO 2 should be at least 0.5% lower than High Fire CO 2 .
2 |
High Fire
Range Target
9.5
10.8
/ Maximum CO
2
Low Fire Co Max PPM
Range Target
< 150
8.2 – 9.2 8.7
< 250
9.3 – 10.3 9.8