Combustion Test Target Ranges
Figure1Gas valve and fan
TheLowFire(Zero-offset)valveadjustmentcaponthegasvalvehasbeenfactoryset.Donottamperwithoradjust
thisscrewinthefield.ContactthefactoryforwritteninstructionsifconsideringfieldadjustmentoftheLowFire(zero
offset)adjustment.
TheHighFire(Gas:Air)ratioadjustmentscrewisaslottedbrassscrewtotheleftofthelongbrassprotrusiononthe
frontofthegasvalve.Itwillhavetobeadjustedtoattainoptimumcombustionresultswheneverfuelconversionis
undertaken;however,nomixtureadjustmentshallbeperformedunlessdonebyaqualifiedtechnicianusingproperly
functioningandcalibratedcombustionanalyzingequipment.
Fuel High Fire Low Fire Co Max PPM
Table 1 Combustion test target ranges - CO
2
/ Maximum CO
Note:LowFireCO
2
shouldbeatleast0.5%lowerthanHighFireCO
2
.