ProSelect Force Steam Gas Boiler Installation Manual
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WARNING
SOOTDEPOSITSINTHEFLUEPASSAGESAREASIGNTHATTHEBOILERMAYBEOPERATING
ATHIGHCARBONMONOXIDE(CO)LEVELS.AFTERCLEANINGTHEBOILEROFSOOTDEPOSITS,
CHECKTHECOLEVELINTHEFLUEGASTOINSURETHATTHEBOILERISOPERATINGPROPERLY.
IfitisnecessarytocheckCO,useacombustionanalyzer,orotherinstrumentwhichisdesignedtomeasureCOinue
gas.ACO“sniffer”designedfortestingCOlevelsinambientaircannotbeusedtocheckboilercombustion.Takeaue
gassamplebyinsertingasampleprobethroughthedraftdiverteropeningandintotheuecollectorsothatthesampleis
takenintheareadirectlyovertheheatexchanger.Donottakeasampleuntiltheboilerhasbeenringforatleastvemin-
utes.
AnormalCOreadingforaFORCESTMseriesboilerislessthan50ppm(0.005%).Areadingofmorethan100ppm
(0.01%)isindicativeofacombustionproblem.
SomecausesofexcessiveCOinclude:
• Incorrectlysizedmainburneroriceforthealtitudeatwhichboilerisinstalled
• Crookedorout-of-roundoriceholes(neverattempttodrilloriceforthisboilerintheeld)
• Partiallypluggeduepassages
• Impropermanifoldpressure
• Foreignmaterialinburnerventurisorburnerports
• Leakinsealbetweenuecollectorandheatexchanger
• Inadequatesupplyofcombustionair
XII. Service Instructions (continued)