Product Overview

WARNING

SOOTDEPOSITSINTHEFLUEPASSAGESAREASIGNTHATTHEBOILERMAYBEOPERATING

AT HIGH CARBON MONOXIDE (CO) LEVELS. AFTER CLEANING THE BOILER OF SOOT DEPOSITS,

CHECKTHECOLEVELINTHEFLUEGASTOINSURETHATTHEBOILERISOPERATINGPROPERLY.

 IfitisnecessarytocheckCO,useacombustionanalyzer,orotherinstrumentwhichisdesignedtomeasureCOinue

gas.ACO“sniffer”designedfortestingCOlevelsinambientaircannotbeusedtocheckboilercombustion.Takeaue

gassamplebyinsertingasampleprobethroughthedraftdiverteropeningandintotheuecollectorsothatthesampleis

takenintheareadirectlyovertheheatexchanger.Donottakeasampleuntiltheboilerhasbeenringforatleastvemin-

utes.

A normal CO reading for a CGS-C series boiler is less than 50ppm (0.005%). A reading of more than 100ppm (0.01%)

is indicative of a combustion problem.

Some causes of excessive CO include:

• Incorrectlysizedmainburneroriceforthealtitudeatwhichboilerisinstalled

• Crookedorout-of-roundoriceholes(neverattempttodrilloriceforthisboilerintheeld)

• Partiallypluggeduepassages

• Improper manifold pressure

• Foreign material in burner venturis or burner ports

• Leakinsealbetweenuecollectorandheatexchanger

•  Inadequate supply of combustion air

XII. Service Instructions (continued)