Specifications

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WARNING
Each FCM Series boiler is tested at the factory and adjustments to the air-
fuel mixture are normally not necessary. Consult a U.S. Boiler representative
before attempting to make any such adjustments. Improper gas valve or
mixture adjustments could result in property damage, personal injury, or loss
of life.
12) Testanyexternallimitsorothercontrolsinaccordancewiththemanufacturer’sinstructions.
13)Verifythattheboilerstartsandstopsinresponsetocallsforheatfromtheheatingthermostatandindirectwaterheater
thermostat.Makesurethattheappropriatecirculatorsalsostartandstopinresponsetothethermostats.
14)Asshipped,theheatingandindirectwaterheatersetpointsupplytemperaturesarebothsetto180°F.Ifnecessary,adjust
thesetotheappropriatesettingsforthetypeofsystemtowhichthisboilerisconnected.SeetheOperationsectionofthis
manualforinformationonhowtodothis.
15)Adjusttheheatingandindirectwaterheaterthermostatstotheirnalsetpoints.