Eclipse ThermJet Burners for Preheated Combustion Air - Power ...

Key to system schematicsSYMBOL APPEARANCE NAME REMARKSBULLETIN/INFO GUIDEThermJet burnerMain gasshut-offvalve trainMain gas shutoff valve trainEclipse, Inc. strongly endorsesNFPA as a minimum.756Combustion air blowerThe combustion air blowerprovides the combustion airpressure to the burner (s).610PAir pressure switchThe air pressure switch givesa signal to the safety systemwhen there is not enough airpressure from the blower.610NCGas cockSolenoid valve(normally closed)Gas cocks are used to manuallyshut off the gas supply on bothsides of the main gas shut-offvalve train.Solenoid valves are used toautomatically shut off the gassupply on a bypass gas system oron small capacity burner systems.710760Manual butterfly valveManual butterfly valves are usedto balance the air or gas flow ateach burner, and/or to control thezone flow.720Automatic butterfly valveAutomatic butterfly valves aretypically used to set the output ofthe system.72020 Eclipse ThermJet PCA Design Guide No. 206, 3/5/07