CONTENTS , cont.
Trouble-Shooting 7218 Air/Gas Ratio Regulators - Cross-Connected.......................................................39 Trouble-Shooting Nozzle-Mix Gas Burners.....................................................................................................40 XSA Operation - Variable Ratio Regulator.......................................................................................................41 XSA Operation - Full Air Pressure-Controlled Impulse.................................................................................43 For Most Accurate Control with High Pressure Gas, use Individual Cross-Connected Line Regulators..................................................................................45 Trouble-Shooting Pressure-Reducing (Line) Regulators................................................................................46 OIL AND DUAL-FUEL SYSTEMS Ratiotrol and Oil Burner....................................................................................................................................... 47 3 Pipe Dual-Fuel Burner.......................................................................................................................................48 4 Pipe Dual-Fuel Burner.......................................................................................................................................49 PILOT SYSTEMS Gas Supply to 4011 Pilots.....................................................................................................................................50 Pilot Piping.................................................................................................................................................................51 Pilot Adjustment......................................................................................................................................................52 Natural Gas Flames of a 4011 Premix Pilot Set.............................................................................................53 Trouble-Shooting Pilots - Spark Ignition...........................................................................................................54 Trouble-Shooting Pilots - Spark or Manual Ignition......................................................................................54 Trouble-Shooting Pilots.........................................................................................................................................55 Trouble-Shooting Pilots - Flame Detection......................................................................................................56
MANIFOLDS Gas and Air Manifolds Do's and Don'ts........................................................................................................... 57
VALVES, LINKAGES Adjustable Port Air Valve Adjustments..............................................................................................................58 Valve Linkage Adjustments..................................................................................................................................59
APPENDIX Judging Flames.......................................................................................................................................................61
INDEX, NOMENCLATURE ....................................................................................................................................62
Record Your Settings ..........................................................................................................................................63
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