North American LE, LEx and GLE Burner and Reaction Chamber Storage, Installation, Assembly and Initial Firing SUPPLY PIPING AND INSTALLATION INFORMATION:
Sheet 4200-1
Special care should be exercised in piping and component location when installing the burner. All interconnect piping should be de- signed to allow easy access to the burner and facilitate removal of components if required. It is recommended that thin walled tubing extensions be used to provide accessibility to pressures read from burner taps at commissioning. These include upstream air pressure, downstream or duct pressure, primary, secondary (if applicable), and radial fuel pressures.
Orientation of control valves and the direction in which they open is important for proper burner operation.
Main Air: when the control valve is located close the burner, the valve should never be oriented such that the air will be driven to the rear of the burner body. It is acceptable for the valve to open towards either side; however, the preferred orientation would have the air driven towards the front of the burner. It is recommended that elbows in the air supply piping be located no closer than 3 pipe diam- eters to the burner. Radial Air: when the control valve is located close to the burner, the valve should never be oriented such that it would induce a counter- clockwise spin. The preferred orientation would have the air inducing a clockwise spin as viewed from the back of the burner; however, it is acceptable to have the air driven towards or away from the burner mounting flange. If the control valve is manual, it should be accessible from the floor or a platform. Pilot Gas: the downstream solenoid or blocking valve should be located within several feet of the pilot. This minimizes the amount of time for fuel to reach the pilot. GENERAL: Unless otherwise specified, all LE, LEx and GLE burners and reaction chambers are manufactured with a low porosity dense castable material. All refractories in the burners and reaction chambers have been wet-cured and oven-dried to approximately 500°F during manufacture. Fives North American Combustion, Inc. offers the option to pre-fire burners and reaction chambers per manufacturer’s recommendation to 1500° - 1800°F prior to shipment. This removes all mechanical and chemical water from the refractory in a time and temperature controlled method. The top level assembly drawing will note if the pre-firing was performed. Special LE, LEx and GLE burners specified to be manufactured with high porosity light weight material MUST be pre-fired prior to ship- ping. STORAGE: It is recommended that all burners and reaction chambers remain in their original packaging until they are ready for assembly and installation. This includes leaving thread protectors and caps in place to prevent foreign objects from entering the parts. While stored, the equipment should be protected from sources of significant moisture such as rain or snow. Parts stored in areas where the temperature is below 60°F should be slowly warmed prior to firing. STANDARD OVEN DRIED: Burners and reaction chambers which have been oven dried may be stored in areas where temperatures are below freezing as me- chanical water has been removed. It is safe to store equipment in this condition for several years. Follow the Initial Firing Schedule to slowly remove chemical water prior to putting into production.
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