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ECLIPSE THERMJET VELOCITY BURNERS
The furnace is heated with three or more Thermjet medium or high velocity burners. These typically fire over the load with burner placement balanced to maximize circulation of the combustion products. In some large units they may be configured to fire over and under the load. These are sized for the proper BTU requirements and fuel type of your furnace. In addition the choice of high or medium velocity is an engineering choice dependent on load configuration and furnace size. The burners feature low N OX emissions, integral gas and air orifice plates (for precise gas and air balancing), high velocity for good temperature uniformity in the furnace, and excellent turn down ratio for a wide range of control. The burners are direct ignition which eliminates the need for a bypass pilot.
FM GAS TRAIN
The gas system includes two hydraulic-mechanical shut off valves, manual shut off valve, pressure regulator, and pressure gauges. Each burner has gas and air adjustment and shut off valves. A proportionating valve, controlled by the combustion air, maintains stoichiometric air/gas ratio. Systems can be designed to fire with excess air for high uniformity at low temperatures. (IRI rated gas train is optional.)
COMBUSTION AIR BLOWER SYSTEM
Combustion air is provided by a centrifugal combustion blower. A pressure gauge and air pressure switch monitor performance. Each burner has separate orifice plates and butterfly valves for precise balancing of air flow. The control of firing rate is done with a motorized butterfly valve which controls the amount of combustion air relative to a 4-20mA signal from the temperature control.
ELECTRONIC FLAME SAFETY SYSTEM, SPARK IGNITOR AND PURGE TIMER
Each burner is ignited with a spark plug automatically actuated from the Eclipse Multi-Flame Series 6000 flame safety system. UV (Ultra Violet) sensors monitor each burner. Before ignition the system goes through a timed purge with the combustion air. Safety interlocks include a combustion air pressure switch and gas high/low pressure switch. The Eclipse Multi-Flame 6000 flame monitoring system keeps the operator apprised of the status of the burners. It includes running time along with voltage signal t o each UV sensor. It will alert the operator of any problem with the burners, air flow or gas pressure and will provide “first out” information to actually pinpoint a problem. The operator only needs to press the RESET key to start the burner firing sequence.
HIGH TEMPERATURE UNIFORMITY
The furnace is +/-15F (+/-7C) above 1200F (650C) within the working dimensions. High uniformity at lower temperatures can be achieved with excess air.
EFFICIENT CERAMIC FIBER INSULATION
The sides, back, door and top surfaces are typically insulated with 2300F ceramic fiber modules, 8” thick, 10 LB density, although this is easily modified for different temperature ranges and applications. No asbestos is used. The bottom is insulated with a combination of castable and firebrick. Loads can be directly placed on this strong bottom. Optional castable piers, and ceramic, silicon carbide, serpentine or flat alloy hearth plates are available.
HEAVY DUTY CASE WITH INTEGRAL STAND
The furnace case is constructed of heavy gauge steel with structural stiffeners, lifting rings and leveling bolts. The case is primed with a high temperature (800F) silicone based paint and finished with heat resistant enamel.
COUNTERBALANCED PNEUMATIC VERTICAL DOOR
The standard furnace door has a counterbalanced vertical door with a pneumatic opener and hand or foot operated valve. Double pivoted horizontal doors are optional (standard on 6 and 8 foot high models.)
DIGITAL PID CONTROL SYSTEM WITH HIGH LIMIT
The standard control is a Honeywell UDC 2300 digital PID 3 mode tuning control. A Honeywell UDC 2300 high limit control is also included. All fuses and controls are located in a NEMA 12 panel. The thermocouple is dual Type K with an Inconel protection tube. A limit switch turns down the burners when the door is opened. Control voltage is 120 volts. The furnace is fully fused. Single point power connection.
MEETS NEC, OSHA AND FM CODES
The wiring of the furnace meets the National Electrical Code. The combustion system meets FM standards. IRI standards are available. Furnace meets all OSHA codes in effect at manufacture. Furnace drawings can be submitted to FM or IRI for approval.
FACTORY TESTING, START UP AND INSTRUCTIONS
The furnace is completely tested in our factory up to maximum temperature. A very complete instruction manual is included. A factory technician will start up furnace in your factory and make all adjustments on site.
ONE YEAR WARRANTY
The furnace is warranted for one year.
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