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ECLIPSE BURNER WITH 50:1 TURNDOWN RATIO
The furnace is heated with one Eclipse Model 50 MMB Minimatic burner with integral air and gas butterfly valves. The burner is mounted in the furnace with a special 2100F burner block and holder. The blower has an 1/8 H.P. motor. This burner features a 50:1 gas turndown ratio which allows extremely good temperature control over a wide range of temperatures. All piping and controls are included. The gas system includes two solenoid shut offs and manual shut off valve. The control of firing rate is done with a motorized butterfly valve which controls the amount of natural gas and combustion air relative to a 4-20 milliamp signal from the temperature control. A pilot gas train is also included with needle valve for adjustment and solenoid shut off valve. A main gas regulator and main gas shut off valve is included. The burner is located in the back of the furnace at the top of the chamber, firing over the load. The vestibule on the top front of the furnace hangs down so that the flame does not impinge directly on the door. There is one flue at the back top. This location vs. the location of the burner makes the burner flame circulate all the way around the inside of the chamber for maximum efficiency. The burner can deliver up to 500,000 total Btu/Hr with a minimum of 10,000 Btu/hr.
FLAME SAFETY SYSTEM
The burner is ignited with a spark plug actuated from the control panel. The burner includes a UV (Ultra Violet) Sensor and electronic flame safety. Before ignition the system goes through a timed purge with the combustion air. A combustion air pressure switch and high/low pressure switch are included. Safety interlocks and purge condition are annunciated on the control panel.
HIGH TEMPERATURE UNIFORMITY
The furnace is uniform to within +/ 25F (+/-12C) above 1200F (650C) within the working dimensions.
EFFICIENT CERAMIC FIBER INSULATION
The sides, back, door and top surfaces are insulated with 2300F ceramic fiber modules, 6” thick, 10 LB density. No asbestos is used.
STRONG CASTABLE REFRACTORY BOTTOM
The bottom is insulated with 6” of lightweight, strong and highly insulating 2200F castable. 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 10 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.
DOUBLE PIVOTED HORIZONTAL DOOR
The standard furnace door has two pivots which allow it to open like a parallelogram. This keeps the hot face of the door away from the operator. A door vestibule made of ceramic fiber board surrounds the door perimeter. The top vestibule drops down 6” from the top to prevent the burner flame from impinging directly on the door.
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. Thermocouple break protection is included. Limit switches shut off burner if the door is opened. All 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 can be quoted as an option. Furnace meets all OSHA codes in effect at manufacture. Furnace drawings can be submitted to FM or IRI for approval.
FACTORY TESTING AND INSTRUCTIONS
The furnace is completely tested in our factory up to maximum temperature. A very complete instruction manual is included with the furnace.
ONE YEAR WARRANTY
The furnace is warranted for one year.
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