High Temperature Cabinet Ovens

High temperature cabinet ovens are ruggedly built for long hard usage at elevated temperatures, offering a choice of two air flow patterns.

Outside Dimensions

• Control panel overhang 9″ right side
• Blower motor overhang 17″ (26″ HC Series); H Series right side, V Series rear
• Electric model HX, HB, HZ, HY, HC—Heater terminal overhang 5″ rear and left side
• Gas Model—Burner overhang 15″; H Series left side, V Series right side

Operating Characteristics

• Accuracy as percent of controller span
• Uniformity at 100°F below maximum temperature
• Rise Time in minutes to 100°F below maximum temperature
• Tests run with empty oven and minimum exhaust
• Performance will vary with load and application

Certifications

• UL Listed Control Panel
• Meets the Requirements of the Following Standards:
• NFPA 86 (Standard for Ovens and Furnaces)
• NFPA 70 (National Electric Code)
• FM (Factory Mutual)
• OSHA

Caution:

• When processing combustible material fire protection should be considered
• Processing flammable solvents or vapors requires forced exhaust to provide safety ventilation

Safety Equipment

• Adjustable manual reset excess temperature interlock to turn off heat on malfunction of main temperature controller
• Recirculating blower air flow safety switch to turn off heat on loss of recirculated air flow
• Electrical interlock shuts off heat if power to recirculating blower is interrupted

Electric Heat Includes

• Separate heating element control contactors to turn off heat on malfunction of main control contactors

Gas Heat Includes

• Modulating burner for 1000 BTU per cubic foot natural gas at 6” water column pressure – propane available. Inlet 1” NPT
• Automatic pre-ignition purge period to clear accumulated gas or fumes
• Push button electric ignition
• Microprocessor based electronic flame safeguard protection to continuously monitor flame and close gas valves if flame is not present
• 325 CFM powered forced exhauster to provide combustion venting
• Exhauster air flow safety switch to close gas valves on loss of venting
• Two pilot valves to guarantee gas flow to pilot can be stopped
• High and Low gas pressure switches to confirm safe operating pressure range
• Two main burner safety shut off valves with valve seat position indicator to assure gas flow to main burner can be stopped
• Proof of closure switch on one main valve to prevent igniting pilot unless main valve is closed
• Leak test station at each pilot and main burner valve to allow testing for leakage through valve

Controls

• Digital temperature controller
• Heat chamber temperature controller on 1250⁰F models to limit heating element temperature
• Motor control push buttons and on-off heat switch
• LED pilot lights
• 5 kA short circuit current rating (SCCR)

Construction

• Choice of

* Recirculating air flow patterns – Horizontal or Vertical air flow

*Electric or Gas heat

*208 volt, 230 volt or 460 volt, 3-phase, 60 HZ – other input power available

• All welded construction
• Durable, electrically isolated, Incoloy tubular heating elements
• Heat source located in heat chamber to prevent radiant heating
• High pressure stainless steel recirculating blower
• Full coverage supply and return duct work with adjustable opposed louvers
• Adjustable fresh air intake and 4” diameter (6” on Gas Heat) exhaust outlet damper
• Channel shelf supports prevent shelves tipping
• Insulated with 2” of refractory ceramic fiber and 10 lbs per cubic foot density rockwool insulation
• 16 gauge 304 stainless steel interior with stainless hardware
• Aluminized steel exterior with Trilite Green enamel finish
• Brushed stainless steel control panel face
• Exceptionally heavy duty doors, hinges and door frame with explosion venting latches
• Slip flashing at doorway to allow inner oven to expand without affecting door sealing
• Dual fiberglass door gasket with stainless steel spring insert; one gasket seals to inside door surface and second seals to outer oven face
• Fully assembled and factory tested for temperature uniformity

READ ON OUR BLOG:

Standard & custom-made Grieve ovens in action