Chassis

• Monolithic, low carbon steel weldment – the heaviest constructed roasters in their class.
• Fully gusseted for dimensional strength and stability.
• Fully coated to prevent corrosion.
• Integrated double-walled roast compartment is heavily insulated which further converts the chassis into a thermal battery – storing heat, rather than wasting it.
• Materials in both the chassis and the roast compartment absorb heat more efficiently and release heat more consistently for increased stability of temperatures during profiling.
• Trapping heat = trapping noise. Ambient drum noise is limited to a whisper quiet 60 decibels making it easier to hear those early outliers before first crack.

Drum

• Double-wall, shaftless drums standard on the M-series. The heaviest, most-efficient drum design in the industry.
• 3mm air gap between inner and outer drum diffuses heat more evenly throughout inner drum.
• Diffused heat at inner wall eliminates conductive roast defect, even at higher inlet temperatures.
• Dramatically increased thermal efficiency by storing & using heat, rather than quickly releasing.
• “Bomb proof” construction prevents warping due to operator error.
• Every model equipped with quick response, variable drum speed allowing the operator to achieve ideal bean loft and conductive vs. convective ratio. Result is the flexibility to profile batches from 20%-120% of listed drum capacity on most models.
• New, rear-mount drum gap adjustment mechanism making adjustments more precise while maintaining a clean faceplate.

Fuel

• Custom-designed, CSA® Design Certified low-loss gas train.
• New Stainless steel burners designed specifically for coffee roasting.
• Burner layout is specific to each model to achieve optimal burner-to-drum relationship.
• Easy access, external shut-off valves on every roaster.
• Built-in temperature limiters to allow for safe operation.
• Built-in safety shut-off on pilot valve.
• Easy on-site conversion from LP to natural gas.
• Digital electronic modulating valve offering greater control for your most challenging profiles in variable batch sizes.
• Fuel adjustments at the push of a button.

Air & Exhaust

• New Custom-built centrifugal fans integrating run-quiet design. Designed and built in-house. 
• Roaster exhaust fan is high pressure, high output 3-phase VFD speed controlled with linear response curve for more predictable and more precise airflow control and roast profiles repeatability.
• Cooling tray exhaust fan is a dedicated, high-pressure fan providing rapid cooling to stop roast progression once batch is dropped in cooling tray. Dual exhaust system allow for simultaneous roasting and cooling, reducing back-to-back batch times and increasing production to 4+ batches per hour.
• Drum pressure monitoring.
• All models equipped with dedicated, off-board chaff filtering collectors with easy access doors to aid in frequent clearing of chaff and completion of safety checks.
• Fully specified requirements for venting to termination including layout and cap recommendations.

Safety

• CSA® Design Certified CSA 1.8 for US and Canada.
• CSA/UL certified Honeywell automatic ignition controller
• CSA/UL certified motors, relays, switches, and wiring.
• Optional UL® NSF Certification available on every model.
• Hopper, loading chute, faceplate, trier, discharge gate, discharge chute, cooling tray cover, cooling tray floor, stirring/mixing arms, cooling tray gate, cooling tray gate - all custom fabricated with certified food-grade stainless.
• Teflon cooling tray wipers.
• New Extra-large, heavy-duty borosilicate sight glass.
• Food safe resin-impregnated trier handle.
• New Custom torque-limiting stirring arm arm motors to prevent accident and injury.

Control Panel & Touch Screen

• New 15.6" Touchscreen monitor accompanied by haptic-responsive jogwheel
• New Simplified controls through streamlined UI offering machine control through Mill City Roaster's HMI or any RoastPATH account (includes free accounts)
• New Five angie, pivoting mounting arm and four vertical adjustments allow for standing or seated operation. Screen has full-tilt capability.
• New Extra USB-A outlet on control panel for use with third-party software.

Install & Maintain

• Designed with off-board cooling fans and stand-alone chaff collectors to allow for easier moving, better access and easier maintenance. Off-board components can offer more flexible layouts for users with space limitations.
• Modular components for moving units through standard size door openings. Removable hoppers on all models.
• Heavy-duty, adjustable legs on all components.
• Quick-release clamps on all connecting parts.
• Roaster body features large access doors on both sides for easy access to interior components.
• New Cooling tray stirring assembly and perforated bottom easily removeable from above for cleaning.
• New Custom design cooling tray perforation design covers support bars to eliminate debris build-up in the perforations.
• Warranty

Gas: Natural gas or LP gas.

Power: Single phase, 220-230V, 20A, 50-60Hz

Venting type: Category III, Positive Pressure exhaust line(s) to termination outdoors.

Venting size: Roaster exhaust: 6" diameter; Cooling Tray exhaust: 4" diameter