Section 3

Ice Machine Operation

 

 

HARVEST SEQUENCE 5. Water Purge

The harvest valve(s) opens at the beginning of the water purge to divert hot refrigerant gas into the evaporator.

The water pump continues to run, and the water dump valve energizes for 45 seconds to purge the water in the sump trough. The water fill valve energizes (turns on) and de-energizes (turns off) strictly by time. The water fill valve energizes for the last 15 seconds of the 45-second water purge.

After the 45 second water purge, the water fill valve, water pump and dump valve de-energize. (Refer to “Water Purge Adjustment” for details.)

6. Harvest

The harvest valve(s) remains open and the refrigerant gas warms the evaporator causing the cubes to slide, as a sheet, off the evaporator and into the storage bin. The sliding sheet of cubes swings the water curtain out, opening the bin switch.

The momentary opening and re-closing of the bin switch terminates the harvest sequence and returns the ice machine to the freeze sequence (Step 3 - 4.)

AUTOMATIC SHUT-OFF 7. Automatic Shut-Off

When the storage bin is full at the end of a harvest sequence, the sheet of cubes fails to clear the water curtain and will hold it open. After the water curtain is held open for 30 seconds, the ice machine shuts off. The ice machine remains off for 3 minutes before it can automatically restart.

The ice machine remains off until enough ice has been removed from the storage bin to allow the ice to fall clear of the water curtain. As the water curtain swings back to the operating position, the bin switch re-closes and the ice machine restarts (steps 1 - 2), provided the 3 minute delay period is complete.

SAFETY TIMERS

The control board has the following non-adjustable safety timers:

•The ice machine is locked into the freeze cycle for 6 minutes before a harvest cycle can be initiated.

•The maximum freeze time is 60 minutes at which time the control board automatically initiates a harvest sequence (steps 5 & 6).

•The maximum harvest time is 3.5 minutes at which time the control board automatically initiates a freeze sequence (steps 3 & 4).

WARM WATER RINSE CYCLE

Closing the back of the evaporator allows ice to build up on the rear of the evaporator and the plastic evaporator frame parts. After 200 freeze/harvest cycles have been complete the control board will initiate a warm water rinse.

After the 200th harvest cycle ends:

•The Clean and Harvest LED’s energize to indicate the ice machine is in a warm water rinse.

•The compressor and harvest valve remain energized.

•The water pump energizes.

•The water inlet valve energizes until water contacts the water level probe.

•The compressor and harvest valve warm the water for 5 minutes, then de-energize.

•The water pump remains energized for an additional 5 minutes (10 minute total on time) then de- energizes.

NOTE: The warm water rinse cycle can be terminated by moving the toggle switch to the OFF position, then back to ICE.

Part Number 80-1560-3

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Manitowoc Ice S0850M manual Harvest Sequence 5. Water Purge, Automatic SHUT-OFF 7. Automatic Shut-Off, Safety Timers
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S0850M specifications

The Manitowoc Ice S0850M is a cutting-edge ice maker designed to meet the needs of busy commercial environments. Known for its reliability and efficiency, this machine is specifically engineered to produce high-quality ice for various applications in restaurants, bars, hotels, and other foodservice operations.

One of the standout features of the S0850M is its capacity. This model can produce up to 850 pounds of ice in a 24-hour period, making it an ideal choice for establishments that require a steady supply of ice throughout the day. The ice produced is of the cube style, which is versatile for use in beverages, food displays, and more, ensuring that it meets the demands of both front-of-house and back-of-house operations.

The Manitowoc Ice S0850M is equipped with advanced technologies that enhance its performance and energy efficiency. The unit utilizes an efficient air-cooled condenser, which allows for better heat exchange, reducing energy consumption. Additionally, its programmable slow freeze technology ensures that the ice is formed slowly, resulting in clear, high-density cubes that melt slowly, minimizing dilution of beverages.

Durability is another key characteristic of the S0850M. Constructed with stainless steel, the machine is designed to withstand the rigors of commercial use while preventing corrosion and ensuring long-lasting performance. Its compact design allows for easy installation in various locations, and it can fit well under counters or in tight spaces, providing flexibility for ice storage solutions.

For ease of use, the S0850M comes with intuitive controls that allow operators to manage production cycles efficiently. The machine also includes a built-in diagnostic system, providing real-time status updates and alerts for any maintenance needs, ensuring that the ice maker operates smoothly without unexpected downtime.

Finally, the Manitowoc Ice S0850M is designed with food safety in mind. It meets hygiene standards, preventing contamination within the ice production process. This attention to food safety and health regulations makes it a preferred choice for businesses looking for a dependable commercial ice maker.

In summary, the Manitowoc Ice S0850M ice maker combines capacity, efficiency, durability, and advanced technology to provide high-quality ice production for busy foodservice operations, ensuring that establishments can meet their ice needs effectively and reliably.
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