Manitowoc Ice S1000M manual HARVEST SEQUENCE 5. Water Purge, Harvest, Safety Timers, Section

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HARVEST SEQUENCE 5. Water Purge

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.)

The air compressor energizes after 35 seconds and remains energized throughout the entire harvest cycle. The air compressor will automatically energize for 60 seconds when the harvest cycle time exceeded 75 seconds in the previous cycle.

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 80-1561-3

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Contents S1000M Model Ice Machines Installation Use and Care ManualProcedural Notices Read These Before ProceedingPERSONAL INJURY POTENTIAL Safety NoticesAuCS Automatic Cleaning System Table of Contents continued Section General InformationSection Installation Instructions Manitowoc Cleaner and SanitizerGuardian Sachet Replacement Frequency Table of Contents continued Section Ice Machine OperationSection Maintenance Section Before Calling For ServiceGeneral Information How to Read a Model NumberSection General Information SectionBIN CASTER AccessoriesMANITOWOC CLEANER AND SANITIZER AUCS AUTOMATIC CLEANING SYSTEMModel/Serial Number Location Model/Serial Number LocationMODEL/SERIAL PLATE LOCATION Service Calls Owner Warranty Registration CardWarranty Coverage AUTHORIZED WARRANTY SERVICEWidth, Depth, and Height Dimensions Section Installation InstructionsInstallation Instructions Ice Machine DimensionsIce Machine Heat of Rejection Location of Ice MachineThe location must be free of airborne and other contaminants MINIMUM CIRCUIT AMPACITY Electrical ServiceVOLTAGE FUSE/CIRCUIT BREAKERSELF CONTAINED ICE MACHINE 208-230/3/60 Self-Contained Electrical Wiring ConnectionsFor United Kingdom Only SELF CONTAINED ICE MACHINE 115/1/60 OR 208-230/1/60AIR GAP Water Supply and Drain RequirementsCooling Tower Applications Water-Cooled Models WATER SUPPLYWATER SUPPLY AND DRAIN LINE SIZING/CONNECTIONS Typical Water Supply Drain InstallationPlumbing must conform to state and local codes Is the Ice Machine level? Installation Check ListPotential Personal Injury Situation Before Starting the Ice Machinesv3149 Section Ice Machine OperationIce Machine Operation Component IdentificationFREEZE SEQUENCE 3. Prechill Sequence Of OperationINITIAL START-UP OR START-UP AFTER AUTOMATIC SHUT-OFF 1. Water Purge 2. Refrigeration System Start-UpAUTOMATIC SHUT-OFF 7. Automatic Shut-Off SAFETY TIMERSHARVEST SEQUENCE 5. Water Purge 6. HarvestIce Thickness Check Operational ChecksWATER LEVEL ICE THICKNESS CHECKHARVEST SEQUENCE WATER PURGE Water Purge Adjustment45 second setting 0 second setting THIS PAGE INTENTIONALLY LEFT BLANK Ice Machine Inspection Section MaintenanceMaintenance Exterior CleaningGuardian SACHET INSTALLATION/REPLACEMENT PROCEDUREGuardian Location GUARDIAN SACHET REPLACEMENT FREQUENCY CLEAN UP PROCEDURE FOR DAMAGED SACHET PACKETCLEANING PROCEDURE Interior Cleaning and SanitizingStep Refer to Removal of Parts For Cleaning SANITIZING PROCEDURERemove all ice from the bin 1 gal. 4 l REMOVAL OF PARTS FOR CLEANING/SANITIZINGCleaner 16 oz 500 ml cleanerIce Thickness Probe Removal 1. Water CurtainWater Curtain Removal 2. Ice Thickness Probe4. Water Trough 3. Water Distribution TubeWater Distribution Tube Removal Water Pump Water Level ProbeWater Pump Removal COIL SPRING Dump Valve DisassemblyWater Dump Valve PLUNGER SPRING STOPEvaporator Tray Removal 4-10Drain Line Check Valve Panel Removal Removing the Front Panel4-11 Water Inlet ValveSELF-CONTAINED WATER-COOLED ICE MACHINES Removal from Service/WinterizationPry Open the Water Regulating Valve AUCS→ Accessory 4-12Problem Section Before Calling For ServiceBefore Calling For Service ChecklistCall for service Safety Limit FeaturePage 2004 Manitowoc Ice, Inc. Litho in U.S.A MANITOWOC ICE, INC