Manitowoc Ice STH003 Severe System Contamination Cleanup Procedure, Change the vacuum pump oil

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SEVERE SYSTEM CONTAMINATION CLEANUP PROCEDURE

1.Remove the refrigerant charge.

2.Remove the compressor.

3.Wipe away any burnout deposits from suction and discharge lines at compressor.

4.Sweep through the open system with dry nitrogen.

IMPORTANT

Refrigerant sweeps are not recommended, as they release CFC’s into the atmosphere.

5.Install a new compressor and new start components.

6.Install suction line filter-drier in front of compressor.

7.Install a new liquid line drier.

8.Follow the normal evacuation procedure, except replace the evacuation step with the following:

IMPORTANT

Dry nitrogen is recommended for this procedure. This will prevent CFC release.

e)Pull vacuum to 1000 microns. Break the vacuum with dry nitrogen and sweep the system. Pressurize to a minimum of 5 psig.

f)Change the vacuum pump oil.

g)Pull vacuum to 500 microns. Break the vacuum with dry nitrogen and sweep the system. Pressurize to a minimum of 5 psig.

h)Change the vacuum pump oil.

i)Pull vacuum to 500 microns. Run the vacuum pump for 1 hour additional hour.

Continued next page

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Contents CM050 CM Model Ice Machines Safety Notices Procedural Notices Read These Before Proceeding Personal Injury PotentialPotential Personal Injury Situation Table of Contents Liquid Line Thermistor CMS050A004 Model NumbersAccessories Legs Manitowoc ICE Machine Cleaner and SanitizerDrain Pump MODEL/SERIAL Number Location Owner Warranty Registration Card GeneralPage Manitowoc ICE, INC Installation Location of ICE MachineICE Machine Heat of Rejection Heat of Rejection Air Conditioning** PeakLeveling the ICE Machine Levelers LegsWater SERVICE/DRAINS Water Supply Water Inlet LinesDrain Connections Drain Pump Water Supply and Drain Line SIZING/CONNECTIONSMinimum Circuit Ampacity Electrical SpecificationsElectrical Requirements Voltage Gfci RequirementsComponent Identification Water Pump Evaporator Shutter Assembly Clean Green BIN Thermostat AdjustmentPower Button Green Operational ChecksSafety Timers Cleaning the Condenser ICE Machine InspectionAIR-COOLED Condenser Interior Cleaning and Sanitizing Interior Cleaning and Sanitizing General Place CLEANING/SANITIZING ProcedurePage Cleaning Procedure Page Page Removal of Parts for Cleaning and Sanitizing TOP Cover Water Shutters ICE Chute Sump Drain Overflow Tube Water Trough Spray BAR, Water Pump and Hose Spray BAR Disassembly Removal from SERVICE/LONG Term STORAGE/WINTERIZATION General SELF-CONTAINED AIR-COOLED ICE MachinesHarvest Refrigeration System Start-UpFreeze Automatic Shut-OffEnergized Parts Chart SELF-CONTAINED ICE Machines SequenceTroubleshooting Diagnosing AN ICE Machine That will not RUNPage ICE Machine will not Harvest ICE Quality is Poor Cubes are SHALLOW, Incomplete or White Freeze Cycle is LONG, LOW ICE Production ICE Machine Runs & no ICE is Produced Freeze Harvest Cycle Psig Beginning Freeze Cycle Discharge Pressure LOW Checklist Analyzing Suction Pressure Procedure StepSuction Pressure High Checklist Problem Suction Pressure LOW Checklist ProblemDischarge Pressure HOT GAS Valve GeneralNormal Operation HOT GAS Valve Analysis Freeze cycle. If Specifications FunctionCheck Procedure No Ice on Ice on Bulb ResultFreeze Time Harvest Time Total Cycle Time Adjusting Finishing Time Additional finishing time checkLiquid Line Thermistor TEMPERATURE/RESISTANCE Chart SM50 Resistance ChartTotal System Refrigeration Charge Component Specifications Check Procedures Check Resistance OHM Values Compressor Electrical DiagnosticsSingle Phase Compressors Check Motor Windings to GroundCompressor Drawing Locked Rotor Compressor Drawing High AmpsCapacitor RelayPage Cycle Times Freeze Time + Harvest Time = Cycle Time Recycle RecoverNew Product Specifications ReclaimRefrigerant RE-USE Policy Page Refrigerant Recovery/Evacuation/Charging ConnectionsRecovery/Evacuation Charging Procedures Page System Contamination Cleanup General No symptoms or suspicion Normal Mild System Contamination Cleanup Procedure Severe System Contamination Cleanup Procedure Change the vacuum pump oilFollow normal evacuation procedures Page Using Pinch Off Tool FIG. a Pinching OFF TubingBrazing Procedures for Danfoss Solenoid Valves Do not disassemble valveMAX F 700C Liquid Line Filter Drier Control Board Wiring Diagrams Tubing Schematic Manitowoc Ice, Inc