ICE MACHINES Q-Model Service Manual

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Refrigeration System Section 7HEAT E XCHANGEREVAPO RAT O REXPANSIO NVALVELO W SIDESER VICE VALVE(BAC K SEATED )xH O T GASSO LEN O IDVALVESCO M PRESSO RSTRAINERxLIQU IDLINESO LEN O IDHAR VESTPRESSUREREG ULATINGVALVExHAR VESTPRESSURESO LEN O IDVALVEHIGH SIDESER VICE VALVE(BAC K SEATED )CHEC KVALVEDRIERDISCHARGE LINEQU ICK CO NNECTSCHRAEDER FITTINGRE M O TE CO NDENSERRECEI VERSER VICE VALVE1/2 OPENCHEC K VALVERCBHEAD PRESSURECO NTR O L VALVEM ANIFO LD SETTEECLO SEDOPENSCA LEOPENCLO SEDVACUUM PUM P/REC O VER Y UNITSV1462Figure 7-17. Remote Charging Connections7-52 Part No. 80-1100-3
Section 7Refrigeration SystemSYSTEM CONTAMINATION CLEAN-UPGeneralThis section describes the basic requirements forrestoring contaminated systems to reliable service.ImportantManitowoc Ice, Inc. assumes no responsibility forthe use of contaminated refrigerant. Damageresulting from the use of contaminated refrigerant isthe sole responsibility of the servicing company.Determining Severity Of ContaminationSystem contamination is generally caused by eithermoisture or residue from compressor burnout enteringthe refrigeration system.Inspection of the refrigerant usually provides the firstindication of system contamination. Obvious moisture oran acrid odor in the refrigerant indicates contamination.If either condition is found, or if contamination issuspected, use a Total Test Kit from Totaline or a similardiagnostic tool. These devices sample refrigerant,eliminating the need to take an oil sample. Follow themanufacturer’s directions.If a refrigerant test kit indicates harmful levels ofcontamination, or if a test kit is not available, inspect thecompressor oil.1. Remove the refrigerant charge from the icemachine.2. Remove the compressor from the system.3. Check the odor and appearance of the oil.4. Inspect open suction and discharge lines at thecompressor for burnout deposits.5. If no signs of contamination are present, perform anacid oil test.Check the chart below to determine the type of cleanuprequired.Contamination/Cleanup ChartSymptoms/FindingsRequired Cleanup ProcedureNo symptoms or suspicion of contaminationNormal evacuation/recharging procedureMoisture/Air Contamination symptomsRefrigeration system open to atmosphere for longer than 15minutesMild contamination cleanup procedureRefrigeration test kit and/or acid oil test shows contaminationLeak in water-cooled condenserNo burnout deposits in open compressor linesMild Compressor Burnout symptomsOil appears clean but smells acridMild contamination cleanup procedureRefrigeration test kit or acid oil test shows harmful acid contentNo burnout deposits in open compressor linesSevere Compressor Burnout symptomsOil is discolored, acidic, and smells acridSevere contamination cleanup procedureBurnout deposits found in the compressor and lines, and inother componentsPart No. 80-1100-3 7-53
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Safety NoticesAs you work on a Q-Se
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Table of ContentsSection 1General I
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HEALTH, SAFETY & THE ENVIRONMENTImp
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Table of Contents (continued)Sectio
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Section 1General InformationModel N
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Section 1General InformationWarrant
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Section 2Installation InstructionsG
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Section 2Installation InstructionsQ
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Section 2Installation InstructionsE
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Section 2Installation InstructionsC
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Section 2Installation InstructionsI
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Section 3MaintenanceComponent Ident
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Maintenance Section 33. Shine a fla
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Maintenance Section 3CLEANING PROCE
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Maintenance Section 3AUTOMATIC CLEA
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Maintenance Section 3Water Dump Val
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Maintenance Section 3Water Level Pr
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Maintenance Section 3Water Treatmen
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Maintenance Section 3THIS PAGE INTE
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Ice Machine Sequence of Operation S
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Ice Machine Sequence of Operation S
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Water System Ice Making Sequence of
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Electrical System Section 6REMOTE M
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Electrical System Section 62. REFRI
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Electrical System Section 64. FREEZ
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Electrical System Section 66. HARVE
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Electrical System Section 6REMOTE M
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Electrical System Section 6Freeze S
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Electrical System Section 6Harvest
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Electrical System Section 6Automati
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Electrical System Section 6Q200/Q28
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Electrical System Section 6Q320 - S
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Electrical System Section 6Componen
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Electrical System Section 6COMPRESS
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Electrical System Section 6Q-Model
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Electrical System Section 6ICE/OFF/
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Electrical System Section 6GeneralQ
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Electrical System Section 6DIAGNOSI
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Electrical System Section 6Water Le
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Electrical System Section 6Problem:
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Electrical System Section 6Diagnosi
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Electrical System Section 6THIS PAG
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ICE MACHINES Q-Model Service Manual

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