ICE MACHINES Q-Model Service Manual

More documents

Recommendations

Info

Refrigeration System Section 7HOW TO USE THE REFRIGERATION SYSTEMOPERATIONAL ANALYSIS TABLESGeneralThese tables must be used with charts, checklists andother references to eliminate refrigeration componentsnot listed on the tables and external items and problemswhich can cause good refrigeration components toappear defective.The tables list five different defects that may affect theice machine’s operation.NOTE: A low-on-charge ice machine and a starvingexpansion valve have very similar characteristics andare listed under the same column.NOTE: Before starting, see “Before Beginning <strong>Service</strong>”on Page 7-9 for a few questions to ask when talking tothe ice machine owner.ProcedureStep 1 Complete the “Operation Analysis” column.Read down the left “Operational Analysis” column.Perform all procedures and check all information listed.Each item in this column has supporting referencematerial to help analyze each step.While analyzing each item separately, you may find an“external problem” causing a good refrigerantcomponent to appear bad. Correct problems as they arefound. If the operational problem is found, it is notnecessary to complete the remaining procedures.Step 2 Enter check marks (√) in the small boxes.Each time the actual findings of an item in the“Operational Analysis” column matches the publishedfindings on the table, enter a check mark.Example: Freeze cycle suction pressure is determinedto be low. Enter a check mark in the “low” box.Step 3 Add the check marks listed under each of thefour columns. Note the column number with the highesttotal and proceed to “Final Analysis.”NOTE: If two columns have matching high numbers, aprocedure was not performed properly and/or supportingmaterial was not analyzed correctly.Final AnalysisThe column with the highest number of check marksidentifies the refrigeration problem.COLUMN 1 - HARVEST VALVE LEAKINGA leaking harvest valve must be replaced.COLUMN 2 - LOW CHARGE/TXV STARVINGNormally, a starving expansion valve only affects thefreeze cycle pressures, not the harvest cycle pressures.A low refrigerant charge normally affects both pressures.Verify the ice machine is not low on charge beforereplacing an expansion valve.1. Add refrigerant charge in 2 to 4 oz. increments as adiagnostic procedure to verify a low charge. If theproblem is corrected, the ice machine is low oncharge. Find the refrigerant leak.The ice machine must operate with the nameplatecharge. If the leak cannot be found, properrefrigerant procedures must still be followed Changethe liquid line drier. Then, evacuate and weigh in theproper charge.2. If the problem is not corrected by adding charge, theexpansion valve is faulty.On dual expansion valve ice machines, change onlythe TXV that is starving. If both TXV’s are starving,they are probably good, and are being affected bysome other malfunction, such as low charge.COLUMN 3 - TXV FLOODINGA loose or improperly mounted expansion valve bulbcauses the expansion valve to flood. Check bulbmounting, insulation, etc., before changing the valve. Ondual expansion valve machines, the service technicianshould be able to tell which TXV is flooding by analyzingice formation patterns. Change only the floodingexpansion valve.COLUMN 4 - COMPRESSORReplace the compressor and start components. Toreceive warranty credit, the compressor ports must beproperly sealed by crimping and soldering them closed.Old start components must be returned with the faultycompressor.7-24 Part No. 80-1100-3
Section 7Refrigeration SystemREFRIGERATION SYSTEM OPERATIONAL ANALYSIS TABLESQ, J and B <strong>Model</strong> Single Expansion ValveThis table must be used with charts, checklists and other references to eliminaterefrigeration components not listed on the table and external items and problems,which can cause good refrigeration components to appear defective.Operational Analysis 1 2 3 4Ice ProductionInstallation and WaterSystemIce Formation PatternSafety LimitsRefer to “Analyzing SafetyLimits” to eliminate all nonrefrigerationproblems.Freeze CycleDischarge Pressure_____ ______ ______1 minute Middle Endinto cycleFreeze CycleSuction Pressure_____ ______ ______1 minute Middle EndWait 5 minutes into the freezecycle.Compare temperatures ofevaporator inlet andevaporator outlet.Inlet ____ ° F (° C)Outlet ____ ° F (° C)Difference ____ ° F (° C)Wait 5 minutes into the freezecycle.Compare temperatures ofcompressor discharge lineand harvest valve inlet.Discharge Line TemperatureRecord freeze cycle dischargeline temperature at the end ofthe freeze cycle_________°F (°C)Air-Temperature Entering Condenser_____________Water Temperature Entering Ice Machine_________Published 24 hour ice production________________Calculated (actual) ice production_______________NOTE: The ice machine is operating properly if the ice fill patterns is normal and ice production is within 10% of chartedcapacity.All installation and water related problems must be corrected before proceeding with chart.Ice formation is extremelythin on outlet of evaporator-or-No ice formation on theentire evaporatorStops on safety limit:1Ice formation is extremelythin on outlet of evaporator-or-No ice formation on entireevaporatorStops on safety limit:1Ice formation normal-or-Ice formation is extremelythin on inlet of evaporator-or-No ice formation on entireevaporatorStops on safety limit:1 or 2Ice formation normal-or-No ice formation on entireevaporatorStops on safety limit:1If discharge pressure is High or Low refer to freeze cycle high or low discharge pressure problem checklist to eliminateproblems and/or components not listed on this table before proceeding.If suction pressure is High or Low refer to freeze cycle high or low suction pressure problem checklist to eliminate problemsand/or components not listed on this table before proceeding.Suction pressure is HighInlet and outletwithin 7°of each otherThe harvest valve inlet isHot-andapproachesthe temperatureof a Hot compressordischarge line.Discharge line temperature160°F (71.1°C)or higherat the end of the freezecycleSuction pressure is Low orNormalInlet and outletnot within 7°of each other-and-Inlet is colder than outletThe harvest valve inlet isCool enough to hold handon-andthecompressor dischargeline is Hot.Discharge line temperature160°F (71.1°C)or higherat the end of the freezecycleSuction pressure is HighInlet and outletwithin 7°of each other-or-Inlet and outletnot within 7°of each other-and-Inlet is warmer than outletThe harvest valve inlet isCool enough to hold handon-andthecompressor dischargeline is Coolenough to hold hand on.Discharge line temperatureless than160°F (71.1°C)at the end of the freezecycleSuction pressure is HighInlet and outletwithin 7°of each otherThe harvest valve inlet isCool enough to hold handon-andthecompressor dischargeline is Hot.Discharge line temperature160°F (71.1°C)or higher at the end of thefreeze cycleFinal AnalysisEnter total number of boxeschecked in each column.Harvest Valve LeakingLow On Charge-Or-TXV StarvingTXV FloodingCompressorPart No. 80-1100-3 7-25
Page 2:
Safety NoticesAs you work on a Q-Se
Page 5 and 6:
Table of ContentsSection 1General I
Page 7 and 8:
HEALTH, SAFETY & THE ENVIRONMENTImp
Page 9 and 10:
Table of Contents (continued)Sectio
Page 11 and 12:
Section 1General InformationModel N
Page 13 and 14:
Section 1General InformationWarrant
Page 15 and 16:
Section 2Installation InstructionsG
Page 17 and 18:
Section 2Installation InstructionsQ
Page 19 and 20:
Section 2Installation InstructionsL
Page 21 and 22:
Section 2Installation InstructionsE
Page 23 and 24:
Section 2Installation InstructionsS
Page 25 and 26:
Section 2Installation InstructionsW
Page 27 and 28:
Section 2Installation InstructionsR
Page 29 and 30:
Section 2Installation InstructionsC
Page 31 and 32:
Section 2Installation InstructionsR
Page 33 and 34:
Section 2Installation InstructionsI
Page 35:
Section 3MaintenanceComponent Ident
Page 38 and 39:
Maintenance Section 33. Shine a fla
Page 40 and 41:
Maintenance Section 3CLEANING PROCE
Page 42 and 43:
Maintenance Section 3AUTOMATIC CLEA
Page 44 and 45:
Maintenance Section 3Water Dump Val
Page 46 and 47:
Maintenance Section 3Water Level Pr
Page 48 and 49:
Maintenance Section 3Water Treatmen
Page 50 and 51:
Maintenance Section 3THIS PAGE INTE
Page 52 and 53:
Ice Machine Sequence of Operation S
Page 54 and 55:
Ice Machine Sequence of Operation S
Page 56 and 57:
Water System Ice Making Sequence of
Page 58 and 59:
Electrical System Section 6REMOTE M
Page 60 and 61:
Electrical System Section 62. REFRI
Page 62 and 63:
Electrical System Section 64. FREEZ
Page 64 and 65:
Electrical System Section 66. HARVE
Page 66 and 67:
Electrical System Section 6REMOTE M
Page 68 and 69:
Electrical System Section 6Freeze S
Page 70 and 71:
Electrical System Section 6Harvest
Page 72 and 73:
Electrical System Section 6Automati
Page 74 and 75:
Electrical System Section 6Q200/Q28
Page 76 and 77:
Electrical System Section 6Q320 - S
Page 78 and 79:
Page 80 and 81:
Page 82 and 83:
Page 84 and 85:
Page 86 and 87: Electrical System Section 6Q450/Q60
Page 94 and 95: Electrical System Section 6Componen
Page 96 and 97: Electrical System Section 6COMPRESS
Page 98 and 99: Electrical System Section 6Q-Model
Page 100 and 101: Electrical System Section 6ICE/OFF/
Page 102 and 103: Electrical System Section 6GeneralQ
Page 104 and 105: Electrical System Section 6DIAGNOSI
Page 106 and 107: Electrical System Section 6Water Le
Page 108 and 109: Electrical System Section 6Problem:
Page 110 and 111: Electrical System Section 6Diagnosi
Page 112 and 113: Electrical System Section 6THIS PAG
Page 114 and 115: Refrigeration System Section 7EVAPO
Page 116 and 117: Refrigeration System Section 7EVAPO
Page 118 and 119: Refrigeration System Section 7Q1300
Page 120 and 121: Refrigeration System Section 7Opera
Page 122 and 123: Refrigeration System Section 7INSTA
Page 124 and 125: Refrigeration System Section 73. Ex
Page 126 and 127: Refrigeration System Section 7Analy
Page 128 and 129: Refrigeration System Section 7Safet
Page 130 and 131: Refrigeration System Section 7ANALY
Page 132 and 133: Refrigeration System Section 7SINGL
Page 134 and 135: Refrigeration System Section 7DISCH
Page 138 and 139: Refrigeration System Section 7Q and
Page 140 and 141: Refrigeration System Section 7FREEZ
Page 142 and 143: Refrigeration System Section 7HEADM
Page 144 and 145: Refrigeration System Section 7Press
Page 160 and 161: Refrigeration System Section 7Self-
Page 162 and 163: Refrigeration System Section 7HEAT
Page 164 and 165: Refrigeration System Section 7HEAT
Page 166 and 167: Refrigeration System Section 7Mild
Page 168 and 169: Refrigeration System Section 7SV140
Page 170 and 171: Refrigeration System Section 7REFRI
Page 172 and 173: Refrigeration System Section 7HFC R
Page 174 and 175: Refrigeration System Section 7THIS
show all

ICE MACHINES Q-Model Service Manual

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?