Manitowoc Ice S1800 service manual Refrigeration System Operational Analysis Tables

Page 84

Refrigeration System

 

 

 

Section 7

 

 

 

 

 

 

 

 

 

 

REFRIGERATION SYSTEM OPERATIONAL ANALYSIS TABLES

 

 

 

 

 

 

 

 

 

S Models Dual Expansion Valve - Ice Machine Model Number_________________

 

 

 

 

 

 

This table must be used with charts, checklists and other references to eliminate refrigeration

 

 

 

 

 

 

 

 

 

 

 

 

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

4

 

 

Ice Production

 

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 charted

 

 

 

 

 

 

 

capacity.

 

 

 

 

 

Installation and Water System

All installation and water related problems must be corrected before proceeding with chart.

 

 

 

Ice Formation Pattern

Ice formation is extremely

Ice formation is extremely

Ice formation normal

Ice formation normal

 

 

 

 

 

 

 

thin on outlet of evaporator

thin on outlet of one side of

-or-

-or-

 

Left Side__________________

-or-

evaporator

Ice formation is extremely

No ice formation on entire

 

No ice formation on the one

-or-

thin at inlet of one side of

evaporator

 

 

 

 

 

 

 

side of evaporator

No ice formation on entire

evaporator

 

 

 

Right Side_________________

 

evaporator

-or-

 

 

 

 

 

No ice formation on entire

 

 

 

 

 

 

 

 

 

 

 

evaporator

 

 

 

Safety Limits

 

 

 

 

 

 

 

Refer to “Analyzing Safety Limits” to

Stops on safety limit:

Stops on safety limit:

Stops on safety limit:

Stops on safety limit:

 

eliminate all non-refrigeration

1 or 2

1 or 2

1 or 2

1 or 2

 

problems.

 

 

 

 

 

 

 

 

 

 

Freeze Cycle

 

 

 

 

 

 

 

Discharge Pressure

 

If discharge pressure is High or Low refer to freeze cycle high or low discharge pressure problem checklist to eliminate

_____

______

______

problems and/or components not listed on this table before proceeding.

 

1 minute

Middle

End

 

 

 

 

 

 

 

into cycle

 

 

 

 

 

 

 

 

 

 

Freeze Cycle

 

If suction pressure is High or Low refer to freeze cycle high or low suction pressure problem checklist to eliminate

 

Suction Pressure

 

problems and/or components not listed on this table before proceeding.

_____

______

______

Suction pressure is

Suction pressure is

Suction pressure is

Suction pressure is

High

Low or Normal

High

High

 

1 minute

Middle

End

 

 

 

 

 

 

 

Wait 5 minutes into the freeze cycle.

One harvest valve inlet is

Both harvest valve inlets are

Both harvest valve inlets are

Both harvest valve inlets

 

Compare temperatures of

Hot

Cool enough to hold hand

Cool enough to hold hand

are Cool enough to hold

 

-and-

on

on

hand on

 

compressor discharge line

 

approaches the temperature

-and-

-and-

-and-

 

and both harvest valve inlets.

of a Hot compressor

the compressor discharge

the compressor discharge

the compressor discharge

 

 

 

 

 

 

 

discharge line.

line is Hot.

line is Cool

line is Hot.

 

 

 

 

 

 

 

 

 

enough to hold hand on.

 

 

 

Discharge Line Temperature

Discharge line temperature

Discharge line temperature

Discharge line temperature

Discharge line

 

Record freeze cycle discharge line

 

160°F (71.1°C)

160°F (71.1°C)

less than

temperature 160°F

 

temperature at the end of the freeze

 

or higher at the end of the

or higher at the end of the

160°F (71.1°C) at the end

(71.1°C) or higher at the

 

cycle

 

 

 

 

freeze cycle

freeze cycle

of the freeze cycle

end of the freeze cycle

 

 

_________°F (°C)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Final Analysis

 

 

Low On Charge

 

 

 

 

Enter total number of boxes checked

Harvest Valve Leaking

-Or-

TXV Flooding

Compressor

 

in each column.

 

 

TXV Starving

 

 

 

7-18

Part Number 80-1634-3

Page 83 Page 85
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Page 83 Page 85
Contents Service Manual Read These Before Proceeding Personal Injury PotentialTable of Contents Table of Contents Section Ice Machine Operation Section MaintenanceSection Before Calling For Service Table of Contents Section Electrical System Section Refrigeration SystemTable of Contents How to Read a Model Number Model NumbersIce Cube Sizes Self-Contained Water-CooledGeneral Information Section Accessories Section General Information Model/Serial Number Location Model/Serial Number LocationWarranty Coverage Ice Machine Dimensions Width, Depth, and Height DimensionsElectrical and AuCS Dimensions GeneralInstallation Instructions Section Location of Ice Machine Ice Machine Heat of RejectionS1800M Water-Cooled Series Heat of Rejection Ice Machine Air ConditioningSection Installation Instructions Electrical Service VoltageMinimum Circuit Ampacity Electrical RequirementsFor United Kingdom Only Self Contained ICE Machine 115/1/60 or 208-230/1/60Self Contained ICE Machine 208-230/3/60 Self Contained ICE Machine 230/1/50Cooling Tower Applications Water SupplyWater Inlet Lines Drain ConnectionsInstallation Instructions Section Typical Water Supply Drain InstallationWater Supply and Drain Line SIZING/CONNECTIONS CondenserSection Installation Instructions Installation Check List AuCS Automatic Cleaning System Potential Personal Injury SituationSection Ice Machine Operation Component IdentificationIce Machine Operation Section Sequence Of Operation Initial START-UP or START-UP After Automatic SHUT-OFFSafety Timers Harvest Sequence 5. Water PurgeHarvest Automatic SHUT-OFF 7. Automatic Shut-OffIce Machine Operation Section Operational Checks Water LevelICE Thickness Check Ice Thickness CheckWater Purge Adjustment Harvest Sequence Water PurgeIce Machine Operation Section This page Intentionally Left BlankExterior Cleaning Ice Machine InspectionWater-Cooled Condenser Water Regulating Valve AlphaSan→Maintenance Section Guardian InstallationSachet Replacement Frequency Sachet Replacement ProcedureSection Maintenance Interior Cleaning and Sanitizing Cleaning ProcedureModel Amount of Cleaner StepMaintenance Section Sanitizing ProcedureSolution Type Water Mixed With Sanitizer Removal of Parts for CLEANING/SANITIZING Solution Type Water Mixed WithWater Curtain Water Curtain Removal Ice Thickness ProbeIce Thickness Probe Removal Water Distribution Tube Water TroughWater Distribution Tube Removal Water Level Probe Water PumpWater Pump Removal Dump Valve Disassembly Water Dump ValveEvaporator Tray Removal Drain Line Check ValveWater Inlet Valve Maintenance Section Removal from Service/Winterization Pry Open the Water Regulating Valve AUCS→ AccessorySELF-CONTAINED WATER-COOLED ICE Machines Checklist Problem Possible Cause To CorrectBefore Calling For Service Section Safety Limit FeatureEnergized Parts Charts Section Electrical SystemSELF-CONTAINED WATER-COOLED Models SELF-CONTAINED Models Initial Start-Up or Start-Up After Automatic Shut-OffWater Purge Self-Contained Water PurgeRefrigeration System Start Up 5 Seconds Toggle Switch Refrigeration System START-UPSelf-Contained Refrigeration System Start-Up Electrical System Section Freeze SequencePRE-CHILL Self-Contained Pre-Chill Self-Contained ModelsToggle Switch Bin Switch Control Board Relays FreezeSelf-Contained Freeze Self-Contained Models Harvest Sequence Harvest Automatic Shut-Off Automatic SHUT-OFFSelf-Contained Automatic Shut-Off Section Electrical System Wiring Diagrams Wiring Diagram LegendS1800 SELF-CONTAINED 1 Phase Control BoardS1800 SELF-CONTAINED 3 Phase Specifications Check ProcedureBIN Switch Main FuseSymptoms Diagnostic AidsContinuity Test Water Curtain Removal NotesCompressor Electrical Diagnostics Check Resistance Ohm ValuesCheck Motor Windings to Ground Determine if the Compressor is SeizedPtcr Diagnostics What is a PTCR?Compressor Start Sequence Troubleshooting PTCR’s WHY a Good Ptcr MAY Fail To Start the CompressorModel Automatic Shut-Off and Restart During Start-Up First .25 1.0 SecondsChecking the Ptcr Manitowoc PtcrModel Manitowoc Cera-Mite Room Part NumberDiagnosing Start Components CapacitorRelay Relay Operation CheckICE/OFF/CLEAN Toggle Switch Switch Setting Terminals Ohm ReadingElectronic Control Board Control BoardSafety Limits InputsFreeze Time LOCK-IN Feature Ice Thickness Probe CleaningHOW the Probe Works Harvest LightDiagnosing ICE Thickness Control Circuitry Monitoring of Harvest Light CorrectionWater Inlet Valve Safety SHUT-OFF Electrical System Section Water Level Control CircuitryWater Level Probe Light Freeze Cycle CircuitryProblem Water Trough Overfilling During Freeze Cycle Diagnosing Water Level Control CircuitryWait until the freeze cycle starts On or OFF Step Check Self Contained 1 Phase with Terminal Board SELF-CONTAINED Water -COOLED Models Freeze Cycle Refrigeration SequenceRefrigeration System Section S1800 SELF-CONTAINED Tubing Schematic General Before Beginning Service Weights are in poundsICE Production Check Times are in minutesINSTALLATION/VISUAL Inspection Checklist Water System ChecklistPossible Problem Corrective Action ICE Formation Pattern Extremely Thin at Evaporator OutletNormal Ice Formation Extremely Thin at Evaporator Inlet No Ice FormationSafety Limits Safety Limit IndicationAnalyzing Why Safety Limits May Stop the Ice Machine Safety Limit Notes Possible Cause Check/CorrectSection Refrigeration System Procedure Freeze Cycle Discharge Pressure High ChecklistFreeze Cycle Discharge Pressure Low Checklist Analyzing Discharge Pressure During Freeze or Harvest CycleStep Example Using SY1004A Model Ice Machine Analyzing Suction Pressure During Freeze CycleFreeze Cycle Suction Pressure High Checklist Freeze Cycle Suction Pressure Low Checklist Harvest Valve Temperature Check General Harvest Valve Analysis Findings Comments Discharge Line Temperature Analysis General Final Analysis Column 1 Harvest Valve LeakingColumn 2 LOW CHARGE/TXV Starving Column 3 TXV FloodingRefrigeration System Operational Analysis Tables Models Dual Expansion Valve Ice Machine Model NumberHigh Pressure CUT-OUT Hpco Control S1800 Series Self-Contained Water-Cooled Cycle TimesHour Ice Production Operating PressuresSELF-CONTAINED RECOVERY/EVACUATION ConnectionsSelf-Contained Charging Procedures Charging ConnectionsSystem Contamination CLEAN-UP Determining Severity Of ContaminationMild System Contamination Cleanup Procedure Severe System Contamination Cleanup ProcedureSection Refrigeration System 10. Using Pinch-Off Tool FILTER-DRIERS Drier End Part Model Connection Size NumberTotal System Refrigerant Charges Series Version Charge S1800M48 oz Recover New Product SpecificationsRefrigerant Definitions RecycleRecovered or Recycled Refrigerant Refrigerant RE-USE PolicyNew Refrigerant Reclaimed RefrigerantHFC Refrigerant Questions and Answers This page Intentionally Left Blank Page Attend a Manitowoc Factory Service School
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