Manitowoc Ice S1800 Refrigeration System START-UP, Self-Contained Refrigeration System Start-Up

Page 41

Section 6

Electrical System

 

 

2.REFRIGERATION SYSTEM START-UP

The compressor starts after the 45- second water purge, and it remains on throughout the Freeze and Harvest cycles.

The water fill valve is energized at the same time as the compressor.

The harvest valve(s) remains on for the first 5 seconds of the initial compressor start-up and then shuts off.

At the same time the compressor starts, the condenser fan motor (air- cooled models) is supplied with power throughout the entire freeze and harvest sequences.

The fan motor is wired through a fan cycle pressure control, and may cycle on and off. (The compressor and the condenser fan motor are wired through the contactor. Any time the contactor coil is energized, the compressor and fan motor are supplied with power.)

L1

 

 

 

 

L2 or N

Ground

 

 

 

 

 

 

 

Water Valve

(99)

 

 

 

 

 

 

 

(20)

(21)

 

(89)

(55)

 

 

(61)

(22)

 

 

High

 

 

 

Control Board

 

Harvest Valve

 

 

Pressure

 

 

 

(2)

 

 

(88)

Cutout

(60)

(77)

 

(6)

 

 

 

(80)

 

 

 

(5)

 

Dump Valve

(75)

 

 

(1)

 

(76)

 

 

(7)

 

(81)

 

 

 

(4)

(57)

Water Pump

 

 

 

 

(98)

 

 

 

 

 

 

 

(42)

Trans.

 

 

 

Fuse (7a)

(58)

Terminates at

 

 

 

Pin Connection

 

 

 

 

 

 

(59)

 

 

 

L2

 

 

Contactor Coil

 

 

 

(25)

 

 

(56)

 

 

 

 

(26)

 

Air Compressor

 

 

 

 

 

 

Ice Thickness

 

(9)

 

 

 

(74)

Probe

 

(8)

 

 

Water Level Probe

 

 

 

Bin Switch

 

Low DC

 

(6)

 

 

 

 

 

 

 

 

 

Voltage

 

(1)

 

Clean

 

 

Plug

 

 

 

 

 

 

 

 

OFF

 

 

 

 

(2)

 

ICE

 

 

(Red)

 

 

 

 

 

 

 

 

 

 

 

Compressor

 

 

Run Capacitor

 

 

(Yellow)

(46)

Contactor

Overload

 

 

 

 

 

(50)

Contacts (Black)

 

 

 

 

 

 

 

 

 

 

 

L1

 

 

 

 

 

(45)

(51)

(85)

(86)

 

 

PTCR

 

Fan Motor

 

Fan Cycle

 

 

 

 

 

 

 

Control

 

 

 

 

Run Capacitor

SV3137-4

 

Self-Contained — Refrigeration System Start-Up

Table 6-2. Self-Contained Models

 

 

 

 

 

2. Refrigeration System Start Up (5 Seconds)

 

Toggle Switch

ICE

Bin Switch

Closed

Control Board Relays

 

#1

Water Pump

OFF

#2

Harvest Valve (Left)

ON

#3

Harvest Valve (Right)

ON (When Used)

#4

Air Compressor

ON (When Used)

#5

Water Inlet Valve

ON

#6

Water Dump Valve

OFF

#7

Contactor Coil

Closed / ON

#7A

Compressor

ON

#7B

Condenser Fan Motor

OFF

Safety Controls (Which could stop ice machine operation)

 

 

High Pressure Cut-Out

Closed

 

Main Fuse (On Control Board)

Closed

Part Number 80-1634-3

6-3

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Page 40 Page 42
Contents Service Manual Personal Injury Potential Read These Before ProceedingTable of Contents Section Before Calling For Service Table of Contents Section Ice Machine OperationSection Maintenance Section Refrigeration System Table of Contents Section Electrical SystemTable of Contents Model Numbers How to Read a Model NumberIce Cube Sizes Self-Contained Water-CooledGeneral Information Section Accessories Model/Serial Number Location Section General Information Model/Serial Number LocationWarranty Coverage Width, Depth, and Height Dimensions Ice Machine DimensionsElectrical and AuCS Dimensions GeneralIce Machine Heat of Rejection Installation Instructions Section Location of Ice MachineS1800M Water-Cooled Series Heat of Rejection Ice Machine Air ConditioningVoltage Section Installation Instructions Electrical ServiceMinimum Circuit Ampacity Electrical RequirementsSelf Contained ICE Machine 115/1/60 or 208-230/1/60 For United Kingdom OnlySelf Contained ICE Machine 208-230/3/60 Self Contained ICE Machine 230/1/50Water Supply Cooling Tower ApplicationsWater Inlet Lines Drain ConnectionsTypical Water Supply Drain Installation Installation Instructions SectionWater Supply and Drain Line SIZING/CONNECTIONS CondenserSection Installation Instructions Installation Check List Potential Personal Injury Situation AuCS Automatic Cleaning SystemComponent Identification Section Ice Machine OperationInitial START-UP or START-UP After Automatic SHUT-OFF Ice Machine Operation Section Sequence Of OperationHarvest Sequence 5. Water Purge Safety TimersHarvest Automatic SHUT-OFF 7. Automatic Shut-OffWater Level Ice Machine Operation Section Operational ChecksICE Thickness Check Ice Thickness CheckHarvest Sequence Water Purge Water Purge AdjustmentThis page Intentionally Left Blank Ice Machine Operation SectionIce Machine Inspection Exterior CleaningWater-Cooled Condenser Water Regulating Valve AlphaSan→Installation Maintenance Section GuardianSachet Replacement Frequency Sachet Replacement ProcedureCleaning Procedure Section Maintenance Interior Cleaning and SanitizingModel Amount of Cleaner StepSolution Type Water Mixed With Sanitizer Maintenance SectionSanitizing Procedure Solution Type Water Mixed With Removal of Parts for CLEANING/SANITIZINGIce Thickness Probe Removal Water CurtainWater Curtain Removal Ice Thickness Probe Water Distribution Tube Removal Water Distribution TubeWater Trough Water Pump Removal Water Level ProbeWater Pump Water Dump Valve Dump Valve DisassemblyDrain Line Check Valve Evaporator Tray RemovalWater Inlet Valve SELF-CONTAINED WATER-COOLED ICE Machines Maintenance Section Removal from Service/WinterizationPry Open the Water Regulating Valve AUCS→ Accessory Problem Possible Cause To Correct Checklist Safety Limit Feature Before Calling For Service SectionSELF-CONTAINED WATER-COOLED Models Energized Parts ChartsSection Electrical System Initial Start-Up or Start-Up After Automatic Shut-Off SELF-CONTAINED ModelsWater Purge Self-Contained Water PurgeSelf-Contained Refrigeration System Start-Up Refrigeration System Start Up 5 Seconds Toggle SwitchRefrigeration System START-UP Freeze Sequence Electrical System SectionPRE-CHILL Self-Contained Pre-Chill Self-Contained ModelsSelf-Contained Freeze Self-Contained Models Toggle Switch Bin Switch Control Board RelaysFreeze Harvest Sequence Harvest Self-Contained Automatic Shut-Off Automatic Shut-OffAutomatic SHUT-OFF Wiring Diagram Legend Section Electrical System Wiring DiagramsControl Board S1800 SELF-CONTAINED 1 PhaseS1800 SELF-CONTAINED 3 Phase Check Procedure SpecificationsBIN Switch Main FuseDiagnostic Aids SymptomsContinuity Test Water Curtain Removal NotesCheck Resistance Ohm Values Compressor Electrical DiagnosticsCheck Motor Windings to Ground Determine if the Compressor is SeizedCompressor Start Sequence Ptcr DiagnosticsWhat is a PTCR? WHY a Good Ptcr MAY Fail To Start the Compressor Troubleshooting PTCR’sModel Automatic Shut-Off and Restart During Start-Up First .25 1.0 SecondsManitowoc Ptcr Checking the PtcrModel Manitowoc Cera-Mite Room Part NumberCapacitor Diagnosing Start ComponentsRelay Relay Operation CheckSwitch Setting Terminals Ohm Reading ICE/OFF/CLEAN Toggle SwitchControl Board Electronic Control BoardInputs Safety LimitsIce Thickness Probe Cleaning Freeze Time LOCK-IN FeatureHOW the Probe Works Harvest LightMonitoring of Harvest Light Correction Diagnosing ICE Thickness Control CircuitryElectrical System Section Water Level Control Circuitry Water Inlet Valve Safety SHUT-OFFWater Level Probe Light Freeze Cycle CircuitryWait until the freeze cycle starts Problem Water Trough Overfilling During Freeze CycleDiagnosing Water Level Control Circuitry On or OFF Step Check Self Contained 1 Phase with Terminal Board Freeze Cycle Refrigeration Sequence SELF-CONTAINED Water -COOLED ModelsRefrigeration System Section S1800 SELF-CONTAINED Tubing Schematic General Weights are in pounds Before Beginning ServiceICE Production Check Times are in minutesPossible Problem Corrective Action INSTALLATION/VISUAL Inspection ChecklistWater System Checklist Normal Ice Formation ICE Formation PatternExtremely Thin at Evaporator Outlet No Ice Formation Extremely Thin at Evaporator InletAnalyzing Why Safety Limits May Stop the Ice Machine Safety LimitsSafety Limit Indication Possible Cause Check/Correct Safety Limit NotesSection Refrigeration System Freeze Cycle Discharge Pressure High Checklist ProcedureFreeze Cycle Discharge Pressure Low Checklist Analyzing Discharge Pressure During Freeze or Harvest CycleAnalyzing Suction Pressure During Freeze Cycle Step Example Using SY1004A Model Ice MachineFreeze Cycle Suction Pressure Low Checklist Freeze Cycle Suction Pressure High ChecklistFindings Comments Harvest Valve Temperature Check GeneralHarvest Valve Analysis Discharge Line Temperature Analysis General Column 1 Harvest Valve Leaking Final AnalysisColumn 2 LOW CHARGE/TXV Starving Column 3 TXV FloodingModels Dual Expansion Valve Ice Machine Model Number Refrigeration System Operational Analysis TablesHigh Pressure CUT-OUT Hpco Control Self-Contained Water-Cooled Cycle Times S1800 SeriesHour Ice Production Operating PressuresConnections SELF-CONTAINED RECOVERY/EVACUATIONCharging Connections Self-Contained Charging ProceduresDetermining Severity Of Contamination System Contamination CLEAN-UPSevere System Contamination Cleanup Procedure Mild System Contamination Cleanup ProcedureSection Refrigeration System 10. Using Pinch-Off Tool Drier End Part Model Connection Size Number FILTER-DRIERS48 oz Total System Refrigerant ChargesSeries Version Charge S1800M New Product Specifications RecoverRefrigerant Definitions RecycleRefrigerant RE-USE Policy Recovered or Recycled RefrigerantNew Refrigerant Reclaimed RefrigerantHFC Refrigerant Questions and Answers This page Intentionally Left Blank Page Attend a Manitowoc Factory Service School
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