Manitowoc
Manitowoc Manitowoc
ENERGIZED PARTS CHARTSM50Self-contained Ice MachinesSEQUENCE(Relay)Initial Start-up/Start-up afterAutomatic ShutoffRefrigerationSystem Start-upFreeze CycleHarvestAutomatic ShutoffWaterPump(1)onononoffoffWaterInletValve(2)ononoffonoffHarvestValve(3)ononoffonoffCompressor(4)offonononoffFanMotor(5)offonononoroffoffDuration175 seconds5 secondsAutomaticallydetermined*Automaticallydetermined*Until binthermostatRe-closes* Liquid line thermistor determines the length of the freeze andharvest cycles. Liquid line temperature also determines fan motoroperation during the harvest cycle.88 Part Number 80-01111-9 7/10
Operational ChecksQM45/Q130/Q170/Q210/Q270Siphon SystemTo reduce mineral build-up and cleaning frequency,the water in the sump trough must be purged duringeach harvest cycle.When the water pump de-energizes the level in thewater trough rises above the standpipe starting asiphon action. The siphon action stops when the waterlevel in the sump trough drops. When the siphonaction stops, the float valve refills the water trough tothe correct level.Follow steps 1 through 6 under water level check toverify the siphon system functions correctlyWater LevelCheck the water level while the ice machine is in theice mode and the water pump is running. The correctwater level is 1/4" (6.3 mm) to 3/8" (9.5 mm) below thetop of the standpipe, a line in the water troughindicates the correct level.SIPHON CAPSET THE WATER LEVEL TOTHE LINE IN THE WATERTROUGHSV1689-1Part Number 80-01111-9 7/10 89
- Page 38 and 39: ON/OFF/WASHTOGGLESWITCHCONDENSER AI
- Page 40 and 41: ON/OFF/WASHTOGGLESWITCHQM20 Ice Mac
- Page 42 and 43: WATERPUMPEVAPORATORWATERSHUTTERASSE
- Page 44 and 45: AIR-COOLED CONDENSERA dirty condens
- Page 46 and 47: Step 1 Set the toggle switch to the
- Page 48 and 49: D. Remove the Ice Thickness Probe
- Page 50 and 51: Disassembly• Twist both of the in
- Page 52 and 53: F. Remove the Float Valve• Turn t
- Page 54 and 55: H. Remove the ice damper.Q130• Gr
- Page 56 and 57: I. Remove the Bin Door• Grasp the
- Page 58 and 59: Step 12 Use 1/2 of the sanitizer/wa
- Page 60 and 61: QM20/QM30CLEANING AND SANITIZING PR
- Page 62 and 63: Step 6 Remove parts for cleaning.A.
- Page 64 and 65: Step 7 Mix a solution of cleaner an
- Page 66 and 67: Step 20 Use half of the sanitizer/w
- Page 68 and 69: 4. Wait until the Clean light flash
- Page 70 and 71: WATER SHUTTERSThe water shutter is
- Page 72 and 73: SUMP DRAIN OVERFLOW TUBE1. Remove c
- Page 74 and 75: SPRAY BAR, WATER PUMP AND HOSE! War
- Page 76 and 77: ! WarningWear ru bber gloves an d s
- Page 78 and 79: WATER-COOLED ICE MACHINES1. Perform
- Page 80 and 81: HARVEST SEQUENCE5. HarvestThe water
- Page 82 and 83: ICE MAKINGSEQUENCE OFOPERATIONHarve
- Page 84 and 85: HARVEST SEQUENCE4. Harvest CycleThe
- Page 86 and 87: SM50INITIAL START-UP OR START-UP AF
- Page 90 and 91: Water Level CheckThe float valve is
- Page 92 and 93: QM20/QM30Routine adjustments and ma
- Page 94 and 95: 5. Remove the two screws holding th
- Page 96 and 97: Clean (Green)Pressing the “Clean
- Page 98 and 99: This Page Intentionally Left Blank9
- Page 100 and 101: DIAGNOSING ICE THICKNESS CONTROLCIR
- Page 102 and 103: Ice Machine Cycles Into Harvest Bef
- Page 104 and 105: INSTALLATION AND VISUAL INSPECTIONC
- Page 106 and 107: ICE FORMATION PATTERNEvaporator ice
- Page 108 and 109: SAFETY LIMIT FEATUREIn addition to
- Page 110 and 111: Safety Limit Notes• A safety limi
- Page 112 and 113: Safety Limit ChecklistThe following
- Page 114 and 115: Safety Limit #2Harvest time exceeds
- Page 116 and 117: Discharge Pressure High ChecklistIm
- Page 118 and 119: ProcedureStep1. Determine the ice m
- Page 120 and 121: Suction Pressure Low ChecklistImpro
- Page 122 and 123: Hot Gas Valve AnalysisThe valve can
- Page 124 and 125: FindingsThe inlet of the harvestval
- Page 126 and 127: DISCHARGE LINE TEMPERATURE ANALYSIS
- Page 128 and 129: REFRIGERATION COMPONENT DIAGNOSTICC
- Page 130 and 131: FINAL ANALYSISThe column with the h
- Page 132 and 133: Q130/Q170/Q210/Q270 Ice Machines On
- Page 134 and 135: QM20/QM30DIAGNOSING AN ICE MACHINET
- Page 136 and 137: QM30The QM30 ice machines have a ve
ENERGIZED PARTS CHARTSM50Self-contained Ice MachinesSEQUENCE(Relay)Initial Start-up/Start-up afterAutomatic ShutoffRefrigerationSystem Start-upFreeze CycleHarvestAutomatic ShutoffWaterPump(1)onononoffoffWaterInletValve(2)ononoffonoffHarvestValve(3)ononoffonoffCompressor(4)offonononoffFanMotor(5)offonononoroffoffDuration175 seconds5 secondsAutomaticallydetermined*Automaticallydetermined*Until binthermostatRe-closes* Liquid line thermistor determines the length of the freeze andharvest cycles. Liquid line temperature also determines fan motoroperation during the harvest cycle.88 Part Number 80-01111-9 7/10