Manitowoc EC18 Technician's Handbook
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Manitowoc EC18 Technician's Handbook

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Manitowoc
EC Models
Technician's Handbook
This manual is updated as new information and models
are released. Visit our website for the latest manual.
www.manitowocice.com
America's #1 Selling Ice Machine
Manitowoc Ice P/N 80-1520-3 9/10

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  • Page 1 Manitowoc EC Models Technician’s Handbook This manual is updated as new information and models are released. Visit our website for the latest manual. www.manitowocice.com America’s #1 Selling Ice Machine Manitowoc Ice P/N 80-1520-3 9/10...
  • Page 3 Safety Notices When using or servicing these Ice Machines, be sure to pay close attention to the safety notices in this handbook. Disregarding the notices may lead to serious injury and/or damage to the ice machine. Throughout this handbook, you will see the following types of safety notices: Warning Text in a Warning box alerts you to a potential...
  • Page 4 Procedural Notices When using or servicing these Ice Machines, be sure to read the procedural notices in this handbook. These notices supply helpful information that may assist you as you work. Throughout this handbook, you will see the following types of procedural notices: Important Text in an Important box provides you with information that may help you perform a procedure...
  • Page 5 ! Caution Proper installation, care and maintenance are essential for maximum ice production and trouble free operation of your Manitowoc Ice Machine. If you encounter problems not covered by this manual, do not proceed, contact Manitowoc Ice, Inc. We will be happy to provide assistance.
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  • Page 7: Table Of Contents

    Table of Contents General Information Model Numbers ......1 Installation Location of Ice Machine ..... 3 Water Service/Drains .
  • Page 8 Troubleshooting All Models ....... . 31 Ice Machine Will Not Run ....31 Compressor Won’t Run .
  • Page 9 Component Check Procedures On/Off/Wash-Fill Toggle Switch ... . . 63 Bin Thermostat ......64 Evaporator Thermostat.
  • Page 10 Refrigerant Pressure Charts EC18 Self-Contained Air-Cooled — Standard Cube ........90 EC20 (With Timer) Self-Contained Air-Cooled —...
  • Page 11 Tubing Schematics ..... . . 166 EC18/EC20/EC30/EC40 Tubing Schematic. . . 166 EC50/EC65/EC80 Tubing Schematic..167...
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  • Page 13: General Information

    General Information Model Numbers This manual covers the following models: Self-Contained Water-Cooled Air-Cooled ECS018A ECS020A ECS020W ECG020A ECG020W ECS030A ECS030W ECG030A ECG030W ECS040A ECS040W ECG040A ECG040W ECS050A ECS050W ECG050A ECG050W ECS065A ECS065W ECG065A ECG065W ECS080A ECS080W ECG080A ECG080W –1–...
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  • Page 15: Installation

    Installation Location of Ice Machine The location selected for the ice machine must meet the following criteria. If any of these criteria are not met, select another location.  The location must be indoors.  The location must be free of airborne and other contaminants.

  • Page 16: Water Service/Drains

    WATER SERVICE/DRAINS Water Supply Local water conditions may require treatment of the water to inhibit scale formation, filter sediment, and remove chlorine odor and taste. Water Inlet Lines  Do not connect the ice machine to a hot water supply. Be sure all hot water restrictors installed for other equipment are working.

  • Page 17: Electrical Requirements

    ELECTRICAL REQUIREMENTS Voltage The maximum allowable voltage variation is ±6% of the rated voltage on the ice machine model/serial number plate at start-up (when the electrical load is highest). All ice machines are factory pre-wired with a power cord only, no plug is supplied. Fuse/Circuit Breaker A separate fuse/circuit breaker must be provided for each ice machine.

  • Page 18: Electrical Specifications

    Voltage Max. Fuse/ Total Total Machine Phase Circuit Phase Circuit Amps Amps Cycle Breaker Cycle Breaker 115/60/1 EC18 230/50/1 10 amp 230/60/1 10 amp 115/60/1 115/60/1 EC20 230/50/1 10 amp 230/50/1 10 amp 230/60/1 10 amp 230/60/1 10 amp 115/60/1...
  • Page 19 115/60/1 115/60/1 EC50 230/50/1 10 amp 230/50/1 10 amp 230/60/1 10 amp 230/60/1 10 amp 115/60/1 115/60/1 EC65 230/50/1 10 amp 230/50/1 10 amp 230/60/1 10 amp 230/60/1 10 amp 115/60/1 115/60/1 EC80 230/50/1 10 amp 230/50/1 10 amp 230/60/1 10 amp 230/60/1 10 amp...

  • Page 20: Power Consumption - Kwh Per 24 Hours

    POWER CONSUMPTION - KWH PER 24 HOURS Air Temp/Water Temp Model 25/15 32/21 43/32 ECS18A ECS20A ECG20A 10.5 ECS20W ECG20W ECS30A 10.0 10.4 11.1 ECG30A ECS30W ECG30W ECS40A 11.1 11.6 12.3 ECG40A 11.0 11.5 12.2 ECS40W ECG40W Part Number 80-1479-3 10/10...
  • Page 21 POWER CONSUMPTION - KWH PER 24 HOURS Air Temp/Water Temp Model 25/15 32/21 43/32 ECS50A 12.9 13.3 14.4 ECG50A 12.6 13.0 14.0 ECS50W 11.1 11.2 11.5 ECG50W 11.0 10.9 11.4 ECS65A 12.6 13.1 14.1 ECG65A 12.9 13.2 14.1 ECS65W 11.2 11.3 11.7 ECG65W...

  • Page 22: Ice Machine Heat Of Rejection

    ICE MACHINE HEAT OF REJECTION Heat of Rejection Series Ice Machine Air Conditioning Peak EC18 1,150 2,300 EC20 1,400 2,600 EC30 1,900 3,300 EC40 2,100 4,100 EC50 2,600 5,000 EC65 2,900 5,000 EC80 4,300 7,400 BTU/Hour Because the heat of rejection varies during the ice making cycle, the figure shown is an average.

  • Page 23: Component Identification

    Component Identification Water Curtains Water Trough Evaporator Thermostat Air Cooled Condenser On/Off/Wash-Fill Thermostat Toggle Switch Part Number 80-1479-3 10/10...
  • Page 24 Ice Chute Evaporator Spray Bar Spray Nozzles Toggle Switch Part Number 80-1479-3 10/10...

  • Page 25: Component Removal

    COMPONENT REMOVAL Top Cover For easiest access to the evaporator compartment, the top cover can be removed. 1. Remove two screws on the rear of the ice machine. 2. Slide top cover back to disengage the three pins from the front panel Remove 2 Screws and Slide Cover Back Part Number 80-1479-3 10/10...
  • Page 26 Bin Door Allows access to the storage bin. 1. Remove top cover. 2. Slide door up until rear pins align with slot in door tracks. 3. Lift rear door pins out and slide door up until front door pins align with slot. 4.
  • Page 27 Water Curtain The water curtain is designed to keep the spraying water from escaping the evaporator compartment. Removal of the bin door is not required, but enhances access. 1. Grasp one end of the ice curtain and lift up. 2. Pivot water curtain and disengage remaining end. 3.
  • Page 28 Ice Chute The ice chute is positioned over the spray nozzles and allows the ice to easily fall into the bin. It must be firmly positioned over the Spray Bar Assembly, with the front edge inside the water trough or the spray nozzles will not be aligned with the spray holes, and spray water will fall into bin.

  • Page 29: Spray Bar

    SPRAY BAR The spray bar supplies water to the individual ice- making cups. Water from the Water Pump sprays through the nozzles, located on the upper portion of the tubes. 1. Grasp one end of the spray bar, lift up and remove from seat formed in water trough.
  • Page 30 Sump Drain Overflow Tube The sump drain overflow tube is located in the evaporator water sump. 1. Remove shutters and ice chute. 2. Lift spray bar or disconnect and remove for easiest access. 3. Pull up on over flow tube to remove. To replace plug, insert in hole, and push with force to make a tight seal Overflow Tube...

  • Page 31: Maintenance

    Maintenance INTERIOR CLEANING AND SANITIZING GENERAL Clean and sanitize the ice machine every six months for efficient operation. If the ice machine requires more frequent cleaning and sanitizing, consult a qualified service company to test the water quality and recommend appropriate water treatment. An extremely dirty ice machine must be taken apart for cleaning and sanitizing.

  • Page 32: Cleaning & Sanitizing Procedure

    CLEANING & SANITIZING PROCEDURE Ice machine cleaner is used to remove lime scale or other mineral deposits. Sanitizer is used to remove algae or slime. Step 1 Mix 4 liters of water with 500 ml of cleaner in a plastic or stainless container. Cleaner Water 500 ml (16 oz)
  • Page 33 Step 6 While components are soaking; use nylon brush to scrub inside of ice bin. Scrub inside of door, door track, bin, sump trough, and evaporator moldings. With clean water, rinse all of these areas thoroughly. Step 7 Replace sump overflow tube and pour remaining 2 liters of mixture into the water sump.
  • Page 34 Step 13 Remove Water Curtain and Ice Chute. Step 14 Take all components to sink and with 10 liters Sanitizer/Water mixture sanitize all components with a soft nylon brush or cloth. Do not rinse components. Step 15 Use brush or cloth to sanitize the inside of ice bin.
  • Page 35 EXTERIOR CLEANING Clean the area around the ice machine as often as necessary to maintain cleanliness and efficient operation. Sponge any dust and dirt off the outside of the ice machine with mild soap and water. Wipe dry with a clean, soft cloth.
  • Page 36 WATER-COOLED ICE MACHINES 1. Perform steps 1-6 under “Air-Cooled Ice Machines.” 2. Disconnect the incoming water and drain lines from the water-cooled condenser. 3. Insert a large screwdriver between the bottom spring coils of the water regulating valve. Pry upward to open the valve. 4.

  • Page 37: Operation

    Operation Sequence Of Operation Initial Start-Up PRIMING WATER SYSTEM Models built July 2010 or later: Place the toggle switch in the wash/fill position, the water fill valve and water pump energize. Wait 90 seconds for the water system to fill, then place the toggle switch in the ice position.
  • Page 38 1. Freeze Cycle Turn the toggle switch to ON. The compressor, and water pump will energize, starting the freeze cycle. The pump sprays water into the inverted cups. The water freezes layer by layer, until an ice cube forms in each cup.
  • Page 39 2. Harvest Cycle The compressor continues to operate and the water pump is de-energized. The hot gas valve energizes, allowing hot gas to enter and warm the evaporator. The water valve is also energized, aiding with harvest, as well as filling up the sump with fresh water for a new freeze cycle.

  • Page 40: Ice Cube Thickness Check

    ICE CUBE THICKNESS CHECK The ice cube thickness is factory-set to maintain the ice cube thickness at the proper size and weight. Allow the ice machine to operate for three complete cycles. The cubes should have a small dimple in the center.

  • Page 41: Cube Shape

    CUBE SHAPE The standard cube has an average weight of 19 grams, and the large cube has an average weight of 32 grams. Notice the normal dimple in the center of the cube. Part Number 80-1479-3 10/1029...
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  • Page 43: Troubleshooting

    Troubleshooting All Models ICE MACHINE WILL NOT RUN Nothing on the ice machine will operate (compressor, water pump, condenser fan motor). If any component runs this procedure can be skipped, move on to the next diagnostics (water pump won’t run, compressor won’t run, etc).

  • Page 44: Compressor Won't Run

    COMPRESSOR WON’T RUN If the water pump is running and the compressor is not, it may be tripping on overload or tripping the breaker/fuse. Check for grounded winding if breaker keeps tripping. 1. Toggle switch terminals 5 & 4 closed? (wires #49 &...

  • Page 45: Compressor Electrical Diagnostics

    COMPRESSOR ELECTRICAL DIAGNOSTICS The compressor does not start or will trip repeatedly on overload. Check Resistance (OHM) Values NOTE: Compressor windings can have very low ohm values. Use a properly calibrated meter. Perform the resistance test after the compressor cools. The compressor dome should be cool enough to touch (below 49°C) to assure that the overload is closed and the resistance readings will be accurate.
  • Page 46 Compressor Drawing High Amps The continuous amperage draw on start-up should not be near the maximum fuse size indicated on the serial tag. The wiring must be correctly sized to minimize voltage drop at compressor start-up. The voltage when the compressor is trying to start must be within (6% of the nameplate voltage).

  • Page 47: Diagnosing Start Components

    DIAGNOSING START COMPONENTS If the compressor attempts to start, or hums and trips the overload protector, check the start components before replacing the compressor. Capacitor Visual evidence of capacitor failure can include a bulged terminal end or a ruptured membrane. Do not assume a capacitor is good if no visual evidence is present.

  • Page 48: No Timer Models

    No Timer Models WATER PUMP WON’T RUN No Timer Models 1. Toggle switch terminals 2 & 1 closed? (wires #64 & #3) 2. Evaporator thermostat C & L contacts closed? (wires #3 & #5) 3. Water pump winding closed? (64) (65) TOGGLE SWITCH WATER...

  • Page 49: Hot Gas Valve Won't Energize

    HOT GAS VALVE WON’T ENERGIZE No Timer Models 1. Verify the evaporator temperature is below setpoint, then refer to evaporator thermostat check procedure to verify the evaporator thermostat is operating correctly. 2. Line voltage at hot gas valve? (Wires 6& 7) ...

  • Page 50: Water Inlet Valve Won't Energize

    WATER INLET VALVE WON’T ENERGIZE No Timer 1. Line voltage at water inlet valve? (Wires 21 & 22)  Yes - Replace water inlet valve coil.  No - Refer to evaporator thermostat diagnostics. HOT GAS EVAP THERMOSTAT SOLENOID (21) (10) (22) WATER INLET...

  • Page 51: Ice Machine Prematurely Harvests

    ICE MACHINE PREMATURELY HARVESTS No Timer 1. Line voltage at hot gas valve? Yes - Replace hot gas valve. No - Refer to evaporator thermostat diagnostics. HOT GAS EVAP THERMOSTAT SOLENOID (21) (10) (22) WATER INLET SOLENOID Part Number 80-1479-3 10/10...

  • Page 52: Ice Machine Will Not Harvest

    ICE MACHINE WILL NOT HARVEST No Timer 1. Evaporator temperature below setpoint? 2. Evaporator thermostat cap tube inserted correctly? (Flush with end of bulb well) 3. Evaporator thermostat closed? (wires #4 & timer motor) 4. Line voltage at hot gas valve and water inlet Solenoid? HOT GAS EVAP THERMOSTAT...

  • Page 53: Mechanical Timer Models

    Mechanical Timer Models WATER PUMP WON’T RUN Mechanical Timer 1. Toggle switch terminals 2 & 1 closed? (wires #64 & #3) 2. Timer micro switch closed (relay 2)? (wires #33 & #5) 3. Water pump winding closed? Part Number 80-1479-3 10/10...

  • Page 54: Hot Gas Valve Won't Energize

    HOT GAS VALVE WON’T ENERGIZE Mechanical Timer 1. Toggle switch terminals 2 & 1 closed? (wires #64 & #3) 2. Timer micro switch closed (relay 1)? (wires #3 & #6) 3. Hot gas valve coil winding closed? Part Number 80-1479-3 10/10...

  • Page 55: Water Inlet Valve Won't Energize

    WATER INLET VALVE WON’T ENERGIZE Mechanical Timer The hot gas valve and water inlet valve energize together in the harvest cycle. If the hot gas valve energizes verify #1 and then go right to #4. 1. Water supplied to the ice machine? 2.

  • Page 56: Ice Machine Prematurely Harvests

    ICE MACHINE PREMATURELY HARVESTS Mechanical Timer 1. Evaporator thermostat correctly set? 2. Timer micro switch relays in N.O. position? (wires #3 & #6-16 open - wires #33 & #4-5 closed) 3. Evaporator thermostat terminals #2 & #3 (Common) open? 4. Timer motor winding closed? 5.

  • Page 57: Ice Machine Will Not Harvest

    ICE MACHINE WILL NOT HARVEST Mechanical Timer 1. Evaporator temperature below setpoint? 2. Evaporator thermostat cap tube inserted correctly? (Flush with end of bulb well) 3. Evaporator thermostat closed? (wires #4 & timer motor) 4. Timer motor winding closed? 5. Timer functions mechanically? 6.

  • Page 58: Scr Timer Models

    SCR Timer Models WATER PUMP WON’T RUN SCR Timer 1. Toggle switch terminals 2 & 1 closed? (wires #64 & #3) 2. Timer relay closed? (wires #3 & #5 - contacts C & NC on timer) 3. Water pump winding closed? (64) (65) TOGGLE SWITCH...

  • Page 59: Hot Gas Valve Won't Energize

    HOT GAS VALVE WON’T ENERGIZE SCR Timer 1. Line voltage at hot gas valve? (Wires 6& 7)  Yes - Replace hot gas valve coil.  No - Refer to SCR timer diagnostics. RELAY HOT GAS SOLENOID TIME DELAY (21) (10) RELAY (22)

  • Page 60: Water Inlet Valve Won't Energize

    WATER INLET VALVE WON’T ENERGIZE SCR Timer 1. Line voltage at water inlet valve? (Wires 21& 22)  Yes - Replace water inlet valve.  No - Refer to SCR timer diagnostics. RELAY HOT GAS SOLENOID TIME DELAY (21) (10) RELAY (22) WATER INLET...

  • Page 61: Ice Machine Prematurely Harvests

    ICE MACHINE PREMATURELY HARVESTS SCR Timer 1. Line voltage at hot gas valve?  No - Replace hot gas valve 2. Line voltage at NO and 2 terminals on SCR timer? 3. Line voltage at 6 & 2 on SCR timer? ...

  • Page 62: Ice Machine Will Not Harvest

    ICE MACHINE WILL NOT HARVEST SCR Timer 1. Check for line voltage at terminals 1 & 2 and C & 2. If line voltage is not present refer to toggle switch diagnostics. 2. Check for line voltage at 2 & 6. ...

  • Page 63: Water System Checklist

    Water System Checklist A water-related problem often causes the same symptoms as a refrigeration system component malfunction. Water system problems must be identified and eliminated prior to replacing refrigeration components. Water area (evaporator) is dirty  Clean as needed Water inlet pressure not between 1.4 and 5.5 bar ...

  • Page 64: Ice Production Check

    Ice Production Check The amount of ice a machine produces directly relates to the operating water and air temperatures. This means an ice machine with a 20°C outdoor ambient temperature and 10.0°C water produces more ice than the same model ice machine with a 32°C outdoor ambient and 21°C water.

  • Page 65: Analyzing Discharge Pressure

    Analyzing Discharge Pressure 1. Determine the ice machine operating conditions: Air temp. entering condenser ______ Air temp. around ice machine ______ Water temp. entering sump trough ______ 2. Refer to Cycle Times/24 Hour Ice Production/ Refrigeration Pressure Chart for ice machine being checked.

  • Page 66: Discharge Pressure High Checklist

    DISCHARGE PRESSURE HIGH CHECKLIST Improper Installation  Refer to “Installation/Visual Inspection Checklist” Restricted Condenser Air Flow  High inlet air temperature  Condenser discharge air re-circulation  Dirty condenser fins  Defective fan motor Improper Refrigerant Charge  Overcharged  Non-condensable in system ...

  • Page 67: Freeze Cycle Discharge Pressure Low Checklist

    FREEZE CYCLE DISCHARGE PRESSURE LOW CHECKLIST Improper Installation  Refer to “Installation/Visual Inspection Checklist” Improper Refrigerant Charge  Undercharged  Wrong type of refrigerant Other  High side refrigerant lines/component restricted (before mid-condenser) NOTE: Do not limit your diagnosis to only the items listed in the checklists.

  • Page 68: Analyzing Suction Pressure

    Analyzing Suction Pressure The suction pressure gradually drops throughout the freeze cycle. The actual suction pressure (and drop rate) changes as the air and water temperature entering the ice machine changes. These variables also determine the freeze cycle times. To analyze and identify the proper suction pressure drop throughout the freeze cycle, compare the published suction pressure to the published freeze cycle time.
  • Page 69 Procedure Example Using ECS040A Model Ice Step Machine Determine the ice Air temp. entering condenser: machine operating 32°C conditions. Water temp. entering water fill valve: 21°C 40 minutes  2A. Refer to “Cycle Time” and “Operating Pressure” Published Freeze cycle time: charts for ice machine 1.94 to.41 bar ...

  • Page 70: Suction Pressure High Checklist

    SUCTION PRESSURE HIGH CHECKLIST Improper Installation  Refer to “Installation/Visual Inspection Checklist” Discharge Pressure  Discharge pressure is too high, and is affecting suction pressure, refer to “Freeze Cycle Discharge Pressure High Checklist” Improper Refrigerant Charge  Overcharged  Wrong type of refrigerant ...

  • Page 71: Suction Pressure Low Checklist

    SUCTION PRESSURE LOW CHECKLIST Improper Installation  Refer to “Installation/Visual Inspection Checklist” Discharge Pressure  Discharge pressure is too low, and is affecting suction pressure, refer to “Freeze Cycle Discharge Pressure Low Checklist” Improper Refrigerant Charge  Undercharged  Wrong type of refrigerant Other ...

  • Page 72: Discharge Line Temperature Analysis

    Discharge Line Temperature Analysis General Compressor discharge line temperature on a normally operating ice machine steadily increases throughout the freeze cycle. Comparing the temperatures over several cycles will result in a consistent maximum discharge line temperature. Ambient air temperatures affect the maximum discharge line temperature.
  • Page 73 DISCHARGE LINE TEMPERATURE ABOVE 71°C AT END OF FREEZE CYCLE: Ice machines that are operating normally will have consistent maximum discharge line temperatures above 71°C. DISCHARGE LINE TEMPERATURE BELOW 71°C AT END OF FREEZE CYCLE: Ice machines that have a flooding expansion valve will have a maximum discharge line temperature that decreases each cycle.
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  • Page 75 Part Number 80-1479-3 10/10...

  • Page 76: Component Check Procedures

    Component Check Procedures ON/OFF/WASH-FILL TOGGLE SWITCH Function The switch is used to place the ice machine in ON, OFF or WASH mode of operation. Specifications Double-pole, Double-throw switch. Check Procedure 1. Inspect the toggle switch for correct wiring. 2. Isolate the toggle switch by disconnecting all wires from the switch.

  • Page 77: Bin Thermostat

    BIN THERMOSTAT Function The bin thermostat stops the ice machine when the bin is full. When ice cubes contact the bin thermostat bulb holder, the bin thermostat opens and stops the ice machine. When ice cubes no longer contact the bin thermostat bulb holder, the bin thermostat closes and the ice machine starts.

  • Page 78: Evaporator Thermostat

    EVAPORATOR THERMOSTAT Function Mechanical Timer - Energizes the timer motor when the evaporator temperature drops below the control set point. SCR Timer - Supplies and removes power to SCR trigger. No Timer - Initiates and terminates freeze and harvest cycles. Operation Thermostat contacts C &...
  • Page 79 Check Procedure 1. Make sure bulb is inserted correctly (flush with end of bulb well). 2. Check evaporator temperature — is evaporator frosted? 3. Move the thermostat adjustment to the coldest and warmest setting, did the contacts change position? 4. Attach a thermocouple and measure the temperature at the bulb.

  • Page 80: Mechanical Timer

    MECHANICAL TIMER Function Extends the length of the freeze cycle (after the evaporator thermostat closes), initiates and terminates the harvest cycle. Operation  Factory Setting is 11.5 minute freeze cycle, 3.5 minutes harvest.  Total freeze cycle time = the time it takes to close the evaporator thermostat plus 11.5 minutes.
  • Page 81 Mechanical Timer Diagnostics 1. Check for line voltage at the timer motor. (Evaporator thermostat completes timer Motor Circuit. If no voltage is present refer to evaporator thermostat diagnostics.) 2. If timer has voltage and does not move:  Check motor windings. ...

  • Page 82: Low Ambient Adjustment For Mechanical Timer

    LOW AMBIENT ADJUSTMENT FOR MECHANICAL TIMER Timer adjustment for operation in temperatures below 10°C. 1. Disconnect power to the ice machine. 2. Remove timer adjustment tool from the inside of the control box cover. 3. Adjust harvest time to 5 minutes (easier access can be obtained by removing the timer mounting screws).

  • Page 83: S.c.r. Timer

    S.C.R. TIMER Silicon Rectifier (S.C.R.) Switch Function Extends the length of the freeze cycle (after the evaporator thermostat closes), initiates and terminates the harvest cycle. Settings Dom (delay on make) dial indicates minutes and determines the additional length of freeze time after the evaporator thermostat closes.

  • Page 84: Low Ambient Adjustment For Scr Timer

    LOW AMBIENT ADJUSTMENT FOR SCR TIMER Adjust SS (single shot time) dial to 5 minutes. Part Number 80-1479-3 10/10...

  • Page 85: High Pressure Cutout (Hpco) Control

    HIGH PRESSURE CUTOUT (HPCO) CONTROL Water Cooled Only FUNCTION Stops the ice machine if subjected to excessive high- side pressure. The HPCO control is normally closed, and opens on a rise in discharge pressure. SPECIFICATIONS Cut-out: 20.7 Bar (300 psig) Cut-in: 10.3 Bar (150 psig) (Must be below ±...

  • Page 86: Hot Gas Valve

    HOT GAS VALVE General The hot gas valve is an electrically operated valve that opens when energized, and closes when de- energized. Normal Operation The valve is de-energized (closed) during the freeze cycle and energized (open) during the harvest cycle. The valve is positioned between the compressor and the evaporator and performs two functions: 7.
  • Page 87 A small amount of leakage will cause increased freeze times. As the amount of leakage increases, the length of the freeze cycle increases. Refer to the Parts Manual for proper valve application. If replacement is necessary, use only “original” Manitowoc replacement parts. Part Number 80-1479-3 10/10...
  • Page 88 Use the following procedure and table to help determine if a hot gas valve is remaining partially open during the freeze cycle. 1. Wait five minutes into the freeze cycle. 2. Feel the inlet of the hot gas valve. Important Feeling the hot gas valve outlet or across the hot gas valve itself will not work for this comparison.
  • Page 89 Examples of hot gas valve inlet/compressor discharge line temperature comparison Findings Comments The inlet of the hot gas This is normal as the discharge valve is cool enough to line should always be too hot to touch and the touch and the hot gas valve inlet, compressor discharge although too hot to touch during line is hot.

  • Page 90: Refrigerant

    Do not purge refrigerant to the atmosphere. Capture refrigerant using recovery equipment. Follow the manufacturer’s recommendations. Important Manitowoc Ice, Inc. assumes no responsibility for the use of contaminated refrigerant. Damage resulting from the use of contaminated refrigerant is the sole responsibility of the servicing company.
  • Page 91 Self-Contained Recovery/Evacuation Place the toggle switch in the OFF position. Install manifold gauges (with low loss fittings), scale, and recovery unit or two-stage vacuum pump. Open (backseat) the high and low side on manifold gauges. Perform recovery or evacuation: A. Recovery: Operate the recovery unit as directed by the manufacturer’s instructions.
  • Page 92 Charging Procedures Important The charge is critical on all Manitowoc ice machines. Use a scale to ensure the proper charge is installed. 1. Be sure the toggle switch is in the OFF position. 2. Close the vacuum pump valve and the low side manifold gauge valve.

  • Page 93: System Contamination Cleanup

    This section describes the basic requirements for restoring contaminated systems to reliable service. Important Manitowoc Ice, Inc. assumes no responsibility for the use of contaminated refrigerant. Damage resulting from the use of contaminated refrigerant is the sole responsibility of the servicing company.
  • Page 94 Contamination/Cleanup Chart Required Cleanup Symptoms/Findings Procedure No symptoms or suspicion of Normal evacuation/ contamination. recharging procedure Moisture/Air Contamination Mild contamination symptoms. Refrigeration cleanup procedure system open to atmosphere for longer than 15 minutes. Refrigeration test kit and/or acid oil test shows contamination. No burnout deposits in open compressor lines.

  • Page 95: Mild System Contamination Cleanup

    MILD SYSTEM CONTAMINATION CLEANUP Procedure 1. Replace any failed components. 2. If the compressor is good, change the oil. 3. Replace the liquid line drier. NOTE: If the contamination is from moisture, use heat lamps during evacuation. Position them at the compressor, condenser and evaporator prior to evacuation.

  • Page 96: Severe System Contamination Cleanup Procedure

    SEVERE SYSTEM CONTAMINATION CLEANUP PROCEDURE 1. Remove the refrigerant charge. 2. Remove the compressor. 3. Wipe away any burnout deposits from suction and discharge lines at compressor. 4. Sweep through the open system with dry nitrogen. Important Refrigerant sweeps are not recommended, as they release CFC’s into the atmosphere.
  • Page 97 Important Dry nitrogen is recommended for this procedure. This will prevent CFC release. A. Pull vacuum to 1000 microns. Break the vacuum with dry nitrogen and sweep the system. Pressurize to a minimum of .35 bar. B. Change the vacuum pump oil. C.

  • Page 98: Filter-Driers

    Liquid Line Filter Drier The filter-drier used on Manitowoc ice machines are manufactured to Manitowoc specifications. The difference between a Manitowoc drier and an off- the-shelf drier is in filtration. A Manitowoc drier has dirt-retaining filtration, with fiberglass filters on both the inlet and outlet ends.

  • Page 99: Total System Refrigeration Charge

    TOTAL SYSTEM REFRIGERATION CHARGE Important This information is for reference only. Refer to the ice machine serial number tag to verify the system charge. Serial plate information overrides information listed on this page. Refrigerant Model Refrigerant Type Charge (grams) EC018 160 or 180 R134A Air-Cooled...
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  • Page 102: Cycle Times/24 Hour Ice Production And Refrigerant Pressure Charts

    Cycle Times/24 Hour Ice Production and Refrigerant Pressure Charts These charts are used as guidelines to verify correct ice machine operation. Accurate collection of data is essential to obtain the correct diagnosis.  Refer to “OPERATIONAL ANALYSIS CHART” for the list of data that must be collected for refrigeration diagnostics.

  • Page 103: Ec18 Self-Contained Air-Cooled - Standard Cube

    EC18 SELF-CONTAINED AIR-COOLED — STANDARD CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C Condenser Time °C 19.1-21.4 19.7-22.1 19.8-22.2...
  • Page 104 EC18 SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Entering Condenser °C 18.5 18.0 17.9 16.9 16.8 16.7 16.6 16.8 15.9 15.2 15.6 15.5 15.4 14.8 14.7 14.6 14.5 14.3 14.2 14.1 13.4 13.4...
  • Page 105 EC18 SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 6.55-4.48 1.10-0.14 3.10-4.14 2.07-3.10 9.31-6.89 1.24-0.28 4.48-5.52 3.10-4.14 10.69-7.24 1.38-0.34 4.83-6.55 3.79-4.48 13.10-9.31 1.72-0.55 6.20-8.27...

  • Page 106: Ec20 (With Timer) Self-Contained Air-Cooled - Standard Cube

    EC20 (WITH TIMER) SELF-CONTAINED AIR-COOLED — STANDARD CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C Condenser Time °C 18.6-21.2 20.3-23.1 21.3-24.1...
  • Page 107 EC20 (WITH TIMER) SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Entering Condenser °C Based on average ice weight of 0.43 - 0.48 kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 24...
  • Page 108 EC20 (WITH TIMER) SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 7.24-4.83 1.38-0 2.76-3.45 1.72-2.76 11.38-6.89 1.72-0.34 3.45-5.51 2.76-4.14 20.68-13.79 2.76-0.69 4.14-9.30 4.14-6.89 All pressures are in bar.

  • Page 109: Ec20 (With Timer) Self-Contained Air-Cooled - Large Cube

    EC20 (WITH TIMER) SELF-CONTAINED AIR-COOLED — LARGE CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C Condenser Time °C 24.5-26.4 28.8-31.0 29.8-32.1...
  • Page 110 EC20 (WITH TIMER) SELF-CONTAINED AIR-COOLED — LARGE CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Entering Condenser °C Based on average ice weight of 0.74 - 0.79 kg per cycle. Individual cube weight 32 grams ±1. Number of individual cubes per cycle: 24 Continued on next page …...
  • Page 111 EC20 (WITH TIMER) SELF-CONTAINED AIR-COOLED — LARGE CUBE (Continued) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 8.96-6.89 1.72-0 2.76-5.51 1.72-4.14 11.03-7.93 2.07-0 2.76-6.89 2.76-5.51 8.27-12.41 2.07-0.69 3.10-7.58 3.10-7.58 All pressures are in bar.

  • Page 112: Ec20 (Without Timer) Self-Contained Air-Cooled - Standard Cube

    EC20 (WITHOUT TIMER) SELF-CONTAINED AIR-COOLED — STANDARD CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C Condenser Time °C 19.1-21.4 19.7-22.1 19.8-22.2...
  • Page 113 EC20 (WITHOUT TIMER) SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Entering Condenser °C 18.5 18.0 17.9 16.9 16.8 16.7 16.6 16.8 15.9 15.2 15.6 15.5 15.4 14.8 14.7 14.6 14.5 14.3 14.2 14.1 13.4 13.4...
  • Page 114 EC20 (WITHOUT TIMER) SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 6.55-4.48 1.10-0.14 3.10-4.14 2.07-3.10 9.31-6.89 1.24-0.28 4.48-5.52 3.10-4.14 10.69-7.24 1.38-0.34 4.83-6.55 3.79-4.48 13.10-9.31 1.72-0.55 6.20-8.27...

  • Page 115: Ec30 Self-Contained Air-Cooled - Standard Cube

    EC30 SELF-CONTAINED AIR-COOLED — STANDARD CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C Condenser Time °C 16.5-18.8 18.6-21.2 19.4-22.1 20.3-23.1 21.3-24.1...
  • Page 116 EC30 SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Entering Condenser °C Based on average ice weight of 0.43 - 0.48 kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 24 Continued on next page …...
  • Page 117 EC30 SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 9.65-5.17 1.38-0 2.16-4.48 1.72-3.10 15.86-7.58 2.07-0 4.14-6.55 2.76-4.83 25.51-14.48 2.76-0.69 4.14-10.0 4.83-8.27 All pressures are in bar. Suction pressure drops gradually throughout the freeze cycle.

  • Page 118: Ec30 Self-Contained Air-Cooled - Large Cube

    EC30 SELF-CONTAINED AIR-COOLED — LARGE CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C Condenser Time °C 26.1-28.1 28.8-31.0 29.8-32.1 33.2-35.7 34.6-37.1...
  • Page 119 EC30 SELF-CONTAINED AIR-COOLED — LARGE CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Entering Condenser °C Based on average ice weight of 0.74 - 0.79 kg per cycle. Individual cube weight 32 grams ±1. Number of individual cubes per cycle: 24...
  • Page 120 EC30 SELF-CONTAINED AIR-COOLED — LARGE CUBE (Continued) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 9.65-5.17 1.38-0 2.16-4.48 1.72-3.10 15.86-7.58 2.07-0 4.14-6.55 2.76-4.83 25.51-14.48 2.76-0.69 4.14-10.0 4.83-8.27 All pressures are in bar. Suction pressure drops gradually throughout the freeze cycle.

  • Page 121: Ec30 (Serial Break Not Available) Self-Contained Air-Cooled - Standard Cube

    EC30 (SERIAL BREAK NOT AVAILABLE) SELF-CONTAINED AIR-COOLED — STANDARD CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C Condenser Time °C 18.6-21.2...
  • Page 122 EC30 (SERIAL BREAK NOT AVAILABLE) SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Cont.) 24 Hour Ice Production Water Temperature °C Air Temp. Entering Condenser °C Based on average ice weight of 0.43 - 0.48 kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 24 Continued on next page …...
  • Page 123 EC30 (SERIAL BREAK NOT AVAILABLE) SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Cont.) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 7.24-4.83 1.38-0 2.76-3.45 1.72-2.76 11.38-6.89 1.72-0.34 3.45-5.51 2.76-4.14 20.68-13.79 2.76-0.69 4.14-9.30 4.14-6.89 All pressures are in bar.

  • Page 124: Ec30 (Serial Break Not Available) Self-Contained Air-Cooled - Large Cube

    EC30 (SERIAL BREAK NOT AVAILABLE) SELF-CONTAINED AIR-COOLED — LARGE CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C Condenser Time °C 24.5-26.4...
  • Page 125 EC30 (SERIAL BREAK NOT AVAILABLE) SELF-CONTAINED AIR-COOLED — LARGE CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Entering Condenser °C Based on average ice weight of 0.74 - 0.79 kg per cycle. Individual cube weight 32 grams ±1. Number of individual cubes per cycle: 24...
  • Page 126 EC30 (SERIAL BREAK NOT AVAILABLE) SELF-CONTAINED AIR-COOLED — LARGE CUBE (Continued) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 8.96-6.89 1.72-0 2.76-5.51 1.72-4.14 11.03-7.93 2.07-0 2.76-6.89 2.76-5.51 8.27-12.41 2.07-0.69 3.10-7.58 3.10-7.58 All pressures are in bar.

  • Page 127: Ec40 Self-Contained Air-Cooled - Standard Cube

    EC40 SELF-CONTAINED AIR-COOLED — STANDARD CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C Condenser Time °C 21.8-24.6 23.1-26.0 24.5-27.6 25.3-28.5 27.0-30.4...
  • Page 128 EC40 SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Entering Condenser °C Based on average ice weight of 0.72 - 0.80 kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 40 Continued on next page …...
  • Page 129 EC40 SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 7.58-4.48 1.72-.14 2.41-4.14 1.38-2.07 11.03-5.86 1.94-.28 3.45-5.87 1.72-3.45 13.10-7.24 1.94-.34 3.79-6.55 2.07-4.14 15.86-9.31 1.94-.41 4.82-8.27 2.76-4.82 21.37-11.72...

  • Page 130: Ec40 Self-Contained Air-Cooled - Large Cube

    EC40 SELF-CONTAINED AIR-COOLED — LARGE CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C Condenser Time °C 28.4-30.4 30.2-32.4 32.2-34.5 32.9-35.3 34.5-36.9...
  • Page 131 EC40 SELF-CONTAINED AIR-COOLED — LARGE CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Entering Condenser °C Based on average ice weight of 1.24 - 1.32 kg per cycle. Individual cube weight 32 grams ±1. Number of individual cubes per cycle: 40...
  • Page 132 EC40 SELF-CONTAINED AIR-COOLED — LARGE CUBE (Continued) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 7.58-4.48 1.72-.14 2.41-4.14 1.38-2.07 11.03-5.86 1.94-.28 3.45-5.87 1.72-3.45 13.10-7.24 1.94-.34 3.79-6.55 2.07-4.14 15.86-9.31 1.94-.41 4.82-8.27 2.76-4.82 21.37-11.72...

  • Page 133: Ec40 Self-Contained Water-Cooled - Standard Cube

    EC40 SELF-CONTAINED WATER-COOLED — STANDARD CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Around Ice Machine Water Temperature °C Harvest Time °C 21.8-24.6 23.1-26.0 24.5-27.6 24.5-27.6...
  • Page 134 EC40 SELF-CONTAINED WATER-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Around Ice Machine °C Based on average ice weight of 0.72 - 0.80 kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 40 Continued on next page …...
  • Page 135 EC40 SELF-CONTAINED WATER-COOLED — STANDARD CUBE (Continued) 32 Air Temperature Around Ice Machine Condenser Water Water Temperature °C Consumption Gal/24 Hours 2283 Water regulating valve set to maintain 9 bar discharge pressure. Operating Pressures Freeze Cycle Harvest Cycle Water Temperature Entering Condenser °C Discharge Pressure Suction Pressure...

  • Page 136: Ec40 Self-Contained Water-Cooled - Large Cube

    EC40 SELF-CONTAINED WATER-COOLED — LARGE CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Around Ice Machine Water Temperature °C Harvest Time °C 30.8-33.1 32.2-34.5 34.5-36.9 33.7-36.1...
  • Page 137 EC40 SELF-CONTAINED WATER-COOLED — LARGE CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Around Ice Machine °C Based on average ice weight of 1.24 - 1.32 kg per cycle. Individual cube weight 32 grams ±1. Number of individual cubes per cycle: 40...
  • Page 138 EC40 SELF-CONTAINED WATER-COOLED — LARGE CUBE (Continued) 32 Air Temperature Around Ice Machine Condenser Water Water Temperature °C Consumption Gal/24 Hours 2474 Water regulating valve set to maintain 9 bar discharge pressure. Operating Pressures Freeze Cycle Harvest Cycle Water Temperature Entering Condenser °C Discharge Pressure Suction Pressure...

  • Page 139: Ec50 Self-Contained Air-Cooled - Standard Cube

    EC50 SELF-CONTAINED AIR-COOLED — STANDARD CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C Condenser Time °C 18.1-20.5 19.5-22.1 20.1-22.7 20.6-23.3 21.8-24.6...
  • Page 140 EC50 SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Entering Condenser °C Based on average ice weight of 0.72 - 0.80 kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 40 Continued on next page ….
  • Page 141 EC50 SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 9.31-4.48 2.76-.14 2.76-4.83 1.38-2.76 14.48-6.21 3.31-.14 4.14-7.58 1.72-4.48 14.48-7.58 3.45-.14 4.82-8.27 2.07-4.82 17.23-8.96 3.79-.14 6.21-9.65 2.76-5.87 24.13-12.07...

  • Page 142: Ec50 Self-Contained Air-Cooled - Large Cube

    EC50 SELF-CONTAINED AIR-COOLED — LARGE CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C Condenser Time °C 24.8-26.7 26.8-28.7 27.8-29.8 29.0-31.1 30.2-32.4...
  • Page 143 EC50 SELF-CONTAINED AIR-COOLED — LARGE CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Entering Condenser °C Based on average ice weight of 1.24 - 1.32 kg per cycle. Individual cube weight 32 grams ±1. Number of individual cubes per cycle: 40...
  • Page 144 EC50 SELF-CONTAINED AIR-COOLED — LARGE CUBE (Continued) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 9.31-4.48 2.76-.14 2.76-4.83 1.38-2.76 14.48-6.21 3.31-.14 4.14-7.58 1.72-4.48 14.48-7.58 3.45-.14 4.82-8.27 2.07-4.82 17.23-8.96 3.79-.14 6.21-9.65 2.76-5.87 24.13-12.07...

  • Page 145: Ec50 Self-Contained Water-Cooled - Standard Cube

    EC50 SELF-CONTAINED WATER-COOLED — STANDARD CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Around Ice Machine Water Temperature °C Harvest Time °C 19.5-22.1 20.1-22.7 20.6-23.3 20.6-23.3...
  • Page 146 EC50 SELF-CONTAINED WATER-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Around Ice Machine °C Based on average ice weight of 0.72 - 0.80 kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 40 Continued on next page …...
  • Page 147 EC50 SELF-CONTAINED WATER-COOLED — STANDARD CUBE (Continued) 32 Air Temperature Around Ice Machine Condenser Water Water Temperature °C Consumption Gal/24 Hours 1194 4752 Water regulating valve set to maintain 9 bar discharge pressure. Operating Pressures Freeze Cycle Harvest Cycle Water Temperature Entering Condenser °C Discharge Pressure Suction Pressure...

  • Page 148: Ec50 Self-Contained Water-Cooled - Large Cube

    EC50 SELF-CONTAINED WATER-COOLED — LARGE CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Around Ice Machine Water Temperature °C Harvest Time °C 26.8-28.7 27.3-29.3 28.4-30.4 27.8-29.8...
  • Page 149 EC50 SELF-CONTAINED WATER-COOLED — LARGE CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Around Ice Machine °C Based on average ice weight of 1.24 - 1.32 kg per cycle. Individual cube weight 32 grams ±1. Number of individual cubes per cycle: 40...
  • Page 150 EC50 SELF-CONTAINED WATER-COOLED — LARGE CUBE (Continued) 32 Air Temperature Around Ice Machine Condenser Water Water Temperature °C Consumption Gal/24 Hours 1171 3896 Water regulating valve set to maintain 9 bar discharge pressure. Operating Pressures Freeze Cycle Harvest Cycle Water Temperature Entering Condenser °C Discharge Pressure Suction Pressure...

  • Page 151: Ec65 Self-Contained Air-Cooled - Standard Cube

    EC65 SELF-CONTAINED AIR-COOLED — STANDARD CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C Condenser Time °C 21.2-23.8 23.4-26.4 25.0-28.1 25.6-28.8 27.4-30.8...
  • Page 152 EC65 SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Entering Condenser °C Based on average ice weight of 1.01 - 1.12 kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 56 Continued on next page …...
  • Page 153 EC65 SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 12.06-9.65 4.13-1.80 6.21-8.27 4.83-5.87 16.20-12.41 4.83-1.93 7.58-10.69 5.52-8.62 17.58-14.48 4.83-2.07 7.92-11.72 6.89-9.31 20.68-17.24 5.17-2.21 8.27-13.79 7.93-10.34 26.20-22.06...

  • Page 154: Ec65 Self-Contained Air-Cooled - Large Cube

    EC65 SELF-CONTAINED AIR-COOLED — LARGE CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C Condenser Time °C 28.1-30.0 32.3-34.4 34.1-36.4 35.5-37.9 37.0-39.4...
  • Page 155 EC65 SELF-CONTAINED AIR-COOLED — LARGE CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Entering Condenser °C Based on average ice weight of 1.49 - 1.58 kg per cycle. Individual cube weight 32 grams ±1. Number of individual cubes per cycle: 48...
  • Page 156 EC65 SELF-CONTAINED AIR-COOLED — LARGE CUBE (Continued) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 12.07-9.65 4.14-1.72 6.21-7.58 4.83-6.21 15.86-12.41 4.14-1.93 8.27-11.03 5.52-7.93 17.58-15.17 4.48-2.07 8.27-11.72 7.58-9.31 20.68-17.24 4.83-2.21 8.27-13.79 8.62-10.69 25.51-22.06...

  • Page 157: Ec65 Self-Contained Water-Cooled - Standard Cube

    EC65 SELF-CONTAINED WATER-COOLED — STANDARD CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time. Freeze Time Air Temp. Around Ice Machine Water Temperature °C Harvest Time °C 23.9-26.9 23.9-26.9 26.8-30.1 24.5-27.5...
  • Page 158 EC65 SELF-CONTAINED WATER-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Around Ice Machine °C Based on average ice weight of 1.01 - 1.12 kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 56 Continued on next page …...
  • Page 159 EC65 SELF-CONTAINED WATER-COOLED — STANDARD CUBE (Continued) 32 Air Temperature Around Ice Machine Condenser Water Water Temperature °C Consumption Gal/24 Hours 1057 9488 Operating Pressures Freeze Cycle Harvest Cycle Water Temperature Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 15.86-15.51 4.55-1.93...

  • Page 160: Ec65 Self-Contained Water-Cooled - Large Cube

    EC65 SELF-CONTAINED WATER-COOLED — LARGE CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Around Ice Machine Water Temperature °C Harvest Time °C 32.9-35.1 33.5-35.7 34.8-37.1 34.1-36.4...
  • Page 161 EC65 SELF-CONTAINED WATER-COOLED — LARGE CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Around Ice Machine °C Based on average ice weight of 1.49 - 1.58 kg per cycle. Individual cube weight 32 grams ±1. Number of individual cubes per cycle: 48...
  • Page 162 EC65 SELF-CONTAINED WATER-COOLED — LARGE CUBE (Continued) 32 Air Temperature Around Ice Machine Condenser Water Water Temperature °C Consumption Gal/24 Hours 1171 3896 Water regulating valve set to maintain 15. 9 bar discharge pressure. Operating Pressures Freeze Cycle Harvest Cycle Water Temperature Entering Condenser °C Discharge Pressure...

  • Page 163: Ec80 Self-Contained Air-Cooled - Standard Cube

    EC80 SELF-CONTAINED AIR-COOLED — STANDARD CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C Condenser Time °C 15.1-17.2 16.7-18.9 18.0-20.3 18.1-20.5 19.5-22.0...
  • Page 164 EC80 SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Entering Condenser °C 78.1 71.9 67.8 67.3 63.2 59.1 55.1 50.2 62.7 56.2 54.6 50.5 46.4 58.2 54.1 50.0 45.9 41.9 37.8 33.7 45.5 41.4 37.3 33.2...
  • Page 165 EC80 SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 13.79-9.65 3.45-1.52 6.89-8.27 4.48-5.17 17.24-12.41 4.14-1.93 9.31-11.03 6.21-7.24 17.24-13.79 4.48-2.07 10.68-12.41 6.89-7.93 21.37-17.24 4.69-2.27 12.07-15.17 8.27-10.00 26.20-21.37...

  • Page 166: Ec80 Self-Contained Air-Cooled - Large Cube

    EC80 SELF-CONTAINED AIR-COOLED — LARGE CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °C Condenser Time °C 19.5-20.9 21.7-23.2 22.5-24.1 23.9-25.5 24.8-26.6...
  • Page 167 EC80 SELF-CONTAINED AIR-COOLED — LARGE CUBE (Continued) 24 Hour Ice Production. Water Temperature °C Air Temp. Entering Condenser °C 93.3 85.1 82.4 78.4 75.7 73.0 70.3 66.9 71.8 66.7 66.3 63.6 60.9 65.1 62.4 59.6 56.9 54.2 51.5 48.8 53.0 50.2 47.5 44.8...
  • Page 168 EC80 SELF-CONTAINED AIR-COOLED — LARGE CUBE (Continued) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 13.79-9.65 3.45-1.59 6.89-8.27 4.48-5.17 13.79-17.24 4.48-1.72 9.65-11.38 5.86-6.89 18.62-14.48 4.48-1.79 11.03-12.41 6.89-8.27 21.37-17.24 4.69-2.07 12.41-15.17 7.58-10.00 26.20-22.75...

  • Page 169: Ec80 Self-Contained Water-Cooled - Standard Cube

    EC80 SELF-CONTAINED WATER-COOLED — STANDARD CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Around Ice Machine Water Temperature °C Harvest Time °C 16.2-18.3 16.4-18.6 18.2-20.6 16.7-18.9...
  • Page 170 EC80 SELF-CONTAINED WATER-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Water Temperature °C Air Temp. Around Ice Machine °C Based on average ice weight of 1.01 - 1.12 kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 56 Continued on next page …...
  • Page 171 EC80 SELF-CONTAINED WATER-COOLED — STANDARD CUBE (Continued) 32 Air Temperature Around Ice Machine Condenser Water Water Temperature °C Consumption Gal/24 Hours 1480 8893 Water regulating valve set to maintain 15.9 bar discharge pressure. Operating Pressures Freeze Cycle Harvest Cycle Water Temperature Entering Condenser °C Discharge Pressure Suction Pressure...

  • Page 172: Ec80 Self-Contained Water-Cooled - Large Cube

    EC80 SELF-CONTAINED WATER-COOLED — LARGE CUBE NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time Air Temp. Around Ice Machine Water Temperature °C Harvest Time °C 14.5-16.4 15.1-17.2 15.9-18.0 15.4-17.4...
  • Page 173 EC80 SELF-CONTAINED WATER-COOLED — LARGE CUBE (Continued) 24 Hour Ice Production. Water Temperature °C Air Temp. Around Ice Machine °C Based on average ice weight of 1.49 - 1.58 kg per cycle. Individual cube weight 32 grams ±1. Number of individual cubes per cycle: 48...
  • Page 174 EC80 SELF-CONTAINED WATER-COOLED — LARGE CUBE (Continued) 32 Air Temperature Around Ice Machine Condenser Water Water Temperature °C Consumption Gal/24 Hours 1316 9060 Water regulating valve set to maintain 15.9 bar discharge pressure. Operating Pressures Freeze Cycle Harvest Cycle Water Temperature Entering Condenser °C Discharge Pressure Suction Pressure...
  • Page 175 This Page Intentionally Left Blank –162–...

  • Page 176: Wiring Diagram

    Diagrams Wiring Diagram MECHANICAL TIMER MODELS L2 (N) (15) 11 10 (11) (WATER COOLED ONLY) (WATER COOLED ONLY) (13) H.P. CUTOUT H.P. CUTOUT START START (15) (82) COMPRESSOR COMPRESSOR RELAY RELAY (12) THERMOSTAT THERMOSTAT (64) FAN MOTOR FAN MOTOR (65) (AIR COOLED ONLY) (AIR COOLED ONLY) (49)

  • Page 177: Scr Models

    SCR MODELS L2 (N) L2 (N) Start Start Capacitor Capacitor (15) (15) Compressor Compressor 11 10 (11) (11) H.P. Cutout H.P. Cutout (13) (13) Start Start (Water Cooled Only) (Water Cooled Only) Relay Relay (15) (15) (To Relay 14) (To Relay 14) (82) (82) Bin Thermostat...

  • Page 178: No Timer Models

    NO TIMER MODELS L2 (N) GROUND START CAPACITOR COMPRESSOR (15) (11) 11 10 H.P. CUTOUT (13) (WATER COOLED ONLY) START (15) (TO RELAY 14) RELAY (82) FAN MOTOR BIN THERMOSTAT (AIR COOLED ONLY) (12) (64) (65) TOGGLE SWITCH WATER PUMP (49) HOT GAS SOLENOID...

  • Page 179: Tubing Schematics

    Tubing Schematics EC18/EC20/EC30/EC40 TUBING SCHEMATIC 1. Compressor 2. Hot Gas Valve 3. Condenser (Air or Water Cooled) 4. Receiver (Water Cooled Only) 5. Liquid Line Drier 6. Suction Accumulator with Heat Exchanger 7. Heat Exchanger 8. Capillary Tube 9. Evaporator...

  • Page 180: Ec50/Ec65/Ec80 Tubing Schematic

    EC50/EC65/EC80 TUBING SCHEMATIC 1. Compressor 2. Hot Gas Valve 3. Condenser (Air or Water Cooled) 4. Receiver (Water Cooled Only) 5. Liquid Line Drier 6. Heat Exchanger 7. Thermostatic Expansion Valve 8. Evaporator –167–...
  • Page 181 –168–...
  • Page 184 MANITOWOC ICE 2110 South 26th Street P.O. Box 1720 Manitowoc, WI 54221-1720 USA Phone: 920-682-0161 Fax: 920-683-7585 Website – www.manitowocice.com ©2010 Manitowoc Ice...

This manual is also suitable for:

Ec20Ec30Ec40Ec50Ec65Ec80

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