Manitowoc UG080A Technician's Handbook
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Manitowoc UG080A Technician's Handbook

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Manitowoc
UG 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 040004390 11/14

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Kiran Karanjkhele
May 2, 2025

Machine is going in cleaning mode

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1 comments:
Mr. Anderson
May 16, 2025

The Manitowoc UG080A machine goes into cleaning mode to remove dirt, scale, and other buildup inside the ice machine. This helps maintain efficient operation and hygiene. The cleaning mode circulates a cleaner/water solution through the system to clean internal components like the sump, spray bar, and evaporator moldings. Regular cleaning is recommended every six months or more often if needed.

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Krishn kanhainya
February 15, 2025

ice cube machine cycle time diley

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1 comments:
Mr. Anderson
May 14, 2025

The cycle time delay for the Manitowoc ice cube machine UG080A occurs after the storage bin is full. The machine stops approximately 45 seconds after continuous ice contact with the bin thermostat probe, then remains off for a 3-minute delay before restarting a new freeze cycle once the probe is clear.

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Summary of Contents for Manitowoc UG080A

  • Page 1 Manitowoc UG 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 040004390 11/14...
  • 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.
  • Page 6 This Page Intentionally Left Blank...

  • Page 7: Table Of Contents

    Table of Contents Table of Contents ......1 General Information 1 Model Numbers ......1 Installation 3 Location of Ice Machine .
  • Page 8 Suction Pressure Low Checklist ... . . 52 Discharge Line Temperature Analysis ..53 Component Check Procedures 55 On/Off/Wash-Fill Toggle Switch ... . . 55 Bin thermistor (T3).
  • Page 9 Cube (Continued) ..... 114 UG080A Self-Contained Air-Cooled — Standard Cube ....... 115 UG080A Self-Contained Air-Cooled —...
  • Page 10 Cube (Continued) ..... . 117 Diagrams 119 Wiring Diagram......119 UG18/UG20 air-cooled .

  • Page 11: Table Of Contents

    General Information Model Numbers This manual covers the following models: Self-Contained Water-Cooled Air-Cooled UG018A UG020A UG030A UG030W UG040A UG050A UG050W UG065A UG080A –1–...
  • Page 12 This Page Intentionally Left Blank –2–...

  • Page 13: 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 14: 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 15: 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 16: Electrical Specifications

    ELECTRICAL SPECIFICATIONS Air-Cooled Water-Cooled Voltage/Phase/ Maximum Ice Machine Maximum Fuse/ Cycle Total Amps Fuse/Circuit Total Amps Circuit Breaker Breaker UG018 230/1/50 230/1/50 UG020 230/1/60 230/1/50 UG030 230/1/60 115/1/60 230/1/50 UG040 230/1/60...

  • Page 17: Power Consumption - Kwh Per 24 Hours

    230/1/50 UG050 230/1/60 115/1/60 230/1/50 UG065 230/1/60 230/1/50 UG080 230/1/60...

  • Page 18: Ice Machine Heat Of Rejection

    ICE MACHINE HEAT OF REJECTION Heat of Rejection Series Ice Machine Air Conditioning Peak UG18 1,150 2,300 UG20 1,400 2,600 UG30 1,900 3,300 UG40 2,100 4,100 UG50 2,600 5,000 UG65 2,900 5,000 UG80 4,300 7,400 BTU/Hour Because the heat of rejection varies during the ice making cycle, the figure shown is an average.

  • Page 19: Component Identification

    Component Identification Water Curtains Water Trough Control Air Cooled board Condenser On/Off/Wash-Fill Toggle Switch...
  • Page 20 Evaporator Ice Chute Spray Nozzles Spray Bar Toggle Switch...

  • Page 21: 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...
  • Page 22 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 23 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 the ice curtain and lift up. 2. To re-install into ice machine, pivot the water curtain and pull down into position.
  • Page 24 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 25: 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 26 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 27: 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 28: 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. Mix 4 liters of water with 500 ml of cleaner in a plastic or stainless container. Cleaner Water 500 ml (16 oz)
  • Page 29 Step 8 After 13.5 minutes, set the toggle switch to the OFF position. Remove water curtain, ice chute and over flow tube from the water sump. Allow all water to drain from the sump. Replace drain plug . Set toggle switch to WASH and circulate for 12minutes.
  • Page 30 position. Remove water curtain, ice chute, water sump over flow tube. Drain water from sump and replace tub Step 18 Replace all parts. Step 19 Place toggle switch to ON position,ice machine will go into ice making cycle.
  • Page 31 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 32 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 33: Operation

    Operation Sequence Of Operation NITIAL START-UP 1. Water Inlet and Pressure Equalization Turn the toggle switch to”ON” positon,the water fill valve and harvest valve are energized, 300 seconds later, the water fill valve is de-energized. 20seconds after the harvest valve solenoid is energized, the compressor is energized.

  • Page 34: Harvest Cycle

    3. 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 35: 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. 1. Allow the ice machine to operate for three complete cycles. The cubes should have a small dimple in the center. 2.
  • Page 36 test button dip switch Decrease Cube Size Factory Default Setting Increase Cube Size...

  • Page 37: Cube Shape

    CUBE SHAPE The standard cube has an average weight of 19 Notice the normal dimple in the center of the cube.

  • Page 39: 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 40: 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. Compressor Relay LED lit? 2. Start capacitor and relay function? 3.

  • Page 41: Compressor Electrical Diagnostics

    COMPRESSOR ELECTRICAL DIAGNOSTICS The compressor does not start or will trip repeatedly on overload. Check Resistance (OHM) Values Compressor windings can have very low ohm NOTE: 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 42 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 43: 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 44: Water Pump Won't Run

    WATER PUMP WON’T RUN 1. Water pump winding closed? • Yes-rebulid or replace water pump. • No-Water Pump Relay LED on control board lit? ∗ Yes:repair wiring ∗ No: rebulid or replace control board HOT GAS VALVE WON’T ENERGIZE 1. Line voltage at hot gas valve? •...

  • Page 45: Ice Machine Prematurely Harvests

    ICE MACHINE PREMATURELY HARVESTS 1. Line voltage at hot gas valve? > No - Replace hot gas valve. 2. had set the "dip switch"? >Yes - Refer to"ice cube thickness check" adjusting increase cube size(increase Increased ice freeze time) Refer to" thermistor diagnostics.” test the Water Thermistor and the Liquid Line Thermistor .

  • Page 46: Ce Machine Will Not Harvest

    CE MACHINE WILL NOT HARVEST 1. Liquid Line Thermistor temperature below setpoint? 2. Liquid Line Thermistor sensor installation correctly? 3. Refer to" thermistor diagnostics.” test the Liquid Line Thermistor. Line voltage at hot gas valve and water inlet Solenoid?

  • Page 47: Evaporator Thermostat

    EVAPORATOR THERMOSTAT Function Thermistor resistance values change with temperature.The value supplied to the control board is used to Initiates and terminates freeze cycle?harvest cycle and automatic shutdown? Three thermistors are located on the ice machine. They are labeled T1, T2, T3? T1- Water thermistor located at the water trough.
  • Page 48 Temperatur Temperatur Resistance e of e of Resistance Thermistor Thermistor K Ohms (x K Ohms (x °C 1000) 1000) 171.0 3.124 159.9 2.999 149.5 2.879 140.0 2.764 131.1 2.656 122.8 2.551 115.1 2.452 108.0 2.356 101.2 2.266 95.03 2.179 89.24 2.095 83.83 2.016...
  • Page 49 Temperatur Temperatur Resistance e of e of Resistance Thermistor Thermistor K Ohms (x K Ohms (x °C 1000) 1000) 26.24 0.9715 24.85 0.9386 23.55 0.9069 22.33 0.8766 21.18 0.8173 20.09 0.8192 19.07 0.7922 18.10 0.7662 17.19 0.7411 16.33 0.7170 15.52 0.6939 14.75 0.6715...
  • Page 50 Temperatur Temperatur Resistance e of e of Resistance Thermistor Thermistor K Ohms (x K Ohms (x °C 1000) 1000) 5.692 0.3613 5.444 0.3508 5.208 0.3407 4.984 Temperatur Temperatur Resistance e of e of Resistance Thermistor Thermistor K Ohms (x K Ohms (x °C 1000) 1000)
  • Page 51 Temperatur Temperatur Resistance e of e of Resistance Thermistor Thermistor K Ohms (x K Ohms (x °C 1000) 1000) 82.97 3.561 78.77 3.446 74.80 3.336 71.05 3.230 67.52 3.127 64.19 3.028 61.03 2.933 58.06 2.841 55.24 2.753 52.58 2.667 50.07 2.585 47.68 2.505...
  • Page 52 Temperatur Temperatur Resistance e of e of Resistance Thermistor Thermistor K Ohms (x K Ohms (x °C 1000) 1000) 19.16 1.377 18.36 1.338 17.60 1.300 16.88 1.264 16.19 1.229 15.53 1.195 14.90 1.162 14.30 1.129 13.73 1.098 13.19 1.068 12.67 1.039 12.17 1.011...
  • Page 53 Check Procedure 1. Make sure the thermistor sensors installation correctly 2. Disconnect thermistor from control board and measure resistance. 3. Measure temperature at the thermistor. 4. Compare measured resistance/ temperature.Creadings to resistance/temperature relationship • Within 10% of the published resistance value- Thermistor is good •...

  • Page 54: 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 55: 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 56: 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 57: 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 58: 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) Do not limit your diagnosis to only the items NOTE: listed in the checklists.

  • Page 59: 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 60 Procedure Example Using UG040A Model Ice Step Machine Determine the ice Air temp. entering condenser: machine operating 32°C conditions. Water temp. entering water fill valve: 21°C 2A. Refer to “Cycle Time” and 39.28 minutes “Operating Pressure” Published Freeze cycle time: charts for ice machine 2.92 to2.2 bar model being checked.

  • Page 61: 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 62: 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 63: 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 64 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.

  • Page 65: 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 66: Bin Thermistor (T3)

    BIN THERMISTOR (T3) Function The bin thermistor stops the ice machine when the bin is full. When ice cubes contact the bin thermistor bulb holder, the bin thermistor opens and stops the ice machine. When ice cubes no longer contact the bin thermistor bulb holder, the bin thermistor closes and the ice machine starts.
  • Page 67 Check Procedure Warning Disconnect electrical power to the entire ice machine before proceeding. Make sure bulb is inserted correctly 35.5 cm in the bulb well. Disconnect the wires from the bin thermostat and check the resistance across the terminals. No Ice on Bulb Ice on Bulb Result Closed (O)

  • Page 68: Sump Water Thermistor (T1)& Liquid Line Thermistor(T2)

    SUMP WATER THERMISTOR (T1)& LIQUID LINE THERMISTOR(T2) Function The sump water thermistor sensor immersed in water to detect sump temperature.The value supplied to the control board is used to Initiates freeze cycle The liquid line thermistor senses the refrigeration system liquid line temperature. This is used in conjunction with the control board to determine the length of the freeze and harvest cycles Specifications...
  • Page 69 Temperature/Resistance Chart Important If the ohmmeter reads “OL,” check the scale setting on the meter before assuming the thermistor is bad. TI &T3 Temperatur Temperatur Resistance e of e of Resistance Thermistor Thermistor K Ohms (x K Ohms (x °C 1000) 1000) 344.6...
  • Page 70 Temperatur Temperatur Resistance e of e of Resistance Thermistor Thermistor K Ohms (x K Ohms (x °C 1000) 1000) 69.70 1.797 65.58 1.731 61.75 1.667 58.16 1.606 54.81 1.547 51.66 1.491 48.72 1.437 45.97 1.385 43.39 1.336 40.96 1.289 38.69 1.243 36.56 1.200...
  • Page 71 Temperatur Temperatur Resistance e of e of Resistance Thermistor Thermistor K Ohms (x K Ohms (x °C 1000) 1000) 12.69 0.6094 12.07 0.5902 11.49 0.5717 10.94 0.5538 10.43 0.5367 9.932 0.5201 9.466 0.5041 9.025 0.4887 8.608 0.4739 8.211 0.4595 7.836 0.4457 7.480 0.4323...
  • Page 72 Temperatur Temperatur Resistance e of e of Resistance Thermistor Thermistor K Ohms (x K Ohms (x °C 1000) 1000) 200.6 6.162 189.3 5.945 178.7 5.738 168.8 5.538 159.4 5.347 150.6 5.163 142.4 4.987 134.7 4.817 127.5 4.655 120.6 4.498 114.2 4.348 108.2 4.203...
  • Page 73 Temperatur Temperatur Resistance e of e of Resistance Thermistor Thermistor K Ohms (x K Ohms (x °C 1000) 1000) 39.36 2.214 37.55 2.147 35.83 2.082 34.19 2.020 32.65 1.960 31.18 1.902 29.78 1.846 28.49 1.791 27.20 1.739 26.01 1.688 24.88 1.639 23.80 1.592...
  • Page 74 Temperatur Temperatur Resistance e of e of Resistance Thermistor Thermistor K Ohms (x K Ohms (x °C 1000) 1000) 10.40 0.9066 10.00 0.8832 9.622 0.8604 9.260 0.8384 8.913 0.8170 8.582 0.7964 8.265 0.7762 7.961 0.7564 7.670 0.7374 7.391 0.7190 7.124 0.7010 6.868...

  • Page 75: 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 Cut-in: Model UG030W 300 psig ± 10 150 psig ±...

  • Page 76: 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 77 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.
  • Page 78 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 79 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 80 This Page Intentionally Left Blank...

  • Page 81: 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 82 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 83 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 84: 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 85 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 86: 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 87: 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 88 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 89: 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 90: 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 Refrigerant Model Charge (grams) Type UG018AG-251G R134A UG020AG-251G R134A...

  • Page 91: 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 92: Cube

    UG18A 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 Water Temperature °C Harvest Time Condenser °C 18.82-20.77 19.99-24.8 20.58-25.89 1.4-3.5 min.

  • Page 93: Ug18A Self-Contained Air-Cooled - Standard Cube (Continued)

    UG18A SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Air Temp. Entering Water Temperature °C Condenser °C 19.96 18.06 17.93 13.51 9.19 7.10 Based on average ice weight of 0.29 - 0.32 kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 16 Continued on next page …...

  • Page 94: Ug18A Self-Contained Air-Cooled - Standard Cube (Continued)

    UG18A 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 4.87-3.66 0.64-0.07 3.19-5.55 1.05-3.41 8.05-5.94 1.24-0.22 3.80-6.03 2.45-3.80 10.20-6.67 1.32-0.57 5.38-10.89 2.86-4.08 13.8-6.87 1.63-0.76 6.87-14.07 3.49-5.79 All pressures are in bar.

  • Page 95: Cube

    UG020A 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 Water Temperature °C Harvest Time Condenser °C 15.37-17.95 15.67-18.16 16.22-19.31 1.4-3.5 min.

  • Page 96: Ug020A Self-Contained Air-Cooled - Standard Cube (Continued)

    UG020A SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Air Temp. Entering Water Temperature °C Condenser °C 21.37 21.57 21.03 16.89 14.06 11.32 Based on average ice weight of 0.43 - 0.48kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 4...

  • Page 97: Ug020A Self-Contained Air-Cooled - Standard Cube (Continued)

    UG020A 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 5.06-4.46 0.70-0.0.17 4.39-7.59 1.47-4.10 6.77-6.34 0.84-0.22 4.99-8.02 1.54-4.20 9.92-9.00 0.92-0.27 5.17-9.49 2.35-5.06 15.06-12.85 1.06-0.40 7.62-12.18 3.09-6.69 All pressures are in bar.

  • Page 98: Ug030A-251 Self-Contained Air-Cooled - Standard Cube

    UG030A-251 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 Water Temperature °C Harvest Time Condenser °C 16.41-19.84 17.53-18.96 18.21-20.45 1.4-3.5 min.

  • Page 99: Ug030A-251 Self-Contained Air-Cooled - Standard Cube

    UG030A-251 SELF-CONTAINED AIR-COOLED — STANDARD CUBE 24 Hour Ice Production Air Temp. Entering Water Temperature °C Condenser °C 28.37 30.96 29.81 25.48 20.66 16.11 Based on average ice weight of 0.43 - 0.48kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 4 Continued on next page …...

  • Page 100: Ug030A-251 Self-Contained Air-Cooled - Standard Cube (Continued)

    UG030A-251 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 4.21-3.20 0.50-0 7.00-8.88 1.16-4.16 7.98-6.61 0.54-0 7.50-9.30 1.58-4.38 11.40-8.91 0.62-0.37 7.78-11.48 1.99-5.40 15.48-13.21 1.46-0.71 10.43-12.59 3.15-6.10 All pressures are in bar.

  • Page 101: Ug030A-261 Self-Contained Air-Cooled - Standard Cube

    UG030A-261 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 Water Temperature °C Harvest Time Condenser °C 16.53-20.72 16.15-17.46 1.4-3.5 min.

  • Page 102: Ug030A-261 Self-Contained Air-Cooled - Standard Cube

    UG030A-261 SELF-CONTAINED AIR-COOLED — STANDARD CUBE 24 Hour Ice Production Air Temp. Entering Water Temperature °C Condenser °C 29.06 33.41 29.34 25.06 22.79 Based on average ice weight of 0.43 - 0.48kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 4 Continued on next page …...

  • Page 103: Dard Cube (Continued)

    UG030A-261 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 5.11-4.37 0.32-0 4.74-10.91 1.10-2.01 7.78-5.61 0.64-0.20 5.50-11.30 1.28-2.38 10.40-7.51 0.88-0.24 7.08-13.98 1.79-3.20 14.92-13.89 1.35-0.655 9.73-17.59 2.35-4.10 All pressures are in bar.

  • Page 104: Ug030A-161 Self-Contained Air-Cooled - Standard Cube

    UG030A-161 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 Water Temperature °C Harvest Time Condenser °C 19.84-23.72 19.23-19.99 1.8-3.6min.

  • Page 105: Ug030A-161 Self-Contained Air-Cooled - Standard Cube

    UG030A-161 SELF-CONTAINED AIR-COOLED — STANDARD CUBE 24 Hour Ice Production Air Temp. Entering Water Temperature °C Condenser °C 25.31 29.5 22.98 17.66 14.52 Based on average ice weight of 0.43 - 0.48kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 4 Continued on next page …...

  • Page 106: Ug030A-161 Self-Contained Air-Cooled - Standard Cube (Continued)

    UG030A-161 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 5.11-3.20 0.55-0.22 5.00-9.88 1.10-2.96 7.88-5.81 0.58-0.39 5.50-9.30 1.38-2.98 9.90-6.91 2.30-0.82 6.78-12.48 2.99-3.20 14.18-10.21 2.47-0.89 8.53-17.59 3.00-3.40 All pressures are in bar.

  • Page 107: Ug030W Self-Contained Water--Cooled

    UG030W SELF-CONTAINED WATER--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 Water Temperature °C Harvest Time Condenser °C 18.07-19.54 19.67-20.92 20.82-21.77 1.4-3.5 min.

  • Page 108: Ug030W Self-Contained Water--Cooled

    UG030W SELF-CONTAINED WATER--COOLED — STANDARD CUBE 24 Hour Ice Production Air Temp. Entering Water Temperature °C Condenser °C 30.17 29.27 28.07 23.79 22.34 21.01 Based on average ice weight of 0.43 - 0.48kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 4...

  • Page 109: Ug030W Self-Contained Water--Cooled

    UG030W SELF-CONTAINED WATER--COOLED — STANDARD CUBE (Continued) Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 7.31-9.50 3.97-6.77 2.27-4.82 7.46-9.60 4.10-7.04 2.46-5.04 8.53-9.75 4.50-8.28 2.65-3.47 9.85-10.80 4.95-11.34 2.58-6.05 All pressures are in bar. Suction pressure drops gradually throughout the freeze cycle.

  • Page 110: Ug040A-251 Self-Contained Air-Cooled - Standard Cube

    UG040A-251 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 Water Temperature °C Harvest Time Condenser °C 17.5-21.73 19.53-22.26 21.17-23.92 1.4-3.5 min.

  • Page 111: Ug040A-251 Self-Contained Air-Cooled - Standard Cube (Continued)

    UG040A-251 SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Air Temp. Entering Water Temperature °C Condenser °C 43.52 46.5 44.39 39.28 31.08 24.90 Based on average ice weight of 0.72- 0.80kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 40 Continued on next page …...

  • Page 112: Ug040A-251 Self-Contained Air-Cooled - Standard Cube (Continued)

    UG040A-251 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 9.24-6.98 2.15-1.20 7.35-13.63 5.38-5.88 14.21-8.98 2.22-1.80 7.40-13.64 5.38-5.88 19.13-17.53 2.92-2.20 8.34-18.36 6.33-6.57 25.16-22.01 3.82-2.60 8.80-23.30 6.60-7.25 All pressures are in bar.

  • Page 113: Ug040A-261 Self-Contained Air-Cooled - Standard Cube

    UG040A-261 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 Water Temperature °C Harvest Time Condenser °C 21.76-24.29 20.16-22.36 1.6-4.0min.

  • Page 114: Ug040A-261 Self-Contained Air-Cooled - Standard Cube (Continued)

    UG040A-261 SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Air Temp. Entering Water Temperature °C Condenser °C 39.36 43.78 40.71 34.12 29.9 Based on average ice weight of 0.72- 0.80kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 40 Continued on next page …...

  • Page 115: Ug040A-261 Self-Contained Air-Cooled - Standard Cube (Continued)

    UG040A-261 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 11.24-9.18 1.95-1.40 7.35-10.63 5.38-5.88 14.91-12.68 2.42-1.53 8.40-11.84 5.38-8.88 19.93-17.33 2.92-2.10 8.74-14.36 6.33-10.87 25.66-22.01 3.82-2.70 9.80-15.90 7.60-12.25 All pressures are in bar.

  • Page 116: Ug050A-251 Self-Contained Air-Cooled - Standard Cube

    UG050A-251 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 Water Temperature °C Harvest Time Condenser °C 13.93-14.89 17.41-18.06 18.38-19.48 1.4-3.5 min.

  • Page 117: Ug050A-251 Self-Contained Air-Cooled - Standard Cube (Continued)

    UG050A-251 SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Air Temp. Entering Water Temperature °C Condenser °C 61.94 56.16 53.90 43.22 34.55 28.38 Based on average ice weight of 0.72- 0.80kg per cycle. Individual cube weight 19 grams ±1.

  • Page 118: Ug050A-251 Self-Contained Air-Cooled - Standard Cube (Continued)

    UG050A-251 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 12.00-10.60 3.51-1.37 7.22-8.22 4.78-6.34 15.62-12.69 3.90-1.42 8.64-10.16 6.32-7.93 20.24-18.37 4.75-1.67 11.53-12.70 7.60-10.13 25.50-23.00 4.84-1.65 12.25-14.20 9.00-11.56 All pressures are in bar.

  • Page 119: Ug050W Self-Contained Water-Cooled

    UG050W SELF-CONTAINED WATER-COOLED NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Water Temperature °C Harvest Time Condenser °C 16.32-18.56 16.71-19.11 17.37-19.78 1.4-3.5 min. 20.54-21.62 23.49-23.92 23.05-24.58...

  • Page 120: Ug050W Self-Contained Water-Cooled

    UG050W SELF-CONTAINED WATER-COOLED 24 Hour Ice Production Air Temp. Entering Water Temperature °C Condenser °C 52.51 51.17 50.44 41.6 Based on average ice weight of 0.72- 0.80kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle: 4 0...

  • Page 121: Ug050W Self-Contained Water-Cooled

    UG050W SELF-CONTAINED WATER-COOLED Operating Pressures Freeze Cycle Harvest Cycle Air Temp. Entering Condenser °C Discharge Pressure Suction Pressure Discharge Pressure Suction Pressure 13.33-9.09 3.44-2.04 6.40-7.83 4.75-6.41 13.39-12.45 3.60-1.35 6.75-10.55 5.10-6.30 15.96-15.95 4.40-1.34 8.43-12.43 6.20-6.20 17.18-16.40 5.00-1.75 8.57-17.62 6.81-6.63 All pressures are in bar. Suction pressure drops gradually throughout the freeze cycle.

  • Page 122: Ug065Ag-251G Self-Contained Air-Cooled - Standard Cube

    UG065AG-251G 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 Water Temperature °C Harvest Time Condenser °C 18.8-21.62 18.44-19.86 19.89-21.6 1.4-3.5 min.

  • Page 123: Ug065 Self-Contained Air-Cooled - Standard Cube (Continued)

    UG065 SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Air Temp. Entering Water Temperature °C Condenser °C 62.13 66.90 64.85 59.09 48.69 39.21 Based on average ice weight of1.01- 1.12kg per cycle. Individual cube weight 19 grams ±1. Number of individual cubes per cycle:56 Continued on next page …...

  • Page 124: Ug065 Self-Contained Air-Cooled - Standard Cube (Continued)

    UG065 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 8.68-20.50* 11.23-14.60 6.37-8.40 13.50-12.66 1.88-1.40 11.25-14.65 6.40-8.51 19.04-17.06 2.43-1.85 11.33-16.65 6.53-10.02 25.01-22.24 3.15-2.65 13.34-19.87 8.02-12.20 All pressures are in bar.

  • Page 125: Ug080A Self-Contained Air-Cooled - Standard Cube

    UG080A 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 Water Temperature °C Harvest Time Condenser °C 12.96-13.12 13.84-16.38 14.58-17.02...

  • Page 126: Ug080A Self-Contained Air-Cooled - Standard Cube (Continued)

    UG080A SELF-CONTAINED AIR-COOLED — STANDARD CUBE (Continued) 24 Hour Ice Production Air Temp. Entering Water Temperature °C Condenser °C 88.68 85.75 84.78 66.76 55.64 47.87 Based on average ice weight of1.01- 1.12kg per cycle. Individual cube weight 19 grams ±1.

  • Page 127: Cube (Continued)

    UG080A 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 13.42-28.07* 4.75-3.50 12.60-13.90 8.70-10.40 16.60-13.85 4.91-3.50 12.65-13.90 8.70-10.45 21.00-17.90 5.38-3.70 12.80-14.01 8.75-10.47 25.83-24.30 25.20-4.20 14.25-15.82...
  • Page 128 This Page Intentionally Left Blank...

  • Page 129: Diagrams

    Diagrams Wiring Diagram UG18/UG20 AIR-COOLED UG18/20 MACHINES - WIRING DIAGRAM SELF-CONTAINED 1 PHASE SEE SERIAL PLATE FOR VOLTAGE CAUTION: DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY. L2 (N) DIAGRAM SHOWN DURING FREEZE CYCLE WATER PUMP (16)ORG (13) HOT GAS MODE SWITCH SOLENOID (24) RELAY/...

  • Page 130: Ug30/Ug50/Ug65 Air-Cooled

    UG30/UG50/UG65 AIR-COOLED UG30/40/50/65 SERIES MACHINES - WIRING DIAGRAM SELF-CONTAINED 1 PHASE SEE SERIAL PLATE CAUTION: DISCONNECT POWER BEFORE WORKING FOR VOLTAGE ON ELECTRICAL CIRCUITRY. L2 (N) DIAGRAM SHOWN DURING FREEZE CYCLE WATER PUMP (24) (16)ORG MODE SWITCH START RELAY/ START OVERLOAD RELAY COMPRESSOR...
  • Page 131 UG80 AIR-COOLED UG80 MACHINES - WIRING DIAGRAM SELF-CONTAINED 1 PHASE SEE SERIAL PLATE CAUTION: DISCONNECT POWER BEFORE WORKING FOR VOLTAGE ON ELECTRICAL CIRCUITRY. L2 (N) DIAGRAM SHOWN DURING FREEZE CYCLE WATER PUMP (24) (16)ORG MODE SWITCH COMPRESSOR RELAY START (50) CLEAN CAPACITOR (18)BRN...

  • Page 132: Ug30/Ug50 Water-Cooled

    UG30/UG50 WATER-COOLED UG30/50W SERIES MACHINES - WIRING DIAGRAM SELF-CONTAINED 1 PHASE SEE SERIAL PLATE CAUTION: DISCONNECT POWER BEFORE WORKING FOR VOLTAGE ON ELECTRICAL CIRCUITRY. L2 (N) DIAGRAM SHOWN DURING FREEZE CYCLE (26) WATER PUMP (24) H.P. CUTOUT (16)ORG (WATER COOLED ONLY) MODE SWITCH START RELAY/...

  • Page 133: Tubing Schematics

    Tubing Schematics UG18/UG20/UG30/UG40/UG65 TUBING SCHE- MATIC 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 –123–...

  • Page 134: Ug50/Ug80 Tubing Schematic

    UG50/UG80 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 –124–...
  • Page 135 –125–...
  • Page 136 Manitowoc (China) Foodservice Co., Ltd. No.151 Jianye Road, Binjiang District, Hangzhou, China 310011 Website – www.manitowocice.com ©2014 Manitowoc Ice –126–...

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