The provided information does not indicate that clearing all ice cubes from the Manitowoc UG Series ice cube machine will damage the coil. There is no mention of such damage occurring from this action.

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Summary of Contents for Manitowoc UG Series

Page 1 UnderCounter Ice Machines UG Series Technician’s Handbook Part Number: 040006847 12/19...
Page 3 Safety Notices Read these precautions before any operation: • Read this manual thoroughly before operating, installing or performing maintenance on the equipment. Failure to follow instructions may result in personal injury and damage to the ice machine. • Routine adjustments, maintenance and cleaning procedures outlined in this manual are not covered by the warranty.
Page 4 Definitions DANGER Indicates a hazardous situation that, if not avoided, may result in death or serious injury. This applies to the most extreme situations. Warning Indicates a hazardous situation that, if not avoided, may result in death or serious injury. Caution Indicates a hazardous situation which, if not avoided, may result in minor or moderate injury.
Page 5 Warning Follow these electrical requirements during installation of this equipment: • All field wiring must conform to all applicable codes of the authority having jurisdiction. It is the responsibility of the end user to provide the disconnect means to satisfy local codes. Refer to rating plate for proper voltage.
Page 6 DANGER Do not operate equipment that has been misused, abused, neglected, damaged, or altered/modified from that of original manufactured specifications. This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision concerning use of the appliance by a person responsible for their safety.
Page 7 Warning Follow these precautions to prevent personal injury during installation of this equipment: • Installation must comply with all applicable equipment, fire and health codes with the authority having jurisdiction. • Connect to a potable water supply only. • To avoid instability, the installation area must be capable of supporting the combined weight of the equipment and product.
Page 8 Warning Follow these precautions to prevent personal injury during use and maintenance of this equipment: • It is the responsibility of the end user to perform a Personal Protective Equipment Hazard Assessment to ensure adequate protection during maintenance procedures. • Do not store or use gasoline or other flammable vapors or liquids in the vicinity of this or any other appliance.
Page 9 • Do not use high-pressure water guns to spray or rinse the interior or exterior of the unit. Do not use power cleaning equipment, steel wool, wire brushes, scrapers, etc. to clean the exterior of the equipment. • To prevent tipping, two or more people are needed to move this appliance.
Page 10 Warning When installing, using, or servicing this equipment, follow these flammable refrigeration system requirements. • Refer to the nameplate - The ice machine may contain up to 150 grams of R290 (propane) refrigerant. R290 (propane) is flammable in concentrations of air between approximately 2.1% and 9.5% by volume.
Page 11 Warning Follow these precautions to prevent personal injury while operating or maintaining this equipment: • Refer to nameplate to identify the type of refrigerant in your equipment. • Only trained and qualified personnel aware of the dangers are allowed to work on the equipment. •...
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Page 13: Table Of Contents
Table of Contents General Information Model Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 This manual covers the following ice machine models: .
Page 14 Maintenance General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36 Cleaning/Descaling &...
Page 15 Component Check Procedures Electrical Components . . . . . . . . . . . . . . . . . . . . . . . . . . 67 ON/OFF/Wash Toggle Switch .
Page 16 Charts Cycle Times/24-Hour Ice Production/Refrigerant Pressure Charts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93 UGP020 Self-Contained Air-Cooled .
Page 17: General Information
General Information Model Numbers THIS MANUAL COVERS THE FOLLOWING ICE MACHINE MODELS: Self-Contained Air-Cooled UGE0020A UGP0020A UGE0030A UGP0030A UGF0040A UGP0040A UGF0050A UGP0050A UGF0065A ---- UGF0080A UGP0080A NOTE: The model suffix is used to identify the voltage, special model, or country-specific model. See “How to Read A Model Number”...
Page 18: How To Read A Model Number
How to Read A Model Number Part Number: 040006847 12/19...
Page 19: Model/Serial Number Location
Model/Serial Number Location Model/Serial Number Location Part Number: 040006847 12/19...
Page 20: Warranty
Warranty For warranty information visit: www.manitowocice.com/Service/Warranty • Warranty Coverage Information • Warranty Registration • Warranty Verification Warranty coverage begins the day the ice machine is installed. WARRANTY REGISTRATION Completing the warranty registration process is a quick and easy way to protect your investment. Scan the QR code with your smart device or enter the link in a web browser to complete your warranty registration.
Page 21: Installation
Installation General These instructions are provided to assist the qualified installer. Ice Machine Dimensions Model UG0020 UG0030 UG0040 UG0050 UG0065 UG0080 Part Number: 040006847 12/19...
Page 22: Location Of Ice Machine
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. 1. The location must be indoors and free from airborne and other contaminants. 2.
Page 23: Leveling The Ice Machine
Leveling the Ice Machine 1. Screw the legs or levelers into the bottom plate of the ice machine. 2. Screw the foot of each leg or leveler in as far as possible. Move the ice machine into its final position. 3.
Page 24: Water Service/Drains
Important When installing a Manitowoc water filtration system, be sure to follow the instructions provided with the filtration system for pipe installation. Follow these guidelines to install the water inlet lines: 1.
Page 25 Water Supply and Drain Line Sizing/Connections Ice Making Water Inlet Drain Connection Outlet Inlet water 50°F (10°C) Min. temperature 90°F (32°C) Max. Inlet Water 20 psi (140 kPa) Min. Pressure 80 psi (550 kPa) Max. Ice Machine 3/4” male pipe thread 7/8”...
Page 26: Electrical Service
Electrical Service Warning The ice machine must be grounded in accordance with national and local electrical codes. Do not use any extension cords. If the supplied power cord is not long enough to reach the socket, a designated socket should be installed close to the ice machine. VOLTAGE The maximum allowable voltage variation is ±6% of the rated voltage at start-up of the ice machine’s compressor.
Page 27 Warning Risk of Electric Shock - For hard wired (wired without a plug) machine, it must be properly grounded and connected to the field wiring terminal in accordance with all applicable national and local electrical codes by a qualified electrician. Before connecting wires, disconnect power at the electrical disconnect and lock out to prevent accidentally energizing.
Page 28: Installation Checklist
Are all electrical leads free from contact with refrigeration lines and moving equipment? Has the owner/operator been instructed regarding maintenance and the use of Manitowoc Cleaner and Sanitizer? Has the owner/operator completed the warranty registration? Has the ice machine and bin been sanitized?
Page 29: Before Starting The Ice Machine
Before Starting the Ice Machine All Manitowoc ice machines are factory-operated and adjusted before shipment. Normally, new installations do not require any adjustment. To ensure proper operation, follow the Operational Checks as specified in Section 3. Completing the Operational Checks is the responsibilities of the owner.
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Page 31: Operation
Operation Component Identification Water Curtain Water Sump Trough Control Board Air Cooled Condenser On-off-wash Toggle Switch Evaporator Ice Chute Spray Nozzles Spray Bar Part Number: 040006847 12/19...
Page 32: Ice Making Sequence Of Operation
Ice Making Sequence of Operation INITIAL START-UP 1. Water Inlet and Pressure Equalization Turn the toggle switch to the “ON” position, the water fill valve and harvest valve are energized, and 300 seconds later, the water fill valve is de-energized. 20 seconds after the harvest valve solenoid is energized, the compressor is energized.
Page 33 3. Harvest Cycle The compressor continues to operate and the water pump is de-energized. The hot gas valve energizes, allowing hot refrigerant vapor 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 34: Operational Checks
Operational Checks GENERAL Your ice machine was factory-operated and adjusted before shipment. Normally, a newly installed ice machine does not require any adjustment. To ensure proper operation, always follow these Operational Checks when starting the ice machine: • for the first time; •...
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. Check and adjust according to the following steps: 1. Allow the ice machine to operate for three complete cycles.
Page 36: General
A dirty ice machine must be disassembled, descaled, and sanitized. Manitowoc ice machine cleaner/descaler and sanitizer are the only products approved for use on Manitowoc ice machines. Caution Use only Manitowoc approved cleaner/descaler (Part Number 9405463) and sanitizer (Part Number 9405653).
Page 37: Cleaning/Descaling & Sanitizing Procedure
Cleaning/Descaling & Sanitizing Procedure Descale and sanitize the ice machine at least every six months. • The ice machine and storage bin should be descaled and sanitized separately. • All ice cubes must be discarded during descaling and sanitizing. • Remove all mineral deposits in areas in direct contact with water.
Page 38: Exterior Cleaning
EXTERIOR CLEANING Clean the area around the ice machine as often as necessary to maintain cleanliness and efficient operation. Wipe any dust and dirt off the surface of the ice machine with a damp cloth, and wipe any oil off with a cloth dampened with a soap solution.
Page 39: Detailed Descaling & Sanitizing Procedure
Detailed Descaling & Sanitizing Procedure Caution Use only Manitowoc approved cleaner/descaler (Part Number 9405463) and sanitizer (Part Number 9405653). Failure to follow the instructions on the label will violate relevant laws. Read and understand all instructions on the package before use.
Page 40 Mix 4 liters of water with 500 ml of cleaner/ Step 4 descaler in a plastic or stainless steel container to prepare a cleaning solution. Cleaner/Descaler Water 500 ml (16 oz) 4 L (1 gal) Take all components to sink and with 2 liters Step 5 descaler/water mixture, descale all components with a soft nylon brush.
Page 41 After the rinse cycle is complete, remove the Step 10 water sump overflow tube. Drain water from the sump and replace the tube. Mix 60 ml of sanitizer with 12 l of water in a plastic or stainless steel container to make a sanitizing solution.
Page 42 Replace all the removed parts, then turn on the Step 17 water supply switch. Place the toggle switch in the ON position, and Step 18 the ice machine will start a new ice making cycle. NOTE: To terminate a clean cycle, press the toggle switch in the WASH position and hold for more than 30 seconds.
Page 43: 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 the two screws and slide the top cover backwards to remove.
Page 44: Water Curtain
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. Grasp one end of the water curtain and lift up. To re-install the water curtain, into ice machine, pivot the water curtain and pull it down into position.
Page 45: Water Shutters
WATER SHUTTERS 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. Grasp one end of the water curtain and lift up. To re-install the water curtain, into ice machine, pivot the water curtain and pull it down into position.
Page 46: Ice Chute
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 47: 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 it up and remove from the seat formed in the water trough.
Page 48: Sump Drain Overflow Tube
SUMP DRAIN OVERFLOW TUBE The sump drain overflow tube is located in the evaporator water sump: 1. Remove the water curtain and ice chute. 2. Lift spray bar or disconnect and remove for easiest access. 3. Pull up on the overflow tube to remove. 4.
Page 49: Cleaning The Condenser
Cleaning the Condenser Warning Disconnect electric power to the ice machine before performing maintenance on equipment. AIR-COOLED CONDENSER A dirty condenser restricts airflow, resulting in excessively high operating temperatures. This reduces ice production and shortens component life. Clean the condenser at least every six months. 1.
Page 50: Removal From Service/Winterization
Removal from Service/Winterization General Special precautions must be taken if the ice machine is to be removed from service for an extended period of time or exposed to ambient temperatures of 32 °F (0 °C) or below. Caution If water is allowed to remain in the ice machine in freezing temperatures, severe damage to some components could result.
Page 51: Troubleshooting
Troubleshooting Questions to Ask The Customer An ice machine may manifest problems only at certain times of a day, but operate normally otherwise. Asking the user for some information can be helpful for assessment or even crucial in the final diagnosis. Ask these questions before service: •...
Page 52: Ice Machine Will Not Run
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 diagnostic (water pump won’t run, compressor won’t run, etc).
Page 53 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 (49°C/120°F or below) to ensure that the overload is closed and the resistance readings will be accurate.
Page 54 CHECK MOTOR WINDINGS TO GROUND Check continuity between all three terminals and the compressor shell or copper refrigeration line. Scrape metal surface to get good contact. If continuity is present, the compressor windings are grounded and the compressor should be replaced. To determine if the compressor is seized: check the amp draw while the compressor is trying to start.
Page 55 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 56: Water Pump Won't Run
WATER PUMP WON’T RUN Is the water pump winding closed? 1. Yes - Repair or replace the pump. 2. No - Is the water pump relay LED on the control board lit? • Yes: Repair or replace the motor. • No: Repair or replace the control board.
Page 57: Ice Machine Prematurely Harvests
Ice Machine Prematurely Harvests 1. Is there line voltage at the hot gas valve? • No - Replace the hot gas valve. 2. Has the dip switch been adjusted? • Yes - Refer to “Ice Cube Thickness Check” and increase the cube size (increase the ice freeze time).
Page 58: 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 IS NOT BETWEEN 1.4 AND 5.5 BAR (20-80PSI) •...
Page 59: 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 21 °C (70°F) ambient temperature and 10°C (50°F) supply water produces more ice than the same model ice machine with a 32 °C (90°F) ambient temperature 21 °C (70°F) supply water.
Page 60 4. Perform an ice production check using the formula below. Freeze Time Harvest Time = Total Cycle Time 1440 = Minutes ÷ Total Cycle Time = Cycles per Day in 24 Hrs. Weight of One Actual 24-Hour × Cycles per Day Harvest Production Weighing the ice is the only 100% accurate check.
Page 61: Analyzing Discharge Pressure
Analyzing Discharge Pressure 1. Determine the ice machine operating conditions: • Air temperature entering condenser: • Ambient temperature: • Water temperature entering sump trough: 2. Refer to the Cycle Times/24 Hour Ice Production/ Refrigeration Pressure Chart for the ice machine being checked.
Page 62: Discharge Pressure High Checklist
Discharge Pressure High Checklist Improper Installation • Refer to “Installation” section 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 63: Suction Pressure High Checklist
Suction Pressure High Checklist Improper Installation • Refer to “Installation” section Discharge Pressure • A high discharge pressure will affect the suction pressure. Refer to “Discharge Pressure High Checklist” Improper Refrigerant Charge • Overcharged • Non-condensable in system • Wrong type of refrigerant Other •...
Page 64: Suction Pressure Low Checklist
Suction Pressure Low Checklist Improper Installation • Refer to “Installation” section Discharge Pressure • A high discharge pressure will affect the suction pressure. Refer to “Discharge Pressure High Checklist” Improper Refrigerant Charge • Undercharged • Wrong type of refrigerant Other •...
Page 65: Discharge Line Temperature Analysis
Discharge Line Temperature Analysis General The temperature of the compressor discharge line 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 66 Procedure Connect a temperature probe on the compressor discharge line. Observe the discharge line temperature and record the maximum reading. 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 (155°F).
Page 67: Component Check Procedures
Component Check Procedures Electrical Components ON/OFF/WASH 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.
Page 68: 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 69 Check Procedure Warning Disconnect electrical power to the entire ice machine before proceeding. Make sure bulb is inserted correctly 35.5 cm (14") 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...
Page 70: Sump Water Thermistor (T1) & Liquid Line
SUMP WATER THERMISTOR (T1) & LIQUID LINE THERMISTOR (T2) Function The sump water thermistor sensor is immersed in water to detect the sump temperature. The value supplied to the control board is used to initiate a freeze cycle. The liquid line thermistor senses the refrigeration system liquid line temperature.
Page 71 T1 & T3 TEMPERATURE/RESISTANCE CHART Important If the ohmmeter reads “OL,” check the scale setting on the meter before assuming the thermistor is bad. Temperature Resistance Temperature Resistance K Ohms K Ohms ̊ C ̊ C (×1000) (×1000) 344.6 4.771 320.5 4.567 298.2...
Page 72 Temperature Resistance Temperature Resistance K Ohms K Ohms ̊ C ̊ C (×1000) (×1000) 65.58 1.731 69.70 1.797 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 34.56 1.158 32.68 1.117 30.92...
Page 73 Temperature Resistance Temperature Resistance K Ohms K Ohms ̊ C ̊ C (×1000) (×1000) 14.75 0.6715 14.02 0.6501 13.33 0.6293 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...
Page 74 T2 TEMPERATURE/RESISTANCE CHART Important If the ohmmeter reads “OL,” check the scale setting on the meter before assuming the thermistor is bad. Temperature Resistance Temperature Resistance K Ohms K Ohms ̊ C ̊ C (×1000) (×1000) 225.1 6.623 212.8 6.387 200.6 6.162 189.3...
Page 75 Temperature Resistance Temperature Resistance K Ohms K Ohms ̊ C ̊ C (×1000) (×1000) 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 45.43 2.428 43.30 2.354 41.27 2.283 39.36 2.214 37.55 2.147 35.83 2.082 34.19 2.020 32.65...
Page 76 Temperature Resistance Temperature Resistance K Ohms K Ohms ̊ C ̊ C (×1000) (×1000) 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 11.70 0.9838 11.24 0.9572 10.81 0.9316 10.40 0.9066 10.00...
Page 77: 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: 1.
Page 78 VALVE REMAINS OPEN IN THE FREEZE CYCLE: Symptoms of a hot gas valve remaining partially open during the freeze cycle can be similar to symptoms of an expansion valve, capillary tube or compressor problem. Symptoms are dependent on the amount of leakage in the freeze cycle.
Page 79 4. Compare the temperature of the inlet of the hot gas valve to the temperature of the compressor discharge line. Findings Comments This is normal as the discharge line The inlet of the hot should always be too hot to touch and gas valve is cool the harvest valve inlet, although too hot enough to touch...
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Page 81: Flammable Refrigerant Procedures
Flammable Refrigerant Procedures Servicing Requirements • It is recommended that only technicians specifically trained in handling flammable refrigerants, service or dispose of equipment containing hydrocarbon refrigerants. • Color-coded red process tubes indicate use of a flammable refrigerant - Process tubes must be replaced after brazing or other service procedures.
Page 82: Refrigerant Purging Requirements
REFRIGERANT PURGING REQUIREMENTS NOTE: Country and Local Codes for removal and processing of this refrigerant must always take precedence over these procedures. • Minimum of 10 feet from building, verify wind direction will not introduce refrigerant into building • Verify refrigerant does not enter buildings through intake air vents •...
Page 83: Refrigerant Purging Procedure
REFRIGERANT PURGING PROCEDURE 1. Disconnect all electric power to the system and lockout tag out the power source(s). NOTE: Some systems may have more than one power supply. 2. Work in well-ventilated, open space and eliminate all ignition sources. 3. Install piercing valves on the high and low side access fittings.
Page 84: Pressure Testing
PRESSURE TESTING 11. Pressure test with dry nitrogen to detect leaks. Use nitrogen and a trace amount of refrigerant to locate the leak if a pressure test indicates a leak is present. 12. Do not over pressurize the system. Check the name plate for the maximum test pressure.
Page 85: Refrigerant Charging
Important The charge is critical on all Manitowoc ice machines. Use a scale to ensure the proper charge is installed. A quick disconnect is required for the high side connection 16.
Page 86 NOTE: Manifold gauge set must be removed properly to ensure no refrigerant contamination or loss occurs. 18. Verify all of the vapor in the charging hoses is drawn into the refrigeration system before disconnecting the charging hoses. Run the ice machine in freeze cycle. Remove the high side low loss fitting.
Page 87: System Contamination Cleanup
System Contamination Cleanup This section describes the basic requirements for restoring contaminated systems to reliable service. DETERMINING SEVERITY OF CONTAMINATION System contamination is generally caused by either moisture or residue from compressor burnout entering the refrigeration system. Inspection of the refrigerant usually provides the first indication of system contamination.
Page 88 Contamination/Cleanup Chart Symptoms/Findings Required Cleanup Procedure No symptoms or suspicion of Normal evacuation/ contamination recharging procedure Moisture/Air Contamination symptoms Mild contamination Refrigeration system open to atmosphere cleanup procedure for longer than 15 minutes Refrigeration test kit and/or acid oil test shows contamination No burnout deposits in open compressor lines...
Page 89: Mild System Contamination Cleanup Procedure
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 90: Severe System Contamination Cleanup Procedure
SEVERE SYSTEM CONTAMINATION CLEANUP PROCEDURE 1. Remove the refrigerant charge. 2. Remove the compressor. 3. If burnout deposits are found, replace the TXV. 4. Wipe away any burnout deposits from suction and discharge lines at compressor. 5. Sweep through the open system with dry nitrogen. 6.
Page 91 10. Charge the system with the proper refrigerant to the nameplate charge. 11. Operate the ice machine for one hour. Then, check the pressure drop across the suction line filter-drier. If the pressure drop is less than 2 psig, the filter- drier should be adequate for complete cleanup.
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Page 93: Cycle Times/24-Hour Ice Production/Refrigerant
Charts Cycle Times/24-Hour Ice Production/ 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. • Exclude all non-refrigeration issues before diagnosing the refrigeration system. •...
Page 94: Ugp020 Self-Contained Air-Cooled
UGP020 SELF-CONTAINED AIR-COOLED NOTE: These characteristics may vary depending on operating conditions. Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Ambient Freeze Time Harvest Temperature Water Temperature °F/°C Time °F/°C 50/10 70/21 90/32 70/21 15.0-16.9 80/27 90/32 21.0-23.6 1.6 - 3.5...
Page 95: Ugp020 Operating Temperatures
Part Number: 040006847 12/19...
Page 96: Ugp030 Self-Contained Air-Cooled
UGP030 SELF-CONTAINED AIR-COOLED NOTE: These characteristics may vary depending on operating conditions. Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Ambient Freeze Time Harvest Temperature Water Temperature °F/°C Time °F/°C 50/10 70/21 90/32 70/21 16.3-18.3 80/27 90/32 21.0-23.6 1.6-3.5...
Page 97: Ugp030 Operating Temperatures
Part Number: 040006847 12/19...
Page 98: Ugp040 Self-Contained Air-Cooled
UGP040 SELF-CONTAINED AIR-COOLED NOTE: These characteristics may vary depending on operating conditions. Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Ambient Freeze Time Harvest Temperature Water Temperature °F/°C Time °F/°C 50/10 70/21 90/32 70/21 18.6-20.8 80/27 90/32 24.1-26.8 1.6-3.5...
Page 99: Ugp040 Operating Temperatures
Part Number: 040006847 12/19...
Page 100: Ugp080 Self-Contained Air-Cooled
UGP080 SELF-CONTAINED AIR-COOLED NOTE: These characteristics may vary depending on operating conditions. Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Ambient Freeze Time Harvest Temperature Water Temperature °F/°C Time °F/°C 50/10 70/21 90/32 70/21 18.0-20.1 80/27 90/32 20.9-23.3 1.6-3.5...
Page 101: Ugp080 Operating Temperatures
Part Number: 040006847 12/19...
Page 102 UGE0020A Self-Contained Air-Cooled These characteristics may vary depending on operating conditions. TOTAL CYCLE TIME Freeze Time + Harvest Time = Total Cycle Time Freeze Time Ambient Harvest Temperature Water Temperature °F/°C Time °F/°C 50/10 70/21 90/32 50/10 15.4-18.0 70/21 15.7-18.2 1.4-3.5 90/32 21.7-25.5...
Page 103: Uge0030A Self-Contained Air-Cooled
UGE0030A SELF-CONTAINED AIR-COOLED These characteristics may vary depending on operating conditions. TOTAL CYCLE TIME Freeze Time + Harvest Time = Total Cycle Time Freeze Time Ambient Harvest Temperature Water Temperature °F/°C Time1 °F/°C 50/10 70/21 90/32 50/10 16.4-19.8 70/21 17.5-19.0 1.4-3.5 90/32 22.4-25.0...
Page 104: Ugf0040A Self-Contained Air-Cooled
UGF0040A SELF-CONTAINED AIR-COOLED These characteristics may vary depending on operating conditions. TOTAL CYCLE TIME Freeze Time + Harvest Time = Total Cycle Time Freeze Time Ambient Harvest Temperature Water Temperature °F/°C Time °F/°C 50/10 70/21 90/32 50/10 17.5-21.7 70/21 19.5-22.3 1.4-3.5 90/32 24.4-28.9...
Page 105: Ugf0050A Self-Contained Air-Cooled
UGF0050A SELF-CONTAINED AIR-COOLED These characteristics may vary depending on operating conditions. TOTAL CYCLE TIME Freeze Time + Harvest Time = Total Cycle Time Freeze Time Ambient Harvest Temperature Water Temperature °F/°C Time °F/°C 50/10 70/21 90/32 50/10 13.9-14.9 70/21 17.4-18.1 1.4-3.5 90/32 23.6-25.5...
Page 106: Ugf0065A Self-Contained Air-Cooled
UGF0065A SELF-CONTAINED AIR-COOLED These characteristics may vary depending on operating conditions. TOTAL CYCLE TIME Freeze Time + Harvest Time = Total Cycle Time Freeze Time Ambient Harvest Temperature Water Temperature °F/°C Time °F/°C 50/10 70/21 90/32 50/10 18.8-21.6 70/21 18.4-19.9 1.4-3.5 90/32 23.0-24.9...
Page 107: Ugf0080A Self-Contained Air-Cooled
UGF0080A SELF-CONTAINED AIR-COOLED These characteristics may vary depending on operating conditions. TOTAL CYCLE TIME Freeze Time + Harvest Time = Total Cycle Time Freeze Time Ambient Harvest Temperature Water Temperature °F/°C Time °F/°C 50/10 70/21 90/32 50/10 13.0-13.1 70/21 13.8-16.4 1.4-3.5 90/32 21.8-23.3...
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Page 109: Wiring Diagrams
Wiring Diagrams Wiring Diagrams The following pages contain electrical wiring diagrams. Be sure you are referring to the correct diagram for the ice machine you are servicing. Warning Always disconnect power before working on electrical circuitry. WIRING DIAGRAM LEGEND The following symbols are used on all of the wiring diagrams: Internal Compressor Overload (Some models have external compressor overloads)
Page 110: Uge0020A Air-Cooled
UGE0020A AIR-COOLED Self-Contained Air-Cooled Diagram shown in freeze cycle L2 (N) (18) (16) ORG (13) BLU (6) BLU (4) BRN (5) GRY (24) BLU (17) RED (19) BRN (21) (12) BRN (15) YLW (22) (20) BLU (14) PRPL (23) BLU Part Number: 040006847 12/19...
Page 111 UGE0020A Air-Cooled Number Component Bin Thermistor Compressor Compressor Overload Compressor Relay Compressor Start Capacitor Compressor Start Relay Condenser Fan Motor Control Board Fuse Toggle Switch Solenoid Valve - Harvest Thermistor Liquid Line Transformer Control Board Water Inlet Valve Water Pump Water Trough Thermistor Wiring Harness Connector Wire Colors...
Page 112: Ugp0020A Air-Cooled
UGP0020A AIR-COOLED Self-Contained Air-Cooled Diagram shown in freeze cycle L2 (N) (16) ORG (13) BLU (18) (6) BLU (4) BRN (17) RED (24) BLU (5) GRY (21) (19) BRN (12) BRN (15) YLW (22) (20) BLU (14) PRPL (23) BLU 040006979_01 Part Number: 040006847 12/19...
Page 113 UGE0020A Air-Cooled Number Component Bin Thermistor Compressor Compressor Overload Compressor PTCR Compressor relay Compressor Run Capacitor Condenser Fan Motor Control Board Fuse Toggle Switch Solenoid Valve - Harvest Thermistor Liquid Line Transformer Control Board Water Inlet Valve Water Pump Water Trough Thermistor Wiring Harness Connector Wire Colors Black...
Page 114: Uge0030A/Ugf0040A/Ugf0050A/Ugf0065A Air-Cooled
UGE0030A/UGF0040A/UGF0050A/UGF0065A AIR-COOLED Self-Contained Air-Cooled Diagram shown in freeze cycle L2 (N) (18) (16) ORG (13) BLU (6) BLU (4) BRN (5) GRY (24) BLU (17) RED (19) BRN (21) (12) BRN (15) YLW (22) (20) BLU (14) PRPL (23) BLU Part Number: 040006847 12/19...
Page 115 UGE0030A/UGF0040A/UGF0050A/UGF0065A Air-Cooled Number Component Bin Thermistor Compressor Compressor Overload Compressor Relay Compressor Start Capacitor Compressor Start Relay Condenser Fan Motor Control Board Fuse Toggle Switch Solenoid Valve - Harvest Thermistor Liquid Line Transformer Control Board Water Inlet Valve Water Pump Water Trough Thermistor Wiring Harness Connector Wire Colors...
Page 116: Ugp0030A/Ugp0040A/Ugp0050A Air-Cooled
UGP0030A/UGP0040A/UGP0050A AIR-COOLED Self-Contained Air-Cooled Diagram shown in freeze cycle L2 (N) (6) BLU (4) BRN (24) (16) ORG (18) BRN (5) GRY (19) BRN (21) (12) (15) YLW (20) UGP30/40 UGP30/40 (17) RED (13) BLU (22) (23) (14) PRPL 040006978_01 Part Number: 040006847 12/19...
Page 117 UGP0030A/UGP0040A/UGP0050A Air-Cooled Number Component Bin Thermistor Compressor Compressor Overload Compressor Relay Compressor Start Capacitor Compressor Start Relay Condenser Fan Motor Control Board Fuse Toggle Switch Solenoid Valve - Harvest Thermistor Liquid Line Transformer Control Board Water Inlet Valve Water Pump Water Trough Thermistor Wiring Harness Connector Wire Colors...
Page 118: Ugf0080A Air-Cooled
UGF0080A AIR-COOLED Self-Contained Air-Cooled Diagram shown in freeze cycle L2 (N) (24) (16)ORG (6) BLU (5) GRY (4) BRN (50) RED (18)BRN (5) BLU (12)BRN (19)BRN (21) (17)RED (20) (15)YLW (22) (13)BLU (23) (14)PRPL Part Number: 040006847 12/19...
Page 119 UGF0080A Air-Cooled Number Component Bin Thermistor Compressor Compressor Overload (Internal on 230V 50hz or 60hz) Compressor Potential Relay Compressor Relay Compressor Start Capacitor Condenser Fan Motor Control Board Fuse Toggle Switch Solenoid Valve - Harvest Thermistor Liquid Line Transformer Control Board Water Inlet Valve Water Pump Water Trough Thermistor...
Page 120: Ugp0080A Air-Cooled
UGP0080A AIR-COOLED Self-Contained Air-Cooled Diagram shown in freeze cycle L2 (N) (18) BRN (24) (16) ORG (6) BLU (5) GRY (4) BRN (19) (21) (12) (15) YLW (20) (17) RED (22) (13) BLU (23) (14) PRPL 040007029_00 Part Number: 040006847 12/19...
Page 121 UGP0080A Air-Cooled Number Component Bin Thermistor Compressor Compressor Overload Compressor Relay Compressor Start Capacitor Compressor Start Relay Condenser Fan Motor Control Board Fuse Toggle Switch Solenoid Valve - Harvest Thermistor Liquid Line Transformer Control Board Water Inlet Valve Water Pump Water Trough Thermistor Wiring Harness Connector Wire Colors...
Page 122: Tubing Schematics
Tubing Schematics UG0020A Number Component Compressor Harvest Solenoid Condenser Receiver - Water-Cooled Only Liquid Line Drier Heat Exchanger Heat Exchanger Capillary Tube Evaporator Part Number: 040006847 12/19...
Page 123: Ug0030A/Ug0040A/Ug0065A
UG0030A/UG0040A/UG0065A Number Component Compressor Harvest Solenoid Condenser - Air-Cooled or Water-Cooled Receiver - Water-Cooled Only Liquid Line Drier Heat Exchanger Heat Exchanger Capillary Tube Evaporator Part Number: 040006847 12/19...
Page 124: Ug0050A/Ug0080A
UG0050A/UG0080A Number Component Compressor Harvest Solenoid Condenser - Air-Cooled or Water-Cooled Receiver - Water-Cooled Only Liquid Line Drier Heat Exchanger TXV - Expansion Valve Evaporator Part Number: 040006847 12/19...
Page 128 MANITOWOC ICE 2110 SOUTH 26TH STREET MANITOWOC, WI 54220 844-724-2273 WWW.MANITOWOCICE.COM ©2018 Welbilt Inc. except where explicitly stated otherwise. All rights reserved. Part Number: 040006847 12/19...

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Uge0020a Uge0030a Ugf0040a Ugf0050a Ugf0065a Ugf0080a ... Show all

Manitowoc UG Series Technician's Handbook

General Information

Model Numbers

How to Read a Model Number

Model/Serial Number Location

Warranty

Installation

General

Ice Machine Dimensions

Location of Ice Machine

Leveling the Ice Machine

Cooling of the Ice Machine

Water Service/Drains

Electrical Service

Installation Checklist

Before Starting the Ice Machine

Operation

Component Identification

Ice Making Sequence of Operation

Operational Checks

Maintenance

General

Cleaning/Descaling & Sanitizing Procedure

Detailed Descaling & Sanitizing Procedure

Component Removal

Cleaning the Condenser

Removal from Service/Winterization

Troubleshooting

Questions to Ask the Customer

Ice Machine will Not Run

Ice Machine Prematurely Harvests

Ice Machine will Not Harvest

Water System Checklist

Ice Production Check

Analyzing Discharge Pressure

Discharge Pressure High Checklist

Freeze Cycle Discharge Pressure Low Checklist

Suction Pressure High Checklist

Suction Pressure Low Checklist

Discharge Line Temperature Analysis

Component Check Procedures

Electrical Components

Flammable Refrigerant Procedures

Servicing Requirements

Refrigerant Charging

System Contamination Cleanup

Cycle Times/24-Hour Ice Production/Refrigerant

Pressure Charts

Wiring Diagrams

Tubing Schematics

Quick Links

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Summary of Contents for Manitowoc UG Series

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Table of Contents