Table of Contents
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Table of Contents
Related Manuals for Scotsman UC2024 Series
Summary of Contents for Scotsman UC2024 Series
- Page 1 Service Manual for models UC2024 and UC2724...
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Page 2: Table Of Contents
Observe any caution or warning notices. They are limited. Use a commercial service company. Locate important and provide notice of potential hazards. one from the Scotsman website: www.Scotsman-ice. Keep this manual for future reference. Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance. -
Page 3: Specifications
UC2024 and UC2724 Service Manual Specifications This ice maker is designed to be installed indoors, Operating the machine outside of any of the above in a controlled environment. Although it can operate limitations is considered abuse and any resulting in a wide range of air and water temperatures, it damage is not covered by warranty and could cause a will provide the best performance if not subject to complete loss of warranty coverage. -
Page 4: Cabinet Drawing
UC2024 and UC2724 Service Manual Cabinet Drawing WATER INLET ACCESS POWER CORD DRAIN Model and Serial Number Dataplate November 2019 Page 4... -
Page 5: Plan And Front Views
UC2024 and UC2724 Service Manual Plan and Front Views 72.3cm 28.4in 61cm 24.0in 84.7cm 33.4in 99cm 39.0in 50.8cm 20.0in EXHAUST INLET November 2019 Page 5... -
Page 6: Side And Back Views
UC2024 and UC2724 Service Manual Side and Back Views 5.3cm 2.08in UTILITY CLEARANCE 72.8cm 28.7in 15.1cm 6.0in 51.4cm 20.3in UNIT DRAIN 3/4" FPT WATER INLET CONDENSER WATER 3/8” FPT INLET 3/8-18NPT CONDENSOR WATER DRAIN CONNECTION 16.8cm 13.6cm 1/2-14 NPT 11.9cm 6.6in 5.4in 4.7in... -
Page 7: Placement
Scotsman. 1. Separate the carton from the shipping pallet Scotsman reserves the right to make design changes 2. Inspect for any hidden shipping damage. If and/or improvements at any time. -
Page 8: Installation
UC2024 and UC2724 Service Manual Installation For the Electrician Note: The building drain inlet must be lower than the drain outlets at the back of the ice machine. This is a cord-connected unit and must be on a The water supply must have a hand shut off valve separate single phase power supply. -
Page 9: Initial Start Up
Plumbing connections are complete and Fill out the Customer Evaluation and Warranty tested for leaks Registration form, and mail it in to Scotsman or Ice maker is installed with proper register the unit at Scotsman’s website (www. clearance, allowing for service and utility scotsman-ice.com). -
Page 10: Use And Operation
UC2024 and UC2724 Service Manual Use and Operation To use, simply lift the door by its bottom edge and slide it up and into the top of the machine. Use the scoop to remove ice and close the door. Air cooled models must be able to take in room air and discharge air heated by the ice making process. -
Page 11: Ice Bridge Thickness Adjustment
UC2024 and UC2724 Service Manual Ice Bridge Thickness Adjustment Note: The bridge thickness adjustment is used to obtain the CORRECT size, not to adjust to individual preferences. Do NOT make the ice bridge too thick or too thin, as either will reduce ice making capacity. -
Page 12: Indicator Light Reference
UC2024 and UC2724 Service Manual Indicator Light Reference There are four indicator lights visible when the electrical component drawer is pulled out. Timer On • This light is switched ON when the freeze cycle has progressed significantly enough for the evaporator thermistor to have reached its freeze preset temperature. -
Page 13: Maintenance And Cleaning
Prep: Obtain food grade scale remover such as Scotsman Clear 1. You will also need a clean container, sanitizer, clean cloths and clean rubber gloves. Use of a spray bottle is recommended for ease of washing hard to reach areas. - Page 14 UC2024 and UC2724 Service Manual 13. Drain the scale remover solution by removing the plug from the drain hose. Return the plug to the drain hose. 14. Check that the scale has cleared from the spray bar. Remove spray bar if needed to clear any scale, be sure it is returned to its original position.
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Page 15: Condensers And Air Filter Cleaning
UC2024 and UC2724 Service Manual Condensers and Air Filter Cleaning Filters and Air Cooled Condenser Water cooled equipment may be connected to a closed loop recirculating system or to a regular water The air filter located on the lower front grill will capture supply. -
Page 16: The Systems
UC2024 and UC2724 Service Manual The Systems Water System: The components of the water system are the inlet Commercial cube ice machines must do several water solenoid, the overflow standpipe, the water things to supply the user with ice: distributor and the water pump. 1. -
Page 17: Selected Water Components
UC2024 and UC2724 Service Manual Selected Water Components Ice sensing plate and flap. The ice sensing plate or ice chute is positioned at the base of the evaporator and over the sump. It is mounted at an angle that, during freeze, directs water into the open sensing flap or, during harvest, directs ice towards the ice storage bin. -
Page 18: Selected Electrical Components
UC2024 and UC2724 Service Manual Selected Electrical Components Controller The controller is the part that operates the machine. It is connected to: • Pressure controls • Hot gas valve • Evaporator thermistor • Sump water thermistor • Sensing plate switch •... -
Page 19: Selected Refrigeration Components
UC2024 and UC2724 Service Manual Selected Refrigeration Components Thermostatic expansion valve The thermostatic expansion valve, or TXV, is the metering device for the refrigeration system. Superheat numbers are not listed because it changes with heat load and with the modulation of the valve. -
Page 20: Controller
UC2024 and UC2724 Service Manual Controller Load Tables The controller is a computer, a computer that has sensors and relays. The evaporator thermistor provides electrical Stand By resistance readings to the controller. Compressor The sump water thermistor also provides resistance Fan motor readings to the controller. -
Page 21: Ice Sensing Plate And Switch
UC2024 and UC2724 Service Manual Ice Sensing Plate and Switch The ice sensing plate is a flap that is in the ice chute. It is normally open, and during the freeze cycle water Flap flows thru the open hole into the sump. A magnet is embedded into an arm of that flap, and moves with the flap. -
Page 22: Test Mode
UC2024 and UC2724 Service Manual Test Mode The controller has a test mode that can be used by the service tech to confirm operation. To use test mode: 1. Place the evaporator thermistor probe in 32 F. water. 2. Place the sump water thermistor probe in 32 water. -
Page 23: Thermistor Values
UC2024 and UC2724 Service Manual Thermistor Values Deg. F · Ohms Deg. F · Ohms Deg. F. · Ohms Deg. F. Ohms Deg. F. · Ohms 0· · · · 85325 51 · · · 19381 102 · · 5569 153 ·... -
Page 24: Timed Cycles
UC2024 and UC2724 Service Manual Timed Cycles Normally the control system operates with the evaporator thermistor controlling cube size and the flap / curtain switch controlling harvest time. If the evaporator thermistor would fail to register a temperature in the expected range (its resistance reading open or shorted), the controller will still go thru a freeze cycle, except it will be timed. -
Page 25: Technical Information On Uc2024
UC2024 and UC2724 Service Manual Technical Information on UC2024 System Pressures 70/50 Time Suction Discharge Cycle Time: 15 - 16 minutes Unit Current Draw: 6 to 6.5 in Freeze Mode Maximum Suction Pressure in Harvest: 48 PSIG Suction pressure just before harvest. 6 - 7 PSIG System Pressures 90/70 Time Discharge... -
Page 26: Technical Information On Uc2724
UC2024 and UC2724 Service Manual Technical Information on UC2724 System Pressures 70/50 Time Suction Discharge Cycle Time: 13 - 14 minutes Unit Current Draw: 6in Freeze Mode 6 - 7 Maximum Suction Pressure in Harvest: 52 - 54PSIG Suction pressure just before harvest. 3 - 4 PSIG System Pressures at 90/70 Time Discharge... -
Page 27: Service Diagnosis
UC2024 and UC2724 Service Manual Service Diagnosis Symptom Possible Cause Probable Correction No ice in bin Unplugged or loose plug in Check, if plug is loose in outlet have outlet replaced outlet Unit switched off Remove front panel, confirm master switch is in the ON position No water to unit, sump not Check for water filter plugged up, replace if... - Page 28 UC2024 and UC2724 Service Manual Symptom Possible Cause Probable Correction No ice in bin Ice is made, but does not Check hot gas valve for proper operation release Evaporator surface Check plating and grid condition, replace evaporator damaged if damaged Ice is poorly formed, Fouled water distributor Clean water distributor...
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Page 29: Removal And Replacement
UC2024 and UC2724 Service Manual Removal and Replacement Inlet Water Solenoid Valve Access to many components will require removal of the back panel. 1. Disconnect electrical power Water Pump 1. Disconnect electrical power. Electrical Shock Hazard Disconnect electrical Electrical Shock Hazard power before beginning Disconnect electrical power before beginning... -
Page 30: Removal And Replacement
UC2024 and UC2724 Service Manual Removal and Replacement Controller and other electrical Transformer Access to the controller is by removing a retaining 1. Pull the electrical box out. screw and sliding the electrical box out. 2. Remove wires from transfomer. All service in this area begins with disconnecting 3. -
Page 31: Removal And Replacement
16. Restart and test for proper operation. compressor. Most Scotsman service compressors November 2019 Page 31... -
Page 32: Condenser Fan Motor
UC2024 and UC2724 Service Manual Condenser Fan Motor The condenser fan motor only operates when the fan pressure control closes to connect power to it. Before changing a fan that does not turn, check for power to it first. To replace: 1. -
Page 33: Thermistors
UC2024 and UC2724 Service Manual Thermistors Thermistors Note: Thermistors sold as a pair. Replacement requires removal of front, upper back, and side panels. • Blue wires to pump hose. • Black wires to evaporator outlet. All service in this area begins with disconnecting Evaporator electrical power. -
Page 34: Flap Or Curtain Switch
UC2024 and UC2724 Service Manual Flap or Curtain Switch Flap Switch (Curtain Switch in Wiring Diagram) 1. Remove front panel. Flap or Curtain Switch Electrical Shock Hazard Disconnect electrical power before beginning 2. Switch unit off. 3. Pull electrical box out. 4. -
Page 35: Hot Gas Valve And Txv
UC2024 and UC2724 Service Manual Hot Gas Valve and TXV Location of Hot Gas Valve As with other components, replacement of either of these two parts requires removal of the back panel. 1. Disconnect electrical power. Electrical Shock Hazard Disconnect electrical power before beginning 2. -
Page 36: Evaporator
UC2024 and UC2724 Service Manual Evaporator 1. Disconnect electrical power. Remove Two Screws Electrical Shock Hazard Disconnect electrical power before beginning 2. Drain water from sump. 3. Remove front, upper back and both side panels. 4. Recover refrigerant. 5. Disconnect water hose to top of evaporator. 6. -
Page 37: Quick Reference
UC2024 and UC2724 Service Manual Quick Reference Superheat, 5 Superheat, 5 Refrigerant Compressor minutes into minutes into Model Charge (oz) Amps freeze @70/50 freeze @90/70 (R-134a) (degrees F.) (degrees F.) UC2024SA-1A 13-15 9-11 UC2024MA-1A UC2024SW-1A UC2024MW- 1A UC2724SA-1A 4.2-5 15-17 14-16 UC2724MA-1A UC2724SW-1A... -
Page 38: Wiring Diagram Uc2024
UC2024 and UC2724 Service Manual Wiring Diagram UC2024 November 2019 Page 38... -
Page 39: Wiring Diagram Uc2724
UC2024 and UC2724 Service Manual Wiring Diagram UC2724 Shown in ice making mode November 2019 Page 39... - Page 40 SCOTSMAN ICE SYSTEMS 101 Corporate Woods Parkway Vernon Hills, IL 60061 800-726-8762 www.scotsman-ice.com...
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Questions and answers
all,lights on bridge sensor are blinking is this normal in freeze mode?
No, it is not normal for all lights on the bridge sensor of the Scotsman UC2024 Series to blink in freeze mode. The document states that each push of the + or - button changes the indicator lights, with a blinking light indicating an adjustment in ice thickness. If all lights are blinking, it may indicate an issue or adjustment in progress rather than normal operation.
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