Page 1: Table Of Contents
Specifications · · · · · · · · · · · · PAGE 2 Ice Machine Layouts · · · · · · · · · PAGE 3 Pre-Installation · · · · · · · · · · · · PAGE 4 Location &...
Page 2: Specifications
Condenser Water Inlet Temperature Water Pressure 20 psi Voltage (60 Hz) Scotsman reserves the right to make design changes and/or improvements at any time. Specifications and designs are subject to change without notice. Scotsman assumes no liability or responsibility of...
Page 3: Ice Machine Layouts
CME1856W Ice Machine Layouts November 2001 Page 3...
Page 4: Pre-Installation
If the prior ice machine worked acceptably well with the local water conditions, leave the machine at the factory setting. If severe water conditions are present, and water filters do not solve the problem acceptably, adjust the machine to use more water.
Page 5: Location & Assembly
Level the top edge of the bin front to back and left to right. If the ice machine has not been unpacked, do so now. Remove the carton from the skid. Remove shipping straps.
Page 6: Bin Control: Installation
CME1856W Bin Control: Installation The bin control is a thermostat. It must be field installed after the ice machine has been placed on the bin. Before starting, remove the left front panel and any baffle in the bin. 1. Locate bin thermostat bulb.
Page 7: Bin Control
CME1856W Bin Control Bin Thermostat Bracket Bin Thermostat Capillary Tube Mount Bulb Here Attach Thermostat Bulb to Bracket Minimize Excess Tube in Bin Three-Pronged Knob Thermostat and Bracket Attach Bracket to Bottom of Ice Machine November 2001 Page 7...
Page 8: For The Installer
CME1856W For The Installer: Cooling Tower Applications: This unit requires no special modifications for use on a cooling tower. However, the sizing of the cooling tower requires the heat of rejection and the pressure drop across the ice machine’s water cooling circuit (water regulating valve and condenser).
Page 9: Electrical
4. Connect to wires and secure ground wire to ground screw inside junction box. All external wiring should conform to the national, state and local electrical code requirements. Usually an electrical permit and the services of a licensed electrician will be required. November 2001 Page 9 CME1856W...
Page 10: Plumbing
Do not vent this drain. The ice storage bin will have a drain out the back or base, depending upon the model. The drains for the ice machine and the ice storage " bin must be SEPARATE or the ice machine’s drain water may run into the bin and MELT THE ICE.
Page 11: Stacking Kit - Kscme6-Lg-B
2 existing screws and 1 large and 4 small screws from the kit. Both Machines: 12. Place the top ice machine onto the bottom one. Secure together with hardware from the top machine. Remove left front and left side panels.
Page 12: Stacking
CME1856W Stacking Support Bracket Mounting Straps and Hardware Front-to-Back November 2001 Page 12 Gasket on Plastic Walls of Lower Unit Gasket for Metal Edges of Bottom Unit Shield Hanger Bracket Shield...
Page 13: After Utility Connections
___ 13. Have any water filter cartridges been replaced? ___ 14. Check all refrigerant lines and conduit lines, for vibration or rubbing and possible failure. Adjust as needed. ___ 15. Proceed to Initial Start Up. November 2001 Page 13 CME1856W...
Page 14: Component Location And Function
CME1856W Component Location and Function Reservoir: Contains the water used to make ice. Water Inlet Valve: Opens to allow water into the reservoir. Evaporators/Freezing Compartment: Location of the evaporators. Ice forms on the evaporators and is released when warmed up during the harvest cycle.
Page 15: System Controller
Clean: Water valve opens to fill the reservoir. The Water pump starts. The Clean indicator light is switched ON. A manually initiated rinse cycle flushes the system. November 2001 Page 15 CME1856W HI VOLTAGE IN/OUT WATER PUMP PUSH BUTTON CONTROL SWITCHES INDICATOR LIGHTS:...
Page 16: Initial Start Up
10. The reservoir refills at the beginning of Freeze. 11. Fill out the Customer Evaluation and Warranty Registration. Send it to Scotsman. 12. Return all panels to their normal positions. 13. Inform the user of the location and telephone number of the local service company.
Page 17: Adjustments
Off button for more than 3 seconds, then releasing it. The unit will then be Off. From there the machine may be placed in a freeze cycle by pushing and releasing the Freeze button. November 2001 Page 17 CME1856W...
Page 18: How To Operate The Controller
CME1856W How To Operate The Controller The Controller is a microprocessor based device that receives input from several sources and switches various components on and off. Its manual control is thru the use of the Push Button Control Switches 1. Freeze Button. Pushing and releasing this button starts or restarts the machine.
Page 19: How The Electronic Cuber Works
This warms up the evaporators and the surface of the ice frozen to the evaporator surface melts. Ice then falls into the bin. Distributor Heat Exchange Accumulator Hot Gas Valve Refrigeration Schematic November 2001 Page 19 CME1856W Hot Gas Header Evaporator Evaporator Evaporator...
Page 20: How The Electronic Cuber Works
After the purge valve has closed, the inlet water valve opens and water flows into the ice machine. The water valve will NOT be open the complete length of the harvest cycle.
Page 21: Startup: Three Phase Compressor
However, a THREE PHASE scroll compressor will not work properly if run BACKWARDS. If a three phase ice machine’s compressor is making an unusually loud noise and the ice machine does not appear to be refrigerating the water, it’s likely that it’s running backwards.
Page 22: Technicians Only: Freeze Cycle Sequence
CME1856W Technicians Only: Freeze Cycle Sequence Assuming the machine has been operational, the Freeze cycle begins with the end of the Harvest Cycle: • Water Inlet Valve is Closed • Water Pump is ON • Compressor is ON • Hot Gas Valve is Open System Controller Operation, Beginning freeze: 1.
Page 23: Technicians Only: Harvest Cycle Sequence & Other Notes
Water valve time leaking thru rapidly Both ON all the Check for thermistor set unplugged time or failed November 2001 Page 23 CME1856W Refrigeration Light Very long ice harvest High Discharge Temperature Check for low discharge temperature or long freeze...
Page 24: Sanitation And Cleaning
CME1856W Sanitation and Cleaning It is the User’s responsibility to keep the ice machine and ice storage bin in a sanitary condition. Without human intervention, sanitation will not be maintained. Ice machines also require occasional cleaning of their water systems with a specifically designed chemical. This chemical dissolves mineral build up that forms during the ice making process.
Page 25: Additional Maintenance
Or: Drain the Reservoir by Holding Purge Valve Open While in a Clean Cycle 3. Switch ice machine OFF or wait for it to be in a cleaning cycle. 4. Mix a 1 gallon solution of warm (95-115 o F.) water and sanitizer.
Page 26: Additional Maintenance: Water Distributors
Soak or scrub the distributors in or with a solution of Scotsman Ice Machine Cleaner and warm potable water. 10. Return the water distributors to their normal installed position.
Page 27: Additional Maintenance: Inlet Water Valve Screen
7. Remove two screws holding the dust cover to the water level sensor. Dust Cover 8. Clean the 4 lenses with a soft tissue or cotton swab. Clean Lenses Water Level Sensor, Dust Cover Removed 9. Reverse to reassemble. November 2001 Page 27 CME1856W Clean Lenses...
Page 28: Additional Maintenance: Ice Sensors, Condenser
7. Connect another hose to the condenser outlet and route it to the bucket. 8. Mix an acid solution such as Scotsman ice machine cleaner and hot water. Follow the mixing instructions provided with the acid. Pour or mix the solution in the bucket.
Page 29: Service Diagnosis: Diagnostic Light Analysis
Push and release Off button. Push and release Freeze button. Check operation. Push cube size float down, check operation. Check for cause of long harvest cycle** Replace the temperature sensor set (water and discharge). Check water temp. and sensor. November 2001 Page 29 CME1856W...
Page 30 CME1856W Service Diagnosis Problem or Symptom Possible Cause Unit is off because of a Ice sensors did not sense “Harvest Problem” ice falling, unit stayed in harvest until the maximum harvest time ran out. Ice sensors or Controller may have failed.
Page 31: Service Diagnosis: Components
Check wire connections, if ok, replace Controller Check water filters and/or inlet screen. Replace valve Switch any two wires to the compressor Push and release Freeze button. Replace contactor Check and replace Check and replace compressor Replace compressor November 2001 Page 31 CME1856W...
Page 32: Service Diagnosis
CME1856W Service Diagnosis Problem or Symptom Poor Harvest Low Capacity Compressor cycles on and off Possible Cause Scale in water system. Water or Air Temperatures too cold Low system charge Hot gas valve does not open Water regulating valve does not...
Page 33: Operational Characteristics: Cme1856W
Operational Characteristics: CME1856W Cycle Times (minutes): Freeze Harvest System Pressures (PSIG): Suction: End of Freeze Suction: Peak in Harvest Discharge: 5 minutes into Freeze Discharge: Minimum in Harvest Number of Evaporators: • Refrigerant Charge • 60 ounces of R-404A Compressor Type •...
Page 34: Suction Pressure
CME1856W Suction Pressure Pressures During Freeze and Harvest at 70 Suction Prssure Time F Air and 50 November 2001 Page 34 F Water...
Page 35: Removal And Replacement
Pull stem out. 7. Locate water level sensor mounting tabs, compress together to release sensor from bracket. 8. Remove water pump brackets from pump. 9. Reverse to replace. 10. Replace front panel. 11. Re-connect electrical power. November 2001 Page 35 CME1856W...
Page 36: Removal And Replacement
CME1856W Removal and Replacement Purge Valve 1. Disconnect electrical power. Electrical Shock Hazard. Disconnect electrical power before beginning service. 2. Remove left front panel. 3. Unplug wire harness from purge valve coil. 4. Locate and remove the two screws securing the purge valve to the machine.
Page 37: Controller Features & Last Error Recall
Freeze button. Program ID The blue housing controller will display a code at power up that indicates which ice machine model it has been programmed for. The code is based on the green lights that are displayed.
Page 38: Removal And Replacement: System Controller
CME1856W Removal and Replacement: System Controller 1. Disconnect the electrical power. 2. Remove the front panel. 3. Remove mounting screw holding controller to cabinet. 4. Touch a metal surface to discharge any static electricity. 5. Pull controller out slightly and unplug all electrical connections.
Page 39: Removal And Replacement
8. Use the metal mounts that were on the ice machine, do NOT use the rubber mounts from the replacement compressor. November 2001 Page 39 CME1856W Burn Hazard Compressor top is HOT! Do NOT touch...
Page 40: Removal And Replacement
CME1856W Removal and Replacement Transformer and Compressor Starting Components Single phase compressors use a start relay, start capacitor and run capacitor. All are located in a sheet metal box to the right of the system controller. The compressor contactor is also located in that box.
Page 41: Refrigerant
CME1856W Refrigerant 1. This ice machine uses R-404A or HP62 as a refrigerant. It has several unique characteristics. A. It is a near-azeotrope, and must be liquid charged. B. It must use polyol ester refrigerant oil, and that oil is very water absorbent. The system must not be open for more than 15 minutes.
Page 42: Liquid Charging
7. With a sight glass or charge faster in the hose to the low side port, start the ice machine. 8. Open the low side service access valve. 9. Crack open the low side manifold valve and watch the scale and sight glass.
Page 43: Before Calling For Service
Before Calling for Service Check the following: 1. Has the water supply to the ice machine or building been shut off? If yes, the ice machine will automatically restart within 25 minutes after water begins to flow to it. 2. Has power been shut off to the ice machine? If yes, the ice machine will automatically restart when power is restored.
Page 44: Index
Adjust the Amount of Water Purge · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 17 Cleaning of the Ice Machine Water System:· · · · · · · · · · · · · · · · · · · · · · · · · · · · 24 Compressor Information ·...

Scotsman CME1856W User Manual

Quick Links

TABLE OF CONTENTS

Related Manuals for Scotsman CME1856W

Summary of Contents for Scotsman CME1856W

Table of Contents