Scotsman CME650 Service Manual

Scotsman cme650 ice machine: user guide

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Introduction
To the owner or user: This service manual is
intended to provide you, and the maintenance or
service technician, with the information needed to
install, start up, clean, maintain and repair this
product.
The CME650 is an ice machine that produces
cubed ice on 4 vertical cube freezing surfaces. The
ice falls as vertical strips of cubes into the ice
storage bin where they break up into individual
cubes. The CME650 automatically maintains the
level of ice by turning on when the ice level falls,
and switches off when the bin is full.
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 2
Plumbing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 6
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 7
Component Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 9
Initial Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 10
Technical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 17
Parts lists and wiring diagrams are located in the
center of this manual, printed on yellow paper.
Note the warning symbol where it appears in this
It is an alert for important safety information on a
hazard that might cause serious injury.
Keep this manual for future reference.
This manual was printed on recycled paper.

Table of Contents

October 1994
Page 1
The refrigeration system uses HP62 as the
refrigerant. HP62 models use polyolester
refrigerant oil.
Information on HP62 is located on page 22.
CME650

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Summary of Contents for Scotsman CME650

  • Page 1: Table Of Contents

    The CME650 is an ice machine that produces cubed ice on 4 vertical cube freezing surfaces. The ice falls as vertical strips of cubes into the ice storage bin where they break up into individual cubes.
  • Page 2: Specifications

    30 x 24 x 27 Air CME650WE-6A 30 x 24 x 27 Water Nameplate CME650 Cabinet The CME650 will stack onto a variety of ice storage bins, see sales literature for proper ice storage bin. Examples of bins this machine will fit are: *BH550...
  • Page 3: Limitations

    They meet or exceed the standards of UL, NSF, and CSA. Scotsman assumes no liability or responsibility of any kind for products manufactured by Scotsman that have been altered in any way, including the use of any part and/or other components not specifically approved by Scotsman.
  • Page 4: Installation

    It must be installed indoors, in a controlled environment. The air and water temperatures must not exceed rated limits. Pre-installation: 1. Inspect the place where the ice machine is to be installed. Check for: space for the cabinet, water supply, drain availability and electrical power supply.
  • Page 5 3. Line up the ice machine, check that there is a Capillary Tube good seal between the ice machine and the storage bin. 4. If on a Scotsman bin, attach the ice machine to Bin Thermostat the bin using the straps and bolts shipped with the Bracket ice machine.
  • Page 6: Plumbing

    A loop of copper tubing may be used between the ice machine and the water supply. This will allow the ice machine to be pulled out from its installed location without disconnecting the water line. No back-flow preventer should be needed in the inlet potable water line because provision for that is incorporated in this N.S.F.
  • Page 7: Electrical

    CME650 Installation For The Electrician This unit must be on a separate power supply. The maximum fuse size for this circuit is listed on the nameplate, and per the nameplate use fuses, or HACR circuit breakers. Electrical connections are made at the rear of the ice maker, inside the junction box.
  • Page 8: Final Check List

    Scotsman. 13. Has the owner/user been given the name and telephone number of the authorized Scotsman Service Agency serving that location? August 1994 Page 8...
  • Page 9: Component Location

    Component Location The ice machine is designed for front service. Many components are serviceable from the front without removing the side panels. Behind the front panel: Water pump Inlet water valve Reservoir Evaporators Water distributor Control box with cube size control adjustment...
  • Page 10: Initial Start Up

    Note: In some cases some slush will form in the reservoir. This is temporary and normal. 9. Allow the ice machine to operate for about 18 minutes. The ice should be fully formed and should be harvested within a few minutes.
  • Page 11: Electrical Sequence

    Note: Harvest time is dependent upon the water and air temperatures at the ice machine. Colder air and water will result in faster ice making, but longer harvest cycles. Do NOT adjust harvest time too short, as this will case a freeze up of the evaporators.
  • Page 12: Cleaning

    4 times a year. This ice machine will perform at its best when kept clean. There are two areas to keep clean: The water system including the water reservoir, distributor tube and evaporator surface;...
  • Page 13 Note: If the ice baffle was removed from the bin during cleaning it must be reinstalled in the bin. To Remove Scale: 1. Mix a cleaning solution of 4 ounces of Scotsman Ice Machine Cleaner to 4 pints of hot F.-110 F.) water.
  • Page 14 KEEP OUT OF THE REACH OF CHILDREN. 7. Mix 8 ounces of Scotsman Ice Machine Cleaner with 1 gallon of warm (95 F. - 115 pour into the reservoir until full. 8. Switch the master switch ON, and operate the unit for 20 minutes, then switch the unit OFF.
  • Page 15: Water/ Refrigeration Schematic

    Valve Water Reservoir Water Schematic: Water flows into the ice machine from its inlet connection at the back of the cabinet, through the inlet water valve and into the reservoir. The water in the reservoir is pumped up and through the water distributor tube at the top of the evaporators.
  • Page 16: Harvest Cycle

    CME650 Harvest Cycle: During the harvest cycle, the refrigerant flows from the compressor, through the discharge line to a branch in the line containing the Hot Gas Valve. This valve is Open during the harvest cycle, allowing the hot discharge gas to bypass the condenser and enter the evaporator at its inlet.
  • Page 17: Technical Characteristics

    Thermostatic Expansion Valve Not Adjustable F. water F. water F. water; 260 -290 @ 70 F. air and 50 F. and 43.5 F, C.O. range between 33.5 October 1994 Page 17 CME650 F. water. F. and -6 F. and 38.5...
  • Page 18: Service Diagnosis

    CME650 Service Diagnosis: SYMPTOM No ice is made, nothing operates No ice is made POSSIBLE CAUSE Unit off, due to no power Unit off, due to master switch in OFF position Unit off, due to bin thermostat open Unit off, due to hi pressure cut out...
  • Page 19 Replace if found to be faulty. Adjust harvest time longer. Check water supply & distribution system. Clean water system with Scotsman Ice Machine Cleaner. Check for causes of high discharge pressure and correct. Advise user, suggest additional room cooling.
  • Page 20: Removal And Replacement

    CME650 Removal and Replacement Cube Size Control: Before replacing the cube size control, it should be positively determined that it is at fault. If it does not open when warm, replace it. 1. Disconnect electrical power. Electrical shock hazard. Electrical shock can cause personal injury.
  • Page 21: October

    3. Remove the screws holding the valve to the bracket. 4. Unplug the electrical connection from the valve. 5. Remove the valve from the ice machine. 6. Reverse the above steps to reassemble. Inlet Water Valve October 1994...
  • Page 22 CME650 REFRIGERATION SYSTEM: HP62 (R-404A) Refrigerant THIS ICE MACHINE USES HP62 REFRIGERANT AND POLYOLESTER COMPRESSOR OIL DO NOT USE MINERAL OIL IN THIS REFRIGERATION SYSTEM. HP62 is a "Near Azeotrope", and therefore liquid charging is required. ¤ Weigh as much of the charge (as liquid) into the discharge side as possible.
  • Page 23: Refrigeration Service

    There are various mechanical devices that may be used to recycle refrigerant at the field level, however, Scotsman requires that any refrigerant placed into a Scotsman ice machine meet ARI spec 700-88. Reclaim programs are available through most refrigerant wholesalers.
  • Page 24 If using recycled refrigerant, it must meet ARI spec 700 or have been cleaned by a machine capable of attaining ARI spec 700-88. If an ice machine is to be discarded and still contains refrigerant, Scotsman recommends that the refrigerant be recovered, reclaimed, or recycled so that it is not discharged into the air.

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