Table of Contents
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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 service this
ice system.
INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
FOR THE INSTALLER: Remote Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
FOR THE INSTALLER: Coupling Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
FINAL CHECK LIST . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
COMPONENT LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
COMPONENT DESCRIPTION: Control System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
COMPONENT DESCRIPTION: Water System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
INITIAL START UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
CLEANING & SANITIZING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
SYSTEM SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
ADJUSTMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SERVICE DIAGNOSIS: Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Mechanical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
REFRIGERATION SERVICE: HP62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
REFRIGERATION SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Parts Lists and Wiring Diagrams are located in
the center of this manual, printed on yellow
paper.
Table of Contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
October 1994
Page 1
The CME500R uses HP62 as the refrigerant, and
polyolester oil for compressor lubrication.
CME500R
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Table of Contents
Related Manuals for Scotsman CME500R
Summary of Contents for Scotsman CME500R
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Page 1: Table Of Contents
Parts Lists and Wiring Diagrams are located in the center of this manual, printed on yellow paper. The CME500R uses HP62 as the refrigerant, and polyolester oil for compressor lubrication. Table of Contents ........15 . -
Page 2: For The Installer
CME500R FOR THE INSTALLER The CME500R will fit the following Scotsman ice storage bins: *BH550 *HTB500, HTB350, HTB250 BH800 (with bin top KBT23) BH900 (with bin top KTB22) BH1360 It will also fit these Scotsman Dispensers: CD200 IS150 (with adapter kit KADCM1) RS150 (with adapter kit KADCM1) *These smaller bins are recommended. - Page 3 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 4 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.
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Page 5: For The Installer: Remote Condenser
Use a horizontal spiral (as Inside illustrated) to avoid any traps in the lines. Building Note: Spiral need not be as tight as illustrated. 5. Have the roofing contractor seal the holes in the roof per local codes. October 1994 Page 5 CME500R... -
Page 6: For The Installer: Coupling Instructions
5. After all connections are made, and after the king valve has been opened, check the couplings for leaks. Note: The system charge is contained in the receiver tank of the ice machine. Only "holding" charges are present in the "precharged" tubing or the condenser. Liquid Line... -
Page 7: For The Electrician
ELECTRICAL CONNECTIONS REMOTE CONNECTION The remote condenser is designed to be powered from the ice machine. There is a separate electrical junction box at the back of the ice maker for the remote condenser. Wire the remote condenser to the ice maker in accordance with local and national electric codes. -
Page 8: For The Plumber
In some cases a plumber will be required. Water Limitations: An ice machine is a food manufacturing plant, it takes in a raw material, water, and turns it into a food product, ice. The purity of the water is very important in obtaining pure ice and in maximizing product life. -
Page 9: Final Check List
11. Has the Manufacturers Registration form been properly filled out? Check for correct model and serial numbers from Serial nameplate, then mail to OPTIONAL the SCOTSMAN factory. FILTER 12. Has the owner/user been HAND SHUT given the Service Manual and OFF VALVE... -
Page 10: Component Location
CME500R 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 11: Component Description: Control System
Its Cut In is 30 PSIG and its Cut Out is 15 PSIG. Located behind the control box. Cube Size Control Timer & Switch Bin Thermostat October 1994 Page 11 CME500R High Pressure Safety Cut Out Switch... -
Page 12: Component Description: Water System
CME500R COMPONENT DESCRIPTION: Water System Water Inlet Solenoid Valve The water inlet solenoid valve controls the flow of water to the reservoir. It fills the reservoir with water and excess water overflows out the standpipe and down the drain. This action fills and rinses the reservoir during each harvest cycle. -
Page 13: Initial Start Up
Compressor ON-OFF switch are in the OFF position. 2. Switch on the electrical power. Electrical power must be supplied to the ice machine for 4 hours before starting the compressor for the first time. The crankcase heater will now warm up the compressor’s oil. - Page 14 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 cause a freeze up of the evaporators.
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Page 15: Freezing Cycle Operation
Motor Heat Discharge Exchange Coil Liquid Line Valve Water Valve (Closed) Filter/Dryer Drain October 1994 Page 15 CME500R REFRIGERATION SCHEMATIC Hot Gas Filter Valve (Closed) Pump Suction Line Evaporators... -
Page 16: Harvest Cycle - Hot Gas Bypass
CME500R HARVEST CYCLE - HOT GAS BYPASS When the timer switches the icemaker into the harvest cycle, high pressure, high temperature refrigerant gas discharged from the compressor flows through the hot gas solenoid valve into each evaporator plate. During this cycle, the refrigerant bypasses the condenser. -
Page 17: Cleaning & Sanitizing
ON until reservoir is empty of water. Replace hose on inlet. 6. Replace evaporator cover. 7. Mix 8 ounces of Scotsman Ice Machine Cleaner with 1 gallon of warm (95 F. - 115 pour into the reservoir until full. - Page 18 Scale that may form on the plastic liner of a bin may be removed by scrubbing the surface of the line with a mixture of Scotsman Ice Machine Cleaner and hot water. Remove any scale prior to sanitizing.
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Page 19: System Specifications
F. water F. air and 70 F. water F. air and 70 F. water F. water F. water. F. water F. water. F., and 43.5 F.; C.O. range between 33.5 F. and +25 October 1994 Page 19 CME500R F.,and 38.5... -
Page 20: Adjustments
CME500R ADJUSTMENTS Electrical power present in the control box can cause personal injury. Disconnect power before beginning to adjust timer. Adjustment Of The Timer & Switch Assembly One complete revolution of the cam on the timer takes eight minutes. The machine ships with the harvest time set at 2 minutes. -
Page 21: Service Diagnosis: Water
Reservoir leaks Inlet water valve restricted Short harvest cycle Water pressure too low October 1994 Page 21 CME500R PROBABLE FIX Clean inlet screen, check coil, replace valve if required Check pump motor, replace pump if motor will not run. No water in reservoir, check inlet water valve, check reservoir for leak. -
Page 22: Service Diagnosis: Electrical And/Or Adjustments
CME500R SERVICE DIAGNOSIS: Electrical and/or Adjustments SYMPTOM Machine does not operate Makes thick ice/freezes up Runs, makes no ice Long freeze cycle Cubes too small Cubes too large Compressor cycles on and off on pump down control Compressor will not run... -
Page 23: Service Diagnosis: Refrigeration And/Or Mechanical
Compressor overheats Some frost will not hurt TXV meters too much refrigerant October 1994 Page 23 CME500R PROBABLE FIX Check for power to the coil, check for not opening, replace Replace head pressure control valve. Hot gas valve leaks thru, replace it... -
Page 24: Removal And Replacement
CME500R REMOVAL AND REPLACEMENT Electrical Shock Hazard. Electrical shock can cause personal injury. Disconnect power before beginning to service components. Water Distributor Tubes And Manifold Tubes To remove the water distributor tube and manifold tube: 1. Remove the front panel. - Page 25 4. Use corbin clamp pliers to loosen and slide corbin clamps on hoses away from pump. 5. Remove screws retaining pump to bracket. 6. Pull pump out of ice machine. 7. Reverse to reassemble. 8. Replace front panel. 8. Reconnect electrical power.
- Page 26 CME500R REMOVAL AND REPLACEMENT Thermostatic Expansion Valve 1. Before replacing this valve, be certain that the valve is the cause of the problem, and cannot be adjusted. 2. Remove the top, service and front panels. 3. Discharge and recover the refrigerant.
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Page 27: Refrigeration Service: Hp62
60 ..123 62 ..127 64 ..132 66 ..136 October 1994 Page 27 CME500R VAPOR TEMP. PRESSURE (DEG F) (PSIG) 70 . -
Page 28: 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.