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.
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Location & Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Initial Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Harvest Cycle Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts Lists and Wiring Diagrams are located in the
center of this manual, printed on yellow paper.
This manual was printed on recycled paper.
Table of Contents
April, 1993
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Summary of Contents for Scotsman MCM1462
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Page 1: Table Of Contents
Removal and Replacement ......Parts Lists and Wiring Diagrams are located in the center of this manual, printed on yellow paper. This manual was printed on recycled paper. Table of Contents April, 1993 Page 1 MCM1462... -
Page 2: Specifications
MCM1462 FOR THE INSTALLER The MCM1462 will fit the MDB900 ice storage bin (48" wide). It will double-stack with kit KSMCM48. The stacking kit includes: Relay box and wires to interconnect bin controls. Stainless steel panel bracket to retain lower unit front panels. -
Page 3: For The Installer: Location & Assembly
1. Arrange for proper electric, water and drain. See instructions for the plumber and for the electrician. 2. Single ice machine on bin: Use caster kit KBC9. After mounting the casters, position the ice storage bin in the selected location: Two ice machines on a bin require stacking kit KSMCM48. -
Page 4: Stacking
MCM1462 FOR THE INSTALLER: Location & Assembly Stacking Instructions A stacking kit, KSMCM48, is required to interconnect the ice level controls, seal the freezing compartments, support the bin with heavy duty legs, and to retain the top edges of the bottom unit’s front panels. -
Page 5: For The Electrician
Usually an electrical permit and services of a licensed electrician will be required. JUNCTION BOX HAND DISCONNECT SWITCH JUNCTION BACK VIEW OF UNIT ELECTRICAL CONNECTIONS, AIR COOLED April, 1993 Page 5 MCM1462 DETAIL OF GROUND SCREW... -
Page 6: For The Plumber
Water Limitations: An ice machine is a food manufacturing plant, it takes in a raw material, water, and turns it inot a food product, ice. The purity of the water is very important in obtaining pure ice and in maximizing product life. -
Page 7: 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 the completed card to the SCOTSMAN factory. 12. Has the owner/user been given the Service Manual and instructed how to operate and maintain the icemaker? 13. -
Page 8: Initial Start Up
MCM1462 INITAL START UP 1. Remove the front panels by removing screws at the base and pulling out. 2. Remove two screws and the control box cover. 3. Check that the two switches on the control box, the ICE-OFF-WASH rocker switch and the COMPRESSOR ON-OFF toggle switch are in the OFF position. - Page 9 Answer all questions about the icemaker by the owner; and inform the owner of the name and telephone number of the local authorized SCOTSMAN Distributor, or CUBE SIZE service agency. CONTROL...
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Page 10: Freezing Cycle Operation
MCM1462 FREEZING CYCLE OPERATION Water from the sump assembly is pumped to the water distributor system at the top of each evaporator plate. From the water distributor the water cascades by gravity over all cells of the plate WATER DISTRIBUTION and to the sump assembly below. -
Page 11: Harvest Cycle Operation
MCM1462 HARVEST CYCLE - HOT GAS BYPASS When the timer switches the icemaker into the harvest cycle, the finish relay is de-energized, and WATER the hot gas valve and inlet water valve OPEN. DISTRIBUTION Then high pressure, high temperature gas... -
Page 12: Component Description
MCM1462 COMPONENT DESCRIPTION Cube Size Control This reverse acting thermostat controls the length of the freezing cycle. It is sensing the temperature of the suction line. When the suction line gets cold enough, the cube size control closes (on temperature fall) and starts the timer. A change in... - Page 13 Bin Level Control This electronic control uses sound waves to measure the distance between the bottom of the ice machine and the top of the ice in the bin. It is designed to control the machine’s ice production to maintain that distance.
- Page 14 MCM1462 COMPONENT DESCRIPTION Water Inlet Solenoid Valve The water inlet solenoid valve fills the sump assembly with water. Extra water overflows out the overflow standpipe of the sump. This action fills and rinses the sump during each harvest cycle. The flow rate is 1 g.p.m.
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Page 15: Cleaning
CLEANING ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// A Scotsman Ice System represents a sizable investment of time and money in any company’s business. In order to receive the best return for that investment, it MUST receive periodic maintenance. Maintenance and Cleaning should be scheduled at a minimum of twice per year. - Page 16 Scotsman Ice Machine Cleaner and hot water. Remove any scale prior to sanitizing. To Remove Scale: 1. Mix a cleaning solution of 4 ounces of Scotsman Ice Machine Cleaner to 4 pints of hot (95 F.) water. 2. Using rubber gloves, dip a nylon scouring pad into the cleaning solution, and scrub the scale off of the liner.
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Page 17: Adjustments
To Adjust To increase, rotate the adjustment stem counter clockwsie (screw it out). To decrease pressure, rotate the adjustment stem clockwise (screw it in). ADJUSTMENT OF THE WATER REGULATOR ADJUSTMENT STEM April, 1993 Page 17 MCM1462... - Page 18 MCM1462 ADJUSTMENTS Adjustment Of The Timer & Switch Assembly Electrcial power present in the control box can cause personal injury. Disconnect power before begining to adjust timer. One complete revolution of the cam on the timer takes eight minutes. The normal setting is three and one-half minutes, as set at the factory.
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Page 19: System Specifications
......15" from the base of the ice machine 1/2 ......22" from the base of the ice machine 1/4 . -
Page 20: Service Diagnosis
MCM1462 SERVICE DIAGNOSIS: Electrical and/or Adjustments SYMPTOM Nothing operates Makes thick ice/freezes up Runs, makes no ice Long freeze cycle Cubes too small Cubes too large POSSIBLE CAUSE Bin level control holding machine off No Power High pressure control open High temperature cut out open P. - Page 21 Control not set on full Ice level control failiure Timer stuck; does not turn April, 1993 Page 21 MCM1462 PROBABLE FIX Check and adjust harvest time Check supply, filter, strainer and valve Check for power to the coil, check for...
- Page 22 MCM1462 SERVICE DIAGNOSIS: Ice Level Control Circuit CONDITION Ice Machine does not run, it has power to it, the high pressure control is closed, the on/off switch is set to Machine runs, makes ice, switches on and off, but ice level cannot be controlled.
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Page 23: Removal And Replacement
Remove the cube size control. To replace the cube size control, reverse the removal procedure. April, 1993 Page 23 MCM1462 Electrical Shock Hazard. Electrical shock can cause personal injury. Disconnect power... - Page 24 MCM1462 REMOVAL AND REPLACEMENT Electrical Shock Hazard. Electrical shock can cause personal injury. Disconnect power before begining to service components Water Pump 1. Remove front panel. 2. Unplug water pump electrical connection. 3. Drain water reservoir. 4. Use corbin clamp pliers to loosen and slide corbin clamps on hoses away from pump.
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Page 25: 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. Reclaim programs are available thru most refrigerant wholesalers.