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Scotsman AFE325 Product Manual

Scotsman ice afe325 ice maker product manual
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AFE325 Product Manual
Purpose of this manual: To provide detailed
installation and operation instructions; to give
insights into how the machine works; to list
possible causes for problems; and to suggest
procedures for specific types of service.
The AFE325 is an ice maker that makes and
stores flaked ice.
Specifications: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2
To The Installer: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3
For The Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4
For The Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5
User Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7
Component Location: Control Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8
Refrigeration System Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9
Water System Operation: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10
Mechanical Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11
Sanitation and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12
Maintenance And Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13
Maintenance: Air Cooled Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14
Maintenance: Component Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15
Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 16
Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 18
Refrigeration System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20
Gear Reducer Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21
Gear Reducer Rebuild . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 22
A Parts List and Wiring Diagram are located in the center of this manual, printed on yellow paper.
The refrigeration system is either air or water
cooled, and it uses R-134a as a refrigerant. The
control system uses thermostat as a bin control
and a water pressure switch as the water safety
control.

Table of Contents

August 1994
Page 1
AFE325

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Summary of Contents for Scotsman AFE325

  • Page 1: Table Of Contents

    The AFE325 is an ice maker that makes and stores flaked ice. Specifications: ..........Page 2 To The Installer: .

  • Page 2: Specifications

    No panel kit is available to convert an enamel machine to stainless steel. Scotsman ice machines, like the AFE325, are designed to be installed indoors, in a controlled environment. The minimum and maximum operating conditions are:...

  • Page 3: To The Installer

    To The Installer: A professional installation of any product is critical to the long term satisfaction of the user. The AFE325 is designed to be installed indoors, near a drain. Determine the location from the anticipated use and any options planned for.

  • Page 4: For The Plumber

    AFE325 For The Plumber Drains: The ice maker requires a gravity drain for the reservoir overflow and bin drain. The pitch on the drain tubes must be at least 1/4 inch fall per foot of horizontal run. On long horizontal runs, a vent at the back of the cabinet will improve draining, and is recommended.

  • Page 5: For The Electrician

    Follow All Local, State & National Codes Check the nameplate for voltage and current requirements. An electrical cord is not supplied. Connect the AFE325 to a separate electrical circuit. Wiring to the machine must conform to all codes. A licensed electrician may be required in some situations.

  • Page 6: Final Check List & Initial Start Up

    AFE325 Final Check List & Initial Start Up 1. Is the machine located indoors where the temperature limitations are not exceeded? 2. Is there at least 6" clearance on the left side and the back of the cabinet for adequate air flow? 3.

  • Page 7: User Operation

    AFE325 User Operation The AFE325 is an automatic ice flaked machine. All it requires is cool air, clean water, a drain, and an adequate supply of electrical power. The user must regularly sanitize and clean the machine. Component Location & Function Evaporator.

  • Page 8: Component Location: Control Box

    AFE325 Component Location: Control Box Auger Delay Pressure Control: This pressure switch, connected to the low side of the refrigeration system, controls the auger drive motor. On-Off switch: This toggle switch shuts off the machine. It is not a complete disconnect.

  • Page 9: Refrigeration System Operation

    At the compressor the cycle is repeated. The AFE325 uses a low side pressure control as a safety, it will shut the system down if the suction pressure is too low for reliable operation.

  • Page 10: Water System Operation

    AFE325 Water System Operation: The water system consists of a float valve and reservoir. The water level in the reservoir tank is the same level as that inside the evaporator. Building water supply flows to the float valve and the float valve opens to add water to the reservoir as water flows out to the evaporator.

  • Page 11: Mechanical Operation

    Mechanical Operation ELECTRICAL SEQUENCE There are two circuits in the AFE325: one is a series circuit with several switches connected in series to the compressor. The other is a parallel branch of the series circuit, controlling the gear drive motor.

  • Page 12: Sanitation And Cleaning

    The water system requires periodic sanitation and de-mineralization. Schedule & Responsibility: 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.

  • Page 13: Maintenance And Cleaning

    5. Inspect the auger and the water seal. Clean the auger of any mineral build up. Scotsman Ice Machine Cleaner and a scouring pad work well to clean the auger. DO NOT USE steel wool.

  • Page 14: Maintenance: Air Cooled Condenser

    Auger and Bearing Inspection While in most areas regular in-place cleaning with Scotsman Ice Machine Cleaner will be adequate to keep the interior of the evaporator free of excessive mineral build up, some water conditions may require more intense methods. In addition, the auger bearings require physical inspection to determine that they are not wearing.

  • Page 15: Maintenance: Component Inspection

    Use the grease zerk on the side of the coupling to add grease once per year. That concludes normal maintenance. If the fan motor has an oil plug, it may be oiled after 10 years of operation. August 1994 Page 15 AFE325...

  • Page 16: Service Diagnosis

    AFE325 Service Diagnosis Problem No ice, nothing is operating. No ice, auger drive is operating. Unit will not shut off. Auger motor will not shut off. Possible Cause Unit has no power. Master switch off No water (water safety switch...
  • Page 17 Gearmotor does not turn Centrifugal switch does not close Fan motor does not turn Lack of refrigerant Compressor does not pump August 1994 Page 17 AFE325 PROBABLE CORRECTION Clean water system with ice machine cleaner. Grease coupling Replace coupling and adapter stand.

  • Page 18: Removal And Replacement

    AFE325 Removal and Replacement Water System The water system consists of the reservoir and inlet water valve. Reservoir. 1. Shut off the water supply. 2. Remove the top panel. 3. Remove the left side panel. 4. Drain the water reservoir and evaporator.

  • Page 19: Water Seal & Bottom Bearing Replacement

    MUST use an HFC type drier. 7. Braze the drier connections, cap tube and suction line together. 8. Evacuate to 200 microns, and weigh in the system charge. Water Line Coupling Gear Reducer August 1994 Page 19 AFE325 Gasket...

  • Page 20: Refrigeration System

    AFE325 Refrigeration System This ice machine uses R-134a as the refrigerant. This refrigerant has no chlorine, and therefore requires polyolester type refrigerant oil. This oil requires specific service procedures. Service Recommendations: This ice machine has a sealed refrigeration system. It must not be tapped into unless absolutely necessary.

  • Page 21: Gear Reducer Removal

    Note: If there is evidence of water near the output shaft of the gear reducer, it would be a wise precaution to pull the auger from the evaporator and check the bearings. 16. Rebuild or replace the gear reducer. August 1994 Page 21 AFE325...

  • Page 22: Gear Reducer Rebuild

    AFE325 Gear Reducer Rebuild 1. After the gear reducer has been removed, the internal components may be inspected and/or replaced. Remove all bolts holding the two case halves together. 2. Tap against the roll pins at each end of the gear cases to split them.
  • Page 23 AFE325 Gear Reducer Shaft Seals, 2 are used per shaft as shown Motor Cover & Top Rotor Bearing Stator Woodruff Rotor Spacer Washer, Use To Adjust Height of Gears to Avoid Rubbing First Gear August 1994 Page 23...

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