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AFE325
AFE325 Product Manual
Purpose of this manual: To provide detailed The refrigeration system is either air or water
installation and operation instructions; to give cooled, and it uses R-134a as a refrigerant. The
insights into how the machine works; to list control system uses thermostat as a bin control
possible causes for problems; and to suggest and a water pressure switch as the water safety
procedures for specific types of service. control.
The AFE325 is an ice maker that makes and
s
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AFE325 Specifications: The finish for this machine is either Scotsman assumes no painted enamel or stainless steel. No liability or responsibility of panel kit is available to convert an any kind for products enamel machine to stainless steel. manufactured by Scotsman that have been Scotsman ice machines, like the altered in any way, AFE325, are designed to be installed including the use of parts indoors, in a controlled environment. and/of other components The minimum and maximum not specifical
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AFE325 To The Installer: A professional installation of any product is critical Water Quality: to the long term satisfaction of the user. The The quality of the water supplied to the machine AFE325 is designed to be installed indoors, near a will directly affect the purity of the ice and the drain. Determine the location from the anticipated reliability of the machine. While the condition of the use and any options planned for. water supplied to a building is normally out of the This air cooled
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AFE325 For The Plumber Drains: The ice maker requires a gravity drain for There are two drains and one water inlet the reservoir overflow and bin drain. The pitch on connection to make. the drain tubes must be at least 1/4 inch fall per The drains are: a copper bin drain tube; and a foot of horizontal run. On long horizontal runs, a rubber reservoir overflow tube. vent at the back of the cabinet will improve The water inlet connection is a 3/8" male flare. draining, and is recommended. Route a d
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AFE325 For The Electrician Electrical connections: To make the electrical connection, remove the following parts: Follow All Local, State & National Codes •Top panel Check the nameplate for voltage and current •Bin door requirements. An electrical cord is not supplied. •Rubber moulding Connect the AFE325 to a separate electrical circuit. Wiring to the machine must conform to all •Left moulding cover codes. A licensed electrician may be required in •Left track some situations. The electrical conn
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AFE325 Final Check List & Initial Start Up 1. Is the machine located indoors where the Initial Start Up temperature limitations are not exceeded? 1. Remove the following parts: 2. Is there at least 6" clearance on the left side and •Top panel the back of the cabinet for adequate air flow? •Bin door 3. Is the water supply adequate, and has a shut off •Rubber molding valve been installed? •Left molding cover 4. Is the cabinet level? •Left track 5. Have all of the electrical and drain connections •
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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. This is a vertical cylinder full of water and refrigerated. Also in the cylinder is a slowly rotating auger. The auger forces the ice up the evaporator walls and compresses it at the top. The resulting flaked ice then falls by gravity in
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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. Bin Thermostat: This thermostat turns the machine on and off in response to changes in 0 temperature of the capillary tube. It opens at 35 F. 0 and closes at 45 F. The capillary tube is mounted on the inside of the ice chute. Toggl
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AFE325 Refrigeration System Operation The AFE325 uses a forced draft air cooled System Characteristics: condenser, capillary tube and hermetic Note: This ice machine has a sealed compressor. The system uses R-134a as a refrigeration system. Tap into the system ONLY refrigerant. High pressure, high temperature when it’s absolutely necessary. After tapping refrigerant is forced thru the condenser where it in, recovery, repair, evacuation and recharging, looses enough heat to condense. The high th
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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. Inside the evaporator there is a water seal. This seal is the type that has a rotating half and a stationary half. The area where the two seals touch are smooth flat surfaces. When
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AFE325 Mechanical Operation ELECTRICAL SEQUENCE •As the compressor runs, the low side or suction pressure begins to fall, when it reaches a preset There are two circuits in the AFE325: one is a point, the contacts within it move, opening 3 series circuit with several switches connected in series to the compressor. The other is a parallel and 2, then closing 1 and 2. The power for the branch of the series circuit, controlling the gear gearmotor is then connected to a point in the drive motor. ser
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AFE325 Sanitation and Cleaning Maintenance: 8. Slowly pour the cleaning solution into the water reservoir until it is full. Wait 15 minutes, then The water and ice making systems will need to be switch the master switch to ON. periodically sanitized and de-mineralized. The air cooled condenser will also need to be kept clean. 9. As the ice maker begins to use water from the Detailed instructions are provided on page 14. reservoir, continue to add more cleaning solution to maintain a full reserv
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AFE325 Maintenance and Cleaning In some areas, the water supply to the ice maker To Inspect the Auger: will contain a high concentration of minerals, and 1. Disconnect electrical power and shut off the that will result in an evaporator and auger water. becoming coated with these minerals, requiring a more frequent removal than twice per year. If in 2. Remove the two screws from the spout at the doubt about the condition of the evaporator and side of the evaporator. Pull the spout away from auger
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AFE325 Maintenance: Air Cooled Condenser, Bearings 1. Disconnect electrical power. 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 Electrical Shock Hazard may require more intense methods. In addition, Disconnect electrical the auger bearings require physical inspection to power before beginning. determine that they are not
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AFE325 Maintenance: Component Inspection Auger. The auger is made of stainless steel. It has 10. Push the auger down, and rotate the breaker a polished surface that may be very shinny or dull. until the screw hole lines up with the pilot hole in Allow the auger to dry, if mineral scale is found on the evaporator. the auger’s surface, clean off the auger with ice 11. When the auger is completely seated, reinstall machine cleaner and a scrubbing pad. the breaker screws. Remove the water seal and
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AFE325 Service Diagnosis Problem Possible Cause Probable Correction No ice, nothing is operating. Unit has no power. Restore power. If breaker or fuse tripped, check for overloaded circuit or short circuit. Master switch off Switch unit on. Determine why switch was off. No water (water safety switch Restore water supply. Check open) filters or strainer. Spout switch open Check bin thermostat for failure to open and shut off machine. Check spout for internal pitting. Bin thermostat open Check air
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AFE325 Service Diagnosis PROBLEM POSSIBLE CAUSE PROBABLE CORRECTION Unusual noise Mineral scale in evaporator Clean water system with ice machine cleaner. Auger coupling dry Grease coupling Auger coupling worn Replace coupling and adapter stand. Bearings worn Replace bearings and water seal. Gearmotor loose on frame Tighten bolts, check grommets Low water level Check water level in reservoir Tubing vibrating Check tubing for contact Tooth on a gear missing Check gears in auger drive Compressor
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AFE325 Removal and Replacement Water System 4. Thread in a threaded rod and weight or slide-hammer puller into the auger. The water system consists of the reservoir and inlet water valve. 5. Use the threaded rod & weight or slide hammer puller to remove the auger. Reservoir. Or 1. Shut off the water supply. 1. Remove three cap screws holding evaporator to 2. Remove the top panel. the adapter stand. 3. Remove the left side panel. 2. Lift evaporator up slightly and tip the bottom out to expose th
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AFE325 Water Seal & Bottom Bearing Replacement: 1. Remove old rotating half from the auger. Clean Evaporator the mounting area. Follow all steps to remove the auger & bearings. 2. Place a bead of food grade sealant (such as 1. Recover the refrigerant charge. Note: The Scotsman part number 19-0529-01) onto the refrigeration system must not remain open for shoulder of the auger where the rotating half of the more than 15 minutes. water seal will be installed. 2. Unsweat suction and cap tube conne
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AFE325 Refrigeration System This ice machine uses R-134a as the refrigerant. This refrigerant has no chlorine, and therefore Temperature Pressure Chart, Selected Points requires polyolester type refrigerant oil. This oil 0 Temperature in F. PSIG of R-134a requires specific service procedures. -10 2.0 Service Recommendations: -6 3.7 This ice machine has a sealed refrigeration -4 4.6 system. It must not be tapped into unless absolutely necessary. If access is required, tap into -2 5.5 the "process
