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INTRODUCTION
To the owner or user: The service manual you are
reading 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.
TABLE OF CONTENTS
Installation
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Storage Bin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
For the Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Reservoir and Bin Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Bearing and Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Water Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Gear motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Fan Motor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Electronic Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper.
This manual was printed on recycled paper. Keep
it for future reference.
Note the Warning symbol where it appears, it
marks a possible hazard.
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
NME1850 & FME2400
This product contains 2 separate ice making
systems in one cabinet.
January 1994
Page 1
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Related Manuals for Scotsman FME2400
Summary of Contents for Scotsman FME2400
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Page 1: Table Of Contents
This manual was printed on recycled paper. Keep it for future reference. Note the Warning symbol where it appears, it marks a possible hazard. NME1850 & FME2400 This product contains 2 separate ice making systems in one cabinet. January 1994... -
Page 2: For The Installer
NME1850 & FME2400 FOR THE INSTALLER The FME2400 and the NME1850 are designed to fit the following Scotsman storage bins: B90 and extensions (with bin top KBT18) BH800 no bin top required. BH900 using bin top KBT14. BH1360, no bin top required. -
Page 3: For The Installer: Environmental Limitations
They meet or exceed the standards of UL, NSF, and CUL. Scotsman assumes no liability or responsibility of any kind for products manufactured by Scotsman that have been altered in any way, including the... -
Page 4: For The Installer
NME1850 & FME2400 FOR THE INSTALLER Typical Storage Bin with Extension and Bin Top Location: After uncrating and inspection, the unit is ready for installation. It is important that the machine be installed in a location where it has enough space around it to be accessible for service, and minimum of 6"... -
Page 5: For The Installer: Location
NME1850 & FME2400 FOR THE INSTALLER: Location ALLOW ROOM FOR AIR DO NOT STACK ANYTHING IN CIRCULATION FRONT OF THE MACHINE(S) AND SERVICE ACCESS January 1994 Page 5... -
Page 6: For The Plumber
NME1850 & FME2400 FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet Air Cooled Models: The recommended water supply is clean, cold water. Use 3/8" O.D. copper tubing, and connect to the single 3/8" male flare at the back of the cabinet. This connection supplies water to both ice making systems. -
Page 7: For The Electrician
The machine requires a solid chassis to earth ground wire. WATER COOLED AIR COOLED NME1850 & FME2400 The ice maker should be connected to its own electrical circuit so it would be individually fused. Voltage variation must remain within design limitations, even under starting conditions. -
Page 8: Final Check List
NME1850 & FME2400 FOR THE INSTALLER 1. Is the ice system installed indoors in a location where the air and water temperatures are controlled, and where they do not exceed the design limitations? 2. Is there an electrical service disconnect within... -
Page 9: Start Up
The suction line temperature at the compressor is normally very cold, nearly to the point of frost up to the compressor body, but not on it. NME1850 & FME2400 Pre-Start Inspection 3. Inspect the interior of the machine for loose screws or wires. -
Page 10: Component Description
NME1850 & FME2400 COMPONENT DESCRIPTION Control Box: Contains the electrical controls that operate the machine. High Pressure Cut Out Switch : A manual reset switch sensing the high side refrigeration pressure. It is set to shut the machine off if the discharge pressure should ever exceed 450 psig. -
Page 11: Component Description: Control Box
Transformer: Supplies low voltage to the circuit board. Low Pressure Cut Out Switch: A manual reset control that shuts off the ice machine when the low side pressure drops below a preset point, 0-4 psig. Potential Relay : The compressor start relay. - Page 12 NME1850 & FME2400 COMPONENT DESCRIPTION Evaporator : A refrigerated vertical tube filled with water and containing a water seal and auger. Auger: A solid stainless steel double spiral auger, it pushes the ice crystals up to the top of the evaporator.
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Page 13: Electrical Sequence
15 seconds (bin full). At that point, the bin empty light goes out, and the machine shuts down. NME1850 & FME2400 Shut Down consists of: The compressor relay opens. The compressor contactor opens... -
Page 14: Operation
NME1850 & FME2400 OPERATION: Water Water enters the machine through the 3/8" male flare at the rear of the cabinet, splits into two separate lines, flows to a strainer at each reservoir and then to each water reservoir which it enters through the float valve. -
Page 15: Operation: Refrigeration
LINE MOTOR HIGH PRESSURE CUT OUT SWITCH NME1850 & FME2400 At the evaporator, the refrigerant enters an area of relatively low pressure, where it can easily "boil off" or evaporate. As it evaporates, it absorbs heat from the evaporator and whatever is in contact with it (such as the water inside it). -
Page 16: Maintenance And Cleaning
To properly clean and maintain this product, these steps must be followed for both systems. 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 17 2. The ice machine senses water level by a probe located in the water reservoir. At least twice a year, the probe should be removed from the reservoir, and the tip wiped clean of mineral build-up.
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Page 18: Maintenance: Air Cooled
NME1850 & FME2400 MAINTENANCE: Air Cooled 5. Clean each air cooled condenser. Use a vacuum cleaner or coil cleaner if needed. Do NOT use a wire brush. Disconnect electrical power before beginning. A. Remove top panel. PANEL B. Remove two screws, and unplug the fan motors. -
Page 19: Maintenance And Cleaning: Auger
2. Push back bail clamp holding ice chute cover to ice chute, and remove cover. 3. Unscrew and remove ice sweep. 4. Loosen band clamp under ice chute, and remove ice chute from evaporator. NME1850 & FME2400 /////////////WARNING/////////////// The auger has sharp edges, handle with care. //////////////////////////////////////////// 5. -
Page 20: Service Diagnosis
NME1850 & FME2400 SERVICE DIAGNOSIS: Condition - No Ice Being Produced STATUS: NOTHING OPERATES A. Check: Voltage to the unit, restore it if there is none. Compare to the nameplate. B. Check: The master switch , switch ON if off. - Page 21 If the bin empty light is still OFF, check the circuit board . 1. Unplug ‘‘opto trans’’ and ‘‘LED’’ connectors from the circuit board. 2. Plug ‘‘opto trans’’ and ‘‘LED’’ connectors from the Scotsman Electronic Control Tester Model NM1 into the circuit board.
- Page 22 NME1850 & FME2400 SERVICE DIAGNOSIS: Condition - No Ice Produced STATUS: GEAR MOTOR OPERATES, COMPRESSOR DOES NOT A. Check the compressor relay. The relay is on the circuit board, if it does not supply power to the contactor coil, the compressor will not run.
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Page 23: Service Diagnosis: Condition - Low Ice Production
The compressor should pull down to 25 inches of vacuum and hold there for three to five minutes. NME1850 & FME2400 January 1994 Page 23... -
Page 24: Removal And Replacement: Water Reservoir & Bin Controls
NME1850 & FME2400 REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls WATER RESERVOIR 1. Shut off water supply. 2. Remove front panel. 3. Remove reservoir cover. 4. Disconnect water inlet tube from reservoir inlet fitting. 5. To remove float valve, push in on "locking tab"... -
Page 25: Removal And Replacement: Bearing And Breaker
7. Reverse to reassemble: specific tools and materials are required to install properly. a. Add food grade grease such as Scotsman part number 19-0569-01 to the seal area before installing on the auger. b. Check the seal to shaft areas for cuts, or rough spots: none are permitted. -
Page 26: Removal And Replacement: Auger
NME1850 & FME2400 REMOVAL AND REPLACEMENT: Auger To Remove the Auger: Turn off the water to the machine, and unclip the evaporator drain hose, pull it down and drain the evaporator into the bin or a container. 1. The top panel must be removed. -
Page 27: Removal And Replacement: Water Seal
4. Place a small bead of food grade silastic sealant (such as 732 RTV or Scotsman part number 19-0529-01) on the area of the auger where the water seal is to be mounted. -
Page 28: Removal And Replacement: Evaporator
NME1850 & FME2400 REMOVAL AND REPLACEMENT: Evaporator To Replace the Evaporator: (Assuming all the steps for removal of the thrust bearing, breaker, auger, and water seal have been performed.) Disconnect electrical power before beginning. 1. Discharge the refrigerant from the ice maker. -
Page 29: Gear Motor
(with drive motor attached) up and away from the gear motor case. Note: The gearcase cover, output gear, bearings and output shaft are a pressed together assembly. January 1994 Page 29 NME1850 & FME2400 CENTRIFUGAL SWITCH AUGER DRIVE MOTOR ROTOR BEARING SEAL... -
Page 30: Fan Motor Assembly
NME1850 & FME2400 REMOVAL AND REPLACEMENT Removing Condenser Fan Motor Assembly Disconnect electrical power before beginning. LOCATING PINS 1. Remove the top panel. 2. Unplug the two fan motor wire leads from the fan motors. 3. Remove two hex head bolts from top end of fan motor assembly, (see the illustration). -
Page 31: Removal And Replacement: Refrigeration System
Removal and Replacement: Refrigeration System This ice machine uses R-404A refrigerant and polyolester oil. Do NOT use mineral oil in this refrigeration system. R-404A is a "Near Azeotrope" so liquid charging is required: When the system is serviced, a special liquid line drier is required. It is included with replacement compressors. -
Page 32: Circuit Board Testing
SWITCH TO ‘‘FULL ’’ 3. Unplug ‘‘water sen’’ connector from control board. 4. Plug ‘‘water sen’’ connector from Scotsman tester into circuit board. Bin Control a. Move the ‘‘bin full’’ switch on the tester to Full. The light on the tester should be ON.
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