Scotsman FME2400R Service Manual
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Scotsman FME2400R Service Manual

Scotsman FME2400R Service Manual

Scotsman fme2400r ice machine: user guide
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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.
FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2
FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3
FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5
FOR THE INSTALLER: Remote Condenser . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6
FOR THE INSTALLER: Precharged Lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7
FOR THE INSTALLER: Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8
FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9
FOR THE INSTALLER: Completed Installation . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11
START UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13
COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14
COMPONENT DESCRIPTION: Control Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15
OPERATION: Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 17
MAINTENANCE AND CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20
REMOVAL AND REPLACEMENT: Bearing And Breaker . . . . . . . . . . . . . . . . . . . . . Page 28
REMOVAL AND REPLACEMENT: Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 29
REMOVAL AND REPLACEMENT: Water Seal . . . . . . . . . . . . . . . . . . . . . . . . . . Page 30
REFRIGERATION SYSTEM SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 33
CIRCUIT BOARD TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 34
Parts Lists and Wiring Diagrams are located in the center of this manual, printed on yellow
paper.
The manual was printed on recycled paper. Keep
it for future reference.
Note the Warning symbol where it appears. It
marks a possible hazard.

TABLE OF CONTENTS

January 1995
Page 1
NME1850R & FME2400R
The product is a remote condenser modular ice
system. It features: front service for the freezer,
gear motor, control box, water reservoir, and bin
control; an electronic circuit for monitoring ice and
water level; and R-404A as the refrigerant.

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Summary of Contents for Scotsman FME2400R

  • Page 1: Table Of Contents

    Note the Warning symbol where it appears. It marks a possible hazard. NME1850R & FME2400R The product is a remote condenser modular ice system. It features: front service for the freezer, gear motor, control box, water reservoir, and bin control;...

  • Page 2: For The Installer

    NME1850R & FME2400R FOR THE INSTALLER These machines are designed to fit the following Scotsman storage bins: B90 and extensions, with bin top KBT18. BH800 no bin top needed. BH900 using bin top KBT14. When installing a new system, check to be sure that you have...

  • Page 3: For The Installer

    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: Remote Condenser Specifications

    NME1850R & FME2400R REMOTE CONDENSER SPECIFICATIONS Model Use with RCE502-32 1 FME2400R or NME1850R ERC302-32 SAME Other Required Items: RTE25 Precharged line set, 25’, R-404A - 2 required. Or: RTE40. Precharged line set, 40’, R-404A - 2 required. ERC DIMENSIONS...

  • Page 5: For The Installer

    NME1850R & FME2400R FOR THE INSTALLER Location Typical Storage Bin with Extension and Bin Top 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, usually a minimum of 6 inches.

  • Page 6: For The Installer: Remote Condenser

    NME1850R & FME2400R FOR THE INSTALLER: Remote Condenser Location Limited to a 40 foot or a 25 foot length of precharged refrigerant tubing connecting the ice maker to the remote condenser. The condenser must be above or level with the ice maker.

  • Page 7: For The Installer: Precharged Lines

    SCHRADER VALVE TO REMOTE CONDENSER NME1850R & FME2400R 4. Using a marker or pen, mark a line lengthwise from the coupling union nut to the bulkhead. Then tighten the coupling and additional 1/4 turn. As the nut turns, the line will show when 1/4 turn is made.

  • Page 8: For The Installer: Location

    NME1850R & FME2400R FOR THE INSTALLER: Location REMOTE CONDENSER ROOF CUTAWAY CONTACT ROOFING CONTRACTOR EXCESS PRECHARGED TUBING INSIDE SERVICE BUILDING ACCESS ICE MAKER SERVICE ACCESS SIDE AND BACK WALL CUTAWAY January 1995 Page 8...

  • Page 9: For The Plumber

    NME1850R & FME2400R FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet The recommended water supply is WATER INLET cold water. Use 3/8" O.D. copper 3/8" MALE tubing, connect to the 3/8" male flare FLARE at the back of the cabinet. Install a hand valve near the machine to control the water supply.

  • Page 10: For The Electrician

    NME1850R & FME2400R FOR THE ELECTRICIAN CONFORM TO ALL APPLICABLE CODES The electrical power to the unit is supplied through the junction box at the rear of the machine. Check the nameplate (located on the back panel) for the voltage requirements, and for the minimum circuit ampacity.

  • Page 11: For The Installer: Completed Installation

    NME1850R & FME2400R FOR THE INSTALLER: Completed Installation A typical installation should generally appear as illustrated below. The remote condenser must be located above the ice maker and the precharged lines installed per the instructions on page 6. INSULATED PRECHARGED...

  • Page 12: For The Installer: Final Check List

    NME1850R & FME2400R FOR THE INSTALLER: Final Check List 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 ROOF limitations? HOLES 2. Is there an electrical service...

  • Page 13: Start Up

    10. Fill out the manufacturers registration card, and mail it to Scotsman. 11. Fill out the field quality audit form, and mail it to the Scotsman factory.

  • Page 14: Component Description

    NME1850R & FME2400R COMPONENT DESCRIPTION Control Box: Contains the electrical controls that operate the machine. High Pressure Cut Out: A manual reset switch sensing the high side refrigeration pressure. It is set to shut the machine off at 450 psig.

  • Page 15: Component Description: Control Box

    ON/OFF SWITCH PUMP DOWN CONTROL POTENTIAL RELAY TRANSFORMER CIRCUIT BOARD NME1850R & FME2400R Transformer: Supplies low voltage to the circuit board. Pump Down Control: An automatic reset pressure switch connected to the low side of the refrigeration system. Controls the compressor.

  • Page 16: Electrical Sequence

    NME1850R & FME2400R ELECTRICAL SEQUENCE Refer the wiring diagram as needed. The two ice making systems operate independently except for the fan motor of the remote condenser. If either one of the systems is operating, the fan will be ON.

  • Page 17: Operation: Water

    WATER INLET RESERVOIR STRAINER CHUTE DRAIN NME1850R & FME2400R Reservoir overflow or evaporator condensation is combined into a common drain line and routed to the drain. EVAPORATOR DRAIN January 1995...

  • Page 18: Operation: Refrigeration

    NME1850R & FME2400R OPERATION: Refrigeration There are two separate refrigeration systems in this machine. Beginning at the compressor, the refrigerant is compressed into a high temperature gas. The discharge line directs this gas to the condenser. At the remote condenser the gas is cooled by air and it then condenses into a liquid.
  • Page 19 NME1850R & FME2400R Low Condensing Temperature This forces more refrigerant into the condenser (with a small amount of discharge gas going into...

  • Page 20: Maintenance And Cleaning

    These units consist of two separate ice makers; to properly clean and maintain the them, 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 21 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.
  • Page 22 NME1850R & FME2400R MAINTENANCE AND CLEANING In some areas the water supply to the ice maker will have a great deal of minerals in it, and that will result in an evaporator and auger becoming coated with these minerals, requiring a more frequent removal than twice per year.

  • Page 23: Service Diagnosis: Condition - No Ice Being Produced

    Check the water level, restore/adjust if low. b. Check the water level sensor, clean if dirty, (see maintenance). c. Check the circuit board, see next page. If the machine does not start, see the next page. NME1850R & FME2400R STATUS: NOTHING OPERATES January 1995 Page 23...
  • Page 24 . 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 into the circuit board .
  • Page 25 If there is power to the valve, the coil may be open, or the valve jammed, replace the valve Note: Pump down control Cut In and Cut Out changed in May 1995. It was CI= 17, CO=2.. NME1850R & FME2400R June 1995 Page 25...

  • Page 26: Service Diagnosis: Condition - Low Ice Production

    NME1850R & FME2400R SERVICE DIAGNOSIS: Condition - Low Ice Production STATUS: EVERYTHING IS OPERATING A. Check the condenser for dirt. Clean as required. Check the head pressure. If the head pressure is very high: 1. Check for high air temperatures, or restrictive air flow. Correct as needed.

  • Page 27: Removal And Replacement: Water Reservoir & Bin Controls

    9. Remove mounting screws from reservoir bracket and remove the reservoir from the ice maker. 10. Reverse to reassemble. SLIDE BIN CONTROLS IN AND OUT NME1850R & FME2400R FLOAT ASSEMBLY CHUTE BIN CONTROLS (Ice Level Sensors) 1. Disconnect electrical power. 2. Remove front panel.

  • Page 28: 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 29: Removal And Replacement: Auger

    Lift up on breaker to remove from auger. If the auger is stuck: NME1850R & FME2400R Use a slide hammer type puller to pull on the auger at the threaded hole. The size of that hole is 5/8"-18.

  • Page 30: Removal And Replacement: Water Seal

    4. Place a small bead of food grade silastic sealant RETAINING (such as 732 RTV or Scotsman part number RING 19-0529-01) on the area of the auger where the water seal is to be mounted.

  • Page 31: Removal And Replacement: Evaporator

    4. Unsweat the drier from the liquid line. Repeat the above, as required, for each system. FRONT SEATED KING VALVE RECEIVER NME1850R & FME2400R 5. After installing a new water seal in the new evaporator ( see “To Replace the Water Seal”) resweat the tubing connections.

  • Page 32: Removal And Replacement: Gear Motor Assembly

    NME1850R & FME2400R REMOVAL AND REPLACEMENT: Gear motor Assembly WATER SHED SEAL OUTPUT GEAR, OUTPUT SHAFT, AND BEARINGS Note: There are two gear motors in each unit. DRIVE MOTOR BEARING SEAL To Remove and Repair the Gear motor Assembly: (Assuming that the procedures through removal of the water seal have been performed.)

  • Page 33: Refrigeration System Service

    REFRIGERATION SYSTEM SERVICE General: This ice machine uses R-404A (HP62) 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 34: Circuit Board Testing

    If the Bin Empty light does not come ON, the circuit board should be replaced. Water Level 1. Unplug “water sen” connector from control board. 2. Plug “water sen” connector from Scotsman tester into circuit board. PHOTO TRANS LIGHT GOES ON SWITCH TO “BIN EMPTY”...
  • Page 35 WATER SENS SWITCH TO “NO WATER” NME1850R & FME2400R should go OFF. If not replace the circuit board. If the light does go off, replace the water level sensor. If the Bin Empty light is ON, wait 10-20 seconds for the machine to start.

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Nme1850r

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