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Scotsman FM2400RH Service Manual

Scotsman fm2400rh ice machine: user guide
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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.
The FM2400RH (remote high side) is the freezer
portion of a commercial ice machine. It is designed
to be connected to the condensing section of a
refrigeration system, specifically a supermarket
R-502 system. It consists of two evaporators, two
For the Installer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2
For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5
Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6
Initial Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7
Component Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8
Electrical Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11
Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14
Bin Controls and Reservoir . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20
Bearing and Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21
Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 22
Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 25
Circuit Board Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 26
Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper.
gearmotors, two liquid line valves, two control
boxes, two thermostatic expansion valves, and an
EPR valve.
August 1994
Page 1
FM2400RH

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Summary of Contents for Scotsman FM2400RH

  • Page 1: Table Of Contents

    The FM2400RH (remote high side) is the freezer portion of a commercial ice machine. It is designed to be connected to the condensing section of a refrigeration system, specifically a supermarket R-502 system.
  • Page 2 FM2400RH FOR THE INSTALLER: Specifications The FM2400RH is designed to fit the Scotsman storage bins BH800 or B90. Leg kit KLP4 is recommended when using both the B90 bin and an extension. Installation Limitations: The FM2400RH is BACK VIEW 20.84"...

  • Page 3: For The Installer

    FOR THE ELECTRICIAN CONFORM TO ALL APPLICABLE CODES TYPICAL INSTALLATION: ALLOW ROOM FOR SERVICE ACCESS ////////////////////////////CAUTION///////////////////////////// The FM2400RH-32B comes with a dry nitrogen holding charge. Purge and evacuate before connecting to a refrigeration system. //////////////////////////////////////////////////////////////////////// Local Codes must be observed.
  • Page 4 FM2400RH Electrical Connections: Locate the nameplate for the current requirements, and then determine the wire size and type per the National Electric Code. The machine requires a solid chassis to earth ground wire. Refer to the wiring diagram. The ice DETAIL OF machine should be connected to it’s...

  • Page 5: For The Plumber

    Use only rigid tubing for drains; insulation of the bin drain is recommended. FIELD SUPPLIED WATER FILTER August 1994 Page 5 FM2400RH 3/8" MALE FLARE 3/4" FPT VENT THIS DRAIN...

  • Page 6: Final Check List

    9. Has the bin and cabinet been wiped clean or sanitized? 10. Has the warranty registration card been properly filled out and mailed to Scotsman? 11. Has the owner been given the service manual and been instructed on how to maintain the icemaker? 13.

  • Page 7: Initial Start Up

    30 psig, + or - 4 psig. Gearmotor amp draw should not exceed the nameplate rating. 9. Check the system very carefully for any refrigerant leaks, repair as needed. float August 1994 Page 7 FM2400RH float...

  • Page 8: Component Identification

    FM2400RH COMPONENT IDENTIFICATION Liquid line valve(s) These valves operate to turn the ice making process on and off. When the ice level drops in the ice chute, the ice level sensor will cause the circuit board to close the liquid line relay, which energizes the liquid line valve for that side of the system.
  • Page 9 Reset Switch: Manual reset. Glows when the unit shuts off from the ice discharge chute being overfilled (pressure of the ice opening the microswitch at the top of the chute). Not used on FM2400RH-32B. ON/OFF SWITCH TRANSFORMER CIRCUIT BOARD...
  • Page 10 FM2400RH COMPONENT DESCRIPTION: Evaporator Evaporator: A refrigerated vertical tube filled 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. Water Seal: A two part "face" seal, the top half rotating with the auger, the bottom half stationary, the sealing action being where the two seal "faces"...

  • Page 11: Electrical Sequence

    It must be manually reset at the reset switch on the circuit board. The master switch is the manual control for each system, but it is not a service disconnect. August 1994 Page 11 FM2400RH...

  • Page 12: Operation

    FM2400RH OPERATION Water Water enters the machine through the 3/8" male flare at the rear of the cabinet, goes to the water reservoir which it enters through the float valve. The water then goes out the bottom of the reservoir tank to the bottom of the evaporator.
  • Page 13 LIQUID LINE VALVE THERMO VALVE EVAPORATORS BALL VALVES EPR VALVE August 1994 Page 13 FM2400RH the evaporator, where it boils off (evaporates) and absorbs heat. It then moves through the ball valve and into the evaporator pressure regulator valve, or EPR.

  • Page 14: Maintenance And Cleaning

    FM2400RH MAINTENANCE AND 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. It is the USER’S RESPONSIBILITY to see that the unit is properly maintained. It is always preferable, and less costly in the long run, to avoid possible down time by keeping it clean;...
  • Page 15 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...
  • Page 16 FM2400RH CLEANING In some installations the water supply to the icemaker will be so concentrated with dissolved minerals, (such as calcium carbonate) that as ice is made, the evaporator and auger become coated with the minerals, requiring a more frequent cleaning than twice per year.

  • Page 17: Service Diagnosis

    FM2400RH 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. C. Check: The reset switch, (on the circuit board): depress and release the switch. If the still does not start, check: the spout switch.
  • Page 18 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 Testor Model NM1 into the circiut board.
  • Page 19 4. If the liquid line valve relay on the circuit board has power on the NO contact, but not on the COM contact, replace the circuit board. August 1994 Page 19 FM2400RH...

  • Page 20: Removal And Replacement

    FM2400RH REMOVAL AND REPLACEMENT WATER RESERVOIR 1. Shut off the water supply to the icemaker. 2. Remove front panel and reservoir cover. 3. To remove float only, "A" models: pry the mounting flanges apart enough to lift one float pivot pin out of the flange hole, and pull float up and out of the reservoir.

  • Page 21: 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 22 Scrub the auger with ice machine cleaner and hot water. ///////////////////////////WARNING////////////////////////////// Ice machine cleaner is an acid. Handle it with extreme care, keep out of the reach of children. ////////////////////////////////////////////////////////////////////////// 2. The water seal area. Because the auger has been removed, the water seal will have to be replaced.

  • Page 23: 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 24: Evaporator

    FM2400RH 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.) 1. Shut the hand valves in the liquid and suction lines to the evaporator being serviced; then discharge the refrigerant.

  • Page 25: Gearmotor

    E) After the case is together, and the locating pins are secure in both ends, replace all cap screws. 4. Bench test the gearmotor, check for oil leaks, noise, and amp draw. SEAL MOTOR GEARCASE GASKET August 1994 Page 25 FM2400RH BEARING...

  • Page 26: Circuit Board Testing

    FM2400RH CIRCUIT BOARD TESTING ///////////////////////////////////////////////////////////////////////WARNING////////////////////////////////////////////////////////////////// These procedures require the machine to be connected to the power supply. The voltages of the electronic circuit are very low, but HIGHER VOLTAGES ARE PRESENT IN THE UNIT. Do not touch anything but the tester while the unit is being checked out. Make all connections to the circuit board with the ELECTRICAL POWER OFF.
  • Page 27 CIRCUIT BOARD TESTING Water Level 1. Unplug “water sen” connector from control board. 2. Plug “water sen” connector from Scotsman tester into circuit board. a. Move “water” switch on tester to No Water position. The No Water light on the circuit board should go ON.

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