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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.
This machine is a modular ice system that fits a
variety of Scotsman ice storage bins.
SAMPLE BIN AND MACHINE COMBINATIONS . . . . . . . . . . . . . . . . . . . . . .
FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FOR THE ELECTRICIAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATION: Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATION: Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls . . . . . . . . . . . .
REMOVAL AND REPLACEMENT: Bearing And Breaker . . . . . . . . . . . . . . . . . .
REMOVAL AND REPLACEMENT: Water Seal . . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND REPLACEMENT: Evaporator . . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND REPLACEMENT: Gearmotor . . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND REPLACEMENT: Fans . . . . . . . . . . . . . . . . . . . . . . . . . .
REFRIGERATION SYSTEM SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . .
CIRCUIT BOARD TESTING: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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.
TABLE OF CONTENTS
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January 1995
NME950 & FME1200
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; a thermostatic expansion valve; and R-404A
as the refrigerant.
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Note the warning symbol
where it appears. It marks a
possible hazard.
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Table of Contents
Related Manuals for Scotsman FME1200
Summary of Contents for Scotsman FME1200
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Page 1: Table Of Contents
This machine is a modular ice system that fits a variety of Scotsman ice storage bins. FOR THE INSTALLER ........ -
Page 2: For The Installer
NME950 & FME1200 FOR THE INSTALLER BACK VIEW: AIR COOLED WATER INLET 3/8" FLARE DRAIN 3/4" FPT This machine is designed to fit the following Scotsman storage bins: B90 and extensions (with bin top KBT18) BH800 using bin top KBT15 (one unit). -
Page 3: Sample Bin And Machine Combinations
NME950 & FME1200 SAMPLE BIN AND MACHINE COMBINATIONS Air Flow on All Air Cooled Models is In the Front and Out the Back FME1200 ON BH550* NME950 ON BH800* The Nameplate is located on the back of the machine. FME1200 ON BH900*... -
Page 4: 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 use of any part and/or other components not specifically approved by Scotsman. - Page 5 NME950 & FME1200 FOR THE INSTALLER: Location DO NOT STACK ANYTHING IN FRONT OF THE MACHINE(S) TWO UNITS ON ONE BIN ALLOW ROOM FOR AIR CIRCULATION AND SERVICE ACCESS January 1995 Page 5...
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Page 6: For The Plumber
NME950 & FME1200 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, connect to the 3/8" male flare at the back of the cabinet. Install a hand valve near the machine to control the water supply. -
Page 7: For The Electrician
The machine requires a solid chassis to earth ground wire. WATER COOLED AIR COOLED NME950 & FME1200 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
NME950 & FME1200 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
9. Fill out the manufacturers registration card, and mail it to the Scotsman Factory. 10. Fill out the warranty registration form, and mail it to Scotsman. -
Page 10: Component Description
NME950 & FME1200 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
RELAY TRANSFORMER 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. On/Off Switch: Manual control for the machine. - Page 12 NME950 & FME1200 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. NME950 & FME1200 Shut Down consists of: The compressor relay opens. The compressor contactor opens... -
Page 14: Operation: Water
NME950 & FME1200 OPERATION: Water Water enters the machine through the 3/8" male flare at the rear of the cabinet, goes to a strainer and then 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 15: Operation: Refrigeration
Superheat 5 - 7 degrees High Pressure Cut Out 450 PSIG NME950 & FME1200 evaporator; warmer evaporators get more refrigerant and colder evaporators get less. At the evaporator, the refrigerant enters an area of relatively low pressure, where it can easily "boil off"... -
Page 16: Sanitizing And Cleaning
NME950 & FME1200 SANITIZING 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 17: Maintenance And Cleaning
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 18: Maintenance: Air Cooled
NME950 & FME1200 MAINTENANCE: Air Cooled Electrical shock hazard. Electrical shock can cause personal injury. Disconnect power before beginning to service components. 5. Clean the air cooled condenser. TO GAIN ACCESS TO CONDENSER SURFACE: 1. REMOVE TOP PANEL 2. REMOVE TWO SCREWS & UNPLUG 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. NME950 & FME1200 The auger has sharp edges, handle with care. 4. Loosen band clamp under ice chute, and remove ice chute from evaporator. -
Page 20: Service Diagnosis
NME950 & FME1200 SERVICE DIAGNOSIS: Symptom No ice is made, nothing operates No ice, auger motor is turning Unit makes ice, but very slowly. High discharge pressure Possible Cause Unit off due to no power Unit off due to master switch in OFF position. - Page 21 Poor fit between bin door and door frame with minerals Motor bearings dry January 1995 Page 21 NME950 & FME1200 Probable Correction Clean out drain Replace tubing Insulate tubing Reattach hose Return cover to reservoir Replace reservoir Check base of evaporator &...
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Page 22: Removal And Replacement: Water Reservoir & Bin Controls
NME950 & FME1200 REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls WATER RESERVOIR 1. Shut off the water supply to the ice maker. 2. Remove front panel. 3. Remove reservoir cover. 4. Disconnect water inlet tube from reservoir inlet fitting. -
Page 23: 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 24: Removal And Replacement: Auger
NME950 & FME1200 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 25: 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 26: Removal And Replacement: Evaporator
NME950 & FME1200 REMOVAL AND REPLACEMENT: Evaporator Electrical shock hazard. Electrical shock can cause personal injury. Disconnect power before beginning to service components. To Replace the Evaporator: (Assuming all the steps for removal of the thrust bearing, breaker, auger, and water seal have been performed.) -
Page 27: Removal And Replacement: Gearmotor
COVER & OUTPUT GEAR ASSEMBLY NME950 & FME1200 To Inspect the gear motor. A) Remove the cap screws holding the gear motor case halves together and pry the two cases apart. B) To lift off the cover, lift up until you can feel... -
Page 28: Removal And Replacement: Fans
NME950 & FME1200 REMOVAL AND REPLACEMENT: Fans Electrical shock hazard. Electrical shock can cause personal injury. Disconnect power before beginning to service components. To Remove the Condenser Fan Motor Assembly 1. Remove top panel. 2. Unplug the two fan motor wire leads from the fan motors. -
Page 29: Refrigeration System Service
REFRIGERATION SYSTEM SERVICE General: 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 30: Liquid Charging
NME950 & FME1200 LIQUID CHARGING Instructions for R-404A In preparation for charging, the low side hose should have a sight glass, and/or a restrictor device (such as a "Charge Faster") installed in it for metering liquid into the low side of the system. -
Page 31: Circuit Board Testing
If the Bin Empty light does not come ON, the circuit board should be replaced. PHOTO TRANS LIGHT GOES SWITCH TO ‘‘BIN EMPTY ’’ January 1995 Page 31 NME950 & FME1200 LIGHT GOES LIGHT GOES OFF... - Page 32 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.