Table of Contents
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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 is a modular ice system that fits a variety of
Scotsman ice storage bins.
FOR THE INSTALLER · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 2
SAMPLE BIN AND MACHINE COMBINATIONS · · · · · · · · · · · · · · · · · · · · · · · · · Page 3
FOR THE INSTALLER · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 4
FOR THE INSTALLER: Location · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 5
FOR THE PLUMBER · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 6
FOR THE ELECTRICIAN · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 7
FOR THE INSTALLER · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 8
INITIAL START UP · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 9
COMPONENT DESCRIPTION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 10
COMPONENT DESCRIPTION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 11
CONTROL BOX COMPONENTS
ELECTRICAL SEQUENCE: · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 13
OPERATION: Water · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 14
OPERATION: Refrigeration
OPERATION: Performance
CLEANING & SANITIZING · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 17
SENSOR MAINTENANCE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 18
AIR COOLED MAINTENANCE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 19
BEARING MAINTENANCE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 20
AUGER MAINTENANCE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 21
SERVICE DIAGNOSIS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 22
SERVICE DIAGNOSIS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 23
CONTROL SYSTEM DIAGNOSTICS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 24
REMOVAL AND REPLACEMENT: Bin Controls · · · · · · · · · · · · · · · · · · · · · · · · · Page 25
REMOVAL AND REPLACEMENT: Bearing And Breaker · · · · · · · · · · · · · · · · · · · · Page 26
REMOVAL AND REPLACEMENT: Auger · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 27
REMOVAL AND REPLACEMENT: Water Seal
REMOVAL AND REPLACEMENT: Evaporator · · · · · · · · · · · · · · · · · · · · · · · · · · Page 29
REMOVAL AND REPLACEMENT: Gear Reducer and Motor · · · · · · · · · · · · · · · · · · Page 30
REFRIGERATION SYSTEM SERVICE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 31
WHAT TO DO BEFORE CALLING FOR SERVICE · · · · · · · · · · · · · · · · · · · · · · · Page 32
NME454, 654 & FME504, 804
Table of Contents
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 12
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 15
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 16
· · · · · · · · · · · · · · · · · · · · · · · · · Page 28
January 2007
Page 1
Its features include: front service for the freezer,
gearmotor, control box, water reservoir, and bin
control; an electronic control (AutoSentryä) for
monitoring ice level, water level and drive motor
current; a thermostatic expansion valve; and
R-404A as the refrigerant.
Note this symbol when it appears.
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Table of Contents
Related Manuals for Scotsman FME504
Summary of Contents for Scotsman FME504
- Page 1 WHAT TO DO BEFORE CALLING FOR SERVICE · · · · · · · · · · · · · · · · · · · · · · · Page 32 NME454, 654 & FME504, 804 Its features include: front service for the freezer, gearmotor, control box, water reservoir, and bin control;...
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Page 2: For The Installer
NME454, 654 & FME504, 804 FOR THE INSTALLER These machines fit the following Scotsman products, check sales literature for other possible combinations: · SB480 and extensions (with bin top KBT18) · B530 using bin top KBT14 or KBT20 · B842 using bin top KBT28 ·... -
Page 3: Sample Bin And Machine Combinations
NME454, 654 & FME504, 804 SAMPLE BIN AND MACHINE COMBINATIONS FME804 ON BH550* NME654 ON BH801* The Nameplate is located on the back of the machine. A Serial Number Plate is located inside the cabinet, behind the front panel. *Bin Top Kit Required... - Page 4 NME454, 654 & FME504, 804 FOR THE INSTALLER Location: Install the machine be installed in a location where it has enough space around it to be accessible for service. A minimum of 6" must be allowed at the back and sides for air circulation on air cooled models.
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Page 5: For The Installer: Location
NME454, 654 & FME504, 804 FOR THE INSTALLER: Location ALLOW AIR SPACE ON BOTH SIDES TWO UNITS ON ONE BIN ALLOW ROOM FOR AIR CIRCULATION AND SERVICE ACCESS Airflow Notice: Airflow changed in 2006. Prior model's air flow was in the front and out the back. -
Page 6: For The Plumber
NME454, 654 & FME504, 804 FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet Air Cooled Models: Use " O.D. copper tubing to connect cold potable water to the fitting at the back of the cabinet. Install a hand valve near the machine to control the water supply. -
Page 7: For The Electrician
WATER COOLED COOLED NME454, 654 & FME504, 804 The ice machine 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 NME454, 654 & FME504, 804 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...
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Page 9: Initial 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. NME454, 654 & FME504, 804 Pre-Start Inspection are rubbing each other. Check that the fan blade turns freely (air cooled). -
Page 10: Component Description
NME454, 654 & FME504, 804 COMPONENT DESCRIPTION Control Box: Contains the electrical controls that operate the machine. High Pressure Cut Out Switch: An automatic 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 “sweep” the ice into the ice chute. WATER SEAL NME454, 654 & FME504, 804 Breaker: Where the ice is compressed and much of the extra water is squeezed out of it before it is discharged into the bin.
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Page 12: Control Box Components
NME454, 654 & FME504, 804 CONTROL BOX COMPONENTS Contactor: A definite purpose contactor connecting the compressor to the power supply. AutoSentryÔ Control Board The control board receives input signals from several sensors and translates them to control the electrical power supply to the various loads. -
Page 13: Electrical Sequence
6 seconds or longer. When that occurs the bin full light glows and the machine shuts down. NME454, 654 & FME504, 804 Shut Down: · Normal = The compressor relay opens, LED1 goes out. -
Page 14: Operation: Water
NME454, 654 & FME504, 804 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 Water Level: The correct water level should be reservoir tank to the bottom of the evaporator. -
Page 15: Operation: Refrigeration
CONDENSER LIQUID LINE MOTOR NME454, 654 & FME504, 804 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: Operation: Performance
NME454, 654 & FME504, 804 OPERATION: Performance Typical Low Side Pressure · Air Cooled: 34 - 38 PSIG · Water Cooled: 32 PSIG Typical Discharge Pressure · Air Cooled: 220 - 300 PSIG · Water Cooled: 245 PSIG Typical Compressor Amp Draw ·... -
Page 17: Cleaning And Sanitizing
CLEANING & SANITIZING 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 18: Sensor Maintenance
NME454, 654 & FME504, 804 SENSOR MAINTENANCE 1. The bin control is a device that senses light, therefore it must be kept clean so it can “see”. At least twice a year, remove the bin control sensors from the base of the ice chute, and wipe the inside clean, as illustrated. -
Page 19: Air Cooled Maintenance
Reverse to reassemble. Step 1: Remove the top panel. NME454, 654 & FME504, 804 Step 2: Remove the top portion of the fan shroud. Step 3: Clean the condenser. -
Page 20: Bearing Maintenance
NME454, 654 & FME504, 804 BEARING MAINTENANCE The bearing in the breaker should also be checked at least two times per year. A. Check the bearing by: · removing the ice chute cover Chute Cover · unscrewing the ice sweep ·... -
Page 21: Auger Maintenance
3. Unscrew and remove ice sweep. FME Components Shown, NME similar. NME454, 654 & FME504, 804 4. Remove 4 allen screws holding breaker to evaporator. 5. Pull up to remove auger. After the auger has been removed, allow the auger to dry: if the auger is not bright and shiny, it must be cleaned. -
Page 22: Service Diagnosis
NME454, 654 & FME504, 804 SERVICE DIAGNOSIS Symptom No ice is made, nothing operates No ice, auger motor is turning Unit makes ice, but very slowly. Possible Cause Unit off due to no power Unit off due to master switch in OFF position. - Page 23 SERVICE DIAGNOSIS Symptom Water Leak Excessive water use Excessive ice meltage Machine makes too much noise NME454, 654 & FME504, 804 Possible Cause Drain plugged up Tubing cracked Condensation on drain tubing Hose off Reservoir cover off Reservoir cracked Evaporator water seal leaks Water cooled model, water regulating valve not adjusted properly.
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Page 24: Control System Diagnostics
NME454, 654 & FME504, 804 CONTROL SYSTEM DIAGNOSTICS The control system consists of: · Control Board · Water Sensor · Ice Sensors · High Pressure Cut Out · Low Pressure Cut Out If the unit is OFF, check the control board: 1. -
Page 25: Removal And Replacement: Bin Controls
7. Disconnect water outlet tubes. 8. Remove the two screws holding reservoir to bracket. 9. Remove reservoir from ice machine. 10. Reverse steps 1-9 to reassemble. NME454, 654 & FME504, 804 CHUTE SLIDE BIN CONTROLS LEFT AND RIGHT FLOAT... -
Page 26: Removal And Replacement: Bearing And Breaker
NME454, 654 & FME504, 804 REMOVAL AND REPLACEMENT: Bearing And Breaker Hazardous Moving Parts. Moving auger can cause personal injury. Disconnect electrical power before beginning. Note: Removal of the auger, water seal, evaporator and gear reducer must begin at the top of the assembly. -
Page 27: Removal And Replacement: Auger
Unscrew 4 allen head cap screws holding breaker to evaporator. d. Lift up & remove breaker from evaporator. NME454, 654 & FME504, 804 e. If the auger is stuck use a slide hammer type puller to pull on the auger at the threaded hole. -
Page 28: Removal And Replacement: Water Seal
NME454, 654 & FME504, 804 REMOVAL AND REPLACEMENT: Water Seal To Remove the Water Seal: (Assuming all steps to remove the auger have been performed.) 1. The gearmotor/evaporator assembly will have to be exposed. 2. Remove the 4 hex head cap screws holding the evaporator to the gearmotor assembly. -
Page 29: Removal And Replacement: Evaporator
See “To Reassemble Evaporator and Auger” NME454, 654 & FME504, 804 To Reassemble the Evaporator and Auger 1. After the gearmotor has been inspected, fasten the evaporator to the gear motor, be sure that the... -
Page 30: Removal And Replacement: Gear Reducer And Motor
NME454, 654 & FME504, 804 REMOVAL AND REPLACEMENT: Gear Reducer and Motor Electrical Shock Hazard. Electrical shock can cause personal injury. Disconnect electrical power before beginning. To Check the Motor: 1. Remove wires from terminals 1 and 2. 2. Use an ohmmeter to check for continuity. If there is none, replace the motor only. -
Page 31: Refrigeration System Service
Sight Glass Hose Connection Schematic for Liquid Charging NME454, 654 & FME504, 804 Instructions for Liquid Charging R-404A In preparation for charging, the low side hose should have a sight glass, and/or a restricting device (such as a “Charge Faster”) installed in it... -
Page 32: What To Do Before Calling For Service
NME454, 654 & FME504, 804 WHAT TO DO BEFORE CALLING FOR SERVICE If the machine is off, not making ice: 1. Check the water supply to the ice machine. The machine is designed to shut off if there is no water to it. Check the filters if there are any.