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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 either ice system.
FOR THE INSTALLER · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 2
REMOTE CONDENSER SPECIFICATIONS · · · · · · · · · · · · · · · · · · · · · · · · · Page 3
FOR THE INSTALLER · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 4
Remote Condenser Location · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 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 ELECTRICIAN
FOR THE INSTALLER: Completed Installation · · · · · · · · · · · · · · · · · · · · · · · Page 11
FOR THE INSTALLER: Final Check List · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 12
START UP · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 13
COMPONENT DESCRIPTION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 14
OPERATION: Water · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 15
COMPONENT DESCRIPTION: Control Box · · · · · · · · · · · · · · · · · · · · · · · · · Page 16
ELECTRICAL SEQUENCE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 17
SYSTEM INFORMATION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 18
OPERATION: Refrigeration · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 19
OPERATION: Refrigeration · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 20
CLEANING and SANITATION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 21
SENSOR MAINTENANCE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 22
BEARING MAINTENANCE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 23
AUGER MAINTENANCE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 24
SERVICE DIAGNOSIS: Condition · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 25
SERVICE DIAGNOSIS: · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 26
CONTROL SYSTEM DIAGNOSTICS · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 27
REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls · · · · · · · · · · · · · Page 28
REMOVAL AND REPLACEMENT: Bearing And Breaker · · · · · · · · · · · · · · · · · · Page 29
REMOVAL AND REPLACEMENT: Auger · · · · · · · · · · · · · · · · · · · · · · · · · · Page 30
REMOVAL AND REPLACEMENT: Water Seal · · · · · · · · · · · · · · · · · · · · · · · Page 31
REMOVAL AND REPLACEMENT: Evaporator · · · · · · · · · · · · · · · · · · · · · · · Page 32
REMOVAL AND REPLACEMENT: Gear motor Assembly · · · · · · · · · · · · · · · · · · Page 33
REFRIGERATION SYSTEM SERVICE · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 34
What to Do Before Calling for Service · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 35
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
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 10
January 2000
Page 1
NME1854R & FME2404R
The product is a remote condenser modular ice
system. Its features include: 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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Table of Contents
Related Manuals for Scotsman FME2404R
Summary of Contents for Scotsman FME2404R
- Page 1 Note the Warning symbol where it appears. It marks a possible hazard. NME1854R & FME2404R The product is a remote condenser modular ice system. Its features include: front service for the freezer, gear motor, control box, water reservoir, and bin control;...
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Page 2: For The Installer
NME1854R & FME2404R 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,... -
Page 3: Remote Condenser Specifications
REMOTE CONDENSER SPECIFICATIONS Model Use with ERC302-32 1 FME2404R or NME1854R Other Required Items: RTE25 Precharged line set, 25’, R-404A - 2 required. Or: RTE40. Precharged line set, 40’, R-404A - 2 required. NME1854R & FME2404R ERC DIMENSIONS Model ERC302 "... - Page 4 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.
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Page 5: Remote Condenser Location
Condenser Located ABOVE Ice Machine Condenser Located BELOW Ice Machine NME1854R & FME2404R Configurations that do NOT meet these requirements must receive prior written authorization from Scotsman. Do NOT: · Route a line set that rises, then falls, then rises. -
Page 6: For The Installer: Remote Condenser
NME1854R & FME2404R FOR THE INSTALLER: Remote Condenser Location Select the best available location, protecting the condenser from extremes of dirt, dust, and sun. Meet all applicable building codes. Usually the services of a licensed electrician are required. Roof Attachment 1. -
Page 7: For The Installer: Precharged Lines
SCHRADER TO REMOTE CONDENSER NME1854R & FME2404R 4b. Using two wrenches, one to rotate the swivel nut and one to hold the tubing, tighten each coupling. It is CRITICAL that ONLY the NUT on the... -
Page 8: For The Installer: Location
NME1854R & FME2404R FOR THE INSTALLER: Location REMOTE CONDENSER ROOF CUTAWAY CONTACT ROOFING CONTRACTOR EXCESS PRECHARGED TUBING INSIDE SERVICE BUILDING ACCESS ICE MACHINE SERVICE ACCESS SIDE AND BACK WALL CUTAWAY January 2000 Page 8... -
Page 9: For The Plumber
NME1854R & FME2404R FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet Connect the ice machine to cold WATER INLET potable water. Use 3/8" O.D. copper 3/8" MALE tubing, and 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
POWER SUPPLY Electrical connections are made at the junction box at the back of the Ice Machine and at the junction box on the remote condenser. The remote condenser must be wired to the Ice Machine in accordance with local and national electrical codes with a minimum of 18 Awg. -
Page 11: For The Installer: Completed Installation
NME1854R & FME2404R FOR THE INSTALLER: Completed Installation A typical installation should generally appear as illustrated below. The remote condenser must be located above the Ice Machine and the precharged lines installed per the instructions on page 6. INSULATED PRECHARGED... -
Page 12: For The Installer: Final Check List
NME1854R & FME2404R 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 limitations? 2. Is there an electrical service... -
Page 13: Start Up
32 psig + or - 2 psig. The discharge pressure will depend upon air and water temperatures, but should be between 205 psig and 280 psig. NME1854R & FME2404R Pre-Start Inspection Start Up 7. THERE ARE NO ADJUSTMENTS TO MAKE, so replace the panels. -
Page 14: Component Description
NME1854R & FME2404R COMPONENT DESCRIPTION Control Box: Contains the electrical controls that operate the machine. High Pressure Cut Out: An automatic reset switch sensing the high side refrigeration pressure. It is set to shut the machine off at 450 psig. -
Page 15: Operation: Water
NME1854R & FME2404R OPERATION: Water Water enters the machine through the 3/8" male flare at the rear of the cabinet, divides into two inlet lines to each water reservoir which it enters through the float valve. The water them goes out the bottom of the reservoir tanks to the bottom of the evaporators. -
Page 16: Component Description: Control Box
NME1854R & FME2404R COMPONENT DESCRIPTION: Control Box There are two control boxes in the machine. Contactor: A definite purpose contactor connecting the compressor and the remote condenser fan motor to the power supply. Circuit Board: Controlling the ice machine through sensors and relays. The sensors are for ice level and water level. -
Page 17: Electrical Sequence
6 seconds or longer. When that occurs the bin full light glows and the machine shuts down. NME1854R & FME2404R Shut Down: · Normal = The compressor relay opens, LED1 goes out. -
Page 18: System Information
NME1854R & FME2404R SYSTEM INFORMATION Information @ 90 Typical Suction Pressure 35 PSIG · Typical Discharge Pressure 260 PSIG · Minimum Discharge pressure (low temps) 180 PSIG · Typical Compressor Amps Single Phase = 4.3 · Three Phase = 2.8 ·... -
Page 19: Operation: Refrigeration
PRESSURE CONTROL VALVE RECEIVER NME1854R & FME2404R or evaporate. As it evaporates, it absorbs heat from the evaporator and whatever is in contact with it (such as the water inside it). After the evaporator, the refrigerant, now a low pressure vapor, goes through the suction line back to compressor, where the cycle is repeated. - Page 20 NME1854R & FME2404R OPERATION: Refrigeration There are two separate refrigeration systems in this machine. The refrigeration system under low condenser air temperatures is much the same as it is under higher temperatures, with the exception that the resulting low head pressures cause the head pressure control to close off the liquid line between the condenser and the receiver.
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Page 21: Cleaning And Sanitation
These units consist of two separate Ice Machines; to properly clean and maintain the them, these steps 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 22: Sensor Maintenance
ICE LEVEL SENSORS must be followed for both systems. 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 23: Bearing Maintenance
If the bearing only needs grease, inject grease into Ice Sweep the bearing using Scotsman grease needle pn 02-3559-01 and Scotsman bearing grease cartridge, pn A36808-001. Be sure to inject grease evenly and thoroughly. -
Page 24: Auger Maintenance
NME1854R & FME2404R AUGER MAINTENANCE In some areas the water supply to the Ice Machine 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 25: Service Diagnosis: Condition
SERVICE DIAGNOSIS: Condition Symptom No ice is made, nothing operates No ice, auger motor is turning NME1854R & FME2404R Possible Cause Unit off due to no power. Unit off due to master switch in Off position Unit off due to low water level in... -
Page 26: Service Diagnosis
Check base of evaporator & drip pan. If the seal leaks, shut off the water, remove the auger, replace the water seal. Check gear motor for water infiltration. Clean out bin drain Adjust or replace Clean with Scotsman Ice Machine Cleaner Oil or replace motor... -
Page 27: Control System Diagnostics
If it is on, the ice sensors may be blocked. Remove them and check for mineral scale. Scotsman's test box can also be used to determine if the ice sensors or board are defective. -
Page 28: Removal And Replacement: Water Reservoir & Bin Controls
NME1854R & FME2404R REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls WATER RESERVOIR 1. Shut off the water supply to the Ice Machine. 2. Remove front panel and reservoir cover. 3. Disconnect water inlet tube from reservoir inlet fitting. 4. To remove float valve, push in “locking tabs” as shown and pull float up. -
Page 29: 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 30: Removal And Replacement: Auger
NME1854R & FME2404R REMOVAL AND REPLACEMENT: Auger Note that the auger has very sharp edges. Moving parts hazard. Disconnect electrical power before beginning. 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. -
Page 31: Removal And Replacement: Water Seal
Remove the old part from the auger and clean the mounting area. 4. Place a small bead of food grade silastic sealant (such as 732 RTV or Scotsman part number RETAINING 19-0529-01) on the area of the auger where the RING water seal is to be mounted. -
Page 32: Removal And Replacement: Evaporator
NME1854R & FME2404R REMOVAL AND REPLACEMENT: Evaporator Disconnect electrical power before beginning. Shut off the water supply before beginning. To Replace the Evaporator: (Assuming all the steps for removal of the thrust bearing, breaker, auger, and water seal have been performed.) -
Page 33: Removal And Replacement: Gear Motor Assembly
2. Unscrew the 4 cap screws holding the gear motor to the gear motor plate. 3. Remove the gear motor from the Ice Machine. To Inspect the gear motor. A) Remove the cap screws holding the gear motor case halves together and pry the two cases apart. -
Page 34: Refrigeration System Service
NME1854R & FME2404R REFRIGERATION SYSTEM SERVICE General: This ice machine uses R-404A refrigerant and polyolester oil. Do NOT use mineral oil in this refrigeration system. · When the system is serviced, a special liquid line drier is required. It is included with replacement compressors. -
Page 35: What To Do Before Calling For Service
NME1854R & FME2404R 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.