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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
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: Coupling Instructions · · · · · · · · · · · · · · · · · · · · · · · · · · Page 7
FOR THE INSTALLER: Location · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 8
FOR THE PLUMBER · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 9
FOR THE ELECTRICIAN · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 10
FOR THE ELECTRICIAN: Fan Relay Kit
FOR THE INSTALLER: Completed Installation · · · · · · · · · · · · · · · · · · · · · · · · · · Page 12
FOR THE INSTALLER: Final Check List · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 13
START UP · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 14
COMPONENT DESCRIPTION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 15
COMPONENT DESCRIPTION: Control Box · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 16
ELECTRICAL SEQUENCE: · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 17
OPERATION: Water · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 18
OPERATION: Refrigeration · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 19
OPERATION: Refrigeration · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 20
MAINTENANCE AND CLEANING · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 21
Sensor Maintenance · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 22
Bearing Maintenance · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 23
Auger Maintenance · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 24
SERVICE DIAGNOSIS: No Ice · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 25
SERVICE DIAGNOSIS: Low Capacity · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 26
CONTROL SYSTEM DIAGNOSTICS
REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls · · · · · · · · · · · · · · · Page 28
REMOVAL AND REPLACEMENT: Bearing and Breaker
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 Service · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 34
Parts Lists and Wiring Diagrams are located in the center of this manual.
NME954R & FME1204R
The ice machines covered in this manual are a
remote condenser type modular ice system that fits
a variety of Scotsman storage bins. They feature:
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.
Table of Contents
· · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 11
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 27
· · · · · · · · · · · · · · · · · · · · Page 29
January 2000
Page 1
This Manual Was Printed
On Recycled Paper
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Table of Contents
Related Manuals for Scotsman FME1204R
Summary of Contents for Scotsman FME1204R
- Page 1 The ice machines covered in this manual are a remote condenser type modular ice system that fits a variety of Scotsman storage bins. They feature: front service for the freezer, gear motor, control box, water reservoir, and bin control; an electronic circuit for monitoring ice and water level;...
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Page 2: For The Installer
NME954R & FME1204R FOR THE INSTALLER Either the FME1204R or the NME954R is designed to fit the following Scotsman storage bins: · SB480 and extensions (with bin top KBT18) · BH800 using bin top KBT15 (one unit) or KBT25 (two units). -
Page 3: Remote Condenser Specifications
REMOTE CONDENSER SPECIFICATIONS Model Use with ERC151-32 1 FME1204R or 1 NME954R ERC302-32 1 or 2 FME1204Rs or NME954Rs 2.75 Air Discharge 14.53 Air Intake Other Required Items: RTE25 Precharged line set, 25’, R-404A or RTE40. Precharged line set, 40’, R-404A. - 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 NME954R & FME1204R · Route a line set that rises, then falls, then rises. · Route a line set that falls, then rises, then falls. Calculation Example 1: The condenser is to be located 5 feet below the ice machine and then 20 feet away horizontally. -
Page 6: For The Installer: Remote Condenser
NME954R & FME1204R 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: Coupling Instructions
Schrader Valve TO REMOTE CONDENSER NME954R & FME1204R 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
NME954R & FME1204R FOR THE INSTALLER: Location TWO UNITS ON ONE CONDENSER REMOTE CONDENSER ROOF CUTAWAY EXCESS PRECHARGED SERVICE TUBING INSIDE ACCESS ICE MAKERS BUILDING SERVICE ACCESS SIDE AND BACK WALL CUTAWAY January 2000 Page 8... -
Page 9: For The Plumber
NME954R & FME1204R FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet Connect a cold potable water supply Water Inlet to the ice machine. Use 3/8" O.D. 3/8" Male Flare copper tubing and connect it to the 3/8" male flare at the back of the cabinet. -
Page 10: For The Electrician
NME954R & FME1204R FOR THE ELECTRICIAN CONFORM TO ALL APPLICABLE CODES Connect the electrical power to the ice machine through the junction box at the back. Check the nameplate (located on the back panel) for the voltage requirements, and for the minimum circuit ampacity. -
Page 11: For The Electrician: Fan Relay Kit
Possible Location For KCMR230 Control Box NME954R & FME1204R 6. Check phasing of the electrical circuit as follows: A. The phasing of the wiring MUST now be checked, as incorrect phasing will result in a failure of the kit relay. -
Page 12: For The Installer: Completed Installation
NME954R & FME1204R FOR THE INSTALLER: Completed Installation Roof Cut-Away A typical installation should generally appear as illustrated below. The best place for the remote condenser is above the ice machine, although other locations are permisable. January 2000 Page 12... -
Page 13: For The Installer: Final Check List
NME954R & FME1204R 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 Roof Holes exceed the design limitations? Sealed? 2. Is there an electrical service... -
Page 14: Initial Start-Up
NME954R & FME1204R INITIAL START UP 1. Remove the front, left, and right side service panels. 2. Check that any shipping blocks have been removed. 3. Inspect the interior of the machine for loose screws or wires. Check that no refrigerant lines are rubbing each other. -
Page 15: Component Description
Cut Out Pump Down Pressure Switch Compressor NME954R & FME1204R Water Level Sensor: Senses if there is water in the reservoir to make ice out of. Will shut the machine off it there is none. Ice Discharge Chute: Directs the ice produced by the evaporator into the storage bin. -
Page 16: Component Description: Control Box
NME954R & FME1204R COMPONENT DESCRIPTION: Control Box 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. The relays are for the... -
Page 17: Electrical Sequence
6 seconds or longer. When that occurs the bin full light glows and the machine shuts down. NME954R & FME1204R Shut Down: · Normal = The compressor relay opens, LED1 goes out. -
Page 18: Operation: Water
NME954R & FME1204R 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 them goes out the bottom of the reservoir tank to the bottom of the evaporator. -
Page 19: Operation: Refrigeration
Pressure Control Valve Receiver NME954R & FME1204R 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 20 NME954R & FME1204R OPERATION: Refrigeration Low Condensing Temperature 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: Maintenance And Cleaning
That chemical dissolves mineral build up that forms during the ice making process. Sanitize the ice storage bin as frequently as local health cods require, and every time the ice machine is cleaned and sanitized. -
Page 22: Sensor Maintenance
Sensors Slide Left To Remove 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 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
NME954R & FME1204R Auger Maintenance 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 25: Service Diagnosis: No Ice
SERVICE DIAGNOSIS: No Ice Symptom No ice is made, nothing operates No ice, auger motor is turning NME954R & FME1204R 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: Low Capacity
Check base of evaporator & drip pan. If the seal leaks, shut off the wter, 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
NME954R & FME1204R REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls WATER RESERVOIR 1. Shut off the water supply to the ice maker. 2. Remove front panel and reservoir cover. 3. To remove float only, disconnect water inlet compression fitting at reservoir inlet. -
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
NME954R & FME1204R 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. Remove the top panel. -
Page 31: 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 32: Removal And Replacement: Evaporator
NME954R & FME1204R 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. Discharge the refrigerant from the ice maker. 2. Unsweat the refrigerant connections: a) At the thermostatic expansion valve outlet. -
Page 33: Removal And Replacement: Gear Motor Assembly
C) Inspect the oil, gears, and bearings. If the oil level and condition is acceptable, quickly NME954R & FME1204R check the gears and bearings. They are likely to be fine if the oil is. If there is evidence of water in the oil (rusty bearings and gears;... -
Page 34: Refrigeration Service
NME954R & FME1204R Refrigeration Service 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.