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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.
REMOTE CONDENSER SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . .
FOR THE INSTALLER: Remote Condenser . . . . . . . . . . . . . . . . . . . . . . . . . .
FOR THE INSTALLER: Precharged Lines . . . . . . . . . . . . . . . . . . . . . . . . . . .
FOR THE INSTALLER: Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FOR THE ELECTRICIAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FOR THE ELECTRICIAN: Fan Relay Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . .
FOR THE ELECTRICIAN: Fan Relay Kit Phasing (Do After Start Up) . . . . . . . . . . . . .
FOR THE INSTALLER: Completed Installation . . . . . . . . . . . . . . . . . . . . . . . . .
FOR THE INSTALLER: Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
COMPONENT DESCRIPTION: Control Box . . . . . . . . . . . . . . . . . . . . . . . . . .
ELECTRICAL SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
OPERATION: Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SERVICE DIAGNOSIS: Condition - No Ice Being Produced . . . . . . . . . . . . . . . . . .
SERVICE DIAGNOSIS: Condition - Low Ice Production . . . . . . . . . . . . . . . . . . . .
REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls . . . . . . . . . . . . . .
REMOVAL AND REPLACEMENT: Water Seal . . . . . . . . . . . . . . . . . . . . . . . . .
REFRIGERATION SYSTEM SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND REPLACEMENT: Evaporator . . . . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND REPLACEMENT: Gear motor Assembly . . . . . . . . . . . . . . . . . . .
Parts Lists and Wiring Diagrams are located in the center of this manual, printed on
yellow paper.
TABLE OF CONTENTS
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NME950R & FME1200R
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.
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February 1995
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This Manual Was Printed On
Recycled Paper
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Related Manuals for Scotsman FME1200R
Summary of Contents for Scotsman FME1200R
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Page 1: Table Of Contents
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;... -
Page 2: For The Installer
NME950R & FME1200R FOR THE INSTALLER Either the FME1200R or the NME950R is designed to fit the following Scotsman storage bins: B90 and extensions, with bin top KBT18. BH800 using bin top KBT15 (one unit). BH800 if using two units, no bin top needed. -
Page 3: Remote Condenser Specifications
REMOTE CONDENSER SPECIFICATIONS Model Use with RCE501-32 1 FME1200R OR 1 NME950R ERC151-32 SAME RCE502-32 1 or 2 FME1200Rs or NME950Rs ERC302-32 SAME Other Required Items: RTE25 Precharged line set, 25’, R-404A or RTE40. Precharged line set, 40’, R-404A. KCMR230. Fan Relay Kit used when two 230 volt (-32) ice makers are on one 230 volt (-32) two circuit condenser. -
Page 4: Storage Bin
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: For The Installer: Remote Condenser
Tubing illustration shows tight spiral; a spiral in the field depends on tubing limitations. Tight spiral not required. Traps in tubing not required, they are included as part of the Scotsman condenser and ice machine. LOCATE REMOTE CONDENSER ABOVE ICE MAKER... -
Page 6: For The Installer: Precharged Lines
NME950R & FME1200R FOR THE INSTALLER: Precharged Lines COUPLING INSTRUCTIONS CAUTION The couplings on the sets of precharged lines are self sealing when installed properly. Carefully follow the instructions: Initial Connections: 1. Remove the protector caps and plugs. Wipe the seats and threaded surfaces with a clean cloth to be certain that no foreign matter remains on them. -
Page 7: For The Installer: Location
NME950R & FME1200R 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 December 1995 Page 7... -
Page 8: For The Plumber
NME950R & FME1200R FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES WATER INLET 3/8" MALE FLARE FIELD SUPPLIED WATER FILTER HAND SHUT OFF VALVE CONNECT TO COLD WATER VENT BIN DRAIN 3/4" FPT FLOOR DRAIN The recommended water supply is cold water. -
Page 9: For The Electrician
FOR REMOTE CONDENSER JUNCTION BOX GROUND CHASSIS NME950R & FME1200R Electrically the remote condenser fan motor is connected to the ice maker at the contactor terminals for the compressor and the fan motor operates whenever the compressor operates. Electrical connections are made at the junction box at the back of the ice maker and at the junction box on the remote condenser. -
Page 10: For The Electrician: Fan Relay Kit
NME950R & FME1200R FOR THE ELECTRICIAN: Fan Relay Kit WARNING Do all wiring with the electrical power disconnected. To install the KCMR230 fan relay kit when using (2) 230 VOLT ice makers and one 230 volt, two circuit remote condenser. -
Page 11: For The Electrician: Fan Relay Kit Phasing (Do After Start Up)
Compare the readings obtained to the ones in the following list: C. Test terminals 1-2 = Full Voltage (208-230) NME950R & FME1200R Test terminals 1-3 = No voltage Test terminals 2-3 = Full Voltage Test terminals 2-4 = No voltage... -
Page 12: For The Installer: Completed Installation
NME950R & FME1200R FOR THE INSTALLER: Completed Installation ROOF CUT-AWAY A typical installation should generally appear as illustrated below. The remote condenser must be located above the ice maker and the precharged lines installed per the instructions on page 6. -
Page 13: For The Installer: Final Check List
13. Has the electrical connection between the ice maker and the condenser been made? 14. Verify that the master switch is in the OFF position. NME950R & FME1200R REMOTE CONDENSER SECURED? LEVELED? PLUMBING? 15. Switch on the electrical power. -
Page 14: Start Up
NME950R & FME1200R START UP 1. Remove the front, left, and right side service panels. 2. Check that any styrofoam 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
CONTROL BOX HIGH PRESSURE CUT OUT COMPRESSOR NME950R & FME1200R Ice Discharge Chute: Directs the ice produced by the evaporator into the storage bin. Ice Level Sensor: An electronic "eye", it senses the presence of ice in the bottom of the ice discharge chute. -
Page 16: Component Description: Control Box
NME950R & FME1200R 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: ice level, and water level. The relays are for the gear... -
Page 17: Electrical Sequence
15 seconds (bin full). At that point, the bin empty light goes out, and the machine shuts down. NME950R & FME1200R Shut Down consists of: The liquid line solenoid closes, lowering the suction pressure. -
Page 18: Operation: Water
NME950R & FME1200R 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
HEAD PRESSURE CONTROL VALVE NME950R & FME1200R 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 NME950R & FME1200R 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
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 22 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 BREAKER & BEARING & AUGER ASSEMBLY NME950R & FME1200R Note: Water filters can filter out suspended solids, but not dissolved solids. “Soft” water may not be the complete answer. Check with a water treatment specialist regarding water treatment For more information on removal and replacement of these parts, see REMOVAL AND REPLACEMENT.
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Page 24: Service Diagnosis: Condition - No Ice Being Produced
NME950R & FME1200R SERVICE DIAGNOSIS: Condition - No Ice Being Produced 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 (high pressure): depress and release the switch. If the unit still does not start, check the spout for too much ice, or high side pressure. - Page 25 . 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 Tester Model NM1 into the circuit board .
- Page 26 NME950R & FME1200R SERVICE DIAGNOSIS: Condition - No Ice Being Produced STATUS: GEAR MOTOR OPERATES, COMPRESSOR DOES NOT A. Check the pump down control switch. 1. This pressure switch opens at 15 psig, and closes at 30 psig. If open check the low side pressure, if after running the machine the switch opens at a pressure higher than 18 psig, replace the switch.
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Page 27: Service Diagnosis: Condition - Low Ice Production
A unit with a marginal charge in summer, will be undercharged when the outside air temperature drops. The only correct way to charge this unit is to weigh in the nameplate charge. NME950R & FME1200R December 1995 Page 27... -
Page 28: Removal And Replacement: Water Reservoir & Bin Controls
NME950R & FME1200R 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
NME950R & FME1200R 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, or, if that is not... -
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 19-0529-01) on the area of the auger where the WATER SEAL water seal is to be mounted. -
Page 32: Refrigeration System Service
NME950R & FME1200R REFRIGERATION SYSTEM SERVICE This ice machine uses R-404A (HP62) 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 33: Removal And Replacement: Evaporator
3. Complete the reassembly by reversing the disassembly for the breaker & thrust bearing assembly. NME950R & FME1200R DO NOT use the access valves at the front of the unit for weighing in the charge. All liquid refrigerant must be weighed into the receiver through the “front seated”... -
Page 34: Removal And Replacement: Gear Motor Assembly
NME950R & FME1200R REMOVAL AND REPLACEMENT: Gear motor Assembly Moving Parts Hazard. Disconnect electrical power before beginning. To Remove and Repair the Gear motor Assembly: (Assuming that the procedures through removal of the water seal have been performed.) 1. Remove the electrical wires from the gear drive motor. -
Page 35: Circuit Board Testing
If the light on the tester is not on, the circuit board should be replaced. SWITCH TO “FULL” NME950R & FME1200R INSTRUCTIONS FOR USING TESTER (Optional, order part no. A33942-001) (These instructions assume that the unit will not run, and prior investigation of electric... - Page 36 NME950R & FME1200R CIRCUIT BOARD TESTING Water Level 1. Unplug “water sen” connector from control board. 2. Plug “water sen” connector from Scotsman tester into circuit board. WATER SENS SWITCH TO “NO WATER” a. Move “water” switch on tester to No Water position.
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