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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.
Installation
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
For the Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Electrical Sequence . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Reservoir and Bin Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Slide Out Chassis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Bearing and Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Electronic Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper.
TABLE OF CONTENTS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
December, 1988
The NS650 is a complete ice system that
produces and stores nugget ice.
It features: front service for the condenser,
control box, and water reservoir; a slide out
chassis; an electronic circuit for monitoring ice
and water level; a thermostatic expansion
valve; and R-502 as the refrigerant.
Page 1
NS650
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Table of Contents
Related Manuals for Scotsman NS650
Summary of Contents for Scotsman NS650
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Page 1: Table Of Contents
Electronic Tester ......... 30 Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper. The NS650 is a complete ice system that produces and stores nugget ice. -
Page 2: For The Installer
Correct Ice Machine (air or water cooled) All kits, legs, and information required for the specific job. The normal finish for the ice machine is enamel-sandalwood. A stainless steel panel kit, SPKNS650 may be field installed to convert the unit to a stainless steel finish. -
Page 3: Location
They meet or exceed the standards of UL, NSF, and CSA. 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 4: For The Plumber
NS650 FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet Air Cooled Models: The HAND VALVE recommended water supply is clean, cold water. Use 3/8" O.D. copper FIELD tubing, connect to the 3/8" male flare SUPPLIED at the back of the cabinet. Install a... -
Page 5: For The Electrician
Voltage variation must remain within design limitations, even under starting conditions. All external wiring must conform to national, state, and local electrical codes. The use of a licensed electrician is required to perform the electrical installation. December, 1988 Page 5 NS650 POWER SUPPLY... -
Page 6: Final Check List
NS650 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 sight of the installed machine? Has the... -
Page 7: Start Up
9. Fill out the manufacturers registration card, and mail it to the Scotsman Factory. 10. Fill out the field quality audit form, and mail it to the Scotsman factory. December, 1988... -
Page 8: Component Description
Ice Level Sensor: An electronic "eye", it senses the presence of ice in the bottom of the ice discharge chute. Operates to turn the ice machine on and off automatically as the level of ice in the bin changes. Gear Motor: An oil filled, speed reduction gearbox, driving the auger. - Page 9 POTENTIAL CUT OUT SWITCH RELAY 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 10 NS650 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. Water Seal: A two part "face" seal, the top half...
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Page 11: Electrical Sequence
After it recloses the reset switch on the circuit board must be manually reset. The master switch is the manual control for the complete machine, but it is not a service disconnect. December, 1988 Page 11 NS650... -
Page 12: Operation
NS650 OPERATION: Water RESERVOIR STRAINER EVAPORATOR 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 13 After the evaporator, the refrigerant, now a low pressure vapor, goes through the suction line back to compressor, where the cycle is repeated. Refrigeration Schematic DISCHARGE LINE THERMOSTATIC EXPANSION VALVE COMPRESSOR December, 1988 Page 13 NS650 SUCTION LINE EVAPORATOR GEAR MOTOR...
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Page 14: Maintenance And Cleaning
NS650 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 15 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 buildup.
- Page 16 NS650 MAINTENANCE AND CLEANING: Auger 5. Clean the air cooled condenser: /////////////////////////////WARNING////////////////////////// Disconnect electrical power. ///////////////////////////////////////////////////////////////////////// Use a vacuum cleaner or coil cleaner if needed. Do NOT use a wire brush. Disconnect electrical power, and remove the filter. The filter may be cleaned or replaced.
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Page 17: Service Diagnosis
G. Check the water level in the reservoir. The machine will not run if there is not enough water in the reservoir. 1. Restore/adjust water level. See the next step. STATUS: NOTHING OPERATES December, 1988 Page 17 NS650... - Page 18 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 Testor Model NM1 into the circiut board.
- Page 19 B. Check the compressor 1. Check the compressor start relay. 2. Check the start capacitor. 3. Check the windings of the compressor for open windings or shorts to ground. Replace those items found defective. December, 1988 Page 19 NS650...
- Page 20 NS650 SERVICE DIAGNOSIS: Condition - Low Ice Production STATUS: EVERYTHING IS OPERATING A. Check the air cooled condenser for dirt. Clean as required. Check the head pressure on water cooled. Adjust as required. If the head pressure is very high: 1.
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Page 21: Removal And Replacement: Water Reservoir & Bin Controls
6. Reverse to reassemble, be certain that the bin controls are aligned so that the ice level sensors are visible (centered) through the grommets in the ice chute. December, 1988 Page 21 NS650 ICE LEVEL SENSORS: SLIDE UP TO REMOVE... -
Page 22: Slide Out Chassis
NS650 REMOVAL AND REPLACEMENT: Slide Out Chassis ////////////////////////////WARNING/////////////////////////// Disconnect Electrical Power from Machine Before Proceeding with Removal of Components. ////////////////////////////////////////////////////////////////////////// Moving the ice making chassis out may aid in gaining access to certain components for service. The top panel must be... -
Page 23: 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: Auger
Scrub the auger with ice machine cleaner and hot water. ///////////////////////////WARNING////////////////////////////// Ice machine cleaner is an acid. Handle it with extreme care, keep out of the reach of children. ////////////////////////////////////////////////////////////////////////// 2. -
Page 25: Water Seal
REPLACING THE 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. WATER SEAL 5. -
Page 26: Evaporator
NS650 REMOVAL AND REPLACEMENT: Evaporator ///////////////////////////////////////////////////////////////////////////WARNING////////////////////////////// ////////////////////////////////// Disconnect electrical power before begining removal procedures. ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// 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. -
Page 27: Gearmotor
REMOVAL AND REPLACEMENT: Evaporator EVAPORATOR WATER SEAL RETAINING RING DRIP PAN GASKET WATER SHED GEARMOTOR ASSEMBLY AUGER December, 1988 Page 27 NS650 SEAL(S) O-RING CAP SCREW BREAKER ICE SWEEP O-RING WATER SHED LIP SEAL BREAKER COVER O-RING AUGER STUD THRUST... - Page 28 NS650 REMOVAL AND REPLACEMENT: Gearmotor //////////////////////////////WARNING//////////////////////////// Disconnect Electrical Power Before Begining Removal Procedures. /////////////////////////////////////////////////////////////////////////// WATER SHED CENTRIFUGAL SWITCH SEAL AUGER DRIVE MOTOR COVER & OUTPUT GEAR ASSEMBLY ROTOR BEARING SEAL GEAR CASE December, 1988 Page 28...
- Page 29 The number of shims used must match the number on the gearcase cover. Do not use the old shims unless there is a shortage. Bench test the gearmotor, check for oil leaks, noise, and amp draw. December, 1988 Page 29 NS650...
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Page 30: Electronic Tester
NS650 Circuit Board Testing ///////////////////////////////////////////////////////////////////////WARNING////////////////////////////////////////////////////////////////// These procedures require the machine to be connected to the power supply. The voltages of the electronic circuit are very low, but HIGHER VOLTAGES ARE PRESENT IN THE UNIT. Do not touch anything but the tester while the unit is being checked out. Make all connections to the circuit board with the ELECTRICAL POWER OFF. - Page 31 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.