Table of Contents
Advertisement
Quick Links
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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
FOR THE ELECTRICIAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
START UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
ELECTRICAL SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
OPERATION: Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
OPERATION: Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
TECHNICAL CHARACTERISTICS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
MAINTENANCE AND CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
SERVICE DIAGNOSIS: Condition - No Ice Being Produced . . . . . . . . . . . . . . . . . . . . . . . . 18
REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls . . . . . . . . . . . . . . . . . . . . 22
REMOVAL AND REPLACEMENT: Bearing And Breaker . . . . . . . . . . . . . . . . . . . . . . . . . 23
REMOVAL AND REPLACEMENT: Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
REMOVAL AND REPLACEMENT: Water Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
REMOVAL AND REPLACEMENT: Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
REFRIGERATION SERVICE: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
CIRCUIT BOARD TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper.
This manual was printed on recycled paper.
Keep it for future reference.
The NSE650 is a complete ice system that
produces and stores nugget ice.
It features: front service for the condenser, control
box, and water reservoir; an electronic circuit for
monitoring ice and water level; a thermostatic
expansion valve; and HP62 as the refrigerant.
Table of Contents
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Note these symbols when they appear.
They mark a section that concerns potential hazards.
August 1993
Page 1
NSE650
Advertisement
Table of Contents
Subscribe to Our Youtube Channel
Related Manuals for Scotsman NSE650
Summary of Contents for Scotsman NSE650
-
Page 1: Table Of Contents
Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper. This manual was printed on recycled paper. Keep it for future reference. The NSE650 is a complete ice system that produces and stores nugget ice. It features: front service for the condenser, control box, and water reservoir;... -
Page 2: For The Installer
NSE650WE-1A same Note: Minimum Circuit Ampacity is used to determine wire size and type per national electric code. The normal finish for the ice machine is enamel-sandalwood. A stainless steel panel kit, SPKNS650 may be field installed to convert the Max. - Page 3 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
NSE650 FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet Air Cooled Models: The recommended HAND water supply is clean, cold water. Use VALVE 3/8" O.D. copper tubing, connect to the 3/8" male flare at the back of the cabinet. -
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. August 1993 Page 5 NSE650 POWER SUPPLY... -
Page 6: For The Installer
NSE650 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 voltage... -
Page 7: Start Up
9. Fill out the manufacturers registration card, and mail it to the Scotsman Factory. 10. Fill out the Customer Evaluation & Warranty Registration Form, and mail it to Scotsman. August 1993 Page 7 NSE650... -
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. -
Page 9: Component Description: Control Box
Transformer: Supplies low voltage to the circuit board. 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. - Page 10 NSE650 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 rotating with the auger, the bottom half stationary, the sealing action being where the two seal "faces"...
-
Page 11: Electrical Sequence
(through the relays on the circuit board). It must be manually reset at the control. The master switch is the manual control for the complete machine, but it is not a service disconnect. August 1993 Page 11 NSE650... -
Page 12: Operation: Water
NSE650 OPERATION: Water 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: Operation: Refrigeration
(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. SUCTION LINE DISCHARGE LINE THERMOSTATIC EXPANSION VALVE COMPRESSOR August 1993 Page 13 NSE650 EVAPORATOR GEAR MOTOR... -
Page 14: Technical Characteristics
NSE650 TECHNICAL CHARACTERISTICS Typical Low Side Pressure 32 - 34 PSIG, less in cooler ambients, greater in hot ambients Typical Discharge Pressure 200 - 250 PSIG air cooled 245 PSIG water cooled Typical Gearmotor Amp Draw 3.1 -3.6 Typical Compressor Amp Draw 8.5 to 9.1... -
Page 15: 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 16 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 17: Maintenance And Cleaning: Auger
Clean the auger and evaporator as required. DO NOT HONE THE EVAPORATOR. 8. Replace the water seal. 9. Reverse to reassemble. August 1993 Page 17 NSE650 ALLEN SCREWS BREAKER & BEARING & AUGER ASSEMBLY... -
Page 18: Service Diagnosis: Condition - No Ice Being Produced
NSE650 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 switches, ( high and low pressure): depress and release each switch. If the machine still does not start, check: the high and the low side pressures. - Page 19 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 20 NSE650 SERVICE DIAGNOSIS: Condition - No Ice Produced STATUS: GEARMOTOR OPERATES, COMPRESSOR DOES NOT A. Check the compressor relay. The relay is on the circuit board, if it does not supply power to the contactor coil, the compressor will not run.
- Page 21 The compressor should pull down to 25 inches of vacuum and hold there for three to five minutes. August 1993 Page 21 NSE650...
-
Page 22: Removal And Replacement: Water Reservoir & Bin Controls
NSE650 REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls WATER RESERVOIR 1. Shut off the water supply to the icemaker. 2. Remove front panel and reservoir cover. 3. Disconnect water inlet line from float valve. 4. To remove float only, push in the locking tab under the float valve, and pull float up and out of the reservoir. -
Page 23: 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 24: Removal And Replacement: Auger
Scrub the auger with ice machine cleaner and hot water. //////////////////////////////CAUTION////////////////////////////////// Ice machine cleaner is an acid. Handle it with extreme care, keep out of the reach of children. /////////////////////////////////////////////////////////////////////////////// 2. The water seal area. Because the auger has been removed, the water seal will have to be replaced. -
Page 25: 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 26: Removal And Replacement: Evaporator
NSE650 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. Recover the refrigerant from the ice maker. 2. Unsweat the refrigerant connections: a) At the thermostatic expansion valve outlet. - Page 27 NSE650 REMOVAL AND REPLACEMENT: Evaporator SEAL(S) O-RING EVAPORATOR BREAKER CAP SCREW ICE SWEEP WATER SEAL RETAINING RING O-RING DRIP PAN WATER SHED LIP SEAL GASKET BREAKER COVER WATER SHED O-RING GEARMOTOR ASSEMBLY AUGER STUD BEARING AUGER August 1993 Page 27...
-
Page 28: Removal And Replacement: Gearmotor
NSE650 REMOVAL AND REPLACEMENT: Gearmotor Electrical Shock Hazard. Electrical shock can cause personal injury. Disconnect electrical power before connecting tester. To Remove and Repair the Gearmotor Assembly: (Assuming that the procedures through removal of the water seal have been performed.) 1. -
Page 29: Refrigeration Service
Recover, reclaim or recycle refrigerant. The method chosen is up to the service company. Any refrigerant placed into a Scotsman ice machine must meet ARI spec 700-88. Reclaim programs are available through most refrigerant wholesalers. - Page 30 Scotsman also recommends that, at the time of initial start up, gauges not be used. If gauges must be used, don’t always check the high side pressure.
-
Page 31: August
If the Bin Empty light does not come ON, the circuit board should be replaced. LIGHT GOES SWITCH TO "BIN EMPTY" August 1993 Page 31 NSE650 LIGHT GOES LIGHT GOES OFF... - Page 32 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.
Need help?
Do you have a question about the NSE650 and is the answer not in the manual?
Questions and answers