Scotsman NU130 Manual Download

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NU130

Nugget Ice Machine

Summary of Contents for NU130

Page 1: ...NU130 Nugget Ice Machine ...

Page 2: ...NU130 Cabinet 15 inch wide cabinet Air cooled only Can be built in air in and out the front Service panel on side Stainless Steel Listed for outdoor use ...

Page 3: ...mpared to cube ice machines No spray pump No spray jets No hot gas valve No inlet water solenoid valve No Freeze or Harvest Cycles But it does have Continuous flow steady state system Auger Gear reducer Float valve ...

Page 4: ...In the Bin Ice Outlet Chute Bin Level Sensor Dataplate ...

Page 5: ...In the Bin Drain Condensate Drain Hose Scoop Holder ...

Page 6: ...Cabinet Air in and out the front Front Service Panel Kickplate Access to condenser ...

Page 7: ...Side Service Panel Provides access to bin drain drain pump when used fan motor and compressor ...

Page 8: ...Reverse Door Swing Remove top pin Lift door off bottom pin Remove hole plugs Switch hinges top to bottom side to side Install hole plugs Reattach door ...

Page 9: ...Installation Power 115 volt model with power cord Water OD copper tube on back compression fitting ships in attached bag Drain Gravity model Pump model or kit A39462 021 ...

Page 10: ...Electrical 115 volt 60 Hz power Unit must be on separate 15 amp circuit Outlet should be accessible or must use circuit breaker to shut off power during service No extension cords permitted ...

Page 11: ...er Supply Connection Connection on back Compression fitting shipped with unit 20 to 80 lb pressure Coil inlet tubing to this fitting when unit built in Back flow prevention is by air gap at the float valve ...

Page 12: ...must not trap water Vent and use rigid tubing outside of cabinet Route and slope to drain Maintain code air gap Drain Pump Hose pre connected Route to drain Maintain code air gaps Pump will activate when water backs up into inlet hose Conversion kit available ...

Page 13: ...Control Panel Status Light Check Water Light Time to Clean Indictor Light Clean Reset On Off ...

Page 14: ...Connect power Panel lights blink and go out Turn on water supply Push On Off button Ice making light switches ON Compressor Fan Motor and Auger Drive Motor operate In about 10 minutes ice will begin to fall into the bin ...

Page 15: ...Control Panel Ice Making Mode Green Ice Making Light Indicates ready to make ice Does not indicate operation bin full or empty ...

Page 16: ...Control Panel Check Water RedLight Indicates Lack of Water to Machine No ice will be made while light is on Restarts automatically when water restored ...

Page 17: ...Control Panel Time to Clean Yellow Light On after 6 months of power up time Indicates the machine needs to be cleaned Scale removed Condenser cleaned Unit sanitized ...

Page 18: ...Ice Making Components Evaporator Vertical stainless steel refrigerated tube Refrigeration coil wrapped on outside of tube 12 internal grooves Guide ice vertically ...

Page 19: ...Ice Making Components Auger Double spiral solid stainless steel auger Water Seal ...

Page 20: ...Ice Making Components Breaker Head Combination extruding head and bearing retainer ...

Page 21: ...Ice Making Components Gear Reducer Auger drive motor drives auger at 11 RPM CCW Auger engaged by fitting into hollow output shaft Square Drive ...

Page 22: ...Top of Gear Reducer Hollow shaft Water shed rotates with shaft Condensation relief slots Mounting shelf acts as drain pan No vent Water Shed ...

Page 23: ...sformer 12 volt secondary Controller Operates auger motor and compressor fan motor Connected to water and ice sensors Control Panel has lights and switches Water Level Sensor water conductivity Ice Level Sensor ultrasonic ...

Page 24: ...Control Box 12 v Transformer Bin Control Transducer Bin Control Connection 12 v Power Supply Connection High Voltage Connection Water Level Sensor Connection Control Panel Connection ...

Page 25: ...Sensor Ultrasonic System Emits high frequency sound Controller measures time to return signal Time tells controller the distance from sensor to ice More time lower ice level Either on or off not adjustable ...

Page 26: ...Water Reservoir Water Level Sensor Valve Lever Valve Float Bulb ...

Page 27: ...Refrigeration System R 134a 4 5 oz charge Cap tube metering device Steady state operation System pressures steady while making ice No access valves do not attach long hoses ...

Page 28: ...How It Works Refrigeration Schematic Condenser Compressor Capillary Tube Evaporator Gear Reducer Liquid Line Suction Line Heat Exchanger ...

Page 29: ...How it Works Water Schematic Water Level Water Inlet Outlet to Evaporator Drain Water Level Sensor ...

Page 30: ...Components Assembled Mounting Shelf ...

Page 31: ...Evaporator to Gear Reducer Adapter Gear Reducer Evaporator to Gear Reducer Fasteners Condensation Relief Slot ...

Page 32: ...Output Shaft Area Water Shed Output Shaft ...

Page 33: ...Auger Engagement Shown without adapter Adapter ...

Page 34: ...Normal Full Bin Ice Level ...

Page 35: ...Maintenance Air cooled condenser Remove service panel Remove kickplate Vacuum condenser ...

Page 36: ...ce Scale Removal Hard water scale will form on the ice making surfaces Reduces capacity Increases loads Increases noise Scale is commonly limestone Must be dissolved by food grade acid Ice machine scale remover ...

Page 37: ...Scale Removal Begin Shut machine off Remove ice Remove back panel of bin Two thumbscrews ...

Page 38: ...Scale Removal 2 Locate water reservoir Push tab and remove cover ...

Page 39: ...Scale Removal 3 Push Blue Float Valve On Off Lever Up Shuts water off ...

Page 40: ...Scale Removal 4 Pull drain plug and drain water system Return drain plug ...

Page 41: ...scale remover solution Need 16 ounces of solution Will need squirt bottle for built in situations Squirt bottle available premixed 19 0664 01 Or Mix Scotsman Clear 1 Scale remover with water Ratio 2 5 ounces to 32 ounces water ...

Page 42: ...Scale Removal 6 Add scale remover solution to water reservoir until it is full About 8 ounces ...

Page 43: ...Scale Removal 7 Push and Hold BOTH On Off and Clean buttons for 5 seconds ...

Page 44: ...es for 10 minutes Compressor turns on ice is made for 40 minutes Must be present to add scale remover solution while unit is making ice After all 16 ounces of solution is used up push the Float Valve On Off lever Down to switch the water back on ...

Page 45: ...sh After machine shuts off Shut water off Drain water system Re plug drain Switch water back on Rinse bin drain Wipe up loose scale from gear reducer Return bin back panel Push in at bottom to snap in Switch unit back on ...

Page 46: ...Top Bearing Check Check for Gap 015 Pin Gage Pin must not slide between auger shaft and inside of bearing ...

Page 47: ...Diagnostics Simple to Complex No Ice no response at control panel Check power to transformer primary ...

Page 48: ...No Power to Transformer Power Disconnected Pump model open safety pressure switch Water in bin pump or drain failure No water in bin switch failure ...

Page 49: ...mer OK Check secondary for 12 volts AC If OK check control panel Unplug ribbon cable at J6 and check switches Dot is pin 1 Pin 2 3 On Off Switch Pin 4 3 Clean Reset Switch About 10 ohms when activating a button and Open when not pressing a button Pin 1 ...

Page 50: ...No Ice no control panel response Control Panel OK Check power to controller 12 volts to connection If OK switch power on and off if still no response replace controller ...

Page 51: ...No Ice no water light is ON Check water supply Check float valve Check water level sensor ...

Page 52: ...No Ice Water Check Is float down and no water If yes and water is not flowing in valve is plugged or not working If no is shut off lever up If float is up and shut off lever is down valve is not working ...

Page 53: ...No Ice Water Check Check Water Light is On but the reservoir has water Water is too clean Must be 10 microSiemens cm or more of conductivity Water sensor wire disconnected Controller cannot read sensor ...

Page 54: ...No Ice No Water Light is ON Water Sensor Check Unplug sensor at J7 Short center and right pins together Light should go out ...

Page 55: ...aking Light is ON Two minute delay after power reset Or in restart window 60 second restart attempt time Wait or reset controller to check Press Off On to stop and again to start If does not start check bin control ...

Page 56: ...No Ice Ice Making Light is ON Bin Control Check Locate J2 bin stat Short pins together Unit should start If yes replace bin control sensor If no replace controller ...

Page 57: ...but Auger motor is operating Check for voltage Bk W at controller controller s compressor relay may have failed Fan blade not turning check for free action of fan blade check motor windings Compressor off may have overheated if fan not turning Check starting components and compressor windings ...

Page 58: ... ice sweep is turning condenser is clean Possible refrigerant leak Possible compressor valve failure Add temporary access valve to process tube of compressor to check suction pressure MUST use short hose 6 or charge will be affected Suction pressure should be about 8 10 PSIG ...

Page 59: ...rmal is 5 to 6 amps Lights will blink once every 2 seconds 4 minutes to restart Auger Motor Low or No Amp Draw Lights will blink twice every 2 seconds 20 minutes to restart motor cool down time Controller Failure Lights will blink once every 10 seconds ...

Page 60: ... Top panel access is required for many components including Gear reducer auger breaker water seal reservoir controller transformer bin control Shut off and Drain water from evaporator prior to service of any part of it ...

Page 61: ...Removal and Replacement Ice making components Begin with the ice sweep Rotate CCW to remove Ice Sweep ...

Page 62: ...Removal and Replacement Remove back panel of bin Lift ice chute up and off evaporator Ice Chute ...

Page 63: ...Removal and Replacement Remove 4 allen head bolts and lift breaker off evaporator ...

Page 64: ...Removal and Replacement Breaker Bearing Bearing is non metallic and does not require any lubrication Bearing can be replaced by driving it out and pushing another in Bearing Breaker w out bearing ...

Page 65: ...Removal and Replacement Lift auger out of evaporator Disconnect drain hose from evaporator ...

Page 66: ...Removing Stuck Auger 5 16 18 Hex cap screw Flat Washer Shim with hex nuts Shim breaker tighten cap screw to lift auger Spacer ...

Page 67: ...oval and Replacement Separate Evaporator from Gear Reducer Disconnect electrical harness from auger motor Remove 4 phillips screws holding gear reducer mounting plate to shelf Suggest using 16 Screwdriver ...

Page 68: ...Removal and Replacement CAREFULLY lift gear reducer evaporator up Rest on back wall Remove 4 allen head screws holding evaporator to adapter ...

Page 69: ...Removal and Replacement Separate Evaporator from Gear Reducer Remove water seal from evaporator Water Seal ...

Page 70: ...Removal and Replacement Water Seal Stationary Half Rotating Half Mating Sealing Surfaces ...

Page 71: ...Removal and Replacement Water Seal Rotating Half on Auger Remove seal ring Clean auger Add sealant to auger Install new seal Rubber side up Wet rubber Push onto auger Do NOT touch mating surfaces ...

Page 72: ...Removal and Replacement Water Seal Stationary Half Wet outside edge Push into evaporator tube Stop when flush with end of tube Adapter will push seal to proper depth as shown ...

Page 73: ...Removal and Replacement IF replacing gear reducer be sure not to overtighten mounting bolts ...

Page 74: ...e evaporator tube onto gear reducer Adapter will position water seal to correct depth Secure with the original 4 allen head screws Reattach assembly to shelf Install auger into evaporator tube Reattach breaker to top of evaporator ...

Page 75: ... Remove side service panel front service panel and kickplate Remove back panel Remove screws under side service panel Remove 2 screws at back bottom corners Loosen 2 screws at front bottom corners Tip cabinet forward Support with 11 inch prop ...

Page 76: ...Compressor Support Prop ...

Page 77: ...Summary NU130 is a continuous flow ice machine Ice form is chewable Nugget 15 inch cabinet Air cooled Pump or Gravity Drain R 134a ...

Page 78: ......

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