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NU130
Installation and Use
Introduction
This manual includes information for the
installation, operation and maintenance of the
NU130 residential ice machine.
The NU130 was developed to offer fans of
Scotsman's Nugget Ice form the ability to have that
ice in a smaller unit. Previously Nugget Ice was
only available in commercial establishments, where
it developed a strong following because of the
chewable nature of the ice. This machine makes
authentic Nugget ice, using the same process as
the larger commercial machines.
Product Description: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2
Cabinet Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3
Location Recommendations: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4
Familiarization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5
Door Swing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6
Plumbing - Pump Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7
Plumbing: Gravity Drain Model . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 8
Electrical and Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9
Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11
How to remove scale from the ice making system. . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12
Outdoor Use Notice:
Keep from freezing. Severe damage will occur to the unit if left in or operated in temperatures beyond
the limits listed in this manual. That damage is NOT covered by warranty.
Keep dry. Do not locate in low lying areas where puddles will accumulate.
Provide Shade: Heat gain from the sun will reduce the unit's ability to make and store ice, and
ultraviolet radiation from the sun can potentially damage the unit's plastic components.
Water Supply: Avoid a long run of hose or tubing exposed to the sun. Plastic water supply tubing
should be rated for potable water and include UV protection. Copper tubing is recommended.
Back Flow Prevention: The unit includes back flow prevention, no additional check valve is required.
Drainage: Do Not drain into swimming pool or onto grounds.
Table of Contents
July 2011
Page 1
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Summary of Contents for Scotsman NU130
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Page 1: Table Of Contents
This manual includes information for the installation, operation and maintenance of the NU130 residential ice machine. The NU130 was developed to offer fans of Scotsman’s Nugget Ice form the ability to have that ice in a smaller unit. Previously Nugget Ice was... -
Page 2: Product Description
The water to the machine must be potable, or fit for human consumption. Beyond that, water supplies The NU130 is made up of two major systems: the vary in the degree of mineral content. As this ice ice making system and the ice storage system. The... -
Page 3: Cabinet Dimensions
They meet or exceed the standards of agencies like ETL. 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 parts and/or other components not specifically approved by Scotsman. -
Page 4: Location Recommendations
NU130 Installation and Use Location Recommendations: The machine can be built into a cabinet. It is an air Drain Conversion: A gravity drain model can be cooled refrigeration system and so air flows in and converted to a drain pump model by installing a out of it through the grill at the bottom front. -
Page 5: Familiarization
NU130 Installation and Use Familiarization The control panel is visible when the door is opened. It has three indicator lights and two switches. Clean Check Time to Reset Making Water Clean Control Panel The model and serial number plate is located on the bottom of the control panel box. -
Page 6: Door Swing
NU130 Installation and Use Door Swing The door can be attached to open with hinges on 6. Remove original bottom hinge. Both hinges are the left or right. Retain all screws for re-use. off. To change: 1. Remove top hinge pin from hinge. -
Page 7: Plumbing - Pump Model
NU130 Installation and Use Plumbing - Pump Model Drains Water Supply There are two types of ice machine models, one The recommended water supply tubing is ¼ inch that drains by gravity and one that has an internal OD copper. Stainless steel flex or reinforced PCV drain pump. -
Page 8: Plumbing: Gravity Drain Model
NU130 Installation and Use Plumbing: Gravity Drain Model Caution: Restrictions in the drain system to the clamp. Leave the other end of the tube lying on the machine will cause water to back up into the ice floor of the base pan until the unit is positioned storage bin and melt the ice. -
Page 9: Electrical And Start Up
The bin holds about 20 lb of ice when full. Ice level control The ice level control for the NU130 is an ultrasonic sensor, located above the ice storage area. It is automatic and there is no adjustment to make. -
Page 10: Use
NU130 Installation and Use No special instructions are needed for use. Just Noise: take as much ice as you need, the machine will replace it. A scoop is provided, and it can be stored The ice machine is designed for quiet operation,... -
Page 11: Maintenance
NU130 Installation and Use Maintenance Scotsman strongly recommends regular 4. Return the kickplate and front service panel to their original positions. Fasten them to the cabinet maintenance of this ice machine. During normal using the original screws. operation mineral scale that is in the water supply will gradually build up on the ice making surfaces. -
Page 12: How To Remove Scale From The Ice Making System
NU130 Installation and Use How to remove scale from the ice making system. Cleaning this machine involves adding a solution of scale remover and water to the ice machine and continuing to add it as it makes ice. The scale remover must be diluted to the correct ratio. - Page 13 NU130 Installation and Use 6. Locate blue float valve on/off lever. Move lever 8. Obtain pre-mixed Scotsman Clear 1 Scale up about half way to shut water off. remover solution (with squirt bottle) or mix a solution of Clear 1 with water: 2.5 ounces of Clear 1 with 1 quart (32 oz) of warm water.
- Page 14 NU130 Installation and Use 11. Press and HOLD both the Clean-Reset and 13a: Optional - move float lever up to Off, add On/Off buttons for 5 seconds. The Time to Clean locally approved sanitizer* to water system, then light will blink on and off.
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Page 15: Nu130 Service
NU130 Gearbox Access & Removal ........ -
Page 16: Components
The ice sweep, rotating with the auger, The NU130 is a continuous flow ice machine. moves the ice to the ice chute where it falls by When the control system senses that the storage gravity into the storage bin. -
Page 17: Evaporator And Auger
NU130 Service Evaporator and Auger Bearing Ice Outlet Foam Insulation Auger Heat Exchange Tube Coil Rotating Half of Water Seal Water Inlet Stationary Half of Water Seal Cut Away View July 2011 Page 3... -
Page 18: Control System
NU130 Service Control System The control system operates the machine. The The control pad has two switches and three lights. controller operates on 12 volts AC, supplied by the The left switch button is On/Off. The right switch transformer. It uses an ultrasonic ice sensor to button is Clean/Reset. -
Page 19: Water System
NU130 Service Water System The auger is driven at about 11 RPM by the gear slightly and water will flow into the reservoir reducer. The gear reducer is a sealed component through the partially open float valve. It will flow in and does not require lubrication, as it contains a continually as ice is made. -
Page 20: Storage
NU130 Service Storage The ice storage system is made up of a plastic lined ice storage bin, covered by an insulated top panel and an insulated swing open door with gasket. The ice storage bin is foamed in place, so the side panels are not removable. -
Page 21: Performance And Technical Specs
NU130 Service Performance and Technical Specs Overall: Light Blink Information • • Refrigerant: 4.5 oz R-134a All blink once and repeat every 2 seconds: • Auger motor overload Compressor: Hermetic, 1390 BTUH • • All blink twice and repeat every 2 seconds: Condenser: Forced draft •... -
Page 22: Electrical Sequence
NU130 Service Electrical Sequence Upon power being supplied, all the lights will blink the water it is in contact with. If there is no water once and the control system will immediately check present, there will be no electrical continuity and for water in the reservoir. -
Page 23: Service Diagnosis
NU130 Service Service Diagnosis Problem Likely Cause Probable Solution No power Plug unit into power supply Unit switched off Push and release on/off button Restore water supply, check sensor. If RO water is too pure, unit cannot operate. No water, water diagnostic light is on... -
Page 24: Service Diagnosis
NU130 Service Service Diagnosis Problem Likely Cause Probable Solution With power on and Ice Making light on, check connector, if secure jump the two middle pins at J2 (bin stat) on the Ice level sensor failure controller together. Unit should start. If it does, replace the sensor, if not, replace the controller. -
Page 25: Component Diagnostics
NU130 Service Component Diagnostics Membrane Switch Pump Switch - Pump model only Unplug and check connector pins (left side is pin The pump switch activates the pump based on 1), read about 10 ohms when activating the button, pressure to it from water inside the drain hose to and OL when not pressing the button: Pin 2-3 the pump inlet. -
Page 26: Ice Capacity
All ice making capacities listed by Scotsman are for clean, new machines. The ice storage bin is not refrigerated; it is an insulated ice chest, so there is meltage. -
Page 27: Removal And Replacement
Lubricants and Sealants Food grade lubricant is useful in repair of this model. Scotsman part number 19-0569-01. Food grade sealant is needed in repair of this model. Scotsman part number 19-0529-01... -
Page 28: Nu130 Gearbox Access & Removal
NU130 Service NU130 Gearbox Access & Removal Lift and remove ice chute Shut off water supply Remove drain plug inside bin compartment Disconnect power supply or unplug unit Hazard of Electrical Shock. Disconnect Electrical Power Before Servicing. Uninstall unit and pull out as needed for top and back access. - Page 29 NU130 Service Remove breaker & set aside Carefully lift and rest gearbox & bracket against back of compartment lip Pull auger from freezer by lifting straight up (be careful as auger has sharp edges!) Note: If auger does not lift freely, see Auger Removal Procedure.
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Page 30: Water Seal Replacement
NU130 Service Water Seal Replacement Go through the prior steps to remove the gear Lubricate or moisten the outer edge of the new reducer. seal and push it into the bottom of the evaporator tube until flush with the bottom of Remove rotating half of water seal from bottom the tube. - Page 31 NU130 Service 13 Slide breaker onto auger shaft. Secure with the Remove 4 allen head screws holding breaker original four allen head bolts. to evaporator. 14 Reverse the balance of the steps to complete Lift breaker off and replace with a new part.
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Page 32: Evaporator Replacement
NU130 Service Evaporator Replacement Go through all steps to remove the gear Disconnect electrical power. reducer. Remove control box cover Add temporary refrigeration system access valves to the discharge and suction sides of the Unplug all wires. refrigeration system . -
Page 33: Drain Pump (If Equipped)
NU130 Service Drain Pump (if equipped) Shut off water supply Fan Blade or Motor Remove all ice and/or any standing water. If equipped with drain pump follow all steps to remove pump. Disconnect power or unplug unit Unplug fan motor connection. -
Page 34: Compressor Replacement
NU130 Service Compressor replacement. Note: If built in the unit will need to be pulled out. Note: Placing it over the leg leveler and next to the strut works the best. Shut off water supply 13 Add temporary refrigeration system access... -
Page 35: Bin And Cabinet
NU130 Service Bin and Cabinet The bin and cabinet can be separated from the 17 Lift bin and cabinet off chassis. base. Either the ice making evaporator system must be lifted out and securely suspended or the Auger Motor or Motor Capacitor refrigeration system opened and the connections to the evaporator unbrazed.
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