NU130 Installation and Use

Table of Contents

• Product Description
• Cabinet Dimensions
• Location Recommendations
• Familiarization
• Door Swing
• Plumbing - Pump Model
• Plumbing: Gravity Drain Model
• Electrical and Start Up
• Use
• Maintenance
• How to remove scale from the ice making system

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.

Product Description:

This ice machine is designed to be used indoors, in a controlled environment or outdoors within certain limits.

The NU130 is made up of two major systems: the ice making system and the ice storage system. The ice making system is a continuous flow type ice machine; it makes ice when the ice level becomes low and stops when it is full.

The ice storage system is an insulated chest with a drain at the bottom for melting ice. It is not refrigerated, ensuring that the bin contains fresh ice.

Installation Information

Dimensions:

The cabinet is fourteen and seven eighths inches wide by thirty three and three eighths to thirty four and three eighths inches high.

Utility and Operational Requirements

• The NU130 must be connected to a potable water supply.
• The water supply must have a conductivity of at least 10 microSiemens/cm.
• Minimum water pressure: 20 psi
• Maximum water pressure: 80 psi
• Minimum water temperature: 40 degrees F.
• Maximum water temperature: 90 degrees F.

It is designed to operate in a wide range of air temperatures:

• Minimum air temperature: 50 degrees F.
• Maximum air temperature: 100 degrees F.

Although the machine will function within the listed ranges, it works best at water temperatures between 50 and 60°F and air temperatures between 60 and 80°F.

Note: Ice making capacity goes down as the environmental temperatures go up, and will be severely reduced at temperatures over 90°F.

Operating a unit outside of the limits can cause problems that are not covered by the warranty and, if extreme, cause damage to the unit.

Water Quality

The water to the machine must be potable, or fit for human consumption. Beyond that, water supplies vary in the degree of mineral content. As this ice machine makes ice, all the water that flows into the machine is changed into ice. That includes any minerals that might be in the water. However, during ice making some minerals will stick to the ice making components. The higher the mineral content, the more mineral build up will occur. Water filters are a partial help, as they will remove the suspended solids, but water treatment is needed for the dissolved solids, which are part of the water and cannot be filtered out.

RO Water

This machine can be supplied with Reverse Osmosis water, but the water conductivity must be no less than 10 microSiemens/cm. A reverse osmosis system should include post treatment or blending to satisfy the R.O. water's potential aggressiveness.

Deionized water is not recommended and could damage the machine.

Because water softeners exchange one mineral for another, softened water may not improve water conditions when used with ice machines.

Electrical power

The unit must be on its own 115 volt, 60 Hz, 15 amp circuit. It is equipped with a power cord and can be plugged into a nearby outlet. Extension cords are not allowed by most codes. Follow all applicable codes.

Warranty Information

Warranty information is supplied separately from this manual. Refer to it for coverage. In general, the warranty covers defects in materials or workmanship and does not cover corrections of installation errors or maintenance.

Cabinet Dimensions

Diagram description: The diagram shows a multi-view technical drawing of the NU130 ice machine, illustrating its external dimensions and key connection points. Front view shows air intake and outlet grills. Side views detail width, depth, handle placement, water inlet (1/4" O.D. copper compression fitting provided), drain access (3/8" I.D. for pump model, 5/8" I.D. for gravity model), leg adjustment points, and power cord location. Top view indicates a floor drain access hole. Overall dimensions are approximately 14 7/8" wide, 29 1/2" deep, and 33 3/8" to 34 3/8" high. It also shows the location of the left side service access panel.

Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance. 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.

Scotsman reserves the right to make design changes and/or improvements at any time. Specifications and designs are subject to change without notice.

Location Recommendations:

The machine can be built into a cabinet. It is an air cooled refrigeration system and so air flows in and out of it through the grill at the bottom front. The grill must not be blocked by any covering door or other obstruction.

Diagram description: An illustration shows the front of the ice machine with airflow indicated by arrows. "Warm Air Out" is shown exiting the bottom grill, and "Air Intake" is shown entering the same grill.

There are two models, one is a gravity drain type and it must have a building drain connection below the level of the drain tube at the back of the cabinet; the other is a pump drain model which can force drain water up a maximum of 10 feet, allowing it to be located where a gravity drain isn't available.

Drain Conversion:

A gravity drain model can be converted to a drain pump model by installing a drain pump kit. The drain pump kit consists of a drain pump, wiring harness and associated tubing. The part number is A39462-021.

Installation Notes

Built In Situations:

If a finished floor is to be installed in the area after the ice machine has been built in, shims the expected thickness of the floor should be installed under the unit to keep the machine level with the planned floor level.

Note: The water connection is at the back and adds a few inches to the cabinet depth. Minimum clearance is 0 in. at the top, 2 in. at the rear and 1/8 in. at each side.

Installations on a slab:

Use a pump model and pump the water to the point of drainage. Pump models will pump 1 story (10 feet) high.

Installations over a crawl space or basement:

Either gravity drain or pump model units may be used, if there is not enough room behind the machine for a drain/waste receptacle, the drain will have to be below the floor.

Note: When installed in a corner, the door swing may be limited due to handle contact with the wall or cabinet face.

All models require a water supply. Water supplies vary in the degree of mineral content. High mineral content water will require more frequent maintenance. Water filtration may improve the taste of the ice as well as cut down on some of the mineral build up.

Kickplate Extension:

In some situations the leg levelers will be extended enough to become visible. A kit to extend the kickplate over the legs is KKPF.

Cabinet Stability:

In some free standing installations it may be prudent to add a bracket that secures the back of the cabinet to a wall. That kit number is KATB.

Familiarization

The control panel is visible when the door is opened. It has three indicator lights and two switches.

Diagram description: The control panel features three indicator lights and two switches. The lights are labeled "Ice Making", "Check Water", and "Time to Clean". The switches are labeled "On/Off" and "Clean Reset".

The model and serial number plate is located on the bottom of the control panel box. The Ice Level Sensor is also visible from that angle, as is the Ice Chute.

Diagram description: A view showing the location of the serial number plate and the ice level control sensor below the control panel.

The Scoop Holder is located on the right side of the ice storage bin. The normal ice level is about level with the scoop holder.

Diagram description: An illustration of the ice storage bin interior showing the scoop holder.

Door Swing

The door can be attached to open with hinges on the left or right. Retain all screws for re-use.

To change:

1. Remove top hinge pin from hinge.
2. Tilt top of door away from cabinet and lift door off bottom hinge.
3. Remove two screws and top hinge.
4. Remove plugs or screws from lower cabinet bracket.
5. Move door hole plugs to opposite side.
6. Remove original bottom hinge. Both hinges are off.
7. Remove hinge pin from bottom hinge.
8. Attach top hinge to lower cabinet bracket using original screws.
9. Install a hinge pin in bottom hinge on unit.
10. Remove two plugs or screws from upper cabinet bracket.
11. Attach original bottom hinge to upper cabinet bracket using the original screws.
12. Place the door on bottom hinge, tip up to slide under top hinge.
13. Insert hinge pin into top hinge and door.
14. Tighten hinge pin.
15. Replace screws or plugs into holes left by hinges.
16. Check action and swing of door.
17. Return kickplate and front service panel to their original positions and attach to the cabinet using the original screws.

Diagram description: Images illustrate the steps for removing and reattaching hinges, including hinge pins, cabinet brackets, and door plugs.

Plumbing - Pump Model

Drains

There are two types of ice machine models, one that drains by gravity and one that has an internal drain pump.

Drain Pump Model drain installation

1. Locate the coil of 3/8" ID plastic drain tubing secured to the back of the unit.
2. Route the plastic drain tube from the back of the unit to the drain connection point.

The drain connection point can be as high as 10 feet above the ice machine. The drain pump includes a check valve to prevent re-pumping water in the drain hose.

IMPORTANT NOTE: ❗ Often an air gap is required by local codes between the ice maker drain tube and the drain receptacle.

Diagram description: Shows the rear of the unit with a connection point labeled "Connect Water Supply Here" and "Pump Drain Discharge Tubing".

Water Supply

The recommended water supply tubing is 1/4 inch OD copper. Stainless steel flex or reinforced PCV tube may also be used. Install an easily accessible shut-off valve between the supply and the unit. This shut-off valve should not be installed behind the unit.

The water connection is at the back of the cabinet. Connect using a compression fitting, one is supplied tied to the water inlet tube. When built in: Coil enough tubing behind the machine so it can be pushed into the cavity without kinking the tubing.

Plumbing: Gravity Drain Model

Caution: ⚠️ Restrictions in the drain system to the machine will cause water to back up into the ice storage bin and melt the ice. Gravity drain tubing must be vented, have no kinks and slope to the building drain. Air gaps are typically required by local code.

1. Place the ice machine in front of the installation opening. Adjust leveling legs to the approximate height.
2. Remove the upper back panel if needed for access to the drain fitting.

Note: ℹ️ If you are connecting a gravity drain model and the drain opening has been located in the floor under the base pan according to the pre install specifications, follow steps 3 through 5 to drain the unit through the base. If not, proceed to step 6b.

3. Remove the clamp and barbed elbow and take off the plastic cover in the base pan below the drain hose.
4. Connect a straight 5/8" barbed connector to the drain hose, securing with the clamp removed in step 3.
5. Cut an 8" piece of 5/8" ID X 7/8" OD tygon (clear plastic) tubing. Slide one end of the tube onto the outlet of the barbed connector and secure with a clamp. Leave the other end of the tube lying on the floor of the base pan until the unit is positioned over the floor drain.
6. Route the drain tube. Either a) Insert the drain tube through the base pan into the floor drain or b) Route the drain tube through the hole in the lower back panel and connect to barbed elbow and secure with a clamp.
7. Reinstall the upper back panel.

Diagram description: Shows the drain tubing inside the cabinet and the water supply connection point at the rear of the unit.

Water Supply

The recommended water supply tubing is 1/4 inch OD copper. Stainless steel flex or reinforced PCV tube may also be used. Install an easily accessible shut-off valve between the supply and the unit. This shut-off valve should not be installed behind the unit.

The water connection is at the back of the cabinet. Connect using a compression fitting, one is supplied tied to the water inlet tube. When built in: Coil enough tubing behind the machine so it can be pushed into the cavity without kinking the tubing.

Electrical and Start Up

The ice machine is supplied with a power cord. Do not remove the grounding pin from the cord's plug. Do not use extension cords. Follow all codes. Connect the machine to its own 115 volt, 15 amp circuit.

Installation check list:

1. Has the unit been connected to the proper water supply?
2. Has the water supply been checked for leaks?
3. Has the unit been connected to a drain?
4. Has the drain been tested for flow and leaks?
5. Has the unit been connected to the proper electrical supply?
6. Has the unit been leveled?
7. Have all packing materials been removed from the machine?
8. Has the door covering been installed?

1. If the electrical outlet for the ice maker is behind the unit, plug in the unit.
2. Position the unit in the installation opening.
3. Turn on the water supply. Make sure that the ice maker is plugged in and the power is on.
4. Slide unit into installation opening, paying careful attention to water supply and drain connections. Do not kink!
5. Pour a couple of quarts of water into the ice storage bin; on drain pump equipped machines the drain pump should start and water should pump out. Check for leaks.
6. Replace the service access panel.
7. Level the unit as needed.

Initial Start Up

1. Turn on the water supply and check for leaks.
2. Switch on the electrical power.
3. Push and release the On/Off switch to start the machine. The Ice Making light next to the On/Off switch will glow Green.

Warm air will flow out of the left front grill.

It will take about 10 minutes for the ice machine to begin dropping nugget ice into the storage bin. It is normal for that ice to melt and ice will continue to melt, but at a slower rate. It will take about 6 - 7 hours to fill up the ice storage bin. 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. When ice melts or is used, and the ice level drops below a preset distance the control turns the ice making system back on. It makes ice until the preset level is reached. Placing your hand in the unit to remove ice does not affect the ice level.

Use

No special instructions are needed for use. Just take as much ice as you need, the machine will replace it. A scoop is provided, and it can be stored in the machine using the loop of tubing on the right side as a holder.

The machine can be shut off anytime by just pushing and releasing the On/Off button.

What shouldn't be done?

Never keep anything in the ice storage bin that is not ice. Objects like wine or beer bottles are not only unsanitary, but the labels can slip off and plug up the drain.

Never allow the machine to operate without regular cleaning. The machine will last longer if it is kept clean. Regular cleaning should happen at least once per year, and preferably twice. Some water conditions will dictate even more frequent cleaning of the ice making section, and some carpets or pets will dictate more frequent cleaning of the condenser.

Note: ℹ️ The Time to Clean light will switch ON after 6 months of use. It will remain ON until the ice making system is cleaned using the process on page 14.

Noise:

The ice machine is designed for quiet operation, but will make some noise during the ice making cycle.

Ice Making

During ice making, nugget ice will drop into the bin at an irregular rate; sometimes there will be little ice falling while at other times a group of nuggets will fall. Some water drops may also come out with the ice. Both conditions are normal.

Diagram description: The control panel shows buttons for "Ice Making", "Check Water", "Time to Clean", and "Clean Reset". Indicator lights are described: Glows Green when unit is switched On; Glows Yellow when it's time to clean the machine; Glows Red when there is no water supplied to the machine. The machine will NOT make ice when this light is on. It will restart and the light will go out when the water supply is restored.

Maintenance

Scotsman strongly recommends regular maintenance of this ice machine. During normal operation mineral scale that is in the water supply will gradually build up on the ice making surfaces. That build up can cause excessive loading of the ice making system, which can cause premature failure. Regular removal of the mineral scale will lengthen the product's life.

Suggested maintenance schedule: every 6 months.

Type of maintenance: Scale removal, water seal check, water reservoir check, bin drain check, air cooled condenser cleaning and storage bin sanitation.

Condenser cleaning

The condenser is like the radiator on a car; it has fins and tubes that can become clogged with dirt and lint. To clean:

1. Remove the kickplate and front service panel.
2. Locate the condenser surface.
3. Vacuum the surface, removing all dust and lint.

Caution: ⚠️ Do not dent the fins.

4. Return the kickplate and front service panel to their original positions. Fasten them to the cabinet using the original screws.

Winterizing

1. Clean the ice making system per the instructions in the Maintenance section.
2. Open the door and push and release the On/Off switch to turn the machine off.
3. Turn off the water supply.
4. Remove the back wall of the ice storage bin.
5. Remove drain plug and drain the water reservoir, return plug to its original position.
6. Drain pump models should have about 1/2 gallon of RV antifreeze (propylene glycol) poured into the ice storage bin drain.

Note: ℹ️ Automotive antifreeze must NOT be used.

7. Switch off and unplug the machine.

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. A squirt bottle will make adding the scale remover much easier when the unit is built in. If not built in, remove the top panel for reservoir access.

Recommended tools: Rubber gloves, squirt bottle & scale remover. Pre-Mixed 16 oz squirt bottle of scale remover is part number 19-0664-01.

1. Scoop out and discard all of the ice.
2. Press and release the On/Off button.

Diagram description: Shows the float valve on/off lever and the reservoir cover release tab.

3. Open door and locate screws at upper back wall of bin. Remove the two screws.
4. Remove the back wall of the bin by lowering it down past the scoop holder, feel free to rotate the scoop holder loop down to make more room.
5. Push tab on front edge of reservoir cover and remove the cover. Note: Adjacent wires are low voltage and are not hazardous.

Diagram description: Shows the control panel buttons and lights.

Diagram description: Shows the location of screws at the back of the bin.

Diagram description: Shows how to lift the reservoir cover to remove it.

6. Locate blue float valve on/off lever. Move lever up about half way to shut water off.
7. Locate drain plug and pull the drain plug out to drain the reservoir and evaporator. When draining is complete, return the plug to its original position.

Diagram description: Shows the drain plug location.

WARNING ⚠️

Ice machine scale remover contains acids. Acids can cause burns. If concentrated cleaner comes in contact with skin, flush with water. If swallowed, do NOT induce vomiting. Give large amounts of water or milk. Call Physician immediately. Keep out of the reach of children.

Note: ℹ️ Take care not to spill any scale remover on any nearby surface. Immediately wipe any spill with baking soda and water.

8. Obtain pre-mixed Scotsman Clear 1 Scale 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.
9. Fill the 16 oz squirt bottle with the diluted scale remover.
10. Fill the reservoir with the scale remover solution using squirt bottle or other container. That will be about 8 ounces or half a squirt bottle.

Diagram description: Shows filling the reservoir using a squirt bottle.

11. Press and HOLD both the Clean-Reset and On/Off buttons for 5 seconds. The Time to Clean light will blink on and off.
12. The auger motor alone will be operating for 10 minutes, after that the compressor will start and in about 5-8 minutes the machine will start to make ice. The Time to Clean light will now glow steady until the clean cycle is complete.

Caution: ⚠️ Keep fingers away from moving parts.

1. After ice making starts, continuously add scale remover solution to the reservoir to keep it about half full.
2. When all 16 oz of the solution is used, move the float valve lever down to the On position.

13a: Optional - move float lever up to Off, add locally approved sanitizer* to water system, then repeat step 13. Move the float lever down to On.

14. Return the reservoir cover to its original position.

15. Return the upper back wall of the bin to its original position and secure it with the original screws. Push in at bottom to snap it into place.

16. Pour a gallon of lukewarm (95°F. – 115°F.) water into the bin to flush out the drain and melt all ice that was made during the cleaning process. Be sure all ice is melted.

17. Clean the bin liner of mineral scale by using any left over scale remover solution to scrub the scale off of the liner. If none is left over, mix a solution of 2.5 ounces of Clear 1 Scale Remover and 1 quart of water.

18. Rinse the liner with hot water.

19. Sanitize the ice chute, ice sweep, breaker and bin interior using a locally approved saniziter.*

20. Push and release the On/Off button to restart ice making.

The ice scoop should be washed regularly, wash it just like any other food container.

* A potential sanitizer may be made by mixing 1 ounce of liquid household bleach to 2 gallons of lukewarm (95°F. – 115°F) water.

Other Maintenance

While cleaning the system with scale remover, check for water leaks at the bottom of the evaporator. If any are found, call for service.

Note: ℹ️ It is normal for some lime scale to form on the gear reducer cover. Wipe up any loose scale.

After 40 minutes the ice machine and all the control panel lights will shut off.

13. Pull the drain plug again to drain the system, then replace it.

Check the top bearing.

The top bearing is non-metallic and requires no lubrication. However, it should be checked for wear occasionally. The top panel must be removed to access the bearing.

Service Manual Overview

This section provides detailed information for the service and repair of the NU130 ice machine. It covers a wide range of topics, including:

• Components: An overview of the major systems such as refrigeration, control, auger drive, water, and storage systems. Includes a schematic of the refrigeration system.
• Evaporator and Auger: Detailed explanation and diagram of the evaporator and auger assembly.
• Control System: Explanation of the control pad, its lights and switches, and how the control system operates the machine, including safeties and error conditions.
• Water System: Description of how water enters the machine, the float valve and reservoir function, and water quality considerations.
• Storage: Description of the ice storage bin.
• Performance and Technical Specs: Detailed specifications including refrigerant, compressor, electrical components, and control timers.
• Electrical Sequence: Explanation of the machine's startup and shutdown procedures, and safety shutdown conditions (lack of water, auger motor overload/low current, controller failure).
• Service Diagnosis: Tables outlining common problems (e.g., No ice, Not keeping up, Water Leak) with likely causes and probable solutions.
• Component Diagnostics: Details on diagnosing issues with specific components like the Membrane Switch, Pump Switch, Compressor, and Ice Level Sensor.
• Ice Capacity: Information on how ice making capacity is determined and a chart comparing capacity at different temperatures.
• Removal and Replacement: General guidelines for component access and specific procedures for replacing major parts like the Evaporator, Water Seal, Gear Reducer, Auger, Drain Pump, Compressor, and Bin/Cabinet.
• Gearbox Access & Removal, Water Seal Replacement, Gear Reducer Replacement, Auger Replacement, Ice Breaker Replacement: Detailed step-by-step instructions with diagrams for servicing these specific mechanical components.
• Evaporator Replacement, Water Reservoir, Controller, Ice Level Sensor Replacement: Detailed steps for replacing these key electrical and functional components.
• Drain Pump (if equipped) and Fan Blade or Motor: Procedures for removing and replacing these parts.
• Compressor Replacement: Comprehensive steps for replacing the compressor, including refrigerant handling.
• Bin and Cabinet, Auger Motor or Motor Capacitor: Procedures for accessing and replacing these structural and motor components.

The service section contains numerous detailed diagrams and step-by-step instructions for technicians.