CU0920X - Ice Maker Scotsman - Free user manual and instructions

USER MANUAL CU0920X Scotsman

Installation and User’s Manual for Cube Ice Machines with Storage Models CU0415X, CU0715X CU0415X, CU0715X andand CU0920X CU0920XUser Manual for Models CU0415X, CU0715X and CU0920X January 2025 Important Safety Information. Make sure to read through fully to avoid severe injury or death. This ice machine contains FLAMMABLE

Flame can cause burns or property damage

Water TemperatureWater Temperature There are also limits to how hot or cold the water supply can be:

• Minimum water temperature: 40

• Maximum water temperature: 100

Water PressureWater Pressure There are limits to the water pressure supplied to the unit:

• Maximum pressure. static: 80 psi or 5.5 bar

• Minimum pressure, dynamic: 15 psi or 1 bar Water supply must be potable by the localities denition. VoltageVoltage There are limits to the voltage supply to the unit. Voltages vary by model:

• Minimum voltage: 104V

• Maximum voltage: 126V DrainDrain A drain will be needed for melted ice and rinse water. Warranty: The warranty statement for this product is provided separately from this manual. Refer to it for applicable coverage. In general, warranty covers defects in material or workmanship. It does not cover maintenance, corrections to installations, or situations when the machine is operated in circumstances that exceed the limitations printed above. This is a commercial model. if installed in a residence, some commercial service companies may not be able to service it on site. The manufacturer has designed and produced this machine with the nest in materials. The manufacturer assumes no liability for units that have been altered in any way. Alterations or part substitutions will void the warranty. Specications and designs are subject to change without notice. Fill out the Warranty Registration Card shipped with the unit and mail it in, or scan the QR code to register the machine on the Scotsman warranty website: Options: There are two oor mounting kits available:

• KUFM15: for 15” models

• KUFM20: for 20” model Scotsman Ice machines are designed and manufactured with the highest regard for safety and performance. They meet or exceed UL60335-2-89.January 2025 Page 3 User Manual for Models CU0415X, CU0715X and CU0920X Pre-Installation This appliance is intended to be used in commercial applications including:

• Hotels Dimensions and Electrical: Location: The unit can be built into a cabinet, as airow circulates in and out the front vent. The front of the machine must not be blocked. Certain maintenance or repair procedures will require removal of the top, back and side panels, so plan ahead for service and maintenance needs. Spacing: No additional spacing is required at the top or sides. However, suggested minimum side clearance for installation is 1/8” or 3 mm and suggested minimum top clearance is 1/4” or 7 mm. Allow 4” (100 mm) minimum space at the back for the utility connections. Do not block louvers at the front of the cabinet. Unpacking and Setup Remove all shipping and packing materials that may be in the ice storage bin. The unit can be installed with or without legs. The cabinet is equipped with small bumpers on the base to allow placement without legs. An optional oor mounting kit is also available to ll the gap between the machine and oor if not using legs. If using legs, carefully tip the machine and install the legs by screwing them into the leg sockets in the bottom of the machine. For reference, the thread size is 5/8” – 11. If the machine has been tipped onto its side or back allow 1 hour before starting the unit for the oil in the refrigeration system to return to the compressor. Place the machine in its intended location and level it front to back and left to right. If using legs, adjust their feet in and out to level the cabinet. If legs are not used the bottom edges of the cabinet must be sealed to the oor. If built into a cabinet, the adjacent cabinet walls will provide the means for containment. There are no means for attachment to the cabinet. Be sure to remove the plastic covering the exterior panels. If left on, the plastic will be much harder to remove later. Model Electrical (volts/Hz/Phase Width (in / cm) Depth (in/cm) Height (w/o legs) (in/cm) Total Load Amps Max Fuse Size

Air IN Air OUTUser Manual for Models CU0415X, CU0715X and CU0920X January 2025 Page 4 Cabinet Layout, CU0415X and CU0715XJanuary 2025 Page 5 User Manual for Models CU0415X, CU0715X and CU0920X Cabinet Layout, CU0920XUser Manual for Models CU0415X, CU0715X and CU0920X January 2025 Page 6 Component Location Cube Deector Bin Thermostat Sensing Point Condenser Fins Bin Thermostat Adjustment Thermostat Controller Control Area Condenser Fan Drain PlugJanuary 2025 Page 7 User Manual for Models CU0415X, CU0715X and CU0920X Connect the Power This is a cord-connected unit that must be connected to its own dedicated power supply. Check the dataplate on the back of the machine for required voltage, ampacity, and fuse size. Use only fuses or HACR-rated circuit breakers as specied. Power Cord:Power Cord: This machine is equipped with a cord and 5-15P plug. Please use the following guidelines when providing power to the machine:

• Make sure the machine is installed on a dedicated power supply. Using a shared circuit may cause malfunctions or damage.

• Never exceed the specied maximum fuse size.

• Follow all local codes, ensuring proper grounding, and do not use extension cords or attempt to bypass the ground prong on the electrical plug. The use of a ground fault circuit interrupter (GFCI) or arc-fault circuit interrupter (ARCI) can lead to nuisance trips and is not recommended for use on most appliances including our equipment. If local codes or other specications require the use of ground fault circuit interrupters, a properly rated HACR GFCI or ARCI circuit breaker should be used. An outlet type GFCI or ARCI is not recommended for ice machines and other refrigeration equipment due to more frequent nuisance trips of the GFCI or ARCI. Always check with your local electrical inspector about the specic code requirements in your area for GFCI or ARCI breakers and receptacles. Cube Deector Spray Platform Push curtain back above the Spray Platform and check that it is in this position. The Cube Deector must be positioned as shown. It snaps onto the front edge of the reservoir. After checking spray platform, pull curtain down to hang freely. This is its normal position. CurtainUser Manual for Models CU0415X, CU0715X and CU0920X January 2025 Page 8 Connect the Water Supply Plumbing information:

• The water supply connection is at the back panel. It is a 5’ (1.5 meter) 1/4” (6.35 mm) OD plastic tube.

• A hand actuated valve within site of the machine is required to isolate the unit when it’s being serviced.

• The machine has a built-in back ow preventer (an air gap between the end of the water inlet hose and the top of the reservoir water). No additional back ow preventer is needed.

• Water ow rate into machine is .25 GPM / .94 LPM. For units that are built into a cabinet: Include a loop or coil of tubing between the water supply and the connection on the ice machine. When the machine is pushed back into the cabinet, the tubing will coil and not kink. Connection Information:Connection Information:

WARNING: Connect to potable water supply only.WARNING: Connect to potable water supply only.

Note: Open the hand water valve to ush water Open the hand water valve to ush water through the connection point before connecting to the through the connection point before connecting to the ice machine.ice machine.

1. Cut cable ties securing hose and power cord to

2. Connect to cold, potable water using the

necessary adapters for the 1/4” OD plastic tube.

• If using compression ttings they require a ferrule or sleeve and insert.

• A female 3/8” compression adapter x 1/4” OD compression allows connection to a typical 3/8” OD compression angle valve.

• Another connection method is by quick connect ttings. Note: Do not use a piercing-type saddle valve to connect to the building’s water supply. Valves of that type restrict water ow and clog easily. Connect the Drain The drain connection is at the back panel. The tting size is 3/4” FPT.

1. Connect rigid tubing to this tting and vent it at the

machine, use an 8” or 200 mm vertical tube for the vent.

2. Slope drain tubing down from the ice machine to

the building drain and the slope must be at least 1/4” per foot or 20 mm per meter.

3. Insulate the drain tubing to reduce condensation

and is recommended for environments that have high humidity. Due to the potential for leaks, condensate pumps are not recommended. Installation Check List

• Has the machine been installed indoors in an environment suitable for it?

• Have all of the shipping items and packaging been removed?

• Has the plastic covering the exterior panels been removed?

• Is the cube deector in the correct position?

• Is the clear plastic curtain hanging down and free to move?

• Has the water supply been connected and conrmed to not leak?

• Has a properly sized and sloped drain tube been attached?

• Has the correct voltage power supply been connected? Drain Fitting, 3/4 FPT Potable Water Inlet TubeJanuary 2025 Page 9 User Manual for Models CU0415X, CU0715X and CU0920X Harvest Cycle Time Adjustment After ice has formed in the inverted mold, it must be released through a harvest cycle so it can be deposited in the storage bin section. The harvest cycle must be long enough for the ice to release. While the harvest cycle length is self adjusting, it can also be manually adjusted if needed. The proper length of the harvest cycle is long enough for the ice to fall into the bin, with about 10 seconds extra harvest time (pump and fan are o󰀨) before the freeze cycle restarts. If the harvest time is too short to release the ice, the time may be increased by pushing the + sign on the harvest time adjustment section of the control panel. Operate the machine for another cycle to conrm that the adjustment was correct. Note that too much harvest time will slightly decrease ice making capacity. Adjustment Indicator Lights Each push and release of the + or - button will change the ve lights that glow or blink indicating a change in ice size or harvest time. Pushing + one time changes a blinking light to steady on type. If the lights are on steady a single push of + will add one more light to the right and it will blink. There are 10 settings. All 5 lights on steady is the maximum setting and one blinking light is the minimum. Ice Too Thin Ice Too Thick Ice Just Right Bridge Thickness Ice Thickness Diagram Ice Bridge Thickness Adjustment Refer to the Ice Thickness Diagram for proper ice size. Adjust by pushing the + sign or – sign on the ice bridge adjustment section of the control panel. Changing bridge thickness should be a one-time adjustment as the machine will automatically maintain that ice thickness. Control Panel and Adjustments

Freeze Mode and Timer Light The freeze mode light is on when unit is in a freeze cycle. The timer on light is on when the trigger point temperature is reached in freeze or harvest cycles.User Manual for Models CU0415X, CU0715X and CU0920X January 2025 Page 10 Initial Start Up

1. Remove the front panel by removing the two

screws holding it to the cabinet and pulling the panel down and o󰀨 the machine.

2. Turn on the water supply, correct any leaks.

Note: Water supply MUST be turned on rst to allow water to enter the machine properly.

3. Locate the ON/OFF/WASH master switch.

4. Move the switch to the ON position.

5. Ice bridge thickness and harvest time indicator

lights will switch on. They will not change unless the cube size or harvest times are manually adjusted. The timer light will also be on.

6. The unit begins to ll the reservoir with water.

Two streams of water can be seen behind the curtain. The compressor and hot gas valve will be energized, but the fan motor and pump will be o󰀨. After several minutes, the water will have lled the reservoir but will continue to ll and excess water will drain from the machine. This is normal and helps the machine from forming excessive mineral scale.

7. After 2 minutes the water and hot gas valves will

close and the pump and fan motors will start. A blue light in the control panel will glow indicating the beginning of the freeze cycle.

8. Warm air will begin to blow out the left front of the

machine and water will spray up at the inverted ice making mold. It is normal for a small amount of water to drip from the ice making area. When the water temperature reaches a pre- set point, the water pump will stop for about 30 seconds then resume. Freezing then continues for many minutes until the temperature of the refrigeration system drops to a set point, indicated by a yellow light glowing on the control panel. In colder rooms the fan motor may turn on and o󰀨. After the yellow light switches on, the freeze cycle continues for seven more minutes. At that time the unit changes to the ice release or harvest cycle. During the ice harvest, the hot gas valve and inlet water valve are open, while the pump and fan motors will stop. The blue and yellow lights will go out. Water will rell the reservoir.

9. Within a minute or so, the ice formed in the mold

will fall down and slide into the ice storage bin. All of the ice formed will fall at once and the next freeze cycle will begin a few seconds later. The timer light may switch on at the end of the harvest cycle.

10. Check the thickness of the ice connecting the

cubes to each other, that connection is known as a bridge and it should be about 1/8” or 3 to 4 mm thick. It is preset from the factory and should be satisfactory. Adjustments: If the ice bridge is too big or too small, the thickness may be adjusted. Note: The bridge thickness adjustment is used to obtain the CORRECT size, not to adjust to individual preferences. Do NOT make the ice bridge too thick or too thin, as either will reduce ice making capacity. Do NOT attempt to adjust the machine to release individual cubes. There is only ONE correct size.

11. Ice making will continue until the ice level reaches

the metal tube in the storage bin. When ice contacts that tube, the machine will stop making ice. This can occur in any part of any cycle.

12. Removing ice from the ice storage bin will restart

the ice making process.

13. Check for and correct any water leaks from the

unit or drain system.

14. Return the front panel to its normal position and

secure it to the cabinet with the original screws. Typical Cycle Times (minutes) Note: First cycle after any restart will be longer than listed here. 70/50

C.) CU0415X 28-30 34-37 CU0715X 16-18 23-26 CU0920X 14-16 17-19 The time to ll a warm storage bin from empty varies by cabinet temperature and cycle time, but will take about 10-12 hours.January 2025 Page 11 User Manual for Models CU0415X, CU0715X and CU0920X Use and Operational Notes To use, simply lift the door by its bottom edge and slide it up and into the top of the machine. Use the scoop to remove ice, then close the door when nished. The machine will make the most ice if it has plenty of room to breathe. This is an air cooled product and it must be able to take in room temperature air and discharge air heated by the ice making process. Blockage of vents or exposure to excessive heat will reduce the ice making and storage capacity of the machine. The storage bin is insulated but not refrigerated, so ice will melt during use. That is normal and assures that fresh ice is available in the bin. The fan will make some noise during operation. However, rattles and other vibrations are not normal and should be attended to. When the air temperature surrounding the machine is cold, the fan might cycle on and o󰀨 during the freeze mode. If the machine is in a space colder than the minimums listed, it will not switch on to make ice. Minor adjustments may be made to compensate for local conditions by rotating the adjustment screw which is visible above the control area. If in a cold room, CW rotation changes the control to COLDER to ll the bin higher. If installed at an altitude greater than 2000 ft or 610 meters above sea level, the bin thermostat may need internal adjustment. The adjustment screw is behind the front of the control, accessed through a hole for it. Bin Thermostat Altitude Adjustment Table: Altitude (ft) Altitude (meters) Degree of adjustment 2000 600 31 CW 3000 900 52 CW 4000 1200 72 CW 5000 1500 92 CW 6000 1800 111 CW 7000 2100 128 CW No Step Do not stand on the machine. Severe damage can occur. This appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, or lack of experience and knowledge, unless they have been given supervision or instruction concerning use of the appliance by a person responsible for their safety. Children should be supervised to ensure that they do not play with the appliance. Typical Full BinUser Manual for Models CU0415X, CU0715X and CU0920X January 2025 Page 12 Maintenance Regularly vacuum the right side of the air cooled condenser with a brush to remove all loose dust and dirt. Be careful not to damage the ns. Cubed ice machines of this type make ice that is more pure than the water supplied to it. Since the ice has fewer impurities, the water that remains in the reservoir has more. The water system dilutes that concentration, but eventually it does build up and needs to be removed. This process is called scale removal and should be performed at least every 6 months. Scale Removal Process Materials needed:

• Food grade, nickel safe scale remover for ice machines, also known as ice machine cleaner.

• Rubber or plastic gloves

1. Remove front panel.

2. Move master switch to OFF, wait a minute and

3. When the freeze cycle begins (blue light on),

switch the machine to OFF.

4. Remove and discard the ice.

5. Drain reservoir by pulling drain plug and then

return drain plug to its original position.

6. Mix a solution of 5 oz or 150 ml of Scotsman Clear

1 Scale Remover and 2.5 quarts or 2.4 liters of clean, warm (95

7. Pour the solution into the reservoir by carefully

adding it at the reservoir’s front lip.

8. Move the master switch to the WASH position.

10. Move the master switch to the OFF position.

11. Drain the reservoir by removing drain plug and

draining the solution into the bin. Return the drain plug to its normal position.

12. Remove spray platform by removing cube chute

and lifting spray platform up and o󰀨 its connection. If needed, open platform and conrm all jets are open. Rinse out any debris, reclose and return it and the cube chute to the unit. Be sure gasket is positioned correctly - narrow side faces up toward jets.

C) water into the reservoir by adding it at the reservoirs’ front lip.

14. Switch the master switch to WASH for 1 minute,

then switch it to OFF.

15. Repeat step 11. Go to the next process to sanitize

the machine. Sanitization Process

1. Create a solution of sanitizer by missing 1 gallon

(4 liters) of clean, warm potable water (105° – 115° F) with 1.6 oz of locally approved sanitizer.

2. Pour about half of the sanitizer mix into the

3. Remove the cube chute and spray platforms and

wash them with the sanitizer, then return them to the ice machine.

4. Move the master switch to the WASH position.

5. Circulate the sanitizer for 2 minutes.

6. Move the master switch to OFF.

7. Drain the reservoir into the storage bin by

removing the drain plug. Return the drain plug to its normal position. Ice machine scale remover contains acids. Acids can cause burns. If concentrated cleaner comes in contact with skin, ush 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.January 2025 Page 13 User Manual for Models CU0415X, CU0715X and CU0920X

8. Wipe down all interior surfaces of the ice machine

storage bin, reservoir surface and inside of the door with the remaining sanitizer solution.

9. Pour any excess sanitizer down the ice machine

C) water into the reservoir by adding it at the reservoirs’ front lip.

11. Move the master switch to the Wash position for 1

minute, then switch it to OFF.

12. Drain the reservoir by removing the drain plug and

draining the solution into the bin. Return the drain plug to its normal position.

13. Move switch to the ON position. The machine will

resume normal ice making.

14. Return the front panel to its original position and

secure it with the original screws. Cleaning the Condenser

1. Remove the front panel.

2. Switch the machine to OFF.

3. Vacuum the surface of the condenser ns,

carefully brush o󰀨 any loose dirt. If grease is embedded, use coil cleaner to wash it out.

4. Switch the machine to ICE.

5. Return the front panel to its original position.User Manual for Models CU0415X, CU0715X and CU0920X

January 2025 Page 14 Before Calling for Service No ice – Check water supply No ice – Check power supply. Remove front panel, if there are no lights on the control panel either the bin thermostat is open, keeping the machine o󰀨, OR there is no power to the controller. No ice – Check temperature of cabinet. If too cold, the machine will not operate. Slow production – Check condenser for dirt, clean condenser. Slow production – Check temperature of cabinet, if the room is hot or air ow restricted, production will be slow. Ice is poorly formed. Check spray. If some spray jets are restricted, ice will be poorly formed. Clean water system to correct. Note: In areas where the water supply has a high mineral content, the spray jets may need frequent clearing. Increasing the harvest time will ush more water and help to reduce the frequency of cleaning. To increase harvest time:

1. Conrm unit is in ice making mode. If the bin is

full and the unit is o󰀨 the controller cannot be adjusted.

2. Remove the front louvered panel.

3. Increase the time by pushing the + sign on the

harvest time adjustment section of the control panel. Each push increases the time.

4. Return the front louvered panel to its normal

position.January 2025 Page 15 User Manual for Models CU0415X, CU0715X and CU0920X Only qualied technicians familiar with R290 refrig- erant should decommission a machine, as special tools and containers are required for the removal, transportation, and disposal of this highly ammable substance.

• Before attempting the procedure:

• Ensure that all protective gear is present and used throughout the procedure.

• Make sure recovery equipment and containers are available and ready for use. All containers used for recovery must be rated for R290 refrigerant and must be labeled as such.

• Weigh any refrigerant prior to reclaiming.

• Maintain safety through standard operating proce- dures as outlined on page 20 of this document. Be sure to follow local, state, and federal guidelines for proper disposal.

• Do not ll containers more than 80% and do not exceed the pressure limits of the container. Make sure the machine to be decommissioned is in satisfactory working order and that the electrical components of the machine are properly sealed to prevent ignition.

• Recovered refrigerant should not be charged into another refrigerating system or mixed in another container.

• Make sure to safely transport the refrigerant in line with standard operating procedures.

• All recovered refrigerant must be returned to re- frigerant supplier for proper disposal.