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Scotsman CU0415 Technical Training Manual
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Scotsman CU0415 Technical Training Manual

Essential ice
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Technical Training
CU0415, CU0715, CU0920
Essential Ice

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Summary of Contents for Scotsman CU0415

  • Page 1 Technical Training CU0415, CU0715, CU0920 Essential Ice...
  • Page 2 Presentation Topics • Introduction • Installation • Operation • Cleaning • Diagnostics • Service...
  • Page 3 Introduction • Three basic models – Air cooled, 15 inch wide, 58 lb – CU0415 – Air cooled, 15 inch wide, 80 lb – CU0715 – Air cooled, 20 inch wide, 100 lb – CU0920 • Three electrical configurations – 1 or 115 60 Hz –...
  • Page 4 Ice Type • Medium cube / full dice • Inverted grid evaporator • Dedicated spray jet per cube cell • 45 cubes per cycle – Cubes harvest as a unit...
  • Page 5 Evaporator • Nickel Plated Copper • Mounted inverted above spray platform...
  • Page 6 Refrigeration System • R-134a • Cap tube • Air cooled only – Air in the front and out the front – Fan pressure control switch • No access valves • Common evaporator on all three...
  • Page 7 Water System • Batch type – single fill per cycle – Inlet water solenoid valve • .275 GPM • On during harvest – Standpipe in reservoir • Water pump – Off during harvest • Spray platform • Same parts on all models (non electrical)
  • Page 8 Control System • Temperature initiated, timed cycle – Thermistor on suction line • For freeze and harvest – Controller – Bin thermostat • Opens on temperature fall • Capillary tube in sensing tube in bin – Thermistor in pump hose •...

  • Page 9: Installation

    Installation • Unit supplied with 6 inch legs – 8 inch available – 02-4731-02, set of 4 • Can be floor mounted – Has bumpers on base to keep from damaging floor – Kit available to make sealing to floor easier •...
  • Page 10 Floor Mounting Kits • Kits provide plastic glides and trim strips to attach to base in place of legs 31 ½ • Fills in the half inch of inches space at the bottom • Allow sealing to the floor • Will fit under 34 inch ADA countertop height ½...
  • Page 12 Installation • Minimum clearances when built in – 1/8 inch at sides – ¼ inch at top – 4 inch minimum behind machine – Will make ice at minimum but performance better with more clearance • Electrical – Supplied with power cord •...
  • Page 13 Installation • Water and Drain – all models – Drain is ¾ FPT • Must be vented...
  • Page 14 Installation • Water Connection - 115/60 – ¼ inch OD plastic tubing routed out the back – No fittings are supplied...
  • Page 15 Installation • Water connection - 208-230/60 or 230/50 – Includes water supply hose – Fitting supplied loose in bin – Attaches to 3/8 male flare on back of unit Fitting...
  • Page 16 Component Location Water Pump Water Inlet Curtain Evaporator Cube Deflector Hot Gas Valve Compressor Inlet Water Solenoid Valve Air Inlet Fan Motor Controller and Blade...
  • Page 17 Pre-Start Inspection • Check freezing compartment • Remove any shipping blocks and other materials • Check – Cube deflector – snapped down? – Spray platform – in place? – Curtain – hanging free?
  • Page 18 Inspect Freezing Compartment Shown with cube deflector removed • Move curtain and check • Pull curtain down to its spray platform under normal position. cube deflector. – Jets point straight up.
  • Page 19 Initial Start Up • Turn water supply on – MUST be on first • Remove front panel • Connect electrical power • Switch master switch to ON...
  • Page 20 Start Up • Bin thermostat must be closed to supply power to controller • Unit will start in Harvest mode – Water flows in – Compressor on – Hot gas valve open • Two minutes later freeze cycle begins – Pump and fan ON –...
  • Page 21 Controller Information Ice bridge and harvest time setting indicators Freeze Mode Light Timer Light...
  • Page 23 Cycle Times – Free Standing • CU0415 Note: Cycle times will be – 25 minutes at 70/50 longer when built into a – 38 minutes at 90/70 cabinet • CU0715 – 17 minutes at 70/50 – 25 minutes at 90/70 •...
  • Page 24 Time to initially fill bin • 70/60 conditions to first shut off – CU0415 – 13 hours – CU0715 – 8 hours – CU0920 – 9 hours • Commonly restarts for more run hours after first shut off...
  • Page 25 Ice Bridge 3/16...
  • Page 26 Adjustments Increase or Decrease Bridge Thickness Increase or Decrease Harvest Time...
  • Page 27 Correct Settings • Bridge Thickness – Must release ice as a unit, bridge will be about 3/16 inch and there will be a hollow part in the cube • Harvest Time – Must continue long enough to release the ice, plus 10 to 20 seconds more.

  • Page 28: Factory Settings

    Factory Settings Ice Bridge Ice Bridge Harvest Harvest Lights on Lights Lights on Lights STEADY BLINKING STEADY BLINKING CU0415 CU0715 CU0920...
  • Page 29 Ice Bridge and Harvest Time Settings • 10 settings on 5 lights each • 1 blinking is minimum, 5 steady is maximum – Steady light = 2 – Blinking light = 1 – Examples • 3 lights on steady = 6 •...
  • Page 30 Internal Timings • Freeze timer (timer light on) – 7 minutes, starts when evaporator thermistor temperature falls to preset point • Harvest timer (timer light on) – 20 seconds, starts when evaporator thermistor temperature warms to preset point • Minimum harvest time –...
  • Page 31 How It Works – Starting / Restarting • Closed bin thermostat and Master Switch to the ON position power compressor and controller – 2 minute harvest cycle (adds water), then freeze begins – Fan off until discharge pressure builds to 150 PSIG –...
  • Page 32 How It Works • Harvest cycle – Pump off – Fan off – Hot gas valve on – Inlet water solenoid valve on – Cycle continues until suction line temperature warms to preset point, triggers timer in controller to end the cycle •...
  • Page 33 Cleaning and Maintenance...
  • Page 34 – Manual harvest, releases any ice on the evaporator • Switch unit off, discard all ice. • Drain reservoir by pulling the drain plug and then putting it back. • Mix 5 oz of Scotsman Clear 1 scale remover and 2 ½ quarts of warm water.
  • Page 35 Reservoir Drain Plug...
  • Page 36 Scale Removal • Pour solution into the reservoir • Move master switch to the Wash position – Pump will be on • Operate for 10 minutes or more, then move switch to OFF. • Drain reservoir. • Remove spray platform, inspect all jets, clear any that are restricted...
  • Page 37 Spray Platform Inlet engages clip in reservoir, pull forward to remove...
  • Page 38 Spray Platform Assembly...
  • Page 39 Sanitize • Use locally approved sanitizer – Mix one packet of Stera Sheen Green Label with 2 gallons of warm water – Fill empty reservoir with sanitizer – Move master switch to Wash for 2 minutes – Drain reservoir into bin –...
  • Page 40 Maintenance and Cleaning • Clean air cooled condenser – Vacuum and brush dirt from fins...
  • Page 41 Service Diagnosis • No ice – No water, check water filters and supply to unit – No water, check inlet water solenoid valve – Nothing operating, check power to unit – Nothing operating, check bin thermostat – Nothing operating, check master switch position –...
  • Page 42 Service Diagnosis • No ice, compressor and fan are on, pump not spraying water – Check for water in reservoir • Check drain plug for leaks – Check for pump hose disconnected – Check pump motor voltage. If none and blue Freeze mode light is ON, wait 30 seconds.
  • Page 43 Service Diagnosis • No ice, pump spraying water, fan motor and compressor are off – Master switch in Wash position • No ice, pump spraying water, compressor on, fan motor not turning – Fan motor open, no power or stuck –...
  • Page 44 Service Diagnosis • No ice, everything operating, poor spray to evaporator – Partial water fill in reservoir – Spray platform leaking or jets restricted • Check / Clean spray platform • No ice, everything operating, good spray to evaporator – Too much water, check inlet water solenoid valve for leak thru...

  • Page 45: Service Diagnosis

    Service Diagnosis • No ice, everything operating, water in reservoir is hotter than supply water – Hot gas valve not shutting off / leaks thru • No ice, everything operating – No refrigeration, check suction line temperature, should begin to chill during freeze mode •...
  • Page 46 Service Diagnosis • No ice in bin, evaporator has ice on it, does not release in time – Very cold water supply, increase harvest time – Damaged evaporator, check plating • No ice, compressor is off – Compressor relay failure, check current relay –...
  • Page 47 Service Diagnosis • Makes ice, but ice is cloudy or not completely formed – Spray jets restricted, clean machine – Lack of rinse water due to hot room temperature • Adjust harvest time longer to drain more water • Makes ice but they are blocks or shells –...
  • Page 48 Evaporator Thermistor • Typically triggers timer at about 3.3 degrees F. – 76,790 ohms • If thermistor is out of range, open or shorted controller operates on preset freeze and harvest times – Signal of evaporator thermistor failure is all green lights on controller blink together –...
  • Page 49 Service Diagnosis • Makes ice but does not fill the bin, cycle times are correct – Bin thermostat opens and shuts machine off before bin is full, check room temperature • Adjust thermostat if room is below 60 degrees F. •...
  • Page 50 Service Diagnosis • Makes ice but does not fill the bin, cycle times are too long – Air cooled condenser is dirty, clean it – Too much water, inlet water valve leaks thru – Air flow restricted • Placed in closet or other very small room? –...
  • Page 51 Replacement of Selected Components • Curtain – Remove top panel – Remove evaporator cover – Pull curtain up and out of its slot...
  • Page 52 Replacement of Selected Components • Cube Deflector – Lift up at reservoir edge, twist slightly and pull out – Snaps onto reservoir edge...
  • Page 53 Replacement of Selected Components • Water Pump – Disconnect power – Remove top panel – Remove pump cover – Disconnect wires and pump hose – Rotate pump CW and pull up and...
  • Page 54 Replacement of Selected Components • Bin Thermostat – Disconnect power – Remove front, top and left side panels – Pull capillary tube out of sensing tube – Pull capillary tube into bottom of unit – Disconnect wires at thermostat and remove thermostat from unit...
  • Page 55 Replacement of Selected Components • Inlet Water Solenoid Valve – Shut water & power off – Remove • top, front, back and right side panels • Utility panel • screws holding valve bracket to utility panel • screws holding valve to bracket –...
  • Page 56 Cabinet Removal • Remove front, back, side and top panels Remove • Remove door • Drain water, disconnect power and water • Pull thermostat cap tube • Remove evaporator cover...
  • Page 57 Cabinet Removal • Remove screws holding evaporator to its frame. • Lift evaporator up and out of the way – Support as needed...
  • Page 58 Cabinet Removal • Disconnect wires from water pump • Remove thermistor from pump hose • Disconnect bin drain hose • Disconnect water supply hose from evaporator platen...
  • Page 59 Cabinet Removal • Lift bin with reservoir Deck Cover off the deck • Remove deck cover...
  • Page 60 Cabinet Removed...
  • Page 61 Questions?

This manual is also suitable for:

Cu0715Cu0920