Scotsman Industries — Technical Presentation
70 slides from Scotsman Industries's technical presentation
Slide 1: CME1056 Modular Cuber Technical Training
CME1056 Modular Cuber Technical Training
Slide 2: CME1056
CME1056 • Product Information • Installation Details • Operation • Maintenance • Service Diagnosis
Slide 3: CME1056 Modular Cuber
CME1056 Modular Cuber • 30” wide by 24” deep platform • Replaces CME1002 and CME1000 – Air Cooled - Louvered Side Panels – Water Cooled - No louvers – Remote Air Cooled - No louvers • Remote uses ERC311 condenser
Slide 4: CME1056 Modular Cuber
CME1056 Modular Cuber • CM3 Technology – AutoIQ Controller – Adaptive Harvest – No seasonal adjustments – Automatic restarts
Slide 5: Installation
Installation • The Recipe for Ice has 3 ingredients: – Electricity – Water – Refrigeration • When properly mixed together by the ice machine, the bin fills with ice. If one or more of the ingredients is shorted, performance will suffer!
Slide 6: Installation
Installation • Fits all Scotsman 30” wide bins • Fits competitive 30” wide bins – Baffle needed • Fits Scotsman Bins – BH800 with Bin Top KBT23 – BH900 with Bin Top KBT22 • Fits many 30” wide Ice & Beverage Dispensers
Slide 7: Installation: Water
Installation: Water • Supply cold, potable 3/8” male flare water. water inlet • Connect rigid tubing to drain fitting and VENT it. – 12” standpipe 3/4” FPT drain fitting, do not overheat!
Slide 8: Installation: Electricity
Installation: Electricity • Electrical junction box in back panel – External 4 x 4 extension box can be added to Remotes or – Use standard internal junction box • Supply proper power – Check the nameplate!
Slide 9: Installation: Refrigeration
Installation: Refrigeration • Air Cooled – Need cool air supply • Baffle included for in- corner installations • Reduces hot air re- circulation Attach baffle to back corner.
Slide 10: Installation: Remote
Installation: Remote hd= hd horizontal distance rd= rise distance x 1.7 rd dd= drop distance x 6.6 hd+rd+dd=total Total <= 150 Total Drop dd Cannot Exceed 15 feet
Slide 11: Installation: Remote
Installation: Remote • Best Practices: – Condenser ABOVE ice machine – Shortest distance possible between condenser and ice machine – Control excess tubing
Slide 12: Installation: Remote
Installation: Remote • CME1056R uses ERC311 remote condenser – Headmaster in the condenser – RCKCME6GX headmaster kit must be added to McDonald’s installations when using their MAC condenser
Slide 13: Installations: Water Cooled
Installations: Water Cooled Condenser Water Inlet Condenser Drain
Slide 14: Installation: Bin Thermostat
Installation: Bin Thermostat • Route Thermostat Bulb through routing hole Thermostat Routing Hole Bulb
Slide 15: Installation: Thermostat
Installation: Thermostat Bottom View Bulb Bracket Mounting Holes Routing Hole Bracket
Slide 16: Installation: Stacking
Installation: Stacking • Can only stack with another CME1056 • Stacking kit – Includes curtain, hanger, gasket and Ice Drop Zone wire harness – Remove cascading shield from lower unit Curtain Hanger Bottom Unit
Slide 17: Component Location
Component Location Electrical Box Refrigeration System Access Freezing Valves Compartment Inlet Water Solenoid Valve Controller Purge Valve Pump Reservoir
Slide 18: Cascading Shield
Cascading Shield Ice Sensor Cascading Shield Water Trough Cascading Shield Snapped Over Ice Sensors Tab of Ice Sensor Cube Deflector and Cascading Shield Removed - Trough Still on Back Plate
Slide 19: Controller
Controller • Similar to CME1356 – Purge Valve System – Remote has Harvest Bypass Valve System
Slide 20: Temperature Sensors
Temperature Sensors • Water Temp Sensor – Only used for diagnostics – Confirms if system is refrigerating the water • There’s also a Discharge Temp Sensor Pump Water Temp Sensor Hose
Slide 21: Initial Start Up
Initial Start Up • Turn on the water Liquid Line Valve • Switch on the power • Air and Water Cooled: – Push Freeze • Remote: – Wait 4 hours and open the liquid line valve – Push Freeze Low Side Access
Slide 22: Operation: Beginning Freeze
Operation: Beginning Freeze • Purge Valve Opens for a short time then closes • Water Valve Opens, fills reservoir • When reservoir is full, compressor starts
Slide 23: Operation: Water Control
Operation: Water Control Upper Sensor • Water Level Sensor – Two infrared sensors • Bottom one indicates reservoir full when blocked • Top one indicates reservoir needs water OR to terminate freeze when it is blocked Lower Sensor
Slide 24: Fan Control
Fan Control • Air Cooled Fan Motor – Powered from Controller • Shuts off before Harvest • Off during Harvest • Cycles on & off during Freeze if discharge temp is low (<125oF.) • Remote Fan Motor – Powered by Contactor • Fan is On whenever Compressor is On
Slide 25: Water Sequence: Freeze
Water Sequence: Freeze • Water level determines length of freeze cycle/cube size – Water reservoir tops off at the beginning of freeze – Water reservoir fills once more during freeze – The second time the top sensor is blocked stops the freeze cycle
Slide 26: Water Level Sensor
Water Level Sensor • The controller uses the water level sensor to sense Upper Eye changes in water quantity – Upper electric eye indicates when water falls Lower Eye – Lower electric eye indicates when water rises
Slide 27: Harvest Cycle
Harvest Cycle • First harvest after any restart – 5 minutes long to establish a base line • All harvests – Pump stops – Hot gas valve opens – Purge valve timer energized • Purge valve opens for 40 seconds • Nothing draining - pump is OFF
Slide 28: Harvest Cycle
Harvest Cycle • Remotes open their Harvest Bypass Valve for a few seconds – Time varies depending upon discharge temperature, • Colder discharge = more valve open time • All Models: Pump restarts, water drains, purge valve closes – Inlet water valve opens for 9 seconds • Only for harvest assistance,
Slide 29: Ice Sensing / Harvest Control
Ice Sensing / Harvest Control Harvest Begins Harvest Ends Total Current Harvest Cycle Time (prior cycle actual + a % of actual) Actual Time to Release Ice Percent of Actual (prior cycle) Last Cube Fell Harvest Harvest Began Ended
Slide 30: End of Harvest
End of Harvest • Time expired – Either the unit returns to freeze or – It shuts off on Bin Full - when the bin thermostat contacts are closed – If ice was not “seen” by the ice sensors • Will make one more cycle • If it happens again, the unit shuts down • Will automatically restart for another try
Slide 31: Ice and Evaporators
Ice and Evaporators • Ice Formation – Refrigerant enters the evaporators at the top Inlets Cubes form at top first Ice Harvests in vertical strips Strips break when impacting the cube deflector
Slide 32: Remote Operation
Remote Operation Liquid Line • CME1056R uses Check Valve Bypass check valve and Valve bypass valve system – Headmaster in condenser Valve Strainer Discharge Check Valve
Slide 33: Slide 33
Slide 34: Remote Operation
Remote Operation • Discharge line check valve seals off condenser during harvest – Isolates charge Discharge Line Check Valve
Slide 35: Harvest Bypass Valve
Harvest Bypass Valve • Opens a path between condenser and low side during harvest to meter in just enough refrigerant Harvest Bypass Valve
Slide 36: Liquid Line Check Valve
Liquid Line Check Valve • Prevents liquid migration to condenser during OFF cycle Liquid Line Check Valve
Slide 37: Liquid Line Access Valve
Liquid Line Access Valve • Controls liquid flow out of the receiver – Use allows two point recovery from the front of the machine • From low side • From liquid side – Liquid flow direction is same as freeze - check valves are open
Slide 38: Liquid Line Access Valve
Liquid Line Access Valve – An attached gauge will show Liquid Pressure • Connection is between Receiver and Heat Exchanger • Gauge reading is accurate during Freeze, but not Harvest – Discharge line check valve separates condenser – Gauge pressure in Harvest reads too high • Discharge pressure readi
Slide 39: Restarts
Restarts • Electrical Power Interruption – Automatic restart • Open the hot gas valve for 20 seconds • Open the purge valve • Start the pump • Shut the purge valve • Fill the reservoir • Start the compressor, freeze for 30 seconds • Harvest for 6 minutes
Slide 40: Restarts
Restarts • Water supply interruption – Automatic shut off and restart • Shuts off when float does not rise enough during water fill • Controller checks for water by opening the inlet water valve every 20 minutes – Will restart when the float rises far enough to break the bottom beam in the water lev
Slide 41: Purge Adjustment
Purge Adjustment • There are 5 levels – Maximum – Heavy – Standard - the factory setting – Moderate – Minimum • Number of green lights indicates purge level
Slide 42: Cleaning and Sanitation
Cleaning and Sanitation Push Harvest to release any ice and warm up the evaporators Push Clean and add 24 ounces of Scotsman Ice Machine Cleaner After 10 minutes push Clean again to flush out the Cleaner After 20 minutes push Off to stop
Slide 43: Water Distributors
Water Distributors Remove Water Distributors and Check Them - All Ports Must Be Open Evaporator Channels Must Be Open
Slide 44: Air Cooled Service
Air Cooled Service • Change Air Filters – Disposable – 20 x 20 x 1 – One on each side
Slide 45: Split Fan Shroud
Split Fan Shroud 1/4 turn fastener 1/4 turn fastener
Slide 46: Fan Motor Service
Fan Motor Service Loosen Bracket Loosen Bracket Set Screw
Slide 47: Service Diagnosis
Service Diagnosis • No ice, machine is off – Check the controller for lights • No lights = no power to controller – Check for power to machine – Check for transformer output
Slide 48: Service Diagnosis
Service Diagnosis • If there are lights - which ones are on? – Off light means the machine was switched off by someone – A Diagnostic light means a machine malfunction – Bin Full light means something has triggered either • the bin thermostat (closed) or • the ice sensors are blocked
Slide 49: Service Diagnosis
Service Diagnosis • Water Diagnostic Light – Blinks once and repeats • Water pump may not be working – Blinks twice and repeats • Water flow into machine too slow – Is ON without blinking • Inlet water valve leaking thru rapidly – If both the Water AND Refrigeration lights are on, check the thermist
Slide 50: Water Sensor Diagnostics
Water Sensor Diagnostics Power Water Fill Freeze Termination Ground or Negative
Slide 51: Clean Water Sensor Lenses
Clean Water Sensor Lenses Lenses Wipe lenses clean with a cotton swab - NOT A SCREWDRIVER!
Slide 52: Service Diagnosis
Service Diagnosis • Refrigeration Light – Blinks once and repeats • Ice release very slow, took maximum length harvest – Blinks twice and repeats • No ice sensed during maximum length harvest – Blinks three times and repeats • High discharge temperature
Slide 53: Service Diagnosis
Service Diagnosis • Refrigeration Light – Is ON without blinking • Low discharge temperature OR • Maximum length freeze cycle OR • Water cooled or remote may have cut out on high discharge pressure – Control resets automatically, but the controller may have timed out, depending upon when in the free
Slide 54: Service Diagnosis
Service Diagnosis • Bin Full light is ON – Bin may be full – 4 minute delay – Thermostat may be closed - is bin very cold? – Ice sensors may be blocked • Could need cleaning
Slide 55: Scale on Ice Sensors
Scale on Ice Sensors I worked until I got this dirty. Clean Me!
Slide 56: Removal of Sensors
Removal of Sensors • Remove cascading shield – Used on all two evaporator models • Reach in and twist cascading shield’s top forward to release it from its snap-on mounts • Push-pull sensors out of the machine
Slide 57: Cleaning Sensors
Cleaning Sensors • Clean sensors – Two types - tunnel mounted and module mounted – Eyes either in the back of the tunnel or on the module – Clean both with cotton swab or soft cloth Tunnel Type Module Mounted
Slide 58: Cleaning Sensors
Cleaning Sensors Clean Eyes Check Wire Remove Module Reassemble
Slide 59: Ice Sensors
Ice Sensors Clean Sensor Lenses with old soft toothbrush, NOT A SCREWDRIVER! Lens Ugly and Dirty! Clean Me! Good to Go! Note: Wet parts may appear clean, dry them to check.
Slide 60: Service Diagnosis
Service Diagnosis • Unit is running but both Diagnostic lights are ON – Check if temperature sensor (thermistor) set is plugged Temperature into the controller Sensor – If it is, replace the Connection temperature sensor set – Thermistors can also be checked by putting either probe in ice water • 32
Slide 61: Refrigeration Diagnostics
Refrigeration Diagnostics • Normal Cycle Time – 15 to 17 minutes at 70/50 – 16 to 19 minutes at 90/70 • Longer than normal times can be caused by – Dirty condenser – Low charge – Leaky inlet water valve – Inefficient compressor
Slide 62: Refrigeration Diagnostics
Refrigeration Diagnostics • Low Charge - Air or Water Cooled – Check by measuring suction line temperature at TXV bulb – Typical minimum for CME1056 • 0 to -5oF. • Low Charge - Remote – Will run until receiver is “dry” – Controller will shut unit down on max freeze time
Slide 63: Remote Refrigeration
Remote Refrigeration • To confirm low charge, recover and weigh OUT the charge • Headmaster will modulate when controlling pressure – Can only check at lower condensing temperatures < 70 - 75oF. – May not modulate at beginning of freeze - when heat load is high
Slide 64: Freeze Cycle Data
Freeze Cycle Data 50 60 T X V B u lb T em p s 45 40 50 35 S u ction P ressu re 30 40 25 T em p P S IG 20 30 15 10 20 5 0 10 -5 -1 0 0 T im e
Slide 65: Refrigeration Diagnostics
Refrigeration Diagnostics • TXV failure vs. Low Charge – High superheat is the symptom – Check by adding 10% of the charge • If no change, TXV is at fault • If superheat declines, charge is low and there is a leak • End of Freeze superheat maximums should be between 8oF. and 12oF.
Slide 66: Compressor Diagnostics
Compressor Diagnostics • Electrical – Starting • Check starting components & windings • Confirm capacitor PN & MFD • Check start relay – Use hard start kit – Impact shell – Overheating • TXV or Charge may be at fault
Slide 67: Compressor Diagnostics
Compressor Diagnostics • Confirm inefficient compressor – Process of elimination • TXV, Charge, Valves (water, hot gas) more likely to be at fault • Amp draw may be low if cannot pump to capacity • Normal amps: – 10, single phase; – 7 three phase
Slide 68: Hot Gas Valve Diagnostics
Hot Gas Valve Diagnostics • A hot gas valve is closed during a Freeze Cycle – If it leaks through, the heat from the discharge line will flow through it • Outlet will be hot - same as inlet – Frost at the evaporator connection is NORMAL • No frost also indicates a leak through
Slide 69: Refrigeration Service
Refrigeration Service R-404A Liquid Charge HFC Leak Detectors Weigh In Charge Evacuate to 300 microns Use Nitrogen Purge
Slide 70: Summary
Summary • CME1056 – Air Cooled – Water Cooled – Remote Air Cooled • CM3 technology • 30” wide • R-404A