MF 22 MF 30 MF 41 MF 51 MFE 61
Contents
1. lt 2 Ed lt 2 a lt ui gt lt lt o lt 5 SENSORS 65 JUST FOR AIR COOLED UNIT USED ONLY UNIT AT 240 V Page 37 WIRING DIAGRAM MF 51 AIR AND WATER COOLED B WHITE THREE PHASE G GREY N BLACK A BLUE M BROWN GV YELLOW GREEN PRINTED CIRCUIT BOARD POWER ON BIN FULL T 100mA NO WATER COND 3 STAND BY WRONG ROTATION EVAP TEMP TERMINAL BOARD JR jS im I I GEAR MOTOR ROTATION CONDENSER TEMP EVAPORATOR TEMP OPTICAL ICE LEVEL GEAR MOTOR EET MOTOVENTILATEUR PROTECTOR COMPRESSOR WATER LEVEL CAPACITOR SENSORS amp JUST FOR AIR COOLED UNIT iiit CONNECTION REPLACES NEUTRAL FOR MODEL 220 50 60 3 Page 38 WIRING DIAGRAM MFE 61 B WHITE AIR AND WATER COOLED THREE PHASE A BLUE M BROWN GV YELLOW GREEN PRINTED CIRCUIT BOARD C9 POWER ON 69 BIN FULL T 100mA a uc Q9 NO WATER FUSE 69 TOO HI COND 3 STAND BY WRONG ROTATION EVAP TEMP F46A O RESET TOO HI TEMP TERMINAL BOARD 2 WATER LEVEL CONDENSER TEMP O E o gt 2 lt INTERFACE PC BOARD HALL1 HALL 2 CONTACTOR 0 O GEAR MOTOR ROTATION C N GEAR MOTOR ROTATION2. 13 Reach through the adaptor and remove the coupling parts 14 Check both the coupling halves for chipping and wear and do not hesitate to replace them 15 Install the bottom bearing into its brass housing paying attention to have the white plastic ring facing up 16 Installthe upper bearing into the ice breaker starting by the radial portion that must be fitted with the flat surface facing up 17 Apply some lubricant grease onthe upper surface then install the rollers cage with the smaller openings of the same facing up so to leave a small gap between plastic cage and flat surface of the botton portion of the bearing see drawing 18 Apply some move lubricant then place the S S trust washer 19 After to have replace the O ring into the ice breaker fit the same on top of the auger and secure it with the top bolt 20 Install the auger icebreaker into the evaporator following the previous steps in reverse J REPLACEMENT OF THE GEAR MOTOR ASSY 1 OnMF22 30 MF 41 and MF 51 removethe front top and side rear panels and on MFE 61 remove the front rear top and left side panels 2 Remove the three four bolts and washers securingthe gear reducer baseto the unit chassis then remove bolts and lockwashers which attach the bottom of the aluminium adaptor to the gear reducer case cover 3 Follow the steps of item E to remove the gear motor magnetic sensor 4 Trace and disconnect the electric wires le
3. COMPRESSOR NL 00 FAN MOTOR ELECTRONIC CARD Page 17 EVAPORATOR TEM ICE LEVEL CONTROL SENSOR FAN MOTOR COMPRESSOR ELECTRONIC CARD NL NL 0 CONTACTOR COIL O GEAR MOTOR FAN MOTOR COM PRESSOR ELECTRONIC CARD Page 18 NOTE If after ten minutes from the compressor start up the evaporating tem perature has not dropped down to a value lower than 1 C 30 F the evaporating tem perature sensor detects such an abnormal situation and stops consequently the unit operation Inthis circustance the 5th warning YELLOW LED will blink Fig 3 qa After having diagnosed and eliminated the cause of the too hi evaporating temperature insufficient refrigerant in the system or compressor not running it is necessary to push the RE SET BUTTON of the PC BOARD restart the machine The unit before resuming the normal operation will go through the usual 3 minutes STAND BY period OPERATION CHECKS UPON THE UNIT START UP D Remove front service panel and if necessary install the refrigerant service gauges on the corresponding service valves to check both the HI and LO refrigerant pressures NOTE On air cooled models the condenser temperature sensor which is located within the condenser fins keeps the head condensing pressure between preset values
4. GREEN LIGHT Unit under electrical power YELLOW LIGHT Unit shut off at full storage bin YELLOW LIGHT Unit shut off due to a too lo water d level into float tank zs RED LIGHT BLINKING 3 minutes stand by RED LIGHT STEADY Unit shut off due to a too hi condensing temperature Unit shut off due to a too lo ambient temperature 41 C YELLOW LIGHT Unit shut off due to the wrong rotation direction of gear motor Unit shut off due to the too lo speed of gear motor Unit shut off due to a too hi evaporating temp gt 1 C after 10 min of Page 27 G P C BOARD DIP SWITCH The P C Board which controls the entire operation of the ice maker has a DIP SWITCH with eight switching keys see table which allow to change the functions and set up of some of the system controls as described in details herebelow The first DIP SWITCH Key if in ON allows the skipping of the 3 minutes delay time at every start up of the Ice Maker NOTE To prevent that the unit be subject to startings and stoppings in rapid sequence it is strongly recommended to keep this key in OFF position The 2nd key allows to make a rapid auto diagnosis of the P C Board outputs to compressor gearmotor and fan motor by energizing them in rapid sequence 2 seconds one at the time to make sure of their ope ration DURING THE AUTOMATIC OPERATION OF THE ICE MAKER THIS KEY MUST BE SET IN OFF POSITION
5. 9 Have the bin liner and cabinet been wiped clean 10 Has the owner user been given the User Manual and been instructed on the importance of periodic maintenance checks 11 Has the Manufacturer s registration card been filled in properly Check for correct model and serial number against the serial plate and mail the registration card to the factory 12 Has the owner been given the name and the phone number of the authorized SCOTSMAN Service Agency serving him G INSTALLATION PRACTICE Hand shut off valve Water filter Water supply line flexible hose 3 4 GAS male fitting Power line Main switch Drain fitting Vented drain Vented drain Open trapped vented drain AR WN 90 F WARNING This icemaker is not designed for outdoor installation and will not function in ambient temperatures below 10 C 50 F or above 40 C 100 F This icemaker will malfunction with water temperatures below 5 C 40 F or above 35 C Page 16 OPERATING INSTRUCTIONS START UP After having correctly installed the ice maker and completed the plumbing and electrical connections perform the following Start up pro cedure A Open the water supply line shutoff valve and put the unit under electrical power by moving the main switch on the power supply line to the ON position The first LED GREEN will glow to signal that unit is under power B
6. In the event of condenser clogged such to prevent the proper flow of the cooling air or in case the fan motor is out of operation the condenser temperature rises and when it reaches 70 C 160 F for air cooled version and 62 C 145 F for water cooled version the condenser temperature sensor shuts off the ice maker with the consequent light up of the RED WARNING LIGHT Fig 4 T After having diagnosed the reason of the temperature rise and removed its cause it is necessary to proceed as per the previous NOTE to start up again the operation of the ice maker E Check for the correct CUT OUT and CUT IN ofthe water level sensor by first shutting closed the water shutoff valve on the water supply line GEAR MOTOR ROTATION S CONDENSER TEMP y T gt 75 C oF Lu o DATA PROCESSOR EVAPORATOR TEM 2 ICE LEVEL CONTROL sO COMPRESSOR 0 NZ FAN MOTOR ELECTRONIC CARD This will cause a gradual decrease of the water level in the float reservoir and as soon as the level gets below the two vertical metal pins the flaker stops to operate andthe YELLOW warning LED will glow to signal the shortage of water Fig 5 NOTE The water level sensor detects the presence of water in the float reservoir and confirms it to the micro processor by maintaining a low voltage
7. L GEAR MOTOR Two on MFE 61 Model The gear motor is made of a single phase electric motor with permanent capacitor directly fitted on a gear box The drive motor rotor is kept aligned on its vertical axis by two ball bearings permanently lubricated The gear case contains a train of three spur gears with the first one in fiber to limit the noise level All the three gears are encased in case roller bearings and are covered by lubricant grease MOBILPLEX IP 44 Two seal rings one fitted on the rotor shaft and the other on the output shaft keep the gear case sealed The interior can be inspected and serviced by unbolting the two halves of the aluminium gear case housing M FAN MOTOR Air cooled version The fan motor is controlled through the TRIAC of the P C BOARD by the condenser temperature sensor Normally it operates to draw cooling air through the condenser fins In cold ambient situation the fan motor can run atintermittance as the condenser pressure must be kept between two corresponding head pressure values N WATER REGULATING VALVE Water cooled version This valve controls the head pressure in the refrigerant system by regulating the flow of water Page 29 going to the condenser As pressure increases the water regulating valve opens to increase the flow of cooling water O COMPRESSOR The hermetic compressor is the heart of the refrigerant system and it is used to circulate and retrieve the ref
8. MN AR SPECIFICATIONS 345 37 645 7 800 WATER OUTLET 9n WATER DUTLET WATER COOLED ONLY WATER NLET WATER COOLED ONLY Dimensions HEIGHT less legs 830 mm HEIGHT with legs 845 mm WIDTH 535 mm DEPTH 660 mm WEIGHT 93 Kg MF 51 MACHINE SPECIFICATIONS 9 Water req Model Cond unit Finish Comp HP It 24 HR MF 51 AS Air 600 MF 51 WS Water SIS 2 3000 Start Electric power cons Basic electr Amps Amps Watts Kwh per 24 HR Nr of wires Amps fuse 230 50 1 10 34 2000 45 1 5 mm 16 400 50 3 4 22 40 5 1 5 mm 16 A 15 C water temperature Page 10 SPECIFICATIONS ELECTRONIC MODULAR SUPERFLAKER MODEL MFE 61 Important operating requirements MIN MAX Air temperature 10 C 50 F 40 C 100 F L Water temperature 5 C 40 F 35 C 90 F Water pressure 1 bar 14 psi 5 bars 70 psi Electr voltage variations from voltage rating specified on nameplate 10 10 AIR COOLED MODEL WATER COOLED MODELS Kg C Kg 1150 10 1400 1100 1300 21 lt gj 1050 gj 1200 ul a u 1000 5 1100 5 E 32 lt lt 950 5 05 1000 5 a 38 n a 5 900 5 900 2 850 H a 800 2 9 9 i amp m m gt gt 750 600 lt 700 500 32 27 21 15 10 C 32 27
9. The freezing cylinder is made of a stainless steel vertical tube on which exterior is wrapped around the cooling coil with the evaporating chamber and in its interior is located the auger which rotates on its vertical axis and it is maintained aligned by the top and bottom bearings A water seal system is located in the bottom part of the freezer while at the top end is fitted the ice breaker The water constantly flowing into the cylinder bottom part freezes into ice when in contact with the cylinder inner walls The ice is then lifted up by the rotating auger and compacted and forced out by the ice breaker K ICE BREAKER Two on MFE 61 Model The ice breaker is fitted in the freezer upper part it has on MF 20 30 Model two breaker teeth to break the ice and with its slanted shape from the rear tooth to the front one it compacts and forces the ice out in an horizontal way On the other models the ice breaker is made by several rectangular openings where the ice is forced to pass through By undergoing this the ice looses its excess of water content so it drops into the bin in hard dry bits of ice In the ice breaker it is housed the top bearing which is made of two rolls bearings positioned to withstand the auger axial and radial loads This bearing is lubricated with a food grade water resistant grease NOTE Itis advisable to check the conditions of both the lubricant grease and the bearings every six months
10. Thoroughly evacuate the system to remove moisture and non condensable after drier replacement 6 Charge the system with proper refrigerant by weight see data plate of machine and check for leaks 7 Replace panels previously removed M REPLACEMENT OF THE FREEZING CYLINDER 1 Follow the steps atitem H to remove the ice spout 2 Removetheclampfastening the water hose to the water inlet port of the freezer assy Place a water pan under this water inlet port then disconnect the water hose and collect all water flowing from freezer and from water hose 3 Withdraw the evaporator sensor probe from the its holder as stated in item B 4 Recover the refrigerant from the system and transfer it in a container so to reclaim or recycle it Page 33 5 Unsolder and disconnect the capillary tube and the accumulator suction line assy from the outlet line of the freezing cylinder 6 Remove the three four bolts and washers securingthe gear reducer baseto the unit chassis then remove bolts and lockwashers which attach the bottom of the aluminium adaptor to the gear reducer case cover 7 Lift the freezer up and off the gear motor assembly then if necessary remove the aluminium adaptor by removing the three mounting screws and lockwashers NOTE Itis imperative to installa replacement whenever the sealed refrigeration system is open Do not replace the drier until all other repairs or replacements have been
11. 21 15 10 WATER TEMPERATURE WATER TEMPERATURE NOTE The daily ice making capacity is directly related to the condenser air inlet temperature water temperature and age of the machine To keep your SCOTSMAN FLAKER at peak performance levels periodic maintenance checks must be carried out as indicated on page 41 of this manual Page 11 Jj SPECIFICATIONS irs 1 1 1 FB amp 4 1 2 S BB 2 z Dimensions HEIGHT 850 mm WIDTH 1065 mm H DEPTH 698 mm WEIGHT 179 Kg s 55 als SRI Er 10 a MFE 61 MACHINE SPECIFICATIONS Model Cond unit Finish Comp HP odi MFE 61 AS Air 1150 MFE 61 WS Water S Steel 5 8000 Basic electr Amps Start Watts Electric power cons Nr of wires Amps fuse Amps Kwh per 24 HR 230 50 3 7 1 56 4 x 2 5 mm 25 400 50 3 N 34 28 3600 80 5x25mm 16 A 15 C water temperature Page 12 GENERAL INFORMATION AND INSTALLATION A INTRODUCTION This manual provides the specifications and the step by step procedures forthe installation start up and operation maintenance and cleaning for the SCOTSMAN MF 22 MF 30 MF 41 MF 51 and
12. approx 20 drops of Scotsman Sanitiser Antialgae P N 264000 00 then switch the unit ON 14 Leftthe unit running for approx 10 minutes then remove the copper wire used to jump the two sensors for the water level and place back correctly the cover on the float reservoir NOTE DO NOT use ice produced with the sanitising solution 15 With a sponge moisted with a sanitising solution wipe clean all the bin interior surfaces REMEMBER To prevent the accumulation of undesirable bacteria it is necessary to sanitise the interior of the storage bin with an anti algae disinfectant solution every week
13. COMPRESSOR GEAR MOTOR REDUCER GEAR MOTOR REDUCER CONTACTOR CAPACITOR SENSORS CONNECTION REPLACES NEUTRAL FOR MODEL 220 50 60 3 amp JUST FOR A COOLED UNIT OPTICAL ICE LEVEL N 2 2 4 u gt I m 3 lt o E SERVICE DIAGNOSIS Page 39 SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION Unit will not run No LED lighted on Bin full yellow LED glows No water yellow LED glows Red alarm LED glows Red alarm LED blinks Reverse rotation yellow LED blinks Reverse rotation yellow LED glows Blown fuse in P C Board Master switch in OFF position Inoperative P C Board Loose electrical connections Inoperative or dirty ice level control Shortage of water Water too soft High head pressure Ambient temperature too low 3 stand by Too hi evap temperature Shortage or lack of refrigerant Inoperative evaporator sensor Gear motor turns on reverse Too low gear motor rotating speed Drive motor doesn t turn Magnetic cylinder loose its magnetic charge Replace fuse amp check for cause of blown fuse Turn switch to ON position Replace P C Board Check wiring Replace or clean ice level control Seeremedies for shortage of water Installa mineral salt metering device Dirty condenser Clean INOPERATIVE fan motor Replace Move unit in warmer location None Wait the elapsed of 3 Check and charge refrigerant system Replace Check stator
14. EDDLED ONLY 5 3 amp 5 Dimensions 5 g HEIGHT less legs 525 mm HEIGHT with legs 542 mm WIDTH 533 mm DEPTH 533 mm WEIGHT 49 Kg MF 30 MACHINE SPECIFICATIONS Model Cond unit Finish Comp HP pode MF 30 AS Air 200 MF 30 WS Water dd 850 Basic electr Amps Pul Watts 2 Nr of wires Amps fuse 230 50 1 4 20 760 17 1 5 mm 10 A 15 C water temperature Page 6 SPECIFICATIONS ELECTRONIC MODULAR SUPERFLAKER MODEL MF 41 Important operating requirements MIN MAX Air temperature 10 C 50 F 40 C 100 F Water temperature 5 C 40 F 35 C 90 F Water pressure 1 bar 14 psi 5 bars 70 psi Electr voltage variations from voltage rating specified on nameplate 10 10 ice making capacity AIR COOLED MODELS WATER COOLED MODELS Kg C 360 10 32 38 Y AMBIENT TEMPERATURE 22 ICE PRODUCED PER 24 HRS AMBIENT TEMPERATURE ICE PRODUCED PER 24 HRS WATER TEMPERATURE WATER TEMPERATURE NOTE The daily ice making capacity is directly related to the condenser air inlet temperature water temperature and age of the machine To keep your SCOTSMAN FLAKER at peak performance levels periodic maintenance checks must be carried out as indicated on page 41 of this manual Page 7 SPECIFICATIONS 35 3 8 36 37164 U
15. and carries the ice upward along the refrigerated freezer inner walls and by doing sothe ice gets progressively thicker and harder The ice being costantly lifted up meet the teeth of the ice breaker which is fitted on the top end of the auger where it gets compacted cracked and forced to change from vertical into horizontal motion to be discharged out through the ice spout and chute into the storage bin Page 21 WATER INLET LINE MF 22 30 FLOAT TANK FREEZER WATER FEED LINE ICE SPOUT MF 41 51 FLOAT TANK ICE SPOUT FLOAT VALVE 2 FREEZER 2 CA FREEZER ce z WATER oli FEED LINE m gt 5 e MFE 61 FLOAT TANK FLOAT VALVE e 1107 el FREEZER WATER FEED LINE 9 227 m m N m ICE SPOUT ooo 0 0 0 0 0 0 litt 0000000 WATER INLET LINE tlf AU STANS 00600000 Page 22 By running the ice maker i e by putting the unit under power starts the automatic and continuous icemaking process which would not stop until the ice storage bin gets filled up to the level of the control eyes located on the ice chute As the ice level raise
16. freezer Clean it Check repair or replace Purge replace drier and re charge Water leaks Water seal leaking Water feed line to freezer leaking Float valve not closing Rubber spout gasket leaking Replace water seal Check and fasten hose clamp Check and adjust float valve setting Screw Remove spout and replace gasket Excessive noise or chattering Mineral or scale deposit on auger and inner freezer walls Low suction pressure Water feed line to freezer clogged Low water level into freezer Worn freezer bearings Remove and manually polish auger and inner walls of freezer barrel using emery paper Add refrigerant to rise suction pressure Vent and clean it Adjust to approx 20 mm below ice spout Check and replace Gear motor noise Worn rotor bearings Shortage or poor lubricant in gear case Gear case bearings and racers worn out Check and replace Check for proper lubr opening gear case Top of gears must be covered with lubr Check and replace worn parts Shortage of water Strainer at water inlet fitting clogged Float reservoir water nozzle clogged up Remove strainer and clean Remove float valve and clean nozzle Page 41 MAINTENANCE AND CLEANING INSTRUCTIONS A GENERAL The periods andthe procedures for maintenance and cleaning are given as guides and are not to be construed as absolute or invariable Cleaning especially will vary depen
17. is open Do not replace the drier until all other repairs or replacements have been completed 7 Toinstall the replacement water regulating valve follow the above steps in reverse NOTE Thoroughly evacuate the system to remove moisture and non condensables after water regulating valve replacement NOTE The water flow that passes through the valve can be adjusted by means of the valve setting stem in order to have a condensing pressure of 8 5 bar on MF 22 and of 17 bar on MF 30 41 51 MFE 61 Q REPLACEMENT OF COMPRESSOR 1 Remove front top and side rear panels on models MF 22 30 MF 41 and MF 51 and the front panel on model MFE 61 2 Remove the cover and disconnect the electrical leads from the compressor junction box 3 Recover the refrigerant from the system and transfer it in a container so to reclaim or recycle it 4 Unsolder and disconnect both the suction line and the discharge line from the compressor 5 Removethefourcompressor mounting bolts and the compressor from the unit base 6 Unsolder suction and process header from compressor and retain it to be used on new compressor NOTE Always install a replacement drier whenever the sealed refrigeration system is open Do notreplace the arier until all other repairs or replacements have been completed 7 To install the replacement compressor follow the above steps in reverse NOTE Thoroughly evacuate the
18. top panel 2 Remove the insulation from the refrigerant tubing connecting the freezer to the accumulator to gain access to the sensor probe holder and pull it out 3 Trace the evaporator sensor terminal plug blue color on the rear side of the control box and remove it from its socket by carefully pulling out the terminal plug securing clip 4 install the replacement evaporator sensor follow the above steps in reverse C REPLACEMENT OF CONDENSER TEMPERATURE SENSOR 1 Remove the front top panelandon 61 model even the right side panel 2 Trace the condenser sensor probe located within the condenser fins on air cooled version and withtrow it On water cooled version remove it by opening the plastic strap reusable securing the probe to the refrigerant liquid line 3 Trace the condenser sensor terminal plug black color on the rear side of the control box and remove it from its socket by carefully pulling out the terminal plug securing clip 4 Toinstallthereplacementcondenser sensor follow the above steps in reverse D REPLACEMENT OF THE OPTICAL ICE LEVEL CONTROL 1 On MF 22 MF 30 MF 41 and MF 51 remove the front top panel while on MFE 61 remove the front and rear panels 2 Trace the optical ice level control terminal plug black with four terminal pins on the rear side of the control box and draw it out from its Socket by carefully slackening the fastening tie 3 Unloose the two secu
19. winding and capacitor Check rotor bearings freezer bearings and interior of freezer for scores Replace whatever worn or damaged Check for power open circuit etc Replace magnetic cylinder Compressor cycles intermittently Low voltage Non condensable gas in system Compressor starting device with loose wires Check circuit for overloading Check voltage at the supply to the building If low contact the power company Purge the system Check for loose wires in starting device Low ice production Capillary tube partially restricted Moisture in the system Low water level in the freezer Shortage of refrigerant Pitted or stained auger surface Blow charge add new gas amp drier after evacuating system with vacuum pump Same as above Adjust to approx 20 mm below ice spout Check for leaks amp recharge Clean or replace auger Page 40 SERVICE DIAGNOSIS SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION Wet ice Ambient temperature too high Under or overcharge of refrigerant High water level in the freezer Faulty compressor Worn out of the auger Move unit to cooler location Recharge with correct quantity Lower to approx 20 mm below ice Spout Replace Replace Machine runs but makes no ice Water not entering in the freezer Drive motor or gear stripped Moisture in the system Air look in feed line to freezer Vent it Clogged feed line to
20. Elapsed the 3 minutes stand by period the unit starts operating with the activation in sequence of the following assemblies GEAR MOTOR S COMPRESSOR FAN if unit is an air cooled version kept under control by the condenser temperatu re sensor which has its probe within the condenser fins Fig 2 C Elapsed2or3 minutes from the compressor start up observe that flaker ice begins dropping off the ice spout to fall through the ice chute into the storage bin NOTE Every time the unitis put under power after being kept for sometime in shut off conditions electrically disconnected the RED LED will blink for 3 minutes after which the unit will start up with the immediate operation of the gear motor assembly and after few seconds of the compressor Fig 1 NOTE The first ice bits that drop into the ice storage binare notso hard as the evaporating temperature has not yet reached the correct operating value It is necessary to allow the ice just made to cure itself and wait for about ten minutes for the evaporating tem perature to reach the correct value so to make more hard bits of ice WATER LEVEL O 0 en GEAR yROTATION PENNA s Tom _ 9 0 CONDENSER TEMP T gt 1 C 9 EVAPORATOR TEMP D lt 2 0 L pro ICE LEVEL CONTROL O 0 eee eae ee L TRANSF I
21. FE 61 by the metered amount of water passing through the condenser which is regulated by the action of the Water Regulating Valve that has its capillary MF 22 30 41 51 EVAPORATOR ACCUMULATOR SUCTION LINE gt CONDENSER FAN MOTOR REFRIGERANT CIRCUIT The hot gas refrigerant discharged out from the compressor reaches the condenser where being cooled down condenses into liquid Flowing into the liquid line it passes through the drier filter then it goes all the way through the capillary tube where it looses some of its pressure so that its pressure and temperature are lowered Next the refrigerant enters into the MFE 61 ACCUMULATOR SUCTION LINE EVAPORATOR evaporator coil wrapped around the freezer inner tube The water being constantly fed at the interior of the freezer inner tube exchan ge heat with the refrigerant circulating into the evaporator coil this cause the refrigerant to boil off and evaporate thereby it changes from liquid into vapor The vapor refrigerant then passes through the suction accumulator and through the suction line where the refrigerant exchanges heat with the one flowing into the capillary tube warmer before being sucked into the compressor to be recirculated The refrigerant head pressure is kept between two pre set values 8 9 bar 110 125 psig on MF 22 and 17 18 bar 240 250 psig on MF 30 MF 41 MF 51 and
22. MFE 61 by the condenser temperature sensor which has its probe located within the condenser fins in air cooled versions COMPRESSOR CAPILLARY TUBE DISCHARGE LINE m CONDENSER 0000001 DRIED FAN MOTOR Page 23 tube connected to the liquid refrigerant line As pressure increases the water regulating valve The RED LED starts blinking and three opens to increase the flow of cooling water to the minutes later the flaker unit resume its normal condenser operating mode The condenser temperatu NOTE In case the condenser temperature probe senses that the condenser tempera ture has rised to 70 C on air cooled version or 62 C on water cooled version for one of the following abnormal reasons CLOGGED CONDENSER Air cooled version INSUFFICIENT FLOW OF COOLING WATER Water cooled version FAN MOTOR OUT OF OPERATION Air cooled version AMBIENT TEMPERATURE HIGHER THEN 43 C 110 F itcauses the total and immediate SHUT OFF of the machine in order to prevent the unit from operating in abnormal and dangerous conditions When the ice maker stops on account of this protective device there is a simultaneous glowing of the RED LED warning the user of the Hi Temperature situation After having eliminated the source of the excessive condenser temperature to restart the ice machine it is necessary to push the RE SET button re sensor has a
23. MFE 61 Modular Icemakers The Electronic Flakers and Superflakers are quality designed engineered and manufactured Their ice making systems are thoroughly tested providing the utmost in flexibility to fit the needs of a particular user NOTE To retain the safety and performance built into this icemaker it is important that installation and maintenance be conducted in the manner outlined in this manual Storage Bin Since the MF series Modular Flakers do not have their own attached ice storage bins itis necessary to use an auxiliary bin as detailed herebelow B 190 S in combination with MF 22 and MF 30 B 390 S with its companion KBT 10 Top Cover in combination with MF 20 MF 30 MF 41 and MF 51 B 550 S with its companion KBT 1 Top Cover in combination with MF 41 and MF 51 B 1025 S in combination with MF 41 and MF 51 B 1350 S in combination with MF 41 MF 51 and MFE 61 B UNPACKING AND INSPECTION Icemaker 1 Callyour authorized SCOTSMAN Distributor or Dealer for proper installation 2 Visually inspect the exterior of the packing and skid Any severe damage noted should be reportedto the delivering carrier and a concealed damage claim form filled in subjet to inspection of the contents with the carrier s representative present 3 a Cutandremove the plastic strip securing the carton box to the skid b Remove the packing nails securing the carton box to the skid C Cut open the top of the car
24. O O o m rel 1 en GEAR MOTOR 3 ROTATION 0 5 d o O 9 M CONTACTOR COIL CONDENSER TEMP 8 p o etoile Z e O O gt EVAPORATOR TEMP lt 2 GEAR MOTOR ICE LEVEL CONTROL EE 0 5 FAN MOTOR 5 N MS TRANSF e e 8 ELECTRONIC CARD Page 20 NOTE The ICE LEVEL CONTROL INFRARED SYSTEM is independent of the temperature however the reliability of its detection can be affected by external light radiations or by any sort of dirt and scale sediment which may deposit directly on the light source and on the receiver To prevent any possible ice maker malfunction it is advisable to locate the unit where it can t be reached by any direct light beam or light radiation and to follow the instructions for the periodical cleaning of the light sensor elements as detailed in the MAINTENANCE AND CLEANING PROCE DURES M Ifpreviously installed remove the refrigerant service gauges and re fit the unit service panels previously removed Instruct the owner user on the general operation of the ice machine and about the cleaning and care it requires FIG 6 WATER LEVEL OO 0 0 en GEAR RA ROTATION 222 Sl Sor L 9 CONDENSER TEMP 9 sr C EVAPORATOR TEMP p lt o8 0 a ICE LEVEL CONTROL O 0 qoa L O C TE m
25. Place the KBT 1 10 Top Cover on top of Storage bin using care not to wrinkle or tear the gasket 5 On the B 1025 S and 1350 S Storage Bin unloose the screws securing the S S Top Cover to the storage bin and remove it 6 Lay out on the bin top the plan of the ice machine as it will be located on the bin and cut an opening in the bin top forthe ice drop area cover the edges of the opening with vinyl tape 7 Install the gasket on the bin top around drop opening of the bin top apply sealant along the inside of the gasket 8 Position andinstall the four aluminium front to rear stiffeners U shaped paying attention to the guideline shown on the drawing CUT GASKET HERE STIFFENER BIN WALL GAKET 5 LL NS NOTE Bin wall gasket must be cut to clear the stiffener ends as shown on drawing Do not put any stiffeners crossing the ice drop opening 9 Install the bin top in its position onto the bin top by place the rear side of top against rear edge of the bin lower the front of the top onto the stiffeners re fit the screws previously removed as per step 5 10 Install the Modular Flaker or Superflaker onto the Top Cover of storage bin pay attention to match the ice chute with the Bin Top opening Installation of lift door catch B 1025 S On the Storage Bin B 1025 S when the ice maker is installed flush with the bin front it is required to mount the lift door ca
26. SERVICE MANUAL MF 22 MF 30 MF 41 MF 51 MFE 61 134 A R 404 A VERSION Electronic modular flakers and superflakers SCOTSMAN Page 1 TABLE OF Table of contents page CONTENTS Specl caionsME22 2 Specifications MF 41 Specifications MF 51 Specifications MFE 61 es GENERAL INFORMATION AND INSTALLATION Introduction Unpacking and Inspection Ice maker Unpacking and Inspection Storage bin Location and levelling 13 Electrical connections 14 Water supply and drain connections 14 Final check list 14 nstallation practice OPERATING INSTRUCTIONS Start up 16 Operational checks 18 PRINCIPLE OF OPERATION How it works Water circuit 21 Refrigerant circuit 22 ADJUSTMENT REMOVAL AND REPLACEMENT PROCEDURES Adjustment of the evaporator water level Replacement of evaporator temperature sensor Replacement of condenser temperature sensor Replacement of ice level light control Replacement of P C Board 31 Replacement of the ice spout 31 Replacement of the auger water seal bearings and coupling 31 Replacement of fan motor 32 Replacement of drier 33 Replacement of the freezing cylinder 33 Replacement of air cooled condenser 33 Replacement of water cooled condenser 33 Replacement of water regulating valve water cooled models 34 Replacement of compressor 34 MAINTENANCE AND CLEANING INSTRUCTIONS General Icemaker Cleaning instructions of wa
27. WARNING This auto diagnosis must be performed inthe shortest possible time in order to avoid frequent startings and stoppings of the electrical components which may cause demages to their windings and controls The key 3 is OF NO USE therefore it can be indifferently positioned in ON or OFF position without influencing at all the unit operations The 4th key allows the switching of the unit re set from manual OFF setting to automatic ON setting when the machine operation has been cut out by any of the safety control devices The keys 5 6 and 7 may be used to vary the temperature differential determined by the condenser temperature sensor for the cut in and operation DIP SWITCH FACTORY SETTING COMBINATIONS DIP SWITCH 1 2 3 4 5 6 7 8 Air cooled OFF OFF ON OFF ON ON ON ON Water cooled OFF OFF ON OFF ON ON ON OFF Page 28 cut out of the fan motor as indicated in the following table DIFFERENTIAL VARIATIONS OF CONDENSER TEMPARATURE SENSOR ACCORDING TO THE DIP SWITCH KEY SETTING COMBINATIONS 5 6 7 DELTA T C ON ON ON 0 5 OFF ON ON 1 0 ON OFF ON 1 5 OFF OFF 2 0 ON ON OFF 2 5 OFF ON OFF 3 0 ON OFF OFF 3 5 OFF OFF OFF 4 0 The best combination which assure the best performance of the ice maker is the first one on the table that gives a differential equal to 0 5 C from cut in and cut out of the fan motor to keep the condensing temperature and pressure as strigh
28. a long run allow 3 cm pitch per meter 1 4 pitch per foot Install a vertical open vent on drain line high point at the unit drain connection to ensure good draining The idealdrain receptacle is atrapped and vented floor drain WATER DRAIN WATER COOLED MODELS Connectthe 3 4 GAS male fitting ofthe condenser water drain utilizing a second flexible tubing to the open trapped and vented drain This additional drain line must not interconnect to any other of the units drains NOTE The water supply and the water drain must be installed to conform with the local code In some case a licensed plumber and or a plumbing permit is required F FINAL CHECK LIST 1 Is the unit in a room where ambient temperatures are within a minimum of 10 C 50 F even in winter months 2 Is there at least a 15 cm 6 clearance around the unit for proper air circulation 3 Is the unit level IMPORTANT 4 Have all the electrical and plumbing connections been made and is the water supply shut off valve open 5 Has the voltage been tested and checked against the data plate rating 6 Has the water supply pressure been checked to ensure a water pressure of at least 1 bar 14 psi 7 Have the bolts holding the compressor down been checked to ensure that the compressor is snugly fitted onto the mounting pads 8 Checkall refrigerantlines and conduit lines to guard against vibrations and possible failure Page 15
29. ade of a single phase electric motor with a permanent capacitor This motor is directly fitted in the gear case through which it drives in counter clockwise rotation at a speed of 9 5 r p m the freezer auger being linked to it by the ratched coupling NOTE the event the gear motor one of the two on MFE 61 will tend to rotate in the wrong direction counterclockwise the unit will Stop immediately with the glowing ofthe WARNING YELLOW LED on account of the intervention of the Electromagnetic Safety Device based on Hall Effect principle After having diagnosed and eliminated the source of the gear motor wrong rotation to restart the unit it is necessary to press the RE SET push button or switch OFF and ON the power line main disconnnect switch Fig 8 The RED LED will start blinking and after 3 minutes the ice maker will resume its total operations by running first the gear motor and then the compressor Too low ambient and water temperature well below the limitations of respectively 10 C and 5 C 50 F and 40 F or frequent interruptions of the water supply to the freezing cylinder clogging of the water hose connecting the float reservoir to the water inlet at the bottom of the freezer may cause the ice to gettoo hard and compactloosing fluidity and thereby seizing the auger This situation will put under excessive strain and load the entire drive system and freezer bearings When the gear motor rot
30. ads of the drive motor Lift and remove the entire gear motor assembly 5 Toinstall the replacement gear motor assy follow the above steps in reverse K REPLACEMENT OF FAN MOTOR 1 Remove the front top and side rear panels on models MF 22 30 MF 41 and MF 51 and the front panel on model MFE 61 2 Remove screws and yellow green ground wire Trace the electrical leads of fan motor and disconnect them 3 Onthemodels MF 22 30 MF 41 and MF 51 remove the bolts securing the fan motor bracket to the cabinet base and then remove the assembly On model MFE 61 unloose with an allen key the screw securing the fan blade hubto the fan motor shaft then unscrew the bolts holding the fan motor to its protection grid 4 Toinstall the replacement fan motor follow the above steps in reverse NOTE When installing a new fan motor check that the fan blades do not touch any surface and move freely L REPLACEMENT OF DRIER 1 Remove the front top and side rear panels on models MF 22 30 MF 41 and MF 51 and the front panel on model MFE 61 2 Recover the refrigerant from the system and transfer it in a container so to reclaim or recycle it 3 Unsolder the refrigerant lines from the two ends of the drier the capillary tube from one side on MF 30 4 install the replacement drier remove factory seals and solder the refrigerant lines and the capillary tube taking precautions to NOT OVERHEAT the drier body 5
31. asr e o 5 o NM NIA OOG GEAR MOTOR EME FAN MOTOR ELECTRONIC CARD PRINCIPLE OF OPERATION WATER CIRCUIT The water enter in the machine through the water inlet fitting which incorporates a strainer located at the rear side of the cabinet then it goes to the water reservoir flowing through a float valve NOTE The presence ofthe water in the float reservoir is detected by a system of two sensors which operates in conjunction with the P C Board The two sensors use the water as a conductor to maintain a low voltage current flow between them In case the water used is very soft de mineralized or the float reservoir gets empty the current flow between the sensors become so weak or is no longer maintained that as consequence the P C Board shutoff the flaker operation with the simultaneous glowing of the YELLOW LED signalling Shortage of water The float reservoir is positioned at the side of the freezing at such an height to be able to maintain a constant water level The water flows from the reservoir into the bottom inlet of the freezer to sorround the stainless steel auger which is vertically fitted in the center of the freezer Inthefreezerthe incoming water gets chilled into soft slush ice which is moved upward by the rotating action of the auger The auger rotates counter clockwise within the freezer powered by a direct drive gear motor
32. ating speed is slowed below 1300 r p m from the normal speed of 1400 r p m the Electromagnetic Safety Device transmits an electrical signal to the MICROPROCESSOR to stop immediately the unit operations like it occures for the wrong rotation with the lighting up of the YELLOW WARNING LED This to relieve from the excessive load all the electrical and mechanical components of the entire Drive System and extend their durability NOTE Afterhaving diagnosedand eliminated the source of the gear motor slow rotation to restart the unit it is necessary to press also in this case the RE SET push button or switch OFF and ON the power line main switch O Q L5 e 0000 en GEAR ROTATION 2588 5 n CONDENSER TEMP 27 O LLI 7 O EVAPORATOR TEMP r O O ICE LEVEL CONTROL O o OF L I O N 2 TRANSF DP 0 Lu o o NM FAN MOTOR ELECTRONIC CARD REFRIGERANT METERING DEVICE capillary tube REFRIGERANT CHARGE R 134 A Air cooled Water cooled MF 22 440 gr 400 gr Page 25 REFRIGERANT CHARGE R 404 A Air cooled Water cooled MF 30 540 gr 410 gr MF 41 750 gr 600 gr MF 51 880 gr 820 gr MFE 61 2400 gr 1200 gr NOTE Before charging the refrigerant system always check the type of refrigerant and quantity as specified on the individ
33. ator 4 On model MF 22 30 grasp the wire cap hook at the top of the freezer and pull out the auger attached cap and ice breaker from the top of the freezer On models MF 41 MF 51 and MFE 61 with two flatscrewdrivers insertthen onthe space between the icebreaker and the upper flange and by tilting them lift the icebreaker and auger assembly Graspthe icebreaker and remove the icebreaker and auger assembly by lifting them from the evaporator NOTE If the auger cannot be pulled out proceed to steps 10 and 11 ofthis paragraph to gain access to the auger bottom Then with a rowhide mallet or placing a piece of wood on the bottom end of the auger tap this bottom to break loose the auger and be able then to pull it out as per step 4 above 5 On model MF 22 30 with a circlip plier re move the retaining ring and cap hook from the ice breaker while onthe superflaker models remove the plastic cap using a screwdriver as a lever 6 _Unloose and remove cap screw and remove the ice breaker from the auger Page 32 7 Clean away the old grease from the interior oftheice breaker and inspectthe bearing pressed into the top of the ice breaker and if worn do not hesitate to replace it 8 Inspectthe conditions ofthe O ring if torn or worn replace it WARNING The top bearing assembly works in critical conditions for what concern its lubrication as it is haused in the ice breaker where the formation of condensat
34. ce water isthe mostimportant single ingredient in producting ice you cannot emphasize too much the three items listed above Low water pressure below 1 bar may cause malfunction of the ice maker unit Water containing excessive minerals will tend to produce scale build up on the interior parts of the water system while too soft water with too lo contents of mineral salts will produce a very hard flaker ice WATER SUPPLY Connect the 3 4 GAS male of the water inlet fitting using the food grade flexible tubing supplied to the cold water supply line with regular plumbing fitting and a shut off valve installed in an accessible position between the water supply line and the unit If water contains a high level of impurities it is advisable to consider the installation of an appropriate water filter or conditioner WATER SUPPLY WATER COOLED MODELS The water cooled versions of SCOTSMAN Ice Makers require two separate inlet water supplies one for the water making the flaker ice and the other for the water cooled condenser Connect the 3 4 GAS male fitting of the water inlet using the flexible tubing supplied to the cold water supply line with regular plumbing fitting and a shut off valve installed in an accessible position between the water supply line and the unit WATER DRAIN The recommended drain tube is a plastic or flexible tube with 18 mm 3 4 I D which runs to an open trapped and vented drain When the drain is
35. completed 8 Toinstallthe replacement evaporator follow the above steps in reverse NOTE Thoroughly evacuate the system to remove moisture and non condensables after evaporator replacement N REPLACEMENT OF AIR COOLED CONDENSER 1 Remove front top and side rear panels on models MF 22 30 MF 41 and top MF 51 andthe front and right side panel on model MFE 61 2 Remove from the condenser fins the condenser ambient temperature sensor probes 3 Remove the two bolts attaching the condenser to the base 4 Recover the refrigerant from the system and transfer it in a container so to reclaim or recycle it 5 Unsolder the refrigerant lines from the condenser and remove it from the unit NOTE Itis imperative to install a replacement whenever the sealed refrigeration system is open Do not replace the drier until all other repairs or replacements have been completed 6 Toinstallthe replacement condenser follow the above steps in reverse NOTE Thoroughly evacuate the system to remove moisture and non condensables after condenser replacement Page 34 O REPLACEMENT OF WATER COOLED CONDENSER 1 Remove front top and side rear panels on models MF 22 30 MF 41 and MF 51 andthe front and right side panel on model MFE 61 2 Remove the condenser temperature sensor probes from condenser 3 Remove bolts which secure the condenser to the unit base 4 Remove th
36. cooled models clean condenser using vacuum cleaner whisk broom or non metallic brush taking care to do not damage the condenser ambient temperature sensor 8 Check for water leaks and tighten drain line connections Pour water down bin drain line to be sure that drain line is open and clear 9 Check the ice level control sensor to test shut off Put your hand between the light source and the receiver so to cut off the light beam for at least 10 seconds This should cause the immediate extinguishing of the RED LED located in the front face of P C Board and 10 seconds later the total stopping of the ice maker with the simultaneous light up of the Full Bin Yellow LED Within few seconds from the removal of the hand from between the sensor lights the ice maker resume its operation NOTE The ice level control uses devices that sense light therefore they must be kept clean enough so they can see Every three months remove the optical system then clean wipe the sensing eyes with a clean soft cloth 10 Check for refrigerant leaks and for proper frost line which should frost as far as approx 20 cm 8 from the compressor When doubtful about refrigerant charge install refrigerant gauges on corresponding service valves and check for correct refrigerant pressures See Operating pressure at page 23 of this manual 11 Check that fan blades move freely and are not touching any surfaces 12 Remove the r
37. current flow between the two metal pins using the water as conductor WARNING The use of de mineralized water water with no salt content having an electrical conductivity lower than 30 uS will cause break with the consequent CUT OUT of the flaker and the glowing of the YELLOW LED of water shortage even with water in the reservoir Page 19 Opening the water supply line shutoff valve to fill up again the float reservoir the YELLOW LED goes off while the RED LED starts blinking After 3 minutes the unitresumes its total operation with the immediate start up of the gear motor and few seconds later of the compressor F Check for the correct operation of the electronic eye one per each ice chute on model MFE 61 of the optical ice level control by placing one hand between the sensing eyes located in the ice chute to interrupt the light beam This interruption will cause an immediate extinguishing of the RED LED located on the front of the P C Board and after about 6 seconds causes the shutoff of the unit with the simultaneous lighting of the YELLOW LED signalling the full bin situation Fig 6 Allow the resumption ofthe light beam previously interrupted and after about 6 seconds the flaker will resume through the 3 minutes STAND BY period the ice making process with the extinguishing of the YELLOW LED A NL ware 1 il o 0 RESET
38. ding upon local water and ambient conditions and the ice volume produced and each icemaker must be maintened individually in accordance with its particular location requirements B ICEMAKER The following maintenance should be scheduled at least two times per year on these icemakers 1 Check and clean the water line strainer 2 Remove the cover from the float reservoir care to do not damage the two water sensors and depress the float to make sure that a full stream of water enters into the reservoir If not gently remove the float valve from its reservoir bracket than clean the hole of the nozzle 3 Checkthat the icemaker is levelled in side to side and in front to rear directions 4 Check that the water level in the water reservoir is below the overflow but high enough that it does not run out of the spout opening 5 Clean the water system water reservoir andthe interior of freezing cylinder using a solution of SCOTSMAN Ice Machine Cleaner Refer to procedure C cleaning instructions and after cleaning will indicate frequency and proce dure to be followed in local areas NOTE Cleaning requirements vary according to the local water conditions and individual user operation 6 f required polish the two sensor rods secured to the float reservoir cover heavy scale sediment on them can be removed with the help of a bit of SCOTSMAN Cleaner plain 7 With the ice machine and fan motor OFF on air
39. e corbin clamps and disconnect the plastic hoses from the water cooled condenser 5 Recover the refrigerant from the system and transfer it in a container so to reclaim or recycle it 6 Unsolder the refrigerant lines from the condenser and remove it from the unit NOTE Itis imperative to installa replacement drier whenever the sealed refrigeration system is open Do not replace the drier until all other repairs or replacements have been completed 7 Toinstallthe replacement condenser follow the above steps in reverse NOTE Thoroughly evacuate the system to remove moisture and non condensables after condenser replacement P REPLACEMENT OF WATER REGULATING VALVE WATER COOLED MODELS 1 Remove the front top and side rear panels on models MF22 30 MF 41 and MF 51 and left side panel on model MFE 61 2 Closetheshut off valve on the water supply line and disconnect it at the rear of the flaker 3 Remove corbin clamp and disconnect the water hose from the outlet of water regulating valve 4 Unloose the nut securing the water regulating valve to the unit frame 5 Recover the refrigerant from the system and transfer it in a container so to reclaim or recycle it 6 Trace the water regulating valve capillary tube and unsolder its end from the refrigerant line then remove it from the unit NOTE Itis imperative to installa replacement whenever the sealed refrigeration system
40. etaining ring and the hook and cap from the top of the freezer assembly then inspect the top bearing wipe clean of all grease and apply a coating of food grade water proof grease NOTE It is recommended to use only food grade and waterproof grease to lubricate the freezer top bearing 13 Check the quality of ice Ice flakes should be wet when formed but will cure rapidily to normal hardness in the bin NOTE It is not abnormal for some water to emerge from the ice spout with the flaker ice C CLEANING INSTRUCTIONS OF WATER SYSTEM 1 Switch OFF the Master disconnect switch on the power line 2 Remove all ice stored in the bin to prevent it from getting contaminated with the cleaning solution 3 Shutclose the water shutoff valve on water line Page 42 4 Remove the top panels to gain access to the water reservoir 5 Removethefloatreservoir cover and with a piece of copper wire short the two metal pins of the water level sensor 6 Place a water pan under the freezer water inlet port disconnect the water hose from this port and allow the water from the freezer to flow into the pan Then refit the water hose to the freezer water inlet port 7 Prepare the cleaning solution by diluting in a plastic container two or three liters of warm water 45 50 C with a 0 2 0 3 liters of SCOTSMAN Ice Machine Cleaner on MFE 61 double the quantities WARNING The SCOTSMAN Ice Machine Clea
41. further safety function which consist in preventing the unit from operating in Lo ambient conditions i e when the condenser temperature equivalent to the ambient temperature is lower then 1 C 34 F Fig 7 As soon as the ambient temperature rises up to 10 C the P C Board restarts automatically the machine on the three minutes starting time The refrigerant suction or Lo pressure sets normal ambient conditions on the value of 0 5 bar 7 psig on MF 22 and of 2 4 2 6 bar 34 36 psig on MF 30 MF 41 MF 51 and MFE 61 after few minutes from the unit start up This value can vary of 0 1 or 0 2 bar 1 5 3 psig in relation to the water temperture varia tions influencing the freezer cylinder NOTE If afterten minutes from the unit start up no ice is made and the evaporating temperature detected by the evaporator sensor results to be higher than 1 C 30 F the ice maker stops and the 5th WARNING YELLOW LED blinks COMPRESSOR O O Oe DATA PROCESSOR NL l gt T CONTACTOR COIL e Y 2 GEAR MOTOR FAN MOTOR ELECTRONIC CARD Page 24 MECHANICAL SYSTEM The mechanical system ofthe SCOTSMAN Flaker machines consists basically of a gear motor assembly two on model MFE 61 which drives through a ratched coupling a worn shaft or auger placed on its vertical axis within the freezing cylinder two on model MFE 61 The gear motor is m
42. he light beam gets interrupted for as longer as 6 seconds the ice machine stops with the glowing up of the 2nd YELLOW LED to monitor the full ice bin situation The 6 seconds of delay prevents that any minimum interruption ofthe light beam due to the regular ice chuting through the ice chute may stop the operation of the unit As soon as the ice is scooped out with the resumption of the light beam between the two infrared sensor of ice level control the RED LED lights up and after 6 seconds the ice machine resume its operation with the simultaneous extinguishing the 2nd YELLOW LED F P C BOARD The P C BOARD fitted in its plastic box located in the front of the unit consists of two separated printed circuits one at high and the other at low voltage protected by three fuses integrated with a RE SET button Also it consists of five aligned LEDS monitoring the operation of the machine of one extra monitoring RED LED ofa 8 keys DIP SWITCH and of input terminals for the leads of the sensor probes as well as input and output terminals for the leads of the ice maker electrical wires The P C BOARD is the brain of the system and it elaborates through its micro processor the signals received from the sensors in order to control the operation of the different electrical components of the ice maker compressor gear motor etc The five LEDS placed in a row in the front of the P C BOARD monitor the following situations
43. his safety device it is necessary first to eliminate the cause that has generated the intervention of the device and then press the RE SET push button or switch OFF and ON the power line main disconnect switch C CONDENSER TEMPERATURE SENSOR The condenser temperature sensor probe located within the condenser fins air cooled version or in contact with the tube coil water cooled version detects the condenser tempera ture variations and signals them by supplying current at low voltage to the P C BOARD Incase the condensertemperature sensor detects a temperature at the condenser lower than 3 C 37 F that means ambient temperature too low for the correct unit operation the sensor signals to the P C BOARD to do not start up the unit till the ambient temperature rises to 10 C In the air cooled versions in relation to the different currenttransmitted the micro processor of the P C BOARD supplies through a TRIAC the power at high voltage to the fan motor E OPTICAL ICE LEVEL CONTROL Two on MFE 61 Model The electronic optical ice level control located into the ice chute one in each of the two ice chutes on MFE 61 model has the function to stop the operation of the ice machine when the light beam between the light source and the receiver gets interrupted by the flake ice which accumulates in the chute When the light beamis interrupted the RED LED located in the front of the P C BOARD goes off in case t
44. ing and masking tape as well as the plastic ice cube deflector which is not need being used with the SCOTSMAN Modular Cubers only 5 Remove the manufacturers registration card from the inside of the User Manual and fill in all parts including Model and Serial Number taken from the data plate Forward the completed self addressed registra tion card to SCOTSMAN EUROPE Frimont factory Storage bin B 1025 S B 1350 S 1 Follow the steps 1 2 and 3 above to unpack the storage bin 2 Lay carefully down the bin on its back to protect the finish and remove the bolts holding the shipping skid to the bin 3 Screw in the legs into the corresponding tapped holes in the bin bottom and tighten to seat the legs well against the bin bottom 4 Connectthe water drain line to the 1 female drain fitting located in the bottom of the bin CAUTIONS Avoid excessive tightening force when connecting to this fitting Do not apply excessive heat if any sweating ofthe fittings is necessary Heat conduction through the metal may melt the threads in the plastic drain 5 model 1350 S only insert the longer side of each plastic inspection window in the upper track of the corresponding opening and push it to force the window to enter into its seat KBT 1 10 Top Cover 1 Follow the steps 1 and 2 above to unpack the storage bin 3 a Cutandremove the plastic strip securing the carton box to the skid b Cut open
45. ion is usual Therefore it is important to apply on it an ample coating of Food grade Waterproof Grease before installing the breaker and cap hook in place 9 Slide off from the auger bottom the upper half of the water seal NOTE Any time the auger is removed for replacement or inspection use extra care in handling the water seal parts so no dirt or foreign matters are deposited on the surfaces of the seal If there is any doubt about the effectiveness of the water seal or O ring do not hesitate to REPLACE THEM 10 Unloose and remove the three four bolts which attach the freezer assy to the aluminium adaptor 11 Raise the freezer assy off the adaptor secure it out of the way to allow room to work On MF 22 30 using a suitable lenght and size wooden dowel or stick inserted through the top of the open freezer tap the lower half of the water seal and the lower bearing out the bottom of the freezer 12 On the superflaker models with two screwdrivers as a lever remove from the bottom of the freezer assy the lo bearing brass holding ring NOTE It is good practice to replace the water seal assy and both the top and the bottom bearings any time the auger is removed To facilitate this it is available a service Kit P N 001028 07 for MF 22 30 and P N 001028 08 for MF 41 51 MFE 61 which includes besides the above mentioned parts the ice breaker O ring and a tube of food grade waterproof grease
46. l MN AR VENTLAT ON 375 14 3 49 Dimensions HEIGHT less legs 690 mm HEIGHT with legs 705 mm WIDTH 535 mm DEPTH 660 mm WEIGHT 77 Kg MF 41 MACHINE SPECIFICATIONS Model Cond unit Finish Comp HP eis MF 41 AS Air 320 MF 41 WS Water S Steel 1 1800 Basic electr Amps Pon Watts HE Nr of wires Amps fuse 230 50 1 5 2 29 1200 26 3x 1 5 mm 16 15 C water temperature Page 8 SPECIFICATIONS ELECTRONIC MODULAR SUPERFLAKER ice making capacity ICE PRODUCED PER 24 HRS Mi AIR COOLED MODELS WATER TEMPERATURE AMBIENT TEMPERATURE MODEL MF 51 Important operating requirements Air temperature Water temperature Water pressur Electr voltage e MIN MAX 10 C 50 F 40 C 100 F 5 C 40 F 35 C 90 F 1 bar 14 psi 5 bars 70 psi variations from voltage rating specified on nameplate ICE PRODUCED PER 24 HRS 10 10 WATER COOLED MODELS Kg 600 WATER TEMPERATURE AMBIENT TEMPERATURE NOTE The daily ice making capacity is directly related to the condenser air inlet temperature water temperature and age of the machine To keep your SCOTSMAN FLAKER at peak performance levels periodic maintenance checks must be carried out as indicated on page 41 of this manual Page 9
47. m WIDTH 560 mm DEPTH 533 mm WEIGHT 49 Kg MF 22 MACHINE SPECIFICATIONS Model Cond unit Finish Comp HP 1 22 5 120 22 WS Water S Steel 3 8 480 Basic electr Amps Pod Watts Riu 5 Nr of wires Amps fuse 230 50 1 3 2 17 500 11 3x1 5 mm 10 A 15 C water temperature Page 4 SPECIFICATIONS ELECTRONIC MODULAR FLAKER MODEL MF 30 Important operating requirements MIN MAX Air temperature 10 C 50 F 40 C 100 F Water temperature 5 C 40 F 35 C 90 F 22 Water pressure 1 bar 14 psi 5 bars 70 psi Electr voltage 2 variations from voltage 22 rating specified 2 on nameplate 10 41096 AIR COOLED MODELS WATER COOLED MODELS m 9 g p g 21 B lt 180 c LLI a 32 8 160 38 8 z Q 140 5 a 2 e 120 5 ui 5 lt lt 32 27 21 15 10 C 10 C WATER TEMPERATURE WATER TEMPERATURE NOTE The daily ice making capacity is directly related to the condenser air inlet temperature water temperature and age of the machine To keep your SCOTSMAN FLAKER at peak performance levels periodic maintenance checks must be carried out as indicated on page 41 of this manual Page 5 SPECIFICATIONS 49 467 B 75 64 7187110 WATER OUTLET 71 WATER OUTLET WATER COOLED ONLY WATER NLET
48. ner contains Phosphoric and Hydroxyacetic acids These compounds are corrosive and may cause burns if swallowed DO NOT induce vomiting Give large amounts of water or milk Call Physician immediately In case of external contact flush with water KEEP OUT OF THE REACH OF CHILDREN 8 Pour the cleaning solution into the water reservoir 9 After 15 minutes switch ON the Master switch to start the unit 10 Waittill the machine starts to discharge ice then continue to slowly pour the cleaning solution into the water reservoir taking care to maintain the level just below the overflow NOTE The ice made with the cleaning solution is slushy and coloured also it may tend to loose fluidity creating some resistence in being elevated and extruded this situation can be heard by the noise made of the ice Should this occure it is recommended to stop for few minutes the ice machine in order to allow the ice in the freezer to partially melt then restart again 11 When all the cleaning solution has been used up open the water shutoff valve to allow new fresh water to flow into the reservoir Let the unit to continue to run until the ice resumes the normal colour and hardness 12 Stop the icemaker and pour warm water on the ice deposited into the storage bin to melt it up NOTE DO NOT use ice produced with the cleaning solution Be sure none remains in the bin 13 Pour into the water reservoir 1 cc
49. rigerant throughout the entire system Itcompresses the low pressure refrigerant vapor causing its temperature to rise and become high pressure hot vapor which isthen released through the discharge valve Page 30 ADJUSTMENT REMOVAL AND REPLACEMENT PROCEDURES NOTE Head the instructions thoroughly before performing any of the following adjustment or removal and replacement pro ceaure A ADJUSTEMENT OF THE EVAPORATOR WATER LEVEL The correct water level in the freezing cylinder is about 20 mm 1 below the ice discharge opening Low waterlevelcauses excessive strain inside the freezer assembly due to a faster freezing rate When the water level is above or below the correct one adjustment can be performed by raising or lowering at the measure required the water reservoir and its mounting bracket To Raise or Lower the water level a Loosen and remove the screw securing the mounting bracket of the water reservoir to the unit cabinet and raise the water reservoir to the correct level b Thread the mounting screw in the corresponding hole and tighten it WARNING Be sure the electrical power supply circuit breaker and the inlet water supply are OFF before starting any of the following Removal and Replacement procedures as a precaution to prevent possible personal injury or damage to the equipments B REPLACEMENT OF EVAPORATOR TEMPERATURE SENSOR 1 Remove the front
50. ring screw and remove the optical ice level control from the plastic ice chute 4 Toinstall the replacement optical ice level control follow the above steps in reverse E REPLACEMENT OF THE GEAR MOTOR MAGNETIC SENSOR 1 OnMF22 MF30 MF 41 and MF 51 remove the front top and side rear panels and on MFE 61 remove the front top and left side panels 2 Unloose the three screws securing the plastic cover to the top of the gear motor and remove it 3 Unloose the two screws securing the magnetic sensor to the plastic housing and withdraw it from its seat 4 Trace the gear motor magnetic sensor terminal plug on the rear side of the control box red with four terminal pins and draw it out from its socket by carefully slackening the fastening tie 5 To install the replacement gear motor magnetic sensor follow the above steps in reverse F REPLACEMENT OF THE WATER LEVEL SENSOR 1 Remove the front panel 2 Unloose the two nuts securing the wire leads to the two metal rods located on the water reservoir plastic cover 3 Trace the water level sensor terminal plug red color on the rear side of the control box and draw it out from its socket by carefully slackening the fastening tie 4 Toinstallthe replacement water level sensor follow the above steps in reverse G REPLACEMENT OF P C BOARD 1 Remove front top panel 2 Remove all sensor terminal plugs located on the rear side of P C Board by carefull
51. s to interrupt the light beam running between the two infrared lamps one or both on model MFE 61 the unit stops after six seconds with the simulteneous glowing of the YELLOW LED signalling the Full Bin situation NOTE The interruption of the light beam between the two light sensors is immediately signalled by the extinguishing of the RED LED located on the front of the P C Board After about 6 of steady interruption of the light beam the unit stops and the Full Bin YELLOW LED glows The six seconds of delay prevent the unit from stopping for any undue reason like the momentarily interruption of the light beam caused by the flakes that slides along the ice spout before dropping into the bin As some ice gets scooped out from the storage bin the light beam between the two sensors resumes and immediately the RED LED in the front center of the P C Board lights up six seconds later the ice machine restarts the ice making process and the YELLOW LED goes off This condenser temperature sensor when senses a rising of the condenser temperature beyond the pre fixed limit changes its electrical resistance and send alow voltage power flow to the MICRO PROCESSOR of the P C Board which energizes through a TRIAC the Fan Motor in ON OFF mode On the water cooled versions the refrigerant head pressure is kept at the constant value of 8 5 bar 120 psig on MF 22 and of 17 bar 240 psig on MF 30 MF 41 MF 51 and M
52. ses and reaches 62 C or 70 C according to the setting of DIP SWITCH number 8 the current arriving to the micro processor is such to cause an immediate and total stop of the machine operation NOTE To restart the unit after the shutoff caused by the hicondenser temperature it is necessary to push the RE SET button or to switch OFF and ON the power line main disconnect Switch D ELECTROMAGNETIC SENSOR Two on MFE 61 Model This safety device is housed on top of the Drive Motor one per each motor on MFE 61 model and detects based on Hall Effect principle the rotating speed and rotating direction of the drive Motor Should the rotating speed drop below 1300 r p m the magnitude measured by this device is such to signal to the microprocessor to stop the unit and light up the YELLOW LED The same reaction occures when the drive motor will tend to rotate in the wrong direction counterclockwise or when it doesn t rotate at all NOTE In the event of shortage of water in the reservoir or in case the water used is too soft de mineralized to cause greater resistence to the current flow electrical conductivity lower than 30 uS this sensor system causes the shutoff of the machine to protect it from running without water or with an inadequate water quality In this situation the YELLOW LED will glow to warn ofthe machine shutoff and the reason why NOTE To restart the unit after the shutoff caused by t
53. system to remove moisture and non condensables after compressor replacement Page 35 WIRING DIAGRAM MF 22 30 AIR AND WATER COOLED B WHITE SINGLE PHASE G GREY N BLACK A BLUE M BROWN GV YELLOW GREEN PRINTED CIRCUIT BOARD POWER ON BIN FULL T 100mA NO WATER FUSE TERMINAL BOARD COND 3 STAND BY WRONG ROTATION EVAP TEMP AUTOTRANSFORMER COMPRESSOR z 2 5 E 5 a gt ul gt oc 5 5 5 E 5 o 3 z lt cc 2 6 lt x o lt gt 5 5 E 8 2 5 o SENSORS 65 JUST FOR AIR COOLED UNIT USED ONLY UNIT AT 240 V Page 36 WIRING DIAGRAM MF 41 MF 51 AIR AND WATER COOLED SINGLE PHASE WHITE GREY BLACK BLUE BROWN YELLOW GREEN gt 5 lt 20 PRINTED CIRCUIT BOARD POWER ON BIN FULL T 100mA NO WATER FUSE 81 LED TOO COND 3 STAND BY WRONG ROTATION EVAP TEMP 16A FUSE E RESET TOO HI TEMP AUTOTRANSFORMER TERMINAL BOARD CONTACTOR Lena AI z gt a E gt gt a gt gt ra c u 5 oc 5 5 9 a t 5 e 5 gt cc 2 6 lt gt ra 6 a a o lt gt
54. t as possible The remaining key 8 is used to modify the CUT OUT condensing temperature from 70 C ON position for the air cooled versions to 62 C OFF position for the water cooled versions H INTERFACE P C BOARD Only on MFE 61 Model Used only on MFE 61 model it allows to elabo rate the signal received from both the electromagnetic sensors as well as from both the optical ice level controls transmitting it to the P C Board for the control of the unit operation The Interface P C Board is equipped by four INLET sockets two for the electromagnetic sensors and two for the optical ice level controls and two OUTLET plugs to be connected to the sockets of the main P C Board l FLOAT RESERVOIR The float reservoir consist of a plastic water pan on which is fitted a float valve with its setting screw The float valve modulate the incoming water flow to maintain a constant water level in the reservoir level that corresponds to the one in the freezing cylinder to ensure proper ice formation and fluidity On the inner side of the reservoir cover are fitted the two water level sensor pins which detects the presenceorthe shortage of water in the reservoir NOTE It is very important to make sure ofthe correct fitting of the cover on the reservoir in order to enable the sensor to efficiently control the water situation avoiding undue shutoff interventions J FREEZING CYLINDER or EVAPORATOR Two on MFE 61 Model
55. tch as detailed herebelow Page 14 1 Open all the way the lift door in the upright position then place the door catch on the front face of the ice maker and tape it in place 2 Drill two 3 mm holes in correspondance of the catch mounting holes 3 Remove the tape and fasten the catch using the two self tapping screws supplied D ELECTRICAL CONNECTIONS See data plate for current requirements to determine wire size to be used for electrical connections All SCOTSMAN icemakers require a solid earth wire All SCOTSMAN ice machines are supplied from the factory completely pre wired and require only electrical power connections to the wire cord provided at the rear of the unit Make sure that the ice machine is connected to its own circuit and individually fused see data plate for fuse size The maximum allowable voltage variation should not exceed 10 and 10 of the data plate rating Low voltage can cause faulty functioning and may be responsible for serious damage to the overload switch and motor windings NOTE All external wiring should conform to national state and local standards and regulations Check voltage on the line and the ice maker s data plate before connecting the unit E WATER SUPPLY AND DRAIN CONNECTIONS GENERAL When choosing the water supply for the ice flaker consideration should be given to a Length of run b Water clarity and purity c Adequate water supply pressure Sin
56. ter system Page 2 SPECIFICATIONS ELECTRONIC MODULAR FLAKER MODEL MF 22 Important operating requirements MIN MAX Air temperature 10 C 50 F 40 C 100 F Water temperature 5 C 40 F 35 C 90 F Water pressure 1 bar 14 psi 5 bars 70 psi 22 Electr voltage variations from voltage 22 rating specified nameplate 10 10 AIR COOLED MODELS WATER COOLED MODELS Kg C Kg C 120 pw 10 120 pA 10 2 115 21 115 110 21 110 x 105 E gt 105 32 lt 32 38 oa a 5 a 100 z a 100 z mm s m H Sa i 95 2 5 5 a a a 5 85 5 85 80 80 32 27 21 15 10 C 32 27 21 15 10 C WATER TEMPERATURE WATER TEMPERATURE NOTE The daily ice making capacity is directly related to the condenser air inlet temperature water temperature and age of the machine To keep your SCOTSMAN FLAKER at peak performance levels periodic maintenance checks must be carried out as indicated on page 41 of this manual Page 3 44 MN AR VENTILATION 350 13 3 42 B5 G 3 85 SPECIFICATIONS 467 B 25 64 718110 WATER OUTLET WATER OUTLET WATER COOLED ONLY WATER NLET COOLED DNLY 70 2 3 4 Dimensions 3 380 57 HEIGHT less legs 525 mm HEIGHT with legs 542 m
57. the top of the carton and remove the polystyre protection sheet C Pull out the KBT 1 10 Top Cover C LOCATION AND LEVELLING WARNING This Modular Flaker and Superflaker is designed for indoor installation only Extended periods of operation at temperature exceeding the following limitations will constitute misuseundertheterms ofthe SCOTSMAN Manufacturer s Limited Warranty resulting in LOSS of warranty coverage 1 Position the storage bin in the selected permanent location Criteria for selection of location include a Minimum room temperature 10 C 50 F and maximum room temperature 40 C 100 a Water inlet minimum 5 C 40 F and maximum 35 C 90 F c Well ventilated location for air cooled models clean the air cooled condenser at frequent intervals d Service access adequate space must be left for all service connections through the rear of the ice maker A minimum clearance of 15cm 6 must be left at the sides of the unit for routing cooling air drawn into and exhausted out of the compartment to maintain proper condensing operation of air cooled models Page 13 2 Levelthe Storage Bin Assy in both the left to right and front to rear directions by means of the adjustable legs 3 B 390 S and B 550 S Storage Bin inspect its top mounting gasket which should be flat with no wrinkles to provide a good sealing 8 the 1 10 Top Cover is installed on top of it 4
58. ton and remove the polystyre protection sheet d Pull out the polystyre posts from the corners and then remove the carton 4 Onmodels MF 22 MF 30 MF 41 and MF 1 remove the front top panel while on model MFE 61 remove top and sides panels of the unit and inspect for any concealed damage Notify carrier of your claim for the concealed damage as stated in step 2 above 5 Remove all internal support packing and masking tape 6 Check that refrigerant lines do not rub against or touch other lines or surfaces and that the fan blades move freely 7 Check that the compressor fits snugly onto all its mounting pads 8 See data plate on the rear side of the unit and check that local main voltage corresponds with the voltage specified on it CAUTION Incorrect voltage supplied to the icemaker will void your parts replacement program 9 Remove the manufacturers registration card from the inside of the User Manual and fill in all parts including Model and Serial Number taken from the data plate Forward the completed self addressed registra tion card to SCOTSMAN EUROPE Frimont factory Storage bin B 190 S B 390 S B 550 S 1 Follow the steps 1 2 and 3 above to unpack the storage bin 2 Unloosethetwo bolts and remove the protec tion plate from the drain fitting on model B 550 S 3 Carefully lay it down on its rear side and fit the four legs into their sockets 4 Remove all internal support pack
59. ual ice machine dataplate The refrigerant charges indicated are relatives to averages operating conditions OPERATING PRESSURES With 21 C ambient temperature Discharge pressure MF 22 Air cooled version 8 9 bar Water cooled version 8 5 bar Suction pressure 0 5 bar MF 30 41 51 MFE 61 17 18 bar 17 18 bar 17 bar 17 bar 2 5 bar 2 2 bar Page 26 COMPONENTS DESCRIPTION A EVAPORATOR TEMPERATURE SENSOR The evaporator sensor probe is inserted into its tube well which is welded on the evaporator outlet line it detects the temperature of the refrigerant on the way out from the evaporator and signals it by suppling a low voltage current flow to the P C Board According to the current received the micro processor let the ice maker to continue its operations or not In case the evaporating tem perature after 10 minutes from the unit start up does not go below 1 C 30 F the evaporator sensor signals to stop immediately the unit operation with the blinking of the 5th Warning YELLOW LED B WATER LEVEL SENSOR This sensor consists of two small stainless steel rods vertically fitted on the inner face of the reservoir cover and electrically connected to the low voltage circuit of the P C Board When the cover of the reservoir is positioned in its place the tips of both the rods dip into the reservoir water transmitting a low power current throu the same In the event the condenser temperature ri
60. y releasing them out from their sockets clips 3 Unplug the connector from the rear side of P C BOARD then unloose the four screws holding the same to the plastic control box and remove it 4 install the replacement P C BOARD follow the above steps on reverse H REPLACEMENT OF THE ICE SPOUT 1 Remove the front top panel 2 the wing nut and take off the ice chute from the ice spout paying attention to the optical ice level control Page 31 3 Slacken and remove the two straps that hold the polystyre insulations against the ice spout 4 Onthe model MF 22 30 unthread the S S spout from the brass casting while on the other models unscrew the two bolts securing it to the ice breaker 5 On model MF 22 30 unloose and remove the two screws and separate the spout casting from the freezer cylinder NOTE On model MF 22 30 inspect the spout gasket and replace it if torn cut or worn otherwise retain it to be used again 6 To install the replacement spout follow previous steps in reverse l REPLACEMENT OF THE AUGER WATER SEAL BEARINGS AND COUPLING 1 Remove the front top panel 2 Followthe steps atitem H to remove the ice spout 3 model MF 22 30 unloose and remove two screws and washers holding tight the spout bracket to the freezing cylinder On models MF 41 MF 51 and MFE 61 unloose andremove thefour bolts securing the ice breaker to the upper flange of the evapor
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