Scotsman Eiswürfelbereiter MC 1210
Contents
1. ATTENTION in case the ice cubes are cloudy white and have an acid taste melt them immediatelly by pouring on them some warm water This to prevent that somebody could use them 18 Wipe clean and rinse the inner surfaces of the storage bin REMEMBER To prevent the accumulation of undesirable bacteria it is necessary to sanitize the interior of the storage bin with an anti algae disinfectant solution every week FIG 8 EVAPORATOR o e N tc lt a tc lt o m s COMPRESSOR WATER DRAIN VALVE 0 WATER VALVE ELECTRONIC CARD2. Cubes too small Freezing cycle too short Capillary tube partially restricted Moisture in the system Shortage of refrigerant Review setting of DIP SWITCH keys Blow charge add new gas amp drier after evacuating systemwithvacuum pump Same as above Check for leaks amp recharge Cloudy cubes Shortage of water Dirty water supply Accumulated impurities See remedies for shortage of water Use water softner or water filter Use SCOTSMAN Ice Machine cleaner Shortage of water Water spilling out through curtain Water solenoid valve not opening Water leak in sump area Water flow control plugged Leak of water drain valve Check or replace curtain Replace valve Locate and repair Replace water inlet valve Replace valve 33 SERVICE DIAGNOSIS SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION Irregular cubes size amp some cloudy Some jets plugged Shortage of water Unit not level Spray bar not rotating Remove spray bar amp jet bearing and clean them See shortage of water Level as required Remove spray bar amp jet bearing and clean them Cubes too large Freezing cycle too long Inoperative evaporator sensor Review setting of DIP SWITCH keys Replace sensor Decreased ice capacity Inefficient compressor Leaky water valve Non condensable gas in system Poor air circulation or excessive hot location Red alarm LED glows Overc
3. m T B z 8 4 5 gt m a a a A d a Rh E m lt Z m 5 B 3 g 1 z n v XL XL Ze 7 59 z e e 2 EL a ou WIRING DIAGRAM AIR AND WATER COOLED 220 50 60 3 380 50 3 NO B3MDd NO H3MDd Tins ER Q TMN ER Q p WSL IH OD e dVA3 NO3 IH OOL i Q Jie M3dO SNIZ33NJ cr 59 9NIZ33NJ 1 59 SSVdAB 04 LIIN SSv4AB YO4 LIIN YILYM ONBAG QNQ23S AIAD HSNd SNUAG 080346 5 HSA OS JDA 9 229344 feng DJ 31313 BNZ33J Bend 235 lt BIA HShid 245 5 0 HShd 9NNV312 X04 LIIN UMYJ LNY SNNV312 137N XILYM QuVO8 UMU EIN 235 5 01 235 2 HShd ONYND 235 5 OL Jas 2 Page 30 31 B WHITE G GREY N BLACK A BLUE M BROWN GV YELLOW GREEN 380 60 3 wNWB31 0 BAIN ZN 6 Z UNA SDLOW g dy SYI AY NOLLANYSALNI 3SvHd 8055344
4. 3 min ON Exc i ON i 6 OFF aS EE Emm 15 min 13 OFF 1 min ON as T IL 13 min J WATER INLET SOLENOID VALVE 3 4 GAS MALE FITTING 2 per unit The water inlet solenoid valve is activated by the micro processor of the P C BOARD during the first 5 minutes of water filling phase and as well during the defrost cycle When energized it allows a metered amount of incoming water to flow overt he evaporator cavity to assist the hot gas in defrosting the ice cubes The water running over the evaporator cavity drops by gravity through the dribbler holes of the platen into the sump reservoir where it will be sucked by the water pump and primed to the spray system K HOT GAS SOLENOID VALVE 2 per unit The hot gas solenoid valve consists basically in two parts the valve body and the valve coil Located on the hot gas line this valve is energized through the micro processor of BOARD during the defrost cycle and as well during the water filling phase During the defrost cycle the hot gas valve coil is activated so to attract the hot gas valve piston in order to give way to the hot gas discharged from the compressor to flow directly into the evaporator serpentine to defrost the formed ice cubes L FAN MOTOR Alir cooled version The fan motor is controlled through the P C BOARD and the TRIAC by the condenser tem perature sensor Normally it operates only d
5. The periods and the procedures for maintenance and cleaning are given as guides and are not to be construed as absolute or invariable Cleaning especially will vary depending 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 Check that the icemaker is levelled side to side and in front to rear directions 3 Clean the water system evaporators bin and spray bar s 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 4 Reachthe water spray bar fromthe inside of the freezing chamber lifting it from its seat with its bottom race washer Dip it into a tray filled with cleaning solution then rinse it under a tap water stream With a pick clean the orifice of the water stream jet that propells the spray bar NOTE Cleaning requirements vary according to the local water conditions and individual user operation Continuous check of the clarity of ice cubes and visual inspection of the water spraying parts before and after cleaning will indicate frequency and procedure to be followed in l
6. on the rear side of the control box and remove it from its socket by carefully pulling outtheterminal plug securing clip 4 Toinstallthe replacement evaporator sensor follow the above steps in reverse C REPLACEMENT OF CONDENSER TEMPERATURE SENSOR BLACK PLUG 1 Remove front center 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 on the rear side of the control box and remove it fromits socket by carefully pulling outthe terminal plug securing clip 4 Toinstallthereplacementcondenser sensor follow the above steps in reverse D REPLACEMENT OF ICE LEVEL LIGHT CONTROL FOUR PINS BLACK PLUG 1 Remove the front center panel and front left or right panel according to the location of the ice level control 2 Trace the ice level light control terminal plug the only one with four terminal pins on the rear side of the control box and remove it from its socket by carefully pulling out the terminal plug securing clip 3 Remove the ice chute where is located the ice level light control assy and remove it from its metal bracket by unloosing the two securing Screws 4 Removethe PVC plastic plug from unit base then with traw the entire ice level light control cable and terminal plug th
7. surface and move freely M REPLACEMENT OF SPRAY BAR 1 Remove the front right or left side panel and then the plastic ice chute 2 Reach through the ice opening and feel for the spray bar 3 Rotate spray bar so that one of its end is aligned with ice opening 4 Grabthe spray bar center and lift it up off the jet bearing hub together with its race washer then draw it out through the ice opening 5 To install the replacement spray bar follow above steps in reverse REPLACEMENT OF DRIER 1 Remove the center front panel 2 cooled version unloose the screws securing the condenser to unit frame 3 Recover the refrigerant fromthe system and transfer it in a bottle so to reclaim or recycle it 4 Unsolder the refrigerant lines from the two ends of the drier 5 To install the replacement drier remove factory seals and solder the refrigerant lines taking precautions to NOT OVERH EAT the drier body 6 Thoroughly evacuate the system to remove moisture and non condensable after drier replacement 7 Charge the system with refrigerant R 404A by weight see data plate of machine and check for leaks 8 Replace panels previously removed O REPLACEMENT OF HOT GAS VALVE BODY 1 Followthe steps in procedures J to remove the hot gas valve coil 2 Recover the refrigerant from the system and transfer It in a bottle so to reclaim or recycle it 3 Unsolder the refrigerant lines from
8. ELECTRONIC CARD 16 PRINCIPLE OF OPERATION How it works In the SCOTSMAN Modular Cubers MC 1210 the water used to make the ice is kept constantly in circulation by an electric water pumps one for each evaporator which primes it to the nozzles of the self propeller spray bar from where it is diverted into the inverted mold cups of the evaporator Fig B Asmall quantity of the sprayed water freezes into ice the rest of it cascades by gravity into the sump assembly below for recirculation FREEZING CYCLE Fig A The hot refrigerant gas 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 due to the heat exchanging action it looses some ofits heatcontent so thatits pressure and temperature are lowered as well Next the refrigerant enters into the evaporator serpentine which has a larger 1 0 then the capillary and starts to boil off this reaction is emphasized by the heat transferred by the sprayed water The refrigerant then increases in volume and changes entirely into vapor The vapor refrigerant then passes through the suction accumulator used to prevent that any small amount of liquid refrigerant may reach the compressor and through the suction line In both the accumulator and the suction line itexchanges heat with the refri
9. compressor head and suction pressures BIN TEMPERATURE SENSORS DATA PROCESSOR COMPRESSOR WATER DRAIN VALVE FAN MOTOR mmm m WATER PUMP N E 22 ELECTRONIC CARD 12 NOTE On air cooled models the condensing pressures in both the refrigerant systems are controlled by two different pressure controls set between 13 and 14 bar 180 195 psig the right side and between 13 5 and 14 5 bar 190 205 psig the left side In the water cooled models the discharge pressure is kept constant at the value of 14 bars 195 psig by means of two water regulating valves located on the water supply line to the condensers In case of condenser clogging such to prevent the proper flow of the cooling air or in case the fan motor is out of operation or shortage of water in the water cooled condenser 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 3 After having diagnosed the reason of the rise of temperature and removed its cause it is necessary to unplug wait few seconds and plug in again the unit thus to put the machine in condition to initiate a new freezing cycle The machine restarts with the usual 5 minutes water filling phase in order to provide enough water into the s
10. lower 4 1677 66 1 32 SPECIFICATIONS 17 210 6 11 16 8 17 64 125 24 19164 740 29 9 84 CUBE CHUTE EXITS BOTTON 500 628 24 23 32 20 21 32 WATER INLET WATER COOLED ONLY 3 4 WATER OUTLET WATER COOLED ONLY 3 7 8 OVERFLOW DRAN SET an ACCESSORIES WATER NLET 3 4 GAS KSC 1210 Cube stacking kit DIMENSIONS HEIGHT WIDTH DEPTH WEIGHT MC 1210 MACHINE SPECIFICATIONS 810 mm 1677 mm 775 mm 234 Kgs Model Cond unit Finish Comp HP Water req 1 24 HR MC 1210 AS Air Stainless steel 2x25 1240 MC 1210 WS Water Stainless steel 6000 Basic Start Electric power cons Model elect Amps amps Watts Kwh x 24 HR N of wires Amps fuse MC 1210 AS 2 MC 1210 WS 400 50 34N 11 28 4800 105 5 x 2 5 m m 16 With water at 15 Cubes per harvest MCL 288 large MCM 408 medium MCS 792 small 5 GENERAL INFORMATION AND INSTALLATION A INTRODUCTION This manual provides the specifications and the step by step procedures for the installation start up and operation maintenance and cleaning for the SCOTSM
11. the round hole provided into the base of the Electronic Modular Cuber Upper unit 9 Connect the electric plug of the ice level control cable to the Cable Extension then plug in this one into its P C BOARD socket 10 Rotate clockwise the TRIMMER setting screw located in the front of BOARD to its Page 7 maximum power so to compensate the greater resistence caused by the Cable Extension addition 11 Stick with accuracy the rubber stripe onto the upper edge of the front panel of the lower unit in order to fill the air gap between the two machines 12 Place again in their position the two ice chutes and finally re fit all the service panels previously removed 8 Electronic units installation 1 Unloose the screws and remove the top panels 2 Put the second Electronic Modular Cuber onto the bottom one and aligne the two cabinets correctly 3 Remove the ice chutes from both the systems 1 of the units and insert through the ice discharge openings of the upper unit the plastic reinforced Ice Chute Connections 4 Disconnect the ice level control terminal plug from the P C Board of the upper Electronic Modular Cuber now colled unit 2 ATTENTION The P C Boards to be connected to the interface must be of the same supplier If not the machines do not work and stop at BIN FULL LED 5 Secure the two interface P C Board to the contactor metal bracket of the lower unit
12. 4002 ZN STOLINO OD aavan 7 DZH 3A V GONSI0S 7 3ATVA 9105 ZN W E s m SHOSN3S o T E SBOSN3S a a EE n m 8 n m 1 v o lt a uU o lt 8 El a E m g B z 9 E P 2 a 5 d a a m A s A lt A m 9 B 3 B i T 56 5 5 oll M Wap ee XL XL o y zr1E 7 s 9 z e e oy n Zu 9u 91 WIRING DIAGRAM AIR AND WATER COOLED NO B3MDd NO N3MDd Tins ER amp Ti ER r 8 8 dvA3 UNO3 IH ODL i e dVA3 0NO3 IH OOL SNIZ33NJ SI Q SNZ33NJ e LIIN lt 40 LIIN S3 VM INYANA QNO336 amp AJAD ANOIS HAAG NOISN3AN YOJA JDA ONZZ3uJ NOISX3JAN MOS 31243 9 239304 ONION 255 S 8340 HSA 235 5 tHAU HSA 12 LIIN 08 112842 31NSd ONNV313 X04 LIIN YALVM 255 5 01 23S ZHSMd ONYND 255 5 OL 245 2 Quvog UNYI SERVICE DIAGNOSIS Page 32 SYMPTOM POSSIBLE C
13. AN MODULAR CUBER 1210 The Electronic Modular Cubers of the MC 1210 series 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 This product qualifies for the following listings amp y 69 These icemakers have been engineered to our own rigid safety and performance standards The VDE SEV WRC seals signify that they are listed with them and that they comply with the materials and manufacturing standard of them These seals also signify that these icemaker models have been inspected and tested by VDE SEV WRC inspectors who reserve the right to periodically examine production icemakers at the factory to assure continued compliance 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 MC 1210 Modular Cubers do not have their own attached ice storage bin it is necessary to use the Bin B 120 B UNPACKING AND INSPECTION Modular Cuber 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 reported to the delivering carrier and a concealed damage claim form filled in subjet to inspection of the contents with the carrier s represen
14. AUSE SUGGESTED CORRECTION Unit will not run No warning LEDS glows Green LED Power ON glows Bin full LED glows Red alarm LED glows Red alarm LED blinks Freezing LED Red alarm LED glow Freezing LED Red alarm LED blink Blown power in fuse in P C Board Main switch in OFF position Inoperative P C Board Loose electrical connections Blown power out fuse in P C Board Inoperative ice level control Inoperative P C Board High head pressure High evaporating temperature after 15 mins beginning freeze Condenser sensor out of order Evaporator sensor out of order Replace fuse amp check for cause of blown fuse Turn switch to ON position Replace P C Board Check wiring Replace fuse amp check for cause of blown fuse Clean or replace ice level control Replace P C Board Dirty condenser Clean Inoperative fan motor Replace Shortage of water WC Hot gas valve leak Replace it Water inlet valve leak Replace it Short of refrigerant Compressor cycles intermittently Replace it Replace it Compressor cycles intermittently Low voltage Contactor with burnt contacts Non condensable gas in system Compressor starting device with loose wires Mechanical problem Check circuit for overloading Check voltage at the supply to the building If low contact the power company Replace it Purge the system Check for loose wires in starting device Replace compressor
15. G HARVEST CYCLE Push for more then 5 during the Freezing cycle the machine goes immediately into Harvest Push for more then 5 during the Harvest cycle ine machina enters immediately in the Freezing cycle The length of Harvest is equal to 35 if Push Button is activated before 15 C evaporating temperature LED activation As per Harvest cycle chart if Push Button is activated after 15 C evaporating temperature LED activation Red LED inside PC Board ON steady Page 21 with ten keys of one push button ofinputterminals for the leads of the sensor probes and 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 three sensors in order to control the operation of the different electrical components of the ice maker compressor water pump solenoid valves etc FREEZING CYCLE TOO HI COND TEMP TOO HI EVAP TEMP BIN FULL POWER F LED MEANING GREEN LED ON Unit under power YELLOW BIN FULL LED ON Unit shut OFF at storage bin full YELLOW BIN FULL LED BLINKING Infrared beam break out Page 22 RED ALARM LED ON Too hi condensing temperature RED ALARM LED BLINKING Too hi evaporating temperature YELLOW FREEZING CYCLE ON Unit in freezing cycle mode YELLOW FREEZING LED AND RED ALARM LED ON Condenser sensor out of order YELLOW FREEZI
16. Ios CONDENSER NEN OF ELECTR E O TIMER a o E RX mO COMPRESSOR WATER DRAIN VALVE CONTACTOR COIL ER 1 TOR ELECTRONIC CARD 8 With the system in Cleaning mode the water pump is the only component in operation to circulate the cleaning solution in the entire water system 9 Letthe unit remain in the cleaning mode for about 20 minutes then turn the main switch to OFF disconnect unit from POWER 10 Flush out the cleaning solution from the sump reservoirs then pour onto each evaporator cavity two or three liters of clean potable water with a capfull of antibacteria solution to rinse and sanitize the mold cups and the platen If necessary remove the water spry bar to clean it separately as per steps 3 and 4 of paragraph B 11 Give power to the unit by the main switch 12 During the Water Filling Phase push RESET BUTTON for more then 2 but less then 5 the machine enter in Rinsing Mode Fig 7 13 Letthe unit remain in the RINSING MODE mode for about 10 minutes then turn the main switch to OFF disconnect unit from POWER Page 36 14 Flush outthe rinsing solution from the sump reservoirs 15 Place again the evaporator cover and the unit service panels 16 Give POWER to the unit 17 At completion of the freezing and harvest cycle make sure of proper texture and clearness of the ice cubes and that they do not have any acid taste
17. NG LED AND RED ALARM LED BLINKING Evaporator sensor out of order G DIP SWITCH The P C BOARD which controls the entire operation of the ice maker has a DIP SWITCH with ten switching keys which allow to set up the micro processor program in order to extend orto shorten the length of freezing cycle in relation to the different model and versions of ice machines The DIP SWITCH first four keys setting determines the length of the 2nd phase of freezing cycle controlled by the electronic timer as detailed in the table B TheDIP SWITCH keys 5 amp 6setting determines the length of the defrost cycle according to the size of the cubes Large or Medium as per the following setting ON ON PROGRAM A ON OFF PROGRAM B OFF OFF PROGRAM C OFF ON PROGRAM D LENGTH OF HARVEST CYCLE ACCORDING TO THE TIME TO DROP THE EVAP TEMPERATURE FROM 0 TO 15 C DIP SWITCH N 7 and 8 allow the extention of the length of the harvest defrost cycle according to their combination as per following chart DIP SWITCH ADDITIONAL DEFROST TIME 7 8 ON ON 0 OFF ON 30 ON OFF 60 OFF OFF 90 The 9th key is used to supply power to the water pump for the first 15 seconds of the defrost cycle position OFF or for the first 30 seconds position ON The 10th key is used to modify the CUT OUT condensing temperature from 70 C 160 F for the air cooled versions ON position to 60 C 140 F OFF p
18. SCOTSMAN SERVICE MANUAL MC 1210 R 404 A VERSION Electronic modular cubers TABLE OF CONTENTS Table of contents Specifications MC 1210 GENERAL INFORMATION AND INSTALLATION Introduction Unpacking and Inspection Modular cuber Unpacking and Inspection Storage bin Location and levelling Stacking installation Mixed units installation Electronic units installation Electrical connections Water supply and drain connections Final check list Installation practice OPERATING INSTRUCTIONS Start up Operational checks OPERATING PRINCIPLES How it works Freezing cycle Defrost or Harvest cycle Operation Control sequence Operation Electrical sequence Component description ADJUSTMENT REMOVAL AND REPLACEMENT PROCEDURES Adjustment of the cube size Remplacement of evaporator temperature sensor Remplacement of condenser temperature sensor Remplacement of ice level light control Remplacement of P C Board Remplacement of the water pump Remplacement of water inlet solenoid valve Removal of the flow control Remplacement of hot gas valve coil Remplacement of water drain solenoid valve Remplacement of water drain electronic timer Remplacement of fan motor Remplacement of spray bar Remplacement of drier Remplacement of hot gas valve body Remplacement of evaporator platen Remplacement of air cooled condenser Remplacement of water cooled condenser Replacement of water regulating valve water cooled models R
19. d for proper sump drainage Water drain Water cooled models Connect the 3 4 male fitting of the condenser water drain utilizing a second flexible tubing or a 3 8 O D copper tubing to the open trapped and vented drain 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 15 cm 6 clearance around the unit for proper air circulation 3 the storage bin and the unit in 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 10 6 Has the water supply pressure been checked to ensure a water pressure of at least 1 bar 14 psi 7 Check all refrigerant lines and conduit lines to guard against vibrations and possible failure 8 Havethe bolts holding the compressor down been checked to ensure that the compressor is snugly fitted onto the mounting pads 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 bee
20. d masking tape as well as the plastic ice cube deflector 5 Remove the manufacturer s 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 registration card to Frimont factory 6 C LOCATION AND LEVELLING WARNING This Ice Cuber is designed for indoor installation only Extended periods of operation at temperature exceeding the following limitations will constitute misuse under the terms of the SCOTSMAN Manufacturer s Limited Warranty resulting in LOSS of warranty coverage 1 Position the 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 b Water inlet temperatures minimum 5 C 35 F and maximum 90 C 100 F c Well ventilated location for air cooled models Clean the air cooled condenser at frequent intervals d Service access adequate space mustbe left for all service connections through the rear of the ice maker A minimum clearance of 15 cm 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 2 Levelthe Storage Bin Assy in both the left to right and front to rear directions by means of the adjustable legs 3 Inspect
21. d phase in relation with the different DIP SWITCH keys settings FIG 2 o o e z wn oc P ELECTR lt a TIMER a o a er LH m o s o P o o WATER DRAIN VALVE ELECTRONIC CARD 13 WATER DRAIN VALVE 2 EVAPORATOR CONDENSER ae ELECTR E TIMER 5 45 m a COMPRESSOR ELECTRONIC CARD WATER DRAIN VALVE EVAPORATOR E WATER IN VALVE ELECTR TIMER E 56 m a COMPRESSOR ELECTRONIC CARD 14 G After about 17 20 minutes from the beginning of the freezing cycle in an hypothetic ambient temperature of 21 C the defrost cycle takes place with the hot gas and the water inlet valves being simoultaneously activated Fig 5 The electrical components in operation are COMPRESSOR WATER PUMPS WATER INLET SOLENOID VALVES HOT GAS VALVES WATER DRAIN SOLENOID VALVES for the first 15 20 seconds NOTE The length of the defrost cycle is automatically determinated by the micro processor of the P C BOARD in relation of the time necessary for the unit to reduce the evaporator temperature from 0 C 32 F small Red LED blinking to 15 C 5 F small Red LED ON steady TIME T2 Itis possible to
22. e from the sump tank By doing so it allows to the ice maker to make every new freezing cycle with new fresh water avoiding thereby the accumulation of sediments and scales which soon or later will cause the or total clogging of the water system on the unit Q CURRENT RELAY Connected in series to the 3 phase compressor trips off the compressor contactor when the current of one of the three phases is more then Voltage Current 230 50 3 8 Amps 230 60 3 9 Amps 400 50 3 6 Amps 24 ADJUSTMENT REMOVAL AND REPLACEMENT PROCEDURES A ADJUSTMENT OF THE CUBE SIZE CAUTION Before performing actual adjustment of the cube size check other possible causes for cube size problems refer to the Service Diagnosis Section for problem review and analysis Do not perform any adjustment till the icemaking system has progressed through several complete freezing and harvest cycle to observe size and quality of ice cubes and whether or not the cube size problem exists l Ifthe cubes are shallow size Indentation is too deep probably the length of the second phase of the freezing cycle is too short so to extend such length you have to 1 Locate the DIP SWITCH on the front of the P C Board 2 Take note of thecombination of the first four DIP SWITCH KEYS and check the corrisponding length of freezing cycle 2nd phase on Table B 3 Change the same DIP SWITCH KEYS setting so t
23. e cup molds The total length of the freezing cycle ranges from 20 to 25 minutes DEFROST OR HARVEST CYCLE Fig C As the electronic timer has carried the system throughout the second phase of freezing cycle the defrost cycle starts ATTENTION In case the unit be able to reach 0 C 32 F evaporating temperature within 15 minutes but after 45 minutes from the beginning of the freezing cycle it has not yet reached the evaporator tem perature of 15 C 5 F the machine goes straight into the defrost cycle omitting the timed portion of the freezing cycle relied to the setting of the first four DIP SWITCHES NOTE The length of the defrost cycle is automatically determinated by the micro processor of the P C BOARD in relation of the time necessary for the unit to reduce the evaporator temperature from 0 C 32 F small Red LED blinking to 15 C 5 F small Red LED ON steady TIME T2 Itis possible to extend the length of the defrost cycle by changing the setting of DIP SWITCH 7 and 8 as shown on table at page 22 The electrical components in operation during this phase are COMPRESSOR WATER PUMPS WATER INLET SOLENOID VALVES HOT GAS SOLENOID VALVES WATER DRAIN SOLENOID VALVES for the first 15 20 seconds The incoming water passing through the water inlet valve and the flow control runs over the evaporator platen and then flows by gravity through the dribbler holes down into the sump re
24. e rear of the modular cuber 2 Remove the rear center panel and disconnect the electrical leads from the solenoid valve 3 Unscrew the two screws securing the inlet solenoid valve to the cabinet 4 Removethe corbin clamps and plastic hose the valve is now free 5 To install the replacement water inlet solenoid valve follow the above steps in reverse 26 REMOVE THE FLOW CONTROL 1 Remove the rear center panel 2 Locate theplastic hose connecting the water inlet solenoid valve to the copper water line going to the top of the evaporator chamber 3 _Unloose the two clamps securing the copper tube as well as the flow control to the plastic hose and withdraw the copper tube 4 By means of a 4 MA screw withdraw the flow control assy from the inside of plastic hose REPLACEMENT OF THE HOT GAS VALVE COIL 1 Remove the front and the top center panel 2 Remove the hardware securing the hot gas valve coil its body 3 Trace the electric wires beloging to the hot gas valve coil and disconnect them then lift the valve coil from the valve body 4 Toinstall the replacement hot gas valve coil follow previous steps in reverse J REPLACEMENT OF WATER DRAIN SOLENOID VALVE 1 Remove the rear panel 2 Trace and disconnect the electrical leads from the water drain solenoid valve coil 3 Remove the corbin clamps and the plastic hoses from the valve 4 Unloose the screws securing the val
25. eplacement of compressor Liquid charging Wiring diagram Service diagnosis MAINTENANCE AND CLEANING INSTRUCTIONS General Icemaker Cleaning instructions of water system Page 2 3 SPECIFICATIONS ELECTRONIC CUBER MODEL MC 1210 R 404 Important operating requirements MIN MAX ee Air temperature 10 C 50 F 40 100 Beas Water temperature 5 C 40 C 35 C 90 F Bee Water pressure 1 bar 14 psi 5 bars 70 psi Bee Electr voltage variations 222222 from voltage rati rom voltage rating 22 specified on nameplate 10 10 Zee AIR COOLED MODELS WATER COOLED MODELS Kg C Kg 650 10 700 0 600 4 650 B 2 550 600 5 a 500 o 550 x 9 a 32 9 450 Q 500 a en 400 38 450 350 400 32 27 21 15 10 32 27 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 MODULAR CUBER at peak performance levels periodic maintenance checks must be carried out as indicated on page 35 of this manual Production charts shown are indicating the production of MCM models For MCS models ice production is approx 10 lower while for MCL models ice production is approx 5
26. eps in reverse NOTE Thoroughly evacuate the system to remove moisture and non condensables after condenser replacement S REPLACEMENT OF WATER REGULATING VALVE WATER COOLED MODELS 1 Remove the rear central panel 2 Close the shut off valve on the water supply line and disconnect it at the rear of the cuber 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 Always install a replacement drier whenever the sealed refrigeration system is open Do not replace the drier until all other repairs or replacements have been completed 7 To install the replacement evaporator 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 T REPLACEMENT OF COMPRESSOR 1 Remove the front center panel as well as the rear one 2 Unloosethe screws securing the air cooled condenser to unit frame and open it to gain access to the compress
27. extend the length of the defrost cycle by changing the setting of DIPSWITCH 7 and 8 as shown on table at page 22 H Check during the defrost cycle that the incoming water flows correctly into sump reservoir in order to refill it and that the surplus overflows through the overflow drain tube l Check the texture of ice cubes just released They have to be in the right shape with a small depression of about 5 6 mm in their crown If not wait for the completion of the second cycle before performing any adjustment If required the length of the timed freezing cycle can be modified by changing the DIP SWITCH keys setting as illustrated in OPERATING PRINCIPLE If the ice cubes are shallow and cloudy it is possible that the ice maker runs short of water during the freezing cycle second phase or the quality of the supplied water requires the use of an appropriate water filter or conditioner J be sure of the correct operation of ice level control device place some ice cubes between its sensing eyes to interrupt the light beam The Bin Full YELLOW LED starts to blink and after 60 seconds the unit stops with the simultaneous glowing of the same LED to moni tor the BIN FULL situation Fig 6 Remove ice cubes from the ice level control sensors to allow the resumption of the light beam After approximately 6 seconds the ice maker resume its operation with the immediate glowing of the FIRST YELLOW LED indicati
28. gerant flowing into the capillary tube warmer before to be sucked in the compressor and to be recirculated as high pressure high temperature gas Thefreezing cycle is controlled by the evaporator temperature sensor which has its probein contact with the evaporator serpentine that determines the length of the cycle first portion When the temperature of the evaporator serpentine drops to a pre set value the evaporator sensor probe changes its electrical resistance allowing a low voltage current 8 10 volts to flow to the P C BOARD which in turn activates an electronic timer The timer which is built in the P C BOARD takes over from the evaporator temperature sensor the control of the freezing cycle up to its completion NOTE The change ofthe electric potential of the evaporator sensor with the consequent activation of the timer Time mode is signalled by the glowing up of the RED LED located beside the FREEZING yellow one in the front of the P C BOARD ATTENTION In case after 15 minutes from the beginning of the freezing cycle the temperature of the evaporator sensor probe is higher then 0 C 32 F shortage of refrigerant inoperative hot gas valve etc the BOARD switch OFF immediately the unit with the simultaneous blinking of the WARNING RED LED The length of this second portion of the freezing cycle is pre fixed and related to the setting of the first four DIP SWITCH keys which i
29. harge of refrigerant Capillary tube partially restricted Hot gas solenoid valve leaking Short of refrigerant Discharge head pressure too high Replace Repair or replace Purge the system Relocate the unit or provide for more ventilation Correct the charge Purge off slowly Blow charge add new gas amp drier after evacuating system with vacuum pump Replace valve Charge to data plate indication See incorrect discharge pressure Poor harvest Restriction in incoming water line Water inlet valve not opening Hot gas valve orifice restricted Clogged air vented holes in mold cups Discharge head pressure too low Check water valve strainer and flow control If necessary enlarge the flow control orifice Valve coil with open winding Replace valve Replace hot gas valve assy Clean out holes plugged See incorrect discharge pressure Unit won t harvest Inoperative P C Board Hot gas valve not opening Water solenoid valve not opening Replace P C Board Valve coil with open winding Replace valve Valve coil with open winding Replace valve Incorrect discharge pressure Inoperative condenser sensor Inoperative P C Board Water regulating valve misadjusted Replace sensor Replace P C Board Adjust its setting stem Excessive water in unit base Water tubing leaking Check Tighten or replace 34 MAINTENANCE AND CLEANING INSTRUCTIONS A GENERAL
30. hat it will correspond to the combination on table B preceding the one remarked at step 2 This will allow an extension of the freezing cycle of two more minutes 4 Observe the ice cubes in the next two harvests and eventually repeat steps 2 and 3 above until proper ice cubes size is achieved See figure ll Ifthe cubes are oversize size Indentation is too full probably the length of the second phase of the freezing cycle is too long To shorten such length you have to 1 Locate the DIP SWITCH on the front of the P C Board 2 Take note of the combination of the first four DIP SWITCH KEYS and check the corrisponding length of freezing cycle 2nd phase on Table B 3 Change the same DIP SWITCH KEYS setting so thatit will correspond to the combination on table B coming next to the one remarked at step 2 This will reduce an the freezing cycle length of two minutes SMALL IDENTATION NORMAL SIZE SHAPE LITTLE OR NO ICE IN CENTER OF CUBES SS SHALLOW SIZE THICK BULGE SOLID ICE OVER SIZE 4 Observe the ice cubes in the next two harvests and eventually repeat steps 2 and 3 above until proper ice cubes size is achieved See figure B REPLACEMENT OF EVAPORATOR TEMPERATURE SENSOR BLUE PLUG 1 Remove front center panel as well as the two top sides ones 2 Remove the evaporator insulation and disconnect the sensor probe from the serpentine 3 Trace the evaporator sensor terminal plug
31. is constant maintained during the freeze cycle by the water regulating valve at 14 bars 195 psig However suction pressure and compressor amps will still decline as the machine freezes ice Freeze Cycle Average Discharge Pressure A C Right System Left System 13 14 bar 180 195 psig 13 5 14 5 bar 190 205 psig Average Discharge Pressure W C 14 bars 195 psig Suction Pressure End Freeze Cycle 2 5 bar 35 psig REFRIGERANT CHARGE R 404 Air Cooled Version 2 x 1200 gr 2 x 42 oz Water Cooled Version 2 x 700 gr 2 x 24 5 oz NOTE Before charging the refrigerant system always check the type of refrigerant and quantity as specified on the individual ice machine dataplate The refrigerant charges indicated are related to average operating conditions WARNING As R 404ais a bland of different types of refrigerants it is imperative to charge the system only in liquid phase in order to avoid to alter their mix up percentage COMPONENTS DESCRIPTION A EVAPORATOR TEMPERATURE SENSOR The evaporator temperature sensor probe located in contact with the evaporator serpentine detects the dropping of the evaporator tempera ture during the freezing cycle and signals it by supplying a current flow to the micro processor of P C BOARD According to the current received the evaporator sensor supplies power to the P C BOARD first when it reachs 0 C 32 F second at 15 C 5 F inth
32. is second case it supply power to the electronic timer built into the BOARD so that it may take control of the fength of the 2nd phase of freezing cycle The length of the timed phase is pre f ixed by the setting of the keys 1 2 3 and 4 of the DIP SWITCH The activation of the electronic timer 15 C 5 F is monitored by the lighting up of the RED LED placed in the front of the P C BOARD This lighting up occures usually in the mid period of the freezing cycle and signals the switching from the first to the second phase of the freezing cycle NOTE Whenever after 15 minutes from the beginning of the freezing cycle the evaporating temperature have not yet reached the value of 0 C 32 F the P C BOARD switches OFF the machine with the BLINKING of RED LED B 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 In case the condenser temperature rises and reaches 70 1 60 F on air cooled models or 62 C 145 F on water cooled models the current arriving to the micro processor is such to cause an immediate andtotal stop of the machine operation C ICE BIN LEVEL LIGHT CONTROL The electronic ice bin level control located into the storage bin ha
33. l as the ambient temperature sensor probe 3 Removethe screws attaching the condenser to the unit frame 4 Recover the refrigerant from the system and transfer it in a bottle so to reclaim or recycle it 5 Unsolder the refrigerant lines from the condenser and remove it from the unit NOTE Always install a replacement drier whenever the sealed refrigeration system is open Do not replace the drier until all other repairs or replacements have been completed 6 To install the replacement condenser follow the above steps in reverse NOTE Thoroughly evacuate the system to remove moisture and non condensables after condenser replacement R REPLACEMENT OF WATER COOLED CONDENSER 1 Remove front central panel 28 2 Remove the condenser and the ambient temperature sensor probes from condenser 3 Remove bolts which secure the condenser to the unit base 4 Remove the 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 Always install a 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 st
34. led by two pressure controls air cooled version or it is kept constant at 14 bars 195 psig by means of the water regulating valve water cooled version NOTE On this model the condenser sensors are used just to switch off the unit in case the condensing temperature rise up to more then 7T C for air cooled version or more then 62 C for water cooled version for one of the following abnormal reasons CLOGGED CONDENSER Air cooled version FAN MOTOR OUT OF OPERATION Air cooled version INSUFFICIENT FLOW OF COOLING WATER Water cooled version AMBIENT TEMPERATURE HIGHER THEN 40 C 100 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 condenser hi temperature to restart the machine just switching OFF and ON the unit at main line switch The ice machine resumes its normal operation by going through the 5 minutes water filling phase At the start of the freezing cycle the refrigerant suction or lo pressure lowers rapidly to 4 4 bars 60 psig then it declines gradually in relation with the growing of the ice thickness to reach at the end of the cycle approx 2 5 bar 35 psig with the cubes fully formed in th
35. n 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 male fitting Power line Main switch Drain fitting Vented drain Drain fitting Vented drain Open trapped vented drain O 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 90 F 11 OPERATING INSTRUCTIONS START UP After having correctly installed the ice maker and completed the plumbing and electrical connections perform the following Start up procedure A Give power to the unit to start it up by switching ON the power line main disconnect switch NOTE Every time the unit returns under power after having been switched off both the water inlet valve the hot gas valve get energized for a period of 5 minutes thus to admit new water to the machine sump reservoir to fill it up and eventually to wash off any dirt that can have deposited in it during the
36. ng UNIT IN OPERATION and the extinguishing of the BIN FULL YELLOW LED ELECTR e o e 70 cc i DATA PROCESSOR COMPRESSOR WATER DRAIN VALVE ee WATER IN VALVE ELECTRONIC CARD NOTE The ICE LEVEL CONTROL INFRARED SYSTEM is independent from 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 due to negative affection of the light detertor it is advisable to locate the unit where it is not reached by any direct light beam or light radiation also itis recommended to keep the bin door constantly closed and to follow the instructions for the periodical cleaning of the light sensor elements as detailed in the MAINTENANCE AND CLEANING PROCEDURES Page 15 K Remove the refrigerant service gauges if fitted and re fit the unit service panels previously removed L Instruct the owner user on the general operation of the ice machine and about the cleaning and care it requires Nur NA EVAPORATOR Z eae CONDENSER ELECTR TIMER BIN TEMPERATURE SENSORS DATA PROCESSOR COMPRESSOR DIP WATER DRAIN VALVE HOT GAS VALVE _ gt O CONTACTOR COIL
37. ng cycle 2nd phase the system goes automatically into the defrost cycle which also has a pre fixed length that can slightly change in relation to the ambient tempe rature as shown in Atcompletion ofthe defrostcyclethe P C BOARD commands the unit to start again a new freezing cycle OPERATION ELECTRICAL SEQUENCE The following charts illustrate which switches and which components are ON or OFF during a particular phase of the icemaking cycle Refer to the wiring diagram for a reference Remember the wiring diagram shows the unit as itis in the Timed Freeze Cycle BEGINNIING FREEZE Electrical components Loads OFF Compressor mens irm ic Fan Motor Air cooled only and TRIAC Hot Gas Valves Inlet Water Valves P C Board Relay 1 Coil P C Board Relay 2 amp 3 s Water Pumps Contactor Coil Electronic Timer Electronic Controls amp Sensors Evaporator Sensor Condenser Sensor Ice Level Control TIMED FREEZE Electrical components Loads Fan Motor Air cooled only TRIAC Hot Gas Valves Inlet Water Valves P C Board Relay 1 C
38. now called unit 1 by means of the supplied plastic clamp 6 Disconnect the ice level control terminal plug from the P C Board of the unit 1 and connected it to the INLET socket of the Interface P C Board shorter wire 7 Connect the primary OUTLET terminal plug of the Interface P C Board wire of medium lenght to the P C Board socket of the unit 1 8 Connect the secondary OUTLET plug longer wire of the interface P C Board to the P C Board socket of the unit 2 see drawing 9 Turn clockwise to its max power the TRIMMER setting screw located on the front center of P C Board ofthe ice level control ofthe unit 2 NOTE Hepeat steps from 3 to 9 for the Systems 2 of the units 10 The interface P C Board is now ready to stop simultaneously the operation of the two units when the infrared beam of the ice level control is interrumped by the stored ice cubes ATTENTION After removal of the ice cubes tp re establish the infrared beam bothunits resumetheir operation starting from the beginning of freezing cycle During the first freezing cycle it could be possible that the ice cubes produced by one of the two ice makers be not of the correct shape cloudy and shallow due to an insufficient water level in its sump tank This minor problem will desappear in the next batch because in the coming harvest cycle the sump tank will be properly filled up 11 Stick with accuracy the rubber
39. o the control box and to the evaporator 2 Waittillthe end of defrost cycle then turn the unit OFF by the main switch disconnect power supply 3 Prepare for each freezing chamber 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 WARNING The SCOTSMAN Ice Machine Cleaner 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 immediatelly In case of external contact flush with water KEEP OUT OF THE REACH OF CHILDREN 4 Scoop out all the ice cubes stored into the bin in order to prevent them from being contaminated with the cleaning solution then flush out the water from the sump reservoir by bending down the vertical sump drain hose 5 Remove the evaporator cover then slowly pour onto the evaporator piaten the cleaning solution With the help of a brush dissolve the most resistant and remote scale deposits in the platen Perform the same for all the four evaporators 6 Give power to the unit by the main switch 7 Duringthe Water Filling Phase push RESET BUTTON for more then 2 but less then 5 the machine enter in Cleaning Mode Fig 7 FREEZING CYCLE TOO HI COND TEMP TOO HI EVAP TEMP BIN FULL EVAPORATOR 5m Z O 2L 4
40. ocal areas 5 With the ice machine and fan motor OFF on air cooled models clean condenser using vacuum cleaner whisk broom or non metallic brush taking care to do not damage both the condenser and ambient temperature sensor probes 6 Check for water leaks and tighten drain line connections Pour water down through the storage bin drain line to be sure that drain line is open and clear 7 Check size condition and texture of ice cubes Perform adjustment of DIP SWITCH keys as required 8 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 one minutes This should cause the ice maker to shut off and the light up of the 2nd LED yellow light IMPORTANT Perform the above check only at the end of harvest cycle or at the beginning of freezing cycle in order to do not cause to the unit to make a double freezing cycle NOTE Within few seconds after the removal ofthe hand from the Infrared sensing light the icemaker restarts in freezing cycle The ice level control uses devices that sense light therefore they must be kept clean enough so they can see Every month clean wipe the sensing eyes with a clean soft cloth 1 9 Check for refrigerant leaks 5 C CLEANING INSTRUCTIONS OF WATER SYSTEM 1 Remove left center and right front panels to gain access either t
41. of a two plastic reinforced Ice Chute Connections b two Interface P C Boards c two Extension Cables enabling to cover any stacking installation combination as a When stacking an Electronic Modular Cuber on an Electromechanical type Earlier series b When stacking two Electronic Modular Cubers c When stacking two different Electronic Modular Cubers twin P C Boards version with the previous single one Mixed units installation 1 the screws and remove the top panels 2 Trace and remove from the top of the evaporators of Electronic Cuber the metal brackets to be used to secure the ice level controls inside the storage bin 3 Liftalittle bit the Modular Cuber front side in order to be able to mount the ice level control bracket 4 Putthe Electronic Modular Cuber on top of the Electromechanical unit 5 Remove the ice chutes from both the units and insert through the ice discharge openings of the upper unit the plastic reinforced Ice Chute Connections 6 Disconnect the ice level control terminal plug from the P C BOARDS of Electronic Modu lar Cuber 7 Install and secure the ice level controls on their brackets by means ofthe two screws supplied with the unit 8 Direct each ice level control cable first to pass through the ice discharge opening of the bottom machine with the protective sheath correctly located in correspondance of this opening and then to pass through
42. oil P C Board Relay 2 amp 3 Coil Water Pumps Contactor Coil Electronic Timer Electronic Controls amp Sensors Evaporator Sensor Condenser Sensor Ice Level Control HARVEST Electrical components Loads erem 1 Fan Motor Air cooled only and TRIAC Hot Gas Inlet Water Valves P C Board Relay 1 amp 2 Coil P C Board Relay Coil Water Contactor Coil Electronic Timer Electronic Controls amp Sensors Evaporator Sensor Condenser Sensor Ice Level Control Page 19 7 dd u ds 20 OPERATING CHARACTERISTICS On air cooled models during the freezing cycle the discharge pressures are kept between 13 and 14 bar 180 195 psig in the right system and between 13 5 and 14 5 bar 190 205 psig in the left one by two separate pressure controls and at the same time the suction pressure will gradually decline reaching its lowest point just before harvest Compressor amps experience a similar drop On water cooled the discharge pressure
43. or compartment 3 Remove the cover and disconnect the electrical leads from the compressor junction box 4 Recover the refrigerant from the system and transfer it in a bottle so to reclaim or recycle it 5 Unsolder and disconnect both the suction line and the discharge line from the compressor 6 Remove the four compressor mounting bolts and the compressor from the unit base NOTE Always install a replacement drier whenever the sealed refrigeration system is open Do not replace the drier until all other repairs or replacements have been completed 7 Toinstallthereplacementcompressorfollow the above steps in reverse NOTE Thoroughly evacuate the system to remove moisture and non condensables after compressor replacement 29 LIQUID CHARGING Because R 404 is a near azeotrope only liquid refrigerant can be used to recharge the refrigeration system To do that may take some special techniques 1 Use an electronic scale to measure the charge 2 Place a drum or cylinder of R 404A on the scale valves side up R 404A disposable cylinders have an internal dip tube and dispense liquid refrigerant from the walve when itis upright 3 A refrigeration manifold should be attached to the service access valves Attach the charging hose to the cylinder of R 404A Openthe cylinder s valve and purge the hose to the manifold 4 Open the discharge side manifold valve and weigh in
44. osition for the water cooled versions H WATER SPRAY SYSTEM Through its nozzles the water pumped is sprayed in each individual cup to be frozen into ice It consists of one spray tube wheve are located several spray nozzles l WATER PUMP The water pump operates continually throughout the freezing cycle and on the first 15 or 30 LENGTH PROGRAMS seconds of the defrost cycle so to such the HARVEST remaining water from the sump tank reach in CYCLE A B mineral salts and drain it out 180 Upto 6 30 on Up to 9 30 XXXX During the freezing cycle the pump primes the 165 6 30 7 Up to 3 9307 10 XXXX water from the sump to the spray system and 150 7 8 3 315 10 11 XXXX through the spray nozzles sprays it into the 135 8 9 315 930 11 17 inverted cup molds to be frozen into crystal clear 120 9 1030 330 430 12 1330 lt 3 ice cubes 105 10904400 4 30 6 1930 15 4 4 Itis recommended that the pump motor bearings 90 12 gt 15 gt 4 be checked at least every six months LENGTH OF TIMED PORTION OF FREEZING CYCLE ACCORDING TO THE DIP SWITCH SETTING COMBINATIONS 1 2 3 4 1 2 3 4 ON mmm EE n Va EE onmi 11 min ON BERG 2 Eu L 5 23 4 9 min x ON 3 e mr umm imi 10 On mmu 7 min ON GA e umm 5 5 amp mE m 17 min 12 em md
45. rough the hole in the unit base 5 To install the replacement ice level light control follow the above steps in reverse Page 25 NOTE Slip in the ice level control cable in the center of the plastic plug so to avoid any sort of contact with the unit frame E REPLACEMENT OF P C BOARD 1 Remove front center panel 2 Remove all sensor terminal plugs located on the rear side of P C Board by carefully releasing them out from their sockets clips 3 Disconnect the terminal board connection plug 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 To install the replacement P C BOARD follow the above steps on reverse F REPLACEMENT OF THE WATER PUMP 1 Remove left or right front panels 2 Locate the water pump in the front left corner of the evaporator chamber 3 Remove the plastic ice chute and through the ice discharge opening trace the plastic hose and disconnect it from the port of the pump body 4 Unloose the screw and the yellow green ground wire Trace the pump electrical wire leads and disconnect them 5 Remove the two screws securing the pump to sump tank 6 Pull out the pump assy from sump 7 To install the replacement pump follow the above steps in reverse G REPLACEMENT OF WATER INLET SOLENOID VALVE 1 Close the shut off valve on the water supply line and disconnect it from the water inlet fitting at th
46. s listed above Low water pressure below 1 bar may cause malfunction of the ice maker unit Water containing excessive minerals will tend to produce cloudy coloured ice cubes plus scale build up on parts of the water system Water supply Connect the 3 4 GAS male fitting of the solenoid water inlet valve using an approved food grade flexible tube or a 3 8 O D copper pipe 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 Page 9 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 sprayed for making the ice cubes and the other for the water cooled condenser Connect the 3 4 GAS male fitting of the water inlet using flexible tubing or a 3 8 O D copper pipe 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 1 0 which runs to an open trapped and vented drain When the drain is a long run allow 3 cm pitch per meter 1 4 pitch per foot Aventat the unit drain connection is also require
47. s made in relation with the different unit version In Table B are indicated the various lengths of the second portion of freezing cycle Time mode in relation to the different combinations of the DIP SWITCH KEYS In Table A herebelow are illustrated the DIP SWITCH keys combinations for the different unit versions as they are set in the factory DIP SWITCH FACTORY SETTING COMBINATIONS PER MODEL AND VERSION FREEZING CYCLE DEFROSTCYcLE PEAR CYCLE ware DIP SWITCH 1 2 3 5 6 7 8 9 10 MCM 1210 ON ON ON ON MCM 1210 W OFF ON OFF ON ON MCL 1210 A ON ON ON OFF ON OFF ON ON ON ON MCL 1210 W ON ON ON OFF 17 EVAPORATOR HOT GAS VALVE CONDENSER Tape eee EVAPORATOR HOT GAS VALVE CONDENSER EVAPORATOR OVERFLOW DRAIN LINE EVAPORATOR i OVERFLOW DRAIN LINE 18 The electrical components in operation during the freezing cycle are COMPRESSOR FAN MOTOR in air cooled version WATER PUMPS CONTACTOR COIL and during the second phase of freezing cycle Time mode they are joined by the ELECTRONIC TIMER The refrigerant head pressure in the course of the freezing cycle ranges between 13 and 14 bars 180 195 psig the right side and between 13 5 and 14 5 bar 190 205 psig the left side being control
48. s the function to stop the operation ofthe ice machine when the light beam between the light source and the sensor is interrupted by the ice cubes stored into the bin When the light beam is interrupted the Bin Full YELLOW LED starts to blink in case the light beam is constantly interrupted for more than 60 seconds the ice machine stops with the glowing up of the Bin Full YELLOW LED to monitor the situation of ice bin full The 60 seconds of delay prevent that an ice scoop movement or the ice dropping through the ice chute interrupting for a while the light beam can stop the operation of the unit Six seconds after the scoop out of the ice with the resumption of the light beam between the two infrared sensor of ice level control the ice machine restarts again with the extinguishing of the YELLOW LED D P C BOARD Data processor 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 integrated with two fuses one on power in 82mA and one on power out 6 3 A of four aligned LEDS monitoring the operation of the machine of one extra monitoring RED LED blink 0 C steady 15 C of one DIP SWITCH E PUSH BUTTON OPERATION DURING WATER FILLING PHASE Push for more then 2 but less then 5 the machine enters in Cleaning Mode Push for more then 5 the machine by pass the Water Filling Phase DURING FREEZIN
49. servoir Fig D The water filling the sump reservoir forces part of the surplus water from the previous freezing cycle to go out to the waste through the overflow pipe This overflow limits the level of the sump water which will be used to produce the next batch of ice cubes Meanwhile the high pressure high temperature refrigerant discharged from the compressor flows through the hot gas valve directly into the evaporator serpentine by passing the condenser The hot gas circulating into the serpentine of the evaporator warms up the copper molds causing the defrost of the ice cubes The ice cubes released from the cups drop by gravity onto a slanted cube chute then through a curtained opening they fall into the storage bin At the end of the defrost cycle both the hot gas and the water inlet valves close so the machine initiates another cycle OPERATION CONTROL SEQUENCE At the start of the freezing cycle the evaporator temperature sensor controls the length of the first part of the freezing cycle As it reaches a predetermined temperature it supplies a low voltage current to the P C BOARD in order to activate the electronic timer which takes over the control of the freezing cycle for a pre fixed time according to the DIP SWITCH keys setting see Tab NOTE The evaporator temperature sensor factory pre set is the same for all the models and is not adjustable in the field Once completed the freezi
50. stripe onto the upper edge of the front panel of the lower unit in order to fill the air gap between the two machines 12 Place again in their position the two ice chutes and finally re fit the service panels previously removed 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 cuber consideration should be give to a Length of run b Water clarity and purity c Adequate water supply pressure Since water isthe mostimportant single ingredient in producting ice you cannot emphasize too much the three item
51. tative present 3 Cutandremove the plastic strip securing the carton box to the skid b Remove the packing nails securing the carton box to the skid c Cutopen the top of the carton and remove the polystyre protection sheet d Pull out the polystyre posts from the corners and then remove the carton 4 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 and the hardware package 6 Check that refrigerant lines do not rub against or touch other lines or surfaces and that the fan blade moveS 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 manufacturer s 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 registration card to Frimont factory Storage bin B 120 1 Follow the steps 1 2 above to unpack the storage bin 2 Carefully lay it down on its rear side and fit the four legs into their sockets 3 Remove all internal support packing an
52. the Storage Bin top mounting gasket which should be flat with no wrinkles to provide agood sealing when the Modular Cuberis installed on top of it 4 Place the Modular Cuber on top of Storage bin using care not to wrinkle or tear the gasket 5 Liftalittle bit the Modular Cuber right side in order to be able to mount in one of the two ice chute openings the ice level control bracket 6 Remove the PVC plastic plug closing the round hole located beside the ice chute opening 7 Trace the ice level control assy secured for the transport on top of the evaporator of the Modular Cuber and direct it down through the unplugged round hole into the Storage Bin 8 Secure the ice level control assy on its bracket by means of the two screws found in the hardware package supplied with the unit 9 Make a cut shear in the PVC plastic plug that goes from its edge to the center insert the ice level control cable in the center of the plastic plug so to prevent it from any sort of contact with the unit frame then place again the PVC plug in the round hole keeping the cable exceeding portion inside the unit 10 Install the two plastic ice cube deflector by hooking them on the flange of the ice chute openings in unit base see illustration D STACKING INSTALLATION A Stacking Kit KSC 1210 is available as an accessory on request to allow the installation of two Modular Cubers one on top of the other The Stacking Kit is consisting
53. the hot gas valve body and remove it from the unit NOTE Always install a replacement drier whenever the sealed refrigeration systern is open Do not replace the drier until all other repairs or replacements have been completed 4 To install the replacement hot gas valve body follow the above steps in reverse NOTE Thoroughly evacuate the system to remove moisture and non condensables after hot gas valve replacement P REPLACEMENT OF EVAPORATOR PLATEN 1 Remove top and rear panels 2 Remove the plastic cover from the upper part of the evaporator platen Page 27 3 Recover the refrigerant from the system and transfer it in a bottle so to reclaim or recycle it 4 Unsolder and disconnect the capillary tube and hot gas line from one serpentine of evaporator and the suction discharge line from the other serpentine 5 Lift the evaporator platen assembly out of its seat NOTE Always install a replacement drier whenever the sealed refrigeration system is open Do not replace the drier untll all other repairs or replacements have been completed 6 Toinstallthe replacement evaporator follow the above steps in reverse NOTE Thoroughly evacuate the system to remove moisture and noncondensables after evaporator replacement Q REPLACEMENT OF AIR COOLED CONDENSER 1 Remove front central panels 2 Remove from the condenser fins the condenser sensor probe as wel
54. the name plate charge After the charge is weighed in wait afew minutes and recheck the scale 5 If all of the refrigerant charge has not been weighed into the discharge side it must be carefully added thru the low side Close the discharge side manifold valve 6 Withasightglass orcharge faster inthe hose to the low side port start the ice machine 7 Crack open the low side manifold valve and watch the scale and sight glass Open and close the low side manifold valve to flow liquid into the manifold but flasf off to vapor before it enters the suction side of the refrigerant system This should only be a few ounces at most 8 After the scale the correct charge shut off the valve on the refrigerant cylinder 9 Remove the refrigerant manifold gages 10 Replace and tighten all caps B WHITE G GREY N BLACK A BLUE M BROWN GV YELLOW GREEN ONVOB ZoN Z UNN SDLOW NYA SYI 3A TWA GON310S 09 05 0ZZ 1300 NOJ S32v1d38 NOLLISNNOD XANH ZN AV738 NOLLGNYSSLNI 3SvHd NOSS3MdAOJ Hid Z N 033002 isnt 9 STOMLNO OD anvan 2 DZH 7 NINOS NVAO ZN W N 5 SHOSN3S Su sNas n o e n m 4 e 3 2 E m d
55. ump tank E Check to see through the ice discharge opening that the self propelled spray bar is correctly rotating and that the water jets evenly reach the interior of the inverted mold cups also make sure that there is not excessive water spilling out through the opening F Theicemaking process takes place thereby with the water sprayed into the molds that gets gradually refrigerated by the heat exchange with the refrigerant flowing into the evaporator serpentine During the freezing process when the evaporator temperature falls below an established value to the evaporator temperature sensor supplies a low voltage power signal to the electronic control device P C BOARD in order to activate an electronic timer This one takes over the control of the freezing cycle up to the complete formation of the ice cubes Fig 4 NOTE The length of the entire freezing cycle is governed by the evaporator temperature sensor which has its brobe placed in contact with the evaporator serpentine Not adjustable in combination with the electronic timer Adjustable incorporated in the P C BOARD The timer adjustment is factory set in consideration of the cooling version and of the ice cube size Small Medium Large It is possible however to modify the timed length of the freezing cycle by changing the DIP SWITCH keys setting In Table B of PRINCIPLE OF OPERATION are shown the various time extensions of the freezing cycle secon
56. unit off period Fig 1 B During the water filling operation check to see that the incoming water dribbles through the evaporator platen dribbler holes down into the sump reservoir to fill it up and also that the incoming surplus of water flows out through the overflow pipe into the drain line During the water filling phase the components energized are WATER INLET SOLENOID VALVES HOT GAS SOLENOID VALVES WATER DRAIN SOLENOID VALVES for the first 15 20 seconds NOTE f in the 5 minutes length of the water filling phase the machine sump reservoir does not get filled with water up to the rim of the overflow pipe it is advisable to check 1 The water pressure of the water supply line that must be atleast 1 bar 14 psig Minimum Max 5 bar 70 psig 2 The filtering device installed in the water line that may reduce the water pressure below the Minimum value of 1 bar 14 psig 3 Any clogging situation in the water circuit like the inlet water strainer and or the flow control C At completion of the water filling phase 5 minutes the unit passes automatically into the freezing cycle with the start up of COMPRESSOR WATER PUMPS FAN MOTOR in air cooled version controlled by the condensing temperature sensor located within the condenser fins Fig 2 OPERATIONAL CHECKS D Install if necessary the refrigerant service gauges on both the high side and low side Schr der valves to check the
57. uring the freezing cycle to draw cooling air through the condenser fins In the second part of the freezing cycle the fan motor can run at intermittance as the condenser pressure must be kept between two corresponding head pressure values 13 14 bars 180 195 psig M COMPRESSOR The hermetic compressor is the heart of the refrigerant system and it is used to circulate and retrieve the refrigerant throughout the entire system Page 23 It compresses the low pressure refrigerant vapor causing its temperature to rise and become high pressure hot vapor whichis then released through the discharge valve N WATER REGULATING VALVE Water cooled version This valve controls the head pressure in the refrigerant system by regulating the flow of water going to the condenser As pressure increases the water regulating val ve opens to increase the flow of cooling water O CONTACTOR Placed outside of the control box it is controlled by the P C BOARD in order to close or open the electrical circuit to the compressor P WATER DRAIN SOLENOID VALVE The water drain solenoid valve electrically connected in parallel to the water inlet and to the hot gas solenoid valves is energized for all the length of the defrost cycle By means of the water pump that remains energized for 30 seconds at the beginning of the defrostcycle itallows the drain outof all remaining water rich of minerals deposited during the previous freezing cycl
58. ve to the unit base and remove it 5 To install the replacement water drain solenoid valve follow the above steps in reverse NOTE When installing the new valve pay attention to the water flow direction K REPLACEMENT OR THE WATER DRAIN ELECTRONIC TIMER 1 Remove the front panel 2 Unscrew the terminal wires holders of the electronic timer and disconnect the wires 3 Remove by pulling out its holding ring the electronic timer from its bracket 4 To install the replacement electronic timer follow previous steps in reverse NOTE Adjust the electronic timer knob in order that all remaing water from previous freezing cycle be totally pumped out from the sump tank L REPLACEMENT OF FAN MOTOR 1 Remove the front panel 2 Unloose the screws securing the air cooled condenser to the unit frame and open it to gain the access to the fan motor 3 Remove screws and yellow green ground wire Trace the electrical leads of fan motor and disconnect them 4 Remove the bolts securing the fan motor protection grid to the condenser shroud then remove the fan motor assembly 5 With an appropriate allen wrench unsoolse the screw securing the fan blade to the fan motor shaft then unloose the nuts holding the fan motor to its protecting grid 6 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
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