ELECTRONIC MODULAR CUBER MODEL MC 16 short
Contents
1. MIN FOR UTILITY 5 900000000 YG 657 HEIGHT WIDTH DEPTH WEIGHT 765 30 1 8 16 short MACHINE SPECIFICATIONS DIMENSIONS 710 mm 28 765 mm 30 1 8 600 mm 23 5 8 75 Kgs 165 Ibs Model Cond unit Finish Comp HP Water req 1 24 HR MC 16 short AS Air Stainless steel 15 380 MC 16 short WS Water Stainless steel i 500 Starts Electric power cons Basic electr Amps ane Watts Kwh x 24 HR N of wires Amps fuse 230 50 1 7 1 32 1450 27 6 3 x 1 5 m m 20 400 50 3 3 18 28 5 x 1 5 m m Cubes per harvest MCL 8 72 large 8 102 medium MCS 8 198 small At 32 C 90 F ambient 21 70 F water temperature 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 cle2. Important operating requirements MIN MAX Air temperature 10 C 50 F 40 100 F Water temperature 5 40 35 90 Water pressure 1 bar 14 psi 5 bars 70 psi Electr voltage variations from voltage rating specified on nameplate 10 10 It AIR COOLED MODELS WATER COOLED MODELS Kg B Kg B 170 15 174 P 168 166 172 10 155 170 162 160 168 158 21 32 156 166 154 152 164 38 150 uj 148 162 146 tc oc I 144 I 160 P lt 142 E lt S 140 5 E 158 138 LL 156 LU a 136 n a 134 32 Q 154 132 o gt 130 gt 152 128 Q 1 1 124 Qt m 122 38 120 lt 2 us 118 116 144 114 112 142 s 140 108 7 106 104 196 102 136 100 98 134 32 27 21 15 10 C 32 27 21 15 10 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 maintenance section of this manual Production charts shown are indicating the production of MCM and MCL models For MCS models ice production is approx 1096 lower Page 4 SPECIFICATIONS 600 152 Q3 5 8 67
3. e 2 e pue 1 a Iur JIN su md L x4 D i 69 i IM ZM B si 1 3 u iix ZOL E IE E i Na Na na a 199 N 8 z z HM 9 re Qr or s NI m GYVO8 LINONIO O3lNlMd Z 4318 5 It XA 5 4 5 pp a 4185 jz v NOD 001 59 ion Oe 1 4 85 x z z P P Z nouns Hsnd NOLLVERdO 9NZ3384 59 TADS HM 5 28555 2 lt e AIR COOLED MODEL 27 WIRING DIAGRAM AIR AND WATER COOLED 400 50 3 BROWN BLUE GREY BN BU GREEN YELLOW GREEN RED GNYE GN RD YE YELLOW WHITE WH
4. OPERATING CHARACTERISTICS Freeze Cycle Average Discharge Pressure A C Average Discharge Pressure W C Suction Pressure End Freeze Cycle 15 17 bars 220 245 psig 17 bars 245 psig 1 7 bar 24 psig REFRIGERANT METERING DEVICE capillary tube REFRIGERANT CHARGE R 404 A Water cooled 450 gr 15 88 02 Air cooled MC 16 580 gr 20 45 oz 19 COMPONENTS DESCRIPTION A GREEN MASTER SWITCH PUSH BUTTON Located in the front of the machine it s used to switch ON and OFF the unit by pushing its green push button When ON its green light is ON as well B RED ALARM RE SET PUSH BUTTON Located in the front of the machine just beside the Master Switch it works in conjuction with the Cleaning Remind Board and it s activated when Consensing temperature is higher then 70 C air cooled version ON steady with machine in OFF mode Consensing temperature is higher then 60 C water cooled version ON steady with machine in OFF mode ON STEADY Condenser sensor out of order Blinking twice and repeat with machine in OFF mode Condenser air filter need to be cleaned steady with machine in ON mode Water system need to be cleaned Slow blinking with machine in ON mode On the first two cases it s possible to Re Set the operation of the machine pushing and hold the Red Alarm Re Set Button by 5 till the Red Light is OFF On the third case it
5. 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 FREEZING CYCLE TOO HI COND TEMP TOO HI EVAP TEMP BIN FULL H 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 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 FREEZING LED AND RED ALARM LED BLINKING Evaporator sensor out of order Page 22 EN STATUS REASON WHY ONSTEADY UNIT UNDER POWER ONSTEADY FREEZING CYCLE 60 MINUTES DELAY AT START UP BLINKING JUMPER J3 OUT TOO HI DISCHARGE PRESSURE TEMP TOO EVAP TEMP gt 0C AFTER 15 FROM START UP ON STEADY BLINKING ON STEADY UNIT OFF AT BIN FULL BLINKING SLOW BLINKING IIR ON AFTER TRIP OFF AT FAST BIN FULL IR BEAM CUTTED ON STEADY CALIBRATION DONE UNIT IN CLEANING MODE OR TRIPPING BLINKING OFF AFTER TEST JUMPER TEST IN CONDENSER SENSOR OUT ON STEADY OF ORDER EVAPORATOR SENSOR OUT BLINKING OF ORDER BLINKING ALTERNATIVELY
6. I R SENSOR OUT OF ORDER PUSH 5 DURING WATER FILLING TO MOVE THE UNIT INTO FREEZING PUSH gt 5 DURING FREEZING TO MOVE THE UNIT INTO DEFROST PUSH 5 DURING DEFROST TO MOVE THE UNIT INTO FREEZING PUSH 2 gt 5 DURING WATER FILLING TO MOVE THE UNIT INTO CLEANING PUSH DURING THE 60 MIN START UP DELAY TIME TO BY PASS IT I 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 or to shorten the length of freezing cycle in relation tothe 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 6 setting determines the length of the defrost cycle according to the Page 23 time to drop the evaporating temperature from 0 C to 15 C as per the following setting ON ON PROGRAM A ON OFF PROGRAM B OFF OFF PROGRAM OFF ON PROGRAM D LENGTH OF HARVEST CYCLE ACCORDING TO THE TIME TO DROP THE EVAP TEMPERATURE FROM 0 C TO 15 C LENGTH PROGRAMS HARVEST CYCLE A B C D 180 6 30 Up to 9 30 XXXX 165 6 30 7 Up to 3 9 30 10 XXXX 150 T 8 3 315 10 17 XXXX 135 9 9 215 930 117 12 XXXX 120 9 10 30 330 437 12 1330 lt 3 105 10 30 12 4 30 6 13
7. ORANGE PINK 06 BK YOLOW INVA INVA INVA YOSNIS YOSNIS YOSNIS ualvM JOUVHOSIC L3INI HILYM SV9 LOH Tins NI8 dWAL dial 3 Ts i N 2 8 K4 gt 69 N qIAA LAA ZAA 13 E B l 2 lg 75 291 28 A Na Qi 2 2 YOSSIYANOI a 02 0 F 1 01 s 3 no 2n an f f135 gt GI 3 6603 DE I I I XI L 1185 LN 5 Gi we wand WS z z 0409 NIYA GIINIYd 09 wo ma cl uH 69 al ws RINVII 00L 59 NOLLNA HSNd NOLVEBdO 9NZ33 50 TADS n8 Na yO x Na 0 754250 gt BLACK A9 dx A9 SERVICE DIAGNOSIS Page 28 SYMPTOM POSSIBLE CAUSE SUGGESTED CORRECTION Unit will not run No warning LEDS glows Green LED Power ON glows Bin full LED glows Red alarm LED LIGHT glows Red alarm LED blinks Freezing LED Red alarm LED glows and Red alarm Light blinks twice and repeat Freezing LED Red alarm LED blinks 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 Inoper
8. 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 related to the length of the second phase of freezing cycle T2 Time to drop the evaporating temperature from 0 32 F small Red LED blinking to 15 C 5 F small Red LED ON steady 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 19 The electrical components in operation during this phase are COMPRESSOR WATER INLET VALVE HOT GAS VALVE WATER DRAIN VALVE and the WATER PUMP on the first 30 seconds only 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 reservoir Fig D The water filling the sump reservoir forces part of the surplus water from the previous freezing cycle to go outto 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 refrigerant as hot gas discharged from the compressor flows through the hot gas valve directly into the e
9. 30 15 2 4 90 gt 12 6 15 gt SWITCH N 7 8 allow the extention of the length ofthe 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 WATER PUMP OFF 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 position for the water cooled versions L CONDENSER AIR FILTER Air cooled version Located in front of the air cooled condenser can be removed by withdrawing it through the opening of the front panel for cleaning or replacing A lower plastic guide installed inside the unit is used for the correct sliding and location of the air filter M WATER SPRAY SYSTEM Throughits nozzles the water pumped is sprayed in each individual cup to be frozen into ice consists of one spray tube wheve are located several spray nozzles N WATER PUMP The water pump operates continually throughout the freezing cycle and on the first 30 seconds ofthe defrost cycle so to such the remaining water from the sump tank reach in mineral salts and drain it out During the freezing cycle the pump primes the w
10. Out Water Pump Jump IN on EC series 3 or 60 minutes delay time at first start up 3 minutes in all new AC Series TEST In case the TEST contacts are closed with the Jumper at the Start Up of the machine the PC Board energizes all the electrical components for maximum 3 minutes time 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 At the end of the 3 minutes the PC Board switch OFF the entire machine with the blinking of all the LED s as shown on the bottom drawing EC SERIES 0 OR 60 MINUTES DELAY 6 12 MONTHS TEST ON STEADY 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 FREEZING HARVEST CYCLE Push for more then 5 during the Freezing cycle the machine goes immediately into Harvest e Push for more then 5 during the Harvest cycle the machine enters immediately in the Freezing cycle The length of Harvest is equal to
11. b Push and hold the PC Board Push Button c Switch ON the machine at Green Light Master Switch d Keep pushed the PC Board Push Button till the Leds of the PC Board start blink e Release the PC Board Push Button NOTE The setting of the Ice Level Control Sensivity must be done any time a new PC Board is installed in the machine m D EVAPORATOR ELECTR TIMER TEMPERATURE SENSORS lt WATER DRAIN VALVE 5 WATER IN VALVE ELECTRONIC CARD 21 F 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 32 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 steady 15 C of one DIP SWITCH with ten keys of one push button of input terminals for the At restart from any tripping OFF at Bin Full the new PC Board assures 45 seconds water filling phase soto refill the water sump upto the maximum level In case of malfunction of the Optical Ice Level Control thenew PC Board switch ON alternativelt the Yellow and Red Led continuously On the PC Board there are four jumpers to select e 6or 12 months remind time for the water system cleaning Operation of the Purge
12. overflow pipe into the drain line During the water filling phase the components energized are THE WATER INLET SOLENOID VALVE THE HOT GAS SOLENOID VALVE THE WATER DRAIN SOLENOID VALVE NOTE If in the 5 minutes lenght 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 and 5 bar 70 psig maximum 2 The filtering device installed in the water line which 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 o EVAPORATOR 8I amami LLI 5 CONDENSER gt ELECTR 9 EH z Rx Tx o WATER DRAIN VALVE ELECTRONIC CARD 9 At completion of the water filling phase 5 minutes the unit passes automatically into the freezing cycle with the start up of COMPRESSOR WATER PUMP FAN MOTOR in air cooled version controlled by the condensing temperature sensor located within the condenser fins Fig 2 OPERATIONAL CHECKS D Install if required the refrigerant service gauges on both the high side and low side Scraeder valves to check the compressor head and suction pressures NOTE On air cooled
13. prior combination shown on Table B which allow an extention of two more minutes of the length of the freezing cycle 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 II 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 Takenote ofthe combination ofthe first four DIP SWITCH KEYS check the corrisponding length of freezing cycle 2nd phase on Table B 3 Set the same DIP SWITCH KEYS to correspond to the next combination shown on Table B which allow a reduction of two minutes of the length of the freezing cycle 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 SMALL IDENTATION LITTLE OR NO ICE IN CENTER OF CUBES THICK BULGE SOLID ICE 26 WIRING DIAGRAM AIR AND WATER COOLED 230 50 60 1 HOSSIYANOI YOLOW 3ATVA 3ATVA YOSNAS YOSNAS YOSNAS NVI 39uVHOSIGQ LITNI YILYVM SV5 LOH TINI 1 ONOI dWAL LA LA h d Ld
14. the heat exchanging action it looses some of its heat content so that its 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 Fig B 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 refrigerant flowing into the capillary tube warmer before to be sucked in the compressor and to be recirculated as hot compressed refrigerant gas The freezing cycle is controlled by the evaporator temperature sensor which has its probe in contact with the evaporator serpentine that determines the length of its first portion of the cycle When the temperature of the evaporator serpentine drops to a pre set value small Red LED ON steady the evaporator sensor probe changes its electrical resistance allowing a low voltage current 15 volts to flow tothe 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 of th
15. E The lenght of the entire freezing cycle is governed by the evaporator tempe rature sensor which has its probe placed in contact with the evaporator serpentine Non adjustable in combination with the electronic timer Adjustable incorporated in the P C BOARD Thetimeradjustment is factory set in consideration of the ice maker type cooling version and ice cube size Small Medium Large It is possible however to modify the timed lenght 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 second phase in relation with the different DIP SWITCH keys setting Afterabout 17 20 minutes from the begin ning of the freezing cycle in an hypothetic ambient temperature of 21 C the defrost cycle takes place with the hot gas the water inlet and the water drain valves simoultaneously activated Fig 5 The electrical components in operation on models are COMPRESSOR WATER INLET VALVE HOT GAS VALVE WATER DRAIN VALVE and the WATER PUMP for first 30 Fig 5 NOTE The lenght 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 Fig 4 to 15 C 5 F small Red LED ON steady TIME T2 Fig 4a Itis possible to extend the length of the defros
16. O O CONDENSER GAS VALVE Rx Tx BIN O ELECTRONIC CARD E Check through the ice discharge opening inverted mold cups also make sure that the thatthe spray system is correctly seated andthat plastic curtain is hanging freely and there is not the water jets uniformely reach the interior of the excessive water spilling through it si WATER DRAIN VALVE EVAPORATOR m gt CONDENSER lt ws amp L gt HOT GAS VALVE TIMER 0 COMPRESSOR A x 4 x DATA PROCESSOR BIN V O ELECTRONIC CARD 11 gt EVAPORATOR CONDENSER ELECTR TEMPERATURE SENSORS DATA PROCESSOR BIN WATER DRAIN VALVE HOT GAS VALVE COMPRESSOR ELECTRONIC CARD F Theice making 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 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 NOT
17. OTSMAN Ice Machine cleaner Page 29 SERVICE DIAGNOSIS SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION 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 Irregular cubes size amp some cloudy Some jets plugged Shortage of water Unit not level Remove jet cover and clean See shortage of water Level as required Cubes too large Freezing cycle too long Review setting of DIP SWITCH keys Decreased ice capacity Inefficient compressor Leaky water valve Non condensable gas in system Poor air circulation or excessive hot location Red alarm LED glows Overcharge 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 8 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 Discha
18. SERVICE MANUAL 16 short Electronic modular cubers SCOTSMAN EUROPE FRIMONT SPA Via Puccini 22 20010 Pogliano M se Milano Tel 39 02 93960 1 5 1 Telefax 39 02 93550500 4 Direct Line to Service amp Parts Phone 39 02 93960350 Fax 39 02 93540449 Iso M Website www scotsman ice com 9007 E Mail scotsman europe frimont it 0080 Scotsman MS 1002 02 REV 07 2010 5 Table of contents Specifications MC 16 short GENERAL INFORMATION AND INSTALLATION Introduction Unpacking and Inspection Location and levelling 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 Harvest cycle Control sequence Component description ADJUSTMENT REMOVAL AND REPLACEMENT PROCEDURES Adjustment of the cube size Wiring diagram Service diagnosis MAINTENANCE AND CLEANING INSTRUCTIONS General Icemaker Cleaning instructions of water system Page 2 lt O1 O1 15 17 19 25 26 27 28 31 31 32 3 SPECIFICATIONS ELECTRONIC MODULAR CUBER MODEL MC 16 short
19. align the hole located on unit base to mate with the one on the top of the Bin 6 Remove the PVC plastic plug closing the round hole located on the right side of 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 round hole into the Storage Bin 8 Fastentheice level control assy its bracket by means of the two screws found inthe hardware package supplied with the unit 9 Make a cut shear in the PVC plastic plug that goes fromits 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 Secure the Modular Cuber on the top of the Storage Bin using the two bolts and diber washer found in the hardware package supplied with the unit 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 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
20. aning for the SCOTSMAN MODULAR CUBERS The Electronic Modular Cubers 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 These icemakers have been engineered to our own rigid safety and performence standards CAUTION Incorrect voltage supplied to the icemaker will void your parts replacement program NOTE 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 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 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 Cutopenthe top ofthe 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 step 2 ab
21. ater from the sump to the spray system and through the spray nozzles sprays itinto the inverted cup molds to be frozen into crystal clear ice cubes It is recommended that the pump motor bearings be checked at least every six months O WATER INLET SOLENOID VALVE 3 4 MALE FITTING The water inlet solenoid valve is activated by the micro processor of the BOARD during the first 5 minutes of water filling phase as well as during the defrost cycle When energized it allows a metered amount of incoming water to flow over the 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 LENGTH OF TIMED PORTION OF FREEZING CYCLE ACCORDING TO THE DIP SWITCH SETTING COMBINATIONS 1 2 3 4 1 2 3 4 p Q i M s G wm I 111 2 ee 3 e I de 2171 i0 S EE Dun 4 X Mem a 12 SD m m 6 O am wm l min s j mm mn P HOT GAS SOLENOID VALVE The hot gas solenoid valve consists basically in two parts the valve body and the valve coil Located onthe hot gas line this valve is energized through the micro processor of BOARD during the defrost cy
22. ative 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 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 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 SC
23. bles 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 Ice maker pcb is equipped by jumper cleaning reminding setting see pag 21 suitable to alert users after certain time of unit operation This would advice MC 16 short for preventive maintenance This time can be adjusted for 6 or 12 months operation upon installer advice related to installation site water and ambient condition once selected time is elapsed RED front panel lamp blinks slowly and ice maker will keep on working anyway Pcb is also equipped by 3 standard 60 other models minutes Jumper setting start up delay see pag 21 In case of pcb setting to 60 minutes ice maker doesn t start until this time is elapsed After having correctly installed the ice maker and completed the plumbing and electrical connections perform the following Start up procedure START UP A Turn the power line breake ON and push the green button switch Unit will start up in charging cycle mode NOTE Every time the unit returns under power after having been switched off the water inlet valve the hot gas valve and the water drain 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 unit offperiod Fig 1
24. cle as well as 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 compressor to flow directly into the evaporator serpentine to defrost the formed ice cubes Q FAN MOTOR Air cooled version The fan motor is controlled through the P C BOARD and the TRIAC by the condenser tempe rature sensor Normally it operates only during 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 R 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 It compresses the low pressure Page 24 refrigerant vapor causing its temperature to rise and become high pressure hot vapor which is then released through the discharge valve 5 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 T WATER DRAIN SOLENOID VALVE The water drain solenoid valve electrically connected in parallel to the water inlet and to the hot gas soleno
25. coop 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 4 Remove frontand top panel then evaporator cover Page 32 5 Slowly pour onto the evaporator piaten the cleaning solution With the help of a brush dissol ve the most resistant and remote scale deposits in the platen 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 8 FREEZING CYCLE TOO HI COND TEMP TOO EVAP TEMP BIN FULL ELECTR TIMER TEMPERATURE SENSORS a DATA PROCESSOR WATER DRAIN VALVE 7 WATER IN ELECTRONIC CARD 33 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 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 spray bar to clean it
26. e factory C LOCATION AND LEVELLING WARNING This Ice Cuber is designed for indoor installation only Extended periods of operation at temperatures exceeding the following limitations will constitute misuseundertheterms ofthe 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 F b Water inlet temperatures minimum 5 C 40 F and maximum 35 C 90 F c Well ventilated location for air cooled models d Service access adequate space must be left for all service connections through the rear of the ice maker Aminimum 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 Level the Storage Bin Assy in both the left to right and front to rear directions by means of the adjustable legs 3 Inspect the Storage Bin top mounting gasket which should be flat with no wrinkles to provide a good sealing when the Modular Cuber is 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 Lifta little bit the Modular Cuber right side in order to be able to mount the ice level control bracket taking care to
27. e 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 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 small Red LED still OFF shortage of refrigerant inoperative hot gas valve etc the P C BOARD switch OFF immediately the unit with the simultaneous blinking of the WARNING RED LED The length of this timed portion of the freezing cycle is pre fixed and related to the setting of the first four DIP SWITCH keys The DIP SWITCH keys setting is made in consideration of the type of condenser used and size of ice cubes DIP SWITCH FACTORY SETTING COMBINATIONS PER MODEL AND VERSION FREEZING CYCLE DEFRosTCYCLE 1530 WATER DIP SWITCH 1 2 3 4 5 6 7 8 9 10 MCS 16 ON OFF ON ON OFF ON ON ON ON ON MCS 16 W OFF OFF LU 16W OFF OFF OFF OFF OFF 16 GE EVAPORATOR INLET VALVE SPRAY BAR lt Be NU PUMP NP OVERFLOW IW DRAIN LINE FICO EVAPORATOR INLET VALVE EVAPORATOR gt HOT GAS CONDENSER OVERFLOW DRAIN LINE 17 In Table B are indica
28. ges 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 NINE oo EVAPORATOR ELECTR TIMER TEMPERATURE SENSORS a lt EH ao a a BIN WATER DRAIN VALVE WATER IN VALVE ELECTRONIC CARD 14 FIG UR WATER DRAIN VALVE tc EVAPORATOR 7 9 O WATER IN VALVE a le 3 5 d 5 CONDENSER cL _ 1 lt 6 T ELECTR HOT GAS VALVE ui O TIMER E S zo COMPRESSOR wo i x x a Sd L N ELECTRONIC CARD 15 PRINCIPLE How works In the SCOTSMAN cube ice makers the water used to make the ice is kept constantly in circulation by an electricwater pump which primes it to the spray system nozzles from where it is diverted into the inverted mold cups of the evaporator A small 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 gas refrigerant discharged out from the compressorreachesthe condenserwhere 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
29. id 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 defrost cycle it allows the drain out of all remaining water rich of minerals deposited during the previous freezing cycle 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 soonorlater will cause the partial or total clogging of the water system on the unit Page 25 ADJUSTMENT 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 I 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 the combination ofthe first four DIP SWITCH KEYS check the corrisponding length of freezing cycle 2nd phase on Table B 3 Set the same DIP SWITCH KEYS to correspond to the
30. in portion first 30 sec Electrical components Loads ON OFF 8 Fan Motor Air cooled only and TRIAC x Hot Gas Vaklve Water Inlet Valve Water Drain P C Board Relay 1 amp 2 P C Board Relay 3 Coil Water Pump P G B Electronic Controls amp Sensors ON OFF Evaporator Sensor Condenser Sensor Level Control HARVEST Water filling portion Electrical components Loads ON OFF Compressor Fan Motor Air cooled only and TRIAC Hot Gas Valve Water Inlet Valve Water Drain P C Board Relay 1 amp 2 P C Board Relay 3 Coil Water Pump P C Board Timer Electronic Controls amp Sensors ON OFF Evaporator Sensor Condenser Sensor Ice Level Control
31. item 5 to item 10 just shorting the operation of the water pump to 10 minutes 21 Place again the evaporator cover and the unit service panels 22 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 ATTENTION In case the ice cubes are cloudy white and have an acid taste melt them immediately by pouring on them some warm water This to prevent that somebody could use them 23 Wipe clean and rinse the inner surfaces of the storage bin REMEMBER To prevent the accumulation of undesirable bacteria it is necessary 10 sanitize every week the interior of the storage bin
32. led versions for one of the following 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 40 C 100 F it causes 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 and RED LIGHT STEADY warning the user of the Hi Temperature situation After having eliminated the source of the condenser hi temperature to restart the machine it is necessary to switch OFF wait few seconds and switch ON again the unit 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 2 5 bar 35 psi then it declines gradually in relation with the growing of the ice thickness to reach at the end of the cycle approx 1 7 bar 24 psi with the cubes fully formed in the 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 is able to reach 0 C 32 F evaporating temperature
33. models the condenser temperature sensor which is located within the condenser fins keep the head condensing pressure between 15 17 bar 220 245 psi On water cooled version head pressure is kept at the valve of 17 bar 245 psi by the mean of water regulating valve In case of clogged air condenser filter which reduces 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 or 60 C 140 F for water cooled version the condenser temperature sensor shuts off the ice maker with the consequent light up of the RED WARNING LED Fig 3 as well as the Red Alarm Light ON Steady After having diagnosed the reason of the rise of temperature and removed its cause it is necessary to Switch OFF wait few seconds and Switch ON the unit thus to put the machine in condition to initiate anew freezing cycle The machine restarts with the usual 5 minutes water filling phase in order to provide enough water into the sump tank a 9 N EVAPORATOR ELECTR TIMER TEMPERATURE SENSORS P lt zi 26 tc a BIN WATER DRAIN VALVE 5 WATER IN VALVE ELECTRONIC CARD 10 WATER DRAIN VALVE EVAPORATOR c eo a gt 7 y OP
34. of WARNING RED LED D 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 the air cooled versions in relation to the different current received the micro processor ofthe P C BOARD supplies through a TRIAC the power at high voltage to the fan motor so to cool the condenser and to reduce its tempera ture In case the condenser temperature rises and reaches 70 C 160 F on air cooled models or 60 140 F on water cooled models the current arriving to the micro processor is such to cause an immediate and total stop of the machine operation ICE BIN LEVEL LIGHT CONTROL The electronic ice bin level control located into the storage bin has the function to stop the operation of the ice machine ONLY AT THE END OF THE HARVEST CYCLE when Page 20 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 blinking SETTING OF THE ICE LEVEL CONTROL SENSIVITY In case of any need it s possible to up to date the sensivity of the optical ice level control as per here below procedure a Switch OFF the machine at Green Light Master Switch
35. ol sensor to test shut off Put some ice cubes 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 of the ice cubes 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 lt 9 Check for refrigerant leaks D CLEANING INSTRUCTIONS WATER SYSTEM 1 Waittillihe end of defrost cycle then turn the unit OFF by the main switch disconnect power supply 2 Prepare 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 Physicianimmediatelly In case of external contact flush with water KEEP OUT OF THE REACH OF CHILDREN 3 S
36. ove 5 Loose two nuts on left and rights side of the unit base and remove it from the skid Save the two bolts and nuts to mount the machine on storage bin or on top of another Modular Cuber 6 Remove all internal support packing and masking tape and the hardware package 7 Check that refrigerant lines do not rub against or touch other lines or surfaces and that the fan blade moveS freely 8 Check that the compressor fits snugly onto all its mounting pads 9 See data plate on the rear side of the unit and check that local main voltage corresponds with the voltage specified on it 10 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 Scotsman Europe factory Storage bin 1 Follow the steps 1 2 and 3 above to unpack the storage bin 2 Unloose the two bolts and remove the protection plate from the drain fitting 3 Carefully lay it down on its rear side and fit the four legs into their sockets 4 Remove all internal support packing and 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 Scotsman Europ
37. rge 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 30 SERVICE DIAGNOSIS SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION Unit won t harvest Inoperative P C Board Replace P C Board Hot gas valve not opening Valve coil with open winding Replace valve Water solenoid valve not opening Valve coil with open winding Replace valve Incorrect discharge pressure Inoperative condenser sensor Replace sensor Inoperative P C Board Replace P C Board Water regulating valve Adjust its setting stem misadjusted Excessive water in unit base Water tubing leaking Check Tighten or replace 31 CLEANING INSTRUCTIONS GENERAL The periods andthe procedures 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 le
38. s completed Take ice away 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 indicating UNIT IN OPERATION and the extinguishing of the BIN FULL YELLOW LED NOTE The ICE LEVEL CONTROL INFRARED SYSTEM is independent ofthe 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 detector 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 CEDURES At time of installation it s necessary to perform the calibration of the Ice Level control e Switch OFF the machine at Master Green Push Button Switch Push and hold the PC Board Push Button Switch ON the machine at Master Green Push Button Switch Few seconds later the LEDs of the PC Board starts to blink Release the PC Board Push Button The Ice Level control is now calibrated K Remove if fitted the refrigerant service gau
39. s necessary first to replace the condenser sensor then push and hold for 5 the Red Re Set Button See also light monitoring chart REASON WHY UNIT IN OPERATION RED LIGHT ON STEADY WITH MACHINE ON CONDENSING TEMP gt 60 C CLEAN AIR FILTER RED LIGHT ON STEADY WITH MACHINE OFF CONDENSING TEMP gt 70 C BLINKING SLOW WITH MACHINE ON WATER SYSTEM NEED TO BE CLEANED BLINKING TWICE AND REPEAT WITH MACHINE OFF CONDENSER SENSOR OUT OF ORDER PUSH AND HOLD THE RED LIGHTED SWITCH FOR MORE THEN 20 TO RESTART THE CLEANING REMIND COUNTDOWN 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 is energized the small Red LED of the PC Board blink or steady When steady the micro processor supplies power to the electronic timer built into the P C BOARD so that it takes control of the last portion of freezing cycle The length of the timed phase is pre fixed by the setting of the keys 1 2 3 and 4 of the DIP SWITCH 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 small Red LED OFF the P C Board switches OFF the machine with the BLINKING
40. separately as per steps 3 and 4 of paragraph B 11 Give power to the unit by the main switch 12 Duringthe Water Filling Phase push RESET BUTTON for more then 2 but less then 5 the machine enter in Rinsing Mode Fig 8 13 Let unit remain in the RINSING MODE mode for about 10 minutes then turn the main switch to OFF disconnect unit from POWER 14 Flush outthe rinsing solution from the sump reservoirs 15 Place again the evaporator cover and 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 Sanitation NOTE Sanitation of the water system is recommended to be done once a month 19 Prepare in a plastic container the sanitation solution as per manufacturer dilution using warm water 45 50 C NOTE Never mix the cleaning with the sanitising solution 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 20 Followthe procedures as per cleaning from
41. t cycle by changing the setting of DIP SWITCH 7 and 8 as shown on table at page 23 H Check during the defrost cycle that the incoming water flows correctly into the sump reservoir in order to refill it and that the surplus overflows through the overflow drain tube Page 12 a a TEMPERATURE SENSORS WATER DRAIN VALVE ee WATER IN VALVE ELECTR TIMER a lt a a ELECTRONIC CARD e WATER DRAIN VALVE EVAPORATOR O 5 CONDENSER LZ s gt e a COMPRESSOR Rx Tx X 0 ELECTRONIC CARD 13 I 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 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 ice cubes between its sensing eyes to interrupt the light beam The Bin Full YELLOW LED starts blinking Fig 6 and after 60 seconds the same LED goes steady Fig 6a Ice maker stops at bin full condition once defrost cycle i
42. ted the various lengths ofthe timed portion of freezing cycle 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 models and versions as they are set in the factory The electrical components in operation during the freezing cycle are COMPRESSOR FAN MOTOR in air cooled version WATER PUMP 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 15 17 bar 220 245 psi in the air cooled version being controlled by the temperature sensor probe located within the condenser fins On the air cooled version the condenser tempe rature sensor when senses a rising of the condenser temperature beyond the pre fixed limit changes its electrical resistance and transmits a low voltage power flow to the Micro Processor of P C BOARD which in turn energizes through a TRIAC the FAN MOTOR When the opposite situation occures i e the condenser temperature gets below the pre fixed limit the temperature sensor changes again its electrical resistance reducing therefore the current flow to the P C BOARD to cause the fan motor temporary cut off NOTE In case the condenser temperature probe senses that the condenser temperatu re has rised to 70 C 160 F on air cooled versions or 60 C 140 F on water coo
43. ter cooled condenser Connect the 3 4 GAS male fitting of the water inlet using the 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 I D 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 Aventatthe unit drain connection is also required for proper sump drainage Water drain Water cooled models Connect the 3 4 GAS male fitting of the condenser water drain using 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 Page 7 F FINAL CHECK LIST 1 Is the unit 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 ls 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 press
44. ure been checked to ensure a water pressure of at least 1 bar 14 psi 7 Havethebolts holding the compressor down been checked to ensure that the compressor is snugly fitted onto the mounting pads 8 Check all refrigerant lines and conduit lines to guard against vibrations and possible failure 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 numberofthe 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 7 9 Drain fitting 8 10 Vented drain line 11 Open trapped vented drain 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 90 44 8 OPERATING INSTRUCTIONS B During the water filling operation check to see that the incoming water drib
45. vaporator 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 the hot gas valve the water inlet valve and the water drain valve close and the machine starts again a new freezing cycle OPERATION CONTROL SEQUENCE At the start of freezing cycle the evaporator temperature sensor controlsthe length ofthe first part of the freezing cycle As itreaches a predeter mined temperature it supplies alow voltage current to 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 B 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 timed portion of the freezing cycle the system goes automatically into the defrost cycle which has also a pre fixed length At completion of the defrost cycle the P C BOARD command 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
46. 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 Page 6 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 Since water is the most important 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 cloudy coloured ice cubes plus scale build up on parts of the water system Water supply Connectthe 3 4 GAS male fitting of the solenoid water inlet valve 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 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 wa
47. velled in 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 from the 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 local areas 5 With the ice machine and fan motor OFF 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 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 contr
48. wiring diagram for a reference BEGINNING FREEZE Electrical components Loads ON OFF siete Fan Motor Air cooled only and TRIAC Hot Gas Valve Water Inlet Valve gt Water Drain Valve P C Board Relay 1 Coil P C Board Relay 2 amp 3 Water Pump 222 TMC eh ene e Elctronic Controls amp Sensors ON OFF e Evaporator Sensor Condenser Sensor Ice Level Control TIMED FREEZE Electrical components Loads ON OFF Compressor Fan Motor Air cooled only and TRIAC Hot Gas Valve Water Inlet Valve Water Drain Valve P C Board Relay 1 Coil gt Relay 2 amp 3 Water Pump aaa P G B Timet yn auqa uusha Electronic Controls amp Sensors ON OFF Evaporator Sensor Condenser Sensor Ice Level Control Page 18 HARVEST Dra
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