Scotsman AC 45 icemaker
Contents
1. SPECIFICATIONS 2 as SR le als l sep js 7j ka J laj TU 410 bi d d LLLA ZE Ta 122 522 20 55164 amp i Dimensions m HEIGHT 738 mm WIDTH 457 mm EL EL DEPTH 522 mm WEIGHT 44 Kgs J L Kile 55 CUBER machine specifications Model Cond unit Finish P ae AC 55 AS 6 Air 110 AC 55 WS 6 Water Stainless steel 1 4 14 290 Start Electric power cons Basic electr Amps Amps Watts Kwh per 24 Hr Nr of wires Amps fuse 230 50 1 2 2 11 390 7 3 x 1 5 mm 10 Cubes per harvest 24 medium A 15 water temperature Page 7 SPECIFICATIONS ELECTRONIC CUBER MODEL AC 85 Important operating requirements MIN MAX Air temperature 10 50 F 40 100 F Water temperature 5 C 40 F 40 C 100 F Water pressure 1 bar 14 psi 5 bar 70 psi Electr voltage variations from voltage rating specified on nameplate 10 10 AIR COOLED MODELS WATER COOLED MODELS Kg Kg 40 40 10 10 21 38 A 21 38 ul 32 ul 2 36 tc 2 36 38 x T T E lt a lt tr 34 32 a oc 34 a Li a a a a A 38 a 9 2 30 a 302. 0 C BLINKING RESET PUSH BUTTON TRIAC MICROPROCESSOR RE EPROM FUSE FREEZING g o TRANSFORMER ALARM x WATER PUMP RELAY BIN FULL COMPRESSOR RELAY POWER fi _ FUSE ADJUSTER RESISTANCE EVAPORATOR VARISTOR SENSOR SOCKET HOT GAS WATER OPTICAL ICE LEVEL INLET AND PURGE CONDENSER CONTROLSENSOR TERMINAL VALVES RELAY SENSOR SOCKET SOCKET BOARD 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 FREEZING 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 the machine 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 PUSH 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 bi
3. The electrical components in operation during this phase are COMPRESSOR CONTACTOR COIL AC 125 175 225 only WATER INLET VALVE HOT GAS VALVE WATER DRAIN VALVE and the WATER PUMP onthe first 15 seconds or 30 seconds AC 225 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 F and H 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 refrigerant as hot gas 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 NOTE The length of the defrost cycle factory set changes in accordance with the duration of the second portion of the freezing cycle Time T2 that is related to the ambient temperature At the end of the defrost cycle the hot gas valve the water inlet valve and the water dr
4. 12 Followthe procedures as per cleaning from item 4 to item 10 just shorting the operation of the water pump to 10 minutes 13 Place again the evaporator cover and the unit service panels 14 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 15 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
5. 25 MIN 3 On a 211 4 or 5 w 17 min e 6 OF mam m s 15 min 7 oe EMEN w 13 min Page 33 During the freezing cycle the pump primes the water from the sump to the spray system and through the spray nozzles sprays it into the inverted cup molds to be frozen into crystal clear ice cubes Itis recommended that the pump motor bearings be checked at least every six months J WATER INLET SOLENOID VALVE 3 4 MALE FITTING Water cooled version A special water inlet solenoid valve with one inlet and two outles one for condenser and the second for the production of ice is used on water cooled version An automatic hi pressure control activates the second coil of the water inlet solenoid valve so to supply a metered amount of water to the condenser and drop down its temperature and pressure K 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 P C BOARD during the defrost cycle 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 L FAN MOTOR Air cooled ver
6. P C Board Relay 1 amp 2 P C Board Relay 3 Coil Water Pump eene Contactor Coil AC 125 175 225 only Timer se Electronic Controls amp Sensors ON Evaporator Sensor Condenser Sensor Ice Level Control HARVEST Water filling portion Electrical components Loads ON Fan Motor Air cooled only and TRIAC Hot Gas Valve Water Inlet Valve Water Drain valve P C Board Relay 1 amp 2 Coil P C Board Relay 3 Coil Water Pump eene Contactor Coil AC 125 175 225 only P C Board Timer Electronic Controls amp Sensors ON Evaporator Sensor Condenser Sensor Ice Level Control OFF OFF OFF OFF OPERATING CHARACTERISTICS AC 45 55 85 105 125 175 Freeze Cycle Average Discharge Pressure A C Average Discharge Pressure W C Suction Pressure End Freeze Cycle AC 225 Freeze Cycle Average Discharge Pressure A C Aver
7. gt 65 38 a 60 39 a a 625 a a 2 a 2 H s75 60 2 a 55 E C 575 e a 2 a 52 5 a a 55 m 50 lt 5 5 lt 47 5 50 45 47 5 32 27 21 15 10 32 27 21 15 10 C WATER TEMPERATURE WATER TEMPERATURE NOTE With the unit in built in conditions the ice production is gradually reduced in respect to the levels shown in the graf up to a maximum of 10 at room temperatures higher than 32 C The daily ice making capacity is directly related to the condenser air inlet temperature water temperature and age of the machine Tokeep your SCOTSMAN CUBER at peak performance levels periodic maintenance checks must be carried out as indicated on page 40 of this manual Page 12 S MIN FOR UTILITY CONNECTIONS 152 5 63 64 SPECIFICATIONS CONT D 190 L 7 31 64 III 675 26 37 64 3 4 GAS 3 4 GAS 3 4 GAS WATER OUTLET WATER COOLED ONLY 3 4 GAS WATER INLET WATER COOLED ONLY 920mm 25 32 OD OVERFLOW DRAIN 3 4 3 4 GAS WATER NLET 8977 35 11 32 120 4 23 3 CORD SET FRONT VIEW HEIGHT without legs HEIGHT with legs WIDTH DEPTH WEIGHT AC 125 CUBER machine specifications 900 mm 1020 mm 675 mm 520 mm 75 Kgs Model Cond Finish Comp HP ine Em RR AC 125 AS Air S S
8. Coil P C Board Relay 2 amp 3 Water Pump Contactor Coil AC 125 175 225 only P G B TIMER eid ns Elctronic Controls amp Sensors ON OFF Evaporator Sensor k Condenser Sensor Ice Level Control TIMED FREEZE Electrical components Loads ON Compressor ionii orenen Fan Motor Air cooled only and TRIAC Hot Gas Valve Water Inlet Valve Water Drain Valve P C Board Relay 1 Coil P C Board Relay 2 amp 3 Water Pump Contactor Coil AC 125 175 225 only TIMOR cioe Electronic Controls amp Sensors ON Evaporator Sensor Condenser Sensor 9 e Ice Level Control OFF OFF HARVEST Drain portion first 15 30 sec Electrical components Loads ON Coinpr 8s0r ce ete Fan Motor Air cooled only and TRIAC Hot Gas Valve Water Inlet Valve Water Drain valve
9. it Replace it Compressor cycles intermittently Low voltage Contactor with burnt contacts AC 125 175 225 only 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 SCOTSMAN Ice Machine cleaner SERVICE DIAGNOSIS Page 38 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 8 some cloudy Some jets plugged Shortage of water Unit not level Remove jet cover and clean See shortage of water Leve
10. la z lt r E a m a LI 4 E 2 LI 2 N c a m x a M ul C B ES x 2 gt a 3 3 a a lt Z g i 8 a a o 2 SENSORS a SS z lt 2 e lt a Qa a LL a 6 JUST FOR AIR COOLED UNIT X USED ONLY UNIT AT 240V Page 37 SERVICE DIAGNOSIS 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 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
11. m a a o o m a a o o WATER DRAIN VALVE ELECTRONIC CARD J Check the texture ofice 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 K To be sure of the correct operation of ice level control device place one hand 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 Take the hand out 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 Page 24 NOTE The ICE LEVEL CONTROL INFRARED SYSTEM is independent of the temperature however the reliability of its detection can be affected by external light radiations or by any sort of dirt and scale sediment which may deposit directly on the light source and on the rece
12. of wires Amps fuse Amps Kwh per 24 Hr 230 50 1 2 2 11 340 6 5 1 5 mm 10 Cubes per harvest 18 medium A 15 C water temperature Page 5 SPECIFICATIONS ELECTRONIC CUBER MODEL AC 55 L Important operating requirements MIN MAX Air temperature 10 C 40 C Water temperature 5 C 40 Water pressure 1 bar 5 bar Electr voltage variations from voltage rating specified on nameplate 10 10 ki it AIR COOLED MODELS WATER COOLED MODELS Kg C 2 32 la m 30 30 21 21 E 32 gt a 28 lt 28 38 lt Li a ui 26 n n 26 B a 32 a a a 24 ai 5 24 3 38 22 E 22 a 20 m a 20 a 18 z 18 32 27 21 15 10 C 32 27 21 15 10 C WATER TEMPERATURE WATER TEMPERATURE NOTE With the unit in built in conditions the ice production is gradually reduced in respect to the levels shown in the graf up to a maximum of 10 at room temperatures higher than 32 C 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 CUBER at peak performance levels periodic maintenance checks must be carried out as indicated on page 40 of this manual Page 6
13. 0 a 19 38 19 a a 18 18 d Li E Li a 17 a 17 e m m 16 16 15 15 32 27 21 15 10 C 32 27 21 15 10 C WATER TEMPERATURE WATER TEMPERATURE NOTE With the unit in built in conditions the ice production is gradually reduced in respect to the levels shown in the graf up to a maximum of 10 at room temperatures higher than 32 C 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 CUBER at peak performance levels periodic maintenance checks must be carried out as indicated on page 40 of this manual Page 4 SPECIFICATIONS 2 s 2 g 5 amp z Z E 5 8 u B E d d We A Rv A m Li ki e gis yer ea 5 gl AE t2 449 T 18 57754 14 Lwa 3 le Dimensions HEIGHT 725 mm WIDTH 457 mm Vq DEPTH 480 mm WEIGHT 39 Kgs oo EZ 385 als IN 457 17 63 4 AC 45 CUBER machine specifications Model Cond unit Finish Comp HP uer reu AC 45 AS 6 Air 100 inl 1 4 14 Kg 45 WS 6 Water Stainless stee f g 270 Basic electr Amps Start Watts Electric power cons Nr
14. 25 32 00 OUTLET CORD SET 220 m 3 4 G awa e ae SPAZO MNMO COLLEGAMENTI LI FRONT VIEW HEIGHT without legs 813 mm HEIGHT with legs 950 mm S00 3112 WIDTH 535 mm DEPTH 534 mm WEIGHT 44 kgs 400 5 3 2 AC 105 CUBER machine specifications Model Cond Finish Comp HP Ke ME AC 105 AS Air S Steel 180 3 8 18 AC 105 WS Water S Steel 530 Electr power cons Basic electr Amps Start Amps Watts Kwh per 24 Hrs No of Wires Amp Fuse 230 50 1 3 5 18 550 10 3x1 5 mm 10 Cubes per harvest 32 medium At 15 C water temperature Page 11 SPECIFICATIONS ELECTRONIC CUBER MODEL AC 125 Important operating requirements MIN MAX Air temperature 10 C 50 F 40 100 F Water temperature 5 C 40 F 40 C 100 F Water pressure 1 bar 14 psi 5 bar 70 psi Electr voltage variations from voltage rating specified on nameplate 10 10 AIR COOLED MODELS WATER COOLED MODELS Kg C Kg 72 5 10 75 10 70 72 5 21 21 gj 65 ul oO 0 3 W a a a a zE 65 ZE 67 5 62 5
15. 25A ON ON OFF ON OFF ON ON ON ON ACM 225 W ON ON OFF ON OFF ON ON ON OFF ACL55A ON ON ON OFF ON ON ON ON OFF ON ACL 125 A OFF OFF OFF ON OFF OFF ON ON OFF ON ACL 125 W OFF OFF OFF ON OFF OFF ON ON OFF OFF ACL 225A OFF OFF OFF ON ON OFF ON ON ON ON ACL 225 W OFF OFF OFF ON ON OFF ON ON ON OFF Page 26 EVAPORATOR PLATEN EVAPORATOR a 8 TE Nul Z Fon 5 E ie Spray 5 b b OVERFLOW DRAIN LINE INLET VALVE EVAPORATOR OVERFLOW DRAIN LINE Page 27 EVAPORATOR INLET VALVE A In Table B are indicated the various lengths of the 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 CONTACTOR COIL AC 125 175 225 only 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 8 5 and 9 5 bars 110 130 psig 15 17 bar 220 245 psi on AC 225 in
16. 30 430 12 13307 5 530 105 1030 12 430 6 1990 15 530 6 90 gt 12 gt b 15 gt b The 7th D S key is not used in this release of the P C BOARD The 8th key allows the operation of the water pump even during the defrost cycle as required when it is necessary to drain out the remaining water from the sump 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 water cooled versions ON position to 60 C 140 F OFF position for the air 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 seconds of the defrost cycle so to such the remaining water from the sump tank reach in mineral salts and drain it out LENGTH OF TIMED PORTION OF FREEZING CYCLE ACCORDING TO THE DIP SWITCH SETTING COMBINATIONS 1 2 3 4 B ww 7 bin o 10 m Q mE m wm cn 19 0 ume in 18 o sj TAB B 1 2 3 4 1 on 25 min ON a 2 or mam wm
17. 5 Li a 28 2 a 28 S lt lt a 26 26 32 27 21 15 10 C 32 27 21 15 10 C WATER TEMPERATURE WATER TEMPERATURE NOTE With the unit in built in conditions the ice production is gradually reduced in respect to the levels shown in the graf up to a maximum of 10 at room temperatures higher than 32 C 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 CUBER at peak performance levels periodic maintenance checks must be carried out as indicated on page 40 of this manual Page 8 SPECIFICATIONS ES 2 aye 3 L L b 1522 522 20 55164 Dimensions m HEIGHT 738 mm E WIDTH 457 mm EL EL DEPTH 522 mm WEIGHT 44 Kgs gt UY AC 85 CUBER machine specifications Model Cond unit Finish Gomp Hb sek ret 85 AS Air 140 AC 85 WS Water Stainless steel 3 8 14 Kg 380 Start Electric power cons Basic electr Amps Amps Watts Kwh per 24 Hr Nr of wires Amps fuse 230 50 1 3 2 17 500 10 3 x 1 5 mm 10 Cubes per harvest 24 medium A 15 C w
18. AS WATER NLET WATER COOLED ONLY 3 4 3 4 GAS WATER NLET 20 25 32 OD OVERFLOW DRAN CORD SET gl Eg FRONT VIEW HEIGHT withoutlegs 1006 mm HEIGHT with legs 1126 mm QE WIDTH 1078 mm X J DEPTH 660 mm zv IE WEIGHT 115 Kgs AC 225 CUBER machine specifications Model Cond Finish Comp HP ae e Water requirem AC 225 AS Air S Steel 250 1 70 AC 225 WS Water S Steel 1500 Electr power cons Basic electr Amps Start Amps Watts Kwh per 24 Hrs No of Wires Amp Fuse 230 50 1 5 3 29 1100 22 3x1 5mm 16 Cubes per harvest 72 large 102 medium 198 small At 15 C 60 F water temperature Page 17 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 SCOTSMAN AC series icemakers The Electronic 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 performance standards 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 1 Ca
19. N ice machines are supplied from the factory completely pre wired and require only electrical power connections to the wire cord provided at 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 Al 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 given 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 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 Air Cooled Versions Connect the 3 4 male fitting of the solenoid water inlet valve using the flexible tube supplied to the cold water supply line with regular plumbing fitting and
20. SCOTSMAN AC 45 AC 55 AC 85 AC 105 AC 125 AC 175 AC 225 Electronic cubers wi ith storage New PC Board versio n INDICE Page 2 Table of contents page 2 Specifications AC 45 3 Specifications AC 55 pe ations A Specifications AC 105 9 Specifications AC 125 Specifications AC 175 Specifications AC 225 GENERAL INFORMATION AND INSTALLATION Introduction Unpacking and Inspection Location and levelling Electrical connections Water supply and drain connections Final check list Installation practice 19 OPERATING INSTRUCTIONS tart up 20 Operational checks N OPERATING PRINCIPLES How it works Freezing cycle 25 Harvest cycle 2 Control sequence 29 Component description 30 ADJUSTMENT REMOVAL AND REPLACEMENT PROCEDURES MAINTENANCE AND CLEANING INSTRUCTIONS General 40 Icemaker 40 Cleaning instructions of water system 41 Page 3 SPECIFICATIONS ELECTRONIC CUBER MODEL AC 45 L Important operating requirements MIN MAX Air temperature 10 C 40 Water temperature 5 C 40 Water pressure 1 5bar Electr voltage variations from voltage rating specified on nameplate 10 10 ki it AIR COOLED MODELS WATER COOLED MODELS Kg C Kg C 24 10 24 10 m 23 21 e 23 al a a 32 22 a 22 38 2 N N c 21 lt c 21 lt ui cc ui ES 20 32 2
21. Y PASS PUSH MORE THEN 5 SEC DURING FREEZING FOR HARVEST PUSH e PUSH MORE THEN 5 SEC DURING TERMINAL HARVEST FOR FREEZING FREEZING OPER TOO COND EVAP TEMP BIN FULL POWER ON EVAPORATOR TEMP TX gt 2 GV RED ORANGE WHITE GREY BLACK BLUE BROWN YELLOW GREEN BOARD PRESSURE CONTROL 88 JUST FOR AIR COOLED UNIT M RX GV a lt N w a rt T gt a ul ul lt _ _ 4 gt gt gt a ul lt lt lt iJ a gt gt x gt z v S a o e uj S z z gt x 8 5 e 2 e 5 5 lt lt n L x n SENSORS 5 gt z a a Z S JUST FOR WATER COOLED UNIT Page 36 WIRING DIAGRAM AC 125 175 225 AIR amp WATER COOLED 230 50 60 1 R REO ORANGE B WHITE G GREY N BLACK A BLUE M BROWN GV YELLOW GREEN PRINTED CIRCUIT BOARD PUSH 2 5 SEC DURING WATER FILLING FOR CLEANING PUSH MORE THEN 5 SEC DURING koi FILLING FOR BY PASS PUSH MORE THEN 5 SEC DURING FREEZING FOR HARVEST a PUSH MORE THEN 5 SEC DURING lt HARVEST FOR FREEZING 2 a lt FREEZING OPER 4 TOO HI COND EVAP TEMP A BIN FULL 3 K Li
22. a shut off valve installed in an accessible position between the water supply line and the unit If water contains a high level of impurities it is advisable to consider the use an appropriate water filter or conditioner Water Cooled Versions AC 45 55 85 105 On Water Cooled version the water inlet solenoid valve has two separate outhets one for the condenser and the second for the production of ice Page 18 Water Cooled Versions AC 125 175 225 The water cooled versions require two separate inlet water supplies one for water sprayed for making the ice cubes and the other for the water cooled condenser Connect the 3 4 male fitting of the water inlet of condenser using the flexible tube supplied to the cold water supply line with regular plumbing fitting and a shut off valve installed in an accessible position between the water supply line and the unit WATER DRAIN The recommended drain tube is a plastic or flexible tube with 18 mm 3 4 1 0 which runs to an open trapped and vented drain WATER DRAIN WATER COOLED MODELS Connect the 3 4 male fitting of the condenser water drain utilizing a second flexible hose 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 mi
23. age Discharge Pressure W C Suction Pressure End Freeze Cycle 9 5 8 5 bar 130 110 psig 10 5 9 5 bar 150 135 psig 0 0 1 bar 0 1 psig 15 17 bars 220 245 psig 17 bars 245 psig 1 7 bar 24 psig REFRIGERANT METERING DEVICE capillary tube REFRIGERANT CHARGE R 134 A AC 45 AC 55 AC 85 AC 105 AC 125 AC 175 Air cooled 250 gr 9 0 oz 260 gr 9 3 02 290 gr 10 2 oz 320 gr 11 0 oz 450 gr 16 0 oz 450 gr 16 0 oz GREN LA poy AAS lt gt DY NH Water cooled 250 gr 9 0 oz 250 gr 9 0 oz 250 gr 9 0 oz 250 gr 9 0 oz 300 gr 10 6 oz 330 gr 11 6 oz 2 lt gt YH DH REFRIGERANT CHARGE R 404 A AC 225 Air cooled 620 gr 22 oz Water cooled 450 gr 16 02 Page 30 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 acurrent 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 thatittakes 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 Whene
24. ain valve close and the machine starts again a new freezing cycle Page 29 OPERATION CONTROL SEQUENCE At the start of 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 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 wiring diagram for a reference BEGINNING FREEZE Electrical components Loads ON OFF Fan Motor Air cooled only and TRIAC Hot Gas Valve Water Inlet Valve Water Drain Valve P C Board Relay 1
25. aken from the data plate Forward the completed self addressed registration card to Frimont factory 11 If necessary fit the four legs not on AC 45 into their seats on the machine base and adjust them to the desired level 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 misuse under the terms of the SCOTSMAN Manufacturer s Limited Warranty resulting in LOSS of warranty coverage 1 Position the unit 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 leftfor 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 Level the unit in both the left to right and front to rear directions 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 SCOTSMA
26. aten 6 Plug in again the machine and push the PUSH BUTTON for more then 2 and less then 5 NOTE With the system in CLEANING RINSING mode the water pump is the only component in operation to circulate the cleaning solution in the entire water system 7 Let the unit to remain in the CLEANING mode for about 20 minutes then unplug again the machine 8 Flush out the cleaning solution from the sump reservoir then pour onto the evaporator cavity two or three liters of clean potable water to rinse the mold cups and the platen If necessary remove the water spray bar and spray jets to clean them separately 9 Plug in again the machine and push the PUSH BUTTON as per item 6 The water pump is again in operation to circulate the water in order to rinse the entire water system 10 Unplug the machine then flush out the rinsing water from the sump reservoir then plug in again NOTE The ice maker will perform the 5 minutes WATER FILLING phase i e the water inlet solenoid valve opens to allow the incoming water to rinse again the water system and to properly fill up the sump reservoir for the next freezing cycle Page 42 Sanitation NOTE Sanitation of the water system is recommended to be done once a month 11 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
27. ater temperature Page 9 SPECIFICATIONS ELECTRONIC CUBER MODEL AC 105 Important operating requirements SS MIN MAX _ Air temperature 10 50 F 40 100 F ss Water temperature 5 C 40 F 40 C 100 F ISSS Water pressure 1 bar 14 psi 5 bar 70 psi SESS Electr voltage SSEE variations from voltage rating specified on LI nameplate 10 10 AIR COOLED MODELS WATER COOLED MODELS Kg C Kg C 50 10 50 10 48 21 48 21 46 46 32 e 44 44 a 2 gt 42 E 42 a oc 32 Li Li LI a 40 a a 38 38 Lr 38 H 2 36 36 a a a 34 lt 34 lt 32 32 30 30 32 27 21 15 10 C 32 27 21 15 10 C WATER TEMPERATURE WATER TEMPERATURE NOTE With the unit in built in conditions the ice production is gradually reduced in respect to the levels shown in the graf up to a maximum of 10 at room temperatures higher than 32 C 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 CUBER at peak performance levels periodic maintenance checks must be carried out as indicated on page 40 of this manual Page 10 SPECIFICATIONS CONT D WATER OUTLET WATER COOLED ONLY WATER NLET
28. chine To keep your SCOTSMAN CUBER at peak performance levels periodic maintenance checks must be carried out as indicated on page 40 of this manual Page 14 N SPECIFICATIONS CONT D DIO a 2 2 2 6 gt 3 a m v L z 152 521 5 63 64 20 33 64 675 26 37 64 3 4 GAS 3 4 GAS 3 4 GAS WATER OUTLET WATER COOLED ONLY 3 4 GAS WATER INLET WATER COOLED ONLY 20mm 25 32 OO OVERFLOW DRAIN 374 3 4 GAS WATER 8977 35 11 32 CORD SET FRONT VIEW HEIGHT without legs HEIGHT with legs WIDTH DEPTH WEIGHT AC 175 CUBER machine specifications 900 mm 1020 mm 675 mm 520 mm 75 Kgs Model Cond Finish Comp HP 175 AS Air S Steel 160 3 4 28 AC 175 WS Water S Steel 1000 Electr power cons Basic electr Amps Start Amps Watts Kwh per 24 Hrs No of Wires Amp Fuse 230 50 1 5 3 29 850 18 3x1 5 mm 16 Cubes per harvest 36 large 48 medium At 15 C water temperature Page 15 SPECIFICATIONS ELECTRONIC CUBER MODEL AC 225 Important operating requirements MIN MAX Air temperature 10 C 50 F 40 100 F Water
29. d 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 Page 20 OPERATING INSTRUCTIONS START UP After having correctly installed the ice maker and completed the plumbing and electrical connections perform the following Start up pro cedure A 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 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 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 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
30. en the electrical circuit to the compressor Q 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 15 seconds at the beginning of the defrost cycle itallows the drain out ofall 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 soon or later will cause the partial or total clogging of the water system on the unit 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 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
31. er cleaning will indicate frequency and proce dure to be followed in local areas 4 Withtheice 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 sensors 5 Check for water leaks and tighten drain line connections Pour water down bin drain line to be sure that drain line is open and clear 6 Check size condition and texture of ice cubes Perform adjustment of DIP SWITCH keys as required 7 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 o EVAPORATOR gt 9 CONDENSER a a a 5 e z m a COMPRESSOR WATER DRAIN VALVE HOT GAS VALVE j CONTACTOR COIL ELECTRONIC CARD Page 41 NOTE Within few seconds after the removal of the 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 4 CLEANING INSTRUCTIONS OF WATER SYSTEM 1 Remov
32. ethe front andthe top panels to gain access either to the control box and to the evaporator 2 Waittillthe end of defrost cycle then unplug the machine from power line Cleaning 3 Prepare the cleaning solution by diluting in a plastic container two liters of warm water 45 50 C with a0 2 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 immediately In case of external contact flush with water KEEP OUT OF THE REACH OF CHILDREN 9 Check for refrigerant leaks 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 removing the overflow stand pipe COMPRESSOR 7 SWITCH O N Z EVAPORATOR O O O O o O 2 516 o CONDENSER Z F o PFL gt ELECTR amp 9 o m a WATER DRAIN VALVE 9 WATER IN VALVE AH HOT GAS VALVE pe ap 0 7 CONTACTOR COIL BE ELECTRONIC CARD 5 Remove the evaporator cover then slowly pour onto the evaporator platen the cleaning solution With the help of a brush dissolve the most resistant and remote scale deposits in the pl
33. 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 heatcontentso 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 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 it exchanges 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 to the P C BOARD which in turn activates an electronic timer The timer which is built in the P C BOARD ta
34. iver 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 it is 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 PRO CEDURES Its sensivity can be adjusted by turning the IR trimmer L Remove if fitted the refrigerant service gauges and re fit the unit service panels previously removed M Instruct the owner user on the general operation of the ice machine and about the cleaning and care it requires EVAPORATOR BIN TEMPERATURE SENSORS COMPRESSOR _ OO WATER DRAIN VALVE a Q WATER IN VALVE ELECTRONIC CARD Page 25 PRINCIPLE OF OPERATION How it works In the SCOTSMAN cube ice makers the water used to make the ice is kept constantly in circulation by an electric water pump which primes it to the spray system nozzles from where it is diverted into the inverted mold cups of the evaporator 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 The hot gas refrigerant discharged out from the compressor reaches the condenser where being cooled down condenses
35. kes over from the evaporator temperature sensor the control of the freezing cycle up to its completion NOTE The change of the 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 DEFROST CYCLE W PUMP 15 30 AIR WATER DIP SWITCH 1 2 3 4 5 6 7 8 9 10 ACS 125A OFF OFF ON ON ON OFF ON ON OFF ON ACS 225A OFF OFF ON ON ON OFF ON ON ON ON ACS 225 W OFF OFF ON ON ON OFF ON ON ON OFF ACM 45 55 85 125 175 A ON ON OFF ON OFF ON ON OFF ON ACM 45 55 85 125 175 W ON ON OFF ON OFF ON ON OFF OFF ACM 105A ON ON OFF ON ON ON ON OFF ON ACM 105 W ON ON OFF ON ON ON ON OFF OFF ACM 2
36. l 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 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 Page 39 SERVICE DIAGNOSIS SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION 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 wi
37. llyour 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 Cutand remove the plastic strip securing the carton box to the skid b Cutopen the top of the carton and remove the polystyre protection sheet c Pull out the polystyre posts from the corners and then remove the carton 4 Remove the front panel of the unit and inspect for any concealed damage Notify carrier of your claim for the concealed damage as steted in step 2 above 5 Check that refrigerant lines do not rub against or touch other lines or surfaces and that the fan blade moves freely 6 Check that the compressor fits snugly onto all its mounting pads 7 Remove all internal support packing and masking tape E 8 Use clean damp cloth to wipe the surfaces inside the storage bin and the outside of the cabinet 9 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 10 Remove the manufacturer s registration card from the inside of the User Manual and fill in all parts including Model and Serial Number t
38. n full YELLOW BIN FULL LED BLINKING Infrared beam break out Page 32 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 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 or to 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 The DIP SWITCH keys 5 amp 6 setting determines the length of the defrost cycle according to the size of the cubes Large or Medium as per the following setting ON ON A ON OFF B OFF OFF C OFF ON D It is not possible to modify the length of the defrost cycle factory setting 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 180 Upto630 Up to 930 Up to 3 30 165 630 7 990 40 3304 150 7 8 3 315 10 11 4 430 135 8 9 315 990 11 12 490 5 120 9 1030 3
39. nding Replace valve Incorrect discharge pressure Inoperative condenser sensor Inoperative P C Board Water regulating valve misadjusted AC 125 175 225 only Replace sensor Replace P C Board Adjust its setting stem Excessive water in unit base Water tubing leaking Check Tighten or replace Page 40 MAINTENANCE AND CLEANING INSTRUCTIONS A GENERAL The periods andthe procedures for maintenance and cleaning are given as guides and are not to be construed as absolute or invariable Cleaning especially will vary 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 in side to side and in front to rear directions 3 Clean the water system evaporator bin and spray jets using a solution of SCOTSMAN Ice Machine Cleaner Refer to procedure C cleaning instructions and after cleaning will indicate frequency and proce dure to be followed in local areas NOTE Cleaning requirements vary according to the local water conditions and individual user operation Continuous check of the clarity of ice cubes and visual inspection of the water spraying parts before and aft
40. nds the ice machine stops with the glowing up of the Bin Full YELLOW LED to monitor the situation of ice bin full Page 31 The 60 seconds of delay prevent that an ice scoop movement 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 32mA 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 with ten keys of one push button of input terminals 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
41. nimum 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 15 the unit level IMPORTANT 4 Have all the electrical and plumbing connections been made and is the water supply shut off valve open 5 Has the voltage been tested and checked against the data plate rating 6 Has the water supply pressure been checked to ensure a water pressure of at least 1 bar 14 psi 7 Check all refrigerant lines and conduit lines to guard against vibrations and possible failure Page 19 8 Have the bolts holding the compressor down 11 Hasthe Manufacturer s registration card been checked to ensure that the compressor is been filled in properly Check for correct snugly fitted onto the mounting pads model and serial number against the serial 9 Have the bin liner and cabinet been wiped e anid mall ThicTegistreton Gare yo clean actory 10 Has the owner user been given the User 12 Has the owner been given name and Manual and been instructed on the importance of the phone number of the authorized periodic maintenance checks SCOTSMAN Service Agency serving him G INSTALLATION PRACTICE Hand shut off valve Water filter Water supply line flexible hose 3 4 male fitting Vented drain Open trapped vented drain Drain fitting Main switch Can oapran gt Power line WARNING This icemaker is not designed for outdoor installation an
42. perature to restart the machine it is necessary to unplug wait few seconds and plug in 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 1 bar 14 psig 2 5 bar 35 psi on AC 225 then it Page 28 declines gradually in relation with the growing of the ice thickness to reach at the end of the cycle approx 0 0 1 bar 0 0 3 psig 1 7 bar 24 psi on AC 225 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 E and G 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 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 not adjustable is related to the length of the second phase of freezing cycle T2 Time to drop the evaporating temperature from 0 C 32 F small Red LED blinking to 15 C 5 F small Red LED ON steady
43. sion The fan motor is controlled through the P C BOARD andthe TRIAC by the condenser tempe rature sensor Normally it operates only during the freezing cycle to draw cooling air through the condenser fins Inthe 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 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 It compresses the low pressure refrigerant vapor causing its temperature to rise andbecome high pressure hot vapor which is then released through the discharge valve N HIPRESSURE CONTROL AC 45 55 85 105 Water cooled version Used only onthe water cooled versions it operates to keep between 9 5 and 10 5 bars 135 150 psig the hi side or discharge pressure of the refrigerant system by energizing the coil of the water inlet solenoid valve that control the cooling water flow to the condenser O WATER REGULATING VALVE AC 125 175 225 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 P CONTACTOR AC 125 175 225 Placed outside of the control box it is controlled by the P C BOARD in order to close or op
44. spray system is correctly seated and that the water jets uniformely reach the interior of the inve rted mold cups also make sure thatthe plastic curtain is hanging freely and there is not excessiv e water spilling through it BIN TEMPERATURE SENSORS COMPRESSOR EVAPORATOR CONDENSER ws ELECTR TIMER DATA PROCESSOR FAN MOTOR Pe OS WATER PUMP Do r Oo WATER DRAIN VALVE CONTACTOR COIL 9 ELECTRONIC CARD Page 23 G Theicemakingprocesstakes 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 alow 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 lenght of the entire freezing cycle is governed by the evaporator temperature 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 The timer adjustment is factory set in consideration of the ice maker type cooling version and ice cube size Small Medi
45. ssures NOTE On air cooled models the condenser temperature sensor which is located within the condenser fins keep the head condensing pressure between 8 5 and 9 5 bar 110 130 psig 15 17 bar 220 245 psi on AC 225 Incase 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 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 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 sump tank EVAPORATOR j P CONDENSER ELECTR TIMER lt 26 m COMPRESSOR WATER DRAIN VALVE ELECTRONIC CARD Page 22 BIN TEMPERATURE SENSORS COMPRESSOR EVAPORATOR CONDENSER WATER DRAIN VALVE ELECTRONIC CARD F Check to see through the ice discharge opening that the
46. teel 160 1 2 28 AC 125 WS Water S Steel 680 Electr power cons Basic electr Amps Start Amps Watts Kwh per 24 Hrs No of Wires Amp Fuse 230 50 1 3 8 20 670 13 3 x 1 5 mm 10 Cubes per harvest 36 large 48 medium 84 small At 15 C water temperature Page 13 SPECIFICATIONS ELECTRONIC CUBER MODEL AC 175 Important operating requirements MIN MAX Air temperature 10 50 F 40 100 F Water temperature 5 C 40 F 40 C 100 F Water pressure 1 bar 14 psi 5 bar 70 psi Electr voltage variations from voltage rating specified on nameplate 10 10 AIR COOLED MODELS WATER COOLED MODELS Kg C Kg AG 87 5 95 85 l d 92 5 82 5 A u 3 90 g g 80 T 875 21 amp 775 E d s lt a a fan ui 75 ui 825 a 32 a a 32 a a 725 80 70 77 5 5 38 gt 38 E Q 675 a 75 lt 2 65 E 2 72 5 m m 62 5 gt ii 70 z gt lt lt 60 67 5 57 5 65 32 27 21 15 10 C 32 27 21 15 10 C WATER TEMPERATURE WATER TEMPERATURE NOTE With the unit in built in conditions the ice production is gradually reduced in respect to the levels shown in the graf up to a maximum of 10 at room temperatures higher than 32 C The daily ice making capacity is directly related to the condenser air inlet temperature water temperature and age of the ma
47. temperature 5 C 40 F 40 C 100 F Water pressure 1 bar 14 psi 5 bar 70 psi Electr voltage variations from voltage rating specified on nameplate 10 10 AIR COOLED MODELS WATER COOLED MODELS Kg C Kg C 150 160 145 10 155 a 140 ul 5 150 10 ul us 5 d 5 a a c 130 c 140 5 L LI L Lu a 125 3 a a 135 a Q m 120 B 130 2 115 125 Q n 3 amp Q 1 a A 108 g BET 9 100 lt 110 lt 95 105 90 100 85 95 32 27 21 15 10 C 32 27 21 15 10 C WATER TEMPERATURE WATER TEMPERATURE NOTE The daily ice making capacity is directly related to the condenser air inlet temperature water temperature and age of the machine To keep your SCOTSMAN CUBER at peak performance levels periodic maintenance checks must be carried out as indicated on page 40 of this manual Production charts shown indicate the production of ACM models ice production of ACL and ACS models is 10 lower Page 16 1 19 32 622 24 31 64 MIN FOR UTILITY CONNECTIONS SPECIFICATIONS CONT D 2 41 25 64 152 5 63 64 500 19 11 16 675 24 5 16 5 B a a e 3 4 3 4 GAS WATER OUTLET WATER COOLED ONLY 3 4 GAS 3 4 G
48. the air cooled version being controlled by the temperature sensor probe located withinthe 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 cooled versions for one of the following reasons CLOGGED CONDENSER Aircooled 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 warning the user of the Hi Temperature situation After having eliminated the source of the condenser hi tem
49. the combination of the first four DIP SWITCH KEYS and check the corrisponding length of freezing cycle 2nd phase on Table B 3 Set the same DIP SWITCH KEYS to correspond to the 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 I 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 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 Page 34 SMALL IDENTATION LITTLE OR NO ICE IN CENTER OF CUBES THICK BULGE SOLID ICE Page 35 WIRING DIAGRAM AC 45 55 85 105 AIR amp WATER COOLED 230 50 60 1 LED PRINTED CIRCUIT BOARD PUSH 2 TO 5 SEC DURING WATER FILLING FOR CLEANING PUSH MORE THEN 5 SEC DURING FILLING FOR B
50. um 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 H After about 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 CONTACTOR COIL AC 125 175 225 only WATER INLET VALVE HOT GAS VALVE WATER DRAIN VALVE and the WATER PUMP on the first 15 seconds on all models except the AC 225 30 seconds NOTE The lenght of the defrost cycle not adjustable 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 l 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 EVAPORATOR pre CONDENSER MEN Jm OF ELECTR lt O TIMER LLI ga e a
51. ver 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 of WARNING 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 tempe rature 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 of the 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 temperature In case the condenser temperature rises and reaches 70 C 160 F on air cooled models or 60 C 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 C 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 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 seco
52. 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 All water coming from the overflow is collected inside the Sealed Water Reservoir As soonas the water reaches its maximum level the Water Drain Pump is energized for 8 seconds pumping out most of the water contained into the Sealed Water Reservoir u EVAPORATOR o LZ 2L gt los CONDENSER jann a L Zo O 15 lt a LLI a LI Rx Tx m O 0 2 N BEN TRANSF COMPRESSOR WATER DRAIN VALVE ELECTRONIC CARD Page 21 D At completion of the water filling phase 5 minutes the unit passes automatically into the freezing cycle with the start up of COMPRESSOR CONTACTOR COIL AC 125 175 225 only WATER PUMP FAN MOTOR in air cooled version controlled by the condensing temperature sensor located within the condenser fins Fig 2 OPERATIONAL CHECKS E Install if required the refrigerant service gauges on both the high side and low side Scraeder valves to check the compressor head and suction pre
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