MF/MFN 88 - Scotsman
Contents
1. Scotsman SERVICE MANUAL Scotsman WEBSHOP NL Ice Systems WAAROM ZOU JE MEER BETALEN ME MFN 88 Modular superflaker nugget split SCOTSMAN EUROPE FRIMONT SPA Via Puccini 22 20010 Pogliano M se Milano Italy 1 Tel 39 02 93960 1 Aut Sel Telefax 39 02 93550500 ad Direct Line to Service amp Parts Ic Phone 39 02 93960350 Fax 39 02 93540449 ly Website www scotsman ice com 900 E Mail scotsman europe frimont it 0085 MS 1000 28 REV 06 2014 Scotsman webshop nl TO BE USED JUST BY THE INSTALLER Page 3 TABLE OF Table of contents page CONTENTS Specifications 4 Section GENERAL INFORMATION AND INSTALLATION Introduction Description Sealed refrigerant system Storage bin or ice room Unpacking and ilnspection Location and levelling Electrical connection Water supply and drain connection Final check list CONNDD O O O Section Il OPERATING INSTRUCTIONS Pre start inspection 8 Start up Section lll PRINCIPLES OF OPERATION HOW IT WORKS ICE MAKER 9 Water 9 Ice 9 Refrigeration 9 ELECTRICAL REFRIGERATION 10 Section IV ADJUSTMENT REMOVAL amp REPLACEMENT PROCEDURES 12 Section V SERVICE DIAGNOSIS 15 Section VI WIRING DIAGRAMS 17 Wiring Diagram MF MFN 88 18 Section VII MAINTENANCE AND CLEANING INSTRUCTIONS 19 Scotsman webshop nl Page 4 SPECIFICATIONS MF MFN 88 Important operating requirements MINIMUM MAXIM2. KA3 DRIVE MOTOR START RELAY E E D 51 x 5 g KM2 DRIVE MOTOR CONTACTOR 5 re ae 4 LIQUID VALVE DELAY 2 KT2 DRIVE MOTOR TIMER DELAY mn Lacan M2 DRIVE MOTOR x 5 s s 9 5 2 N 5 1 RESET PUSH BUTTON E e eng SP3 WATER PRESSURE CONTROL 4 3 z 9 M 2 m z STi THERMOSTAT o x E TM2 DRIVE MOTOR TERMAL PROTECTION 5 LIQUID VALVE vba 6 Q 1 ES d EQ 2 kei 4 PE H s M at rz UX 4 2 9 M ex 2 ai S ee m a x 4 gt alae ES x e ef s x amp a AAA A Scotsman webshop nl Page 19 SECTION VII MAINTENANCE amp CLEANING INSTRUCTIONS GENERAL The periods and 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 conditions and the ice volume produced and each icemaker must be maintained individually in accordance with its own particular location requirements ICEMAKER THE FOLLOWING MAINTENANCE SHOULD BE SCHEDULED AT LEAST TWO TIMES PER YEAR ON THIS ICEMAKER CALL YOUR AUTHORIZED SCOTSMAN SERVICE AGENCY 1 Check and clean optional water line strainers or water purification system 2 Remove screws and top and front panel 3 Remove cover from water reservoir and depress the float to ensure that a full stream of water enters each reserv
3. bottom of freezer barrel You can heat the bearing retainer with a soft flame The bearing will drop out by itself NOTE 1 When installing the Bearing in the bearing retainer carefully tap a piece of wood positioned across the bearing to evenly seat the Bearing in the retainer 2 After assembling the ice breaker on the upper end of the Auger and BEFORE installing the Cap apply an ample coating of vary bond grease type Never Seez food grade H1 certified 20 C 150 C Grease P N 263612 00 to the upper part of the Bearing the Cap Screw and Washer Then install the Cap in place 6 REMOVAL AND REPLACEMENT OF THE FREEZER ASSEMBLY NOTE 1 The Cabinet may have to be removed from is permanents location especially if located in a corner in order to have access to the left side and rear of the Chassis 2 In addition to shutting OFF electrical power and inlet water to the icemaker be sure to disconnect the inlet water line BEFORE moving the icemaker from the permanent location 3 Always install a replacement Drier anytime the sealed refrigeration system is opened Do not replace the Drier until all other repair or replacement has been completed Scotsman webshop nl A To Remove the Freezer Assembly 1 Remove screws and left and right side rear panels 2 Referto procedure IV 12 and remove the Spout Assembly Ice Breaker and Auger 3 Remove Corbin clamp and Tygon tube from
4. evaporator The Water Seal a two part face seal the top half rotating with the auger the bottom half stationary the sealing action being where the two seal faces meet The Breaker where the ice is compressed and much of the extra water is squeezed out of it before it reaches the ice spout The Thrust Bearing Top bearing as the is pushed up the evaporator the auger is thrust down and pressure from the auger thrust is taken up by this bearing Scotsman webshop nl Page 12 SECTION IV ADJUSTMENT AND REMOVAL AND REPLACEMENT PROCEDURES The procedures provided in this Section are arranged in alphabetical order to make specific Adjustment and Removal and replacement information easy to locate Read the instructions throughly before performing any Adjustment or Removal and Replacement Procedures 1 ADJUSTMENT OF THE BIN THERMOSTAT CONTROL The control for the Bin Thermostat is the Tempe rature Control located in the Control Box Assembly 3 ADJUSTMENT OF THE AUTOMATIC EXPANSION VALVE This valve may be manually regulated by means of the adjusting stem Turning the adjustment to the left counter clockwise will increase the rate of refrigerant flow Turning the adjustment to the right clockwise the refrigerant flow to the evaporator is reduced Use hex head wrench for manual adjusting operations WARNING The adjusting screws on the Temperature Control device have very sensitive respo
5. slightly wet when formed but will cure rapidly to normal hardness in the bin 14 Check the bin thermostat control bulb hold ice on the control bulb of each system to test icemaker shut off NOTE The bin thermostat is factory se at 4 C differential and should keep the entire icemaker system shut off atleast 10 minutes in high ambient temperatures longer in low ambients temperature during normal operation Settings are 1 5 C CUT OUT and 4 C CUT IN 15 Check gear box oil level through its sight glass every 6 months Oil on low speed section must be replaced every 25 000 hrs Use Syntetic Oil Shell Tivela SC320 CLEANING 1 Remove screws and the top left and front panel 2 Disconnect unit from power supply 3 Removereservoir cover and block the float in water reservoir 4 Drain the water reservoir and freezer assembly using the drain tube attached to the freezer water inlet Return the drain tube to its normal upright position and replace the end cap WARNING 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 Scotsman webshop nl Page 20 5 Prepare cleaning solution Mix 1 liter of SCOTSMAN Ice Machine Cleaner with 10 liter
6. the three phase to the unit plug Short of one of the three phases Reverse two of them Check for proper power supply 6th Warning light glows Cut OFF at Drive Motor Current Relay Auger rubbing in freezer barrell Freezer barrell scored Auger bearing seized Gear box seized No lubricant Freeze up Drive motor running on reverse Remove auger to check situation smooth freezer barrel and auger spiral with send paper or replace them Replace bearing Add lubricant or replace gear box Melt ice in freezer and remove ice breaker and auger to check cause of freezer up Interchange connection wires Scotsman webshop nl Page 16 SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION Excessive noise Gear reducer loose on frame Drive motor end play or worn bearings Water level in evaporator too low Tighten Repair or replace Set water level correctly Water leaks Damaged water seal Gravity feed line leaking Water level in reservoir too high Replace seal Check hose clamp Adjust water level Making wet ice Surrounging air temperature above 40 C 100 F Under or over charge of refrigerant Closed AEV Float ball full of water Correct or move unit to cooled location Re charge with proper amount Adjust valve for correc refrigerant flow Replace Low ice production Loss of refrigerant under or overcharge of refr
7. 7 B 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 FINAL CHECK LIST 1 15 the Cabinet level IMPORTANT 2 Have all electrical and piping connections been made 3 there an electrical service disconnect within sight of the installed machine Hasthe voltage been tested and checked against the nameplate rating 4 sthewatersupply line shutoff valve installed near the machine 5 Have all the wires been checked for looseness and thightness 6 Has the owner user been instructed on how to operate the Icemaker 7 Has the Manufacturer s registration Card been properly filled out Check for correct Model and serial numbers from Serial nameplate then mailthe completed card to the FRIMONT factory 8 Checkall refrigerant linea and conduit lines to guard against vibration or rubbing and possible failure 9 Is there at last 20 cm clearance behind and around Cabinet for proper air circulation 10 Isthe Icemaker installed indoor in a location where ambient temperatures are a Minimum of 10 C 50 degrees F all year around 11 Haswatersupply pressure been checked to insure a minimum of 1 atm 14 PSI 12 Verify that unit lighted switch is in the OFF position 13 Has the owner been given name and telephone number ofthe authorized SCOTSMAN Service Agency Scotsman webshop nl Page 8 SECTION ll OPERATING
8. INSTRUCTIONS PRE START INSPECTION Verify that drive motor current limiter GAVAZZI DIB71 KA1 located in control box on side of contactor KM2 has the following setting MF 88 400V 230V HYS 6 6 LEVEL 60 1 2 Amps 50 2 5 Amps DELAY 2 sec 2 sec MFN 88 400V 230V HYS 6 LEVEL 100 2 Amps DELAY 2 sec Dip switch under cover 400 V all in ON position 230 V dip Sw 1 in OFF position 2 gt 6 in ON position START UP The following procedure can onlybe started after pre startinspectionhasbeenproperly completed 1 Open the water supply line shutoff valve Observe that water enters the water reservoir fills the tube from the reservoir to the evaporator and then shut off Check for leaks Scotsman webshop nl NOTE The MF MFN 88 is equipped with a 3 Phase Monitoring Relay F1 In case the three phase are connected in wrong way the machine doesn t start with the simultaneous glowing of the 3 Phase Sequence Protector Warning light Just reverse two of the three phases on the main plug so to have the correct sequence and by so the start up of the machine 2 After having properly connected the unit to any rack system or dedicated condensing unit 15 minutes later after the start up of the drive motor yellow led of the Time Delay Relay KT1 blinking the liquid valve opens 3 After two or three minutes of unit operation observe tha
9. UM Air temperature 10 C 50 F 40 C 100 F Water temperature 5 C 40 F 35 C 100 F Water pressures 1 bar 5 bar Electrical voltage variation voltage rating specified on nameplate 10 10 Extended periods of operation exceeding these limitations constitutes misuse under the terms of Scotsman Manufacturer s Limited Warranty resulting in a loss of warranty coverage We reserve the right to make product improvement at any time Specifications and design are subject to change without notice ice making capacity AIR COOLED MODELS AIR COOLED MODELS AIR COOLED MODELS Kg C Kg C Kg C 2500 1900 10 1950 10 10 1850 21 2400 1850 1800 2300 1750 21 _ 1750 32 2200 170 cE 1650 sg t N 2100 32 T CN 1690 gt CY 1550 E i d a ui a 1600 ui n ui gj 2000 gt isso fo gt o iu ii gt 3 gt Q 1900 E C 1500 Q 1350 38 o z o 38 2 a 38 c Q 1800 m a 1450 Q 1250 m m 5 5 lt 2 1400 lt E lt 1700 1150 1350 1600 1300 1050 1500 1250 950 3 2 21 15 10 3 27 21 15 10 3 27 21 15 10 WATER TEMPERATURE WATER TEMPERATURE WATER TEMPERATURE NOTE Daily ice capacity is directly related to condenser air and water inlet temperature water temperature to make ice and age of machine To keep you
10. ch the ice maker will be located be on a solid footing and supports at least 700 Kgs This ice maker is designed for free standing application only Do not built itin Make sure that location site is well ventilated to ensure correct operation Also allow 20 cm clearence in back and both side of the ice maker to be able to easily perform service inspections and operations 1 Erection For elevation of machine to its stand or location fork lifttrucks should be used 2 Position the MF MFN 88 in the selected permanent location and level the cabinet on both the left to right anf front to rear direction 3 Icechute to convey the ice from the outlet of the machine to the ice storage area is supplied with the machine 4 Thermostat capillary tube must be positio ned so that its end extends out the ice chute opening or the ice deflector and get easily in contact with the cone formed by the ice deposited in the storage room before anyway that ice builds up in the chute Thermostat capillary tube is coiled behind the control box it must be routed to follow the ice chute or ice deflector and protrude for a certain extension beyond the ice discharge opening in the storage room Use caution when routing this capillary to prevent kink or to bent it excessively Coil excess capillary inside ice maker cabinet Tape coil to prevent vibration againt another part ELECTRICAL CONNECTION See machine electrical specifications in Unit Na
11. d within a compact cabinet entirely in stainless steel The flake ice produced is extruded through an ice discharge opening All panels are removable to allow easy access to electrical and mechanical components for cleaning and maintenance SEALED REFRIGERANT SYSTEM The freezer augeris driven by a gear motor assy The refrigerant used is R 404 A controlled by an automatic expansion valve STORAGE BIN OR ICE ROOM Since the MF MFN 88 is a continuous flow type ice maker and does not have its own attached storage bin itis necessary to use an auxiliary bin or prefabricated ice room for appropriate ice storage An insulated ice storage bin or room is always required then according to ice applications this can be refrigerated or non refrigerated a weight volume ratio of 1 8 m per ton must be taken into consideration for correct ice storage room design which in any case should be dimensioned to accomodate a minimum of 16 hrs ice production UNPACKING AND INSPECTION 1 Call your authorized SCOTSMAN Distributor or Dealer for proper installation 2 Visually inspect the exterior of the shipping container and skid and any severe damage noted should be reportedto the delivering carrier and a concealed damage claim filled in subjetct to internal inspection with carrier representative present 3 Remove the packing andthe shipping base or skid 4 Remove screws and shipping tape and service panels from the cabinet and
12. ed pressure plate The spout switch acts as a back up safety switch should the termostatic Control Bulb fail and cause ice to jam upin the ice spout The switch will shutoff the ice maker when actuated The Spout Switch can be manually tested by pressing upward the pressure plate There are other safety controls in the machine and are Liquid Line Solenoid Valve Necessary to stop refrigerant flow when not desired to be located on the liquid line past the drier is electrically connected to compressor contactor or relay to stopflooding the evaporator and suctionside during compressor off periods Supplied The low water pressure Switch functions to discontinue the ice making process whenever incoming water pressure is reduced to below 0 3 bar 4 PSI The switch will automatically restart the icemaking process when the water pressure is increased to 1 bar 14 PSI EPR valve Evaporator Pressure Regulating Valve this valve maintains a constant pressure on evap Inlet regardless of the pressure on the outlet so it keeps the evaporator temperature above a pre determined value preventing dangerous freeze up conditions KVP Sight Glass Asight glass is intalled in the liquid line The sight glass will show bubbles if the system is low on refrigerant Solenoid valve delay timer KT1 Delays the opening of the liquid valve by 15 at every start up of the ice maker Gear motor delay timer KT2 Delays gear motor STOP by 15 atevery t
13. hen temporarily secure the Freezer Assembly out of the way to allow room to work 16 Unloose and remove the four screws that secure the bottom flange to the worm tube 17 Push out to remove the seal ring 18 Remove the clip ring and the bearing from the bearing retainer 19 Inspect the lower half of the Water Seal If reusable use care to protect it from dirt etc prior to replacement procedure 20 Inspect the lower Bearing and if the Bearing is dry replace it with a new one 21 Inspect the O ring of lower bearing retainer eventually replace it with a new one 22 Reach through the Adaptor and remove the Coupling for inspection 23 Check the Coupling for cracks chipping and excessive wear B To replace the Auger Water Seal Bearings and Coupling reverse the removal procedure NOTE 1 Any time the Auger is removed for replacement or for the inspection and replacement of the Bearing or Coupling use extra care in handling the Water Seal parts so no dirt or foreign matter are deposited on the surfaces of the Seal 2 If there is any doubt about the effectiveness of the Water Seal or O Ring REPLACE THEM A dirty worn or faulty Water Seal or O Ring will cause a leak and ultimately require a second time consuming removal and replacement procedure to be performed that COULD HAVE BEEN PREVENTED 3 Lower bearing or water seal should be removed by pulling out the bearing retainer from the
14. hrough the enters at the Cabinet fitting and on to the Water Reservoir The water Reservoir functions to maintain a constantwater level inside the Freezer Assembly Water from the Water Reservoir enters at the bottom of the freezer Assembly and is changed into ice by low temperatures inside the freezer Ice A stainless steel Auger within the Freezer is powered by a separate drive motor through a speed reducer and the rotating Auger carriers the ice upward to the Ice Breaker assy where excess water is pressed out of the ice as it is extruded or flaked out through the Ice breaker The flake ice into spout in diverted out through the ice discharge opening Once unit is electrically connected after 15 minutes starts the automatic and continuous icemaking process When the Ice touches the Thermostatic Control Bulb the sensing bulb shuts off the compressor first and 15 minutes later the drive motor Refrigeration At beginning the refrigerant R 404 A is compres sed by the compressor into a high temperature gas The discharge line directs this gas to the condenser Atthe condenser air or water cooled the gas is cooled by either air or water and it then condenses into liquid This high pressure liquid then goes through the liquid line to the expansion valve The expansion valve meters liquid refrigerant into the evaporator Atthe evaporator the refrigerant enters an area of relatively low pressure where it can easily boil off o
15. igerant Low water level in the reservoir Overcharge of oil in system Check and recharge with proper amount of refrigerant Check float valve operation Check at oil sight glass Lower to 1 2 sight glass Gear box noise Low on lubricant Remove filling plug and add synthetic Oil Scotsman webshop nl Page 17 SECTION VI WIRING DIAGRAMS This section isprovided as an aidinunderstanding the electrical circuit of the MF MFN 88 The Wiring Diagrams in this Sections is Wiring diagram MF MFN 88 AS 400 50 3 N WARNING When conducting a conti nuity check of the MF MFN 88 1 Disconnect the main power source 2 DO NOT use an incandescent lamp or jumper wire conduct all tests with a voltohm meter Scotsman webshop nl Page 18 WIRING DIAGRAM MF MFN 88 s ME LEGEND t Fi 3 PHASE MONITORING RELAY 1 SPOUT SWITCH EN zoe FU1 FUSE e HL1 POWER ON EROR z2 4 HL4 WATER ALARM 2 Z abi A x HL5 SPOUT SWITCH LIGHT HL6 BIN FULL p z 8 a HL7 WRONG PHASEALARM ie lt x HL8 CURRENT DRIVE MOTOR ALARM 1 CURRENT DRIVE MOTOR RELAY E ef eE E amp J
16. inspect for any concealed damage Notify carrier of any concealed damage claims as stated in step 2 above Scotsman webshop nl 5 Remove all internal support packing tape and wires in machinery compartment 6 Check that refrigerant lines do not rub or touch lines or other surfaces and that fan blades if any move freely 7 Use clean damp cloth or disposable paper wiper to pipe clean the exterior surfaces of the cabinets 8 See DATAPLATE on the cabinet base and check that the location source voltage cor responds with the voltage specified on the dateplate CAUTION Unproper voltage supplied to the ice Maker will void your parts replacement program 9 Remove the Manufacturers Registration Card from the User Manual and fill in all spaces including Model Number and Serial Number taken from the aluminium plate Forward the completed self addressed registration card to the Frimont Factory LOCATION AND LEVELLING WARNING This unit must be installed in an area where it will not freeze and protected fromthe elements such as wind rain water spray or drip Ambient tempe rature limitations are 10 C 50 F minimum and 40 C 100 F maximum while water temperature limitation are 5 C 40 F minimum and 35 C 90 F maximum Ambient and water tempera ture exceeding these limitations may result in machine malfunction and the loss of warranty coverage Make sure that the structure on whi
17. meplate and at page 5 of this Service Manual to determine wire size to be used for electrical supply This unit must be grounded according to all Electrical Codes andlocal ordinances Provide a fuse disconnect box within sight and easy reach of the ice maker Use timed fuses on all terminals The maximum allowable voltage variations should not exceed ten percent of the nameplate rating even under starting conditions Low voltages can cause erratic operation and may be responsible for serious damages to the overload switch and motor winding WATER SUPPLY AND DRAIN CONNECTIONS A The recommended water supply line is a 3 4 inch O D fitting Connect to cold water supply line with standard plumbing fittings with a shutoff valve installed in an accessible place between the water supply and the Cabinet In some cases a plumbing permit and services of a licensed plumber will be required CAUTION This ice maker is equipped with a low water pressure safety device which in the event of low water pressure will automatically stop the ice maker to prevent damage The ice maker will automatically restart with increased water pressure This ice maker will not operate properly when water supply temperatures are below 5 C 40 F and above 35 C 90 F NOTE Water supply must be installed to conform with local plumbing codes In some cases a plumbing permit and services of a licensed plumber will be required Page
18. nse to adjustment Over adjusting or erratic guessing can foul the instrument and cause ultimate delay and part replacement WHICH COULD HAVE BEEN PREVENTED Factory settings is 1 5 C cut out and 4 G cut in 2 ADJUSTMENT OF THE WATER LEVEL INTO THE FREEZER CHAMBER The correct Water Level inthe Freezer Chamber is about 2 cm 3 4 inch below the ice discharge opening Low Water Level causes excessive strain inside the Freezer Assembly due to a faster freezing rate When the Water Level is above or below the correct level adjustment can be performed to RAISE or LOWER the Water Level by raising or lowering the Water Reservoir and its Mounting Brackets A To RAISE the Water Level loosen and removethetwo screws which attach the Mounting Bracket of the Water Reservoir to the frame and raisethe Water Reservoir Assembly ofthe desired amount then thread the screws in the corresponding holes and tighten B To LOWER the water Level loosen and removethetwo screws which attach the Mounting Bracket of the Water Reservoir to the frame and lower the Water Reservoir Assembly of the desired amount then thread the screws in the corresponding holes and tighten NOTE A These are general steps to be followed at first when removing any part of any refrigeration system which are in summary a Store the refrigerant charge in compressor crankcase b Remove all refrigerant from part to be opened c Balance pressures in pa
19. oir 4 Check that the icemaker cabinet is level in side to side and front to rear directions 5 Check that the water level in water reservoir is below the overflow and is level to correspond 20 m m below the ice discharge opening 6 Clean water reservoir and interior of the freezer assembly using a solution of SCOTSMAN Ice Machine Cleaner Refer to CLEANING Icemaker NOTE Cleaning requirements vary according to local water conditions and individual user operation Visual inspection of the auger before and after cleaning will indicate frequency and procedure to be followed in local areas 7 When doubtful about refrigerant charge install refrigerant gauges on Service valves and check gauge See Nameplate for refrigerant charge specifications at liquid line will be 1 7 Bar 24 PSI 8 Check drive motor operation Normal operating temperatures about 70 which is hotto touch Check with Ammeter amps drawn and make sure they are inthe limits of Drive motor windings 9 Checksetting andfunctionofallthe pressure controls also make sure that their corresponding light will glow 10 Inspect the top bearing in the ice breaker wipe clean of old grease and apply a coating of food grade grease SCOTSMAN P N 263612 00 or equivalent 11 Check for refrigerant leaks 12 Check for water leaks Pour water down drain line to be sure that drain line is open and clear 13 Check the quality of ice Ice should be
20. otsman webshop nl Page 14 5 Remove the Water Reservoir Assembly from the mounting bracket B Toreplacethe Water Reservoir Assembly reverse the removal procedure NOTE Check that the installed replacement Water Reservoir Assembly float moves freely 8 REMOVAL AND REPLACEMENT OF THE DRIVE MOTOR A To remove the drive motor assembly 1 Remove screws and front and left side panels 2 Disconnect wire leads to motor 3 Remove four hex head bolts lockwashers and washer which attach the motor to the gear reducer 4 Remove the drive motor out of the gear reducer B To replace the drive Motor reverse the removal procedure 9 REMOVAL AND REPLACEMENT OF GEAR BOX A Remove screws and all service panels 1 Remove four nuts and washers which hold the gear box adaptor to the evaporator assembly 2 Unloose and remove screws securing upper evaporator bracket to left side chassis 3 With a small hydraulic Hoist raise the evaporator assembly to facilitate removal of entire gear box 4 Unloose and remove four nuts holding the gear box to unit base The gear box is now loose and can be removed Do not tilt to avoid oil spillage NOTE Gear box is supplied with the drive motor already in place B Toremount Gear Box assembly reverse the removal procedure taking careto position correctly the output shaft with its keys well in shape Page 15 The Service Diagnosis Sections is fo
21. r evaporate Drier m Hi V o i JN Expansion valve MW WWE gt m m S Tdndenser y Kin dm 4 We S 2 h a I i Sight glass li Heat exchanger 9 E i Compressor Scotsman webshop nl As it evaporates it absorbs heat from the evaporator and whatever is in contact with it such as the water inside it After the evaporator the refrigerant now a low pressure vapor goes through the heat exchanger and suction line back to compressor where the cycle is repeated ELECTRICAL REFRIGERATION The MF MFN 88 Flakers are designed to operate at 400 Volts 50 Hertz threephase plus neutral Special voltage requirements are available on special order Therefore always CHECK NAMEPLATE for electrical information BEFORE proceeding with electrical wiring connections to the Icemaker Cold ambient temperatures and interruptions in water supply are conditions that can cause excessively hard ice and overloads within the Freezer Assembly which is directly trasmmitted to the Drivemotor and in turn will cause the intervention of Drive Motor Current limiter Spout Switch is mounted on the top of the Ice Spout and is actuated by the movement of the spring retain
22. r machine performing at its maximum capacity it is necessary to perform periodic maintenance as outlined on Maintenance amp Cleaning Section of this manual Scotsman webshop nl Page 5 SPECIFICATIONS CONT D 1069 42 1 16 1255 49 6 16 2 E e 6206 3 8 s 3 8 i a a ETE 16 5 8 2500 21 1 4 Dimensions HEIGHT 1140 mm HEIGHT with legs 1290 mm WIDTH 540 mm DEPTH 780 mm NET WEIGHT 250 Kg MF MFN 88 SPLIT MACHINE SPECIFICATIONS k Cooling Reg Basic electrical Fuse Size Refrigerant Drive Motor at 25 C 35 C Ice Type 230 50 3N 2 65 Amps 1410 rpm 7740 Kcal hr SUPER R404a 9000 W FLAKE 400 50 3N 5A 1 53 Amps 1410 rom 30700 Btu h NUGGET Scotsman webshop nl Page 6 SECTION I GENERAL INFORMATION amp INSTALLATION INTRODUCTION This manual provides the specifications and the step by stepprocedures forthe installation start up operation and maintenance and cleaning of the SCOTSMAN Model MF MFN 88 The Model MF MFN 88 is a quality designed engineered constructed and throughly tested icemaking system providing the utmost in flexibility to fit the needs of a particular user DESCRIPTION The Scotsman MF MFN 88 continuous flow ice maker consists of one large capacity flake ice making system containe
23. r use in aiding the servicemen in diagnosing a particular problem for pin point the area in which the problems lies thus an ever available reference for proper corrective action SECTION V SERVICE DIAGNOSIS 1 ICE MAKING REFRIGERATION SYSTEM The following chart lists corrective actions for the causes of known symptoms of certain problems that can occur in the ice makingrefrigeration system SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION 2nd Warning Light glows Lo water pressure Intermittent water supply or too low water pressure Water shut off valve closed Check and clean water strainer The unit does not make ice Drive coupling worn or splitted Gear in gear box stripped Water not entering freezer assy Unloose and pull ont gear box and change coupling Check and replace Check water line from reservoir to freezer Green Light is off Unit will not run Loose electrical connection Inoperative master switch Check wiring Replace switch 3rd Warning light glows Ice inside the plastic spout Inoperative Spout Switch Remove it and check reason why Replace it 4th Warning light glows Ice in contact with the bin thermostat bulb Bin thermostat out of order Machine located in a very cold room temperature Remove it and check reason why Replace it Move it to a warmer place min room temp 10 C 5th Warning light glows Wrong connection of
24. rip OFF of the ice maker 3 phases monitoring relay F1 Onthe powerin ofthe machine check and assure correct Wiring rotation of the gear motor Scotsman webshop nl Page 10 Drive Motor Current Relay Gavazzi DIB71 KA1 It senses the intensity at the drive motor should this exceed its Amps setting point as per here below chart tripping OFF the entire machine MF 88 400V 230V HYS 6 6 LEVEL 6096 1 2 Amps 50 2 5 Amps DELAY 2 sec 2 sec MFN 88 400V 230V HYS 6 LEVEL 10096 2 Amps DELAY 2 sec Dip switch under cover 400 V all in ON position 230 V dip Sw 1 in OFF position 2 gt 6 in ON position CONTROL CONSOLE Located on the front panel is a virtual control console that monitors unit performance auto matically Any interruption or significant reduction in water or electrical supplies causes an instant stop to the operation of the modular flaker At the same time a warning light is activated on the control console telling the user of the ice makers stoppage and also the reason why Whenever any stoppage accured its cause should be diagnosed and corrected the cause of the stoppage should be diagnosed and corrected also the reason why IN OPERATION LOW WATER PRESSURE SPOUT SWITCH O BIN FULL O PHASES CTL O DRIVE MOTOR RELAY The Drive Motor Bonfiglioli mod BN80A4 0 55 Kw Volts 230 400 Ph 3 Hz 50 Amps 2 65 1 53 RPM 1410
25. rts just evacuated d Isolate parts to be opened from the rest of the system e Clean and dry joints to be broken f All refrigerant openings should be immediately plugged as soon as they are opened g Upon reassembling it is necessary to remove all the air moisture from the lines and whatever part that has been open to WARNING Be sure the electrical power supply and the water supply are OFF before starting any of the following REMOVAL AND REPLACEMENT procedures as a precaution to prevent possible personal injury or damage to equipment Scotsman webshop nl 4 REMOVAL OF EXPANSION VALVE A To remove the expansion valve 1 Remove screws and service panels 2 Close service valves on liquid line 3 Run the compressor for a moment until the evaporator coil has no liquid refrigerant in it 4 With the compressor idling equilize the pressure by cracking the liquid line service valve 5 Turn the suction service valve stem all the way in 6 Dry and clean the expansion valve accurately 7 Remove the liquid line and unbolt the valve 8 Seal refrigerant openings immediately B To replace the expansion valve reverse the removal procedures Page 13 5 REMOVAL AND REPLACEMENT OF THE AUGER WATER SEAL BEARINGS AND COUPLING A To Remove the Auger Water Seal Bearings and Coupling 1 Remove screws and the Front Panel and the Top Panel Shut close water supply Drain the wa
26. s warm water 6 Slowly pour the cleaning solution into water reservoir until it is full 7 Plus IN again the unit and after 15 minutes as the ice maker begins to use water from the reservoir continue to add more cleaning solution to maintain full reservoir if any has remained 8 Continue icemaking clearing ice from the spout until the water reservoir is empty DO NOT allow the icemaker to operate with empty reservoir 9 Unplug again the unit Scotsman webshop nl 10 Flush out the remaining cleaning solution from freezer as per step 4 Wash and rinse the water reservoir 11 Remove the block from the float inthe water reservoir and allow new fresh water to fill up the freezer Plus IN again the unit 12 Continue icemaking for at least 15 minutes to eliminate any remanent ofthe cleaning solution Check ice for acid taste continue icemaking until ice tastes sweet CAUTION DO NOT use ice produced from the cleaning solution Be sure none remains in the bin
27. t flaked ice begins to drop out in the ice spout 4 Letthesystemoperate for about 30 minutes Check for any excess noises beyond normal noise a Vibrating type from touching lines b Chattering lack of water in Freezer 5 lf desired the low side pressure can be checked it should be 1 7 atm 25 PSI Checkto see through liquid sight glass for correct refrigerant flow and charge 6 Evaporator pressure type KVP value opens at arise in pressure on the inlet side i e when the pressure in evaporator exceeds the set value 7 Holda handful of ice around the ice storage bin thermostatic control bulb to test shut off Less than one minute is about normal for bulb shut off function to cause the ice maker to stop Drive motor after 15 minutes delay yellow led of KT2 blinking Remember that unit will resume operation after 15 minutes that bin thermostat has closed its contacts 8 There are no adjustments to make so replace the panels 9 Throughly explain the owner user the significant specifications of the ice maker the start up operation and attention to pay going through the procedures in the operating instructions Answer all questions about the ice maker by the owner and inform the owner of the name and telephone number of the authorized SCOTSMAN Service Agency serving him Page 9 SECTION lli PRINCIPLES OF OPERATION How it Works ICEMAKER Water The water supply flows from the building source t
28. ter reservoir and freezer assy using the drain tube attached to the freezer water inlet 2 Remove the screws that secure the spout to the stop of the Freezer Assembly 3 Disconnect wires from micro box spout switch 4 Remove micro box and the spout assy 5 Remove center plastic cap that protects top bearing 6 Unloose and remove center bolt that secures the ice breaker to the auger 7 Unloose and remove 8 screws that hold the ice breaker to freezer barrel Two longer screws are used with freezer side bracket 8 Insert two of these screws into two threaded blind holes which must have no bottom on barrel and by evenly drawing them down ice breaker is lifted up 9 Grasp the ice breaker and lift it up entirely Worm shaft witt remain into the freezer worm tube 10 With arowhide mallet or a piece of wood placed on the bottom end of the top bearing tap the bottom of the bearing to break it loose to be pulled out from ice breaker 11 Clean away old grease and replace the O rings in the ice breaker 12 Insert in auger hub threaded hole an eyebolt of 16 m m in order to offer sufficient and positive hook for pulling out the auger 13 Lift and pull out the auger with the help eventually of a small hydraulic Hoist 14 Remove screws andlockwashers which attach the Freezer Assembly to the Adaptor on the Gear box 15 Raise the Freezer Assembly off of the Adaptor to gain access to the Bearing Retainer t
29. the Freezer Assembly that connects to the Water Reservoir Assembly 4 Perform operation at steps 2 3 4 5 at procedure IV 10 5 Disconnect suction line joint from the freezer 6 Unsolder the refrigerant inlet line at the freezer 7 Remove screws that secure bracket of freezer to the left side of chassis 8 Remove screws lock washers and washers which attach the bottom of the Freezer Assembly to the Adaptor on the Gear box 9 Lift the Freezer Assembly up and off of the Adaptor of Gear box NOTE Throughly evacuate the System to remove moisture and non condensables B Toreplace the Freezer Assembly reverse the removal procedure REMOVALAND REPLACEMENT OF THE WATER RESERVOIR ASSEMBLY A To remove the Water Reservoir Assembly 1 Remove screws and the left Panel and the Top Panel Close the Water Supply Drain water reservoir and freezer assy Using the drain tube attached to the freezer water inlet NOTE Be prepared with container or rags to catch water left in lines when lines are disconnected in next steps to prevent draining water on parts components electrical lines etc 2 Disconnect the water inlet tube from the Water Reservoir Assembly 3 Remove two corbin clamps and two tubes from the bottom of the water reservoir assy and damp all water in them by bending them down in a pail 4 Unscrew and remove the screws that secure the water reservoir bracket Sc
30. thermally protected Provides power through speed reducer to turn auger The Gear Reducer Bonfiglioli mod VF W49 110 Ratio 1 400 High and lo speed gear box are oil lubricated Oil Must be changed at LOW SPEED SECTION every 25 000 hours Use It 1 8 of Syntethic Oil only SHELL TIVELA OIL SC 320 Page 11 Thegearreduceris securely bolted on the chassis base and supports the freezing cylinder as well On its input shaft there is fitted the driving pulley A separate output shaft with double keys is fitted in the gear box bore and connected to the auger shaft via aluminium casting coupling The Bin Thermostat Ranco K 22 L 1075 must have its sensing capillary extended into ice room ina way that it could be contacted by the ice when storage ice room becomes filled It terminates ice production when its capillary gets in contact with ice It is wired in series with all other controls It is factory setto cut out at 1 5 C and cut in at 4 C The Expansion Valve is FLICA mod AMVX 3 Press 3 bar Office 4 5 mm for R 404 A meters the refrigerantto the evaporator serpentine at 1 7 bar 25 PSI Drive Motor Contactor Telemecanique LC1K09 with 4 N O contacts at 400V 9A with 230V 50 60 Hz coil The Evaporator a vertical stainless steel tube refrigerated and water filled In it there is a stainless steel auger and a water seal The Auger a stainless steel triple spiral auger it pushes the ice ribbon up to the top of the
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