SERVICE MANUAL MF 22 MF 30 MF 46 MF 56 MFE 61 R 134 A / R 404 A VERSION Electronic modular flakers and superflakers SCOTSMAN EUROPE - FRIMONT SPA Via Puccini, 22 - 20010 Pogliano M.se - Milano - Italy Tel. +39-02-93960.1 (Aut. Sel.)- Telefax +39-02-93550500 Direct Line to Service & Parts: Phone +39-02-93960350 - Fax +39-02-93540449 ISO 900 1-C Website: www.scotsman-ice.com ert. n. 0 080 E-Mail: scotsman.europe@frimont.it MS 1000.20 REV.
Page 1 TABLE OF CONTENTS Table of contents Specifications MF 22 page Specifications MF 30 Specifications MF 46 Specifications MF 56 Specifications MFE 61 1 2 4 6 8 10 GENERAL INFORMATION AND INSTALLATION Introduction Unpacking and Inspection - Ice maker Unpacking and Inspection - Storage bin Location and levelling Electrical connections Water supply and drain connections Final check list Installation practice 12 12 12 13 14 14 14 15 OPERATING INSTRUCTIONS Start up Operational checks 16 18 PRINCIPL
Page 2 SPECIFICATIONS ELECTRONIC MODULAR FLAKER MODEL MF 22 Important operating requirements: MIN • Air temperature 10°C (50°F) • Water temperature 5°C (40°F) • Water pressure 1 bar (14 psi) • Electr. voltage • variations from voltage • rating specified • on nameplate -10% MAX 40°C (100°F) 35°C (90°F) 5 bars (70 psi) +10% ice making capacity WATER COOLED MODELS 115 21 115 32 100 38 95 90 85 80 ICE PRODUCED PER 24 HRS.
Page 3 SPECIFICATIONS Dimensions: HEIGHT (less legs) HEIGHT (with legs) WIDTH DEPTH WEIGHT 525 mm. 542 mm. 560 mm. 533 mm. 49 Kg. MF 22 - MACHINE SPECIFICATIONS Model Cond. unit MF 22 AS MF 22 WS Basic electr. 230/50/1 Air Water Finish Comp. HP Water req. lt/24 HR S. Steel 3/8 120* 480* Amps Start Amps Watts Electric power cons. Kwh per 24 HR Nr. of wires Amps fuse 3.2 17 500 11 3 x 1.
Page 4 SPECIFICATIONS ELECTRONIC MODULAR FLAKER MODEL MF 30 Important operating requirements: MIN • Air temperature 10°C (50°F) • Water temperature 5°C (40°F) • Water pressure 1 bar (14 psi) • Electr. voltage • variations from voltage • rating specified • on nameplate -10% MAX 40°C (100°F) 35°C (90°F) 5 bars (70 psi) +10% ice making capacity 32 38 160 140 120 32 27 21 15 WATER TEMPERATURE 10 o°C 180 170 160 150 32 27 21 15 10 o°C WATER TEMPERATURE NOTE.
Page 5 SPECIFICATIONS Dimensions: HEIGHT (less legs) HEIGHT (with legs) WIDTH DEPTH WEIGHT 525 mm. 542 mm. 533 mm. 533 mm. 49 Kg. MF 30 - MACHINE SPECIFICATIONS Model MF 30 AS MF 30 WS Basic electr. 230/50/1 Cond. unit Finish Comp. HP Water req. lt/24 HR Air Water S. Steel 3/4 200* 850* Amps Start Amps Watts Electric power cons. Kwh per 24 HR Nr. of wires Amps fuse 4 20 760 17 3 x 1.
Page 6 SPECIFICATIONS ELECTRONIC MODULAR SUPERFLAKER MODEL MF 46 Important operating requirements: MIN • Air temperature 10°C (50°F) • Water temperature 5°C (40°F) • Water pressure 1 bar (14 psi) • Electr. voltage • variations from voltage • rating specified • on nameplate -10% MAX 40°C (100°F) 35°C (90°F) 5 bars (70 psi) +10% ice making capacity 10 21 310 290 270 32 250 38 230 210 27 21 15 WATER TEMPERATURE 10 o°C ICE PRODUCED PER 24 HRS. 330 190 32 Kg.
Page 7 SPECIFICATIONS Dimensions: HEIGHT (less legs) HEIGHT (with legs) WIDTH DEPTH WEIGHT 645 mm. 650 mm. 535 mm. 660 mm. 77 Kg. MF 46 - MACHINE SPECIFICATIONS Model MF 46 AS MF 46 WS Basic electr. 230/50/1 Cond. unit Finish Air Water S. Steel Comp. HP Water req. lt/24 HR 320* 1800* 1 Amps Start Amps Watts Electric power cons. Kwh per 24 HR Nr. of wires Amps fuse 5.2 29 1200 26 3 x 1.
Page 8 SPECIFICATIONS ELECTRONIC MODULAR SUPERFLAKER MODEL MF 56 Important operating requirements: MIN • Air temperature 10°C (50°F) • Water temperature 5°C (40°F) • Water pressure 1 bar (14 psi) • Electr. voltage • variations from voltage • rating specified • on nameplate -10% MAX 40°C (100°F) 35°C (90°F) 5 bars (70 psi) +10% ice making capacity 10 21 600 550 32 500 38 450 400 350 27 21 15 WATER TEMPERATURE 10 o°C ICE PRODUCED PER 24 HRS. 650 300 32 Kg.
Page 9 SPECIFICATIONS Dimensions: HEIGHT (less legs) HEIGHT (with legs) WIDTH DEPTH WEIGHT 785 mm. 790 mm. 535 mm. 660 mm. 93 Kg. MF 56 - MACHINE SPECIFICATIONS Model Cond. unit MF 56 AS MF 56 WS Basic electr. 230/50/1 400/50/3+N Air Water Amps Start Amps 10 4 34 22 * A 15°C water temperature Watts 2000 Finish Comp. HP Water req. lt/24 HR S. Steel 1.5 600* 3000* Electric power cons. Kwh per 24 HR 45 40 Nr. of wires Amps fuse 3 x 1.5 mm2 5 x 1.
Page 10 SPECIFICATIONS ELECTRONIC MODULAR SUPERFLAKER MODEL MFE 61 Important operating requirements: MIN • Air temperature 10°C (50°F) • Water temperature 5°C (40°F) • Water pressure 1 bar (14 psi) • Electr. voltage • variations from voltage • rating specified • on nameplate -10% MAX 40°C (100°F) 35°C (90°F) 5 bars (70 psi) +10% ice making capacity WATER COOLED MODELS Kg. 1400 °C 10 1100 °C DE 10 A 38°C Kg. 1150 1300 32 950 38 900 850 800 750 700 ICE PRODUCED PER 24 HRS.
Page 11 SPECIFICATIONS Dimensions: HEIGHT WIDTH DEPTH WEIGHT 850 mm. 1065 mm. 698 mm. 179 Kg. MFE 61 - MACHINE SPECIFICATIONS Model MFE 61 AS MFE 61 WS Basic electr. 230/50/3 400/50/3 + N Cond. unit Finish Comp. HP Water req. lt/24 HR Air Water S. Steel 2.5 1150* 8000* Amps Start Amps 7,1 3,4 56 28 * A 15°C water temperature Watts Electric power cons. Kwh per 24 HR 3600 80 Nr. of wires 4 x 2.5 mm 2 5 x 2.
Page 12 GENERAL INFORMATION AND INSTALLATION A. INTRODUCTION This manual provides the specifications and the step-by-step procedures for the installation, startup and operation, maintenance and cleaning for the SCOTSMAN MF 22, MF 30, MF 46, MF 56 and MFE 61 Modular Icemakers. The Electronic Flakers and Superflakers are quality designed, engineered and manufactured. Their ice making systems are thoroughly tested providing the utmost in flexibility to fit the needs of a particular user. NOTE.
Page 13 2. Lay carefully down the bin on its back to protect the finish and remove the bolts holding the shipping skid to the bin. 3. Screw-in the legs into the corresponding tapped holes in the bin bottom and tighten to seat the legs well against the bin bottom. 4. Connect the water drain line to the 1" female drain fitting located in the bottom of the bin. CAUTIONS. Avoid excessive tightening force when connecting to this fitting. Do not apply excessive heat if any sweating of the fittings is necessary.
Page 14 2. Drill two 3 mm holes in correspondance of the catch mounting holes. 3. Remove the tape and fasten the catch using the two self-tapping screws supplied. D. ELECTRICAL CONNECTIONS See data plate for current requirements to determine wire size to be used for electrical connections. All SCOTSMAN icemakers require a solid earth wire.
Page 15 7. Have the bolts holding the compressor down been checked to ensure that the compressor is snugly fitted onto the mounting pads? Manual and been instructed on the importance of periodic maintenance checks? 8. Check all refrigerant lines and conduit lines to guard against vibrations and possible failure. 11. Has the Manufacturer’s registration card been filled in properly? Check for correct model and serial number against the serial plate and mail the registration card to the factory. 9.
Page 16 OPERATING INSTRUCTIONS B. Elapsed the stand by period the unit starts operating with the activation in sequence of the following assemblies: GEAR MOTOR/S COMPRESSOR FAN MOTOR/S (if unit is an air cooled version) kept under control by the condenser temperature sensor which has its probe within the condenser fins (Fig.2). START UP After having correctly installed the ice maker and completed the plumbing and electrical connections, perform the following “Start-up” procedure. A.
Page 17 FIG. 2 WATER LEVEL RESET 88 GEAR MOTOR ROTATION 12 12 CONDENSER TEMP. T 40÷50°C 11 EVAPORATOR TEMP. 10 77 DATA PROCESSOR SENSORS 13 RELAYS 66 55 GEAR MOTOR 44 ICE LEVEL CONTROL 9 L COMPRESSOR CONTACTOR COIL 33 1 TRIAC 2 N FAN MOTOR TRANSF. ELECTRONIC CARD FIG. 3 WATER LEVEL RESET 88 ROTATION 12 CONDENSER TEMP. 11 EVAPORATOR TEMP.
Page 18 NOTE. On air cooled models, the condenser temperature sensor, which is located within the condenser fins, keeps the head (condensing) pressure between preset values.
Page 19 This will cause a gradual decrease of the water level in the float reservoir and as soon as the level gets below the two vertical metal pins, the flaker stops to operate (compressor first and 3' later the gear reducer) and the YELLOW warning LED will glow to signal the shortage of water (Fig. 4) After 3 minutes the unit resumes its total operation with the immediate start-up of the gear motor and, few seconds later, of the compressor. F.
Page 20 NOTE. The ICE LEVEL CONTROL (INFRARED SYSTEM) is independent of the temperature however, the reliability of its detection can be affected by external light radiations or by any sort of dirt and scale sediment which may deposit directly on the light source and on the receiver.
Page 21 PRINCIPLE OF OPERATION WATER CIRCUIT MF 22-30 ICE SPOUT The water enter in the machine through the water inlet fitting which incorporates a strainer located at the rear side of the cabinet - then it goes to the water reservoir flowing through a float valve. The float reservoir is positioned at the side of the freezing at such an height to be able to maintain a constant water level.
Page 22 As some ice gets scooped out from the storage bin, the light beam between the two sensors resumes (fast blinking of YELLOW LED) and six seconds later the ice machine restarts the ice making process - going always through the 3' stand by - and the YELLOW LED goes off. REFRIGERANT CIRCUIT The hot gas refrigerant discharged out from the compressor reaches the condenser where, being cooled down, condenses into liquid.
Page 23 tube connected to the liquid refrigerant line. As pressure increases, the water regulating valve opens to increase the flow of cooling water to the condenser. The RED LED starts blinking and three minutes later the flaker unit resume its normal operating mode. The condenser temperature sensor has a further safety function which consist in preventing the unit from operating in Lo-ambient conditions i.e.
Page 24 MECHANICAL SYSTEM restart the unit it is necessary to press the RE-SET push button or switch OFF and ON the power line main disconnnect switch (Fig. 7). The mechanical system of the SCOTSMAN Flaker machines consists basically of a gear motor assembly (two on model MFE 61) which drives, through a ratched coupling, a worn shaft or auger placed on its vertical axis within the freezing cylinder (two on model MFE 61). The gear motor is made of a single phase electric motor with a permanent capacitor.
Page 25 REFRIGERANT METERING DEVICE: REFRIGERANT CHARGE (R 404 A) Air cooled 660 gr 750 gr 880 gr 2400 gr capillary tube MF 30 MF 46 MF 56 MFE 61 REFRIGERANT CHARGE (R 134 A) MF 22 Air cooled Water cooled 440 gr 400 gr Water cooled 520 gr 600 gr 820 gr 1200 gr NOTE. Before charging the refrigerant system always check the type of refrigerant and quantity as specified on the individual ice machine dataplate. The refrigerant charges indicated are relatives to averages operating conditions.
Page 26 COMPONENTS DESCRIPTION A. EVAPORATOR TEMPERATURE SENSOR The evaporator sensor probe is inserted into its tube well, which is welded on the evaporator outlet line, it detects the temperature of the refrigerant on the way out from the evaporator and signals it by suppling a low voltage current flow to the P.C. Board. According to the current received, the microprocessor let the ice maker to continue its operations or not.
Page 27 infrared sensor of ice level control - YELLOW LED blinks fast) 6 seconds later the ice machine resumes its operation with the simul-taneous extinguishing the 2nd YELLOW LED. YELLOW LED Unit shut-off due to a too lo-water level into float tank F. RED LED ON all the time - Unit shut-off due to a too hi-condensing temperature - Unit shut-off due to a too lo-ambient temperature <+1°C Blinking 3 minutes start up delay time P.C. BOARD (Data processor) The P.C.
Page 28 G. JUMPERS The Flaker PC Board is equipped by three jumpers: J1 · TEST: Used in the factory to energise all the electrical components during the Testing Mode. Used to by-pass the 3' stand by time (just jump the contacts with PC Board under power). J2 - SYEN J3 - Pro. El. Ind. · 60/70°C: Used to set up the Cut Out temperature of the condenser sensor: • Jump OUT = 60°C • Jump IN = 70°C J3 - SYEN J2 - Pro. El. Ind. · 3'/60': Used to set up the start up delai time: • Jump IN = 3' • Jump OUT = 60' H.
Page 29 M. FAN MOTOR (Air cooled version) The fan motor is controlled through the TRIAC of the P.C. BOARD by the condenser temperature sensor. Normally it operates to draw cooling air through the condenser fins. In cold ambient situation, the fan motor can run at intermittance as the condenser pressure must be kept between two corresponding head pressure values. N.
Page 30 ADJUSTMENT, REMOVAL AND REPLACEMENT PROCEDURES B. NOTE. Read the instructions throughly before performing any of the following adjustment or removal and replacement procedure. A. ADJUSTEMENT OF THE EVAPORATOR WATER LEVEL The correct water level in the freezing cylinder is about 20 mm. (1") below the ice discharge opening. Low water level causes excessive strain inside the freezer assembly due to a faster freezing rate. REPLACEMENT OF THE GEAR MOTOR MAGNETIC SENSOR 1.
Page 31 Grasp the icebreaker and remove the icebreaker and auger assembly by lifting them from the evaporator. NOTE. If the auger cannot be pulled out, proceed to steps 10 and 11 of this paragraph, to gain access to the auger bottom. Then, with a rowhide mallet or placing a piece of wood on the bottom end of the auger, tap this bottom to break loose the auger and be able then to pull it out as per step 4 above. 5.
Page 32 3. Follow the steps of item E to remove the gear motor magnetic sensor. 4. Trace and disconnect the electric wires leads of the drive motor. Lift and remove the entire gear motor assembly. 5. To install the replacement gear motor assy follow the above steps in reverse. E. REPLACEMENT OF THE FREEZING CYLINDER 1. Follow the steps at item H to remove the ice spout. 2. Remove the clamp fastening the water hose to the water inlet port of the freezer assy.
Page 35 WIRING DIAGRAM MF 22-30 AIR AND WATER COOLED 230/50/1 GV B G N A M V - YELLOW GREEN WHITE GREY BLACK BLUE BROWN GREEN
Page 36 WIRING DIAGRAM MF 46 - MF 56 AIR AND WATER COOLED SINGLE PHASE GV B G N A M V - YELLOW GREEN WHITE GREY BLACK BLUE BROWN GREEN
Page 37 WIRING DIAGRAM MF 56 AIR AND WATER COOLED THREE PHASE GV B G N A M V - YELLOW GREEN WHITE GREY BLACK BLUE BROWN GREEN
Page 38 WIRING DIAGRAM MFE 61 AIR AND WATER COOLED THREE PHASE GV B G N A M V - YELLOW GREEN WHITE GREY BLACK BLUE BROWN GREEN
Page 39 SERVICE DIAGNOSIS SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION Unit will not run No LED lighted-on Blown fuse in P.C.Board Replace fuse & check for cause of blown fuse Master switch in OFF position Turn switch to ON position Inoperative P.C.Board Replace P.C.
Page 40 SERVICE DIAGNOSIS SYMPTON POSSIBLE CAUSE SUGGESTED CORRECTION Wet ice Ambient temperature too high Move unit to cooler location Under or overcharge of refrigerant Recharge with correct quantity High water level in the freezer Lower to approx. 20 mm below ice spout Faulty compressor Replace Worn out of the auger Replace Water not entering in the freezer Air look in feed line to freezer. Vent it Clogged feed line to freezer.
Page 41 MAINTENANCE AND CLEANING INSTRUCTIONS A. GENERAL The periods and the procedures for maintenance and cleaning are given as guides and are not to be construed as absolute or invariable. Cleaning, especially, will vary depending upon local water and ambient conditions and the ice volume produced; and, each icemaker must be maintened individually, in accordance with its particular location requirements. B.
Page 42 4. Remove the top panels to gain access to the water reservoir. 5. Remove the float reservoir cover and with a piece of copper wire short the two metal pins of the water level sensor. 6. Place a water pan under the freezer water inlet port, disconnect the water hose from this port and allow the water from the freezer to flow into the pan. Then refit the water hose to the freezer water inlet port. 7.
