User manual SCOTSMAN NME950

[. . . ] NME950 & FME1200 INTRODUCTION To the owner or user: The service manual you are reading is intended to provide you, and the maintenance or service technician, with the information needed to install, start up, clean, maintain, and service this ice system. This machine is a modular ice system that fits a variety of Scotsman ice storage bins. It features: front service for the freezer, gear motor, control box, water reservoir, and bin control; an electronic circuit for monitoring ice and water level; a thermostatic expansion valve; and R-404A as the refrigerant. TABLE OF CONTENTS FOR THE INSTALLER FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2 Page 3 Page 4 Page 6 Page 7 Page 9 Page 10 Page 11 Page 13 Page 14 Page 15 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 Page 29 Page 30 Page 31 SAMPLE BIN AND MACHINE COMBINATIONS . [. . . ] After draining the reservoir, as in step 6, wash and rinse the water reservoir. January 1996 Page 16 NME950 & FME1200 MAINTENANCE AND CLEANING A. Check the bearing by: · removing the ice chute cover Electrical shock hazard. Disconnect power before beginning to service components. · unscrewing the ice sweep · removing the water shed · unscrewing the breaker cover. · unscrewing the auger stud Inspect the assembly, looking for wear. ICE LEVEL SENSORS: SLIDE TO REMOVE 1. The bin control uses devices that sense light, therefore they must be kept clean enough so that they can ``see''. At least twice a year, remove the bin control sensors from the base of the ice chute, and wipe the inside clean, as illustrated. The ice machine senses water level by a probe located in the water reservoir. At least twice a year, the probe should be removed from the reservoir, and the tip wiped clean of mineral build-up. PULL UP TO REMOVE PROBE CLEAN THE LIGHT SENSORS RESERVOIR See Removal and Replacement to replace bearing or seals. Check and tighten all bolts and screws. CLEAN THE WATER LEVEL PROBE ICE SWEEP /////////////////////////////////////////// CAUTION: THE TIP IS MADE OF GLASS ////////////////////////////////////////// 3. The bearing in the breaker should also be checked at least two times per year . BREAKER COVER January 1995 Page 17 NME950 & FME1200 MAINTENANCE: Air Cooled Electrical shock hazard. Clean the air cooled condenser. The air flow on this model is from front to back, so the inside of the machine will have to be available to clean the air cooled condenser. Clean the condenser: the condenser may appear to be clean on the surface, but it can still be clogged internally. Check with a flash light from the front to see if light can be seen though the condenser fins. CLEAN CONDENSER FINS. January 1995 Page 18 NME950 & FME1200 MAINTENANCE AND CLEANING: Auger In some areas, the water supply to the ice maker will contain a high concentration of minerals, and that will result in an evaporator and auger becoming coated with these minerals, requiring a more frequent removal than twice per year. If in doubt about the condition of the evaporator and auger, the auger can be removed so the parts can The auger has sharp edges, handle with care. Note: Water filters can filter out suspended solids, but not dissolved solids. For more information on removal of these parts, see REMOVAL AND REPLACEMENT. ALLEN SCREWS BREAKER & BEARING & AUGER ASSEMBLY Electrical shock hazard. Disconnect power before beginning to service components. Turn off the water supply. Push back bail clamp holding ice chute cover to ice chute, and remove cover. Loosen band clamp under ice chute, and remove ice chute from evaporator. Drain the evaporator by lowering and uncapping the evaporator drain hose. After the auger has been removed, allow the auger to dry: if the auger is not bright and shiny, it must be cleaned. [. . . ] The remove the core cap. · Close the valve and replace the caps when the job is finished. The valve must be closed and the caps must be on or the valve will leak. ALLEN WRENCH Torque to 6-8 ft. (DEG F) (PSIG) DEG F) (PSIG) -20 17 70 146 -18 18 72 150 -16 20 74 155 -14 21 76 161 -12 23 78 166 -10 24 80 171 -8 26 82 177 -6 28 84 182 -4 29 86 188 -2 31 88 194 0 33 90 200 2 35 92 206 4 37 94 212 6 39 96 219 8 41 98 225 10 43 100 232 12 46 102 239 14 48 104 246 16 50 106 253 18 53 108 260 20 55 110 268 22 58 112 275 24 60 114 283 26 63 116 291 28 66 118 299 30 69 120 307 32 72 122 316 34 75 124 324 36 78 126 333 38 81 128 342 40 85 130 351 42 88 132 360 44 91 134 370 46 95 136 379 48 99 138 389 50 102 140 399 52 106 142 409 54 110 144 420 56 114 146 430 58 118 148 441 60 123 150 452 62 127 152 464 64 132 154 475 66 136 156 487 68 141 158 499 January 1995 Page 29 NME950 & FME1200 LIQUID CHARGING Instructions for R-404A In preparation for charging, the low side hose should have a sight glass, and/or a restrictor device (such as a "Charge Faster") installed in it for metering liquid into the low side of the system. After a thorough evacuation to at least 200 microns, shut off the manifold valves and switch off the vacuum pump. Shut the low side access valve at the ice Low Side Access Valve machine. [. . . ]