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 . . . . . . . . . . . . . . . . . . . . . . FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FOR THE ELECTRICIAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . START UP ........................................ ............................... ........................ ................................ COMPONENT DESCRIPTION ELECTRICAL SEQUENCE: OPERATION: Water COMPONENT DESCRIPTION: Control Box .................................... OPERATION: Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OPERATION: Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . SANITIZING AND CLEANING MAINTENANCE: Air Cooled SERVICE DIAGNOSIS: ............................... ............................. ......................... ............ ................................ MAINTENANCE AND CLEANING MAINTENANCE AND CLEANING: Auger .................................. REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls REMOVAL AND REPLACEMENT: Auger REMOVAL AND REPLACEMENT: Bearing And Breaker . . . . . . . . . . . . . . . . . . ......................... REMOVAL AND REPLACEMENT: Water Seal . . . . . . . . . . . . . . . . . . . . . . . REMOVAL AND REPLACEMENT: Evaporator . . . . . . . . . . . . . . . . . . . . . . . REMOVAL AND REPLACEMENT: Gearmotor . . . . . . . . . . . . . . . . . . . . . . . REMOVAL AND REPLACEMENT: Fans LIQUID CHARGING .......................... REFRIGERATION SYSTEM SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . .................................... ................................ CIRCUIT BOARD TESTING: Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper. This manual was printed on recycled paper. Keep it for future reference. Note the warning symbol where it appears. It marks a possible hazard. January 1995 Page 1 NME950 & FME1200 FOR THE INSTALLER BACK VIEW: AIR COOLED Note: Allow 6" behind and 6" above either unit for air circulation, utility connections, and service. ELECTRICAL INLET BACK VIEW: WATER COOLED ELECTRICAL INLET WATER INLET 9.5" 5.25" 3" 5.25" 3" 7.3" 9.43" WATER INLET 3/8" FLARE DRAIN 3/4" FPT Condenser Inlet 3/8" FPT 2.1" 5.7" 2.9" Condenser Drain 1/2" FPT 3.4" DRAIN 3/4" FPT 4.9" 7.46" This machine is designed to fit the following Scotsman storage bins: B90 and extensions (with bin top KBT18) BH800 using bin top KBT15 (one unit). BH800 (two units, no bin top required). BH900 with KBT24 (one unit) BH900 with KBT25 (two units side by side) When installing a new system, check to be sure that everything is on site before beginning: Correct Bin Correct Ice Machine Correct Bin Top (if required) All kits, legs, and information required for the specific job. SPECIFICATIONS : ICE MAKER Model Number Dimensions (w/o bin) WxDxH 21" x 24" x 27" same same same same same same same Basic Electrical 208-230/60/3 same 208-230/60/1 same 208-230/60/3 same 208-230/60/1 same Installation Limitations: This ice system is designed to be installed indoors, in a controlled environment: Min Max Air Temperature 500F 1000F Water Temperature 400F 1000F Water Pressure 20 PSI 80 PSI Voltage -5% +10% (Compared to the nameplate) Operating the machine outside of the limitations is misuse and can void the warranty. The normal finish for the ice machine is enamel-sandalwood. A stainless steel panel kit, SPKFM21 may be field installed to convert the unit to a stainless steel finish. Ice Type Condenser Type Air Water Air Water Air Water Air Water FME1200AE-3A FME1200WE-3A FME1200AE-32A FME1200WE-32A NME950AE-3A NME950WE-3A NME950AE-32A NME950WE-32A FLAKE same same same Nugget same same same Refrigerant Charge* Air Cooled 30 oz R-404A Water 24 oz Cooled R-404A * Always go by the nameplate charge. Note: 50 Hz (-6) models have also been produced. January 1995 Page 2 NME950 & FME1200 SAMPLE BIN AND MACHINE COMBINATIONS Air Flow on All Air Cooled Models is In the Front and Out the Back FME1200 ON BH550* NME950 ON BH800* The Nameplate is located on the back of the machine. FME1200 ON BH900* * Bin Top Kit Required January 1995 Page 3 NME950 & FME1200 FOR THE INSTALLER Typical Storage Bin with Extension and Bin Top Location: After uncrating and inspection, the unit is ready for installation. It is important that the machine be installed in a location where it has enough space around it to be accessible for service, and minimum of 6" be allowed at the back for air circulation on air cooled models. Try to avoid hot, dirty and crowded locations. Be sure that the location for the machine is within the environmental limitations. Storage Bin: Tip the storage bin on its back, using parts of the carton to protect the exterior finish. Install the legs into the threaded holes in the bottom of the bin. Turn the leg levelers all the way in preparation for leveling later. Return the bin to the upright position, remove paper covering the bin gasket. Note: Do not push bin into position, but lift it there. Pushing a bin, especially one with ice in it, can cause damage to the legs and the leg mounts. Install the appropriate bin top on the bin, according to the instructions for the bin top. Ice Maker: The machine is heavy, so the use of a mechanical lift is recommended for lifting the machine high enough to install on top of the bin. After the unit is placed on the bin, line it up so it is even with the back side. Secure the machine to the bin with the hardware provided with the machine. Remove the front panel and remove any shipping blocks. Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance. They meet or exceed the standards of UL, NSF and CUL. Scotsman assumes no liability or responsibility of any kind for products manufactured by Scotsman that have been altered in any way, including the use of any part and/or other components not specifically approved by Scotsman. Scotsman reserves the right to make design changes and/or improvements at any time. Specifications and design are subject to change without notice. January 1995 Page 4 NME950 & FME1200 FOR THE INSTALLER: Location TWO UNITS ON ONE BIN DO NOT STACK ANYTHING IN FRONT OF THE MACHINE(S) ALLOW ROOM FOR AIR CIRCULATION AND SERVICE ACCESS January 1995 Page 5 NME950 & FME1200 FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet Air Cooled Models: The recommended water supply is clean, cold water. Use 3/8" O.D. copper tubing, connect to the 3/8" male flare at the back of the cabinet. Install a hand valve near the machine to control the water supply. Water Treatment: In most areas, a water filter of some type will be useful. In areas where the water is highly concentrated with minerals the water should be tested by a water treatment specialist, and the recommendations of the specialist regarding filtration and/or treatment should be followed. Water Cooled Models: A separate 3/8" O.D. copper line is recommended, with a separate hand valve to control it. It is connected to a 3/8" FPT condenser inlet at the back of the cabinet. The water pressure to all lines must always be above 20 psig, and below 80 psig. Drains Air Cooled Models: There is one 3/4" FPT drain at the back of the cabinet, the drain line is of the gravity type, and 1/4 inch per foot fall is an acceptable pitch for the drain tubing. There should be a vent at the highest point of the drain line, and the ideal drain receptacle would be a trapped and vented floor drain. Use only 3/4" rigid tubing. Water Cooled Models : In addition to the above mentioned drain, a separate condenser drain must be installed. Connect it to the 1/2" condenser drain connection at the back of the cabinet. Storage Bin : A separate gravity type drain needs to be run, similar to the air cooled drain. Insulation of this drain line is recommended. AIR COOLED MODELS WATER COOLED CONDENSER INLET HAND VALVE FIELD SUPPLIED FILTER VENTED DRAIN HAND VALVE WATER FILTER CONDENSER DRAIN VENTED DRAIN WATER INLET January 1995 Page 6 NME950 & FME1200 FOR THE ELECTRICIAN CONFORM TO ALL APPLICABLE CODES The electrical power to the unit is supplied through the junction box at the rear of the machine. Check the nameplate (located on the back panel) for the voltage requirements, and for the minimum circuit ampacity. The machine requires a solid chassis to earth ground wire. The ice maker should be connected to its own electrical circuit so it would be individually fused. Voltage variation must remain within design limitations, even under starting conditions. All external wiring must conform to national, state, and local electrical codes. The use of a licensed electrician is required to perform the electrical installation. WATER COOLED POWER SUPPLY AIR COOLED January 1995 Page 7 NME950 & FME1200 FOR THE INSTALLER Final Check List 1. Is the ice system installed indoors in a location where the air and water temperatures are controlled, and where they do not exceed the design limitations? 2. Is there an electrical service disconnect within sight of the installed machine? Has the voltage been checked, and compared to nameplate requirements? 3. Have all the plumbing connections been made and checked for leaks? 4. Has the machine and bin been leveled? 5. Is there a minimum of 6" clearance at the back of the machine for proper service access and air circulation? 6. Is the water pressure a minimum of 20 psig? 7. Has the machine been secured to the bin? 8. Is there clearance over the top of the machine for service access? 9. Is there a water shut off valve installed near the machine? 10. Have all of the shipping blocks been removed? January 1995 Page 8 NME950 & FME1200 START UP Pre-Start Inspection 1. Remove the front and side service panels. 2. Check that the styrofoam shipping blocks have been removed. 3. Inspect the interior of the machine for loose screws or wires. Check that no refrigerant lines are rubbing each other. Check that the fan blade turns freely (air cooled). 4. Check that the unit is installed correctly according to the final check list (page 8). Start Up 1. Go through the prestart inspection. 2. Open the hand valve, observe that water enters the water reservoir, fills the tube from the reservoir to the evaporator, and then shuts off. Check for leaks. 3. Switch the master switch on. The electrical start up sequence is now on automatic. A. There should be a short (15 second) delay before the gear motor starts. B. After the gear motor starts, the compressor will start. 4. On air cooled models, the condenser will begin to discharge warm air, on water cooled models, the water regulating valve will open, and warm water will be discharged into the drain. 5. The unit should soon be making ice, if desired, the low side pressure may be checked: it should be 32 psig + or - 2 psig. The suction line temperature at the compressor is normally very cold, nearly to the point of frost up to the compressor body, but not on it. The air cooled discharge pressure will depend upon air and water temperatures, but should be between 200 psig and 280 psig. The water cooled discharge pressure should be constant at about 245 psig. The above numbers are for new, clean machines, you can expect to see some values higher, and some lower between different units. 6. THERE ARE NO ADJUSTMENTS TO MAKE , so replace the panels. 7. Clean and/or sanitize the storage bin interior, wipe off the exterior with a clean, damp cloth. 8. Give the owner/user the service manual, instruct him/her in the operation of the unit, and make sure they know who to call for service. 9. Fill out the manufacturers registration card, and mail it to the Scotsman Factory. 10. Fill out the warranty registration form, and mail it to Scotsman. January 1995 Page 9 NME950 & FME1200 COMPONENT DESCRIPTION Control Box: Contains the electrical controls that operate the machine. High Pressure Cut Out Switch : A manual reset switch sensing the high side refrigeration pressure. It is set to shut the machi ...