NME650 & FME800 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 is a modular ice system that fits a variety of Scotsman ice storage bins. It features: front service for the freezer, gearmotor, control box, water reservoir, and bin control; an electronic circuit for monitoring ice and water level; a thermostatic expansion valve; and HP62 as the refrigerant. Table of Contents FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SAMPLE BIN AND MACHINE COMBINATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 FOR THE ELECTRICIAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 START UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 ELECTRICAL SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 OPERATION: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 MAINTENANCE AND CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 SERVICE DIAGNOSIS: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 REMOVAL AND REPLACEMENT: Bin Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 REMOVAL AND REPLACEMENT: Bearing And Breaker . . . . . . . . . . . . . . . . . . . . . . . . . 25 REMOVAL AND REPLACEMENT: Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 REMOVAL AND REPLACEMENT: Water Seal REMOVAL AND REPLACEMENT: Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 REMOVAL AND REPLACEMENT: Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 REFRIGERATION SERVICE: HP62 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 CIRCUIT BOARD TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper. This manual was printed on recycled paper. Keep this manual for future reference. Note this symbol when it appears. It is an alert for important safety information on a potential hazard. February 1997 Page 1 NME650 & FME800 FOR THE INSTALLER These machines fit the following Scotsman products, check sales literature for other possible combinations: B90 and extensions (with bin top KBT18) HTB555 or BH550 using bin top KBT14 or KBT20 BH800 using bin top KBT15 (one unit). BH800 (two units, no bin top required). BH900 using bin top KBT24. When installing a new system, check to be sure that you have everything you need before beginning: Correct Bin Correct Ice Machine Correct Bin Top (if required) All kits, legs, and information required for the specific job. 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 (for 115v model) 104 126 (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. A stainless steel panel kit, SPKFM21 may be field installed to convert the unit to a stainless steel finish. SPECIFICATIONS: ICE MAKER Model Number Dimensions FME800AE-1A FME800WE-1A FME800AE-6B FME800WE-6B NME650AE-1A NME650WE-1A NME650AE-6B NME650WE-6B 27" x 21" x 24" same same same same same same same Basic Ice Type Condenser Minimum Max. Refrigerant Electrical Type Circuit Ampacity Fuse Size Charge: 115/60/1 same 230/50/1 same 115/60/1 same 230/50/1 same Flake same same same Nugget same same same Air Water Air Water Air Water Air Water 19.5 18.3 30 30 24 ounces 20 ounces 24 ounces 20 ounces 24 ounces 20 ounces 24 ounces 20 ounces 19.5 18.3 30 30 Note: Minimum Circuit Ampacity is used to determine wire size and type per national electric code. February 1997 Page 2 NME650 & FME800 SAMPLE BIN AND MACHINE COMBINATIONS FME800 ON BH550* NME650 ON BH800* The Nameplate is located on the back of the machine. FME800 ON BH900* *Bin Top Kit Required February 1997 Page 3 NME650 & FME800 FOR THE INSTALLER 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 a 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. Water Limitations: An ice machine is a food manufacturing plant: it takes a raw material, water, and transforms it into a food product, ice. The purity of the water is very important in obtaining pure ice and in maximizing product life. This section is not intended as a complete resource for water related questions, but it does offer these general recommendations: 1. Check with a water treatment specialist for a water test, and recommendations regarding filters and treatment. 2. In most cases, the water used to make ice should be filtered or treated, depending upon the water. There is no one type of water filter that is effective in all situations. That is why a water test is important. Note: 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. 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. Note: When placing 2 of these machines on a BH800 without the bin top, removal of the 2 service panels facing each other will make future service easier: 1. Remove the 2 top panel screws that will face each other. 2. Remove the 2 service panels that will face each other. 3. Add a strip of gasket, such as Scotsman part number 19-0503-04, to the 2 base edges that will face each other and around service panel space on the 2 panels that will face each other. When the 2 machines are placed on the bin, the gaskets will seal the bin top area and the space between the machines. February 1997 Page 4 NME650 & FME800 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 February 1997 Page 5 NME650 & FME800 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. WATER COOLED CONDENSER INLET HAND VALVE HAND VALVE AIR COOLED MODELS VENTED DRAIN WATER FILTER CONDENSER DRAIN VENTED DRAIN FIELD SUPPLIED FILTER WATER INLET February 1997 Page 6 NME650 & FME800 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 February 1997 Page 7 NME650 & FME800 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? February 1997 Page 8 NME650 & FME800 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 gearmotor starts. B. After the gearmotor 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 can be checked: it should be 34 psig + or - 4 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 220 psig and 300 psig. The water cooled ...