MDT2 INTRODUCTION This manual provides the specifications and the step-by-step procedures for the installation, start-up, operation, maintenance and cleaning for the SCOTSMAN MDT2 counter top cubelet ice dispenser. NOTE: To retain the safety and performance built into this ice machine, it is important that installation and maintenance be conducted in the manner outlined in this manual. Table of Contents SPECIFICATIONS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 2 CABINET DIAGRAMS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 3 · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 4 GENERAL INFORMATION AND INSTALLATION ELECTRICAL CONNECTIONS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 5 WATER SUPPLY AND DRAIN CONNECTIONS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 6 FINAL CHECK LIST · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 7 OPERATING INSTRUCTIONS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 8 INITIAL START UP CONTINUED · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 9 SETTING THE DISPENSING SELECTOR · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 11 PRINCIPLE OF OPERATION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 12 REFRIGERANT CIRCUIT · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 13 MECHANICAL SYSTEM · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 14 COMPONENT DESCRIPTION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 15 COMPONENT DESCRIPTION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 16 COMPONENT DESCRIPTION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 17 COMPONENT DESCRIPTION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 18 SERVICE DIAGNOSIS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 19 SERVICE DIAGNOSIS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 20 MAINTENANCE AND CLEANING INSTRUCTION · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 21 CLEANING INSTRUCTIONS OF WATER SYSTEM · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 22 REMOVAL AND REPLACEMENT · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 23 TOP BEARING REPLACEMENT · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 24 BEARING REPLACEMENT - CONTINUED · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 25 WATER SEAL · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 26 May 2002 Page 1 MDT2 SPECIFICATIONS MDT2C12: Ice Maker Dispenser TouchFree 200 lb ice making capacity Cublet 12 lb storage Important operating requirements: MIN - Air temperature - Water temperature - Water pressure - Electrical voltage variations from voltage rating specified on nameplate 50°F 40°F 20 psi -10% MAX 100°F 95°F 70 psi +10% To keep your SCOTSMAN CUBELET DISPENSER at peak performance levels, periodic maintenance checks must be carried out as indicated in this manual. MACHINE SPECIFICATIONS Model MDT2C12-1A Basic electrical 115/60/1 Cond. unit Air Amps 6 Cabinet Size 34 13/32" high x 15 9/32" wide x 26 7/64" deep Watts 550 Amps fuse 15 Finish S. Steel Comp. HP 3/8 Ice bin cap 12 lb. Unit is equipped with leveling legs. The unit has a power cord. May 2002 Page 2 MDT2 CABINET DIAGRAMS May 2002 Page 3 MDT2 GENERAL INFORMATION AND INSTALLATION UNPACKING AND INSPECTION 1. Call your authorized SCOTSMAN Distributor or Dealer for proper installation. 2. Visually inspect the exterior of the packing and skid. Any severe damage noted should be reported to the delivering carrier and a concealed damage claim form filled in subject to inspection of the contents with the carrier's representative present. 3. a) Cut and remove the plastic strip securing the carton box to the skid. b) Cut open the top of the carton and remove the polystyrene protection sheet. c) Pull out the polystyrene posts from the corners and then remove the carton. 4. Remove the top and sides panels of the unit and inspect for any concealed damage. Notify carrier of your claim for the concealed damage as stated in step 2 above. 5. Remove all internal support packing and masking tape. 6. Check that refrigerant lines do not rub against or touch other lines or surfaces, and that the fan blades move freely. 7. Check that the compressor fits snugly onto all its mounting pads. 8. Use clean damp cloth to wipe the surfaces outside of the cabinet. 9. See data plate on the rear side of the unit and check that local main voltage corresponds with the voltage specified on it. LOCATION AND LEVELING WARNING: This Ice Dispenser is designed for indoor installation only. If the machine is operated for extended periods at temperatures exceeding the following limitations it will constitute misuse under the terms of the SCOTSMAN Manufacturer's Limited Warranty resulting in LOSS of warranty coverage. Position the unit in the selected permanent location. Criteria for selection of location include: Min Air Temperature 50°F Water Temperature 40°F Water pressure 20 psi Voltage -10% (Compared to the nameplate) Max 100°F 95°F 70 psi +10% Service access: adequate space must be left for all service connections through the rear of the ice machine. This machine is air-cooled and sucks air through the left side panel and blows air out the rear side of the top panel. Do not install the machine where the left and upper rear side airflows might be blocked. A minimum clearance of 6 inches is required at the left and upper rear side for air circulation. It is important that the machine be installed in a location where it has enough space around it to be accessible for service. Avoid hot, dirty and crowded locations. NOTE: Do NOT place anything on top of the machine. Leave the upper louvers open for proper air exhaust. The base of the MDT2 must be sealed to the counter top. 1. Place the unit in its final position. 2. Place a bead of sealant on the counter top to match the outside edge of the cabinet base and sink. Food grade silastic sealant such as Scotsman part number 19-0529-01 is recommended. CAUTION: Incorrect voltage supplied to the ice machine will void your parts replacement program. 10. Remove the manufacturer's registration card from the inside of the Users Manual and fill-in all parts including Model and Serial Number taken from the data plate. Forward the completed self-addressed registration card to SCOTSMAN factory. May 2002 Page 4 MDT2 ELECTRICAL CONNECTIONS See data plate for current requirements to determine wire size to be used for electrical connections. All SCOTSMAN ice machines require a solid earth wire. This SCOTSMAN ice machine is supplied from the factory completely pre-wired and only needs to be plugged into a nearby 115 volt outlet. Make sure that the ice machine is connected to its own circuit and individually fused (see data plate for fuse size). The maximum allowable voltage variation should not exceed -10% and +10% of the data plate rating. Low voltage can cause faulty functioning and may be responsible for serious damage to the overload switch and motor windings. NOTE: All external wiring should conform to national, state and local standards and regulations. Check voltage on the line and the ice machine's data plate before connecting the unit. May 2002 Page 5 MDT2 WATER SUPPLY AND DRAIN CONNECTIONS GENERAL When choosing the water supply for the ice flaker, consideration should be given to: a) Length of run b) Water clarity and purity c) Adequate water supply pressure Water is the most important single ingredient in producing ice - these three items are very important. Low water pressure, below 20 psi may cause malfunction of the ice machine unit. Water containing excessive minerals will tend to produce scale build-up on the interior parts of the water system while water that's too soft (water contains too few mineral salts), will produce a very hard flaked ice. PLUMBING CONNECTIONS MUST CONFORM TO ALL APPLICABLE CODES CONNECT TO POTABLE WATER ONLY The model MDT2 is capable of having water connections through the bottom base or through the rear bottom side of the machine. In this second case it is necessary to remove the small panel at the bottom rear. WATER SUPPLY Connect to the 3/4" male water inlet fitting, using the supplied fitting, to the cold water supply line. A shut-off valve should be installed in an accessible position between the water supply line and the unit. If the water contains a high level of impurities, consider installing a water filter or conditioner. Note: Although soft, easily kinked vinyl tubing is not recommended for a drain, a short length of ¾" ID vinyl tubing is required to connect a rigid drain tube to the 20 mm (25/32") fitting on the back of the MDT2. Install a vertical open vent on the drain line high point at the drain connection to ensure good draining. The ideal drain receptacle is a trapped and vented floor drain. NOTE: The water supply and the water drain must be installed to conform with the local code. In some case a licensed plumber and/or a plumbing permit is required. WATER DRAIN The recommended drain tube is a copper, rigid plastic or reinforced flexible tubing (supplied) with .75" (19mm) I.D. which runs to an open trapped and vented drain. When the drain is a long run, allow1/4" drop per foot. May 2002 Page 6 MDT2 FINAL CHECK LIST 1. Is the unit in a room where the ambient temperatures are within a minimum of 50°F even in winter months? 2. Is there at least a 6" clearance around the unit for proper air circulation? 3. Is the unit level? 4. Have all the electrical and plumbing connections been made, and is the water supply shut-off valve open? 5. Has the voltage been tested and checked against the data plate rating? 6. Has the water supply pressure been checked to ensure a flowing water pressure of at least 20 psi. 7. Check all refrigerant lines and conduit lines to guard against vibrations and possible failure. 8. Has the unit been sealed to the counter top? 9. Has the owner/user been given the Users Manual and been instructed on the importance of periodic maintenance checks? 10. Has the Manufacturer's registration card been filled in properly? Check the model and serial number against the serial plate and mail the registration card to Scotsman. 11. Has the owner been given the name and the phone number of the authorized SCOTSMAN Service Agency serving them? May 2002 Page 7 MDT2 OPERATING INSTRUCTIONS INITIAL START UP After having correctly installed the ice machine and completed the plumbing and electrical connections, perform the following "Start-up" procedure. Remove the control board inspection panel and cover to view the lights on the control board. A. Open the water supply line shutoff valve and turn the main switch on the power supply line to the ON position. The GREEN LED will glow to signal that unit is under power. NOTE: Every time the unit is turned on after being shut off for a period of time (electrically disconnected) the 2nd RED LED will blink for 3 minutes (Fig.1). Fig 1 Reset button B. After 3 minutes have elapsed ­ the stand by period ­ the unit starts operating by activating systems in following sequence: 1. GEAR MOTOR 2. COMPRESSOR 3. FAN MOTOR ­ which is controlled by the condenser temperature sensor. The probe is within the condenser fins. 4. 2nd RED LED switches off (Fig. 2). C. Two or three minutes after compressor start up; cubelet ice should begin dropping off the ice spout into the storage bin. BLINKING ­ 3 MIN. STAND-BY PERIOD Bin empty Hi cond temp when Steady 3 minute wait when Blinking Auger Mo ...