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 maker-dispenser. The MDT6 is a combination nugget ice maker and countertop dispenser. A water station is standard. MDT6N90 The ice making section is equipped with the following features: electronic controls for bin level and low water; thermostatic expansion valve; front service for most components; and R-404A refrigerant. The ice dispensing section is a seamless plastic storage bin, with a stainless steel ice agitator at the bottom to sweep the ice into the dispensing chute. Table of Contents FOR THE INSTALLER: Specifications · · · · · · · · · · · · FOR THE INSTALLER · · · · · · · · · · · · · · · · · · · · FOR THE PLUMBER · · · · · · · · · · · · · · · · · · · · · FOR THE ELECTRICIAN · · · · · · · · · · · · · · · · · · · FOR THE INSTALLER: Final Check List · · · · · · · · · · · INITIAL START UP · · · · · · · · · · · · · · · · · · · · · · COMPONENT DESCRIPTION · · · · · · · · · · · · · · · · COMPONENT DESCRIPTION · · · · · · · · · · · · · · · · CONTROL BOX · · · · · · · · · · · · · · · · · · · · · · · ELECTRICAL SEQUENCE · · · · · · · · · · · · · · · · · · OPERATION: Water · · · · · · · · · · · · · · · · · · · · · OPERATION: Refrigeration · · · · · · · · · · · · · · · · · · OPERATION: Ice Vending · · · · · · · · · · · · · · · · · · DISPENSE AREA SANITATION · · · · · · · · · · · · · · · CLEANING and SANITIZING · · · · · · · · · · · · · · · · · SENSOR MAINTENANCE · · · · · · · · · · · · · · · · · · BEARING MAINTENANCE · · · · · · · · · · · · · · · · · · AUGER MAINTENANCE · · · · · · · · · · · · · · · · · · · SERVICE DIAGNOSIS · · · · · · · · · · · · · · · · · · · · CONTROL SYSTEM DIAGNOSTICS · · · · · · · · · · · · REMOVAL AND REPLACEMENT · · · · · · · · · · · · · · REMOVAL AND REPLACEMENT: Bearing And Breaker · · REMOVAL AND REPLACEMENT · · · · · · · · · · · · · · REMOVAL AND REPLACEMENT: Water Seal · · · · · · · · REMOVAL AND REPLACEMENT · · · · · · · · · · · · · · TO REMOVE AND REPAIR THE GEARMOTOR ASSEMBLY REFRIGERATION SERVICE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28 This manual was printed on recycled paper. Keep it for future reference. May 2001 Page 1 Note this symbol when it appears. It marks a possible hazard. MDT6N90 FOR THE INSTALLER: Specifications This ice maker-dispenser is designed to be mounted on a machine stand, or a countertop. Before beginning the installation, check that all the materials and kits required are available at the installation location. Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance. They meet or exceed the standards of U.L., N.S.F., and C.U. L. 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 parts 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 designs are subject to change without notice. BACK VIEW 3/8" FPT Cond. Water Inlet (W/C) 1/2" FPT Cond. Drain (W/C) 3/4 FPT Drain Water Limitations: An ice machine is a food manufacturing plant; it takes in a raw material, water, and turns it into a food product, ice. The purity of the water is very important in obtaining pure ice and in maximizing product life. General recommendations Electrical Junction are: Box 1. Filter the water used to produce ice. 3/8" Flare Water Inlet 2. Check with a water treatment specialist for a water test, and any 6.63" recommendations regarding 12.5" filters and treatment. 4.63" 3.84" 2.63" 7.93" .75" 3/4" FPT Drain 5.59" 17.59" Dimensions (w/o stand) H" x W" x D" MDT6N90AS-1 A or B 45.74 x 35.18 x 29.26 MDT6N90WS-1 A same MDT6N90WS-1 B same Model Number Model Series Condenser Refrigerant Basic Minimum Type Charge Electrical Circuit (R-404A) Ampacity* Air 32 115/60/1 18.1 Water 22 same 16.5 Water 19 same 16.5 Max. Fuse Size 25 20 20 *Minimum circuit ampacity is used to determine wire size and type per National Electric Code. Options: Machine stand DMS31. Portion control kit KPC-MDT. June 2002 Page 2 FOR THE INSTALLER Location This ice system is designed to be installed indoors, in a controlled environment. Minimum Maximum Air Temp 500F. 1000F. Water Temp 400F. 1000F. Water Pressure 20 psi 80 psi Voltage 104 126 Operating the machine outside of the above limitations, or outdoors, is potentially damaging to the machine; also it is misuse of the machine which may void the warranty. Service Limitations Do not install in a location where the top of the machine is within 6" of a fixed ceiling. Air cooled models require a minimum of 6 inches to the left and right of the machine for air circulation. It is important that the machine be installed in a location where it has enough space above and behind it for service. After uncrating and inspection, the unit is ready for installation. Machine Stand Installation Tip the stand on its back and install the legs, return the stand to the upright position. Adjust leg levelers so that the stand does not "rock". Counter Top or Machine Stand Installation The base of the icemaker-dispenser must be sealed to the object it rests upon. Food grade silastic sealant such as Scotsman part number 19-0529-01 is recommended. Place a bead of the sealant on the machine stand or counter top to match the outside edge of the cabinet base and sink. The icemaker-dispenser is heavy: use of a mechanical hoist is recommended to lift it to the height required to install it. The DMS machine stand has holes in the top that match up with threaded holes in the base of the machine. Secure the machine stand to the base with 4 5/16" bolts. MDT6N90 In both counter top and machine stand installations, wipe off and neatly smooth any excess sealant. Level the machine stand and cabinet. Unpack and install the sink brackets. Fit the sink assembly onto the two sink brackets, and press onto the bead of sealant. Wipe off and neatly smooth any excess sealant from under the sink edge. Connect the sink drain to the dispenser drain system. Airflow SEAL ICEMAKERDISPENSER TO THE COUNTER TOP OR MACHINE STAND May 2001 Page 3 MDT6N90 FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet Air Cooled Models: Connect a clean, potable and cold water supply to the 3 8" male flare at the back of the cabinet. Install a hand valve near the machine to control the water supply. Use 3 8" O.D. copper tubing. 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: Connect a separate 3 8" INLET WATER O.D. copper line, with a separate hand valve to control it, to the 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 120 psig. Drains Air Cooled Models: Connect a drain tube to the one ¾" FPT drain fitting (plastic) at the back of the cabinet, the drain line is of the gravity type, and ¼ 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 ¾" rigid tubing. VENTED DRAIN OPTIONAL WATER FILTER WATER COOLED CONDENSER WATER INLET SHUT OFF VALVE FLOOR DRAIN CONDENSER DRAIN Water Cooled Models: In addition to the above mentioned drain, a separate condenser drain line must be installed. Connect it to the ½ " condenser drain connection at the back of the cabinet. May 2001 Page 4 FOR THE ELECTRICIAN CONFORM TO ALL APPLICABLE CODES Connect the electrical power supply for the unit to the wires in 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. MDT6N90 POWER SUPPLY ELECTRICAL CONNECTION May 2001 Page 5 MDT6N90 FOR THE INSTALLER: Final Check List 1. Is the icemaker-dispenser installed indoors, in a location where the air and water temperatures are controlled, and where they do not go beyond design limitations? 2. is there an electrical service disconnect within sight of the installed machine? Is the machine on a separate circuit? Has the voltage been checked and compared to nameplate requirements? 3. Have all of the plumbing connections been made and checked for leaks? 4. Has the machine been leveled? 5. Is there a minimum of 6 inches of clearance at the left and right sides of an air cooled machine? 6. Is there a minimum of 6 inches of clearance at the top and back of the machine for service and utility connections? 7. Is there a water shut off valve installed near the machine? 8. Have all of the shipping blocks been removed? ELECTRICAL? LEVELED? WATER INLET? DRAINS? May 2001 Page 6 INITIAL START UP Pre Start Inspection 1. Remove the two front panels. 2. Check that all shipping blocks have been removed. 3. Remove any and all packing tape (check inside the storage bin). 4. 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 on air cooled models turns freely. 5. Check that the machine is installed correctly according to the final check list. MDT6N90 Start Up 1. Go through the pre start inspection. 2. Open the water 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 mode switch to ON. The auger drive motor and compressor start, beginning the ice making process. 4. On air cooled models, warm air will begin to flow from the condenser. Water cooled models will begin to discharge warm water down the drain. 5. The unit should soon be making ice. If desired, the low side pressure may be checked: it should be 38 PSIG + or - 4 PSIG. The air cooled discharge pressure will depend upon air and water temperatures, but should be between 200 PSIG and 300 PSIG. Water cooled discharge pressure should be about 245 PSIG. If needed, adjust the water regulating valve. The above numbers are for new, clean machines. Field ...