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 machine is a combination nugget ice maker and countertop dispenser, with the option of wall mounting. MDT5N25 & MDT5N40 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 rotating vane to sweep the ice into the dispensing chute. FOR THE INSTALLER: Specifications· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 2 FOR THE INSTALLER: Environmental Limitations · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 3 FOR THE INSTALLER· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 4 FOR THE INSTALLER: Wall Mount Kit · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 5 FOR THE PLUMBER · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 6 FOR THE ELECTRICIAN · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 7 FOR THE INSTALLER: Final Check List · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 8 INITIAL START UP · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 9 COMPONENT DESCRIPTION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 10 COMPONENT DESCRIPTION · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 11 COMPONENT DESCRIPTION: Control Box · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 12 ELECTRICAL SEQUENCE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 13 OPERATION: Water · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 14 OPERATION: Refrigeration · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 15 OPERATION: Ice Vending · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 16 DISPENSE AREA SANITATION· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 17 CLEANING and SANITIZING · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 18 MAINTENANCE AND CLEANING· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 19 SERVICE DIAGNOSIS · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 21 SERVICE DIAGNOSIS: Circuit Board · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 23 REMOVAL AND REPLACEMENT · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 24 REMOVAL AND REPLACEMENT: Bearing And Breaker · · · · · · · · · · · · · · · · · · · · · · · · · · Page 25 REMOVAL AND REPLACEMENT: Water Seal · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 27 TO REMOVE AND REPAIR THE GEARMOTOR ASSEMBLY · · · · · · · · · · · · · · · · · · · · · · · Page 29 REFRIGERATION SERVICE: R-404A (HP62) · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 30 REFRIGERATION SERVICE · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 31 CIRCUIT BOARD SERVICE· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 32 LIQUID CHARGING · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Page 32 Note this symbol when it appears. It marks a possible hazard. May 2001 Page 1 Table of Contents Parts Lists and Wiring Diagrams are printed on yellow paper in the center of this manual. This manual was printed on recycled paper. Keep it for future reference. MDT5N25 & MDT5N40 FOR THE INSTALLER: Specifications This ice maker-dispenser is designed to be mounted on a machine stand, or a countertop, or using wall mounting kit KWB3, hung from a wall. The sink may be retained, or removed and the optional longer splash panel (KSP5) installed in place of the original. Instructions for each kit are included in this service manual. Before beginning the installation, check that all the materials and kits required are available at the installation location. NAMEPLATE on back panel ELECTRICAL JUNCTION BOX 3.54" 20.5" 4.5" 2.56" 3/8" FPT condenser Water Inlet (Water Cooled) 1.88"dia 3/8" Flare Potable Water Inlet 5.12" 14.06" Optional for water and drain lines Serial Number Plate inside on upper base 1/2" FPT Cond. Drain (Water Cooled) 3/4" FPT Drain 22.5" 12.27" 3.12" 1.12" 6.43" SPECIFICATIONS Model Number MDT5N40A-1B MDT5N40W-1A MDT5N40W-1B MDT5N40A-6B MDT5N40W-6A MDT5N40W-6B MDT5N25A-1B MDT5N25W-1A MDT5N25W-1B MDT5N25A-6B MDT5N25W-6A MDT5N25W-6B Dimensions (w/o stand) 48.5 x 26 x 22.5 same same same same same 41 x 26 x 22.5 same same same same same H" x W" x D" Basic Electric 115/60/1 115/60/1 115/60/1 230/50/1 230/50/1 230/50/1 115/60/1 115/60/1 115/60/1 230/50/1 230/50/1 230/50/1 Cond. Ref. Charge, Minimum Circuit Type R-404A in ounces* Ampacity Air Water Water Air Water Water Air Water Water Air Water Water 24 18 17 24 18 17 24 18 17 24 18 17 19.3 17.8 17.8 11 10.4 10.4 19.3 17.8 17.8 11 11 11 Maximum Fuse Size 25 20 20 15 15 15 25 20 20 15 15 15 * Refrigerant charge change between A and B water cooled. Always check the nameplate for charge info. June 2002 Page 2 FOR THE INSTALLER: Environmental Limitations Installation Limitations This ice system is designed to be installed indoors, in a controlled environment. Air Temp Water Temp Water Pressure Voltage (115v) 500F. 400F. Minimum Maximum 1000F. 1000F. 80 PSI 126 MDT5N25 & MDT5N40 Service Limitations Do not install in a location where the top of the machine is within 6" of a fixed ceiling. Do not install air cooled models in a location where there is less than 6" clearance to the left and right of the cabinet. 20 PSI 104 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. Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance. They meet or exceed the standards of UL and NSF. Scotsman assumes no liability or responsibility of any kind for products manufactured by Scotsman that have been altered in any way, including the WALL use of any part and/or other components not CUT AWAY 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. Water Limitations An ice machine is a food manufacturing plant; it takes 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. This section is not intended as a complete resource for water questions, but it does offer these general recommendations: 1. Filter the water used to produce ice. That is the water going to the "potable" water connection. Water filters vary greatly in ability and function. Install one that filters out suspended solids to a dimension of 5 microns or smaller. The finer the filter the better, but finer filters will clog sooner than course ones. It may be necessary to add a course filter ahead of the fine filter to prolong filter life. 2. Check with a water treatment specialist for a water test, and recommendations regarding filters and treatment. 6" SPACE FOR AIR (A/C) Airflow CEILING CUT AWAY SPACE ABOVE FOR SERVICE SPACE FOR UTILITIES 6" SPACE FOR AIR (AIR COOLED) May 2001 Page 3 MDT5N25 & MDT5N40 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 above and behind it for service. Air cooled models require a minimum of 6 inches to the left and right of the machine for air circulation. 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 icemaker-dispenser. Place the cabinet onto the machine stand, so that the unit is lined up with the holes. Secure the ice maker-dispenser to the machine stand with bolts and washers. 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. Unpack and install the ice and water spouts. Ice Spout: Slide up and over ice outlet. No fastener is required to hold it in place. Water Spout: Slide over stainless steel water discharge tube, locate and match up with notches in the base. Rotate clockwise to move spout into installed position. Ice Spout SEAL THE UNIT TO THE COUNTER OR STAND Water Spout May 2001 Page 4 FOR THE INSTALLER: Wall Mount Kit CAUTION It is recommended that the wall mounting installation be done by an experienced contractor. The weight of the machine when in use may exceed 350 pounds. The unit should be mounted on a solid, rigid wall with proper fasteners for that type of wall and of adequate strength to support the weight of the machine when in use. Clearance between the wall and the icemaker is a maximum of 1 inch. Check utility connections first. The electrical junction box will have to be removed, and the electrical connections made inside the cabinet in compliance with local codes. The plumbing connections may be made through the base, or at either side through the pre-punched holes, using standard plumbing practices. Interior plumbing lines must be disconnected from the original connections and plugged when MDT6N40=38.6" routing through the side or base. 1. Remove machine top. Attach bracket "A" to machine using (3) nuts, (3) flat washers, (3) lock washers, and (3) 5/16-18 bolts received with the kit. MTD6N25=30" MDT5N25 & MDT5N40 BASE HOLE 1" CLEARANCE SIDE ROUTIN 7.83 16" 16" A DO NOT LIFT ON SINK 2. Mount brackets "B" and "C" to the wall at the dimensions shown for the unit. (hardware for this is not included). Use fasteners and wall of sufficient strength to carry the use and weight of the icemaker-dispenser. 3. Lift unit up and hook bracket "A" over bracket "B". Slide unit until the two remaining holes are aligned and secure with the remaining (2) 1/4-20 bolts, flat washers and lock washers. B 12" 12" C May 2001 Page 5 MDT5N25 & MDT5N40 FOR THE PLUMBER Water Inlet CONFORM TO ALL APPLICABLE CODES 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 test ...