ND550 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 ND550 is a combination nugget ice maker and countertop dispenser, with the option of wall mounting. A water station may be added, if desired. The ND550 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 R502 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Environmental Limitations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Wall Mount Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Glass Filler Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 Soda Valve Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 For the Plumber For the Electrician Start Up ..................................... 8 ................................... 9 Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Component Description Electrical Sequence Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Service Diagnosis Removal and Replacement Water Reservoir Bin Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27 Breaker and Bearing Water Seal Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 Gearmotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 Electronic Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 Parts Lists and Wiring Diagrams are printed on yellow paper in the center of this manual. December, 1988 Page 1 ND550 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 (KSP1B) 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. 20.5" 4.5" 3.54" ELECTRCIAL JUNCTION BOX NAMEPLATE on inside of right side panel 2.56" 3/8" FPT Condenser Water Inlet (Water Cooled) 3/8" Flare Potable Water Inlet 5.12" 14.06" 1.88"dia Optional for water and drain lines 22.5" 1/2" FPT Cond. Drain (Water Cooled) 3/4" FPT Drain 12.27" 3.12" 1.12" 6.43" SPECIFICATIONS Model Number Dimensions (w/o stand) H" x W" x D" 41 x 26 x 22.5 same same same Ice Type NUGGET same same same Condenser Cabinet Type Finish Air Water Air Water Painted Painted Stainless Stainless Basic Electrical 115/60/1 115/60/1 115/60/1 115/60/1 Minimum Circuit Ampacity+ 16.7 16.2 16.7 16.2 Maximum Fuse Size 20 20 20 20 ND550AE-1A ND550WE-1A ND550AS-1A ND550WS-1A + Minimum Circuit Ampacity is used to figure wire size and type per National Electric Code. August, 1989 Page 2 ND550 FOR THE INSTALLER: Environmental Limitations Installation Limitations than 6" clearance to the left and right of the This ice system is designed to be installed indoors, cabinet. in a controlled environment. Minimum Maximum 0 1000F. Air Temp 50 F. 1000F. Water Temp 400F. 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. Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance. They meet or exceed the CEILING standards of UL, NSF, and CSA. CUT AWAY 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 WALL specifically approved by Scotsman. CUT AWAY 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. SPACE Water filters vary greatly in ability and function. FOR Install one that filters out suspended solids to a UTILITIES dimension of 5 microns or smaller. The finer the 6" SPACE filter the better, but finer filters will clog sooner FOR AIR than course ones. It may be necessary to add a course filter ahead of the fine filter to prolong filter (AIR COOLED) life. 2. Check with a water treatment specialist for a water test, and recommendations regarding filters and treatment. 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 December, 1988 Page 3 SPACE ABOVE FOR SERVICE 6" SPACE FOR AIR (A/C) ND550 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 it's 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 "feet" on the icemaker-dispenser. Place the cabinet onto the machine stand, so that the unit "snaps" into place. 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. SEAL THE UNIT TO THE COUNTER OR STAND August, 1989 Page 4 ND550 FOR THE INSTALLER: Wall Mount Kit /////////////////////////WARNING/////////////////////////////// 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 routing 30" through the side or base. 1. Remove machine top. Attach bracket "A" to machine using (3) nuts, (3) flat washers, (3) lockwashers, and (3) 5/16-18 bolts received with 7.58" the kit. BASE HOLE 1" CLEARANCE SIDE ROUTING 16" 16" A DO NOT LIFT ON SINK B 12" 12" 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 lockwashers. C December, 1988 Page 5 ND550 FOR THE INSTALLER: Water Glass Filler Kit Installation Instructions for KWGF ///////////////////////////CAUTION//////////////////////////////// Shut off potable water supply to icemaker dispenser. ///////////////////////////////////////////////////////////////////////// ///////////////////////////WARNING//////////////////////////// Disconnect electrical power to icemaker dispenser. ////////////////////////////////////////////////////////////////////////// 1. Remove screws, and remove top panel 2. Remove screws, and remove both front panels. 3. Remove screws, and remove the filler plate-scrap the plate. 4. Locate water solenoid valve assembly and two red wires in the kit. Attach the (2) red wires to the solenoid terminals. 5. Locate the water line assembly and the water line adapter. Connect to water solenoid valve. Fitting size will determine location. 6. Remove plug from potable water line. 7. Install valve plate and switch assembly to the dispenser, replace the filler plate removed in step 3. 8. Attach the water solenoid assembly to the underside of the upper compartment using (2) screws and lockwashers into the threaded holes provided. 9. Attach the water line adapter and solenoid valve assembly to water line where plug was removed in step 6. 10. Attach clamp and #8-32 x 3/4 phillips machine screw to secure the water line assembly. 11. Insert glass filler lever through PLUG the square slot in the valve plate and switch assembly. Attach to dispenser with (2) arm clamps and (2) #6-32 x 1/2 machine screws. 12. Check and adjust the microswitch so that the glass filler lever pushes the micro-switch button. 13. Attach the glass filler lever spring to glass filler lever. The large hook goes to the filler lever, the small one to the hole in the dispenser base directly below. 14. Attach the red wire connected to the solenoid to the switch on the valve plate. Attach the blue wire to the switch on the valve plate. · Route the free red wire from the solenoid, attach to the terminal strip to the second terminal from the left. · Route the blue wire from the switch to the control box, attach the red wire to the terminal strip and attach the blue wire to the leftmost terminal. 15. Turn on water, check for leaks. Replace panels, switch on power supply, check operation. TOP PANEL FILLER PLATE ARM CLAMPS SPRING SWITCH PLATE ASSEMBLY VALVE CLAMP WATER LINE August, 1989 Page 6 ADAPTER ND550 FOR THE INSTALLER: Soda Valve Kit Installation Instructions Note: Carbonator and carbonated product cooling system are not included. //////////////////////////WARNING//////////////////////////// Disconnect electrical power to the icemaker dispenser. //////////////////////////////////////////////////////////////////////// 1. Remove cabinet top panel, front panel, and splash panel. 2. Remove screws and remove filler plate from the ice maker dispenser. 3. Remove large plug from base of icemaker-dispenser. 4. Install valve assembly in the ice machine with two screws through the same holes that held on the valve cover plate. Install 1-3/8" ID insulation tube over the syrup and carbonated lines. 5. Route product lines through the hole in the base. 6. Make all required connections soda line connections, using field supplied materials. All lines should b ...