MCM1462R INTRODUCTION To the owner or user: This service manual 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. Table of Contents Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . For the Installer Location & Assembly Stacking ................................ 3 4 7 8 9 10 12 13 15 17 19 20 21 25 2 ..................................... ................................. .................................. .................................. For the Electrician For the Plumber Final Check List Initial Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Freeze Cycle Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Harvest Cycle Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Component Description ............................... Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Adjustments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Service Diagnosis ................................. Removal and Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Parts Lists and Wiring Diagrams are located in the center of this manual, printed on yellow paper. This manual was printed on recycled paper. April, 1993 Page 1 MCM1462R FOR THE INSTALLER The MCM1462R will fit Scotsman ice storage bin MDB900 and is stackable with stacking kit KSMCM48. Either a Scotsman remote condenser or a Mac 6 condensing system are required to for this ice system. Other items required: · Precharged tubing kit · Power cord and receptical · Condenser power cord · If stacking two units, a stacking kit · If using one unit, a caster kit for the bin. 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.S.A. 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 Model Number Dimensions (without bin) W" x D" x H" Basic Electrical Refrigerant Minimum Maximum Refrigerant Condenser Type Circuit Fuse Size Charge** Type Ampacity* R-22 20.5 30 256 oz. Remote Air MCM1462RS-3A 48 x 243/8 x 271/2 208-230/60/3 R-22 * Minimum Circuit Ampacity is used to determine wire size and type per the National Electric Code. ** The unit is shipped with the full charge in the receiver. For re-charging purposes, if the nameplate charge is different than this number, go by the nameplate. Use Scotsman remote condenser RC1422, or Mac 6. Use precharged tubing kit MLS2255 (55') or MLS2265 (65') or MLS2275 (75'). Power Cord is kit number: MPC Caster Kit is number: KBC9 This ice system (except remote condenser) is designed to be installed indoors, in a controlled environment. MINIMUM Air Temperature Water Temperature Water Pressure Voltage 50 F. 40 F. 20 psi -5% April, 1993 Page 2 0 0 MAXIMUM 1000F. 1000F. 80 psi +10% MCM1462R FOR THE INSTALLER: Location & Assembly 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. Try to avoid hot, dirty and crowded locations. Be sure that the location for the machine is within the envrionmental limitations. Storage Bin: Tip the storage bin on its back, using parts of the carton to protect the exterior finish. Install the casters, use a heavy duty leg kit if stacking two ice machines on one bin. 1. Arrange for proper electric, water and drain. See instructions for the plumber and for the electrician. 2. After mounting the casters, position the ice storage bin in the selected location: Note: Allow enough space to the left and back to service the machine. Do NOT push the bin into postion, instead, lift it there. Pushing a bin may damage the legs and leg mounts. Level the bin in both the front to rear and side to side directions by adjusting the leg levelers. 3. Inspect the bin top mounting gasket which should be flat, with no wrinkles, to provide a good water seal when the cuber is installed on top of the bin. 4. Install the bin bumpers onto the top edge of the bin, so that they hang-over the back. Ice Maker: Install the modular cuber on top of the bin using care to be sure a good seal is made between the two cabinets. Use of a mechancial lift is recommended. Align the holes in the bottom rear of the cabinet to mate with the two mounting holes on the top rear of the bin. Use bolts and straps found on the back of the ice machine to secure the ice machine to the bin. When alignment and leveling are completed, tighten the bolts to secure the mounting straps. Remove the front panel, and remove the evaporator shipping brackets and hardware. SHIPPING BRACKETS ICE MACHINE AND BIN ASSEMBLY April, 1993 Page 3 MCM1462R FOR THE INSTALLER: Location & Assembly Stacking Instructions A stacking kit, KSMCM48, is required to interconnect the ice level controls, seal the freezing compartments, support the bin with heavy duty legs, and retain the front panels. Follow the installation instructions of the stacking kit, but in general: The first thing to do when adding a unit is to replace the bin casters (if the unit has been installed with casters) wtih heavy duty legs. Casters must not be used with two ice machines on one bin. When stacking two units, remove the top panel and the evaporator cover from the lower icemaker. STACKING (The top removed from the lower icemaker will no longer have any function.) Add a strip of gasket (from the stacking kit) to the top edge of the bottom ice machines evaporator compartment. Install the panel retaining bracket onto the bottom ice machine before placing the upper unit on it. Place additional gasket onto the top edges of the bottom ice machine. Carefully lift the uncrated top unit onto the bottom one and align the two cabinets. Use of a mechanical lift is recommended for this step. At the back of the two icemakers, bolt the upper icemaker cabinet to the lower icemaker cabinet using the mounting straps and bolts from the hardware package. Add the relay kit to interconnect the two ice machine's bin control circuits. PANEL RETAINING BRACKET EVAPORATOR COVER April, 1993 Page 4 MCM1462R FOR THE INSTALLER: Scotsman Remote Condenser Locate the condenser as near as possible to the interior location of the ice maker. Location of the condenser is limited by the specific length of precharged refrigerant tubing supplied for the application. The pre-charged tubing connects the icemaker to the remote condenser. The condenser must be above the ice maker. Select the best available location, protecting the condenser from extremes of dirt, dust, and sun. Meet all applicable building codes. Roof Attachment: Install and attach the remote condenser unit to the roof of the building, using the methods and practices of construction that conform to the local building codes, including having a roofing contractor secure the condenser to the roof. Precharged Line Routing /////////////////////////////CAUTION/////////////////////////////// Do not connect precharged tubing until all routing and forming of the tubing is complete. See the coupling instructions for connecting instructions. //////////////////////////////////////////////////////////////////////////// 1. Each set of precharged refrigerant lines consists of a 3/8 inch diameter liquid line, and a 1/2 inch diameter discharge line. Both ends of each line have quick connect couplings, the end without access valves goes to the icemaker. Note: The openings in the building ceiling or wall, listed in the next step, are the minimum sizes recommended for passing the refrigerant lines through. 2. Have the roofing contractor cut a minimum hole for the refrigerant lines of 1.75". Check local codes, a separate hole may be required for the electrical power to the condenser. /////////////////////////////CAUTION//////////////////////////////// DO NOT KINK OR CRIMP REFRIGERANT TUBING WHEN INSTALLING IT. //////////////////////////////////////////////////////////////////////////// 3. Route the refrigerant lines through the roof opening. Follow straight line routing whenever possible. Any excess tubing MUST be retained within the building. 4. Spiral any excess length of pre charged tubing inside the building. Use a horizontal spiral to avoid any traps in the lines. 5. Have the roofing contractor seal the holes in the roof per local codes. 6. The flexible end of the tubing must be installed behind the icemaker; it is to be looped down from the ice machine connection area then back up the wall behind the ice machine. This allows un-stacked units to be pulled out for service. REFRIGERANT CONNECTIONS LOCATE CONDENSER NO LOWER THAN ICE MACHINE TYPICAL INSTALLATION April, 1993 Page 5 MCM1462R FOR THE INSTALLER: Mac 6 Remote Condenser MAC 6 INSTALLATION ELECTRICAL CONNECTION TO ICE MACHINE DISCHARGE LINE FROM ICE MACHINE LIQUID LINE TO ICE MACHINE Precharged Line Routing /////////////////////////////CAUTION/////////////////////////////// Do not connect precharged tubing until all routing and forming of the tubing is complete. See the coupling instructions for connecting instructions. //////////////////////////////////////////////////////////////////////////// 1. Each set of precharged refrigerant lines consists of a 3/8 inch diameter liquid line, and a 1/2 inch diameter discharge line. Both ends of each line have quick connect couplings, the end without access valves goes to the icemaker. Note: The openings in the building ceiling or wall, listed in the next step, are the minimum sizes recommended for passing the refrigerant lines through. 2. Have the roofing contractor cut a minimum hole for the refrigerant lines of 1.75". Check local codes, a separate hole may be required for the electrical power to the condenser. /////////////////////////////CAUTION//////////////////////////////// DO NOT KINK OR CRIMP REFRIGERANT TUBING WHEN INSTALLING IT. //////////////////////////////////////////////////////////////////////////// 3. Route the refrigerant lines through the roof opening. Follow straight line routing whenever possible. Any excess tubing MUST be retained within the building. 4. Spiral any excess length of pre charged tubing inside the building. Use a horizontal spiral (as illustrated) to avoid any traps in the lines. 5. Have the roofing contractor seal the holes in the roof per local codes. 6. The flexible end of the tubing must be installed behind the icemaker; it is to be looped down from the ice machine connection area then back up the wall behind the ice machine. This allows un-stacked units to be pulled out for service Mac 6 Connections: The condenser circuits used for the ice machine are located in the area shown, and are labeled. This Scotsman ice machine uses R-22, be certain that the circuit being used also contains R-22, not dry air or R-502. If in doubt about the type of refrigerant, do not complete the connections at the ice machine end until the tubing and condenser circuit have been connected, evacuated and a few ounces of R-22 added. April, 1993 Page 6 MCM1462R FOR THE INSTALLER: Coupling Instructions ////////////////////////////////CAUTION///////////////////////////////// The couplings on the sets of precharged lines are self sealing when installed properly. Carefully follow the instructions: //////////////////////////////////////////////////////////////////////////////// Initial Connections: 1. Remove the protector caps and plugs. Wipe the seats and threaded surfaces with a clean cloth to be certain that no foreign matter remains on them. 2. Lubricate the inside of the couplings, especially the O-Rings with refrigerant oil. · The 1/2 inch discharge line (schrader valve end) goes to the remote condenser fitting marked "discharge line". · The 3/8 inch liquid line (schrader valve end) goes to the remote condenser fitting marked "liquid line". Final Connections: 3. Begin tightening the couplings together by hand, then using two wrenches (it is important that ONLY the nut on the precharged lines be turned, the other parts of the couplings must NOT be allowed to turn or the process will tear out the diaphragms and they will be loose in the refrigeration system) tighten the coupling until it bottoms out or a definite increase in resistance is felt. TIGHTENING THE QUICK CONNECTS SCHRADER VALVES 4. Using a marker or pen, mark a line lengthwise from the coupling u ...