User manual SCOTSMAN MCM1062

[. . . ] MCM1062R INTRODUCTION This manual is intended as a reference for the installation and service of a Scotsman ice maker model MCM1062. This model is a remote condenser cuber, 30" wide and may be connected to a Mac 6 or a Scotsman remote condenser. This ice machine uses R-22. TABLE OF CONTENTS Page Specifications For the Installer Machine & Bin Assembly . 3 Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper. October 1993 Page 1 MCM1062R SPECIFICATIONS Always refer to the nameplate, located on the back of the cabinet, for the: · model number, · serial number, · basic electrical requirements, · minimum circuit ampacity, · maximum fuse size, · and refrigerant charge. [. . . ] If left as factory set, four and one-half minutes comprise the freezing cycle portion during cam rotation, and the final three and one-half minutes is the defrost/harvest cycle. Rotating the shaft of the timer cam clockwise will put the ice machine in the freeze or harvest cycle. ////////////////////////////// WARNING /////////////////////////////// Disconnect electrical power supply to icemaker whenever adjustment procedures are performed. /////////////////////////////////////////////////////////////////////////////// To adjust the timer & switch assembly: HARVEST PORTION 1. To start the HARVEST CYCLE: Slowly rotate the shaft of the timer and switch assembly clockwise until the actuator arm on the microswitch begins the harvest cycle. An audible click can be heard, but in a noisy area, look at the cam and switch to observe the event B. To start the FREEZING CYCLE: Slowly rotate the shaft of the timer and switch assembly clockwise, until the actuator arm on the microswitch starts the freezing cycle. To adjust the length of the harvest cycle: FREEZE PORTION TIMER ADJUSTMENT MICROSWITCH SHAFT OF CAM 1. Loosen the adjustment screw on the cam, and rotate the shaft of the cam to move the top part of the assembly. More of a gap between the high and low portions will yield more harvest time. lt is important that the length of the harvest cycle allow enough time for all the ice cubes to fall from the evaporator. Too short of a time will cause the evaporator to freeze up and stop ejecting ice into the bin. Adjustment of the harvest cycle may require an adjustment of the cube size control. SET SCREW October 1993 Page 14 MCM1062R COMPONENT DESCRIPTION Compressor Contactor The compressor contactor carries the compressor line current. The contactor is wired so any control in the pilot circuit, such as the bin control, and high pressure controls, etc. , will cause the contactor holding coil to be de energized, when the control contact OPENS, thereby breaking the circuit to the compressor. Cube Size Control This reverse acting (closes on temperature fall) thermostat determines how long the freezing cycle will be. The cube size control closes its contacts when the evaporator cools to the set temperature, starting the timer. A variation in heat load (either ambient air or incoming water temperature) will affect the efficiency of the refrigeration system, and that will vary the length of time it takes the evaporators to cool to the temperature at which the cube size control is set to close, which, in turn, will affect the overall cycle time. Relay The multi-function, three pole, double throw, relay plugs into a socket on the printed circuit board in the control box. The relay functions in part to by-pass the bin control during the harvest and freeze cycles, preventing the icemaker from shutting off in the middle of a cycle. The bypass action allows only complete freeze and harvest cycles; the only time that the ice maker can shut off on bin control is as the end of the harvest cycle. Timer - Timer & Switch Assembly The timer begins to turn when activated by the cube size control. The outer surface, or large diameter lobe of the timer cam, determines the length of time for finish freezing of the ice cubes, while the inner surface, or small diameter lobe, determines length of the harvest cycle. [. . . ] Reverse steps 1-5 to reassemble. TRANSDUCER LOCATION TRANSDUCER SOCKET TRANSDUCER PLUG CONNECTION REMOVAL OF TRANSDUCER October 1993 Page 26 MCM1062R REMOVAL AND REPLACEMENT /////////////////////////////////WARNING////////////////////////////// Disconnect electrical power before beginning. ///////////////////////////////////////////////////////////////////////////////// Water Distributor Tubes And Manifold Tubes To remove the water distributor tube and manifold tube: 1. Slide the water distributor tube to the front about 1/8-inch along the top of the evaporator plate, until the water distributor tube can be unsnapped from the flexible notch and lifted upward to the right side. Unsnap and disconnect water distributor tubes from the water manifold section. [. . . ]