User manual SCOTSMAN CME865W

[. . . ] CME865W & CME1002W INTRODUCTION This manual is intended as a reference for the installation of a Scotsman ice maker models CME865 and CME1002. Table of Contents INTRODUCTION SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 12 Page 13 Page 16 Page 17 Page 18 Page 20 Page 22 Page 23 Page 26 Page 27 PRODUCT INFORMATION . UTILITY CONNECTION LOCATIONS FOR THE INSTALLER: Environmental Limitations . FOR THE INSTALLER: Machine & Bin Assembly FOR THE PLUMBER FOR THE ELECTRICIAN: Electrical Connections FOR THE INSTALLER: Final Check List INITIAL START UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] Cube Size Control This reverse acting (closes on temperature fall) thermostat determines how long the freezing cycle will be. The cube size control closes it's 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. The single-pole, double throw microswitch on the timer controls the power to the plug in relay coil, making it either the freezing or harvest cycle. The microswitch is actuated by a cam assembly directly connected to the timer motor. Hot Gas Solenoid Valve The hot gas solenoid valve opens only during the harvest cycle. When it opens, it diverts the hot discharge gases so that they flow directly into the evaporator plates, by-passing the condenser and thermostatic expansion valve. The hot gases warm the evaporators, releasing the ice cubes from the ice cube molds. The hot gas solenoid valve is installed in a branch of the discharge line, and when the timer switches the ice machine into the harvest cycle, the energized solenoid coil lifts the valve stem within the valve body, allowing the hot discharge gas to be diverted to the evaporators. High Temperature Cut Out This temperature sensor is located next to the hot gas valve, on the outlet side. During normal operation, it does not affect the ice machine, but it will shut the machine off if the hot gas line overheats. It is an automatic reset. December, 1994 Page 13 CME865W & CME1002W COMPONENT DESCRIPTION Ice Level Control This electronic control uses sound waves to measure the distance between the bottom of the ice machine and the top of the ice in the bin. It is designed to control the machine's ice production to maintain that distance. The control is adjustable so that the ice machine will maintain a certain height of ice. It will not fill any closer to the ice machine than 8", and will not work if the distance to the bottom of the bin is greater than 8 feet. Because it uses sound waves, a slight "ticking" sound can be heard coming from the bottom of the machine. ON/OFF/WASH SWITCH ICE LEVEL SELECTOR SWITCH THE AMOUNT OF ICE MAINTAINED IN THE BIN CAN BE SELECTED BY THE USER FULL PARTIAL December, 1994 Page 14 CME865W & CME1002W COMPONENT DESCRIPTION Electric Water Inlet Valve The water inlet solenoid valve fills the reservoir assembly with water. Excess water overflows out the overflow standpipe located at the back of the reservoir. [. . . ] 4 37 94 6 39 96 · Close the valve and replace the caps when the job is finished. 8 41 98 The valve must be closed and the caps must be on or the valve 10 43 100 will leak. 12 46 102 General Information: 14 48 104 Work on the refrigeration system should only be done when it is certain 16 50 106 that the system needs repair. 18 53 108 · Refrain from checking refrigeration pressures without reason. [. . . ]