User manual SCOTSMAN CMS1002W

[. . . ] CMS1002W INTRODUCTION This manual is intended as a reference for the installation of a Scotsman ice maker model CMS1002. TABLE OF CONTENTS Page Specifications For the Installer Machine & Bin Assembly . 3 September, 1993 Page 1 CMS1002W 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. A serial number plate with the model number, serial number and refrigerant charge is located behind the front panel, near the control box. The refrigerant charge information is for recharging, should that be necessary. [. . . ] 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. MICROSWITCH SHAFT OF CAM HARVEST PORTION TIMER CAM POSITIONS ACTUATOR MICROSWITCH CAM & SHAFT FREEZE PORTION TIMER ADJUSTMENT SET SCREW September, 1993 Page 10 CMS1002W 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 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. September, 1993 Page 11 CMS1002W 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. [. . . ] Twist inner portion of transducer counterclockwise and push up gently. Reverse steps 1-5 to reassemble. TRANSDUCER LOCATION SOCKET IN ICE MACHINE BASE TRANSDUCER PLUG CONNECTION REMOVAL OF TRANSDUCER September, 1993 Page 20 CMS1002W REMOVAL AND REPLACEMENT /////////////////////////////////WARNING///////////////////////////// Disconnect electrical power before beginning. /////////////////////////////////////////////////////////////////////////////// Cube Size Control To remove the cube size control: 1. Trace capillary tube, from the cube size control to the refrigerant suction line. [. . . ]