User manual SCOTSMAN CS55

[. . . ] CS55 INTRODUCTION To the owner or user: The service manual you are reading is intended to provide you, and the maintenance or service technican, with the information needed to install, start up, clean and service this ice system. Table of Contents SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 1 FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2 FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ] It is tube is located in the ice storage bin on the a reverse acting temperature control with left side wall where is automatically shuts double throw contacts. Turning its knob all the icemaker off when the bin is full and the way counterclockwise also shuts off the restarts when ice is removed. settings are 1 degree C (36 degrees F) cut The control determines the length of the out and 4 degrees C (39 degrees F) cut in. freezing cycle and correspondingly the size It can be adjusted by turning the of the cube. A lower setting will produce a adjustment screw visible through the smaller cube, and a higher setting will control box cover. The cube size control Hot Gas Valve Assembly changes its contacts when the evaporator The hot gas valve assembly is comprised reaches its preset temperature, starting the of two parts, the valve body and the coil. When the sensing tube of These parts are located on the discharge the cube size control reaches the high line of the compressor and are activated by preset temperature, the contacts change the cube size control (harvest cycle). energized, it magnetically lifts the plunger The compressor toggle switch is located on in the hot gas valve body. When moved refrigerant gas to by-pass the condenser to the ON position, it makes a circuit to the and go directly to the evaporator. When moved to the OFF Spray Platform and Chute position, the other components will still The spray system used on this unit is of operate. The water is forced by Water Pump the water pump into the platform chamber The water pump operates during the and sprayed into the inverted cup molds freezing cycle only, pumping water through through a set of six spray nozzles. The fan motor is electrically connected Inlet Water Solenoid Valve through the cube size control and runs only The water solenoid valve, located in the during the freezing cycle. back panel of the unit, is energized only Hermetic Motor Compressor during the harvest or cleaning cycles. Both valves close, incoming water stops and hot gas is diverted back to the condenser. The harvest cycle is complete, and the freezing cycle DRAINS restarts. The automatic icemaking process continues until the bin is full of ice, and the bin thermostat senses a colder temperature. The bin thermostat then opens the circuit to all components and the automatic icemaking process stops. December, 1987 Page 8 CS55 HOW IT WORKS: REFRIGERATION FREEZE CYCLE From the condenser, the liquid refrigerant The ice cubes are formed in an inverted flows through the liquid line, and the liquid mold that is refrigerated. After the filter drier, the The refrigeration process begins at the liquid refrigerant enters the metering compressor. After passing the compressed and flows from the restriction of the capillary tube, the compressor through the discharge line as refrigerant enters an area of relative low a high temperature, high pressure gas. In the tubing of the discharge line there is a strainer with the evaporator, the liquid refrigerant two outlets, one leads to the condenser, expands and evaporates, absorbing heat and one to a solenoid valve. Because the from the evaporator tubing and anything in solenoid valve is closed, the gas flows to contact with it such as water sprayed the condenser, where heat is transferred against it. from the refrigerant to the air passing The refrigerant, now a low pressure, low through the condenser. [. . . ] Evacuate and recharge with nameplate charge Check and adjust for proper operation Blow charge, evacuate with new drier, weigh in nameplate charge. Clean Clean with Scotsman Ice Machine Cleaner Clean jets Check water supply Check and adjust for Replace December 1987 Page 13 CS55 SERVICE DIAGNOSIS Low Ice Capacity . . . . . . . . . . . . . . . . . . . . . Restricted system Replace valve Replace refrigerant Dirty condenser, Worn fan motor, High air temperature High water temperature Relocate machine or water line. Replace the refrigerant Replace the drier and refrigerant Poor harvest . . . . . . . . . . . . . . . . . . . . . . . . . . . . [. . . ]