User manual SCOTSMAN CMS1402

[. . . ] CMS1402 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 5 6 7 8 10 11 12 15 17 19 20 23 2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . For the Electrician For the Plumber Final Check List Initial Start Up . [. . . ] The outer surface, or large diameter lobe of the timer cam, determines the timer cycle for finish freezing of the ice cubes, while the inner surface, or small diameter lobe, determines the time cycle for the harvest cycle. When the microswitch button is pushed in there is power connected to the coil of the relay, and the unit is in the freeze cycle. When the microswitch button is released, the power to the relay is stopped, and the unit goes into harvest. The microswitch is actuated by a cam assembly directly connected to the timer motor. High Pressure Safety Control This is a manual reset control that shuts down the icemaker, should the discharge pressure ever reach 450 PSIG (air cooled) or 350 PSIG (water cooled). Found below the control box. CUBE SIZE CONTROL RELAY TIMER AND MICROSWITCH ICE/OFF/WASH SWITCH BIN ICE LEVEL SELECTOR SWITCH September 1993 Page 12 CMS1402 COMPONENT DESCRIPTION Bin 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. When set at FULL it will not allow the machine to fill the bin any closer to the ice machine than about 8", and it will not work if the distance to the bottom of the bin is greater than 8 feet. BIN ICE LEVEL SELECTOR SWITCH ICE/OFF/WASH SWITCH Because it uses sound waves, a slight "ticking" sound can be heard coming from the bottom of the machine. There are two parts to the control, the circuit board, and the level control switch. THE USER CAN SELECT THE AMOUNT OF ICE TO BE MAINTAINED IN THE BIN. SOUND WAVES FULL PARTIAL September 1993 Page 13 CMS1402 COMPONENT DESCRIPTION Water Inlet Solenoid Valve The water inlet solenoid valve fills the sump assembly with water. Water Distribution System The water distribution system functions to evenly supply water to all cells of the evaporator plates. The water pump pumps water from the sump up the vertical tygon tube to the tee. From there water is channeled through the water manifold to the water distributors, above each evaporator plate, and from six holes within each distributor, water flows to the cells of each side of the evaporator plates. Gravity flow returns the unfrozen excess portion of water to the sump reservoir for recirculation. Hot Gas Solenoid Valve The hot gas solenoid valve opens only during the harvest cycle, to divert the hot discharge gas from the compressor, by passing the condenser and capillary tube, for direct flow to the evaporator plates to release ice cubes from the ice cube molds. SUMP STANDPIPE Fan Pressure Control - Air-Cooled Models only. WATER DISTRIBUTORS ln both freeze and harvest cycles, the fan pressure control functions to maintain a minimum discharge pressure by cycling the fan on and off. Strainer WATER FILTER A water strainer is located in the potable inlet water HAND line before the water inlet solenoid valve. Clean VALVE the water strainer frequently. SUMP PUMP COMPONENT LOCATION September 1993 Page 14 DRAIN CAP CMS1402 CLEANING ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// A Scotsman Ice System represents a sizable investment of time and money in any company's business. In order to receive the best return for that investment, it MUST receive periodic maintenance. Maintenance and Cleaning should be scheduled at a minimum of twice per year. ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////// CLEANING: ICEMAKER 7. Remove the control box cover, and rotate the shaft of the timer and switch assembly CLOCKWISE advancing to the freezing cycle. Remove the hose clamp, rubber cap and drain all the water from the sump assembly into a container. [. . . ] · This system has a critical charge, it must be recharged with the correct amount of refrigerant as listed on the nameplate of the ice machine, or performance will suffer. · Anytime the refrigeration system has been opened, the dryer should be replaced. · When brazing the tubing connections to the hot gas valve or thermostatic expansion valve, the component must be protected by heat sink material. There are various mechanical devices that may be used to recycle refrigerant at the field level, however, Scotsman requires that any refrigerant placed into a Scotsman ice machine meet ARI spec 700. [. . . ]