CS60 INTRODUCTION This service manual covers the installation, operation, maintenance and service of this ice machine. Table of Contents INTRODUCTION .............................. Page 1 Page 2 Page 3 Page 4 Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 15 Page 16 Page 17 SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . FOR THE INSTALLER ............................ FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . INSTALLATION ............................... INITIAL START UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . HOW IT WORKS: COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . COMPONENT LOCATION . . . . . . . . . . . . . . . . . . . . . . . . . . . HOW IT WORKS: WATER . . . . . . . . . . . . . . . . . . . . . . . . . . . HOW IT WORKS: REFRIGERATION HOW IT WORKS: REFRIGERATION ...................... ...................... .......... OPERATION & ADJUSTMENT: OPERATING CHARACTERISTICS SANITIZING AND CLEANING SERVICE DIAGNOSIS SERVICE DIAGNOSIS ......................... ............................ ............................ REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . Service Parts lists and Wiring diagrams are located in the center of this manual, printed on yellow paper. This manual was printed on recycled paper. Keep this manual for future reference. Note the Warning symbol, it marks a possible hazard. January 1995 Page 1 CS60 SPECIFICATIONS 17 9/16" 28.42" 5.5" 18" 20.6" NAMEPLATE LOCATION 3/4" HOSE COUPLING THREAD 25/32" 2 .2" POWER 2 .2" 1 .76" 5 .4" 3.83" SPECIFICATIONS Model Number Basic Max. Fuse Electrical Size 28.42 X 18 X 20.6 Medium 115/60/1 15 Dimensions H" X W" X D" Cube Size Refrigerant Charge is 12 oz of R-22. Always go by the namepate. CS60MAS-1A The finish is stainless steel. Minimum circuit ampacity is used to determine wire size per national electric code. Refrigerant type is R-22. OPERATING REQUIREMENTS: MINIMUM MAXIMUM Air Temperature Water Temperature Water Pressure Voltage 50 F. 400 F. 20 PSIG 103.5V 0 100 F. 1000 F. 100 PSIG 126.5V 0 Scotsman assumes no liability or responsibility of any kind for products manufactured by Scotsman that have been altered in any way, including the use of any parts and/or other components not specifically approved by Scotsman. Scotsman reserves the right to make design changes and/or improvements at any time. Specifications and designs are subject to change without notice. Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance. They meet or exceed the standards of UL and NSF. January 1995 Page 2 CS60 FOR THE INSTALLER Location: Prior consideration for the location shall include: · Air circulation: The front panel MUST remain unobstructed. Do not block with any type of · Indoors, with a minimum room temperature of 0 door or curtain. 50 F. and a maximum room temperature of 0 If the unit is built in, it will pull air in from the right 100 F. side of the front panel, and exhaust it out the left · Water temperature to the machine should be 0 0 side of the front panel. If the left side of the between 40 F. and 100 F. machine is left open, warm air will be · Service Access. Allow enough space at the discharged from the left side panel. back of the cabinet for the utilities to be connected. Allow enough space for the machine to be pulled out from its installed IF BUILT IN, THIS SIDE location. Do not build a floor in front of the SHOULD BE TIGHT AGAINST machine that would prevent its removal. THE CABINET TO PREVENT AIR RECIRCULATION COOL AIR INTAKE WARM AIR DISCHARGE January 1995 Page 3 CS60 FOR THE PLUMBER Water supply and drain connections. 1. The recommended water supply line is a 1/4" o.d. copper tube, the water pressure must have a minimum incoming pressure of 20 psig. 2. Connect the tubing to the 3/4" hose coupling thread water inlet fitting at the back of the ice maker. An optional adapter to go from the 3/4" hose coupling thread to 1/4" compression fitting is available from your dealer under part number 0533238. Or a similar adapter can be purchased from a hardware store. 3. Install a shut off valve in the incoming water line near the ice maker so that the water can be shut off for service. 4. Connect a gravity drain line to the drain connection at the ice maker. A minimum slope of 1/4" fall per foot of horizontal run is recommended. Install the drains per the local codes. A vent is recommended on the highest point of the drain tube, and the drain tubing must be rigid pipe. Do NOT use flexible tubing. POWER SUPPLY LEVEL THE UNIT POWER CORD WATER SUPPLY SHUT OFF WATER FILTER (FIELD SUPPLIED) DRAIN ADAPTER (FIELD SUPPLIED) ELECTRICAL 1. Locate the nameplate on the lower rear panel and check that the location source voltage and capacity are correct for this unit. The unit is equipped with a grounded plug connection. Under no circumstances must the ground post be altered or removed. Extension cords are not permitted. Be certain that the ice maker is connected to its own electrical circuit and is individually fused. The maximum allowable voltage variation should not exceed ten percent of the nameplate rating. All external wiring should conform to the National, State, and local electrical code requirements. Usually an electrical permit and the services of a licensed electrician will be required to install the receptacle. January 1995 Page 4 CS60 INSTALLATION FINAL CHECK 1. Is the Cabinet level? 2. Have all the electrical and piping connections been made? 3. Has the voltage been tested and checked against the nameplate rating? 4. Is the unit plugged into a separate electrical circuit? 5. Is the water supply line shut off valve installed and is the water turned on? 6. Have the bin interior, and the cabinet exterior been wiped clean? 7. Are all internal parts in place, including the spray platform and curtain? 8. Have the internal refrigerant lines been checked for rubbing and chaffing? 9. Has the machine been installed where it is indoors, in a controlled environment, with adequate air circulation around the machine, and where it can be serviced? POWER? LEVEL? DRAINS? WATER? January 1995 Page 5 CS60 INITIAL START UP 1. Open water supply valve. 2. Move electrical breaker or switch to the on position. 3. Remove front panel. 4. Check the cube size control shaft, it should be in a preset cube size position. If not, turn it clockwise until the unit comes on. Note: cube size adjustments may be required. Start with the shaft in the "mid" position. 5. The machine will go thru a "dry" cycle, this will take about 10 minutes. Then the water fill and harvest cycle will begin. 6. Observe the water fill cycle: If the cubes are overfilled, adjust the machine to make smaller ice cubes by turning the cube size control counter-clockwise. In both cases, the next cycle of cubes harvested must be observed, and further corrections may be needed. If the ice cubes are cloudy, an extreme water condition may exist. Confirm that they are cloudy by placing them in a glass of cold water. If, in the water, they remain cloudy, you may want to have the water tested by a water treatment specialist. If the ice cubes are cloudy only on the bottom or in the center, the machine may be running out of water before the end of the freezing cycle. 10. Test the bin full shut off. To test this, hold some ice on the bin thermostat bracket (the stainless steel tube on the left side of the ice storage bin). The ice maker should stop within a few minutes of having ice on that tube. 11. Fill out the Warranty Registration and Customer Evaluation form, and mail both to Scotsman. 12. Make sure the user understands the operation and maintenance requirements for the ice maker. Leave the service manual and the name of the local Scotsman service agency with the user. · The water inlet valve opens. · Incoming water flows from the valve through the tubing to the top of the ice maker. · Water flows around the inverted ice cube cups and drains through holes into the reservoir. · The reservoir begins to fill up with water. · Water continues to enter the machine and overflows a standpipe in the reservoir and down the drain. This will take about 3 1/2 minutes. After that the freeze cycle will begin. 7. Check the operation of the freezing cycle: · Compressor is running. · Water pump is spraying water through the spray nozzles. · Ice making begins, the water gets very cold, and ice begins to form in the cube molds. 8. Check that the plastic curtain assembly hangs down evenly in the opening and that no large streams of water are passing through. Note: Some water will drip from the reservoir as the machine runs. This is normal. 9. After about 20 minutes the machine will begin to release the ice, this is called the harvest cycle. Observe the first cube harvest: · Check the size of the ice cubes. Note: The normal size of the ice cube has a 1/4" depression in the wide end. If the cubes are not filled out, adjust the machine to make larger ice cubes by turning the cube size control shaft clockwise. January 1995 Page 6 CS60 HOW IT WORKS: COMPONENT DESCRIPTION Cube Size Control The cube size control is located in front of the control box, behind the front panel. The sensing capillary tube of the cube size control is routed out of the control box into its bulb holder on the evaporator coil. It is a reverse acting temperature control with double throw contacts. Turning its knob all the way counterclockwise also shuts off the ice maker. The control determines the length of the freezing cycle and correspondingly the size of the cube. A lower setting will produce a smaller cube, and a higher setting will make a larger cube. The cube size control changes its contacts when the evaporator reaches its preset temperature, starting the harvest cycle. When the sensing tube of the cube size control reaches the high preset temperature, the contacts change again, restarting the freeze cycle. Compressor Toggle Switch. The compressor toggle switch is located on the side of the control box. When moved to the ON position, it makes a circuit to the compressor. When moved to the OFF position, the other components will still operate. Water Pump The water pump operates during the freezing cycle only, pumping water through the spray nozzles into the inverted spray cups. Inlet Water Solenoid Valve The water solenoid valve, located in the back panel of the unit, is energized only during the harvest or cleaning cycles. When energized it allows a metered amount of water to flow into the machine (.21 g.p.m.) This water flows to the top of the evaporator and then down into the reservoir. Bin Thermostat Control The bin thermostat control body is located in front of the control box just beside the cube size control. The thermostat sensing tube is located in the ice storage bin on the left side wall where is automatically shuts the ice maker off when the bin is full and restarts when ice is removed. Factory settings are 1 degree C (36 degrees F) cut out and 4 degrees C (39 degrees F) cut in. It can be adjusted by turning the adjustment screw visible through the control box cover. Hot Gas Valve Assembly The hot gas valve assembly is comprised of two parts, the valve body and the coil. These parts are located on the discharge line of the compressor and are activated by the cube size control (harvest cycle). When the coil of the hot gas valve is energized, it magnetically lifts the plunger in the hot gas valve body. This allows hot refrigerant gas to by-pass the condenser and go directly to the evaporator. Spray Platform and Chute The spray system used on this unit is of the stationary type. The water is forced by the water pump into the platform chamber and sprayed into the inverted cup molds through a set of six spray nozzles. Fan Motor The fan motor is electrically connected through the cube size control and runs only during the freezing cycle. Hermetic Motor Compressor The compressor is a vapor pump, forcing refrigerant gas throughout the refrigeration system. January 1995 Page 7 CS60 COMPONENT LOCATION SPRAY PLATFORM EVAPORATOR RESERVOIR FILL TUBE WATER PUMP WATER RESERVOIR BIN LEVEL CONTROL TUBE BIN DRAIN BIN THERMOSTAT CONTROL BOX HOT GAS VALVE WATER INLET VALVE COMPRESSOR CUBE SIZE & ON/OFF CLEANING SWITCH January 1995 Page 8 CS60 HOW IT WORKS: WATER Freezing cycle The refrigeration process creates cold temperatures within the evaporator coils and removes heat from the water sprayed up into the inverted ice cube cups. When enough heat is removed, the water changes into ice, and forms where it is the coldest: in the ice cube cups. Minerals contained in the supply water will not freeze and are drained away. Mostly pure water will be frozen into the ice cubes. During the freezing ...