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 .............................................................................................. Page 3 INSTALLATION ....................................................................................................... Page 4 INITIAL START UP .................................................................................................. Page 5 HOW IT WORKS: COMPONENT DESCRIPTION ................................................. Page 6 COMPONENT LOCATION ...................................................................................... Page 7 HOW IT WORKS: WATER ...................................................................................... Page 8 HOW IT WORKS: REFRIGERATION ..................................................................... Page 9 HOW IT WORKS: REFRIGERATION ..................................................................... Page 10 OPERATION & ADJUSTMENT: OPERATING CHARACTERISITCS .................... Page 11 SANITIZING AND CLEANING ................................................................................ Page 12 SERVICE DIAGNOSIS ............................................................................................ Page 13 REMOVAL AND REPLACEMENT .......................................................................... Page 15 CS55 SPECIFICATIONS 17 9/16" 28.42" 5.5" 18" 20.6" NAMEPLATE LOCATION 3/4" HOSE COUPLING THREAD 25/32" 2 .2" POWER CORD 2 .2" 1 .76" 5 .4" 3.83" SPECIFICATIONS Model Number Dimensions H" X W" X D" (W/O Legs) 28.42 X 18 X 20.6 Bin Capacity 28 lbs. Ice Production 24 hours 55 lbs. Cube Size Small Basic Comp. Electrical H.P. 115/60/1 1/5 Min. Circ. Ampacity 6.1 Max. Fuse Size 15 Ship. Wht. 100 lbs. CS55SAE-1A The finish is enamel sandalwood. Minimum circuit ampacity is used to determine wire size per national electric code. OPERATING REQUIREMENTS: MINIMUM MAXIMUM 0 1000 F. Air Temperature................... 50 F. 0 1000 F. Water Temperature.............. 40 F. Water Pressure.................... 20 PSIG 100 PSIG Voltage................................. 103.5V 126.5V 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. 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. December, 1987 Page 1 CS55: FOR THE INSTALLER Location: · · · Prior consideration for the location shall include: Indoors, with a minimum room temperature of 500F. and a maximum room temperature of 1000F. Water temperature to the machine should be between 400F. and 1000F. Service Access. Allow enough space at the back of the cabinet for the utilities to be connected. Allow enough space for the machine to be pulled out from its IF BUILT IN, THIS SIDE SHOULD BE TIGHT AGAINST THE PANEL TO PREVENT AIR RECIRCULATION Air circulation: The front panel MUST remain unobstructed. Do not block with any type of door or curtain. If the unit is built in, it will pull air in from the right side of the front panel, and exhaust it out the left side of the front panel. If the left side of the machine is left open, warm air will be discharged from the left side panel. · installed location. Do not build a floor in front of the machine that would prevent its removal. COOL AIR INTAKE WARM AIR DISCHARGE December, 1987 Page 2 CS55 INSTALLATION ELECTRICAL, WATER, AND DRAIN 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 icemaker. An optional adaptor 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 adaptor can be purchased from a hardware store. POWER SUPPLY 3. Install a shut off valve in the incoming water line near the icemaker so that the water can be shut off for service. 4. Connect a gravity drain line to the drain connection at the icemaker. 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. LEVEL THE UNIT POWER CORD WATER SUPPLY SHUT OFF VALVE WATER FILTER (FIELD SUPPLIED) DRAIN ADAPTOR (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 icemaker 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 December, 1987 Page 3 CS55: INSTALLATION FINAL CHECK 1. Is the Cabinet level? 7. Are all internal parts in place, including 2. Have all the electrical and piping the spray platform and curtain? connections been made? 8. Have the internal refrigerant lines been 3. Has the voltage been tested and checked for rubbing and chaffing? checked against the nameplate rating? 9. Has the machine been installed where it 4. Is the unit plugged into a separate is indoors, in a controlled environment, with electrical circuit? adequate air circulation around the 5. Is the water supply line shut off valve machine, and where it can be serviced? installed and is the water turned on? 6. Have the bin interior, and the cabinet exterior been wiped clean? POWER? LEVEL? DRAINS? WATER? December, 1987 Page 4 CS55 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: 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: · · · · · · The water inlet valve opens. Incoming water flows from the valve through the tubing to the top of the icemaker. Water flows around the inverted ice cube cups and drains through holes into the reservoir. The reservoir begins to fill up with water. Extra water flows thru the purge valve for 15 seconds and then the fan and pump will stop. · · · Water continues to enter the machine and overflows a standpipe in the reservoir and down the drain. This will take about 2 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 nozzels. Icemaking 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. 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. 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. See page 11. 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 icemaker 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 icemaker. Leave the service manual and the name of the local Scotsman service agency with the user. · December, 1987 Page 5 CS55 COMPONENT LOCATION JET CAP SPRAY PLATFORM SPINNER DISC EVAPORATOR RESERVOIR OVERFLOW TUBE RESERVOIR FILL TUBE WATER PUMP WATER RESERVOIR BIN LEVEL CONTROL TUBE BIN DRAIN BIN THERMOSTAT CONTROL BOX HOT GAS VALVE WATER INLET VALVE COMPRESSOR CUBESIZE & ON/OFF CLEANING SWITCH December, 1987 Page 6 CS55 HOW IT WORKS: COMPONENT DESCRIPTION Cube Size Control The cube size control is located in front of Bin Thermostat Control the control box, behind the front panel. The bin thermostat control body is located The sensing capillary tube of the cube size in front of the control box just beside the control is routed out of the control box into cube size control. The thermostat sensing its bulb holder on the evaporator coil. 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. Factory icemaker. 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. make a larger cube. 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. harvest cycle. 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). again, restarting the freeze cycle. When the coil of the hot gas valve is Compressor Toggle Switch. energized, it magnetically lifts the plunger The compressor toggle switch is located on in the hot gas valve body. This allows hot the side of the control box. 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. compressor. 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 stationary type. 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 spray nozzles into the inverted spray Fan Motor cups. 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. The compressor is a vapor pump, forcing When energized it allows a metered refrigerant gas throughout the refrigeration amount of water to flow into the machine system. (.21 g.p.m.) This water flows to the top of the evaporator and the ...