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Home Explore Service Manual - FME1200RL, FME1500RL

Service Manual - FME1200RL, FME1500RL

Published by Scotsman®LATAM, 2016-07-23 13:23:00

Description: Service Manual - FME1200RL, FME1500RL


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TO THE OWNER OR USER: Single System RLThe service manual you are reading is intended to This Remote Low side unit is the freezer portion ofprovide you, and the maintenance or service a commercial ice machine. It is designed to betechnician, with the information needed to install, connected to the condensing section of astart up, clean, maintain and service this ice refrigeration system, specifically a supermarketsystem. R-404A system. Table of ContentsFOR THE INSTALLER: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3FOR THE ELECTRICIAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 5FOR THE INSTALLER: Final Check List Initial Start Up . . . . . . . . . . . . . . . . . . Page 6COMPONENT IDENTIFICATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7COMPONENT DESCRIPTION: Control Box . . . . . . . . . . . . . . . . . . . . . . . . Page 8COMPONENT DESCRIPTION: Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . Page 9ELECTRICAL SEQUENCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 11OPERATION: Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 12MAINTENANCE AND CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15SERVICE DIAGNOSIS: Condition - No Ice Being Produced . . . . . . . . . . . . . . . . Page 16REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 18REMOVAL AND REPLACEMENT: Bearing And Breaker . . . . . . . . . . . . . . . . . . Page 19REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 21REMOVAL AND REPLACEMENT: Evaporator . . . . . . . . . . . . . . . . . . . . . . . Page 22REMOVAL AND REPLACEMENT: Gearmotor . . . . . . . . . . . . . . . . . . . . . . . Page 23CIRCUIT BOARD TESTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 24Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper.This manual was printed on recycled paper. Keepit for future reference.Note the Warning symbol where it appears. Itmarks a potential hazard. January 1997 Page 1

Single System RLFOR THE INSTALLER: SpecificationsThe unit is designed to fit a variety of Scotsman Scotsman Ice Systems are designed andstorage bins. See sales literature for more manufactured with the highest regard for safetyinformation. and performance. They meet or exceed the standards of U.L., N.S.F., and C.U.L.Installation Limitations: The remote low side isdesigned for indoor installations only. The machine Scotsman assumes no liability or responsibility ofmust also be in a controlled environment where any kind for products manufactured by Scotsmanthe air temperature does not fall below 500F., or that have been altered in any way, including thego above 1000F. use of any parts and/or other components notThe water temperature must be between 400F. specifically approved by Scotsman.and 1000F. Scotsman reserves the right to make designThe electrical power supply must not drop below changes and/or improvements at any time.-5% of the lowest nameplate voltage or go above Specifications and designs are subject to change10% of the highest nameplate voltage. without notice.SPECIFICATIONS:Model Cabinet Size System Refrigerant BTUH required Voltage Ice TypeFME1200RL 21\"w x 27\"h x 24\"d 208-230 FlakerNME950RL 21\"w x 27\"h x 24\"d R-404A 8,000 208-230 NuggetFM1202RL 21\"w x 27\"h x 24\"d 208-230 FlakerNM952RL 21\"w x 27\"h x 24\"d R-404A 8,000 208-230 NuggetFME1500RL 21\"w x 27\"h x 24\"d 208-230 FlakerNME1250RL 21\"w x 27\"h x 24\"d R-22 8,000 208-230 Nugget R-22 8,000 R-404A 8,000 R-404A 8,000 January 1997 Page 2

Single System RLFOR THE INSTALLERSelect the Location:The unit can only be installed indoors TYPICAL INSTALLATION: ALLOW ROOM FOR SERVICE ACCESSwithin the limitations described onpage 2.The ice machine will have to be FME1200RLconnected to the building’srefrigeration system, check to besure that the system has enoughextra capacity to handle a minimumof additional 8,000 BTU’s per hour @1100F. liquid line temperature(assume a 00F. evaporatortemperature).Storage Bin:Using a mechanical lift, install the icemachine onto the top of the storagebin.Fasten the ice machine to the binusing (4) 5/15-18 2.5\" cap screws.Level the assembly by:a. Turning the leg levelers in or outon the standard legs.b. Use shims under the heavy dutylegs of the KLP4.Locate the Nameplate: The BX87 BINnameplate is located on the back EXTENSIONpanel of the machine, and containsthe electrical characteristics B90 STORAGE BINparticular to the unit being installed.Refrigeration Installation:The skills of a refrigeration technicianare required to connect the icemachine to the buildings refrigerationsystem.Notes: •Suction Line and Liquid Line Stubs are at the back of thecabinet.•1.5 ounces of the appropriate refrigerant is in the system as a holding charge.•Be sure there is enough BTU capacity.•Be sure that the liquid connection is NOT in series with another liquid line valve.•Local Codes must be observed.•A P-trap should be installed where there will be more than 10’ of vertical rise in the suction line. January 1997 Page 3

Single System RLFOR THE ELECTRICIANCONFORM TO ALL APPLICABLE CODESElectrical Connections: DETAIL OF JUNCTION BOXLocate the nameplate for the currentrequirements, and then determine the JUNCTIONwire size and type per the National BOXElectric Code. The machine requires asolid chassis to earth ground wire. POWER SUPPLYRefer to the wiring diagram. The icemachine should be connected to it’sown electrical circuit, and beindividually fused.Voltage, when the unit is under fullload, must remain within the limitationslisted on page 2.LOW VOLTAGE CAN CAUSEEQUIPMENT MALFUNCTIONAND/OR DAMAGEAll external wiring should conform tothe National, State, and local electricalcodes. Usually the services of alicensed electrician will be required. January 1997 Page 4

Single System RLFOR THE PLUMBER CONFORM TO ALL APPLICABLE CODESWater Supply: Drain System:The recommended water supply line is 3/8\" O.D. All drains are of the gravity type, and must have acopper tubing, with a minimum operation pressure minimum of 1/4\" fall per foot of horizontal run. Theof 20 PSIG, and a maximum of 80 PSIG. Connect drains must be installed to conform to localto cold water using the male flare connection at plumbing codes. The use of a vent at the machinethe back of the machine. Install a shut off valve in and at the bin will allow the system to drainan accessible space between the ice maker and properly. Use only rigid tubing for drains; insulationthe water supply. of the bin drain is recommended.SHUT OFF 3/8\" MALE FLARE VALVE 3/4\" FPT VENT THIS DRAIN WATER INLET FIELD SUPPLIED BIN DRAIN WATER FILTERFLOOR DRAIN January 1997 Page 5

Single System RL Initial Start Up 1. Remove the top and front panels.FOR THE INSTALLER: 2. Open the water valve, and observe that the twoFinal Check List float reservoirs fill up with water and shut off.1. Is the unit installed where the air and watertemperatures are within and will remain within the 3. Switch on the electrical power.limitations for the unit? 4. Open the hand valve (in the liquid line).2. Is there 6\" clearance at the rear of the machinefor utility connections? 5. Open the ball valve (in the suction line).3. Has the water supply line be checked for 6. Switch on the master switch, and observe:pressures between 20 and 80? The liquid line valve opens The gearmotor runs4. Has the unit been leveled? Within a short time, that side of the machine begins to make ice.5. Has the shipping material been removed from Water flows from the water reservoir, and the floatinside the cabinet? drops, letting in more water.6. Have the electrical connections been made? 7. When operating, the sight glass should remain7. Have the drains been installed and checked for full, and the low side pressure will be about:leaks? RLE1202/952 - 25 PSIG + or - 2 PSIG RLE1200/950 - 36 PSIG + or - 2 PSIG8. Has the refrigeration supply been installed and RLE1500/1250 - 25 PSIG + or - 2 PSIGchecked for leaks? Gearmotor amp draw should not exceed the nameplate rating.9. Has the bin and cabinet been wiped clean orsanitized? 8. Check the system very carefully for any refrigerant leaks, repair as needed.10. Has the warranty registration card beenproperly filled out and mailed to Scotsman?11. Has the owner been given the service manualand been instructed on how to maintain the icemaker?13. Has the owner been given the name andtelephone number of the local Scotsman serviceagency?November 1999 Page 6

COMPONENT IDENTIFICATION Single System RLLiquid line valve amount from the outlet temperature. The result is the superheat. Use an electronic thermometer.This valve operates to turn the ice making process EPR: Evaporator Pressure Regulator Valveon and off. This valve maintains a constant pressure on its inlet (evaporator) side regardless of the pressureWhen the ice level drops in the ice chute, the ice on the outlet (suction) side. The EPR is factorylevel sensor will cause the circuit board to close set, adjust only if needed. After adjusting, re-checkthe liquid line relay, which energizes the liquid line TXV superheat.valve. The liquid line valve opens, and liquid EPR Settings:refrigerant flows to the thermostatic expansion RLE1202/952: 25 PSIG + or - 2 PSIGvalve. RLE1200/950: 36 PSIG + or - 2 PSIG RLE1500/1250: 25 PSIG + or - 2 PSIGThermostatic Expansion Valve Evaporator: Where the water is frozen into ice crystals. As theThe metering device of the system, the valve water cools, it begins to turn into ice, and thesenses the temperature of the suction line and slowly turning auger lifts the ice, as it is beingvaries the amount of liquid refrigerant that passes made, and forces it up and out of the “breaker” orthrough the valve into the evaporator, thus spout where the extra water is compressed out ofmaintaining a constant level of refrigeration. TXV’s the ice. The ice then drops through the chute, intoare factory set. Do not adjust unnecessarily. the storage bin.DO NOT ADJUST THE TXV UNTIL THE EPRHAS BEEN SET.The superheat setting is 4-80F. Measure thetemperature of the evaporator outlet at the TXVbulb, and check the low side pressure at the EPRvalve. Convert the pressure to temperature (usinga temperature pressure chart) and subtract the EPR VALVETHERMO VALVELIQUID LINE VALVE November 1999 Page 7

Single System RLCOMPONENT DESCRIPTION: Control BoxCircuit Board: Controlling the ice machinethrough sensors and relays. The sensors are: icelevel, and water level. The relays are for the gearmotor (with a built in time delay to clear theevaporator of ice when the unit turns off) and forthe liquid line valve.Transformer: Supplies low voltage to the circuitboard.On/Off Switch: Manual control for that side of themachine. ON/OFF SWITCH TERMINAL STRIPTRANSFORMER CIRCUIT BOARD January 1997 Page 8

Single System RLCOMPONENT DESCRIPTION: EvaporatorEvaporator: A refrigerated vertical tube filled Motor: A split phase motor that drives the gearwater and containing a water seal and auger. reducer.Auger: A solid stainless steel double spiral auger, Bearing: As the ice is pushed up the evaporator,it pushes the ice crystals up to the top of the the auger is thrust down, and pressure from theevaporator. auger thrust is taken up by this bearing.Water Seal: A two part \"face\" seal, the top halfrotating with the auger, the bottom half stationary,the sealing action being where the two seal \"faces\"meet.Ice Sweep: A plastic cap with \"fingers\". It revolveswith the auger to \"sweep\" the ice into the ice chute.Divider: Where the ice is compressed and muchof the extra water is squeezed out of it before it isdischarged into the bin.BEARING ICE SWEEP DIVIDER EVAPORATOR AUGERWATER SEAL MOTOR January 1997 Page 9

Single System RL Shut Down consists of:ELECTRICAL SEQUENCE •The liquid line relay opens. •The liquid line valve closesRefer the wiring diagram as needed. •Ice making stops •The auger motor is run by the circuit board for 2Each system is separate more minutes, clearing out ice in theIf the machine is switched off at the master switch, evaporator, and thenbut is otherwise ready to go, switching the masterswitch to on does the following: •The auger motor relay opens, and the auger •The bin empty light on the circuit board goes on motor stops. •There is a 15 second delay •If there is enough water in the reservoir, the If the ice level sensor is clear (bin empty) for more than 15 seconds, the machine will start up again. circuit board will allow the machine to start up. Another purpose of the circuit board is to turn theStart up consists of: machine off if there is not enough water in the machine. •The liquid line relay and auger motor relay •When the water level in the reservoir falls become energized, connecting power to the windings of the auger motor. below the water level sensor, the machine will \"shut down\" •The auger motor starts, and the centrifugal •When the water refills the reservoir, the switch closes, connecting power to the liquid line valve coil. machine will start up again. •The liquid line valve opens, and the refrigerant Separate from the circuit board: flows to the thermostatic expansion valve and •The master switch is the manual control for into the evaporator. each system, but it is not a service disconnect. •As ice goes past the ice level sensors, the bin empty light will stay on, and the machine will continue to run, unless the ice stays between the sensors for more than 15 seconds (bin full). At that point, the bin empty light goes out, and the machine shuts down.January 1997 Page 10

OPERATION Single System RLWater The water then goes out the bottom of theWater enters the machine through the 3/8\" male reservoir tank to the bottom of the evaporator.flare at the rear of the cabinet, goes to the water Reservoir overflow or evaporator condensation isreservoir which it enters through the float valve. routed to the drain.WATER RESERVOIR ICE CHUTE INLET WATER LEVEL EVAPORATOR WATER SCHEMATIC WATER INLET DRIP PAN DRAIN January 1997 Page 11

Single System RL LIQUID LINEOPERATION: Refrigeration SIGHT GLASSThe remote high side supplies highpressure liquid refrigerant to the HAND VALVEliquid line connection on the ice LIQUID LINEmachine. After the sight glass, thereis a liquid line leading to a liquid line VALVEvalve. When the ice level sensor THERMO VALVEcauses the circuit board to energizethe liquid line valve, the valve EVAPORATORopens, allowing the liquid refrigerantto enter the expansion valve. The BALL VALVEthermostatic expansion valvemeters the liquid refrigerant into the EPR VALVEevaporator, where it boils off(evaporates) and absorbs heat. Itthen moves through the ball valveand into the evaporator pressureregulator valve, or EPR. The EPRkeeps the evaporator pressureabove a predetermined point, eventhough the suction line pressure ofthe remote high side system mayvary. The refrigerant, now a lowpressure gas, moves into thesuction line of the remote high sidesystem. SUCTION LINE January 1997 Page 12

Single System RLMAINTENANCE AND CLEANINGA Scotsman Ice System represents a sizable investment of time and money in any company’s business. Inorder to receive the best return for that investment, it MUST receive periodic maintenance.It is the USER’S RESPONSIBILITY to see that the unit is properly maintained. It is always preferable, andless costly in the long run, to avoid possible down time by keeping it clean; adjusting it as needed; and byreplacing worn parts before they can cause failure. The following is a list of recommended maintenancethat will help keep the machine running with a minimum of problems.Maintenance and Cleaning should be scheduled at a minimum of twice per year.ICE MAKING SYSTEM: In place cleaning 12. Go thru steps 13-19 to sanitize the ice machine water system.1. Check and clean any water treatment devices, 13. Mix two gallons of sanitizer solution. Use anif any are installed. approved sanitizer. A possible sanitizer solution may be obtained by2. Pull out and remove the front panel. mixing two gallons of warm (90-115oF.) potable water with 1 ounce of household bleach.3. Move the ON-OFF switch to OFF. 14. Slowly pout the sanitizer solution into the water reservoir until the float rises, then switch the4. Remove all the ice from the storage bin. master switch ON. 15. As the ice machine uses water from the5. Remove the cover to the water reservoir and reservoir, continue to pour the sanitizer solutionblock the float up. into the reservoir. 16. After 1⁄2 of the sanitizer solution has been6. Drain the water reservoir and freezer assembly added to the reservoir, and the reservoir is nearlyusing the drain tube attached to the freezer water empty, switch the master switch OFF.inlet. Return the drain tube to its normal upright 17. Drain the reservoir and thoroughly wash theposition and replace the end cap. interior of the reservoir and cover with sanitizer solution. Be sure the drain hose is upright and7. Prepare the cleaning solution: Mix eight capped.ounces of Scotsman Ice Machine Cleaner with 18. Remove the block from the float in the waterthree quarts of hot water. The water should be reservoir.between 90-115 degrees F. 19. Switch the master switch to ON 20. Continue ice making for at least 15 minutes, to Scotsman Ice Machine flush out any cleaning solution. Cleaner contains acids. These compounds may DO NOT USE any ice produced from the cause burns. cleaning solution. Be sure no ice remains in If swallowed, DO NOT the bin. induce vomiting. Give large amounts of water or 21. Remove all ice from the storage bin. milk. Call Physician 22. Add warm water to the ice storage bin and immediately. In case of thoroughly wash and rinse all surfaces within the external contact, flush with bin. water. 23. Sanitize the bin interior by washing the interior Keep out of the reach of of the bin with the balance of the sanitizer solution. children. 24. Switch the master switch ON.8. Slowly pour the cleaning solution into the waterreservoir until it is full. Wait 15 minutes, thenswitch the master switch to ON.9. As the ice maker begins to use water from thereservoir, continue to add more cleaning solutionto maintain a full reservoir.10. After all of the cleaning solution has beenadded to the reservoir, and the reservoir is nearlyempty, switch the master switch to OFF.11. After draining the reservoir, as in step 6, washand rinse the water reservoir.January 1997 Page 13

Single System RLMAINTENANCEElectrical Shock Hazard SLIDE ICEElectrical shock can cause LEVELpersonal injury.Disconnect electrical CONTROLS OUTpower before beginning. OF CHUTE1. The bin control uses devices that sense light, CLEAN THE ICEtherefore they must be kept clean enough so that LEVEL CONTROLthey can \"see\". At least twice a year, remove thebin control sensors from the base of the ice chute, SENSORSand wipe the inside clean, as illustrated.2. The ice machine senses water level by a probelocated in the water reservoir. At least twice ayear, the probe should be removed from thereservoir, and the tip wiped clean of mineralbuild-up. Inspect the assembly, looking for wear. See Removal and Replacement to replace bearing or seals. Reverse to reassemble. 4. Check and tighten all bolts and screws.RESERVOIR ICE SWEEP CLEAN THE BREAKER WATER LEVEL COVER SENSOR ///////////////////////////// CAUTION: THE TIMP IS MADE OF GLASS ///////////////////////////////3. The bearing in the breaker should also bechecked at least two times per year.Check the bearing by: •pushing the bail clamp back and removing the ice chute cover •unscrewing the ice sweep •unscrewing the breaker cover •unscrewing the auger stud January 1997 Page 14

CLEANING Single System RLIn some installations the water supply to the ice Switch off electrical power, and shut off themaker will be so concentrated with dissolved water supply.minerals, (such as calcium carbonate) that as ice For more information on removal of theseis made, the evaporator and auger become parts, see REMOVAL AND REPLACEMENT.coated with the minerals, requiring a more 1. To remove the auger, remove front and topfrequent cleaning than twice per year. If in doubt panel. If top panel cannot be removed, or if thereabout the condition of the evaporator and auger, is less than 6\" clearance over the top of thethe auger can be removed so the parts can be machine, the gearmotor/evaporator may be slidinspected. out for service access. See Removal And Replacement.Note: Water filters can filter out suspended solids, 2. Push bail clamp back and remove ice chutebut not dissolved solids. \"Soft\" water may not be cover.the complete answer. Check with a water 3. Unscrew and remove ice sweep.treatment specialist regarding water treatment. 4. Loosen band clamp under ice chute, and remove ice chute from evaporator.DIVIDER, AUGER ALLEN HEAD 5. Remove 4 allen head screws holding breaker to AND SLOTTED SCREWS evaporator. COLLAR 6. Pull up on breaker to remove auger. Allow the auger to dry, the stainless steel of the auger and evaporator must be clean and bright. Clean the auger and evaporator as required. DO NOT HONE THE EVAPORATOR. 7. Replace the water seal. 8. Reverse to reassemble. January 1997 Page 15

Single System RLSERVICE DIAGNOSIS: Condition - No Ice Being ProducedSTATUS: NOTHING OPERATESA. Check: Voltage to the unit, restore it if there is none. Compare to the nameplate.B. Check: The master switch, switch ON if off.C. Check the water level in the reservoir. The machine will not run if there is not enough water in thereservoir. Restore/adjust water level.STATUS: NOTHING OPERATESD. Check: The gear motor, if it will not run, the liquid line valve will not open. If no power to it:Check: The indicator lights on the circuit board, the bin empty light should be ON, the no water lightshould be OFF . 1. If the bin empty and no water lights are off, check the transformer. a. Transformer \"load\" side should have 12 to 15 volts. If not, check the \"line\" side. The line side should have between 208-230 volts. If the line side has the correct voltage and the load side does not, replace the transformer. 2. If the transformer is good, and the bin empty light is OFF, check the ice level sensors. a. Remove sensors by sliding them sideways out of the ice chute. Visually inspect them, clean if needed. b. Look through the ice chute \"eye\" hole for something blocking the ice chute. c. If the unit still does not run, replace the ice level sensors. d. If the bin empty light is still OFF, check the circuit board. SEE LAST PAGE FOR TESTERINFORMATION 3. If the transformer is fine, and the \"no water\" light is ON, check the water level sensor. a. Check the water level in the reservoir, restore if low. If the water level is ok: b. Remove the water level sensor from the reservoir and clean the tip if dirty. CAUTION: THE TIP IS MADE OF GLASS c. Replace the water level sensor. If the no water light is still on, check that the \"water sen\" plug is firmly plugged into the circuit board. d. If the no water light is still on, SEE LAST PAGE FOR TESTER INFORMATION e. If after the above, the machine still will not run, replace the water level sensor January 1997 Page 16

Single System RLSTATUS: GEARMOTOR OPERATES, BUT NO ICE IS MADEA. Check the liquid line valve relay. The relay is on the circuit board, if it does not supply power to the liquid line valve, the valve will not open. 1. Check for power at the valve coil, if none: a. Check for power at the liquid line valve relay at the circuit board. If there is power at the relay, but none at the liquid line valve coil, Check for an open wire between the relay and the valve. 2. Check the valve coil. If the coil is open, replace the liquid line valve. 3. Check the auger drive motor centrifugal switch. If, when the drive motor is running, contact 4 (black wire removed) has no power, and all of the above switches have been checked, replace the centrifugal switch, or the drive motor. 4. If the liquid line valve relay on the circuit board has power on the NO contact, but not on the COMcontact, replace the circuit board. January 1997 Page 17

Single System RL BIN CONTROLS (Ice Level Sensors)REMOVAL AND REPLACEMENT 1. Disconnect electrical power.WATER RESERVOIR 2. Remove front panel.1. Shut off the water supply to the ice maker.2. Remove front panel and reservoir cover. 3. Remove control box cover.3. To remove float only, disconnect water inlettube, push in the tab behind the reservoir and pull 4. Locate ice chute, at the base of the chute, invalve assembly out of the reservoir tank. front of and behind it are two plastic bin control4. To remove reservoir, disconnect water inlet mounts.compression fitting at reservoir inlet.5. Remove drain hose from reservoir. 5. Slide each bin control to the left, and in the6. Remove evaporator inlet hose from reservoir. control box, disconnect the electrical leads7. Remove mounting screws from reservoir connecting the bin control to the circuit board.bracket, and remove reservoir from ice maker.8. Reverse to reassemble. 6. Reverse to reassemble, be certain that the bin controls are aligned so that the ice level sensors are visible (centered) through the holes in the cube chute.Internal SLIDE BINPlunger CONTROLS IN AND OUT Float Valve January 1997 Page 18

Single System RLREMOVAL AND REPLACEMENT: Bearing And BreakerNote: Removal of the auger, water seal, . Lift up, and remove breaker/bearing assemblyevaporator and gearmotor must begin at the top of from auger & evaporator.the assembly.To Remove the Breaker Bearing Assembly: 6. Service the bearing. Check for rust, rough spots and damage. Electrical Shock Hazard Electrical shock can cause a. The bearing is pressed into the breaker, to personal injury. remove the bearing and replace it an arbor press Disconnect electrical is needed. power before beginning. b. Replace lower seals before installing new1. Remove panels and disconnect electrical power. bearing in breaker.2. Push back bail clamp, remove insulationretaining strap and insulation, remove ice chute Note: seals must be pressed in with a tool pushingcover. against the outer edge only, they will not install by3. Unscrew and remove ice sweep. hand.4. Loosen band clamp under ice chute, lift up andremove ice chute. Replace parts as required. Re-grease bearing with5. The breaker may be removed from the auger Scotsman part no. 19-0609-01 bearing grease.and evaporator without disturbing the auger. Replace top seal, and check the o-rings, replace ifa. Unscrew breaker cover from breaker (left hand cut or torn.threads)b. Unscrew auger stud from top of auger. 7. Reverse to reassemble: specific tools andc. Unscrew 4 allen head cap screws holding materials are required to install properly.breaker to evaporator. a. Add food grade grease such as Scotsman part number 19-0569-01 to the seal area before installing on the auger. b. Check the seal to shaft areas for cuts, or rough spots: none are permitted.Step 5- a dStep 5-b Step 5-c and Step 6 ICE SWEEP BEARING SEALS SLOTTED COLLAR AUGER STUD BREAKER COVER DIVIDER January 1997 Page 19

Single System RL d. Lift up and remove breaker from evaporator. e. If the auger is stuck use a slide hammer typeREMOVAL AND REPLACEMENT puller to pull on the auger at the threaded hole. The size of that hole is 5/8\"-18.To Remove the Auger: Inspect the auger, the critical areas of the augerTurn off the water to the machine, and unclip the are:evaporator drain hose, pull it down and drain the 1. The auger body. It should be clean andevaporator into the bin or a container. shining. Sometimes an auger will appear clean when wet, but after it is dry it will be seen to be Electrical Shock Hazard stained. Scrub the auger with ice machine cleaner Electrical shock can cause and hot water. personal injury. Disconnect electrical Ice machine cleaner is an acid. Handle it with power before beginning. extreme care, keep out of the reach of children.1. The top panel must be removed. 2. The water seal area. Because the auger has2. Remove ice chute cover. been removed, the water seal will have to be3. Unscrew ice sweep. replaced. Remove the water seal top half from the4. Loosen band clamp and remove ice chute body. auger, and inspect the auger for minerals clean as5. The auger and breaker/bearing may now be required.removed as an assembly.a. Unscrew 4 allen head cap screws holdingbreaker to evaporator.b. Lift up on breaker and remove auger fromevaporator. DIVIDER AND AUGERASSEMBLY SLIDE HAMMER PULLER THREAD INTO THE AUGER HERENote: If the auger is stuck, the breaker must beremoved from the auger.The breaker may be removed from the auger andevaporator without disturbing the auger.a. Use spanner wrench and unscrew breakercover from breaker (left hand threads)b. Unscrew auger stud from top of auger.c. Unscrew 4 allen head cap screws holdingbreaker to evaporator. January 1997 Page 20

REMOVAL AND REPLACEMENT Single System RL Moving Parts Hazard. To Replace the Water Seal: Moving parts can cause 1. Lubricate the water seal with water, and push personal injury. the water seal into the bottom of the evaporator Disconnect electrical slightly past the grove for the snap ring. power before beginning. 2. Replace the snap ring and pull the water seal down against it.To Remove the Water Seal: 3. The part of the water seal that rotates with the(Assuming all steps to remove the auger have auger must also be replaced. Remove the old partbeen performed.) from the auger and clean the mounting area.1. The gearmotor/evaporator assembly will have to 4. Place a small bead of food grade silastic sealantbe exposed. (such as 732 RTV or Scotsman part number2. Remove the 4 hex head cap screws holding the 19-0529-01) on the area of the auger where theevaporator to the gearmotor assembly. Lift the water seal is to be mounted.evaporator up and off of the gearmotor. 5. Carefully push the water seal (rubber side3. Remove the snap ring or wire retainer from the against the auger shoulder and the silastic.)grove under the water seal.4. Pull or drive out the lower half of the water seal. CAUTION Do not get any silastic onto the face of the seal. 6. Allow the auger and seal to air dry until the silastic is dry on the surface. 7. If the original water seal was leaking, it would be a good idea to inspect the interior of the gearmotor.WATER PLACE FOOD SEAL GRADE SEALANTRETAINING HERE RING January 1997 Page 21

Single System RLREMOVAL AND REPLACEMENT: EvaporatorTo Replace the Evaporator: To Reassemble the Evaporator and Auger 1. After the gearmotor has been inspected, fasten(Assuming all the steps for removal of the thrust the evaporator to the gear motor, torque the boltsbearing, breaker, auger, and water seal have been to 110 inch pounds.performed.) 2. Lower the auger into the evaporator barrel, slightly turning it to match up with the drive end.1. Shut the hand valves in the liquid and suction Do Not Drop Into the Evaporator.lines to the evaporator being serviced; then 3. Complete the reassembly by reversing thedischarge the refrigerant. disassembly for the breaker & thrust bearing assembly.2. Unsweat the refrigerant connections: AUGERa) At the thermostatic expansion valve outlet. CAUTION EVAPORATORHeat sink the TXV body when unsweating or DRIP PANresweating the adjacent tubing.b) At the suction line at the joint about 3\" from theevaporator.3. Remove theevaporator.4. Unsweat the drier ICE SWEEPfrom the liquid line.5. After installing anew water seal in thenew evaporator (see\"To Replace theWater Seal\") sweat inthe new evaporator atthe old connections.6. Install an new drierin the liquid line.7. Evacuate the BEARINGsystem untildehydrated, thenweigh in thenameplate charge.Check for leaks.8. Install auger,breaker, breakerbearing assembly,and ice dischargechute in reverse orderof disassembly. See\"To ReassembleEvaporator and Auger\" DIVIDER/BREAKER January 1997 Page 22

Single System RLREMOVAL AND REPLACEMENT: GearmotorTo Remove and Repair the Gearmotor D) After replacing parts as required, (if any)Assembly: reassemble the gearcase. The two smaller gears and the oil should be in the lower case, the output(Assuming that the procedures through removal of gear will be with the cover. As you lower the coverthe water seal have been performed.) onto the lower case, cover will have to be moved closer to the second gear after the output gear has1. Remove the electrical wires from the gear drive cleared the second gear top bearing.motor. E) After the case is together, and the locating pins are secure in both ends, replace all cap screws.2. Unscrew the 4 cap screws holding the 4. Bench test the gearmotor, check for oil leaks,gearmotor to the gearmotor plate. noise, and amp draw.3. Remove the gearmotor from the ice maker. SEAL MOTORTo Inspect the gearmotor. BEARINGA) Remove the cap screws holding the gearmotorcase halves together and pry the two cases apart. GASKETB) To lift off the cover, lift up until you can feelinternal contact, then pull the cover towards theoutput gear end, and thenlift the cover (with drivemotor attached) up andaway from the gear motorcase.Note: The case coveroutput gear, bearings, andshaft are one pressedtogether assembly.Replace as a unit.C) Inspect the oil, gears, GEARCASEand bearings. If the oillevel and condition isacceptable, quickly checkthe gears and bearings.They are likely to be fine ifthe oil is.If there is evidence ofwater in the oil (rustybearings and gears; the oilhaving a creamy whiteappearance; oil level toohigh) carefully inspect thebearings and gears. If indoubt about the conditionof a part, replace it. The oilquantity is 16 fluid ounces,do not overfill.Note: The gears andbearings are available onlyas pressed together sets. January 1997 Page 23

Single System RLCIRCUIT BOARD TESTINGThese procedures require the machine to be connected to the power supply. The voltages of theelectronic circuit are very low, but HIGHER VOLTAGES ARE PRESENT IN THE UNIT. Do not touchanything but the tester while the unit is being checked out. Make all connections to the circuit board withthe ELECTRICAL POWER OFF.INSTRUCTIONS FOR USING TESTER, (Optional, order part no. A33942-001)(These instructions assume that the unit will not run, and prior investigation of electric power, controls,and mechanical parts indicates that the electronic circuit may be at fault.)Note: All testing is done with the electrical power If the Bin Empty light is ON, wait 10-20 seconds foron, the master switch on. the machine to start, if the machine starts, replace the ice level sensors.1. Unplug ‘‘photo trans’’ and ‘‘LED’’ connectors If the Bin Empty light does not come ON, thefrom the circuit board. circuit board should be replaced. Water Level2. Plug ‘‘photo trans’’ and ‘‘LED’’ connectors fromthe tester into the circuit board. a. Move ‘‘water’’ switch on tester to No Water position. The No Water light on the circuit board3. Unplug \"water sen\" connector from the circuit should go ON. If not, replace the circuit board.board. b. Move the ‘‘water’’ switch on the tester to the4. Plug \"water sen\" connector from Scotsman Water position. The No Water light on the boardtester into the circuit board. should go OFF. If not replace the circuit board. If the light does go off, replace the water levelBin Control: sensor. If the Bin Empty light is ON, wait 10-20 seconds for a. Move the ‘‘bin full’’ switch on the tester to Full. the machine to start. The machine should start.The light on the tester should be ON. LIGHT GOES ONIf the light on the tester is not on, the circuit boardshould be replaced. b. If the light on the tester IS on, move the ‘‘binfull’’ switch to Bin Empty. The light on the testershould go OFF, and the Bin Empty light on thecircuit board should go ON. WATER SENS PHOTO TRANS LED LIGHT GOES ONSWITCH TO \"FULL\" SWITCH TO \"NO WATER\" January 1997 Page 24

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