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NME954R & FME1204R - Scotsman Ice Systems

1. Do NOT o K hd gt Condenser Distance and Remote Location Schematic Condenser x Located ABOVE Ice Machine rd x dd A Remote Condenser Located BELOW Ice Machine January 2000 Page 5 NME954R amp FME1204R FOR THE INSTALLER Remote Condenser Location Select the best available location protecting the condenser from extremes of dirt dust and sun Meet all applicable building codes Usually the services of a licensed electrician are required Roof Attachment 1 Install and attach the remote condenser to the roof of the building using the methods and practices of construction that conform to the local building codes including having a roofing contractor secure the condenser to the roof 2 Have an electrician connect the remote condenser fan motor to the ice maker using the junction box at the back of the ice maker PRECHARGED LINE ROUTING Do not connect precharged tubing until all routing and forming of the tubing is complete See the coupling instructions for connecting information 1 Each set of precharged refrigerant lines either 25 foot or 40 foot consists of a 3 8 inch diameter liquid line and a 1 2 inch diameter discharge line Both ends of each line have quick connect couplings one end has a schrader valve connection that end goes to the condenser Note The openings in the building ceiling or wall listed in the next step are the minimum sizes recommende
2. Ice Chute Water Level Sensor Reservoir Cleaning Drain Tube d Evaporator Gear Motor Ice Level Sensor January 2000 Page 15 NME954R amp FME1204R COMPONENT DESCRIPTION Control Box Contactor A definite purpose contactor connecting the compressor and the remote condenser fan motor to the power supply Circuit Board Controlling the ice machine through sensors and relays The sensors are for ice level and water level The relays are for the gear motor with a built in time delay to clear the evaporator of ice when the unit turns off and for the liquid line valve Potential Relay The compressor start relay On Off Mode Switch Manual control for the machine Control Board Water OK Light Power Light Service Light Freeze Light Bin Full Light LED1 Compressor Relay LED3 Auger Relay January 2000 Page 16 ELECTRICAL SEQUENCE There are 7 indicator lights on the control board e WTR OK Water OK Green Normal Glowing Glows when there is water in the reservoir e PWR OK Power OK Green Normal Glowing Glows when the control board has power and is functional e Service Red Normally Off eFreeze Red Normally glowing when making ice e Bin Full Red Normally Off when making ice LED1 White Located next to the board s Compressor Relay Normally Glowing when making ice e LED3 White Located next to the board s Auger Motor Relay Normally Glowin
3. Check that the refrigerant lines are properly installed 5 Check that the electrical power has been on for at least 4 hours and that the compressor dome is warm 6 Check that the unit is installed correctly according to the final check list on page 13 Start Up 1 Go through the pre start inspection 2 Open the hand valve observe that water enters the water reservoir fills the tube from the reservoir to the evaporator and then shuts off Check for leaks 3 Open the King Valve 4 Turn the master switch on The electrical start up sequence is automatic There will be a short 15 second delay before the gear motor starts and the liquid line valve opens After the liquid line valve opens the low pressure control will close and the compressor will start 5 The remote condenser fan turns and the condenser begins to discharge warm air 6 The unit should soon be making ice if desired the low side pressure may be checked it should be 32 psig or 2 psig The discharge pressure will depend upon air and water temperatures but should be between 200 psig and 280 psig 7 THERE ARE NO ADJUSTMENTS TO MAKE so replace the panels 8 Clean and or sanitize the storage bin interior wipe off the exterior with a clean damp cloth 9 Give the owner user the service manual instruct him her in the operation of the unit and make sure they know who to call for service 10 Fill out the warranty registration and mail
4. a vent at the highest point of the drain line and the ideal drain receptacle would be a trapped and vented floor drain Use Connect To only 3 4 rigid tubing Cold Water Storage Bin Install a separate gravity drain to the ice storage bin Insulation of this drain line is recommended Vent Bin Drain 3 4 FPT Floor Drain January 2000 Page 9 NME954R amp FME1204R FOR THE ELECTRICIAN CONFORM TO ALL APPLICABLE CODES Connect the electrical power to the ice machine through the junction box at the back Check the nameplate located on the back panel for the voltage requirements and for the minimum circuit ampacity The machine requires a solid chassis to earth ground wire The ice maker should be connected to its own electrical circuit so it would be individually fused Voltage variation must remain within design limitations even under starting conditions Terminal Strip For Remote Condenser Ice Maker Ground The Chassis Ci Electrically the remote condenser fan motor is connected to the ice maker at the contactor terminals for the compressor and the fan motor operates whenever the compressor operates Electrical connections are made at the junction box at the back of the ice maker and at the junction box on the remote condenser The remote condenser must be wired to the ice maker in accordance with local and national electrical codes with a minimum of 18 Awg w
5. foreign matter remains on them 2 Lubricate the inside of the couplings especially the O Rings with refrigerant oil 3 Position the fittings on the correct connections on the condenser and ice machine Clean and Lubricate Couplings eThe inch discharge line schrader valve end goes to the remote condenser fitting marked discharge line eThe inch liquid line schrader valve end goes to the remote condenser fitting marked liquid line The inch discharge line goes to the ice maker fitting marked discharge line e The inch liquid line goes to the ice maker fitting marked liquid line Final Connections 4a Begin by tightening the couplings together by hand Continue to turn the swivel nuts by hand until is is certain that the threads are properly engaged No Schrader Valve g GON of TO REMOTE TO ICE MAKER CONDENSER Schrader Valve Se 4b Using two wrenches one to rotate the swivel nut and one to hold the tubing tighten each coupling It is CRITICAL that ONLY the NUT on the pre charged tube be turned or the diaphragms will be torn loose by the piercing knives and be loose in the refrigeration system causing severe operational problems Note As the coupling is tightened the diaphragms in the quick connect couplings will begin to be pierced As that happens there will be increased resistance to tightening the swivel nut 4c Continue tightening the swivel nut
6. leveled 5 Is there a minimum of 6 clearance at the rear left and right of the machine for proper service access 6 Is the water pressure a minimum of 20 psig 7 Has the machine been secured to the bin 8 If two units on one condenser has the relay kit been installed 9 Is there a water shut off valve installed near the machine 10 Is the remote condenser installed per local building codes and in a place where it has adequate ventilation and minimal solar heat gain 11 Has all shipping material and literature inside the front panel been removed from the units 12 Have the remote condenser and precharged lines been properly installed 13 Has the electrical connection between the ice maker and the condenser been made 14 Verify that the master switch is in the OFF position 15 Switch on the electrical power NME954R amp FME1204R Final Check List Roof Holes Sealed ee KLE Condenser Secured Fewer Leveled 16 Refer to Pre Start instructions the next page January 2000 Page 13 NME954R amp FME1204R INITIAL START UP Pre Start Inspection 1 Remove the front left and right side service panels 2 Check that any shipping blocks have been removed 3 Inspect the interior of the machine for loose screws or wires Check that no refrigerant lines are rubbing each other Check that the fan blade turns freely remote condenser 4
7. remove auger After the auger has been removed allow the auger to dry if the auger is not bright and shiny it must be cleaned Clean the auger and evaporator as required DO NOT HONE THE EVAPORATOR 7 Replace the water seal 8 Reverse to reassemble Breaker amp Bearing amp Auger Assembly January 2000 Page 24 Allen Screws NME954R amp FME1204R SERVICE DIAGNOSIS No Ice Symptom Possible Cause Probable Correction No ice is made nothing operates Unit off due to no power Restore power Unit off due to master switch in Off position Move master switch to ON Unit off due to low water level in reservoir Check water supply filter and float valve Unit off due to ice level sensors photo electric eyes blocked Check clean ice level sensors Unit off due to scale on water level sensor Clean water level sensor Unit off due to high pressure control open Check for remote condenser fan motor failure or power interruption to the fan motor Auger motor hums but does not turn Auger can t turn Circuit board has not yet shut unit down Unit is shut down Circuit board has shut ice machine down due to high auger motor amp draw Check for cause of high amp draw including bearings gear motor condition and scale on auger amp evaporator Pump down pressure control open very low suction pressure Auger not turning due to motor failu
8. water sensor is plugged in To check the water sensor A Unplug water sensor B Pull water sensor from reservoir C Place one ohmmeter lead on the sensor s plug and the other on the sensor s tip The meter should show nearly zero resistance If it reads infinite resistance check the tip for corrosion If it is clean and still reads open replace the sensor OR connect a copper wire to the wire where the water sensor plugs into and place the other end in the water The water OK light should go ON If it does not replace the control board 3 Ice sensor check Is the Bin Full light Off If it is OFF and the Service light is Off and the unit is not running replace the control board If itis OFF and the auger motor is running but the compressor is not check the compressor contactor coil If it is on the ice sensors may be blocked Remove them and check for mineral scale Scotsman s test box can also be used to determine if the ice sensors or board are defective Using the tester A Disconnect the ice sensors at the connection by the ice chute Connect the LED and PHOTO TRANS wires to the control board s wires B With the On Off mode switch in either position move the Bin Full switch on the tester to Bin Full the tester s light will blink and after a few seconds the bin full light on the control board will come on If not replace the board Move the Bin switch on the tester to Bin Empty The light on the test
9. 4R At the evaporator the refrigerant enters an area of relatively low pressure where it can easily boil off or evaporate As it evaporates it absorbs heat from the evaporator and whatever is in contact with it such as the water inside it After the evaporator the refrigerant now a low pressure vapor goes through the suction line back to compressor where the cycle is repeated System Information 90 F air and 70 F water e Suction pressure 35 PSIG e Discharge pressure 255 PSIG e Minimum Discharge pressure low temp 180 PSIG Compressor Amps e3 Phase 2 8 e Single Phase 4 3 Remote Condenser ee amp Y Detail Of Head Pressure Control Valve Thermostatic Expansion Valve Liquid Line Head Pressure Control Valve Receiver Evaporator Compressor January 2000 Page 19 NME954R amp FME1204R OPERATION Refrigeration Low Condensing Temperature The refrigeration system under low condenser air temperatures is much the same as it is under higher temperatures with the exception that the resulting low head pressures cause the head pressure control to close off the liquid line between the condenser and the receiver This forces more refrigerant into the condenser with a small amount of discharge gas going into the receiver to maintain SCHEMATIC OF DISCHARGE PRESSURE CONTROL VALVE Normal Temperature Valve Disk From Compr
10. CMR230 terminal strip marked TO REMOTE FAN and connect at the remote condenser junction box Possible Location For KCMR230 Control Box 6 Check phasing of the electrical circuit as follows A The phasing of the wiring MUST now be checked as incorrect phasing will result in a failure of the kit relay Below is an illustration of the KCMR230 terminal strip Note that each terminal is marked 1 2 3 4 5 6 For proper phasing t t 4 6 t ttt o clj llellele le a 2 1 S 1O 1S flo 5 ha 2 REMOTE MACH MACH FAN ee Terminals 1 and 3 must be connected to the same side of the line such as L1 iy ETR EAEE 1 2 3 Terminals 2 and 4 must be connected to the same side of the line such as L2 B Make a test with a volt meter as follows 1 Switch on ice maker 1 first then switch on ice maker 2 The compressors must be operating for this test Do this after start up 2 Test with a volt meter between terminals 2 and 4 then between terminals 1 and 3 Compare the readings obtained to the ones in the following list C Test terminals 1 2 Full Voltage 208 230 Test terminals 1 3 No voltage Test terminals 2 3 Full Voltage Test terminals 2 4 No voltage Test terminals 3 4 Full voltage Test terminals 1 4 Full voltage D If there is full voltage where there should be no voltage turn off ice maker 2 both
11. ED DF250 beverage dispensers use KBT46 and KDIL N 250 e Lancer nugget IBD use KDIL N L amp Lancer kit Back View Allow 6 above machine for service 20 84 Drain 3 4 FPT SPECIFICATIONS ICE MAKER Liquid Line Connection Discharge Line Connection Remote Condenser Junction Box Electrical Inlet i Water Inlet 3 8 Flare Model Number Dimensions Basic Electrical Ice Type Cond Type Minimum Maximum Refrigerant w o bin Circuit Fuse Size Charge H x W x D Ampacity R 404A FME1204RS 32A 27 x 21 x 24 208 230 60 1 FLAKE Remote Air 14 1 20 208 ounces FME1204RS 3A _ same 203 230 60 1 FLAKE Remote Air 11 2 15 208 ounces NME954RS 32A _ same 208 230 60 1 NUGGET Remote Air 14 1 20 208 ounces NME954RS 3A _ same 208 230 60 3 NUGGET Remote Air 11 2 15 208 ounces Minimum Circuit Ampacity is used to determine wire size and type per National Electric Code January 2005 Page 2 NME954R amp FME1204R REMOTE CONDENSER SPECIFICATIONS Model Use with Basic Electrical ERC151 32 1 FME1204R or 1 NME954R 208 230 60 1 ERC302 32 1 or 2 FME1204Rs or NME954Rs SAME 2 00 5 08 i ERC DIMENSIONS A B F G s017 33 34 10 16 94 11 rt Liquid Line Discharge Line 38 Quick Connect Fitting 50 Quic
12. G Moving Parts Hazard Rotating parts can cause personal injury Disconnect electrical power before beginning 2 The auger and breaker bearing may now be removed as an assembly a Unscrew 4 shart i allen head cap Assembly screws holding breaker to evaporator b Lift up on breaker and remove auger from evaporator Note If the auger is stuck the breaker must be removed from the The breaker may be removed from the auger and evaporator without disturbing the auger a Unscrew breaker cover from breaker left hand threads b Unscrew auger stud from top of auger c Unscrew 4 allen head cap screws holding breaker to evaporator d Lift up on breaker to remove from auger If the auger is stuck Use a slide hammer type puller to pull on the auger at the threaded hole The size of that hole is 5 8 18 Inspect the auger the critical areas of the auger are a The auger body It should be clean and shining Sometimes an auger will appear clean when wet but after it is dry it will be seen to be stained Scrub the auger with ice machine cleaner and hot water Ice machine cleaner is an acid Handle it with extreme care keep out of the reach of children b The water seal area Because the auger has been removed the water seal will have to be replaced Remove the water seal top half from the auger and inspect the auger for minerals clean as required Slide Ham
13. NME954R amp FME1204R INTRODUCTION To the owner or user The service manual you are The ice machines covered in this manual are a reading is intended to provide you and the remote condenser type modular ice system that fits maintenance or service technician with the a variety of Scotsman storage bins They feature information needed to install start up clean front service for the freezer gear motor control maintain and service this ice system box water reservoir and bin control an electronic circuit for monitoring ice and water level a thermostatic expansion valve and R 404A as the refrigerant Table of Contents Parts Lists and Wiring Diagrams are located in the center of this manual This Manual Was Printed On Recycled Paper January 2000 Page 1 NME954R amp FME1204R FOR THE INSTALLER Either the FME1204R or the NME954R is designed to fit the following Scotsman storage bins e SB480 and extensions with bin top KBT18 e BH800 using bin top KBT15 one unit or KBT25 two units e BH801 using bin top KBT28 e BH900 with KBT24 one unit BH900 with KBT25 two units side by side NME954 Dispenser Applications The NME954 can be placed on and used with certain ice and ice beverage dispensers Kits are required for proper operation e D150 use adapter KBT42 and KNUGDIV e D200 or ID250 use adapter KBT46 and KDIL N ID2 e Cornelius ED DF200 beverage dispensers use KBT46 and KDIL N 200 e Cornelius
14. ap to 8 12 ft Ib P a ACCESS ey wee VALVE te oe Torque Cap to 7 12 ft Ib Front Seated King Valve Charging Service Port Cylinder January 2000 Page 34
15. ce chute then take out all four allen head cap screws and pull the breaker off the auger and evaporator If the bearing only needs grease inject grease into the bearing using Scotsman grease needle pn 02 3559 01 and Scotsman bearing grease cartridge pn A36808 001 Be sure to inject grease evenly and thoroughly Needle January 2000 Page 23 NME954R amp FME1204R Auger Maintenance In some areas the water supply to the ice maker will have a great deal of minerals in it and that will result in an evaporator and auger becoming coated with these minerals requiring a more frequent removal than twice per year If in doubt about the condition of the evaporator and auger the auger can be removed so the parts can be inspected Note Water filters can filter out suspended solids but not dissolved solids Soft water may not be the complete answer Check with a water treatment specialist regarding water treatment For more information on removal and replacement of these parts see REMOVAL AND REPLACEMENT AWARNING Moving parts hazard Moving parts can cause personal injury Disconnect power before beginning to service components 1 To remove the auger remove the front and top panels 2 Push back bail clamp holding ice chute cover to ice chute and remove cover 3 Unscrew and remove ice sweep 4 Rremove ice chute from evaporator 5 Remove 4 allen screws holding breaker to evaporator 6 Pull up to
16. crews holding breaker to evaporator d Lift up and remove breaker bearing assembly from auger amp evaporator 6 Service the bearing Check for rust rough spots and damage a The bearing is pressed into the breaker to remove the bearing and replace it an arbor press is needed b Replace lower seals before installing new bearing in breaker Note seals must be pressed in with a tool Such as 2 PCV coupling pushing against the outer edge only they will not install by hand Replace parts as required Re grease bearing with Scotsman part no A36808 001 bearing grease Replace top seal and check the o rings replace if cut or torn 7 Reverse to reassemble specific tools and materials are required to install properly 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 Note Flaker Components Shown Nugget Similar but Without Slotted Collar Step 5 a Step 5 b Ice Sweep Step 5 c and Step 6 Slotted Collar f AA Auger Allen Screws January 2000 Page 29 NME954R amp FME1204R REMOVAL AND REPLACEMENT Auger To Remove the Auger Turn off the water to the machine and unclip the evaporator drain hose pull it down and drain the evaporator into the bin or a container 1 Remove the top panel AWARNIN
17. d for passing the refrigerant lines through 2 Have the roofing contractor cut a minimum hole for the refrigerant lines of 1 3 4 inch Check local codes a separate hole may be required for the electrical power to the condenser DO NOT KINK OR CRIMP REFRIGERANT TUBING WHEN INSTALLING IT 3 Route the refrigerant lines through the roof opening Follow straight line routing whenever possible Any excess tubing MUST be retained within the building 4 Spiral the excess length of pre charged tubing inside the building Use a horizontal spiral as illustrated to avoid any traps in the lines 5 Have the roofing contractor seal the holes in the roof per local codes Note Precharged tubing contains a R 404A holding charge The entire refrigerant charge required for the system is contained in the ice machine Tubing illustration shows tight spiral a spiral in the field depends on tubing limitations Tight spiral not required REMOTE CONDENSER Spiral Excess Tubing Inside l V4 Building Remote Condenser Above Ice Maker January 2000 Page 6 NME954R amp FME1204R FOR THE INSTALLER Coupling Instructions Note The couplings on the sets of precharged lines must be installed properly to prevent leaking Carefully follow the instructions Initial Connections 1 Remove the protector caps and plugs Wipe the seats and threaded surfaces with a clean cloth to be certain that no
18. e Be sure to allow a 6 minimum space above the top of the machine for service January 2000 Page 4 Remote Condenser Location Use the following for planning the placement of the condenser relative to the ice machine Location Limits condenser location must not exceed ANY of the following limits e Maximum rise from the ice machine to the condenser is 35 physical feet e Maximum drop from the ice machine to the condenser is 15 physical feet e Physical line set maximum length is 100 feet e Calculated line set length maximum is 150 Calculation Formula e Drop dd x 6 6 dd distance in feet Rise rd x 1 7 rd distance in feet e Horizontal Run hd x 1 hd distance in feet Calculation Drop s Rise s Horizontal Run dd rd hd Calculated Line Length Configurations that do NOT meet these requirements must receive prior written authorization from Scotsman NME954R amp FME1204R e Route a line set that rises then falls then rises e Route a line set that falls then rises then falls Calculation Example 1 The condenser is to be located 5 feet below the ice machine and then 20 feet away horizontally 5 feet x 6 6 33 33 20 53 This location would be acceptable Calculation Example 2 The condenser is to be located 35 feet above and then 100 feet away horizontally 35 x 1 7 59 5 59 5 100 159 5 159 5 is greater than the 150 maximum and is NOT acceptable
19. e bolts to 110 inch pounds 2 Lower the auger into the evaporator barrel slightly turning it to match up with the drive end Do Not Drop Into the Evaporator 3 Complete the reassembly by reversing the disassembly for the breaker amp thrust bearing assembly January 2000 Page 32 NME954R amp FME1204R REMOVAL AND REPLACEMENT Gear Motor Assembly To Check the Motor AWARNING Electrical Shock Hazard Disconnect electrical power before beginning 1 Remove wires from terminals 1 and 2 2 Use an ohmmeter to check for continuity and grounds If there is continuity but the motor will not start check the motor s start switch 3 Remove the motor end bell or motor stator With the ohmmeter wires attached to 1 and 2 move the centrifugal switch actuator up and down to simulate motor speed If the ohmmeter does not show any change or shows and open circuit replace the switch or motor To Remove and Repair the Gear motor Assembly Assuming that the procedures through removal of the water seal have been performed Water 1 Remove the electrical wires Shed from the gear drive motor 2 Unscrew the 4 cap screws holding the gear motor to the unit 3 Remove the gear motor from Cover and the ice maker Output Gear To Inspect the gear motor Assemdly A Remove the cap screws holding the gear motor case halves together and pry the two cases apart B To lift off the cover lift up until you can feel in
20. er will go out and after a few seconds the Bin Full light on the board will go out If master switch is ON the unit should start 4 High pressure cut out check Disconnect electrical power Pull the wires off the high pressure cut out Use an ohmmeter to determine if the switch is OPEN If it is check the discharge pressure If the discharge pressure is less than 300 PSIG replace the high pressure cut out If the high pressure cut out is open and the system has high discharge pressure check for the cause 5 Low pressure cut out check Disconnect electrical power Pull the wires off the low pressure cut out Use an ohmmeter to determine if the switch is OPEN If it is check the suction pressure If the suction pressure is greater than 20 PSIG replace the low pressure cut out If the low pressure cut out is open and the system has low suction pressure check for the cause January 2000 Page 27 NME954R amp FME1204R REMOVAL AND REPLACEMENT Water Reservoir amp Bin Controls WATER RESERVOIR 1 Shut off the water supply to the ice maker 2 Remove front panel and reservoir cover 3 To remove float only disconnect water inlet compression fitting at reservoir inlet 4 Push in the tab behind the reservoir and pull the valve assembly up and out of the reservoir tank 5 To remove reservoir remove drain hose from reservoir 6 Remove evaporator inlet hose from reservoir 7 Remove mounting screws from reser
21. essor To Receiver From Condenser pressure until the head pressure is built back up to the rated gauge pressure of 180 psig At that pressure the valve opens up the liquid line from the condenser to the receiver SCHEMATIC OF DISCHARGE PRESSURE CONTROL VALVE Low Temperature TEA From Compressor To Receiver From Condenser PUMP DOWN During the pump down cycle usually initiated by the circuit board de energizing the liquid line valve the discharge gases flow through their normal path to the remote condenser through the head pressure control and into the receiver At this point the refrigerant flow is stopped by the closed liquid line valve This action forces the refrigerant into the receiver and keeps it out of the compressor The pump down continues until the low pressure control turns the compressor off January 2000 Page 20 MAINTENANCE AND CLEANING NME954R amp FME1204R It is the USER S RESPONSIBILITY to keep the ice machine and ice storage bin in a sanitary condition Without human intervention sanitation will not be maintained Ice machines also require occasional cleaning of their water systems with a specifically designed chemical That chemical dissolves mineral build up that forms during the ice making process Sanitize the ice storage bin as frequently as local health cods require and every time the ice machine is cleaned and sanit
22. g when making ice If the machine is switched off at the mode switch but is otherwise ready to go switching the mode switch to ON does the following e The PWR OK light glows e f there is water in the reservoir the WTR OK light glows e After 10 seconds the Freeze LED1 and LED3 lights glow and the machine starts up Start Up e The compressor relay and auger motor relay become energized connecting power to the windings of the auger motor and liquid line valve coil The liquid line valve opens refrigerant flows to the expansion valve e The pump down pressure switch closes connecting power to the contactor coil e The contactor is energized connecting power to the compressor and the compressor starts e As ice is made it passes between the ice level sensors but because it is not a continuous stream it only interupts the sensor s infrared beam momentarily The bin full light remains off and the machine stays on until ice builds up in the bin and blocks the path between the sensors for 6 seconds or longer When that occurs the bin full light glows and the machine shuts down NME954R amp FME1204R Shut Down e The compressor relay opens LED1 goes out e The liquid line valve closes stopping refrigerant flow e The pump down control opens after the suction pressure falls to its cut out point e The compressor contactor opens eThe compressor stops e The auger motor stays on for 1 more minute cleari
23. he reservoir as in step 6 wash and rinse the water reservoir 12 Go thru steps 13 19 to sanitize the ice machine water system 13 Mix two gallons of sanitizer solution Use an approved sanitizer A possible sanitizer solution may be obtained by mixing two gallons of warm 90 115 F potable water with 1 ounce of household bleach 14 Slowly pout the sanitizer solution into the water reservoir until the float rises then switch the master switch ON 15 As the ice machine uses water from the reservoir continue to pour the sanitizer solution into the reservoir 16 After of the sanitizer solution has been added to the reservoir and the reservoir is nearly empty switch the master switch OFF 17 Drain the reservoir and thoroughly wash the interior of the reservoir and cover with sanitizer solution Be sure the drain hose is upright and capped 18 Remove the block from the float in the water reservoir 19 Switch the master switch to ON 20 Continue ice making for at least 15 minutes to flush out any cleaning solution DO NOT USE any ice produced from the cleaning solution Be sure no ice remains in the bin 21 Remove all ice from the storage bin 22 Add warm water to the ice storage bin and thoroughly wash and rinse all surfaces within the bin 23 Sanitize the bin interior by washing the interior of the bin with the balance of the sanitizer solution 24 Switch the master switch ON 25 Return all
24. ire with an ground bonding wire connected to the ground screws provided in both the condenser and machine field wiring boxes All outdoor wiring must be in rain proof conduit All external wiring must conform to national state and local electrical codes The use of a licensed electrician is required to perform the electrical installation Rain Proof Conduit January 2000 Page 10 NME954R amp FME1204R FOR THE ELECTRICIAN Fan Relay Kit WARNING Do all wiring with the electrical power disconnected ___ 2 2 To install the KCMR230 fan relay kit when using 2 230 VOLT ice makers and one 230 volt two circuit remote condenser ERC302 See the remote condenser nameplate for current requirements to determine wire size to be used for electrical hookup Refer to wiring diagram All external wiring should conform to the national state and local electrical codes Usually an electrical permit and services of a licensed electrician will be required 1 Mount the control box in a convenient location 2 Attach a solid earth ground wire to the ground screw 3 Route connecting wires from the first ice maker junction box marked condenser fan and connect it to the KCMR230 terminal strip marked NO 1 ICE MACHINE 4 Route connecting wires from the second machine junction box marked condenser fan and connect it to the KCMR230 terminal strip marked NO 2 ICE MACHINE 5 Route connecting wires from K
25. it to the Scotsman Factory January 2000 Page 14 COMPONENT DESCRIPTION Control Box Contains the electrical controls that operate the machine High Pressure Cut Out A manual reset switch sensing the high side refrigeration pressure It is set to shut the machine off at 400 psig Pump Down Control An automatic reset pressure switch connected to the low side of the refrigeration system Controls the compressor Evaporator A vertical stainless steel tube refrigerated and water filled In it there is a stainless steel auger Reservoir Float operated it maintains the water level in the evaporator at a constant level it also contains the water level sensor Control Box High Pressure Cut Out Pump Down Pressure Switch Compressor NME954R amp FME1204R Water Level Sensor Senses if there is water in the reservoir to make ice out of Will shut the machine off it there is none Ice Discharge Chute Directs the ice produced by the evaporator into the storage bin Ice Level Sensor An electronic eye it senses the presence of ice in the bottom of the ice discharge chute Operates to turn the ice machine on and off automatically as the level of ice in the bin changes Gear Motor An oil filled speed reduction gearbox driving the auger Cleaning Drain Tube When uncapped and lowered drains the evaporator Expansion valve The refrigerant metering device Expansion Valve
26. ized The ice machine s water system should be cleaned and santized a minimum of twice per ICE MAKING SYSTEM In place cleaning 1 Check and clean any water treatment devices if any are installed 2 Remove screws and front and top panels 3 Move the ON OFF switch to OFF 4 Remove all the ice from the storage bin 5 Remove the cover to the water reservoir and block the float up 6 Drain the water reservoir and freezer assembly using the drain tube attached to the freezer water inlet Return the drain tube to its normal upright position and replace the end cap 7 Prepare the cleaning solution Mix eight ounces of Scotsman Ice Machine Cleaner with three quarts of hot water The solution should be between 90 and 115 degrees F Scotsman Ice Machine Cleaner contains acids These compounds may cause burns If swallowed DO NOT induce vomiting Give large amounts of of water or milk Call Physician immediately In case of external contact flush with water Keep out of the reach of children 8 Slowly pour the cleaning solution into the water reservoir until it is full Wait 15 minutes then switch the master switch to ON 9 As the ice maker begins to use water from the reservoir continue to add more cleaning solution to maintain a full reservoir 10 After all of the cleaning solution has been added to the reservoir and the reservoir is nearly empty switch the master switch to OFF 11 After draining t
27. k Connect Fitting 95 1 27 A B p23 y 2 75 m Air Discharge ft j L ESA ZA E A A 5 i Wi 14 53 9 b A g E A v Air Intake T Adjustable ai Clearance 12 00 18 00 24 00 o F R i 30 48 45 72 60 95 i ar 2 07 J La w ae Lee ee PERG Other Required Items RTE25 Precharged line set 25 R 404A or RTE40 Precharged line set 40 R 404A MODEL ALIMEER SEALAL MUMBER AC SUPPLY SOL ADS ICE MAKER NAMEPLATE I AMIEINA ERG AAP Ae AURERE LOCATED ON BACK PANEL MAMIMUM PUDE SE ed ATATEN WATTE FHABE ACPARORANT ihin CHARGE oe SERIAL PLATE LOCATED hen oe WDLTE MLAILA WNAHP LIA BEHIND FRONT PANEL DAPRE RRA DAN UTHER Pros PRE Low ice SCOTSsS MoON FAIRFAX OSA TION PIMP AS FOUTH CAMOLINA U E A January 2000 Page 3 NME954R amp FME1204R FOR THE INSTALLER Installation Limitations The machine and bin are designed to be installed indoors in a controlled environment Min Max Air Temperature 50 F 100 F Not including the remote condenser Water Temperature 40 100 F Water Pressure PSI 20 80 Voltage 198 253 Compared to the nameplate Operating the machine outside of the limitations is misuse and can void the warranty Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance They meet or exceed the standards of UL NSF and CUL Scotsman assumes no liability or responsibility of any kind for products manufactured b
28. mer Puller Pa Removing Auger Drive Slide Up Against Stop To Loosen Auger January 2000 Page 30 NME954R amp FME1204R REMOVAL AND REPLACEMENT Water Seal To Remove the Water Seal Assuming all steps to remove the auger have been performed 1 The gear motor evaporator assembly will have to be pulled away from the machine if not yet done 2 Remove the 4 hex head cap screws holding the evaporator to the gear motor assembly Lift the evaporator up and off of the gear motor 3 Remove the snap ring or wire retainer from the grove under the water seal Water Seal Retaining Ring WATER SEAL 4 Pull or drive out the lower half of the water seal REMOVAL OF THE To Replace the Water Seal 1 Lubricate the water seal with water and push the water seal into the bottom of the evaporator slightly past the grove for the retaining ring 2 Replace the retaining ring and pull the water seal down against it 3 The part of the water seal that rotates with the auger must also be replaced Remove the old part from the auger and clean the mounting area 4 Place a small bead of food grade silastic sealant such as 732 RTV or Scotsman part number 19 0529 01 on the area of the auger where the water seal is to be mounted 5 Carefully push the water seal rubber side against the auger shoulder and the silastic Place A Bead Of Food Grade Sealant Here 6 Allo
29. ng out ice in the evaporator and then e The auger motor relay opens LED3 goes out and the auger motor stops The liquid line valve will not reopen until 2 minutes or more have passed after the last shut down If the path between the ice level sensors remains clear for more than 10 seconds the ice machine will restart Control Board Protection Devices e When the water level in the reservoir falls below the water level sensor s tip the WTR OK light goes out and the machine shuts down When water refills the reservoir the WTR OK light glows and the machine starts up again e f the auger drive motor current becomes excessive the liquid line valve and auger drive motor will be switched Off and the Service light will blink The control board will restart the auger drive motor in 4 minutes If during the first 60 seconds after restart the auger motor current stays within limits the liquid line valve is reopened and the machine returns to normal operation If the auger motor s current is excessive within 60 seconds after the restart the process will be repeated once more If during that try the current is still excessive the machine shuts down and must be manually reset The service light will then be glowing continuously To Reset Switch the power to the machine OFF and then ON Other Protection Devices elf the high pressure cut out switch opens the machine will stop immediately It will automatically reset when the pres
30. panels to their original positions January 2000 Page 21 NME954R amp FME1204R Sensor Maintenance 1 The bin control uses devices that sense light 2 The ice machine senses water level by a probe therefore they must be kept clean enough so that located in the water reservoir At least twice a they can see At least twice a year remove the year the probe should be removed from the bin control sensors from the base of the ice chute reservoir and the tip wiped clean of mineral and wipe the inside clean as illustrated build up Ice Chute Ice Level bs Sensors Slide Left To Remove Clean the Probe s Tip with ice machine cleaner and a clean soft cloth 3 Clean the remote condenser Use a vacuum cleaner or coil cleaner if needed Do NOT use a wire brush 4 Check and tighten all bolts and screws January 2000 Page 22 Bearing Maintenance The top bearing in the breaker should be checked e unscrewing the auger stud at least two times per year Check the breaker bearing by removing the ice chute cover Chute Cover Ice Sweep Breaker Cover e unscrewing the breaker cover left hand thread NME954R amp FME1204R Auger Stud Cap Screw Inspect the bearing There should be plenty of grease in sight If grease is needed the bearing and breaker should be removed to check the action of the bearing It should rotate smoothly To remove the breaker remove the lower i
31. rage bin drain restricted Clean out drain Tubing cracked Replace tubing Condensation on drain tubing Insulate tubing Hose off Re attach hose Reservoir cover off Return cover to reservoir Reservoir cracked Replace reservoir Evaporator water seal leaks Check base of evaporator amp drip pan If the seal leaks shut off the wter remove the auger replace the water seal Check gear motor for water infiltration Excessive ice meltage Bin drain clogged Clean out bin drain Poor fit between bin door and door frame Adjust or replace Machine makes too much noise Evaporator coated internally with minerals Clean with Scotsman Ice Machine Cleaner Motor bearings dry Oil or replace motor January 2000 Page 26 NME954R amp FME1204R CONTROL SYSTEM DIAGNOSTICS The control system consists of e Control Board e Water Sensor elce Sensors e High Pressure Cut Out elow Pressure Cut Out If the unit is OFF check the control board 1 Is the Power OK light on If not check power to the unit If it has power and the Power OK light is NOT on check the high pressure and low pressure cut outs If they are both closed replace the board If the Power OK light is ON go to the next step 2 Is the Water OK light on If it is go to the next step If not check the water level in the reservoir If there is water in the reservoir check that the
32. rant and polyolester oil Do NOT use mineral oil in this refrigeration system R 404A is a Near Azeotrope so liquid charging is required e When the system is serviced a special liquid line drier is required It is included with replacement compressors R 404A is not compatible with mineral oil so these ice machines use Polyolester oil Polyolester oil absorbs water very easily When one of these refrigeration systems is opened for service it must be re sealed as soon as possible 15 minutes maximum e Special leak detection equipment is required to locate small refrigerant leaks Usually a leak detector capable of detecting a Halongenated refrigerant or HFC 134a will work Check with the leak detector manufacturer if in doubt Access Valves To use the access valves e Remove the cap from the stem use a 3 16 allen wrench to check that the valve is CLOSED The remove the core cap Close the valve and replace the caps when the job is finished The valve must be closed and the caps must be on or the valve will leak Charging Procedures e Extra care must be taken when recharging this remote system No liquid refrigerant may be placed in the system at the compressor DO NOT use the access valves at the front of the unit for weighing in the charge All liquid refrigerant must be weighed into the receiver through the front seated king valve Receiver ALLEN WRENCH Torque Stem to 6 8 ft Ib Torque C
33. re auger relay failure on circuit board or gears stripped Check drive train Liquid line valve not opening due to coil failure or failure of compressor relay on circuit board TXV restricted or not metering Check bulb temperature Lack of refrigerant Check for a leak No power to circuit board Check harness Low or high pressure controls open Circuit board gear motor relay will not close Check replace board Water level or ice level sensor failed Check replace sensor No ice auger motor is turning Compressor contactor coil is open Check replace contactor Compressor will not start Check start capacitor Check start relay Check compressor windings Circuit board relay will not close Check replace board Pump down pressure switch contacts do not close liquid line valve open and suction pressure high Check pump down switch contacts January 2000 Page 25 NME954R amp FME1204R SERVICE DIAGNOSIS Low Capacity Symptom Possible Cause Probable Correction Unit makes ice but very slowly High discharge pressure because of a dirty condenser coil Clean the condenser Auger and evaporator are coated with mineral scale Clean the water system Low refrigerant charge Locate leak Recover refrigerant repair leak replace dryer evacuate and weigh in the nameplate charge Water leak Ice sto
34. sure falls below its cut in point e The mode on off switch is the manual control for the complete machine but it is nota service disconnect e but it is not a service disconnect January 2000 Page 17 NME954R amp FME1204R OPERATION Water Water enters the machine through the 3 8 male flare at the rear of the cabinet goes to the water reservoir which it enters through the float valve The water them goes out the bottom of the reservoir tank to the bottom of the evaporator Reservoir overflow or evaporator condensation is routed to the drain Reservoir Drain Tube Water Level Watere Inlet Drain Water Schematic January 2000 Page 18 OPERATION Refrigeration Beginning at the compressor the refrigerant is compressed into a high temperature gas The discharge line directs this gas to the condenser At the remote condenser the gas is cooled by air and it then condenses into a liquid This high pressure liquid then goes through the liquid line to the head pressure control valve into the receiver through the liquid line valve and then through the expansion valve The thermostatic expansion valve meters liquid refrigerant into the evaporator the volume of liquid refrigerant depending upon the temperature of the evaporator warmer evaporators get more refrigerant and colder evaporators get less Refrigeration Schematic Liquid Line CARPERE errar NME954R amp FME120
35. switches Then turn off ice maker 1 both switches The connections at the KCMR230 terminal strip marked ice maker 1 must be reversed put the wire that was on 1 on 2 and the wire that was on 2 on 1 WARNING Do all wiring with the electrical power disconnected January 2000 Page 11 NME954R amp FME1204R FOR THE INSTALLER Completed Installation A typical installation should generally appear as illustrated below The best place for the remote condenser is above the ice machine although other locations are permisable Roof B E Insulated Precharged Refrigerant Tubing MODEL NUMBER SIRIAL Niimi M AC SUPPLY VOLTAGE MINIMUM CIAGU AMPACITY WIRES MAXIMAL FUSE BiZi r HERATI HEATEA WATTE PHASE AEP RIDEMANT ai CMA PORE oF MOTORS VOLTE ALAIFLA WIHP LAA COMP AP Ron Fan OP Ww OTHER DESIGN Pe Le LOMAS HIH Eai E bore PE fe iT SP orree E H TOFAGE EA BCOTSMAN FAIRFAM OPERATION PAINPAR ROUTH CAROLINA iS A January 2000 Page 12 FOR THE INSTALLER 1 Is the ice system installed indoors in a location where the air and water temperatures are controlled and where they do not exceed the design limitations 2 Is there an electrical service disconnect within sight of the installed machine Has the voltage been checked and compared to nameplate requirements 3 Have all the plumbing connections been made and checked for leaks 4 Has the machine and bin been
36. ternal contact then pull the cover towards the output gear end and then lift the cover with drive motor attached up and away from the gear motor case Note The case cover output gear bearings and shaft are one pressed together assembly Replace as a unit C Inspect the oil gears and bearings If the oil level and condition is acceptable quickly check the gears and bearings They are likely to be fine if the oil is If there is evidence of water in the oil rusty bearings and gears the oil having a creamy white appearance oil level too high carefully inspect the bearings and gears If in doubt about the condition of a part replace it The oil quantity is 14 fluid ounces do not overfill Note The gears and bearings are available only as pressed together sets D After replacing parts as required if any reassemble the gearcase The two smaller gears and the oil should be in the lower case the output gear will be with the cover As you lower the cover onto the lower case cover will have to be moved closer to the second gear after the output gear has cleared the second gear top bearing E After the case is together and the locating pins are secure in both ends replace all cap screws 4 Bench test the gear motor check for oil leaks noise and amp draw Centrifugal Switch Rotor Bearing January 2000 Page 33 NME954R amp FME1204R Refrigeration Service This ice machine uses R 404A refrige
37. until it bottoms out or a very definate increase in resistance is felt no threads should be showing Do NOT overtighten 5 Using a marker or pen mark a line lengthwise from the coupling union nut to the bulkhead Then tighten the coupling and additional 1 4 turn As the nut turns the line will show when 1 4 turn is made 6 After all connections are made and after the king valve has been opened do not open at this time check the couplings for leaks j Rotate Swivel Nut 14 Turn More January 2000 Page 7 NME954R amp FME1204R FOR THE INSTALLER Location TWO UNITS ON ONE CONDENSER REMOTE CONDENSER ROOF CUTAWAY EXCESS So senvice X ACCESS BUILDING X ICE MAKERS SERVICE ACCESS SIDE AND BACK WALL CUTAWAY Da January 2000 Page 8 NME954R amp FME1204R FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet Connect a cold potable water supply W Inl T A i aR i to the ice machine Use 3 8 O D copper tubing and connect it to the 3 8 male flare at the back of the cabinet Field Supplied Install a hand valve near the machine Water Filter to control the water supply Drains Hand Shut Off Valve Ventice The cabinet has a FPT drain Maker connection The drain is at the back of Drain 3 4 the cabinet the drain line is of the FPT gravity type and 1 4 inch per foot fall is an acceptable pitch for the drain tubing There should be
38. voir Water Sensor bracket and remove reservoir from ice maker Float 8 Reverse to reassemble Assembl Ice Chute Slide Bin Controls to Locking Remove Tabs BIN CONTROLS Ice Level Sensors 1 Disconnect electrical power 2 Remove front panel 3 Remove control box cover 4 Locate ice chute at the base of the chute in front of and behind it are two plastic bin control mounts 5 Slide each bin control to the left and in the control box disconnect the electrical leads connecting the bin control to the circuit board 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 ice chute January 2000 Page 28 NME954R amp FME1204R REMOVAL AND REPLACEMENT Bearing and Breaker Note Removal of the auger water seal evaporator and gear motor must begin at the top of the assembly To Remove the Breaker Bearing Assembly AWARNING Moving Parts Hazard Disconnect electrical power before beginning 1 Remove panels and disconnect electrical power 2 Push back bail clamp and remove ice chute cover 3 Unscrew and remove ice sweep 4 Lift up and remove ice chute 5 The breaker may be removed from the auger and evaporator without disturbing the auger a Unscrew the breaker cover from breaker left hand threads b Unscrew auger stud from top of auger c Unscrew 4 allen head cap s
39. w the auger and seal to air dry until the silastic is dry on the surface 7 lf the original water seal was leaking it would be a good idea to inspect the interior of the gear motor January 2000 Page 31 NME954R amp FME1204R REMOVAL AND REPLACEMENT Evaporator To Replace the Evaporator Assuming all the steps for removal of the thrust bearing breaker auger and water seal have been performed 1 Discharge the refrigerant from the ice maker 2 Unsweat the refrigerant connections a At the thermostatic expansion valve outlet Heat sink the TXV body when unsweating or resweating the adjacent tubing b At the suction line at the joint about 3 from the evaporator 3 Remove the evaporator 4 Unsweat the drier from the liquid line 5 After installing a new water seal in the new evaporator see To Replace the Water Seal resweat the tubing connections 6 Install an new drier in the liquid line 7 Evacuate the system until dehydrated then weigh in the nameplate charge Check for leaks 8 Install auger breaker breaker bearing assembly and ice discharge chute in reverse order of disassembly See To Reassemble Evaporator and Auger To Reassemble the Evaporator and Auger 1 After the gear motor has been inspected fasten the evaporator to the gear motor be sure that the number of shims indicated on the gear case cover is in place between the gearcase cover and the drip pan gasket Torque th
40. y Scotsman that have been altered in any way including the use of any part 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 design are subject to change without notice Location Install the machine in a location where it has enough space around it to be accessible for service usually a minimum of 6 inches Try to avoid hot dirty and crowded locations Be sure that the location for the machine is within the limitations Storage Bin Tip the storage bin on its back using parts of the carton to protect the exterior finish Install the legs into the threaded holes in the bottom of the bin Turn the leg levelers all the way in preparation for leveling later Return the bin to the upright position remove paper covering the bin gasket Install the bin top according to the directions with the bin top Note Do not push bin into position instead lift it there Pushing a bin especially one with ice in it can cause damage to the legs and the leg mounts Ice Maker The machine is heavy so the use of a mechanical lift is recommended for lifting the machine high enough to install on top of the bin After the unit is placed on the bin line it up so it is even with the back side Secure the machine to the bin with the hardware provided with the machine Remove the front panel and remove any shipping blocks Not

NME954R & FME1204R - Scotsman Ice Systems

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NME954R &amp; FME1204R - Scotsman Ice Systems

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NME954R & FME1204R - Scotsman Ice Systems