Ventura - FMENME8.CHP - Scotsman Ice Systems
Contents
1. b Move the water switch on the tester to the Water position The No Water light on the board should go OFF If not replace the circuit board If the light does go off replace the water level sensor If the Bin Empty light is ON wait 10 20 seconds for the machine to start The machine should start February 1997 Page 322. Inspect the gearmotor A Remove the cap screws holding the gearmotor case halves together and pry the two cases apart B To lift off the cover lift up until you can feel internal 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 gearcase cover output gear bearings and output shaft are a 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 GEAR CASE oil level too high carefully inspect the bearings and gears If in doubt about the condition Bench test the gearmotor check for oil leaks of a part replace it The oil quantity is 14 fluid noise and amp draw ounces do not overfill ROTOR BEARING fe i r ot SEAL February 1997 Page 29 NME650 amp FME800 REFRIGERATION SERVICE R 404A THIS ICE MACHINE USES R 404A HP62 Pressure Temperature Chart for HP62 REFRIGERANT AND POLYOLESTER VAPOR VAPOR COMPRESSOR OIL TEMP PRESSURE TEMP PRESSURE DO NOT USE MINERAL OIL IN THIS DEGF PSIG DEG F PSIG REFRIGERATION SYSTEM COD ess mate 17 7o sd 146 e R 404A is a Near Azeotrope and therefore S8 ee goa 18 72 eee 150 liquid cha
3. pushed up the evaporator the auger is thrust down and pressure from the auger thrust is taken up by this bearing ICE SWEEP BEARING BREAKER DIVIDER AUGER EVAPORATOR MOTOR February 1997 Page 12 ELECTRICAL SEQUENCE Refer the wiring diagram as needed If the machine is switched off at the master switch but is otherwise ready to go switching the master switch to on does the following eThe bin empty light on the circuit board goes on eThere is a 15 second delay e f there is enough water in the reservoir the circuit board will allow the machine to start up Start up consists of eThe compressor relay and auger motor relay become energized connecting power to the windings of the auger motor eThe auger motor starts and the centrifugal switch closes connecting power to the compressor contactor coil eThe contactor is energized connecting power to the compressor and the compressor starts 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 NME650 amp FME800 Shut Down consists of eThe compressor relay opens The compressor contactor opens The compressor stops The auger motor is run by the circuit board for 2 more minutes clearing out ice in the evaporator and then The auger
4. recommendations 1 Check with a water treatment specialist for a water test and recommendations regarding filters and treatment 2 In most cases the water used to make ice should be filtered or treated depending upon the water There is no one type of water filter that is effective in all situations That is why a water test is important Note 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 by 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 February 1997 Page 4 NME650 amp FME800 FOR THE INSTALLER Location DO NOT STACK ANYTHING IN TWO UNITS ON ONE BIN FRONT OF THE MACHINE S ALLOW ROOM FOR AIR CIRCULATION AND SERVICE ACCESS February 1997 Page 5 NME650 amp FME800 FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet Air Cooled Models The recommended water supply is clean cold water Use 3 8 O D copper tubing connect to the 3 8 male flare at the back of the cabinet Install a hand valve near the machine to control the water supply Water Treatme
5. required All kits legs and information required for the specific job REMOTE LIQUID INLET Installation Limitations KLE CARLIN This ice system is designed to be installed indoors Pr ONLY in a controlled environment REMOTE DISCHARGE HTLITL MALE COUPLING 2in 1 3t Min Max eaten EU 0 0 WATER COOLED NL REMOTE CONDENSER Air Temperature oor 1 00 F i egies Water Temperature 40 F 100 F REMOTE ONLY Water Pressure 20 PSI 80 PSI Voltage for 115v model 104 126 Compared to the nameplate Operating the machine outside of the limitations is 52 9cm misuse and can void the warranty ELECTRICAL INLET 4 50in 4cn WATER INLET 3 8in Ocn FLARE 12 43in 31 6cm 3 00in 13 3cm The normal finish for the ice machine is enamel oe A stainless steel panel kit SPKFM21 may be field eee OBAIN 3 installed to convert the unit to a stainless steel WATER COOLED ONLY 2 BBin finish ud DRAIN SPECIFICATIONS ICE MAKER iu 26 len Model Number Dimensions Basic lce Type Condenser Minimum Max Refrigerant Electrical Type Circuit Ampacity Fuse Size Charge FME800AE 1A 27 x 21 x 24 115 60 1_ Flake Air 19 5 30 24 ounces FME800WE 1A same same same Water 18 3 30 20 ounces FME800AE 6B_ same 230 50 1__ same Air 24 ounces FME800WE 6B same same same Water 20 ounces NME650AE 1A_ same 115 60 1_ Nugget Air 19 5 30 24 ounces NME650WE 1A same s
6. reverse order of disassembly See To Reassemble Evaporator and Auger To Reassemble the Evaporator and Auger 1 After the gearmotor 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 the 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 ICE SWEEP EVAPORATOR poses BREAKER NME Components Shown FME similar February 1997 Page 28 o rv l NME650 amp FME800 REMOVAL AND REPLACEMENT Gearmotor A WARNING Note The gears and bearings are available only as pressed together sets Electrical Shock Hazard Electrical shock can cause personal injury Disconnect electrical power before beginning Assembly Assuming that the procedures through removal of the water seal have been performed 1 Remove the electrical wires from the drive motor 2 Unscrew the 4 cap screws holding th gearmotor to the base of the machine To Remove and Repair the Gearmotc m WATER SHED COVER amp 3 Remove the gearmotor from the OUTPUT GEAR m icemaker ASSEMBLY Bench test the gearmotor check for oil leaks noise and amp draw To
7. 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 ICE CHUTE RESERVOIR 1 Shut off water supply 2 Remove front panel 3 Remove reservoir cover 4 Disconnect water inlet tube from reservoir inlet fitting 5 To remove float valve push in on Locking Tab Plunger amp as shown and pull valve up Float Valve _ Valve Seat Note The plunger seat is available as a separate TEE C i part 6 To remove reservoir pull up and remove water sensor 7 Disconnect water outlet tubes Es 8 Remove the two screws holding reservoir to bracket ee 9 Remove reservoir from ice machine 10 Reverse steps 1 9 to reassemble February 1997 Page 24 NME650 amp FME800 HEMOVAL AND REPLACEMENT Bearing And Breaker AWARNING Hazardous Moving Parts Moving auger can cause personal injury Disconnect electrical power before beginning Note Removal of the auger water seal evaporator and gearmotor must begin at the top of the assembly To Remove the Breaker Bearing Assembly 1 Remove panels and disconnect electrical power 2 Pull the bail clamp off of the chute cover Unscrew three studs and remove ice chute cover 3 Unscrew and remove ice sweep 4 Remove insulation halves f
8. NME650 amp FME800 INTRODUCTION To the owner or user The service manual you are It features front service for the freezer gearmotor reading is intended to provide you and the control box water reservoir and bin control an maintenance or service technician with the electronic circuit for monitoring ice and water level information needed to install start up clean a thermostatic expansion valve and HP62 as the maintain and service this ice system refrigerant This is a modular ice system that fits a variety of Scotsman ice storage bins Table of Contents Parts lists and wiring diagrams are in the center of this manual printed on yellow paper This manual was printed on recycled paper Keep this manual for future reference Note this symbol when it appears AWARNING It is an alert for important safety information on a potential hazard February 1997 Page 1 NME650 amp FME800 FOR THE INSTALLER These machines fit the following Scotsman products check sales literature for other possible USENET combinations UTILITY CONNECTIONS B90 and extensions with bin top KBT18 TI HTB555 or BH550 using bin top KBT14 or KBT20 BH800 using bin top KBT15 one unit BH800 two units no bin top required BH900 using bin top KBT24 PLAN VIEW When installing a new system check to be sure that you have everything you need before beginning Correct Bin Correct Ice Machine FRONT Correct Bin Top if
9. PLIED FILTER February 1997 Page 6 FOR THE ELECTRICIAN NME650 amp FME800 CONFORM TO ALL APPLICABLE CODES The electrical power to the unit is supplied through the junction box at the rear of the machine 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 WATER COOLED 9d AIR COOLED j Nn at February 1997 n TE M 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 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 POWER SUPPLY k Hx Jj Page 7 NME650 amp FME800 FOR THE INSTALLER Final Check List 1 Is the ice system installed indoors in a location 5 Is there a minimum of 6 clearance at the back where the air and water temperatures are of the machine for proper service access and air controlled and where they do not exceed the circulation design limitations 6 Is the water pressure a minimum of 20 psig 2 Is there an electrical service disconnect within sight of the installed machine Has the voltage 7 Has the machine been secured to the bin been ch
10. 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 check the circuit board 1 Unplug the water sen connector from the circuit board 2 Plug water sen connector from the Scotsman Electronic Control tester into the circuit board a Move the water switch on the tester to no water and the no water light on the circuit board should go on If not replace the board b Move the water switch to the water position the no water light should go off and after 15 seconds the machine should start if not replace the circuit board If the machine works with the tester and not by itself replace the water level sensor MORE INFORMATION ON THE TESTER CAN BE FOUND AT THE END OF THE MANUAL Check the gearmotor relay on the circuit board If the bin empty light is on and the water level light is off there should be power after 15 seconds at the com terminal of the gearmotor relay if not replace the circuit board February 1997 Page 21 NME650 amp FME800 SERVICE DIAGNOSIS Condition No Ice Produced STATUS GEARMOTOR OPERATES COMPRESSOR DOES NOT A Check the compressor relay The relay is on the circuit
11. aintains the water level in the evaporator at a constant level it also contains the water level sensor Water Level Sensor Senses if there is water in the reservoir to make ice out of Will shut the machine off it there is no water AIR COOLED CONTROL BOX G D RESERVOIR CONDENSER EXPANSION ada ICE LEVEL COMPRESSOR SENSORS 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 Condenser Air or water cooled where the heat removed in ice making is discharged Expansion valve The refrigerant metering device WATER COOLED CONTROL BOX CONDENSER EXPANSION VALVE RESERVOIR PRESSURE CUT OUT February 1997 Page 10 NME650 amp FME800 COMPONENT DESCRIPTION Control Box Contactor A definite purpose contactor The loads include connecting the compressor to the power supply Compressor contactor Circuit Board eFan motor The circuit board receives input signals from several sensors and translates them to control the electrical power supply to the various load
12. al injury Disconnect electrical power before beginning 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 The top panel must be removed 2 Remove bail clip and remove ice chute cover 3 Unscrew ice sweep 4 Remove ice chute body 5 The auger and breaker bearing may now be removed as an assembly a Unscrew 4 allen head cap 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 auger 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 BREAKER HAND AUGER ASSEMBLY FME Components Shown NME similar c Unscrew 4 allen head cap screws holding breaker to evaporator d Lift up amp remove breaker from evaporator e 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 1 The auger bogy 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 JUHIN IS RNN GTI TM Ice machine cleaner
13. ame same Water 18 3 30 20 ounces NME650AE 6B same 230 5071 same Air 24 ounces NME650WE 6B same same same Water 20 ounces Note Minimum Circuit Ampacity is used to determine wire size and type per national electric code February 1997 Page 2 NME650 amp FME800 SAMPLE BIN AND MACHINE COMBINATIONS CHARGE DESIGN PRESSURE Low OF HACR TYPE CIRCUIT BREAKER Om E W Nee The Nameplate is located on the back of the machine FME800 ON BH550 NME650 ON BH800 FME800 ON BH900 Bin Top Kit Required February 1997 Page 3 NME650 amp FME800 FOR THE INSTALLER Location After uncrating and inspection the unit is ready for installation It is important that the machine be installed in a location where it has enough space around it to be accessible for service and a minimum of 6 be allowed at the back for air circulation on air cooled models Try to avoid hot dirty and crowded locations Be sure that the location for the machine is within the environmental 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 Note Do not push bin into position but lift it there Pushing a bin esp
14. ant may contain non condensable gases purge evacuate and recharge per nameplate B Check the evaporator 1 Clean the evaporator the mineral build up will adversely affect the ice machines production 2 Check the evaporator for water leaks replace the water seal if found to be leaking 3 Check the low side pressure normal is about 32 34 psig If low assume a refrigerant leak locate repair and recharge If no leak the TXV may be restricted defective or not adjusted properly If needed replace the TXV evacuate and recharge per nameplate 4 Check the insulation on the evaporator It should be dry with no wet spots or frost If the insulation has failed replace the evaporator or add extra insulation in the form of foam tape to the evaporator C Check the compressor 1 The compressor may be inefficient a Check the amp draw if low change the compressor b if the amp draw is normal pinch off the suction line to check the pull down capability of the compressor The compressor should pull down to 25 inches of vacuum and hold there for three to five minutes February 1997 Page 23 NME650 amp FME800 REMOVAL AND REPLACEMENT Bin Controls BIN CONTROLS Ice Level Sensors 1 Disconnect electrical power 2 Remove front panel 3 Remove control box cover SLIDE BIN 4 Locate ice chute at the base of the chute in CONTROLS IN front of and behind it are two plastic bin control AND OUT mounts 5 Slide each bin control
15. art 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 on the master switch on and all reset switches reset 1 Unplug photo trans and LED connectors from the circuit board 2 Plug photo trans and LED connectors from the tester into the circuit board 3 Unplug water sen connector from control board 4 Plug water sen connector from Scotsman tester into circuit board PHOTO TRANS LIGHT GOES ON SWITCH TO FULL Bin Control a Move the bin full switch on the tester to Full The light on the tester should be ON If the light on the tester is not on the circuit board should be replaced b If the light on the tester IS on move the bin full switch to Bin Empty The light on the tester should go OFF and the Bin Empty light on the circuit board should go ON If the Bin Empty light is ON wait 10 20 seconds for the machine to start if the machine starts replace the ice level sensors If the Bin Empty light does not come ON the circuit board should be replaced Water Level a Move water switch on tester to No Water position The No Water light on the circuit board should go ON If not replace the circuit board LIGHT ON WATER SENS ES Pd aw SWITCH TO NO WATER
16. back to compressor where the cycle is repeated Refrigeration Schematic Y CONDENSER LIQUID SUCTION LINE LINE i pM DISCHARGE LINE EVAPORATOR AC FAN B MOTOR FEEE MAA TOE Ee EET ELLE L TTL G d Ln p HT IEEE dais OPERATION Performance Typical Low Side Pressure Air Cooled 34 38 PSIG Water Cooled 32 PSIG Typical Discharge Pressure Air Cooled 220 300 PSIG e Water Cooled 245 PSIG Typical Compressor Amp Draw e 8 9 Typical Gearmotor Amp Draw 3 1 t0 3 5 Superheat e 5 7 degrees High Pressure Cut Out e 450 PSIG EXPANSION VALVE COMPRESSOR Low Pressure Cut Out 0 4PSIG Fan Motor Watts e 35 Watt Refrigerant Charge Air Cooled 24 ounces HP62 Water Cooled 20 ounces of HP62 February 1997 Page 15 NME650 amp FME800 CLEANING amp SANITIZING A Scotsman Ice System represents a sizable investment of time and money in any company s business In order to receive the best return for that investment it MUST receive periodic maintenance It is the USER S RESPONSIBILITY to see that the unit is properly maintained It is always preferable and less costly in the long run to avoid possible down time by keeping it clean adjusting it as needed and by replacing worn parts before they can cause failure The following is a list of recommended maintenance that will help keep
17. board if it does not supply power to the contactor coil the compressor will not run 1 Check for power at the contactor coil if none a Check for power at the compressor relay at the circuit board If there is power at the relay but none at the contactor coil Check for an open wire between the relay and the contactor 2 Check the contactor coil If the coil is open replace the contactor 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 compressor relay on the circuit board has power on the NO contact but not on the COM contact replace the circuit board B Check the compressor 1 Check the compressor start relay 2 Check the start capacitor 3 Check the windings of the compressor for open windings or shorts to ground Replace those items found defective February 1997 Page 22 NME650 amp FME800 SERVICE DIAGNOSIS Condition Low Ice Production STATUS EVERYTHING IS OPERATING A Check the air cooled condenser for dirt Clean as required Check the head pressure on water cooled Adjust as required If the head pressure is very high 1 Air cooled Check for high air temperatures or restrictive air flow Correct as needed 2 Water cooled Check for high water temperatures or low water pressure Correct as needed 3 The refriger
18. e reservoir 1 Restore adjust water level See the next step February 1997 Page 20 NME650 amp FME800 SERVICE DIAGNOSIS Condition No Ice Being Produced STATUS NOTHING OPERATES G Check The gear motor the motor must turn at full speed or the compressor contactor will not pull in If the motor will not turn fast enough check the auger and evaporator for scale build up If no power to the motor Check The indicator lights on the circuit board the bin empty light should be ON the no water light should 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 be at line voltage 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 the instructions at the end of the manual If the machine operates with the tester and not by itself the ice level sensors should be replaced 3 If the transformer is fine and the no water light is ON check the water level sensor
19. ecially one with ice in it can cause damage to the legs and the leg mounts Install the appropriate bin top on the bin according to the instructions for the bin top 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 Note When placing 2 of these machines on a BH800 without the bin top removal of the 2 service panels facing each other will make future service easier 1 Remove the 2 top panel screws that will face each other 2 Remove the 2 service panels that will face each other 3 Add a strip of gasket such as Scotsman part number 19 0503 04 to the 2 base edges that will face each other and around service panel space on the 2 panels that will face each other When the 2 machines are placed on the bin the gaskets will seal the bin top area and the space between the machines Water Limitations An ice machine is a food manufacturing plant it takes a raw material water and transforms it into a food product ice The purity of the water is very important in obtaining pure ice and in maximizing product life This section is not intended as a complete resource for water related questions but it does offer these general
20. ecked and compared to nameplate i 2 requirements 8 Is there clearance over the top of the machine for service access 3 Have all the plumbing connections been made 2 and checked for leaks 9 Is there a water shut off valve installed near the machine 4 Has the machine and bin been leveled 10 Have all of the shipping blocks been removed February 1997 Page 8 START UP NME650 amp FME800 Pre Start Inspection 1 Remove the front and side service panels 2 Check that the styrofoam 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 air cooled 4 Check that the unit is installed correctly according to the final check list page 8 Start Up 1 Go through the prestart 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 Switch the master switch on The electrical start up sequence is now on automatic A There should be a short 15 second delay before the gearmotor starts B After the gearmotor starts the compressor will start 4 On air cooled models the condenser will begin to discharge warm air on water cooled models the water regulating valve will open and warm water will be discharged into the drain 5 The uni
21. ect electrical power and remove the filter The filter may be cleaned or replaced B Clean the condenser the condenser may appear to be clean on the surface but it can still be clogged internally Check with a flash light from the front to see if light can be seen though the condenser fins Reverse to reassemble Step 3 Clean the condens r Step 1 Remove the top panel February 1997 Page 18 NME650 amp FME800 MAINTENANCE AND CLEANING Auger AWARNING Hazardous Moving Parts Moving auger can cause personal injury Disconnect electrical power before beginning In some areas the water supply to the ice maker will contain a high concentration of minerals 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 of these parts see REMOVAL AND REPLACEMENT 1 To remove the auger remove the front and top panels 2 Push bail clamp back from the top of the chute cover Bail Clamp Assembled chute and Evaporator 3 Unscrew and remove ice sweep 4 Remove 4 a
22. ervoir At least twice a year the probe should be removed from the reservoir and the tip wiped clean of mineral build up ICE LEVEL SENSORS SLIDE TO REMOVE CLEAN THE N LIGHT SENSORS 3 The bearing in the breaker should also be checked at least two times per year A Check the bearing by e switching the machine OFF removing the ice chute cover eunscrewing the ice sweep eremoving the water shed eunscrewing the breaker cover eunscrewing the auger stud Inspect the assembly looking for wear See Removal and Replacement to replace bearing or seals Reverse to reassemble FME Components Shown NME similar NME650 amp FME800 4 Check and tighten all bolts and screws PULL UP TO REMOVE PROBE a We CLEAN THE WATER LEVEL PROBE EE CAUTION THE TIP IS MADE OF GLASS MATT ICE SWEEP AWARNING Moving Parts Hazard Rotating parts can cause personal injury Disconnect electrical power before beginning BREAKER COVER February 1997 Page 17 NME650 amp FME800 MAINTENANCE Air Cooled AWARNING Moving fan blade can cause personal injury Disconnect electrical power before beginning 5 Clean the air cooled condenser BY The air flow on this model is from front to back so UDN the inside of the machine will have to be available NET to clean the air cooled condenser Use a vacuum S cleaner or coil cleaner if needed Do NOT use a S P wire brush JS A Disconn
23. is an acid Handle it with extreme care keep out of the reach of children AIME 2 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 HAMMER PULLER THREAD INTO THE AUGER HERE February 1997 Page 26 NME650 amp FME800 REMOVAL AND REPLACEMENT Water Seal To Remove the Water Seal Assuming all steps to remove the auger have been performed 1 The gearmotor evaporator assembly will have to be exposed 2 Remove the 4 hex head cap screws holding the evaporator to the gearmotor assembly Lift the evaporator up and off of the gearmotor 3 Remove the snap ring or wire retainer from the grove under the water seal 4 Pull or drive out the lower half of the water seal REMOVAL OF THE WATER SEAL ATER SEAL RETAINING 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 snap ring 2 Replace the snap 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 wa
24. job is finished The valve must be closed and 36 78 126 333 the caps must be on or the valve will leak Bits rs 81 dide 2 342 40 35 s 85 T90 iuris 351 PN PENNE 88 132 360 BA E 91 134 370 46 rh 95 T9623 ums 379 48 99 138 389 50 102 140 399 52 odo 106 142 409 bAq oh tt tos 110 144 420 e ou ux 114 146 430 58 118 148 441 60 123 150 452 O2 uA 127 152 e 7 o4 aos 464 64 vs 132 154 475 66 136 156 487 68 141 158 499 February 1997 Page 30 REFRIGERATION SERVICE General Information Work on the refrigeration system should only be done when it is certain that the system needs repair eRefrain from checking refrigeration pressures without reason Visual inspection of the water system observation of the ice formation amp draw voltage and other techniques will lead to proper diagnosis Scotsman also recommends that at the time of initial start up gauges not be used e f gauges must be used don t always check the high side pressure If the condenser is clean and seems to be operating correctly it most likely is The low side pressure is more important on an ice machine than the high side f gauges must be used use very short hoses to minimize refrigerant discharged into the air e Refrigerant should not be added except as a way to determine the proper operation of the product If the system was low on ref
25. llen screws holding breaker to evaporator 5 Pull up to remove auger FME Components Shown NME similar 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 Tu ALLEN 8 Reverse to reassemble SCREWS BREAKER amp BEARING amp AUGER ASSEMBLY i Chute Cover NME Components Shown FME similar Breaker Cover February 1997 Page 19 NME650 amp FME800 SERVICE DIAGNOSIS Condition No Ice Being Produced STATUS NOTHING OPERATES A 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 reset switches high and low pressure depress and release each switch If the still does not start check the high and low side pressures D Check the low pressure cut out if closed go to E if open it could be due to ow refrigerant charge The auger not turning eRestricted system eTXV not opening 1 Check the low side pressure the low pressure cut out opens at pressure below 4 psig If open reset and a Check if the auger is turning if it is not remove the gearbox and Check for internal damage repair and replace in the machine b Check for low charge add some refrigerant if the unit will operate normal low side pressure being about 32 34 psig s
26. motor relay opens and the auger motor stops If the ice level sensor is clear bin empty for more than 15 seconds the machine will start up again Another purpose of the circuit board is to turn the machine off if there is not enough water in the machine When the water level in the reservoir falls below the water level sensor the machine will shut down e When the water refills the reservoir the machine will start up again Separate from the circuit board e f the high pressure control cut out switch opens the machine will stop immediately through the relays on the circuit board It must be manually reset at the control e f the low pressure control cut out switch opens the machine will stop immediately through the relays on the circuit board It must be manually reset at the control The master switch is the manual control for the complete machine but it is not a service disconnect February 1997 Page 13 NME650 amp FME800 OPERATION Water Water enters the machine through the 3 8 male flare at the rear of the cabinet goes to a strainer and then to the water reservoir which it enters through the float valve The water then goes out the bottom of the reservoir tank to the bottom of the evaporator Water Level The correct water level should be checked when the machine is making ice Check the water level in the reservoir and compare it to the horizontal line molded into the side of the reservoi
27. nt In most areas a water filter of some type will be useful In areas where the water is highly concentrated with minerals the water should be tested by a water treatment specialist and the recommendations of the specialist regarding filtration and or treatment should be followed Water Cooled Models A separate 3 8 O D copper line is recommended with a separate hand valve to control it It is connected to a 3 8 FPT condenser inlet at the back of the cabinet The water pressure to all lines must always be above 20 psig and below 80 psig WATER za COOLED b Q CONDENSER amp ee INLET Ye A SA HAND p dn vate Pa WATER CONDENSER VENTED FILTER DRAIN DRAIN Drains Air Cooled Models There is one 3 4 FPT drain at the back of the cabinet the drain line is of the gravity type and 1 4 inch per foot fall is an acceptable pitch for the drain tubing There should be a vent at the highest point of the drain line and the ideal drain receptacle would be a trapped and vented floor drain Use only 3 4 rigid tubing Water Cooled Models In addition to the above mentioned drain a separate condenser drain must be installed Connect it to the 1 2 condenser drain connection at the back of the cabinet Storage Bin A separate gravity type drain needs to be run similar to the air cooled drain Insulation of this drain line is recommended AIR COOLED MODELS HAND VALVE VENTED DRAIN FIELD WATER INLET SUP
28. o the reservoir and the reservoir is nearly empty switch the master switch to OFF 11 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 Wash and rinse the water reservoir Sanitizing To sanitize use an approved sanitizing solution or mix one ounce of household bleach to 2 gallons of warm 95 F 115 F water Repeat steps 8 11 using the sanitizer solution in place of the cleaning solution 12 Remove the block from the float in the water reservoir 13 Switch the master switch to ON 14 Continue ice making for at least 15 minutes to flush out any cleaning solution IML DO NOT USE any ice produced from the cleaning solution Be sure no ice remains in the bin IMT 15 Remove all ice from the storage bin 16 Add warm water to the ice storage bin and thoroughly wash and rinse all surfaces within the bin 17 Sanitize the bin interior with an approved sanitizer using the directions for that sanitizer 18 Replace the panels February 1997 Page 16 MAINTENANCE AND CLEANING 1 The bin control uses devices that sense light therefore they must be kept clean enough so that they can see At least twice a year remove the bin control sensors from the base of the ice chute and wipe the inside clean as illustrated 2 The ice machine senses water level by a probe located in the water res
29. r The correct level should be between 14 above and V4 below the line If needed bend the float arm up or down to adjust the water level EVAPORATOR DRAIN RESERVOIR STRAINER Reservoir overflow or evaporator condensation is routed to the drain Water cooled models have a separate water circuit for the cooling water it enters the fitting at the rear goes to the water regulating valve then to the water cooled condenser and down the drain WATER LEVEL EVAPORATOR E WATER SCHEMATIC February 1997 Page 14 OPERATION Refrigeration NME650 amp FME800 Beginning at the compressor the refrigerant is compressed into a high temperature gas The discharge line directs this gas to the condenser At the condenser air or water cooled the gas is cooled by either air or water and it then condenses into a liquid This high pressure liquid then goes through the liquid line to 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 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
30. rging is required VBS hos an 20 TA 4s 155 Sub rcv 21 VB Zakcts 161 eWhen the system is serviced a special liquid line dryer is required E 2E gt f Tm ies Polyolester oil absorbs water very easily and E EXEAT 26 Bo S Us therefore when the system is opened for PONE 2 REP M i service it must be re sealed as soon as AMORE i SERERE bum possible 15 minutes maximum 3 CL m eM ies eSpecial leak detection equipment is required to DENN 33 T CENA 2nd locate small refrigerant leaks Usually a leak OPER 35 CEPR o detector capable of detecting a Halogenated MERO 37 po ce Se refrigerant or HFC 134A will work Check with Bee wed 39 S RR Ts the leak detector manufacturer if in doubt e p ER EM a As with any other refrigerant do NOT mix HP62 TIN 43 ds 305 with pressurized air when leak testing PNE 46 ME ae e Evacuate to 300 microns TERMS 48 UP rr DAC Recover reclaim or recycle refrigerant The 18 50 106 253 method chosen is up to the service company Any 18 53 108 260 refrigerant placed into a Scotsman ice machine 20 55 10 e Bed must meet ARI spec 700 88 Reclaim programs gt DES 58 pe te ai are available through most refrigerant wholesalers BAe 56 ER x Access Valves To use the access valves 2 Remove the cap from the stem use a 3 16 allen 2g wrench to check that the valve is CLOSED The 30 x e pe removethecorecap 2 a dci vue vm 72 122 p 316 Close the valve and replace the caps when the 34 75 124 324
31. rigerant there is a leak and it must be found and repaired eThis system has a critical charge it must be recharged with the correct amount of refrigerant as listed on the nameplate of the ice machine or performance will suffer e Anytime the refrigeration system has been opened the dryer should be replaced Note Only a HFC type dryer should be used e When brazing the tubing connections to components such as the TXV the component must be protected by heat sink material Torque Stem to NME650 amp FME800 Recover reclaim or recycle refrigerant The method chosen is up to the service company Any refrigerant placed into a Scotsman ice machine must meet ARI spec 700 88 Reclaim programs are available through most refrigerant wholesalers Access Valves To use the access valves 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 6 8 ft Ib Torque Core Cap to Torque Stem Cap to 7 12 ft Ib Access Valves Note There are no valve cores in this valve February 1997 Page 31 NME650 amp FME800 CIRCUIT BOARD TESTING AWARNING Electrical Shock Hazard Electrical shock can cause personal injury Disconnect electrical power before connecting tester INSTRUCTIONS FOR USING TESTER Optional order p
32. rom outside of ice chute lift up and remove ice chute See page 19 5 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 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 pushing against the outer edge only they will not install by hand Replace parts as required Re grease bearing with Scotsman part no A29123 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 FME Components Shown NME similar Step 5 a Step 5 b BREAKER Step 5 c and Step 6 February 1997 Page 25 NME650 amp FME800 REMOVAL AND REPLACEMENT Auger AWARNING Hazardous Moving Parts Moving auger can cause person
33. s The sensors include Auger drive motor Low Pressure Cut Out Switch A manual reset control that shuts off the ice machine when the low side pressure drops below eElectric eyes to check the ice level in the bin a preset point 0 4 psig A thermistor to check the water level in the Potential Relay The compressor start relay reservoir On Off Switch Manual control for the machine Amp draw of the gearmotor ON OFF SWITCH LOW PRESSURE CUT OUT SWITCH POTENTIAL RELAY CONTACTOR TRANSFORMER No Water Light Glows When Water Reservoir is Dry CIRCUIT BOARD Bin Empty Light Glows When Ice Level Is Below Electric Eyes February 1997 Page 11 NME650 amp FME800 COMPONENT DESCRIPTION Evaporator A refrigerated vertical tube filled with water and containing a water seal and auger Auger A solid stainless steel double spiral auger it pushes the ice crystals up to the top of the evaporator Water Seal A two part face seal the top half rotating with the auger the bottom half stationary the sealing action being where the two seal faces meet WATER SEAL Ice Sweep A plastic cap with fingers It revolves with the auger to sweep the ice into the ice chute Breaker Where the ice is compressed and much of the extra water is squeezed out of it before it is discharged into the bin Motor A motor that drives the gear reducer Thrust Bearing As the ice is
34. t should soon be making ice if desired the low side pressure can be checked it should be 34 psig or 4 psig The suction line temperature at the compressor is normally very cold nearly to the point of frost up to the compressor body but not on it The air cooled discharge pressure will depend upon air and water temperatures but should be between 220 psig and 300 psig The water cooled discharge pressure should be constant at about 245 psig The above numbers are for new clean machines you can expect to see some values higher and some lower between different units 6 THERE ARE NO ADJUSTMENTS TO MAKE so replace the panels 7 Clean and or sanitize the storage bin interior wipe off the exterior with a clean damp cloth 8 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 9 Fill out the manufacturers registration card and mail it to the Scotsman Factory 10 Fill out the field quality audit form and mail it to the Scotsman factory February 1997 Page 9 NME650 amp FME800 COMPONENT DESCRIPTION Control Box Contains the electrical controls that operate the machine High Pressure Cut Out Switch A manual reset switch sensing the high side refrigeration pressure It is set to shut the machine off if the discharge pressure should ever exceed 450 psig Compressor The refrigerant vapor pump Reservoir Float operated it m
35. ter seal is to be mounted REPLACING THE WATER SEAL PLACE FOOD GRADE SEALANT e HERE 5 Carefully push the water seal rubber side against the auger shoulder and the silastic BIMBI CAO T ONT T II Do not get any silastic onto the face of the seal WII TT 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 February 1997 Page 27 NME650 amp FME800 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 Recover the refrigerant from the ice maker 2 Unsweat the refrigerant connections a At the thermostatic expansion valve outlet MM CAUTION Heat sink the TXV body when unsweating or resweating the adjacent tubing IL 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 sweat in the new evaporator at the old 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 ICE CHUTE 8 Install auger breaker breaker bearing assembly and ice discharge chute in
36. the machine running with a minimum of problems Maintenance and Cleaning should be scheduled at a minimum of twice per year Note Electrical power will be ON when doing in place cleaning ICE MAKING SYSTEM In place cleaning 1 Check and clean any water treatment devices if any are installed 2 Remove screws and the 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 water should be between 90 115 degrees F Scotsman Ice Machine Cleaner contains acids These compounds may cause burns If swallowed DO NOT induce vomiting Give large amounts of water or milk Call Physician immediately In case of external contact flush with water KEEP OUT OF THE REACH OF CHILDREN AWARNING 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 t
37. top and look for a leak repair replace the drier evacuate and weigh in the nameplate charge If with added charge the unit does not operate Check for a restricted system replace the drier evacuate and weigh in a nameplate charge Check for a Thermostatic Expansion Valve that does not open if defective replace it Replace the drier evacuate and weigh in the nameplate charge E Check the high pressure cut out if closed go to F if open check 1 The pressure control opens at 450 psig Check the high side pressure reset the control and observe on water cooled that water soon begins to flow from the condenser drain or on air cooled that the fan is forcing air through the condenser If the unit trips out on pressures below 450 psig replace the control If the pressures rise above the trip out point and the unit shuts down a Check for adequate water flow on water cooled if adequate clean the interior of the condenser If the pressures are still too high replace the water regulating valve b Check for adequate air flow on air cooled Clean the condenser and if used the filter If the air flow is poor because of the installation advise the user that the unit should be moved or the air around it kept cooler Check the fan motor for tight bearings and proper rotation Check that the fan blades are clean and the fan secure to the fan motor shaft F Check the water level in the reservoir The machine must have enough water in th
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