FME2404 - Scotsman Ice Systems
Contents
1. January 2000 Page 7 NME1854 amp FME2404 FOR THE INSTALLER Final Check List 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 leveled 5 Is there a minimum of 6 clearance at the back of the machine for proper service access and air circulation 6 Is the water pressure a minimum of 20 psig T Has the machine been secured to the bin 8 Is there clearance above the top of the machine for service access 9 s there a water shut off valve installed near the machine 10 Have all of the shipping blocks been removed January 2000 Page 8 START UP NME1854 amp FME2404 Pre Start Inspection 1 Remove the front and side service panels 2 Check that any shipping blocks have been remov2. Model Series Dimensions Basic Ice Condenser Minimum Max Refrigerant w o Bin Electrical Type Type Circuit Fuse Charge W x D xH Ampacity Size R 404A FME2404AS 32 AorB 142 x 24 x 27 208 320 60 1 Flake Air 21 0 25 30 oz FME2404WS 32 JA 42 x 24 x 27 208 320 60 1 Flake Water 19 8 25 24 Oz FME2404WS 32 B same 208 230 60 1 Flake Water 19 8 25 22 OZ FME2404AS 3 AorB 142 x 24 x 27 208 230 60 3 Flake Air 15 9 20 30 oz FME2404WS 3 A 42 x 24 x 27 208 230 60 3 Flake Water 14 6 20 24 oz FME2404WS 3 B same 208 230 60 3 Flake Water 14 6 20 24 OZ NME1854AS 32 AorB 42 x24 x27 208 230 60 1 Nugget Air 21 0 25 30 oz NME1854WS 32 A 42 x 24 x 27 208 230 60 1 Nugget Water 24 oz NME1854WS 32 B same 208 230 60 1 Nugget Water 22 OZ NME1854AS 3 AorB 142 x 24 x 27 208 230 60 3 Nugget Air 15 9 20 30 oz NME1854WS 3 A 42 x 24 x 27 208 230 60 3 Nugget Water 14 6 20 24 Oz NME1854WS 3 B same 208 230 60 3 Nugget Water 14 6 20 22 OZ Per system Always go by the nameplate Minimum circuit ampacity is used to determine wire size and type per the National Electric Code June 2002 Page 2 NME1854 amp FME2404 FOR THE INSTALLER Environmental Limitations Installation Limitations This ice system is designed to be installed indoors in a controlled environment Min Max 50 F 100 F Water Temperature 40 F 100 F Water Pressure 20 PSI 80 PSI Voltage 198 VAC 253 VAC Compared to the nameplate Ope
3. BEARING MAINTENANCE Check each top evaporator bearing at least two times per year A Check the bearing by eremoving the ice chute cover Chute Cover Ice Sweep eremoving the water shed amp unscrewing the breaker cover NME1854 amp FME2404 eunscrewing the auger stud 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 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 Grease Needle part number 02 3559 01 See Removal and Replacement section to replace bearing or seals Reverse to reassemble January 2000 Page 19 NME1854 amp FME2404 AIR COOLED CONDENSER MAINTENANCE Clean or replace the air filters regularly LOCATING x Li PINS 73 me id s s m fer P a bn 3 l g ids Au 4 1 Bes An AE x sd NIE MA a e y ori 1 R sd MU Bw i i L a n LON aa a I RS fA fr 4 LETS P 1 NET LEADS SU Le fy i a MUT e M m F f ii
4. 2 Place a drum of R 404A onto an electronic scale 3 Attach the charging hose to the drum 4 Open the valve on the drum and purge the charging hose 5 Zero out the scale 6 Shut the low side access valve at the ice machine 7 Open the discharge manifold valve full open 8 Watch the scale when the correct charge is shown shut the manifold valve Note If all of the charge will not go in the discharge side A Shut the discharge access valve at the ice machine B Switch the machine on C Open the low side access valve at the ice machine D Open the low side manifold valve and observe the sight glass to be certain that only gas is flowing into the system E When the proper charge is indicated on the scale shut off the manifold valve s 9 Shut off the valve on the refrigerant drum 10 Re open the manifold valves until all liquid has flowed out of the hoses 11 Shut the low side access valve on the ice machine 12 Remove hoses from ice machine and replace all caps January 2000 Page 32
5. NME1854 amp FME2404 REFRIGERATION SERVICE General This ice machine uses R 404A refrigerant and polyolester oil Do NOT use mineral oil in this refrigeration system e Vhen the system is serviced a special liquid line drier is required It is included with replacement compressors e R 404A is not compatible with mineral oil so these ice machines use Polyolester oil Polyolester oil absorbs water very easily A system opened for service 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 eEvacuate to 300 microns e iquid charge the system 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 e Close the valve and replace the caps when done The valve must the caps Hose Connection Schematic for Liquid Charging Instructions for Liquid Charging R 404A In preparation for charging the low side hose should have a sight glass and or a restricting device such as a Charge Faster installed in it for metering liquid into the low side of the system 1 After a thorough evacuation shut off the manifold valves and switch off the vacuum pump
6. evaporator at the old tubing connections 6 Install an new drier in the liquid line T Evacuate the system until dehydrated 300 microns 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 ICE CHUTE NME1854 amp FME2404 Evaporator To Reassemble the Evaporator and Auger 1 After the gear motor has been inspected fasten the evaporator to the gear motor 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 FME Evaporator Shown NME Similar ICE SWEEP January 2000 Page 29 NME1854 amp FME2404 REMOVAL AND REPLACEMENT Gearmotor WARNING Electrical Shock Hazard Disconnect electrical power before beginning CENTRIFUGAL SSE wa SWITCH AUGER DRIVE MOTOR SEAL COVER amp OUTPUT GEAR ASSEMBLY ROTOR BEARING To Remove and Repair the Gearmotor Assembly Assuming that the procedures through removal of the water seal have been performed 1 Remove the electrical wires from the gear drive motor 2 Unscrew the 4 cap screws holding the gear motor to the base of the machine 3 Remove the gear motor from the ice machine Bench test the gear m
7. description applies to each of the two separate ice making systems Beginning at the compressor refrigerant is At the evaporator the refrigerant enters an area of compressed into a high temperature gas The relatively low pressure where it can easily boil off discharge line directs this gas to the condenser At or evaporate As it evaporates it absorbs heat from the condenser air or water cooled the gas is cooled the evaporator and whatever is in contact with it by either air or water and it then condenses into a such as the water inside it After the evaporator liquid This high pressure liquid then goes through the refrigerant now a low pressure vapor goes the liquid line to the expansion valve The through the suction line back to the compressor thermostatic expansion valve meters liquid where the cycle is repeated 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 CONDENSER Se E SUCTION LINE LIQUID nt an FAN DISCHARGE MOTOR LINE EVAPORATOR PELL AP tetra THERMOSTATIC EXPANSION VALVE HEU EEE E TTT a a a o os a pum SS a RRRRRRRRDER d COMPRESSOR HIGH PRESSURE CUT OUT SWITCH GEAR MOTOR Refrigeration Schematic January 2
8. 000 Page 16 CLEANING and SANITATION NME1854 amp FME2404 To properly clean and maintain this product these steps must be followed for both systems 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 the machine running with a minimum of problems Maintenance and Cleaning should be scheduled at a minimum of twice per year _ ICE MAKING SYSTEM In place cleaning 1 Check and clean any water treatment devices if any are installed 2 Remove screws and the front panel 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 Sc
9. AL AND REPLACEMENT 1 To remove the auger remove the front and top panels WARNING Moving Parts Hazard Disconnect electrical power before beginning 2 Push back bail clamp holding ice chute cover to ice chute and remove cover 3 Unscrew and remove ice sweep 4 Loosen band clamp under ice chute and remove ice chute from evaporator NME1854 amp FME2404 ALLEN SCREWS CAUTION The auger has sharp edges handle with care BREAKER amp BEARING amp AUGER ASSEMBLY 5 Remove 4 allen screws holding breaker to evaporator 6 Drain the evaporator by pulling down and uncapping the evaporator drain tube 7 Pull up to 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 8 Replace the water seal 9 Reverse to reassemble January 2000 Page 21 NME1854 amp FME2404 SERVICE DIAGNOSIS No ice is made nothing operates Unit off due to no power Restore Power Unit off due to master switch in OFF position Switch master switch to ON Unit off due to low water level Check water supply filter strainer float valve Correct water supply 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 U
10. Inspect the auger the critical areas of the auger are 1 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 ee _ CAUTION __ Ice machine cleaner is an acid Handle it with extreme care keep out of the reach of children 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 January 2000 Page 27 NME1854 amp FME2404 REMOVAL AND REPLACEMENT 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 exposed 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 4 Pull or drive out the lower half of the water seal REMOVAL OF THE WATER SEAL WATER SEAL RETAINING LT RING Water Seal 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 rin
11. LER Location Typical Storage Bin with Extension and Bin Top After uncrating and inspection the unit is ready for installation Install the machine in a location where it has enough space around it to be accessible for service and reserve a minimum of 6 at the back for air circulation on air cooled models Avoid hot dirty and crowded locations Be sure that the location for the machine is within the limitations described on page 3 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 instead lift it there Pushing a bin especially 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 machine 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 January 2000 Page 4 NME1854 amp FME2404 FOR THE INSTALLER Loc
12. NME1854 amp FME2404 INTRODUCTION To the owner or user The service manual you are This product contains 2 separate ice making reading is intended to provide you and the systems in one cabinet maintenance or service technician with the information needed to install start up clean maintain and service this ice system Table of Contents This manual was printed on recycled paper Keep it for future reference Note the Warning symbol where it appears it marks a possible hazard January 2000 Page 1 NME1854 amp FME2404 FOR THE INSTALLER The FME2404 and the NME1854 are modular flakers designed to fit the following BACK VIEW Condenser Inlet W C Scotsman storage bins FPT eB90 and extensions with bin top KBT 18 eBH800 no bin top required f 9 5 9 25 eBH900 using bin top KBT14 i a i WB eBH1366 or BH1666 no bin BENE uc Electrical Inlet Water Inlet 37 Flare Drain 74 FPT Condenser Drain W C V2 FPT top required When installing a new system check to be sure that you have everything you need before beginning e Correct Bin TOP VIEW e Correct Ice Machine e Correct Bin Top if required e All kits legs and information required for the specific job Note Allow 6 behind and 6 Ice Chute above the unit for air circulation utility connections and service SPECIFICATIONS Ice Machine
13. ation ALLOW ROOM FOR AIR DO NOT STACK ANYTHING IN CIRCULATION FRONT OF THE MACHINE AND SERVICE ACCESS January 2000 Page 5 NME1854 amp FME2404 FOR THE PLUMBER CONFORM TO ALL APPLICABLE CODES Water Inlet Drains Air Cooled Models Connect to a water supply Air Cooled Models Connect a drain tube to the that is cold and potable Use 3 O D copper one FPT gravity drain fitting at the back of the tubing and connect to the single 32 male flare at cabinet used or both ice making systems A 74 the back of the cabinet This connection supplies inch per foot fall is the minimum pitch for the drain water to both ice making systems Install a hand tubing There MUST be a vent at the highest point valve near the machine to control the water supply of the drain line and the ideal drain receptacle is a Water Treatment In most areas a water filter of trapped and vented floor drain some type will be useful In areas where the water Use only 77 rigid tubing is highly concentrated with minerals the water Water Cooled Models Install a separate drain should be tested by a water treatment specialist tube for the condenser discharge water There is and the recommendations of the specialist one drain for both ice making systems Connect it regarding filtration and or treatment should be to the FPT condenser drain connection at the followed back of the cabinet Water Cooled Models A separate 3 O D copper line is recommended wit
14. e machine but it is not a service disconnect January 2000 Page 13 NME1854 amp FME2404 OPERATION Performance Typical Low Side Pressure e Air Cooled 34 38 PSIG e Water Cooled 32 PSIG Typical Discharge Pressure e Air Cooled 220 275 PSIG e Water Cooled 245 PSIG Typical Compressor Amp Draw e Single phase 4 3 e Three phase 2 8 Superheat e 5 degrees High Pressure Cut Out automatic reset e 450 PSIG Low Pressure Cut Out automatic reset e 15 PSIG Refrigerant Charge e Air Cooled 30 ounces R 404A e Water Cooled 24 ounces R 404A January 2000 Page 14 NME1854 amp FME2404 OPERATION Water Water enters the machine through the 3 8 male Reservoir overflow or evaporator condensation is flare at the rear of the cabinet splits into two routed to the drain separate lines flows to each water reservoir which it Water cooled models have a separate water circuit enters through the float valve The water then goes for the cooling water it enters the fitting at the rear out the bottom of the reservoir tanks to the bottom of divides and goes to the two water regulating valves each evaporator then through each water cooled condenser reconnects into one drain and down the drain WATER INLET WATER RESERVOIR LEVEL hi EVAPORATOR EVAPORATOR DRAIN DRAIN EVAPORATOR INLET WATER SCHEMATIC January 2000 Page 15 NME1854 amp FME2404 OPERATION Refrigeration The following
15. ed 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 The following procedure applies to each of the two separate ice making systems 1 Go through the prestart inspection 2 Open the hand valve observe that water enters the water reservorr 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 automatic There will be a short 15 second delay before the gear motor and compressor start 4 Air cooled models will begin to discharge warm air out the back of the cabinet Water cooled models will discharge warm water into the drain 5 The unit will soon be making ice If desired the low side pressure of each system may be checked it should be 33 psig or 2 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 200 psig and 280 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 lo
16. f 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 Drain Tube When uncapped and lowered drains the evaporator Condenser Air or water cooled where the heat removed in ice making is discharged Expansion valve The refrigerant metering device There are two of each of the above components in these machines Hi Pressure Cut Outs Condenser Expansion Valve Reservoir Drain Tube Gearbox Control Box January 2000 Page 10 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 Ice Sweep A plastic cap with fingers It revolves with the auger to sweep the ice into the ice chute WATER SEAL NME1854 amp FME2404 Breaker Divider 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 split phase motor that drives the gear reducer Thrust Bearing As the ice is pushed up the evaporator the auger is thrust do
17. g 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 REPLACING THE WATER SEAL PLACE FOOD GRADE SEALANT HERE 5 Carefully push the water seal rubber side against the auger shoulder and the silastic CAUTION _ Do not get any silastic onto the face of the seal 6 Allow the auger and seal to air dry until the silastic is dry on the surface T If the original water seal was leaking it would be a good idea to inspect the interior of the gear motor January 2000 Page 28 REMOVAL AND REPLACEMENT 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 machine 2 Unsweat the refrigerant connections a At the thermostatic expansion valve outlet MEM CAUTION 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 sweat in the new
18. h a separate hand valve to control it It is connected to a single 3 FPT condenser inlet at the back of the cabinet This connection supplies water to both water cooled condensers The water pressure to all lines must always be above 20 psig and below 80 psig AIR COOLED EE SUPPLIED Pr ae SE HAND N Dy Storage Bin Connect a separate gravity type drain tube similar to the air cooled drain Insulation of this drain line is recommended COMPLETE PLUMBING INSTALLATION WATER COOLED VALV PA ho x VENTED A DRAIN WATER COOLED HAND VALVE VENTED n DRAIN Y CONDENSER DRAIN January 2000 Page 6 WATER FILTER NME1854 amp FME2404 FOR THE ELECTRICIAN CONFORM TO ALL APPLICABLE CODES Connect electrical power to the leads in the Voltage variation must remain within design junction box at the rear of the machine limitations even under starting conditions Check the nameplate located on the back panel All external wiring must conform to national for the voltage requirements and for the minimum state and local electrical codes The use of a circuit ampacity The machine requires a solid licensed electrician is required to perform the chassis to earth ground wire electrical installation The ice machine must be connected to its own electrical circuit so that it is individually fused WATER COOLED AIR COOLED POWER SUPPLY
19. ion pressure due to low refrigerant charge Locate leak Recover refrigerant repair leak replace dryer evacuate and weigh in the nameplate charge January 2000 Page 22 NME1854 amp FME2404 SERVICE DIAGNOSIS Symptom Possible Cause Probable Correction Water Leak Drain plugged up Clean out drain Tubing cracked Replace tubing Condensation on drain tubing Insulate tubing Hose off Reattach 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 water remove the auger replace the water seal Check gear motor for water infiltration Excessive water use Water cooled model water regulating Adjust to 245 PSIG discharge valve not adjusted properly pressure Reservoir float valve leaks thru Replace float valve or seat Water cooled model overcharged Recover and weigh refrigerant Weigh with refrigerant in correct charge Water cooled model condenser Acid clean water cooled condenser coated with minerals Excessive ice meltage Bin drain clogged Clean out bin drain Improper installation of drains they Drains must be separate are connected Poor fit between bin door and door Adjust or replace frame Machine makes too much noise Evaporator coated internally with Clean with Scotsman Ice Machine minerals Cleaner Motor bearing
20. 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 tester 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 rep
21. l of the auger water seal evaporator and gear motor must begin at the top of the assembly To Remove the Breaker Bearinc AWARNING Assembly Moving parts hazard Disconnect electrical power before beginning 1 Remove panels and disconnect electrical power 2 Push bail clamp back 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 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 Step 5 a Step 5 b BREAKER COVER Bearing And Breaker 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 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 par
22. lace 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 24 NME1854 amp FME2404 REMOVAL AND REPLACEMENT Water Reservoir amp Bin Controls WATER 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 as shown and pull valve up Note The plunger seat is available as a separate part 6 To remove reservoir pull up and remove water sensor 7 Disconnect water outlet tubes 8 Remove the two screws holding reservoir to bracket 9 Remove reservoir from machine 10 Reverse steps 1 9 to reassemble ICE CHUTE SLIDE BIN CONTROLS IN AND OUT FLOAT ASSEMBLY LOCKING TABS BIN CONTROLS Ice Level Sensors 1 Disconnect electrical power 2 Remove the front panel 3 Remove the control box cover 4 Locate the 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 bin control at 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 25 NME1854 amp FME2404 REMOVAL AND REPLACEMENT Note Remova
23. nit off due to high pressure control open Check for water interruption water cooled or fan motor failure air cooled 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 gearmotor condition and scale on auger and in evaporator Low pressure control open Auger not turning due to motor failure auger relay failure on circuit board or gears stripped Check drive train TXV restricted or not metering Check bulb temperature Lack of refrigerant Check for leak Check for a restricted system No power to circuit board Check harness 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 compressor relay will not close Check replace board Unit makes ice but very slowly High discharge pressure because of a dirty condenser Clean the air filter and condenser Low cap because auger amp evaporator are coated with mineral scale Clean the water system Low suct
24. otor check for oil leaks noise and amp draw To Inspect the gear motor A Remove the cap screws holding the gear motor case Note There are two gear halves together and pry the two cases apart motors in each unit 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 January 2000 Page 30 REMOVAL AND REPLACEMENT Fans Electrical Shock Hazard Disconnect electrical power before beginning LOCATING Removing Condenser Fan Motor Assembly 1 Remove the top panel 2 Unplug the two fan motor wire leads from the fan motors 3 Remove two hex head bolts from top end of fan motor assembly see the illustration 4 Lift up and pull out the fan motor assembly 5 Repair as needed 6 To reassemble Place the fan motor assembly lower flange holes over the two allen head cap screws in the base and reinstall the hex head bolts at the top of the assembly Plug the fan motors back in and replace the top panel January 2000 Page 31 TT T NME1854 amp FME2404 S SOM a A Ss fs SX 78 SAT 5 ic EXAM i7 j FAN MOTOR ASSEMBLY
25. otsman Ice Machine A WARNING 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 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 machine 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 the 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 55 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 thoro
26. rating the machine outside of the limitations is misuse and can void the warranty Water Limitations An ice machine is a food manufacturing plant it takes a raw material water and turns it into a food product ice The purity of the water is very important in obtaining pure ice and in maximizing product life This is not intended as a complete resource for water related questions but it does offer these general 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 will be effective in all situations That is why a water test is important RO Water Limitation Water conductivity must be no less than 35 microSiemens cm Air Temperature 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 ocotsman 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 ocotsman reserves the right to make design changes and or improvements at any time opecifications and design are subject to change without notice May 2001 Page 3 NME1854 amp FME2404 FOR THE INSTAL
27. s Lr 3 Se ee a RE z TERET o Clean each air cooled condenser Use a vacuum cleaner or coil cleaner if needed Do NOT use a wire brush FAN MOTOR WARNING Moving Parts Hazard Disconnect electrical power before beginning E Ame a aN TY My CRE E E 3 f e p yf EM SAS A Gs h 4 4 4 So 4 A Remove top panel B Remove two screws and unplug the fan motors C Pull fan motor assembly off of locating pins and out of the unit D Clean the condenser reassemble by placing the fan motor assembly onto the locating pins replacing the mounting screws plugging the fan motors back in and replacing the top panel Reconnect power h S y vm GG January 2000 Page 20 AUGER MAINTENANCE In some areas the water supply to the ice machine 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 of these parts see REMOV
28. s dry Oil or replace motor January 2000 Page 23 NME1854 amp FME2404 CONTROL SYSTEM DIAGNOSTICS The control system consists of e Control Board eWater Sensor e ce Sensors eHigh Pressure Cut Out e ow 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 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
29. sor stops e The auger motor stays on for 1 more minute clearing out ice in the evaporator and then e he auger motor relay opens LED3 goes out and the auger motor stops The compressor will not restart 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 eBin Full Red Normally Off when making ice eLED1 White Located next to the board s Compressor Relay Normally Glowing when making ice eLED3 White Located next to the board s Auger Motor Relay Normally Glowing when making ice When the water level in the reservoir falls below 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 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 eThe PWR OK light glows and the machine starts up again 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 contactor coil e f the auger drive motor current becomes excessive the compressor and auger drive motor will be switched Off and the Ser
30. t number 19 0569 01 to the seal area before installing on the auger b Check the seal to shaft areas for cuts or rough spots none are permitted Step 5 c and Step 6 BEARING SLOTTED COLLAR January 2000 Page 26 NME1854 amp FME2404 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 WARNING Disconnect electrical power before beginning Use care when removing the auger it has very sharp edges 1 The top panel must be removed 2 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 AUGER ASSEMBLY 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 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
31. ughly 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 Replace the front panel January 2000 Page 17 NME1854 amp FME2404 SENSOR MAINTENANCE These steps must be followed for both systems 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 ICE LEVEL SENSORS SLIDE TO REMOVE CLEAN THE LIGHT SENSORS 2 The Ice machine senses water level by a probe Clean the Probe s Tip with ice located in the water reservoir At least twice a year machine cleaner and a clean the probe should be removed from the reservoir dedo i soft cloth and the tip wiped clean of mineral build up January 2000 Page 18
32. vice 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 compressor is restarted 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 e he contactor is energized connecting power to the compressor and the compressor starts eAs ice is made it passes between the ice level sensors but because it is not a continuous stream then be glowing continuously It only interupts the sensor s infrared beam To Reset Disconnect and reconnect power to momentarily The bin full light remains off and the the ice machine 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 Other Protection Devices e f the high pressure cut out switch opens the machine will stop immediately It will automatically reset when the pressure falls below its cut in point elf the low pressure cut out switch opens the machine will stop immediately It will automatically reset when the pressure rises above its cut in point e The mode on off switch is the manual control for the complet
33. wer 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 and mail it to Scotsman January 2000 Page 9 NME1854 amp FME2404 COMPONENT DESCRIPTION Control Box Contains the electrical controls that operate the machine High Pressure Cut Out Switch An automatic 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 Low Pressure Cut Out Switch An automatic reset control that shuts off the ice machine when the low side pressure drops below a preset point 15 PSIG Evaporator A vertical stainless steel tube refrigerated and water filled In it there is a stainless steel auger Compressor The refrigerant vapor pump Reservoir Float operated it maintains 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 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 o
34. wn and pressure from the auger thrust is taken up by this bearing ICE SWEEP BEARING BREAKER DIVIDER AUGER EVAPORATOR MOTOR January 2000 Page 11 NME1854 amp FME2404 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 compressor contactor Potential Relay The compressor start relay On Off Switch Manual control for the machine Control Board Water OK Light Power Light LECT B390hi JH pa b ea Zi Service Light V Dy 716 y ARC B 4 q p ai ms Freeze Light Jd E P Bin Full Light LED1 Compressor LED3 Relay Auger Relay January 2000 Page 12 NME1854 amp FME2404 ELECTRICAL SEQUENCE There are indicator lights on the control board eWTR OK Water OK Green Normal Glowing Glows when there is water in the reservoir ePWR OK Power OK Green Normal Glowing Glows when the control board has power and is functional eService Red Normally Off eFreeze Red Normally glowing when making ice Shut Down e The compressor relay opens LED1 goes out e The compressor contactor opens e The compres
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