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INTRODUCTION

To the owner or user: The service manual you are
reading is intended to provide you, and the
maintenance or service technician, with the
information needed to install, start up, clean,
maintain, and service this ice system.

This product contains 2 separate ice making
systems in one cabinet.

TABLE OF CONTENTS

Installation

For the Installer

Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Storage Bin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

For the Plumber . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

For the Electrician . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Final Check List . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Start Up

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Component Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10

Electrical Sequence

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13

Operation

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14

Maintenance and Cleaning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

Service Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Removal and Replacement

Reservoir and Bin Controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24

Bearing and Breaker . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25

Auger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

Water Seal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27

Evaporator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Gear motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Fan Motor Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Electronic Tester . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32

Parts lists and wiring diagrams are in the center of this manual, printed on yellow paper.

This manual was printed on recycled paper. Keep
it for future reference.
Note the Warning symbol where it appears, it
marks a possible hazard.

NME1850 & FME2400

January 1994

Page 1

Содержание FME2400

Страница 1: ... the Electrician 7 Final Check List 8 Start Up 9 Component Description 10 Electrical Sequence 13 Operation 14 Maintenance and Cleaning 16 Service Diagnosis 20 Removal and Replacement Reservoir and Bin Controls 24 Bearing and Breaker 25 Auger 26 Water Seal 27 Evaporator 28 Gear motor 29 Fan Motor Assembly 30 Refrigeration 31 Electronic Tester 32 Parts lists and wiring diagrams are in the center of ...

Страница 2: ...4 x 27 208 230 60 3 Flake Air FME2400WE 3A 42 x 24 x 27 208 230 60 3 Flake Water NME1850AE 32A 42 x 24 x 27 208 320 60 1 Nugget Air NME1850WE 32A 42 x 24 x 27 208 320 60 1 Nugget Water NME1850AE 3A 42 x 24 x 27 208 230 60 3 Nugget Air NME1850WE 3A 42 x 24 x 27 208 230 60 3 Nugget Water The normal finish for the ice machine is enamel sandalwood A stainless steel panel kit Electrical Inlet 3 Water I...

Страница 3: ...r 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 Scotsman Ice Systems are designed and manufactured with the highest regard for safety and performance They meet or exceed the s...

Страница 4: ...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 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 Maker The machine is he...

Страница 5: ...FOR THE INSTALLER Location ALLOW ROOM FOR AIR CIRCULATION AND SERVICE ACCESS DO NOT STACK ANYTHING IN FRONT OF THE MACHINE S NME1850 FME2400 January 1994 Page 5 ...

Страница 6: ...oled condensers The water pressure to all lines must always be above 20 psig and below 80 psig Drains Air Cooled Models There is one 3 4 FPT drain for both ice making systems 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 recepta...

Страница 7: ...ine requires a solid chassis to earth ground wire The ice maker should be connected to its own electrical circuit so it would be individually fused Voltage variation must remain within design limitations even under starting conditions 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 WA...

Страница 8: ...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 7 Has the machine been secured to the bin 8 Is there clearance above the top of the machine for service access 9 Is there a wa...

Страница 9: ...arged into the drain 5 The unit should 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 a...

Страница 10: ...the reservoir to make ice out of Will shut the machine off it there is none Ice Discharge Chute Directs the ice produced by the evaporator into the storage bin Ice Level Sensor An electronic eye it senses the presence of ice in the bottom of the ice discharge chute Operates to turn the ice machine on and off automatically as the level of ice in the bin changes Gear Motor An oil filled speed reduct...

Страница 11: ...n time delay to clear the evaporator of ice when the unit turns off and for the compressor contactor Transformer Supplies low voltage to the circuit board Low Pressure Cut Out Switch A manual reset control that shuts off the ice machine when the low side pressure drops below a preset point 0 4 psig Potential Relay The compressor start relay On Off Switch Manual control for the machine ON OFF SWITC...

Страница 12: ...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 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 down and pressur...

Страница 13: ...that point the bin empty light goes out and the machine shuts down Shut Down consists of The 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 motor relay opens and the auger motor stops If the ice level sensor is clear bin empty for more than 15 seconds the...

Страница 14: ...the bottom of each evaporator 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 divides and goes to the two water regulating valves then through each water cooled condenser reconnects into one drain and down the drain EVAPORATOR DRAIN WATER LEVEL EVAPORATOR ICE CHUTE DRAIN S...

Страница 15: ...ters an area of relatively low pressure where it can easily boil off or evaporate As it evaporates it absorbs heat from the evaporator and whatever is in contact with it such as the water inside it After the evaporator the refrigerant now a low pressure vapor goes through the suction line back to the compressor where the cycle is repeated CONDENSER FAN MOTOR LIQUID LINE THERMOSTATIC EXPANSION VALV...

Страница 16: ...he 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 115o F potable water with 1 ounce of household bl...

Страница 17: ...cked at least two times per year A Check the bearing by removing the ice chute cover unscrewing the ice sweep removing the water shed unscrewing the breaker cover unscrewing the auger stud Inspect the assembly looking for wear See Removal and Replacement to replace bearing or seals Reverse to reassemble 4 Check and tighten all bolts and screws CLEAN THE WATER LEVEL PROBE PULL UP TO REMOVE PROBE RE...

Страница 18: ...wo screws and unplug the fan motors 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 TOP PANEL FAN MOTOR ASSEMBLY CAP SCREW LOCATING PINS UNPLUG LEADS MAINTENANCE Air Cooled Disconnect electrical power before beginning NME1850 FME2400 January 1994 Page ...

Страница 19: ... auger remove the front and top panels 2 Push back bail clamp holding ice chute cover to ice chute and remove cover 3 Unscrew and remove ice sweep 4 Loosen band clamp under ice chute and remove ice chute from evaporator 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 b...

Страница 20: ...rge 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 coo...

Страница 21: ...l light on the tester should be ON if not replace the circuit board If the bin full light on the tester is ON move the tester 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 not replace the circuit board If it does as above and the machine still does not run replace the ice level sensors 3 If the transformer is fine and the no ...

Страница 22: ...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 compre...

Страница 23: ... leaks replace the water seal if found to be leaking 3 Check the low side pressure normal is about 32 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 insulat...

Страница 24: ...o reassemble 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 contr...

Страница 25: ...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...

Страница 26: ...aporator d Lift up 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 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 ic...

Страница 27: ...gainst it 3 The part of the water seal that rotates with the auger must also be replaced Remove the old part from the auger and clean the mounting area 4 Place a small bead of food grade silastic sealant such as 732 RTV or Scotsman part number 19 0529 01 on the area of the auger where the water seal is to be mounted 5 Carefully push the water seal rubber side against the auger shoulder and the sil...

Страница 28: ...rier in the liquid line 7 Evacuate the system until dehydrated then weigh in the nameplate charge Check for leaks 8 Install auger breaker breaker bearing assembly and ice discharge chute in reverse order of disassembly See To Reassemble Evaporator and Auger To Reassemble the Evaporator and Auger 1 After the gear motor has been inspected fasten the evaporator to the gear motor Torque the bolts to 1...

Страница 29: ...of the machine 3 Remove the gear motor from the ice maker Bench test the gear motor check for oil leaks noise and amp draw To Inspect the gear motor A Remove the cap screws holding the gear motor case halves together and pry the two cases apart B To lift off the cover lift up until you can feel internal contact then pull the cover towards the output gear end and then lift the cover with drive moto...

Страница 30: ...an 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 FAN MOTOR ASSEMBLY Disconnect electrical power before beginning NME1850...

Страница 31: ...achine uses R 404A refrigerant and polyolester oil Do NOT use mineral oil in this refrigeration system R 404A is a Near Azeotrope so liquid charging is required When the system is serviced a special liquid line drier is required It is included with replacement compressors HP62 is not compatible with mineral oil so these ice machines use Polyolester oil Polyolester oil absorbs water very easily Whe...

Страница 32: ...tester into the circuit board 3 Unplug water sen connector from control board 4 Plug water sen connector from Scotsman tester into circuit board 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 ...

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