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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 machine is a modular ice system that fits a
variety of Scotsman ice storage bins.

It features: front service for the freezer, gear
motor, control box, water reservoir, and bin control;
an electronic circuit for monitoring ice and water
level; a thermostatic expansion valve; and R-404A
as the refrigerant.

This manual was printed on recycled paper.

Keep it for future reference.

TABLE OF CONTENTS

FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2

SAMPLE BIN AND MACHINE COMBINATIONS . . . . . . . . . . . . . . . . . . . . . . Page 3

FOR THE INSTALLER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 4

FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 6

FOR THE ELECTRICIAN . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7

START UP

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 9

COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10

COMPONENT DESCRIPTION: Control Box . . . . . . . . . . . . . . . . . . . . . . . . Page 11

ELECTRICAL SEQUENCE: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13

OPERATION: Water . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 14

OPERATION: Refrigeration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15

OPERATION: Performance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 15

SANITIZING AND CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 16

MAINTENANCE AND CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 17

MAINTENANCE: Air Cooled . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 18

MAINTENANCE AND CLEANING: Auger . . . . . . . . . . . . . . . . . . . . . . . . . Page 19

SERVICE DIAGNOSIS: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 20

REMOVAL AND REPLACEMENT: Water Reservoir & Bin Controls . . . . . . . . . . . . Page 22

REMOVAL AND REPLACEMENT: Bearing And Breaker . . . . . . . . . . . . . . . . . . Page 23

REMOVAL AND REPLACEMENT: Auger . . . . . . . . . . . . . . . . . . . . . . . . . Page 24

REMOVAL AND REPLACEMENT: Water Seal . . . . . . . . . . . . . . . . . . . . . . . Page 25

REMOVAL AND REPLACEMENT: Evaporator . . . . . . . . . . . . . . . . . . . . . . . Page 26

REMOVAL AND REPLACEMENT: Gearmotor . . . . . . . . . . . . . . . . . . . . . . . Page 27

REMOVAL AND REPLACEMENT: Fans . . . . . . . . . . . . . . . . . . . . . . . . . . Page 28

REFRIGERATION SYSTEM SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 29

LIQUID CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 30

CIRCUIT BOARD TESTING: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 31

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

Note the warning symbol
where it appears. It marks a
possible hazard.

NME950 & FME1200

January 1995

Page 1

Содержание FME1200

Страница 1: ... START UP Page 9 COMPONENT DESCRIPTION Page 10 COMPONENT DESCRIPTION Control Box Page 11 ELECTRICAL SEQUENCE Page 13 OPERATION Water Page 14 OPERATION Refrigeration Page 15 OPERATION Performance Page 15 SANITIZING AND CLEANING Page 16 MAINTENANCE AND CLEANING Page 17 MAINTENANCE Air Cooled Page 18 MAINTENANCE AND CLEANING Auger Page 19 SERVICE DIAGNOSIS Page 20 REMOVAL AND REPLACEMENT Water Reserv...

Страница 2: ...ndalwood A stainless steel panel kit SPKFM21 may be field installed to convert the unit to a stainless steel finish ELECTRICAL INLET WATER INLET 7 3 5 25 3 3 4 7 46 Condenser Inlet 3 8 FPT Condenser Drain 1 2 FPT DRAIN 3 4 FPT 4 9 2 9 9 43 BACK VIEW WATER COOLED SPECIFICATIONS ICE MAKER ELECTRICAL INLET 3 2 1 5 7 WATER INLET 3 8 FLARE DRAIN 3 4 FPT BACK VIEW AIR COOLED 5 25 9 5 Note Allow 6 behind...

Страница 3: ...dels is In the Front and Out the Back SAMPLE BIN AND MACHINE COMBINATIONS FME1200 ON BH550 NME950 ON BH800 FME1200 ON BH900 Bin Top Kit Required The Nameplate is located on the back of the machine NME950 FME1200 January 1995 Page 3 ...

Страница 4: ...ions 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 No...

Страница 5: ...FOR THE INSTALLER Location TWO UNITS ON ONE BIN ALLOW ROOM FOR AIR CIRCULATION AND SERVICE ACCESS DO NOT STACK ANYTHING IN FRONT OF THE MACHINE S NME950 FME1200 January 1995 Page 5 ...

Страница 6: ...binet 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 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 floo...

Страница 7: ...hine 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 W...

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 over the top of the machine for service access 9 Is there a wa...

Страница 9: ...g valve will open and warm water will be discharged into the drain 5 The unit should soon be making ice if desired the low side pressure may be checked it should be 32 psig or 2 psig The 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 b...

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

Страница 11: ... 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 SWITCH LOW PRESSURE CUT OUT SWITCH POTENTIAL RELAY TRANSFORMER CONTACTOR CIRCUIT BOARD No Water light glows when there is not enough water in the...

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: ... 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 machine will start up again Another purpos...

Страница 14: ...the bottom of the 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 goes to the water regulating valve then to the water cooled condenser and down the drain EVAPORATOR DRAIN WATER LEVEL EVAPORATOR ICE CHUTE DRAIN STRAINER WATER SCHEMATIC RESERVOIR WATER INLET EVAP...

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

Страница 16: ...ded 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 18 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 wi...

Страница 17: ...wo 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 RESERVOIR CAUTION...

Страница 18: ...denser 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 MAINTENANCE Air Cooled 1 REMOVE TOP PANEL 2 REMOVE TWO SCREWS UNPLUG FAN MOTORS 3 PULL FAN MOTOR ASSEMBLY UP AND OUT 4 CLEAN CONDENSER FINS TO GAIN ACCESS TO CONDENSER SURFACE Electrical...

Страница 19: ... 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 lowering and uncapping the evaporator drain hose 7 Pull up to remove auger After the auger has been removed allow the...

Страница 20: ...stricted system Centrifugal switch in auger motor does not close Check replace centrifugal switch No power to circuit board transformer is open Replace transformer 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 st...

Страница 21: ...er regulating valve not adjusted properly Adjust to 245 PSIG discharge pressure Reservoir float valve leaks thru Replace float valve or seat Water cooled model overcharged with refrigerant Recover and weigh refrigerant Weigh in correct charge Water cooled model condenser coated with minerals Acid clean water cooled condenser Excessive ice meltage Bin drain clogged Clean out bin drain Improper inst...

Страница 22: ...emble BIN CONTROLS Ice Level Sensors 1 Disconnect electrical power 2 Remove front panel 3 Remove control box cover 4 Locate ice chute at the base of the chute in front of and behind it are two plastic bin control mounts 5 Slide each bin control to the left and in the control box disconnect the electrical leads connecting the bin control to the circuit board 6 Reverse to reassemble be certain that ...

Страница 23: ...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 ...

Страница 24: ...om 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 ice machine cleaner and hot water WARN...

Страница 25: ...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 26: ...e charge Check for leaks 8 Install auger breaker breaker bearing assembly and ice discharge chute in reverse order of disassembly 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 ...

Страница 27: ...H AUGER DRIVE MOTOR ROTOR BEARING SEAL WATER SHED 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 motor attached up and away from the gear motor case Note The gearcase cover o...

Страница 28: ...embly 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 REMOVAL AND REPLACEMENT Fans Electrical shock hazard Electrical shock can cause personal injury Disconnect power before beginning to service component...

Страница 29: ... 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 When one ...

Страница 30: ...rge 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 ...

Страница 31: ...evel sensors are properly aligned clean and not obstructed use the tester as follows Bin Control 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 a Move the bin full switch on the tester to Full The light ...

Страница 32: ...eplace the circuit board 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 LIGHT ON WATER SENS SWITCH TO NO WATER CIRCUIT BOARD TESTING LIGHT OFF SWITCH TO W...

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