Scotsman FM1202R, Service Manual

Page 1: ...e and water level a thermostatic expansion valve and R 22 as the refrigerant TABLE OF CONTENTS For the Installer Specifications 2 Location 4 Remote Condenser 5 For the Plumber 8 For the Electrician 9 Final Check List 13 Start Up 14 Component Description 15 Operation 17 Maintenance Cleaning 22 Service Diagnosis 25 Removal and Replacement Water Reservoir Bin Controls 29 Thrust Bearing Breaker 30 Aug...

Page 2: ...ation required for the specific job Back View Liquid Line Connection Discharge Line Connection Remote Condenser Junction Box Electrical Inlet Water Inlet 3 8 Flare Drain 3 4 FPT 2 96 3 5 25 20 84 Allow 6 above machine for service The Standard Finish is Enamel Sandalwood There is an optional stainless steel panel kit SPKFM21 available to convert the unit to Stainless Steel It is field installed Mod...

Page 3: ...ne set 40 R 22 KCMR230 Fan Relay Kit used when two 230 volt 32 ice makers are on one 230 volt 32 two circuit condenser DIMENSIONS H X W X D MODEL USE WITH MINIMUM CIRC AMPACITY BASIC ELECTRICAL RC1022 32 RC1222 32 27 8 X 22 X 37 94 SAME 1 FM1202R 1 or 2 FM1202R S 2 2 208 230 60 1 SAME Included with the ice makers minimum circuit ampacity Use this value to determine wire size between ice maker and ...

Page 4: ...ll 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 Be sure to allow a 6 minimum space above the top of the machine for service Installation Limitations This ice system is designed to be installed indoors in a controll...

Page 5: ...ne have quick connect couplings one end has a schrader valve connection that end goes to the condenser Note The openings in the building ceiling or wall listed in the next step are the minimum sizes recommended for passing the refrigerant lines through 2 Have the roofing contractor cut a minimum hole for the refrigerant lines of 1 3 4 inch Check local codes a separate hole may be required for the ...

Page 6: ...aker fitting marked liquid line Final Connections 3 Begin tightening the couplings together by hand then using two wrenches it is important that ONLY the nut on the precharged lines be turned the other parts of the couplings must NOT be allowed to turn or the process will tear out the diaphragms and they will be loose in the refrigeration system tighten the coupling until it bottoms out or a defin...

Page 7: ...STALLER Location TWO UNITS ON ONE CONDENSER REMOTE CONDENSER EXCESS PRECHARGED TUBING INSIDE BUILDING ICE MAKERS SERVICE ACCESS SERVICE ACCESS SIDE AND BACK ROOF CUTAWAY WALL CUTAWAY FM1202R November 1992 Page 7 ...

Page 8: ... 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 Storage Bin A separate gravity type drain needs to be run Insulation of this drain line is recommended FLOOR DRAIN VENT BIN DRAIN 3 4 FPT V...

Page 9: ...the compressor and the fan motor operates whenever the compressor operates Electrical connections are made at the junction box at the back of the ice maker and at the junction box on the remote condenser The remote condenser must be wired to the ice maker in accordance with local and national electrical codes with a minimum of 18 Awg wire with an ground bonding wire connected to the ground screws ...

Page 10: ... a solid earth ground wire to the ground screw 3 Route connecting wires from the first ice maker junction box marked condenser fan and connect it to the KCMR230 terminal strip marked NO 1 ICE MACHINE 4 Route connecting wires from the second machine junction box marked condenser fan and connect it to the KCMR230 terminal strip marked NO 2 ICE MACHINE 5 Route connecting wires from KCMR230 terminal s...

Page 11: ...erminals 1 and 3 Compare the readings obtained to the ones in the following list C Test terminals 1 2 Full Voltage 208 230 Test terminals 1 3 No voltage Test terminals 2 3 Full Voltage Test terminals 2 4 No voltage Test terminals 3 4 Full voltage Test terminals 1 4 Full voltage D If there is full voltage where there should be no voltage turn off ice maker 2 both switches Then turn off ice maker 1 ...

Page 12: ...SULATED PRECHARGED REFRIGERANT TUBING A typical installation should generally appear as illustrated below The remote condenser must be located above the ice maker and the precharged lines installed per the instructions on page 6 FM1202R November 1992 Page 12 ...

Page 13: ... 20 psig 7 Has the machine been secured to the bin 8 If two units on one condenser has the relay kit been installed 9 Is there a water shut off valve installed near the machine 10 Is the remote condenser installed per local building codes and in a place where it has adequate ventilation and minimal solar heat gain 11 Has all shipping material and literature inside the front panel been removed from...

Page 14: ...Valve 4 Turn 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 liquid line valve will open the low pressure control will close and the compressor will start 5 The remote condenser fan turns and the condenser begins to discharge warm air 6 The unit should soon be making ice...

Page 15: ...out of Will shut the machine off it there is none Ice Discharge Chute Directs the ice produced by the evaporator into the storage bin Ice Level Sensor An electronic eye it senses the presence of ice in the bottom of the ice discharge chute Operates to turn the ice machine on and off automatically as the level of ice in the bin changes Gear Motor An oil filled speed reduction gearbox driving the au...

Page 16: ... with a built in time delay to clear the evaporator of ice when the unit turns off and for the liquid line valve Transformer Supplies low voltage to the circuit board Pump Down Control An automatic reset pressure switch connected to the low side of the refrigeration system Controls the compressor Potential Relay The compressor start relay On Off Switch Manual control for the machine CONTACTOR ON O...

Page 17: ... seconds bin full At that point the bin empty light goes out and the machine shuts down Shut Down consists of The liquid line solenoid closes lowering the suction pressure The pump down control 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...

Page 18: ...which it enters through the float valve The water them goes out the bottom of the reservoir tank to the bottom of the evaporator Reservoir overflow or evaporator condensation is routed to the drain ADJUSTMENT OF THE WATER LEVEL WATER RESERVOIR RESERVOIR DRAIN TUBE WATER LEVEL WATER INLET DRAIN FM1202R November 1992 Page 18 ...

Page 19: ... upon the temperature of the evaporator warmer evaporators get more refrigerant and colder evaporators get less 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 pressur...

Page 20: ...rigerant into the condenser with a small amount of discharge gas going into the receiver to maintain pressure until the head pressure is built back up to the rated gauge pressure of 220 psig At that pressure the valve opens up the liquid line from the condenser to the receiver LIQUID LINE VALVE THERMOSTATIC EXPANSION VALVE SUCTION LINE KING VALVE Refrigeration Schematic COMPRESSOR RECEIVER HEAD PR...

Page 21: ... this point the refrigerant flow is stopped by the closed liquid line valve This action forces the refrigerant into the receiver and keeps it out of the compressor The pump down continues until the low pressure control turns the compressor off REMOTE CONDENSER EVAPORATOR DISCHARGE LINE LIQUID LINE HEAD PRESSURE CONTROL VALVE RECEIVER COMPRESSOR Refrigeration Schematic KING VALVE SUCTION LINE THERM...

Page 22: ...and Hydroxyacetic acids These compounds are corrosive and 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 7 Prepare the cleaning solution Mix eight ounces of Scotsman Ice Machine Cleaner with three quarts of hot water The solution should be between 90 an...

Page 23: ...ineral build up 3 The top bearing in the breaker should also be checked at least two times per year Check the breaker bearing by removing the ice chute cover unscrewing the ice sweep removing the water shed unscrewing the breaker cover left hand thread unscrewing the auger stud Inspect the assembly looking for wear 4 Clean the remote condenser Use a vacuum cleaner or coil cleaner if needed Do NOT ...

Page 24: ...rding water treatment For more information on removal and replacement of these parts see REMOVAL AND REPLACEMENT 1 To remove the auger remove the front and top panels 2 Remove 3 hex studs 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 ...

Page 25: ...the head pressure control valve it should be maintaining a head pressure above 220 psig If the unit has the correct charge and the condenser is clean and the refrigerant lines are not kinked or twisted and the condenser is not overheated by external heat loads the head pressure should be under the trip out point of the head pressure control switch If all of the above are found to be good and the m...

Page 26: ...place 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 water light is ON check the water level sens...

Page 27: ...arbox and Check for internal damage repair and replace in the machine b Check for low charge add some refrigerant if the unit begins to operate normal low side pressure being about 25 psig stop and look for a leak recover 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 we...

Page 28: ...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 i...

Page 29: ... maker 8 Reverse to reassemble 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 re...

Page 30: ...breaker to evaporator d Lift up and remove breaker bearing assembly from auger 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 ...

Page 31: ...r left hand threads b Unscrew auger stud from top of auger c Unscrew 4 allen head cap screws holding breaker to evaporator d Lift up on breaker to remove from auger If the auger is stuck Use a slide hammer type puller to pull on the auger at the threaded hole The size of that hole is 5 8 18 Inspect the auger the critical areas of the auger are a The auger body It should be clean and shining Someti...

Page 32: ...ace 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 water seal is to be mounted 5 Carefully push the water seal ru...

Page 33: ... heat sink material Specifically Recover reclaim or recycle refrigerant Although the method chosen is up to the service company Scotsman recommends reclaim There are various mechanical devices that may be used to recycle refrigerant at the field level however Scotsman requires that any refrigerant placed into a Scotsman ice machine meet ARI spec 700 88 Reclaim programs are available thru most refr...

Page 34: ...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 thrust bearing assembly PLACE A BEAD OF FOOD GRADE SEALANT HERE REMOVAL AND REPLACEMENT Evaporat...

Page 35: ...ce oil level too high carefully inspect the bearings and gears If in doubt about the condition of a part replace it The oil quantity is 14 fluid ounces do not overfill Note The gears and bearings are available only as pressed together sets D After replacing parts as required if any reassemble the gearcase The two smaller gears and the oil should be in the lower case the output gear will be with th...

Page 36: ...power on the master switch on and all the 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 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 mo...

Page 37: ...ter position The No Water light on the circuit board should go ON If not replace 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 LIGHT ON WATER SENS SWITCH TO NO WATER LIGHT OFF SWITCH TO WATER FM1202R November 1992 Page 37 ...