Scotsman FM1200R Service Manual Download | Manualshive

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OPERATION: Refrigeration

PUMP DOWN

During the pump down cycle (usually initiated
by the circuit board de-energizing the liquid
line valve) the discharge gases flow through
their normal path to the remote condenser,
through the head pressure control, and into
the receiver. At 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

THERMOSTATIC

EXPANSION

VALVE

LIQUID LINE

VALVE

FM1200R

November, 1988

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Summary of Contents for FM1200R

Page 1: ...tronic circuit for monitoring ice and water level a thermostatic expansion valve and R 502 as the refrigerant TABLE OF CONTENTS For the Installer Specifications 2 Location 5 Remote Condenser 6 For the Plumber 9 For the Electrician 10 Final Check List 14 Start Up 15 Component Description 16 Operation 18 Maintenance Cleaning 23 Service Diagnosis 26 Removal and Replacement Water Reservoir Bin Control...

Page 2: ...enser 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 Minimum Circuit Ampacity is used to determine wire size and type per National Electric Code 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 Model Number FM12...

Page 3: ...are designed and manufactured with the highest regard for safety and performance They meet or exceed the standards of UL NSF and CSA Scotsman assumes no liability or responsibility of any kind for products manufactured by Scotsman that have been altered in any way including the use of any part and or other components not specifically approved by Scotsman Scotsman reserves the right to make design ...

Page 4: ...0 Fan Relay Kit used when two 230 volt 32 icemakers are on one 230 volt 32 two circuit condenser DIMENSIONS H X W X D MODEL USE WITH MINIMUM CIRC AMPACITY BASIC ELECTRICAL RC1051 32 RC1052 32 RC551 1 27 8 X 22 X 37 94 SAME SAME 1 FM800R 32 1 or 2 FM800R S 32 1 FM800R 1 2 2 4 1 208 230 60 1 SAME 115 60 1 Included with the icemakers minimum circuit ampacity Use this value to determine wire size betw...

Page 5: ...eling later Return the bin to the upright position remove paper covering the bin gasket Install the bin top according to the directions with the bin top 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 Ice Maker The machine is heavy so the use of a mechanical lift is recommended for lifting the machine ...

Page 6: ...ns 1 Each set of precharged refrigerant lines either 25 foot or 40 foot consists of a 3 8 inch diameter liquid line and a 1 2 inch diameter discharge line Both ends of each line 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 th...

Page 7: ...definite increase in resistance is felt 4 Using a marker or pen mark a line lengthwise from the coupling union nut to the bulkhead Then tighten the coupling and additional 1 4 turn As the nut turns the line will show when 1 4 turn is made 5 Connect the 3 8 inch liquid line schrader valve end to the remote condenser fitting marked liquid line 6 Connect the other end of the liquid line to the icemak...

Page 8: ...NSTALLER Location TWO UNITS ON ONE CONDENSER REMOTE CONDENSER EXCESS PRECHARGED TUBING INSIDE BUIDLING ICEMAKERS SERVICE ACCESS SERVICE ACCESS SIDE AND BACK ROOF CUTAWAY WALL CUTAWAY FM1200R November 1988 Page 8 ...

Page 9: ...e 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 VENT ICEMAKER D...

Page 10: ...the compressor and the fan motor operates whenever the compressor operates Electrical connections are made at the junction box at the back of the icemaker and at the junction box on the remote condenser The remote condenser must be wired to the icemaker 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 pr...

Page 11: ...ed electrician will be required 1 Mount the control box in a convenient location 2 Attach 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 KCMR23...

Page 12: ...ith a volt meter between terminals 2 and 4 then between terminals 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...

Page 13: ...NSULATED PRECHARGED REFRIGERANT TUBING A typical installation should generally appear as illustrated below The remote condenser must be located above the icemaker and the precharged lines installed per the instructions on page 6 FM1200R November 1988 Page 13 ...

Page 14: ...f 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 fro...

Page 15: ...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 if desired the low side pressure can ...

Page 16: ...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 17: ...o includes the reset switch 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 Reset Switch Manual reset When the unit shuts off from the ice discharge chute being overfilled ope...

Page 18: ...y 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 5 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 cl...

Page 19: ...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 FM1200R November 1988 Page 19 ...

Page 20: ...ng 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 press...

Page 21: ...frigerant 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 P...

Page 22: ... 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 23: ... 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 a...

Page 24: ... 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 using a spanner wrench and 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 D...

Page 25: ...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 26: ...g 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 machine trips out on high head pressure replace the head...

Page 27: ...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 28: ...ve the gearbox 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 30 psig stop and look for a leak repair replace the drier evacuate and weigh in the nameplate charge If with added charge the unit does not operate Check for a restricted system replace the drier evacuate and w...

Page 29: ...e restricted defective or not adjusted properly If needed replace the TXV evacuate and recharge per nameplate 4 Check the insulation on the evaporator It should be dry with no wet spots or frost If the insulation has failed replace the evaporator or add extra insulation in the form of foam tape to the evaporator C Check the compressor 1 The compressor may be inefficient a Check the amp draw if low...

Page 30: ...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 rea...

Page 31: ...g 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 the...

Page 32: ...over 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 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 an...

Page 33: ...rt 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 silastic CAUTION Do n...

Page 34: ... 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 To Remove and Repair the Gearmotor Assembly Assuming that the procedures through removal of the water seal have been performed PLACE A BEAD OF FOOD GRADE SEALANT HERE REMOVAL AND REPLACEMENT Evaporat...

Page 35: ...AR OUTPUT SHAFT AND BEARINGS GASKET GEARCASE DRIVE MOTOR BEARING SEAL WATER SHED SEAL REMOVAL AND REPLACEMENT Gearmotor Assembly WARNING Disconnect Electrical Power Before Begining FM1200R November 1988 Page 35 ...

Page 36: ...gether 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 the cover As you lower the cover onto the lower case cover will have to be moved closer to the second gear after the output gear has cleared the second gear top bearing E After the case is together and the locating pins are secure...

Page 37: ...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 38: ...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 FM1200R November 1988 Page 38 ...

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