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TRANSDUCER

LOCATION

TRANSDUCER

REMOVAL OF TRANSDUCER

PLUG

CONNECTION

TRANSDUCER

SOCKET

REMOVAL AND REPLACEMENT

TRANSDUCER

1. Disconnect electrical power BEFORE removing
transducer.

2. Open bin door and locate the transducer socket.

3. Twist inner portion of transducer counter-
clockwise and push up gently.

4. Pull transducer down until plug connection is
accessible.

5. Unplug transducer and remove from the
machine.

6. Reverse steps 1-5 to reassemble.

CME865R & CME1002R

September, 1994

Page 27

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Summary of Contents for CME1002R

Page 1: ...ge 14 COMPONENT DESCRIPTION Page 15 SERVICE SPECIFICATIONS CME865R Page 18 SERVICE SPECIFICATIONS CME1002R Page 19 CLEANING SANITIZING Page 20 CLEANING Page 21 FREEZING CYCLE OPERATION Page 22 HARVEST CYCLE HOT GAS BYPASS Page 23 SERVICE DIAGNOSIS Page 24 SERVICE DIAGNOSIS Ice Level Control Circuit Page 26 REMOVAL AND REPLACEMENT Page 27 REFRIGERATION SERVICE Page 31 LIQUID CHARGING Page 32 Parts ...

Page 2: ...s a non Scotsman bin top The transducer must have clear access to the ice to be able to sense the ice level See page 5 for location Model Number Dimensions W x D x H Basic Electrical Min Circuit Ampacity Max Fuse Size Refrigerant Charge R 404A CME865RE 32A 30 x 24 x 27 208 230 60 1 16 5 20 336 oz CME865RE 6A 30 x 24 x 27 230 50 1 336 oz CME1002RE 32A 30 x 24 x 27 208 230 60 1 20 5 20 336 oz CME100...

Page 3: ...panel below the control box The unit comes from the factory with the correct refrigerant charge contained in the receiver The refrigerant charge information is for recharging should that be necessary All utility connections and refrigerant line connections are made at the back of the ice maker Before beginning installation be sure that all of the components necessary for complete assembly of the i...

Page 4: ...ERC301 SPECIFICATIONS 23 13 16 19 7 8 ERC Dimensions A B F G 33 3 8 10 3 4 16 3 4 11 5 8 CME865R CME1002R December 1995 Page 4 ...

Page 5: ...erves the right to make design changes and or improvements at any time Specifications and design are subject to change without notice 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 These general recommendations should help...

Page 6: ...pply is interrupted for more than one hour the machine should not be started for at least 4 hours after the power supply has been reconnected to the machine Storage Bin 1 Measure the location of the ice machine floor drain relative to the installed location of the bin Route all drain lines so that when the machine is installed in its normal position the drain tubes terminate just above the floor d...

Page 7: ...s to be installed must conform with the local plumbing codes Use only 3 4 rigid tubing The ice machine s drain must be separate from the bin s drain Both use 3 4 FPT fittings Insulation of the bin drain is recommended Install a vertical open vent on the drain line s high point to ensure proper draining The ideal drain receptacle is a trapped and vented floor drain CONFORM TO ALL LOCAL CODES 3 4 FP...

Page 8: ... 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 access valves that end goes to the ice maker 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 ...

Page 9: ...ine The other end of the discharge line goes to the ice maker fitting marked discharge line 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 th...

Page 10: ... switch the ice maker on at this time make certain the master and compressor switches are OFF when power is connected to the ice maker Power must be connected to the ice maker long enough in advance of start up to allow the crankcase heater to warm the compressor usually about 12 hours Scotsman Condenser Separate electrical connections are made from the ice maker to the condenser as there is line ...

Page 11: ...ical and piping connections been made 7 Are the On Off Wash and Compressor switches set to the OFF position 8 Has power been connected to the ice maker 9 Is the water supply line shut off valve installed 10 Check all refrigerant lines and conduit lines to guard against vibration or rubbing and possible failure 11 Have the bin and cabinet been wiped clean and sanitized 12 Has the Field Quality Audi...

Page 12: ...he reservoir fills and excess water drains out the machine drain At the end of the harvest cycle the water inlet solenoid valve will close and the water fill cycle is complete If the reservoir is not full turn the shaft of the timer clockwise into a new harvest cycle this opens the water valve again The water pump pumps water up to the water distributor at the top of each evaporator plate where wa...

Page 13: ...e harvest time if there is less than 15 seconds of harvest time after the last cube has fallen into the bin Decrease the harvest time if there is much more than 15 seconds of harvest time after the last cube has fallen into the bin Note Harvest time is dependent upon the water and air temperatures at the ice machine Do not adjust harvest time too short as this will cause a freeze up See the next p...

Page 14: ...ve the top part of the assembly More of a gap between the high and low portions will yield more harvest time 2 Tighten the set screw 3 Replace the control box cover and front panel It is important that the length of the harvest cycle allow enough time for all the ice cubes to fall from the evaporator Too short of a time will cause the evaporator to freeze up and stop harvesting ice Too much time w...

Page 15: ...Timer Switch Assembly The timer begins to turn when activated by the cube size control The outer surface or large diameter lobe of the timer cam determines the length of time for finish freezing of the ice cubes while the inner surface or small diameter lobe determines length of the harvest cycle The single pole double throw micro switch on the timer controls the power to the plug in relay coil ma...

Page 16: ...adjustable so that the ice machine will maintain a certain height of ice It will not fill any closer to the ice machine than 8 and will not work if the distance to the bottom of the bin is greater than 8 feet Because it uses sound waves a slight ticking sound can be heard coming from the bottom of the machine THE USER CAN SELECT THE AMOUNT OF ICE TO BE MAINTAINED IN THE BIN ICE LEVEL SELECTOR SWIT...

Page 17: ... is channeled through the water manifold to the water distributors above each evaporator plate and from six holes within each distributor water flows to the cells of each side of the evaporator plates Gravity flow returns the unfrozen excess portion of water to the reservoir for recirculation Reservoir The reservoir located below the evaporators stores the inlet water charge and collects the water...

Page 18: ... at 15 PSIG Cube Size Control Cut In adjustable between 12 5o F and 24o F 0 70 55 90 90 70 120 110 100 Typical Cycle Time 14 15 minutes 15 16 minutes 26 27 minutes Harvest Time 2 2 3 min standard 3 1 4 minutes needed 2 minutes 2 minutes Typical Freeze Cycle Low Side Pressure end of cycle 26 PSIG 28 PSIG 35 PSIG Typical Freeze Cycle Discharge Pressure end of cycle 210 PSIG 235 PSIG 330 PSIG Typical...

Page 19: ... at 15 PSIG Cube Size Control Cut In adjustable between 12 5o F and 24o F 0 70 55 90 90 70 120 110 100 Typical Cycle Time 13 14 minutes 14 15 minutes 25 26 minutes Harvest Time 2 2 3 min standard 3 1 4 minutes needed 2 minutes 2 minutes Typical Freeze Cycle Low Side Pressure end of cycle 25 PSIG 24 PSIG 33 PSIG Typical Freeze Cycle Discharge Pressure end of cycle 210 PSIG 240 PSIG 350 PSIG Typical...

Page 20: ...the reservoir until full 7 Switch the Wash Off Ice switch to wash Let the unit operate for 30 minutes then switch the unit off 8 Drain the reservoir again repeat step 5 9 Switch the machine to wash and continue to add fresh water to flush residual cleaner from the system Switch the Wash Off Ice switch off 10 Sanitize the ice maker and bin see Sanitize Water System 11 Replace the front liner 12 Swi...

Page 21: ...Replace the front panel 11 Move the master switch to ON SCOTSMAN REMOTE CONDENSER 1 Disconnect electrical power at the ice maker 2 Wipe off any surface dust from the intake side of the condenser 3 Vacuum the coil or clean with coil cleaner 4 The coil is clean when light can be seen through the fins 5 Reconnect electrical power SANITIZE ICE STORAGE BIN This procedure is to be done monthly 1 Remove ...

Page 22: ...ill complete an electrical circuit to the timer motor The timer will keep the ice maker operating in the freezing cycle for a selected length of time This will give the ice cubes time to fully form After that selected length of time the timer will switch the ice maker into the harvest cycle through the contacts of the timer assembly micro switch EVAPORATORS DISCHARGE LINE REFRIGERATION SYSTEM SCHE...

Page 23: ...e is energized and OPEN and the water inlet solenoid valve is OPEN The finished ice cubes are released from the sides of each evaporator plate by the warming effect of the hot gas condensing in each evaporator plate and the water cascading over the ice cubes The released ice cubes drop into the ice storage bin below At the end of the harvest cycle the timer cam will push the actuator arm to the mi...

Page 24: ...s not open 3 Check electrical connections to liquid line valve check coil check valve operation 4 Pump down pressure switch does not close 4 Defective switch or liquid line valve does not open or low on refrigerant check replace 5 Thermostatic Expansion valve clogged or does not open 5 Check replace TXV No ice no water over evaporators 1 Water pump does not pump 1 Check replace water pump 2 No wat...

Page 25: ...size wrong 5 Adjust cube size 6 Hot gas valve restricted 6 Replace hot gas valve 7 Not enough water to help harvest 7 Check for restriction of water supply 8 Head pressure too low 8 Check pressure control valve Check for low refrigerant charge Ice maker stuck in harvest cycle 1 Relay coil open 1 Replace relay 2 Timer stuck in harvest cycle 2 Check for power to timer motor if power replace timer if...

Page 26: ...trol board Should be 12 volts from transformer if not replace transformer If there is power go to D D Disconnect electrical power and test ice machine circuit by attaching a jumper wire between bin thermostat posts on circuit board part no 12 1912 01 the circuit board with the timer on it Reconnect power If machine does not start go back to machine circuit If machine starts disconnect electrical p...

Page 27: ...rical power BEFORE removing transducer 2 Open bin door and locate the transducer socket 3 Twist inner portion of transducer counter clockwise and push up gently 4 Pull transducer down until plug connection is accessible 5 Unplug transducer and remove from the machine 6 Reverse steps 1 5 to reassemble CME865R CME1002R September 1994 Page 27 ...

Page 28: ...r distributor tube is securely fastened at the notch at both sides of the evaporator plate Check identical attachment for the left water distributor tube and notch also that the distributor manifold connections at the top center of each evaporator plate is snug against the top of the plate Cube Size Control To remove the cube size control 1 Remove front panel 2 Remove cover from control box 3 Trac...

Page 29: ...ssembly 1 Shut OFF water supply to machine 2 Loosen and remove outlet water line from the inlet water solenoid valve assembly 3 Remove screws and pull the water solenoid valve out to gain access 4 Pull electrical cord from solenoid coil terminals 5 Remove inlet water fitting from the water solenoid valve To replace the inlet water valve assembly reverse the removal procedures ELECTRICAL CONNECTION...

Page 30: ...t sink material 6 Sweat the tubing connections to the valve 7 Connect the electrical wires to the terminals of the valve coil 8 Weigh the nameplate charge into the receiver 9 Replace all panels removed for service 10 Reconnect electrical power Thermostatic Expansion Valve 1 Remove the side service panel and top panel if possible 2 Discharge and recover the refrigerant from the system 3 Locate the ...

Page 31: ... the access valves Remove the cap from the stem use a 3 16 allen wrench to check that the valve is CLOSED The remove the core cap Close the valve and replace the caps when the job is finished The valve must be closed and the caps must be on or the valve will leak General Information Work on the refrigeration system should only be done when it is certain that the system needs repair Refrain from ch...

Page 32: ...he 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...

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