Scotsman CME1002W User Manual Download

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INTRODUCTION

This manual is intended as a reference for the
installation of a Scotsman ice maker models
CME865 and CME1002.

Table of Contents

INTRODUCTION

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 1

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 2

PRODUCT INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 3

UTILITY CONNECTION LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . Page 4

FOR THE INSTALLER: Environmental Limitations . . . . . . . . . . . . . . . . . . . Page 5

FOR THE INSTALLER: Machine & Bin Assembly . . . . . . . . . . . . . . . . . . . Page 6

FOR THE PLUMBER . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 7

FOR THE ELECTRICIAN: Electrical Connections . . . . . . . . . . . . . . . . . . . Page 8

FOR THE INSTALLER: Final Check List . . . . . . . . . . . . . . . . . . . . . . . . Page 9

INITIAL START UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 10

ADJUSTMENT OF THE TIMER & SWITCH ASSEMBLY . . . . . . . . . . . . . . . . Page 12

COMPONENT DESCRIPTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 13

SERVICE SPECIFICATIONS: CME865W . . . . . . . . . . . . . . . . . . . . . . . Page 16

SERVICE SPECIFICATIONS: CME1002W . . . . . . . . . . . . . . . . . . . . . . . Page 17

CLEANING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 18

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

SERVICE DIAGNOSIS: Ice Level Control Circuit . . . . . . . . . . . . . . . . . . . Page 22

REMOVAL AND REPLACEMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 23

REFRIGERATION SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 26

LIQUID CHARGING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page 27

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

This manual was printed on recycled paper.

This manual contains information on maintenance
and service, keep it for future reference.

Note this symbol where it appears, it marks a
possible hazard.

CME865W & CME1002W

December, 1994

Page 1

Summary of Contents for CME1002W

Page 1: ...ART UP Page 10 ADJUSTMENT OF THE TIMER SWITCH ASSEMBLY Page 12 COMPONENT DESCRIPTION Page 13 SERVICE SPECIFICATIONS CME865W Page 16 SERVICE SPECIFICATIONS CME1002W Page 17 CLEANING Page 18 SERVICE DIAGNOSIS Page 20 SERVICE DIAGNOSIS Ice Level Control Circuit Page 22 REMOVAL AND REPLACEMENT Page 23 REFRIGERATION SERVICE Page 26 LIQUID CHARGING Page 27 Parts lists and wiring diagrams are in the cent...

Page 2: ...base of the machine must NOT be covered by installation material such as a non Scotsman bin top The transducer must have clear access to the ice to be able to sense the ice level Model Number Dimensions W x D x H Basic Electrical Minimum Circuit Ampacity Maximum Fuse Size Refrigerant Charge R 404A CME865WE 32A 30 x 24 x 27 208 230 60 1 14 5 20 36 ounces CME865WE 6A 30 x 24 x 27 30 50 1 36 ounces C...

Page 3: ...serial number plate with the model number serial number and refrigerant charge is located behind the front panel near the control box The unit comes from the factory with the correct refrigerant charge The refrigerant charge information is for recharging should that be necessary All utility connections are made at the back of the ice maker PRODUCT INFORMATION CME865W CME1002W December 1994 Page 3 ...

Page 4: ...UTILITY CONNECTION LOCATIONS CME865W CME1002W December 1994 Page 4 ...

Page 5: ...itations 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 keep the ice maker clean 1 Filter the water used to produce ice Water filters vary greatly in ability and function Install one that filters ou...

Page 6: ... electrician 2 Position the ice storage bin in the selected INDOOR location 3 Level the bin in both the front to rear and side to side directions 4 Inspect the bin top mounting gasket which should be flat with no wrinkles to provide a good water seal when the cuber is installed on top of the bin 5 Install the modular cuber on top of the bin using care to be sure a good seal is made between the two...

Page 7: ...inch fall per foot of horizontal run The drains to be installed must conform with the local plumbing codes Install a vertical open vent on the ice machine reservoir drain The ideal drain receptacle is a trapped and vented floor drain The storage bin drain should be insulated Water Cooled Connection A separate cold water supply is required connect to the 3 8 inch FPT fitting at the back of the cabi...

Page 8: ...d not exceed ten percent of the nameplate rating even under starting conditions Low voltages can cause erratic operation and may be responsible for serious damage to the icemaker Electrical connections are made at the rear of the icemaker inside the junction box All external wiring should conform to the national state and local electrical code requirements Usually an electrical permit and services...

Page 9: ...trical and piping connections been PROPERLY made 7 Are the Master and Compressor switches on OFF 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 Customer Evaluation Warranty ...

Page 10: ...r for recirculation 10 Check that the water cascades down over the cube molds and into the reservoir Note Some spray is normal on new machines 11 When the reservoir is full move the compressor ON OFF switch to the ON position 12 Check operation of the freezing cycle Very shortly ice begins to form in the cube cells and tubing becomes frosted at the top of the evaporator plate Freezing time will be...

Page 11: ... If the operator desires the level of ice in the bin may be adjusted lower to shut off the machine when the bin is only partially full To Test The Ice Level Setting 1 Open the bin door and locate on the bottom of the ice machine the ice level sensor It s in a socket about 2 in diameter and located left of the evaporator plates 2 When the machine is running wait until near the end of a harvest cycl...

Page 12: ...the timer and switch assembly clockwise until the actuator arm on the microswitch initiates the freezing cycle C To adjust the length of the harvest cycle 1 Loosen the adjustment screw on the cam and rotate the shaft of the cam to move the cam 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 i...

Page 13: ...ycle Timer 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 microswitch on the timer controls the power to the plug in rel...

Page 14: ...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 ICE LEVEL SELECTOR SWITCH ON OFF WASH SWITCH PARTIAL FULL THE AMOUNT OF ICE MAINTAINED IN...

Page 15: ...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 that flows over the evaporator plates Above the reservoir but below the evaporators are the cube chutes des...

Page 16: ...t In adjustable between 12 5o F and 24o F 70 50 90 70 110 100 Typical Cycle Time 14 15 minutes 16 17 minutes 23 24 minutes Harvest Time 2 2 3 min standard 2 2 3 minutes needed 2 5 minutes 2 minutes Typical Freeze Cycle Low Side Pressure end of cycle 28 PSIG 29 PSIG 29 PSIG Typical Freeze Cycle Discharge Pressure end of cycle 245 PSIG 245 PSIG 245 PSIG Typical Harvest Cycle Low Side Pressure peak 9...

Page 17: ...Cut In adjustable between 12 5o F and 24o F 70 50 90 70 110 100 Typical Cycle Time 13 14 minutes 15 16 minutes 21 22 minutes Harvest Time 2 2 3 min standard 2 2 3 minutes needed 2 minutes 2 minutes Typical Freeze Cycle Low Side Pressure end of cycle 24 PSIG 24 PSIG 27 PSIG Typical Freeze Cycle Discharge Pressure end of cycle 245 PSIG 245 PSIG 245 PSIG Typical Harvest Cycle Low Side Pressure peak 8...

Page 18: ...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 Switch the Wash Off Ice swit...

Page 19: ... care to wipe all surfaces that are normally in contact with ice 10 Replace the evaporator cover Replace the front panel 11 Move the master switch to ON SANITIZE ICE STORAGE BIN This procedure is to be done monthly 1 Remove and discard all ice from the bin 2 Switch the ice maker off 2 Prepare 2 gallons of an approved sanitizer solution in accordance with the instructions on the package or use the ...

Page 20: ...ard No ice compressor does not run rest of ice machine does 1 Open contactor coil 1 Replace contactor No ice no water over evaporators 1 Water pump does not pump 1 Check replace water pump 2 No water in reservoir 2 Check replace water inlet valve No ice everything runs 1 Too much heat load 1 Check for slow leak thru of water inlet valve 2 Low on refrigerant 2 Check pressures if low find repair lea...

Page 21: ... 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 water reg 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 ti...

Page 22: ...wer to bin level control 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 dis...

Page 23: ...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 CME865W CME1002W December 1994 Page 23 ...

Page 24: ...istributor tubes from the water manifold section To replace the water distributor tubes and manifold tubes reverse the removal procedure BE SURE the notches in the water manifold tubes properly engage the alignment keys in the tee BE SURE the water distributor tube is securely fastened at the notch at both sides of the evaporator plate Check identical attachment for the left water distributor tube...

Page 25: ...connections to the valve 7 Connect the electrical wires to the terminals of the valve coil 8 Weigh in the nameplate charge 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 TXV sensing bulb on the suction line unwrap the in...

Page 26: ...o use 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 fr...

Page 27: ...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 off the manifold valve...

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