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UTILITY CONNECTION LOCATIONS

CME855A & CME1000A

October, 1994

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Summary of Contents for CME1000A

Page 1: ...nections page 8 FOR THE INSTALLER Final Check List page 9 INITIAL START UP page 10 ADJUSTMENT OF THE TIMER SWITCH ASSEMBLY page 12 REFRIGERATION SYSTEM OPERATION page 13 WATER SYSTEM OPERATION page 14 COMPONENT DESCRIPTION page 15 SERVICE SPECIFICATIONS CME855A page 17 SERVICE SPECIFICATIONS CME1000A page 18 CLEANING page 19 SERVICE DIAGNOSIS page 21 REMOVAL AND REPLACEMENT page 23 REFRIGERATION S...

Page 2: ... ice system are available and are the correct components with regard to model voltage and finish The CME855 or CME1000 will fit Scotsman bin BH800 without needing a bin top Other bins will require a bin top Model Number Dimensions W x D x H Basic Electrical Refrigerant Type Min Circ Amps Max Fuse Size Refrigerant Charge CME855AE 32A 42 x 24 x 27 208 230 60 1 R 404A 15 9 20 36 ounces CME855AE 6A 42...

Page 3: ...UTILITY CONNECTION LOCATIONS CME855A CME1000A October 1994 Page 3 ...

Page 4: ...serves 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 hel...

Page 5: ... cuber on top of the bin using care to be sure a good seal is made between the two cabinets use of a mechanical lift is recommended Align the holes in the bottom back of the cabinet to mate with the two mounting straps on the top rear of the bin 6 Use bolts and straps found in the hardware package to secure the ice machine to the ice storage bin When alignment and leveling are completed tighten th...

Page 6: ...ezing compartment 3 Lift the top unit onto the bottom machine a mechanical lift is recommended 4 Align the two machine s cabinets and using the bolts and straps from the hardware package fasten the two units together at the back Note When placing a new unit on a CM855 or CM1000 the outboard right side viewed from the back threaded holes should be used 5 Route the bin thermostat capillary tube from...

Page 7: ... plumber will be required CONFORM TO ALL LOCAL CODES Drain Connections Connections All drains are gravity type and must have a minimum of 1 4 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 sh...

Page 8: ...n percent of the nameplate rating even under starting conditions Low voltages can cause erratic operation and may be responsible for serious damage to the ice maker Electrical connections are made at the rear of the ice maker inside the junction box All external wiring should conform to the national state and local electrical code requirements Usually an electrical permit and services of a license...

Page 9: ...de 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 and Warranty Registration form been properly filled out...

Page 10: ...old and into the reservoir 10 When the reservoir is full move the compressor ON OFF switch to the ON position 11 Check operation of the freezing cycle The compressor is operating The ice making process begins feeling the metal parts of the evaporator plate reveals cold temperature very shortly ice begins to form Tubing will become frosted at the top of the evaporator plate After the first cycle fr...

Page 11: ... 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 page for detailed harvest time adjustment instructions 14 Check BIN THERMOSTAT With the ice maker in the harvest cycle hold ice against the metal tube of the bin thermostat bracket The ice machine will shut off only at ...

Page 12: ...e event B To start the FREEZING CYCLE Slowly rotate the shaft of 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 ...

Page 13: ...stributor and into the three evaporators Inside the evaporators the liquid refrigerant rapidly expands because it has moved from a high pressure zone to one of much lower pressure The heat from the water going over the evaporators keeps the refrigerant expanding and the refrigerant absorbs this heat This causes the evaporators and the water going over them to loose heat The refrigerant then flows ...

Page 14: ... through manifolds and then cascades down the evaporator surface by gravity As it flows across the refrigerated evaporators some of the water will be chilled enough to change form turn to ice and stay frozen to the evaporator Most of the water returns to the reservoir to be sucked back into the pump and re pumped over the evaporators Water is forced over the evaporators during the freeze cycle to ...

Page 15: ...rol is as the end of the harvest cycle 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 con...

Page 16: ...ugh 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 that flows over t...

Page 17: ...in into freeze 8 9 in harvest 8 3 Compressor CS14K6E Water Inlet Valve Flow Rate 75 g p m Cube Size Thermostat Cut in adjustable between 0o F and 24o F Bin Thermostat CI 38 5o F to 43 5o F CO 33 5o F to 38 5o F Thermostatic Expansion Valve Not adjustable 70 50 90 70 Typical Cycle Time 14 15 minutes 17 18 minutes Harvest Time 22 3 minute standard 22 3 minutes 2 minutes Typical Freeze Cycle Low Side...

Page 18: ...n into freeze 10 7 harvest 11 8 Compressor CS18K6E Water Inlet Valve Flow Rate 75 g p m Cube Size Thermostat Cut in adjustable between 0o F and 24o F Bin Thermostat CI 38 5o F to 43 5o F CO 33 5o F to 38 5o F Thermostatic Expansion Valve Not adjustable 70 50 90 70 Typical Cycle Time 11 12 minutes 13 14 minutes Harvest Time 22 3 minute standard 22 3 minutes 2 minutes Typical Freeze Cycle Low Side P...

Page 19: ...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 20: ...torage bin taking 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 pa...

Page 21: ... machine does 1 Open contactor coil 1 Replace contactor 2 Thermostatic Expansion valve clogged or does not open 2 Check replace TXV 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 pr...

Page 22: ... 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 23: ...er 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 and notch also that the dist...

Page 24: ...ve 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 insulation and remove the bulb from the clamp 4 Cut out or unsweat the old TXV from t...

Page 25: ...e 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 c...

Page 26: ...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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