CME650 - Scotsman Ice Systems
Contents
1. Charge HP62 Ampacity circuit breakers R 404a CME650AE 32A 30 x 24 x 27 Air 208 230 60 1 13 6 20 36 ounces CME650WE 32A 30 x 24 x 27 Water 208 230 60 1 12 7 20 26 ounces CME650AE 3A_ 30 x 24 x 27 Air 208 230 60 3 6 6 15 36 ounces CME650WE 3A 30x 24x27 Water 208 230 60 3 5 8 15 26 ounces CME650AE 6A_ 30 x 24 x 27 Air 230 50 1 n a n a 36 ounces CME650WE 6A 30x 24x27 Water 230 50 1 n a n a 26 ounces August 1994 Page 2 For The Installer Environmental Limitations The ice machine must be installed indoors in a controlled environment Minimum Maximum Air Temp 50 F 100 F Water Temp 40 F 100 F Water Pressure 20 PSI 80 PSI Voltage 198 253 Operating the ice machine outside of the above limitations or outdoors is potentially damaging to the machine and it is misuse of the machine This may void the warranty Scotsman Ice Systems 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 changes and or improvements at any time Specifications and design are subject to change without notice Airflow on air cooled models is ntake through the right side2. ATC STI ONT DO NOT use ice cubes produced from the cleaning or sanitizing solutions Be sure none remain in the bin MTT 18 Pour hot water into the storage bin to melt the cubes and also clean out the bin drain 19 Wash the bin liner with a solution of household bleach 1 ounce of bleach to 2 gallons of water and warm 95 F 115 F water Allow to air dry 20 The unit will now continue automatic operation Water Distributor Note The water distributor may need to be cleaned separately 1 Remove evaporator cover 2 Remove water distributor assembly by pushing the assembly to the right until the left end clears the retaining tab Removal of Water Distributor Water Distributor Retaining Tab 3 Lift up the left end of the water distributor assembly and pull the assembly to the left 4 Un snap the water distributors from the T and inspect for mineral deposits Clean as required 5 Reverse above steps to reassemble Be certain that water distributors are in place and secure Scale that may form on the plastic liner can be removed by scrubbing the surface with a mixture of Scotsman Ice Machine Cleaner and hot water Remove any scale prior to cleaning August 1994 Page 14 CME650 Refrigeration Schematic o Z S Freeze Cycle Water Schematic From the compressor hot discharge gas is Water flows into the ice machine from its inlet pumped to the condenser either air or water connectio
3. as Gin LL 41 98 225 possible 15 minutes maximum TOEREN 43 100 232 e Special leak detection equipment is required to 12 46 102 239 locate small refrigerant leaks Usually a leak 14 48 104 246 detector capable of detecting a Halogenated 16 50 106 253 refrigerant or HFC 134a will work Check with 18 53 108 260 the leak detector manufacturer if in doubt ol 55 410 268 Do NOT mix with air for leak testing DO ele ne nr 58 1412 275 A eee Shed 60 i P Se ak ed 283 20 sh ee ase 63 TIO 291 283 fe EG 66 TABS se Se 299 30h ee Es 69 120 307 B25 eb ka elk 72 22 ia Sky 316 BAS Fis e sh AA 75 L OS 324 3O oy aiy 78 126 on be es 333 BB aar aa ayt 81 128 ai a ames 342 AO 68 Ronis 85 130 351 ee 88 AIZ Beet eo 360 AA ees debi 91 eE fe eles 370 AG rr 95 136 379 IB yam Son fe 99 138 aoe kere 389 50 ee a 102 140 a ees 399 52 ae a 106 142 se ees 409 oe ee rar 110 TAA ae ar ae ee 420 56 i Goa 114 146 430 Dga a ae 118 148 e ear Bok 441 60a ee ace 123 150 452 625 ei eet 127 152 464 BAN aise h 2k 132 TOA a fie 475 66 2 bk eles 136 156 2 2 487 68 ee ae 141 158 ok ue ae 499 August 1994 Page 22 REFRIGERATION SERVICE General Scotsman recommends that any work on the refrigeration system only be done when it is certain that the system needs repair Use conservation minded service procedures Refrain from
4. bin or bucket and switch the master switch ON until reservoir is empty of water Replace hose on inlet 6 Replace evaporator cover Scotsman Ice Machine Cleaner contains acids These compounds 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 AWARNING 7 Mix 8 ounces of Scotsman Ice Machine Cleaner with 1 gallon of warm 95 F 115 F water and pour into the reservoir until full 8 Switch the master switch ON and operate the unit for 20 minutes then switch the unit OFF 9 Repeat steps 4 and 5 10 Wash the plastic and stainless liners of the freezer section with a solution of household bleach 1 ounce of bleach to 2 gallons of water and warm 95 F 115 F water Allow to air dry 11 Pour 1 2 gallon of the solution mixed in step 10 into the reservoir Replace the evaporator cover 12 Switch the master switch back ON operate the unit for 5 minutes Switch unit OFF 13 Repeat steps 4 5 and 6 14 Pour about 1 2 gallon of clean potable water into the reservoir and switch the master switch ON After 5 minutes switch the master switch OFF and repeat steps 4 5 and 6 15 Switch master and compressor switches ON 16 Replace the front panel 17 Discard the next batch of cubes to make sure all of the acid amp sanitizer is gone
5. grill Exhaust through the left side grill Do not install where this air flow is obstructed A clearance of 6 inches is required at the back and sides October 1994 Page 3 CME650 CME650 Installation Water The water supply for this ice machine has been in contact with many materials since it fell from the sky as rain All rain is slightly acidic and tends to dissolve the materials it comes in contact with During water s journey to the ice machine it has flowed over and through the ground been picked up by a municipal or private pump forced through a series of pipes of differing construction and may have been treated by the municipality providing the water The water supplied to this ice machine will then contain a variety of substances that will likely show up as solids during the ice making process These solids are similar to those found when water is boiled out of a saucepan Only the water boils away and the minerals that were in the water solidify in the pan During ice making only the water is frozen into ice the minerals stay behind in the reservoir This machine pumps out the water in the reservoir every cycle to minimize the amount of minerals in the water system but after time the minerals will appear and have to be dissolved by ice machine cleaner then flushed away during the cleaning process An ice machine is a food manufacturing plant it takes a raw material in this case water and transforms it i
6. maker cabinets 4 Secure the top unit to the bottom one with the hardware and straps shipped with the upper machine 5 Locate and uncoil all of the bin thermostat capillary tube 6 Route the bin thermostat capillary tube from the upper unit through the hole in the back of the reservoir through the lower unit and into the bin thermostat bracket Discard upper unit bracket October 1994 Page 5 Bin Thermostat Installation Thermostat Capillary Tube Bin Thermostat Bracket a Stacking CME650 Installation For The Plumber 1 Connect cold potable water to the 3 8 male flare at the back of the cabinet A water filter is recommended Flush the water line prior to connecting to the ice machine If water cooled connect a separate water inlet line to the water cooled condenser inlet fitting It should also have a hand shut off valve A loop of copper tubing may be used between the ice machine and the water supply This will allow the ice machine to be pulled out from its installed location without disconnecting the water line No back flow preventer should be needed in the inlet potable water line because provision for that is incorporated in this N S F listed product the tube from the inlet water valve has an air break in it is above the reservoir wall and cannot siphon 2 Connect a drain tube to each drain The drain tubes from these connections must be run separately There are tw
7. recycle refrigerant The method chosen is up to the service company 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 Wrench aoe CME650 spec 700 88 Reclaim programs are available through most refrigerant wholesalers Access Valves To use the access valves Remove the cap from the stem of the valve then use a 3 16 allen wrench to check that the valve is closed The core cap may then be removed Close the valve and replace the caps when the Torque Stem Cap to 8 12 ft Ib Torque Stem to 6 8 ft Ib Tore Sore Cap to 7 12 ft Ib Allen Access Valves Note There are no Schrader valve cores in the valve job is finished The valve must be closed and the caps must be on or the valve will leak October 1994 Page 23 CME650 Removal and Replacement Refrigeration System If the refrigeration system must be serviced the quality of service must insure that there will not be a repeat failure as repeat failures will cause refrigerant to be discharged into the air by the failure or when the failure is corrected e f there has been a compressor burn out check for acid in the oil If acid is indicated extra steps must be taken to clean up the system e Never use refrigerant to clean up or flush out a refrigeration system When system clean up is required the use of s
8. the cam clockwise until the timer is in the Harvest Position 6 Switch the compressor switch to OFF 3 Locate the ON OFF switch switch it to ON 4 The inlet water valve will open and water will flow into the reservoir The water pump will begin to pump water over the evaporators 5 Allow the reservoir to fill 6 Switch the compressor switch to ON 7 On air cooled models the fan motor will begin to turn and warm air will be discharged from the left side of the ice machine On water cooled models ee py ee warm water will begin to flow from the condenser drain Note To optimize the balance between ice production and water use the water cooled discharge pressure must be 245 P S I G Check 1 l discharge pressure and adjust water regulating valve to obtain 245 P S I G discharge pressure 8 The water temperature in the reservoir will soon be 32 F and ice should begin to form on the evaporators Note In some cases some slush will form in the reservoir This is temporary and normal 9 Allow the ice machine to operate for about 18 minutes The ice should be fully formed and should be harvested within a few minutes 10 After harvest check the ice cube size If needed adjust the cube size by rotating the adjustment knob of the cube size control Rotate it bibesToo 1 8 turn clockwise to make the cubes thicker and Thin rotate it 1 8 turn counterclockwise to make the cubes thinner wie i The machine
9. 0 Installation Assembly 1 Attach the legs or optional casters onto the ice storage bin Units that are stacked should only use legs not casters 2 Place the ice machine onto the storage bin 3 Line up the ice machine check that there is a good seal between the ice machine and the storage bin 4 If on a Scotsman bin attach the ice machine to the bin using the straps and bolts shipped with the ice machine If on another brand bin follow the directions included with that bin Bin Thermostat Installation 1 Remove rubber cap from the end of the thermostat bracket 2 Attach the bin thermostat bracket to the bottom of the ice machine using the thumb screws provided There are pre drilled and tapped holes located just behind the cube drop area The end of the bin thermostat bracket with the plastic tubing on it will fit into the hole in the base of the machine 3 Locate and uncoil a portion of the bin thermostat capillary tube Route the end of the capillary tube into and through the bin thermostat bracket tube It should be inserted the full length of the tube but not past the end Stacking This machine will stack onto any CM250 CME250 CM450 CM500 CME500 CM650 or CME650 with the same cabinet depth 24 1 Remove and discard the top panel from the lower unit 2 Carefully lift the uncrated top unit onto the bottom unit Use of a mechanical lift is recommended for this step 3 Align the two ice
10. IX Restore power Unit off due to master switch in OFF position Switch master switch to ON Unit off due to bin thermostat open Check temperature at bin thermostat bracket if warmer than 40 F thermostat should be closed Adjust replace thermostat Unit off due to hi pressure cut out open Reset and check for dirty condenser hot location or water interruption if water cooled Unit off due to hi temperature cut out open Hot gas valve leaking thru replace hot gas valve Unit off due to circuit board open Check for short circuit and replace circuit board No ice is made No water due to water turned off Reconnect water supply No water due to water filter plugged Replace water filter No water due to inlet water valve screen plugged Clean out inlet screen No water due to strainer screen Clean out inlet screen plugged No water due to Inlet water valve Replace valve coil open No water due to inlet water valve Replace valve will not open Water in reservoir but no water over evaporators Water pump does not work replace pump No cooling at evaporator due to compressor switched off Switch compressor on No cooling at evaporator due to too much heat load because inlet water valve leaks thru Replace inlet water valve No cooling at evaporator due to hot gas valve leaking thru Replace hot gas valve No cooling
11. Introduction CME650 To the owner or user This service manual is intended to provide you and the maintenance or service technician with the information needed to install start up clean maintain and repair this product The CME650 is an ice machine that produces cubed ice on 4 vertical cube freezing surfaces The ice falls as vertical strips of cubes into the ice storage bin where they break up into individual cubes The CME650 automatically maintains the level of ice by turning on when the ice level falls and switches off when the bin is full The refrigeration system uses HP62 as the refrigerant HP62 models use polyolester refrigerant oil Information on HP62 is located on page 22 Table of Contents Specifications Limitations Installation Plumbing Electrical Final Check List Component Location Initial Start Up Electrical Sequence Cleaning Water Refrigeration Schematic Technical Characteristics Service Diagnosis Removal and Replacement Parts lists and wiring diagrams are located in the center of this manual printed on yellow paper Note the warning symbol where it appears in this manual It is an alert for important safety information on a hazard that might cause serious injury AWARNING Keep this manual for future reference This manual was printed on recycled paper October 1994 Page 1 CME650 Specifications Information regarding Model Number Serial Number Ampacity and Maxi
12. and the capillary tube routed thru the bracket 11 Has the bin and cabinet been wiped clean and sanitized 12 Has the Customer Evaluation amp Warranty Registration form been properly filled out Check for correct model and serial numbers from the nameplate then mail the completed form to Scotsman 13 Has the owner user been given the name and telephone number of the authorized Scotsman Service Agency serving that location August 1994 Page 8 CME650 Component Location o gt SSS The ice machine is designed for front service Many components are serviceable from the front without removing the side panels Behind the front panel Water pump Inlet water valve Reservoir Evaporators Waiter distributor Control box with cube size control adjustment ON OFF switch Compressor switch Inside the control box is control system for the ice Drain Trough machine Timer Cube Size Control cA Master Switch Water Compressor Switch Distributors 5 ya io Bin Thermostat Control Box Overflow Standpipe Water Pump Bin Thermostat Bracket Component Location Water Inlet aiye October 1994 Page 9 CME650 Initial Start U After the final check list has been gone through the ice machine may be started up Timer 1 Open the water shut off valve 2 Switch on the electrical power 2 Remove the front panel 4 Remove the control box cover rotate
13. at evaporator due to fan not turning Check amp replace fan motor or fan control switch No cooling at evaporator due to dirty condenser Clean condenser August 1994 Page 18 CME650 Service Diagnosis SYMPTOM POSSIBLE CAUSE PROBABLE FIX No ice is made No cooling due to low refrigerant Locate leak recover remaining charge refrigerant replace dryer evacuate and weigh in nameplate charge Will not harvest due to hot gas Check for voltage to coil in valve not opening harvest if there is voltage check coil if coil is ok replace hot gas valve No cooling due to compressor not Check compressor for voltage operating continuity and operation Replace if found to be faulty Will not harvest due to not Adjust harvest time longer enough harvest time Will not harvest due to lack of Check water supply amp distribution water system Clean water system with Scotsman Ice Machine Cleaner Makes ice but very little High discharge pressure due to Check for causes of high dirty condenser faulty fan motor discharge pressure and correct fan pressure switch not enough water thru water cooled condenser Inlet water temperatures and Advise user suggest additional room ambient very high room cooling Compressor inefficient Check replace compressor Cubes are wrong size shape Cube size control not adjusted Adjust cube size control proper
14. binet once a week with soap and water Wash off the bin door frame and gaskets daily Sanitize the bin interior once a month Clean the water system and air cooled condenser a minimum of twice per year If in an area of high mineral concentration in the water supply clean water system 4 times a year This ice machine will perform at its best when kept clean There are two areas to keep clean The water system including the water reservoir distributor tube and evaporator surface and the air cooled condenser filter and the condenser itself Inlet Water Valve Screens If a restriction of incoming water is suspected the screen on the inlet side of the water valve should be inspected amp cleaned Some models also have a strainer in the water line the strainer screen should also be inspected for restricting minerals Inlet Water Valve Inlet Screen Air Filter air cooled only 1 Remove the grill on the right side of the unit 2 Remove the filter pad from in front of the condenser 3 Wash the surface of the filter off with cold water or if torn or so dirty it can t be cleaned replace with a new filter 4 Return the filter to its installed position 5 Replace the grill Do not operate the unit without the filter in place Note If the unit has been operated without the filter in place the fins of the condenser will become fouled with dirt and must be cleaned A vacuum cleaner with a soft brush attachm
15. checking refrigeration pressures without reason There are many ways to determine the proper operation of a Scotsman ice machine without using refrigerant gauges Visual inspection of the water system observation of the ice formation amp draw voltage and other techniques will lead to proper diagnosis Scotsman also recommends that at the time of initial start up gauges not be used Refrigerant should not be added except as a way to determine the proper operation of the product If the system was low on refrigerant there is a leak and it must be found and repaired Refrigerant should not be wasted to the atmosphere This system has a critical charge it must be recharged with the correct amount of refrigerant as listed on the nameplate of the ice machine or performance will suffer Anytime the refrigeration system has been opened the dryer should be replaced Note Only a HFC type dryer should be used When brazing the tubing connections to the hot gas valve the component must be protected by heat sink material eif gauges must be used do not always check the high side pressure If the condenser is clean and seems to be operating correctly it most likely is The low side pressure is much more important on an ice machine than is the high side e f gauges must be used use very short hoses Minimal refrigerant discharged into the hoses equals minimal refrigerant discharged into the air Recover reclaim or
16. ent will extract most loose dust stuck to the surface of the condenser fins If there is any doubt about dirt inside the fins of the condenser the cabinet should be removed and a qualified service agent should clean the condenser Water cooled units The water cooled condenser may over time and under certain water conditions become internally restricted by minerals These will have to be dissolved by acid or the condenser replaced Only a qualified service agent should attempt this type of service August 1994 Page 12 CME650 Cleaning Ice Storage Bin The interior liner of the bin is in contact with a food product ice The storage bin must be cleaned regularly to maintain a sanitary environment Every 30 days the liner should be sanitized with a commercial ice machine sanitizer according to the directions of the sanitizer or with a solution of household bleach and water 1 Mix the bleach and water using the ratio of two ounces of bleach to two gallons of water 2 Wipe all interior surfaces of the ice storage bin with the bleach and water 3 Allow to air dry Note If the ice baffle was removed from the bin during cleaning it must be reinstalled in the bin To Remove Scale 1 Mix a cleaning solution of 4 ounces of Scotsman Ice Machine Cleaner to 4 pints of hot 95 F 110 F water 2 Using rubber gloves dip a nylon scouring pad into the cleaning solution and scrub the scale off the liner 3 Afte
17. erted in a socket attached to the suction line Pull it out of the socket 10 Replace the cube size control with the proper part number following the above steps from 9 1 Replacement of Cube Size August 1994 Page 20 Removal and Replacement CME650 Water Pump The pump provides the force to move the water from the reservoir to the freezing surface The pump does not need oil but if it becomes noisy overheats or will not pump it should be replaced Be certain to confirm electrical faults with a voltmeter or ohmmeter before replacing the pump The pump should be operating whenever the compressor is 1 Unplug or disconnect the electrical power AWARNING Electrical shock hazard Electrical shock can cause personal injury Disconnect power before beginning to service components 2 Unplug the pump from its connection 3 Loosen the two fasteners holding the bracket to the wall 4 Pull discharge hose from pump discharge port Replacement of Water j 5 Pump ey 5 Remove pump from ice machine 6 Remove bracket from pump 7 Reverse above steps to replace Inlet Water Valve The valve water to enter the reservoir during harvest but not during freeze The valve may plug up from minerals in the water and may be cleaned rather than replaced 1 Shut off the water supply 2 Unscrew the fitting at the back of the valve and pull the water inlet tube out of the valve body 3 Remove
18. ir cooled 90 F air 70 F water 30 PSIG Water cooled 28 PSIG Typical Freeze Cycle Air Cooled Discharge Pressure 300 350 PSIG 90 F air and 70 F water 260 290 70 F air and 50 F water Refrigerant Charge Air cooled 36 ounces R 404A Water cooled 26 ounces R 404A Harvest Time Pre set at 2 and minutes Adjustable to match field requirements Typical Low Side Pressure in harvest e Air cooled 80 90 PSIG Water cooled 85 PSIG Water Cooled Discharge Pressure in freeze 245 PSIG Hi Pressure Cut Out Point e 450 PSIG air cooled 400 PSIG water cooled Fan Pressure Switch e 240 PSIG C I 190 PSIG C O Hi Temperature Cut Out Point e 140 F at hot gas valve Typical Compressor Amp Draw single phase e 7 9 during the freeze cycle and 9 11 during the harvest cycle Compressor Copeland CS12K6E PFV single phase or CS12K6 TF5 three phase Oil charge included with compressor 43 ounces of Polyolester oil Water Inlet Valve Flow Rate 75 g p m Cube Size Thermostat Adjustable Cut In as needed to obtain correct cube size C I range between 12 F and 6 F Bin Thermostat Adjustable C l range between 38 5 F and 43 5 F C O range between 33 5 F and 38 5 F Thermostatic Expansion Valve Not Adjustable October 1994 Page 17 CME650 Service Diagnosis SYMPTOM No ice is made nothing operates POSSIBLE CAUSE Unit off due to no power PROBABLE F
19. is designed to only harvest cubes that are the correct thickness August 1994 Page 10 5 Locate the timer and Control Box Timer Shown In Harvest Position A Harvest t i fa Cube Size Freeze Pa Control Knob S4 es wR Cubes Too ye Thick a Pi Bin Thermostat i Correct Size amp Shape Ice batch weight per cycle will be about 5 5 Ib Initial Start U CME650 11 Check harvest time The machine will have to harvest all of the cubes before it goes back into the freeze cycle Timer Cam Follower Timer Shown In Harvest Position Jo Harvest i in O gt Freeze Jf Increase the Harvest Time if there is less than 15 seconds of harvest time after the last cube has fallen into the bin The machine ships set at 2 23 minutes of harvest time 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 Colder air and water will result in faster ice making but longer harvest cycles Do NOT adjust harvest time too short as this will case a freeze up of the evaporators To Adjust Harvest Time 1 Disconnect electrical power 2 Locate time cam in control box 3 Loose set screw holding the two halves of the cam together and rotate the front half to increase or decrease the harvest portion of the cam low part 4 Re tighte
20. l connections are made at the rear of the ice maker inside the junction box Recommendation If using wire nuts cut off the tinned ends of the wires and strip off 1 2 of insulation from the end of the wires so there is a copper to copper connection Follow All Local Codes This Unit Must Be Grounded Usually a licensed electrician will be required to connect the electrical service Hand Disconnect Switch ca Lone Junction Box October 1994 Page 7 CME650 CME650 After Utility Connections 1 Level the cabinet use the leg levelers on the end of the legs to adjust the cabinet height Legs should have been installed when the bin was unpacked 2 Wash out the bin If desired the interior of the bin could be sanitized Final Check List 1 Is the ice maker cabinet in a room where ambient temperatures are within the minimum and maximum temperatures specified 2 Has the water supply been connected 3 Is the water pressure adequate 4 Have the water connections been checked for water leaks 5 Have the drain connections been made 6 Have the drain connections been checked for leaks 7 Is the cabinet level 8 Is the ice machine connected to a 208 230 volt electrical power supply and is the ice machine the only load on that circuit 9 Has all of the shipping material been removed from the inside of the cabinet 10 Has the bin thermostat bracket been attached to the bottom of the ice machine
21. ly Water system is restricted with Clean water system with minerals Scotsman Ice Machine Cleaner Not enough water Check water supply pressure Check water supply for restrictions Ice fused together in bin Ice in bin too long Advise user to pour water on ice to ease removal Too many minerals in water Suggest water treatment to user Water drips on ice Waiter distributors loose Set water distributors in place on top of evaporator Some water is normal Advise user Cube size too small Adjust thicker Water system is dirty Clean water system with ice machine cleaner October 1994 Page 19 CME650 Removal and Replacement Cube Size Control Before replacing the cube size control it should be positively determined that it is at fault If it does not open when warm replace it 1 Disconnect electrical power AWARNING Electrical shock hazard Electrical shock can cause personal injury Disconnect power before beginning to service components Cube Size Pig Tail Socket 2 Remove the front panel 3 Remove the control box cover 4 Locate the cube size control 5 Remove the two screws holding the control to the control box and lift the control out 6 Pull the two wires off the posts of the cube size control 7 Follow the capillary tube of the cube size control and remove it from the grommet in the back of the control box 8 Locate bulb on suction line 9 The end of the cube size control is ins
22. mum Fuse Size are located on the nameplate of the ice machine The model number serial number and refrigerant charge are also listed on the serial number plate just behind the front panel MODEL NUMBER Serial Number Plate If recharging always use the charge listed on the ice machine s 16 2 CM MIN UTILITY CONNECTION PLAN VIEW AIR VENTILATION MIN AIR VENTILATION CME650 Cabinet The CME650 will stack onto a variety of ice storage bins see sales literature for proper ice 7 0 cm storage bin Examples of bins this machine will fit 2 88 IN 12 84 IN 3 00 IN FRONT are i e BH550 HTB500 HTB350 HTB250 e BH800 with bin top KBT23 e BH900 with bin top KBT22 Loe ane BH1360 Sue ORAIN It will also fit these Scotsman Dispensers ao CD200 Ja 1S150 with KADCM1 RS150 with KADCM1 These smaller bins are recommended MIN a 10 01 see GM i CUBE OPENING 15 2 CM 6 00 IN 15 2 CM 6 00 IN ELECTRICAL INLET CONDENSER INLET WATER COOLED ONLY 1 0 CM 3 8 IN F P T s 18 3 CM 7 22 IN CONDENSER DRAIN WATER COOLED ONLY rain FPT 28 9 cm There is an optional stainless steel panel kit EIN SPKCMD 1 for this machine BACK VIEW Specifications Model Number Dimensions Condenser Basic Minimum Maximum Fuse Refrigerant W x D x H Type Electrical Circuit Size or HACR
23. n at the back of the cabinet through the cooled inlet water valve and into the reservoir The water in the reservoir is pumped up and through the water distributor tube at the top of the evaporators From there the water flows over both sides of the evaporators and back into the reservoir Melted ice and water spills into the bin flow through a drain in the base of the bin to the exterior drain connection at the back of the cabinet At the condenser heat from the refrigerant flows into the cooling medium either air or water and the refrigerant condenses into a liquid From the condenser the liquid refrigerant flows through the liquid line to the metering device a thermostatic expansion valve At the expansion valve the liquid refrigerant passes from a high pressure zone to one of relatively low pressure and in the low pressure zone it evaporates The low pressure zone where the refrigerant evaporates is the evaporator When the refrigerant evaporates it absorbs heat from the metal parts of the evaporator and the water flowing over it From the evaporator the refrigerant flows back to the compressor through the suction line Suction Line Water Distribution Hot Gas Valve System Liquid Line Evaporator z ili Condenser w J ieee ee Hot Gas Fan Motor ater TT i SEA Y Vave a COTTI TITE P wa Filter Inlet NETTEN G A a A N F E N E E N EF c af Thermo Exp Valve Water Reservoir Di
24. n the set screw 5 Reconnect power and check cube size of the next cycle as it may require adjustment after the harvest time has been set 12 Check operation of the bin control circuit by holding ice on the bin control tube in the bin This simulates bin full and the ice machine should switch itself off at the end of a harvest cycle 13 Replace all the panels The ice machine is now ready for automatic operation Electrical Sequence This describes the sequence through a complete cycle Freeze Cycle During the first part of the freeze cycle the ice machine compressor fan motor if air cooled and water pump are operating The relay in the middle of the circuit board is energized Timed Freeze Cube size control closes connecting power to the timer motor and after a few 4 5 5 5 minutes this timer opens the circuit to the relay on the circuit board This starts the harvest cycle Harvest In the harvest cycle the water pump and compressor stay operating and these two valves are energized Hot gas valve Inlet water valve The unit stays in the harvest cycle until the timer has turned the cam which has pushed the timer micro switch button IN If the bin thermostat is OPEN the ice machine will stop If the bin thermostat is CLOSED the relay will energize and the unit will make another batch of cubes October 1994 Page 11 CME650 Maintenance and Cleanin Cleaning Schedule Scrub the outside of the ca
25. nto a food product ice The purity of the water is very important in obtaining pure ice and in maximizing product life The water to the ice machine should be filtered Water filters vary greatly in ability and function Install one that filters out suspended solids to a dimension of 5 microns or less The finer the filter the better but finer filters may plug up sooner than course ones It may be necessary to add a course filter ahead of the fine filter to prolong filter life Have the water tested Acidic water or alkaline waiter will both cause corrosion Dissolved solids cannot be filtered out Check with a water treatment specialist regarding testing treatment and filters Air cooled models blow air in and out through the grills at the sides in the right and out the left Space is required for air flow at the sides and utility connections at the back The ice machine is not designed for outdoor use It must be installed indoors ina controlled environment The air and water temperatures must not exceed rated limits Pre installation 1 Inspect the place where the ice machine is to be installed Check for space for the cabinet water supply drain availability and electrical power supply No extension cords are allowed The building drain inlet must be lower than the drain outlet of the ice bin The water supply must have a hand shut off valve accessible when the unit is installed August 1994 Page 4 CME65
26. o connections one is the bin drain and the other is the reservoir drain The reservoir drain is a 3 4 F P T brass fitting 3 8 Male Flare Water Inlet Water Shut Off Valve az Reservoir Drain 3 4 FPT Must Be Vented Bin Drain May Be Routed From The Bottom On Some Model Bins Fitting May Be Plastic DO NOT OVERHEAT Drain tube material must be rigid and meet local code Traps in the bin drain line without vents ahead of them will cause poor draining The bin drain must be vented if there is a long horizontal run 5 or more The reservoir drain must be vented and not connected to the bin drain All drains are gravity and must have a minimum fall of 1 4 per foot of horizontal run The water cooled condenser drain is not vented and is routed separately Maintain the air gap required by local code between the end of the drain tubes and the building drain receptacle Note Drain tubing should be insulated to prevent condensation from forming on the tubing CONFORM TO ALL LOCAL CODES 1 2 FPT Outlet Water Cooled Condenser Plumbing Connections Ice Storage Bin Typical _ Water Supply and Drain Connections August 1994 Page 6 Installation For The Electrician This unit must be on a separate power supply The maximum fuse size for this circuit is listed on the nameplate and per the nameplate use fuses or HACR circuit breakers Electrica
27. r the scale has been removed rinse all surfaces inside the bin with clean potable water Stainless Steel Components Inside Bin The stainless steel parts in the bin also require periodic cleaning Chemicals in the water supply such as chlorine cause brown stains to appear on the surface of the stainless steel parts 1 General Cleaning staining is usually removed by washing the parts with ordinary cleaning powder such as Bon Ami or Copper Glo and water After cleaning rinse with clear water 2 Water treatment The chlorine enters the machine from the municipal water supply It can be removed from the water supply by using a charcoal or activated carbon water filter to treat the water to the ice machine If staining is severe filters of this type are recommended Exterior Cabinet Cleaning The exterior cabinet may be cleaned by scrubbing with soap and water Do not use cleaners containing petroleum products Anylon type brush may be used to scrub stubborn deposits October 1994 Page 13 CME650 Cleaning Ice maker 1 Remove front panel 2 Remove control box cover and turn the timer cam clockwise until the unit is in a harvest cycle At the end of the harvest cycle switch the master and compressor switches to OFF Replace the control box cover 3 Remove all ice from the bin 4 Remove 4 thumbscrews and the evaporator cover 5 Remove water pump discharge hose from evaporator water inlet direct hose into
28. scharge Line Compressor Dryer Refrigeration Schematic October 1994 Page 15 CME650 Harvest Cycle During the harvest cycle the refrigerant flows from During the Harvest Cycle the inlet water valve the compressor through the discharge line toa opens filling the reservoir and allowing the branch in the line containing the Hot Gas Valve reservoir to overflow the drain This valve is Open during the harvest cycle allowing the hot discharge gas to bypass the condenser and enter the evaporator at its inlet The hot discharge gases warm up the evaporator enough to allow the surface of the ice frozen to the evaporator to melt The remaining ice will then fall off into the bin Hot Gas Valve OPEN i i Water Distribution SUCHONEDE system Liquid Line Evaporator ff va il Condenser Y d herer Hot Gas Fan Motor i Valve TIirttriti en 1 itt ti ti 24 Ga OLLIE p H Filter NETTEN CELT ti Ti ti TT ty i ee yi Piittiti til pi La R EE ERI y aat EREPEPLE Thermo Exp Valve Water Reservoir Dryer Discharge Line Compressor Refrigeration Schematic August 1994 Page 16 CME650 Technical Characteristics Typical Cycle Time 18 19 minutes 90 F air and 70 F water 14 15 minutes 70 F air and 50 F water Typical Harvest Ice Weight e 5 5 6 pounds Typical Low Side Pressure Just Before Harvest Air cooled 70 F air 50 F water 25 PSIG A
29. the screws holding the valve to the bracket 4 Unplug the electrical connection from the valve 5 Remove the valve from the ice machine 6 Reverse the above steps to reassemble Inlet Water Valve October 1994 Page 21 CME650 REFRIGERATION SYSTEM HP62 R 404A Refrigerant THIS ICE MACHINE USES HP62 REFRIGERANT Pressure Temperature Chart for HP62 AND POLYOLESTER COMPRESSOR OIL VAPOR VAPOR DO NOT USE MINERAL OIL IN THIS TEMP PRESSURE TEMP PRESSURE REFRIGERATION SYSTEM DEG F PSIG DEG F PSIG e HP62 is a Near Azeotrope and therefore 20 17 TONS ve Mon tg th 23 146 liquid charging is required SUE tet as a ohn Gd 18 Fertig goad Rok 150 Weigh as much of the charge as liquid into FOE ody fae oats 20 re ad ie eet AE 155 the discharge side as possible aE eR 21 TE oe niye 161 Install a sight glass between the suction side V2 eee 23 ae ee 166 of the machine and the gage manifold Use 10 aeons a5 24 80 171 the manifold valve to flash off liquid before it Beau 26 82 177 enters the refrigeration system and weigh in 6 a 28 84 oaa 182 the balance of the charge E Pe ee ee TEn a When the system is serviced a special liquid Bae ict biel 33 Se era 200 line dryer is required see parts list Polyolester oil absorbs water very easily and 4 a O ee EEE 37 Qi ise bce Bee 212 therefore when the system is opened for 6 39 6 219 service it must be re sealed as soon
30. uction line filter dryers and liquid line filter dryers are recommended they must be compatable with polyolester oil and HFC refrigerant e Always replace the dryer when repairing a leak or replacing a refrigeration component Evacuate the system with a good vacuum pump to 200 microns or less If the triple evacuation method is used the vacuum should be broken each time with dry nitrogen not refrigerant Evacuation must be from both sides of the system Weigh in or measure in the nameplate charge Recharge into the high side eCheck for leaks with a high quality electronic leak detector capable of locating HP62 e f using recycled refrigerant it must meet ARI spec 700 or have been cleaned by a machine capable of attaining ARI spec 700 88 If an ice machine is to be discarded and still contains refrigerant Scotsman recommends that the refrigerant be recovered reclaimed or recycled so that it is not discharged into the air August 1994 Page 24
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