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Welbilt Koolaire KD0270A Technician'S Handbook Download Page 10

10 

Part Number STH047 Rev01 10/18

Maintenance

Ice Machine Inspection  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 27
Exterior Cleaning  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 27
Cleaning the Condenser  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 27
Interior Cleaning and Sanitizing .  .  .  .  .  .  .  .  .  .  .  . 29

Removal from Service/Winterization   .  .  .  .  .  .  .  .  . 42

Operation

Initial Start-up or Start-up After Automatic 
Shut-off  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 45
Freeze Sequence   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 45
Harvest Sequence  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 46
Automatic Shut-off  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 46
Energized Parts Chart .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 47

Operational Checks  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 49

Troubleshooting

Diagnosing an Ice Machine that Will Not Run  .  . 

 .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 53

Diagnosing Ice Thickness Control Circuitry  . 54
Ice Production Check  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 57
Installation and Visual Inspection Checklist . 59
Water System Checklist  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 60
Ice Formation Pattern .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 61
Safety Limit Feature   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 63
Analyzing Discharge Pressure    .  .  .  .  .  .  .  .  .  .  .  .  . 70
Analyzing Suction Pressure  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 72
Harvest Valve .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 76
Comparing Evaporator Inlet/Outlet 
Temperatures   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 80
Discharge Line Temperature Analysis .  .  .  .  .  .  . 81
Refrigeration Component Diagnostic Chart  83
Procedure .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 84
Final Analysis .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 85
Refrigeration Component Diagnostic Chart  86
Ice Quality Is Poor — Cubes are Shallow, 
Incomplete or White .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 89
Freeze Cycle Is Long, Low Ice Production   .  .  . 90
Ice Machine Runs and No Ice Is Produced .  .  . 91

Summary of Contents for Koolaire KD0270A

Page 1: ...art Number STH047 Rev01 10 18 Undercounter Ice Machines Technician s Handbook This manual is updated as new information and models are released Visit our website for the latest manual www kool aire co...

Page 2: ......

Page 3: ...act information for service agents in your area This equipment contains high voltage electricity and refrigerant charge Installation and repairs are to be performed by properly trained technicians awa...

Page 4: ...he disconnect means to satisfy local codes Refer to rating plate for proper voltage This appliance must be grounded This equipment must be positioned so that the plug is accessible unless other means...

Page 5: ...on OEM ice storage system with this ice machine contact the bin manufacturer to assure their ice deflector is compatible Remove all removable panels before lifting and installing and use appropriate s...

Page 6: ...ir between approximately 2 1 and 9 5 by volume LEL lower explosion limit and UEL upper explosion limit An ignition source at a temperature higher than 470 C is needed for a combustion to occur Refer t...

Page 7: ...chemicals rubber gloves and eye protection and or face shield must be worn DANGER Do not operate equipment that has been misused abused neglected damaged or altered modified from that of original manu...

Page 8: ...Risk of fire shock All minimum clearances must be maintained Do not obstruct vents or openings Failure to disconnect power at the main power supply disconnect could result in serious injury or death...

Page 9: ...e Machine Clearance Requirements 18 Ice Machine Heat of Rejection 18 Leveling the Ice Machine 19 Electrical Requirements 20 Voltage 20 Fuse Circuit Breaker 20 Total Circuit Ampacity 20 Electrical Spec...

Page 10: ...3 Diagnosing Ice Thickness Control Circuitry 54 Ice Production Check 57 Installation and Visual Inspection Checklist 59 Water System Checklist 60 Ice Formation Pattern 61 Safety Limit Feature 63 Analy...

Page 11: ...Diagnostics 101 Fan Cycle Control 103 High Pressure Cutout HPCO Control 104 Filter Driers 105 Refrigerant Recovery Evacuation 106 Refrigerant Re use Policy 107 Recovery and Recharging Procedures 109 S...

Page 12: ...m Refrigerant Charge 122 Charts Cycle Times 24 Hr Ice Production and Refrigerant Pressure Charts 123 KF0150A self contained Air Cooled 124 K170A Self contained Air cooled 125 KF0250 Self contained Air...

Page 13: ...KD0172A N A KY0174A N A KDF0250A N A KYF0250A N A KR0270A KR0271W KD0272A KD0273W KY0274A KY0275W nWarning An ice machine contains high voltage electricity and refrigerant charge Repairs are to be pe...

Page 14: ...ributor for these optional accessories BIN CASTER Replaces standard legs CLEANER AND SANITIZER Manitowoc Ice Machine Cleaner and Sanitizer are available in convenient 16 oz 473 ml and 1 gal 3 78 l bot...

Page 15: ...erial number are listed on the OWNER WARRANTY REGISTRATION CARD They are also listed on the MODEL SERIAL NUMBER DECAL affixed to the ice machine MODEL SERIAL NUMBER PLATE MODEL SERIAL NUMBER PLATE SV1...

Page 16: ...16 Part Number STH047 Rev01 10 18 THIS PAGE INTENTIONALLY LEFT BLANK...

Page 17: ...ating equipment or in direct sunlight The location must be capable of supporting the weight of the ice machine and a full bin of ice The location must allow enough clearance for water drain and electr...

Page 18: ...on and servicing only Ice Machine Heat of Rejection Series Ice Machine Heat of Rejection Air Conditioning Peak KF150 2200 2600 K170 2200 2600 KF250 3800 6000 K270 3800 6000 B T U Hour Because the heat...

Page 19: ...to its final position 4 Level the ice machine to ensure that the siphon system functions correctly Use a level on top of the ice machine Turn each foot as necessary to level the ice machine from front...

Page 20: ...iguration The 208 230 1 60 and 230 1 50 ice machines are factory pre wired with a power cord only no plug is supplied FUSE CIRCUIT BREAKER A separate fuse circuit breaker must be provided for each ice...

Page 21: ...1 8 K270 115 1 60 15 amp 10 7 208 230 1 60 15 amp 5 2 230 1 50 15 amp 5 2 nWarning All wiring must conform to local state and national codes nWarning The ice machine must be grounded in accordance wit...

Page 22: ...e working Check valves on sink faucets dishwashers etc If water pressure exceeds the maximum recommended pressure 80 psig 5 5 bar obtain a water pressure regulator from your distributor Install a wate...

Page 23: ...F 4 C min 90 F 32 2 C max 20 psi 1 38 bar min 80 psi 5 5 bar max 3 8 Female Pipe Thread 3 8 9 5 mm min inside diameter Condenser Water Inlet 33 F 0 6 C min 90 F 32 2 C max 20 psi 1 38 bar min 150 psi...

Page 24: ...unt of heat rejected and the pressure drop through the condenser and water valves inlet to outlet when using a cooling tower on an ice machine Water entering the condenser must not exceed 90 F 32 2 C...

Page 25: ...7 Rev01 10 18 25 Evaporator Compartment ICE THICKNESS PROBE WATER PUMP ICE DAMPER WATER TROUGH DISTRIBUTION TUBE SV1694A BIN SWITCH MAGNET FLOAT VALVE SIPHON CAP SV1695A Evaporator Compartment Compone...

Page 26: ...8 ON OFF WASH TOGGLE SWITCH COMPRESSOR COMPARTMENT ACCESS SCREWS CONDENSED AIR FILTER SV1686G KF150 K170 Ice Machines ON OFF WASH TOGGLE SWITCH COMPRESSOR COMPARTMENT ACCESS SCREWS CONDENSED AIR FILTE...

Page 27: ...NING Clean the area around the ice machine as often as necessary to maintain cleanliness and efficient operation Sponge any dust and dirt off the outside of the ice machine with mild soap and water Wi...

Page 28: ...and water solution 2 Clean the outside of the condenser with a soft brush or a vacuum with a brush attachment Clean from top to bottom not side to side Be careful not to bend the condenser fins 3 Shin...

Page 29: ...3 and Sanitizer part number 94 0565 3 It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling Read and understand all labels printed on bottles before use...

Page 30: ...e all ice from the bin Step 3 To start a cleaning cycle move the toggle switch to the WASH position Step 4 Add the proper amount of Ice Machine Cleaner to the water trough Model Amount of Cleaner KF15...

Page 31: ...the Water Pump and Water Distribution Tube C Remove Water Pump Disconnect the water pump power cord Loosen the screws securing the pump mounting bracket to the bulkhead Lift the pump and bracket assem...

Page 32: ...met out of the back wall by inserting fingernails or a flat object between the back wall and the grommet and prying forward Pull the bulkhead grommet and wire forward until the connector is accessible...

Page 33: ...ION TUBE 1 2 3 SV1630 Water Distribution Tube Removal Loosen the two thumbscrews which secure the distribution tube Lift the right side of the distribution tube up off the locating pin then slide it b...

Page 34: ...STH047 Rev01 10 18 Disassembly Twist both of the inner tube ends until the tabs line up with the keyway Pull the inner tube ends outward KEYWAY INNER TUBE TAB INNER TUBE SV1211 Water Distribution Tub...

Page 35: ...ns COMPRESSION FITTING FLOAT VALVE BRACKET SHUT OFF VALVE CAP AND FILTER SCREEN SPLASH SHIELD FLOAT SV1695 2 Float Valve Removal Pull the float valve forward and off the mounting bracket Disconnect th...

Page 36: ...and remove from the bottom of the water trough Remove the upper thumbscrew While supporting the water trough remove the two thumbscrews from beneath the water trough Remove the water trough from the...

Page 37: ...thumb Pull ice damper forward when the right hand ice damper pin disengages STEP 1 STEP 2 STEP 3 SV1742A Installation Place ice damper pin in left hand mounting bracket and apply pressure toward the...

Page 38: ...against the bin door pull down on the rear of each bin door track until the door pins clear the stop tabs Slide the rear door pins off the end and then below the door track Slide bin door forward allo...

Page 39: ...once the foaming stops use a soft bristle brush sponge or cloth not a wire brush to carefully clean the parts Soak the parts for 5 minutes 15 20 minutes for heavily scaled parts Rinse all components w...

Page 40: ...orator plastic parts including top bottom and sides Bin bottom sides and top Do not rinse the sanitized areas Step 13 Replace all removed components Step 14 Reapply power and water to the ice machine...

Page 41: ...parts in the sanitizer water solution Do not rinse parts after sanitizing Step 19 Use 1 2 of the sanitizer water solution to sanitize all foodzone surfaces of the ice machine and bin Use a cloth or sp...

Page 42: ...covered by the warranty Follow the applicable procedure below Self contained Air cooled Models 1 Disconnect the electric power at the circuit breaker or the electric service switch 2 Turn off the wate...

Page 43: ...Disconnect the incoming water and drain lines from the water cooled condenser 3 Insert a large screwdriver between the bottom spring coils of the water regulating valve Pry upward to open the valve SV...

Page 44: ...44 Part Number STH047 Rev01 10 18 THIS PAGE INTENTIONALLY LEFT BLANK...

Page 45: ...eze and Harvest Sequences The fan motor is wired through a fan cycle pressure control therefore it may cycle on and off The compressor and condenser fan motor are wired through the relay As a result a...

Page 46: ...g and re closing of the bin switch terminates the Harvest Sequence and returns the ice machine to the Freeze Sequence steps 3 4 AUTOMATIC SHUT OFF 6 Automatic Shut off When the storage bin is full at...

Page 47: ...NCE OF OPERATION Control Board Relays Relay Length of Time 1 Water Pump 2 Harvest Valve 3 Relay Coil 3A Compressor 3B Compressor Fan Motor Initial Start up 1 Water purge off on off off off 15 seconds...

Page 48: ...ontrol Board Relays Relay Length of Time 1 Water Pump 2 Harvest Valve 3 Relay Coil 3A Compressor 3B Compressor Fan Motor Harvest Sequence 5 Harvest off on on on on Bin switch activation Automatic Shut...

Page 49: ...er level in the sump trough drops When the siphon action stops the float valve refills the water trough to the correct level Follow steps 1 through 6 under water level check to verify the siphon syste...

Page 50: ...stops adding water 4 Adjust the water level to 1 4 to 3 8 6 3 to 9 5 mm below the standpipe the line in the water trough A Loosen the two screws on the float valve bracket B Raise or lower the float v...

Page 51: ...bridge of 1 8 3 2 mm If an adjustment is needed follow the steps below 1 Turn the ice thickness probe adjustment screw clockwise for a thicker ice bridge or counterclockwise for a thinner ice bridge 2...

Page 52: ...52 Part Number STH047 Rev01 10 18 THIS PAGE INTENTIONALLY LEFT BLANK...

Page 53: ...Verify control board fuse is okay 3 If the bin switch light functions the fuse is okay 4 Verify the bin switch functions properly A defective bin switch can falsely indicate a full bin of ice 5 Verify...

Page 54: ...PROBE CONNECTION GROUND JUMPER WIRE BIN SWITCH LIGHT GREEN HARVEST LIGHT RED SV1592i Step 2 Jumper wire connected from probe to ground Monitoring Harvest Light Correction The harvest light comes on an...

Page 55: ...wire connected from control board terminal to ground Monitoring Harvest Light Correction The harvest light comes on and 6 10 seconds later ice machine cycles from freeze to harvest The ice thickness...

Page 56: ...e from the control board terminal ICE THICKNESS PROBE DISCONNECT PROBE WIRE BIN SWITCH LIGHT GREEN HARVEST LIGHT RED SV1592J_2 Step 2 Disconnect probe from control board terminal Monitoring Harvest Li...

Page 57: ...ing sump trough ____ 2 Refer to the appropriate 24 Hour Ice Production Chart Use the operating conditions determined in step 1 to find published 24 Hour Ice Production _____ Times are in minutes Examp...

Page 58: ...d with the 24 Hour Ice Production Charts may be used 4 Compare the results of step 3 with step 2 Ice production is normal when these numbers match closely If they match closely determine if Another la...

Page 59: ...ECKLIST Ice machine is not level Level the ice machine Condenser is dirty Clean the condenser Water filtration is plugged if used Install a new water filter Water drains are not run separately and or...

Page 60: ...e or increase the water pressure Incoming water temperature is not between 35 F 1 7 C and 90 F 32 2 C If too hot check the hot water line check valves in other store equipment Water filtration is plug...

Page 61: ...he overflow pipe a faulty water float valve a low refrigerant charge etc OUTLET INLET OUTLET INLET K170 K270 Examples of Evaporator Tubing Routing Normal Ice Formation Ice forms across the entire evap...

Page 62: ...derable lack of ice formation at the inlet of the evaporator Examples The ice at the outlet of the evaporator reaches the correct thickness but there is no ice formation at all at the inlet of the eva...

Page 63: ...g procedure 1 Move the ON OFF WASH switch to OFF and then back to ON 2 If the safety limit feature has stopped the ice machine it will restart after a short delay Proceed to step 4 3 If the ice machin...

Page 64: ...During the Stand by Mode the harvest light will be flashing continuously and a safety limit indication can be viewed If the same safety limit is reached a second time the problem has reoccurred the i...

Page 65: ...y limit indication A continuous run of 100 harvests automatically erases the safety limit code The control board will store and indicate only one safety limit the last one exceeded If the toggle switc...

Page 66: ...its are designed to stop the ice machine prior to major component failures most often a minor problem or something external to the ice machine This may be difficult to diagnose as many external proble...

Page 67: ...allation and Visual Inspection Checklist on page 59 Water System Water Level set too high water escaping through over flow tube Low water pressure 20 psig min High water pressure 80 psig max High wate...

Page 68: ...er discharge air re circulation Dirty condenser fins Non OEM components Improper refrigerant charge Defective compressor TXV starving or flooding check bulb mounting Non condensable in refrigeration s...

Page 69: ...outlet drain Water freezing behind evaporator Plastic extrusions and gaskets not securely mounted to the evaporator Low water pressure 20 psig min Loss of water from sump area Clogged water distribut...

Page 70: ...essures Freeze Cycle ______ Harvest Cycle ______ 3 Perform an actual discharge pressure check Freeze Cycle PSIG Harvest Cycle PSIG Beginning of Cycle __________ __________ Middle of Cycle __________ _...

Page 71: ...n condensible in system Wrong type of refrigerant Other Non OEM components in system High side refrigerant lines component Restricted before mid condenser Freeze Cycle Discharge Pressure Low Checklist...

Page 72: ...emperature entering the ice machine changes These variables also determine the freeze cycle times To analyze and identify the proper suction pressure drop throughout the freeze cycle compare the publi...

Page 73: ...eeze Cycle Suction Pressure psig In the example the proper suction pressure should be approximately 39 psig at 7 minutes 30 psig at 12 minutes etc 3 Perform an actual suction pressure check at the beg...

Page 74: ...ge 59 Discharge Pressure Discharge pressure is too high and is affecting suction pressure refer to Discharge Pressure High Checklist on page 71 Improper Refrigerant Charge Overcharged Wrong type of re...

Page 75: ...rge Pressure Low Checklist Improper Refrigerant Charge Undercharged Wrong type of refrigerant Other Non OEM components in system Improper water supply over evaporator refer to Water System Checklist o...

Page 76: ...e harvest valve is not used during the freeze cycle The harvest valve is de energized closed preventing refrigerant flow from the receiver into the evaporator 2 Allows refrigerant vapor to enter the e...

Page 77: ...REMAINS OPEN IN THE FREEZE CYCLE Symptoms of a harvest valve remaining partially open during the freeze cycle can be similar to symptoms of an expansion valve float valve or compressor problem Symptom...

Page 78: ...or across the harvest valve itself will not work for this comparison The harvest valve outlet is on the suction side cool refrigerant It may be cool enough to touch even if the valve is leaking 3 Feel...

Page 79: ...temperature of a hot compressor discharge line Hot Hot This is an indication something is wrong as the harvest valve inlet did not cool down during the freeze cycle If the compressor dome is also enti...

Page 80: ...These temperatures must be within 7 F 4 C of each other Use this procedure to document freeze cycle inlet and outlet temperatures 1 Use a quality temperature meter capable of taking temperature readi...

Page 81: ...ir temperatures affect the maximum discharge line temperature Higher ambient air temperatures at the condenser higher discharge line temperatures at the compressor Lower ambient air temperatures at th...

Page 82: ...on valve sensing bulb is positioned and secured correctly Discharge Line Temperature Below 150 F 66 C at End of Freeze Cycle Ice machines that have a flooding expansion valve will have a maximum disch...

Page 83: ...charts checklists and other references to eliminate refrigeration components not listed and external items and problems that will cause good refrigeration components to appear defective The tables li...

Page 84: ...ck all information listed Each item in this column has supporting reference material While analyzing each item separately you may find an external problem causing a good refrigerant component to appea...

Page 85: ...arge of refrigerant If the problem is corrected the ice machine is low on charge Find the refrigerant leak The ice machine must operate with the nameplate charge If the leak cannot be found proper ref...

Page 86: ...harted capacity Installation and Water System All installation and water related problems must be corrected before proceeding with chart Ice Formation Pattern Ice formation is extremely thin on top of...

Page 87: ...discharge pressure is High or Low refer to freeze cycle high or low discharge pressure problem checklist to eliminate problems and or components not listed on this table before proceeding Freeze Cycl...

Page 88: ...compressor discharge line is HOT Discharge Line Temp Record freeze cycle discharge line temp at the end of freeze cycle Discharge line temp 150 F 66 C or higher at the end of freeze cycle Discharge l...

Page 89: ...is poor Replace the filter Water softener is working improperly if applicable Repair the water softener Poor incoming water quality Contact a qualified company to test the quality of the incoming wat...

Page 90: ...ed 120 F 39 C Water inlet valve filter screen is dirty Remove the water inlet valve and clean the filter screen Water inlet valve stuck open or leaking Turn off ice machine if water continues to enter...

Page 91: ...mineral buildup Clean and sanitize the ice machine Ambient temperature is too high or low Ambient temperature must be between 50 F and 110 F 10 C and 43 C Compressor relay inoperable No voltage to coi...

Page 92: ...92 Part Number STH047 Rev01 10 18 THIS PAGE INTENTIONALLY LEFT BLANK...

Page 93: ...t all times Removing the control board fuse or moving the toggle switch to OFF will not remove the power supplied to the control board Check Procedure 1 If the bin switch light is on with the ice damp...

Page 94: ...n for 7 seconds the ice machine shuts off The ice machine remains off until enough ice is removed from the storage bin to allow the sheet of cubes to drop clear of the ice damper As the ice damper swi...

Page 95: ...bin switch wires 3 Cycle the bin switch open and closed numerous times by opening and closing the water curtain NOTE To prevent mis diagnosis Always use the water curtain magnet to cycle the switch a...

Page 96: ...switch wires in control box 3 Insert a small screwdriver through the hole located in the top of the bin switch and depress mounting tab slightly 4 While depressing mounting tab roll bin switch to rig...

Page 97: ...nce is present A good test is to install a known good substitute capacitor Use a capacitor tester when checking a suspect capacitor Clip the bleed resistor off the capacitor terminals before testing R...

Page 98: ...Inspect the toggle switch for correct wiring 2 Isolate the toggle switch by disconnecting all wires from the switch or by disconnecting the Molex connector from the control board 3 Check across the t...

Page 99: ...ut of harvest The control board locks the ice machine in the freeze cycle for six minutes If water contacts the ice thickness probe during these six minutes the harvest light will come on to indicate...

Page 100: ...ridge connecting the cubes It should be about 1 8 3 2 mm thick 2 If adjustment is necessary turn the ice thickness probe adjustment screw clockwise to increase bridge thickness or counterclockwise to...

Page 101: ...e the wires from the compressor terminals 2 The resistance values between C and S and between C and R when added together should equal the resistance value between S and R 3 If the overload is open th...

Page 102: ...e pressures do not move the compressor is seized Replace the compressor If the pressures move the compressor is turning slowly and is not seized Check the capacitors and relay Compressor Drawing High...

Page 103: ...re 1 Disconnect electrical power to the ice machine at the electrical service disconnect 2 Verify fan motor windings are not open or grounded and fan spins freely 3 Connect manifold gauge set to ice m...

Page 104: ...e HPCO leaving wires attached 4 On water cooled models close the water service valve to the water condenser inlet On self contained air cooled models disconnect the fan motor 5 Set ON OFF WASH switch...

Page 105: ...ire drier has dirt retaining filtration with fiberglass filters on both the inlet and outlet ends This is very important because ice machines have a back flushing action that takes place during every...

Page 106: ...Reclaim To reprocess refrigerant to new product specifications see below by means which may include distillation A chemical analysis of the refrigerant is required after processing to be sure that pro...

Page 107: ...rom the use of contaminated recovered or recycled refrigerant is the sole responsibility of the servicing company Koolaire approves the use of 1 New Refrigerant Must be of original nameplate type 2 Re...

Page 108: ...d evacuated and recharged properly following failure s Whether the system has been contaminated by this failure Compressor motor burnouts and improper past service prevent refrigerant re use Refer to...

Page 109: ...for the use of contaminated refrigerant Damage resulting from the use of contaminated refrigerant is the sole responsibility of the servicing company Importan Replace the liquid line drier before evac...

Page 110: ...he pump and perform a standing vacuum leak check NOTE Check for leaks using a halide or electronic leak detector after charging the ice machine Follow the Charging Procedures below CHARGING PROCEDURES...

Page 111: ...ing the charging hoses A Run the ice machine in freeze cycle B Close the high side service valve at the ice machine C Open the low side service valve at the ice machine when supplied or disconnect the...

Page 112: ...on of system contamination Obvious moisture or an acrid odor in the refrigerant indicates contamination If either condition is found or if contamination is suspected use a Total Test Kit from Totaline...

Page 113: ...or acid oil test shows contamination No burnout deposits in open compressor lines Mild contamination cleanup procedure Mild Compressor Burnout symptoms Oil appears clean but smells acrid Refrigeration...

Page 114: ...the normal evacuation procedure except replace the evacuation step with the following A Pull vacuum to 1000 microns Break the vacuum with dry nitrogen and sweep the system Pressurize to a minimum of...

Page 115: ...mmended for this procedure This will prevent CFC release 6 Install a new compressor and new start components 7 Install suction line filter drier in front of compressor 8 Install a new liquid line drie...

Page 116: ...is less than 2 psig the filter drier should be adequate for complete cleanup B If the pressure drop exceeds 2 psig change the suction line filter drier and the liquid line drier Repeat until the press...

Page 117: ...tool around the tubing as far from the pressure control as feasible See the figure on next page Clamp down on the tubing until the pinch off is complete nWarning Do not unsolder a defective component...

Page 118: ...118 Part Number STH047 Rev01 10 18 FIG A PINCHING OFF TUBING FIG B RE ROUNDING TUBING SV1406 Using Pinch Off Tool...

Page 119: ...ontact is made with the stop screw approximately 2 5 6 3 cm Caution Do not move base past the stop screw tubing damage could result 4 Remove right hand screw securing condenser to base 5 Pivot condens...

Page 120: ...120 Part Number STH047 Rev01 10 18 THIS PAGE INTENTIONALLY LEFT BLANK...

Page 121: ...switch The switch is connected into a varying low D C voltage circuit Fan Control Cycle Model Cut in Close Cut out Open KF150 K170 275 psig 5 225 psig 5 KF250 K270 250 psig 5 200 psig 5 High Pressure...

Page 122: ...ce only Refer to the ice machine serial number tag to verify the system charge Serial plate information overrides information listed on this page Model Air Cooled Water Cooled Refrigerant Type KF150 1...

Page 123: ...imits comparing evaporator inlet outlet temperatures harvest valve analysis discharge and suction pressure analysis Ice production checks that are within 10 of the chart are considered normal This is...

Page 124: ...e Production Air Temp Entering Condenser F C Water Temperature F C 50 10 70 21 90 32 70 21 165 155 125 80 27 155 145 115 90 32 140 125 110 100 38 120 105 90 110 43 95 80 65 Based on average ice slab w...

Page 125: ...Production Air Temp Entering Condenser F C Water Temperature F C 50 10 70 21 90 32 70 21 175 160 130 80 27 165 150 120 90 32 150 130 115 100 38 130 110 97 110 43 105 85 70 Based on average ice slab w...

Page 126: ...s 24 Hour Ice Production Air Temp Entering Condenser F C Water Temperature F C 50 10 70 21 90 32 70 21 255 220 195 80 27 240 210 185 90 32 225 180 160 100 38 210 155 135 110 43 195 130 110 Based on av...

Page 127: ...Production Air Temp Entering Condenser F C Water Temperature F C 50 10 70 21 90 32 70 21 280 245 220 80 27 275 240 215 90 32 250 215 190 100 38 225 190 165 110 43 210 165 140 Based on average ice sla...

Page 128: ...290 255 235 80 27 285 250 230 90 32 280 245 225 100 38 275 240 220 Based on average ice slab weight of 2 44 2 75 lb 1107 1247 g Regular cube derate is 7 Condenser Water Consumption 90 32 Air Temperat...

Page 129: ...before working on electrical circuitry Wiring Diagram Legend The following symbols are used on all of the wiring diagrams Internal Compressor Overload Some models have external compressor overloads F...

Page 130: ...Number STH047 Rev01 10 18 KF150 K170 WIRING DIAGRAM NOTE Diagram shown in the freeze cycle L1 L2 GND 23 27 18 29 19 7 10 5 30 4 1 22 20 21 15 2 7 23 3 13 8 6 5 9 14 4 32 3 2 21 20 24 12 25 10 11 C S...

Page 131: ...h 5 Bin Switch 6 Bin Thermostat 7 High Pressure Cut Out 10 Harvest Solenoid Valve 18 Contactor Coil 19 Contactor Contacts 20 Compressor 21 Compressor Relay 23 Compressor Start Capacitor 25 Compressor...

Page 132: ...er STH047 Rev01 10 18 KF250 K270 WIRING DIAGRAM NOTE Diagram shown in the freeze cycle L1 L2 GND 21 27 18 29 19 7 10 5 30 4 1 22 20 21 46 2 7 23 3 45 8 6 5 9 14 4 32 3 2 23 20 24 12 25 49 47 44 10 5 2...

Page 133: ...n Thermostat 7 High Pressure Cut Out 10 Harvest Solenoid Valve 18 Contactor Coil 19 Contactor Contacts 20 Compressor 21 Compressor Potential Relay 23 Compressor Start Capacitor 25 Compressor Overload...

Page 134: ...bing Schematic HEAT EXCHANGER AIR OR WATER CONDENSER DRIER RECEIVER WATER COOLED ONLY EXPANSION VALVE HARVEST SOLENOID VALVE EVAPORATOR COMPRESSOR STRAINER SV3023 10 AMP FUSE DC VOLTAGE ELECTRICAL PLU...

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Page 136: ...se All rights reserved Part Number STH047 Rev01 10 18 Every new piece of Welbilt equipment comes with KitchenCare and you choose the level of service that meets your operational needs from one restaur...

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