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Part Number STH047 Rev01 10/18 11

Component Check Procedures

Main Fuse  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 93

Bin Switch .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 94

Diagnosing Start Components .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 97

Capacitor   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 97
Relay .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 97

ON/OFF/WASH Toggle Switch  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 98

Ice Thickness Probe  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  99

Ice Thickness Check   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 100

Compressor Electrical 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

System Contamination Cleanup   .  .  .  .  .  .  .  .  .  .  .  .  . 112

Mild System Contamination Cleanup 
Procedure .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 114
Severe System Contamination Cleanup 
Procedure .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 115
Replacing Pressure Controls without 
Removing Refrigerant Charge .  .  .  .  .  .  .  .  .  .  .  .  . 117

KF250/K270 Condenser Fan Motor Access   .  .  . 119

Содержание Koolaire KD0270A

Страница 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...

Страница 2: ......

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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 __________ _...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

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

Страница 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...

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

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 135: ......

Страница 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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