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Koolaire KDT0300A, Technician'S Handbook

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Koolaire KDT0300A Technician'S Handbook Download Page 11

Part Number STH063 9/17 

11

Component Check Procedures

Main Fuse

   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 85

Bin Switch

   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 86

Float Switch

 .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 88

Compressor Electrical Diagnostics

 .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 90

Fan Cycle Control

 .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 92

High Pressure Cutout (HPCO) Control

   .  .  .  .  .  .  .  .  .  .  . 93

Refrigeration Components

 .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 94

Head Pressure Control Valve  . . . . . . . . . . . . . .94

Freeze Cycle Operation All Models  . . . . . . . . .95

Harvest Cycle Operation. . . . . . . . . . . . . . . . . .95

Harvest Pressure Regulating (Hpr) System 

Remote Condenser Only. . . . . . . . . . . . . . . . . .98

Water Regulating Valve. . . . . . . . . . . . . . . . . .101

Refrigerant Recovery/Evacuation

   .  .  .  .  .  .  .  .  .  .  .  .  .  . 102

Definitions  . . . . . . . . . . . . . . . . . . . . . . . . . . . .102

Refrigerant Re-use Policy  . . . . . . . . . . . . . . . .103

Recovery and Recharging Procedures   . . . . .105

System Contamination Cleanup. . . . . . . . . . .107

Determining Severity of Contamination  . . . .107

Mild System Contamination Cleanup Procedure  

  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .109

Severe System Contamination Cleanup 

Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . .110

Replacing Pressure Controls without Removing 

Refrigerant Charge  . . . . . . . . . . . . . . . . . . . . .111

Refrigerant Amount

   .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  .  . 113

Summary of Contents for KDT0300A

Page 1: ...Part Number STH063 9 17 Koolaire KT Model Ice Machines Technician s Handbook ...

Page 2: ......

Page 3: ...ntact 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 aware of the dangers of dealing with high voltage electricity and refrigerant under pressure The technician must also be certified in proper refrigerant handling and servicing procedures All lockout an...

Page 4: ...the 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 for disconnection from the power supply e g circuit breaker or disconnect switch is provided Check all wiring connections including factory terminals before operation Connections can become loose dur...

Page 5: ...eight of the equipment and product Additionally the equipment must be level side to side and front to back Remove all removable panels before lifting and installing and use appropriate safety equipment during installation and servicing Two or more people are required to lift or move this appliance to prevent tipping and or injury Do not damage the refrigeration circuit when installing maintaining ...

Page 6: ...Read this manual thoroughly before operating installing or performing maintenance on the equipment Failure to follow instructions in this manual can cause property damage injury or death Crush Pinch Hazard Keep hands clear of moving components Components can move without warning unless power is disconnected and all potential energy is removed Moisture collecting on the floor will create a slippery...

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 manufactured specifications This appliance is not intended for use by persons including children with reduced physical sensory or mental capabilities or lack of experience and knowledge unless they have ...

Page 8: ... or combustible cleaning solutions for cleaning All covers and access panels must be in place and properly secured when operating this equipment 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 The power switch DOES NOT disconnect all incoming power ...

Page 9: ...eveling the Ice Machine 17 Electrical Requirements 18 Water Service Drains 19 Water Supply 19 Water Inlet Lines 19 Drain Connections 20 Cooling Tower Applications 20 Water Supply and Drain Line Sizing Connections 21 Remote Condenser 22 Maximum Line Set Distance Formula 25 Operation Ice Making Sequence of Operation 27 Control Board Timers 28 Safety Limits 29 Energized Parts Chart 31 Operational Che...

Page 10: ... Will Not Run 48 Ice Machine Does Not Cycle Into Harvest when Water Loses Contact with the Harvest Float Switch 49 Ice Machine Cycles Into Harvest Before Water Loses Contact with the Harvest Float Switch 51 Ice Production Check 52 Installation Visual Inspection Checklist 53 Water System Checklist 54 Ice Formation Pattern 55 Safety Limits 58 Analyzing Discharge Pressure 65 Analyzing Suction Pressur...

Page 11: ...t Cycle Operation 95 Harvest Pressure Regulating Hpr System Remote Condenser Only 98 Water Regulating Valve 101 Refrigerant Recovery Evacuation 102 Definitions 102 Refrigerant Re use Policy 103 Recovery and Recharging Procedures 105 System Contamination Cleanup 107 Determining Severity of Contamination 107 Mild System Contamination Cleanup Procedure 109 Severe System Contamination Cleanup Procedur...

Page 12: ...d 125 KT1000W Self contained Water cooled 126 KT1000N Remote Air cooled 127 Kt1700A Self contained Air cooled 128 KT1700W Self contained Water cooled 129 KT1700N Remote Air cooled 130 Diagrams Wiring Diagrams 131 KT0300 KT0500 KT0700 KT1000 1 Ph Self contained Air Water cooled 132 KT0420 1Ph Self contained Air Water cooled 134 KT1000 1Ph Remote Air cooled Condenser 136 KT1700 1Ph Self contained Ai...

Page 13: ...tained Water Cooled Remote KDT0300A KYT0300A KDT0400A KDT0400W KYT0400A KYT0400W KDT0420A KDT0420W KYT0420A KYT0420W KDT0500A KDT0500W KYT0500A KYT0500W KDT0700A KDT0700W KYT0700A KYT0700W KDT1000A KDT1000W KYT1000N KYT1000A KYT1000W KDT1000N KDT1700A KDT1700W KYT1700N KYT1700A KYT1700W KDT1700N General Information ...

Page 14: ...s are to be performed by properly trained refrigeration technicians aware of the dangers of dealing with high voltage electricity and refrigerant under pressure Ice Machine Warranty Information For warranty information visit http www manitowocice com Service Warranty Warranty Verification Warranty Registration View and download a copy of the warranty Owner Warranty Registration Card Warranty cover...

Page 15: ... 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 electrical connections in the rear of the ice machine The location must not obstruct airflow through or around the ice machine condenser air flow is in the back and out the sides Refer to the chart for clearance...

Page 16: ...oled Top Sides 12 30 5 cm n a Back 5 12 7 cm n a KT0400 KT0420 KT0500 KT0700 KT1000 KT1700 Self Contained Air Cooled Water Cooled and Remote Top Sides 8 20 3 cm 8 20 3 cm Back 5 12 7 cm 5 12 7 cm Caution The ice machine must be protected if it will be subjected to temperatures below 32 F 0 C Failure caused by exposure to freezing temperatures is not covered by the warranty ...

Page 17: ...es like other refrigeration equipment reject heat through the condenser It is helpful to know the amount of heat rejected by the ice machine when sizing air conditioning equipment where self contained air cooled ice machines are installed Leveling the Ice Machine 1 The leveling legs must be screwed into the bottom of the bin as far as possible Caution The legs must be screwed in tightly to prevent...

Page 18: ...city The total circuit ampacity is used to help select the wire size of the electrical supply The wire size or gauge is also dependent upon location materials used length of run etc so it must be determined by a qualified electrician Refer to ice machine data plate for electrical requirements The ice machine data plate information overrides all other published data nWarning All wiring must conform...

Page 19: ...s nWarning For ice making connect to a potable water supply only WATER INLET LINES Follow these guidelines to install water inlet lines Do not connect the ice machine to a hot water supply Be sure all hot water restrictors installed for other equipment are working Check valves on sink faucets dishwashers etc If water pressure exceeds the maximum recommended pressure 80 psig 5 5 bar obtain a water ...

Page 20: ...ter cooling tower installation does not require modification of the ice machine The water regulator valve for the condenser continues to control the refrigeration discharge pressure It is necessary to know the amount 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...

Page 21: ...in 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 Ice Making Water Drain 1 2 Female Pipe Thread 1 2 13 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 10 3 bar max 3 8 Female Pipe Thread 3 8 9 5 mm min inside diameter Condenser Water Drain 1 2 Female Pipe Thread 1 2 13 mm min insid...

Page 22: ...L 35R R410A RL 50R R410A Line Set Discharge Line Liquid Line RT 1 2 1 27 cm 5 16 79 cm RL 1 2 1 27 cm 3 8 95 cm Air Temperature Around the Condenser Minimum Maximum 20 F 29 C 120 F 49 C Additional Refrigerant Charge For 51 to 100 Line Sets Ice Machine Condenser Additional Amount of Refrigerant To Be Added To The Nameplate Charge KT1000 JCT1200 2 lbs 907g KT1700 JCT1500 2 lbs 907g ...

Page 23: ...ise Drop The maximum rise is 35 10 7 m The maximum drop is 15 4 5 m 35 FT 10 7 M MAXIMUM DISTANCE 35 ft 10 7 m Rise The maximum distance the Condenser or Condensing Unit can be above the ice machine 15 FT 4 5 M MAXIMUM DISTANCE 15 ft 4 5 m Drop The maximum distance the Condenser or Condensing Unit can be below the ice machine ...

Page 24: ...below Multiply by 1 7 to get the calculated rise Example A condenser located 10 feet above the ice machine has a calculated rise of 17 feet 2 Insert the measured drop into the formula below Multiply by 6 6 to get the calculated drop Example A condenser located 10 feet below the ice machine has a calculated drop of 66 feet 3 Insert the measured horizontal distance into the formula below No calculat...

Page 25: ...asured Rise ____ X 1 7 ______Calculated Rise 35 ft Max Step 2 Measured Drop ____ X 6 6 ______Calculated Drop 15 ft Max Step 3 Measured Horizontal Distance _________Horizontal 100 ft Max Distance Step 4 Total Calculated Distance ________Total Calculated 150 ft Max Distance ...

Page 26: ...26 Part Number STH063 9 17 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 27: ...s float switch is satisfied Freeze Water flowing across the evaporator freezes and builds ice on the evaporator After a sheet of ice has formed the Harvest float switch signals the control board to start a harvest cycle Harvest Cycle Any remaining water is purged down the drain as refrigerant gas warms the evaporator When the evaporator warms the sheet of cubes slides off the evaporator and into t...

Page 28: ...onds during the start of a freeze cycle a harvest sequence is initiated The maximum freeze time is 60 minutes at which time the control board automatically initiates a harvest sequence The maximum harvest time is 3 5 minutes The control board automatically initiates a freeze sequence when these times are exceeded The ice machine will continue to fill with water for up to six minutes or until the h...

Page 29: ...les control board light SL 1 light will flash on off at 1 second intervals If 6 consecutive 60 minute freeze cycles occur the ice machine stops and the SL 1 light on the control board will be on continuously Safety Limit 2 If the harvest time reaches 3 5 minutes the control board automatically returns the ice machine to the freeze cycle If three consecutive 3 5 minute harvest cycles occur the SL 2...

Page 30: ...machine stops for 30 minutes when the water inlet valve is energized for 4 minutes and the harvest float valve didn t open Control board lights SL 1 and SL 2 will flash on off at 1 second intervals The ice machine automatically restarts at the end of the 30 minute delay period and stops flashing the control board lights If 100 consecutive failures occur the ice machine stops and the SL 1 SL 2 ligh...

Page 31: ...s Float Switch Length of Time Initial Start up 1a Water purge 1b Delay period on on off on off closed closed 45 seconds off off off off off closed closed 5 seconds 2 Refrigeration System Start up 2a Equalize Pressure 2b Compressor Start up off on off off off closed closed 5 seconds off on off off on closed closed 5 seconds Freeze Sequence 3 Pre chill off off on off on open closed 120 Seconds initi...

Page 32: ...ff on open then closed closed then open Until Harvest Float Switch closes for 10 continual seconds Harvest Sequence 5 Water Purge on on off on on closed closed 45 seconds 6 Harvest off on off off on closed closed Bin switch activation 7 Automatic Shut off off off off off off closed closed Until bin switch re closes Condenser Fan Motor The fan motor is wired through a fan cycle pressure control the...

Page 33: ...ss at 1 8 3 mm NOTE Make sure the water curtain is in place when performing this check It prevents water from splashing out of the water trough 1 Inspect the bridge connecting the cubes It should be about 1 8 3 mm thick 2 If adjustment is necessary turn the ice thickness float switch clockwise to increase bridge thickness counterclockwise to decrease bridge thickness Adjust to achieve a 1 8 3 mm b...

Page 34: ...m Ice Weight Per Cycle Maximum Ice Weight Per Cycle KT0300 3 4 lbs 1542 g 3 9 lbs 1769 g KT0400 3 4 lbs 1542 g 3 9 lbs 1769 g KT0420 3 4 lbs 1542 g 3 9 lbs 1769 g KT0500 4 125 lbs 1871 g 4 75 lbs 2154 g KT0700 4 125 lbs 1871 g 4 75 lbs 2154 g KT1000 7 25 lbs 3288 g 7 75 lbs 3515 g KT1700 13 2 lbs 5987 g 14 8 lbs 6713 g ...

Page 35: ...t The ice machine must be taken apart for cleaning and sanitizing Caution Use only Manitowoc approved Ice Machine Cleaner part number 9405463 and Sanitizer part number 9405653 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 CLEANING AND SANITIZING PROCEDURE Ice machine cleaner is used ...

Page 36: ...ing the ice machine to start ice making after the clean cycle Place the toggle switch in the Ice position more than 2 minutes into the clean cycle Step 1 Place the toggle switch in the clean position after ice falls from the evaporator at the end of a Harvest cycle Or place the toggle switch in the off position and allow the ice to melt off the evaporator Caution Never use anything to force ice fr...

Page 37: ...n Wait until the water trough refills then add the proper amount of ice machine cleaner to the water trough Model Amount of Cleaner KT0300 KT0400 KT0420 KT0500 KT0700 KT1000 5 ounces 150 ml KT1700 9 ounces 265 ml Step 4 Wait until the clean cycle is complete approximately 24 minutes then place the toggle switch in the off position and disconnect power and water supplies to the ice machine Step 5 R...

Page 38: ...on will foam when it contacts lime scale and mineral deposits 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 with clean water Step 8 While components are soaking use half of the cleaner water solution to clean all foodzone surfaces of the ice machi...

Page 39: ...solution When sanitizing pay particular attention to the following areas Evaporator plastic parts including top bottom and sides Bin bottom sides and top Do not rinse the sanitized areas Step 12 Replace all removed components Step 13 Wait 25 minutes Step 14 Reapply power and water to the ice machine and place the toggle switch in the ice position Step 15 Water will flow through the water dump valv...

Page 40: ...hes Pull the float switch straight down to disengage Lower the float switch until the wiring connector is visible Disconnect the wire lead from the float switch Remove the float switch from the ice machine 4 Remove the water distribution tube NOTE Distribution tube thumbscrews are retained to prevent loss Loosen thumbscrews but do not pull thumbscrews out of distribution tube Loosen the two outer ...

Page 41: ...63 9 17 41 5 Remove the Water Trough Depress tabs on right and left side of the water trough Allow front of water trough to drop as you pull forward to disengage the rear pins Remove the water trough from the bin area ...

Page 42: ...anything to force ice from the evaporator Damage may result nWarning Wear rubber gloves and safety goggles and or face shield when handling Ice Machine Cleaner or Sanitizer Step 2 To start a cleaning cycle place the toggle switch in the clean position Water will flow through the water dump valve and down the drain Wait until the water trough refills then add the proper amount of ice machine cleane...

Page 43: ...e adequate airflow through and around the ice machine to maximize ice production and ensure long component life Exterior Cleaning 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 Wipe dry with a clean soft cloth Cleanup any fallen ice or water spills as th...

Page 44: ...w resulting in excessively high operating temperatures This reduces ice production and shortens component life Clean the condenser at least every six months nWarning The condenser fins are sharp Use care when cleaning them Shine a flashlight through the condenser to check for dirt between the fins Blow compressed air or rinse with water from the inside out opposite direction of airflow If dirt sti...

Page 45: ... the drain openings in the rear of the ice machine to remove all water 5 Place the toggle switch in the off position and disconnect the electric power at the circuit breaker or the electric service switch 6 Fill spray bottle with sanitizer and spray all interior food zone surfaces Do not rinse and allow to air dry 7 Replace all panels WATER COOLED MODELS 1 Perform Steps 1 6 under Air Cooled Models...

Page 46: ...46 Part Number STH063 9 17 THIS PAGE INTENTIONALLY LEFT BLANK ...

Page 47: ...ds The control board test mode performs the following functions for a 2 minute time period Energizes all control board relays Energizes all control board lights After 2 minutes the control board will automatically initiate and complete one ice making cycle then stop Canceling a test cycle To cancel a test cycle press the test button a second time Restarting a test cycle The test cycle will restart...

Page 48: ...closed 2 Verify control board fuse is okay NOTE If any control board lights are on the fuse is okay 3 Verify the bin switch functions properly A defective bin switch can falsely indicate a full bin of ice 4 Verify toggle switch functions properly A defective toggle switch may keep the ice machine in the OFF mode Refer to toggle switch diagnostics when Steps 1 3 test good 5 Be sure Steps 1 4 were f...

Page 49: ...ore the ice releases Remove all ice from the evaporator before starting diagnostic procedures Freeze Time Lock In Feature The ice machine control system incorporates a freeze time lock in feature This prevents the ice machine from short cycling in and out of harvest The control board locks the ice machine in the freeze cycle for six minutes After six minutes a harvest cycle can be initiated To all...

Page 50: ...On to cycle the ice machine on Wait until water flows over the evaporator then refer to chart Result Correction 10 seconds into the freeze cycle the ice machine cycles from freeze to harvest and the control board harvest light energizes The ice thickness float switch connectors or wiring are causing the malfunction The harvest light comes on but the ice machine remains in the freeze cycle The ice ...

Page 51: ...SS FLOAT SWITCH Step 2 Reapply power and move the toggle switch to Ice to bypass the freeze time lock in feature Wait until water flows over the evaporator then refer to chart Result Correction The harvest light does not come on and the ice machine stays in freeze The ice thickness float switch connectors or wiring are causing the malfunction Refer to float switch diagnostics 10 seconds into the f...

Page 52: ...ce Production _____ Times are in minutes Example 1 min 15 sec converts to 1 25 min 15 seconds 60 seconds 25 minutes Weights are in pounds Example 2 lb 6 oz converts to 2 375 lb 6 oz 16 oz 375 lb 3 Perform an ice production check using the formula below 1 Freeze Time Harvest Time Total Cycle Time 2 1440 Minutes in 24 Hrs Total Cycle Time Cycles per Day 3 x Weight of One Harvest Cycles per Day Actua...

Page 53: ...st 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 are not vented Run and vent drains according to the Installation Manual ...

Page 54: ...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 plugged if used Install a new water filter Vent tube is not installed on water outlet drain See Installation Instructions Hoses fittings etc are leaking water Repair replace as needed Water valve is stuck open...

Page 55: ... Routing Normal Ice Formation Ice forms across the entire evaporator surface At the beginning of the Freeze cycle it may appear that more ice is forming on the inlet of the evaporator than at the outlet At the end of the Freeze cycle ice formation at the outlet will be close to or just a bit thinner than ice formation at the inlet The dimples in the cubes at the outlet of the evaporator may be mor...

Page 56: ...rator reaches the correct thickness but the outlet of the evaporator already has 1 2 to 1 of ice formation Extremely Thin at Evaporator Inlet There is no ice or a considerable 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 evaporator No Ice Formation The ice...

Page 57: ...e evaporator outlet tubing does not exit directly at the top of the evaporator but exits several inches below the top of the evaporator Extremely Thin at the Evaporator Outlet will first be visible several inches below the top of the evaporator Extremely Thin at Evaporator Inlet will first be visible at the bottom of the evaporator ICE ICE Thin at Inlet Thin at Outlet Outlet Inlet ...

Page 58: ...les control board light SL 1 light will flash on off at 1 second intervals If 6 consecutive 60 minute freeze cycles occur the ice machine stops and the SL 1 light on the control board will be on continuously Safety Limit 2 If the harvest time reaches 3 5 minutes the control board automatically returns the ice machine to the freeze cycle If three consecutive 3 5 minute harvest cycles occur the SL 2...

Page 59: ...achine stops for 30 minutes when the water inlet valve is energized for 4 minutes and the harvest float valve didn t open Control board lights SL 1 and SL 2 will flash on off at 1 second intervals The ice machine automatically restarts at the end of the 30 minute delay period and stops flashing the control board lights If 100 consecutive failures occur the ice machine stops and the SL 1 SL 2 light...

Page 60: ... is indicated by both SL 1 SL 2 flashing After safety limit indication the ice machine will restart and run until a safety limit is exceeded again Safety Limit Notes 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 switch is cycled OFF and then ON prior to reaching the 100...

Page 61: ...nspection Checklist on page 53 Water System Float switch or water escaping water trough Low water pressure 20 psig min High water pressure 80 psig max High water temperature 90 F 32 2 C max Clogged water distribution tube Dirty defective water inlet valve Defective water pump Electrical System Harvest cycle not initiated electrically Contactor not energizing Compressor electrically non operational...

Page 62: ...stem Non OEM components Improper refrigerant charge Defective compressor TXV starving or flooding check bulb mounting Non condensible in refrigeration system Plugged or restricted high side refrigerant lines or component Defective harvest valve ...

Page 63: ...ystem Water area evaporator dirty Dirty defective water dump valve Vent tube not installed on water outlet drain Water freezing behind evaporator Plastic extrusions and gaskets not securely mounted to the evaporator Electrical System Bin switch defective Premature harvest Refrigeration System Non OEM components Improper refrigerant charge Defective harvest valve TXV flooding check bulb mounting De...

Page 64: ... Checklist Improper installation Refer to Installation Visual Inspection Checklist on page 53 Water System Water dump valve Harvest float valve dirty or defective Low water pressure 20 psig min Dirty defective water filter when used Loss of water from sump area Dirty defective water inlet valve Electrical System Water inlet valve coil defective Harvest float valve defective ...

Page 65: ...ures Freeze Cycle ______ Harvest Cycle ______ 3 Perform an actual discharge pressure check Freeze Cycle PSIG Harvest Cycle PSIG Beginning of Cycle __________ __________ Middle of Cycle __________ __________ End of Cycle __________ __________ 4 Compare the actual discharge pressure Step 3 with the published discharge pressure Step 2 The discharge pressure is normal when the actual pressure falls wi...

Page 66: ...denser Air Flow High inlet air temperature Condenser discharge air re circulation Dirty condenser fins Defective fan cycling control Defective fan motor Improper Refrigerant Charge Overcharged Non condensible in system Wrong type of refrigerant Other Non OEM components in system High side refrigerant lines component restricted before mid condenser ...

Page 67: ... the items listed in the checklists Analyzing Suction Pressure The suction pressure gradually drops throughout the freeze cycle The actual suction pressure and drop rate changes as the air and water temperature 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 68: ... 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 beginning middle and end of the freeze cycle Note the times at which the readings are taken Example Manifold gauges were connected to the example ice machine and suction pressure readings taken as follows __...

Page 69: ...3 Discharge Pressure Discharge pressure is too high and is affecting suction pressure refer to Discharge Pressure High Checklist on page 66 Improper Refrigerant Charge Overcharged Wrong type of refrigerant Non condensible in system Other Non OEM components in system Harvest valve leaking TXV flooding check bulb mounting Defective compressor ...

Page 70: ...e 66 Improper Refrigerant Charge Undercharged Wrong type of refrigerant Other Non OEM components in system Improper water supply over evaporator refer to Water System Checklist on page 54 Loss of heat transfer from tubing on back side of evaporator Restricted plugged liquid line drier Restricted plugged tubing in suction side of refrigeration system TXV starving NOTE Do not limit your diagnosis to...

Page 71: ...cle The 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 evaporator in the harvest cycle During the harvest cycle the harvest valve is energized open allowing refrigerant gas from the discharge line of the compressor to flow into the evaporator The hea...

Page 72: ...alve remaining partially open during the freeze cycle can be similar to symptoms of an expansion valve or compressor problem Symptoms are dependent on the amount of leakage in the freeze cycle A small amount of leakage will cause increased freeze times and an ice fill pattern that is Thin at the Outlet but fills in at the end of the cycle As the amount of leakage increases the length of the freeze...

Page 73: ... 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 the compressor discharge line nWarning The inlet of the harvest valve and the compressor discharge line could be hot enough to burn your hand Just touch them momentarily 4 Compare the temperature of th...

Page 74: ...perature 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 entirely hot the problem is not a harvest valve leaking but rather something causing the compressor and the entire ice machine to get hot Both the inlet of the harvest valve and the compressor discharge line...

Page 75: ...e 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 readings on curved copper lines 2 Attach the temperature meter sensing device to the copper lines entering and leaving the evaporator Importan Do not simply insert the sensing device under the insulation It mus...

Page 76: ...r 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 the condenser lower discharge line temperatures at the compressor Regardless of ambient temperature the freeze cycle discharge line temperature will be higher than 150 F 66 C on a normally operating ice ...

Page 77: ... 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 discharge line temperature that decreases each cycle Verify the expansion valve sensing bulb is 100 insulated and sealed airtight Condenser air contacting an incorrectly insulated sensing bulb will cause ove...

Page 78: ...ts 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 list four different defects that may affect the ice machine s operation NOTE A low on charge ice machine and a starving expansion valve have very similar characteristics and are listed under the same column ...

Page 79: ...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 appear bad Correct problems as they are found If the operational problem is found it is not necessary to complete the remaining procedures Step 2 Add the check marks listed under each of the four columns Note...

Page 80: ...e 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 refrigerant procedures must still be followed Change the liquid line drier evacuate the system and weigh in the proper charge If the problem is not corrected by adding charge the expansion valve is faulty C...

Page 81: ...e production________________ Calculated actual 24 hour ice production_______________ NOTE The ice machine is operating properly if the ice fill pattern is normal and ice production is within 10 of charted capacity Installation and Water System All installation and water related problems must be corrected before proceeding with chart ...

Page 82: ...or or No ice formation on entire evaporator Ice formation is normal or Ice formation is extremely thin on the bottom of evaporator or No ice formation on evaporator Ice formation is normal or No ice formation on entire evaporator Safety Limits Refer to Analyzing Safety Limits to eliminate all non refrigeration problems Stops on safety limit 1 or 2 Stops on safety limit 1 Stops on safety limit 1 or...

Page 83: ...to eliminate problems and or components not listed on this table before proceeding Freeze Cycle Suction Pressure ________ ______ ______ 1 minute Middle End If suction pressure is High or Low refer to freeze cycle high or low suction pressure problem checklist to eliminate problems and or components not listed on this table before proceeding Suction pressure is High Suction pressure is Low Suction ...

Page 84: ...ompressor 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 line temp 150 F 66 C or higher at the end of freeze cycle Discharge line temp less than 150 F 66 C at the end of freeze cycle Discharge line temp 150 F 66 C or higher at the end of freeze cycle Final Ana...

Page 85: ...all times Removing the control board fuse or cycling the toggle switch Off On will not remove the power supplied to the control board Check Procedure 1 If the curtain light is on with the water curtain closed the fuse is good nWarning Disconnect electrical power to the entire ice machine before proceeding 2 Remove the fuse Check the resistance across the fuse with an ohmmeter Reading Result Open O...

Page 86: ...wn for 30 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 water curtain As the water curtain swings back to the operating position the bin switch closes and the ice machine restarts Importan The ice damper must be up bin switch closed to start ice making Check Procedure 1 Cycle the toggl...

Page 87: ...3 Cycle the bin switch open and closed numerous times by opening and closing the water curtain NOTE To prevent misdiagnosis Always use the water curtain magnet to cycle the switch a larger or smaller magnet will affect switch operation Watch for consistent readings when the bin switch is cycled open and closed bin switch failure could be erratic ...

Page 88: ...chine uses two float switches Ice Thickness Float Indicates the water level has been reached Harvest Float Indicates a harvest cycle needs to be initiated Initial testing can be performed by viewing the control board light s while raising and lowering the float The corresponding control board light must turn on and off when the float is raised and lowered Harvest Float Switch A The light must be o...

Page 89: ...loat switch wire 3 Place the float in the down position The float switch must be closed 4 Place the float in the up position The float switch must be open 5 If the float tests good ohm the interconnecting wires to the control board and inspect connectors NOTE Make adjustments with the ice machine in the off position Making adjustments during the freeze cycle may produce an initial sheet of ice tha...

Page 90: ...m 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 there will be a resistance reading between S and R and open readings between C and S and between C and R Allow the compressor to cool then check the readings again Check Motor Windings to Ground Check continuity betwe...

Page 91: ...ressures 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 start components Compressor Drawing High Amps The continuous amperage draw on start up should not be near the maximum fuse size indicated on the serial tag The wiring must be correctly sized to minimize voltage drop at compressor start up The volta...

Page 92: ... 2654 kPa 5 305 psig 5 2103 kPa 5 Check Procedure Disconnect electrical power to the ice machine at the electrical service disconnect Verify fan motor windings are not open or grounded and fan spins freely Connect manifold gauge to ice machine Hook voltmeter in parallel across the fan cycle control leaving wires attached Reconnect electrical power to the ice machine and Cycle the toggle switch On ...

Page 93: ...he 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 Move toggle switch to ON 6 No water or air flowing through the condenser will cause the HPCO control to open because of excessive pressure Watch the pressure gauge and record the cut out pressure nWarning If discharge pres...

Page 94: ...nctions at night and or fails whenever the outdoor temperature drops A Safety limit is stored in control board memory Refrigerant loss and ambient temperature are directly related to each other As the ambient temperature drops more refrigerant is stored in the condenser When the refrigerant charge and ambient temperature create an undercharge of refrigerant in the freeze cycle the receiver dip tub...

Page 95: ...irectly to the receiver HARVEST CYCLE OPERATION Remote Condenser Models The head pressure control cycles into full bypass due to the pressure drop when the harvest valve opens Refrigerant flows from the compressor to the evaporator through the harvest valve and the head pressure valve is out of the circuit Diagnostics FREEZE CYCLE REMOTE CONDENSER 1 Determine if the coil is clean 2 Determine the a...

Page 96: ...and the ice machine malfunctions Lower ambient conditions can be simulated by rinsing the condenser with cool water during the freeze cycle Condition Probable Cause Corrective Measure Discharge Pressure High Liquid Line Temperature Hot Valve stuck in bypass Replace valve Discharge Pressure Low Liquid Line Temperature Cold Valve not bypassing Replace valve Discharge Pressure Low Liquid Line Tempera...

Page 97: ...rvest is displayed Harvest cycle suction pressure is low Harvest cycle discharge pressure is low Liquid line entering receiver feels warm to hot in the freeze cycle Overcharge Symptoms Safety limit 2 in control board memory a flashing triangle alert and after pressing left arrow Long Harvest is displayed Harvest cycle discharge pressure is normal Freeze cycle time suction and discharge pressure ar...

Page 98: ...enoid This is an electrically operated valve which opens when energized and closes when de energized Harvest pressure regulating valve HPR valve This is a pressure regulating valve which modulates open and closed based on the refrigerant pressure at the outlet of the valve The valve closes completely and stops refrigerant flow when the pressure at the outlet rises above the valve setting HPR VALVE...

Page 99: ... and closed raising the suction pressure high enough to sustain heat for the harvest cycle without allowing refrigerant to condense to liquid in the evaporator In general harvest cycle suction pressure rises then stabilize Exact pressures vary from model to model Refer to cycle time 24 hour ice production and operational pressure charts HPR DIAGNOSTICS Steps 1 through 5 can be quickly verified wit...

Page 100: ...nnect refrigeration manifold gauge set to the access valves on the front of the ice machine Establish baseline by recording suction and discharge pressure and freeze harvest cycle times Refer to Freeze Cycle Refrigeration System Operational Analysis Tables for data collection detail 7 Freeze cycle Head Pressure is in the range indicated in the cycle time 24 hour ice production and operational pres...

Page 101: ...rease discharge pressure 4 Determine the temperature of the liquid line entering the receiver by feeling it This line is normally warm body temperature 5 Using the information gathered refer to the list for diagnosis Problem Freeze Cycle VALVE NOT MAINTAINING DISCHARGE PRESSURE Valve incorrectly set dirty or defective Adjust clean or replace valve DISCHARGE PRESSURE EXTREMELY HIGH LIQUID LINE ENTE...

Page 102: ...claim 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 product specifications are met This term usually implies the use of processes and procedures available only at a reprocessing or manufacturing facility Chemical analysis is the key requirement in this defi...

Page 103: ...se 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 Reclaimed Refrigerant Must be of original nameplate type Must meet ARI Standard 700 latest edition specifications 3 Recovered or Recycled Refrigerant Must be recovered or recycled in accordance with current loca...

Page 104: ...acuated 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 Remote Condenser Model Procedure on page 94 to test for contamination 5 Substitute or Alternative Refrigerant Must use only Koolaire approved alternative refrigerants Must follow Koolaire published conver...

Page 105: ...only a Koolaire O E M liquid line filter drier to prevent voiding the warranty CONNECTIONS 1 Suction side of the compressor through the suction service valve 2 Discharge side of the compressor through the discharge service valve SELF CONTAINED RECOVERY EVACUATION 1 Cycle the toggle switch Off 2 Install manifold gauge set and recovery unit or two stage vacuum pump 3 Perform recovery or evacuation A...

Page 106: ...s valves can result in immediate compressor failure All refrigerant must be added through the refrigeration access valve on the front of the ice machine NOTE Manifold gauge set must be removed properly to ensure that no refrigerant contamination or loss occurs 6 Make sure that all of the vapor in the charging hoses is drawn into the ice machine before disconnecting the charging hoses A Run the ice...

Page 107: ...re or residue from compressor burnout entering the refrigeration system Inspection of the refrigerant usually provides the first indication of system contamination Obvious moisture or an acrid odor in the refrigerant indicates contamination If harmful levels of contamination are suspected perform the following procedure 1 Remove the refrigerant charge from the ice machine 2 Remove the compressor f...

Page 108: ...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 test kit or acid oil test shows harmful acid content No burnout deposits in open compressor lines Mild contamination cleanup procedure Severe Compressor Burnout symptoms Oil is discolored acidic and sme...

Page 109: ...e 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 5 psig B Pull vacuum to 500 microns Break the vacuum with dry nitrogen and sweep the system Pressurize to a minimum of 5 psig C Change the vacuum pump oil D Pull vacuum to 500 microns Run the vacuum pump for 1 2 hour on self contained models 1 ho...

Page 110: ... components when used 7 Install suction line filter drier in front of compressor 8 Install an access valve at the inlet and outlet of the suction line filter drier if valves are not present 9 Install a new liquid line drier 10 Follow 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 s...

Page 111: ...d line drier if necessary 14 Follow normal evacuation procedures REPLACING PRESSURE CONTROLS WITHOUT REMOVING REFRIGERANT CHARGE This procedure reduces repair time and cost Use it when any of the following components require replacement and the refrigeration system is operational and leak free Fan cycle control High pressure cut out control High side access valve Low side access valve Importan Thi...

Page 112: ...Solder the replacement component in place Allow the solder joint to cool 5 Remove the pinch off tool 6 Re round the tubing Position the flattened tubing in the proper hole in the pinch off tool Tighten the wing nuts until the block is tight and the tubing is rounded NOTE The pressure controls will operate normally once the tubing is re rounded Tubing may not re round 100 FIG A PINCHING OFF TUBING ...

Page 113: ...A N A N A KT0300 50Hz 17 oz 482 g N A N A N A KT0400 60Hz 18 oz 510 g 14 oz 397 g N A N A KT0400 50Hz 21 oz 595 g 14 oz 397 g N A N A KT0420 50 60Hz 16 oz 454 g 14 oz 397 g N A N A KT0500 50 60Hz 18 oz 510 g 14 oz 397 g N A N A KT0700 60 Hz 22 oz 624 g 7 oz 198 g N A N A KT1000 60 Hz 28 oz 794 g 26 oz 624 g 7 lbs 3 2 kg 2 lbs 907 g KT1000 50 Hz 44 oz 1247 g N A N A N A KT1700 60 Hz 46 oz 1304 g 32...

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Page 115: ...hin 10 of the chart are considered normal This is due to variances in water and air temperature Actual temperatures will seldom match the chart exactly Refer to Operational Analysis Chart for the list of data that must be collected for refrigeration diagnostics Zero out manifold gauge set before obtaining pressure readings to avoid mis diagnosis Discharge and suction pressure are highest at the be...

Page 116: ...tering Condenser F C Water Temperature F C 50 10 70 21 90 32 70 21 330 280 250 80 27 285 250 230 90 32 260 230 210 100 38 235 215 195 110 43 210 200 180 Based on average ice slab weight of 3 40 3 90 lb 1 54 1 77 kg 230 50 1 production is approximately 12 lower than 230 60 1 Operating Pressures Air Temp Entering Condenser F C Freeze Cycle Harvest Cycle Discharge Pressure PSIG Suction Pressure PSIG ...

Page 117: ...ntering Condenser F C Water Temperature F C 50 10 70 21 90 32 70 21 440 410 350 80 27 420 385 315 90 32 390 345 300 100 38 360 310 275 110 43 315 285 265 Based on average ice slab weight of 3 40 3 90 lb 1 54 1 77 kg 230 50 1 production is approximately 12 lower than 230 60 1 Operating Pressures Air Temp Entering Condenser F C Freeze Cycle Harvest Cycle Discharge Pressure PSIG Suction Pressure PSIG...

Page 118: ...70 21 425 430 370 80 27 395 370 350 90 32 390 360 345 100 38 385 345 320 110 43 370 330 305 Based on average ice slab weight of 3 40 3 90 lb 1 54 1 77 kg Water regulating valve set to maintain 320 PSIG discharge pressure Condenser Water usage per 100 lbs ice 170 gal 45 kg 644 L 230 50 1 production is approximately 12 lower than 230 60 1 Operating Pressures Air Temp Around Ice Machine F C Freeze Cy...

Page 119: ...tering Condenser F C Water Temperature F C 50 10 70 21 90 32 70 21 440 410 350 80 27 420 385 315 90 32 390 350 300 100 38 360 310 275 110 43 315 285 265 Based on average ice slab weight of 3 40 3 90 lb 1 54 1 77 kg 230 50 1 production is approximately 12 lower than 230 60 1 Operating Pressures Air Temp Entering Condenser F C Freeze Cycle Harvest Cycle Discharge Pressure PSIG Suction Pressure PSIG ...

Page 120: ...70 21 425 430 370 80 27 395 370 350 90 32 390 360 345 100 38 385 345 320 110 43 370 330 305 Based on average ice slab weight of 3 40 3 90 lb 1 54 1 77 kg Water regulating valve set to maintain 330 PSIG discharge pressure Condenser Water usage per 100 lbs ice 170 gal 45 kg 644 L 230 50 1 production is approximately 12 lower than 230 60 1 Operating Pressures Air Temp Around Ice Machine F C Freeze Cy...

Page 121: ...tering Condenser F C Water Temperature F C 50 10 70 21 90 32 70 21 515 425 400 80 27 450 420 375 90 32 420 400 350 100 38 385 350 325 110 43 365 325 300 Based on average ice slab weight of 4 125 4 75 lb 1 87 2 15 kg 230 50 1 production is approximately 12 lower than 230 60 1 Operating Pressures Air Temp Entering Condenser F C Freeze Cycle Harvest Cycle Discharge Pressure PSIG Suction Pressure PSIG...

Page 122: ... 90 32 475 420 370 100 38 465 415 365 110 43 455 410 360 Based on average ice slab weight of 4 125 4 75 lb 1 87 2 15 kg Water regulating valve set to maintain 330 PSI discharge pressure Condenser Water usage per 100 lbs ice 160 gal 45 kg 606 L 230 50 1 production is approximately 12 lower than 230 60 1 Operating Pressures Air Temp Around Ice Machine F C Freeze Cycle Harvest Cycle Discharge Pressur...

Page 123: ...ng Condenser F C Water Temperature F C 50 10 70 21 90 32 70 21 675 585 550 80 27 625 555 500 90 32 575 530 450 100 38 525 480 400 110 43 475 430 375 Based on average ice slab weight of4 125 4 75 lb 1 87 2 15 kg 230 50 1 production is approximately 12 lower than 230 60 1 Operating Pressures Air Temp Entering Condenser F C Freeze Cycle Harvest Cycle Discharge Pressure PSIG Suction Pressure PSIG Disc...

Page 124: ...0 610 535 80 27 640 595 525 90 32 630 550 515 100 38 600 525 505 110 43 585 500 475 Based on average ice slab weight of 4 125 4 75 lb 1 87 2 15 kg Water regulating valve set to maintain 300 PSI discharge pressure Condenser Water usage per 100 lbs ice 140 gal 45 kg 530 L 230 50 1 production is approximately 12 lower than 230 60 1 Operating Pressures Air Temp Around Ice Machine F C Freeze Cycle Harv...

Page 125: ...Entering Condenser F C Water Temperature F C 50 10 70 21 90 32 70 21 890 800 740 80 27 820 760 700 90 32 770 680 640 100 38 710 665 590 110 43 660 585 540 Based on average ice slab weight of 7 25 7 75 lb 3 3 3 5 kg 230 50 1 production is approximately 12 lower than 230 60 1 Operating Pressures Air Temp Entering Condenser F C Freeze Cycle Harvest Cycle Discharge Pressure PSIG Suction Pressure PSIG ...

Page 126: ...2 70 21 835 800 700 80 27 825 805 695 90 32 810 720 690 100 38 800 705 680 110 43 790 695 670 Based on average ice slab weight of 7 25 7 75 lb 3 3 3 5 kg Water regulating valve set to maintain 300 PSI discharge pressure Condenser Water usage per 100 lbs ice 131 gal 45 kg 496 L 230 50 1 production is approximately 12 lower than 230 60 1 Operating Pressures Air Temp Around Ice Machine F C Freeze Cyc...

Page 127: ...er F C Water Temperature F C 50 10 70 21 90 32 20 50 29 10 850 820 810 70 21 845 785 720 80 27 805 745 690 90 32 780 700 660 100 38 735 680 630 110 43 695 635 585 Based on average ice slab weight of 7 25 7 75 lb 3 3 3 5 kg 230 50 1 production is approximately 12 lower than 230 60 1 Operating Pressures Air Temp Entering Condenser F C Freeze Cycle Harvest Cycle Discharge Pressure PSIG Suction Pressu...

Page 128: ...ondenser F C Water Temperature F C 50 10 70 21 90 32 70 21 1800 1690 1610 80 27 1590 1480 1360 90 32 1430 1350 1205 100 38 1305 1215 1080 110 43 1110 1020 965 Based on average ice slab weight of 13 20 14 80 lb 5 99 6 71 kg 230 50 1 production is approximately 12 lower than 230 60 1 Operating Pressures Air Temp Entering Condenser F C Freeze Cycle Harvest Cycle Discharge Pressure PSIG Suction Pressu...

Page 129: ... 1720 1515 80 27 1685 1650 1445 90 32 1670 1460 1410 100 38 1660 1400 1355 110 43 1650 1375 1320 Based on average ice slab weight of 13 20 14 80 lb 5 99 6 71 kg Water regulating valve set to maintain 310 PSIG discharge pressure Condenser Water usage per 100 lbs ice 139 gal 45 kg 526 L 230 50 1 production is approximately 12 lower than 230 60 1 Operating Pressures Air Temp Around Ice Machine F C Fr...

Page 130: ...Water Temperature F C 50 10 70 21 90 32 20 50 29 10 70 21 1650 1565 1460 80 27 1560 1480 1370 90 32 1470 1420 1280 100 38 1380 1345 1190 110 43 1345 1260 1140 Based on average ice slab weight of 13 20 14 80 lb 5 99 6 71 kg 230 50 1 production is approximately 12 lower than 230 60 1 Operating Pressures Air Temp Entering Condenser F C Freeze Cycle Harvest Cycle Discharge Pressure PSIG Suction Pressu...

Page 131: ...efore 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 Fan Motor Run Capacitor Some models do not incorporate fan motor run capacitor Wire Number Designation The number is marked at each end of the wire Multi pin Connection Electrical Box Side Compressor Com...

Page 132: ...L2 GND 22 WHT 21 BLU 20 WHT 99 WHT 77 RED 61 RED 80 WHT 81 WHT 76 BLK 98 GRY 60 BLK 57 GRY 59 ORG 42 ORG 89 PRPL 88 PRPL 58 PRPL 56 WHT 74 WHT 75 WHT 50 BLU C S R 47 YEL 49 RED 48 BLK 55 BLK L1 51 ORG 85 BLK 000014012_00 45 YEL 47 ORG 5 14 56 1 55 17 31 26 3 16 41 19 28 54 18 15 7 11 58 42 25 27 9 ...

Page 133: ...18 Contactor Contacts 19 Control Board 25 Fan Cycle Control 26 Harvest Float Switch 27 Water Level Float Switch 28 Fuse 31 High Pressure Cutout 41 See Control Board Schematic For Detail 42 Solenoid Valve Harvest 54 Transformer 55 Water Dump Valve 56 Water Inlet Valve 58 Water Pump Wire Colors BLK Black BLU Blue BRN Brown GRY Grey ORG Orange PRPL Purple RED Red WHT White YEL Yellow Refer to control...

Page 134: ...HT 21 BLU 20 WHT 99 WHT 77 RED 61 RED 80 WHT 81 WHT 76 BLK 98 GRY 60 BLK 57 GRY 59 ORG 42 ORG 89 PRPL 88 PRPL 58 PRPL 56 WHT 74 WHT 75 WHT 50 BLU C S R 47 YEL 49 RED 48 BLK 55 BLK L1 51 ORG 85 BLK 000014012_00 45 YEL 47 ORG 5 14 56 1 55 17 31 26 3 16 41 19 28 54 18 15 7 11 58 42 25 27 9 ...

Page 135: ...ntactor Contacts 19 Control Board 25 Fan Cycle Control 26 Harvest Float Switch 27 Water Level Float Switch 28 Fuse 31 High Pressure Cutout 41 See Control Board Schematic For Detail 42 Solenoid Valve Harvest 54 Transformer 55 Water Dump Valve 56 Water Inlet Valve 58 Water Pump Wire Colors BLK Black BLU Blue BRN Brown GRY Grey ORG Orange PRPL Purple RED Red WHT White YEL Yellow WHT White Refer to co...

Page 136: ...77 RED 61 RED 79 WHT 81 WHT 76 BLK 98 GRY 60 BLK 57 GRY 59 ORG 42 ORG 89 PRPL 88 PRPL 58 PRPL 56 WHT 74 WHT 75 WHT 50 BLU C S R 45 YEL RED 48 BLK 55 BLK L1 51 ORG F1 000011562_03 YEL 83 ORG 81 WHT 78 RED 82 WHT 80 WHT F2 L1 L2 GND 4 5 14 56 42 55 17 31 26 3 16 41 19 28 54 9 18 15 7 11 58 44 27 45 ...

Page 137: ...d 26 Harvest Float Switch 27 Water Level Float Switch 28 Fuse 31 High Pressure Cutout 41 See Control Board Schematic For Detail 42 Solenoid Valve Harvest 44 Solenoid Valve Harvest Pressure Regulating 45 Solenoid Valve Liquid Line Solenoid 54 Transformer 55 Water Dump Valve 56 Water Inlet Valve 58 Water Pump Wire Colors BLK Black BLU Blue BRN Brown GRY Grey ORG Orange PRPL Purple RED Red WHT White ...

Page 138: ... 77 RED 61 RED 87 WHT 81 WHT 25 RED 76 BLK 60 BLK 57 GRY 42 ORG 89 PRPL 88 PRPL 58 PRPL 56 WHT 74 WHT 75 WHT 50 BLU C S R 45 YEL RED BLK 55 BLK L1 51 ORG 000012160_04 YEL 83 ORG 81 WHT 88 RED 80 WHT 59 ORG 26 WHT 98 GRY 85 BLK RED BLK WHT BRN 5 14 56 1 42 55 17 31 26 3 16 41 19 28 54 9 18 15 7 11 58 43 25 27 ...

Page 139: ...ntacts 19 Control Board 25 Fan Cycle Control 26 Harvest Float Switch 27 Water Level Float Switch 28 Fuse 31 High Pressure Cutout 41 See Control Board Schematic For Detail 42 Solenoid Valve Harvest Left Hand 43 Solenoid Valve Harvest Right Hand 54 Transformer 55 Water Dump Valve 56 Water Inlet Valve 58 Water Pump Wire Colors BLK Black BLU Blue BRN Brown GRY Grey ORG Orange PRPL Purple RED Red WHT W...

Page 140: ...LU 20 BLU 99 WHT 77 RED 61 RED 87 WHT 81 WHT 25 RED 76 BLK 60 BLK 57 GRY 42 ORG 89 PRPL 88 PRPL 58 PRPL 56 WHT 74 WHT 75 WHT 85 BLK 55 BLK L1 000012160_04 88 RED 80 WHT 59 ORG 26 WHT 98 GRY RED BLK WHT BRN L3 L2 51 ORG L2 L3 5 81 WHT 14 56 1 42 55 17 31 26 3 16 41 19 28 54 15 58 43 27 18 25 ...

Page 141: ...tacts 19 Control Board 25 Fan Cycle Control 26 Harvest Float Switch 27 Water Level Float Switch 28 Fuse 31 High Pressure Cutout 41 See Control Board Schematic For Detail 42 Solenoid Valve Harvest Left Hand 43 Solenoid Valve Harvest Right Hand 54 Transformer 55 Water Dump Valve 56 Water Inlet Valve 58 Water Pump Wire Colors BLK Black BLU Blue BRN Brown GRY Grey ORG Orange PRPL Purple RED Red WHT Wh...

Page 142: ...142 Part Number STH063 9 17 KT1700 1PH REMOTE AIR COOLED CONDENSER 000012161_03 11 56 1 42 55 17 31 26 3 16 41 19 28 54 58 43 27 7 45 44 5 9 14 15 18 ...

Page 143: ...tacts 19 Control Board 25 Fan Cycle Control 26 Harvest Float Switch 27 Water Level Float Switch 28 Fuse 31 High Pressure Cutout 41 See Control Board Schematic For Detail 42 Solenoid Valve Harvest Left Hand 43 Solenoid Valve Harvest Right Hand 54 Transformer 55 Water Dump Valve 56 Water Inlet Valve 58 Water Pump Wire Colors BLK Black BLU Blue BRN Brown GRY Grey ORG Orange PRPL Purple RED Red WHT Wh...

Page 144: ...144 Part Number STH063 9 17 KT1700 3PH REMOTE AIR COOLED CONDENSER 000012161_3 14 56 1 42 55 17 31 26 3 16 41 19 28 54 58 43 27 18 45 44 5 15 ...

Page 145: ...tacts 19 Control Board 25 Fan Cycle Control 26 Harvest Float Switch 27 Water Level Float Switch 28 Fuse 31 High Pressure Cutout 41 See Control Board Schematic For Detail 42 Solenoid Valve Harvest Left Hand 43 Solenoid Valve Harvest Right Hand 54 Transformer 55 Water Dump Valve 56 Water Inlet Valve 58 Water Pump Wire Colors BLK Black BLU Blue BRN Brown GRY Grey ORG Orange PRPL Purple RED Red WHT Wh...

Page 146: ...146 Part Number STH063 9 17 ELECTRONIC CONTROL BOARD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 19 18 20 21 23 24 25 22 ...

Page 147: ...lean 6 Thermistor 7 Thermistor 8 Thermistor 9 LED Water Fill Valve 10 LED Harvest Float 11 LED Water Level Float 12 LED Bin Switch 13 LED Safety Limit 2 14 LED Safety Limit 1 15 LED Harvest 16 LED Test Mode 17 Fuse 18 Motor Connector 19 EC Fan Motor Connector 20 Bin Switch Connector 21 Float Switch Water Level 22 Float Switch Harvest 23 Thermistor 2 24 Test Switch 25 Thermistor 1 ...

Page 148: ...ONTAINED AIR OR WATER COOLED X 1 2 3 4 5 6 7 8 9 Number Component 1 Compressor 2 Condenser Air or Water Cooled 3 Receiver Water Cooled Only 4 Liquid Line Filter Drier 5 Heat Exchanger 6 TXV Thermostatic Expansion Valve 7 Evaporator 8 Strainer 9 Harvest Solenoid Valve ...

Page 149: ...er 3 Condenser Remote Air Cooled 4 Head Pressure Control Valve 5 Liquid Line Check Valve 6 Receiver 7 Liquid Line Filter Drier 8 Liquid Line Solenoid Valve 9 Heat Exchanger 10 TXV Thermostatic Expansion Valve 11 Evaporator 12 Strainer 13 Harvest Solenoid Valve 1 2 3 4 5 6 7 8 9 10 11 12 13 15 16 ...

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Page 151: ......

Page 152: ...dge designs and lean manufacturing tactics are powered by deep knowledge operator insights and culinary expertise All of our products are backed by KitchenCare our aftermarket repair and parts service WWW WELBILT COM CLEVELAND CONVOTHERM DELFIELD FITKITCHEN FRYMASTER GARLAND KOLPAK LINCOLN MANITOWOC MERCO MERRYCHEF MULTIPLEX 2017 Welbilt Inc except where explicitly stated otherwise All rights rese...

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