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–142–

Freeze Cycle Discharge Pressure Low Checklist

Problem

Cause

Improper Installation

Refer to “Installation/Visual Inspection Checklist” 

Improper Refrigerant Charge

Undercharged

Wrong type of refrigerant

Other

Non-Manitowoc components in system

High side refrigerant lines/component restricted 
(before mid-condenser)

Defective head pressure control valve

Defective fan cycle control (Not used on CVD675/
CVD1476)

Water regulating valve incorrectly set (CVD1476 
only)

NOTE: 

Do not limit your diagnosis to only 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 
published suction pressure to the published Freeze 
cycle time. 

NOTE: 

Analyze discharge pressure before analyzing 

suction pressure. High or low discharge pressure may 
be causing high or low suction pressure.

Содержание CVD0675

Страница 1: ...anitowoc This manual is updated as new information and models are released Visit our website for the latest manual www manitowocice com America s 1 Selling Ice Machine Q Model QuietQube Ice Machines Part Number 80 0099 9 6 11 ...

Страница 2: ......

Страница 3: ...st you as you work Throughout this handbook you will see the following types of procedural notices Warning Text in a Warning box alerts you to a potential personal injury situation Be sure to read the Warning statement before proceeding and work carefully Caution Text in a Caution box alerts you to a situation in which you could damage the equipment Be sure to read the Caution statement before pro...

Страница 4: ...ered by this handbook do not proceed contact Manitowoc Foodservice Group We will be happy to provide assistance Important Routine adjustments and maintenance procedures outlined in this handbook are not covered by the warranty Warning PERSONAL INJURY POTENTIAL Do not operate equipment that has been misused abused neglected damaged or altered modified from that of original manufactured specificatio...

Страница 5: ...d Section Clearance Requirements 6 Q0600C Q0800C Q1000C 6 SU1000 SerVend UC 300 6 Stacking Two Ice Machines on a Single Storage Bin 7 Ice Deflector 7 Location of CVD Condensing Unit 8 Condensing Unit Clearance Requirements 8 Ice Machine Head Section Water Supply and Drains 9 Potable Water Supply 9 Potable Water Inlet Lines 9 Drain Connections 10 Water cooled condenser water supply and drains 11 Co...

Страница 6: ...ssor Rotation CVD2075 Only 29 Condensing Unit Heat of Rejection 29 Operational Checks General 30 Water Level 30 Q0600C Q0800C Q1000C QDUAL 30 Q1400C SU1000C 31 Ice Thickness Check 32 Harvest Sequence Water Purge 33 Interior Cleaning and Sanitizing AlphaSanÒ 36 Cleaning Procedure 37 Sanitizing Procedure 39 Automatic Cleaning System AuCS Accessory 41 Removal of Parts for Cleaning or Sanitizing 43 Re...

Страница 7: ...75 CVD2075 72 Ice Making Sequence of Operation Q0600C Q0800C Q1000C SU1000C 73 Initial Start Up or Start Up After Automatic Shut Off 73 Freeze Sequence 74 Harvest Sequence 75 Automatic Shut Off 76 Q1400C 79 Initial Start Up or Start Up After Automatic Shut Off 79 Freeze Sequence 79 Harvest Sequence 80 QDUAL 84 Initial Start Up or Start Up After Automatic Shut Off 84 Freeze Sequence 85 Harvest Sequ...

Страница 8: ...ater Curtain Removal Notes 98 ICE OFF CLEAN Toggle Switch 99 Function 99 Specifications 99 Check Procedure 99 Ice Thickness Probe Harvest Initiation 100 How the Probe Works 100 Ice Thickness Check 100 Ice Thickness Probe Diagnostics 101 Diagnosing Ice Thickness Control Circuitry 102 Water Level Control Circuitry 105 Diagnosing an Ice Machine Head Section that Will Not Run 112 Diagnosing a Condensi...

Страница 9: ...ormal Operation 146 Cool Vapor Valve Analysis 147 Freeze Cycle Suction Line Temperature Analysis 148 Refrigeration Component Diagnostic Charts 150 General 150 Procedure 150 Final Analysis 150 Refrigeration Component Diagnostic Charts 152 Single Expansion Valve Q0600C 0800C Q1000C SU1000C 152 Dual Expansion Valve Q1400C QDUAL 157 Pressure Control Specifications and Diagnostics 160 Headmaster Contro...

Страница 10: ...1400C CVD1476 Remote water Cooled 182 QDUAL CVD1875 Remote Air Cooled 183 QDUAL CVD2075 Remote air Cooled 184 Refrigerant Recovery Evacuation System Contamination Cleanup 188 General 188 Determining Severity of Contamination 188 Cleanup Procedure 190 Replacing Pressure Controls Without Removing Refrigerant Charge 193 Filter Driers 195 Liquid Line Filter Drier 195 Suction Line Filter 196 Total Syst...

Страница 11: ...5 CVD1285 SU1024YC SerVend UC 300 Dispenser CVD1075 QR1470C QD1472C QY1474C CVD1375 CVD1475 CVD1476 QRDUALC QDDUALC QYDUALC CVD1875 CVD2075 For 3 phase electrical option add the number 3 to end of model number CVD10753 Important The ice machine sequence of operation for QuietQube Ice Machines will differ Verify the correct sequence of operation is being followed for the model you are working on ...

Страница 12: ... CARD They are also listed on the MODEL SERIAL NUMBER DECAL affixed to the ice machine Warning Manitowoc QuietQube Ice Machines require the ice storage bin to incorporate an ice deflector when installing with non Manitowoc ice storage systems or Manitowoc F style bins Prior to using a non Manitowoc ice storage system with Manitowoc ice machines contact the manufacturer to assure their ice deflecto...

Страница 13: ...e is installed If the OWNER WARRANTY REGISTRATION CARD is not returned Manitowoc will use the date of sale to the Manitowoc Distributor as the first day of warranty coverage for your new ice machine Important Complete and mail the OWNER WARRANTY REGISTRATION CARD as soon as possible to validate the installation date ...

Страница 14: ...on the date of the original installation Labor 1 Labor required to repair or replace defective components is covered for three 3 years from the date of original installation 2 The evaporator is covered by an additional two 2 year five years total labor warranty beginning on the date of the original installation Exclusions The following items are not included in the ice machine s warranty coverage ...

Страница 15: ...is intended exclusively for commercial application No warranty is extended for personal family or household purposes Authorized Warranty Service To comply with the provisions of the warranty a refrigeration service company qualified and authorized by your Manitowoc Distributor or a Contracted Service Representative must perform the warranty repair NOTE If the dealer you purchased the ice machine f...

Страница 16: ...nerating equipment or in direct sunlight ICE MACHINE HEAD SECTION CLEARANCE REQUIREMENTS Q0600C Q0800C Q1000C Top Sides There is no minimum clearance required although 5 in 127 mm is recommended for efficient operation and servicing only Back 1 in 25 mm required when routing electrical inlet water inlet and refrigeration tubing out of the top of the unit 5 in 127 mm required when routing all conne...

Страница 17: ...laced side by side on a 60 in Manitowoc F style bin ICE DEFLECTOR QDUAL ice machines mounted on an ice dispenser do not require an ice deflector QDUAL ice machines mounted on an ice storage bin Manitowoc or non Manitowoc require the use of an ice deflector Refer to sales literature to determine the proper kit for your application This kit is necessary to allow access to the shut off valves during ...

Страница 18: ...o 120 F 54 4 C QDUAL CVD1875 CVD2075 CVD1476 only The air temperature must be at least 50 F 10 C but must not exceed 110 F 43 C The location must not allow exhaust fan heat and or grease to enter the condenser The location must not obstruct airflow through or around the condensing unit CONDENSING UNIT CLEARANCE REQUIREMENTS Top Sides There is no minimum clearance required although 6 in 152 mm is r...

Страница 19: ...rictors installed for other equipment are working Check valves on sink faucets dishwashers etc If water pressure exceeds the maximum recommended pressure obtain a water pressure regulator from your Manitowoc Distributor Float Valve 80 psi 551 5 kPa Water Inlet Valve 90 psi 620 4 kPA Install a water shut off valve for ice making potable water Insulate water inlet lines to prevent condensation Impor...

Страница 20: ...arge enough to accommodate drainage from all drains Run separate bin and ice machine drain lines Insulate them to prevent condensation Vent the bin and ice machine drain to the atmosphere Drains must have a union or other suitable means of disconnection from the ice machine when servicing is required The SU1024YC is designed for installation on a SerVend UC 300 dispenser only Refer to the SerVend ...

Страница 21: ...and outlet on cooling tower or closed loop circuits to allow isolation of the water system Water entering the condenser must not exceed 90 F 32 2 C Water flow through the condenser must not exceed 5 gallons 19 liters per minute Allow for a pressure drop of 8 psi 55 kPA between the condenser water inlet and outlet Water exiting the condenser must not exceed 110 F 43 3 C Warning Water pressure at th...

Страница 22: ...tion accumulator Condensate amounts will vary depending on temperature and humidity The condensing unit must be level front to back and side to side to allow the condensate to drain Drain lines must have1 5 inch drop per 5 feet of run 2 5 cm per meter and must not create traps Drain termination must meet applicable codes ...

Страница 23: ...n be identified by Noisy compressor operation Elevated suction pressure Low discharge pressure Compressor trips on overload protector To change compressor rotation reverse exchange locations any two incoming power supply leads Ice Machine Head Section Voltage Phase Cycle Max Fuse Circuit Breaker Total Amps Q0600C Q0800C Q1000C SU1000C Q1400C QDUAL 115 1 60 230 1 50 15 amp 15 amp 1 1 0 6 Important ...

Страница 24: ...19 8 CVD1476 208 230 1 60 208 230 3 60 30 amp 20 amp 15 3 10 8 CVD1875 208 230 1 60 208 230 3 60 230 1 50 40 amp 30 amp 40 amp 21 1 11 0 23 2 CVD2075 208 230 1 60 208 230 3 60 230 1 50 50 amp 40 amp 50 amp 27 1 19 9 29 9 Caution Scroll Compressor Rotation CVD2075 3 Phase Only Correct compressor rotation must be verified at start up Incorrect rotation will result in increased compressor noise and h...

Страница 25: ...etQube Ice Machine CVD Condensing Unit Line Set Q1000C SU1000C UC 300 Q1400C CVD1075 CVD1475 CVD1476 RC 20 RC 30 RC 50 Q0600C Q0800C CVD0675 CVD0875 RC 21 RC 31 RC 51 QDUAL CVD1875 CVD2075 RC 22 RC 32 RC 52 Line Set Suction Line Liquid Line Insulation Thickness RC 20 30 50 3 4 in 19 1 mm 1 2in 12 7 mm Suction Line 1 2 13 mm Liquid Line 1 4 7 mm RC 21 31 51 5 8 in 15 9 mm 3 8 in 9 5 mm RC 22 32 52 ...

Страница 26: ...rant tubing The serial tag on the ice machine indicates the refrigerant charge For line set runs longer than 50 ft 1 lb of additional refrigerant must be added for each 10 ft of line set run The receiver is designed to hold a charge sufficient to operate the ice machine in ambient temperatures between 20 F 28 9 C and 120 F 49 C with line set lengths of up to 100 feet 15 m Caution Never add more th...

Страница 27: ...geration tubing between the Ice Machine Head Section and the CVD Condensing Unit For a roof wall penetration cut a 3 in 76 2 mm circular hole in the wall or roof for routing of refrigeration tubing as required A qualified person must perform all roof penetrations A LINE SET LENGTH Warning Potential Personal Injury Situation The ice machine head section contains the refrigerant charge Installation ...

Страница 28: ...Rise The maximum distance the CVD Condensing Unit can be above the ice machine 15 ft 4 5 m Drop The maximum distance the CVD Condensing Unit can be below the ice machine SV1751 35 FT 10 7 M MAXIMUM DISTANCE SV1750 15 FT 4 5 M MAXIMUM DISTANCE ...

Страница 29: ...to 35 ft 6 4 to 10 7 m Rise The suction line requires an additional oil trap S type to be installed Install the trap as close as possible to midpoint between the ice machine head section and CVD Condensing Unit S Trap Kits are available from Manitowoc refer to chart Caution Do not form unwanted traps in refrigeration lines Never coil excess refrigeration tubing SV1751 21 FT OR MORE RISE ADDITIONAL...

Страница 30: ... trap The service loop is not included when calculating the length rise or drop of the tubing run Do not use hard rigid copper for the service loop Manitowoc S Trap Kit Model S Trap Kit Tubing Size Q0600C Q0800C K00172 5 8 in 15 9 mm Q1000C SU1000C Q1400C K00166 3 4 in 19 1 mm QDUAL K00164 7 8 in 22 2 mm Caution If a line set has a rise followed by a drop another rise cannot be made Likewise if a ...

Страница 31: ...heat during the brazing process Wrap the valves in a wet rag or other type of heat sink prior to brazing Cool braze joint with water immediately after brazing to prevent heat migration to the valve Caution Do not form unwanted traps in refrigeration lines Never coil excess refrigeration tubing Warning The ice machine head section contains refrigerant charge The ice machine head section contains th...

Страница 32: ... unit Remove knockout for preferred location Insert supplied plastic bushings in knockout holes to prevent tubing from contacting sheet metal Use the supplied 90 elbows to route tubing Cut the tubing ends of the suction and liquid lines and braze line sets to the condensing unit Warning The condensing unit ships from the factory pressurized with a 50 50 mixture of nitrogen helium Bleed off pressur...

Страница 33: ...he line set shut off valves located at the back of the ice machine Complete the pressure test verify no leaks are present and remove the nitrogen from the system before connecting the vacuum pump Connect a vacuum pump to both of the line set shut off valves located at the back of the ice machine head section Evacuate to 250 microns or less To completely evacuate the CVD Condensing Unit continue th...

Страница 34: ... valve core removal tools that allow for putting the cores back in without removing vacuum pump hoses must be used if evacuating from the condensing unit side Isolate the vacuum pump from the line set shut off valves and or condensing unit access ports prior to proceeding PT1284 ALTERNATE CONNECTIONS AT CONDENSING UNIT SCHRADER VALVES ...

Страница 35: ...shut off valve B Slowly backseat open turn counterclockwise the liquid line shut off valve C Slowly backseat open turn counterclockwise the receiver service valve SV1762 USE ALLEN WRENCH TO OPEN TURN COUNTERCLOCKWISE LIQUID AND SUCTION LINE SHUT OFF VALVES Q0600C Q0800C Q1000C SV1769c USE ALLEN WRENCH TO OPEN TURN COUNTERCLOCKWISE LIQUID AND SUCTION LINE SHUT OFF VALVES Q1400C QDUAL SUCTION AND LI...

Страница 36: ...ne toggle switch into the ICE position this will allow refrigerant to enter the line set and condensing unit Step 7 Leak check the new line set connections at the ice machine head section condensing unit and S trap as well as all factory joints throughout the entire system Disconnect power to the CVD Condensing Unit Place the ICE OFF CLEAN toggle switch in the ICE position This allows the low side...

Страница 37: ...se insulation thickness The entire suction line set including the suction service valve located on the back of the ice machine requires a minimum of 3 4 in 12 7 mm wall thickness insulation The entire liquid line set requires a minimum of 1 4 in 6 4 mm wall thickness insulation Important To prevent condensation the entire suction line including the shut off valve must be insulated All insulation m...

Страница 38: ...rader valve cap and left side of valve Position the tab between the mounting bracket and rear panel C Fold insulation and hold against right hand side of valve while securing with electrical tape Seal the line set insulation to the shut off valve insulation with electrical tape PREFORMED INSULATION TIGHTEN VALVE CAPS TO SPECIFICATIONS PLACE TAB BETWEEN VALVE BODY AND PANEL FOLD INSULATION OVER RIG...

Страница 39: ...like other refrigeration equipment reject heat through the condenser It is necessary to know the amount of heat rejected by an ice machine when determining the additional BTUH requirements for air conditioning equipment Self contained air cooled ice machines add the total BTUH load to a conditioned space QuietQube Ice Machine head sections add an insignificant amount of load to a conditioned space...

Страница 40: ...vice Period After Cleaning and Sanitizing Routine adjustments and maintenance procedures outlined in this manual are not covered by the warranty WATER LEVEL Q0600C Q0800C Q1000C QDUAL The water level sensor is set to maintain the proper water level above the water pump housing The water level is not adjustable If the water level is incorrect check the water level probe for damage probe bent etc Cl...

Страница 41: ...1400C 1 8 1 2 in 3 12 5 mm SU1000C 1 8 1 4 in 3 6 35 mm 2 The float valve is factory set for the proper water level If adjustments are necessary A Loosen the two screws on the float valve bracket B Raise or lower the float valve assembly as necessary then tighten the screws If further adjustment is required carefully bend the float arm to achieve the correct water level WATER LEVEL ...

Страница 42: ...f 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 Make sure the ice thickness probe wire and bracket do not restrict movement of the probe SV3113 ADJUSTING SCREW 1 8 IN ICE BRIDGE THICKNESS ICE THICKNESS ADJUSTMENT 1 8 ICE BRIDGE THICKNESS ...

Страница 43: ...energizes and de energizes by time The water purge must be at the factory setting of 45 seconds for the water fill valve to energize during the last 15 seconds of the water purge If it is set to less than 45 seconds the water fill valve will not energize during the water purge Important The Harvest sequence water purge is factory set at 45 seconds A shorter purge setting with standard water suppli...

Страница 44: ...erVend UC 300 dispenser only Refer to the SerVend UC 300 Installation Use and Care Manual for dispenser cleaning sanitizing procedures Caution Use only Manitowoc approved Ice Machine Cleaner part number 94 0546 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 ...

Страница 45: ...ontacted by the water distribution system This technology will also allow initiation and completion of a Clean or Sanitize cycle after which the ice machine automatically starts ice making again Refer to the cleaning or sanitizing procedure for complete details The AuCS Accessory can be set to automatically start and finish a Clean or Sanitize cycle every 2 4 or 12 weeks This accessory monitors ic...

Страница 46: ...lastic part a controlled release of silver ions from the surface is regulated to maintain an effective concentration at or near the surface of the plastic ice machine part AlphaSan s unique ability to effectively control the release of silver not only protects against undesired discoloration of the plastic but also will last the life of the plastic part Although AlphaSan helps prevent biofilm buil...

Страница 47: ...the ice to melt off the evaporator Step 2 To start a cleaning cycle move the toggle switch to the CLEAN position The water will flow through the water dump valve and down the drain The Clean light will turn on to indicate the ice machine is in the cleaning mode Step 3 Wait about one minute or until water starts to flow over the evaporator Step 4 Add the proper amount of Manitowoc Ice Machine Clean...

Страница 48: ...to flow over the evaporator then move the switch from CLEAN to ICE position C When the cleaning cycle is completed the Clean light will turn off and an ice making sequence will start automatically NOTE After the toggle switch is moved to the ICE position opening the curtain bin switch will interrupt the cleaning sequence The sequence will resume from the point of interruption when the curtain bin ...

Страница 49: ...p 2 To start a sanitizing cycle move the toggle switch to the CLEAN position The water will flow through the water dump valve and down the drain The Clean light will turn on to indicate the ice machine is in the cleaning mode Step 3 Wait about one minute or until water starts to flow over the evaporator Step 4 Add the proper amount of Manitowoc Ice Machine Sanitizer to the water trough The Q1400C ...

Страница 50: ... Wait about one minute into the sanitizing cycle until water starts to flow over the evaporator then move the switch from CLEAN to ICE position C When the sanitizing cycle is completed the Clean light will turn off and an ice making sequence will start automatically NOTE After the toggle switch is moved to the ICE position opening the curtain bin switch will interrupt the cleaning sequence The seq...

Страница 51: ...machine control board counts the number of ice Harvest cycles The AuCS Accessory interrupts the ice making mode and starts the cleaning or sanitizing mode when the harvest count equals the Frequency of Cleaning setting of the AuCS When the automatic cleaning or sanitizing cycle is complete approximately 25 minutes ice making resumes automatically and the Harvest Count is reset to zero Caution Refe...

Страница 52: ... Step 4 After the cleaning or sanitizing cycle stops move the toggle switch to ICE position Step 5 A The ice machine may be set to start and finish a cleaning or sanitizing cycle then automatically start ice making again B You must wait about one minute into the cleaning cycle until water starts to flow over the evaporator then move the toggle switch from CLEAN to ICE position C When the cleaning ...

Страница 53: ...sh or sponge NOT a wire brush to carefully clean the parts Warning Disconnect electric power to the ice machine at the electric switch box before proceeding Warning Wear rubber gloves and safety goggles and or face shield when handling Ice Machine Cleaner or Sanitizer Solution Type Water Mixed With Cleaner 1 gal 4 l 16 oz 500 ml cleaner Sanitizer 4 gal 15 l 1 oz 30 ml sanitizer Warning Do not mix ...

Страница 54: ... removed parts NOTE Incomplete rinsing of the ice thickness probe or water level probe may leave a residue This could cause the ice machine to malfunction For best results brush or wipe the probe off while rinsing it Thoroughly dry the probe before installing it 8 Turn on the water and electrical supply 9 Verify the ice thickness probe is properly adjusted Caution Do not immerse the water pump mot...

Страница 55: ... valve 1 If so equipped remove the water dump valve shield from its mounting bracket 2 Lift and slide the coil retainer cap from the top of the coil 3 Note the position of the coil assembly on the valve for assembly later Leaving the wires attached lift the coil assembly off the valve body and the enclosing tube 4 Press down on the plastic nut on the enclosing tube and rotate it 1 4 turn Remove th...

Страница 56: ...e body 6 Remove the tubing from the dump valve by twisting the clamps off Remove the two screws securing the dump valve and the mounting bracket Important The plunger and the inside of the enclosing tube must be completely dry before assembly DUMP VALVE REMOVAL DO NOT DISCONNECT WIRES AT COIL RETAINING CAP WATER DUMP VALVE VALVE SHIELD DUMP VALVE DISASSEMBLY PLUNGER SPRING STOP PLUNGER DIAPHRAGM V...

Страница 57: ...ws securing the pump mounting bracket to the bulkhead 4 Lift the pump and bracket assembly off the screws Warning Disconnect the electric power to the ice machine at the electric service switch box and turn off the water supply SV1618 WATER PUMP POWER CORD LOOSEN SCREWS WATER PUMP REMOVAL Q0600C Q0800C Q1000C SHOWN ...

Страница 58: ...can easily be cleaned If complete removal is desired continue with step 2 below 2 Disconnect the wire lead from the control board inside the electrical control box Warning Disconnect the electric power to the ice machine at the electric service switch box and turn off the water supply SV1619 DISCONNECT WIRE LEAD ICE THICKNESS PROBE REMOVAL COMPRESS HINGE PIN TO REMOVE ...

Страница 59: ...eding to step 2 2 If complete removal is required disconnect the wire lead from the control board 1F inside the electrical control box Warning Disconnect the electrical power to the ice machine at the electrical disconnect before proceeding SV1621 WATER LEVEL PROBE REMOVAL Q0600C Q0800C Q1000C Shown SCREW WATER LEVEL PROBE WATER TROUGH ICE MACHINE SIDE PANEL WIRE LEAD ...

Страница 60: ...ectors until disengaged from ice machine connectors remain attached to splash shield 2 Remove panel from front of ice machine by lifting forward and up Important Splash shield must be reinstalled to prevent water leakage NYLATCH CONNECTORS PULL FORWARD TO DISENGAGE Q1400 Shown ...

Страница 61: ... 51 WATER CURTAIN 1 Gently flex the curtain in the center and remove it from the right side 2 Slide the left pin out SV1213 WATER CURTAIN REMOVAL ...

Страница 62: ...rclockwise one or two turns 3 Pull the float valve forward and off the mounting bracket 4 Disconnect the water inlet tube from the float valve at the compression fitting 5 Remove the filter screen and cap for cleaning SV1217 FLOAT VALVE REMOVAL WATER INLET TUBE COMPRESSION FITTING FILTER SCREEN AND CAP ON OFF SLIDE SWITCH SPLASH SHIELD ...

Страница 63: ...nlet valve must completely stop water flow into the machine Watch for water flow If water flows remove disassemble and clean the valve 3 When the ice machine is on the water inlet valve must allow the proper water flow through it Set the toggle switch to ON Watch for water flow into the ice machine If the water flow is slow or only trickles into the ice machine remove disassemble and clean the val...

Страница 64: ...n place NOTE The water inlet valve can be disassembled and cleaned without disconnecting the incoming water supply line to the ice machine 3 Remove clean and install the filter screen 4 If necessary remove the enclosing tube access screws to clean interior components SV1622 WATER INLET VALVE REMOVAL WATER INLET VALVE FILTER ACCESS SCREWS INCOMING WATER LINE ...

Страница 65: ...e 3 Lift the end of the distribution tube with the hose fitting up and then slide it back and to the right Caution Do not force this removal Be sure the locating tab is clear before sliding the distribution tube back SV1620 WATER DISTRIBUTION TUBE REMOVAL THUMBSCREW DISTRIBUTION TUBE 1 LIFT UP 2 SLIDE BACK 3 SLIDE TO RIGHT THUMB SCREW 1 2 3 ...

Страница 66: ...sassemble for cleaning A Twist both of the inner tube ends until the tabs line up with the keyways B Pull the inner tube ends outward SV1211 WATER DISTRIBUTION TUBE DISASSEMBLY INNER TUBE INNER TUBE KEYWAY TAB ...

Страница 67: ...ve the quarter turn fasteners turn counterclockwise securing the trough in place 3 Lift up and forward on the front of the water trough while allowing the rear of the water trough to drop Remove the water trough from the ice machine SV1771B REMOVE THE TWO QUARTER TURN FASTENERS BY TURNING COUNTERCLOCKWISE WATER TROUGH REMOVAL ...

Страница 68: ...kwise securing the trough in place 2 Pull forward on the water trough until the rear pins disengage from the water trough 3 Lift up and forward on the front of the water trough while allowing the rear of the water trough to drop 4 Remove the water trough from the ice machine Pins Located Behind Water Curtain 1 ...

Страница 69: ...w compressed air in the drain openings in the rear of the ice machine until no more water comes out of the drain 6 Place the toggle switch in the ICE position then wait 45 seconds for the water fill solenoid valve to energize Blow compressed air through the incoming water supply in the rear of the ice machine until no more water comes out of the inlet water line 7 Make sure water is not trapped in...

Страница 70: ...er to open the valve before restarting 2 Perform steps 1 6 under Q1400C Head Section 3 Insert a large screwdriver between the bottom spring coils of the water regulating valve Pry upward to open the valve 4 Hold the valve open and blow compressed air through the condenser until no water remains AuCS ACCESSORY Refer to the AuCS Accessory manual for Winterization of the AuCS Accessory ...

Страница 71: ... ICE MACHINE HEAD SECTION Q0600C Q0800C Q1000C SV1754 WATER INLET VALVE LIQUID LINE SOLENOID VALVE WATER DUMP VALVE DRAIN HOSE LIQUID LINE SHUT OFF VALVE SUCTION LINE SHUT OFF VALVE RECEIVER RECEIVER SERVICE VALVE COOL VAPOR VALVE ...

Страница 72: ... 66 Q0600C Q0800C Q1000C SV1605A FLOW CLAMP USED ON REGULAR SIZE CUBE ONLY DISTRIBUTION TUBE ICE THICKNESS PROBE EVAPORATOR WATER CURTAIN WATER TROUGH WATER PUMP ICE OFF CLEAN SWITCH ...

Страница 73: ... Dispenser Ice Thickness Probe Electrical Compartment Toggle Switch Dump Valve Water Trough Water Curtain Water Pump Float Valve Access Panels Cool Vapor Valve Water Pump Liquid Line Drier Float Valve Liquid Line Solenoid Valve ...

Страница 74: ... ICE THICKNESS PROBE COOL VAPOR VALVE FLOAT VALVE WATER INLET SUCTION LINE SHUT OFF VALVE SV1770RH LIQUID LINE SHUT OFF VALVE COOL VAPOR VALVE WATER DUMP VALVE LIQUID LINE SOLENOID VALVE RECEIVER RECEIVER SERVICE VALVE Receiver Service Valve ...

Страница 75: ... 69 QDUAL DISTRIBUTION TUBE SV1780 EVAPORATOR WATER PUMP WATER CURTAIN WATER TROUGH ...

Страница 76: ... UNIT CVD0675 CVD0875 CVD1075 CVD1475 ACCESS VALVE CONDENSER FAN MOTOR HEAD PRESSURE CONTROL VALVE AIRCONDENSER COMPRESSOR SUCTION ACCUMULATOR LIQUID LINE AND SUCTION LINE CONNECTION POINTS ELECTRICAL COMPARTMENT SV2085 ...

Страница 77: ... 71 CVD1476 LIQUID LINE AND SUCTION LINE CONNECTION POINTS SUCTION ACCUMULATOR COMPRESSOR WATER COOLED CONDENSER HEAD PRESSURE CONTROL VALVE ELECTRICAL COMPARTMENT WATER REGULATING VALVE ...

Страница 78: ...CVD1875 CVD2075 ACCESS VALVES CVD1875 SHOWN CONDENSER FAN MOTOR AIR CONDENSER HEAD PRESSURE CONTROL VALVE COMPRESSOR SUCTION ACCUMULATOR LIQUID LINE AND SUCTION LINE CONNECTION POINTS ELECTRICAL COMPARTMENT ...

Страница 79: ... entire Freeze and Harvest sequences The cool vapor solenoid valve remains on for 5 seconds during initial compressor start up and then shuts off The water fill valve is energized at the same time as the liquid line solenoid valve CVD Condensing Unit When the refrigerant pressure is high enough to close the low pressure control after the cool vapor valve energizes in step 1 the contactor coil is e...

Страница 80: ...n flow of water is directed across the evaporator and into each cube cell where it freezes The water fill valve will cycle on then off one more time to refill the water trough When sufficient ice has formed the water flow not the ice contacts the ice thickness probe After approximately 7 seconds of continual water contact the Harvest sequence is initiated The ice machine cannot initiate a Harvest ...

Страница 81: ...as into the evaporator When the refrigerant pressure is low enough to open the fan cycling pressure control the condenser fan motor stops The Q0600C ice machine does not use a fan cycle control therefore the condenser fan motor will continue to run in the Harvest cycle 6 Harvest The cool vapor solenoid valve remains open and the refrigerant gas warms the evaporator causing the cubes to slide as a ...

Страница 82: ...erant pressure is low enough to open the fan cycling pressure control the condenser fan motor stops When the refrigerant pressure is low enough to open the low pressure control the contactor coil is de energized and the compressor stops The ice machine remains off until enough ice has been removed from the storage bin to allow the ice to fall clear of the water curtain As the water curtain swings ...

Страница 83: ... LPC Contactor Coil Contactor Comp Fan Motor Initial Start Up 1 Water Purge On Off On On Off Closed On Off 45 Seconds 2 Refrigeration System Start Up Off On On Off On Closed On On 5 Seconds Freeze Sequence 3 Prechill Off May Cycle On Off During First 45 Sec Off Off On Closed On On 30 Seconds 4 Freeze On Cycles Off Then On One More Time Locked out After 6 min Off Off On Closed On On Unit 7 Sec Wate...

Страница 84: ...l others May Cycle On Off Bin Switch Activation 7 Automatic Shut Off Off Off Off Off Off Off Off Until Bin Switch Recloses Q600C Q800C Q1000C SU1000C Energized Parts Chart Ice Making Sequence of Operation Control Board Relays Condensing Unit Length of Time 1 Water Pump 2 Water Fill Valve 3 Cool Vapor Valve 4 Water Dump Valve 5 Liquid Line Solenoid LPC Contactor Coil Contactor Comp Fan Motor ...

Страница 85: ...vaporator CVD Condensing Unit When the refrigerant pressure is high enough to close the low pressure switch the contactor coil is energized and the compressor and condenser fan motor CVD1475 only start They are supplied with power throughout the entire Freeze and Harvest sequences The fan motor CVD1475 only is wired through a fan cycle pressure control therefore it may cycle on and off 3 Freeze Th...

Страница 86: ...elay 2 or 3 de energizes the corresponding cool vapor solenoid valve for the remainder of the Harvest sequence The momentary opening and reclosing of both bin switches terminates the Harvest sequence and returns the ice machine to the Freeze sequence steps 2 3 Automatic Shut Off 6 Automatic Shut Off Ice Machine Section When the storage bin is full at the end of a Harvest sequence the sheet of cube...

Страница 87: ...h of Time 1 Water Pump 2 Cool Vapor Valve Right 3 Cool Vapor Valve Left 4 Water Dump Valve 5 Liquid Line Solenoid Valve LPCO Contactor Coil Contactor Condenser Fan Motor Compressor Initial Start Up 1 Water Purge On Off Off On Off Open Off 45 Seconds Freeze Sequence 2 Prechill Off Off Off Off On Closed On 30 Seconds ...

Страница 88: ...conds 5 Harvest Off On On Off On Closed On Bin Switch Activation Energized Parts Chart Model Q1400C Continued Ice Making Sequence of Operation Control Board Relays Condensing Unit Length of Time 1 Water Pump 2 Cool Vapor Valve Right 3 Cool Vapor Valve Left 4 Water Dump Valve 5 Liquid Line Solenoid Valve LPCO Contactor Coil Contactor Condenser Fan Motor Compressor ...

Страница 89: ...atic Shut Off Off Off Off Off Off Open Off Until BOTH Bin Switches Recloses Energized Parts Chart Model Q1400C Continued Ice Making Sequence of Operation Control Board Relays Condensing Unit Length of Time 1 Water Pump 2 Cool Vapor Valve Right 3 Cool Vapor Valve Left 4 Water Dump Valve 5 Liquid Line Solenoid Valve LPCO Contactor Coil Contactor Condenser Fan Motor Compressor ...

Страница 90: ...e energizes after the 45 second water purge and remains on throughout the entire Freeze and Harvest sequences The cool vapor solenoid valves remain on for 5 seconds during initial compressor start up and then shut off The water fill valve is energized at the same time as the liquid line solenoid valve CVD Condensing Unit When the refrigerant pressure is high enough to close the low pressure contro...

Страница 91: ...s after the 30 second prechill An even flow of water is directed across the evaporator and into each cube cell where it freezes The water fill valve will cycle on one more time to refill the water trough as needed When sufficient ice has formed the water flow not the ice contacts the ice thickness probe After approximately 10 seconds of continual water contact the Harvest sequence is initiated The...

Страница 92: ...he beginning of the water purge 6 Harvest The cool vapor valves remain open and the refrigerant warms each evaporator causing the cubes to slide as a sheet off the evaporator and into the storage bin The ice may fall first from either the right or the left evaporator or both at the same time The sliding sheet of cubes swings the water curtain out opening the corresponding bin switch and de energiz...

Страница 93: ...est sequence the sheet of cubes fails to clear either one or both of the water curtains After one or both water curtains are held open for 30 seconds the ice machine shuts off Note Early production control boards checked for bin switch closure within 7 seconds CVD Condensing Unit When the refrigerant pressure is low enough to open the low pressure switch the contactor coil is de energized and the ...

Страница 94: ...f Time 1 Water Pump 2 Water Fill Solenoid 3 Dump Valve 4 Liquid Line Solenoid 5 Cool Vapor Valve 1 6 Cool Vapor Valve 2 LPCO Contactor Coil Contactor Fan Motor and Compressor Initial Start Up 1 Water Purge On Off On Off On On Closed On 45 Seconds 2 Refrigeration System Start Up Off On Off On On On Closed On 5 Seconds ...

Страница 95: ...obe Harvest Sequence 5 Water Purge On 30 Sec Off 15 Sec On On On On On Closed On Water Purge Factory Set at 45 Sec Energized Parts Chart Model QDUAL Continued Ice Making Sequence of Operation Control Board Relays Condensing Unit Length of Time 1 Water Pump 2 Water Fill Solenoid 3 Dump Valve 4 Liquid Line Solenoid 5 Cool Vapor Valve 1 6 Cool Vapor Valve 2 LPCO Contactor Coil Contactor Fan Motor and...

Страница 96: ...n Switch Activation 7 Auto Shut Off Off Off Off Off Off Off Open Off Until Bin Switch Recloses Energized Parts Chart Model QDUAL Continued Ice Making Sequence of Operation Control Board Relays Condensing Unit Length of Time 1 Water Pump 2 Water Fill Solenoid 3 Dump Valve 4 Liquid Line Solenoid 5 Cool Vapor Valve 1 6 Cool Vapor Valve 2 LPCO Contactor Coil Contactor Fan Motor and Compressor ...

Страница 97: ... 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 If water contacts the ice thickness probe during these six minutes the Harvest light will come on to indicate that water is in contact with the probe but the ice machine will stay in the Freeze cycle After the six minutes ...

Страница 98: ...te delay period is overridden when the toggle switch is moved to the OFF position then back to ICE Inputs The control board along with inputs controls all electrical components including the ice machine sequence of operation Prior to diagnosing you must understand how the inputs affect the control board operation Refer to specific component specifications inputs wiring diagrams and ice machine seq...

Страница 99: ...losed the fuse is good 2 Remove the fuse Check the resistance across the fuse with an ohmmeter Warning High line voltage is applied to the control board terminals 55 and 56 at all times Removing the control board fuse or moving the toggle switch to OFF will not remove the power supplied to the control board Warning Disconnect electrical power to the entire ice machine before proceeding Reading Res...

Страница 100: ...ins 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 provide the 3 minute delay has expired Specifications The bin switch is a magnetically operated reed switch The magnet is attached to the lower right corner of the water ...

Страница 101: ...switch light off indicates the bin switch has opened properly Ohm Test 1 Disconnect the bin switch wires to isolate the bin switch from the control board 2 Connect an ohmmeter to the disconnected bin switch wires 3 Cycle the bin switch by opening and closing the water curtain NOTE To prevent misdiagnosis Always use the water curtain magnet to cycle the switch Larger or smaller magnets will affect ...

Страница 102: ...If the ice machine goes into Harvest sequence while the water curtain is removed one of the following will happen Water curtain remains off When the Harvest cycle time reaches 3 5 minutes QDUALC 7 minutes and the bin switch is not closed the ice machine stops as though the bin were full Water curtain is put back on If the bin switch closes prior to reaching the 3 5 minute point the ice machine imm...

Страница 103: ... Isolate the toggle switch by disconnecting all wires from the switch or by disconnecting the Molex connector and removing wire 69 from the toggle switch 3 Check across the toggle switch terminals using a calibrated ohmmeter Note where the wire numbers are connected to the switch terminals or refer to the wiring diagram to take proper readings 4 Replace the toggle switch if ohm readings do not mat...

Страница 104: ...in 3 2 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 in 3 2 mm thick 2 If adjustment is necessary turn the ice thickness probe adjustment screw clockwise to increase bridge thickness or counterclockwise to decrease bridge thickness NOTE Turning the ...

Страница 105: ...lution while disassembling and cleaning water circuit components soak ice thickness probe for 10 minutes or longer 3 Clean all ice thickness probe surfaces including all plastic parts do not use abrasives Verify the ice thickness probe cavity is clean Thoroughly rinse ice thickness probe including cavity with clean water then dry completely Incomplete rinsing and drying of the ice thickness probe ...

Страница 106: ...and any cabinet ground Monitor the Harvest light Harvest Light On The Harvest light comes on and 6 10 seconds later the ice machine cycles from Freeze to Harvest The ice thickness control circuitry is functioning properly Do not change any parts The Harvest light comes on but the ice machine stays in the Freeze sequence The ice thickness control circuitry is functioning properly The ice machine is...

Страница 107: ... 6 10 seconds later the ice machine cycles from Freeze to Harvest The ice thickness probe is causing the malfunction The Harvest light comes on but the ice machine stays in the Freeze sequence The control circuitry is functioning properly The ice machine is in a six minute freeze time lock in verify step 1 of this procedure was followed correctly Harvest Light Off The Harvest light does not come o...

Страница 108: ...witch to OFF and back to ICE Wait until the water starts to flow over the evaporator then monitor the Harvest light The Harvest light stays off and the ice machine remains in the Freeze sequence The ice thickness probe is causing the malfunction Verify that the ice thickness probe is adjusted correctly The Harvest light comes on and 6 10 seconds later the ice machine cycles from Freeze to Harvest ...

Страница 109: ...evel above the water pump housing The water level is not adjustable If the water level is incorrect check the water level probe for damage probe bent etc Repair or replace the probe as necessary WATER INLET VALVE SAFETY SHUT OFF In the event of a water level probe failure this feature limits the water inlet valve to a six minute on time Regardless of the water level probe input the control board a...

Страница 110: ... the water trough After 45 seconds into the Freeze cycle The water inlet valve will cycle on and then off one more time to refill the water trough The water inlet valve is now off for the duration of the Freeze sequence HARVEST CYCLE CIRCUITRY The water level probe does not control the water inlet valve during the Harvest cycle During the Harvest cycle water purge the water inlet valve energizes t...

Страница 111: ...er level probe to any cabinet ground Refer to the chart on the next page Important This restart must be done prior to performing diagnostic procedures This assures the ice machine is not in a Freeze cycle water inlet valve safety shut off mode You must complete the entire diagnostic procedure within 6 minutes of starting Important For the test to work properly you must wait until the Freeze cycle ...

Страница 112: ...lowing into the Water Trough The Water Level Light Is The Water Inlet Valve Solenoid Coil Is Cause No On De energized This is normal operation Do not change any parts Yes On De energized The water inlet valve is causing the problem Yes Off Energized Proceed to step 3 ...

Страница 113: ...restart this test by disconnecting the jumper wire restarting the ice machine step 1 and then reinstalling the jumper wire to terminal 1F after the compressor starts Step 3 Jumper Wire Connected from Control Board Terminal 1F to Ground Is Water Flowing into the Water Trough The Water Level Light Is The Water Inlet Valve Solenoid Coil Is Cause No On De energized The water level probe is causing the...

Страница 114: ...mpressor energizes and then refer to the chart Important This restart must be done prior to performing diagnostic procedures This assures the ice machine is not in a Freeze cycle water inlet valve safety shut off mode You must complete the entire diagnostic procedure within 6 minutes of starting Step 2 Checking for Normal Operation Is Water Flowing into the Water Trough The Water Level Light Is Th...

Страница 115: ...ater level probe restart the ice machine step 1 and then disconnect the water level probe after the compressor starts Step 3 Disconnect Probe from 1F Is Water Flowing into the Water Trough The Water Level Light Is The Water Inlet Valve Solenoid Coil Is Cause Yes Off Energized The water level probe is causing the problem Clean or replace the water level probe No Off Energized The water inlet valve ...

Страница 116: ...ly A defective bin switch can falsely indicate a full bin of ice 4 Verify ICE OFF CLEAN toggle switch functions properly A defective toggle switch may keep the ice machine in the OFF mode 5 Verify low DC voltage is properly grounded Loose DC wire connections may intermittently stop the ice machine 6 Replace the control board Be sure steps 1 5 were followed thoroughly Intermittent problems are not ...

Страница 117: ...ce machine condensing unit and the fuse circuit breaker is closed 2 Verify the high pressure cutout and low pressure cutouts are closed The HPCO and LPCO are closed if primary line voltage is present at the contactor coil terminals 3 Verify line voltage is present at the contactor coil 4 Verify the contactor contacts are closed and line voltage is present across all lines 5 Refer to compressor dia...

Страница 118: ... for the compressor 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 THREE PHASE COMPRESSORS 1 Disconnect power from the condensing...

Страница 119: ...g component and a mechanically seized compressor To determine which you have Install high and low side gauges Try to start the compressor Watch the pressures closely If the 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 AMPS The continuous amperage ...

Страница 120: ...cts that connect and disconnect the start capacitor from the compressor start winding The contacts on the relay are normally closed start capacitor in series with the start winding The relay senses the voltage generated by the start winding and opens the contacts as the compressor motor starts The contacts remain open until the compressor is de energized Relay Operation Check 1 Disconnect wires fr...

Страница 121: ...R LEVEL PROBE BIN SWITCH VIEW FOR WIRING 3 4 2 1 5 62 1C 1F 1G 63 65 66 64 TRANS FUSE 7A LOW D C VOLTAGE PLUG ICE 67 68 69 62 55 56 20 61 60 57 OFF CLEAN INTERNAL WORKING VIEW TOGGLE SWITCH CLEAN LIGHT WATER LEVEL BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE 66 62 68 67 69 21 77 76 98 58 83 22 87 80 81 9 8 97 75 N 75 L2 LIQUID LINE SOLENOID WATER PUMP DUMP VALVE COOL VAPOR VALVE WATER VALVE ...

Страница 122: ...WITCH VIEW FOR WIRING 3 4 2 1 5 62 1C 1F 1G 63 65 66 64 TRANS FUSE 7A LOW D C VOLTAGE PLUG ICE 67 68 69 62 55 56 61 60 57 OFF CLEAN INTERNAL WORKING VIEW TOGGLE SWITCH CLEAN LIGHT WATER LEVEL BIN SWITCH LIGHT HARVEST LIGHT SAFETY LIMIT CODE 66 62 68 67 69 77 76 98 58 83 87 80 81 9 8 97 75 N 75 L2 LIQUID LINE SOLENOID WATER PUMP DUMP VALVE COOL VAPOR VALVE ...

Страница 123: ...C 1F 1G 63 65 62 93 66 67 68 N 69 62 66 62 68 67 69 VIEW FOR WIRING LOW D C VOLTAGE PLUG TRANS FUSE 7A RIGHT CURTAIN LEFT CURTAIN HARVEST LIGHT SAFETY LIMIT CODE ICE OFF CLEAN TOGGLE SWITCH INTERNAL WORKING VIEW WATER PUMP LIQUID LINE SOLENOID DUMP VALVE COOL VAPOR VALVE RIGHT COOL VAPOR VALVE LEFT 61 60 20 57 58 56 91 77 76 98 83 92 81 82 80 97 75 99 ...

Страница 124: ... THICKNESS PROBE WATER LEVEL PROBE 2 1 3 4 5 19 N 75 20 24 22 97 ICE 55 23 58 OFF CLEAN 2 98 60 76 77 1 92 22 81 80 61 62 99 COOL VAPOR VALVE 1 LIQUID LINE SOLENOID DUMP SOLENOID WATER PUMP 82 COOL VAPOR VALVE 2 WATER FILL SOLENOID GROUND 56 57 21 BIN SWITCH 1 BIN SWITCH 2 20 91 6 ...

Страница 125: ...R 95 L2 N 96 74 CONTACTOR CONTACTS HIGH PRESSURE CUTOUT FAN MOTOR LOW PRESSURE SWITCH CONTACTOR COIL CONTACTOR CONTACTS RUN CAPACITOR CVD0675 DOES NOT HAVE A FAN CYCLE CVD1476 DOES NOT HAVE A FAN MOTOR CONTROL FAN CYCLE CONTROL OVERLOAD RELAY COMPRESSOR RUN CAPACITOR START CAPACITOR 85 49 49 47 46 43 48 44 45 R R 1 2 5 S S C CVD1476 CVD2075 DO NOT USE A COMPRESSOR CRANKCASE HEATER ...

Страница 126: ...ND COMPRESSOR CRANKCASE HEATER FAN MOTOR CONTACTOR COIL LOW PRESSURE SWITCH HIGH PRESSURE CUTOUT CONTACTOR COMPRESSOR FAN CYCLE CONTROL RUN CAPACITOR 94 96 T1 T2 T3 85 95 74 L1 L2 L3 CVD675 DOES NOT HAVE A FAN CYCLE CVD1476 DOES NOT HAVE A FAN MOTOR CONTROL CVD1476 CVD2075 DO NOT USE A COMPRESSOR CRANKCASE HEATER ...

Страница 127: ...rol valve will modulate to maintain the correct head pressure and refrigerant temperature Water Cooled Models The head pressure control valve modulates from the bypass position to the non bypass position as the head pressure exceeds its set point The condenser removes heat and the refrigerant condenses to a high pressure liquid The water regulating valve will modulate to maintain the correct head ...

Страница 128: ...nds compressor discharge gas directly to the receiver The discharge gas keeps the recitative warm and the refrigerant pressure up as liquid refrigerant is boiled off the receiver Vapor from the top of the receiver flows through the cool vapor valve and condenses in the evaporator The change of state of the refrigerant from vapor to liquid releases the heat necessary for the harvest cycle The refri...

Страница 129: ... compressor suction port in the freeze cycle The suction accumulator empties within the first 5 minutes of the freeze cycle When the refrigeration affect ends liquid refrigerant has been removed the suction line between the accumulator and compressor will increase in temperature The suction line temperature increases 20 plus degrees two minutes after the liquid has been removed The time needed to ...

Страница 130: ...reases the harvest cycle time and results in a safety limit 2 failure Overcharged ice machines sub cool the liquid refrigerant in the receiver during the freeze cycle resulting in a refrigerant boil off rate in the harvest cycle that is too low This increases the harvest cycle time and results in a safety limit 2 failure When you are replacing refrigeration system components verify refrigerant cha...

Страница 131: ... clean the evaporator before diagnosin the refrigeration system The water curtain must swing freely open and closed and the bin switch must function properly Refer to the checklist below then specifications diagnostics for individual components Harvest Cycle Diagnostic List 1 Suction liquid line shut off valves and receiver service valve are fully open 2 Line set properly sized 3 Suction and liqui...

Страница 132: ... conditions determined in step 1 to find published 24 hour ice 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 Weighing the ice is the only 100 accurate check However if the ice pattern is normal a...

Страница 133: ...anitowoc Distributor for information on available options and accessories Installation Visual Inspection Checklist Possible Problem List Corrective Action List 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 ...

Страница 134: ... 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 Water dump valve leaking during the Freeze cycle Clean replace dump valve as needed Vent tube is not installed on water outlet drain See Installation Instructions Hoses fittings etc are leaking water Repair r...

Страница 135: ...r supply a dump valve leaking water a faulty water fill valve a low refrigerant charge etc Evaporator Tubing Routing Routing of the tubing on the back of the evaporator determines the ice fill pattern failure mode The 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 fir...

Страница 136: ...ch 1 8 in in the proper amount of time this is still considered normal 2 Extremely Thin at Evaporator Outlet There is no ice or a considerable lack of ice formation at the evaporator outlet Examples No ice at all at the evaporator outlet but ice forms on the rest of the evaporator Or the ice at the evaporator outlet reaches 1 8 in to initiate a harvest but the rest of the evaporator already has 1 ...

Страница 137: ...r 5 No Ice Formation The ice machine operates for an extended period but there is no ice formation at all on the evaporator Possible cause Water fill float valve water pump starving expansion valve low refrigerant charge compressor etc Important Q1400C QDUALC ice machines have left and right expansion valves and separate evaporator circuits These circuits operate independently from each other Ther...

Страница 138: ...y the control boards Current production control boards have an orange label on the microprocessor with the number 302 The earlier version does not have the orange label Safety Limit 1 If the freeze time reaches 60 minutes the control board automatically initiates a harvest cycle Control Board with orange label and 302 on microprocessor If six consecutive 60 minute freeze cycles occur the ice machi...

Страница 139: ...me a safety limit shut down occurs three consecutive long freeze or harvest cycles the ice machine will turn off for 60 minutes Stand By Mode During the Stand By Mode the harvest light will be flashing continuously and a safety limit indication can be viewed After 60 minutes the ice machine will automatically restart to see if the problem re occurs If the same safety limit is reached a second time...

Страница 140: ...ich safety limit stopped the ice machine After safety limit indication the ice machine will restart and run until a safety limit is exceeded again Control Board with Orange Label and 302 on Microprocessor When a safety limit condition is exceeded for 3 consecutive cycles the control board enters the limit to memory and the ice machine continues to run Use the following procedure to determine if th...

Страница 141: ...Y LIMIT NOTES Because there are many possible external problems do not limit your diagnosis to only the items listed in these charts 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 moved to the OFF position and then back to the ICE position prior to reaching the...

Страница 142: ...System Ice thickness probe out of adjustment Harvest cycle not initiated electrically Contactor not energizing Compressor electrically non operational High inlet air temperature 130 F 54 4 C max Condenser discharge air recirculation Defective fan cycling control Defective fan motor Restricted condenser air flow Refrigeration System Non Manitowoc components Improper refrigerant charge Defective hea...

Страница 143: ...Loss of water from sump area Clogged water distribution tube Dirty defective water fill valve Dirty defective float valve Defective water pump Electrical System Ice thickness probe out of adjustment Ice thickness probe dirty Bin switch defective Premature harvest Refrigeration System Non Manitowoc components Improper refrigerant charge Defective head pressure control valve Defective cool vapor val...

Страница 144: ... ______ Harvest Cycle ______ 3 Perform an actual discharge pressure check 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 within the published pressure range for the ice machine s operating conditions It is normal for the discharge pressure to be higher at the beginning of the Freeze cycle w...

Страница 145: ...ing control CVD0675 CVD1476 does not use a fan cycle control Defective fan motor Improper Refrigerant Charge Overcharged Non condensable in system Wrong type of refrigerant Other Non Manitowoc components in system High side refrigerant lines component Restricted before mid condenser Defective head pressure control valve Water Inlet Valve is incorrectly adjusted CVD1476 only NOTE Do not limit your ...

Страница 146: ...VD1476 only NOTE Do not limit your diagnosis to only 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 pressur...

Страница 147: ...sig In the example the proper suction pressure should be approximately 38 psig at 6 minutes 34 psig at 8 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 Manifold gauges were connected to the example ice machine and suction pressure readings taken as follows psig Beginning of Freeze cycle 59 at...

Страница 148: ...nd is affecting suction pressure refer to Freeze Cycle Discharge Pressure High Checklist Improper Refrigerant Charge Overcharged Wrong type of refrigerant Non condensable in system Other Non Manitowoc components in system Cool vapor valve leaking TXV flooding check bulb mounting Defective compressor NOTE Do not limit your diagnosis to only the items listed in the checklists ...

Страница 149: ...e Low Checklist Improper Refrigerant Charge Undercharged Wrong type of refrigerant Other Non Manitowoc components in system Improper water supply over evaporator refer to Water System Checklist 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 diagno...

Страница 150: ...ting 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 cool vapor valve is energized open allowing refrigerant gas from the top of the receiver to flow into the evaporator The refrigerant changes state from a vapor to a liquid and gives up latent heat This heat is absorbed by the evaporator an...

Страница 151: ...e cycle Symptoms of a cool vapor valve remaining partially open during the Freeze cycle can be similar to symptoms of an expansion valve float 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 normal As the amount of leakage increases the length of the Freeze cy...

Страница 152: ...atures 1 Use a quality temperature meter capable of taking temperature readings on curved copper lines 2 Attach the temperature meter s thermocouple to the copper suction line within 6 in of the suction shut off valve 3 Monitor the suction line temperature during the last three minutes of the Freeze cycle and record the low event 4 Use this with other information gathered on the Refrigeration Comp...

Страница 153: ... 149 THIS PAGE INTENTIONALLY LEFT BLANK ...

Страница 154: ...s on the table enter a check mark Example Freeze cycle suction pressure is determined to be low Enter a check mark in the low box Perform the procedures and check 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...

Страница 155: ... machine model serial plate amount Column 3 TXV Flooding Overcharge A loose or improperly mounted expansion valve bulb causes the expansion valve to flood Check bulb mounting insulation etc before changing the valve On dual expansion valve machines the service technician should be able to tell which TXV is flooding by analyzing ice formation patterns Change only the flooding expansion valve Weigh ...

Страница 156: ...within 10 of charted 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 evaporator outlet or No ice formation on top of evaporator Ice formation is extremely thin on evaporator outlet or No ice formation on entire evaporator Ice formation normal or Ice formation i...

Страница 157: ...e problem checklist 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 ...

Страница 158: ... valve is greater than 10 F 12 2 C at the end of the Freeze cycle Suction line temperature at the suction shut off valve is greater than 10 F 12 2 C at the end of the Freeze cycle Suction line temperature at the suction shut off valve is less than 10 F 12 2 C at the end of the Freeze cycle Suction line temperature at the suction shut off valve is greater than 10 F 12 2 C at the end of the Freeze c...

Страница 159: ...related problems must be corrected before proceeding with chart Ice Formation Pattern Left _______________ Right ______________ Ice formation is extremely thin on outlet of one evaporator or No ice formation on top of one evaporator Ice formation is normal or Ice formation is extremely thin on outlet of one or both evaporators or No ice formation on one or both evaporators Ice formation is normal ...

Страница 160: ...charge pressure problem checklist 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...

Страница 161: ...n line temperature at the suction shut off valve is greater than 10 F 12 2 C at the end of the Freeze cycle Suction line temperature at the suction shut off valve is greater than 10 F 12 2 C at the end of the Freeze cycle Suction line temperature at the suction shut off valve is less than 10 F 12 2 C at the end of the Freeze cycle Suction line temperature at the suction shut off valve is greater t...

Страница 162: ...e first 6 minutes of the freeze cycle At ambient temperatures of approximately 70 F 21 1 C or above refrigerant flows through the valve from the condenser to the receiver inlet At temperatures below this or at higher temperatures if it is raining the head pressure control starts to modulate closes the condenser port and opens the bypass port from the compressor discharge line In this modulating mo...

Страница 163: ...enser All CVD Models The warm discharge gas adds heat to the receiver in the harvest cycle Without this additional heat the head pressure would continue to drop as liquid refrigerant boils off in the receiver Example A service technician removes refrigerant vapor from a cylinder by boiling off the liquid refrigerant A refrigeration effect is created as the refrigerant changes state from a liquid t...

Страница 164: ...id line temperature and head pressure 3 Determine the temperature of the liquid line entering the receiver by feeling it This line is normally warm body temperature 4 Using the information gathered refer to the list for diagnosis NOTE A headmaster that will not bypass will function properly with condenser air temperatures of approximately 70 F 21 1 C or above When the temperature drops below 70 F ...

Страница 165: ... receiver feels warm to hot Ice machine low on charge Refer to Low on Charge Verification Fan cycling control cycles condenser fan motor liquid line entering receiver feels warm to hot Ice machine low on charge Refer to Low on Charge Verification CVD0675 Valve not maintaining pressures Non approved valve Install a Manitowoc head pressure control valve with proper setting Discharge pressure extreme...

Страница 166: ... but fails at temperatures below 32 F Harvest cycle suction pressure is low Harvest cycle discharge pressure is normal or slightly low Procedure 1 Freeze cycle operation must be normal before diagnosing the headmaster in the harvest cycle Refer to Cycle Times 24 hr Ice Production Refrigerant Pressure Chart 2 Allow the ice machine to run a normal freeze cycle do not initiate an early harvest cycle ...

Страница 167: ...ine receiver feel the same for the first 30 seconds of the harvest cycle The headmaster is functioning correctly The compressor discharge line is noticeably warmer than the liquid line to the ice machine receiver Headmaster valve is not bypassing 100 Replace headmaster valve Refrigerant Flow No F lo w Step 3 Details Grasp Here with Hands to Compare Temperatures LIQUID LINE FROM CONDENSER ...

Страница 168: ...o the ice machine receiver in the harvest cycle All refrigerant flow through the condenser in the harvest cycle stops Symptoms of a headmaster valve that will not seat 100 closed in the harvest cycle completely bypass the condenser are Freeze cycle suction and discharge pressure are normal The control board indicates safety limit 2 Harvest cycle suction pressure is low Harvest cycle discharge pres...

Страница 169: ...fy water regulating valve is set and or operating correctly Headmaster valve is stuck in bypass Discharge pressure low Liquid line entering receiver feels warm to hot Ice Machine low on charge Refer to Low on Charge Verification Harvest Cycle Discharge pressure normal or high Liquid line entering receiver feels warm suction pressure is low Headmaster valve not bypassing Refer to Harvest Cycle Head...

Страница 170: ...l board memory Harvest cycle suction pressure is low When refrigerant charge is suspected verify by recovering the refrigerant weighing and comparing to the nameplate amount Refer to Refrigerant Recovery Evacuation for recovery procedures Undercharge Symptoms Safety limit 2 in control board memory Harvest cycle suction pressure is low Harvest cycle discharge pressure is low Liquid line entering re...

Страница 171: ...ge pressure is normal Freeze cycle time suction and discharge pressure are normal and the ice machine will not harvest The sheet of ice cubes show little or no sign of melting when removed from the evaporator after the harvest cycle has been completed If the cubes are melted you have a release problem clean the ice machine ...

Страница 172: ...etermine 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 valve to 240 psig clean or replace valve Discharge pressure extremely high Liquid line entering recei...

Страница 173: ...ressure CHECK PROCEDURE 1 Verify fan motor windings are not open or grounded and fan spins freely 2 Connect manifold gauges to ice machine 3 Hook voltmeter in parallel across the fan cycle control leaving wires attached 4 Refer to chart below Specifications Model Cut In Close Cut Out Open CVD0875 CVD1075 CVD1475 CVD1875 250 psig 5 200 psig 5 CVD2075 250 psig 5 275 psig 5 200 psig 5 225 psig 5 FCC ...

Страница 174: ...ect condensing unit 6 Set ICE OFF CLEAN switch to ICE block condensing unit with cardboard or similar object 7 No 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 Replace the HPCO control if it 1 Will not reset below 300 psig 2 Does not open at the specified cut out point Specifications Cut ...

Страница 175: ... line solenoid valve will de energize and the suction pressure will begin to decrease The low pressure control will open at the listed specification 4 Use the manifold gauge set to increase suction pressure Feed refrigerant from the high side access valve to the low side access valve Add refrigerant in small increments to allow the low side pressure to be monitored The low pressure control will cl...

Страница 176: ...VALVE LLSV SUCTION SHUT OFF VALVE HEAT EXCHANGER CHECK VALVE HEAD PRESSURE CONTROL VALVE ACCUMULATOR TXV COOL VAPOR VALVE COMPRESSOR EVAPORATOR LIQUID LINE SHUT OFF VALVE CONDENSER S TRAP REQUIRED 21 OR GREATER RISE DRIER SUCTION LINE FILTER Ice Machine Head Section Condensing Unit ...

Страница 177: ...EVAPORATOR HEAT EXCHANGER CONDENSER SUCTION FILTER CHECK VALVE RECEIVER DRIER HEAD PRESSURE CONTROL VALVE ACCUMULATOR COOL VAPOR VALVE SUCTION SHUT OFF VALVE EVAPORATOR TXV COOL VAPOR VALVE CVD1476 ONLY Condenser Water Outlet S Trap Required 21 or Greater Rise RECEIVER SERVICE VALVE Condensing Unit ...

Страница 178: ...emperatures will seldom match the chart exactly Zero out manifold gauge set before obtaining pressure readings to avoid misdiagnosis All pressure readings are taken at the ice machine head section Connect Manifold gauge set at the suction and liquid line shut off valves to obtain pressure readings Pressures taken at the condensing unit will vary with line set length ambient exposed line set etc an...

Страница 179: ... 1Times in minutes Air Temp Entering Condenser F C Water Temperature F C 50 10 0 70 21 1 90 32 2 20 to 70 29 to 21 1 635 575 540 80 26 7 625 570 530 90 32 2 585 525 490 100 37 8 530 475 440 1Based on average ice slab weight of 4 12 4 75 lb 2Regular cube derate is 7 Air Temp Entering Condenser F C Freeze Cycle Harvest Cycle Discharge Pressure psig Suction Pressure psig Discharge Pressure psig Sucti...

Страница 180: ... 15 2 1Times in minutes Air Temp Entering Condenser F C Water Temperature F C 50 10 0 70 21 1 90 32 2 20 to 70 29 to 21 1 760 690 640 80 26 7 750 680 640 90 32 2 700 650 610 100 37 8 650 600 560 1Based on average ice slab weight of 5 75 6 50 lb 2Regular cube derate is 7 Air Temp Entering Condenser F C Freeze Cycle Harvest Cycle Discharge Pressure psig Suction Pressure psig Discharge Pressure psig ...

Страница 181: ... 0 15 0 1Times in minutes Air Temp Entering Condenser F C Water Temperature F C 50 10 0 70 21 1 90 32 2 20 to 70 29 to 21 1 980 910 840 80 26 7 960 900 820 90 32 2 920 860 780 100 37 8 850 790 720 1Based on average ice slab weight of 7 75 8 25 lb 2Regular cube derate is 7 Air Temp Entering Condenser F C Freeze Cycle Harvest Cycle Discharge Pressure psig Suction Pressure psig Discharge Pressure psi...

Страница 182: ...11 6 12 5 12 6 13 5 14 0 15 0 1Times in minutes Air Temp Entering Condenser F C Water Temperature F C 50 10 0 70 21 1 90 32 2 20 to 70 29 to 21 1 980 910 840 80 26 7 960 900 820 90 32 2 920 860 780 100 37 8 850 790 720 1Based on average ice slab weight of 7 75 8 25 lb Air Temp Entering Condenser F C Freeze Cycle Harvest Cycle Discharge Pressure psig Suction Pressure psig Discharge Pressure psig Su...

Страница 183: ...s in minutes Air Temp Entering Condenser F C Water Temperature F C 50 10 0 70 21 1 90 32 2 20 to 70 29 to 21 1 1375 1225 1085 90 32 2 1350 1200 1060 100 37 8 1260 1110 980 110 43 3 1150 1000 970 1Based on average ice weight of one Harvest cycle 12 00 13 50 lb 6 00 6 75 lb per evaporator Air Temp Entering Condenser F C Freeze Cycle Harvest Cycle Discharge Pressure psig Suction Pressure psig Dischar...

Страница 184: ... F C Water Temperature F C 50 10 0 70 21 1 90 32 2 35 to 70 1 6 to 21 1 1420 1245 1070 80 26 7 1400 1230 1065 90 32 2 1395 1225 1060 100 37 8 1390 1220 1055 1 Based on average ice weight of one Harvest cycle 12 00 14 00 lb 6 00 7 00 lb per evaporator Air Temp Entering Condenser F C Freeze Cycle Harvest Cycle Discharge Pressure psig Suction Pressure psig Discharge Pressure psig Suction Pressure psi...

Страница 185: ... minutes Air Temp Entering Condenser F C Water Temperature F C 50 10 0 70 21 1 90 32 2 20 to 70 29 to 21 1 1820 1670 1560 80 26 7 1650 1530 1420 90 32 2 1530 1410 1300 100 37 8 1360 1260 1180 1Based on average ice weight of one Harvest cycle 15 50 16 50 lb 2 Regular cube derate is 7 Air Temp Entering Condenser F C Freeze Cycle Harvest Cycle Discharge Pressure psig Suction Pressure psig Discharge P...

Страница 186: ... 12 9 12 9 13 8 110 43 3 12 0 12 9 12 5 13 4 13 9 14 9 1 Times in minutes Air Temp Entering Condenser F C Water Temperature F C 50 10 0 70 21 1 90 32 2 20 to 70 29 to 21 1 2000 1800 1700 80 26 7 1930 1750 1650 90 32 2 1810 1650 1550 100 37 8 1650 1590 1450 1 Based on average ice weight of one Harvest cycle 15 50 16 50 lb 2 Regular cube derate is 7 Air Temp Entering Condenser F C Freeze Cycle Harve...

Страница 187: ...onsibility for the use of contaminated refrigerant Damage resulting from the use of contaminated refrigerant is the sole responsibility of the servicing company Important Replace the liquid line drier before evacuating and recharging Use only a Manitowoc OEM liquid line filter drier to prevent voiding the warranty Warning Recovery evacuation of a QuietQube remote system requires connections at thr...

Страница 188: ...erate the recovery unit as directed by the manufacturer s instructions B Evacuation prior to recharging Evacuate to 250 microns Then allow the pump to run for an additional hour Turn off the pump and perform a standing vacuum leak check 6 Refer to Charging Procedures Warning The receiver service valve located in the ice machine head section must be accessed during refrigerant recovery to allow com...

Страница 189: ... on condenser as it connects directly into compressor Compressor damage can result 5 Ensure all refrigerant in the charging hoses is drawn into the low side of the system then disconnect the manifold gauges 6 Run the ice machine in the Freeze cycle 7 Close the receiver service valve in the ice machine head section 8 Disconnect the manifold gauge set from the liquid line shut off valve 9 Open the h...

Страница 190: ...inating the need to take an oil sample Follow the manufacturer s directions If a refrigerant test kit indicates harmful levels of contamination or if a test kit is not available inspect the compressor oil 1 Remove the refrigerant charge from the ice machine 2 Remove the compressor from the system 3 Check the odor and appearance of the oil 4 Inspect open suction and discharge lines at the compresso...

Страница 191: ...t 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 Severe contamination cleanup procedure Severe Compressor Burnout symptoms Oil is discolored acidic and smells acrid ...

Страница 192: ...ll 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 250 microns Run the vacuum pump for 1 2 hour on self contained models 1 hour on remotes NOTE You may perform a pressure...

Страница 193: ...r valve TXV and head pressure control valve 4 Wipe away any burnout deposits from suction and discharge lines at compressor 5 Sweep through the open system with dry nitrogen 6 Install a new compressor and new start components 7 Replace existing suction line filter drier in front of accumulator 8 Install a new liquid line drier Important Refrigerant sweeps are not recommended as they release CFCs i...

Страница 194: ...nal 10 Charge the system with the proper refrigerant to the nameplate charge 11 Operate the ice machine for one hour Then check the pressure drop across the suction line filter drier A If the pressure drop 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...

Страница 195: ...l Position the pinch off 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 3 Cut the tubing of the defective component with a small tubing cutter 4 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 tub...

Страница 196: ... 194 NOTE The pressure controls will operate normally once the tubing is re rounded Tubing may not re round 100 SV1406 FIG A PINCHING OFF TUBING FIG B RE ROUNDING TUBING USING PINCH OFF TOOL ...

Страница 197: ...chines have a back flushing action that takes place during every Harvest cycle A Manitowoc filter drier has a very high moisture removal capability and a good acid removal capacity Listed below is the recommended OEM field replacement drier Liquid Line Driers Model Drier Size End Connection Size Part Number Q0600C Q0800C Q1000C SU1000C UK 082S 1 4 in 89 3024 3 Q1400C UK 083S 3 8 in 89 3027 3 QDUAL...

Страница 198: ...t charge has escaped and the refrigeration system has been exposed to the atmosphere 3 A compressor is replaced 4 Refrigeration system contains contaminants Listed below is the recommended OEM field replacement filter Suction Line Filter Model Drier Size End Connection Size Part Number CVD0675 CVD0875 ASF35S5 5 8 in 82 5030 3 CVD1075 CVD1475 CVD1476 ASF45S6 3 4 in 82 5026 3 CVD1875 CVD2075 ASF45S7...

Страница 199: ...rmation is for reference only Refer to the ice machine serial number tag to verify the system charge Serial plate information overrides information listed on this page Model Condensing Unit Refrigerant Charge lbs oz Line Set Length Q0600C CVD675 11 lbs 76 oz 0 100 ft Q0800C CVD875 12 lbs 192 oz 0 100 ft 11 lbs 176 oz 0 100 ft Q1000C CVD1075 12 lbs 192 oz 0 100 ft SU1000C SerVend UC300 Dispenser Q1...

Страница 200: ...AL22A Refrigeration systems exposed to atmosphere for more than 5 minutes must have the compressor oil changed The compressor must be removed and at least 95 of the oil must be removed through the suction port of the compressor Measure the oil as it is removed and replace with the same amount of new oil ...

Страница 201: ...rigerant 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 definition Regardless of t...

Страница 202: ...ycled refrigerant from other products is not approved Recycling equipment must be certified to ARI Standard 740 latest edition and be maintained to consistently meet this standard Recovered refrigerant must come from a contaminant free system To decide whether the system is contaminant free consider Type s of previous failure s Whether the system was cleaned evacuated and recharged properly follow...

Страница 203: ......

Страница 204: ...MANITOWOC ICE 2110 South 26th Street P O Box 1720 Manitowoc WI 54221 1720 USA Phone 920 682 0161 Fax 920 683 7585 Website www manitowocice com 2003 Manitowoc Ice Litho in U S A ...

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