Manitowoc Q Model QuietQube® Ice Machines Technician’s Handbook This manual is updated as new information and models are released. Visit our website for the latest manual. www.manitowocice.
Safety Notices As you work on Manitowoc equipment, be sure to pay close attention to the safety notices in this handbook. Disregarding the notices may lead to serious injury and/or damage to the equipment. Throughout this handbook, you will see the following types of safety 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.
NOTE: Text set off as a Note provides you with simple, but useful, extra information about the procedure you are performing. Read These Before Proceeding: ! Caution Proper installation, care and maintenance are essential for maximum performance and troublefree operation of your Manitowoc equipment. If you encounter problems not covered by this handbook, do not proceed, contact Manitowoc Foodservice Group. We will be happy to provide assistance.
Table of Contents Model Numbers Model/Serial Number Location .............................. 2 Ice Machine Warranty Information Owner Warranty Registration Card ....................... 3 Warranty Coverage ............................................... 4 General............................................................. 4 Parts ................................................................. 4 Labor ................................................................ 4 Exclusions .............................
Electrical Requirements....................................... 13 QuietQube® Ice Machines and CVD® Condensing Units ................................ 13 3 Phase Scroll Compressor Rotation.............. 13 Refrigeration System Installation......................... 15 Usage With Non-Manitowoc Condensing Units ........................................... 15 Factory Equipment Refrigerant Amounts........ 16 Refrigeration Line Set Installation...................
Component Identification Ice Machine Head Section .................................. 65 Q0600C/Q0800C/Q1000C ............................. 65 SU1000C/SerVend UC-300 Dispenser .......... 67 Q1400C .......................................................... 68 QDUAL ........................................................... 69 CVD® Condensing Unit ....................................... 70 CVD0675/CVD0875/CVD1075/CVD1475 ...... 70 CVD1476 ........................................................
Electrical System Component Specifications and Diagnostics Control Board ................................................................... 91 Harvest/Safety Limit Light............................... 91 Freeze Time Lock-In Feature ......................... 91 Maximum Freeze Time ................................... 91 Safety Limits ................................................... 91 Three-Minute Delay ........................................ 92 Inputs ....................................................
Refrigeration System Refrigeration System Diagnostics ..................... 123 General......................................................... 123 Refrigeration System Operation ................... 123 Ice Machine will Not Harvest Diagnostics ......... 127 Harvest Cycle Diagnostic List....................... 127 Ice Production Check ........................................ 128 Installation/Visual Inspection Checklist......... 129 Water System Checklist ...............................
Cycle Times/24-Hour Ice Production/Refrigerant Pressure Charts Q0600C/CVD675 Series Remote Air Cooled .... 177 Q0800C/CVD875 Series Remote Air Cooled .... 178 Q1000C/CVD1075 Series Remote Air Cooled .. 179 SU1000C/SerVend UC-300 Dispenser/CVD1075 Remote Air Cooled ............................................ 180 Q1400C/CVD1475 Series Remote Air Cooled .. 181 Q1400C/CVD1476 Remote water Cooled......... 182 QDUAL/CVD1875 Remote Air Cooled .............. 183 QDUAL/CVD2075 Remote air Cooled...............
Model Numbers This manual covers the following models: CVD® Condensing Unit* Ice Machine Head Section QR0670C QD0672C QY0674C QR0870C QD0872C QY0874C QR1070C QD1072C QY1074C SU1024YC/SerVend UC-300 Dispenser QR1470C QD1472C QY1474C QRDUALC QDDUALC QYDUALC CVD0675 CVD0875 CVD1075 CVD1285 CVD1075 CVD1375 CVD1475 CVD1476 CVD1875 CVD2075 *For 3 phase electrical option: add the number “3” to end of model number (CVD10753).
! 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 deflector is compatible with Manitowoc ice machines.
Ice Machine Warranty Information OWNER WARRANTY REGISTRATION CARD Warranty coverage begins the day the ice machine is installed. Important Complete and mail the OWNER WARRANTY REGISTRATION CARD as soon as possible to validate the installation date. 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.
WARRANTY COVERAGE General The following Warranty outline is provided for your convenience. For a detailed explanation, read the warranty bond shipped with each product. Contact your local Manitowoc representative or Manitowoc Ice, Inc. if you need further warranty information. Important This product is intended exclusively for commercial application. No warranty is extended for personal, family, or household purposes. Parts 1.
3. Damage caused by improper installation of the ice machine, electrical supply, water supply or drainage, or damage caused by floods, storms, or other acts of God. 4. Premium labor rates due to holidays, overtime, etc.; travel time; flat rate service call charges; mileage and miscellaneous tools and material charges not listed on the payment schedule. Additional labor charges resulting from the inaccessibility of equipment are also excluded. 5.
Installation LOCATION OF ICE MACHINE The location selected for the ice machine head section must meet the following criteria. If any of these criteria are not met, select another location. The location must be free of airborne and other contaminants. The air temperature must be at least 35°F (1.6°C), but must not exceed 110°F (43.4°C). The location must not be near heat-generating equipment or in direct sunlight.
STACKING TWO ICE MACHINES ON A SINGLE STORAGE BIN Q0600C/Q0800C/Q1000C Ice Machines: A stacking kit is required for stacking two ice machines. Installation instructions are supplied with the stacking kit. Q1400C/QDUAL Ice Machines: Q1400C and QDUAL ice machines cannot be stacked. However two Q1400C/QDUAL ice machines can be placed 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.
LOCATION OF CVD® CONDENSING UNIT The location selected for the CVD® Condensing Unit must meet the following criteria. If any of these criteria are not met, select another location. The air temperature must be at least -20°F (-28.9°C), but must not exceed 130°F (54.4°C) -20°F (-28.9°C) to 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).
ICE MACHINE HEAD SECTION WATER SUPPLY AND DRAINS Potable Water Supply Local water conditions may require treatment of the water to inhibit scale formation, filter sediment, and remove chlorine odor and taste. Important If you are installing a Manitowoc water filter system, refer to the Installation Instructions supplied with the filter system for ice making water inlet connections.
Drain Connections Follow these guidelines when installing drain lines to prevent drain water from flowing back into the ice machine and storage bin: Drain lines must have a 1.5 in. drop per 5 ft. of run (2.5 cm per meter), and must not create traps. The floor drain must be large 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.
WATER COOLED CONDENSER WATER SUPPLY AND DRAINS Condenser Water Supply Local water conditions may require treatment of the water to inhibit scale formation to filter sediment. Water Cooled Condenser Lines Follow these guidelines to install water lines: Contact your distributor if your water pressure is greater than 150 psi (1034kPA). A special order condensing unit is available that allows water pressure up to 350 psi (2413 kPA).
Condensing Unit Drain Connections The condensing unit drain is provided to remove any condensate produced by the suction 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.
ELECTRICAL REQUIREMENTS QuietQube® Ice Machines and CVD® Condensing Units Ice Machine Head Section Voltage Max. Fuse/ Circuit Phase Breaker Cycle Q0600C Q0800C Q1000C SU1000C Q1400C QDUAL 115/1/60 230/1/50 15 amp 15 amp Total Amps 1.1 0.6 Important The QuietQube® Ice Machine Head Section and CVD® Condensing Unit are wired independently from each other.
CVD0675 CVD0875 CVD1075 CVD1475 CVD1476 CVD1875 CVD2075 CVD® Condensing Unit Voltage Max. Fuse/ Phase Circuit Cycle Breaker 208-230/1/60 15 amp 208-230/3/60 15 amp 230/1/50 15 amp 208-230/1/60 20 amp 208-230/3/60 15 amp 230/1/50 20 amp 208-230/1/60 25 amp 208-230/3/60 20 amp 230/1/50 25 amp 208-230/1/60 35 amp 208-230/3/60 25 amp 230/1/50 35 amp 208-230/1/60 30 amp 208-230/3/60 20 amp 40 amp 208-230/1/60 30 amp 208-230/3/60 40 amp 230/1/50 50 amp 208-230/1/60 40 amp 208-230/3/60 50 amp 230/1/50 Min.
REFRIGERATION SYSTEM INSTALLATION QuietQube® 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 QDUAL CVD1875 CVD2075 Line Set Suction Line Liquid Line RC 20/30/50 3/4 in. (19.1 mm) 1/2in. (12.7 mm) RC 21/31/51 5/8 in. (15.9 mm) 3/8 in. (9.5 mm) RC 22/32/52 7/8 in. (22.2 mm) 5/8 in. (15.
Factory Equipment Refrigerant Amounts ICE MACHINE HEAD SECTION Q0600C/Q0800C/Q1000C/SU1000C/Q1400C Each ice machine head section ships from the factory with an R-404A refrigerant charge appropriate for the entire system operation. The serial tag on the ice machine indicates the refrigerant charge. The refrigerant charge is sufficient to operate the ice machine in ambient temperatures between -20°F (-28.9°C) and 130°F (54.4°C), (CVD1476, 50°F to 110°F, 10°C to 43°C) with line set lengths of up to 100 ft.
! Warning Potential Personal Injury Situation The ice machine head section contains the refrigerant charge. Installation and brazing of the line sets must be performed by a properly trained refrigeration technician aware of the dangers of dealing with refrigerant charged equipment. Refrigeration Line Set Installation Refrigeration line set installation consists of vertical and horizontal line set distances between the ice machine and the condensing unit.
B. LINE SET RISE OR DROP 35 FT. (10.7 M) MAXIMUM DISTANCE SV1751 35 ft. (10.7 m) Rise: The maximum distance the CVD® Condensing Unit can be above the ice machine. 15 FT. (4.5 M) MAXIMUM DISTANCE SV1750 15 ft. (4.5 m) Drop: The maximum distance the CVD® Condensing Unit can be below the ice machine.
C. SUCTION LINE OIL TRAPS ! Caution Do not form unwanted traps in refrigeration lines. Never coil excess refrigeration tubing. 0 to 20 ft. (0 to 6.1 m) Rise: The ice machine head section has one oil trap built in which allows for a maximum condenser rise of 20 ft. (6.1 m) without additional traps in the suction line. 21 to 35 ft. (6.4 to 10.7 m) Rise: The suction line requires an additional oil trap (“S” type) to be installed.
Model Q0600C Q0800C Q1000C SU1000C Q1400C Manitowoc S-Trap Kit S-Trap Kit # Tubing Size 5/8 in. K00172 (15.9 mm) QDUAL K00166 3/4 in. (19.1 mm) K00164 7/8 in. (22.2 mm) SV1760 SERVICE LOOP A service loop in the line set permits easy access to the ice machine for cleaning and service. The supplied service loop is an installation requirement. Excess tubing must allow 180 degree rotation of the ice machine. A service loop is not considered an oil trap.
Step 3. When the line set requires shortening or lengthening, do so before connecting the line set to the ice machine head section or the CVD® Condensing Unit. ! Caution Do not form unwanted traps in refrigeration lines. Never coil excess refrigeration tubing. Step 4. To prevent oxidation of the copper, purge line set and condensing unit with dry nitrogen while brazing. . ! Warning The ice machine head section contains refrigerant charge.
CONNECT THE LINE SET TO THE CVD® CONDENSING UNIT ! Warning The condensing unit ships from the factory pressurized with a 50/50 mixture of nitrogen/helium. Bleed off pressure from both suction and liquid line access ports prior to cutting into refrigeration lines. The compressor oil rapidly absorbs moisture. Be prepared to complete line set installation and start your evacuation process in order to minimize the time the compressor is exposed to the atmosphere.
Liquid Line SV3077 Suction Line Step 5. Schrader valve core removal tools that allow for removal and installation of the valve cores without removing manifold gauge set hoses are recommended to decrease the evacuation time. Leave the line set shut-off valves closed (front seated). Pressure test the line sets and CVD® Condensing Unit with 150 psig of dry nitrogen. Add nitrogen at the line set shut-off valves located at the back of the ice machine.
ALTERNATE CONNECTIONS AT CONDENSING UNIT SCHRADER VALVES PT1284 If required, the line set and condensing unit can be evacuated from the schrader valves located in the CVD® Condensing Unit. Schrader 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.
Step 6. The suction line, liquid line and receiver service valves are closed during shipment and installation. Open the valves prior to starting the ice machine. A. Slowly backseat (open – turn counterclockwise) the suction line 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.
Important All refrigeration valve caps must be reinstalled to prevent future refrigeration leaks. TURN COUNTERCLOCKWISE TO OPEN. RECEIVER SERVICE VALVE CAP (TURN COUNTERCLOCKWISE TO REMOVE.) SV1756 RECEIVER SERVICE VALVE Verify O-rings in schrader valve caps are intact and reinstall on shut-off valves to prevent refrigerant leakage. Replace shut-off valve access caps and torque to the following specifications. Torque Values Stem 18-20 ft. lbs. Caps 12-15 ft. lbs. Schraeder Core 1.5-3 in. lbs.
pressures to equalize. Place the ICE/OFF/CLEAN toggle switch in the OFF position. Connect power to the CVD® Condensing Unit and allow system to pump down. Step 8. To prevent condensation, the entire suction line including the shut-off valve must be insulated. All insulation must be airtight and sealed at both ends. The following insulation requirements prevent condensation at 90°F (32.2°C) ambient 90% Relative Humidity. If higher humidity is expected, increase insulation thickness.
SUCTION SHUT-OFF VALVE INSULATION The preformed suction shut-off valve insulation is located in the plastic bag taped to the water curtain. PREFORMED INSULATION TIGHTEN VALVE CAPS TO SPECIFICATIONS. A. Verify valve and schrader caps are tightened to specifications (see step 6). PLACE TAB BETWEEN VALVE BODY AND PANEL. B. Place insulation over schrader valve cap and left side of valve. Position the tab between the mounting bracket and rear panel.
3 PHASE SCROLL COMPRESSOR ROTATION CVD2075 ONLY A trained and qualified technician must verify compressor rotation at equipment startup or compressor warranty will be void. Incorrect rotation of a scroll compressor can 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.
Operational Checks GENERAL Your Manitowoc ice machine was factory-operated and adjusted before shipment. Normally, a newly installed ice machine does not require any adjustment. To ensure proper operation, always perform these Operational Checks when starting the ice machine: For the First Time After a Prolonged Out-of-Service Period After Cleaning and Sanitizing Routine adjustments and maintenance procedures outlined in this manual are not covered by the warranty.
Q1400C/SU1000C 1. Check the water level while the ice machine is in the Clean mode and the water pump is running. The correct water level above the water pump impeller housing is: Q1400C - 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.
ICE THICKNESS CHECK After a Harvest cycle, inspect the ice cubes in the ice storage bin. The ice thickness probe is set to maintain an ice bridge of 1/8 in. (3.2 mm). If an adjustment is needed, follow the steps below. 1. Turn the ice thickness probe adjustment screw clockwise for a thicker ice bridge, or counterclockwise for a thinner ice bridge. ADJUSTING SCREW 1/8 IN. ICE BRIDGE THICKNESS 1/8” ICE BRIDGE THICKNESS SV3113 ICE THICKNESS ADJUSTMENT 2.
HARVEST SEQUENCE WATER PURGE Q0600C/Q0800C/Q1000C/SU1000C/QDUAL The Harvest sequence water purge adjustment may only be used when the ice machine is hooked up to special water systems, such as a de-ionized water treatment system. Important The Harvest sequence water purge is factory-set at 45 seconds. A shorter purge setting (with standard water supplies such as city water) is not recommended. This can increase water system cleaning and sanitizing requirements.
Interior Cleaning and Sanitizing NOTE: Clean and sanitize the ice machine every six months for efficient operation. If the ice machine requires more frequent cleaning and sanitizing, consult a water care professional to test the water quality and recommend appropriate water treatment or installation of the AuCS® (Automatic Cleaning System) Accessory. If required, an extremely dirty ice machine may be taken apart for cleaning and sanitizing.
Manitowoc’s Patented Cleaning or Sanitizing Technology Manitowoc ice machines include technology that allows the initiation and completion of a cleaning or sanitizing cycle at the flip of a switch. This cycle will permit cleaning or sanitizing of all surfaces that come in contact with the water distribution system. Periodic maintenance must be performed that includes sanitizing the bin (or dispenser) and adjacent surface areas, which cannot be contacted by the water distribution system.
ALPHASAN The goal of AlphaSan is to keep the plastic surfaces of an ice machine cleaner, by reducing or delaying the formation of biofilm. The active ingredient in AlphaSan is the element silver in the form of silver ions (Ag+). AlphaSan slowly releases silver ions via an ion exchange mechanism.
CLEANING PROCEDURE Ice machine cleaner is used to remove lime scale or other mineral deposits. It is not used to remove algae or slime. Refer to “Sanitizing Procedure” on page 39 for removal of algae and slime. To initiate a cleaning cycle using Manitowoc’s Patented Cleaning Technology, use the following procedure. Step 1. Set the toggle switch to the OFF position after ice falls from the evaporator at the end of a Harvest cycle.
Step 5. The ice machine will automatically time out a ten-minute cleaning cycle, followed by six Rinse cycles, and then stop. The Clean light* will turn off to indicate the cleaning mode is completed. This entire cycle lasts approximately 25 minutes. NOTE: Periodic cleaning must be performed on adjacent surface areas not contacted by the water distribution system. Step 6. When the cleaning process stops, move the toggle switch to the OFF position. Refer to “Sanitizing Procedure” on page 39. Step 7.** A.
SANITIZING PROCEDURE Use sanitizer to remove algae or slime. Do not use it to remove lime scale or other mineral deposits. To initiate a sanitizing cycle using Manitowoc’s Patented Cleaning/Sanitizing Technology, use the following procedure. Step 1. Set the toggle switch to the OFF position after ice falls from the evaporator at the end of a Harvest cycle. Or, set the switch to the OFF position and allow the ice to melt off the evaporator. ! Caution Never use anything to force ice from the evaporator.
Step 5. The ice machine will automatically time out a ten-minute sanitizing cycle, followed by six Rinse cycles, and then stop. The Clean light* will turn off to indicate the sanitizing mode is completed. This entire cycle lasts approximately 25 minutes. NOTE: Periodic cleaning must be performed on adjacent surface areas not contacted by the water distribution system. If the bin requires sanitizing, remove all of the ice and sanitize it with a solution of 1 oz. (30 ml) of sanitizer with up to 4 gal.
Automatic Cleaning System (AuCS®) Accessory This accessory monitors ice-making cycles and initiates cleaning (or sanitizing) procedures automatically. The AuCS® Accessory can be set to automatically clean or sanitize the ice machine every 2, 4, or 12 weeks. Periodic maintenance must be performed that includes cleaning or sanitizing the bin (or dispenser) and adjacent surface areas, which can not be contacted by the water distribution system.
MANUAL START OPERATION Step 1. Set the toggle switch to the OFF position after ice falls from the evaporator at the end of a Harvest cycle. Or, set the switch to the OFF position and allow the ice to melt off the evaporator. ! Caution Never use anything to force ice from the evaporator. Damage may result. Step 2. To start the automatic cleaning system, move the toggle switch to the CLEAN position. The water will flow through the water dump valve and down the drain.
Removal of Parts for Cleaning or Sanitizing 1. Turn off the water supply to the ice machine at the water service valve. ! Warning Disconnect electric power to the ice machine at the electric switch box before proceeding. 2. Remove the water curtain and the components you want to clean or sanitize. See the following pages for removal procedures for these parts. ! Warning Wear rubber gloves and safety goggles (and/or face shield) when handling Ice Machine Cleaner or Sanitizer. 3.
! Caution Do not immerse the water pump motor in the cleaning or sanitizing solution. 5. Use the solution and a brush to clean the top, sides, and bottom evaporator extrusions; the inside of the ice machine panels; and the entire inside of the bin. 6. Thoroughly rinse all of the parts and surfaces with clean water. 7. Install the 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.
WATER DUMP VALVE The water dump valve normally does not require removal for cleaning. To determine if removal is necessary: 1. Locate the water dump valve. 2. Set the toggle switch to ICE. 3. While the ice machine is in the Freeze mode, check the dump valve’s clear plastic outlet drain hose for leakage. A. If the dump valve is leaking, remove, disassemble and clean it. B. If the dump valve is not leaking, do not remove it. Instead, follow standard ice machine cleaning procedures.
RETAINING CAP DO NOT DISCONNECT WIRES AT COIL. VALVE SHIELD WATER DUMP VALVE DUMP VALVE REMOVAL Important The plunger and the inside of the enclosing tube must be completely dry before assembly. NOTE: During cleaning, do not stretch, damage or remove the spring from the plunger. If it is removed, slide the spring’s flared end into the plunger’s slotted top opening until the spring contacts the plunger spring stop. 5. Remove the valve body. 6.
WATER PUMP ! Warning Disconnect the electric power to the ice machine at the electric service switch box and turn off the water supply. 1. Disconnect the water pump power cord. LOOSEN SCREWS. POWER CORD WATER PUMP SV1618 WATER PUMP REMOVAL (Q0600C/Q0800C/Q1000C SHOWN) 2. Disconnect the hose from the pump outlet. 3. Loosen the screws securing the pump, mounting bracket to the bulkhead. 4. Lift the pump and bracket assembly off the screws.
ICE THICKNESS PROBE 1. Compress the side of the ice thickness probe near the top hinge pin and remove it from the bracket. DISCONNECT WIRE LEAD. COMPRESS HINGE PIN TO REMOVE. SV1619 ICE THICKNESS PROBE REMOVAL NOTE: At this point, the ice thickness probe can easily be cleaned. If complete removal is desired, continue with step 2 below. ! Warning Disconnect the electric power to the ice machine at the electric service switch box and turn off the water supply. 2.
WATER LEVEL PROBE Q0600C/Q0800C/Q1000C/QDUAL 1. Loosen the screw that holds the water level probe in place. The probe can easily be cleaned at this point without proceeding to step 2. ! Warning Disconnect the electrical power to the ice machine at the electrical disconnect before proceeding. 2. If complete removal is required, disconnect the wire lead from the control board (1F) inside the electrical control box.
SPLASH SHIELD Q1400C/QDUAL 1. Pull forward on left and right Nylatch connectors until disengaged from ice machine (connectors remain attached to splash shield). 2. Remove panel from front of ice machine by lifting forward and up. NYLATCH CONNECTORS PULL FORWARD TO DISENGAGE. Q1400 Shown Important Splash shield must be reinstalled to prevent water leakage.
WATER CURTAIN 1. Gently flex the curtain in the center and remove it from the right side. SV1213 WATER CURTAIN REMOVAL 2. Slide the left pin out.
FLOAT VALVE SU1000C/Q1400C 1. Turn off the water supply to the ice machine at the water service valve. 2. Turn the splash shield counterclockwise one or two turns. WATER INLET TUBE COMPRESSION FITTING ON/OFF SLIDE SWITCH FILTER SCREEN AND CAP SPLASH SHIELD SV1217 FLOAT VALVE REMOVAL 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.
WATER INLET VALVE Q0600C/Q0800C/Q1000C/QDUAL The water inlet valve normally does not require removal for cleaning. Follow the instructions below to determine if removal is necessary. 1. Set the ICE/OFF/CLEAN switch to OFF. Locate the water inlet (in the water area of the ice machine). It directs water into the water trough. 2. When the ice machine is off, the water inlet valve must completely stop water flow into the machine. Watch for water flow. If water flows, remove, disassemble and clean the valve. 3.
Follow the procedure below to remove the water inlet valve. 1. Remove the valve shield if necessary. 2. Remove the filter access screws that hold the valve in 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.
WATER DISTRIBUTION TUBE 1. Disconnect the water hose from the distribution tube. 3 1. LIFT UP. 2. SLIDE BACK. 3. SLIDE TO RIGHT. 2 1 THUMBSCREW DISTRIBUTION TUBE SV1620 THUMBSCREW WATER DISTRIBUTION TUBE REMOVAL 2. Loosen the thumbscrews, which secure the distribution tube. 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.
4. Disassemble for cleaning. A. Twist both of the inner tube ends until the tabs line up with the keyways. INNER TUBE INNER TUBE TAB KEYWAY WATER DISTRIBUTION TUBE DISASSEMBLY B. Pull the inner tube ends outward.
WATER TROUGH REMOVAL Q1400C/QDUAL 1. Remove the front splash shield, water pump and float valve from the ice machine. 2. Remove 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. REMOVE THE TWO QUARTER TURN FASTENERS BY TURNING COUNTERCLOCKWISE.
WATER TROUGH REMOVAL SU1000C (SerVend UC-300 Dispenser) 1. Remove the quarter turn fasteners (turn counterclockwise) 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.
Removal from Service/Winterization GENERAL Special precautions must be taken if the ice machine is to be removed from service for an extended period of time or exposed to ambient temperatures of 32°F (0°C) or below. ! Caution If water is allowed to remain in the ice machine in freezing temperatures, severe damage to some components could result. Damage of this nature is not covered by the warranty. 1. Place the ice machine toggle switch in the OFF position. 2. Turn off the water supply. 3.
CVD1476 WATER COOLED CONDENSING UNIT Place the ice machine toggle switch into the OFF position. 1. "Front seat" (shut off) the receiver service valve. Hang a tag on the switch as a reminder 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.
Component Identification ICE MACHINE HEAD SECTION Q0600C/Q0800C/Q1000C COOL VAPOR VALVE LIQUID LINE SOLENOID VALVE WATER INLET VALVE RECEIVER SERVICE VALVE SUCTION LINE SHUT-OFF VALVE RECEIVER WATER DUMP VALVE LIQUID LINE SHUT-OFF VALVE DRAIN HOSE –65– SV1754
Q0600C/Q0800C/Q1000C DISTRIBUTION TUBE ICE THICKNESS PROBE WATER TROUGH FLOW CLAMP USED ON REGULAR SIZE CUBE ONLY EVAPORATOR WATER PUMP WATER CURTAIN ICE/OFF/CLEAN SWITCH SV1605A –66–
SU1000C/SerVend UC-300 Dispenser Electrical Compartment & Toggle Switch Ice Thickness Probe Dump Valve Water Curtain Water Trough Liquid Line Drier Cool Vapor Valve Liquid Line Solenoid Valve Water Pump Float Valve Water Pump/Float Valve Access Panels –67–
Q1400C Receiver Service Valve ICE THICKNESS PROBE ICE/OFF/CLEAN SWITCH COOL VAPOR VALVE FLOAT VALVE WATER INLET SV1770LH SUCTION LINE SHUT-OFF VALVE LIQUID LINE SHUT-OFF VALVE COOL VAPOR VALVE RECEIVER SERVICE VALVE WATER DUMP VALVE RECEIVER LIQUID LINE SOLENOID VALVE SV1770RH –68–
QDUAL EVAPORATOR WATER PUMP WATER CURTAIN WATER TROUGH –69– DISTRIBUTION TUBE SV1780
CVD® CONDENSING UNIT CVD0675/CVD0875/CVD1075/CVD1475 CONDENSER FAN MOTOR HEAD PRESSURE CONTROL VALVE ACCESS VALVE ELECTRICAL COMPARTMENT LIQUID LINE AND SUCTION LINE CONNECTION POINTS AIR CONDENSER SV2085 COMPRESSOR SUCTION ACCUMULATOR –70–
CVD1476 LIQUID LINE AND SUCTION LINE CONNECTION POINTS WATER REGULATING VALVE HEAD PRESSURE CONTROL VALVE ELECTRICAL COMPARTMENT WATER COOLED CONDENSER SUCTION ACCUMULATOR COMPRESSOR –71–
CVD1875/CVD2075 ACCESS VALVES AIR CONDENSER CONDENSER FAN MOTOR ELECTRICAL COMPARTMENT HEAD PRESSURE CONTROL VALVE LIQUID LINE AND SUCTION LINE CONNECTION POINTS SUCTION ACCUMULATOR CVD1875 SHOWN –72– COMPRESSOR
Ice Making Sequence of Operation Q0600C/Q0800C/Q1000C/SU1000C Initial Start-Up or Start-Up After Automatic Shut-Off 1. Water Purge Before the compressor starts, the water pump and water dump solenoid are energized for 45 seconds to purge the ice machine of old water. This ensures that the ice-making cycle starts with fresh water.
Freeze Sequence 3. Prechill The compressor is on for 30 seconds prior to water flow to prechill the evaporator. The water fill valve remains on until the water level probe is satisfied. 4. Freeze The water pump restarts 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, then off one more time to refill the water trough.
Harvest Sequence 5. Water Purge The water pump continues to run, and the water dump valve energizes for 45 seconds to purge the water in the sump trough. The water fill valve energizes for the last 15 seconds of the 45-second water purge. After the 45-second water purge, the water fill valve, water pump and dump valve de-energize. (Refer to “Water Purge Adjustment” for details.) The cool vapor solenoid valve also opens at the beginning of the water purge to divert refrigerant gas into the evaporator.
Automatic Shut-Off 7. Automatic Shut-Off Ice Machine Section: When the storage bin is full at the end of a Harvest sequence, the sheet of ice cubes fails to clear the water curtain and will hold it open. After the water curtain is held open for 7 seconds, the ice machine shuts off. The ice machine remains off for 3 minutes before it can automatically restart. CVD® Condensing Unit: The liquid line solenoid valve closes, allowing the refrigeration system to pump down.
Q600C/Q800C/Q1000C/SU1000C Energized Parts Chart Ice Making Sequence of Operation Control Board Relays Condensing Unit LPC Contactor Coil Contactor Comp Fan Motor* Length of Time Off Closed On Off 45 Seconds Off On Closed On On 5 Seconds Off Off On Closed On On 30 Seconds Off Off On Closed On On Unit 7 Sec. Water Contact w/Ice Thickness Probe 1 Water Pump 2 Water Fill Valve 3 Cool Vapor Valve 4 Water Dump Valve 5 Liquid Line Solenoid 1. Water Purge On Off On On 2.
Q600C/Q800C/Q1000C/SU1000C Energized Parts Chart Ice Making Sequence of Operation Control Board Relays 1 Water Pump Harvest Sequence 5. Water Purge On 2 Water Fill Valve 30 Sec. Off, 15 Sec. On 3 Cool Vapor Valve 4 Water Dump Valve Condensing Unit 5 Liquid Line Solenoid LPC Contactor Coil Contactor Comp Fan Motor* Length of Time CVD675 On On On Closed On On All others May Cycle Factory Set at 45 Seconds –78– On/Off CVD675 6.
Q1400C Initial Start-Up or Start-Up After Automatic Shut-Off 1. Water Purge Before the refrigeration system starts, the water pump and water dump solenoid are energized for 45 seconds, to purge the ice machine of old water. This feature ensures that the ice making cycle starts with fresh water. Freeze Sequence 2. Prechill Ice Machine Section: The liquid line solenoid valve energizes after the 45-second water purge and remains on for the entire ice making Freeze and Harvest sequences.
Harvest Sequence 4. Water Purge The water pump continues to run, and the water dump valve energizes for 45 seconds to purge the water in the sump trough. After the 45-second water purge, the water pump and dump valve de-energizes. Both cool vapor solenoid valves also open at the beginning of the water purge to divert refrigerant gas into the evaporator. 5.
Energized Parts Chart – Model Q1400C Control Board Relays Ice Making Sequence of Operation Condensing Unit 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 Length of Time On Off Off On Off Open Off 45 Seconds Off Off Off Off On Closed **On 30 Seconds Initial Start-Up –81– 1. Water Purge Freeze Sequence 2.
Energized Parts Chart – Model Q1400C (Continued) Control Board Relays Ice Making Sequence of Operation Condensing Unit 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 Length of Time On Off Off Off On Closed **On Unit 7 Sec. Water Contact w/Ice Thickness Probe 4. Water Purge On On On On On Closed **On Factory Set at 45 Seconds 5.
Energized Parts Chart – Model Q1400C (Continued) Control Board Relays Ice Making Sequence of Operation 6. Automatic Shut-Off Condensing Unit 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 Length of Time Off Off Off Off Off Open Off Until BOTH Bin Switches Recloses –83– *Low Pressure Control (close on pressure increase).
QDUAL Initial Start-Up or Start-Up After Automatic Shut-Off 1. Water Purge Before the refrigeration system starts, the water pump and water dump solenoid are energized for 45 seconds, to purge the ice machine of old water. This feature ensures that the ice-making cycle starts with fresh water. The cool vapor solenoid valves are also energized during the water purge, although they stay on for an additional 5 seconds (50 seconds total on time) then shut off. 2.
Freeze Sequence 3. Prechill The liquid line solenoid is energized for 30 seconds prior to water flow. This allows the refrigeration system to start up and prechill the evaporator. The water fill valve remains energized until the water level sensor is satisfied. 4. Freeze The water pump restarts 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.
Harvest Sequence 5. Water Purge The water pump continues to run, and the water dump valve energizes for 45 seconds to purge the water in the sump trough. The water fill valve energizes for the last 15 seconds of the 45-second water purge. After the 45-second water purge, the water fill valve, water pump, and dump solenoid valve de-energize. The cool vapor solenoids open at the beginning of the water purge. 6.
6A. Water Assist Harvest Feature Typical duration of a Harvest sequence is less than 2.5 minutes. When the Harvest sequence time reaches 4 minutes, the following occurs: 4 minutes into a Harvest sequence: The water fill valve will energize to fill the trough with water. 5 minutes into a Harvest sequence: The water pump will energize and flow water over the evaporators.
Energized Parts Chart – Model QDUAL Control Board Relays Ice Making Sequence of Operation Condensing Unit 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 Length of Time 1. Water Purge On Off On Off On On Closed On 45 Seconds 2.
Energized Parts Chart – Model QDUAL (Continued) Control Board Relays Ice Making Sequence of Operation 1 Water Pump 2 Water Fill Solenoid Off Until Water is Sensed Condensing Unit 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 Length of Time Off On Off Off Closed **On 30 Seconds Freeze Sequence On 3. Prechill –89– Cycles 4. Freeze On Off Then On Off On Off Off Closed **On Until 10 Sec.
Energized Parts Chart – Model QDUAL (Continued) Control Board Relays Ice Making Sequence of Operation Condensing Unit 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 Length of Time 6. Harvest Off Off Off On On On Closed **On Bin Switch Activation 7.
Electrical System COMPONENT SPECIFICATIONS AND DIAGNOSTICS CONTROL BOARD All QuietQube® control boards incorporate the following features. Refer to “Sequence of Operation” for additional information specific to your model. Harvest/Safety Limit Light This light’s primary function is to be on as water contacts the ice thickness probe during the Freeze cycle, and remain on throughout the entire Harvest cycle. The light will flicker as water splashes on the probes.
Three-Minute Delay The three-minute delay is initiated whenever the ice machine cycles off (automatic shut-off) on a full bin. The delay period starts when a water curtain is open for 7 continuous seconds in the Harvest cycle. If the 3-minute delay period has expired, closure of the water curtain will initiate an immediate start-up of a Freeze sequence.
MAIN FUSE Function The control board fuse stops ice machine operation if electrical components fail, causing high amp draw. Specifications The main fuse is 250 Volt, 7 amp. ! 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. Check Procedure 1. If the bin switch light is on with the water curtain closed, the fuse is good.
BIN SWITCH Function Movement of the water curtain controls bin switch operation. The bin switch has two main functions: 1. Terminating the Harvest cycle and returning the ice machine to the Freeze cycle. This occurs when the bin switch is opened and closed again within 7 seconds during the Harvest cycle. 2. Automatic ice machine shut-off. If the storage bin is full at the end of a Harvest cycle, the sheet of cubes fails to clear the water curtain and holds it open.
Check Procedure 1. Set the toggle switch to OFF. 2. Watch the bin switch light on the control board. 3. Move the water curtain toward the evaporator. The bin switch must close. The bin switch light “on” indicates the bin switch has closed properly. 4. Move the water curtain away from the evaporator. The bin switch must open. The bin 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.
Water Curtain Removal Notes The water curtain must be on (bin switch closed) to start ice making. While a Freeze cycle is in progress, the water curtain can be removed and installed at any time without interfering with the electrical control sequence. 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.
ICE/OFF/CLEAN TOGGLE SWITCH Function The switch is used to place the ice machine in ICE, OFF or CLEAN mode of operation. Specifications Double-pole, double-throw switch. The switch is connected into a varying low D.C. voltage circuit. Check Procedure NOTE: Because of a wide variation in D.C. voltage, it is not recommended that a voltmeter be used to check toggle switch operation. 1. Inspect the toggle switch for correct wiring. 2.
ICE THICKNESS PROBE (HARVEST INITIATION) How the Probe Works Manitowoc’s electronic sensing circuit does not rely on refrigerant pressure, evaporator temperature, water levels or timers to produce consistent ice formation. As ice forms on the evaporator, water (not ice) contacts the ice thickness probe. After the water completes this circuit across the probe continuously for 6-10 seconds, a Harvest cycle is initiated.
Ice Thickness Probe Diagnostics Before diagnosing ice thickness control circuitry clean the ice thickness probe using the following procedure. 1. Mix a solution of Manitowoc ice machine cleaner and water (2 ounces of cleaner to 16 ounces of water) in a container. 2. Soak ice thickness probe in container of cleaner/ water solution while disassembling and cleaning water circuit components (soak ice thickness probe for 10 minutes or longer). 3.
Diagnosing Ice Thickness Control Circuitry ICE MACHINE DOES NOT CYCLE INTO HARVEST WHEN WATER CONTACTS THE ICE THICKNESS CONTROL PROBE Step 1. Bypass the freeze time lock-in feature by moving the ICE/OFF/CLEAN switch to OFF and back to ICE. Wait until the water starts to flow over the evaporator. Step 2. Clip the jumper wire leads to the ice thickness probe and any cabinet ground. Monitor the Harvest light.
Step 3. Disconnect the ice thickness probe from the control board at terminal 1C. Clip the jumper wire leads to terminal 1C on the control board 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 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.
ICE MACHINE CYCLES INTO HARVEST BEFORE WATER CONTACT WITH THE ICE THICKNESS PROBE Step 1. Disconnect the ice thickness probe from the control board at terminal 1C. Step 2. Bypass the freeze time lock-in feature by moving the ICE/OFF/CLEAN switch 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.
WATER LEVEL CONTROL CIRCUITRY Q0600C/Q0800C/Q1000C/QDUAL Only The water level probe circuit can be monitored by watching the water level light. The water level light is on when water contacts the probe, and off when no water is in contact with the probe. The water level light functions any time power is applied to the ice machine, regardless of toggle switch position.
FREEZE CYCLE CIRCUITRY Manitowoc’s electronic sensing circuit does not rely on float switches or timers to maintain consistent water level control. During the Freeze cycle, the water inlet valve energizes (turns on) and de-energizes (turns off) in conjunction with the water level probe located in the water trough. During the first 45 seconds of the Freeze cycle: The water inlet valve is on when there is no water in contact with the water level probe.
DIAGNOSING WATER LEVEL CONTROL CIRCUITRY Q0600C/Q0800C/Q1000C/QDUAL Only Problem: Water Trough Overfilling During the Freeze Cycle Step 1. Start a new Freeze sequence by moving the ICE/OFF/CLEAN toggle switch to OFF and then back to ICE. 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 shutoff mode. You must complete the entire diagnostic procedure within 6 minutes of starting. Step 2.
Step 2. Jumper Wire Connected from Probe to Ground Is Water The Flowing Water into the Level Water Light Is: Trough? The Water Inlet Valve Solenoid Coil Is: No On De-energized Yes On De-energized Yes Off Energized –108– Cause This is normal operation. Do not change any parts. The water inlet valve is causing the problem. Proceed to step 3.
Step 3. Allow ice machine to run. Disconnect the water level probe from control board terminal 1F, and connect a jumper wire from terminal 1F to any cabinet ground. Remember, if you are past 6 minutes from starting, the ice machine will go into a Freeze cycle water inlet valve safety shut-off mode, and you will be unable to complete this test.
Problem: Water Will Not Run into the Sump Trough During the Freeze Cycle Q0600C/Q0800C/Q1000C/QDUAL Only Step 1. Verify water is supplied to the ice machine, and then start a new Freeze sequence by moving the ICE/OFF/CLEAN toggle switch to OFF, then back to ICE. 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 shutoff mode.
Step 3. Leave the ice machine run, and then disconnect the water level probe from control board terminal 1F. Important For the test to work properly you must wait until the Freeze cycle starts, prior to disconnecting the water level probe. If you restart the test, you must reconnect the water level probe, restart the ice machine (step 1), and then disconnect the water level probe after the compressor starts. Step 3.
DIAGNOSING AN ICE MACHINE HEAD SECTION THAT WILL NOT RUN ! Warning High (line) voltage is applied to the control board at all times. Removing control board fuse or moving the toggle switch to OFF will not remove the power supplied to the control board. If the water pump is energized but no ice is produced, refer to “Diagnosing a Condensing Unit that Will Not Run.” 1. Verify primary voltage is supplied to ice machine head section and the fuse/circuit breaker is closed. 2.
DIAGNOSING A CONDENSING UNIT THAT WILL NOT RUN If the ice machine water pump is not energized, refer to “Diagnosing an Ice Machine Head Section that Will Not Run.” 1. Verify primary voltage is supplied to ice 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.
COMPRESSOR ELECTRICAL DIAGNOSTICS The compressor does not start or will trip repeatedly on overload. Check Resistance (Ohm) Values NOTE: Compressor windings can have very low ohm values. Use a properly calibrated meter. Perform the resistance test after the compressor cools. The compressor dome should be cool enough to touch (below 120°F/49°C) to assure that the overload is closed and the resistance readings will be accurate. SINGLE PHASE COMPRESSORS 1.
CHECK MOTOR WINDINGS TO GROUND Check continuity between all three terminals and the compressor shell or copper refrigeration line. Scrape metal surface to get good contact. If continuity is present, the compressor windings are grounded and the compressor should be replaced. To determine if the compressor is seized, check the amp draw while the compressor is trying to start. COMPRESSOR DRAWING LOCKED ROTOR The two likely causes of this are a defective starting component and a mechanically seized compressor.
DIAGNOSING START COMPONENTS If the compressor attempts to start, or hums and trips the overload protector, check the start components before replacing the compressor. CAPACITOR Visual evidence of capacitor failure can include a bulged terminal end or a ruptured membrane. Do not assume a capacitor is good if no visual evidence is present. A good test is to install a known good substitute capacitor. Use a capacitor tester when checking a suspect capacitor.
L1 –117– (64) BIN SWITCH WATER LEVEL PROBE (66) (62) (63) (65) ICE THICKNESS PROBE GROUND (67) 1F LOW D.C. 1G VOLTAGE PLUG 1C FUSE (7A) TRANS.
L1 –118– (64) BIN SWITCH WATER LEVEL PROBE (66) (62) (63) (65) ICE THICKNESS PROBE GROUND (67) 1F LOW D.C. 1G VOLTAGE PLUG 1C FUSE (7A) TRANS.
GROUND –119– (N) (66) BIN SWITCH (RIGHT) (63) BIN SWITCH (LEFT) RESISTOR ICE THICKNESS PROBE L1 (93) (65) (62) TRANS. (67) 1F LOW D.C.
L1 N –120– WATER LEVEL PROBE (20) (58) (56) (75) (97) (19) (55) ICE THICKNESS PROBE GROUND (24) CLEAN OFF ICE (23) (20) (57) (22) 2 1 3 4 5 6 DUMP SOLENOID (21) (76) WATER FILL SOLENOID BIN SWITCH 2 BIN SWITCH 1 (1) (91) (80) (81) (2) COOL VAPOR VALVE 1 COOL VAPOR VALVE 2 LIQUID LINE SOLENOID (77) (61) (62) (60) (99) (98) WATER PUMP (82) (22) (92) QDUALC 115V/60Hz/1Ph or 230V/50Hz/1Ph (Diagram Shown in Freeze Cycle)
L1 –121– *CVD0675 DOES NOT HAVE A FAN CYCLE *CVD1476 DOES NOT HAVE A FAN MOTOR CONTROL (43) R C COMPRESSOR CRANKCASE HEATER (49) 5 2 RELAY 1 RUN CAPACITOR FAN MOTOR (49) S (45) START CAPACITOR (44) (74) CONTACTOR CONTACTS CONTACTOR COIL RUN CAPACITOR R (46) LOW PRESSURE SWITCH *CVD1476 & CVD2075 DO NOT USE A COMPRESSOR CRANKCASE HEATER (47) (48) S COMPRESSOR FAN CYCLE CONTROL (85) HIGH PRESSURE CUTOUT (94) *OVERLOAD CONTACTOR CONTACTS (96) GROUND (95) L2 (N Condensing Un
L1 T2 –122– T1 T3 L2 (94) CONTACTOR HIGH PRESSURE CUTOUT (85) COMPRESSOR (96) L3 COMPRESSOR CRANKCASE HEATER FAN CYCLE CONTROL *CVD675 DOES NOT HAVE A FAN CYCLE *CVD1476 DOES NOT HAVE A FAN MOTOR CONTROL LOW PRESSURE SWITCH CONTACTOR COIL RUN CAPACITOR FAN MOTOR *CVD1476 & CVD2075 DO NOT USE A COMPRESSOR CRANKCASE HEATER GROUND (74) (95) CVD0675/CVD0875/CVD1075/CVD1475/CVD1476/ CVD1875/CVD2075 208-230V/60Hz/3Ph (Diagram Shown in Freeze Cycle)
Refrigeration System REFRIGERATION SYSTEM DIAGNOSTICS General Verify the water and electrical systems are functioning properly before diagnosing the refrigeration system or it’s components. A dirty evaporator increases the length of the harvest cycle and will cause the ice machine to shut off on safety limit #2. All Manitowoc Ice Machines must have their evaporator(s) cleaned first, if a safety limit #2 is in memory.
vapor refrigerant leaves the evaporator and passes through the heat exchanger absorbing additional heat from the liquid line. The suction vapor returns to the condensing unit, passes through the suction accumulator and enters the compressor. HARVEST CYCLE The head pressure control valve bypasses the condenser and sends 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.
SUCTION ACCUMULATOR OPERATION Liquid refrigerant collects in the suction accumulator during the harvest cycle and is removed during the freeze cycle. The liquid refrigerant is returned to the compressor through a screen and orifice in the suction accumulator J tube. Passing the liquid through the orifice causes a pressure drop; the liquid flashes to a vapor and creates a refrigeration affect. It is normal to see frost on the accumulator, suction line and compressor suction port in the freeze cycle.
REFRIGERANT CHARGE Refrigerant charge on QuietQube ice machines is very important. Overcharged or undercharged machines will normally fail in the harvest cycle (produces even sheets of ice, but will not harvest). Undercharged ice machines run out of liquid refrigerant in the receiver during harvest. This increases the harvest cycle time and results in a safety limit #2 failure.
ICE MACHINE WILL NOT HARVEST DIAGNOSTICS Ice relaease issues fall into two main categories mechanical or refrigeration. The first step in solving an ice release issue is to determine which condition exists. At the end of the harvest cycle place the toggle switch in the OFF position, then remove and inspect the sheet of ice. If the cubes are well defined and show no signs of melting a refrigeration problem is indicated.
ICE PRODUCTION CHECK The amount of ice a machine produces directly relates to the operating water and air temperatures. This means a condensing unit with a 70°F (21.2°C) outdoor ambient temperature and 50°F (10.0°C) water produces more ice than the same model condensing unit with a 90°F (32.2°C) outdoor ambient temperature and 70°F (21.2°C) water. 1. Determine the ice machine operating conditions: Air temp entering condenser:____° Air temp around ice machine:____° Water temp entering sump trough:____° 2.
1. Compare the results of step 3 with step 2. Ice production is normal when these numbers match closely. If they match closely, determine if: Another ice machine is required. More storage capacity is required. Relocating the existing equipment to lower the load conditions is required. Contact the local Manitowoc Distributor for information on available options and accessories.
Water System Checklist A water-related problem often causes the same symptoms as a refrigeration system component malfunction. Example: A water dump valve leaking during the Freeze cycle, a system low on charge, and a starving TXV have similar symptoms. Water system problems must be identified and eliminated prior to replacing refrigeration components.
Ice Formation Pattern Evaporator ice formation pattern analysis is helpful in ice machine diagnostics. Analyzing the ice formation pattern alone cannot diagnose an ice machine malfunction. However, when this analysis is used along with Manitowoc’s Refrigeration System Operational Analysis Table, it can help diagnose an ice machine malfunction. Any number of problems can cause improper ice formation.
Ice Formation Patterns 1. 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 at the evaporator inlet, than on the evaporator 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 more pronounced than those at the inlet. This is normal.
4. Spotty Ice Formation There are small sections on the evaporator where there is no ice formation. This could be a single corner or a single spot in the middle of the evaporator. Refer to Evaporator Tubing Routing on the previous page to determine your specific models tubing confirmation. This is generally caused by loss of heat transfer from the tubing on the backside of the evaporator. 5.
Safety Limits GENERAL In addition to standard safety controls, such as the high-pressure cutout, the control board has two built-in safety limit controls which protect the ice machine from major component failures. There are two control boards with different safety limit sequences. The microprocessor chip can identify 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 #2: If the harvest time reaches 3.5 minutes, the control board automatically returns the ice machine to the Freeze cycle. Control board with orange label and 302 on microprocessor. If 500 consecutive 3.5 minute harvest cycles occur, the ice machine stops. Control board with black microprocessor. If three consecutive 3.5-minute Harvest cycles occur, the ice machine stops.
SAFETY LIMIT INDICATION Control Board with Black Microprocessor When a safety limit condition causes the ice machine to stop, the harvest light on the control board continually flashes on and off. Use the following procedures to determine which safety limit has stopped the ice machine. 1. Move the toggle switch to OFF. 2. Move the toggle switch back to ICE. 3. Watch the harvest light.
When a safety limit condition is exceeded (6 consecutive cycles for safety limit #1 or 500 cycles for safety limit #2) the ice machine stops, and the harvest light on the control board flashes on and off. Use the following procedure to determine which safety limit has stopped the ice machine. 1. Move the toggle switch to OFF. 2. Move the toggle switch back to ICE. 3. Watch the harvest light.
Safety Limit #1 Refer to page 134 for description. Possible Cause Checklist Improper Installation Refer to “Installation/Visual Inspection Checklist” Water System Low water pressure (20 psig min.) High water pressure (80 psig max.) High water temperature (90°F/32.2°C max.
Safety Limit #2 Refer to page 134 for description. Possible Cause Checklist Improper Installation Refer to “Installation/Visual Inspection Checklist” Water System 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 Low water pressure (20 psig min.
ANALYZING DISCHARGE PRESSURE 1. Determine the ice machine operating conditions: Air temp. entering condenser ______ Air temp. around ice machine ______ Water temp. entering sump trough ______ 2. Refer to Cycle Times/24-Hour Ice Production/ Refrigeration Pressure Chart for ice machine being checked. Use the operating conditions determined in step 1 to find the published normal discharge pressures. Freeze Cycle ______ Harvest Cycle ______ 3. Perform an actual discharge pressure check.
Discharge Pressure High Checklist Problem Cause Improper Installation Refer to “Installation/Visual Inspection Checklist” Condenser Restriction High inlet air temperature Condenser discharge air recirculation Dirty condenser fins Defective fan cycling 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 li
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 diagno
Procedure Step 1. Determine the ice machine operating conditions. Example Using Q1000C Model Ice Machine Air temp. entering condenser: 90°F/32.2°C Air temp. around ice machine: 80°F/26.7°C Water temp. entering water fill valve: 70°F/21.1°C 2A. Refer to “Cycle Time” and “Operating Pressure” charts for ice machine model being checked. Using operating conditions from step 1, determine published Freeze cycle time and published Freeze cycle suction pressure. 2B.
Suction Pressure High Checklist Problem Cause Improper Installation Refer to “Installation/Visual Inspection Checklist” Discharge Pressure Discharge pressure is too high and 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
Suction Pressure Low Checklist Problem Cause Improper Installation Refer to “Installation/Visual Inspection Checklist” Discharge Pressure Discharge pressure is too low and is affecting suction pressure – refer to “Freeze Cycle Discharge Pressure 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 eva
COOL VAPOR VALVE The cool vapor valve is an electrically operated valve that opens when energized, and closes when deenergized. Normal Operation The valve is de-energized (closed) during the Freeze cycle and energized (open) during the Harvest cycle. The valve is positioned between the receiver and the evaporator and performs two functions: 1. Prevents refrigerant from entering the evaporator during the Freeze cycle. The cool vapor valve is not used during the Freeze cycle.
Cool Vapor Valve Analysis The valve can fail in two positions: Valve will not open in the Harvest cycle. Valve remains open during the Freeze cycle. Valve will not open in the Harvest cycle Although the circuit board has initiated a Harvest cycle, suction and discharge pressures remain unchanged from the Freeze cycle. The ice machine will remain in the Harvest cycle for 3.5 minutes (7 minutes QDUAL), then initiate a new Freeze cycle. After three consecutive Harvest cycles of 3.
Freeze Cycle Suction Line Temperature Analysis Suction line temperature alone cannot diagnose an ice machine. However, comparing this temperature during the Freeze cycle while using Manitowoc’s Refrigeration Component Analysis Chart, will help diagnose an ice machine malfunction. The actual temperature of the suction line varies by model and will change throughout the Freeze cycle. This makes documenting the “normal” suction line temperature difficult.
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REFRIGERATION COMPONENT DIAGNOSTIC CHARTS General All electrical and water-related problems must be corrected before these charts will work properly. These tables must be used with charts, checklists and other references to eliminate refrigeration components not listed and external items and problems that will cause good refrigeration components to appear defective. The tables list four different defects that may affect the ice machine’s operation. Procedure Step 1.
Column 1 – Cool Vapor Valve Leaking A leaking cool vapor valve must be replaced. Column 2 – Low Charge/TXV Starving Normally, a starving expansion valve only affects the Freeze cycle suction, discharge pressure and ice fill pattern. A low refrigerant charge will first affect the harvest cycle pressures. As more refrigerant is lost the freeze cycle pressures and fill pattern are affected. Verify the ice machine is not low on charge before replacing an expansion valve.
REFRIGERATION COMPONENT DIAGNOSTIC CHARTS Single Expansion Valve – Q0600C/0800C/Q1000C/SU1000C Operational Analysis 1 2 3 4 –152– Ice Production Published 24-hour ice 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.
Single Expansion Valve – Q0600C/0800C/Q1000C/SU1000C (Continued) Operational Analysis 1 2 3 4 Safety Limits Refer to “Analyzing Safety Limits” to eliminate all nonrefrigeration problems.
Single Expansion Valve – Q0600C/0800C/Q1000C/SU1000C (Continued) –154– Operational Analysis 1 2 3 4 Cool Vapor Valve Audible refrigerant flow through valve in Freeze cycle No audible refrigerant flow through valve in Freeze cycle No audible refrigerant flow through valve in Freeze cycle No audible refrigerant flow through valve in Freeze cycle Suction line temperature at the suction shut-off valve is greater than 10°F Suction line temperature at the suction shut-off valve is greater than 10°F
Dual Expansion Valve – Q1400C/QDUAL Operational Analysis 1 2 3 4 Ice Production Published 24-hour ice 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.
Dual Expansion Valve – Q1400C/QDUAL Operational Analysis 1 2 3 4 Safety Limits Refer to “Analyzing Safety Limits” to eliminate all nonrefrigeration problems.
Dual Expansion Valve – Q1400C/QDUAL –159– Operational Analysis 1 2 3 4 Cool Vapor Valve Audible refrigerant flow through left or right valve in Freeze cycle No audible refrigerant flow through left or right valve in Freeze cycle No audible refrigerant flow through left or right valve in Freeze cycle No audible refrigerant flow through left or right valve in Freeze cycle Suction line temperature at the suction shut-off valve is greater than 10°F Suction line temperature at the suction shut-off v
PRESSURE CONTROL SPECIFICATIONS AND DIAGNOSTICS Headmaster Control Valve FUNCTION The headmaster control valve maintains the correct discharge pressure and liquid line temperature in the Freeze and Harvest cycles. Manitowoc QuietQube® systems require headmaster control valves with special settings. Replace defective headmaster control valves only with “original” Manitowoc replacement parts.
HARVEST CYCLE OPERATION During the Harvest cycle, the cool vapor valve opens and allows refrigerant from the top of the receiver tank to enter the evaporator. The refrigerants change of state (from vapor to liquid) releases the heat necessary for the Harvest cycle. Opening the cool vapor valve causes a drop in discharge pressure.
DIAGNOSING AIR-COOLED CONDENSING UNITS Freeze Cycle 1. Determine the air temperature entering the remote condenser. 2. Determine if the head pressure is high or low in relationship to the outside temperature. (Refer to the proper “Operational Pressure Chart.”) If the air temperature is below 70°F (21.1°C), the head pressure control will modulate to maintain the correct liquid line temperature and head pressure. 3. Determine the temperature of the liquid line entering the receiver by feeling it.
FREEZE CYCLE HEADMASTER CONTROL VALVE FAILURE LIST CVD0875/CVD1075/CVD1475/CVD1875/CVD2075 Valve not maintaining pressures Non-approved valve. Install a Manitowoc head pressure control valve with proper setting. Discharge pressure extremely high; liquid line entering receiver feels hot Valve stuck in bypass. Replace valve. Fan cycling control cycles condenser fan motor; liquid line entering receiver fluctuates between warm and cold Valve not bypassing. Replace valve.
DIAGNOSING AIR-COOLED CONDENSING UNITS Harvest Cycle The headmaster control valve diverts the compressor discharge gas to 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 (completely bypass the condenser) in the harvest cycle are: Freeze cycle suction and discharge pressure are normal. The control board indicates safety limit #2. The failure seems to be temperature related.
Step 3 Details Grasp Here with Hands to Compare Temperatures No Flow R Flow t n a ger e f ri LIQUID LINE FROM CONDENSER HARVEST CYCLE HEADMASTER CONTROL VALVE FAILURE LIST CVD675/CVD0875/CVD1075/CVD1475/CVD1476/ CVD1875/CVD2075 Temperature of the compressor discharge line and liquid line to the ice machine receiver feel the same for the first 30 seconds of the harvest cycle. The headmaster is functioning correctly.
DIAGNOSING WATER-COOLED CONDENSING UNIT HEADMASTER VALVE Freeze Cycle The water regulating valve maintains the freeze cycle discharge pressure. Refer to water regulating valve diagnostics. Harvest Cycle The headmaster control valve diverts the compressor discharge gas to the ice machine receiver in the harvest cycle. All refrigerant flow through the condenser in the harvest cycle stops.
HEADMASTER CONTROL VALVE FAILURE LIST CVD1476 Freeze Cycle Valve not maintaining discharge pressure. The water regulating valve maintains the freeze cycle discharge pressure. Discharge pressure extremely high; Liquid line entering receiver feels hot. Verify 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.
REFRIGERANT CHARGE VERIFICATION QuietQube remote ice machines require the correct amount of refrigerant (name plate charge) to operate correctly at all ambient conditions. An ice machine with an over or under charge of refrigerant may function properly at higher ambient temperatures and fails at lower ambient temperatures. Symptoms of incorrect refrigerant are: Works during the day and then malfunctions at night. Safety limit #2 in control board memory. Harvest cycle suction pressure is low.
Overcharge Symptoms Safety limit #2 in control board memory. Harvest cycle suction pressure is low. Harvest cycle discharge 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).
Water Regulating Valve Function The water regulating valve maintains the freeze cycle discharge pressure. The valve setting for the CVD1476 condensing unit is 240 psig. Check Procedure 1. Determine if the head pressure is high or low (refer to “Operational Pressure Chart”. 2. Verify the condenser water meets specifications. 3. Adjust valve to increase or decrease discharge pressure (if discharge pressure remains high refer to “Headmaster Control Valve Diagnostics” before replacing valve). 4.
Fan Cycle Control CVD0875/CVD1075/CVD1475/CVD1875/CVD2075 FUNCTION Energizes and de-energizes the condenser fan motor. The condenser fan motor typically will be on in the Freeze cycle and off in the Harvest cycle. The fan cycle control closes on an increase, and opens on a decrease in discharge pressure. Model CVD0875 CVD1075 CVD1475 CVD1875 Specifications Cut-In (Close) Cut-Out (Open) CVD2075 250 psig ±5 200 psig ±5 250 psig ±5 275 psig ±5 200 psig ±5 225 psig ±5 CHECK PROCEDURE 1.
High Pressure Cutout (HPCO) Control FUNCTION Stops the ice machine if subjected to excessive highside pressure. The HPCO control is normally closed, and opens on a rise in discharge pressure. Specifications Cut-Out Cut-In 450 psig ±10 Automatic Reset (Must be below 300 psig to reset.) CHECK PROCEDURE 1. Set ICE/OFF/CLEAN switch to OFF. 2. Disconnect power to condensing unit. 3. Connect manifold gauges on condensing unit access valves. 4. Hook voltmeter in parallel across the HPCO, leaving wires attached. 5.
Low Pressure Cutout (LPCO) Control FUNCTION Energizes and de-energizes the contactor coil when suction pressure rises above or falls below setpoint. The LPCO control is closed at pressures above setpoint and opens at pressures below setpoint. Specifications Cut-Out 7 psig ±3 Cut-In 22 psig ±3 CHECK PROCEDURE 1. Connect manifold gauges at suction and discharge access valves at the condensing unit. 2. Set ICE/OFF/CLEAN switch to OFF. 3.
QUIETQUBE® TUBING SCHEMATICS Q0600C/Q0800C/Q1000C Condensing Unit SUCTION LINE FILTER COMPRESSOR CONDENSER ACCUMULATOR HEAD PRESSURE CONTROL VALVE S TRAP REQUIRED 21’ OR GREATER RISE Ice Machine Head Section HEAT EXCHANGER EVAPORATOR SUCTION SHUT-OFF VALVE TXV COOL VAPOR VALVE LIQUID LINE SHUT-OFF VALVE LLSV DRIER CHECK VALVE RECEIVER SERVICE VALVE RECEIVER –174–
Q1400C/QDUALC Condensing Unit SUCTION FILTER COMPRESSOR CVD1476 ONLY Water Regulating Valve CONDENSER ACCUMULATOR CVD1476 ONLY Condenser Water Outlet HEAD PRESSURE CONTROL VALVE DRIER S Trap Required 21’ or Greater Rise SUCTION SHUT-OFF VALVE LIQUID LINE SHUT-OFF VALVE HEAT EXCHANGER EVAPORATOR EVAPORATOR TXV LLSV COOL VAPOR VALVE RECEIVER SERVICE VALVE COOL VAPOR VALVE CHECK VALVE RECEIVER –175–
Cycle Times/24-Hour Ice Production/ Refrigerant Pressure Charts These charts are used as guidelines to verify correct ice machine operation. Accurate collection of data is essential to obtain the correct diagnosis. Refer to “OPERATIONAL ANALYSIS CHART” for the list of data that must be collected for refrigeration diagnostics.
Q0600C/CVD675 SERIES REMOTE AIR COOLED NOTE: These characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time 50/10.0 70/21.1 90/32.2 °F/°C -20 to 70/ 7.8-9.3 8.8-10.4 9.5-11.2 -29 to 21.1 80/26.7 8.0-9.4 8.9-10.5 9.7-11.4 .75-2.5 90/32.2 8.6-10.2 9.8-11.5 10.6-12.5 100/37.8 9.7-11.4 11.0-12.9 12.0-14.0 1Times in minutes. 24-HOUR ICE PRODUCTION Air Temp.
Q0800C/CVD875 SERIES REMOTE AIR COOLED NOTE: These characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time 50/10.0 70/21.1 90/32.2 °F/°C -20 to 70/ 9.4-10.8 10.5-12.1 11.4-13.1 -29 to 21.1 80/26.7 9.5-11.0 10.7-12.3 11.4-13.1 .75-2.5 90/32.2 10.3-11.9 11.2-12.9 12.1-13.8 100/37.8 11.2-12.9 12.3-14.1 13.3-15.2 1Times in minutes. 24-HOUR ICE PRODUCTION Air Temp.
Q1000C/CVD1075 SERIES REMOTE AIR COOLED NOTE: These characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time 50/10.0 70/21.1 90/32.2 °F/°C -20 to 70/ 9.9-10.6 10.8-11.6 11.8-12.6 -29 to 21.1 80/26.7 10.1-10.9 10.9-11.7 12.1-13.0 .75-2.5 90/32.2 10.6-11.4 11.5-12.3 12.8-13.7 100/37.8 11.6-12.5 12.6-13.5 14.0-15.0 1Times in minutes. 24-HOUR ICE PRODUCTION Air Temp.
SU1000C/SERVEND UC-300 DISPENSER/CVD1075 REMOTE AIR COOLED NOTE: These characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time 50/10.0 70/21.1 90/32.2 °F/°C -20 to 70/ 9.9-10.6 -29 to 21.1 80/26.7 10.1-10.9 90/32.2 10.6-11.4 100/37.8 11.6-12.5 1Times in minutes. 10.8-11.6 11.8-12.6 10.9-11.7 11.5-12.3 12.6-13.5 12.1-13.0 12.8-13.7 14.0-15.0 .75-2.
Q1400C/CVD1475 SERIES REMOTE AIR COOLED NOTE: These characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time 50/10.0 70/21.1 90/32.2 °F/°C -20 to 70/ 11.1-12.6 12.6-14.4 14.4-16.4 -29 to 21.1 90/32.2 11.3-12.9 12.9-14.7 14.8-16.8 .75-2.5 100/37.8 12.2-13.9 14.1-16.0 16.1-18.3 110/43.3 13.5-15.4 15.8-17.9 16.3-18.5 1Times in minutes. 24-HOUR ICE PRODUCTION Air Temp.
Q1400C/CVD1476 REMOTE WATER COOLED NOTE: These characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Cycle Time Air Temp. Freeze Time Entering Water Temperature °F/°C Condenser 50/10.0 70/21.1 90/32.2 °F/°C 35 to 70/ 10.7-12.7 1.6 to 21.1 80/26.7 10.8-12.9 90/32.2 10.9-13.0 100/37.8 10.9-13.0 1 Times in minutes. 12.4-14.7 14.6-17.3 12.5-14.9 12.6-15.0 12.7-15.0 14.7-17.4 14.8-17.5 14.9-17.6 Harvest Time .75-2.5 24-HOUR ICE PRODUCTION Air Temp.
QDUAL/CVD1875 REMOTE AIR COOLED NOTE: These characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time 50/10.0 70/21.1 90/32.2 °F/°C -20 to 70/ 10.8-11.6 11.9-12.7 12.8-13.7 -29 to 21.1 90/32.2 12.0-12.9 13.1-14.0 14.2-15.2 .75-2.5 100/37.8 13.1-14.0 14.3-15.4 15.7-16.8 110/43.3 14.9-16.0 16.2-17.4 17.4-18.6 1Times in minutes. 24-HOUR ICE PRODUCTION Air Temp.
QDUAL/CVD2075 REMOTE AIR COOLED NOTE: A Scroll compressor must be operated for a minimum break-in period of 72 hours before full ice production will be reached. These characteristics may vary depending on operating conditions. CYCLE TIMES Freeze Time + Harvest Time = Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Time Condenser 50/10.0 70/21.1 90/32.2 °F/°C -20 to 70/ 9.7-10.4 -29 to 21.1 90/32.2 10.1-10.8 100/37.8 10.8-11.6 110/43.3 12.0-12.9 1 Times in minutes. 10.9-11.7 11.
Refrigerant Recovery/Evacuation Do not purge refrigerant to the atmosphere. Capture refrigerant using recovery equipment. Follow the manufacturer’s recommendations. Important Manitowoc Ice, Inc. assumes no responsibility 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.
! Warning The receiver service valve (located in the ice machine head section) must be accessed during refrigerant recovery to allow complete removal of the refrigerant charge. CONNECTIONS MUST BE MADE AT THREE POINTS FOR COMPLETE REFRIGERANT RECOVERY ON ALL QUIETQUBE® MODELS. REFRIGERANT RECOVERY CONNECTIONS (Q1400C SHOWN) RECOVERY/EVACUATION PROCEDURES 1. Place the ICE/OFF/CLEAN toggle switch in the OFF position and disconnect all power to the ice machine and condensing unit. 2.
CHARGING PROCEDURES 1. Verify the ICE/OFF/CLEAN toggle switch is in the OFF position. 2. Close the vacuum pump valve and the low side manifold gauge valve. 3. Open the refrigerant cylinder and add the proper refrigerant charge (shown on nameplate) into the system high side (receiver service valve and discharge line shut-off valve). 4. If the high side does not take the entire charge, close the high side on the manifold gauge set.
SYSTEM CONTAMINATION CLEANUP General This section describes the basic requirements for restoring contaminated systems to reliable service. Important Manitowoc Ice, Inc. assumes no responsibility for the use of contaminated refrigerant. Damage resulting from the use of contaminated refrigerant is the sole responsibility of the servicing company.
Contamination Cleanup Chart Required Cleanup Procedure Symptoms/Findings No symptoms or suspicion of contamination Normal evacuation/recharging procedure Moisture/Air Contamination symptoms Refrigeration system open to atmosphere for longer than 15 minutes Refrigeration test kit and/or acid oil test shows contamination No burnout deposits in open compressor lines Mild contamination cleanup procedure Mild Compressor Burnout symptoms Oil appears clean but smells acrid Refrigeration
Cleanup Procedure MILD SYSTEM CONTAMINATION 1. Replace any failed components. 2. If the compressor is good, change the oil. 3. Replace the liquid line drier and suction filter. NOTE: If the contamination is from moisture, use heat lamps during evacuation. Position them at the compressor, condenser and evaporator prior to evacuation. Do not position heat lamps too close to plastic components, or they may melt or warp. Important Dry nitrogen is recommended for this procedure. This will prevent CFC release.
SEVERE SYSTEM CONTAMINATION 1. Remove the refrigerant charge. 2. Remove the compressor. 3. Cut copper tubing at the outlet of the cool vapor valve. If burnout deposits are found inside the tubing, replace the cool vapor 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. Important Refrigerant sweeps are not recommended, as they release CFCs into the atmosphere. 6.
Important Dry nitrogen is recommended for this procedure. This will prevent CFC release. 9. 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 system. Pressurize to a minimum of 5 psig. B. Change the vacuum pump oil. C. Pull vacuum to 500 microns. Break the vacuum with dry nitrogen and sweep the system. Pressurize to a minimum of 5 psig. D. Change the vacuum pump oil. E.
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 Low pressure cut-out control High side condensing unit access valve Low side condensing unit access valve Water regulating valve Important This is a required in-warranty repair procedure. 1.
FIG. A - “PINCHING OFF” TUBING FIG. B - RE-ROUNDING TUBING SV1406 USING PINCH-OFF TOOL NOTE: The pressure controls will operate normally once the tubing is re-rounded. Tubing may not reround 100%.
FILTER-DRIERS Liquid Line Filter-Drier The filter-driers used on Manitowoc ice machines are manufactured to Manitowoc specifications. The difference between a Manitowoc drier and an offthe-shelf drier is in filtration. A Manitowoc drier has dirt-retaining filtration, with fiberglass filters on both the inlet and outlet ends. This is very important because ice machines have a back-flushing action that takes place during every Harvest cycle.
Suction Line Filter The suction filter traps particulate only and does not contain a desiccant. The filter needs replacement when: 1. The pressure drop across the drier exceeds 2 psig. 2. The total system refrigerant charge has escaped and the refrigeration system has been exposed to the atmosphere. 3. A compressor is replaced. 4. Refrigeration system contains contaminants.
TOTAL SYSTEM REFRIGERANT CHARGE Important This information 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. 12 lbs. 192 oz. 0-100 ft. 11 lbs. 176 oz. 0-100 ft. CVD1075 12 lbs. 192 oz. 0-100 ft. Q1400C CVD1475 CVD1476 12.5 lbs. 192 oz. 0-100 ft.
REFRIGERANT OIL Manitowoc QuietQube ice machines use POE oil. The recommended lubricant is Mobil EAL22A. 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.
REFRIGERANT DEFINITIONS RECOVER To remove refrigerant, in any condition, from a system and store it in an external container, without necessarily testing or processing it in any way. RECYCLE To clean refrigerant for reuse by oil separation and single or multiple passes through devices, such as replaceable core filter-driers, which reduce moisture, acidity and particulate matter. This term usually applies to procedures implemented at the field job site or at a local service shop.
REFRIGERANT REUSE POLICY Manitowoc recognizes and supports the need for proper handling, reuse, and disposal of CFC and HCFC refrigerants. Manitowoc service procedures require recapturing refrigerants, not venting them to the atmosphere. It is not necessary, in or out of warranty, to reduce or compromise the quality and reliability of your customers' products to achieve this. Important Manitowoc Ice, Inc. assumes no responsibility for use of contaminated refrigerant.
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.
