Manitowoc FLAKE/CHIPLET QC0700 Service Manual
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Manitowoc FLAKE/CHIPLET QC0700 Service Manual

Manitowoc FLAKE/CHIPLET QC0700 Service Manual

Flake / chiplet model
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Flake / Chiplet Model
Ice Machines
Flake Models QF0400/QF0800/
QF2200/QF2300
Chiplet Models QC0700
Service
Manual
Part Number 80-1214-3
Revised 8/2003
07/03

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Summary of Contents for Manitowoc FLAKE/CHIPLET QC0700

  • Page 1 Flake / Chiplet Model Ice Machines Flake Models QF0400/QF0800/ QF2200/QF2300 Chiplet Models QC0700 Service Manual Part Number 80-1214-3 Revised 8/2003 07/03...

  • Page 2: Safety Notices

    Read and understand this manual. It contains valuable care and maintenance information. If you encounter problems not covered by this manual, do not proceed, contact Manitowoc Ice, Inc. We will be happy to provide assistance. Important Routine adjustments and maintenance procedures outlined in this manual are not covered by the warranty.

  • Page 3: Table Of Contents

    Section 1 General Information Model Numbers ..........How to Read a Model Number .
  • Page 4 Ice Machine Head Section Water Supply and Drains ....Potable Water Supply ......... . Potable Water Inlet Lines .
  • Page 5 Section 4 Ice Machine Sequence of Operation QF400/QC700/QF800 ..........Prior to Start-Up .
  • Page 6 Control Board ........... Component Specifications and Diagnostics .
  • Page 7 Refrigerant Recovery/Evacuation and Recharging ..... . Refrigerant Recovery/Evacuation ....... . . System Contamination Clean-Up .
  • Page 8 Table of Contents (continued) Revised 8/2003 Part No. 80-1214-3...

  • Page 9: Model Numbers

    RFC2385 sediment, and removing chlorine taste and odor. MANITOWOC CLEANER AND SANITIZER Manitowoc Ice Machine Cleaner and Sanitizer are available in convenient 16 oz. (473 ml) and 1 gal (3.78 l) bottles. These are the only cleaner and sanitizer approved for use with Manitowoc products.

  • Page 10: Model/Serial Number Location

    Model/Serial Number Location These numbers are required when requesting information from your local Manitowoc distributor, service representative, or Manitowoc Ice, Inc. The model and serial number are listed on the OWNER WARRANTY REGISTRATION CARD. They are also listed on the MODEL/SERIAL NUMBER DECAL affixed to the ice machine head section and condensing unit.

  • Page 11: General

    2. Repairs due to unauthorized modifications to the ice machine or use of non-standard parts without prior written approval from Manitowoc Ice, Inc. 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.
  • Page 12 General Information Section 1 THIS PAGE INTENTIONALLY LEFT BLANK Part No. 80-1214-3 Revised 8/2003...

  • Page 13: Ice Machine Dimensions

    Ice Machine Dimensions QF400 AIR COOLED ICE MACHINE 26” (66 CM) 3.04” (7.72 CM) 1.36” (3.5 CM) 26.5” (67.3 CM) Important Failure to follow these installation guidelines may affect warranty coverage. QC700/QF800 WATER COOLED ICE MACHINE (28.3 CM) Part No. 80-1214-3 Section 2 Installation Instructions QC700/QF800 AIR COOLED ICE MACHINE...

  • Page 14: Ice Machine Head Section And Remote Condensing Unit Dimensions

    Installation Instructions Ice Machine Head Section and Remote Condensing Unit Dimensions QF2200/QF2300 AND RFC2085/RFC2385 REMOTE CONDENSING UNIT 30” (76.2 CM) 2.8” (7.12 CM) 1.8” (4.6 CM) 9.8” (24.89 CM) 24.5” 34” (62.23 CM) (86.4 CM) 2.25” (5.72 CM) 4.5” (11.43 CM) 25.75”...

  • Page 15: Ice Machine Head Section Clearance Requirements

    Section 2 Location of Ice Machine The location selected for the ice machine 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. •...

  • Page 16: Leveling The Ice Storage Bin

    Installation Instructions Leveling the Ice Storage Bin 1. Screw the leveling legs onto the bottom of the bin. 2. Screw the foot of each leg in as far as possible. ! Caution The legs must be screwed in tightly to prevent them from bending.

  • Page 17: Minimum Circuit Ampacity

    Section 2 Electrical Service GENERAL Warning All wiring must conform to local, state and national codes. VOLTAGE The maximum allowable voltage variation is ±10% of the rated voltage on the ice machine model/serial number plate at start-up (when the electrical load is highest). Warning The ice machine must be grounded in accordance with national and local electrical codes.

  • Page 18: Electrical Requirements

    Installation Instructions Electrical Requirements Ice Machine Head Section Voltage Phase Maximum Machine Cycle Fuse/Circuit Breaker 115/1/60 QF400 230/1/50 115/1/60 QC700 230/1/50 230/1/60 115/1/60 QF800 230/1/50 230/1/60 115/1/60 QF2200 230/1/50 230/1/60 115/1/60 QF2300 230/1/50 230/1/60 Interconnecting wiring (115/60/1) is required between the ice machine and condensing unit to energize the contactor coil. * Indicates preliminary data Remote Condensing Unit Condensing Unit...

  • Page 19: Ice Machine Head Section Electrical Wiring Connections

    Section 2 Ice Machine Head Section Electrical Wiring Connections Warning These diagrams are not intended to show proper wire routing, wire sizing, disconnects, etc., only the correct wire connections. All electrical work, including wire routing and grounding, must conform to local, state and national electrical codes.

  • Page 20: Remote Electrical Wiring Connections

    Installation Instructions Remote Electrical Wiring Connections Warning These diagrams are not intended to show proper wire routing, wire sizing, disconnects, etc., only the correct wire connections. All electrical work, including wire routing and grounding, must conform to local, state and national electrical codes.

  • Page 21: Ice Machine Head Section Water Supply And Drains

    Section 2 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.

  • Page 22: Water Supply And Drain Line Sizing/Connections

    Installation Instructions WATER SUPPLY AND DRAIN LINE SIZING/CONNECTIONS ! Caution Plumbing must conform to state and local codes. Location Water Temperature 45°F (6°C) Min. Ice Making Water Inlet 90°F (32.2°C) Max. 33°F (0.6°C) Min. Condenser Water Inlet 90°F (32.2°C) Max. Condenser Water Drain Bin Drain...

  • Page 23: Refrigeration System Installation

    ! Caution The 60-month compressor warranty (including the 24- month labor replacement warranty) will not apply if the Manitowoc Ice Machine and remote Manitowoc Condensing Unit are not installed according to specifications. This warranty also will not apply if the...

  • Page 24: Refrigeration Line Set Installation

    Installation Instructions Refrigeration Line Set Installation GENERAL Refrigeration line set installations consist of vertical and horizontal line set distances between the ice machine and the condensing unit. The following guidelines, drawings and calculation methods must be followed to assure proper oil return and condensing unit/ice machine operation Warning The following instructions are provided as a general...

  • Page 25: Suction Line Oil Traps

    Section 2 C. SUCTION LINE OIL TRAPS ! Caution Do not form unwanted traps in refrigeration lines. Never coil excess refrigeration tubing. 0 to 20 feet (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 feet (6.1 m) without additional traps in the suction line.

  • Page 26: Installation Instructions

    Installation Instructions Step 4 Connecting the line set. To prevent oxidation of the copper, purge line set and condensing unit with dry nitrogen while brazing. Connect The Line Set To The Ice Machine Head Section Warning The ice machine head section contains refrigerant charge.

  • Page 27: Open Suction And Liquid Line Shut Off Valves

    Section 2 Step 5 Pressure Test and Evacuate The Line Set and Remote Condensing Unit 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).
  • Page 28 Installation Instructions Verify O-ring 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 Value’s Stem Caps Schrader Core Replace cap on receiver service valve and tighten. COUNTERCLOCKWISE RECEIVER SERVICE VALVE CAP (TURN COUNTERCLOCKWISE...
  • Page 29 Section 2 Suction Shut Off Valve Insulation The pre-formed suction shut-off valve insulation is located in the plastic bag taped to the water curtain. A. Verify valve and schrader caps are tightened to specifications (see Step 6). TIGHTEN VALVE CAPS TO SPECIFICATIONS B.
  • Page 30 Installation Instructions Section 2 THIS PAGE INTENTIONALLY LEFT BLANK 2-18 Part No. 80-1214-3 Revised 8/2003...

  • Page 31: Component Identification

    Component Identification ICE MACHINE HEAD SECTION QC700/QF800 CONDENSER FAN MOTOR ICE/OFF/CLEAN TOGGLE SWITCH QF400 WATER LEVEL WATER FLOAT PROBES VALVE COIL CONTROL ICE/OFF/CLEAN TOGGLE SWITCH CONDESER FAN/ MOTOR Part Number 80-1214-3 Section 3 Ice Machine Operation WATER LEVEL PROBE CLEANING SOLUTION FILL HOLE DUMP VALVE...

  • Page 32: Remote Condensing Units

    Ice Machine Operation QF2300 CLEANING SOLUTION FILL HOLE ICE/OFF/ CLEAN TOGGLE SWITCH ICE CHUTE WATER LEVEL PROBES CLEANING WATER SOLUTION RESERVOIR FILL HOLE ICE CHUTE RETAINING CLAMP ELECTRICAL EVAPORATOR COMPARTMENT GEAT MOTOR/ GEAR BOX ASSEMBLY SUCTION FILTER FLOAT VALVE ICE CHUTE ELBOW DUMP VALVE...

  • Page 33: Operational Checks

    Section 3 Operational Checks GENERAL Manitowoc ice machines are factory-operated and adjusted before shipment. Normally, a newly installed ice machine does not require any adjustment. To ensure proper operation, always follow the Operational Checks: • when starting the ice machine for the first time •...

  • Page 34: Interior Cleaning And Sanitizing

    An extremely dirty ice machine must be taken apart for cleaning and sanitizing. Manitowoc Ice Machine Cleaner and Sanitizer are the only products approved for use in Manitowoc ice machines. ! Caution...

  • Page 35: Cleaning The Condenser

    Section 3 CLEANING THE CONDENSER Warning Disconnect electric power to the ice machine and the remote condenser at the electric service switch before cleaning the condenser. Air-Cooled Condenser (SELF-CONTAINED AND REMOTE MODELS) A dirty condenser restricts airflow, resulting in excessively high operating temperatures. This reduces ice production and shortens component life.

  • Page 36: Manitowoc's Cleaning Technology

    Step 3 Remove the 1 1/2” yellow plug from the top cover of the water reservoir. Wait about one minute or until the dump valve light de-energizes, then add the proper amount of Manitowoc Ice Machine Cleaner and re-install plug. Step 4 .The ice machine will automatically time out four flush and rinse cycles, and then stop.

  • Page 37: Preventative Maintenance Cleaning Procedure

    Step 3 Wait about one minute or until the dump valve light de-energizes. Lift the front cover on the water reservoir and add the proper amount of Manitowoc Ice Machine Cleaner. Model Part Number 000000084...

  • Page 38: Ice Machine Operation

    Ice Machine Operation CLEANING/SANITIZING PROCEDURE QC700/QF800/QF2300 Use Ice machine cleaner part number 000000084. Use Ice machine sanitizer part number 94-0565-3. Step 1 Remove front and top covers and set the toggle switch to the OFF position. Step 2 Remove all ice from the bin. Step 3 Disconnect water supply line at float valve quick disconnect by depressing stainless steel lever.

  • Page 39: Sanitizing Procedure

    Section 3 CLEANING/SANITIZING PROCEDURE QF400 Use Ice machine cleaner part number 000000084. Use Ice machine sanitizer part number 94-0565-3. Step 1 Set the toggle switch to the OFF position and remove all ice from the bin. Step 2 Remove the 2 thumbscrews and white plastic panel.

  • Page 40: Procedure To Clean Heavily Scaled Flake/Chiplet Ice Machines

    Ice Machine Operation PROCEDURE TO CLEAN HEAVILY SCALED FLAKE/CHIPLET ICE MACHINES QF400/QC700/QF800/QF2300 Step 1 Remove front and top covers, set the toggle switch to the OFF position.Remove all ice from the bin. Step 2 Remove front and top covers and set the toggle switch to the OFF position.

  • Page 41: Removal Of Parts For Cleaning/Sanitizing

    Section 3 REMOVAL OF PARTS FOR CLEANING/SANITIZING 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. ! Caution Do not mix Cleaner and Sanitizer solutions together.
  • Page 42 Ice Machine Operation Water Level Probe Removal QF400/QC700/QF800/QF2300 Water Level Probe Removal 1. Place the toggle switch in the OFF position, turn off the water supply and disconnect electrical power to the ice machine. 2. Disconnect water supply line at float valve quick disconnect by depressing stainless steel lever.
  • Page 43 Section 3 Water Reservoir Cover Removal QF2300 1. Place the toggle switch in the OFF position, turn off the water supply and disconnect electrical power to the ice machine. 2. Remove water level probes. 3. Remove water float valve coil. 4.
  • Page 44 Ice Machine Operation Water Reservoir Removal 1. Place the toggle switch in the OFF position and turn off the water supply to the ice machine at the water service valve. 2. Disconnect water supply line at float valve quick disconnect by depressing stainless steel lever. 3.
  • Page 45 Section 3 Ice Chute Removal QC700/QF800 1. Follow steps to remove float reservoir. 2. The ice chute and ice chute grommet will be removed as a unit. Pull forward on the top of the ice chute, and slide the ice chute and grommet off the end of the evaporator spout.
  • Page 46 Ice Machine Operation Bin Door Removal QF0400 Door removal allows easier access for cleaning and sanitizing. 1. Disconnect the electrical power to the ice machine and remove ice from bin. 2. Grasp the rear of the bin door and pull bin door forward approximately 5”.
  • Page 47 Section 3 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 water trough to determine if the dump valve is leaking.

  • Page 48: Removal From Service/Winterization

    Ice Machine Operation Removal from Service/Winterization GENERAL Special precautions must be taken if the ice machine head section 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...

  • Page 49: Qf400/Qc700/Qf800

    Ice Machine Sequence of Operation QF400/QC700/QF800 PRIOR TO START-UP When the toggle switch is placed in the “ice” position the following must occur prior to starting an ice making cycle. A. The bin level probe must be open (bin level light off).

  • Page 50: Flush Sequence In The "Ice" Position

    Ice Machine Sequence of Operation QF2200 PRIOR TO START-UP When the toggle switch is placed in the “ice” position the following must occur prior to starting an ice making cycle. A. The bin level probe must be open (bin level light off).

  • Page 51: Flush Sequence In The "Ice" Position

    Section 4 QF2300 PRIOR TO START-UP When the toggle switch is placed in the “ice” position the following must occur prior to starting an ice making cycle. A. The bin level probe must be open (bin level light off). If the probe is closed, (bin level light on) when the toggle switch is moved to ICE, the control system waits until the bin level probe opens, (bin level light off) before starting an ice...
  • Page 52 Ice Machine Sequence of Operation Section 4 THIS PAGE INTENTIONALLY LEFT BLANK Part No. 80-1214-3...

  • Page 53: Checklist

    Checklist Problem Ice machine does not operate. No electrical power to the ice machine. Control Board fuse open ICE/OFF/CLEAN toggle switch set improperly. 8 minute lockout has not expired. Bin level sensor is disconnected or is contacting the ice. High Pressure Control is open. Gear Motor runs but Water reservoir is empty.

  • Page 54: Safeguard Indicator Lights

    Troubleshooting Safeguard Feature In addition to standard safety controls, your Manitowoc ice machine features built-in SafeGuards. The ice machine will stop when conditions arise that would cause major component failure. RESET PROCEDURE 1. Move the ICE/OFF/CLEAN toggle switch to OFF and then back to ICE.

  • Page 55: Safeguard Modes

    Section 5 Analyzing Why SafeGuards May Stop the Ice Machine According to the refrigeration industry, a high percentage of compressor failure are the result of external causes. These can include flooding or starving expansion valves, dirty condensers, water loss to the ice machine, etc.

  • Page 56: Troubleshooting

    Troubleshooting Gear Motor Speed Anytime the motor speed sensor detects the motor speed (rpm) is below the minimum range for 3 continuous seconds, the ice machine will: 1. De-energize the compressor and/or gear motor. 2. Continuously flash the Gear Motor Speed light. 3.
  • Page 57 Section 5 Temperature is Too High or Low QF400/QC700/QF800 The temperature sensor (thermistor) is mounted on the compressor discharge line. The temperature sensor provides input to the control board. The control board monitors the temperature anytime the compressor is energized. If the thermistor detects 245°F or higher for 15 continuous seconds: 1.
  • Page 58 Troubleshooting Temperature is Too High or Low QF2200 Only The temperature sensor (thermistor) is mounted on the liquid line. The temperature sensor provides input to the control board. The control board monitors the temperature anytime the liquid line solenoid valve is energized.

  • Page 59: Gear Box Removal

    Section 5 Gear Box Removal QF400 The evaporator and motor / gearbox are separate assemblies. Warranty procedures require replacement of the entire evaporator or motor /gearbox assembly. Separate components are not available, and field rebuilding during the warranty period is not allowed. 1.

  • Page 60: Troubleshooting Section

    Troubleshooting QF2200/QF2300 The evaporator and motor / gearbox are separate assemblies. Warranty procedures require replacement of the entire evaporator or motor /gearbox assembly. Separate components are not available, and field rebuilding during the warranty period is not allowed. 1. Disconnect power and water supply to the ice machine and drain all water from the reservoir and evaporator.

  • Page 61: Evaporator Removal

    Section 5 Evaporator Removal QF400 The evaporator and motor / gearbox are separate assemblies. Warranty procedures require replacement of the entire evaporator or motor /gearbox assembly. Separate components are not available, and field rebuilding during the warranty period is not allowed. 1.
  • Page 62 Troubleshooting QF2200/QF2300 The evaporator and motor / gearbox are separate assemblies. Warranty procedures require replacement of the entire evaporator or motor /gearbox assembly. Separate components are not available, and field rebuilding during the warranty period is not allowed. 1. Disconnect power and water supply to the ice machine and drain all water from the reservoir and evaporator.

  • Page 63: Energized Parts Charts

    Energized Parts Charts QF400/QC700/QF800 Control Relays Ice Making Sequence Of Contactor Dump Operation Coil Valve START-UP 1A. Water Flush 1B. Water Fill FREEZE SEQUENCE 2. Freeze AUTOMATIC SHUT-OFF 3A. Ice Run 3B. Drain Evaporator AUTOMATIC SHUT-OFF When the toggle switch is placed in the ICE position, the following must occur prior to starting an ice making cycle. A.)The bin level probe must be open (Bin Level light off).

  • Page 64: Qf2200

    Electrical System Energized Parts Charts QF2200 Control Relays Ice Making Sequence Liquid Line Dump Solenoid Operation Valve Valve START-UP 1A. Water Flush 1B. Water Fill FREEZE SEQUENCE 2. Freeze AUTOMATIC SHUT-OFF 3A. Ice Run 3B. Drain Evaporator AUTOMATIC SHUT-OFF *After the liquid line solenoid valve energizes, the suction pressure will rise above the low-pressure switch cut-in (22 psig) and the compressor and condenser fan motor energize.

  • Page 65: Qf2300

    Section 6 Energized Parts Charts QF2300 Ice Making Liquid Line Sequence Of Solenoid/ Operation Equalization Valve/ Compressor START-UP 1A. Water Flush 1B. Water Fill FREEZE SEQUENCE 2. Freeze AUTOMATIC SHUT-OFF 3A. Ice Run 3B. Drain Evaporator AUTOMATIC SHUT-OFF When the toggle switch is placed in the ICE position, the following must occur prior to starting an ice making cycle. A.)The bin level probe must be open (Bin Level light off).

  • Page 66: Wiring Diagram Sequence Of Operation

    Electrical System Wiring Diagram Sequence of Operation QF400 Initial Start-Up or Start-Up After Automatic Shut-Off 1A. WATER FLUSH Immediately after placing the toggle switch in “ICE”, the dump valve solenoid, and gearbox are energized. After 45 seconds the dump valve de- energizes.

  • Page 67: Electrical System

    Section 6 Initial Start-Up or Start-Up After Automatic Shut-Off (cont.) 1B. WATER FILL After 45 seconds the float valve solenoid is energized. Toggle Switch Bin Level Probe Control Board Relays Contactor Coil Compressor Condenser Fan Motor Dump Valve Gear Motor Water Float Valve Solenoid Coil Part No.
  • Page 68 Electrical System Freeze Cycle 2. FREEZE The gear motor, compressor, condenser fan motor and water float valve solenoid remain energized as the ice machine makes ice. The water float valve will open and close automatically to maintain the proper water level. 2.
  • Page 69 Section 6 Automatic Shut-Off 3A. ICE RUN OUT Ice will build up in the bin until it contacts the bin level probe. After ice contacts the bin level probe for 30 continuous seconds the compressor de-energizes. To allow excess ice to run out, the gear motor and the water float valve solenoid remain energized for an additional 45 seconds, then...
  • Page 70 Electrical System Automatic Shut-Off 3B. DRAIN EVAPORATOR To allow water to drain from the evaporator, the dump valve energizes for 45 seconds, then de-energizes. Toggle Switch Bin Level Probe Control Board Relays Contactor Coil Compressor Condenser Fan Motor Dump Valve Gear Motor Water Float Valve Solenoid Coil GROUND...
  • Page 71 Section 6 Automatic Shut-Off An 8 minute lockout starts when the compressor de-energizes. When the ice drops away from the bin level probe the ice machine will begin an initial start-up cycle, provided the “8 minute lock-out” has expired. 8 Minute Lock-out The bin level light will flash until the 8 minute lock-out expires.

  • Page 72: Qc700/Qf800

    Electrical System Wiring Diagram Sequence of Operation QC700/QF800 Initial Start-Up or Start-Up After Automatic Shut-Off 1A. WATER FLUSH Immediately after placing the toggle switch in “ICE”, the dump valve solenoid, and gearbox are energized. After 45 seconds the dump valve de- energizes.
  • Page 73 Section 6 Initial Start-Up or Start-Up After Automatic Shut-Off (cont.) 1B. WATER FILL After 45 seconds the float valve solenoid is energized. Toggle Switch Bin Level Probe Control Board Relays Contactor Coil Compressor Condenser Fan Motor Dump Valve Gear Motor Water Float Valve Solenoid Coil Part No.
  • Page 74 Electrical System Freeze Cycle 2. FREEZE The gear motor, compressor, condenser fan motor and water float valve solenoid remain energized as the ice machine makes ice. The water float valve will open and close automatically to maintain the proper water level. 2.
  • Page 75 Section 6 Automatic Shut-Off 3A. ICE RUN OUT Ice will build up in the bin until it contacts the bin level probe. After ice contacts the bin level probe for 30 continuous seconds the compressor de-energizes. To allow excess ice to run out, the gear motor and the water float valve solenoid remain energized for an additional 45 seconds, then...
  • Page 76 Electrical System Automatic Shut-Off 3B. DRAIN EVAPORATOR To allow water to drain from the evaporator, the dump valve energizes for 45 seconds, then de-energizes. Toggle Switch Bin Level Probe Control Board Relays Contactor Coil Compressor Condenser Fan Motor Dump Valve Gear Motor Water Float Valve Solenoid Coil 6-14...
  • Page 77 Section 6 Automatic Shut-Off An 8 minute lockout starts when the compressor de-energizes. When the ice drops away from the bin level probe the ice machine will begin an initial start-up cycle, provided the “8 minute lock-out” has expired. 8 Minute Lock-out The bin level light will flash until the 8 minute lock-out expires.

  • Page 78: Qf2200

    Electrical System Wiring Diagram Sequence of Operation QF2200 Initial Start-Up or Start-Up After Automatic Shut-Off 1A. WATER FLUSH Immediately after placing the toggle switch in “ICE”, the dump valve solenoid, and gearbox are energized. After 45 seconds the dump valve de- energizes.
  • Page 79 Section 6 RFC2085 Initial Start-Up Remote Condensing Unit 1A. WATER FLUSH The condensing unit is off. High Pressure Control Low Pressure Control Contactor Coil Compressor Condenser Fan Motor Part No. 80-1214-3 GROUND (94) (96) HIGH PRESSURE LOW PRESSURE CUT-OUT CONTACTOR CONTACTS FAN MOTOR (49)
  • Page 80 Electrical System QF2200 Initial Start-Up 1B. WATER FILL After 45 seconds the water float valve solenoid is energized. When water contacts the water level probe the liquid line solenoid valve energizes and remains on throughout the Freeze Cycle. Toggle Switch Bin Level Probe Control Board Relays Liquid Line Solenoid Valve...
  • Page 81 Section 6 RFC2085 Initial Start-Up 1B. WATER FILL The condensing unit is off. 1B. Water Flush (Until Water Contacts Water Level Probe) High Pressure Control Low Pressure Control Contactor Coil Compressor Condenser Fan Motor Part No. 80-1214-3 GROUND (94) (96) LOW PRESSURE HIGH PRESSURE CUT-OUT...
  • Page 82 Electrical System QF2200 Freeze Cycle 2. FREEZE The gear motor, liquid line solenoid valve and water float valve solenoid remain energized as the ice machine makes ice. The water float valve will open and close automatically to maintain the proper water level. 2.
  • Page 83 Section 6 RFC2085 Freeze Cycle 2. FREEZE Refrigerant pressure exceeds the low pressure control setpoint. The contactor coil energizes and the contacts close. The compressor and condenser fan motor energize and remain on throughout the entire freeze cycle. 2. Freeze (Until Ice Contacts Bin Level Probe for 30 Continuous Seconds) High Pressure Control Low Pressure Control Contactor Coil...
  • Page 84 Electrical System QF2200 Automatic Shut-Off 3A. ICE RUN OUT Ice will build up in the bin until it contacts the bin level probe. After ice contacts the bin level probe for 30 continuous seconds the liquid line solenoid valve de-energizes. To allow excess ice to run out, the gear motor and the water float valve solenoid remain energized for an additional 4...
  • Page 85 Section 6 RFC2085 Automatic Shut-Off When the refrigerant pressure is low enough to open the low-pressure switch, the contactor coil is de- energized and the compressor and condenser fan motor stop. High Pressure Control Low Pressure Control Contactor Coil Compressor Condenser Fan Motor Part No.
  • Page 86 Electrical System QF2200 Automatic Shut-Off 3B. WATER DRAIN To allow water to drain from the evaporator, the dump valve energizes for 90 seconds, then de-energizes. An 8 minute lockout starts when the compressor de-energizes. When the ice drops away from the bin level probe the ice machine will begin an initial start-up cycle, provided the “8 minute lockout”...
  • Page 87 Section 6 QF2200 Automatic Shut-Off An 8 minute lockout starts when the compressor de-energizes. When the ice drops away from the bin level probe the ice machine will begin an initial start-up cycle, provided the “8 minute lockout” has expired. 8 Minute Lockout The bin level light will flash until the 8 minute lockout expires.

  • Page 88: Qf2300

    Electrical System Wiring Diagram Sequence of Operation QF2300 Initial Start-Up or Start-Up After Automatic Shut-Off 1A. WATER FLUSH Immediately after placing the toggle switch in “ICE”, the dump valve solenoid, and gearbox are energized. After 45 seconds the dump valve de- energizes.
  • Page 89 Section 6 RFC2385 Initial Start-Up Remote Condensing Unit 1A. WATER FLUSH Immediately after placing the toggle switch in “ICE”, the dump valve solenoid, and gearbox are energized. After 45 seconds the dump valve de- energizes. High Pressure Control Low Pressure Control Contactor Coil Compressor Condenser Fan Motor...
  • Page 90 Electrical System QF2300 Initial Start-Up 1B. WATER FILL After 45 seconds the water float valve solenoid is energized. Toggle Switch Bin Level Probe Control Board Relays Liquid Line Solenoid Valve Dump Valve Gear Motor Water Float Valve Solenoid Coil 6-28 GROUND RELAY (25)
  • Page 91 Section 6 RFC2385 Initial Start-Up 1B. WATER FILL After 45 seconds the water float valve solenoid is energized. 1B. Water Flush (Until Water Contacts Water Level Probe) High Pressure Control Low Pressure Control Contactor Coil Compressor Condenser Fan Motor Part No. 80-1214-3 GROUND (94) (96)
  • Page 92 Electrical System QF2300 Ice Machine Head Section Freeze Cycle 2. FREEZE When water contacts the water level probe the liquid line solenoid valve, equalization valve, compressor and condenser fan motor energize. The gear motor, compressor, condenser fan motor and water float valve solenoid remain energized as the ice machine makes ice.
  • Page 93 Section 6 RFC2385 Freeze Cycle 2. FREEZE The compressor and condenser fan motor remain energized during the entire Freeze Cycle. 2. Freeze (Until Ice Contacts Bin Level Probe for 30 Continuous Seconds) High Pressure Control Low Pressure Control Contactor Coil Compressor Condenser Fan Motor Part No.
  • Page 94 Electrical System QF2300 Automatic Shut-Off 3A. ICE RUN OUT Ice will build up in the bin until it contacts the bin level probe. After ice contacts the bin level probe for 30 continuous seconds the liquid line solenoid valve, equalization valve and compressor de-energize.
  • Page 95 Section 6 RFC2385 Automatic Shut-Off When the refrigerant pressure is low enough to open the low-pressure switch, the contactor coil is de- energized and the compressor and condenser fan motor stop. High Pressure Control Low Pressure Control Contactor Coil Compressor Condenser Fan Motor Part No.
  • Page 96 Electrical System QF2300 Automatic Shut-Off 3B. WATER DRAIN To allow water to drain from the evaporator, the dump valve energizes for 90 seconds, then de-energizes. An 8 minute lockout starts when the compressor de-energizes. When the ice drops away from the bin level probe the ice machine will begin an initial start-up cycle, provided the “8 minute lockout”...
  • Page 97 Section 6 QF2300 Automatic Shut-Off An 8 minute lockout starts when the compressor de-energizes. When the ice drops away from the bin level probe the ice machine will begin an initial start-up cycle, provided the “8 minute lockout” has expired. 8 Minute Lockout The bin level light will flash until the 8 minute lockout expires.

  • Page 98: Wiring Diagram Legend

    Electrical System Wiring Diagrams The following pages contain electrical wiring diagrams. Be sure you are referring to the correct diagram for the ice machine which you are servicing. Warning Always disconnect power before working on electrical circuitry. WIRING DIAGRAM LEGEND The following symbols are used on all of the wiring diagrams: Internal Compressor Overload (Some models have external compressor overloads)

  • Page 99: Qf400

    Section 6 SEE SERIAL PLATE FOR VOLTAGE GROUND (21) (25) (52) (22) (51) CONTACTOR CONTACTS TOGGLE SWITCH WIRING CONTROL BOARD CONNECTOR (20) (23) CLEAN TOGGLE SWITCH (19) Part No. 80-1214-3 ICE MACHINE HEAD SECTION QF400 115V/60Hz/1Ph - 230V/50Hz/1Ph (Diagram Shown During Freeze Cycle) RELAY RELAY (90)

  • Page 100: Qc700/Qf800

    Electrical System SEE SERIAL PLATE FOR VOLTAGE GROUND (21) RELAY (25) RELAY (52) (22) (51) TOGGLE SWITCH WIRING CONTROL BOARD CONNECTOR (20) (23) CLEAN TOGGLE SWITCH (19) 6-38 QC700/QF800 115V/60Hz/1Ph - 230V/50Hz/1Ph (Diagram Shown During Freeze Cycle) HIGH RELAY PRESSURE CUTOUT (90) 10 AMP...

  • Page 101: Compressor Section

    Section 6 Electrical System COMPRESSOR SECTION QC700/QF800 115/60/1 - 230/50/1 (Diagram Shown During Freeze Cycle) FAN MOTOR (AIR-COOLED ONLY) (42) COMPRESSOR “START” COMPRESSOR POTENTIAL RELAY (C5) (C2) (43) GEARMOTOR COMPRESSOR (45) “RUN” FAN MOTOR (C4) (AIR-COOLED ONLY) (61) (C1) (62) (56) (22) (44)

  • Page 102: Qf2200

    Electrical System SEE SERIAL PLATE FOR VOLTAGE (L1) GROUND (21) RELAY TOGGLE SWITCH WIRING CONTROL BOARD CONNECTOR (20) (23) CLEAN TOGGLE SWITCH (19) 6-40 ICE MACHINE HEAD SECTION QF2200 115/60/1 - 230/50/1 (Diagram Shown During Freeze Cycle) RELAY RELAY 10 AMP FUSE RELAY (65)
  • Page 103 Section 6 (94) (96) HIGH PRESSURE CUTOUT CONTACTOR CONTACTS OVERLOAD Part No. 80-1214-3 RFC2085 230V/60HZ/1PH - 230/50/1 (Diagram Shown During Freeze Cycle) COMPRESSOR CRANKCASE HEATER LOW PRESSURE CUTOUT FAN MOTOR RUN CAPACITOR (49) COMPRESSOR RUN CAPACITOR (47) (46) (48) RELAY (43) Revised 8/2003 Electrical System...
  • Page 104 Electrical System 6-42 RFC2085 208-230V/60HZ/3PH (Diagram Shown During Freeze Cycle) COMPRESSOR CRANKCASE HEATER (94) (96) HIGH PRESSURE LOW PRESSURE CUTOUT CUTOUT CONTACTOR CONTACTS COMPRESSOR Revised 8/2003 Section 6 (95) (74) CONTACTOR COIL FAN MOTOR RUN CAPACITOR SV3013 Part No. 80-1214-3...

  • Page 105: Qf2300

    Section 6 SEE SERIAL PLATE FOR VOLTAGE (L1) GROUND (51) (22) TOGGLE SWITCH WIRING CONTROL BOARD CONNECTOR (20) (23) CLEAN TOGGLE SWITCH (19) Part No. 80-1214-3 ICE MACHINE HEAD SECTION QF2300 115/60/1 - 230/50/1 (Diagram Shown During Freeze Cycle) (91) RELAY RELAY 7 AMP...
  • Page 106 Electrical System (94) HIGH PRESSURE (96) CONTACTOR CONTACTS OVERLOAD 6-44 RFC2385 230V/60HZ/1PH - 230/50/1 (Diagram Shown During Freeze Cycle) COMPRESSOR CRANKCASE HEATER CUTOUT (85) FAN MOTOR RUN CAPACITOR (49) COMPRESSOR RUN CAPACITOR (47) (46) (48) RELAY (43) Revised 8/2003 (95) CONTACTOR COIL (74)
  • Page 107 Section 6 L2 L3 Part No. 80-1214-3 RFC2385 208-230V/60HZ/3PH (Diagram Shown During Freeze Cycle) COMPRESSOR CRANKCASE HEATER (94) HIGH PRESSURE CUTOUT (85) (96) CONTACTOR CONTACTS COMPRESSOR Revised 8/2003 Electrical System (95) CONTACTOR COIL (74) FAN MOTOR RUN CAPACITOR SV2108a 6-45...

  • Page 108: Control Board

    Electrical System Control Board AC LINE VOLTAGE ELECTRICAL PLUG CLEAN LIGHT FULL BIN LIGHT DISCHARGE TEMP LIGHT COMPRESSOR LIGHT WATER SOLENOID LIGHT WATER LEVEL LIGHT DUMP VALVE LIGHT SPEED LIGHT GEARMOTOR LIGHT (20) CLEAN TOGGLE SWITCH 6-46 YELLOW GREEN GREEN GREEN GREEN (23)

  • Page 109: Component Specifications And Diagnostics

    Section 6 Component Specifications and Diagnostics ICE/OFF/CLEAN TOGGLE SWITCH Function The switch is used to place the ice machine in ICE, OFF or CLEAN mode of operation. Specifications Single-pole, single-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.
  • Page 110 CONNECTOR TO GROUND. Continuity Replace bin level probe. 3. Remove bin level probe from ice chute and clean with Manitowoc Ice Machine Cleaner and Sanitizer. Rinse well with fresh water, reinstall and monitor the Bin light. Control Board Bin Level Light Flashes 4.

  • Page 111: Motor Speed Sensor

    Section 6 MOTOR SPEED SENSOR Function The motor speed sensor verifies that the gearbox motor is rotating at the correct speed. Failure Modes MOTOR SPEED SENSOR OPEN OR DISCONNECTED (ICE MACHINE WILL NOT START.) Performs initial start-up procedure. Ten to 15 seconds after the ice machine enters Water Flush (1), the ice machine will initiate an Automatic Shut-Off cycle, flash the Speed light and remain off for 60 minutes.

  • Page 112: Water Level Probes

    Electrical System WATER LEVEL PROBES Function The water level probe protects the compressor if water is not detected. Water contacting the probes will complete the circuit and energize the Water Level Probe light. There are two water level probes; one probe is connected to the circuit board and one probe is connected to the ice machine ground.
  • Page 113 Section 6 4. Disconnect water level probe from control board. Install jumper from control board “water level” terminal to ground. 5. Move the toggle switch from ICE to OFF to ICE position. Wait 45 seconds, then monitor the Water Level Probe light.

  • Page 114: Temperature Sensor

    Electrical System TEMPERATURE SENSOR Function The temperature sensor provides input to the control board. The control board monitors the temperature anytime the liquid line solenoid valve or compressor is energized. When a temperature is sensed that is above or below the correct temperature range, the ice machine de-energizes.

  • Page 115: Control Board Relays

    Section 6 CONTROL BOARD RELAYS Function The control board relays energize and de-energize system components. Specifications Relays are not field replaceable. There are four relays on the control board: Relay Water Dump Valve Check Procedure 1. Leave all wiring connected and refer to the Energized Parts Chart.

  • Page 116: Water Float Valve

    Electrical System WATER FLOAT VALVE Function The float valve maintains correct water level during the Freeze cycle. It allows the evaporator to drain completely during the Automatic Shut-Off cycle. Check Procedure 1. Verify water is supplied to the float valve, the water inlet screen is clean, and the float and float arm are free moving.

  • Page 117: High Pressure Control

    Section 6 HIGH PRESSURE CONTROL (HPCO) Function The high pressure control stops the ice machine if subjected to excessive high-side pressure. The HPCO control is normally closed, and opens on a rise in discharge pressure. Specifications Cut-out:450 psig ±10 Cut-in:Automatic reset (must be below 300 psig to reset).

  • Page 118: Fan Cycle Control

    Electrical System FAN CYCLE CONTROL Function Cycles the condenser fan motor on and off to maintain proper operating discharge pressure. The fan cycling control closes on an increase in discharge pressure and opens on a decrease in discharge pressure. Model Cut-In (Close) QF0800 250 psig +/- 5...

  • Page 119: Compressor Electrical Diagnostics

    Section 6 COMPRESSOR ELECTRICAL DIAGNOSTICS The compressor will 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.
  • Page 120 Electrical System 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.

  • Page 121: Diagnosing An Ice Machine That Will Not Run

    Section 6 Diagnosing An Ice Machine That Will Not QF400/QC700/QF800/QF2200/QF2300 Warning High (line) voltage is applied to the control board (terminals #55 and #56) at all times. Removing control board fuse or moving the toggle switch to OFF will not remove the power supplied to the control board.
  • Page 122 Electrical System Section 6 THIS PAGE INTENTIONALLY LEFT BLANK 6-60 Part No. 80-1214-3 Revised 8/2003...

  • Page 123: Refrigeration System

    Section 7 Refrigeration System Tubing Schematic QF400/QC700/QF800 DRIER EXPANSION VALVE EVAPORATOR RECEIVER (QF400) CONDENSER (AIR OR WATER) COMPRESSOR SV3082 Part No. 80-1214-3 Revised 8/2003...

  • Page 124: Qf2200/Rfc2085

    Refrigeration System Section 7 QF2200/RFC2085 Condensing Unit SUCTION LINE COMPRESSOR FILTER CONDENSER HEAD PRESSURE CONTROL VALVE S TRAP REQUIRED 21’ OR GREATER RISE Ice Machine Head Section SUCTION LIQUID LINE SHUT-OFF SHUT-OFF VALVE VALVE LLSV HEAT EXCHANGER EVAPORATOR DRIER CHECK VALVE RECEIVER SERVICE VALVE...

  • Page 125: Qf2300/Rfc2385

    Section 7 Refrigeration System QF2300/RFC2385 Condensing Unit SUCTION LINE COMPRESSOR FILTER CONDENSER HEAD PRESSURE SUCTION CONTROL ACCUMULATOR VALVE S TRAP REQUIRED 21’ OR GREATER RISE Ice Machine Head Section SUCTION LIQUID LINE SHUT-OFF SHUT-OFF VALVE VALVE LLSV EVAPORATOR DRIER EQUALIZATION VALVE CHECK VALVE RECEIVER...

  • Page 126: Refrigeration System Diagnostics

    Refrigeration System Refrigeration System Diagnostics General When analyzing the refrigeration system, it is important to understand that different refrigeration component malfunctions may cause very similar symptoms. Many external factors can make good refrigeration components appear bad. These factors can include improper installation, or water system malfunctions such as hot incoming water supply or water loss.

  • Page 127: Before Beginning Service

    Section 7 BEFORE BEGINNING SERVICE Ice machines may experience operational problems only during certain times of the day or night. A machine may function properly while it is being serviced, but malfunctions later. Information provided by the user can help the technician start in the right direction, and may be a determining factor in the final diagnosis.

  • Page 128: Installation/Visual Inspection Checklist

    Float valve outlet contacts float. SAFEGUARDS In addition to standard safety controls, your Manitowoc ice machine features built-in SafeGuards. The ice machine will stop when conditions arise that would cause major component failure. Refer to Section 5 to determine if a SafeGuard has stopped the ice machine.

  • Page 129: Analyzing Discharge Pressure During Freeze Or Harvest Cycle

    Section 7 ANALYZING DISCHARGE PRESSURE DURING FREEZE OR HARVEST CYCLE Procedure 1. Determine the ice machine operating conditions: Air temp. entering condenser Air temp. around ice machine Water temp. entering water reservoir ______ 2. Refer to Cycle Times/24 Hour Ice Production/ Refrigeration Pressure Chart for ice machine being checked.

  • Page 130: Analyzing Suction Pressure

    Refrigeration System ANALYZING SUCTION PRESSURE NOTE: Analyze discharge pressure before analyzing suction pressure. High or low discharge pressure may be causing high or low suction pressure. Suction Pressure High Checklist Possible Cause Improper installation Discharge pressure Improper refrigerant charge Other Suction Pressure Low Checklist Possible Cause Improper installation...

  • Page 131: Equalization Valve

    Section 7 EQUALIZATION VALVE (QF2300) General The equalization valve is an electrically operated valve that closes when energized, and opens when de- energized. Normal Operation The valve is energized (closed) during the freeze cycle and de-energized (open) during the off cycle. The valve equalizes low and high side pressure during the off cycle.

  • Page 132: Failure List

    HEADMASTER CONTROL VALVE Function The headmaster control valve maintains the correct discharge pressure and liquid line temperature. Manitowoc Ice Machine systems require headmaster control valves with special settings. Replace defective headmaster control valves only with “original” Manitowoc replacement parts. FREEZE CYCLE OPERATION...

  • Page 133: Cycle Time/24 Hour Ice Production/Refrigerant Pressure Charts

    Section 7 Cycle Time/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 “Refrigeration System Diagnostics” for the data that must be collected.

  • Page 134: Qc700 Self-Contained Air Cooled

    Refrigeration System QC700 SELF-CONTAINED AIR COOLED NOTE: These characteristics may vary depending on operating conditions. 24 Hour Ice Production Air Temp. Water Temperature °F/°C Entering Condenser 50/10.0 70/21.1 °F/°C 70/ 21.1 80/26.7 90/32.2 100/37.8 110/43.3 Operating Pressures Freeze Cycle Air Temp. Entering Discharge Condenser °F/°C Pressure PSIG...

  • Page 135: Qf800 Self-Contained Air Cooled

    Section 7 QF800 SELF-CONTAINED AIR COOLED NOTE: These characteristics may vary depending on operating conditions. 24 Hour Ice Production Air Temp. Water Temperature °F/°C Entering Condenser 50/10.0 70/21.1 °F/°C 70/21.1 80/26.7 90/32.2 100/37.8 110/43.3 Operating Pressures Freeze Cycle Air Temp. Entering Discharge Condenser °F/°C Pressure PSIG...

  • Page 136: Qf2200/Rfc2085 Remote Air Cooled

    Refrigeration System QF2200/RFC2085 REMOTE AIR COOLED NOTE: These characteristics may vary depending on 24 Hour Ice Production 24 Hour Ice Production Air Temp. Water Temperature °F/°C Entering Condenser 50/10.0 70/21.1 °F/°C 70/21.1 2150 80/26.7 2050 90/32.2 1870 100/37.8 1650 110/43.3 1400 Operating Pressures Freeze Cycle...

  • Page 137: Refrigerant Recovery/Evacuation And Recharging

    4. Refer to Charging Procedures. Remote Air-Cooled Models manufacturer’s recommendations. 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.
  • Page 138 Refrigeration System Important Replace the liquid line drier before evacuating and recharging. Use only a Manitowoc (OEM) liquid line filter drier to prevent voiding the warranty. Connections Manifold gauge sets must utilize low loss fittings to comply with U.S. Government rules and regulations. Make these connections: •...
  • Page 139 Section 7 Self-Contained Model Charging Procedures Important The charge is critical on all Manitowoc ice machines. Use a scale or a charging cylinder to ensure the proper charge is installed. 1. Be sure the toggle switch is in the OFF position.
  • Page 140 Refrigeration System Remote Charging Procedures (QF2200/QF2300) 1. Be sure the 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 quick-connect fitting).

  • Page 141: System Contamination Clean-Up

    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.
  • Page 142 Refrigeration System Mild System Contamination Cleanup Procedure 1. Replace any failed components. 2. If the compressor is good, change the oil. 3. Replace the liquid line drier. NOTE: If the contamination is from moisture, use heat lamps during evacuation. Position them at the compressor, condenser and evaporator prior to evacuation.

  • Page 143: Replacing Pressure Controls Without Removing Refrigerant Charge

    Section 7 9. Follow the normal evacuation procedure, except replace the evacuation step with the following: Important Dry nitrogen is recommended for this procedure. This will prevent CFC release. A. Pull vacuum to 1000 microns. Break the vacuum with dry nitrogen and sweep the system. Pressurize to a minimum of 5 psi.
  • Page 144 Refrigeration System Section 7 SV1406 Using Pinch-Off Tool 7-22 Part No. 80-1214-3 Revised 8/2003...

  • Page 145: Filter-Driers

    Section 7 FILTER-DRIERS Liquid Line Filter Drier The filter-driers used on Manitowoc ice machines are manufactured to Manitowoc specifications. The difference between Manitowoc driers and off-the- shelf driers is in filtration. Manitowoc driers have dirt- retaining filtration, with fiberglass filters on both the inlet and outlet ends.

  • Page 146: Refrigerant Definitions

    Refrigeration System 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 re-use by oil separation and single or multiple passes through devices, such as replaceable core filter-driers, which reduce moisture, acidity and particulate matter.
  • Page 147 Revised 8/2003...
  • Page 148 • Improve Your Service Techniques • Network with Your Peers • 4 1/2 Days of Intensive Training on Manitowoc Ice Machines • Extensive “Hands On” Training on a Variety of Equipment • Breakfast, Lunch and Hotel Room Included with Tuition •...

  • Page 149: Refrigerant Re-Use Policy

    Important Manitowoc Ice, Inc. assumes no responsibility for use of contaminated refrigerant. Damage resulting from the use of contaminated, recovered, or recycled refrigerant is the sole responsibility of the servicing company.
  • Page 150 Refrigeration System Section 7 THIS PAGE INTENTIONALLY LEFT BLANK 7-26 Part No. 80-1214-3 Revised 8/2003...

This manual is also suitable for:

Flake/chiplet qf2300Flake/chiplet qf0400Flake/chiplet qf0800Qf2200

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