Manitowoc QR0320A Service Manual
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Manitowoc QR0320A Service Manual

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ICE MACHINES
Q-Model
Service Manual
Service Manual
Service Manual
C
2004 Manitowoc Ice, Inc.
80-1597-3
6/04

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Summary of Contents for Manitowoc QR0320A

  • Page 1 ICE MACHINES Q-Model Service Manual Service Manual Service Manual 2004 Manitowoc Ice, Inc. 80-1597-3 6/04...
  • Page 2 Safety Notices Procedural Notices As you work on a Q-Series Ice Machine, be sure to pay As you work on a Q-Series Ice Machine, be sure to read close attention to the safety notices in this manual. the procedural notices in this manual. These notices Disregarding the notices may lead to serious injury and/ supply helpful information which may assist you as you or damage to the ice machine.
  • Page 4 • 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 5: Table Of Contents

    Table of Contents Section 1 General Information Model Numbers ..........How to Read a Model Number .
  • Page 6 Quick Connect Fittings ......... 2-17 Non-Manitowoc Multi-Circuit Condenser Sizing Chart ....2-18 Installation Check List .
  • Page 7 Table of Contents (continued) AlphaSan“ ........... Cleaning Procedure .
  • Page 8 Table of Contents (continued) Wiring Diagrams ..........6-17 Wiring Diagram Legend .
  • Page 9 Table of Contents (continued) Section 7 Refrigeration System Sequence of Operation ..........Self-Contained Air or Water -Cooled Models .
  • Page 10 Table of Contents (continued) Refrigerant Recovery/Evacuation and Recharging ..... 7-46 Normal Self-Contained Model Procedures ......7-46 Normal Remote Model Procedures .

  • Page 11: Model Numbers

    1 R EG U LAR W ATER - COOLED 9 R EMO TE 2 DICE A I R - COOLED A I R - COOLED QR0320A QR0321W 3 DICE W ATER - COOLED 4 H A LF- DICE A I R - COOLED...

  • Page 12: Model/Serial Number Location

    The model and serial number are listed on the MODEL/ SERIAL NUMBER DECAL affixed to the ice machine, These numbers are required when requesting remote condenser and storage bin. information from your local Manitowoc distributor, or Manitowoc Ice, Inc. SV1600 Figure 1-1. Model/Serial Number Location...

  • Page 13: Warranty Coverage

    PARTS charges not listed on the payment schedule. 1. Manitowoc warrants the ice machine against defects Additional labor charges resulting from the in materials and workmanship, under normal use inaccessibility of equipment are also excluded.
  • Page 14 General Information Section 1 THIS PAGE INTENTIONALLY LEFT BLANK Part No. 80-1100-3...

  • Page 15: General

    Section 2 Installation Instructions General Important Refer to Installation Manual for complete installation Failure to follow these installation guidelines may guidelines. affect warranty coverage. Ice Machine Dimensions Q320/Q370/Q420 ICE MACHINES WATER COOLED AIR COOLED SV1602 SV1611 Ice Machine Dimension H Q320 21.5 in (54.6 cm) Q370...

  • Page 16: Q200 – Q1000 Ice Machines

    Installation Instructions Section 2 Q200 – Q1000 ICE MACHINES Q1300/Q1600/Q1800 ICE MACHINES WATER-COOLED SELF CONTAINED AIR-COOLED SV1612 SV1628 AIR-COOLED SELF CONTAINED WATER-COOLED SV1613 SV1627 Ice Machine Dimension H Q1300/Q1600 29.5 in (74.9 cm) Ice Machine Dimension H Q1800 29.5 in (74.9 cm) Q200 –...

  • Page 17: Q1300/Q1600/Q1800 Ice Machines (Cont.)

    Section 2 Installation Instructions Q1300/Q1600/Q1800 ICE MACHINES (CONT.) Ice Storage Bin Dimensions S170/S400/S570 ICE STORAGE BINS REMOTE AIR-COOLED SV1629 SV1609 Bin Model Dimension A Dimension B S170 29.5 in (74.9 cm) 19.1 in (48.5 cm) S400 34.0 in (86.3 cm) 32.0 in (81.3 cm) S570 34.0 in (86.3 cm)

  • Page 18: S970 Ice Storage Bins

    JC0495/JC0895/JC1095/JC1395 SV1610 SV1297 JC1895 Warning All Manitowoc ice machines require the ice storage system (bin, dispenser, etc.) to incorporate an ice deflector. The Q1300, Q1600 and Q1800 series ice machines require adding Manitowoc Ice Deflector Kit K00139 when installing with non-Manitowoc ice storage systems.

  • Page 19: Location Of Ice Machine

    Section 2 Installation Instructions Location of Ice Machine Stacking Two Ice Machines on a Single Storage Bin The location selected for the ice machine must meet the following criteria. If any of these criteria are not met, A stacking kit is required for stacking two ice machines. select another location.

  • Page 20: Leveling The Ice Storage Bin

    Installation Instructions Section 2 Leveling the Ice Storage Bin Air-Cooled Baffle 1. Screw the leveling legs onto the bottom of the bin. The air-cooled baffle prevents condenser air from recirculating. To install: 2. Screw the foot of each leg in as far as possible. 1.

  • Page 21: Electrical Service

    Section 2 Installation Instructions Electrical Service FUSE/CIRCUIT BREAKER A separate fuse/circuit breaker must be provided for GENERAL each ice machine. Circuit breakers must be H.A.C.R. rated (does not apply in Canada). Warning MINIMUM CIRCUIT AMPACITY All wiring must conform to local, state and national codes.

  • Page 22: Installation Instructions

    Installation Instructions Section 2 Table 2-1. Q320/370/420 Ice Machines Air-Cooled Water Cooled Voltage Ice Machine Phase Maximum Fuse/ Minimum Maximum Fuse/ Minimum Cycle Circuit Breaker Circuit Amps Circuit Breaker Circuit Amps 115/1/60 11.2 10.5 Q320 208-230/1/60 230/1/50 115/1/60 12.9 12.2 Q370 208-230/1/60 230/1/50...

  • Page 23: Self-Contained Electrical Wiring Connections

    Section 2 Installation Instructions Self-Contained Electrical Wiring Connections SELF CONTAINED ICE MACHINE Warning 208-230/3/60 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 24: Remote Electrical Wiring Connections

    Installation Instructions Section 2 Remote Electrical Wiring Connections REMOTE ICE MACHINE WITH SINGLE CIRCUIT MODEL CONDENSER 208-230/3/60 OR 380-415/3/50 Warning These diagrams are not intended to show proper wire routing, wire sizing, disconnects, etc., only the SINGLE CIRCUIT correct wire connections. NOTE: FAN REMOTE MOTOR IS...

  • Page 25: Water Supply And Drain Requirements

    The floor drain must be large enough to Important accommodate drainage from all drains. If you are installing a Manitowoc water filter system, refer to the Installation Instructions supplied with the • Run separate bin and ice machine drain lines.

  • Page 26: Water Supply And Drain Line Sizing/Connections

    Installation Instructions Section 2 WATER SUPPLY AND DRAIN LINE SIZING/CONNECTIONS ! Caution Plumbing must conform to state and local codes. Tubing Size Up to Ice Location Water Temperature Water Pressure Ice Machine Fitting Machine Fitting 33°F (0.6°C) Min. 20 psi (137.9 kPA) Min. 3/8"...

  • Page 27: Remote Condenser/Line Set Installation

    Section 2 Installation Instructions Remote Condenser/Line Set Installation Additional refrigerant may be required for installations using line sets between 50' and 100' (15.25-30.5 m) long. If additional refrigerant is required, an additional Remote Single label located next to the Model/Serial Numbers decal Ice Machine Circuit Line Set*...

  • Page 28: General

    Manitowoc Ice, Inc., unless 3. Required - Keep outdoor refrigerant line runs as specifically approved in writing by Manitowoc Ice, short as possible. Inc. DOWNWARD HORIZONTAL SPIRAL SV1204 Figure 2-5. Routing Line Sets 2-14 Part No.

  • Page 29: Calculating Remote Condenser Installation Distances

    Section 2 Installation Instructions CALCULATING REMOTE CONDENSER Make the following calculations to make sure the line set INSTALLATION DISTANCES layout is within specifications. Line Set Length 1. Insert the measured rise into the formula below. Multiply by 1.7 to get the calculated rise. The maximum length is 100' (30.5 m).

  • Page 30: Lengthening Or Reducing Line Set Lengths

    Installation Instructions Section 2 LENGTHENING OR REDUCING LINE SET LENGTHS REMOTE RECEIVER SERVICE VALVE In most cases, by routing the line set properly, The receiver service valve is closed during shipment. shortening will not be necessary. When shortening or Open the valve prior to starting the ice machine. lengthening is required, do so before connecting the line 1.

  • Page 31: Remote Ice Machine Usage With Non-Manitowoc Multi-Circuit Condensers

    The multi-circuit condenser internal volume must not be If the design of the condenser meets the specifications, less than or exceed that used by Manitowoc (see chart Manitowoc’s only approval is for full warranty coverage on Page 2-18). Do not exceed internal volume and try...

  • Page 32: Non-Manitowoc Multi-Circuit Condenser Sizing Chart

    Installation Instructions Section 2 NON-MANITOWOC MULTI-CIRCUIT CONDENSER SIZING CHART Internal Quick Connect Stubs- Head Refrigerant Heat of Rejection Condenser Male Ends Design Pressure Volume (cu ft) Machine Pressure Control Model Average Peak Valve Type Charge Discharge Liquid Btu/hr Btu/hr Q450 R-404A 6 lbs.

  • Page 33: Installation Check List

    Have all of the electrical and water connections regarding maintenance and the use of been made? Manitowoc Cleaner and Sanitizer? Has the supply voltage been tested and checked Has the owner/operator completed the warranty against the rating on the nameplate?
  • Page 34 Installation Instructions Section 2 THIS PAGE INTENTIONALLY LEFT BLANK 2-20 Part No. 80-1100-3...

  • Page 35: Maintenance

    Section 3 Maintenance Component Identification AIR CONDENSER HARVEST VALVE CONDENSER WATER REGULATING VALVE REMOTE COUPLINGS WATER DUMP VALVE COMPRESSOR WATER WATER COOLED DRAIN HOSE SV1604G CONDENSER MODEL DISTRIBUTION ICE THICKNESS HIGH PRESSURE CUTOUT/ TUBE PROBE MANUAL RESET EVAPORATOR (When applicable) ICE/OFF/CLEAN SWITCH WATER...

  • Page 36: Operational Checks

    The ice thickness probe is factory-set to maintain the ice GENERAL bridge thickness at 1/8" (3.2 mm). Manitowoc ice machines are factory-operated and NOTE: Make sure the water curtain is in place when adjusted before shipment. Normally, new installations do performing this check.

  • Page 37: Harvest Sequence Water Purge

    Section 3 Maintenance HARVEST SEQUENCE WATER PURGE Cleaning the Condenser The harvest sequence water purge adjustment may be used when the ice machine is hooked up to special Warning water systems, such as a de-ionized water treatment Disconnect electric power to the ice machine and system.

  • Page 38: Water-Cooled Condenser And Water Regulating Valve

    Maintenance Section 3 3. Shine a flashlight through the condenser to check WATER-COOLED CONDENSER AND WATER REGULATING VALVE for dirt between the fins. If dirt remains: Symptoms of restrictions in the condenser water circuit A. Blow compressed air through the condenser fins include: from the inside.

  • Page 39: Interior Cleaning And Sanitizing

    MANITOWOC’S PATENTED CLEANING OR SANITIZING TECHNOLOGY GENERAL Manitowoc Ice Machines include technology that allows Clean and sanitize the ice machine every six months for the initiation and completion of a cleaning or sanitizing efficient operation. If the ice machine requires more cycle at the flip of a switch.

  • Page 40: Cleaning Procedure

    Step 3 Wait about one minute or until water starts to flow over the evaporator. Important Step 4 Add the proper amount of Manitowoc Ice After the toggle switch is moved to the ICE position, Machine Cleaner to the water trough.

  • Page 41: Sanitizing Procedure

    Section 3 Maintenance SANITIZING PROCEDURE Use sanitizer to remove algae or slime. Do not use it to Step 4 Use the sanitizing solution and a sponge or remove lime scale or other mineral deposits. cloth to sanitize (wipe) all parts and interior surfaces of the ice machine.

  • Page 42: Automatic Cleaning System (Aucs")

    Maintenance Section 3  AUTOMATIC CLEANING SYSTEM (AuCS This accessory monitors ice making cycles and initiates Manual Start Operation cleaning (or sanitizing) procedures automatically. The Step 1 Set the toggle switch to the OFF position after  AuCS Accessory can be set to automatically clean or ice falls from the evaporator at the end of a Harvest sanitize the ice machine every 2, 4, or 12 weeks.

  • Page 43: Removal Of Parts For Cleaning/Sanitizing

    Section 3 Maintenance REMOVAL OF PARTS FOR CLEANING/SANITIZING 4. Use a soft-bristle brush or sponge (NOT a wire brush) to carefully clean the parts. 1. Turn off the water supply to the ice machine at the water service valve. ! Caution Do not mix Cleaner and Sanitizer solutions together.
  • Page 44 Maintenance 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 dump valve’s clear plastic outlet drain hose for leakage.
  • Page 45 3. Loosen the screws securing the pump mounting Ice Thickness Probe Cleaning bracket to the bulkhead. 1. Mix a solution of Manitowoc ice machine cleaner 4. Lift the pump and bracket assembly off the screws. and water (2 ounces of cleaner to 16 ounces of water) in a container.
  • Page 46 Maintenance Section 3 Water Level Probe Follow the procedure below to remove the water inlet valve. 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 electric power to the ice machine at the electric service switch box and turn off the water...
  • Page 47 Section 3 Maintenance Water Distribution Tube Water Curtain 1. Disconnect the water hose from the distribution 1. Gently flex the curtain in the center and remove it tube. from the right side. 1. LIFT UP 2. SLIDE BACK 3. SLIDE TO RIGHT DISTRIBUTION TUBE THUMBSCREW...

  • Page 48: Water Treatment/Filtration

    Consult your local distributor for information on 6. Lubricate the O-ring with petroleum jelly.   Manitowoc’s full line of NSF -certified Tri-Liminator 7. Press the O-ring into the housing groove. filtration systems. 8. Insert a new filter cartridge into the housing. Make FILTER REPLACEMENT PROCEDURE sure it slips down over the housing standpipe.

  • Page 49: Removal From Service/Winterization

    Section 3 Maintenance Removal from Service/Winterization WATER-COOLED ICE MACHINES 1. Perform steps 1-6 under “Self-Contained Air-Cooled GENERAL Ice Machines.” Special precautions must be taken if the ice machine is 2. Disconnect the incoming water and drain lines from to be removed from service for an extended period of the water-cooled condenser.
  • Page 50 Maintenance Section 3 THIS PAGE INTENTIONALLY LEFT BLANK 3-16 Part No. 80-1100-3...

  • Page 51: Self-Contained Air- And Water-Cooled

    Section 4 Ice Machine Sequence of Operation Self-Contained Air- and Water-Cooled Q200/Q280/Q320/Q370/Q420/Q450/Q600/Q800/Q1000/Q1300/Q1600/Q1800 INITIAL START-UP OR START-UP AFTER FREEZE SEQUENCE AUTOMATIC SHUT-OFF 3. Prechill 1. Water Purge The compressor is on for 30 seconds prior to water flow, Before the compressor starts, the water pump and water to prechill the evaporator.

  • Page 52: Harvest Sequence

    Ice Machine Sequence of Operation Section 4 HARVEST SEQUENCE AUTOMATIC SHUT-OFF 5. Water Purge 7. Automatic Shut-Off The water pump continues to run, and the water dump When the storage bin is full at the end of a harvest valve energizes for 45 seconds to purge the water in the sequence, the sheet of cubes fails to clear the water sump trough.

  • Page 53: Remote

    Section 4 Ice Machine Sequence of Operation Remote Q450/Q600/Q800/Q1000/Q1300/Q1600/Q1800 INITIAL START-UP OR START-UP AFTER FREEZE SEQUENCE AUTOMATIC SHUT-OFF 3. Prechill 1. Water Purge The compressor is on for 30 seconds prior to water flow, Before the compressor starts, the water pump and water to prechill the evaporator.

  • Page 54: Harvest Sequence

    Ice Machine Sequence of Operation Section 4 HARVEST SEQUENCE AUTOMATIC SHUT-OFF 5. Water Purge 7. Automatic Shut-Off The water pump continues to run, and the water dump When the storage bin is full at the end of a harvest valve energizes for 45 seconds to purge the water in the sequence, the sheet of cubes fails to clear the water sump trough.

  • Page 55: Initial Start-Up Or Start-Up After Automatic Shut-Off

    Section 5 Water System Ice Making Sequence of Operation NOTE: The sequence of operation is the same for self- 3. The water pump starts after the 30-second pre-chill. contained and remote models. An even flow of water is directed across the evaporator and into each cube cell.

  • Page 56: Harvest Cycle

    Water System Ice Making Sequence of Operation Section 5 HARVEST CYCLE AUTOMATIC SHUT-OFF 4. The water pump and water dump solenoid are There is no water flow during an automatic shut-off. energized for 45 seconds to purge the water from the water trough.

  • Page 57: Energized Parts Charts

    Section 6 Electrical System Energized Parts Charts SELF-CONTAINED AIR- AND WATER-COOLED MODELS Control Board Relays Contactor Ice Making Length Sequence Of Water Of Time Water Water Fill Harvest Contactor Com- Condenser Operation Dump Pump Valve Valve(s) Coil pressor Fan Motor Valve START-UP 45 Seconds...

  • Page 58: Remote Models

    Electrical System Section 6 REMOTE MODELS Control Board Relays Contactor Ice Making Harvest Length Contactor Sequence Of Valve(s) Water Of Time Coil Water Water Fill Com- Condenser Operation Dump Pump Valve pressor Fan Motor Liquid Valve Line Solenoid Solenoid START-UP 45 Seconds 1.

  • Page 59: Initial Start-Up Or Start-Up After Automatic Shut-Off

    Section 6 Electrical System Wiring Diagram Sequence of SEE SERIAL PLATE FOR VOLTAGE L2 (N) Operation (22) (21) (20) SELF-CONTAINED MODELS (55) TB32 TB35 (61) WATER VALVE (60) Initial Start-Up or Start-Up After HIGH PRES CUTOUT (77) Automatic Shut-Off (80) HARVEST SOLENOID 1.
  • Page 60 Electrical System Section 6 2. REFRIGERATION SYSTEM SEE SERIAL PLATE FOR VOLTAGE L2 (N) START-UP The compressor starts after the 45- (21) (22) (20) (55) TB32 (61) TB35 WATER second water purge, and it remains VALVE (60) on throughout the Freeze and HIGH PRES CUTOUT (77)
  • Page 61 Section 6 Electrical System Freeze Sequence SEE SERIAL PLATE FOR VOLTAGE L2 (N) 3. PRE-CHILL (21) (22) (20) To pre-chill the evaporator, the (55) TB32 (61) TB35 WATER compressor runs for 30 seconds prior VALVE (60) HIGH PRES to water flow. CUTOUT (77) (80)
  • Page 62 Electrical System Section 6 4. FREEZE SEE SERIAL PLATE FOR VOLTAGE L2 (N) The water pump starts after the 30- second pre-chill. An even flow of (20) (22) (21) (55) TB32 (61) TB35 WATER water is directed across the VALVE (60) HIGH PRES evaporator and into each cube cell,...
  • Page 63 Section 6 Electrical System Harvest Sequence SEE SERIAL PLATE FOR VOLTAGE L2 (N) 5. WATER PURGE (20) (22) (21) The water pump continues to run, (55) TB32 (61) TB35 WATER VALVE and the water dump valve energizes (60) HIGH PRES CUTOUT (77) for 45 seconds to purge the water in...
  • Page 64 Electrical System Section 6 6. HARVEST SEE SERIAL PLATE FOR VOLTAGE L2 (N) The harvest valve(s) remains open, allowing refrigerant gas to warm the (22) (20) (21) (55) TB32 (61) TB35 WATER evaporator. This causes the cubes to VALVE (60) HIGH PRES slide, as a sheet, off the evaporator CUTOUT...
  • Page 65 Section 6 Electrical System Automatic Shut-Off 7. AUTOMATIC SHUT-OFF SEE SERIAL PLATE FOR VOLTAGE L2 (N) If the storage bin is full at the end of a harvest cycle, the sheet of cubes fails (21) (22) (20) (55) TB32 TB35 (61) WATER to clear the water curtain and holds it...
  • Page 66 Electrical System Section 6 REMOTE MODELS SEE SERIAL PLATE FOR VOLTAGE L2 (N) (21) (22) (20) Initial Start-Up Or Start-Up After WATER VALVE Automatic Shut-Off TB32 (55) SOLENOID (61) TB35 1. WATER PURGE (60) (78) (79) HIGH PRES CUTOUT (77) Before the compressor starts, the (80) HARVEST...
  • Page 67 Section 6 Electrical System 2. REFRIGERATION SYSTEM SEE SERIAL PLATE FOR VOLTAGE L2 (N) START-UP (20) (21) (22) WATER VALVE The compressor, remote condenser TB32 (55) SOLENOID (61) TB35 fan motor and liquid line solenoid (60) (78) (79) HIGH PRES valve energize after the 45-second CUTOUT (77)
  • Page 68 Electrical System Section 6 Freeze Sequence SEE SERIAL PLATE FOR VOLTAGE L2 (N) (20) (21) (22) 3. PRE-CHILL WATER VALVE To pre-chill the evaporator, the TB32 (55) SOLENOID (61) TB35 (60) compressor runs for 30 seconds prior (78) (79) HIGH PRES CUTOUT (77) to water flow.
  • Page 69 Section 6 Electrical System 4. FREEZE SEE SERIAL PLATE FOR VOLTAGE L2 (N) (20) (21) (22) The water pump starts after the 30- WATER VALVE second pre-chill. An even flow of TB32 (55) SOLENOID (61) TB35 water is directed across the (60) (78) (79)
  • Page 70 Electrical System Section 6 Harvest Sequence SEE SERIAL PLATE FOR VOLTAGE L2 (N) (20) (21) (22) 5. WATER PURGE WATER VALVE The water pump continues to run, TB32 (55) SOLENOID (61) TB35 (60) and the water dump valve energizes (78) (79) HIGH PRES CUTOUT...
  • Page 71 Section 6 Electrical System 6. HARVEST SEE SERIAL PLATE FOR VOLTAGE L2 (N) (21) (22) (20) The harvest valve(s) and HPR WATER VALVE solenoid valve remain open, allowing TB32 (55) SOLENOID (61) TB35 refrigerant gas to warm the (60) (78) (79) HIGH PRES evaporator.
  • Page 72 Electrical System Section 6 Automatic Shut-Off SEE SERIAL PLATE FOR VOLTAGE L2 (N) (21) (22) (20) 7. AUTOMATIC SHUT-OFF WATER VALVE If the storage bin is full at the end of a TB32 (55) SOLENOID (61) TB35 (60) harvest cycle, the sheet of cubes fails (78) (79) HIGH PRES...

  • Page 73: Wiring Diagrams

    Section 6 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 74: Q200/Q280/Q320 - Self Contained - 1 Phase With Terminal Board

    Electrical System Section 6 Q200/Q280/Q320 - SELF CONTAINED - 1 PHASE WITH TERMINAL BOARD CAUTION: DISCONNECT POWER BEFORE WORKING SEE SERIAL PLATE FOR VOLTAGE ON ELECTRICAL CIRCUITRY. L2 (N) DIAGRAM SHOWN DURING FREEZE CYCLE (20) (21) (22) (61) WATER VALVE (60) (55) TB32...

  • Page 75: Q280/Q370 - Self Contained - 1 Phase Without Terminal Board

    Section 6 Electrical System Q280/Q370 - SELF CONTAINED - 1 PHASE WITHOUT TERMINAL BOARD L2 (N) SEE SERIAL PLATE FOR VOLTAGE (20) CAUTION: DISCONNECT POWER BEFORE WORKING (21) (22) ON ELECTRICAL CIRCUITRY. WATER (61) DIAGRAM SHOWN DURING FREEZE CYCLE VALVE (60) (89) (55)

  • Page 76: Q320 - Self Contained - 1 Phase Without Terminal Board

    Electrical System Section 6 Q320 - SELF CONTAINED - 1 PHASE WITHOUT TERMINAL BOARD CAUTION: DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY. SEE SERIAL PLATE FOR VOLTAGE DIAGRAM SHOWN DURING FREEZE CYCLE L2 (N) (22) (20) (21) WATER VALVE (61) (60) (55) (89)

  • Page 77: Q420/Q450/Q600/Q800/Q1000 - Self Contained

    Section 6 Electrical System Q420/Q450/Q600/Q800/Q1000 - SELF CONTAINED - 1 PHASE WITH TERMINAL BOARD CAUTION: DISCONNECT POWER BEFORE WORKING SEE SERIAL PLATE FOR VOLTAGE ON ELECTRICAL CIRCUITRY. DIAGRAM SHOWN DURING FREEZE CYCLE L2 (N) (21) (22) (20) (55) TB32 (61) TB35 WATER VALVE...

  • Page 78: Q420/Q450/Q600/Q800/Q1000 - Self Contained

    Electrical System Section 6 Q420/Q450/Q600/Q800/Q1000 - SELF CONTAINED - 1 PHASE WITHOUT TERMINAL BOARD CAUTION: DISCONNECT POWER BEFORE WORKING L2 (N) ON ELECTRICAL CIRCUITRY. SEE SERIAL PLATE FOR VOLTAGE DIAGRAM SHOWN DURING FREEZE CYCLE (22) (20) (21) WATER (61) (55) VALVE (89) HIGH PRES...

  • Page 79: Q800/Q1000 - Self Contained - 3 Phase With Terminal Board

    Section 6 Electrical System Q800/Q1000 - SELF CONTAINED - 3 PHASE WITH TERMINAL BOARD SEE SERIAL PLATE FOR VOLTAGE CAUTION: DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY. DIAGRAM SHOWN DURING FREEZE CYCLE (21) (22) (20) TB32 WATER TB35 (61) VALVE (60) HIGH PRES CUTOUT...

  • Page 80: Q800/Q1000 - Self Contained - 3 Phase Without Terminal Board

    Electrical System Section 6 Q800/Q1000 - SELF CONTAINED - 3 PHASE WITHOUT TERMINAL BOARD CAUTION: DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY. DIAGRAM SHOWN DURING FREEZE CYCLE SEE SERIAL PLATE FOR VOLTAGE (22) (20) (21) WATER (89) (55) VALVE (61) HIGH PRES CUTOUT (60)

  • Page 81: Q1300/Q1800 - Self Contained - 1 Phase With Terminal Board

    Section 6 Electrical System Q1300/Q1800 - SELF CONTAINED - 1 PHASE WITH TERMINAL BOARD SEE SERIAL PLATE FOR VOLTAGE CAUTION: DISCONNECT POWER BEFORE WORKING L2(N) ON ELECTRICAL CIRCUITRY. WATER DIAGRAM SHOWN DURING FREEZE CYCLE VALVE (20) (21) (22) (55) TB32 RH HARVEST TB35 SOLENOID...

  • Page 82: Q1300/Q1600/Q1800 - Self Contained - 1 Phase Without Terminal Board

    Electrical System Section 6 Q1300/Q1600/Q1800 - SELF CONTAINED - 1 PHASE WITHOUT TERMINAL BOARD CAUTION: DISCONNECT POWER BEFORE WORKING SEE SERIAL PLATE FOR VOLTAGE ON ELECTRICAL CIRCUITRY. DIAGRAM SHOWN DURING FREEZE CYCLE L2 (N) (20) (21) (22) WATER VALVE (55) (89) (61) HIGH PRES...

  • Page 83: Q1300/Q1800 - Self Contained - 3 Phase With Terminal Board

    Section 6 Electrical System Q1300/Q1800 - SELF CONTAINED - 3 PHASE WITH TERMINAL BOARD SEE SERIAL PLATE FOR VOLTAGE CAUTION: DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY. WATER DIAGRAM SHOWN DURING FREEZE CYCLE (21) VALVE (20) (22) TB32 RH HARVEST TB35 SOLENOID (61)

  • Page 84: Q1300/Q1600/Q1800 - Self Contained - 3 Phase Without Terminal Board

    Electrical System Section 6 Q1300/Q1600/Q1800 - SELF CONTAINED - 3 PHASE WITHOUT TERMINAL BOARD SEE SERIAL PLATE FOR VOLTAGE CAUTION: DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY. DIAGRAM SHOWN DURING FREEZE CYCLE (22) (20) (21) WATER VALVE (89) (55) RH HARVEST SOLENOID (61) (87)

  • Page 85: Q450/Q600/Q800/Q1000 - Remote - 1 Phase With Terminal Board

    Section 6 Electrical System Q450/Q600/Q800/Q1000 - REMOTE - 1 PHASE WITH TERMINAL BOARD CAUTION: DISCONNECT POWER BEFORE WORKING SEE SERIAL PLATE FOR VOLTAGE ON ELECTRICAL CIRCUITRY. DIAGRAM SHOWN DURING FREEZE CYCLE L2 (N) (21) (22) (20) WATER VALVE TB32 (55) SOLENOID (61) TB35...

  • Page 86: Q450/Q600/Q800/Q1000 - Remote - 1 Phase Without Terminal Board

    Electrical System Section 6 Q450/Q600/Q800/Q1000 - REMOTE - 1 PHASE WITHOUT TERMINAL BOARD CAUTION: DISCONNECT POWER BEFORE WORKING SEE SERIAL PLATE FOR VOLTAGE ON ELECTRICAL CIRCUITRY. DIAGRAM SHOWN DURING FREEZE CYCLE L2 (N) (20) (21) (22) WATER VALVE SOLENOID (89) (55) (61) (78)

  • Page 87: Q800/Q1000 -Remote - 3 Phase With Terminal Board

    Section 6 Electrical System Q800/Q1000 -REMOTE - 3 PHASE WITH TERMINAL BOARD SEE SERIAL PLATE FOR VOLTAGE CAUTION: DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY. (21) (22) DIAGRAM SHOWN DURING FREEZE CYCLE WATER (20) VALVE SOLENOID TB32 (61) TB35 (60) (78) (79) HIGH PRES...

  • Page 88: Q800/Q1000 -Remote - 3 Phase Without Terminal Board

    Electrical System Section 6 Q800/Q1000 -REMOTE - 3 PHASE WITHOUT TERMINAL BOARD SEE SERIAL PLATE FOR VOLTAGE CAUTION: DISCONNECT POWER BEFORE WORKING (21) ON ELECTRICAL CIRCUITRY. (22) DIAGRAM SHOWN DURING FREEZE CYCLE WATER (20) VALVE (55) (89) (61) SOLENOID (79) (60) (78) HIGH PRES...

  • Page 89: Q1300/Q1800 - Remote - 1 Phase With Terminal Board

    Section 6 Electrical System Q1300/Q1800 - REMOTE - 1 PHASE WITH TERMINAL BOARD SEE SERIAL PLATE FOR VOLTAGE CAUTION: DISCONNECT POWER BEFORE WORKING ON ELECTRICAL CIRCUITRY. WATER L2 (N) DIAGRAM SHOWN DURING FREEZE CYCLE VALVE (21) (22) (20) SOLENOID (78) (79) RH HARVEST (55)

  • Page 90: Q1300/Q1600/Q1800 - Remote - 1 Phase Without Terminal Board

    Electrical System Section 6 Q1300/Q1600/Q1800 - REMOTE - 1 Phase Without Terminal Board CAUTION: DISCONNECT POWER BEFORE WORKING SEE SERIAL PLATE FOR VOLTAGE ON ELECTRICAL CIRCUITRY. L2 (N) DIAGRAM SHOWN DURING FREEZE CYCLE (20) (21) (22) WATER VALVE SOLENOID (78) (79) RH HARVEST SOLENOID...

  • Page 91: Q1300/Q1800 - Remote - 3 Phase With Terminal Board

    Section 6 Electrical System Q1300/Q1800 - REMOTE - 3 PHASE WITH TERMINAL BOARD CAUTION: DISCONNECT POWER BEFORE WORKING WATER ON ELECTRICAL CIRCUITRY. VALVE (22) (21) DIAGRAM SHOWN DURING FREEZE CYCLE SEE SERIAL PLATE FOR VOLTAGE (20) N - 50HZ ONLY SOLENOID (79) (78)

  • Page 92: Q1300/Q1600/Q1800 - Remote - 3 Phase Without Terminal Board

    Electrical System Section 6 Q1300/Q1600/Q1800 - REMOTE - 3 PHASE WITHOUT TERMINAL BOARD CAUTION: DISCONNECT POWER BEFORE WORKING (21) (22) ON ELECTRICAL CIRCUITRY. WATER SEE SERIAL PLATE FOR VOLTAGE DIAGRAM SHOWN DURING FREEZE CYCLE VALVE (20) N - 50 HZ ONLY SOLENOID (79)
  • Page 93 Section 6 Electrical System THIS PAGE INTENTIONALLY LEFT BLANK 6-37 Part No. 80-1100-3...

  • Page 94: Component Specifications And Diagnostics

    Electrical System Section 6 Component Specifications and Diagnostics MAIN FUSE BIN SWITCH Function Function The control board fuse stops ice machine operation if Movement of the water curtain controls bin switch electrical components fail causing high amp draw. operation. The bin switch has two main functions: Specifications 1.
  • Page 95 Section 6 Electrical System Check Procedure Water Curtain Removal Notes 1. Set the toggle switch to OFF. The water curtain must be on (bin switch closed) to start ice making. While a freeze cycle is in progress, the water 2. Watch the bin switch light on the control board. curtain can be removed and installed at any time without 3.

  • Page 96: Compressor Electrical Diagnostics

    Electrical System Section 6 COMPRESSOR ELECTRICAL DIAGNOSTICS Determine if the Compressor is Seized The compressor will not start or will trip repeatedly on Check the amp draw while the compressor is trying to overload. start. Check Resistance (Ohm) Values COMPRESSOR DRAWING LOCKED ROTOR NOTE: Compressor windings can have very low ohm The two likely causes of this are: values.

  • Page 97: Ptcr Diagnostics

    Section 6 Electrical System PTCR DIAGNOSTICS Compressor Start Sequence What is a PTCR? PTCR’s provide additional starting torque by increasing the current in the auxiliary (start) winding during starting. A PTCR (or Positive Temperature Coefficient Resistor) is The PTCR is wired across the run capacitor (in series made from high-purity, semi-conducting ceramics.
  • Page 98 Electrical System Section 6 Q-Model Automatic Shut-Off and Restart Troubleshooting PTCR’s When the storage bin is full at the end of a harvest cycle, WHY A GOOD PTCR MAY FAIL the sheet of cubes fails to clear the water curtain and will TO START THE COMPRESSOR hold it open.
  • Page 99 Q280 low. Q320 8505003 305C20 22-50 Ohms Manitowoc ice machines are rated at ±10% of Q420 nameplate voltage at compressor start-up. (Ex: An Q450 ice machine rated at 208-230 should have a Q600 compressor start-up voltage between 187 and 253...

  • Page 100: Ice/Off/Clean Toggle Switch

    Electrical System Section 6 ICE/OFF/CLEAN TOGGLE SWITCH CONTROL BOARD RELAYS Function Function The switch is used to place the ice machine in ICE, OFF The control board relays energize and de-energize or CLEAN mode of operation. system components. Specifications Specifications Double-pole, double-throw switch.

  • Page 101: Electronic Control Board

    Section 6 Electrical System ELECTRONIC CONTROL BOARD AC LINE VOLTAGE ELECTRICAL PLUG (NUMBERS MARKED ON WIRES) CLEAN LIGHT YELLOW WATER LEVEL PROBE LIGHT GREEN MAIN FUSE (7A) BIN SWITCH LIGHT GREEN AUTOMATIC CLEANING HARVEST LIGHT/ SYSTEM (AuCS) SAFETY LIMIT ACCESSORY PLUG CODE LIGHT ICE THICKNESS PROBE (3/16''...
  • Page 102 Electrical System Section 6 General Inputs Q-Model control boards use a dual voltage transformer. The control board, along with inputs, controls all This means only one control board is needed for both electrical components, including the ice machine 115V and 208-230V use. sequence of operation.

  • Page 103: Ice Thickness Probe (Harvest Initiation)

    Ice Thickness Probe Cleaning The ice machine control system incorporates a freeze 1. Mix a solution of Manitowoc ice machine cleaner time lock-in feature. This prevents the ice machine from and water (2 ounces of cleaner to 16 ounces of short cycling in and out of harvest.

  • Page 104: Diagnosing Ice Thickness Control Circuitry

    Electrical System Section 6 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.
  • Page 105 Section 6 Electrical System Ice Machine Cycles Into Harvest Before Water Contact With The Ice Thickness 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, then monitor the harvest light. Step 2 Disconnect the ice thickness probe from the control board at terminal 1C.

  • Page 106: Water Level Control Circuitry

    Electrical System Section 6 Water Level Control Circuitry FREEZE CYCLE CIRCUITRY Manitowoc’s electronic sensing circuit does not rely on WATER LEVEL PROBE LIGHT float switches or timers to maintain consistent water The water level probe circuit can be monitored by level control.

  • Page 107: Diagnosing Freeze Cycle Potable Water Level Control Circuitry

    Section 6 Electrical System DIAGNOSING FREEZE CYCLE POTABLE WATER Step 2 Wait until the freeze cycle starts LEVEL CONTROL CIRCUITRY (approximately 45 seconds, the freeze cycle starts when the compressor energizes) then connect a jumper from Problem: Water Trough Overfilling During The the water level probe to any cabinet ground.
  • Page 108 Electrical System Section 6 Problem: Water Trough Overfilling During The Remember if you are past 6 minutes from starting, the Freeze Cycle (continued) ice machine will go into a freeze cycle water inlet valve safety shut-off mode, and you will be unable to complete Step 3 Allow ice machine to run.
  • Page 109 Section 6 Electrical System Problem: Water Will Not Run Into The Sump Trough Step 2 Wait until the freeze cycle starts (approximately During The Freeze Cycle 45 seconds, the freeze cycle starts when the compressor energizes), and then refer to chart. 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.

  • Page 110: Diagnosing An Ice Machine That Will Not Run

    Electrical System Section 6 Diagnosing An Ice Machine That Will Not Run 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 111 Section 6 Electrical System Q0420/Q0450/Q0600/Q0800/Q1000 - SELF CONTAINED - 1 PHASE WITH TERMINAL BOARD CAUTION: DISCONNECT POWER BEFORE WORKING SEE SERIAL PLATE FOR VOLTAGE ON ELECTRICAL CIRCUITRY. DIAGRAM SHOWN DURING FREEZE CYCLE L2 (N) (21) (22) (20) (55) TB32 (61) TB35 WATER VALVE...
  • Page 112 Electrical System Section 6 THIS PAGE INTENTIONALLY LEFT BLANK 6-56 Part No. 80-1100-3...

  • Page 113: Refrigeration System

    Section 7 Refrigeration System Sequence of Operation SELF-CONTAINED AIR OR WATER -COOLED MODELS EVAPORATOR HEAT EXCHANGER EXPANSION VALVE HARVEST SOLENOID VALVE COMPRESSOR AIR OR WATER STRAINER CONDENSER DRIER RECEIVER (WATER COOLED ONLY) HIGH PRESSURE VAPOR HIGH PRESSURE LIQUID LOW PRESSURE LIQUID LOW PRESSURE VAPOR SV1569 Figure 7-1.
  • Page 114 Refrigeration System Section 7 E V A PO R A TO R HE AT EX CH A N GE R E X P A N S I O N V AL V E H A R V E S T S O L E N O ID V AL VE CO MP R E S S O R A I R O R W AT E R ST R AI NE R...

  • Page 115: Remote Models

    Section 7 Refrigeration System REMOTE MODELS EVAPORATOR HEAT EXCHANGER EXPANSION VALVE STRAINER COMPRESSOR HARVEST SOLENOID VALVE REMOTE CHECK VALVE CONDENSER LIQUID LINE SOLENOID VALVE HARVEST PRESSURE HEAD REGULATING VALVE PRESSURE CONTROL VALVE DRIER H.P.R. SOLENOID VALVE CHECK VALVE RECEIVER SERVICE VALVE RECEIVER HIGH PRESSURE VAPOR...
  • Page 116 Refrigeration System Section 7 EVAPORATOR HEAT EXCHANGER EXPANSION VALVE STRAINER COMPRESSOR HARVEST SOLENOID VALVE REMOTE CHECK VALVE CONDENSER LIQUID LINE SOLENOID VALVE HEAD HARVEST PRESSURE PRESSURE REGULATING VALVE DRIER CONTROL VALVE RECEIVER SERVICE H.P.R. SOLENOID VALVE VALVE CHECK VALVE RECEIVER HIGH PRESSURE VAPOR HIGH PRESSURE LIQUID LOW PRESSURE LIQUID...
  • Page 117 Section 7 Refrigeration System EVAPORATOR HEAT EXCHANGER EXPANSION VALVE STRAINER COMPRESSOR HARVEST SOLENOID VALVE REMOTE CHECK VALVE CONDENSER LIQUID LINE SOLENOID VALVE HEAD HARVEST PRESSURE PRESSURE REGULATING VALVE DRIER CONTROL VALVE RECEIVER SERVICE H.P.R. SOLENOID VALVE VALVE CHECK VALVE RECEIVER SV1568 LIQUID/VAPOR EQUALIZED TO AMBIENT CONDITIONS Figure 7-5.

  • Page 118: Q1300/Q1600/Q1800 Refrigeration Tubing Schematics

    Refrigeration System Section 7 Q1300/Q1600/Q1800 REFRIGERATION TUBING SCHEMATICS EVAPORATOR HEAT EXCHANGE EXPANSION VALVE EXPANSION VALVE HARVEST HARVEST SOLENOID VALVE SOLENOID VALVE STRAINER COMPRESSOR AIR OR WATER COOLED CONDENSER DRIER RECEIVER SV1512 Figure 7-6. Q1300/Q1600/Q1800 Self-Contained Air- or Water-Cooled Models NOTE: The refrigeration sequence for self-contained dual expansion valve ice machines is identical to self- contained single expansion valve ice machines.
  • Page 119 Section 7 Refrigeration System EVAPORATOR HEAT EXCHANGE EXPANSION VALVE EXPANSION VALVE HARVEST HARVEST SOLENOID VALVE SOLENOID VALVE COMPRESSOR STRAINER LIQUID LINE SOLENOID REMOTE VALVE CONDENSER CHECK VALVE DRIER HARVEST PRESSURE REGULATING VALVE HEAD PRESSURE RECEIVER CONTROL SERVICE VALVE VALVE CHECK VALVE H.P.R.

  • Page 120: Operational Analysis (Diagnostics)

    Refrigeration System Section 7 Operational Analysis (Diagnostics) 2. An ice machine that is low on charge may cause a good expansion valve to starve. If a service GENERAL technician fails to verify the system charge, he may When analyzing the refrigeration system, it is important replace the expansion valve in error.

  • Page 121: Before Beginning Service

    Water temp. entering sump trough: _______ ° • 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. Part No. 80-1100-3...

  • Page 122: Installation/Visual Inspection Checklist

    Refrigeration System Section 7 INSTALLATION/VISUAL INSPECTION CHECKLIST WATER SYSTEM CHECKLIST A water-related problem often causes the same Possible Problem Corrective Action symptoms as a refrigeration system component Ice machine is not level Level the ice machine malfunction. Improper clearance around Reinstall according to the Example: A water dump valve leaking during the freeze top, sides and/or back of ice...

  • Page 123: Ice Formation Pattern

    However, when but ice forms on the intlet half of the evaporator. Or, the this analysis is used along with Manitowoc’s ice at the outlet of the evaporator reaches 1/8" to initiate Refrigeration System Operational Analysis Table, it can a harvest, but the intlet of the evaporator already has help diagnose an ice machine malfunction.
  • Page 124 Refrigeration System Section 7 3. Extremely Thin at Evaporator Inlet 5. No Ice Formation There is no ice, or a considerable lack of ice formation The ice machine operates for an extended period, but on the intlet of the evaporator (tubing inlet). Examples: there is no ice formation at all on the evaporator.

  • Page 125: Safety Limits

    Section 7 Refrigeration System SAFETY LIMITS Control Board with Orange Label General When a safety limit condition is exceeded for 3 consecutive cycles the control board enters the limit into In addition to standard safety controls, such as high memory and the ice machine continues to run. Use the pressure cut-out, the control board has two built in safety following procedures to determine if the control board limit controls which protect the ice machine from major...
  • Page 126 Refrigeration and electrical component failures may also trip a safety limit. Eliminate all electrical components and external causes first. If it appears that the refrigeration system is causing the problem, use Manitowoc’s Refrigeration System Operational Analysis Table, along with detailed charts, checklists, and other references to determine the cause.
  • Page 127 High water temperature (90°F/32.2°C max.) Dirty condenser Dirty/defective water regulating valve Water regulating valve out of adjustment Refrigeration system Non-Manitowoc components Improper refrigerant charge Defective head pressure control (remotes) Defective harvest valve Defective compressor TXV starving or flooding (check bulb mounting)
  • Page 128 Ice thickness probe out of adjustment Ice thickness probe dirty Bin switch defective Premature harvest Refrigeration system Non-Manitowoc components Water regulating valve dirty/defective Improper refrigerant charge Defective head pressure control valve (remotes) Defective harvest pressure control (HPR) valve (remotes) Defective harvest valve...

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

    Water regulating valve out of adjustment Improper refrigerant charge Overcharged Non-condensables in system Wrong type of refrigerant Other Non-Manitowoc components in system High side refrigerant lines/component restricted (before mid-condenser) Defective head pressure control valve (remote models) Freeze Cycle Discharge Pressure Low Checklist Possible Cause Check/Correct Improper installation See “Installation/Visual Inspection Checklist”...

  • Page 130: Analyzing Suction Pressure During Freeze Cycle

    Refrigeration System Section 7 ANALYZING SUCTION PRESSURE NOTE: Analyze discharge pressure before analyzing DURING FREEZE CYCLE suction pressure. High or low discharge pressure may be causing high or low suction pressure. The suction pressure gradually drops throughout the freeze cycle. The actual suction pressure (and drop rate) changes as the air and water temperatures entering the ice machine change.
  • Page 131 (See “Freeze Cycle Discharge Pressure High Checklist” on Page 7-16) Improper refrigerant charge Overcharged Wrong type of refrigerant Other Non-Manitowoc components in system H.P.R. solenoid leaking harvest valve stuck open TXV flooding (check bulb mounting) Defective compressor Freeze Cycle Suction Pressure Low Checklist...

  • Page 132: Single Expansion Valve Ice Machines - Comparing Evaporator Inlet And Outlet Temperatures

    Important machine. However, comparing these temperatures Do not simply insert the sensing device under the during the freeze cycle, along with using Manitowoc’s insulation. It must be attached to and reading the Refrigeration System Operational Analysis Table, can actual temperature of the copper line.

  • Page 133: Harvest Valve Temperature Check

    Refer to the Parts Manual for proper valve application. If touch after 5 minutes into the freeze replacement is necessary, Use only “original” Manitowoc cycle. replacement parts. The inlet of the...

  • Page 134: Discharge Line Temperature Analysis

    Refrigeration System Section 7 DISCHARGE LINE TEMPERATURE ANALYSIS Procedure General Connect a temperature probe on the compressor discharge line with-in 6" of the compressor and insulate. Knowing if the discharge line temperature is increasing, decreasing or remaining constant can be an important Observe the discharge line temperature for the last three diagnostic tool.
  • Page 135 Section 7 Refrigeration System THIS PAGE INTENTIONALLY LEFT BLANK 7-23 Part No. 80-1100-3...

  • Page 136: How To Use The Refrigeration System Operational Analysis Tables

    Refrigeration System Section 7 HOW TO USE THE REFRIGERATION SYSTEM Final Analysis OPERATIONAL ANALYSIS TABLES The column with the highest number of check marks General identifies the refrigeration problem. These tables must be used with charts, checklists and COLUMN 1 - HARVEST VALVE LEAKING other references to eliminate refrigeration components A leaking harvest valve must be replaced.

  • Page 137: Refrigeration System Operational Analysis Tables

    Section 7 Refrigeration System REFRIGERATION SYSTEM OPERATIONAL ANALYSIS TABLES Q, J and B Model Single Expansion Valve This table must be used with charts, checklists and other references to eliminate refrigeration components not listed on the table and external items and problems, which can cause good refrigeration components to appear defective.
  • Page 138 Refrigeration System Section 7 Q and J Model Dual Expansion Valve This table must be used with charts, checklists and other references to eliminate refrigeration components not listed on the table and external items and problems, which can cause good refrigeration components to appear defective. Operational Analysis Ice Production Air-Temperature Entering Condenser____________...

  • Page 139: Harvest Pressure Regulating (H.p.r.) System

    Section 7 Refrigeration System HARVEST PRESSURE REGULATING Figure 7-13. H.P.R. Valve (H.P.R.) SYSTEM Remotes Only GENERAL The harvest pressure regulating (H.P.R.) system includes: • Harvest pressure regulating solenoid valve (H.P.R. solenoid). This is an electrically operated valve which opens when energized, and closes when de- energized.
  • Page 140 Refrigeration System Section 7 FREEZE CYCLE The H.P.R. system is not used during the freeze cycle. The H.P.R. solenoid is closed (de-energized), preventing refrigerant flow into the H.P.R. valve. HARVEST CYCLE During the harvest cycle, the check valve in the discharge line prevents refrigerant in the remote condenser and receiver from backfeeding into the evaporator and condensing to liquid.
  • Page 141 Section 7 Refrigeration System HPR DIAGNOSTICS 6. Freeze cycle Head Pressure 220 psig or higher? Steps 1 through 4 can be quickly verified without If the head pressure is lower than 220 psig refer to attaching a manifold gauge set or thermometer. headmaster diagnostics.

  • Page 142: Headmaster Control Valve

    1. Determine the air temperature entering the remote valves with special settings. Replace defective condenser. headmaster control valves only with “original” Manitowoc 2. Determine if the head pressure is high or low in replacement parts. relationship to the outside temperature. (Refer to the Operation proper “Operational Pressure Chart”...
  • Page 143 Section 7 Refrigeration System LOW ON CHARGE VERIFICATION FAN CYCLE CONTROL VS. HEADMASTER The remote ice machine requires more refrigerant A fan cycle control cannot be used in place of a charge at lower ambient temperatures than at higher headmaster. The fan cycle control is not capable of temperatures.

  • Page 144: Pressure Control Specifications And Diagnostics

    Refrigeration System Section 7 Pressure Control Specifications and HIGH PRESSURE CUT-OUT (HPCO) CONTROL Diagnostics Function FAN CYCLE CONTROL Stops the ice machine if subjected to excessive high- side pressure. (Self-Contained Air-Cooled Models Only) The HPCO control is normally closed, and opens on a Function rise in discharge pressure.

  • Page 145: Cycle Time/24 Hour Ice Production/Refrigerant Pressure Charts

    Section 7 Refrigeration System Cycle Time/24 Hour Ice Production/ Q200 SERIES Refrigerant Pressure Charts Self-Contained Water-Cooled Q200 SERIES NOTE: These characteristics may vary depending on operating conditions. Self-Contained Air-Cooled Cycle Times NOTE: These characteristics may vary depending on operating conditions. Freeze Time + Harvest Time = Total Cycle Time Cycle Times Air Temp.

  • Page 146: Q280 Series

    Refrigeration System Section 7 Q280 SERIES Q280 SERIES Self-Contained Air-Cooled Self-Contained Water-Cooled NOTE: These characteristics may vary depending on NOTE: These characteristics may vary depending on operating conditions. operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp.

  • Page 147: Q320 Series

    Section 7 Refrigeration System Q320 SERIES Q320 SERIES Self-Contained Air-Cooled Self-Contained Water-Cooled NOTE: These characteristics may vary depending on NOTE: These characteristics may vary depending on operating conditions. operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp.

  • Page 148: Q370 Series

    Refrigeration System Section 7 Q370 SERIES Q370 SERIES Self-Contained Air-Cooled Self-Contained Water-Cooled NOTE: These characteristics may vary depending on NOTE: These characteristics may vary depending on operating conditions. operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp.

  • Page 149: Q420/450 Series

    Section 7 Refrigeration System Q420/450 SERIES Q420/450 SERIES Self-Contained Air-Cooled Self-Contained Water-Cooled NOTE: These characteristics may vary depending on NOTE: These characteristics may vary depending on operating conditions. operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp.

  • Page 150: Q450 Series

    Refrigeration System Section 7 Q450 SERIES Q600 SERIES Remote Self-Contained Air-Cooled NOTE: These characteristics may vary depending on NOTE: These characteristics may vary depending on operating conditions. operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp.
  • Page 151 Section 7 Refrigeration System Q600 SERIES Q600 SERIES Self-Contained Water-Cooled Remote NOTE: These characteristics may vary depending on NOTE: These characteristics may vary depending on operating conditions. operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp.

  • Page 152: Q800 Series

    Refrigeration System Section 7 Q800 SERIES Q800 SERIES Self-Contained Air-Cooled Self-Contained Water-Cooled NOTE: These characteristics may vary depending on NOTE: These characteristics may vary depending on operating conditions. operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp.

  • Page 153: Q1000 Series

    Section 7 Refrigeration System Q800 SERIES Q1000 SERIES Remote Self-Contained Air-Cooled NOTE: These characteristics may vary depending on NOTE: These characteristics may vary depending on operating conditions. operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp.
  • Page 154 Refrigeration System Section 7 Q1000 SERIES Q1000 SERIES Self-Contained Water-Cooled Remote NOTE: These characteristics may vary depending on NOTE: These characteristics may vary depending on operating conditions. operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp.

  • Page 155: Q1300 Series

    Section 7 Refrigeration System Q1300 SERIES Q1300 SERIES Self-Contained Air-Cooled Self-Contained Water-Cooled NOTE: These characteristics may vary depending on NOTE: These characteristics may vary depending on operating conditions. operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp.

  • Page 156: Q1600 Series

    Refrigeration System Section 7 Q1300 SERIES Q1600 SERIES Remote Self-Contained Water-Cooled NOTE: These characteristics may vary depending on NOTE: These characteristics may vary depending on operating conditions. operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp.

  • Page 157: Q1800 Series

    Section 7 Refrigeration System Q1600 SERIES Q1800 SERIES Remote Self-Contained Air-Cooled NOTE: These characteristics may vary depending on NOTE: These characteristics may vary depending on operating conditions. operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp.
  • Page 158 Refrigeration System Section 7 Q1800 SERIES Q1800 SERIES Self-Contained Water-Cooled Remote NOTE: These characteristics may vary depending on NOTE: These characteristics may vary depending on operating conditions. operating conditions. Cycle Times Cycle Times Freeze Time + Harvest Time = Total Cycle Time Freeze Time + Harvest Time = Total Cycle Time Air Temp.

  • Page 159: Refrigerant Recovery/Evacuation And Recharging

    MANIFOLD SET Important OPEN OPEN Manitowoc Ice, Inc. assumes no responsibility for the use of contaminated refrigerant. Damage resulting from the use of contaminated refrigerant is BACKSEATED BACKSEATED LOW SIDE HIGH SIDE the sole responsibility of the servicing company.
  • Page 160 3. Open the high side manifold gauge valve, and backseat the high side service valve. The charge is critical on all Manitowoc ice machines. Use a scale or a charging cylinder to 4. Open the charging cylinder and add the proper ensure the proper charge is installed.

  • Page 161: Normal Remote Model Procedures

    Section 7 Refrigeration System NORMAL REMOTE MODEL PROCEDURES NOTE: Manitowoc recommends using an access valve core removal and installation tool on the discharge line Refrigerant Recovery/Evacuation quick-connect fitting. This permits access valve core Do not purge refrigerant to the atmosphere. Capture removal.
  • Page 162 Refrigeration System Section 7 EV A PO RAT O R HEAT E X CHANGER EX PANSIO N V A LV E H O T GAS SO LEN O ID V A LV ES LO W SIDE SER V ICE V A LV E (B AC K SEATED ) C O M PRESS O R STRAINER...
  • Page 163 Section 7 Refrigeration System Remote Charging Procedures NOTE: Backseat the receiver outlet service valve after charging is complete and before operating the ice 1. Be sure the toggle switch is in the OFF position. machine. If the access valve core removal and 2.
  • Page 164 Refrigeration System Section 7 HEAT E X CHANGER EV A PO RAT O R EX PANSIO N V A LV E H O T GAS SO LEN O ID V A LV ES LO W SIDE SER V ICE V A LV E (B AC K SEATED ) STRAINER C O M PRESS O R...

  • Page 165: System Contamination Clean-Up

    If a refrigerant test kit indicates harmful levels of Important contamination, or if a test kit is not available, inspect the Manitowoc Ice, Inc. assumes no responsibility for compressor oil. the use of contaminated refrigerant. Damage 1. Remove the refrigerant charge from the ice resulting from the use of contaminated refrigerant is machine.
  • Page 166 Refrigeration System Section 7 Mild System Contamination Cleanup Procedure Severe System Contamination Cleanup Procedure 1. Replace any failed components. 1. Remove the refrigerant charge. 2. If the compressor is good, change the oil. 2. Remove the compressor. 3. Replace the liquid line drier. 3.

  • Page 167: Replacing Pressure Controls Without Removing Refrigerant Charge

    Section 7 Refrigeration System 10. Follow the normal evacuation procedure, except REPLACING PRESSURE CONTROLS WITHOUT REMOVING REFRIGERANT CHARGE replace the evacuation step with the following: This procedure reduces repair time and cost. Use it when any of the following components require Important replacement, and the refrigeration system is operational Dry nitrogen is recommended for this procedure.
  • Page 168 Refrigeration System Section 7 SV1406 Figure 7-18. Using Pinch-Off Tool 7-56 Part No. 80-1100-3...

  • Page 169: Filter-Driers

    Manitowoc specifications. This information is for reference only. Refer to the The difference between Manitowoc driers and off-the- ice machine serial number tag to verify the system shelf driers is in filtration. Manitowoc driers have dirt- charge. Serial plate...

  • Page 170: Refrigerant Definitions

    Refrigeration System Section 7 REFRIGERANT DEFINITIONS Reclaim Recover To reprocess refrigerant to new product specifications (see below) by means which may include distillation. A To remove refrigerant, in any condition, from a system chemical analysis of the refrigerant is required after and store it in an external container, without necessarily processing to be sure that product specifications are testing or processing it in any way.

  • Page 171: Refrigerant Re-Use Policy

    Section 7 Refrigeration System REFRIGERANT RE-USE POLICY 3. Recovered or Recycled Refrigerant Manitowoc recognizes and supports the need for proper • Must be recovered or recycled in accordance handling, re-use, and disposal of, CFC and HCFC with current local, state and federal laws.

  • Page 172: Hfc Refrigerant Questions And Answers

    HFC refrigerants. refrigeration system. Refrigeration systems and 6. Does Manitowoc use a special liquid line filter-drier compressors should not be left open to the with HFC refrigerants? atmosphere for more than 15 minutes. Keep oil containers and compressors capped at all times to Yes.
  • Page 173 HFC use, this equipment should be 10. How do I charge a system with HFC refrigerant? used specifically with HFC refrigerants only. The same as R-502. Manitowoc recommends charging only liquid refrigerant into the high side of the system.
  • Page 174 Refrigeration System Section 7 THIS PAGE INTENTIONALLY LEFT BLANK 7-62 Part No. 80-1100-3...
  • Page 175 Section 7 Refrigeration System THIS PAGE INTENTIONALLY LEFT BLANK 7-63 Part No. 80-1100-3...

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