Manitowoc S Service Manual
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Manitowoc S Service Manual

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S Model
Ice Machines
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Thank you for selecting a Manitowoc Ice Machine, the dependability leader in ice making equipment and related products.
With proper installation, care and maintenance, your new Manitowoc Ice Machine will provide you with many years of
reliable and economical performance.
This manual is updated as new information and models
Part Number 80-1480-3
are released. Visit our website for the latest manual.
01/2005
www.manitowocice.com

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Summary of Contents for Manitowoc S

  • Page 1 Service Manual Thank you for selecting a Manitowoc Ice Machine, the dependability leader in ice making equipment and related products. With proper installation, care and maintenance, your new Manitowoc Ice Machine will provide you with many years of reliable and economical performance.

  • Page 2: Safety Notices

    Safety Notices Procedural Notices As you work on a S-Series Ice Machine, be sure to pay As you work on a S-Series Ice Machine, be sure to read close attention to the safety notices in this manual. the procedural notices in this manual. These notices...
  • 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

    Arctic Pure Water Filter System ....... . . Manitowoc Cleaner and Sanitizer ....... .
  • Page 6 Quick Connect Fittings ......... 2-18 Non-Manitowoc Multi-Circuit Condenser Sizing Chart ....2-19 Installation Check List .
  • Page 7 Table of Contents (continued) Section 4 Maintenance General ............Ice Machine Inspection .
  • Page 8 Table of Contents (continued) Ice Thickness Probe (Harvest Initiation) ......6-37 How The Probe Works ......... 6-37 Harvest Light .
  • Page 9 Table of Contents (continued) Refrigerant Recovery/Evacuation and Recharging ....7-44 Normal Self-Contained Model Procedures ......7-44 Normal Remote Model Procedures .
  • Page 10 Table of Contents (continued) Part No. 80-1480-3...

  • Page 11: General Information

    3 DICE WAT ER-COOLED 4 HALF-DICE AIR-COOLED SY0304A SY0305W ---- 5 HALF-DICE WAT ER-COOLED SD0322A SD0323W ---- SY0324A SY0325W ---- S Y 1094 SR0420A SR0421W ---- SD0422A SD0423W ---- SY0424A SY0425W ICE MACHINE ICE MACHINE MODEL SERIES SD0452A SD0453W ----...

  • Page 12: Accessories

    General Information Section 1 Accessories MANITOWOC CLEANER AND SANITIZER Manitowoc Ice Machine Cleaner and Sanitizer are Contact your Manitowoc distributor for these optional available in convenient 16 oz. (473 ml) bottles. These accessories: are the only cleaner and sanitizer approved for use with BIN CASTER Manitowoc products.

  • Page 13: Model/Serial Number Location

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

  • Page 14: Owner Warranty Registration Card

    Owner Warranty Registration Card GENERAL EXCLUSIONS The packet containing this manual also includes The following items are not included in the ice machine’s warranty information. Warranty coverage begins the day warranty coverage: your new ice machine is installed. 1. Normal maintenance, adjustments and cleaning.

  • Page 15: Installation Instructions

    These instructions are provided to assist the qualified Important installer. Check your local Yellow Pages for the name of the nearest Manitowoc distributor, or call Manitowoc Ice, Failure to follow these installation guidelines may Inc. for information regarding start-up services.

  • Page 16: S600 Air And Water-Cooled Ice Machines

    Installation Instructions Section 2 S600 AIR AND WATER-COOLED ICE MACHINES 1.50" (3.81cm) ELECTRICAL 8.50" (21.60cm) AUCS 6.50" (16.5cm) CONNECTIONS CONDENSER WATER OUTLET 1/2"FPT (Water-Cooled Only) 2.61" (6.62cm) 2.85" (7.30cm) 5.06" (12.85cm) 1.81" 6.68" (16.96cm) AUXILLARY BASE DRAIN (4.59cm) 1/2"CPVC SOCKET 7.75"...

  • Page 17: S300/S450/S500/S850/S1000 Air And Water-Cooled Ice Machines

    Section 2 Installation Instructions S300/S450/S500/S850/S1000 AIR AND WATER-COOLED ICE MACHINES ELECTRICAL 2.20" (5.58cm) AUCS CONNECTIONS 1.81" (4.59cm) 4.21" (10.69cm) CONDENSER WATER OUTLET 1/2"FPT (Water-Cooled Only) 2.61" (6.62cm) 2.85" (7.30cm) 5.06" (12.85cm) 1.06 (2.7cm) 6.68" (16.96cm) AUXILLARY BASE CONDENSER WATER DRAIN 1/2"CPVC 8.49"...

  • Page 18: S500/S850/S1000 Remote Ice Machines

    Installation Instructions Section 2 S500/S850/S1000 REMOTE ICE MACHINES ELECTRICAL REMOTE CONDENSER 2.20" (5.58cm) ELECTRICAL 1.81" (4.59cm) 6.12" (15.54cm) 1.06 (2.69cm) 2.61" (6.62cm) 5.06" (12.85cm) 6.68" (16.96cm) REFRIGERANT 12.26" (42.27cm) WATER INLET LIQUID LINE 3/8"FPT 16.64" (64.82cm) REFRIGERANT DRAIN 1/2"NPTF DISCHARGE LINE SV3146B SV3146 Ice Machine...

  • Page 19: S1400 / S1800 Air And Water-Cooled Ice Machines

    Section 2 Installation Instructions S1400 / S1800 AIR AND WATER-COOLED ICE MACHINES 2.50" (6.35cm) ELECTRICAL 11.0" (27.9cm) CONDENSER WATER AuCS OUTLET 1/2"FPT Connections (Water-Cooled Only) WATER INLET 5.75" (14.6cm) 3/8"FPT 2.0" (5.1cm) 1.1" (2.8cm) CONDENSER WATER INLET 3/8"FPT 4.0" 7.8" (19.8cm) (Water-Cooled Only) (10.2cm) 10.25"...

  • Page 20: Ice Storage Bin Dimensions

    Installation Instructions Section 2 Ice Storage Bin Dimensions 30 INCH (76 CM) ICE STORAGE BINS 48 INCH (130 CM) ICE STORAGE BINS SV1609 SV1297 Bin Model Dimension A Dimension B B970 B170 29.5 in (74.9 cm) 19.1 in (48.5 cm) B420 34.0 in (86.3 cm) 32.0 in (81.3 cm)

  • Page 21: Location Of Ice Machine

    Section 2 Installation Instructions Location of Ice Machine Ice Machine Heat of Rejection The location selected for the ice machine must meet the Heat of Rejection following criteria. If any of these criteria are not met, Series Ice Machine select another location. Air Conditioning Peak S300...

  • Page 22: Removing Drain Plug And Leveling The Ice Storage Bin

    6. Inspect bin gasket prior to ice machine installation. BAFFLE (Manitowoc bins come with a closed cell foam gasket installed along the top surface of the bin.) 7. Remove all panels from ice machine before lifting.

  • Page 23: Electrical Service

    (when the electrical wire size of the electrical supply. (Minimum circuit load is highest). ampacity is not the ice machine’s running amp load.) The wire size (or gauge) is also dependent upon Warning location, materials used, length of run, etc., so it must be The ice machine must be grounded in accordance determined by a qualified electrician.

  • Page 24: Self-Contained Electrical Wiring Connections

    Installation Instructions Section 2 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 25: Remote Electrical Wiring Connections

    Section 2 Installation Instructions 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 SINGLE wire routing, wire sizing, disconnects, etc., only the CIRCUIT correct wire connections. NOTE: FAN REMOTE MOTOR IS...

  • Page 26: 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 Arctic Puref water filter system, refer to the Installation Instructions • Run separate bin and ice machine drain lines.

  • Page 27: Water Supply And Drain Line Sizing/Connections

    Section 2 Installation Instructions 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 35°F (1.6°C) Min. 20 psi (137.9 kPA) Min. 3/8"...

  • Page 28: Remote Condenser/Line Set Installation

    Installation Instructions Section 2 Remote Condenser/Line Set Installation IMPORTANT EPA CERTIFIED TECHNICIANS Remote Single If remote line set length is between 50' and 100' (15.25- Ice Machine Circuit Line Set* 1.5 lb. (24 oz) (0.68 kg) 30.5 m), add of refrigerant to the Condenser nameplate charge.

  • Page 29: 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 Routing Line Sets...

  • Page 30: Calculating Remote Condenser Installation Distances

    Installation Instructions Section 2 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 31: Lengthening Or Reducing Line Set Lengths

    Section 2 Installation Instructions 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 32: Remote Ice Machine Usage With Non-Manitowoc Multi-Circuit Condensers

    Manitowoc condenser. It is recommended that this shall not apply to any ice machine installed and/or circuit be used to control the condenser fan(s) on the maintained inconsistent with the technical instructions multi-circuit condenser to assure it is on at the proper provided by Manitowoc Ice, Inc.

  • Page 33: Non-Manitowoc Multi-Circuit Condenser Sizing Chart

    Section 2 Installation Instructions 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 500 psig...

  • Page 34: Installation Check List

    Have all of the electrical and water Has the owner/operator been instructed connections been made? regarding maintenance and the use of Manitowoc Cleaner and Sanitizer? Has the supply voltage been tested and checked against the rating on the nameplate? Has the owner/operator completed the...

  • Page 35: Before Starting The Ice Machine

    Before Starting the Ice Machine AuCS Automatic Cleaning System ® All Manitowoc ice machines are factory-operated and This optional accessory monitors ice making cycles and adjusted before shipment. Normally, new installations do initiates cleaning procedures automatically. The AuCS® not require any adjustment.
  • Page 36 Installation Instructions Section 2 THIS PAGE INTENTIONALLY LEFT BLANK 2-22 Part Number 80-1480-3...

  • Page 37: Ice Machine Operation

    Section 3 Ice Machine Operation Section 3 Ice Machine Operation Component Identification Water Distribution Tube Toggle Switch Water Curtain Dump Valve Check Valve sv3149 Ice Thickness Probe Bin Switch Water Level Probe Water Inlet Location Water Pump Water Inlet Valve (Located in Refrigeration Compartment) sv3150 Part Number 80-1480-3...

  • Page 38: Sequence Of Operation

    Freeze and Harvest Sequences. The water fill valve is energized at the same time as the compressor. The harvest valve(s) remains on for 5 seconds during initial compressor start- up and then shuts off.

  • Page 39: Harvest Sequence

    5. Water Purge The control board has the following non-adjustable safety timers: The harvest valve(s) opens at the beginning of the water purge to divert hot refrigerant gas into the evaporator. • The ice machine is locked into the freeze cycle for 6 minutes before a harvest cycle can be initiated.

  • Page 40: Operational Checks

    The ice thickness probe is factory-set to maintain the ice GENERAL bridge thickness at 1/8" (.32 cm). 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 41: Harvest Sequence Water Purge

    Section 3 Ice Machine Operation HARVEST SEQUENCE WATER PURGE • During the harvest sequence water purge, the water fill valve energizes and de-energizes by time. The The harvest sequence water purge adjustment may be water purge must be at the factory setting of 45 used when the ice machine is hooked up to special seconds for the water fill valve to energize during the water systems, such as a de-ionized water treatment...
  • Page 42 Ice Machine Operation Section 3 THIS PAGE INTENTIONALLY LEFT BLANK Part Number 80-1480-3...

  • Page 43: Maintenance

    If you do not understand the procedures or the condenser. safety precautions that must be followed, call your local Manitowoc service representative to perform A dirty condenser restricts airflow, resulting in the maintenance procedures for you. excessively high operating temperatures. This reduces ice production and shortens component life.

  • Page 44: Water-Cooled Condenser And Water Regulating Valve

     ! Caution surface of the plastic ice machine part. AlphaSan’s unique ability to effectively control the release of silver If you are cleaning the condenser fan blades with not only protects against undesired discoloration of the water, cover the fan motor to prevent water damage plastic, but also will last the life of the plastic part.

  • Page 45: Guardian

    INSTALLATION SACHET REPLACEMENT FREQUENCY If the Guardian system has been ordered, install the Sachet packet(s) require replacement every thirty (30) sachet holder in the inside of the front panel. days or whenever they come in direct contact with water. Refer to chart below for requirements.

  • Page 46: Interior Cleaning And Sanitizing

    Step 3 Wait about two minutes or until water starts to flow over the evaporator. ! Caution Step 4 Add the proper amount of Manitowoc Ice Use only Manitowoc approved Ice Machine Cleaner Machine Cleaner to the water trough. (part number 94-0546-3) and Sanitizer (part number 94-0565-3).

  • Page 47: Sanitizing Procedure

    Section 4 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 48: Removal Of Parts For Cleaning/Sanitizing

    Ice Machine Cleaner or clear water. Sanitizer. 8. Install the removed parts. 4. Soak the removed part(s) in a properly mixed NOTE: Incomplete rinsing of the ice thickness probe or solution. water level probe may leave a residue. This could cause the ice machine to malfunction.
  • Page 49 Section 4 Maintenance 1. Water Curtain 2. Ice Thickness Probe A. Gently flex the curtain in the center and remove A. Compress the hinge pin on the top of the ice it from the right side. thickness probe. B. Slide the left pin out. STEP 1 STEP 2 COMPRESS...
  • Page 50 Maintenance Section 4 3. Water Distribution Tube 4. Water Trough A. Depress tabs on right and left side of the water Warning trough. Removing the distribution tube while the water B. Allow front of water trough to drop as you pull pump is running will allow water to spray from ice forward to disengage the rear pins.
  • Page 51 Section 4 Maintenance Water Level Probe Water Pump 1. Remove the water trough. Warning Disconnect the electric power to the ice machine at Warning the electric service switch box and turn off the water Disconnect the electrical power to the ice machine supply before proceeding.
  • Page 52 2. Set the toggle switch to ICE. remove the spring from the plunger. If it is removed, slide the spring’s flared end into the plunger’s slotted top 3. While the ice machine is in the freeze mode, check opening until the spring contacts the plunger spring stop.
  • Page 53 Section 4 Maintenance Evaporator Tray Removal Drain Line Check Valve 1. Remove the water trough. The drain line check valve normally does not require removal for cleaning. Water loss from the sump trough 2. Remove thumbscrew on left side of tray. will indicate removal and cleaning are required.

  • Page 54: Removing The Front Panels

    Maintenance Section 4 Removing the Front Panels Water Inlet Valve The water inlet valve normally does not require removal NOTE: The front panels do not normally have to be for cleaning. Refer to Section 5 for a list of causes for removed.

  • Page 55: Removal From Service/Winterization

    Section 4 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 56 Maintenance Section 4 THIS PAGE INTENTIONALLY LEFT BLANK 4-14 Part Number 80-1480-3...

  • Page 57: Checklist

    Water curtain stuck open. Water curtain must be installed and swinging freely. (See Section 4) Remote receiver service valve and/or Open the valve(s). (See Section 2) Liquid/suction line shut off valves are closed. Ice machine stops, and can be restarted Safety limit feature stopping the ice Refer to “Safety Limit Feature”...

  • Page 58: Safety Limit Feature

    In addition to the standard safety controls, such as the A. If the safety limit feature has stopped the ice high pressure cutout, your Manitowoc ice machine machine, it will restart after a short delay. features built-in safety limits which will stop the ice Proceed to step 2.
  • Page 59 Section 5 Before Calling For Service THIS PAGE INTENTIONALLY LEFT BLANK Part Number 80-1480-3...
  • Page 60 Before Calling For Service Section 5 THIS PAGE INTENTIONALLY LEFT BLANK Part Number 80-1480-3...

  • Page 61: Energized Parts Charts

    Section 6 Electrical System Section 6 Electrical System Energized Parts Charts SELF-CONTAINED AIR- AND WATER-COOLED MODELS Control Board Relays Contactor Ice Making Length Sequence Of Harvest Harvest Water Cond. Of Time Water Dump Contactor Operation Valve Valve Inlet Comp. Pump Comp.* Valve Coil...

  • Page 62: Bin Switch

    Electrical System Section 6 REMOTE MODELS Control Board Relays Contactor Ice Making Harvest Length Contactor Sequence Of Valve Harvest Water Cond. Of Time Coil Water Dump Operation (Left) Valve Inlet Comp. Pump Comp.* Valve Liquid Line (Right)* Valve Motor Solenoid Valve 35 sec.
  • Page 63 This ensures that the Contactor Coil ice-making cycle starts with fresh (25) (56) Air Compressor water. (26) The harvest valve(s) is also Ice Thickness (74) Probe energized during the water purge. In Bin Switch Water Level Probe Low DC...
  • Page 64 The water fill valve is energized at Water Pump (57) the same time as the compressor. (98) (42) Trans. The harvest valve(s) remains on for (58) Fuse (7a) Terminates at the first 5 seconds of the initial Pin Connection (59)
  • Page 65 Section 6 Electrical System Freeze Sequence L2 or N 3. PRE-CHILL Ground Water Valve (99) (21) (20) (55) (89) To pre-chill the evaporator, the (22) (61) High compressor runs for 30 seconds (60 Control Board Harvest Valve Pressure (77) seconds initial cycle) prior to water Cutout (88) (60)
  • Page 66 Electrical System Section 6 4. FREEZE L2 or N Ground The water pump starts after the pre- Water Valve (99) (21) (20) chill. An even flow of water is directed (55) (89) (22) (61) across the evaporator and into each High Control Board Harvest Valve...
  • Page 67 Harvest Sequence L2 or N Ground 5. WATER PURGE Water Valve (99) (21) (20) (55) (89) The harvest valve(s) opens at the (22) (61) High beginning of the water purge to divert Control Board Harvest Valve Pressure (77) Cutout hot refrigerant gas into the...
  • Page 68 Electrical System Section 6 6. HARVEST L2 or N Ground The harvest valve(s) remains open Water Valve (99) (21) (20) and the refrigerant gas warms the (55) (89) (22) (61) evaporator. This causes the cubes to High Control Board Harvest Valve...
  • Page 69 Section 6 Electrical System Automatic Shut-Off 7. AUTOMATIC SHUT-OFF L2 or N Ground When the storage bin is full at the Water Valve (99) (21) (20) end of a harvest cycle, the sheet of (55) (89) (22) (61) cubes fails to clear the water curtain High Control Board Harvest Valve...
  • Page 70 Electrical System Section 6 THIS PAGE INTENTIONALLY LEFT BLANK 6-10 Part Number 80-1480-3...

  • Page 71: Remote Models

    Section 6 Electrical System REMOTE MODELS Water Valve Initial Start-Up Or Start-Up After (21) (22) (20) (L2) (L1) Automatic Shut-Off Ground (82) HPR Valve (78) 1. WATER PURGE (89) (55) (61) (79) (77) Control Board (80) Before the compressor starts, the High Pressure Cut-out (60)
  • Page 72 Electrical System Section 6 2. REFRIGERATION SYSTEM START-UP Water Valve The compressor, remote condenser fan motor (21) (20) (22) (L2) (L1) and liquid line solenoid valve energize after Ground (82) HPR Valve the 45-second water purge, and remain on (78) (89) (55) (61)
  • Page 73 Section 6 Electrical System Freeze Sequence Water Valve 3. PRE-CHILL (21) (20) (22) (L2) (L1) Ground (82) To pre-chill the evaporator, the HPR Valve (78) compressor runs for 30 seconds (60 (89) (55) (61) (79) seconds initial cycle) prior to water (77) Control Board (80)
  • Page 74 Electrical System Section 6 4. FREEZE The water pump starts after the pre- Water Valve (21) (20) (22) (L2) (L1) chill. An even flow of water is directed Ground (82) HPR Valve across the evaporator and into each (78) (89) (55) cube cell, where it freezes.
  • Page 75 Section 6 Electrical System Harvest Sequence Water Valve 5. WATER PURGE (21) (20) (22) (L2) (L1) Ground The harvest valve and HPR solenoid (82) HPR Valve (78) also open at the beginning of the (89) (55) (61) (79) water purge to divert hot refrigerant Control Board (77) (80)
  • Page 76 Electrical System Section 6 6. HARVEST Water Valve The harvest valve(s) and HPR (21) (20) (22) (L2) (L1) solenoid valve remain open, allowing Ground (82) HPR Valve refrigerant gas to warm the (78) (89) (55) (61) (79) evaporator. This causes the cubes to...
  • Page 77 Section 6 Electrical System Automatic Shut-Off 7. AUTOMATIC SHUT-OFF Water Valve (21) (20) (22) (L2) (L1) If the storage bin is full at the end of a Ground (82) HPR Valve harvest cycle, the sheet of cubes fails (78) (89) (55) (61) (79)
  • Page 78 Electrical System Section 6 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 79 Section 6 Electrical System S320 SELF CONTAINED- 1 PHASE SEE SERIAL PLATE FOR VOLTAGE L2 OR N (21) (20) GROUND (22) WATER (61) VALVE CONTROL BOARD (99) (55) (77) (89) (60) (80) HARVEST SOLENOID HIGH PRESSURE CUTOUT (75) (76) (88) DUMP (81) SOLENOID...
  • Page 80 Electrical System Section 6 S300/S420/S450- SELF CONTAINED - 1 PHASE L2 or N Water Valve (99) (20) (21) Ground (61) (22) Control Board Harvest Valve (89) (55) (77) (60) (80) High Pressure Dump Valve (88) Cutout (75) (76) (81) (57) Water Pump (98) (99)
  • Page 81 Section 6 Electrical System S500/S600/S850/S1000/S1200 - SELF CONTAINED - 1 PHASE L2 or N Ground (99) Water Valve (20) (21) (89) (55) (22) (61) Control Harvest Valve High Pressure Board Cutout (77) (88) (60) (80) Dump Valve (76) (75) (81) Water Pump (98) (57)
  • Page 82 Electrical System Section 6 S850/S1000/S1200 - SELF CONTAINED - 3 PHASE (99) Water Valve Ground (20) (21) (61) (22) Control (89) (55) Board Harvest Valve (77) High Pressure (80) (60) Cutout (88) Dump Valve (76) (81) Water Pump (57) (98) (99) Trans.
  • Page 83 Section 6 Electrical System S500/S600/S850/S1000 - REMOTE - 1 PHASE Water Valve (22) (21) (20) L2 or N Ground HPR Valve (78) (89) (55) (79) (61) Harvest Valve Control (82) High Pressure (77) Board Cutout (88) (80) (60) Dump Valve (76) (81) Water Pump...
  • Page 84 Electrical System Section 6 S850/S1000 - REMOTE - 3 PHASE Water Valve (22) (21) (20) Ground HPR Valve (82) (89) (55) (78) (79) (61) Harvest Valve Control High Pressure Board (77) Cutout (80) (88) (60) Dump Valve (76) (81) Water Pump (98) (57) (99)
  • Page 85 Section 6 Electrical System S1400/S1600/S1800 - SELF-CONTAINED - 1 PHASE WATER VALVE L2 OR N (21) (20) (22) LH HARVEST (89) (55) SOLENOID (61) (77) (87) CONTROL BOARD (88) HIGH PRESSURE CUTOUT (99) RH HARVEST (80) (60) (88) SOLENOID (76) (81) DUMP SOLENOID...
  • Page 86 Electrical System Section 6 S1400/S1600/S1800 - SELF-CONTAINED - 3 PHASE WATER VALVE (21) (20) (22) LH HARVEST SOLENOID (77) (61) (87) (55) (89) (99) (88) CONTROL BOARD HIGH PRESSURE RH HARVEST (80) (60) CUTOUT SOLENOID (88) (76) (81) DUMP SOLENOID (57) (98) WATER...
  • Page 87 Section 6 Electrical System S1400/S1600/S1800 - REMOTE - 1 PHASE WATER VALVE (21) (22) (20) L2 OR N (82) SOLENOID (55) (89) (78) (79) RH HARVEST HIGH PRESSURE SOLENOID (61) CUTOUT (87) CONTROL BOARD (88) (77) (88) (60) (80) LH HARVEST SOLENOID (76) (81)

  • Page 88: Part Number

    Electrical System Section 6 S1400/S1600/S1800 - REMOTE - 3 PHASE WATER VALVE (21) (22) (20) (82) SOLENOID (79) (78) (89) (55) RH HARVEST SOLENOID (87) (88) HIGH PRESSURE CUTOUT (61) (88) CONTROL BOARD (77) (80) LH HARVEST SOLENOID (60) (76) DUMP (81) SOLENOID...
  • Page 89 Disconnect electrical power to the entire ice machine before proceeding. Important The water curtain must be ON (bin switch(s) closed) 2. Remove the fuse. Check the resistance across the to start ice making. fuse with an ohm meter.
  • Page 90 Electrical System Section 6 Symptoms Water Curtain Removal Notes Bin Switch Fails Open The water curtain must be on (bin switch closed) to start ice making. While a freeze cycle is in progress, the water • The ice machine will not start with the toggle switch curtain can be removed and installed at any time without in the ice position, but runs normally with the toggle interfering with the electrical control sequence.

  • Page 91: Compressor Electrical Diagnostics

    S and R, and open readings COMPRESSOR DRAWING HIGH AMPS between C and S and between C and R. Allow the compressor to cool, then check the readings again. The continuous amperage draw on start-up should not...

  • Page 92: Ptcr Diagnostics

    (virtually stop) large currents at line voltages. 2. When starting the compressor, the contactor closes PTCR’s have been used for many years in millions of and the PTCR, which is at a low resistance value, HVAC applications. In place of using the conventional...
  • Page 93 A good PTCR may be too hot to operate properly at CONTACTOR RUN CAPACITOR start-up because: CONTACTS • The ice machine’s 3-minute delay has been overridden. Opening and closing the service COMPRESSOR disconnect or cycling the toggle switch from OFF to ICE will override the delay period. •...
  • Page 94 The voltage at the compressor during start-up is too S850/S1000 8504993 305C19 18-40 Ohms low. S1200/S1400 Manitowoc ice machines are rated at ±10% of 8504913 305C9 8-22 Ohms S1600/S1800 nameplate voltage at compressor start-up. (Ex: An ice machine rated at 208-230 should have a compressor start-up voltage between 187 and 253 volts.)

  • Page 95: Diagnosing Start Components

    Section 6 Electrical System DIAGNOSING START COMPONENTS HARVEST ASSIST AIR COMPRESSOR If the compressor attempts to start, or hums and trips the Function overload protector, check the start components before The air compressor breaks the vacuum between the replacing the compressor. sheet of ice and the evaporator which results in shorter Capacitor harvest cycles.

  • Page 96: Ice/Off/Clean Toggle Switch

    Electrical System Section 6 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 97: Electronic Control Board

    Section 6 Electrical System ELECTRONIC CONTROL BOARD N 115V L2 208-230V PRIMARY POWER SUPPLY AC LINE VOLTAGE ELECTRICAL PLUG (NUMBERS MARKED ON WIRES) MAIN FUSE (7A) AIR COMPRESSOR (NOT USED ON ALL MODELS) WATER PURGE CLEAN LIGHT (YELLOW) ADJUSTMENT LEFT BIN LIGHT (GREEN) RIGHT BIN LIGHT (GREEN) REMOTE BIN LIGHT (GREEN) WATER PROBE LIGHT (GREEN)
  • Page 98 Electrical System Section 6 General Inputs S-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.
  • Page 99 1/8” ICE BRIDGE THICKNESS Ice Thickness Probe ICE PROBE LIGHT SV3132 This light’s primary function is to be on as water contacts the ice thickness probe during the freeze cycle, and Ice Thickness Check remain on throughout the entire harvest cycle. The light Make sure the ice thickness probe wire and the bracket will flicker as water splashes on the probe.
  • Page 100 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. Step 2 Wait until the water starts to flow over the evaporator (freeze cycle).
  • Page 101 Section 6 Electrical System 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 102 Electrical System Section 6 DIAGNOSING WATER LEVEL CONTROL CIRCUITRY Problem: Water Trough Overfilling During The Step 2 Wait until the freeze cycle starts Freeze Cycle (the freeze cycle starts when the water pump energizes). Step 1 Start a new freeze sequence by moving the ICE/ Step 3 Disconnect water level probe wire from control OFF/CLEAN toggle switch to OFF, then back to ICE.
  • Page 103 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). Step 1 Verify water is supplied to the ice machine, and then start a new freeze sequence by moving the ICE/ Step 3 Disconnect the water level probe from the water OFF/CLEAN toggle switch to OFF then back to ICE.
  • Page 104 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 105 Section 6 Electrical System S1000 - SELF CONTAINED - 1 PHASE WITH TERMINAL BOARD SV2071 6-45 Part Number 80-1480-3...
  • Page 106 Electrical System Section 6 THIS PAGE INTENTIONALLY LEFT BLANK 6-46 Part Number 80-1480-3...

  • Page 107: Self-Contained Air Or Water -Cooled Models

    Section 7 Refrigeration System Section 7 Refrigeration System Sequence of Operation SELF-CONTAINED AIR OR WATER -COOLED MODELS EVAPORATOR HEAT EXCHANGER EXPANSION VALVE HOT GAS SOLENOID VALVE AIR OR WATER COMPRESSOR STRAINER CONDENSER DRIER RECEIVER (WATER COOLED ONLY) HIGH PRESSURE VAPOR HIGH PRESSURE LIQUID LOW PRESSURE LIQUID LOW PRESSURE VAPOR...
  • Page 108 E X P A N S I O N V A L V E H O T G A S S O L E N O I D V A L V E C O M P R E S S O R...
  • Page 109 Section 7 Refrigeration System REMOTE MODELS EVAPORATOR HEAT EXCHANGER EXPANSION VALVE STRAINER COMPRESSOR HOT GAS 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...
  • Page 110 Refrigeration System Section 7 EVAPORATOR HEAT EXCHANGER EXPANSION VALVE STRAINER COMPRESSOR HOT GAS 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...
  • Page 111 Section 7 Refrigeration System EVAPORATOR HEAT EXCHANGER EXPANSION VALVE STRAINER COMPRESSOR HOT GAS 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 LIQUID/VAPOR EQUALIZED TO AMBIENT CONDITIONS SV1568...
  • Page 112 Refrigeration System Section 7 S1400/S1600/S1800 SELF-CONTAINED TUBING SCHEMATIC HEAT EXCHANGER EXPANSION VALVE EXPANSION VALVE EVAPORATOR HARVEST HARVEST SOLENOID VALVE SOLENOID VALVE COMPRESSOR STRAINER DRIER RECEIVER AIR OR WATER COOLED CONDENSER NOTE: The refrigeration sequence for self-contained dual expansion valve ice machines is identical to self- contained single expansion valve ice machines.
  • Page 113 Section 7 Refrigeration System S1400/S1600/S1800 REMOTE TUBING SCHEMATIC HEAT EXCHANGER EXPANSION VALVE EXPANSION VALVE EVAPORATOR HARVEST HARVEST LLSV SOLENOID VALVE SOLENOID VALVE COMPRESSOR STRAINER DRIER CHECK VALVE HPR VALVE CHECK VALVE REMOTE HEAD CONDENSER PRESSURE CONTROL VALVE RECEIVER NOTE: The refrigeration sequence for remote dual expansion valve ice machines is identical to remote single expansion valve ice machines.

  • Page 114: Operational Analysis (Diagnostics)

    The following two examples illustrate how similar symptoms can result in a misdiagnosis. The service technician’s failure to check the ice machine for a low charge condition resulted in a 1. An expansion valve bulb that is not securely...

  • Page 115: Before Beginning Service

    • another ice machine is required. • more storage capacity is required. • relocating the existing equipment to lower the load conditions is required. Contact the local Manitowoc distributor for information on available options and accessories. Part Number 80-1480-3...

  • Page 116: 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. Condenser is dirty Clean the condenser Water system problems must be identified and Water filtration is plugged (if...

  • Page 117: Ice Formation Pattern

    However, when evaporator, but ice forms at the inlet half of the this analysis is used along with Manitowoc’s evaporator. Or, the ice at the outlet of the evaporator Refrigeration System Operational Analysis Table, it can reaches 1/8"...
  • Page 118 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 at The ice machine operates for an extended period, but the inlet of the evaporator. Examples: The ice at the there is no ice formation at all on the evaporator.

  • Page 119: Safety Limits

    Eliminate all electrical components and external causes first. If it appears that the refrigeration 1. Move the toggle switch to OFF. system is causing the problem, use Manitowoc’s 2. Move the toggle switch back to ICE. Refrigeration System Operational Analysis Table, along 3.
  • Page 120 High water temperature (90°F/32.2°C max.) Dirty/defective water regulating valve Water regulating valve out of adjustment Refrigeration system Improper refrigerant charge Non-Manitowoc components Defective head pressure control (remotes) Defective harvest valve Defective compressor TXV starving or flooding (check bulb mounting) Non-condensables in refrigeration system...
  • Page 121 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 122: Analyzing Discharge Pressure During Freeze Or Harvest Cycle

    Use the operating conditions determined in step 1 to pressure falls within the published pressure range for the find the published normal discharge pressures. ice machine’s operating conditions. Freeze Cycle _______ Harvest Cycle _______ Freeze Cycle Discharge Pressure High Checklist...

  • Page 123: Analyzing Suction Pressure During Freeze Cycle

    Section 7 Refrigeration System 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 124 (See “Freeze Cycle Discharge Pressure High Checklist” ) 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 125: Single Expansion Valve Ice Machines

    However, comparing these temperatures Important during the freeze cycle, along with using Manitowoc’s Do not simply insert the sensing device under the Refrigeration System Operational Analysis Table, can insulation. It must be attached to and reading the help diagnose an ice machine malfunction.

  • Page 126: Harvest Valve Temperature Check

    1. Wait five minutes into the freeze cycle. 2. Feel the inlet of the harvest valve(s). Important Feeling the harvest valve outlet or across the harvest valve itself will not work for this comparison. The harvest valve outlet is on the suction side (cool refrigerant).

  • Page 127: Discharge Line Temperature Analysis

    Section 7 Refrigeration System 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 128: How To Use The Refrigeration System Operational Analysis Tables

    On dual expansion valve ice machines, change only the TXV that is starving. If both TXV’s are starving, While analyzing each item separately, you may find an they are probably good and they are being affected “external problem”...

  • Page 129: Refrigeration System Operational Analysis Tables

    Refrigeration System REFRIGERATION SYSTEM OPERATIONAL ANALYSIS TABLES S Models Single Expansion Valve - Ice Machine Model Number_________________ 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 130: Refrigeration System Operational Analysis Tables

    Section 7 REFRIGERATION SYSTEM OPERATIONAL ANALYSIS TABLES S Models Dual Expansion Valve - Ice Machine Model Number_________________ 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 131: Harvest Pressure Regulating

    Section 7 Refrigeration System HARVEST PRESSURE REGULATING FREEZE CYCLE (H.P.R.) SYSTEM The H.P.R. system is not used during the freeze cycle. Remotes Only The H.P.R. solenoid is closed (de-energized), preventing refrigerant flow into the H.P.R. valve. GENERAL HARVEST CYCLE The harvest pressure regulating (H.P.R.) system includes: During the harvest cycle, the check valve in the discharge line prevents refrigerant in the remote...
  • Page 132 Refrigeration System Section 7 HPR DIAGNOSTICS 5. Freeze cycle Head Pressure 220 psig (1517 kPa) or higher? Steps 1 through 4 can be quickly verified without attaching a manifold gauge set or thermometer. If the head pressure is lower than 220 psig (1517 kPa) refer to headmaster diagnostics.

  • Page 133: Headmaster Control Valve

    At temperatures below this (or at higher temperatures if it is raining), the head 4. Using the information gathered, refer to the chart pressure control dome’s nitrogen charge closes the below. condenser port and opens the bypass port from the NOTE: A headmaster that will not bypass, will function compressor discharge line.
  • Page 134 Refrigeration System Section 7 FAN CYCLE CONTROL VS. HEADMASTER A fan cycle control cannot be used in place of a headmaster. The fan cycle control is not capable of bypassing the condenser coil and keeping the liquid line temperature and pressure up. This is very apparent when it rains or the outside temperature drops.

  • Page 135: Pressure Control Specifications And Diagnostics

    Section 7 Refrigeration System 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 136: Cycle Time/24 Hour Ice Production/Refrigerant Pressure Charts

    Refrigeration System 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 “OPERATIONAL ANALYSIS TABLE” for the list of data that must be collected for refrigeration diagnostics.

  • Page 137: S300 Series

    Section 7 Refrigeration System S300 SERIES S300 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 138: S320 Series

    Refrigeration System Section 7 S320 SERIES S320 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 139: S420 Series

    Section 7 Refrigeration System S420 SERIES S420 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 140: S450 Series

    Refrigeration System Section 7 S450 SERIES S450 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 141: S500 Series

    Section 7 Refrigeration System S500 SERIES S500 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 142: S600 Series

    Refrigeration System Section 7 S500 SERIES S600 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 143 Section 7 Refrigeration System S600 SERIES S600 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 144: S850 Series

    Refrigeration System Section 7 S850 SERIES S850 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 145: S1000 Series

    Section 7 Refrigeration System S850 SERIES S1000 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 146 Refrigeration System Section 7 S1000 SERIES S1000 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 147 Section 7 Refrigeration System S1200 SERIES S1200 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: S1400 Series

    Refrigeration System Section 7 S1400 SERIES S1400 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 Section 7 Refrigeration System S1400 SERIES S1600 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 150 Refrigeration System Section 7 S1600 SERIES S1600 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 151: S1800 Series

    Section 7 Refrigeration System S1800 SERIES S1800 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 152 Refrigeration System Section 7 S1800 SERIES Remote NOTE: These characteristics may vary depending on operating conditions. Cycle Times Freeze Time + Harvest Time = Total Cycle Time Air Temp. Freeze Time Entering Harvest Water Temperature °F/°C Condenser Time 50/10.0 70/21.1 90/32.2 °F/°C -20/-28.9 to...

  • Page 153: Refrigerant Recovery/Evacuation And Recharging

    CONNECTIONS Manifold gauge sets must utilize low loss fittings to VACUUM PUMP/ RECOVERY UNIT comply with U.S. Government rules and regulations. OPEN Make these connections: CLOSED 1. Suction side of the compressor through the suction service valve.
  • Page 154 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 155: 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 156 Refrigeration System Section 7 EVAPORATOR HEAT EXCHANGER EXPANSION VALVE SOLENOID VALVES LOW SIDE SERVICE VALVE (BACKSEATED) COMPRESSOR STRAINER HARVEST PRESSURE HARVEST CHECK SOLENOID PRESSURE VALVE VALVE REGULATING VALVE HIGH SIDE LIQUID SERVICE VALVE LINE (BACKSEATED) SOLENOID DISCHARGE LINE QUICK CONNECT DRIER SCHRAEDER FITTING REMOTE CONDENSER...
  • Page 157 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 158 Refrigeration System Section 7 HEAT EXCHANGER EVAPORATOR EXPANSION VALVE SOLENOID VALVES LOW SIDE SERVICE VALVE (BACKSEATED) STRAINER COMPRESSOR HARVEST PRESSURE HARVEST SOLENOID CHECK PRESSURE VALVE VALVE REGULATING VALVE HIGH SIDE LIQUID SERVICE VALVE LINE (BACKSEATED) SOLENOID DISCHARGE LINE DRIER QUICK CONNECT SCHRAEDER FITTING REMOTE CONDENSER RECEIVER...

  • Page 159: 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 160 Important This will prevent CFC release. Refrigerant sweeps are not recommended, as they release CFC’s into the atmosphere. 4. Follow the normal evacuation procedure, except replace the evacuation step with the following: 6. Install a new compressor and new start components.

  • Page 161: Replacing Pressure Controls Without Removing Refrigerant Charge

    1. Disconnect power to the ice machine. pump for 1/2 hour on self-contained models, 1 hour on remotes. 2. Follow all manufacturer’s instructions supplied with the pinch-off tool. Position the pinch-off tool around NOTE: You may perform a standing vacuum test to the tubing as far from the pressure control as make a preliminary leak check.
  • Page 162 Refrigeration System Section 7 SV1406 Figure 7-17. Using Pinch-Off Tool 7-56 Part Number 80-1480-3...

  • Page 163: Filter-Driers

    The filter-driers used on Manitowoc ice machines are Listed below are the recommended O.E.M. field manufactured to Manitowoc specifications. replacement driers: The difference between Manitowoc driers and off-the- shelf driers is in filtration. Manitowoc driers have dirt- Drier Part Model Connection...

  • Page 164: Total System Refrigerant Charges

    Refrigeration System Section 7 TOTAL SYSTEM REFRIGERANT CHARGES Additional Refrigerant Charges For line sets between 50’ - 100’. Important Refrigerant Maximum This information is for reference only. Refer to the Nameplate to be added Series System Charge ice machine serial number tag to verify the system Charge for 50’...

  • Page 165: Refrigerant Definitions

    Section 7 Refrigeration System 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 166: Refrigerant Re-Use Policy

    Refrigeration System Section 7 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 167: Hfc Refrigerant Questions And Answers

    Refrigeration System HFC REFRIGERANT QUESTIONS AND ANSWERS Manitowoc uses R-404A and R-134A HFC refrigerants with ozone depletion potential (ODP) factors of zero (0.0). R- 404A is used in ice machines and reach-in freezers and R-134A is used in reach-in refrigerators.
  • Page 168 Refrigeration System Section 7 THIS PAGE INTENTIONALLY LEFT BLANK 7-62 Part Number 80-1480-3...

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