Manitowoc QD0872C, CVD0675, QY0874C, CVD0875, QR1070C Technician Manual

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Technician’s

Handbook

Manitowoc

This manual is updated as new information and models are

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www.manitowocice.com

America’s #1 Selling Ice Machine

Q Model

QuietQube

Ice Machines

Part Number 80-0099-9 6/11

Safety Notices

As you work on Manitowoc equipment, be sure to pay close attention to the safety notices in this handbook. Disregarding the notices may lead to serious injury and/or damage to the equipment.

Throughout this handbook, you will see the following types of safety notices:

Procedural Notices

As you work on Manitowoc equipment, be sure to read the procedural notices in this handbook. These notices supply helpful information which may assist you as you work.

Throughout this handbook, you will see the following types of procedural notices:

Warning

Text in a Warning box alerts you to a potential personal injury situation. Be sure to read the Warning statement before proceeding, and work carefully.

Caution

Text in a Caution box alerts you to a situation in which you could damage the equ ipment. Be sure to read the Caution statement before proceeding, and work carefully.

Important

Text in an Important box provides you with information that may help you perform a procedure more efficiently. Disregarding this information will not cause damage or injury, bu t it may slow you down as you work.

NOTE: Text set off as a Note provides you with simple, but useful, extra information about the procedure you are performing.

Read These Before Proceeding:

Caution

Proper installation, care and maintenance are essential for maximum performance and troublefree operation of your Manitowoc equipment. If you encounter problems not covered by this handbook, do not proceed, contact Manitowoc Foodservice Group. We will be happy to provide assistance.

Important

Routine adjustments and maintenance procedures outlined in this handbook are not covered by the warranty.

! Warning

PERSONAL INJURY POTENTIAL

Do not operate equipment that has been misused, abused, neglected, damaged, or altered/modified from that of original manufactured specifications.

We reserve the right to make prod uct

improvements at any time. Specifications and

design are subject to change without notice.

Table of Contents

Model Numbers

Model/Serial Number Location....................... ... ... .2

Ice Machine Warranty Information

Owner Warranty Registration Card....................... 3

Warranty Coverage............................................... 4

General .............................................................4

Parts................................................................. 4

Labor................................................................ 4

Exclusions ........................................................4

Authorized Warranty Service............................ 5

Service Calls........................................... .......... 5

Installation

Location of Ice Machine........................................ 6

Ice Machine Head Section 

Clearance Requirements ...................................... 6

Q0600C/Q0800C/Q1000C............................... 6

SU1000/SerVend UC-300:............................... 6

Stacking Two Ice Machines on a 

Single Storage Bin ................................................ 7

Ice Deflector..........................................................7

Location of CVD

Condensing Unit....................... 8

Condensing Unit Clearance Requirements........... 8

Ice Machine Head Section Water 

Supply and Drains................................................. 9

Potable Water Supply.......................................9

Potable Water Inlet Lines................................. 9

Drain Connections..........................................10

Water cooled condenser water 

supply and drains................................................ 11

Condenser Water Supply ............................... 11

Water Cooled Condenser Lines ..................... 11

Condensing Unit Drain Connections .............. 12

Electrical Requirements.......................................13

QuietQube® Ice Machines and 

CVD® Condensing Units................................13

3 Phase Scroll Compressor Rotation..............13

Refrigeration System Installation........................ .15

Usage With Non-Manitowoc 

Condensing Units ...........................................15

Factory Equipment Refrigerant Amounts........ 16

Refrigeration Line Set Installation...................17

3 Phase Scroll Compressor Rotation 

CVD2075 Only ..................................... ...............29

Condensing Unit Heat of Rejection .....................29

Operational Checks

General................................................................30

Water Level .........................................................30

Q0600C/Q0800C/Q1000C/QDUAL................30

Q1400C/SU1000C.........................................31

Ice Thickness Check ...........................................32

Harvest Sequence Water Purge..........................33

Interior Cleaning and Sanitizing

AlphaSanÒ..........................................................36

Cleaning Procedure.............................................37

Sanitizing Procedure ..................................... .. ... .39

Automatic Cleaning System (AuCS®) Accessory

........................................................................41

Removal of Parts for Cleaning or Sanitizing... 43

Removal from Service/Winterization

General................................................................63

CVD1476 Water Cooled Condensing Unit .......... 64

AuCS® Accessory...............................................64

Component Identification

Ice Machine Head Section .................................. 65

Q0600C/Q0800C/Q1000C.............................65

SU1000C/SerVend UC-300 Dispenser .......... 67

Q1400C.......................................................... 68

QDUAL........................................................... 69

CVD

Condensing Unit ....................................... 70

CVD0675/CVD0875/CVD1075/CVD1475...... 70

CVD1476........................................................71

CVD1875/CVD2075 ....................................... 72

Ice Making Sequence of Operation

Q0600C/Q0800C/Q1000C/SU1000C ................. 73

Initial Start-Up or Start-Up After 

Automatic Shut-Off......................................... 73

Freeze Sequence........................................... 74

Harvest Sequence.......................................... 75

Automatic Shut-Off......................................... 76

Q1400C...............................................................79

Initial Start-Up or Start-Up After Automatic Shut-

Off...................................................................79

Freeze Sequence........................................... 79

Harvest Sequence.......................................... 80

QDUAL................................................................84

Initial Start-Up or Start-Up After Automatic Shut-

Off...................................................................84

Freeze Sequence........................................... 85

Harvest Sequence.......................................... 86

Electrical System

Component Specifications and Diagnostics Control

Board...................................................................91

Harvest/Safety Limit Light...............................91

Freeze Time Lock-In Feature.........................91

Maximum Freeze Time...................................91

Safety Limits...................................................9 1

Three-Minute Delay........................................92

Inputs..............................................................92

Control Board Relays......................................92

Main Fuse....................... .. ... ............................ ....95

Function..........................................................95

Specifications..................................................95

Check Procedure............................................95

Bin Switch.................... ... ............................ .........96

Function..........................................................96

Specifications..................................................96

Check Procedure............................................97

Ohm Test........................................................97

Water Curtain Removal Notes........................98

ICE/OFF/CLEAN Toggle Switch..........................99

Function..........................................................99

Specifications..................................................99

Check Procedure............................................99

Ice Thickness Probe (Harvest Initiation)............100

How the Probe Works...................................100

Ice Thickness Check.....................................100

Ice Thickness Probe Diagnostics..................101

Diagnosing Ice Thickness Control Circuitry..102

Water Level Control Circuitry.............................105

Diagnosing an Ice Machine Head Section 

that Will Not Run .................................. ... ... .......112

Diagnosing a Condensing Unit 

that Will Not Run .................................. ... ... .......113

Compressor Electrical Diagnostics....................114

Diagnosing Start Components...........................116

Electrical Diagrams.......................................... ..117

Ice Machine Head Section............................117

Condensing Unit...........................................121

Refrigeration System

Refrigeration System Diagnostics..................... 123

General ......................................................... 123

Refrigeration System Operation................... 123

Ice Machine will Not Harvest Diagnostics ......... 127

Harvest Cycle Diagnostic List....................... 127

Ice Production Check........................................128

Installation/Visual Inspection Checklist......... 129

Water System Checklist............................... 130

Ice Formation Pattern................................... 131

Evaporator Tubing Routing........................... 131

Safety Limits................................................. 134

Analyzing Suction Pressure................. ... ... ...142

Cool Vapor Valve..............................................146

Normal Operation.........................................146

Cool Vapor Valve Analysis. .......................... 147

Freeze Cycle Suction Line Temperature Analysis

.....................................................................148

Refrigeration Component Diagnostic Charts..... 150

General ......................................................... 150

Procedure..................................................... 150

Final Analysis ............................................... 150

Refrigeration Component Diagnostic Charts..... 152

Single Expansion Valve – Q0600C/0800C/

Q1000C/SU1000C........................................152

Dual Expansion Valve – Q1400C/QDUAL.... 157

Pressure Control Specifications 

and Diagnostics.................................................160

Headmaster Control Valve ........................... 160

Water Regulating Valve................................170

Fan Cycle Control.........................................171

High Pressure Cutout (HPCO) Control......... 172

Low Pressure Cutout (LPCO) Control.......... 173

QuietQube

Tubing Schematics........................ 174

Q0600C/Q0800C/Q1000C...........................174

Q1400C/QDUALC........................................175

Cycle Times/24-Hour Ice Production/Refrigerant Pressure Charts

Q0600C/CVD675 Series Remote Air Cooled....177

Q0800C/CVD875 Series Remote Air Cooled....178

Q1000C/CVD1075 Series Remote Air Cooled..179 SU1000C/SerVend UC-300 Dispenser/CVD1075

Remote Air Cooled........... .................................180

Q1400C/CVD1475 Series Remote Air Cooled..181

Q1400C/CVD1476 Remote water Cooled.........182

QDUAL/CVD1875 Remote Air Cooled..............183

QDUAL/CVD2075 Remote air Cooled...............184

Refrigerant Recovery/Evacuation

System Contamination Cleanup........................188

General.........................................................188

Determining Severity of Contamination........188

Cleanup Procedure .......................................190

Replacing Pressure Controls Without Removing

Refrigerant Charge............................................193

Filter-Driers........................................................195

Liquid Line Filter-Drier ..................................195

Suction Line Filter.........................................196

Total System Refrigerant Charge......................197

Refrigerant Oil...................................................198

Refrigerant Definitions.......................................199

Refrigerant Reuse Policy...................................200

–1–

Model Numbers

This manual cover s the fol lowing models:

Ice Machine Head

Section

CVD® Condensing

Unit*

QR0670C QD0672C QY0674C

CVD0675

QR0870C QD0872C QY0874C

CVD0875

QR1070C QD1072C QY1074C

CVD1075 CVD1285

SU1024YC/SerVend

UC-300 Dispenser

CVD1075

QR1470C QD1472C QY1474C

CVD1375 CVD1475 CVD1476

QRDUALC QDDUALC QYDUALC

CVD1875 CVD2075

*For 3 phase electrical option: add the number “3” 

to end of model number (CVD10753).

Important

The ice machine sequence of operation for QuietQube

Ice Machines will differ. Verify the correct sequence of operation is being followe d for the model you are working on.

–2–

MODEL/SERIAL NUMBER LOCATION

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

Warning

Manitowoc QuietQube® Ice Machines require the ice storage bin to incorporate an ice deflector, when installing with non-Manitowoc ice storage systems or Manitowoc F style bins.

Prior to using a non-Manitowoc ice storage system with Manitowoc ice machines, contact the manufacturer to assure their ice deflector is compatible with Manitowoc ice machines.

–3–

Ice Machine Warranty Information

OWNER WARRANTY REGISTRATION CARD

Warranty coverage begins the day the ice machine is installed.

If the OWNER WARRANTY REGISTRATION CARD is not returned, Manitowoc will use the date of sale to the Manitowoc Distributor as the first day of warranty coverage for your new ice machine.

Important

Complete and mail the OWNER WARRANTY REGISTRAT ION CARD as soon as possib le to validate the installation date.

–4–

WARRANTY COVERAGE General

The following Warranty outline is provided for your convenience. For a detailed explanation, read the warranty bond shipped with each product.

Contact your local Manitowoc representative or Manitowoc Ice, Inc. if you need further warranty information.

Parts

1. Manitowoc warrants the ice machine against defects in materials and workmanship, under normal use and service for three (3) years from the date of original installation.

2. The evaporator and compressor are covered by an additional two (2) year (five years total) warranty beginning on the date of the original installation.

Labor

1. Labor required to repair or replace defective components is covered for three (3) years from the date of original installation.

2. The evaporator is covered by an additional  two (2) year (five years total) labor warranty beginning on the date of the original installation.

Exclusions

The following items are not included in the ice machine’s warranty coverage:

1. Normal maintenance, adjustments and cleaning as outlined in this manual.

2. Repairs due to unauthorized modifications to the ice machine or use of non-standard parts without prior written approval from Manitowoc Ice, Inc.

Important

This product is intended exclusively for commercial application. No warranty is extended for personal, family, or household purposes.

–5–

3. Damage caused by improper installation of the ice machine, electrical supply, water supply or drainage, or damage caused by floods, storms, or other acts of God.

4. Premium labor rates due to holidays, overtime, etc.; travel time; flat rate service call charges; mileage and miscellaneous tools and material charges not listed on the payment schedule. Additional labor charges resulting from the inaccessibility of equipment are also excluded.

5. Parts or assemblies subjected to misuse, abuse, neglect or accidents.

6. Damage or problems caused by installation, cleaning and/or maintenance procedures inconsistent with the technical instructions provided in this manual.

This product is intended exclusively for commercial application. No warranty is extended for personal, family, or household purposes.

Authorized Warranty Service

To comply with the provisions of the warranty, a refrigeration service company qualified and authorized by your Manitowoc Distributor, or a Contracted Service Representative must perform the warranty repair.

NOTE: If the dealer you purchased th e i ce ma chi ne from is not authorized to perform warranty service, contact your Manitowoc Distributor or Manitowoc Ice, Inc. for the name of the nearest authorized service representative.

Service Calls

Normal maintenance, adjustments and cleaning as outlined in this manual are not covered by the warranty. If you have followed the procedures listed in this manual, and the ice machine still does not perform properly, call your Local Distribu to r or the Service Department at Manitowoc Ice, Inc.

–6–

Installation

LOCATION OF ICE MACHINE

The location selected for the ice machine head section must meet the following criteria. If any of these criteria are not met, select another location.

 The location must be free of airborne and other

contaminants.

 The air temperature must be at least 35°F (1.6°C),

but must not exceed 110°F (43.4 °C) .

 The location must not be near heat-generating

equipment or in direct sunlight.

ICE MACHINE HEAD SECTION CLEARANCE REQUIREMENTS

Q0600C/Q0800C/Q1000C Top/Sides

There is no minimum clearance required, although 5 in. (127 mm) is recommended for efficient operation and servicing only .

Back

1 in. (25 mm) required when routing electrical inlet, water inlet and refrigeration tubing out of the top of the unit.

5 in. (127 mm) required when routing all connections out the back.

SU1000/SerVend UC-300: Top

40 in. (100 mm) required for cleaning procedures and servicing.

Back

12 in. (30.5cm) required for cleaning procedures and servicing.

–7–

STACKING TWO ICE MACHINES ON A  SINGLE STORAGE BIN

Q0600C/Q0800C/Q1000C Ice Machines: A stacking kit is required for stacking two ice machines. Installation instructions are supplied with the stacking kit.

Q1400C/QDUAL Ice Machines:  Q1400C and QDUAL ice machines cannot be stacked. However two Q1400C/QDUAL ice machines can be placed side by side on a 60 in. Manitowoc F style bin.

ICE DEFLECTOR

QDUAL ice machines mounted on an ice dispenser do not require an ice deflector.

QDUAL ice machines mounted on an ice storage bin (Manitowoc or non-Manitowoc) require the use of an ice deflector. Refer to sales literature to determine the proper kit for your application. This kit is necessary to allow access to the shut-off valves during installation and will improve access during future service.

An ice deflector is required for all ice machines installed on a bin.

–8–

LOCATION OF CVD® CONDENSING UNIT

The location selected for the CVD® Condensing Unit must meet the following criteria. If any of these criteria are not met, select another location.

 The air temperature must be at least -20°F

(-28.9°C), but must not exceed 130°F (54.4°C)



-20°F (-28.9°C) to 120°F (54.4°C) QDUAL CVD1875/CVD2075).

 CVD1476 only - The air temperature must be at

least 50°F (10°C) but must not exceed 110°F (43°C).

 The location must not allow exhaust fan heat and/or

grease to enter the condenser.

 The location must not obstruct airflo w through or

around the condensing unit.

CONDENSING UNIT CLEARANCE REQUIREMENTS

Top/Sides

There is no minimum clearance required, although 6 in. (152 mm) is recommended for efficient operation and servicing only .

Front/Back

4 ft. (122 cm)

–9–

ICE MACHINE HEAD SECTION WATER  SUPPLY AND DRAINS

Potable Water Supply

Local water conditions may require treatment of the water to inhibit scale formation, filter sediment, and remove chlorine odor and taste.

Potable Water Inlet Lines

Follow these guidelines to install water inlet lines:  Do not connect the ice machine to a hot water

supply. Be sure all hot water restrictors installed for other equipment are working. (Check valves on sink faucets, dishwashers, etc.)

 If water pressure exceeds the maximum

recommended pressure obtain a water pressure regulator from your Manitowoc Distributor.

Float Valve - 80 psi (551.5 kPa) Water Inlet Valve - 90 psi (620.4 kPA)

 Install a water shut-off valve for ice making potable

water.

 Insulate water inlet lines to prevent condensation.

Important

If you are installing a Manitowoc water filter system, refer to the Installation Instructions supplied with the filter system for ice making water inlet connections.

–10–

Drain Connections

Follow these guidelines when installing drain lines to prevent drain water from flowing back into the ice machine and storage bin:

 Drain lines must have a 1.5 in. drop per 5 ft. of run

(2.5 cm per meter), and must not create traps.

 The floor drain must be large enough to

accommodate drainage from all drains.

 Run separate bin and ice machine drain lines.

Insulate them to prevent condensation.

 Vent the bin and ice machine drain to the

atmosphere.

 Drains must have a union or other suitable means of

disconnection from the ice machine when servicing is required.

 The SU1024YC is designed for installation on a

SerVend UC-300 dispenser only. Refer to the SerV end UC-300 Installation, Use and Care Manual for additional drain requirements.

–11–

WATER COOLED CONDENSER WATER  SUPPLY AND DRAINS

Condenser Water Supply

Local water conditions may require treatment of the water to inhibit scale formation to filter sediment.

Water Cooled Condenser Lines

Follow these guidelines to install water lines:  Contact your distributor if your water pressure is

greater than 150 psi (1034kPA). A special order condensing unit is available that allows water pressure up to 350 psi (2413 kPA).

 Install a shutoff valve (inlet and outlet on cooling

tower or closed loop circuits) to allow isolation of the water system.

 Water entering the condenser must not exceed 90°F

(32.2°C).

 Water flow through the condenser must not exceed

5 gallons (19 liters) per minute.

 Allow for a pressure drop of 8 psi (55 kPA) between

the condenser water inlet and outlet.

 Water exiting the condenser must not exceed 1 10°F

(43.3°C)

Warning

Water pressure at the condenser cannot exceed 150 psig (1034kPA) with the standard water regulating valve. Contact your distributor if your water pressure is greater than 150 psig (1034 kPA). A special order condensing unit is available that allows water pressure up to 350 psig (2413 kPA).

–12–

Condensing Unit Drain Connections

The condensing unit drain is provided to remove any condensate produced by the suction accumulator. Condensate amounts will vary depending on temperature and humidity.

 The condensing unit must be level front to back and

side to side to allow the condensate to drain.

 Drain lines must have1.5-inch drop per 5 feet of run

(2.5 cm per meter), and must not create traps.

 Drain termination must meet applicable codes.

–13–

ELECTRICAL REQUIREMENTS QuietQube® Ice Machines and 

CVD® Condensing Units

3 Phase Scroll Compressor Rotation

CVD2075 3 PHASE ONLY A trained and qualified technician must verify

compressor rotation at equipment startup or compressor warranty will be void. Incorrect rotation of a scroll compressor can be identified by:

 Noisy compressor operation  Elevated suction pressure  Low discharge pressure  Compressor trips on overload protector

To change compressor rotation, reverse (exchange locations) any two incoming power supply leads.

Ice Machine Head Section

Voltage

Phase

Cycle

Max. Fuse/

Circuit

Breaker

Total

Amps

Q0600C Q0800C Q1000C

SU1000C

Q1400C

QDUAL

115/1/60 230/1/50

15 amp 15 amp

1.1

0.6

Important

The QuietQube® Ice Machine Head Section and CVD

Condensing Unit are wired independently

from each other.

–14–

CVD® Condensing Unit

Voltage

Phase

Cycle

Max. Fuse/

Circuit

Breaker

Min.

Circuit

Amps

CVD0675

208-230/1/60 208-230/3/60

230/1/50

15 amp 15 amp 15 amp

9.6

7.3

9.0

CVD0875

208-230/1/60 208-230/3/60

230/1/50

20 amp 15 amp 20 amp

11.7

8.2

11.3

CVD1075

208-230/1/60 208-230/3/60

230/1/50

25 amp 20 amp 25 amp

15.6

10.6

13.8

CVD1475

208-230/1/60 208-230/3/60

230/1/50

35 amp 25 amp 35 amp

19.6

14.1

19.8

CVD1476

208-230/1/60 208-230/3/60

30 amp 20 amp

15.3

10.8

CVD1875

208-230/1/60 208-230/3/60

230/1/50

40 amp 30 amp 40 amp

21.1

11.0

23.2

CVD2075

208-230/1/60 208-230/3/60

230/1/50

50 amp 40 amp 50 amp

27.1

19.9

29.9

Caution

Scroll Compressor Rotation

(CVD2075 3 Phase Only)

Correct compressor rotation must be verified at start-up. Incorrect rotation will result in increased compressor noise and higher than normal suction pressure. To change rotation, reverse two lead wires on the incoming power supply. Compressor must be checked by a qualified technician or compressor warranty will be void.

–15–

REFRIGERATION SYSTEM INSTALLATION

Usage With Non-Manitowoc Condensing Units

Manitowoc CVD® Condensing Units are specifically designed for usage with a QuietQube

Ice Machine Head Section. Standard condensing units will not operate a QuietQube

Ice Machine Head Section.

QuietQube® Ice

Machine

CVD

Condensing

Unit

Line Set

Q1000C

SU1000C/ UC-300

Q1400C

CVD1075 CVD1475 CVD1476

RC-20 RC-30 RC-50

Q0600C Q0800C

CVD0675 CVD0875

RC-21 RC-31 RC-51

QDUAL

CVD1875 CVD2075

RC-22 RC-32 RC-52

Line Set

Suction

Line

Liquid

Line

Insulation

Thickness

RC 20/30/50

3/4 in.

(19.1 mm)

1/2in.

(12.7 mm)

Suction

Line

1/2"

(13 mm)

Liquid Line

1/4" (7 mm)

RC 21/31/51

5/8 in.

(15.9 mm)

3/8 in.

(9.5 mm)

RC 22/32/52

7/8 in.

(22.2 mm)

5/8 in.

(15.9 mm)

Suction

Line

3/4"

(19 mm)

Liquid Line

1/4" (7 mm)

–16–

Factory Equipment Refrigera nt Amounts

ICE MACHINE HEAD SECTION

Q0600C/Q0800C/Q1000C/SU1000C/Q1400C

Each ice machine head section ships from the factory with an R-404A refrigerant charge appropriate for the entire system operation. The serial tag on the ice machine indicates the refrigerant charge. The refrigerant charge is sufficient to operate the ice machine in ambient temperatures between -20°F (-28.9°C) and 130°F (54.4°C), (CVD1476, 50°F to 110°F, 10°C to 43°C) with line set lengths of up to 100 ft. (30.5 m).

QDUAL  Each QDUAL ice machine head section ships from the factory with an R-404A refrigerant charge appropriate for installations with up to 50" of refrigerant tubing. The serial tag on the ice machine indicates the refrigerant charge. For line set runs longer than 50 ft., 1 lb. of additional refrigerant must be added for each 10 ft. of line set run. The receiver is designed to hold a charge sufficient to operate the ice machine in ambient temperatures between -20°F (-28.9°C) and 120°F (49°C), with line set lengths of up to 100 feet (15 m)

Caution

Never add more than nameplate charge to the refrigeration system for any application.

Caution

The 60-month compressor warranty (including the 36-month labor replacement warranty) will not apply if the Manitowoc Ice Machine and Manitowoc CVD® Condensing Unit are not installed according to specifications. This warranty also will not apply if the refrigeration system is modified with a condenser, heat reclaim device, or other parts or assemblies not manufactured by Manitowoc Ice, Inc.

–17–

Refrigeration Line Set Installation

Refrigeration line set installation consists of vertical and horizontal line set distances between the ice machine and the condensing unit. The following guidelines, drawings and calculation methods must be followed to assure proper oil return and CVD

Condensing Unit/ice Machine operation. Step 1. Prior to installation of the ice machine and

CVD

Condensing Unit be sure that the distance between them is within the line set routing guidelines outlined in this manual.

Step 2. Properly route refrigeration tubing between the Ice Machine Head Section and the CVD

Condensing

Unit. For a roof/wall penetration, cut a 3-in. (76.2 mm)

circular hole in the wall or roof for routing of refrigeration tubing, as required. A qualified person must perform all roof penetrations.

A. LINE SET LENGTH

Warning

Potential Personal Injury Situation

The ice machine head section contains the refrigerant charge. Installation and brazing of the line sets must be performed by a properly trained refrigeration technician aware of the dangers of dealing with refrigerant charged equipment.

Caution

QuietQube® Ice Machines will not function with line sets greater than 100 ft. (30.5 m). Do not attempt to go beyond this distance and add refrigerant charge to compensate!

–18–

B. LINE SET RISE OR DROP

35 ft. (10.7 m) Rise: The maximum distance the CVD® Condensing Unit can be above the ice machine.

15 ft. (4.5 m) Drop: The maximum distance the CVD® Condensing Unit can be below the ice machine.

SV1751

35 FT. (10.7 M)

MAXIMUM

DISTANCE

SV1750

15 FT. (4.5 M)

MAXIMUM DISTANCE

–19–

C. SUCTION LINE OIL TRAPS

0 to 20 ft. (0 to 6.1 m) Rise: The ice machine head section has one oil trap built in which allows for a maximum condenser rise of 20 ft. (6.1 m) without additional traps in the suction line.

21 to 35 ft. (6.4 to 10.7 m) Rise: The suction line requires an additional oil trap (“S” type) to be installed. Install the trap as close as possible to midpoint between the ice machine head section and CVD

Condensing Unit. S-Trap Kits are available from Manitowoc (refer to chart).

Caution

Do not form unwanted traps in refrigeration lines. Never coil excess refrigeration tubing.

SV1751

21 FT. OR

MORE RISE

ADDITIONAL

TRAP KIT

REQUIRED.

–20–

SERVICE LOOP A service loop in the line set permits easy access to

the ice machine for cleaning and service.  The supplied service loop is an installation

requirement. Excess tubing must allow 180 degree rotation of the ice machine.

 A service loop is no t considered an oil trap.  The se rvice loop is not included when calcu lating

the length, rise or drop of the tubing run.

 Do not use hard rigid copper for the service loo p.

Manitowoc S-Trap Kit

Model S-Trap Kit # Tubing Size

Q0600C Q0800C

K00172

5/8 in.

(15.9 mm)

Q1000C

SU1000C

Q1400C

K00166

3/4 in.

(19.1 mm)

QDUAL K00164

7/8 in.

(22.2 mm)

Caution

If a line set has a rise followed by a drop, another rise cannot be made. Likewise, if a line set has a drop followed by a rise, another drop cannot be made.

SV1760

–21–

Step 3. When the line set requires shortening or lengthening, do so before connecting the line set to the ice machine head section or the CVD

Condensing

Unit.

Step 4. To prevent oxidation of the copper, purge line set and condensing unit with dry nitrogen while brazing. .

CONNECT THE LINE SET TO THE ICE MACHINE HEAD SECTION

The line set shut-off valves at the back of the ice machine must remain closed and be protected from heat during the brazing process. Wrap the valves in a wet rag or other type of heat sink prior to brazing. Cool braze joint with water immediately after brazing to prevent heat migration to the valve.

Caution

Do not form unwanted traps in refrigeration lines. Never coil excess refrigeration tubing.

Warning

The ice machine head section contains refrigerant charge. The ice machine head section contains three (3) refrigeration valves that must remain closed until proper installation of the line sets is completed.

SV1757

VA LVES MUST REMAIN CLOSED

AND BE PROTECTED FROM

HEAT WHEN BRAZING

(WRAP WITH WET RAG).

Q0600C/Q0800C/Q1000C SHOWN

–22–

CONNECT THE LINE SET TO THE CVD® CONDENSING UNIT

The compressor oil rapidly absorbs moisture. Be prepared to complete line set installation and start your evacuation process in order to minimize the time the compressor is exposed to the atmosphere. (Maximum amount of time the system can be exposed to the atmosphere is 15 minutes.)

The line set can be routed for entry through the front or left side of the condensing unit.

 Remove knockout for preferred location.  Insert supplied plastic bushings in knockout holes to

prevent tubing from contacting sheet metal.

 Use the suppl ied 90° elbows to route tubing.  Cut the tubing ends of the suction and liquid lines

and braze line sets to the condensing unit.

Warning

The condensing unit ships from the factory pressurized with a 50/50 mixture of nitrogen/helium. Bleed off pressure from both suction and liquid line access ports prior to cutting into refrigeration lines.

PT1284A

MINIMIZE THE TIME THE REFRIGERATION

SYSTEM IS EXPOSED T O THE ATMOSPHERE

(15 MINUTES MAXIMUM).

SUCTION

FILTER

SUCTION LINE

–23–

Step 5. Schrader valve core removal tools that allow for removal and installation of the valve cores without removing manifold gauge set hoses are recommended to decrease the evacuation time.

Leave the line set shut-off valves closed (front seated). Pressure test the line sets and CVD

Condensing Unit with 150 psig of dry nitrogen. Add nitrogen at the line set shut-off valves located at the back of the ice machine. Complete the pressure test, verify no leaks are present and remove the nitrogen from the system before connecting the vacuum pump. Connect a vacuum pump to both of the line set shut-off valves located at the back of the ice machine head section. Evacuate to 250 microns (or less). To completely evacuate the CVD

Condensing Unit, continue the evacuation for 30 minutes after reaching the 500-micron point.

Liquid Line

Suction Line

SV3077

SV1757

CONNECT VACUUM

PUMP TO LINE SET

SHUT-OFF VALVES.

–24–

If required, the line set and condensing unit can be evacuated from the schrader valves located in the CVD® Condensing Unit. Schrader valve core removal tools (that allow for putting the cores back in without removing vacuum pump hoses) must be used if evacuating from the condensing unit side.

Isolate the vacuum pump from the line set shut-off valves and/or condensing unit access ports prior to proceeding.

PT1284

ALTERNATE CONNECTIONS AT

CONDENSING UNIT SCHRADER VALVES

–25–

Step 6. The suction line, liquid line and receiver service valves are closed during shipment and installation.

Open the valves prior to starting the ice machine. A. Slowly backseat (open – turn counterclockwise) the

suction line shut-off valve.

B. Slowly backseat (open – turn counterclockwise) the

liquid line shut-off valve.

C. Slowly backseat (open-turn counterclockwise) the

receiver service valve.

SV1762

USE ALLEN WRENCH TO OPEN

(TURN COUNTERCLOCKWISE)

LIQUID AND SUCTION LINE

SHUT-OFF VALVES.

Q0600C/Q0800C/Q1000C

SV1769c

USE ALLEN WRENCH

TO OPEN (TURN

COUNTERCLOCKWISE)

LIQUID AND SUCTION

LINE SHUT-OFF

VALVES.

Q1400C/QDUAL

SUCTION AND LIQUID LINE

SHUT-OFF VALVES

–26–

Verify O-rings in schrader valve caps are intact and reinstall on shut-off valves to prevent refrigerant leakage. Replace shut-off valve access caps and torque to the following specifications.

Replace cap on receiver service valve and tighten. There is a liquid line solenoid valve at the outlet of the receiver; refrigerant will not flow to the condensing unit until the ice machine head section is started. Connect power to both the ice machine head section and the CVD

Condensing Unit. Place the ice machine toggle switch into the ICE position; this will allow refrigerant to enter the line set and condensing unit.

Step 7. Leak check the new line set connections at the ice machine head section, condensing unit and S-trap as well as all factory joints throughout the entire system. Disconnect power to the CVD

Condensing Unit. Place the ICE/OFF/CLEAN toggle switch in the ICE position. This allows the low side and high side

Important

All refrigeration valve caps must be reinstalled to prevent future refrigeration leaks.

Torque Values

S tem 18-20 ft. lbs. Caps 12-15 ft. lbs.

Schraeder Core 1.5-3 in. lbs.

SV1756

TURN

COUNTERCLOCKWISE

TO OPEN.

RECEIVER SERVICE

VALVE CAP

(TURN COUNTERCLOCKWISE

TO REMOVE.)

RECEIVER SERVICE VALVE

–27–

pressures to equalize. Place the ICE/OFF/CLEAN toggle switch in the OFF position. Connect power to the CVD

Condensing Unit and allow system to pump

down. Step 8. To prevent condensation, the entire suction

line including the shut-off valve must be insulated. All insulation must be airtight and sealed at both ends.

The following insulation requirements prevent condensation at 90°F (32.2°C) ambient 90% Relative Humidity. If higher humidity is expected, increase insulation thickness.

The entire suction line set, including the suction service valve located on the back of the ice machine, requires a minimum of 3/4 in. (12.7 mm) wall thickness insulation.

The entire liquid line set requires a minimum of  1/4 in. (6.4 mm) wall thickness insulation.

Important

To prevent condensation, the entire suction line including the shut-off valve must be insulated. All insulation must be airtight and sealed at both ends.

This requires a minimum of 3/4 in. (12.7 mm) insulation wall thickness with conditions at or below 90% humidity and 90° ambient. When higher humidity will be experienced, insulation wall thickness will need to be increased.

–28–

SUCTION SHUT-OFF VALVE INSULATION The preformed suction shut-off valve insulation is

located in the plastic bag taped to the water curtain.

A. Verify valve and schrader caps are tightened to

specifications (see step 6).

B. Place insulation over schrader valve cap and left

side of valve. Position the tab between the mounting bracket and rear panel.

C. Fold insulation and hold against right hand side of

valve while securing with electrical tape. Seal the line set insulation to the shut-off valve insulation with electrical tape.

PREFORMED

INSULATION

TIGHTEN VALVE CAPS

TO SPECIFICATIONS.

PLACE TAB BETWEEN

VALVE BODY AND PANEL.

FOLD INSULA TION OVER

RIGHT SIDE OF VALVE

AND SECURE WITH ELECTRICAL TAPE.

–29–

3 PHASE SCROLL COMPRESSOR ROTATION CVD2075 ONLY

A trained and qualified technician must verify compressor rotation at equipment startup or compressor warranty will be void. Incorrect rotation of a scroll compressor can be identified by:

 Noisy compressor operation  Elevated suction pressure  Low discharge pressure  Compressor trips on overload protector

To change compressor rotation, reverse (exchange locations) any two incoming power supply leads.

CONDENSING UNIT HEAT OF REJECTION

Ice machines, like other refrigeration equipment, reject heat through the condenser. It is necessary to know the amount of heat rejected by an ice machine when determining the additional BTUH requirements for air conditioning equipment.

 Self-contained air-cooled ice machines add the total

BTUH load to a conditioned space.

 QuietQube® Ice Machine head sections add an

insignificant amount of load to a conditioned space.

Series

Condensing

Unit

Heat of Rejection*

A/C** Peak

CVD0675 9,000 13,900 CVD0875 12,400 19,500 CVD1075 16,000 24,700 CVD1475

CVD1476

24,000 35,000

CVD1875 28,000 42,000 CVD2075 39,000 53,000

**B.T.U./Hour

**Because the heat of rejection varies during the ice

making cycle, the figure shown is an average.

–30–

Operational Checks

GENERAL

Your Manitowoc ice machine was factory-operated and adjusted before shipment. Normally, a newly installed ice machine does not require any adjustment.

To ensure proper operation, always perform these Operational Checks when starting the ice machine:

 For t he First Time  After a Prolonged Out-of-Service Period  After Cleaning and Sanitizing

Routine adjustments and maintenance procedures outlined in this manual are not covered by the warranty.

WATER LEVEL Q0600C/Q0800C/Q1000C/QDUAL

The water level sensor is set to maintain the proper water level above the water pump housing. The water level is not adjustable.

If the water level is incorrect, check the water level probe for damage (probe bent, etc.). Clean, repair or replace the probe as necessary.

WATER LEVEL PROBE

WATER LEVEL

SENSOR PROBE

WATER

PUMP

WATER LEVEL

ABOVE HOUSING

–31–

Q1400C/SU1000C

1. Check the water level while the ice machine is in the Clean mode and the water pump is running. The correct water level above the water pump impeller housing is:

 Q1400C - 1/8-1/2 in. (3-12.5 mm)  SU1000C - 1/8-1/4 in. (3-6.35 mm)

2. The float valve is factory-set for the proper water level. If adjustments are necessary:

A. Loosen the two screws on the float valve

bracket.

B. Raise or lower the float valve assembly as

necessary, then tighten the screws.

If further adjustment is required, carefully bend the float arm to achieve the correct water level.

WATER

LEVEL

–32–

ICE THICKNESS CHECK

After a Harvest cycle, inspect the ice cubes in the ice storage bin. The ice thickness probe is set to maintain an ice bridge of 1/8 in. (3.2 mm). If an adjustment is needed, follow the steps below.

1. Turn the ice thickness probe adjustment screw clockwise for a thicker ice bridge, or counterclockwise for a thinner ice bridge.

2. Make sure the ice thickness probe wire and bracket do not restrict movement of the probe.

SV3113

ADJUSTING

SCREW

1/8 IN. ICE BRIDGE

THICKNESS

ICE THICKNESS ADJUSTMENT

1/8” ICE BRIDGE THICKNESS

–33–

HARVEST SEQUENCE WATER PURGE Q0600C/Q0800C/Q1000C/SU1000C/QDUAL

The Harvest sequence water purge adjustment may only be used when the ice machine is hooked up to special water systems, such as a de-ionized water treatment system.

 The Harvest sequence water purge may be set to

15, 30, or 45 seconds.

 During the Harvest sequence water purge, the water

fill valve energizes and de-energizes by time. The water purge must be at the factory setting of 45

seconds for the water fill valve to energize during the last 15 seconds of the water purge. If it is set to less than 45 seconds, the water fill valve will not energize during the water purge.

Important

The Harvest sequence water purge is factory-set at 45 seconds. A shorter purge setting (with standard water supplies such as city water) is not recommended. This can increase water system cleaning and sanitizing requirements.

SV1208

CONTROL

BOARD

WATER PURGE

ADJUSTMENT

–34–

Interior Cleaning and Sanitizing

NOTE: Clean and sanitize the ice machine every six

months for efficient operation. If the ice machine requires more frequent cleaning and sanitizing, consult a water care professional to test the water quality and recommend appropriate water treatment or installation of the AuCS

(Automatic Cleanin g System) Accessory. If requi red, an extre mely dirty ice machine may be taken apart for cleaning and sanitizing.

NOTE: The SU1024YC is designed for installation on a SerVend UC-300 dispenser only. Refer to the SerVend UC-300 Installation, Use and Care Manual for dispenser cleaning/sanitizing procedures.

Caution

Use only Manitowoc approved Ice Machine Cleaner (part number 94-0546-3) and Sanitizer (part number 94-0565-3). It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling. Read and understand all labels printed on bottles before use.

Caution

Do not mix Ice Machine Cleaner and Sanitizer solutions together. It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling.

Warning

Wear rubber gloves and safety goggles (and/or face shield) when handling Ice Machine Cleaner or Sanitizer.

–35–

Manitowoc’s Patented Cleanin g or San itizi ng Technology

Manitowoc ice machines include technology that allows the initiation and completion of a cleaning or sanitizing cycle at the flip of a switch. This cycle will permit cleaning or sanitizing of all surfaces that come in contact with the water distribution system. Periodic maintenance must be performed that includes sanitizing the bin (or dispenser) and adjacent surface areas, which cannot be contacted by the water distribution system.

This technology will also allow initiation and completion of a Clean or Sanitize cycle, after which the ice machine automatically starts ice making again. Refer to the cleaning or sanitizing procedure for complete details.

The AuCS

Accessory can be set to automatically start and finish a Clean or Sanitize cycle every 2, 4, or 12 weeks. This accessory monitors ice-making cycles and initiates a cleaning or sanitizing cycle automatically. After completion of the cleaning or sanitizing cycle, the ice machine returns to ice making automatically. Refer to Automatic Cleaning System (AuCS

) Accessory for further details.

–36–

ALPHASAN

The goal of AlphaSan is to keep the plastic surfaces of an ice machine cleaner, by reducing or delaying the formation of biofilm. The active ingredient in AlphaSan

 is the element silver in the form of silver

ions (Ag+). AlphaSan

 slowly releases silver ions via

an ion exchange mechanism. When AlphaSan

 is

compounded directly into a plastic part, a controlled release of silver ions from the surface is regulated to maintain an effective concentration at or near the surface of the plastic ice machine part.

AlphaSan’s

 unique ability to effectively control the

release of silver not only protects against undesired discoloration of the plastic, but also will last the life of the plastic part. Although AlphaSan helps prevent biofilm build up it does not eliminate the need for periodic cleaning and maintenance. AlphaSan

 has

no adverse effect on the taste of the ice or beverage.

–37–

CLEANING PROCEDURE

Ice machine cleaner is used to remove lime scale or other mineral deposits. It is not used to remove algae or slime. Refer to “Sanitizing Procedure” on page 39 for removal of algae and slime. To initiate a cleaning cycle using Manitowoc’s Patented Cleaning Technology, use th e following procedure.

Step 1. Set the toggle switch to the OFF position after ice falls from the evaporator at the end of a Harvest cycle. Or, set the switch to the OFF position and allow the ice to melt off the evaporator.

Step 2. To start a cleaning cycle, move the toggle switch to the CLEAN position. The water will flow through the water dump valve and down the drain. The Clean light* will turn on to indicate the ice machine is in the cleaning mode.

Step 3. Wait about one minute or until water starts to flow over the evaporator.

Step 4. Add the proper amount of Manitowoc Ice Machine Cleaner to the water trough.

*The Q1400C ice machine control board does not energize a

Clean light.

Caution

Never use anything to force ice from the evaporator. Damage may result.

QuietQube® Models Amount of Cleaner

Q0600C/Q0800C/

SU1000C/Q1400C

5 ounces (150 ml)

Q1000C/QDUAL 9 ounces (270 ml)

–38–

Step 5. The ice machine will automatically time out a ten-minute cleaning cycle, followed by six Rinse cycles, and then stop. The Clean light* will turn off to indicate the cleaning mode is completed. This entire cycle lasts approximately 25 minutes.

NOTE: Periodic cleaning must be performed on adjacent surface areas not contacted by the water distribution system.

Step 6. When the cleaning process stops, move the toggle switch to the OFF position. Refer to “Sanitizing Procedure” on page 39.

Step 7.**

A. The ice machine may be set to start and finish a

cleaning procedure, and then automatically start ice making again.

B. Wait about one minute in to the cleaning cycle (until

water starts to flow over the evaporator), then move the switch from CLEAN to ICE position.

C. When the cleaning cycle is completed, the Clean

light will turn off and an ice making sequence will start automatically.

NOTE: After the toggle switch is moved to the ICE position, opening the curtain (bin switch) will interrupt the cleaning sequence. The sequence will resume from the point of interruption when the curtain (bin switch) closes.

NOTE: The SU1024YC is designed for installation on a SerVend UC-300 dispenser only. Refer to the SerV end UC-300 Installation Use and Care Manual for dispenser cleaning/sanitizing procedures.

**The Q1400C ice machine control board does not energize

a Clean light.

**The Q1400C ice machine control board can not perform

step 7, and must remain in the CLEAN position until the Clean cycle is finished. Moving the toggle switch to the ICE position will initiate a Freeze cycle.

–39–

SANITIZING PROCEDURE

Use sanitizer to remove algae or slime. Do not use it to remove lime scale or other mineral deposits. To initiate a sanitizing cycle using Manitowoc’s Patented Cleaning/Sanitizing Technology, use the following procedure.

Step 2. To start a sanitizing cycle, move the toggle switch to the CLEAN position. The water will flow through the water dump valve and down the drain. The Clean light* will turn on to indicate the ice machine is in the cleaning mode.

Step 3. Wait about one minute or until water starts to flow over the evaporator.

Step 4. Add the proper amount of Manitowoc Ice Machine Sanitizer to the water trough.

*The Q1400C ice machine control board does not energize a

Clean light.

Caution

Never use anything to force ice from the evaporator. Damage may result.

QuietQube® Models Amount of Sanitizer

Q0600C/Q0800C/Q1000C/

SU1000C/Q1400C

3 ounces (90 ml)

QDUAL 6 ounces (180 ml)

–40–

Step 5. The ice machine will automatically time out a ten-minute sanitizing cycle, followed by six Rinse cycles, and then stop. The Clean light* will turn off to indicate the sanitizing mode is completed. This entire cycle lasts approximately 25 minutes.

NOTE: Periodic cleaning must be performed on adjacent surface areas not contacted by the water distribution system. If the bin requires sanitizing, remove all of the ice and sanitize it with a solution of 1

oz. (30 ml) of sanitizer with up to 4 gal. (15 l) of

water. Step 6. When the sanitizing process stops, move the

toggle switch to the ICE position to start ice making again.

Step 7.**

A. The ice machine may be set to start and finish a

sanitizing procedure, and then automatically start ice making again.

B. Wait about one minute into the sanitizing cycle

(until water starts to flow over the evaporator), then move the switch from CLEAN to ICE position.

C. When the sa nitizing cycle is completed, the Clean

light will turn off and an ice making sequence will start automatically.

NOTE: The SU1024YC is designed for installation on a SerVend UC-300 dispenser only. Refer to the SerV end UC-300 Installation Use and Care Manual for dispenser cleaning/sanitizing procedures.

**The Q1400C ice machine control board does not energize

a Clean light.

**The Q1400C ice machine control board can not perform

step 7, and must remain in the CLEAN position until the Clean cycle is finished. Moving the toggle switch to the ICE position will initiate a Freeze cycle.

–41–

Automatic Cleaning System (AuCS®) Accessory

This accessory monitors ice-making cycles and initiates cleaning (or sanitizing) procedures automatically. T he AuCS® Accessory can be set to automatically clean or sanitize the ice machine every 2, 4, or 12 weeks. Periodic maintenance must be performed that includes cleaning or sanitizing the bin (or dispenser) and adjacent surface areas, which can not be contacted by the water distribution system.

AUTOMATIC OPERATION The following occurs when the toggle switch is in the

ICE position:  The ice machine control board counts the number of

ice Harvest cycles.

 The AuCS® Accessory interrupts the ice making

mode and starts the cleaning (or sanitizing) mode when the harvest count equals the “Frequency of Cleaning” setting of the AuCS

 When the automatic cleaning (or sanitizing) cycle is

complete (approximately 25 minutes), ice making resumes automatically, an d the “Harvest Count” is reset to zero.

Caution

Refer to the AuCS® Accessory Installation, Use and Care Guide for complete details on the installation, operation, maintenance and cautio nary statements of this accessory.

Important

Opening the curtain switch will interrupt the cleaning or sanitizing sequence. The sequence will resume from the point of interruption when the curtain recloses.

–42–

MANUAL START OPERATION Step 1. Set the toggle switch to the OFF position after

ice falls from the evaporator at the end of a Harvest cycle. Or, set the switch to the OFF position and allow the ice to melt off the evaporator.

Step 2. To start the automatic cleaning system, move the toggle switch to the CLEAN position. The water will flow through the water dump valve and down the drain. The Clean light* will turn on to indicate the ice machine is in the cleaning mode. The AuCS

then automatically adds cleaner or sanitizer to the ice machine.

Step 3. The ice machine will automatically time out a ten-minute cleaning or sanitizing cycle, followed by six Rinse cycles, de-energize the Clean light* and stop. This entire cycle lasts approximately 25 minutes.

Step 4. After the cleaning or sanitizing cycle stops, move the toggle switch to ICE position.

Step 5.**

A. The ice machine may be set to start and finish a

cleaning or sanitizing cycle, then automatically start ice making again.

B. You must wait about one minute into the cleaning

cycle (until water starts to flow over the evaporator), then move the toggle switch from CLEAN to ICE position.

C. When the cleaning or sanitizing cycle is completed,

the Clean light will turn off and an ice-making sequence will start automatically.

**The Q1400C ice machine control board does not energize

a Clean light.

**The Q1400C ice machine control board can not perform

step 7, and must remain in the CLEAN position until the Clean cycle is finished. Moving the toggle switch to the ICE position will initiate the Rinse cycles. The six Rinse cycles must be completed before a Freeze cycle can be initiated.

Caution

Never use anything to force ice from the evaporator. Damage may result.

–43–

Removal of Parts for Cleaning or Sanitizing

1. Turn off the water supply to the ice machine at the water service valve.

2. Remove the water curtain and the components you want to clean or sanitize. See the following pages for removal procedures for these parts.

3. Soak the removed part(s) in a properly mixed solution.

4. Use a soft-bristle brush or sponge (NOT a wire brush) to carefully clean the parts.

Warning

Disconnect electric power to the ice machine at the electric switch box before proceeding.

Warning

Wear rubber gloves and safety goggles (and/or face shield) when handling Ice Machine Cleaner or Sanitizer.

Solution Type Water Mixed With

Cleaner 1 gal. (4 l)

16 oz. (500 ml)

cleaner

Sanitizer 4 gal. (15 l)

1 oz. (30 ml)

sanitizer

Warning

Do not mix Cleaner and Sanitizer solutions together . It is a violation of Federal law to use these solutions in a manner inconsistent with their labeling.

–44–

5. Use the solution and a brush to clean the top, sides, and bottom evaporator extrusions; the inside of the ice machine panels; and the entire inside of the bin.

6. Thoroughly rinse all of the parts and surfaces with clean water.

7. Install the removed parts.

NOTE: Incomplete rinsing of the ice thickness probe or water level probe may leave a residue. This could cause the ice machine to malfunction. For best results, brush or wipe the probe off while rinsing it. Thoroughly dry the probe before installing it.

8. Turn on the water and electrical supply.

9. Verify the ice thickness probe is properly adjusted.

Caution

Do not immerse the water pump motor in the cleaning or sanitizing solution.

–45–

WATER DUMP VALVE The water dump valve normally does not require

removal for cleaning. To determine if removal is necessary:

1. Locate the water dump valve.

2. Set the toggle switch to ICE.

3. While the ice machine is in the Freeze mode, check the dump valve’s clear plastic outlet drain hose for leakage.

A. If the dump valve is leaking, remove,

disassemble and clean it.

B. If the dump valve is not leaking, do not remove

it. Instead, follow standard ice machine cleaning procedures.

Follow the procedure below to remove the dump valve.

1. If so equipped, remove the water dump valve shield from its mounting bracket.

2. Lift and slide the coil retainer cap from the top of the coil.

3. Note the position of the coil assembly on the valve for assembly later. Leaving the wires attached, lift the coil assembly off the valve body and the enclosing tube.

4. Press down on the plastic nut on the enclosing tube and rotate it 1/4 turn. Remove the enclosing tube, plunger, and plastic gasket from the valve body.

NOTE: At this point, the water dump valve can easily be cleaned. If complete removal is desired, continue with step 5.

Warning

Disconnect the electric power to the ice machine at the electric service switch box and turn off the water supply before proceeding.

–46–

NOTE: During cleaning, do not stretch, damage or remove the spring from the plunger. If it is removed, slide the spring’s flared end into the plunger’s slotted top opening until the spring contacts the plunger spring stop.

5. Remove the valve body.

6. Remove the tubing from the dump valve by twisting the clamps off.

Remove the two screws securing the dump valve and the mounting bracket.

Important

The plunger and the inside of the enclosing tube must be completely dry before assembly.

DUMP VALVE REMOVAL

DO NOT

DISCONNECT

WIRES A T COIL.

RETAINING

CAP

WATER

DUMP

VALVE

SHIELD

DUMP VALVE DISASSEMBLY

PLUNGER

SPRING STOP

PLUNGER

DIAPHRAGM

VALVE BODY

ENCLOSING

TUBE

COIL

CAP

SPRING

–47–

WATER PUMP

1. Disconnect the water pump power cord.

2. Disconnect the hose from the pump outlet.

3. Loosen the screws securing the pump, mounting bracket to the bulkhead.

4. Lift the pump and bracket assembly off the screws.

Warning

Disconnect the electric power to the ice machine at the electric service switch box and turn off the water supply.

SV1618

WATER

PUMP

POWER

CORD

LOOSEN

SCREWS.

WATER PUMP REMOVAL

(Q0600C/Q0800C/Q1000C SHOWN)

–48–

ICE THICKNESS PROBE

1. Compress the side of the ice thickness probe near the top hinge pin and remove it from the bracket.

NOTE: At this point, the ice thickness probe can easily be cleaned. If complete removal is desired, continue with step 2 below.

2. Disconnect the wire lead from the control board inside the electrical control box.

Warning

Disconnect the electric power to the ice machine at the electric service switch box and turn off the water supply.

SV1619

DISCONNECT

WIRE LEAD.

ICE THICKNESS PROBE REMOVAL

COMPRESS

HINGE PIN

TO REMOVE.

–49–

WATER LEVEL PROBE

Q0600C/Q0800C/Q1000C/QDUAL

1. Loosen the screw that holds the water level probe in place. The probe can easily be cleaned at this point without proceeding to step 2.

2. If complete removal is required, disconnect the wire lead from the control board (1F) inside the electrical control box.

Warning

Disconnect the electrical power to the ice machine at the electrical disconnect before proceeding.

SV1621

WATER LEVEL PROBE REMOVAL

Q0600C/Q0800C/Q1000C Shown

SCREW

WATER

LEVEL

PROBE

WATER

TROUGH

ICE

MACHINE

SIDE

PANEL

WIRE LEAD

–50–

SPLASH SHIELD

Q1400C/QDUAL

1. Pull forward on left and right Nylatch connectors until disengaged from ice machine (connectors remain attached to splash shield).

2. Remove panel from front of ice machine by lifting forward and up.

Important

Splash shield must be reinstalled to prevent water leakage.

NYLATCH CONNECTORS

PULL FORWARD TO

DISENGAGE.

Q1400 Shown

–51–

WATER CURTAIN

1. Gently flex the curtain in the center and remove it from the right side.

2. Slide the left pin out.

SV1213

WATER CURTAIN REMOVAL

–52–

FLOAT VALVE

SU1000C/Q1400C

1. Turn off the water supply to the ice machine at the water service valve.

2. Turn the splash shield counterclockwise one or two turns.

3. Pull the float valve forward and off the mounting bracket.

4. Disconnect the water inlet tube from the float valve at the compression fitting.

5. Remove the filter screen and cap for cleaning.

SV1217

FLOAT VALVE REMOVAL

WATER INLET

TUBE

COMPRESSION

FITTING

FIL TER SCR EEN

AND CAP

ON/OFF

SLIDE

SWITCH

SPLASH

SHIELD

–53–

WATER INLET VALVE

Q0600C/Q0800C/Q1000C/QDUAL

The water inlet valve normally does not require removal for cleaning. Follow the instructions below to determine if removal is necessary.

1. Set the ICE/OFF/CLEAN switch to OFF. Locate the water inlet (in the water area of the ice machine). It directs water into the water trough.

2. When the ice machine is off, the water inlet valve must completely stop water flow into the machine. Watch for water flow. If water flows, remove, disassemble and clean the valve.

3. When the ice machine is on, the water inlet valve must allow the proper water flow through it. Set the toggle switch to ON. Watch for water flow into the ice machine. If the water flow is slow or only trickles into the ice machine, remove, disassemble, and clean the valve.

Continued on Next Page...

Warning

Disconnect the electric power to the ice machine at the electric service switch box and turn off the water supply before proceeding.

–54–

Follow the procedure below to remove the water inlet valve.

1. Remove the valve shield if necessary.

2. Remove the filter access screws that hold the valve in place.

NOTE: The water inlet valve can be disas sembled and cleaned without disconnecting the incoming water supply line to the ice machine.

3. Remove, clean, and install the filter screen.

4. If necessary, remove the enclosing tube access screws to clean interior components.

SV1622

WATER INLET VALVE REMOVAL

WATER

INLET

VALVE

FILTER

ACCESS

SCREWS

INCOMING

WATER

LINE

–55–

WATER DISTRIBUTION TUBE

1. Disconnect the water hose from the distribution tube.

2. Loosen the thumbscrews, which secure the distribution tube.

3. Lift the end of the distribution tube with the hose fitting up, and then slide it back and to the right.

Caution

Do not force this removal. Be sure the locating tab is clear before sliding the distribution tube back.

SV1620

WATER DISTRIBUTION TUBE REMOVAL

THUMBSCREW

DISTRIBUTION

TUBE

1. LIFT UP.

2. SLIDE BACK.

3. SLIDE TO RIGHT.

THUMB-

SCREW

–56–

4. Disassemble for cleaning. A. Twist both of the inner tube ends until the tabs

line up with the keyways.

B. Pull the inner tube ends outward.

SV1211

WATER DISTRIBUTION TUBE DISASSEMBLY

INNER

TUBE

INNER

TUBE

KEYWAY

TAB

–57–

WATER TROUGH REMOVAL

Q1400C/QDUAL

1. Remove the front splash shield, water pump and float valve from the ice machine.

2. Remove the quarter turn fasteners (turn counterclockwise) securing the trough in place.

3. Lift up and forward on the front of the water trough while allowing the rear of the water trough to drop. Remove the water trough from the ice machine.

SV1771B

REMOVE THE TWO

QUARTER TURN

FASTENERS BY TURNING

COUNTERCLOCKWISE.

WATER TROUGH REMOVAL

–58–

WATER TROUGH REMOVAL

SU1000C (SerVend UC-300 Dispenser)

1. Remove the quarter turn fasteners (turn counterclockwise) securing the trough in place.

2. Pull forward on the water trough until the rear pins disengage from the water trough.

3. Lift up and forward on the front of the water trough while allowing the rear of the water trough to drop.

4. Remove the water trough from the ice machine.

Pins Located Behind Water Curtain

–63–

Removal from Service/Winterization

GENERAL

S pecial precautions must be taken if the ice machine is to be removed from service for an extended period of time or exposed to ambient temperatures of 32°F (0°C) or below.

1. Place the ice machine toggle switch in the OFF position.

2. Turn of f the wat er supply.

3. Remove the water from the water trough.

4. Disconnect and drain the incoming ice-making water line at the rear of the ice machine.

5. Blow compressed air in the drain openings in the rear of the ice machine until no more water comes out of the drain.

6. Place the toggle switch in the ICE position, then wait 45 seconds for the water fill solenoid valve to energize. Blow compressed air through the incoming water supply in the rear of the ice machine until no more water comes out of the inlet water line.

7. Make sure water is not trapped in any of the water lines, drain lines, distribution tubes, etc.

Caution

If water is allowed to remain in the ice machine in freezing temperatures, severe damage to some components could result. Damage of this nature is not covered by the warranty.

–64–

CVD1476 WATER COOLED CONDENSING UNIT

Place the ice machine toggle switch into the OFF position.

1. "Front seat" (shut off) the receiver service valve. Hang a tag on the switch as a reminder to open the valve before restarting.

2. Perform steps 1-6 under "Q1400C Head Section".

3. Insert a large screwdriver between the bottom spring coils of the water regulating valve. Pry upward to open the valve.

4. Hold the valve open and blow compressed air through the condenser until no water remains.

AuCS® ACCESSORY

Refer to the AuCS® Accessory manual for Winterization of the AuCS

Accessory.

–65–

Component Identification

ICE MACHINE HEAD SECTION Q0600C/Q0800C/Q1000C

SV1754

WATER INLET

VALVE

LIQUID LINE

SOLENOID

VALVE

WATER DUMP

VALVE

DRAIN HOSE

LIQUID LINE

SHUT-OFF VALVE

SUCTION LINE

SHUT-OFF VALVE

RECEIVER

SERVICE

VALVE

COOL VAPOR

VALVE

–66–

Q0600C/Q0800C/Q1000C

SV1605A

FLOW CLAMP USED

ON REGULAR SIZE

CUBE ONLY

DISTRIBUTION

TUBE

ICE THICKNESS

PROBE

EVAPORATOR

WATER CURTAIN

WATER TROUGH

WATER PUMP

ICE/OFF/CLEAN

SWITCH

–67–

SU1000C/SerVend UC-300 Dispenser

Ice Thickness Probe

Electrical Compartment &

Toggle Switch

Dump Valve

Water Trough

Water Curtain

Water Pump/Float

Valve Access Panels

Cool Vapor

Valve

Water Pump

Liquid Line Drier

Float Valve

Liquid Line

Solenoid

Valve

–68–

Q1400C

ICE/OFF/CLEAN

SWITCH

SV1770LH

ICE

THICKNESS

PROBE

COOL VAPOR

VALVE

FLOAT VALVE WATER INLET

SUCTION LINE

SHUT-OFF VALVE

SV1770RH

LIQUID LINE

SHUT-OFF VALVE

COOL VAPOR

VALVE

WATER DUMP

VALVE

LIQUID LINE

SOLENOID

VALVE

RECEIVER

SERVICE

VALVE

Receiver Service Valve

–69–

QDUAL

DISTRIBUTION

TUBE

SV1780

EVAPORATOR WATER PUMP

WATER CURTAIN

WATER TROUGH

–70–

CVD® CONDENSING UNIT CVD0675/CVD0875/CVD1075/CVD1475

ACCESS VALVE

CONDENSER

FAN MOTOR

HEAD PRESSURE CONTROL V AL VE

AIR CONDENSER

COMPRESSOR

SUCTION

ACCUMULATOR

LIQUID LINE AND

SUCTION LINE

CONNECTION POINTS

ELECTRICAL

COMPARTMENT

SV2085

–71–

CVD1476

LIQUID LINE AND

SUCTION LINE

CONNECTION POINTS

SUCTION

ACCUMULATOR

COMPRESSOR

WATER COOLED

CONDENSER

HEAD

PRESSURE

CONTROL

VALVE

ELECTRICAL

COMPARTMENT

WATER

REGULATING

VALVE

–72–

CVD1875/CVD2075

ACCESS VALVES

CVD1875 SHOWN

CONDENSER

FAN MOTOR

AIR CONDENSER

HEAD PRESSURE CONTROL V ALVE

COMPRESSOR

SUCTION

ACCUMULATOR

LIQUID LINE AND

SUCTION LINE

CONNECTION POINTS

ELECTRICAL

COMPARTMENT

–73–

Ice Making Sequence of Operation

Q0600C/Q0800C/Q1000C/SU1000C Initial Start-Up or Start-Up After 

Automatic Shut-Off

1. Water Purge

Before the compressor starts, the water pump and water dump solenoid are energized for 45 seconds to purge the ice machine of old water. This ensures that the ice-making cycle starts with fresh water.

The cool vapor solenoid valve is also energized during the water purge, although it stays on for an additional 5 seconds (50-second total on time) during the initial refrigeration system start-up.

2. Refrigeration System Start-Up

Ice Machine Section: The liquid line solenoid valve energizes after the 45-second water purge, and remains on throughout the entire Freeze and Harvest sequences. The cool vapor solenoid valve remains on for 5 seconds during initial compressor start-up and then shuts off.

The water fill valve is energized at the same time as the liquid line solenoid valve.

CVD

Condensing Unit: When the refrigerant pressure is high enough to close the low-pressure control (after the cool vapor valve energizes in step 1), the contactor coil is energized and the compressor starts. The compressor and fan cycling control* are supplied with power throughout the entire Freeze and Harvest sequences. When the refrigerant pressure is high enough to close the fan cycling pressure control, the condenser fan motor starts.

*The Q0600C ice machines does not use a fan cycling

control. The compressor and the condenser fan motor are wired through the contactor. Anytime the contactor coil is energized, these components are supplied with power.

–74–

Freeze Sequence

3. Prechill

The compressor is on for 30 seconds prior to water flow to prechill the evaporator. The water fill valve remains on until the water level probe is satisfied.

4. Freeze

When suffici ent ice has forme d, the water fl ow (not the ice) contacts the ice thickness probe. After approximately 7 seconds of continual water contact, the Harvest sequence is initiated. The ice machine cannot initiate a Harvest sequence until a 6-minute freeze lock has been surpassed.

–75–

Harvest Sequence

5. Water Purge

After the 45-second water purge, the water fill valve, water pump and dump valve de-energize. (Refer to “Water Purge Adjustment” for details.)

The cool vapor solenoid valve also opens at the beginning of the water purge to divert refrigerant gas into the evaporator.

When the refrigerant pressure is low enough to open the fan cycling pressure control,* the condenser fan motor stops.

*The Q0600C ice machine does not use a fan cycle control;

therefore the condenser fan motor will continue to run in the Harvest cycle.

6. Harvest

The cool vapor solenoid valve remains open and the refrigerant gas warms the evaporator causing the cubes to slide as a sheet, off the evaporator and into the storage bin. The sliding sheet of cubes swings the water curtain out, opening the bin switch.

The momentary opening and reclosing of the bin switch terminates the Harvest sequence and returns the ice machine to the Freeze sequence (steps 3-4).

–76–

Automatic Shut-Off

7. Automatic Shut-Off

Ice Machine Section: When the storage bin is full at the end of a Harvest sequence, the sheet of ice cubes fails to clear the water curtain and will hold it open. After the water curtain is held open for 7 seconds, the ice machine shuts off. The ice machine remains off for 3 minutes before it can automatically restart.

CVD

Condensing Unit: The liquid line solenoid valve closes, allowing the refrigeration system to pump down. When the refrigerant pressure is low enough to open the fan cycling pressure control,* the condenser fan motor stops. When the refrigerant pressure is low enough to open the low-pressure control, the contactor coil is de-energized and the compressor stops.

The ice machine remains off until enough ice has been removed from the storage bin to allow the ice to fall clear of the water curtain. As the water curtain swings back to the operating position, the bin switch recloses and the ice machine restarts (steps 1-2), provided the 3-minute delay period is complete.

*The Q0600C ice machine does not use a fan cycle control;

therefore the condenser fan motor will energize and deenergize with the compressor.

–77–

Q600C/Q800C/Q1000C/SU1000C Energized Parts Chart

Ice Making

Sequence of

Operation

Control Board Relays Condensing Unit

Length

of Time

1 Water Pump

Water

Fill

Valve

Cool

Vapor

Valve

Water

Dump

Valve

Liquid

Line

Solenoid

LPC

Contactor

Coil

Contactor

Comp

Fan Motor*

Initial Start-Up

1. Water Purge

On Off On On Off

Closed

Off

45 Seconds

2. Refrigeration System Start-Up

Off On On Off On

Closed

5 Seconds

Freeze Sequence

3. Prechill

Off

May Cycle

On/Off

During

First 45 Sec.

Off Off On

Closed

30 Seconds

4. Freeze On

Cycles Off

Then On

One More Time

Locked out

After 6 min.

Off Off On

Closed

Unit 7 Sec.

Water Contact

w/Ice Thickness

Probe

–78–

Harvest Sequence

5. Water Purge

30 Sec.

Off,

15 Sec.

On On On

Closed

CVD675

All others

May Cycle

On/Off

Factory

Set at

45 Seconds

6. Harvest Off Off On Off On

Closed

CVD675

All others

May Cycle

On/Off

Bin Switch

Activation

7. Automatic Shut-Off

Off Off Off Off Off Off Off

Until Bin

Switch

Recloses

Q600C/Q800C/Q1000C/SU1000C Energized Parts Chart

Ice Making

Sequence of

Operation

Control Board Relays Condensing Unit

Length

of Time

1 Water Pump

Water

Fill

Valve

Cool

Vapor

Valve

Water

Dump

Valve

Liquid

Line

Solenoid

LPC

Contactor

Coil

Contactor

Comp

Fan Motor*

–79–

Q1400C Initial Start-Up or S tart-Up After Automatic Shut-Off

1. Water Purge

Freeze Sequence

2. Prechill

Ice Machine Section: The liquid line solenoid valve energizes after the 45-second water purge and remains on for the entire ice making Freeze and Harvest sequences. The liquid line solenoid is energized for 30 seconds prior to water flow. This allows the refrigeration system to start up and prechills the evaporator.

CVD

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

3. Freeze

The water pump restarts after the 30-second prechill. An even flow of water is directed across the evaporator and into each cube cell, where it freezes.

–80–

Harvest Sequence

4. Water Purge

The water pump continues to run, and the water dump valve energizes for 45 seconds to purge the water in the sump trough. After the 45-second water purge, the water pump and dump valve de-energizes.

Both cool vapor solenoid valves also open at the beginning of the water purge to divert refrigerant gas into the evaporator.

5. Harvest

The cool vapor solenoid valves remain open, and the refrigerant gas warms each evaporator causing the cubes to slide as a sheet, off the evaporator and into the storage bin. The ice may fall first from either the right or the left evaporator, or both at the same time. The sliding sheet of cubes swings the water curtain out, opening the corresponding bin switch.

The momentary opening and closing of the bin switch de-energizes relay #2 (right) or #3 (left). Opening relay #2 or #3 de-energizes the corresponding cool vapor solenoid valve for the remainder of the Harvest sequence. The momentary opening and reclosing of both bin switches terminates the Harvest sequence and returns the ice machine to the Freeze sequence (steps 2-3).

Automatic Shut-Off

6. Automatic Shut-Off

Ice Machine Section: When the storage bin is full at the end of a Harvest sequence, the sheet of cubes fails to clear either one or both of the water curtains. After one or both water curtains are held open for 7 seconds, all five relays open and the ice machine shuts off.

CVD

Condensing Unit: When the refrigerant pressure is low enough to open the low pressure switch, the contactor coil is de-energized and the compressor and condenser fan motor (CVD1475 only) stop.

The ice machine remains off until enough ice has been removed from the storage bin to allow the ice to fall clear of the water curtain(s). As the water curtain swings back to the operating position, the bin switch recloses and the ice machine restarts (steps 1-2).

–81–

Energized Parts Chart – Model Q1400C

Ice Making

Sequence of

Operation

Control Board Relays Condensing Unit

Length

of Time

1 Water Pump

Cool

Vapor

Valve Right

Cool

Vapor

Valve

Left

4 Water Dump Valve

Liquid

Line

Solenoid

Valve

LPCO*

Contactor

Coil

Contactor Condenser Fan Motor*

Compressor

Initial Start-Up

1. Water Purge

On Off Off On Off Open Off

45 Seconds

Freeze Sequence

2. Prechill

Off Off Off Off On Closed **On

30 Seconds

–82–

3. Freeze On Off Off Off On Closed **On

Unit 7 Sec.

Water Contact

w/Ice Thickness

Probe

Harvest Sequence

4. Water Purge

On On On On On Closed **On

Factory

Set at

45 Seconds

5. Harvest Off On On Off On Closed

**On

Bin Switch

Activation

Energized Parts Chart – Model Q1400C (Continued)

Ice Making

Sequence of

Operation

Control Board Relays Condensing Unit

Length

of Time

1 Water Pump

Cool

Vapor

Valve Right

Cool

Vapor

Valve

Left

4 Water Dump Valve

Liquid

Line

Solenoid

Valve

LPCO*

Contactor

Coil

Contactor Condenser Fan Motor*

Compressor

–83–

*Low Pressure Control (close on pressure increase). **CVD1375/CVD1475 ONLY - The fan motor is wired through a fan cycle pressure control, therefore, it may cycle on and off.

6. Automatic Shut-Off

Off Off Off Off Off Open Off

Until BOTH Bin

Switches Recloses

Energized Parts Chart – Model Q1400C (Continued)

Ice Making

Sequence of

Operation

Control Board Relays Condensing Unit

Length

of Time

1 Water Pump

Cool

Vapor

Valve Right

Cool

Vapor

Valve

Left

4 Water Dump Valve

Liquid

Line

Solenoid

Valve

LPCO*

Contactor

Coil

Contactor Condenser Fan Motor*

Compressor

–84–

QDUAL Initial Start-Up or S tart-Up After Automatic Shut-Off

1. Water Purge

Before the refrigeration system starts, the water pump and water dump solenoid are energized fo r 45 seconds, to purge the ice machine of old water. This feature ensures that the ice-making cycle starts with fresh water. The cool vapor solenoid valves are also energized during the water purge, although they stay on for an additional 5 seconds (50 seconds total on time) then shut off.

2. Refrigeration System Start-Up

Ice Machine Section: The liquid line solenoid valve energizes after the 45-second water purge, and remains on throughout the entire Freeze and Harvest sequences. The cool vapor solenoid valves remain on for 5 seconds during initial compressor start-up and then shut off.

The water fill valve is energized at the same time as the liquid line solenoid valve.

CVD

Condensing Unit: When the refrigerant pressure is high enough to close the low pressure control (after the cool vapor valves energize in step 1), the contactor coil is energized and the compressor starts. The compressor and fan cycling control are supplied with power throughout the entire Freeze and Harvest sequences. When the refrigerant pressure is high enough to close the fan cycling pressure control, the condenser fan motor starts.

–85–

Freeze Sequence

3. Prechill

The liquid line solenoid is energized for 30 seconds prior to water flow . This allows the refrigeration system to start up and prechill the evaporator. The water fill valve remains energized until the water level sensor is satisfied.

4. Freeze

The water pump restarts after the 30-second prechill. An even flow of water is directed across the evaporator and into each cube cell, where it freezes. The water fill valve will cycle on one more time to refill the water trough as needed. When sufficient ice has formed, the water flow (not the ice) contacts the ice thickness probe. After approximately 10 seconds of continual water contact, the Harvest sequence is initiated. The ice machine cannot initiate a Harvest sequence until a 6-minute freeze lock has been surpassed.

–86–

Harvest Sequence

5. Water Purge

The water pump continues to run, and the water dump valve energizes for 45 seconds to purge the water in the sump trough. The water fill valve energizes for the last 15 seconds of the 45-second water purge. After the 45-second water purge, the water fill valve, water pump, and dump solenoid valve de-energize. The cool vapor solenoids open at the beginning of the wate r purge.

6. Harvest

The cool vapor valves remain open, and the refrigerant warms each evaporator causing the cubes to slide as a sheet, off the evaporator and into the storage bin. The ice may fall first from either the right or the left evaporator, or both at the same time. The sliding sheet of cubes swings the water curtain out, opening the corresponding bin switch and deenergizing the cool vapor valve. The momentary opening and reclosing of both bin switches terminates the Harvest sequence and returns the ice machine to the Freeze sequence (steps 3-4).

6A. Water Assist Harvest Feature

Typical duration of a Harvest sequence is less than

2.5 minutes. When the Harves t sequence time reaches 4 minutes, the following occurs:

4 minutes into a Harvest sequence: The water fill valve will energize to fill the trough with water.

5 minutes into a Harvest sequence: The water pump will energize and flow water over the evaporators.

The water fill valve and water pump remain on until all bin switches have been activated, or until the 7-minute Harvest sequence time limit is reached.

7. Automatic Shut-Off

*Note: Early production control boards checked for bin switch closure within 7 seconds.

CVD

Condensing Unit: When the refrigerant pressure is low enough to open the low pressure switch, the contactor coil is de-energized and the compressor and condenser fan motor stop.

The ice machine remains off until enough ice has been removed from the storage bin to allow the ice to fall clear of the water curtain(s). As the water curtains swing back to the operating position, the bin switch recloses and the ice machine restarts (steps 1-2), provided the 3-minute delay period is complete. Both curtains must be closed to start an ice-making sequence.

–88–

Energized Parts Chart – Model QDUAL

Ice Making

Sequence of

Operation

Control Board Relays Condensing Unit

Length

of Time

1 Water Pump

Water

Fill

Solenoid

Dump

Valve

Liquid

Line

Solenoid

Cool

Vapor

Valve

Cool

Vapor

Valve

LPCO*

Contactor

Coil

Contactor

Fan Motor

and

Compressor

Initial Start-Up

1. Water Purge

On Off On Off On On Closed On

45 Seconds

2. Refrigeration System Start-Up

Off On Off On On On Closed **On

5 Seconds

–89–

Freeze Sequence

3. Prechill

Off

Until Water

is Sensed

Off On Off Off Closed **On

30 Seconds

4. Freeze On

Cycles

Off

Then On

1 More

Time

Off On Off Off Closed **On

Until 10

Sec.water

cont act w/Ice

Thickness

Probe

Harvest Sequence

5. Water Purge

30 Sec.

Off

15 Sec.

On On On On Closed **On

Water Purge

Factory Set

at 45 Sec.

Energized Parts Chart – Model QDUAL (Continued)

Ice Making

Sequence of

Operation

Control Board Relays Condensing Unit

Length

of Time

1 Water Pump

Water

Fill

Solenoid

Dump

Valve

Liquid

Line

Solenoid

Cool

Vapor

Valve

Cool

Vapor

Valve

LPCO*

Contactor

Coil

Contactor Fan Motor

and

Compressor

–90–

*Low pressure Control (close on pressure increase). **The fan motor is wired through a fan cycle pressure control, therefore, it may cycle on and off.

6. Harvest Off Off Off On On On Closed **On

Bin Switch

Activation

7. Auto Shut-Off Off Off Off Off Off Off Open Off

Until Bin

Switch

Recloses

Energized Parts Chart – Model QDUAL (Continued)

Ice Making

Sequence of

Operation

Control Board Relays Condensing Unit

Length

of Time

1 Water Pump

Water

Fill

Solenoid

Dump

Valve

Liquid

Line

Solenoid

Cool

Vapor

Valve

Cool

Vapor

Valve

LPCO*

Contactor

Coil

Contactor Fan Motor

and

Compressor

–91–

Electrical System

COMPONENT SPECIFICATIONS AND DIAGNOSTICS CONTROL BOARD

All QuietQube® control boards incorporate the following features. Refer to “Sequence of Operation” for additional information specific to your model.

Harvest/Safety Limit Light

This light’s primary function is to be on as water contacts the ice thickness probe during the Freeze cycle, and remain on throughout the entire Harvest cycle. The light will flicker as water splashes on the probes. The light’s secondary function is to continuously flash when the ice machine is shut off on a safety limit, and to indicate which safety limit shut off the ice machine.

Freeze Time Lock-In Feature

The ice machine control system incorporates a freeze time lock-in feature. This prevents the ice machine from short cycling in and out of Harvest.

The control board locks the ice machine in the Freeze cycle for six minutes. If water contacts the ice thickness probe during these six minutes, the Harvest light will come on (to indicate that water is in contact with the probe), but the ice machine will stay in the Freeze cycle. After the six minutes are up, a Harvest cycle is initiated.

To allow the service technician to initiate a Harvest cycle without delay , this feature is not used on the first cycle after moving the toggle switch OFF and back to ICE.

Maximum Freeze Time

The control system includes a built-in safety that will automatically cycle the ice machine into Harvest after 60 minutes in the Freeze cycle.

Safety Limits

There are two safety limits that protect the ice machine if the Freeze or Harvest cycles are outside of their guidelines.

–92–

Three-Minute Delay

The three-minute delay is initiated whenever the ice machine cycles off (automatic shut-off) on a full bin.

The delay period starts when a water curtain is open for 7 continuous seconds in the Harvest cycle.

 If the 3-minute delay period has expired, closure of

the water curtain will initiate an immediate start-up of a Freeze sequence.

 If the water curtain closes before the 3-minute delay

period has expired, the ice machine will start a Freeze sequence immediately after the 3-minute delay period expires.

 The 3-mi nute delay period is overridden when the

toggle switch is moved to the OFF position, then back to ICE.

Inputs

The control board, along with inputs, controls all electrical components, including the ice machine sequence of operation. Prior to diagnosing, you must understand how the inputs affect the control board operation. Refer to specific component specifications (inputs), wiring diagrams and ice machine sequence of operation sections for details.

As an example, refer to “Ice Thickness Probe” in the component specification section of this manual for information relating to how the probe and control board function together.

Control Board Relays

The control board relays energize and de-energize system components.

Relays are not field replaceable.

–95–

MAIN FUSE Function

The control board fuse stops ice machine operation if electrical components fail, causing high amp draw.

Specifications

The main fuse is 250 Volt, 7 amp.

Check Procedure

1. If the bin switch light is on with the water curtain closed, the fuse is good.

2. Remove the fuse. Check the resistance across the fuse with an ohmmeter.

Warning

High (line) voltage is applied to the control board (terminals #55 and #56) at all times. Removing the control board fuse or moving the toggle switch to OFF will not remove the power supplied to the control board.

Warning

Disconnect electrical power to the entire ice machine before proceeding.

Reading Result

Open (OL) Replace fuse

Closed (O) Fuse is good

–96–

BIN SWITCH Function

Movement of the water curtain controls bin switch operation. The bin switch has two main functions:

1. Terminating the Harvest cycle and returning the ice machine to the Freeze cycle. This occurs when the bin switch is opened and closed again within 7

seconds during the Harvest cycle.

2. Automatic ice machine shut-off. If the storage bin is full at the end of a Harvest cycle, the sheet of cubes fails to clear the water curtain and holds it open. After the water curtain is held open for 7 seconds, the ice machine shuts off. The ice machine remains off until enough ice is removed from the storage bin to allow the sheet of cubes to drop clear of the water curtain. As the water curtain swings back to the operating position, the bin switch closes and the ice machine restarts, provide the 3-minute delay has expired.

Specifications

The bin switch is a magnetically operated reed switch. The magnet is attached to the lower right corner of the water curtain. The switch is attached to the evaporator-mounting bracket.

The bin switch is connected to a varying D.C. voltage circuit. (Voltage does not remain constant.)

NOTE: Because of a wide variation in D.C. voltage, it is not recommended that a voltmeter be used to check bin switch operation.

Important

The water curtain must be ON (bin switc h(s) closed) to start ice making.

Manitowoc QD0872C, CVD0675, QY0874C, CVD0875, QR1070C Technician Manual

Specifications and Main Features

Frequently Asked Questions

User Manual