Manitowoc EC18 Manuale utente

Manitowoc

Technician’s Handbook

This manual is updated as new information and models

are released. Visit our website for the latest manual.

www.manitowocice.com

America’s #1 Selling Ice Machine

EC Models

Manitowoc Ice P/N 80-1520-3 9/10

Safety Notices

When using or servicing these Ice Machines, 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 ice machine.

Throughout this handbook, you will see the following

types of safety notices:

!Warning

Text in a Warning box alerts you to a potential

personal injury situation. Be sure to read the

Warning statement before proceeding, and work

carefully.

!Caution

Text in a Caution box alerts you to a situation in

which you could damage the ice machine. Be sure

to read the Caution statement before proceeding,

and work carefully.

Procedural Notices

When using or servicing these Ice Machines, be sure

to read the procedural notices in this handbook. These

notices supply helpful information that may assist you

as you work.

Throughout this handbook, you will see the following

types of procedural notices:

NOTE: Text set off as a Note provides you with

simple, but useful extra information about the

procedure you are performing.

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, but may slow you down as

you work.

Read These Before Proceeding:

We reserve the right to make product improvements at

any time. Specifications and design are subject to

change without notice.

!Caution

Proper installation, care and maintenance are

essential for maximum ice production and trouble

free operation of your Manitowoc Ice Machine. If you

encounter problems not covered by this manual, do

not proceed, contact Manitowoc Ice, Inc. We will be

happy to provide assistance.

Important

Routine adjustments and maintenance procedures

outlined in this manual are not covered by the

warranty.

!Warning

PERSONAL INJURY POTENTIAL

Do not operate equipment that has been misused,

abused, neglected, damaged, or altered/modified

from that of original manufactured specifications.

!Warning

POTENTIAL PERSONAL INJURY SITUATION

This ice machine contains refrigerant charge.

Installation and Servicing must be performed by a

properly trained refrigeration technician aware of the

Dangers of dealing with refrigerant charged

equipment.

This Page Intentionally Left Blank

Table of Contents

General Information

Model Numbers. . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

Installation

Location of Ice Machine . . . . . . . . . . . . . . . . . . . . . 3

Water Service/Drains . . . . . . . . . . . . . . . . . . . . . . 4

Electrical Requirements . . . . . . . . . . . . . . . . . . . . 5

Electrical Specifications . . . . . . . . . . . . . . . . . . . . 6

Power Consumption - kwh per 24 hours . . . . . . . 8

Power Consumption - kwh per 24 hours . . . . . . . 9

Ice Machine Heat of Rejection . . . . . . . . . . . . . . 10

Component Identification

Component Removal . . . . . . . . . . . . . . . . . . . . . 13

Spray Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17

Maintenance

Cleaning & Sanitizing Procedure . . . . . . . . . . . . 20

Operation

Sequence Of Operation . . . . . . . . . . . . . . . . . . . . 25

Ice Cube Thickness Check. . . . . . . . . . . . . . . . . 28

Cube Shape . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Troubleshooting

All Models . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31

Ice Machine Will Not Run . . . . . . . . . . . . . . . . . .31

Compressor Won’t Run. . . . . . . . . . . . . . . . . . . .32

Compressor Electrical Diagnostics . . . . . . . . . . .33

Diagnosing Start Components. . . . . . . . . . . . . . .35

No Timer Models . . . . . . . . . . . . . . . . . . . . . . . . . .36

Water Pump Won’t Run. . . . . . . . . . . . . . . . . . . .36

Hot Gas Valve Won’t Energize . . . . . . . . . . . . . .37

Water Inlet Valve Won’t Energize . . . . . . . . . . . .38

Ice Machine Prematurely Harvests . . . . . . . . . . .39

Ice Machine Will Not Harvest . . . . . . . . . . . . . . .40

Mechanical Timer Models . . . . . . . . . . . . . . . . . . .41

Hot Gas Valve Won’t Energize . . . . . . . . . . . . . .42

Water Inlet Valve Won’t Energize . . . . . . . . . . . .43

Ice Machine Prematurely Harvests . . . . . . . . . . .44

Ice Machine Will Not Harvest . . . . . . . . . . . . . . .45

SCR Timer Models . . . . . . . . . . . . . . . . . . . . . . . . .46

Water Pump Won’t Run. . . . . . . . . . . . . . . . . . . .46

Hot Gas Valve Won’t Energize . . . . . . . . . . . . . .47

Water Inlet Valve Won’t Energize . . . . . . . . . . . .48

Ice Machine Prematurely Harvests . . . . . . . . . . .49

Ice Machine Will Not Harvest . . . . . . . . . . . . . . .50

Water System Checklist. . . . . . . . . . . . . . . . . . . . .51

Ice Production Check. . . . . . . . . . . . . . . . . . . . . . .52

Analyzing Discharge Pressure . . . . . . . . . . . . . . .53

Discharge Pressure High Checklist. . . . . . . . . . .54

Freeze Cycle Discharge Pressure Low Checklist55

Analyzing Suction Pressure . . . . . . . . . . . . . . . . .56

Suction Pressure High Checklist. . . . . . . . . . . . .58

Suction Pressure Low Checklist . . . . . . . . . . . . .59

Discharge Line Temperature Analysis. . . . . . . . .60

Component Check Procedures

On/Off/Wash-Fill Toggle Switch. . . . . . . . . . . . . 63

Bin Thermostat. . . . . . . . . . . . . . . . . . . . . . . . . . 64

Evaporator Thermostat. . . . . . . . . . . . . . . . . . . . 65

Mechanical Timer. . . . . . . . . . . . . . . . . . . . . . . . 67

Low Ambient Adjustment For Mechanical Timer 69

S.C.R. Timer. . . . . . . . . . . . . . . . . . . . . . . . . . . . 70

Low Ambient Adjustment For SCR Timer . . . . . 71

High Pressure Cutout (HPCO) Control. . . . . . . . 72

Hot Gas Valve . . . . . . . . . . . . . . . . . . . . . . . . . . 73

Refrigerant. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77

Recover/Evacuation/Charging . . . . . . . . . . . . . . 77

System Contamination Cleanup. . . . . . . . . . . . . 80

Mild System Contamination Cleanup. . . . . . . . . 82

Severe System Contamination Cleanup Procedure

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83

Filter-Driers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85

Total System Refrigeration Charge . . . . . . . . . . 86

Cycle Times/24 Hour Ice Production and

Refrigerant Pressure Charts

EC18 Self-Contained Air-Cooled — Standard Cube

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .90

EC20 (With Timer) Self-Contained Air-Cooled —

Standard Cube . . . . . . . . . . . . . . . . . . . . . . . . .93

EC20 (With Timer) Self-Contained Air-Cooled —

Large Cube . . . . . . . . . . . . . . . . . . . . . . . . . . . .96

EC20(WithoutTImer)Self-ContainedAir-Cooled—

Standard Cube . . . . . . . . . . . . . . . . . . . . . . . . .99

EC30 Self-Contained Air-Cooled — Standard Cube

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .102

EC30 Self-Contained Air-Cooled — Large Cube

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .105

EC30 (Serial Break not available) Self-Contained

Air-Cooled — Standard Cube . . . . . . . . . . . . .108

EC30 (Serial Break not available) Self-Contained

Air-Cooled — Large Cube. . . . . . . . . . . . . . . .111

EC40 Self-Contained Air-Cooled — Standard Cube

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .114

EC40 Self-Contained Air-Cooled — Large Cube

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .117

EC40 Self-Contained Water-Cooled — Standard

Cube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .120

EC40 Self-Contained Water-Cooled — Large Cube

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .123

EC50 Self-Contained Air-Cooled — Standard Cube

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .126

EC50 Self-Contained Air-Cooled — Large Cube

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .129

EC50 Self-Contained Water-Cooled — Standard

Cube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .132

EC50 Self-Contained Water-Cooled — Large Cube

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .135

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