Manitowoc EC18 User manual

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