Manitowoc EC18, EC20, EC30, EC40, EC50 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 of f 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 Checklist 55
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. . . . . . . . . . . . . . . . . . . . 6 5
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 (Without TImer) Self-Contained Air-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
EC65 Self-Contained Air-Cooled — Standard Cube
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 138
EC65 Self-Contained Air-Cooled — Large Cube
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
EC65 Self-Contained Water-Cooled — Standard
Cube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 144
EC65 Self-Contained Water-Cooled — Large Cube
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 147
EC80 Self-Contained Air-Cooled — Standard Cube
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 150
EC80 Self-Contained Air-Cooled — Large Cube
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
EC80 Self-Contained Water-Cooled — Standard
Cube . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 156
EC80 Self-Contained Water-Cooled — Large Cube
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159
Diagrams
Wiring Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 163
Mechanical Timer Models . . . . . . . . . . . . . . . . 163
SCR Models. . . . . . . . . . . . . . . . . . . . . . . . . . . 164
No Timer Models . . . . . . . . . . . . . . . . . . . . . . . 165
Tubing Schematics. . . . . . . . . . . . . . . . . . . . . . . 166
EC18/EC20/EC30/EC40 Tubing Schematic. . . 166
EC50/EC65/EC80 Tubing Schematic. . . . . . . . 167
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–1–
General Information
Model Numbers
This manual covers the following models:
Self-Contained
Air-Cooled
Water-Cooled
ECS018A --ECS020A ECS020W
ECG020A ECG020W
ECS030A ECS030W
ECG030A ECG030W
ECS040A ECS040W
ECG040A ECG040W
ECS050A ECS050W
ECG050A ECG050W
ECS065A ECS065W
ECG065A ECG065W
ECS080A ECS080W
ECG080A ECG080W
–2–
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Part Number 80-1479-3 10/10 3
Installation
Location of Ice Machine
The location selected for the ice machine must meet
the following criteria. If any of these criteria are not
met, select another location.
The location must be indoors.
The location must be free of airborne and other
contaminants.
The air temperature must be at least 10ºC but must
not exceed 43.4ºC.
The location must not be near heat-generating
equipment or in direct sunlight.
The location must be capable of supporting the
weight of the ice machine and a full bin of ice.
The location must allow enough clearance for water ,
drain, and electrical connections in the rear of the
ice machine.
The location must not obstruct airflow through or
around the ice machine (condenser airflow is in and
out the front). Refer to the chart below for clearance
requirements.
*NOTE: The ice machine may be built into a cabinet.
There is no minimum clearance requirement for the
top or left and right sides of the ice machine. The listed
values are recommended for efficient operation and
servicing only.
Self-Contained
Air-Cooled
Self-Contained
Water-Cooled
Top/Sides 203 mm (8")* 127 mm (5")*
Back 127 mm (5")* 127 mm (5")*
4 Part Number 80-1479-3 10/10
WATER SERVICE/DRAINS
Water Supply
Local water conditions may require treatment of the
water to inhibit scale formation, filter sediment, and
remove chlorine odor and taste.
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, 5 bar (500 kPA), install a
water pressure regulator.
Install a water shut-off valve.
Drain Connections
Drain lines must have a 2.5 cm per meter drop, and
must not create traps.
The floor drain must be large enough to
accommodate drainage from all drains.
!
Caution
The ice machine must be protected if it will be
subjected to temperatures below 0°C. Failure
caused by exposure to freezing temperatures is not
covered by the warranty.
Part Number 80-1479-3 10/10 5
ELECTRICAL REQUIREMENTS
Voltage
The maximum allowable voltage variation is ±6% of
the rated voltage on the ice machine model/serial
number plate at start-up (when the electrical load is
highest).
All ice machines are factory pre-wired with a power
cord only, no plug is supplied.
Fuse/Circuit Breaker
A separate fuse/circuit breaker mu st be provided for
each ice machine. An electrical disconnect switch
must be provided if the ice machine is hard wired
(wired without a plug).
Total Circuit Ampacity
The total circuit ampacity is used to help select the
wire size of the electrical supply.
The wire size (or gauge) is also dependent upon
location, materials used, length of run, etc., so a
qualified electrician must make the determination.
6 Part Number 80-1479-3 10/10
ELECTRICAL SPECIFICATIONS
Ice
Machine
Air Water
Voltage
Phase
Cycle
Max. Fuse/
Circuit
Breaker
Total
Amps
Voltage
Phase
Cycle
Max. Fuse/
Circuit
Breaker
Total
Amps
EC18
115/60/1 NA NA
230/50/1 10 amp 2.2 NA NA
230/60/1 10 amp 2.2 NA NA
EC20
115/60/1 115/60/1 NA
230/50/1 10 amp 2.5 230/50/1 10 amp 2.3
230/60/1 10 amp 2.5 230/60/1 10 amp 2.3
EC30
115/60/1 115/60/1
230/50/1 10 amp 3.4 230/50/1 10 amp 3.2
230/60/1 10 amp 3.4 230/60/1 10 amp 3.2
EC40
230/50/1 10 amp 3.4 230/50/1 10 amp 3.1
230/60/1 10 amp 3.4 230/60/1 10 amp 3.1
Part Number 80-1479-3 10/10 7
EC50
115/60/1 115/60/1
230/50/1 10 amp 4.0 230/50/1 10 amp 3.7
230/60/1 10 amp 4.0 230/60/1 10 amp 3.7
EC65
115/60/1 115/60/1
230/50/1 10 amp 4.2 230/50/1 10 amp 3.8
230/60/1 10 amp 4.2 230/60/1 10 amp 3.8
EC80
115/60/1 115/60/1
230/50/1 10 amp 4.4 230/50/1 10 amp 4.0
230/60/1 10 amp 4.4 230/60/1 10 amp 4.0
8 Part Number 80-1479-3 10/10
POWER CONSUMPTION - KWH PER 24 HOURS
Model
Air Temp/Water Temp
25/15 32/21 43/32
ECS18A 6.4 6.5 6.8
ECS20A 7.1 7.4 7.8
ECG20A 9.2 9.8 10.5
ECS20W 6.2 6.3 6.4
ECG20W 6.0 6.0 6.2
ECS30A 10.0 10.4 11.1
ECG30A 7.1 7.4 7.8
ECS30W 8.9 8.9 9.2
ECG30W 8.9 8.9 8.9
ECS40A 11.1 11.6 12.3
ECG40A 11.0 11.5 12.2
ECS40W 9.5 9.4 9.2
ECG40W 9.2 9.4 9.2
Part Number 80-1479-3 10/10 9
POWER CONSUMPTION - KWH PER 24 HOURS
Model
Air Temp/Water Temp
25/15 32/21 43/32
ECS50A 12.9 13.3 14.4
ECG50A 12.6 13.0 14.0
ECS50W 11.1 11.2 11.5
ECG50W 11.0 10.9 11.4
ECS65A 12.6 13.1 14.1
ECG65A 12.9 13.2 14.1
ECS65W 11.2 11.3 11.7
ECG65W 11.0 10.9 11.4
ECS80A 15.4 16.3 17.4
ECG80A 15.1 15.8 16.9
ECS80W 13.6 13.8 13.9
ECG80W 13.2 13.4 13.7
10 Part Number 80-1479-3 10/10
ICE MACHINE HEAT OF REJECTION
Series Ice
Machine
Heat of Rejection
Air Conditioning Peak
EC18 1,150 2,300
EC20 1,400 2,600
EC30 1,900 3,300
EC40 2,100 4,100
EC50 2,600 5,000
EC65 2,900 5,000
EC80 4,300 7,400
BTU/Hour
Because the heat of rejection varies during the ice
making cycle, the figure shown is an average.
Part Number 80-1479-3 10/10 11
Component Identification
Water
Curtains
Bin
Thermostat
On/Off/Wash-Fill
Toggle Switch
Air Cooled
Condenser
Water
Trough
Evaporator
Thermostat
12 Part Number 80-1479-3 10/10
Evaporator
Ice Chute
Spray Bar
Spray
Nozzles
Toggle
Switch
Part Number 80-1479-3 10/10 13
COMPONENT REMOVAL
Top Cover
For easiest access to the evaporator compartment, the
top cover can be removed.
1. Remove two screws on the rear of the ice
machine.
2. Slide top cover back to disengage the three pins
from the front panel
Remove 2 Screws and
Slide Cover Back
14 Part Number 80-1479-3 10/10
Bin Door
Allows access to the storage bin.
1. Remove top cover.
2. Slide door up until rear pins align with slot in door
tracks.
3. Lift rear door pins out and slide door up until front
door pins align with slot.
4. Lift door out of door track
Align Door Pins With
Track Slots, Then Lift
Door Out Of Track
Part Number 80-1479-3 10/10 15
Water Curtain
The water curtain is designed to keep the spraying
water from escaping the evaporator compartment.
Removal of the bin door is not required, but enhances
access.
1. Grasp one end of the ice curtain and lift up.
2. Pivot water curtain and disengage remaining end.
3. To re-install into ice machine, grasp one end of
the water curtain, install one end, pivot the
opposite end and pull down into position. Make
sure tabs are secure in grooves.
Water Curtain
16 Part Number 80-1479-3 10/10
Ice Chute
The ice chute is positioned over the spray nozzles and
allows the ice to easily fall into the bin. It must be firmly
positioned over the S pray Bar Assembly, with the front
edge inside the water trough or the spray nozzles will
not be aligned with the spray holes, and spray water
will fall into bin.
1. Grab protruding spray holes on one end and lift
up.
2. Pivot ice chute and remove.
3. To re-install ice chute, grasp protruding spray
holes and position over Spray Bar Assembly.
Make sure rear supports are over Spray Bar
Assembly, and front edge is inside of water trough
Ice Chute
Part Number 80-1479-3 10/10 17
SPRAY BAR
The spray bar supplies water to the individual icemaking cups. Water from the Water Pump sprays
through the nozzles, located on the upper portion of
the tubes.
1. Grasp one end of the spray bar , lift up and remove
from seat formed in water trough.
2. Remove both plastic clips on water inlet tubing by
grasping both ears on clip and separating.
3. Apply food grade lubricate to ease re-assembly of
spray bar components when necessary.
4. To re-install spray bar, position water inlet tubing
on inlet ports, and squeeze clips until tight.
5. Reposition assembly on water trough seat.
NOTE: Nozzles and inserts can be removed for
cleaning by unscrewing nozzles. Inserts are located
inside the spray bar ports. The spray bar also
disassembles for easy cleaning
18 Part Number 80-1479-3 10/10
Sump Drain Overflow Tube
The sump drain overflow tube is located in the
evaporator water sump.
1. Remove shutters and ice chute.
2. Lift spray bar or disconnect and remove for
easiest access.
3. Pull up on over flow tube to remove.
To replace plug, insert in hole, and push with force to
make a tight seal
Overflow Tube
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