Manitowoc Q450 User manual

©Manitowoc Ice, Inc.
P/N 80-1099-9 8/03

Safety Notices
As you work on a Q Model Ice Machine, 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:
Procedural Notices
As you work on a Q Model Ice Machine, 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.
! 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 potential
personal injury situation. 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, 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
PERSONAL INJURY POTENTIAL
The ice machine head section contains 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. The technician
must also be U.S. Government Environmental
Protection Agency (EPA) certified in proper
refrigerant handling and servicing procedures.

Table of Contents
General Information
How to Read a Model Number.............................. 1
Ice Cube Sizes ...................................................... 1
Model/Serial Number Location .............................. 2
Ice Machine Warranty Information ........................ 2
Owner Warranty Registration Card .................. 2
Warranty Coverage .......................................... 3
Installation
Location of Ice Machine ........................................ 5
Ice Machine Head Section Clearance
Requirements........................................................ 5
Stacking Two Ice Machines on a
Single Storage Bin ................................................ 6
Calculating Remote Condenser
Installation Distances........................................ 7
Removal from Service/Winterization
General ............................................................... 11
Self-Contained Air-Cooled Ice Machines ............ 11
Water-Cooled Ice Machines................................ 11
Remote Ice Machines.......................................... 12
AuCS®Accessory............................................... 12
Ice Making Sequence of Operation
Self-Contained Air- and Water-Cooled................ 13
Initial Start-Up or Start-Up After
Automatic Shut-Off ......................................... 13
Freeze Sequence ........................................... 14
Harvest Sequence.......................................... 15
Automatic Shut-Off ......................................... 16
Energized Parts Chart .................................... 17
Remote................................................................ 19
Initial Start-Up or Start-Up After
Automatic Shut-Off ......................................... 19
Freeze Sequence ........................................... 20
Harvest Sequence.......................................... 21
Automatic Shut-Off ......................................... 21
Remote Energized Parts Chart....................... 22
Electrical System
Wiring Diagrams.................................................. 25
Wiring Diagram Legend.................................. 25

Q200/Q280/Q320 - Self Contained -
1 Phase With Terminal Board......................... 26
Q280/Q370 - Self Contained -
1 Phase Without Terminal Board.................... 27
Q320 - Self Contained -
1 Phase Without Terminal Board.................... 28
Q420/Q450/Q600/Q800/Q1000 - Self
Contained-
1 Phase With Terminal Board......................... 29
Q420/Q450/Q600/Q800/Q1000 - Self
Contained-
1 Phase Without Terminal Board.................... 30
Q800/Q1000 - Self Contained -
3 Phase With Terminal Board......................... 31
Q800/Q1000 - Self Contained -
3 Phase Without Terminal Board.................... 32
Q1300/Q1800 - Self Contained -
1 Phase With Terminal Board......................... 33
Q1300/Q1600/Q1800 - Self Contained -
1 Phase Without Terminal Board.................... 34
Q1300/Q1800 - Self Contained -
3 Phase With Terminal Board......................... 35
Q1300/Q1600/Q1800 - Self Contained -
3 Phase Without Terminal Board.................... 36
Q450/Q600/Q800/Q1000 - Remote -
1 Phase With Terminal Board......................... 37
Q450/Q600/Q800/Q1000 - Remote -
1 Phase Without Terminal Board.................... 38
Q800/Q1000 -Remote -
3 Phase With Terminal Board......................... 39
Q800/Q1000 - Remote -
3 Phase Without Terminal Board.................... 40
Q1300/Q1800 - Remote -
1 Phase With Terminal Board......................... 41
Q1300/Q1600/Q1800 - Remote -
1 Phase Without Terminal Board.................... 42
Q1300/Q1800 - Remote -
3 Phase With Terminal Board......................... 43
Q1300/Q1600/Q1800 - Remote -
3 Phase Without Terminal Board.................... 44
Component Specifications and
Diagnostics.......................................................... 45
General........................................................... 45
Safety Limits ................................................... 45
Inputs.............................................................. 45

Main Fuse....................................................... 46
Bin Switch....................................................... 47
Water Curtain Removal Notes........................ 49
ICE/OFF/CLEAN Toggle Switch..................... 50
Ice Thickness Probe (Harvest Initiation)......... 51
Ice Thickness Probe Diagnostics ................... 53
Diagnosing Ice Thickness Control Circuitry.... 54
Water Level Control Circuitry.......................... 56
Diagnosing an Ice Machine Head Section
that Will Not Run............................................. 63
Compressor Electrical Diagnostics................. 64
Diagnosing Capacitors ................................... 66
Refrigeration System
Refrigeration System Diagnostics ....................... 71
Before Beginning Service ............................... 71
Ice Production Check ..................................... 72
Installation/Visual Inspection Checklist........... 73
Water System Checklist ................................. 74
Ice Formation Pattern..................................... 75
Safety Limits................................................... 77
Analyzing Discharge Pressure ....................... 85
Analyzing Suction Pressure............................ 88
Single Expansion Valve Ice Machines -
Comparing Evaporator Inlet and
Outlet Temperatures....................................... 92
Discharge Line Temperature Analysis............ 96
How to Use the Refrigeration System
Operational Analysis Tables........................... 98
Refrigeration System Operational Analysis
Tables........................................................... 101
Pressure Control Specifications
and Diagnostics................................................. 108
Harvest Pressure Regulating (HPR) System
Remotes Only............................................... 108
Headmaster Control Valve ........................... 112
Fan Cycle Control
(Self-Contained Air-Cooled Models Only) .... 115
High Pressure Cutout (HPCO) Control......... 116
Refrigeration Tubing Schematics ...................... 117
Self-Contained Air- or
Water -Cooled Models.................................. 117
Remote Models ............................................ 118

Cycle Times/24-Hour Ice Production/
Refrigerant Pressure Charts.............................. 119
Q200 Series
Self-Contained Air-Cooled ......................... 120
Self-Contained Water-Cooled.................... 121
Q280 Series
Self-Contained Air-Cooled ......................... 122
Self-Contained Water-Cooled.................... 123
Q320 Series
Self-Contained Air-Cooled ......................... 124
Self-Contained Water-Cooled.................... 125
Q370 Series
Self-Contained Air-Cooled ......................... 126
Self-Contained Water-Cooled.................... 127
Q420/450 Series
Self-Contained Air-Cooled ......................... 128
Self-Contained Water-Cooled.................... 129
Remote ...................................................... 130
Q600 Series
Self-Contained Air-Cooled ......................... 131
Self-Contained Water-Cooled.................... 132
Remote ...................................................... 133
Q800 Series
Self-Contained Air-Cooled ......................... 134
Self-Contained Water-Cooled.................... 135
Remote ...................................................... 136
Q1000 Series
Self-Contained Air-Cooled ......................... 137
Self-Contained Water-Cooled.................... 138
Remote ...................................................... 139
Q1300 Series
Self-Contained Air-Cooled ......................... 140
Self-Contained Water-Cooled.................... 141
Remote ...................................................... 142
Q1600 Series
Self-Contained Water-Cooled.................... 143
Remote ..................................................... 144
Q1800 Series
Self-Contained Air-Cooled ......................... 145
Self-Contained Water-Cooled.................... 146
Remote ...................................................... 147

Refrigerant Recovery/Evacuation...................... 148
Normal Self-Contained Model Procedures... 148
Normal Remote Model Procedures .............. 152
System Contamination Clean-Up...................... 157
General......................................................... 157
Determining Severity Of Contamination ....... 157
Cleanup Procedure ...................................... 159
Replacing Pressure Controls Without Removing
Refrigerant Charge ....................................... 162
Filter-Driers................................................... 164
Total System Refrigerant Charge................. 165
Additional Refrigerant Charges ......................... 166
For Line Sets Between 50’ - 100’. ................ 166

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–1–
General Information
HOW TO READ A MODEL NUMBER
ICE CUBE SIZES
Regular
1-1/8" x 1-1/8" x 7/8"
2.86 x 2.86 x
2.22 cm
Dice
7/8" x 7/8" x 7/8"
2.22 x 2.22 x
2.22 cm
Half Dice
3/8" x 1-1/8" x 7/8"
0.95 x 2.86 x
2.22 cm
Q R 0450 A
ICE MACHINE
MODEL
ICE CUBE SIZE
R REGULAR
D DICE
Y HALF DICE
# C U B E S I Z E
0 REGULAR
1 REGULAR
2 DICE
3 DICE
4 HALF-DICE
5 HALF-DICE
CONDENSER TYPE
AIR-COOLED
WATER-COOLED
AIR-COOLED
WATER-COOLED
AIR-COOLED
WATER-COOLED
A SELF-CONTAINED AIR-COOLED
W SELF-CONTAINED WATER-COOLE
D
N REMOTE AIR-COOLED
9 REMOTE AIR-COOLED
CONDENSER TYPE
ICE MACHINE
SERIES

–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.
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
REGISTRATION CARD as soon as possible to
validate the installation date.

–3–
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.

–4–
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 the ice machine
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 Distributor or the Service
Department at Manitowoc Ice, Inc.

–5–
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.
•The location must not obstruct air flow through or
around the ice machine. Refer to chart below for
clearance requirements.
•The ice machine must be protected if it will be
subjected to temperatures below 32°F (0°C). Failure
caused by exposure to freezing temperatures is not
covered by the warranty. See “Removal from
Service/Winterization”
ICE MACHINE HEAD SECTION CLEARANCE
REQUIREMENTS
Q1600 is not available as an air-cooled model.
Q370 Self-Contained
Air-Cooled Water-Cooled
Top/Sides 12" (30.5 cm) 5" (12.7 cm)
Back 5" (12.7 cm) 5" (12.7 cm)
Q1300 Q1600
Q1800
Self-Contained
Air-Cooled
Water-Cooled
and Remote
Top/Sides 24" (61 cm) 8" (20.3 cm)
Back 12" (30.5 cm) 5" (12.7 cm)
All other
Q models
Self-Contained
Air-Cooled
Water-Cooled
and Remote
Top/Sides 8" (20.3 cm) 5" (12.7 cm)
Back 5" (12.7 cm) 5" (12.7 cm)

–6–
STACKING TWO ICE MACHINES ON A
SINGLE STORAGE BIN
A stacking kit is required for stacking two ice
machines. Installation instructions are supplied with
the stacking kit.
Q1600 is not available as an air-cooled model.
Q450/Q600/
Q800/Q1000
Stacked
Self-Contained
Air-Cooled
Stacked
Water-Cooled and
Remote
Top/Sides 16" (40.64 cm) 5" (12.70 cm)
Back 5" (12.70 cm) 5" (12.70 cm)
Q1300
Q1600
Q1800
Stacked
Self-Contained
Air-Cooled
Stacked
Water-Cooled and
Remote
Top/Sides 48" (121.92 cm) 24" (60.96 cm)
Back 12" (30.48 cm) 12" (30.48 cm)

–7–
Calculating Remote Condenser
Installation Distances
LINE SET LENGTH
The maximum length is 100' (30.5 m).
The ice machine compressor must have the proper oil
return. 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' (30.5 m).
LINE SET RISE/DROP
The maximum rise is 35' (10.7 m).
The maximum drop is 15' (4.5 m).
!
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.

–8–
CALCULATED LINE SET DISTANCE
The maximum calculated distance is 150' (45.7 m).
Line set rises, drops, horizontal runs (or combinations
of these) in excess of the stated maximums will
exceed compressor start-up and design limits. This will
cause poor oil return to the compressor.
Make the following calculations to make sure the line
set layout is within specifications.
1. Insert the measured rise into the formula below.
Multiply by 1.7 to get the calculated rise.
(Example: A condenser located 10 feet above the
ice machine has a calculated rise of 17 feet.)
2. Insert the measured drop into the formula below.
Multiply by 6.6 to get the calculated drop.
(Example. A condenser located 10 feet below the
ice machine has a calculated drop of 66 feet.)
3. Insert the measured horizontal distance into the
formula below. No calculation is necessary.
4. Add together the calculated rise, calculated drop,
and horizontal distance to get the total
calculated distance. If this total exceeds 150'
(45.7 m), move the condenser to a new location
and perform the calculations again.
MAXIMUM LINE SET DISTANCE FORMULA
Step 1.
Measured Rise ____ X 1.7 = ______Calculated Rise
(35 ft. Max)
Step 2.
Measured Drop ____ X 6.6 = ______Calculated Drop
(15 ft. Max.)
Step 3.
Measured Horizontal Distance = _________Horizontal
(100 ft. Max.) Distance
Step 4.
Total Calculated Distance = ________Total Calculated
(150 ft. Max.) Distance

–9–
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