Compact CMS050A004 User manual

CM050
CM Model
Ice Machines
This manual is updated as new
Information and models are released
Visit our website for the latest manual:
www.compact-ice.com
STH003
06/06
©Manitowoc Ice, Inc.

2
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.

3
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:
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.
NOTE: Text set off as a Note provides you with
simple, but useful extra information about the
procedure you are performing.

4
Read These Before Proceeding:
CAUTION
Proper installation, care and maintenance are
essential for maximum ice production and trouble
free operation of your Compact Ice Machine. Read
and understand this manual. 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.
We reserve the right to make product improvements at
any time. Specifications and design are subject to
change without notice.
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 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 US Government Environmental
Protection Agency (EPA) certified in proper
refrigerant handling and servicing procedures.

5
TABLE OF CONTENTS
GENERAL INFORMATION............................. 7
MODEL NUMBERS.....................................7
ACCESSORIES...........................................8
MODEL/SERIAL NUMBER LOCATION .......9
OWNER WARRANTY REGISTRATION........... 9
INSTALLATION .......................................... 13
LOCATION OF ICE MACHINE ..................13
ICE MACHINE HEAT OF REJECTION ......14
LEVELING THE ICE MACHINE ................15
WATER SERVICE/DRAINS .......................16
ELECTRICAL REQUIREMENTS................18
COMPONENT IDENTIFICATION ..............19
OPERATIONAL CHECKS ........................19
MAINTENANCE .......................................... 23
ICE MACHINE INSPECTION ....................23
EXTERIOR CLEANING.............................23
CLEANING THE CONDENSER .................23
INTERIOR CLEANING AND SANITIZING.25
CLEANING PROCEDURE .........................28
REMOVAL OF PARTS FOR CLEANING AND
SANITIZING.............................................31
ICE MAKING SEQUENCE OF OPERATION.. 39
TROUBLESHOOTING ................................. 41
DIAGNOSING AN ICE MACHINE THAT
WILL NOT RUN........................................41
ICE MACHINE WILL NOT HARVEST........43
ICE QUALITY IS POOR – CUBES ARE
SHALLOW, INCOMPLETE OR WHITE ......44
FREEZE CYCLE IS LONG, LOW ICE
PRODUCTION ..........................................45
ICE MACHINE RUNS & NO ICE IS
PRODUCED..............................................46
ANALYZING DISCHARGE PRESSURE.....47
ANALYZING SUCTION PRESSURE .........49

6
HOT GAS VALVE..................................... 52
BIN THERMOSTAT.................................. 55
ICE PRODUCTION CHECK ...................... 57
ADJUSTING CUBE WEIGHT ................... 58
LIQUID LINE THERMISTOR .................... 59
TOTAL SYSTEM REFRIGERATION
CHARGE.................................................. 61
COMPONENT SPECIFICATIONS AND CHECK
PROCEDURES ............................................ 62
MAIN FUSE ............................................. 62
COMPRESSOR ELECTRICAL
DIAGNOSTICS......................................... 63
DIAGNOSING START COMPONENTS: .... 65
CYCLE TIMES, 24 HR ICE PRODUCTION AND
REFRIGERANT PRESSURE CHARTS .......... 66
REFRIGERANT DEFINITIONS ..................... 68
REFRIGERANT RE-USE POLICY ............. 69
SYSTEM CONTAMINATION CLEANUP ... 75
SEVERE SYSTEM CONTAMINATION
CLEANUP PROCEDURE ..................ERROR!
BOOKMARK NOT DEFINED.
REPLACING PRESSURE CONTROLS
WITHOUT REMOVING REFRIGERANT
CHARGE.................................................. 80
BRAZING PROCEDURES FOR DANFOSS
SOLENOID VALVES ................................ 82
FILTER-DRIERS....................................... 84
CONTROL BOARD ...................................... 85
WIRING DIAGRAMS .................................... 88
TUBING SCHEMATIC.................................. 87

7
GENERAL INFORMATION
MODEL NUMBERS
This manual covers the following models:
CMS050A004
WARNING
An ice machine contains high voltage electricity
and refrigerant charge. Repairs are to be
performed by properly trained refrigeration
technicians aware of the dangers of dealing with
high voltage electricity and refrigerant under
pressure.

8
ACCESSORIES
Visit our website at: www.compact-ice.com for these
optional accessories:
LEGS
Four inch adjustable legs are available.
DRAIN PUMP
Pumps waste water from ice machine to drain.
MANITOWOC ICE MACHINE CLEANER AND
SANITIZER
These are the only cleaner and sanitizer approved for
use with Compact products.
Cleaner Part Number Sanitizer Part Number
16oz 000000084 16oz 94-0565-3
CAUTION
Use only Manitowoc approved Ice Machine
Cleaner (part number 94-0546-3 original green
ice machine cleaner or 000000084 clear metal
safe ice machine cleaner) 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.

9
MODEL/SERIAL NUMBER LOCATION
The model and serial numbers are required when
requesting information from your local Compact retailer
or Compact Ice at 800-235-9698. The model and serial
number are listed on the MODEL/SERIAL NUMBER
DECAL affixed to the ice machine
MODEL/SERIAL
NUMBER DECAL
MODEL/SERIAL
NUMBER DECAL

10
OWNER WARRANTY REGISTRATION
CARD
GENERAL
The packet containing this manual also includes
warranty information. Warranty coverage begins the
day you purchase your new ice machine.
Compact CM Series
Limited Ice Machine Warranty
Subject to the exclusions and limitations below,
Manitowoc Ice, Inc. (“Manitowoc Ice”) warrants this
CM Series Ice Machine (the “Product”) against
defects in material or workmanship as follows:
1. Labor. For a period of ninety (90) days from the
date of purchase by the consumer (“Purchaser”),
if the Product is determined to be defective,
Manitowoc Ice shall, at its option, replace the
Product or pay the labor charges to any authorized
Manitowoc Ice service facility to repair the
Product. After expiration of the ninety day (90)
period referred above, the Purchaser must pay all
labor charges.
2. Parts. In addition, for a period of twelve (12)
months from the date of purchase by the
Purchaser, if the Product is determined to be
defective, Manitowoc Ice shall, at its option,
replace the Product or provide new or rebuilt
replacement parts for the Product at no charge.
REPAIR OR REPLACEMENT AS PROVIDED ABOVE
IS THE PURCHASER’S SOLE AND EXCLUSIVE
REMEDY UNDER THIS LIMITED WARRANTY.

11
This limited warranty only applies to the original
Purchaser of the Product and is not transferable. This
limited warranty is valid only in the United States. This
limited warranty does not apply to: (1) any cost or
expense associated with shipping, accessing,
removing, installing or reinstalling the Product to obtain
warranty service, including, without limitation,
expenses related to remodeling or repairing any
flooring, cabinetry or the like; (2) periodic or routine
maintenance; (3) repair or replacement of the Product
or parts due to normal wear and tear; (4) defects or
damage to the Product or parts resulting from misuse,
abuse, neglect, or accidents; (5) defects or damage to
the Product or parts resulting from improper or
unauthorized alterations, modifications, or changes; (6)
any Product that has not been installed in accordance
with the instruction manual or technical instructions
provided by Manitowoc Ice; and (7) any Product that
has not been maintained, cleaned or sanitized in
accordance with the instruction manual or technical
instructions provided by Manitowoc Ice. To the extent
that warranty exclusions are not permitted under some
state laws, these limitations or exclusions may not
apply to you.
EXCEPT AS STATED IN THE FOLLOWING
SENTENCE, THIS LIMITED WARRANTY IS THE
SOLE AND EXCLUSIVE WARRANTY OF
MANITOWOC ICE WITH REGARD TO THE
PRODUCT. ALL IMPLIED WARRANTIES ARE
STRICTLY LIMITED TO THE DURATION OF THE
LIMITED WARRANTY APPLICABLE TO THE
PRODUCTS AS STATED ABOVE, INCLUDING BUT
NOT LIMITED TO, ANY WARRANTY OF
MERCHANTABILITY OR OF FITNESS FOR A
PARTICULAR PURPOSE. Some states do not allow
limitations on how long an implied warranty lasts, so
the above limitation may not apply to you.

12
IN NO EVENT SHALL MANITOWOC ICE OR ANY OF
ITS AFFILIATES BE LIABLE TO THE PURCHASER
OR ANY OTHER PERSON FOR ANY INCIDENTIAL,
CONSEQUENTIAL OR SPECIAL DAMAGES OF ANY
KIND ARISING FROM OR IN ANY MANNER
CONNECTED WITH THE PRODUCT, ANY BREACH
OF THIS LIMITED WARRANTY, OR ANY OTHER
CAUSE. Some states do not allow the exclusion or
limitation of incidental or consequential damages, so
the above limitation or exclusion may not apply to you.
This limited warranty gives the Purchaser specific legal
rights, and the Purchaser may also have rights that
vary from state to state or from one jurisdiction to
another. To obtain warranty service or information
regarding the Product, please contact us at:
MANITOWOC ICE, INC.
2110 So. 26th Street
P.O. Box 1720
Manitowoc, WI 54221-1720
Telephone: [phone]
In order to obtain warranty service, the Purchaser must
present proof of purchase which shows that the
Purchaser was the original purchaser and that the
Product is within the warranty periods described
above.
To secure prompt and continuing warranty service, the
warranty registration card must be completed and sent
to Manitowoc Ice within thirty (30) days from the date
of purchase by the Purchaser. Complete the enclosed
registration card and send it to Manitowoc Ice at the
address shown above. Retain a copy for your record.

13
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.
•Air temperature: must be at least 50ºF (10ºC) but
must not exceed 110ºF (43ºC).
•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.
Self-Contained
Air-Cooled
Self-Contained
Water-Cooled
Top/Sides 5" (127 mm)* 5" (127 mm)*
Back 5" (127 mm)* 5" (127 mm)*
*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.
CAUTION
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.

14
ICE MACHINE HEAT OF REJECTION
Heat of Rejection*
Air Conditioning** Peak
1,145 2,300
* B.T.U./Hour
** Because the heat of rejection varies during the
ice making cycle, the figure shown is an
average.
Ice machines, like other refrigeration equipment, reject
heat through the condenser. It is helpful to know the
amount of heat rejected by the ice machine when
sizing air conditioning equipment where self-contained
air-cooled ice machines are installed.

15
LEVELING THE ICE MACHINE
After moving the ice machine into the installation
location, it must be leveled for proper operation. Follow
these steps to level the ice machine:
1. Use a level to check the levelness of the ice
machine from front to back and from side to side.
2. If the ice machine is not level, adjust the leveling
glides or legs on each corner of the base of the ice
machine as necessary.
3. Check the levelness of the ice machine after each
adjustment.
4. Repeat steps 2 and 3 until the ice machine is level
from front to back and from side to side.
Levelers
Legs

16
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.
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.
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, 80 psig (5.5 bar) obtain a
water pressure regulator from your Manitowoc
distributor.
•Install a water shut-off valve for ice making potable
water.
•Insulate water inlet lines to prevent condensation.
•Local, state or city codes may require an air gap.
Contact a local plumber for code requirements.
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-inch drop per 5 feet 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.

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WATER SUPPLY AND DRAIN LINE
SIZING/CONNECTIONS
Tubing Size Up to
Ice Machine
Fitting
1/4" (.64 cm)
min. inside
diameter
3/4" (1.9 cm)
minimum inside
diameter
3/8" (.96 cm) ID
minimum
Ice Machine
Fitting
1/4" (.64 cm)
ID Copper
Tubing
3/4" (1.9 cm)
Hose Barb
3/8" (.96 cm)
Hose
Water
Pressure
20 psi (1.38 bar) Min
80 psi (5.5 bar) Max
----- -----
Water
Temperature
35°F (1.7°C) Min.
90°F (32.°C) Max.
-----.
-----
Ice Making
Water Inlet
Bin Drain
Drain Pump
Note: If air temperature is less than 60 F (15.5 C) water temperature must be equal or greater
than 50°F (10°C).

18
ELECTRICAL REQUIREMENTS
VOLTAGE
The maximum allowable voltage variation is ±10% of
the rated voltage on the ice machine model/serial
number plate at start-up (when the electrical load is
highest).
•A qualified electrician must determine proper
wire size dependent upon location, materials
used and length of run (minimum circuit
ampacity can be used to help select the wire
size).
•The maximum allowable voltage variation is
±10% of the rated voltage at ice machine
start-up (when the electrical load is highest).
•Check all green ground screws in the control
box and verify they are tight before starting
the ice machine.
MINIMUM CIRCUIT AMPACITY
The minimum circuit ampacity is used to help select
the wire size of the electrical supply. (Minimum circuit
ampacity is not the ice machine’s running amp load.)
ELECTRICAL SPECIFICATIONS
WARNING
The ice machine must be grounded in accordance
with national and local electrical code.
Ice
Machine
Voltage
Phase
Cycle
Max. Fuse/
Circuit
Breaker
Minimum
Circuit
Amps
CM50 115/1/60 15 amp 4.1
GFCI REQUIREMENTS
If GFCI (ground fault circuit interrupter) is required by
local electrical code, it must be a breaker type.

19
Bin L ight
Water
Sh utters
Water
Trou gh
Bin
Bin
Thermostat
Adjustment
Grill
Cont rol Panel
Evaporator
Compartment
Electrical
Drain
Pu mp
(O ptio nal)
Wate r
Pu mp
Drain
Water Inlet Refrigeration
Compression
COMPONENT IDENTIFICATION

20
Wat er
Shutter
Assembly
Evaporato
r
Water
Pump
Water Supply
Line
Spray Bar
Spray
Nozzles
Water
Shutt ers
Control
Board
Evaporator
Bucket
Not e: Evap or at or
removed for
clarity