Hoshizaki KM-320MAH User manual

™
INSTRUCTION MANUAL
ISSUED: August 11, 2005
KM-320MAH
KM-320MWH
MODULAR CRESCENT CUBER
Reliability is a
beautiful thingTM
REVISED: NOV. 5, 2003

2
IMPORTANT
Only qualified service technicians should attempt to install, service or maintain
this icemaker. No installation, service or maintenance should be undertaken
until the technician has thoroughly read this Instruction Manual. Likewise, the
owner/manager should not proceed to operate the icemaker until the installer
has instructed them on its proper operation.
HOSHIZAKI provides this manual primarily to assist qualified service technicians in the
installation, maintenance and service of the icemaker.
Should the reader have any questions or concerns which have not been satisfactorily
addressed, please call or write to the HOSHIZAKI Technical Support Department for
assistance.
HOSHIZAKI AMERICA, INC.
618 Highway 74 South
Peachtree City, GA 30269
Attn: HOSHIZAKI Technical Support Department
Phone: [phone] Technical Service
[phone]
Fax: [phone]
[phone]
Web Site: www.hoshizakiamerica.com
NOTE: To expedite assistance, all correspondence/communication MUST include the
following information:
• Model Number
• Serial Number
• Complete and detailed explanation of the problem

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• Please review this manual. It should be read carefully before the icemaker is installed
and operated. Only qualified service technicians should install, service and maintain
the icemaker. This manual should be made available to the technician prior to
installation, maintenance or service.
• Keep this manual with the icemaker for later reference.
CONTENTS
I. Specifications ...................................................................................................................... 4
A. Nameplate Rating ......................................................................................................... 4
1. KM-320MAH (air-cooled) ......................................................................................... 4
2. KM-320MWH (water-cooled) ................................................................................... 5
B. Dimensions/Connections .............................................................................................. 6
1. KM-320MAH ............................................................................................................ 6
2. KM-320MWH ........................................................................................................... 7
II. Installation and Operating Instructions .............................................................................. 8
A. Checks Before Installation ............................................................................................ 8
B. How To Remove Panels ................................................................................................ 8
C. Location ........................................................................................................................ 9
D. Setup ............................................................................................................................. 9
E. Electrical Connection .................................................................................................. 10
F. Water Supply and Drain Connections .......................................................................... 11
G. Final Checklist ............................................................................................................ 13
H. Startup ........................................................................................................................ 14
I. Preparing the Icemaker for Long Storage .................................................................... 15
III. Cleaning and Maintenance ............................................................................................. 17
A. Cleaning Instructions .................................................................................................. 17
1. Cleaning Procedure ............................................................................................... 17
2. Sanitizing Procedure - Following Cleaning Procedure .......................................... 20
B. Maintenance ................................................................................................................ 21

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I. Specifications
A. Nameplate Rating
1. KM-320MAH (air-cooled)
See the nameplate for electrical and refrigeration specifications. This nameplate is located
on the upper right hand side of the rear panel. Since this nameplate is located on the rear
panel of the icemaker, it cannot be read when the back of the icemaker is against a wall
or against another piece of kitchen equipment. Therefore, the necessary electrical and
refrigeration information is also on the rating label, which can be seen easily by removing
only the front panel of the icemaker.
We reserve the right to make changes in specifications and design without prior notice.
HOSHIZAKI ICE MAKER
MOTOR-COMPRESSOR THERMALLY PROTECTED,
NOT INTENDED FOR OUTDOOR USE!
Hoshizaki America, Inc.
Peachtree City, GA
www.hoshizaki.com
LISTED
ICE MAKER
WITHOUT
STORAGE
MEANS
946Z
MODEL NUMBER KM-320MAH
SERIAL NUMBER
AC SUPPLY VOLTAGE 115-120/60/1
COMPRESSOR 115V 8.2RLA 33.6LRA
PUMP 120V 0.5FLA 10W
FAN 120V 0.85FLA 50W
OTHER 115-120V 0.2A
MAXIMUM FUSE SIZE 20 AMPS
MAX. HACR BREAKER(USA ONLY) 20 AMPS
MAX. CIRC. BREAKER (CANADA ONLY) 20 AMPS
MINIMUM CIRCUIT AMPACITY 20 AMPS
DESIGN PRESSURE HI-467PSI LO-210PSI
REFRIGERANT 404A 1 lb. 4.3 oz

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2. KM-320MWH (water-cooled)
See the nameplate for electrical and refrigeration specifications. This nameplate is located
on the upper right hand side of the rear panel. Since this nameplate is located on the rear
panel of the icemaker, it cannot be read when the back of the icemaker is against a wall
or against another piece of kitchen equipment. Therefore, the necessary electrical and
refrigeration information is also on the rating label, which can be seen easily by removing
only the front panel of the icemaker.
We reserve the right to make changes in specifications and design without prior notice.
HOSHIZAKI ICE MAKER
MOTOR-COMPRESSOR THERMALLY PROTECTED,
NOT INTENDED FOR OUTDOOR USE!
Hoshizaki America, Inc.
Peachtree City, GA
www.hoshizaki.com
LISTED
ICE MAKER
WITHOUT
STORAGE
MEANS
946Z
MODEL NUMBER KM-320MWH
SERIAL NUMBER
AC SUPPLY VOLTAGE 115-120/60/1
COMPRESSOR 120V 7.5RLA 33.6LRA
PUMP 120V 0.5FLA 10W
OTHER 115-120V 0.2A
MAXIMUM FUSE SIZE 20 AMPS
MAX. HACR BREAKER(USA ONLY) 20 AMPS
MAX. CIRC. BREAKER (CANADA ONLY) 20 AMPS
MINIMUM CIRCUIT AMPACITY 20 AMPS
DESIGN PRESSURE HI-427PSI LO-210PSI
REFRIGERANT 404A 1 lb. 0.8 oz

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B. Dimensions/Connections
1. KM-320MAH
Unit: inches (mm.)

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2. KM-320MWH Unit: inches (mm.)

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Fig. 1
II. Installation and Operating Instructions
IMPORTANT
Only qualified service technicians should attempt to install, service or maintain
the icemaker. No installation, service or maintenance should be undertaken
until the technician has thoroughly read this Instruction Manual.
A. Checks Before Installation
IMPORTANT
1. Remove shipping carton, tape(s) and packing. If packing material is left in the
icemaker, it will not work properly.
2. Ensure all components, fasteners and thumbscrews are securely in place.
1) Remove the panels to prevent damage when installing the icemaker. See "B. How To
Remove Panels."
2) Remove the package containing the accessories.
3) Remove the protective plastic film from the panels. If the icemaker is exposed to the sun
or to heat, remove the film after the icemaker cools.
4) Check that the refrigerant lines do not rub or touch lines or other surfaces, and that the
fan blade turns freely.
5) Check that the compressor is snug on all mounting pads.
6) See the nameplate on the rear panel, and check that your voltage supplied corresponds
with the voltage specified on the nameplate.
7) This icemaker needs a storage bin. The recommended storage bin is HOSHIZAKI ICE
STORAGE BIN, Model B-300 series.
B. How To Remove Panels
See Fig. 1
• Front Panel: Remove the screw. Lift up and pull
towards you.
• Top Panel: Lift up the front slightly, push away, and
then lift off.
• Side Panel (R): Remove the screw. Pull slightly
towards you, and lift off.
• Insulation Panel: Lift up slightly, and pull towards you.
• Base Cover: Lift up slightly, and pull towards you.

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Icemaker
Bin
Bolts
Mounting
Brackets
C. Location
IMPORTANT
This icemaker is not intended for outdoor use. Normal operating ambient
temperature should be within +45°F to +100°F; Normal operating water
temperature should be within +45°F to +90°F. Operation of the icemaker, for
extended periods, outside of these normal temperature ranges may affect
production capacity.
For best operating results:
• Icemaker should not be located next to ovens, grills or other high heat producing
equipment.
• Location should provide a firm and level foundation for the equipment.
• Allow 6" clearance at rear, sides and top for proper air circulation and ease of
maintenance and/or service should they be required.
D. Setup
1) Unpack the storage bin, and attach the four adjustable legs provided (bin accessory) to
the bottom of the storage bin.
2) Position the storage bin in the selected permanent position.
3) Place the icemaker on the top of the storage bin.
4) Secure the icemaker to the storage bin, by using the two mounting bracket and the four
bolts provided. See Fig. 2.
5) Level the icemaker/storage bin in both the left-to-right and front-to-rear directions.
Adjust the ice bin legs to make the icemaker level.
6) Replace the panels in their correct positions.
Fig. 2

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Fig. 3
E. Electrical Connection
WARNING
1. Electrical connection must be made in accordance with the instructions on
the "WARNING" tag, provided with the pigtail leads in the junction box.
2. This icemaker requires a ground that meets the national and local electrical
code requirements. To prevent possible electrical shock to individuals or
extensive damage to the equipment, install a proper ground wire to the
icemaker.
• The white lead must be connected to the neutral conductor of the power source. Miswiring
results in severe damage to the icemaker. See Fig. 3.
• This icemaker must have a separate power supply or receptacle of proper capacity. See
the nameplate.
• The opening for the power supply connection is 7/8" DIA to fit a 1/2" trade size conduit.
• Usually an electrical permit and services of a licensed electrician are required.

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F. Water Supply and Drain Connections
See Fig. 4
IMPORTANT
To prevent damage to the pump assembly, do not operate the icemaker when
the water supply is OFF, or if the pressure is below 10 PSIG. Do not run the
icemaker until the proper water pressure is reached.
• Water supply inlet is 1/2" female pipe thread (FPT).
Note: On water-cooled model, two water supply inlets are provided. One is for the ice
making water inlet, and the other is for the cooling water inlet.
• A water supply line shut-off valve and drain valve should be installed. A minimum of
3/8"
OD copper tubing is recommended for the water supply lines.
Note: An optional strainer should be installed next to the water supply inlet in the water
supply line: HOSHIZAKI recommended optional strainer Part Code 311166A01.
• Water supply pressure should be a minimum of 10 PSIG and a maximum of 113 PSIG. If
the pressure exceeds 113 PSIG, the use of a pressure reducing valve is required.
• Drain outlet for icemaker dump is 3/4" FPT. The drain for condensation is a 3/8" ID pipe.
The icemaker drain and the condenser drain piping connections must be made separately
from the bin drain.
Note: On water-cooled model, a 3/8" FPT is provided for the condenser drain outlet.
• The drains must have 1/4" fall per foot on horizontal runs to get a good flow.
• The drains should not be piped directly to the sewer system. An air gap of a minimum of 2
vertical inches should be between the end of the drain pipe from the icemaker or the ice
bin and the floor drain.
• This icemaker should be installed in accordance with applicable national, state and local
regulations.
• A plumbing permit and services of a licensed plumber may be required in some areas.
• In some areas, a back flow preventer may be required in the cooling water circuit.

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KM-320MWH
Fig. 4
KM-320MAH

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G. Final Checklist
1) Is the icemaker level?
2) Is the icemaker in a site where the ambient temperature is within +45°F to +100°F and
the water temperature within +45°F to +90°F all year around?
3) Is there at least 6" clearance at sides, rear and top of the icemaker for maintenance or
service?
4) Have all shipping carton, tapes and packing been removed from the icemaker? Is the
cube guide in its correct position?
5) Are all components, fasteners and thumbscrews securely in place?
6) Have all electrical and piping connections been made?
7) Has the power supply voltage been checked or tested against the nameplate rating?
And has a proper ground been installed in the icemaker?
8) Are the water supply line shut-off valve and drain valve installed? Has the water
supply pressure been checked to ensure a minimum of 10 PSIG and a maximum of
113 PSIG?
Note: The icemaker may stop running when the water supply is OFF, or if the pressure
is below 10 PSIG. When the proper water pressure is reached, the icemaker
automatically starts running again.
9) Have the compressor hold-down bolts and refrigerant lines been checked against
vibration and possible failure?
10) Has the bin control switch been checked for correct operation? When the icemaker is
running, hold an ice cube in contact with the bulb. The icemaker should stop within 6 to
10 seconds.
11) Has the end user been given the instruction manual, and instructed on how to operate
the icemaker and the importance of the recommended periodic maintenance?
12) Has the end user been given the name and telephone number of an authorized service
agent?
13) Has the warranty tag been filled out and forwarded to the factory for warranty
registration?

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H. Startup
IMPORTANT
1. All parts are factory-adjusted. Improper adjustments may result in failure.
2. If the unit is turned off, wait for at least 3 minutes before restarting the
icemaker to prevent damage to the compressor.
3. Do not operate the unit in the "WASH" position without water in the water
tank. This will cause damage to the water pump seal.
1) Open the water supply line shut-off valve. See Fig. 4.
2) Remove the front panel by removing the screw at the bottom of the panel, swinging the
panel out and lifting it up. See Fig. 5.
3) Move the control switch on the control box,
to the “ICE” position.
4) Replace the front panel in its correct
position.
5) Turn on the power supply, and allow
the water tank to fill with water and the
icemaker to operate for a total of 10
minutes.
6) Turn off the power supply, and remove the
front panel and the base cover. See Fig. 6
7) Remove the end of the pump tubing toward
the back of the machine, and drain the
water tank. See Fig. 7.
8) Replace the pump tubing in its correct
position.
9) Clean the storage bin.
10) Replace the base cover and the front
panel in their correct positions.
11) Turn on the power supply, and start the
automatic icemaking process.
OPEN
2
3
1
4
Base Cover
Fig. 6
Front Panel
Fig. 5

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Fig. 7
I. Preparing the Icemaker for Long Storage
IMPORTANT
When shutting off the icemaker for an extended time, drain out all water
from the water line and remove the ice from the storage bin. The storage bin
should be cleaned and dried. Drain the icemaker to prevent damage to the
water supply line at sub-freezing temperatures, using air or carbon dioxide.
Shut off the icemaker until the proper ambient temperature is resumed.
• When the icemaker is not used for two or three days, it is sufficient to only move the
control switch to the "OFF" position, unless the icemaker will be at sub-freezing
temperatures.
[1] On water-cooled model only, first remove the water from the water-cooled condenser:
1) Remove the front panel. See Fig. 5.
2) Move the control switch on the control box to the "OFF" position.
3) Wait 3 minutes.
4) Move the control switch to the "ICE" position.
5) Allow 5 minutes for the icemaker to fill with water and the water pump to start
operating.
6) Close the water-cooled condenser water supply line shut-off valve. See Fig. 4.
Do not pull out this end.
Pump Tubing
Pump Tubing

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7) Open the drain valve for the water-cooled condenser water supply line. See Fig. 4.
8) Allow the line to drain by gravity.
9) Attach compressed air or carbon dioxide supply to the condenser water line drain valve.
10) Quickly blow the water-cooled condenser out using compressed air or carbon dioxide
until water stops coming out.
[2] Remove the water from the potable water supply line:
1) Remove the front panel. (Already removed on water-cooled model.)
2) Move the control switch on the control box to the "OFF" position.
3) Wait 3 minutes.
4) Close the potable water supply line shut-off valve and open the potable water supply
line drain valve. See Fig. 4.
5) Allow the line to drain by gravity.
6) Attach compressed air or carbon dioxide supply to the potable water line drain valve.
7) Move the control switch to the "ICE" position.
8) Blow the potable water line out using compressed air or carbon dioxide.
[3] Drain the potable water tank:
1) Turn off the power supply.
2) Move the control switch on the control box to the "OFF" position.
3) Remove the base cover. See Fig. 6.
4) Remove the back end of the pump tubing, and drain the water tank. See Fig. 7.
5) Replace the pump tubing and the base cover in their correct positions.
6) Remove all ice from the storage bin and clean the storage bin.
7) Replace the front panel in its correct position.

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III. Cleaning and Maintenance
IMPORTANT
Ensure all components, fasteners and thumbscrews are securely in place after
any maintenance or cleaning is done to the equipment.
A. Cleaning Instructions
CAUTION
1. HOSHIZAKI recommends cleaning this unit at least once a year. More
frequent cleaning, however, may be required in some existing water
conditions.
2. To prevent injury to individuals and damage to the icemaker, do not use
ammonia type cleaners.
3. Always wear liquid-proof gloves to prevent the cleaning and sanitizing
solutions from coming into contact with skin.
1. Cleaning Procedure
1) Dilute approximately 16 fl. oz. of
recommended cleaner (“LIME-A-WAY,”
Economics Laboratory, Inc.) with 3 gal. of
water.
2) Remove all ice from the evaporator and the
storage bin.
Note: To remove cubes on the evaporator,
turn off the power supply and turn it
on after 3 minutes. The defrost cycle
starts and the cubes will be removed
from the evaporator.
3) Turn off the power supply.
4) Remove the front panel and the base
cover. See Figs. 5 and 6. Then remove the
insulation panel by lifting it up slightly and
pulling it toward you. See Fig. 8.
Insulation Panel
Fig. 8

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5) Remove the back end of the pump tubing.
Drain the water tank. Replace the pump
tubing in its correct position. See Fig. 7.
6) Pour the cleaning solution into the water
tank. See Fig. 9.
7) Fully open the cleaning valve on the left
side wall of the machine compartment.
See Fig. 10.
IMPORTANT
1. The cleaning valve is used to provide access to the inside of the evaporator
during the cleaning and sanitizing operation. It should be closed for all
icemaking operation. The compressor will not operate unless this valve is
completely closed.
2. To open the cleaning valve, the valve handle should be parallel to the valve
body. To close the valve, the valve handle should be at a right angle to the
valve body.
Fig. 10
Fig. 9
Cleaning Solution

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8) Move the control switch on the control box to the “WASH” position.
9) Replace the insulation panel and the front panel in their correct positions.
10) Turn on the power supply, and start the washing process.
11) Turn off the power supply after 30 minutes.
12) Remove the front panel.
13) Remove the back end of the pump tubing. Drain the water tank. Replace the pump
tubing in its correct position.
14) Move the control switch to the “ICE” position.
15) Close the cleaning valve. See Fig 10.
16) Replace the front panel in its correct position.
17) Turn on the power supply to fill the water tank with water.
18) Turn off the power supply after 3 minutes.
19) Remove the front panel, and fully open the cleaning valve.
20) Move the control switch to the “WASH” position.
21) Replace the front panel in its correct position.
22) Turn on the power supply to rinse off the cleaning solution.
23) Turn off the power supply after 5 minutes.
24) Remove the front panel.
25) Remove one end of the pump tubing. Drain the water tank. Replace the pump tubing in
its correct position.
26) Repeat the above steps 14) through 25) three more times to rinse thoroughly.
Note: If you do not sanitize the icemaker, go to step 10) in “2. Sanitizing Procedure.”

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2. Sanitizing Procedure - Following Cleaning Procedure
1) Dilute approximately 1.5 fl. oz. of a 5.25% sodium hypochlorite solution (chlorine
bleach) with 3 gal. of water.
2) Remove the insulation panel.
3) Pour the sanitizing solution into the water tank. See Fig. 9.
4) Replace the insulation panel and the front panel in their correct positions.
Note: Make sure that the control switch is in the “WASH” position and the cleaning valve
is open.
5) Turn on the power supply, and start the sanitizing process.
6) Turn off the power supply after 15 minutes.
7) Remove the front panel.
8) Remove one end of the pump tubing. Drain the water tank. Replace the pump tubing in
its correct position.
9) Repeat the above steps 14) through 25) in “1. Cleaning Procedure” two times to rinse
thoroughly.
10) Close the cleaning valve.
11) Move the control switch to the “ICE” position.
12) Replace the front panel and the base cover in their correct positions.
13) Clean the storage bin with water.
14) Turn on the power supply, and start the automatic icemaking process.