Hoshizaki KML-451MWH User manual

Hoshizaki
“A Superior Degree
of Reliability”
www.hoshizaki.com
Models
KML-451MAH
KML-451MWH
Modular Crescent Cuber
Hoshizaki America, Inc.
Issued: 2-7-2006
INSTRUCTION MANUAL
™

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.hoshizaki.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. KML-451MAH (air-cooled) ....................................................................................... 4
2. KML-451MWH (water-cooled) ................................................................................. 5
B. Dimensions/Connections .............................................................................................. 6
1. KML-451MAH .......................................................................................................... 6
2. KML-451MWH ......................................................................................................... 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 Instructions ......................................................................... 17
A. Cleaning Instructions .................................................................................................. 17
1. Cleaning Procedure ............................................................................................... 17
2. Sanitizing Procedure - Following Cleaning Procedure .......................................... 18
B. Maintenance ................................................................................................................ 19

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I. Specifications
A. Nameplate Rating
1. KML-451MAH (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 easily seen 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 KML-451MAH
SERIAL NUMBER
AC SUPPLY VOLTAGE 115-120/60/1
COMPRESSOR 115-120V 10.3RLA 51LRA
PUMP 120V 0.6FLA 14W
FAN 120V 0.85FLA 50W
OTHER 115-120V 0.15A
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-450PSI LO-206PSI
REFRIGERANT 404A 1 LB. 13 OZ.

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2. KML-451MWH (water-cooled)
See the nameplate for electrical and refrigeration specifications. This nameplate is located
on the upper right hand side of 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 easily seen 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 KML-451MWH
SERIAL NUMBER
AC SUPPLY VOLTAGE 115-120/60/1
COMPRESSOR 115-120V 8.9RLA 51LRA
PUMP 120V 0.6FLA 14W
FAN --- --- ---
OTHER 115-120V 0.15A
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-206PSI
REFRIGERANT 404A 1 LB. 2 OZ.

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B. Dimensions/Connections
1. KML-451MAH
Unit: inches (mm)

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Unit: inches (mm)
2. KML-451MWH

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II. Installation and Operating Instructions
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
after any maintenance or cleaning is done to the equipment.
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-500 series, DB-200, or DM-180.
B. How to Remove Panels
See Fig. 1
• Front Panel: Remove the screw. Lift up and pull
towards you.
• Top Panel: Lift its front up 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.
Fig. 1

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C. Location
WARNING
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 universal braces and the two
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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E. Electrical Connection
WARNING
1. Electrical connection must be made in accordance with the instructions on
the "WARNING" tag, provided with the pig tail 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" diameter to fit a 1/2" trade size
conduit.
• Usually, an electrical permit and services of a licensed electrician are required.
Fig. 3

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F. Water Supply and Drain Connections
See Fig. 4
IMPORTANT
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.
• 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 icemaker drain 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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Fig. 4
KML-451MWH
KML-451MAH

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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 3 to
10 seconds. Adjustment may be needed, particularly at higher altitude locations.
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
CAUTION
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.
1) Open the water supply line shut-off valve.
2) Remove the front panel.
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 start the washing process for 10 minutes.
6) Turn off the power supply.
7) Remove the front panel.
8) Move the control switch to the "SERVICE" position. Then move the service switch to the
"DRAIN" position.
9) Replace the front panel in its correct position.
10) Turn on the power supply for 2 minutes to allow the icemaker to drain.
11) Turn off the power supply and remove the front panel.
12) Move the control switch on the control box to the "ICE" position.
13) Replace the front panel in its correct position and turn on the power supply.

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I. Preparing the Icemaker for Long Storage
CAUTION
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) Turn off the power supply.
2) Remove the front panel.
3) Move the control switch on the control box to the "OFF" position.
4) Wait 3 minutes.
5) Move the control switch to the "ICE" position.
6) Replace the front panel and turn on the power supply.
7) Allow 5 minutes for the icemaker to fill with water and the water pump to start operating.
8) Close the water-cooled condenser water supply line shut-off valve. See Fig. 4.
9) Open the drain valve for the water-cooled condenser water supply line.
10) Allow the line to drain by gravity.
11) Quickly attach compressed air or carbon dioxide supply to the condenser water line
drain valve.
12) 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) Turn off the power supply and remove the front panel.
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) Replace front panel and turn on the power supply.
9) Blow the potable water line out using compressed air or carbon dioxide.

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3. Drain the potable water tank:
1) Turn off the power supply.
2) Remove the front panel.
3) Move the control switch to "SERVICE" and move the service switch to the "DRAIN"
position.
4) Replace the front panel and turn on the power supply for 2 minutes.
5) Turn off the power supply.

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III. Cleaning and Maintenance Instructions
IMPORTANT
Ensure all components, fasteners and thumbscrews are securely in place after
any maintenance or cleaning is done to the equipment.
A. Cleaning Instructions
WARNING
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 10.5 fl. oz. of recommended cleaner Hoshizaki "Scale Away" or
"LIME-A-WAY," (Economics Laboratory, Inc.) with 2 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.
5) Place the control switch in the "SERVICE" position. Then place the service switch in the
"DRAIN" position.
6) Replace the front panel in its correct position and turn on the power supply for 2 minutes.
7) Turn off the power supply.
8) Remove the front panel and then remove the insulation panel by lifting up the panel
slightly and pulling it towards you.
9) Pour the cleaning solution into the water tank.
10) Move the service switch to the "WASH" position.
11) Replace the insulation panel and the front panel in their correct positions.
12) Turn on the power supply and start the washing process.
13) Turn off the power supply after 30 minutes.
14) Remove the front panel.
15) Move the service switch to the "DRAIN" position.
16) Replace the front panel in its correct position and turn on the power supply for 2 minutes.

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17) Turn off the power supply and remove the front panel.
18) Move the control switch to the "ICE" position.
19) Replace the front panel in its correct position.
20) Turn on the power supply to fill the water tank with water.
21) Turn off the power supply after 3 minutes.
22) Remove the front panel.
23) Place the control switch in the "SERVICE" position. Then place the service switch in the
"WASH" position.
24) Replace the front panel in its correct position.
25) Turn on the power supply to rinse off the cleaning solution.
26) Turn off the power supply after 5 minutes.
27) Remove the front panel.
28) Move the service switch to the "DRAIN" position.
29) Replace the front panel in its correct position and turn on the power supply for 2 minutes.
30) Turn off the power supply.
31) Remove the front panel.
32) Repeat steps 18 through 31 three more times to rinse thoroughly.
Note: If you do not sanitize the icemaker, go to step 14 in "2. Sanitizing Procedure."
2. Sanitizing Procedure - Following Cleaning Procedure
1) Dilute a 5.25% sodium hypochlorite solution (chlorine bleach) with water (add 1.0 fl. oz.
to 2 gal. of water).
2) Remove the insulation panel.
3) Pour the sanitizing solution into the water tank.
4) Move the service switch to the "WASH" position.
5) Replace the insulation panel and the front panel in their correct positions.
6) Turn on the power supply and start the sanitizing process.
7) Turn off the power supply after 15 minutes.
8) Remove the front panel.
9) Move the service switch to the "DRAIN" position.
10) Replace the front panel in its correct position and turn on the power supply for 2 minutes.
11) Turn off the power supply.
12) Remove the front panel.
13) Repeat steps 18 through 31 in "1. Cleaning Procedure" two times to rinse thoroughly.
14) Move the control switch to the "ICE" position.
15) Replace the front panel in its correct position.
16) Clean the storage bin with water.
17) Turn on the power supply and start the automatic icemaking process.

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B. Maintenance
IMPORTANT
This icemaker must be maintained individually, referring to the instruction manual
and labels provided with the icemaker.
1. Stainless Steel Exterior
To prevent corrosion, wipe the exterior occasionally with a clean and soft cloth. Use a
damp cloth containing a neutral cleaner to wipe off oil or dirt build up.
2. Storage Bin and Scoop
• Wash your hands before removing ice. Use the plastic scoop provided (accessory).
• The storage bin is for ice use only. Do not store anything else in the bin.
• Keep the scoop clean. Clean it by using a neutral cleaner and rinse thoroughly.
• Clean the bin liner by using a neutral cleaner. Rinse thoroughly after cleaning.
3. Air Filter (air-cooled model only)
A plastic mesh air filter removes dirt or dust from the air, and keeps the condenser from
getting clogged. As the filter gets clogged, the icemaker's performance will be reduced.
Check the filter at least twice a month. When clogged, use warm water and a neutral
cleaner to wash the filter.
4. Condenser (air-cooled model only)
Check the condenser once a year, and clean if required by using a brush or vacuum
cleaner. More frequent cleaning may be required depending on the location of the
icemaker.

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HOSHIZAKI AMERICA, INC.
618 Hwy. 74 S., Peachtree City, GA 30269 USA TEL [phone] FAX [phone] www.hoshizaki.com 91A1BG10A