Hoshizaki KML-250MAH User manual

ISSUED:
HOSHIZAKI
MODULAR CRESCENT CUBER
INSTRUCTION MANUAL
SEPT. 18, 2001
MODELS
KML-250MAH
KML-250MWH
TM

2
HOSHIZAKI AMERICA, INC.
618 Highway 74 South
Peachtree City, GA 30269
Attn: HOSHIZAKI Technical Support Department
Phone: [phone] Technical Service
[phone]
Fax: [phone]
NOTE: To expedite assistance, all correspondence/communication MUST include the following
information:
• Model Number
• Serial Number
• Complete and detailed explanation of the problem
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.
IMPORTANT

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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 future reference.
CONTENTS
PAGE
I. SPECIFICATIONS .................................................................................................... 4
1. NAMEPLATE RATING............................................................................................ 4
[a] KML-250MAH (Air-cooled) ................................................................................. 4
[b] KML-250MWH (Water-cooled) ........................................................................... 5
2. DIMENSIONS/CONNECTIONS.............................................................................. 6
[a] KML-250MAH..................................................................................................... 6
[b] KML-250MWH.................................................................................................... 7
II. INSTALLATION AND OPERATING INSTRUCTIONS ............................................. 8
1. CHECKS BEFORE INSTALLATION ....................................................................... 8
2. HOW TO REMOVE PANELS.................................................................................. 9
3. LOCATION.............................................................................................................. 9
4. SET UP ................................................................................................................. 10
5. ELECTRICAL CONNECTION ............................................................................... 10
6. WATER SUPPLY AND DRAIN CONNECTIONS................................................... 11
7. FINAL CHECK LIST .............................................................................................. 13
8. START UP............................................................................................................. 14
9. PREPARING THE ICEMAKER FOR LONG STORAGE ....................................... 16
III. CLEANING AND MAINTENANCE INSTRUCTIONS ............................................. 18
1. CLEANING INSTRUCTIONS ................................................................................ 18
[a] CLEANING PROCEDURE ............................................................................... 18
[b] SANITIZING PROCEDURE ............................................................................. 20
2. MAINTENANCE .................................................................................................... 21

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I. SPECIFICATIONS
1. NAMEPLATE RATING
[a]KML-250MAH(Air-cooled)
MODEL NUMBER
SERIAL NUMBER
AC SUPPLY VOLTAGE
COMPRESSOR
PUMP 120V
FAN
OTHER
MAXIMUM FUSE SIZE
MAX. HACR BREAKER (USA ONLY)
MAX. CIRC. BREAKER (CANADA ONLY)
MINIMUM CIRCUIT AMPACITY
DESIGN PRESSURE
REFRIGERANT R404A
MOTOR-COMPRESSOR THERMALLY PROTECTED
NOT INTENDED FOR OUTDOOR USE
KML-250MAH
115-120/60/1
115V 9.6 RLA 33.6 LRA
0.5 FLA 10W
120V 1 FLA 30W
115-120V 0.2A 20AMPS
20AMPS
20AMPS
20AMPS
HI-467PSI LO-230PSI
1 lb. 2 oz.
See the Nameplate for electrical and refrigeration speci-
fications. 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.

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MODEL NUMBER
SERIAL NUMBER
AC SUPPLY VOLTAGE
COMPRESSOR
PUMP
FAN
OTHER
MAXIMUM FUSE SIZE
MAX. HACR BREAKER (USA ONLY)
MAX. CIRC. BREAKER (CANADA ONLY)
MINIMUM CIRCUIT AMPACITY
DESIGN PRESSURE
REFRIGERANT R404A
MOTOR-COMPRESSOR THERMALLY PROTECTED
NOT INTENDED FOR OUTDOOR USE
[b] KML-250MWH (Water-cooled)
See the Nameplate for electrical and refrigeration speci-
fications. 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.
KML-250MWH
115-120/60/1
115V 6.7 RLA 33.6 LRA
120V 0.5 FLA 10W
- - - - - - - - -
115-120V 0.2A 20AMPS
20AMPS
20AMPS
20AMPS
HI-427PSI LO-210PSI
13.5 oz.

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2. DIMENSIONS/CONNECTIONS
[a] KML-250MAH
Unit: inches (mm.)

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[a] KML-250MWH
Unit: inches (mm.)

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II.INSTALLATION ANDOPERATINGINSTRUCTIONS
1. CHECKS BEFORE INSTALLATION
IMPORTANT
Remove shipping carton, tape(s) and packing. If packing material is left in the
icemaker, it will not work properly.
1) Remove the panels to prevent damage when installing the icemaker. See “2. HOW TO
REMOVE PANELS.”
2) Remove the package containing the accessories.
3) Release the Bin Switch assembly:
a) Remove the Bin Control Cover (See Fig. 1) to access the Bin Switch assembly.
b) Remove the shipping tape holding the switch actuator arm and paddle in
place so that the paddle swings down freely.
c) Replace the Bin Control Cover.
4) 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.
5) Check that the refrigerant lines do not rub or touch lines or other surfaces, and that the
fan blade turns freely.
6) Check that the Compressor is snug on all mounting pads.
7) See the Nameplate on the Rear Panel, and check that your voltage supplied corresponds
with the voltage specified on the Nameplate.
8) This icemaker needs a storage bin. The recommended storage bin is HOSHIZAKI ICE
STORAGE BIN, Model B-500 series, DB-200, or DM-180.

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2. HOW TO REMOVE PANELS - See Fig. 1
a) Front Panel.......... Remove the screw.
Lift up and pull toward
you.
b) Top Panel............ Lift its front up slightly,
push away, and then lift
off.
c) Side Panel (R) ..... Remove the screw.
Pull slightly toward you,
and lift off.
d) Insulation Panel... Lift up slightly, and pull
toward you.
3. 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.
Fig. 1

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4. SET UP
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.
5. 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
Fig. 2

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6. 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.
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 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-250MWH
KML-250MAH

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7. FINAL CHECK LIST
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?
a) Is the cube guide in its correct position?
b) Does the Bin Switch assembly actuator arm and paddle swing freely?
5) Have all electrical and piping connections been made?
6) Has the power supply voltage been checked or tested against the nameplate rating?
And has a proper ground been installed in the icemaker?
7) 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.
8) Have the compressor hold-down bolts and refrigerant lines been checked against
vibration and possible failure?
9) 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?
10) Has the end user been given the name and telephone number of an authorized service
agent?
11) Has the warranty tag been filled out and forwarded to the factory for warranty
registration?

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8. START UP
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. This will cause damage to the Water Pump seal.
1) Open the Water Supply Line Shut-off Valve.
2) Remove the Front Panel.
3) Move the toggle 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) Remove the Front Panel and the Bin Control Cover and turn the control switch to “OFF”.
7) Check to assure that the Bin Switch shuts the unit down.
a) Turn the control switch to “ICE”.
b) Allow the unit to cycle into the freeze mode. This occurs when the
pump motor starts to supply water upwards, through the supply tube.
After 1-2 minutes in freeze, move the bin switch paddle fully to the right
See Fig. 5.
c) The unit should shut down within 3-5 seconds.
Fig. 5

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Note: The Bin Switch will only shut down the unit at the end of a harvest or within the first
5 minutes of the freeze cycle. To shut the unit down outside of this time period
turn the control switch to “OFF”.
8) Replace the Bin Control Cover.
9) Move the Control Switch to the “Service” position. Then move the Service Switch to
the “Drain” position.
10) Replace the Front Panel.
11) Turn on the power supply for 2 minutes to allow the icemaker to drain.
12) Turn off the power supply and remove the Front Panel.
13) Move the Control Switch, on the Control Box, to the “ICE” position.
14) Replace the Front Panel and turn on the power supply.

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9. 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.

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[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.
[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
1. 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 for safe handling of the cleaning and
sanitizing solution. This will prevent irritation from the solution coming into
contact with the skin.
[a] CLEANING PROCEDURE
1) Dilute approximately 5.5 fl. oz. of recommended cleaner Hoshizaki “Scale Away” or
“LIME-A-WAY,” (Economics Laboratory, Inc.) with 1 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 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 toward you.
9) Pour the cleaning solution into the Water Tank.

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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 and turn on the power supply for 2 minutes.
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) Move the Control Switch to the “SERVICE” position; then move the Service Switch
to 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) After 5 minutes, turn off the power supply.
27) Remove the Front Panel.
28) Move the Service Switch to the “DRAIN” position.
29) Replace the Front Panel and turn on the power supply for 2minutes.
30) Turn off the power supply.
31) Remove the Front Panel.
31) Repeat the above steps 18) through 31) three more times to rinse thoroughly.

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Note: If you do not sanitize the icemaker, go to step 14) in “SANITIZING
PROCEDURE.”
[b] SANITIZING PROCEDURE - Following Cleaning Procedure
1) Dilute IMS-II Sanitizer or a 5.25% Sodium Hypochlorite solution with water (Add
.5 fl. oz. to 1 gal. of water).
Note: IMS-II Sanitizer, Part #SA0004, is available through your Hoshizaki Dealer.
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 position.
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 and turn on the power supply for 2 minutes.
11) Turn off the power supply.
12) Remove the Front Panel.
13) Repeat the above steps 18) through 31) in “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.