Hoshizaki KM-900MAH50 User manual

™
INSTRUCTION MANUAL
ISSUED: NOV. 6, 2001
KM-900MAH50
MODULAR CRESCENT CUBER
Reliability is a
beautiful thing
TM
REVISED: NOV. 6, 2003

2
HOSHIZAKI AMERICA, INC.
618Highway74South
PeachtreeCity,GA 30269
Attn: HOSHIZAKITechnicalSupportDepartment
Phone: [phone]TechnicalService
[phone]
Fax: [phone]
NOTE: Toexpediteassistance,allcorrespondence/communicationMUSTincludethefollowing
information:
• ModelNumber
• SerialNumber
• Completeanddetailedexplanationoftheproblem
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.
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.
IMPORTANTIMPORTANT
IMPORTANTIMPORTANT
IMPORTANT

3
• Pleasereviewthismanual. Itshouldbereadcarefullybeforetheicemaker isinstalledand
operated.Onlyqualifiedservicetechniciansshouldinstall,serviceandmaintainthe
icemaker. Thismanualshouldbemadeavailabletothetechnicianpriortoinstallation,
maintenanceorservice.
• Keep this manual with the icemaker for future reference.
CONTENTSCONTENTS
CONTENTSCONTENTS
CONTENTS PAGE
I. SPECIFICATIONS ..................................................................................................4
1. NAMEPLATE RATING .........................................................................................4
[a] KM-900MAH50 (Air-cooled) ............................................................................4
2. DIMENSIONS/CONNECTIONS............................................................................5
[a] KM-900MAH50................................................................................................5
II. INSTALLATION AND OPERATING INSTRUCTIONS............................................6
1. CHECKS BEFORE INSTALLATION .....................................................................6
2. HOW TO REMOVE PANELS ...............................................................................7
3. LOCATION ...........................................................................................................7
4. SET UP.................................................................................................................8
5. ELECTRICAL CONNECTION...............................................................................8
6. WATER SUPPLY AND DRAIN CONNECTIONS ..................................................9
7. FINAL CHECK LIST............................................................................................11
8. START UP ..........................................................................................................12
9. PREPARING THE ICEMAKER FOR LONG STORAGE.....................................14
III. CLEANING AND MAINTENANCE INSTRUCTIONS ...........................................15
1. CLEANING INSTRUCTIONS ..............................................................................15
[a] CLEANING PROCEDURE .............................................................................15
[b] SANITIZING PROCEDURE ...........................................................................17
2.MAINTENANCE ..................................................................................................18

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I. SPECIFICATIONSI. SPECIFICATIONS
I. SPECIFICATIONSI. SPECIFICATIONS
I. SPECIFICATIONS
1. NAMEPLATE RATING1. NAMEPLATE RATING
1. NAMEPLATE RATING1. NAMEPLATE RATING
1. NAMEPLATE RATING
[a] KM-900MAH50 (Air-cooled)[a] KM-900MAH50 (Air-cooled)
[a] KM-900MAH50 (Air-cooled)[a] KM-900MAH50 (Air-cooled)
[a] KM-900MAH50 (Air-cooled)
SeetheNameplateforelectricalandrefrigerationspeci-
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.
HOSHIZAKI ICE MAKER
MODEL NUMBER
SERIAL NUMBER
AC SUPPLY VOLTAGE
ELECTRIC CONSUMPTION
AMPERAGE
STARTINGAMPERAGE
REFRIGERANT R404A
WEIGHT
MAX OPERATING PRESSURE
NOT INTENDED FOR OUTDOOR USE
HOSHIZAKI AMERICA, INC.
Peachtree City, GA USA
KM-900MAH50
230V 50 Hz
2040W
10A
58A
1550 G
98 Kg
2.88 MPA

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2.DIMENSIONS/CONNECTIONS2.DIMENSIONS/CONNECTIONS
2.DIMENSIONS/CONNECTIONS2.DIMENSIONS/CONNECTIONS
2.DIMENSIONS/CONNECTIONS
[a] KM-900MAH50[a] KM-900MAH50
[a] KM-900MAH50[a] KM-900MAH50
[a] KM-900MAH50 Unit: mm. (inches)

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II.INSTALLATIONANDOPERATINGINSTRUCTIONSII.INSTALLATIONANDOPERATINGINSTRUCTIONS
II.INSTALLATIONANDOPERATINGINSTRUCTIONSII.INSTALLATIONANDOPERATINGINSTRUCTIONS
II.INSTALLATIONANDOPERATINGINSTRUCTIONS
1. CHECKS BEFORE INSTALLATION1. CHECKS BEFORE INSTALLATION
1. CHECKS BEFORE INSTALLATION1. CHECKS BEFORE INSTALLATION
1. CHECKS BEFORE INSTALLATION
IMPORTANTIMPORTANT
IMPORTANTIMPORTANT
IMPORTANT
1.Remove shipping carton,tape(s) and packing. Ifpacking material isleft in
the icemaker, it will not work properly.
2.Ensure all components, fastenersandthumbscrewsaresecurelyinplace.
1) Remove the panels to prevent damage when installing the icemaker. See “2. HOW TO
REMOVEPANELS.”
2) Remove the package containing the accessories.
3)Removetheprotectiveplasticfilmfromthepanels. Iftheicemakerisexposedtothe 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)SeetheNameplateontheRearPanel,andcheckthatyourvoltagesuppliedcorresponds
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.

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Fig. 1Fig. 1
Fig. 1Fig. 1
Fig. 1
2. HOW TO REMOVE PANELS - See Fig. 12. HOW TO REMOVE PANELS - See Fig. 1
2. HOW TO REMOVE PANELS - See Fig. 12. HOW TO REMOVE PANELS - See Fig. 1
2. HOW TO REMOVE PANELS - See Fig. 1
a) Front Panel ......... Remove the screw.
Lift up and pull toward you.
b) Top Panel............ Lift up slightly its front, 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.
e) Base Cover ......... Lift up slightly, and pull toward you.
3. LOCATION3. LOCATION
3. LOCATION3. LOCATION
3. LOCATION
WARNINGWARNING
WARNINGWARNING
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.

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4. SET UP4. SET UP
4. SET UP4. SET UP
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 mounting brackets 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.
5. ELECTRICAL CONNECTION5. ELECTRICAL CONNECTION
5. ELECTRICAL CONNECTION5. ELECTRICAL CONNECTION
5. ELECTRICAL CONNECTION
WARNINGWARNING
WARNINGWARNING
WARNING
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.
•Thisicemakermust have aseparatepowersupply or receptacleof propercapacity. Seethe
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.
Fig. 2Fig. 2
Fig. 2Fig. 2
Fig. 2

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6. WATER SUPPLY AND DRAIN CONNECTIONS - See Fig. 36. WATER SUPPLY AND DRAIN CONNECTIONS - See Fig. 3
6. WATER SUPPLY AND DRAIN CONNECTIONS - See Fig. 36. WATER SUPPLY AND DRAIN CONNECTIONS - See Fig. 3
6. WATER SUPPLY AND DRAIN CONNECTIONS - See Fig. 3
WARNINGWARNING
WARNINGWARNING
WARNING
Topreventdamagetothepumpassembly,donotoperatetheicemakerwhenthe
watersupplyisOFF,orifthepressureisbelow10PSIG. Donotruntheicemaker
until the proper water pressure is reached.
• Water supply inlet is 1/2" female pipe thread (FPT).
•Awatersupplyline shut-off valve and drainvalve shouldbe installed. Aminimum of3/8" OD
coppertubingisrecommendedforthewatersupplylines.
•Watersupplypressureshouldbeaminimumof 10 PSIG and a maximumof 113 PSIG. If the
pressureexceeds113PSIG,the useofapressurereducingvalveis required.
•Drainoutletforicemakerdumpis3/4"FPT. Thedrainforcondensationisa3/8"IDpipe. The
icemakerdrainandthecondenserdrainpipingconnectionsmustbemadeseparatelyfromthe
bin drain.
•Thedrainsmusthave1/4"fall perfootonhorizontalrunstogetagood flow.
•Thedrainsshouldnotbepipeddirectlytothesewersystem.Anairgapofaminimumof2vertical
inchesshouldbebetweentheendofthedrainpipefromtheicemakerortheicebinandthefloor
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.

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KM-900MAH50KM-900MAH50
KM-900MAH50KM-900MAH50
KM-900MAH50
Fig. 3Fig. 3
Fig. 3Fig. 3
Fig. 3

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7. FINAL CHECK LIST7. FINAL CHECK LIST
7. FINAL CHECK LIST7. FINAL CHECK LIST
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 all year
around?
3) Is there at least 6" clearance around the icemaker for maintenance or service?
4)Haveallshippingcarton,tapesandpackingbeenremovedfromtheicemaker? Isthecube
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)Arethe Water SupplyLine Shut-offValveandDrain Valve installed? Hasthewatersupply
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
below10PSIG. Whentheproperwaterpressureisreached,theicemakerautomati-
cally starts running again.
9)Havethecompressorhold-downboltsandrefrigerantlinesbeencheckedagainstvibration
and possible failure?
10) 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?
11) Has the end user been given the name and telephone number of an authorized service
agent?
12)Has thewarranty tag beenfilled outand forwarded tothe factoryfor warranty registration?

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8. START UP8. START UP
8. START UP8. START UP
8. START UP
CAUTIONCAUTION
CAUTIONCAUTION
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 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 Base Cover and turn the control switch to “OFF”.
7) Turn off the power supply. Remove one end of the Pump Tubing, and drain the Water
Tank. See Fig. 4.
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.
Fig. 4Fig. 4
Fig. 4Fig. 4
Fig. 4

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9. PREPARING THE ICEMAKER FOR LONG STORAGE9. PREPARING THE ICEMAKER FOR LONG STORAGE
9. PREPARING THE ICEMAKER FOR LONG STORAGE9. PREPARING THE ICEMAKER FOR LONG STORAGE
9. PREPARING THE ICEMAKER FOR LONG STORAGE
WARNINGWARNING
WARNINGWARNING
WARNING
Whenshutting off the icemakerforan extended time,drainout all waterfrom
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 a foot or hand pump.
Shut off the icemaker until the proper ambient temperature is resumed.
•Whentheicemakerisnotusedfortwoorthreedays,itissufficienttoonlymovetheControl
Switch to the "OFF" position, unless the icemaker will be at sub-freezing temperatures.
[1] Remove the water from the potable water supply line:
1) Remove the Front Panel.
2) Move the Control Switch, on the Control Box, to the “OFF” position.
3) Wait 3 minutes.
4)ClosethePotableWaterSupplyLineShut-offValveandopenthePotableWaterSupply
Line Drain Valve. See Fig. 3.
5) Allow the line to drain by gravity.
6)AttachcompressedairorcarbondioxidesupplytothePotableWaterLineDrainValve.
7) Move the Control Switch to the “ICE” position.
8) Blow the potable water line out using compressed air or carbon dioxide.
[2] 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.
4) Remove one end of the Pump Tubing, and drain the Water Tank.
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 INSTRUCTIONSIII. CLEANING AND MAINTENANCE INSTRUCTIONS
III. CLEANING AND MAINTENANCE INSTRUCTIONSIII. CLEANING AND MAINTENANCE INSTRUCTIONS
III. CLEANING AND MAINTENANCE INSTRUCTIONS
IMPORTANTIMPORTANT
IMPORTANTIMPORTANT
IMPORTANT
Ensure all components, fasteners and thumbscrews are securely in place
after any maintenance or cleaning is done to the equipment.
1. CLEANING INSTRUCTIONS1. CLEANING INSTRUCTIONS
1. CLEANING INSTRUCTIONS1. CLEANING INSTRUCTIONS
1. CLEANING INSTRUCTIONS
WARNINGWARNING
WARNINGWARNING
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
sanitizingsolution. Thiswillpreventirritationfromthesolutioncominginto
contact with skin.
[a] CLEANING PROCEDURE[a] CLEANING PROCEDURE
[a] CLEANING PROCEDURE[a] CLEANING PROCEDURE
[a] CLEANING PROCEDURE
1) Dilute approximately 16 fl. oz. (473 ml.) of recommended cleaner Hoshizaki “Scale
Away” or “LIME-A-WAY,” (Economics Laboratory, Inc.) with 3 gal. (11.4 l.) of water.
2) Remove all ice from the Evaporator and the Storage Bin.
Note:ToremovecubesontheEvaporator,turnoffthepowersupplyandturnitonafter
3 minutes. The defrost cycle starts and the cubes will be removed from the
Evaporator.
3) Turn off the power supply.
4) Remove the Top Panel, the Front Panel and the Base Cover, and then remove the
Insulation Panel by lifting up the panel slightly and pulling it toward you.
5)RemoveoneendofthePumpTubing. DraintheWaterTank. ReplacethePumpTubing
in its correct position. See Fig. 4.
6) Pour the cleaning solution into the Water Tank.
7) Move the Control Switch, on the Control Box, to the “WASH” position.

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8) Replace the Insulation Panel, the Front Panel and the Top Panel in their correct positions.
9) Turn on the power supply, and start the washing process.
10) Turn off the power supply after 30 minutes.
11) Remove the Top Panel and the Front Panel.
12)RemoveoneendofthePumpTubing. DraintheWaterTank. ReplacethePumpTubingin
its correct position.
13) Move the Control Switch to the “ICE” position.
14) Replace the Front Panel and the Top Panel in their correct positions.
15) Turn on the power supply to fill the Water Tank with water.
16) Turn off the power supply after 3 minutes.
17) Remove the Front Panel, and move the Control Switch to the “WASH” position.
18) Replace the Front Panel in its correct position.
19) Turn on the power supply to rinse off the cleaning solution.
20) Turn off the power supply after 5 minutes.
21) Remove the Front Panel.
22) Remove one end of the Pump Tubing. Drain the Water Tank. Replace the Pump Tubing
in its correct position.
23) Repeat the above steps 13) through 22) three more times to rinse thoroughly.
Note: If you do not sanitize the icemaker, go to the step 10) in “[b] SANITIZING
PROCEDURE.”

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[b] SANITIZING PROCEDURE - Following Cleaning Procedure[b] SANITIZING PROCEDURE - Following Cleaning Procedure
[b] SANITIZING PROCEDURE - Following Cleaning Procedure[b] SANITIZING PROCEDURE - Following Cleaning Procedure
[b] SANITIZING PROCEDURE - Following Cleaning Procedure
1) Dilute 5.25% Sodium Hypochlorite solution (chlorine bleach) with water [Add 1.5 fl. oz.
(44 ml.) of sanitizer to 3 gal. of water].
2) Remove the Insulation Panel.
3) Pour the sanitizing solution into the Water Tank.
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.
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)Repeattheabovesteps13)through22)in“[a]CLEANINGPROCEDURE”twotimestorinse
thoroughly.
10) Move the Control Switch to the “ICE” position.
11) Replace the Front Panel, the Base Cover and the Top Panel in their correct positions.
12) Clean the Storage Bin with water.
13) Turn on the power supply, and start the automatic icemaking process.

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2. MAINTENANCE2. MAINTENANCE
2. MAINTENANCE2. MAINTENANCE
2. MAINTENANCE
IMPORTANTIMPORTANT
IMPORTANTIMPORTANT
IMPORTANT
Thisicemakermustbemaintainedindividually,referringtotheinstructionmanual
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
•Washyour hands beforeremovingice. Use the PlasticScoopprovided (Accessory).
•TheStorage Bin isforice use only. Donotstore anything elsein the Bin.
•KeeptheScoopclean. Cleanitbyusinganeutralcleanerandrinsethoroughly.
•Cleanthebinlinerbyusinganeutralcleaner. Rinsethoroughlyaftercleaning.
3) Air Filter
Aplastic mesh airfilterremovesdirtordust from theair,andkeepstheCondenserfrom
gettingclogged. AstheFiltergetsclogged,theicemaker’sperformancewillbereduced.
Check the Filter at least twice a month. When clogged, use warm water and a neutral
cleaner to wash the Filter.
4) Condenser
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.

HOSHIZAKI
HOSHIZAKIAMERICA,INC.HOSHIZAKIAMERICA,INC.
HOSHIZAKIAMERICA,INC.HOSHIZAKIAMERICA,INC.
HOSHIZAKIAMERICA,INC.
618HIGHWAY74SOUTH618HIGHWAY74SOUTH
618HIGHWAY74SOUTH618HIGHWAY74SOUTH
618HIGHWAY74SOUTH
PEACHTREECITY,GA 30269PEACHTREECITY,GA 30269
PEACHTREECITY,GA 30269PEACHTREECITY,GA 30269
PEACHTREECITY,GA 30269
U.S.A.U.S.A.
U.S.A.U.S.A.
U.S.A.
PHONE:[phone]PHONE:[phone]
PHONE:[phone]PHONE:[phone]
PHONE:[phone]
91A1JJ10C