Hoshizaki KM-901MAH50 Crescent Cuber Icemaker, Air-cooled, User Manual

Hoshizaki

“A Superior Degree

of Reliability”

www.hoshizaki.com

Models

KM-901MAH50

KM-901MRH50

Modular Crescent Cuber

Hoshizaki America, Inc.

Issued: 6-21-2010

INSTRUCTION MANUAL

™

IMPORTANT

Only qualied service technicians should 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. Failure to install, operate, and

maintain the equipment in accordance with this manual may adversely affect

safety, performance, component life, and warranty coverage.

Hoshizaki provides this manual primarily to assist qualied 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, write, or send an e-mail message 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: 1-800-233-1940 Technical Support

(770) 487-2331

Fax: 1-800-843-1056

(770) 487-3360

E-mail: techsuppor[email protected]

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.

CONTENTS

Important Safety Information ................................................................................................. 4

I. Specications ...................................................................................................................... 5

A. Nameplate Rating ......................................................................................................... 5

1. KM-901MAH50 (air-cooled) ...................................................................................... 5

2. KM-901MRH50 (remote air-cooled) ........................................................................ 6

B. Dimensions/Connections .............................................................................................. 7

1. KM-901MAH50 ......................................................................................................... 7

2. KM-901MRH50 ........................................................................................................ 8

II. Installation and Operating Instructions .............................................................................. 9

A. Checks Before Installation ............................................................................................. 9

B. How to Remove Panels ................................................................................................. 9

C. Location ...................................................................................................................... 10

D. Setup ........................................................................................................................... 10

E. Electrical Connection ...................................................................................................11

F. Installation of Remote Condenser Unit ........................................................................ 12

1. Checks Before Installation ...................................................................................... 12

2. Location ................................................................................................................. 12

3. Setup ..................................................................................................................... 13

4. Line Set ................................................................................................................. 13

a) Factory Line Set Installation ............................................................................... 13

b) Field Fabricated Line Set Installation.................................................................. 14

5. Refrigerant Charge (Line Set Exceeding 66 Feet) ................................................. 16

6. Electrical Connection ............................................................................................. 16

7. Stacking Remote Condenser Units ........................................................................ 17

G. Water Supply and Drain Connections ......................................................................... 18

H. Final Checklist ............................................................................................................. 20

I. Startup .......................................................................................................................... 21

III. Cleaning and Maintenance ............................................................................................. 22

A. Cleaning and Sanitizing Instructions .......................................................................... 22

1. Cleaning Procedure ................................................................................................ 22

2. Sanitizing Procedure - Following Cleaning Procedure ........................................... 23

B. Maintenance ................................................................................................................ 24

C. Preparing the Icemaker for Long Storage ................................................................... 24

IMPORTANT

This manual should be read carefully before the icemaker is installed and

operated. Only qualied service technicians should install, service, and

maintain the icemaker. Read the warnings contained in this booklet carefully

as they give important information regarding safety. Please retain this booklet

for any further reference that may be necessary.

Important Safety Information

Throughout this manual, notices appear to bring your attention to situations which could

result in death, serious injury, or damage to the unit.

WARNING Indicates a hazardous situation which could result in death or

serious injury.

CAUTION Indicates a situation which could result in damage to the unit.

IMPORTANT Indicates important information about the use and care of the

unit.

WARNING

This icemaker should be destined only to the use for which it has been

expressly conceived. Any other use should be considered improper and

therefore dangerous. The manufacturer cannot be held responsible for

eventual damage caused by improper, incorrect, and unreasonable use.

To reduce the risk of death, electric shock, serious injury, or re, follow

basic precautions including the following:

•Electricalconnectionmustbehard-wiredandmustmeetnational,state,and

local electrical code requirements. Failure to meet these code requirements

could result in death, electric shock, serious injury, re, or severe damage to

equipment.

•Thisunitrequiresanindependentpowersupply.Seethenameplatefor

proper voltage and breaker/fuse size. Failure to use a proper breaker or fuse

can result in a tripped breaker, blown fuse, or damage to existing wiring. This

could lead to heat generation or re.

•THIS UNIT MUST BE GROUNDED. Failure to properly ground this unit could

result in death or serious injury.

•Thisunitshouldbedisassembledorrepairedonlybyqualiedservice

personnel to reduce the risk of electric shock, injury, or re.

•Donotmakeanyalterationstotheunit.Alterationscouldresultinelectric

shock, injury, re, or damage to the unit.

I. Specications

A. Nameplate Rating

1. KM-901MAH50 (air-cooled)

See the nameplate for electrical and refrigeration specications. This nameplate is located

on both the rear panel and inside the icemaker.

We reserve the right to make changes in speciﬁcations and design without prior notice.

HOSHIZAKI ICE MAKER

MODEL NUMBER KM-901MAH50

SERIAL NUMBER

AC SUPPLY VOLTAGE 230V

FREQUENCY 50HZ

ELECTRICAL CONSUMPTION 2157W

COMPRESSOR CONSUMPTION 1921W

AMPERAGE 9.0A

STARTING AMPERAGE 34A

REFRIGERANT 404A 1375G

WEIGHT 116KG

MAXIMUM OPERATING PRESSURE 2.88MPA

LEAK TIGHTNESS TESTED

MOTOR-COMPRESSOR THERMALLY PROTECTED,

NOT INTENDED FOR OUTDOOR USE!

Hoshizaki America, Inc.

Peachtree City, GA

www.hoshizaki.com

See the nameplate for electrical and refrigeration specications. This nameplate is located

on both the rear panel and inside the icemaker.

We reserve the right to make changes in speciﬁcations and design without prior notice.

HOSHIZAKI ICE MAKER

MODEL NUMBER KM-901MRH50

SERIAL NUMBER

AC SUPPLY VOLTAGE 230V

FREQUENCY 50HZ

ELECTRICAL CONSUMPTION 2222W

COMPRESSOR CONSUMPTION 1961W

AMPERAGE 9.2A

STARTING AMPERAGE 37A

REFRIGERANT 404A 2420G

WEIGHT 113KG

MAXIMUM OPERATING PRESSURE 2.88MPA

LEAK TIGHTNESS TESTED

MOTOR-COMPRESSOR THERMALLY PROTECTED,

NOT INTENDED FOR OUTDOOR USE!

Hoshizaki America, Inc.

Peachtree City, GA

www.hoshizaki.com

2. KM-901MRH50 (remote air-cooled)

Unit: mm (in.)

B. Dimensions/Connections

1. KM-901MAH50

2. KM-901MRH50

Unit: mm (in.)

II. Installation and Operating Instructions

WARNING

1. This icemaker must be installed in accordance with applicable national, state,

and local regulations.

2. CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews

are securely in place after installation. Make sure that none have fallen into

the storage bin.

A. Checks Before Installation

•Visuallyinspecttheexterioroftheshippingcontainerandimmediatelyreportany

damage to the carrier. Upon opening the container, any concealed damage should also

be immediately reported to the carrier.

•Removetheshippingcarton,tape,andpackingmaterial.Ifanyareleftintheicemaker,

it will not work properly.

•Removethepanelstopreventdamagewheninstallingtheicemaker.See"II.B.Howto

RemovePanels."

•Removethepackagecontainingtheaccessories.

•Removetheprotectiveplasticlmfromthepanels.Iftheicemakerisexposedtothe

sun or to heat, remove the lm after the icemaker cools.

•Checkthattherefrigerantlinesdonotrubortouchlinesorothersurfaces,andthatthe

fan blade (if applicable) turns freely.

•Checkthatthecompressorissnugonallmountingpads.

•Seethenameplateontherearpanel,andcheckthatyourvoltagesupplied

corresponds with the voltage specied on the nameplate.

•Thisicemakercanbeinstalledonastoragebin30"wideorwider.HoshizakiIce

Storage Bin, Model B-500 series is recommended. For further options, contact your

local Hoshizaki distributor.

•Onremoteair-cooledmodel,aremotecondenserunitisneeded.HoshizakiRemote

Condenser Unit, Model URC-9F is recommended.

B. How to Remove Panels

See Fig. 1

•FrontPanel:Removethescrew.Liftupand

towards you.

•TopPanel:Liftupatfrontslightly,pushrearward,

and lift off.

•SidePanel(R):Removethescrew.Slideforward

slightly, and lift off.

•InsulationPanel:Liftupslightly,andpulltowards

you.

•BaseCover:Liftupslightly,andpulltowardsyou.

Fig. 1

Top Panel

Front

Panel

Insulation

Panel

Side Panel (R)

Base Cover

Screw

C. Location

CAUTION

1. This icemaker is not intended for outdoor use. Normal operating ambient

temperature should be within 45°F to 100°F (7°C to 38°C); Normal operating

water temperature should be within 45°F to 90°F (7°C to 32°C). Operation

of the icemaker, for extended periods, outside of these normal temperature

ranges may affect icemaker performance.

2. This icemaker will not work at sub-freezing temperatures. To prevent damage

to the water supply line, drain the icemaker if the air temperature is going to

gobelow32°F(0°C).See"III.C.PreparingtheIcemakerforLongStorage."

For best operating results:

•Theicemakershouldnotbelocatednexttoovens,grills,orotherhighheatproducing

equipment.

•Thelocationshouldprovidearmandlevelfoundationfortheequipment.

•Allow6"(15cm)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 4 adjustable legs provided (bin accessory) to

the bottom of the storage bin.

2) Position the storage bin in the selected permanent location.

3) Place the icemaker on top of the storage bin.

4) Secure the icemaker to the storage bin

using the 2 mounting brackets and the

bolts provided. See Fig. 2.

5) Level the icemaker and storage bin in both

the left-to-right and front-to-rear directions.

Adjust the storage bin legs to make the

icemaker level.

6) Replace the panels in their correct

positions.

Fig. 2

Icemaker

Bolts

Mounting

Brackets

Bin

E. Electrical Connection

WARNING

For All Models

1. Electrical connection must be hard-wired and must meet national, state, and

local electrical code requirements. Failure to meet these code requirements

could result in death, electric shock, serious injury, re, or severe damage to

equipment.

2. This unit requires an independent power supply. See the nameplate for

proper voltage and breaker/fuse size. Failure to use a proper breaker or fuse

can result in a tripped breaker, blown fuses, or damage to existing wiring.

This could lead to heat generation or re.

3. THIS UNIT MUST BE GROUNDED. Failure to properly ground this unit could

result in death or serious injury.

4. Electrical connection must be made in accordance with the label provided

next to the junction box. See Fig. 3.

Additional Warnings for Remote Air-Cooled Model

5. THE REMOTE CONDENSER UNIT MUST BE GROUNDED. The power

supply and ground wire to the remote condenser unit are supplied from the

icemaker.See"II.F.5.ElectricalConnection."

6. To reduce the risk of electric shock, make all remote condenser unit

connections before connecting the icemaker power supply.

7. On remote air-cooled models, the icemaker should have power for a

minimum of 4 hours prior to startup to prevent compressor damage.

•Usuallyanelectricalpermitandservicesofalicensedelectricianarerequired.

•Themaximumallowablevoltagevariationis±10percentofthenameplaterating.

•Theopeningforthepowersupplyconnectionis7/8"DIAtota1/2"tradesizeconduit.

KM-901MAH50

KM-901MRH50

Fig. 3

230V

4A1169-011

F. Installation of Remote Condenser Unit

WARNING

1. Installation of remote condenser unit must be performed by properly trained

and certied service personnel.

2. Failure to install the equipment within these guidelines may adversely affect

safety, performance, component life, and warranty coverage.

1. Checks Before Installation

1) Remove the shipping carton, tape, and packing material.

2) Check that the refrigerant lines do not rub or touch lines or other surfaces, and that the

fan blade moves freely.

2. Location

CAUTION

The remote condenser unit is intended for outdoor use. Normal operating

ambient temperature should be within -20°F to +122°F (-29°C to +50°C).

Operation of the remote condenser unit, for extended periods, outside of this

normal temperature range may affect icemaker performance.

The remote condenser unit must be positioned in a permanent site under the following

guidelines:

•Armandatsite.

•Adryandwellventilatedareawith24"(61cm)clearanceinbothfrontandrearfor

proper air circulation and ease of maintenance and/or service should they be required.

See Fig. 4.

•Themaximumlinelengthforthestandardrefrigerantchargeis66feet.Withadditional

refrigerant,themaximumlinelengthis100feet.Fordetails,see"II.F.5.Refrigerant

Charge(LineSetExceeding66Feet)."

•Themaximumverticaldistancebetweentheremotecondenserunitandtheicemaker

is 33 feet above or 10 feet below the icemaker. These distances are measured tting to

tting. See Fig. 5.

Fig. 4

Min.24"(61cm)Clearance

Air Air

Icemaker

Remote

Condenser

Unit

Service Loop

Max. 33 Feet

Fig. 5

3. Setup

1) Secure the legs to the remote

condenser unit with the 8 bolts and

nuts provided. See Fig. 6.

2) The legs have 8 mounting holes.

Secure the legs to the permanent

site with 8 bolts (not included).

4. Line Set

CAUTION

The icemaker, line set, and remote condenser unit must contain the same

type of refrigerant. Mixing of refrigerants will result in improper operation and

possible damage to the refrigeration system.

•Prechargedfactorylinesets,availableasoptionalequipmentfromHoshizakiAmerica,are

recommended.Fordetails,see"II.F.4.a)FactoryLineSetInstallation."Fieldfabricated

linesetsareallowed.Fordetails,see"II.F.4.b)FieldFabricatedLineSetInstallation."

•Themaximumlinelengthforthestandardrefrigerantchargeis66feet.Withadditional

refrigerant,themaximumlinelengthis100feet.Fordetails,see"II.F.5.Refrigerant

Charge(LineSetExceeding66Feet)."

a) Factory Line Set Installation

1)Routethefactorylineset(1/2"ODdischargelineand3/8"ODliquidline)fromthe

remote condenser unit to the icemaker. Leave a service loop behind the icemaker to

allow the icemaker to be pulled out for service. See Fig. 7. Factory fabricated line sets

are precharged and do not need to be evacuated. If the line set is too long or too short,

see"II.F.4.a)(1)FactoryLineSetModication."

CAUTION

1. Ensure that there are no traps and no kinks in the line set.

2. Do not coil extra line set.

2) Connect the refrigerant lines to the appropriate male ttings on the remote condenser

unit rst and then at the icemaker. Make a proper connection as follows:

a. Remove the protective covers from the male tting and female coupling.

b. Apply Polyol Ester (POE) refrigerant oil or Parker Super O Lube to the entire male

tting, including O-ring, diaphragm, and threads before making the connection. See

Fig. 8.

CAUTION

Do not use thread sealant on the ttings. Use POE refrigerant oil or Parker

Super O Lube only.

Fig. 6

Bolts with Split

Lock Washer

and Flat Washer

Nuts

Mounting Holes

c. Make sure the male tting and female coupling are properly aligned, then start the

connection by hand to ensure that it is not cross threaded.

d. Tighten the connection with a wrench until it is tight. At this point, the nut has

covered most of the threads on the male tting.

e. Mark a reference line on the female coupling and the remote condenser unit or

icemaker panel. Using a backup wrench on the back of the female coupling, tighten

the six-sided nut of the female coupling an additional 1/6 turn. See Fig. 9.

3)Ifyoulengthenedthelinesetasoutlinedin"II.F.4.a)(1)FactoryLineSetModication"

anditexceeds66feet,see"II.F.5RefrigerantCharge(LineSetExceeding66Feet)"for

proper charging of the unit.

(1) Factory Line Set Modication

1) Recover the line set charge through the Schrader access ports on the Parker quick

connect couplings and store it in an approved container. Do not discharge the refrigerant

into the atmosphere. Remove the extra line set length or add extra tubing. When adding

extra tubing, insulate the additional copper tubes separately. Braze the connections.

2) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace

of refrigerant to the lines through the Schrader access ports on the Parker quick

connect couplings (if using an electronic leak detector), and then raise the pressure

using nitrogen gas (140 PSIG). WARNING! DO NOT use R-404A as a mixture with

pressurized air for leak testing.

3) Evacuate through the Schrader access ports on the Parker quick connect couplings and

chargewithR-404Arefrigerantvaportoapressureof15to30PSIG.Gotostep2in"II.

F.4.a)FactoryLineSetInstallation."

b) Field Fabricated Line Set Installation

1)Routea1/2"ODcoppertubedischargelineanda3/8"ODcoppertubeliquidline

between the remote condenser unit and the icemaker. Leave a service loop behind the

icemaker to allow the icemaker to be pulled out for service. See Fig. 7.

CAUTION

1. Ensure that there are no traps and no kinks in the line set.

2. Do not coil extra line set. Fabricate the line set to the proper length.

2) Insulate the two copper tubes separately.

3) Install Parker quick connect couplings on each end. OS-QUICK , a universal quick

connect coupling kit available as optional equipment from Hoshizaki America, is

recommended. CAUTION! Before brazing, remove the Schrader valve core from the

access port. When brazing, protect the coupling by using a wet cloth to prevent

the coupling from overheating.

4) Allow the coupling to cool, then replace the Schrader valve core.

5) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace

of refrigerant to the lines through the Schrader access ports on the Parker quick

connect couplings (if using an electronic leak detector), and then raise the pressure

using nitrogen gas (140 PSIG). WARNING! DO NOT use R-404A as a mixture with

pressurized air for leak testing.

6) Evacuate through the Schrader access ports on the Parker quick connect couplings

and charge with R-404A refrigerant vapor to a pressure of 15 to 30 PSIG.

7) Connect the refrigerant lines to the appropriate male ttings on the remote condenser

unit rst and then at the icemaker. Make a proper connection as follows:

a. Remove the protective covers from the male tting and female coupling.

b. Apply Polyol Ester (POE) refrigerant oil or Parker Super O Lube to the entire male

tting, including O-ring, diaphragm, and threads, before making the connection.

See Fig. 8.

CAUTION

Do not use thread sealant on the ttings. Use POE refrigerant oil or Parker

Super O Lube only.

c. Make sure the male tting and female coupling are properly aligned, then start the

connection by hand to ensure that it is not cross threaded.

d. Tighten the connection with a wrench until it is tight. At this point, the nut has

covered most of the threads on the male tting.

e. Mark a reference line on the female coupling and the remote condenser unit or

icemaker panel. Using a backup wrench on the back of the female coupling,

tighten the six-sided nut of the female coupling an additional 1/6 turn. See Fig. 9.

8)Ifthelinesetexceeds66feet,see"II.F.5RefrigerantCharge(LineSetExceeding66

Feet)"forproperchargingoftheunit.

Fig. 7

Female Coupling

1/2"ODDischargeLine

(Insulated)

Remote Condenser Unit

3/8"ODLiquidLine

(Insulated)

Icemaker

Male Fitting

Service Loop

Apply POE Oil or

Parker Super O Lube

to Entire Male Fitting

THREAD

SEALANT

Threads

Diaphragm

O-Ring

Fig. 8

Brush

Male Fitting

DO NOT USE

THREAD SEALANT

POLYOL

ESTER

(POE) OIL

PARKER

SUPER

O LUBE

Fig. 9

Backup

Wrench

Reference

Line

1/6

Tu r n

Wrench

After Tight, Tighten an

Additional 1/6 Turn

Backup

Wrench

5. Refrigerant Charge (Line Set Exceeding 66 Feet)

CAUTION

The icemaker, line set, and remote condenser unit must contain the same

type of refrigerant. Mixing of refrigerants will result in improper operation and

possible damage to the refrigeration system.

The maximum line length for the standard refrigerant charge is 66 feet. Should an

installation require a longer line length, additional refrigerant must be added. Add 0.4 oz. of

R-404A for each foot over 66 feet to a maximum of 100 feet. Hoshizaki Technical Support

is available at 1-800-233-1940 for recommendations.

After weighing in the additional charge, mark the unit's nameplate to show the new correct

total refrigerant charge.

6. Electrical Connection

WARNING

1. Electrical connection must meet national, state, and local electrical code

requirements. Failure to meet these code requirements could result in death,

electric shock, serious injury, re, or severe damage to equipment.

2. THE REMOTE CONDENSER UNIT MUST BE GROUNDED. Install a proper

ground wire from the icemaker to the remote condenser unit. Use wire of

an appropriate gage and outdoor rating. Failure to properly ground the unit

could result in death or serious injury.

3. The remote condenser unit leads must be connected to the fan motor

junction box leads on the icemaker. Use wire of an appropriate gage and

outdoor rating.

4. Do not connect the leads to an external power source. Do not connect the

icemaker's fan motor junction box leads together. Do not allow the leads to

contact the junction box walls.

5. To reduce the risk of electric shock, make all remote condenser unit

connections before connecting the icemaker power supply.

6. On remote air-cooled models, the icemaker should have power for a

minimum of 4 hours prior to startup to prevent compressor damage.

•Usuallyanelectricalpermitandservicesofalicensedelectricianarerequired.

•Theopeningforthepowersupplyconnectionis7/8"DIAtota1/2"tradesizeconduit.

1) Remove the louver panel. See Fig. 10.

2) Remove the junction box cover on the remote condenser unit. Remove the fan motor

junction box cover on the icemaker.

3) Install a ground wire from the icemaker to the remote condenser unit. Use wire of an

appropriate gage and outdoor rating.

4) Connect the fan motor leads in the junction box of the remote condenser unit to the fan

motor leads in the fan motor junction box of the icemaker. Use wire of an appropriate

gage and outdoor rating.

5) Replace the junction box covers and the louver panel in their correct positions.

7. Stacking Remote Condenser Units

1) Install the lower remote condenser unit as described earlier in this section.

2) Place the upper remote condenser unit on top of the lower. See Fig. 11.

3) Secure the upper remote condenser unit to the lower remote condenser unit with the

4 screws provided.

4) Install refrigerant lines and make electrical connection as described earlier in this

section.

Fig. 10

Screws

Louver Panel

Junction Box

Cover

Remote Condenser Unit

Icemaker

Screw

Fan Motor Junction

Box Cover

Fig. 11

Upper Remote

Condenser Unit

Screws

Lower Remote

Condenser Unit

Screws

G. Water Supply and Drain Connections

See Fig. 12

WARNING

1. Water supply and drain connections must be installed in accordance with

applicable national, state, and local regulations.

2. Normal operating water temperature should be within 45°F to 90°F (7°C

to 32°C). Operation of the icemaker, for extended periods, outside of this

normal temperature range may affect icemaker performance.

3. To prevent damage to equipment, 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.

•Aplumbingpermitandservicesofalicensedplumbermayberequiredinsomeareas.

•Externallters,strainers,orsoftenersmayberequireddependingonwaterquality.

Contact your local Hoshizaki distributor for recommendations.

•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.

•Theicemakerandcondensationdrainline(s)andstoragebindrainlinemustberun

separately.

•Drainlinesmusthave1/4"fallperfoot(2cmper1m)onhorizontalrunstogetagood

ow.Aventedteeconnectionisalsorequiredforproperow.

•Drainlinesshouldnotbepipeddirectlytothesewersystem.Anairgapofaminimumof

2 vertical inches (5 cm) should be between the end of the drain pipes from the icemaker,

condensationdrain,andstoragebinandtheoordrain.

1. Icemaker

•Icemakerwatersupplyinletis1/2"femalepipethread(FPT).Aminimumof3/8"OD

copper tubing is recommended for the icemaker water supply line.

•Anicemakerwatersupplylineshut-offvalveanddrainvalveshouldbeinstalled.

•Icemakerdrainoutletis3/4"FPT.Aminimumof3/4"ODhardpipeisrecommendedfor

theicemakerdrainline.Condensationdrainoutletis3/8"ODtube.Thecondensation

drain line can be connected to the icemaker drain line or can be run separately.

Fig. 12

KM-901MAH50 and KM-901MRH50

Separate piping to approved drain.

Leave a two-inch (5 cm) vertical air

gap between the end of each pipe

and the drain.

Icemaker Water Supply Line

Shut-OffValve

Icemaker Water Supply Line

DrainValve

Icemaker

Water Supply

Inlet

1/2"FPT

Bin Drain Outlet

3/4"FPT

Two-inch

(5 cm) air

gap

Floor

Drain

Icemaker

Drain Outlet

3/4"FPT

Bin

Condensation

Drain Outlet

3/8"ODTube

H. Final Checklist

WARNING

CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are

securely in place after installation. Make sure that none have fallen into the

storage bin.

1) Is the icemaker level?

2) Is the icemaker in a site where the ambient temperature is within 45°F to 100°F (7°C to

38°C) and the water temperature within 45°F to 90°F (7°C to 32°C) all year around?

3)Isthereatleast6"(15cm)clearanceatsides,rear,andtopoftheicemakerforproper

air circulation and ease of maintenance and service?

4) Have the shipping carton, tape, and packing material been removed from the

icemaker? Is the cube guide in the correct position?

5) Are all components, fasteners, and thumbscrews securely in place?

6) Have all electrical and water connections been made? Do electrical and water

connections meet all national, state, and local code and regulation requirements?

7) Has the power supply voltage been checked or tested against the nameplate rating?

Has a proper ground been installed to the icemaker? On remote air-cooled model, has

a proper ground also been installed to the remote condenser unit?

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) Are the compressor hold-down bolts snug? Have the refrigerant lines been checked

to make sure they do not rub or touch other lines or surfaces? Has the fan blade (if

applicable) been checked to make sure it turns freely?

10) On remote air-cooled model, is the refrigerant line set tightened and free of kinks?

11) On remote air-cooled model, has the icemaker power supply been on for a minimum of

4 hours?

12) 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?

13) Has the end user been given the name and telephone number of an authorized service

agent?

14) Has the warranty card been lled out and forwarded to the factory for warranty

registration?

I. Startup

WARNING

1. All parts are factory-adjusted. Improper adjustments may adversely affect

safety, performance, component life, and warranty coverage.

2. If the icemaker is turned off, wait for at least 3 minutes before restarting the

icemaker to prevent damage to the compressor.

3. To prevent damage to the water pump seal, do not operate the icemaker with

thecontrolswitchinthe"WASH"positionwhenthewatertankisempty.

4. At startup, conrm that all internal and external connections are free of leaks.

5. On remote air-cooled model, the icemaker should have power for a minimum

of 4 hours prior to startup to prevent compressor damage.

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 icemaker to operate for a total of 10 minutes.

6) Turn off the power supply, then remove the front panel.

7) Remove the base cover, then disconnect one end of the pump tubing to drain the water

tank. See Fig. 13.

8) After the water tank has drained, reconnect the pump tubing.

9) Clean the storage bin liner using a neutral cleaner. Rinse thoroughly after cleaning.

10) Replace the base cover and the front panel in their correct positions.

11) Turn on the power supply to start the automatic icemaking process.

12) To conrm bin control operation, press and hold the bin control's actuator paddle during

the rst 5 minutes of the freeze cycle. The icemaker should shut down in approximately

15 seconds.

Fig. 13

Disconnect This

End of Pump

Tubing to Drain

Water Tank

Base Cover

III. Cleaning and Maintenance

WARNING

CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are

securely in place after any cleaning or maintenance is done to the unit. Make

sure that none have fallen into the storage bin.

A. Cleaning and Sanitizing Instructions

Hoshizaki recommends cleaning and sanitizing this unit at least once a year. More

frequent cleaning and sanitizing, however, may be required in some existing water

conditions.

WARNING

1. To prevent injury to individuals and damage to the icemaker, do not use

ammonia type cleaners.

2. Carefully follow any instructions provided with the bottles of cleaning and

sanitizing solution.

3. Always wear liquid-proof gloves and goggles to prevent the cleaning and

sanitizing solutions from coming into contact with skin or eyes.

4. To prevent damage to the water pump seal, do not operate the icemaker with

thecontrolswitchinthe"WASH"positionwhenthewatertankisempty.

1. Cleaning Procedure

1)Dilute16.oz.(473ml)ofHoshizaki"ScaleAway"with3gal.(11l)ofwarm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 back on

after 3 minutes. The harvest cycle starts and the cubes will be removed from the

evaporator.

3) Turn off the power supply.

4) Remove the front panel, then remove the insulation panel by lifting up the panel slightly

and pulling it towards you.

5) Remove the base cover, then disconnect one end of the pump tubing to drain the water

tank. See Fig. 13. After the water tank has drained, reconnect the pump tubing.

6)Inbadorseverewaterconditions,cleantheoatswitchassemblyasdescribedbelow.

Otherwise, continue to step 7.

a.Disconnecttheventtubeandtheushtubefromthetopoftheoatswitch,then

removetheoatswitchassembly.Removetherubberbootfromthebottomofthe

assembly.

b.Removetheretainerrodfromthebottomoftheoatswitchhousing,thenremove

theoat.Becarefulnottobendtheretainerrodexcessivelywhenremovingit.

c.Wipedowntheoatswitchassembly'shousing,shaft,oat,andretainerrodwith

cleaning solution. Clean the inside of the rubber boot and hose with cleaning

solution. Rinse the parts thoroughly with clean water.

d.Reassembletheoatswitchassemblyandreplaceitandtherubberbootintheir

correctpositions.Reconnecttheventtubeandtheushtube.

7) Pour the cleaning solution into the water tank.

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 to start the washing process.

11) Turn off the power supply after 30 minutes.

12) Remove the front panel.

13) Disconnect one end of the pump tubing to drain the water tank. After the water tank has

drained, reconnect the pump tubing.

14)Movethecontrolswitchtothe"ICE"position.

15) Replace the front panel in its correct position.

16) Turn on the power supply to ll the water tank with water.

17) Turn off the power supply after 3 minutes.

18) Remove the front panel.

19)Movethecontrolswitchtothe"WASH"position.

20) Replace the front panel in its correct position.

21) Turn on the power supply to rinse off the cleaning solution.

22) Turn off the power supply after 5 minutes.

23) Remove the front panel.

24) Disconnect one end of the pump tubing to drain the water tank. After the water tank has

drained, reconnect the pump tubing.

25) Repeat steps 14 through 24 three more times to rinse thoroughly.

Note:Ifyoudonotsanitizetheicemaker,gotostep10in"2.SanitizingProcedure."

2. Sanitizing Procedure - Following Cleaning Procedure

1) Dilute a 5.25% sodium hypochlorite solution (chlorine bleach) with warm water. (Add

1.5.oz.(44ml)ofsanitizerto3gal.(11l)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thecontrolswitchisinthe"WASH"position.

5) Turn on the power supply to start the sanitizing process.

6) Turn off the power supply after 15 minutes.

7) Remove the front panel.

8) Disconnect one end of the pump tubing to drain the water tank. After the water tank has

drained, reconnect the pump tubing.

9)Repeatsteps14through24in"1.CleaningProcedure"twotimestorinsethoroughly.

10)Movethecontrolswitchtothe"ICE"position.

11) Replace the front panel and the base cover in their correct positions.

12) Clean the storage bin liner using a neutral cleaner. Rinse thoroughly after cleaning.

13) Turn on the power supply to start the automatic icemaking process.

B. Maintenance

This icemaker must be maintained individually, referring to the instruction manual and

labels provided with the icemaker.

WARNING

1. Only qualied service technicians should attempt to service or maintain this

icemaker.

2. Disconnect power before performing service or maintenance.

1. Stainless Steel Exterior

To prevent corrosion, wipe the exterior occasionally with a clean, soft cloth. Use a damp

cloth containing a neutral cleaner to wipe off oil or dirt buildup.

2. Storage Bin and Scoop

•Washyourhandsbeforeremovingice.Usetheplasticscoopprovided(binaccessory).

•Thestoragebinisforiceuseonly.Donotstoreanythingelseinthestoragebin.

•Cleanthescoopandthestoragebinlinerusinganeutralcleaner.Rinsethoroughly

after cleaning.

3. Air Filters (air-cooled model)

Plastic mesh air lters remove dirt and dust from the air, and keep the condenser from

getting clogged. As the lters get clogged, the icemaker's performance will be reduced.

Check the lters at least twice a month. When clogged, use warm water and a neutral

cleaner to wash the lters.

4. Condenser (air-cooled and remote air-cooled models)

Check the condenser once a year, and clean the coil if required by using a brush or

vacuum cleaner. More frequent cleaning may be required depending on location.

C. Preparing the Icemaker for Long Storage

CAUTION

1. When storing the icemaker for an extended time or in sub-freezing

temperatures, follow the instructions below to prevent damage.

2. To prevent damage to the water pump seal, do not operate the icemaker with

thecontrolswitchinthe"WASH"positionwhenthewatertankisempty.

When the icemaker is not used for two or three days under normal conditions, it is sufficient

tomovethecontrolswitchtothe"OFF"position.Whenstoringtheicemakerforan

extended time or in sub-freezing temperatures, follow the instructions below.

1. Remove the water from the icemaker water supply line:

1) Turn off the power supply, then remove the front panel.

2)Movethecontrolswitchonthecontrolboxtothe"OFF"position.

3) Close the icemaker water supply line shut-off valve, then open the icemaker water

supply line drain valve.

4) Allow the line to drain by gravity.

5) Attach a compressed air or carbon dioxide supply to the icemaker water supply line

drain valve.

6)Movethecontrolswitchtothe"ICE"position.

7) Replace the front panel in its correct position, then turn on the power supply.

8) Blow the icemaker water supply line out using the compressed air or carbon dioxide

supply.

9) Close the icemaker water supply line drain valve.

2. Drain the water tank:

1) Turn off the power supply, then remove the front panel.

2)Movethecontrolswitchtothe"OFF"position.

3) Remove the base cover, then disconnect one end of the pump tubing to drain the water

tank. See Fig. 13. After the water tank has drained, reconnect the pump tubing.

4) Replace the base cover and the front panel in their correct positions.

5) Remove all ice from the storage bin. Clean the storage bin liner using a neutral cleaner.

Rinse thoroughly after cleaning.

618 Hwy. 74 S., Peachtree City, GA 30269 USA TEL (770) 487-2331 FAX (770) 487-3360 www.hoshizaki.com 91A1JP10A

HOSHIZAKI AMERICA, INC.

Hoshizaki KM-901MAH50 Crescent Cuber Icemaker, Air-cooled, 50Hz Electrical

Product's Documents

Instruction Manual

Specifications

Hoshizaki KM-901MAH50 Questions and Answers