Hoshizaki
“A Superior Degree
of Reliability”
www.hoshizaki.com
Models
DCM-751BAH(-OS)
DCM-751BWH(-OS)
Cubelet Icemaker/Dispenser
Hoshizaki America, Inc.
Issued: 3-23-2011
INSTRUCTION MANUAL
2
IMPORTANT
Only qualied service technicians should install, service, and maintain the
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 qualied 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:
•ModelNumber
•SerialNumber
•Completeanddetailedexplanationoftheproblem.
3
CONTENTS
Important Safety Information ................................................................................................. 4
I. Specications ...................................................................................................................... 5
A. Electrical Data ............................................................................................................... 5
1. DCM-751BAH (air-cooled) ....................................................................................... 5
2. DCM-751BAH-OS (air-cooled)................................................................................. 6
3. DCM-751BWH (water-cooled) ................................................................................. 7
4. DCM-751BWH-OS (water-cooled) ........................................................................... 8
B. Dimensions/Connections .............................................................................................. 9
1. DCM-751BAH (air-cooled) ....................................................................................... 9
2. DCM-751BAH-OS (air-cooled)............................................................................... 10
3. DCM-751BWH (water-cooled) ................................................................................11
4. DCM-751BWH-OS (water-cooled) ......................................................................... 12
II. Installation and Operating Instructions ............................................................................ 13
A. Checks Before Installation ........................................................................................... 13
B. How to Remove Panels ............................................................................................... 14
C. Location ...................................................................................................................... 15
D. Setup ........................................................................................................................... 15
E. Electrical Connection .................................................................................................. 16
F. Water Supply and Drain Connections .......................................................................... 17
1. Icemaker ................................................................................................................ 18
2. Water-Cooled Condenser....................................................................................... 19
a) Connection to an Open Drain System ............................................................... 19
b) Connection to a Closed Loop System ............................................................... 20
G. Final Checklist ............................................................................................................ 21
H. Startup ........................................................................................................................ 22
I. Dispense Mode Switch ................................................................................................. 23
III. Cleaning and Maintenance ............................................................................................. 24
A. Cleaning and Sanitizing Instructions ........................................................................... 25
1. Water System ......................................................................................................... 25
2. Dispensing Components ....................................................................................... 27
B. Maintenance ................................................................................................................ 29
C. Preparing the Icemaker for Long Storage ................................................................... 30
IMPORTANT
This manual should be read carefully before the icemaker is installed and
operated. Only qualied 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.
4
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 injury or
damage resulting from improper, incorrect, and unreasonable use.
To reduce the risk of death, electric shock, serious injury, or re, follow
basic precautions including the following:
•Onlyqualiedservicetechniciansshouldinstall,service,andmaintainthe
icemaker.
•Electricalconnectionmustbehard-wiredandmustmeetnational,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.
•Thisunitrequiresanindependentpowersupply.Seethenameplatefor
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.
•Movethecontrolswitchandthepowerswitchtothe"OFF"positionandturn
off the power supply before servicing. Lockout/Tagout to prevent the power
supply from being turned back on inadvertently.
•Donotmakeanyalterationstotheunit.Alterationscouldresultinelectric
shock, injury, re, or damage to the unit.
5
MODEL NUMBER DCM-751BAH
SERIAL NUMBER
AC SUPPLY VOLTAGE 115-120/60/1
COMPRESSOR 115V 77LRA 14.6RLA
GEAR MOTOR 120V 3.0FLA 1/4HP
FAN MOTOR 120V 1.0FLA 50W
AGITATING MOTOR 120V 1.8FLA(TOTAL) 110W
DISPENSING MOTOR 120V 0.9FLA 55W
OTHER 120V 0.6A
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-460PSI LO-290PSI
REFRIGERANT 404A 1 LB. 10 OZ.
I. Specications
A. Electrical Data
1. DCM-751BAH (air-cooled)
The rating label and nameplate provide electrical and refrigerant data. The rating label can
be seen by removing the front panel. The nameplate is located on the rear panel.
We reserve the right to make changes in specications 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
For certication marks, see the nameplate
on the rear panel.
6
MODEL NUMBER DCM-751BAH-OS
SERIAL NUMBER
AC SUPPLY VOLTAGE 115-120/60/1
COMPRESSOR 115V 77LRA 14.6RLA
GEAR MOTOR 120V 3.0FLA 1/4 HP
FAN MOTOR 120V 1.0FLA 50W
AGITATING MOTOR 120V 1.8FLA(TOTAL) 110W
DISPENSING MOTOR 120V 0.9FLA 55W
OTHER 120V 0.6A
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-460PSI LO-290PSI
REFRIGERANT 404A 1 LB. 10 OZ.
2. DCM-751BAH-OS (air-cooled)
The rating label and nameplate provide electrical and refrigerant data. The rating label can
be seen by removing the front panel. The nameplate is located on the rear panel.
We reserve the right to make changes in specications 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
For certication marks, see the nameplate
on the rear panel.
7
HOSHIZAKI ICE MAKER
3. DCM-751BWH (water-cooled)
The rating label and nameplate provide electrical and refrigerant data. The rating label can
be seen by removing the front panel. The nameplate is located on the rear panel.
We reserve the right to make changes in specications and design without prior notice.
MODEL NUMBER DCM-751BWH
SERIAL NUMBER
AC SUPPLY VOLTAGE 115-120/60/1
COMPRESSOR 115V 77LRA 14.6RLA
GEAR MOTOR 120V 3.0FLA 1/4HP
FAN MOTOR ---- ---- ----
AGITATING MOTOR 120V 1.8FLA(TOTAL) 110W
DISPENSING MOTOR 120V 0.9FLA 55W
OTHER 120V 0.6A
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-460PSI LO-290PSI
REFRIGERANT 404A 1 LB. 6 OZ.
MOTOR-COMPRESSOR THERMALLY PROTECTED
NOT INTENDED FOR OUTDOOR USE!
Hoshizaki America, Inc.
Peachtree City, GA
www.hoshizaki.com
For certication marks, see the nameplate
on the rear panel.
8
4. DCM-751BWH-OS (water-cooled)
The rating label and nameplate provide electrical and refrigerant data. The rating label can
be seen by removing the front panel. The nameplate is located on the rear panel.
We reserve the right to make changes in specications and design without prior notice.
HOSHIZAKI ICE MAKER
MODEL NUMBER DCM-751BWH-OS
SERIAL NUMBER
AC SUPPLY VOLTAGE 115-120/60/1
COMPRESSOR 115V 77LRA 14.6RLA
GEAR MOTOR 120V 3.0FLA 1/4HP
FAN MOTOR ---- ---- ----
AGITATING MOTOR 120V 1.8FLA(TOTAL) 110W
DISPENSING MOTOR 120V 0.9FLA 55W
OTHER 120V 0.6A
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-460PSI LO-290PSI
REFRIGERANT 404A 1 LB. 6 OZ.
MOTOR-COMPRESSOR THERMALLY PROTECTED
NOT INTENDED FOR OUTDOOR USE!
Hoshizaki America, Inc.
Peachtree City, GA
www.hoshizaki.com
For certication marks, see the nameplate
on the rear panel.
9
B. Dimensions/Connections
1. DCM-751BAH (air-cooled)
Unit: mm [in.]
Rear View
Side ViewFront View
Top View
Side View
10
2. DCM-751BAH-OS (air-cooled)
Unit: mm [in.]
Rear View
Side ViewFront View
Top View
Side View
11
3. DCM-751BWH (water-cooled)
Unit: mm [in.]
Rear View
Side ViewFront View
Top View
Side View
12
4. DCM-751BWH-OS (water-cooled)
Unit: mm [in.]
Rear View
Side ViewFront View
Top View
Side View
13
II. Installation and Operating Instructions
WARNING
1. This icemaker must be installed in accordance with applicable national, state,
and local codes and 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
•Visuallyinspecttheexterioroftheshippingcontainerandimmediatelyreportany
damage to the carrier. Upon opening the container, any concealed damage should also
be immediately reported to the carrier.
•Removetheshippingcarton,tape,andpackingmaterial.Ifanyareleftintheicemaker,
it will not work properly.
•Removethepanelstopreventdamagewheninstallingtheicemaker.See"II.B.Howto
RemovePanels."
•Removethepackagecontainingtheaccessories.
•Removetheprotectiveplasticlmfromthepanels.Iftheicemakerisexposedtothe
sun or to heat, remove the lm after the icemaker cools.
•Checkthattherefrigerantlinesdonotrubortouchlinesorothersurfaces,andthatthe
fan blade (if applicable) turns freely.
•Checkthatthecompressorissnugonallmountingpads.
•Seethenameplateontherearpanel,andcheckthatyourvoltagesupplied
corresponds with the voltage specied on the nameplate.
•Thisicemakercanbeinstalledonacountertoporonanoptionalstand.Ifusingan
optional stand, Hoshizaki Stand SD-700 or SD-750 is recommended. For further
options, contact your local Hoshizaki distributor.
•Thedriptrayonthefrontoftheicemakerisremovableforinstallationsusingan
in-counter drain. Drip tray removal requires HS-5003 for DCM-751 B_H or HS-5002 for
DCM-751B_H-OS.
DCM-751 on
Hoshizaki Stand SD-700
DCM-751 on
Hoshizaki Stand SD-750
DCM-751B_H with
DripTray Removal Kit
HS-5003
DCM-751B_H-OS with
DripTray Removal Kit
HS-5002
14
B. How to Remove Panels
See Fig. 1 or Fig. 2
•FrontPanel:Removethescrew.Liftupandtowardsyou.Disconnecttheconnectoron
push-button models.
•TopPanel:Liftupatfrontslightly,pushrearwardandliftoff.
•ApronPanel:Removethescrewsandpulltowardsyou.Disconnecttheconnectorson
Opti-Serve models.
•SidePanels:Removethescrewsandpulltowardsyou.
Fig. 1
DCM-751B_H
(Push-Button Models)
DCM-751B_H-OS
(Opti-Serve Models)
Fig. 2
Top Panel
Side Panel
Side Panel
Front Panel
Apron Panel
Connector
Top Panel
Side Panel
Side Panel
Front Panel
Apron Panel
Connectors
15
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
goingtogobelow32°F(0°C).See"III.C.PreparingtheIcemakerforLong
Storage."
IMPORTANT
Opti-Serve Models (-OS): Sunlight, direct and indirect, can have an effect on
the operation of the dispense sensors. If a problem is noticed, the icemaker
should be moved out of direct sunlight and/or farther away from any outside
windows.
For best operating results:
•Theicemakershouldnotbelocatednexttoovens,grills,orotherhighheatproducing
equipment.
•Thelocationshouldprovidearmandlevelfoundationfortheequipment.
•Allow6"(15cm)clearanceatrearandsidesforproperaircirculationandeaseof
maintenanceand/orserviceshouldtheyberequired.Allow24"(61cm)clearanceattop
to allow for removal of the auger.
D. Setup
1) Position the icemaker in the selected permanent location. If applicable, attach optional
6"legsorattachtoanoptionalstand.Ifattachingtoastand,refertotheinstructions
included with the stand. If removing the drip tray, refer to the instructions included with
the HS kit (HS-5003 for DCM-751 B_H or HS-5002 for DCM-751B_H-OS).
2) Level the icemaker in both the left-to-right and front-to-rear directions. If using optional
6"legsoranoptionalstand,adjustthelegstomaketheicemakerlevel.
3) If mounting at to a counter, seal the perimeter where the icemaker contacts the
counter with approved caulk compound in a smooth and easily cleanable manner.
4) Replace the panels in their correct positions.
16
E. Electrical Connection
WARNING
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 extensive 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 instructions on
the"WARNING"tag,providedwiththepigtailleadsinthejunctionbox.See
Fig. 3.
•Usuallyanelectricalpermitandservicesofalicensedelectricianarerequired.
•Themaximumallowablevoltagevariationis±10percentofthenameplaterating.
•Thewhiteleadmustbeconnectedtotheneutralconductorofthepowersource.
CAUTION! Miswiring may result in severe damage to the icemaker. See Fig. 3.
•Theopeningforthepowersupplyconnectionis7/8"DIAtota1/2"tradesizeconduit.
Fig. 3
115-120/60/1
WARNING
ELECTRICAL CONNECTION
THIS UNIT MUST BE GROUNDED
Failure to properly ground or wire
this unit could result in death,
serious injury, or severe damage
to the icemaker. The white lead
must be connected to the neutral
conductor of the power source.
See diagram below.
4A4766-010
JUNCTION BOX
1
15-120V
BROWN
WHITE
L
N
17
F. Water Supply and Drain Connections
See Fig. 4, 5, or 6
WARNING
1. Water supply and drain connections must be installed in accordance with
applicable national, state, and local codes and 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.
•Aplumbingpermitandservicesofalicensedplumbermayberequiredinsomeareas.
•Externallters,strainers,orsoftenersmayberequireddependingonwaterquality.
Contact your local Hoshizaki distributor for recommendations.
•Watersupplypressureshouldbeaminimumof10PSIGandamaximumof113PSIG.If
the pressure exceeds 113 PSIG, the use of a pressure reducing valve is required.
•Thestoragebindrainline,driptraydrainline,andwater-cooledcondenserdrainline(if
applicable) must be run separately.
•Drainlinesmusthave1/4"fallperfoot(2cmper1m)onhorizontalrunstogetagood
ow. A vented tee connection is also required for proper ow.
•Drainlinesshouldnotbepipeddirectlytothesewersystem.Anairgapofaminimumof
2 vertical inches (5 cm) should be between the end of the drain pipes from the storage
bin, drip tray, and water-cooled condenser (if applicable) and the oor drain.
18
1. Icemaker
•Icemakerwatersupplyinletis1/2"femalepipethread(FPT).Aminimumof1/4"nominal
ID copper water tubing or equivalent is required for the icemaker water supply line.
•Anicemakerwatersupplylineshut-offvalveanddrainvalveshouldbeinstalled.
•Storagebinanddriptraydrainoutletsare3/4"FPT.Aminimumof3/4"nominalIDhard
pipe or equivalent is required for the storage bin and drip tray drain lines.
Storage Bin
Drain Outlet
3/4"FPT
Drip Tray
Drain Outlet
3/4"FPT
Fig. 4 DCM-751BAH(-OS)
Icemaker
Stand
Icemaker Water Supply
Line Shut-Off Valve
Icemaker Water
Supply Inlet
1/2"FPT
Icemaker Water Supply
Line Drain Valve
Vent
Tube
Minimum1/4"NominalID
Copper Water Tubing
Minimum3/4"NominalID
Hard Pipe
Separate piping to approved
drain. Leave a 2-inch (5-cm)
vertical air gap between the
end of each pipe and the
drain.
2-inch (5-cm)
air gap
Floor
Drain
19
Condenser Water
Supply Inlet
1/2"FPT
Condenser
Drain Outlet
3/8"FPT
Icemaker Water
Supply Inlet
1/2"FPT
Drip Tray
Drain Outlet
3/4"FPT
2. Water-Cooled Condenser
a) Connection to an Open Drain System
•Condenserwatersupplyinletis1/2"femalepipethread(FPT).Aminimumof1/4"nominal
ID copper water tubing or equivalent is required for the condenser water supply line.
•Acondenserwatersupplylineshut-offvalveanddrainvalveshouldbeinstalled.
•Condenserdrainoutletis3/8"FPT.Aminimumof1/4"nominalIDhardpipeorequivalent
is required for the condenser drain line.
•Insomeareas,abackowpreventermayberequiredinthecondenserwatersupplyline.
•Inordertomaintaintheproperhighsidepressure,thecondenserwatersupplyinlet
temperature should not drop below 45°F (7°C) and the condenser drain outlet temperature
must be in the 104°F to 115°F (40°C to 46°C) range. Once the icemaker installation
is complete, conrm the condenser drain outlet temperature 5 minutes after a freeze
cycle starts. If the condenser drain outlet temperature is not in the proper range, use a
at blade screwdriver to rotate the adjustment screw on the water-regulating valve until
the temperature is in the proper range (rotate counterclockwise to raise temperature or
clockwise to lower temperature).
Fig. 5
DCM-751BWH(-OS)
Connection to an Open Drain System
Separate piping to approved
drain. Leave a 2-inch (5-cm)
vertical air gap between the
end of each pipe and the
drain.
Floor
Drain
Icemaker
Stand
Storage Bin
Drain Outlet
3/4"FPT
Icemaker Water Supply
Line Shut-Off Valve
Icemaker Water Supply
Line Drain Valve
Condenser Water Supply
Line Shut-Off Valve
Condenser Water
Supply Line Drain Valve
Vent
Tube
Minimum1/4"NominalID
Copper Water Tubing
Vent
Tube
Minimum3/4"NominalID
Hard Pipe
Minimum1/4"
Nominal ID Hard Pipe
2-inch (5-cm)
air gap
20
b) Connection to a Closed Loop System
•Condenserwatersupplyinletis1/2"femalepipethread(FPT).Aminimumof1/4"nominal
ID copper water tubing or equivalent is required for the condenser water supply line.
•Condenserreturnoutletis3/8"FPT.Aminimumof1/4"nominalIDcopperwatertubingor
equivalent is required for the condenser return line.
•Shut-offvalvesanddrainvalvesshouldbeinstalledatboththecondenserwatersupply
inlet and condenser return outlet.
•Thewatersupplytothecondensershouldnotdropbelow4GPM.
•Thepressuredifferentialbetweenthecondenserwatersupplyinletandcondenserreturn
outlet must be no less than 10 PSIG.
•Whenusingaglycolblend,thesolutionmixtureshouldbelessthan30%glycol.
•Inordertomaintaintheproperhighsidepressure,thecondenserwatersupplyinlet
temperature should not drop below 45°F (7°C) and the condenser drain outlet temperature
must be in the 104°F to 115°F (40°C to 46°C) range. Once the icemaker installation
is complete, conrm the condenser drain outlet temperature 5 minutes after a freeze
cycle starts. If the condenser drain outlet temperature is not in the proper range, use a
at blade screwdriver to rotate the adjustment screw on the water-regulating valve until
the temperature is in the proper range (rotate counterclockwise to raise temperature or
clockwise to lower temperature).
Condenser Return
Line Shut-Off Valve
Condenser Return
Line Drain Valve
Icemaker Water Supply
Line Shut-Off Valve
Condenser Water Supply
Line Shut-Off Valve
Condenser Water Supply
Line Drain Valve
Condenser Water
Supply Inlet
1/2"FPT
Drip Tray
Drain Outlet
3/4"FPT
Fig. 6
DCM-751BWH(-OS)
Connection to a Closed Loop System
Icemaker
Stand
Icemaker Water Supply
Line Drain Valve
Storage Bin
Drain Outlet
3/4"FPT
Separate piping to approved
drain. Leave a 2-inch (5-cm)
vertical air gap between the
end of each pipe and the
drain.
Floor
Drain
Condenser
Return Outlet
3/8"FPT
Icemaker Water
Supply Inlet
1/2"FPT
Minimum1/4"NominalID
Copper Water Tubing
Vent
Tube
Minimum3/4"NominalID
Hard Pipe
2-inch (5-cm)
air gap
21
G. 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)Isthereatleast6"(15cm)clearanceatrearandsidesand24"(61cm)attopforproper
air circulation and ease of maintenance and service?
4) Have the shipping carton, tape, and packing material been removed from the
icemaker?
5) If the icemaker is mounted at to a counter, has the perimeter where the icemaker
contacts the counter been sealed with approved caulk compound? If the icemaker is
on a stand, has it been secured to the stand as outlined in the stand's instructions?
If the drip tray has been removed, has the icemaker been secured to the counter
as outlined in the HS kit's instructions (HS-5003 for DCM-751B_H or HS-5002 for
DCM-751B_H-OS)?
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?
8) Are the water supply line shut-off valve(s) and drain valve(s) 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) Are all components, fasteners, and thumbscrews securely in place?
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 card been lled out and forwarded to the factory for warranty
registration?
22
H. 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. At startup, conrm that all internal and external connections are free of leaks.
1) Open the water supply line shut-off valve(s).
2)Movethecontrolswitchtothe"OFF"position.SeeFig.7.
3)Removethefrontpanel,thenmovethepowerswitchtothe"ON"position.Replacethe
front panel in its correct position, then turn on the power supply.
Note: This unit will not run if the safety switch is not engaged.
4)Movethecontrolswitchtothe"ICE"positiontostarttheautomaticicemakingprocess.
5) Once the unit starts to produce ice, allow it to run for another 30 minutes.
6)Movethecontrolswitchtothe"OFF"position,pausemomentarily,thenmovetothe
"DRAIN"position.Allowthewatersystemtodrainfor5minutes.
Note:a)Amomentarypauseinthe"OFF"positionisnecessarytode-energizethe
controlboardwhenmovingthecontrolswitchbetween"ICE"and"DRAIN."
Otherwise there is a delay of several minutes before the new selection takes
effect.
b)Ifthecontrolswitchisleftinthe"DRAIN"positionfor10minutesormore,a
2-beep alarm sounds every 5 seconds. Move the control switch out of the
"DRAIN"positiontoclearthealarm.
7)Movethedispensemodeswitchtothe"CONTINUOUS"position,thendispenseallof
the ice from the storage bin.
Note: Ice dispenses continuously for a maximum of 60 seconds per activation.
Fig. 7
Power Switch
Safety Switch
Actuator Paddle
Storage Bin Cover
Control Box Cover
CONTROL
DISPENSE MODE
4A1038-014
ICE
OFF
DRAIN
PORTION
CONTINUOUS
23
Fig. 8
8) Remove the front panel, then remove the storage bin cover.
9)Movethecontrolswitchtothe"ICE"position.
10) Conrm bin control operation: Remove the control box cover, then engage the safety
switchonthefrontframe.SeeFig.7.Afterthe"GM"LEDonthecontrolboardturns
on,bypassthe5-minutecompressorstartupdelaybypressingthe"SERVICE"button.
See Fig.8. WARNING! Risk of electric shock. Care should be taken not to touch
live terminals. After the compressor starts, press and hold the actuator paddle located
inside the storage bin. WARNING! Keep hands, hair, and loose clothing clear of the
agitators inside the storage bin. The icemaker should shut down within 10 seconds.
11)Disengagethesafetyswitch.Movethecontrolswitchtothe"OFF"position,thenmove
thepowerswitchtothe"OFF"position.Turnoffthepowersupply.Replacethecontrol
box cover in its correct position.
12) Clean the storage bin liner, cover, and components using a neutral cleaner. Rinse
thoroughly after cleaning. Replace the storage bin cover in its correct position.
WARNING! CHOKING HAZARD: Ensure all components, fasteners, and
thumbscrews are securely in place. Make sure that none have fallen into the
storage bin.
13)Movethepowerswitchtothe"ON"position,thenreplacethefrontpanelinitscorrect
position.Turnonthepowersupply,thenmovethecontrolswitchtothe"ICE"positionto
start the automatic icemaking process.
I. Dispense Mode Switch
Thedispensemodeswitchhas"CONTINUOUS"and"PORTION"positions.
Whenthedispensemodeswitchisinthe"CONTINUOUS"position,icedispenses
continuously for a maximum of 60 seconds per activation.
Whenthedispensemodeswitchisinthe"PORTION"position,icedispensesforthe
amount of time determined by the ice dispense time setting. The ice dispense time
control is located on the control board. The dial indicates dispense time in seconds and
is adjustable between 0.6 and 20 seconds. See Fig. 8. When shipped, the ice dispense
time control is set to the minimum dispense time of 0.6 sec. At this setting, approximately
0.72 oz. of ice is dispensed. The DCM-751BAH(-OS) and DCM-751BWH(-OS) dispense
approximately 1.2 oz. of ice per second.
"SERVICE"Button
"GM"LED
"COMP"LED
Ice Dispense Time Control
24
III. Cleaning and Maintenance
This icemaker must be cleaned and maintained in accordance with the instruction
manual and labels provided with the icemaker. Consult with your local distributor
about cleaning and maintenance service. To obtain the name and phone number of
your local distributor, visit www.hoshizaki.com or call Hoshizaki Technical Support at
1-800-233-1940 in the USA.
WARNING
1. Only qualied service technicians should service this icemaker.
2. 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.
3. The storage bin is for ice use only. Do not store anything else in the storage
bin.
Fig. 9
Spout B
Spout A
Extruding Head
Agitating Motors
Dispensing Motor
Agitators
Dispensing
Auger
Power Switch
Reservoir
Bin Control Assembly
Storage Bin Cover
Spout Cover
Evaporator Assembly
Safety Switch
Optical Sensors (-OS models)
Float Switch Assembly
Ice Guide
Drain Pipe Holder
Drain Pipe
CONTROL
DISPENSE MODE
4A1038-014
ICE
OFF
DRAIN
PORTION
CONTINUOUS
25
A. Cleaning and Sanitizing Instructions
Hoshizaki recommends cleaning and sanitizing this unit at least twice 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. Do not use ice made from the cleaning and sanitizing solutions. After cleaning
and sanitizing, be careful not to leave any solution on the parts or in the
storage bin.
1. Water System
a) Cleaning Solution
Dilute9.6.oz.(0.29l)ofHoshizaki"ScaleAway"with1.6gal.(6.0l)ofwarmwater.
b) Cleaning Procedure
1) Close the icemaker water supply line shut-off valve.
2)Movethecontrolswitchtothe"OFF"position,pausemomentarily,thenmovetothe
"DRAIN"position.SeeFig.9.Allowthewatersystemtodrainfor5minutes.
Note:a)Amomentarypauseinthe"OFF"positionisnecessarytode-energizethe
controlboardwhenmovingthecontrolswitchbetween"ICE"and"DRAIN."
Otherwise there is a delay of several minutes before the new selection takes
effect.
b)Ifthecontrolswitchisleftinthe"DRAIN"positionfor10minutesormore,a
2-beep alarm sounds every 5 seconds. Move the control switch out of the
"DRAIN"positiontoclearthealarm.
3)Movethedispensemodeswitchtothe"CONTINUOUS"position,thendispenseallof
the ice from the storage bin.
Note: Ice dispenses continuously for a maximum of 60 seconds per activation.
4)Movethecontrolswitchtothe"OFF"position,thenturnoffthepowersupply.Remove
thefrontandtoppanels,thenmovethepowerswitchtothe"OFF"position.
5) Remove the storage bin cover. Remove spout B, then remove spout A.
6) Pour the cleaning solution over the extruding head until the evaporator assembly and
the reservoir are full and the solution starts to overow into the drain pan.
Note: If there is excess scale on the extruding head, ll the evaporator assembly and
reservoir as described above, then use a clamp on the reservoir hose between
the reservoir and evaporator assembly to block ow. Pour additional cleaning
solution over the extruding head until the evaporator assembly is completely full.
7) Replace spout A, spout B, and the storage bin cover in their correct positions.
26
8) Allow the icemaker to sit for 10 minutes before operation. If you placed a clamp on the
reservoir hose in step 6, remove it before operation.
9) In bad or severe water conditions, clean the oat switch assembly as described below.
Otherwise, continue to step 10.
a. Remove the oat switch assembly from the reservoir cover.
b. Wipe down the oat switch assembly with the cleaning solution.
c. Rinse the oat switch assembly thoroughly with clean water.
d. Replace the oat switch assembly in its correct position.
10)Movethepowerswitchtothe"ON"positionandreplacethepanelsintheircorrect
positions.Turnonthepowersupply,thenmovethecontrolswitchtothe"ICE"position.
Make ice using the solution until the icemaker stops making ice.
Note: This unit will not run if the safety switch is not engaged.
11)Movethecontrolswitchtothe"OFF"position,pausemomentarily,thenmovetothe
"DRAIN"position.Allowthewatersystemtodrainfor5minutes.
12)Movethecontrolswitchtothe"OFF"position,pausemomentarily,thenmovetothe
"ICE"position.Opentheicemakerwatersupplylineshut-offvalvetosupplywatertothe
reservoir.
13)Afterthegearmotorstarts,movethecontrolswitchtothe"OFF"position,pause
momentarily,thenmovetothe"DRAIN"position.Allowthewatersystemtodrainfor
5minutes.
Note:Ifyoudonotsanitizetheunit,movethecontrolswitchtothe"OFF"position,
pausemomentarily,thenmovetothe"ICE"positionafterthewatersystem
drains. Allow the icemaker to run for 30 minutes, then move the control switch to
the"OFF"position.Turnoffthepowersupply,thenremovethefrontpaneland
storagebincover.Movethepowerswitchtothe"OFF"position.Gotostep12in
"III.A.2.c)CleaningandSanitizingProcedure"under"DispensingComponents."
14)Movethecontrolswitchtothe"OFF"position,thenturnoffthepowersupply.
15) Close the icemaker water supply line shut-off valve.
27
c) Sanitizing Solution
Dilute0.82.oz.(25ml)ofa5.25%sodiumhypochloritesolution(chlorinebleach)with
1.6 gal. (6.0 l) of warm water.
d) Sanitizing Procedure - Following Cleaning Procedure
1)Makesurethecontrolswitchisinthe"OFF"position,thepowersupplyisoff,andthe
icemaker water supply line shut-off valve is closed.
2)Removethefrontandtoppanels,thenmovethepowerswitchtothe"OFF"position.
3) Remove the storage bin cover. Remove spout B, then remove spout A.
4) Pour the sanitizing solution over the extruding head until the evaporator assembly and
the reservoir are full and the solution starts to overow into the drain pan.
5) Replace spout A, spout B, and the storage bin cover in their correct positions.
6) Allow the icemaker to sit for 10 minutes before operation.
7)Movethepowerswitchtothe"ON"positionandreplacethepanelsintheircorrect
positions.Turnonthepowersupply,thenmovethecontrolswitchtothe"ICE"position.
Make ice using the solution until the icemaker stops making ice.
8)Movethecontrolswitchtothe"OFF"position,pausemomentarily,thenmovetothe
"DRAIN"position.Allowthewatersystemtodrainfor5minutes.
9)Movethecontrolswitchtothe"OFF"position,pausemomentarily,thenmovetothe
"ICE"position.Opentheicemakerwatersupplylineshut-offvalvetosupplywatertothe
reservoir.
10)Afterthegearmotorstarts,movethecontrolswitchtothe"OFF"position,pause
momentarily,thenmovetothe"DRAIN"position.Allowthewatersystemtodrainfor
5minutes.
11)Movethecontrolswitchtothe"OFF"position,pausemomentarily,thenmovetothe
"ICE"position.Allowtheicemakertorunfor30minutes,thencleanandsanitizethe
dispensing components as outlined below.
2. Dispensing Components
Perform after cleaning and sanitizing the water system as outlined above.
a) Cleaning Solution
Dilute9.6.oz.(0.29l)ofHoshizaki"ScaleAway"with1.6gal.(6.0l)ofwarmwater.
b) Sanitizing Solution
Dilute0.82.oz.(25ml)ofa5.25%sodiumhypochloritesolution(chlorinebleach)with
1.6 gal. (6.0 l) of warm water.
c) Cleaning and Sanitizing Procedure
1)Movethecontrolswitchtothe"OFF"position,thenturnoffthepowersupply.
2)Removethefrontandtoppanels,thenmovethepowerswitchtothe"OFF"position.
3) Remove the storage bin cover.
28
4) Remove the motor bracket thumbscrews, rst from the vertical plane and then from the
horizontal plane. While holding on to the corresponding agitator or auger, move the
agitating motor or the dispensing motor towards you. Remove the agitators and the
dispensing auger from the storage bin. See Fig. 9.
5) Remove the bin control assembly. See Fig. 10.
6) Remove the snap pin, shaft, and actuator.
7) Remove spout B, spout A, and their gaskets.
8) Remove the spout cover, ice dispensing spout, and water dispensing nozzle. See
Fig. 11. Also remove the ice guide, drain pipe holder, and drain pipe from the storage
bin. See Fig. 9.
9) Immerse the agitators, dispensing auger, and parts removed in steps 5 through 8 in the
cleaning solution and then in the sanitizing solution for 15 minutes each. Rinse the parts
thoroughly with clean water. On Opti-Serve models (-OS), wipe the optical sensors with
cleaning solution and then with a clean, damp cloth.
10) Wipe the shutter located above the ice dispensing spout thoroughly with a clean cloth.
11) Reassemble the bin control assembly and replace all parts in the reverse order of which
they were removed.
12) Pour warm water into the storage bin and melt any remaining ice. Clean the storage bin
liner and the storage bin cover using a neutral cleaner. Rinse thoroughly after cleaning.
Replace the storage bin cover in its correct position.
13)Movethepowerswitchtothe"ON"position,thenreplacethepanelsintheircorrect
positions.Turnonthepowersupply,thenmovethecontrolswitchtothe"ICE"position
to start the automatic icemaking process.
Fig. 11
Spout Cover
Ice Dispensing Spout
Water Dispensing Nozzle
Fig. 10
Snap Pin
Shaft
Actuator
Bin Control Bracket
29
B. Maintenance
The maintenance schedule below is a guideline. More frequent maintenance may be
required depending on water quality, the icemaker's environment, and local sanitation
regulations.
WARNING
1. Only qualied service technicians should service this icemaker.
2.Movethecontrolswitchandthepowerswitchtothe"OFF"positionandturn
off the power supply before servicing. Lockout/Tagout to prevent the power
supply from being turned back on inadvertently.
Maintenance Schedule
Frequency Area Task
Every 2
Weeks
Air Filters Inspect. Wash with warm water and neutral cleaner if dirty.
Monthly External Water
Filters
Check for proper pressure and change if necessary.
Icemaker Exterior Wipe down with a clean, soft cloth. Use a damp cloth containing a neutral
cleaner to wipe off oil or dirt build up. Clean any chlorine staining (rust
colored spots) using a non-abrasive cleaner like Zud or Bon Ami.
Every 6
Months
Icemaker and
Storage Bin
Clean and sanitize per the cleaning and sanitizing instructions provided in
this manual.
Evaporator
Condensate Drain
Pan and Gear
Motor Drain Pan
Wipe down with a clean cloth and warm water. Slowly pour one cup of
sanitizing solution (prepare as outlined in the sanitizing instructions in
this manual) into the evaporator condensate drain pan. Be careful not to
overow the pan. This solution will ow down to the gear motor drain pan
and out the drain line to sanitize these areas. Repeat with a cup of clean
water to rinse.
Icemaker, Storage
Bin, and Drip Tray
Drains
Check to make sure they are clear.
Yearly Inlet Water Valve
and Drain Valve
Close the icemaker water supply line shut-off valve and drain the water
system. Clean the inlet water valve screen and clean and inspect the drain
valve.
Water Hoses Inspect the water hoses and clean/replace if necessary.
Condenser Inspect. Clean if necessary by using a brush or vacuum cleaner.
Icemaker Inspect for oil spots, loose components, fasteners, and wires.
Upper Bearing
(extruding head)
Checkforwearusing.02"roundstockorpingauge.Replacebothupper
bearing and lower bearing if wear exceeds factory recommendations. See
the Service Manual for details.
After
3 Years,
then Yearly
Upper Bearing
(extruding head);
Lower Bearing
and O-Ring
(lower housing);
Mechanical
Seal; Evaporator
Cylinder; Auger
Inspect. Replace both upper bearing and lower bearing if wear exceeds
factory recommendations. Replace the mechanical seal if the seal's contact
surfaces are worn, cracked, or scratched.
30
C. Preparing the Icemaker for Long Storage
CAUTION
When storing the icemaker for an extended time or in sub-freezing
temperatures, follow the instructions below to prevent damage.
When the icemaker is not used for two or three days under normal conditions,
itissufficienttoonlymovethecontrolswitchtothe"OFF"position.When
storing the icemaker for extended time or in sub-freezing temperatures, follow
the instructions below.
1. Remove the ice from the storage bin, drain the water system, and remove the
water from the icemaker water supply line:
1) Close the icemaker water supply line shut-off valve and open the icemaker water
supply line drain valve.
2)Movethecontrolswitchtothe"OFF"position,pausemomentarily,thenmovetothe
"DRAIN"position.Allowthewatersystemtodrainfor5minutes.
Note:a)Amomentarypauseinthe"OFF"positionisnecessarytode-energizethe
controlboardwhenmovingthecontrolswitchbetween"ICE"and"DRAIN."
Otherwise there is a delay of several minutes before the new selection takes
effect.
b)Ifthecontrolswitchisleftinthe"DRAIN"positionfor10minutesormore,a
2-beep alarm sounds every 5 seconds. Move the control switch out of the
"DRAIN"positiontoclearthealarm.
3)Movethedispensemodeswitchtothe"CONTINUOUS"position,thendispenseallof
the ice from the storage bin.
Note: Ice dispenses continuously for a maximum of 60 seconds per activation.
4) Attach a compressed air or carbon dioxide supply to the icemaker water supply line
drain valve.
5) While engaging the water dispense switch, blow out the water dispense valve using the
compressed air or carbon dioxide supply. After blowing out the water dispense valve,
leave the compressed air or carbon dioxide supply owing. Move the control switch to
the"OFF"position,pausemomentarily,thenmovetothe"ICE"positiontoopentheinlet
water valve and briey blow out the inlet water valve. After blowing out the inlet water
valve,movethecontrolswitchtothe"OFF"position.
6) Close the icemaker water supply line drain valve.
7) Turn off the power supply, then remove the front panel and move the power switch to the
"OFF"position.
8) Remove the storage bin cover. Clean the storage bin liner and the storage bin cover
using a neutral cleaner. Rinse thoroughly after cleaning. Replace the storage bin cover
and the front panel in their correct positions.
Note: If your unit has a water-cooled condenser, leave the front panel off and go to the
next section.
31
2. On water-cooled model only, remove the water from the water-cooled condenser:
1)Makesurethecontrolswitchandthepowerswitchareinthe"OFF"positionandthat
the power supply is off. Remove the top, apron, and left side panels.
2) Close the condenser water supply line shut-off valve. If connected to a closed loop
system, also close the condenser return line shut-off valve.
3) Open the condenser water supply line drain valve. If connected to a closed loop system,
also open the condenser return line drain valve.
4) Attach a compressed air or carbon dioxide supply to the condenser water supply line
drain valve.
5) Open the water regulating valve by using a screwdriver to pry up on the spring retainer
underneath the spring. While holding the valve open, blow out the condenser using the
compressed air or carbon dioxide supply until water stops coming out.
6) Close the drain valve(s).
7) Replace the panels in their correct positions.
32
HOSHIZAKI AMERICA, INC.
618 Hwy. 74 S., Peachtree City, GA 30269 USA TEL (770) 487-2331 FAX (770) 487-3360 www.hoshizaki.com 91A2GG10A
