Models
DCM-300BAH(-OS)
DCM-500B_H(-OS)
DCM-751BWH(-OS)
DCM-752BAH(-OS)
Cubelet Icemaker/Dispenser
Instruction Manual
Issued: 3-25-2020
hoshizakiamerica.com
2
WARNING
Only qualied service technicians should install and service the appliance. To
obtain the name and phone number of your local Hoshizaki Certied Service
Representative, visit www.hoshizaki.com. No installation or service should be
undertaken until the technician has thoroughly read this Instruction Manual.
Likewise, the owner/manager should not proceed to operate the appliance until the
installer has instructed them on its proper operation. Failure to install, operate, and
maintain the appliance in accordance with this manual will adversely affect safety,
performance, component life, and warranty coverage and may result in costly water
damage. Proper installation is the responsibility of the installer. Product failure or
property damage due to improper installation is not covered under warranty.
Hoshizaki provides this manual primarily to assist qualied service technicians in the
installation, maintenance, and service of the appliance.
Should the reader have any questions or concerns which have not been satisfactorily
addressed, please call, send an e-mail message, or write to the Hoshizaki Technical
Support Department for assistance.
Phone: 1-800-233-1940; (770) 487-2331
Fax: 1-800-843-1056; (770) 487-3360
E-mail: techsuppor[email protected]
618 Highway 74 South
Peachtree City, GA 30269
Attn: Hoshizaki Technical Support Department
NOTE: To expedite assistance, all correspondence/communication MUST include the
following information:
• Model Number
• Serial Number
• Complete and detailed explanation of the problem.
3
CONTENTS
Important Safety Information ................................................................................................. 4
I. Specications ...................................................................................................................... 6
A. Electrical and Refrigerant Data ..................................................................................... 6
1. DCM-300BAH(-OS) .................................................................................................. 6
2. DCM-500B_H(-OS) ................................................................................................. 6
3. DCM-751BWH(-OS) ................................................................................................ 7
4. DCM-752BAH(-OS) ................................................................................................. 7
B. Dimensions/Connections .............................................................................................. 8
1. Air-Cooled Models (DCM-300BAH(-OS), DCM-500BAH(-OS)) ................................ 8
2. Air-Cooled Models (DCM-752BAH(-OS)) ................................................................. 9
3. Water-Cooled Models (DCM-500BWH(-OS)) ......................................................... 10
4. Water-Cooled Models (DCM-751BWH(-OS)) ..........................................................11
II. Installation and Operating Instructions ............................................................................ 12
A. Location ...................................................................................................................... 12
B. Checks Before Installation ........................................................................................... 13
C. How to Remove Panels ............................................................................................... 14
D. Setup ........................................................................................................................... 15
E. Electrical Connection .................................................................................................. 15
F. Water Supply and Drain Connections .......................................................................... 16
1. Icemaker ................................................................................................................ 17
2. Water-Cooled Condenser....................................................................................... 18
G. Final Checklist ............................................................................................................ 20
H. Startup ........................................................................................................................ 21
I. Dispense Mode Switch ................................................................................................. 23
J. Alarm Safeties .............................................................................................................. 23
III. Maintenance ................................................................................................................... 24
A. Maintenance Schedule ................................................................................................ 25
B. Cleaning and Sanitizing Instructions ........................................................................... 26
IV. Preparing the Appliance for Periods of Non-Use ............................................................ 30
V. Disposal ........................................................................................................................... 32
IMPORTANT
This manual should be read carefully before the appliance is installed and operated.
Read the warnings and guidelines contained in this manual carefully as they
provide essential information for the continued safe use and maintenance of the
appliance. Retain this manual 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, damage to the appliance, or damage to property.
WARNING Indicates a hazardous situation which could result in death or
serious injury.
NOTICE Indicates a situation which could result in damage to the
appliance or property.
IMPORTANT Indicates important information about the installation, use, and
care of the appliance.
WARNING
The appliance 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. Failure to install, operate, and
maintain the appliance in accordance with this manual will adversely affect safety,
performance, component life, and warranty coverage and may result in costly water
damage.
To reduce the risk of death, electric shock, serious injury, or re, follow basic
precautions including the following:
• Only qualied service technicians should install and service the appliance.
• The appliance must be installed in accordance with applicable national, state, and
local codes and regulations.
• 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 damage.
• The appliance requires an independent power supply of proper capacity. See the
nameplate for electrical specications. Failure to use an independent power supply
of proper capacity can result in a tripped breaker, blown fuse, damage to existing
wiring, or component failure. This could lead to heat generation or re.
• THE APPLIANCE MUST BE GROUNDED. Failure to properly ground the appliance
could result in death or serious injury.
• To reduce the risk of electric shock, do not touch the power switch or control switch
with damp hands.
• Move the power switch to the "OFF" position and turn off the power supply before
servicing. Lockout/Tagout to prevent the power supply from being turned back on
inadvertently.
• Do not place ngers or any other objects into the ice discharge opening.
• Do not make any alterations to the appliance. Alterations could result in electric
shock, injury, re, or damage.
5
WARNING, continued
• The appliance is not intended for use by persons (including children) with reduced
physical, sensory, or mental capabilities, or lack of experience and knowledge,
unless they have been given supervision or instruction concerning use of the
appliance by a person responsible for their safety.
• Children should be properly supervised around the appliance.
• Do not climb, stand, or hang on the appliance or allow children or animals to do so.
Serious injury could occur or the appliance could be damaged.
• Do not use combustible spray or place volatile or ammable substances near the
appliance. They might catch re.
• Keep the area around the appliance clean. Dirt, dust, or insects in the appliance
could cause harm to individuals or damage to the appliance.
NOTICE
• Follow the water supply, drain connection, and maintenance instructions carefully to
reduce the risk of costly water damage.
• In areas where water damage is a concern, install in a contained area with a oor
drain.
• Install the appliance in a location that stays above freezing. Normal operating
ambient temperature must be within 45°F to 100°F (7°C to 38°C).
• Do not leave the appliance on during extended periods of non-use, extended
absences, or in sub-freezing temperatures. To properly prepare the appliance for
these occasions, follow the instructions in "IV. Preparing the Appliance for Periods
of Non-Use."
• Do not place objects on top of the appliance.
• The ice storage bin is for ice use only. Do not store anything else in the ice storage
bin.
6
I. Specications
A. Electrical and Refrigerant Data
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. For
certication marks, see the nameplate.
We reserve the right to make changes in specications and design without prior notice.
1. DCM-300BAH(-OS)
Single Phase
Model Number DCM-300BAH(-OS)
AC Supply Voltage 115-120/60/1
Compressor 115V 6.0RLA 29.0LRA
Gear Motor 120V 1.45FLA 80W
Fan Motor 115V 0.8FLA 16W
Agitating Motor 115V 0.9FLA 55W
Dispensing Motor 115V 0.9FLA 55W
Other 120V 0.2A
Maximum Fuse Size 20 AMPS
Max. HACR Breaker
(USA Only)
20 AMPS
Max. Circuit Breaker
(Canada Only)
20 AMPS
Minimum Circuit
Ampacity
20 AMPS
Design Pressure HI-460PSI LO-290PSI
Refrigerant 404A 15.9 OZ.
2. DCM-500B_H(-OS)
Single Phase
Model Number DCM-500BAH(-OS) DCM-500BWH(-OS)
AC Supply Voltage 115-120/60/1 115-120/60/1
Compressor 120V 7.5RLA 54.5LRA 120V 7.5RLA 54.5LRA
Gear Motor 120V 2.4FLA 1/4HP 120V 2.4FLA 1/4HP
Fan Motor 120V 1.0FLA 50W - - -
Agitating Motor 120V 0.9FLA 55W 120V 0.9FLA 55W
Dispensing Motor 120V 0.9FLA 55W 120V 0.9FLA 55W
Other 120V 0.2A 115V 0.2A
Maximum Fuse Size 20 AMPS 20 AMPS
Max. HACR Breaker
(USA Only)
20 AMPS 20 AMPS
Max. Circuit Breaker
(Canada Only)
20 AMPS 20 AMPS
Minimum Circuit
Ampacity
20 AMPS 20 AMPS
Design Pressure HI-460PSI LO-290PSI HI-460PSI LO-290PSI
Refrigerant 404A 1 LB 4.1 OZ. 404A 11.5 OZ.
7
3. DCM-751BWH(-OS)
Single Phase
Model Number DCM-751BWH(-OS)
AC Supply Voltage 115-120/60/1
Compressor 115V 14.6RLA 77LRA
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. Circuit Breaker
(Canada Only)
20 AMPS
Minimum Circuit
Ampacity
20 AMPS
Design Pressure HI-460PSI LO-290PSI
Refrigerant 404A 1 LB 6 OZ.
4. DCM-752BAH(-OS)
Single Phase
Model Number DCM-752BAH(-OS)
AC Supply Voltage 115-120/60/1
Compressor 115V 9.4RLA 70LRA
Gear Motor 120V 3.0FLA 1/4HP
Fan Motor 115V 1.75A 1/10HP
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. Circuit Breaker
(Canada Only)
20 AMPS
Minimum Circuit
Ampacity
20 AMPS
Design Pressure HI-455PSI LO-210PSI
Refrigerant 404A 1 LB 10 OZ.
8
Rear
B. Dimensions/Connections
1. Air-Cooled Models (DCM-300BAH(-OS), DCM-500BAH(-OS))
NOTICE
Allow 6" (15 cm) clearance at rear and
sides for proper air circulation and ease
of maintenance and/or service should
they be required. Allow 24"(61cm)
clearance at top to allow for removal of
the auger.
Unit: mm [in.]
DCM-300BAH
DCM-500BAH
DCM-300BAH-OS
DCM-500BAH-OS
A 100 [3.94] NA
B 93 [3.66] NA
C NA 100 [3.94]
D NA 99 [3.90]
E 48 [1.89] NA
F NA 207 [8.14]
DCM-300BAH(-OS)
DCM-500BAH(-OS)
Side
DCM-300BAH(-OS)
DCM-500BAH(-OS)
DCM-300BAH(-OS)
DCM-500BAH(-OS)
Front
9
Unit: mm [in.]
2. Air-Cooled Models (DCM-752BAH(-OS))
NOTICE
Allow 6" (15 cm) clearance at rear and
sides for proper air circulation and ease
of maintenance and/or service should
they be required. Allow 24"(61cm)
clearance at top to allow for removal of
the auger.
DCM-752BAH DCM-752BAH-OS
A 100 [3.94] NA
B 165 [6.5] NA
C NA 100 [3.94]
D NA 165 [6.5]
E 76 [2.99] NA
F NA 284 [11.20]
RearSideFront
10
3. Water-Cooled Models (DCM-500BWH(-OS))
Unit: mm [in.]
NOTICE
Allow 6" (15 cm) clearance at rear and
sides for proper air circulation and ease
of maintenance and/or service should
they be required. Allow 24"(61cm)
clearance at top to allow for removal of
the auger.
DCM-500BWH DCM-500BWH-OS
A 100 [3.94] NA
B 93 [3.66] NA
C NA 100 [3.94]
D NA 99 [3.90]
E 48 [1.89] NA
F NA 207 [8.14]
Rear
Side
Front
11
4. Water-Cooled Models (DCM-751BWH(-OS))
Unit: mm [in.]
NOTICE
Allow 6" (15 cm) clearance at rear and
sides for proper air circulation and ease
of maintenance and/or service should
they be required. Allow 24"(61cm)
clearance at top to allow for removal of
the auger.
DCM-751BWH DCM-751BWH-OS
A 100 [3.94] NA
B 165 [6.5] NA
C NA 100 [3.94]
D NA 165 [6.5]
E 76 [2.99] NA
F NA 284 [11.2]
Rear
Side
Front
12
II. Installation and Operating Instructions
WARNING
• The appliance must be installed in accordance with applicable national, state, and
local codes and regulations.
• Failure to install, operate, and maintain the appliance in accordance with this
manual will adversely affect safety, performance, component life, and warranty
coverage and may result in costly water damage.
• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are
securely in place after installation. Make sure that none have fallen into the ice
storage bin.
A. Location
NOTICE
• The appliance is not intended for outdoor use. Normal operating ambient
temperature must be within 45°F to 100°F (7°C to 38°C); Normal operating
water temperature must be within 45°F to 90°F (7°C to 32°C). Operation of the
appliance, for extended periods, outside of these normal temperature ranges
may affect appliance performance.
• The appliance will not work at sub-freezing temperatures. To prevent damage
to the water supply line, drain the appliance if the air temperature is going to go
below 32°F (0°C). See "IV. Preparing the Appliance for Periods of Non-Use."
• Opti-Serve Model (-OS): Sunlight, direct and indirect, can have an effect on the
operation of the dispense sensors. If a problem is noticed, the appliance should
be moved out of direct sunlight and/or farther away from any outside windows.
• The appliance should not be located next to ovens, grills, or other high heat producing
equipment.
• Allow 6" (15 cm) clearance at rear and sides for proper air circulation and ease of
maintenance and/or service should they be required. Allow 24" (61 cm) clearance at top
to allow for removal of the auger.
• The location should provide a rm and level foundation for the appliance.
13
B. 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 appliance,
it will not work properly.
• See the nameplate on the rear panel, and check that your voltage supplied corresponds
with the voltage specied on the nameplate.
• Remove the panels to prevent damage when installing the appliance. See "II.C. How to
Remove Panels."
• Remove the package containing the accessories.
• Remove the protective plastic lm from the panels. If the appliance is exposed to the
sun or to heat, remove the lm after the appliance cools.
• Check that the refrigerant lines do not rub or touch lines or other surfaces, and that the
fan blade (if applicable) turns freely.
• This appliance can be installed on a countertop or on an optional stand. If using an
optional stand, see the table below. For further options, contact your local Hoshizaki
distributor.
Model Number SD Stand
DCM-300BAH(-OS)
SD-450/SD-500
DCM-500B_H(-OS)
DCM-751BWH(-OS)
SD-700/SD-750
DCM-752BAH(-OS)
• The drip tray on the front of the DCM-751BWH(-OS) and DCM-752BAH(-OS) is
removable for installations using an in-counter drain. Drip tray removal requires
HS-5003 for DCM-751BWH and DCM-752BAH or HS-5002 for DCM-751BWH-OS
and DCM-752BAH-OS.
DCM on Hoshizaki Stand
SD-450 or SD-700
DCM on Hoshizaki Stand
SD-500 or SD-750
DCM-751BWH and
DCM-752BAH with
DripTray Removal Kit
HS-5003
DCM-751BWH-OS and
DCM-752BAH-OS with
DripTray Removal Kit
HS-5002
Model Shown: DCM-752BAH
14
C. How to Remove Panels
See Fig. 1
• Front Panel: Remove the screw. Lift up and towards you. Disconnect the connector on
push-button models.
• Top Panel: Lift up at front slightly, push rearward and lift off.
• Apron Panel: Remove the screws and pull towards you. Disconnect the connectors on
optical-sensor models.
• Side Panel: Remove the screws and pull towards you.
• Ice Storage Bin Cover: Remove the thumbscrews and pull towards you.
Fig. 1
Push-Button Models 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
Ice Storage
Bin Cover
Ice Storage
Bin Cover
15
D. Setup
1) Position the appliance in the selected permanent location. If applicable, attach optional
6" legs or attach to an optional stand. If attaching to a stand, refer to the instructions
included with the stand. If removing the drip tray, refer to the instructions included with
the HS kit (HS-5003 for DCM-751BWH and DCM-752BAH or HS-5002 for
DCM-751BWH-OS and DCM-752BAH-OS).
2) Level the appliance in both the left-to-right and front-to-rear directions. If using optional
6" legs or an optional stand, adjust the legs to make the appliance level.
3) If mounting at to a counter, seal the perimeter where the appliance contacts the
counter with approved caulk compound in a smooth and easily cleanable manner.
4) Replace the panels in their correct positions.
E. Electrical Connection
WARNING
For All Models
• 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 damage.
• The appliance requires an independent power supply of proper capacity. See
the nameplate for electrical specications. Failure to use an independent power
supply of proper capacity can result in a tripped breaker, blown fuse, damage to
existing wiring, or component failure. This could lead to heat generation or re.
• THE APPLIANCE MUST BE GROUNDED. Failure to properly ground the
appliance could result in death or serious injury.
• Electrical connection must be made in accordance with the instructions on the
"WARNING" tag, provided with the pig tail leads in the junction box. See Fig. 3.
• 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 white lead must be connected to the
neutral conductor of the power source.
NOTICE! Miswiring may result in
damage to the appliance.
• The opening for the power supply
connection is 7/8" DIA to t a 1/2" trade
size conduit.
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
16
F. Water Supply and Drain Connections
See Fig. 4, 5, and 6
WARNING
Water supply and drain connections must be installed in accordance with applicable
national, state, and local regulations.
NOTICE
• Normal operating water temperature must be within 45°F to 90°F (7°C to
32°C). Operation of the appliance, for extended periods, outside of this normal
temperature range may affect appliance performance.
• Water supply pressure must be a minimum of 10 PSIG and a maximum of
113PSIG. If the pressure exceeds 113 PSIG, the use of a pressure reducing valve
is required.
• External lters, strainers, or softeners may be required depending on water quality.
Contact your local Hoshizaki Certied Service Representative or local Hoshizaki
distributor for recommendations.
• A plumbing permit and services of a licensed plumber may be required in some areas.
• The ice storage bin drain line, drip tray drain line, and water-cooled condenser drain line
(ifapplicable) 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 2vertical inches (5 cm) must be between the end of the drain pipes from the ice
storage bin, drip tray, and water-cooled condenser (if applicable) and the oor drain.
17
1. Icemaker
• Icemaker water supply inlet is 1/2" female pipe thread (FPT). A minimum of 1/4"
nominal ID copper water tubing or equivalent is required for the icemaker water supply
line.
• An icemaker water supply line shut-off valve and drain valve should be installed.
• Ice storage bin and drip tray drain outlets are 3/4" FPT. A minimum of 3/4" nominal ID
hard pipe or equivalent is required for the ice storage bin and drip tray drain lines.
Ice Storage Bin
Drain Outlet
3/4" FPT
Drip Tray
Drain Outlet
3/4" FPT
Fig. 4
Icemaker
Stand
Icemaker Water Supply Line
Shut-Off Valve
Icemaker Water
Supply Inlet
1/2" FPT
Icemaker Water Supply
Line Drain Valve
Vent
Tube
Minimum 1/4" Nominal ID
Copper Water Tubing or Equivalent
Minimum 3/4" Nominal ID
Hard Pipe or Equivalent
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
Model Shown: DCM-752BAH
18
2. Water-Cooled Condenser
a) Connection to an Open Drain System
• Condenser water supply inlet is 1/2" female pipe thread (FPT). A minimum of
1/4" nominal ID copper water tubing or equivalent is required for the condenser water
supply line.
• A condenser water supply line shut-off valve and drain valve should be installed.
• Condenser drain outlet is 3/8" FPT. A minimum of 1/4" nominal ID hard pipe or
equivalent is required for the condenser drain line.
• In some areas, a back ow preventer may be required in the condenser water supply
line.
• In order to maintain the proper high side pressure, the condenser water supply
inlet 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 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
Fig. 5
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
Ice 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
Minimum 1/4" Nominal ID Copper
Water Tubing or Equivalent
Vent
Tube
Minimum 3/4" Nominal ID
Hard Pipe or Equivalent
Minimum 1/4" Nominal
ID Hard Pipe or
Equivalent
2-inch (5-cm)
air gap
Model Shown: DCM-751BWH
19
b) Connection to a Closed Loop System
• Condenser water supply inlet is 1/2" female pipe thread (FPT). A minimum of
1/4" nominal ID copper water tubing or equivalent is required for the condenser water
supply line.
• Condenser return outlet is 3/8" FPT. A minimum of 1/4" nominal ID copper water tubing
or equivalent is required for the condenser return line.
• Shut-off valves and drain valves should be installed at both the condenser water supply
inlet and condenser return outlet.
• The water supply to the condenser should not drop below 4 GPM.
• The pressure differential between the condenser water supply inlet and condenser
return outlet must be no less than 10 PSIG.
• When using a glycol blend, the solution mixture should be less than 30% glycol.
• In order to maintain the proper high side pressure, the condenser water supply
inlet 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
Icemaker
Stand
Icemaker Water Supply
Line Drain Valve
Ice 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
Minimum 1/4" Nominal ID Copper
Water Tubing or Equivalent
Vent
Tube
Minimum 3/4" Nominal ID
Hard Pipe or Equivalent
2-inch (5-cm)
air gap
Model Shown: DCM-751BWH
20
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 ice
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 rear and sides and 24" (61 cm) at top for proper
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?
OnDCM-751BWH(-OS) and DCM-752BAH(-OS) 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-751BWH and DCM-752BAH or HS-5002 for DCM-751BWH-OS
and DCM-752BAH-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 appliance?
8) Are the water supply and drain lines sized as specied? 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?
9) Is the compressor snug on all mounting pads? 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 appliance and the importance of the recommended periodic maintenance?
12) Has the end user been given the contact information of an authorized service agent?
13) Has the warranty card been lled out and forwarded to the factory for warranty
registration?
21
H. Startup
WARNING
• All parts are factory-adjusted. Improper adjustments may adversely affect safety,
performance, component life, and warranty coverage.
• If the icemaker is turned off, wait for at least 3 minutes before restarting the
icemaker to prevent damage to the compressor.
• At startup, conrm that all internal and external connections are free of leaks.
1) Open the water supply line shut-off valve(s).
2) Move the control switch to the "OFF" position. See Fig. 7.
3) Remove the front panel, then move the power switch to the "ON" position. Replace the
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) Move the control switch to the "ICE" position to start the automatic icemaking process.
5) Once the unit starts to produce ice, allow it to run for another 30 minutes.
6) Move the control switch to the "OFF" position, pause momentarily, then move to the
"DRAIN" position. Allow the water system to drain for 5 minutes.
Note: a) A momentary pause in the "OFF" position is necessary to de-energize the
control board when moving the control switch between "ICE" and "DRAIN."
Otherwise there is a delay of several minutes before the new selection takes
effect.
b) If the control switch is left in the "DRAIN" position for 10 minutes or more, a
2-beep alarm sounds every 5 seconds. Move the control switch out of the
"DRAIN" position to clear the alarm.
7) Move the dispense mode switch to the "CONTINUOUS" position, then dispense all of
the ice from the ice storage bin.
Note: Ice dispenses continuously for a maximum of 60 seconds per activation.
8) Remove the front panel, then remove the ice storage bin cover.
9) Move the control switch to the "ICE" position.
Fig. 7
Power Switch
Safety Switch
Actuator Paddle
Ice Storage
Bin Cover
Control Box Cover
CONTROL
DISPENSE MODE
4A1038-014
ICE
OFF
DRAIN
PORTION
CONTINUOUS
22
10) Conrm bin control operation: Remove the control box cover and ice storage bin cover,
move the control switch to the "ICE" position, then engage the safety switch on the front
frame. See Fig. 7. After the "GM" LED on the control board turns on (5sec.), the 5-min.
ice purge timer starts. Bypass the 5-min. ice purge timer by pressing the "SERVICE"
button on the control board. See Fig.8. WARNING! Risk of electric shock. Care
should be taken not to touch live terminals. Otherwise, wait for the 5-min. ice purge
timer to terminate and the compressor to start. Next, press and hold the actuator paddle
located inside the ice storage bin. WARNING! Keep hands, hair, and loose clothing
clear of the agitator(s) inside the ice storage bin. 6 to 10 sec. later, the 90-sec.
compressor shutdown timer starts. Once the 90-sec. compressor shutdown timer
terminates, the compressor de-energizes and the 60-sec. gear motor shutdown timer
starts. Once the 60-sec. gear motor timer terminates, the gear motor de-energizes.
11) Release the actuator paddle and disengage the safety switch. Move the control switch
to the "OFF" position, then move the power switch to the "OFF" position. Turn off the
power supply. Replace the control box cover and ice storage bin cover in their correct
positions.
12) Clean the ice storage bin liner, cover, and components using a neutral cleaner. Rinse
thoroughly after cleaning. WARNING! CHOKING HAZARD: Ensure all components,
fasteners, and thumbscrews are securely in place. Make sure that none have
fallen into the ice storage bin. Replace the ice storage bin cover in its correct position.
13) Move the power switch to the "ON" position, then replace the front panel in its correct
position. Turn on the power supply, then move the control switch to the "ICE" position to
start the automatic icemaking process.
Fig. 8
"SERVICE" Button
"GM" LED
"COMP" LED
Ice Dispense Time Control
2A9093-01
23
I. Dispense Mode Switch
The dispense mode switch has "CONTINUOUS" and "PORTION" positions. When the
dispense mode switch is in the "CONTINUOUS" position, ice dispenses continuously
for a maximum of 60 seconds per activation. When the dispense mode switch is in
the "PORTION" position, ice dispenses for the 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.
Approximately 1.2 oz. of ice is dispensed per second.
J. Alarm Safeties
Should an alarm occur, follow the instructions in the table below to address the alarm.
If an alarm continues to occur, contact an authorized service agent.
WARNING
• Only qualied service technicians should service the appliance.
• To reduce the risk of electric shock, do not touch the icemaker power switch or
control switch with damp hands.
• Before Servicing: Move the icemaker's power switch to the "OFF" position. Turn
off the power supply. Lockout/Tagout to prevent the power supply from being turned
back on inadvertently.
No. of Beeps
(every 5 sec.)
Type of Alarm Reset Options
1 Low Water Safety
UFS open>90 sec. after WV energized.
Automatic reset once water supply is restored
and UFS closes.
2 Control Switch
In "DRAIN" position longer than 10 min.
Automatic reset once the control switch is
moved to the "ICE" position.
3 High-Pressure Switch
First and second activation in 1 hr.
Automatic reset once pressure drops below
the high pressure threshold and HPS closes.
4 High-Pressure Switch
Third activation in 1 hr.
Call for service. To avoid possible catastrophic
failure, it is recommended to leave the
icemaker off until this alarm is resolved.
Manual reset. Turn power off and on again.
5 Freeze Timer
WV off > 30 min. since last WV activation.
Manual reset. Turn power off and on again.
6 Low Voltage
92VAC±5% or less
"POWER OK" LED turns off if voltage
protection operates.
The control voltage safeties automatically
reset when voltage is corrected.
7 High Voltage
147VAC±5% or more
8 Gear Motor
CCR contacts fail to close.
Manual reset. Turn power off and on again.
Legend: CCR–compressor control relay; UFS–upper oat switch; HPS–high-pressure
switch; WV–inlet water valve
24
III. Maintenance
The appliance must be maintained in accordance with the instruction manual and labels
provided. Consult with your local Hoshizaki Certied Service Representative about
maintenance service.
WARNING
• Only qualied service technicians should service the appliance.
• To reduce the risk of electric shock, do not touch the power switch or control switch
with damp hands.
• Before Servicing: Move the power switch to the "OFF" position. Turn off the power
supply. Lockout/Tagout to prevent the power supply from being turned back on
inadvertently.
• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are
securely in place after any maintenance is done to the appliance. Make sure that
none have fallen into the ice storage bin.
Fig. 9
Spout B
Spout A
Extruding Head
Agitating Motors
1 on DCM-300/500
2 on DCM-751/752
Dispensing Motor
Agitators
1 on DCM-300/500
2 on DCM-751/752
Dispensing
Auger
Power Switch
Reservoir
Bin Control Assembly
Ice Storage Bin Cover
Spout Cover
Evaporator Assembly
Safety Switch
Optical Sensors (-OS Models)
Float Switch Assembly
Ice Guide (DCM-751/752)
Drain Pipe Holder (DCM-751/752)
Drain Pipe (DCM-751/752)
CONTROL
DISPENSE MODE
4A1038-014
ICE
OFF
DRAIN
PORTION
CONTINUOUS
Model Shown: DCM-751BWH-OS
25
A. Maintenance Schedule
The maintenance schedule below is a guideline. More frequent maintenance may be
required depending on water quality, the appliance's environment, and local sanitation
regulations.
Maintenance Schedule
Frequency Area Task
Bi-Weekly 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 cleanser.
Every 6
Months
Icemaker and Ice
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, Ice
Storage Bin, and
Drip Tray Drains
Check to make sure they are clear.
Extruding Head
Seal Bolts
Inspect for leakage around seal bolts. Tighten (see torque value below) or
replace as necessary. Seal bolts must be replaced once removed because
seal material is one-time use only. If new seal bolts do not have preapplied
threadlocker, apply Loctite243 or equivalent threadlocker to seal bolt
threads.
• Torque: 11.1 ft-lb/15 N·m
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)
Check for wear using .02" round stock or pin gauge. Replace both upper
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. See the Service Manual for
details.
26
B. Cleaning and Sanitizing Instructions
The icemaker must be cleaned and sanitized at least twice a year. More frequent
cleaning and sanitizing may be required in some conditions.
WARNING
• To prevent injury to individuals and damage to the icemaker, do not use ammonia
type cleaners.
• Carefully follow any instructions provided with the cleaning and sanitizing
solutions.
• Always wear liquid-proof gloves and goggles to prevent the cleaning and sanitizing
solutions from coming into contact with skin or eyes.
• After cleaning and sanitizing, do not use ice made from the cleaning and sanitizing
solutions. Be careful not to leave any solution on the parts or in the ice storage
bin.
1. Water System
a) Cleaning Solution
Dilute 9.6 . oz. (0.29 l) of Hoshizaki "Scale Away" with 1.6 gal. (6.0 l) of warm water. This
is a minimum amount. Make more solution if necessary. IMPORTANT! For safety and
maximum effectiveness, use the solution immediately after dilution.
b) Cleaning Procedure
1) Close the icemaker water supply line shut-off valve.
2) Move the control switch to the "OFF" position, pause momentarily, then move to the
"DRAIN" position. See Fig. 9. Allow the water system to drain for 5 minutes.
Note: a) A momentary pause in the "OFF" position is necessary to de-energize the
control board when moving the control switch between "ICE" and "DRAIN."
Otherwise there is a delay of several minutes before the new selection takes
effect.
b) If the control switch is left in the "DRAIN" position for 10 minutes or more, a
2-beep alarm sounds every 5 seconds. Move the control switch out of the
"DRAIN" position to clear the alarm.
3) Move the dispense mode switch to the "CONTINUOUS" position, then dispense all of
the ice from the ice storage bin.
4) Move the control switch to the "OFF" position, then turn off the power supply. Remove
the front and top panels, then move the power switch to the "OFF" position.
5) Remove the ice 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.
27
7) Replace spout A, spout B, and the ice storage bin cover in their correct positions.
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) Move the power switch to the "ON" position and replace the panels in their correct
positions. Turn on the power supply, then move the control switch to the "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) Move the control switch to the "OFF" position, pause momentarily, then move to the
"DRAIN" position. Allow the water system to drain for 5 minutes.
12) Move the control switch to the "OFF" position, pause momentarily, then move to the
"ICE" position. Open the icemaker water supply line shut-off valve to supply water to the
reservoir.
13) After the gear motor starts, move the control switch to the "OFF" position, pause
momentarily, then move to the "DRAIN" position. Allow the water system to drain for
5minutes.
Note: If you do not sanitize the unit, move the control switch to the "OFF" position,
pause momentarily, then move to the "ICE" position after the water system drains.
Allow the icemaker to run for 30 minutes, then move the control switch to the
"OFF" position. Turn off the power supply, then remove the front panel and ice
storage bin cover. Move the power switch to the "OFF" position. Go to step 12 in
"III.B.2.c) Cleaning and Sanitizing Procedure."
14) Move the control switch to the "OFF" position, then turn off the power supply.
15) Close the icemaker water supply line shut-off valve.
28
c) Sanitizing Solution
Dilute 0.82 . oz. (25 ml) of a 5.25% sodium hypochlorite solution (chlorine bleach)
with 1.6 gal. (6.0 l) of warm water. This is a minimum amount. Make more solution
if necessary. IMPORTANT! For safety and maximum effectiveness, use the solution
immediately after dilution.
d) Sanitizing Procedure - Following Cleaning Procedure
1) Make sure the control switch is in the "OFF" position, the power supply is off, and the
icemaker water supply line shut-off valve is closed.
2) Remove the front and top panels, then move the power switch to the "OFF" position.
3) Remove the ice 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 ice storage bin cover in their correct positions.
6) Allow the icemaker to sit for 10 minutes before operation.
7) Move the power switch to the "ON" position and replace the panels in their correct
positions. Turn on the power supply, then move the control switch to the "ICE" position.
Make ice using the solution until the icemaker stops making ice.
8) Move the control switch to the "OFF" position, pause momentarily, then move to the
"DRAIN" position. Allow the water system to drain for 5 minutes.
9) Move the control switch to the "OFF" position, pause momentarily, then move to the
"ICE" position. Open the icemaker water supply line shut-off valve to supply water to the
reservoir.
10) After the gear motor starts, move the control switch to the "OFF" position, pause
momentarily, then move to the "DRAIN" position. Allow the water system to drain for
5minutes.
11) Move the control switch to the "OFF" position, pause momentarily, then move to the
"ICE" position. Allow the icemaker to run for 30 minutes, then clean and sanitize the
dispensing components as outlined below.
2. Dispensing Components
Perform after cleaning and sanitizing the water system as outlined above.
a) Cleaning Solution
Dilute 9.6 . oz. (0.29 l) of Hoshizaki "Scale Away" with 1.6 gal. (6.0 l) of warm water.
b) Sanitizing Solution
Dilute 0.82 . oz. (25 ml) of a 5.25% sodium hypochlorite solution (chlorine bleach) with
1.6 gal. (6.0 l) of warm water.
c) Cleaning and Sanitizing Procedure
1) Move the control switch to the "OFF" position, then turn off the power supply.
2) Remove the front and top panels, then move the power switch to the "OFF" position.
29
3) Remove the ice storage bin cover.
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 agitator(s) and the
dispensing auger from the ice storage bin. See Fig. 9.
Note: DCM-300 and DCM-500 models have 1 agitator and DCM-751 and DCM-752
models have 2 agitators.
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. On DCM-751 and DCM-752 models, also remove the ice guide, drain pipe
holder, and drain pipe from the ice storage bin. See Fig. 9.
9) Immerse the agitator(s), dispensing auger, and parts removed in steps 5 through 8
in the cleaning solution for 15 min. Rinse the parts thoroughly with clean water, then
immerse the parts into the sanitizing solution for 15 min. Rinse the parts thoroughly with
clean water. Onoptical sensor 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 ice storage bin and melt any remaining ice. Clean the ice
storage bin liner and the ice storage bin cover using a neutral cleaner. Rinse thoroughly
after cleaning. Replace the ice storage bin cover in its correct position.
13) Move the power switch to the "ON" position, then replace the panels in their correct
positions. Turn on the power supply, then move the control switch to the "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
30
IV. Preparing the Appliance for Periods of Non-Use
NOTICE
When storing the appliance for an extended time or in sub-freezing temperatures,
follow the instructions below to prevent damage.
When the appliance is not used for two or three days under normal conditions, it is
sufficient to move the power switch to the "OFF" position. When storing the appliance for
an extended time or in sub-freezing temperatures, follow the instructions below.
1. Remove the ice from the ice 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) Move the control switch to the "OFF" position, pause momentarily, then move to the
"DRAIN" position. Allow the water system to drain for 5 minutes.
Note: a) A momentary pause in the "OFF" position is necessary to de-energize the
control board when moving the control switch between "ICE" and "DRAIN."
Otherwise there is a delay of several minutes before the new selection takes
effect.
b) If the control switch is left in the "DRAIN" position for 10 minutes or more, a
2-beep alarm sounds every 5 seconds. Move the control switch out of the
"DRAIN" position to clear the alarm.
3) Move the dispense mode switch to the "CONTINUOUS" position, then dispense all of
the ice from the ice storage bin.
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, pause momentarily, then move to the "ICE" position to open the inlet
water valve and briey blow out the inlet water valve. After blowing out the inlet water
valve, move the control switch to the "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 ice storage bin cover. Clean the ice storage bin liner and the ice storage bin
cover using a neutral cleaner. Rinse thoroughly after cleaning. Replace the ice 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) Make sure the control switch and the power switch are in the "OFF" position and that
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
V. Disposal
The appliance contains refrigerant and must be disposed of in accordance with
applicable national, state, and local codes and regulations. Refrigerant must be
recovered by properly certied service personnel.
33
618 Hwy. 74 South, Peachtree City, GA 30269 USA (P) 770.487.2331 (F) 770.487.3360 hoshizakiamerica.com 1A6050-010
