Hoshizaki DKM-500BAJ User manual

Models
DKM-500BAJ, BWJ
Crescent Cube Icemaker / Dispenser
Instruction Manual
Issued: 12-12-2016
hoshizakiamerica.com

2
WARNING
Only qualied service technicians should install and service the appliance. To
obtain the name and phone number of your local Hoshizaki Certied 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 qualied 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: [phone]
Fax: [phone]
E-mail: [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. Specications...................................................................................................................... 6
A. Electrical and Refrigerant Data ..................................................................................... 6
B. Dimensions/Connections .............................................................................................. 7
1. DKM-500BAJ ........................................................................................................... 7
2. DKM-500BWJ.......................................................................................................... 8
II. Installation and Operating Instructions .............................................................................. 9
A. Location ........................................................................................................................ 9
B. Checks Before Installation........................................................................................... 10
C. How to Remove Panels................................................................................................11
D. Setup........................................................................................................................... 12
E. Electrical Connection .................................................................................................. 13
F. Water Supply and Drain Connections .......................................................................... 14
1. Icemaker ................................................................................................................ 15
2. Water-Cooled Condenser....................................................................................... 16
G. Final Checklist ............................................................................................................ 18
H. Startup ........................................................................................................................ 19
III. Maintenance ................................................................................................................... 21
A. Maintenance Schedule................................................................................................ 21
B. Cleaning and Sanitizing Instructions ........................................................................... 22
1. Cleaning Procedure – Icemaker............................................................................. 22
2. Sanitizing Procedure – Icemaker ........................................................................... 24
3. Cleaning Procedure – Storage Bin ........................................................................ 24
4. Sanitizing Procedure – Storage Bin ....................................................................... 24
IV. Preparing the Appliance for Periods of Non-Use ............................................................ 26
V. Disposal ........................................................................................................................... 28
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 qualied service technicians should install and service the appliance.
• The appliance must be installed in accordance with applicable national, state, and
local codes and regulations.
• The appliance requires an independent power supply of proper capacity. See
the nameplate for electrical specications. 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: The appliance is equipped with a
NEMA5-20 three-prong grounding plug to reduce the risk of potential shock
hazards. It must be plugged into a properly grounded, independent 3-prong wall
outlet. If the outlet is a 2-prong outlet, it is your personal responsibility to have
a qualied electrician replace it with a properly grounded, independent 3-prong
wall outlet. Do not remove the ground prong from the power cord and do not use
an adapter plug. Failure to properly ground the appliance could result in death or
serious injury.
• Do not use an extension cord.
• To reduce the risk of electric shock, do not touch the control switch, service switch,
or plug with damp hands. Make sure the control switch is in the "OFF" position
before plugging in or unplugging the appliance.
• Do not use an appliance with a damaged power cord. The power cord should not
be altered, jerked, bundled, weighed down, pinched, or tangled. Such actions could
result in electric shock or re. To unplug the appliance, be sure to pull the plug, not
the cord, and do not jerk the cord.

5
WARNING, continued
• Do not make any alterations to the appliance. Alterations could result in electric
shock, injury, re, or damage to the appliance.
• 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). If the normal
operating ambient temperature is above 90°F (32°C), the compressor insulation
cover must be removed.
• 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 storage bin is for ice use only. Do not store anything else in the storage bin.

6
I. Specications
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
certication marks, see the nameplate.
We reserve the right to make changes in specications and design without prior notice.
Model Number DKM-500BAJ DKM-500BWJ
AC Supply Voltage 115/60/1 115/60/1
Amperes 13.5 AMPS 12 AMPS
Design Pressure HI-467PSI LO-170PSI HI-427PSI LO-230PSI
Refrigerant 404A 1 LB. 12.2 OZ. 404A 1 LB. 2 OZ.

7
B. Dimensions/Connections
1. DKM-500BAJ
Unit: mm [in.]

8
2. DKM-500BWJ
Unit: mm [in.]

9
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
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). If the normal operating
ambient temperature is above 90°F (32°C), the compressor insulation cover
must be removed. 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."
• The appliance should not be located next to ovens, grills, or other high heat producing
equipment.
• On air-cooled model, allow at least 12" (30 cm) clearance on the left side and 6" (15 cm)
clearance at rear, right side, and top for proper air circulation and ease of maintenance
and/or service should they be required. On water-cooled model, allow 6"(15 cm)
clearance at rear, sides, and top.
• The location should provide a rm and level foundation for the appliance.

10
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 specied 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.
• Check that the compressor is snug on all mounting pads.

11
Fig. 1
Top Panel
Side Panel
(R1)
Side Panel
(Lower)
Side Panel
(Lower)
Side Panel
(L1)
Front Insulation
Panel
Front Panel
Connector
C. How to Remove Panels
See Fig. 1
• Front Panel: Remove the screw, lift up and slightly towards you. Disconnect the
connector from the control box.
• Top Panel: Lift up at front slightly, push rearward, and lift off.
• Side Panels (R1 and L1): Remove the top panel. Remove the screw. Slide forward
slightly, and lift off.
• Side Panels (lower): Remove the top panel. Remove the screws and lift off.
• Top and Front Instulation Panels: Remove the top panel. Remove side panel (L1), then
lift up and out.
Top Insulation
Panel

12
D. Setup
1) Install the leg protectors to the 4 adjustable legs, then attach the legs to the bottom of
the icemaker. See Fig. 2.
2) Position the icemaker in the selected permanent location.
3) Level the icemaker in both the left-to-right and front-to-rear directions. Adjust the legs to
make the icemaker level.
4) NOTICE! If the normal operating ambient temperature is above 90°F (32°C),
remove the compressor insulation cover.
Fig. 2
Adjustable Leg
Control Box
Connector
Screw
Front Panel
Side Panel (Lower)
(removed in illustration
for clarity)
Leg Protector
Compressor Insulation Cover

13
E. Electrical Connection
WARNING
• Electrical connection must meet national, state, and local electrical code
requirements. Failure to meet these code requirements could result in death,
electric shock, serious injury, re, or damage.
• The appliance requires an independent power supply of proper capacity. See
the nameplate for electrical specications. 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: The appliance is equipped with a
NEMA5-20 three-prong grounding plug to reduce the risk of potential shock
hazards. It must be plugged into a properly grounded, independent 3-prong wall
outlet. If the outlet is a 2-prong outlet, it is your personal responsibility to have
a qualied electrician replace it with a properly grounded, independent 3-prong
wall outlet. Do not remove the ground prong from the power cord and do not use
an adapter plug. Failure to properly ground the appliance could result in death or
serious injury.
• Do not use an extension cord.
• To reduce the risk of electric shock, do not touch the control switch, service
switch, or plug with damp hands. Make sure the control switch is in the "OFF"
position before plugging in or unplugging the appliance.
• Do not use an appliance with a damaged power cord. The power cord should not
be altered, jerked, bundled, weighed down, pinched, or tangled. Such actions
could result in electric shock or re. To unplug the appliance, be sure to pull the
plug, not the cord, and do not jerk the cord.
• The GREEN ground wire in the factory-installed power cord is connected to the
appliance. If it becomes necessary to remove or replace the power cord, be sure
to connect the power cord's ground wire to this screw upon reattachment.
• Usually an electrical permit and services of a licensed electrician are required.
• The maximum allowable voltage variation is ±10 percent of the nameplate rating.
• For optional water dispenser kit installation, refer to the instruction manual included with
the kit.

14
F. Water Supply and Drain Connections
See Figs. 3 through 5
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
113PSIG. 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 Certied Service Representative or local Hoshizaki
distributor for recommendations.
• In areas where water damage is a concern, install in a contained area with a oor
drain.
• A plumbing permit and services of a licensed plumber may be required in some areas.
• The icemaker drain line, storage bin drain line, and water-cooled condenser drain line (if
applicable) must be run separately.
• Drain lines must have 1/4" fall per foot (2 cm per 1 m) on horizontal runs to get a good
ow. A vented tee connection is also required for proper ow.
• Drain lines should not be piped directly to the sewer system. An air gap of a minimum of
2vertical inches (5 cm) should be between the end of the drain pipes from the icemaker,
storage bin, and water-cooled condenser (if applicable) and the oor drain.

15
Shut-Off Valve
Drain Valve
Icemaker
Water Supply
Inlet
1/2" FPT
Storage Bin
Drain Outlet
3/4" FPT
Icemaker
Drain Outlet
3/4" FPT
1. Icemaker
Icemaker Water
Supply Inlet
Minimum Icemaker
Water Supply Line Size
Icemaker Drain
Outlet
Minimum Icemaker
Drain Line Size
1/2" Female Pipe
Thread (FPT)
1/4" Nominal ID
Copper Water Tubing or
Equivalent
3/4" Female Pipe
Thread (FPT)
3/4" Nominal
ID Hard Pipe or
Equivalent
• An icemaker water supply line shut-off valve and drain valve must be installed.
• Be sure there is sufficient extra water supply line and drain line for the appliance to be
pulled out for service.
Icemaker
Minimum 1/4" Nominal ID Copper Water
Tubing or Equivalent
Minimum 3/4" Nominal ID Hard Pipe or Equivalent
Vent Tube
Minimum 3/4" Nominal ID Hard Pipe or Equivalent
Vent Tube
2-inch (5-cm) air gap
Floor Drain
Separate piping to
approved drain. Leave a
two-inch (5 cm) vertical air
gap between the end of
each pipe and the drain.
Be sure there is sufficient
extra water supply line and
drain line for the appliance
to be pulled out for service.
Fig. 3
Model Shown:
DKM-500BAJ
Air-Cooled Model

16
2. Water-Cooled Condenser
a) Connection to an Open Drain System
Condenser Water
Supply Inlet
Minimum Condenser
Water Supply Line Size
Condenser Drain
Outlet
Minimum Condenser
Drain Line Size
1/2" Female Pipe
Thread (FPT)
1/4" Nominal ID Copper
Water Tubing or Equivalent
3/8" Female Pipe
Thread (FPT)
1/4" Nominal ID Hard Pipe
or Equivalent
• A condenser water supply line shut-off valve and drain valve must be installed.
• In some areas, a back ow preventer may be required in the cooling water circuit.
• 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, conrm 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).
Icemaker
Drain Outlet
3/4" FPT
Icemaker Water
Supply Inlet
1/2" FPT
Condenser Water
Supply Inlet
1/2" FPT
Condenser Drain
Outlet 3/8" FPT
Storage Bin Drain
Outlet 3/4" FPT
Shut-Off Valve
Drain Valve
Shut-Off Valve
Drain Valve
Vent Tube
Vent Tube
Vent Tube
Icemaker
Minimum 1/4"
Nominal ID Copper
Water Tubing or
Equivalent
Minimum 3/4" Nominal ID
Hard Pipe or Equivalent
Minimum 1/4"
Nominal ID Hard
Pipe or Equivalent
Floor Drain
Separate piping to approved
drain. Leave a 2-inch (5-cm)
vertical air gap between the
end of each pipe and the
drain.
Be sure there is sufficient
extra water supply line and
drain line for the appliance
to be pulled out for service.
2-inch (5-cm) air gap
Minimum 1/4" Nominal ID Copper
Water Tubing or Equivalent
Minimum 3/4" Nominal ID
Hard Pipe or Equivalent
Fig. 4 Water-Cooled Model
Connection to an Open Drain System
Model Shown:
DKM-500BWJ

17
Icemaker Drain
Outlet 3/4" FPT
Icemaker Water
Supply Inlet 1/2" FPT
Condenser Water
Supply Inlet 1/2" FPT
Condenser Return
Outlet 3/8" FPT
Storage Bin Drain
Outlet 3/4" FPT
Shut-Off Valve
Drain Valve
Drain Valve
Shut-Off Valve
Vent Tube
Vent Tube
b) Connection to a Closed Loop System
Condenser Water
Supply Inlet
Minimum Condenser
Water Supply Line Size
Condenser
Return Outlet
Minimum Condenser
Return Line Size
1/2" Female Pipe
Thread (FPT)
1/4" Nominal ID Copper
Water Tubing or Equivalent
3/8" Female Pipe
Thread (FPT)
1/4" Nominal ID Copper
Water Tubing or Equivalent
• Shut-off valves and drain valves must be installed at both the condenser water supply inlet
and condenser return outlet.
• Minimum water ow to the condenser is 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 return outlet
temperature must be in the 104°F to 115°F (40°C to 46°C) range. Once the icemaker
installation is complete, conrm the condenser return outlet temperature 5 minutes after a
freeze cycle starts. If the condenser return 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).
Icemaker
Minimum 1/4" Nominal
ID Copper Water
Tubing or Equivalent
Minimum 1/4" Nominal
ID Copper Water Tubing
or Equivalent
Minimum 3/4"
Nominal ID Hard
Pipe or Equivalent
Minimum 3/4" Nominal ID
Hard Pipe or Equivalent
Floor Drain
Separate piping to approved
drain. Leave a 2-inch (5-cm)
vertical air gap between the
end of each pipe and the
drain.
Be sure there is sufficient
extra water supply line and
drain line for the appliance
to be pulled out for service.
2-inch (5-cm) air gap
Fig. 5 Water-Cooled Model
Connection to a Closed-Loop System
Model Shown:
DKM-500BWJ

18
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? If
the normal operating ambient temperature is above 90°F (32°C), has the compressor
insulation cover been removed?
3) Air-Cooled Model: Is there at least 12" (30 cm) clearance on the left side and 6" (15 cm)
clearance at rear, right side, and top?
Water-Cooled Model: Is there at least 6" (15 cm) clearance at rear, sides, and top?
4) Have the shipping carton, tape, and packing material been removed from the icemaker?
Is the cube guide in the correct position?
5) Have all electrical and water connections been made? Do electrical and water
connections meet applicable national, state, and local code and regulation
requirements?
6) Has the power supply voltage been checked or tested against the nameplate rating? Is
the power supply a properly grounded, independent 3-prong wall outlet?
7) Are the water supply and drain lines sized as specied? 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?
8) 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?
9) 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?

19
H. Startup
WARNING
All parts are factory-adjusted. Improper adjustments may adversely affect safety,
performance, component life, and warranty coverage.
NOTICE
• If the icemaker is turned off, wait for at least 3 minutes before restarting the
icemaker to prevent damage to the compressor.
• The pump motor is energized continuously when the control switch is in the
"SERVICE" position.
• At startup, conrm that all internal and external connections are free of leaks.
1) Open the water supply line shut-off valve(s).
2) Remove the front panel and disconnect the connector from the control box (if the front
panel is not already removed).
3) Make sure the control switch on the control box is in the "OFF" position, then plug the
icemaker into the electrical outlet.
4) Move the control switch to the "ICE" position.
5) Replace the front panel in its correct position.
6) Allow the icemaker to operate for 5 minutes to ll the water tank.
7) Remove the front panel, then move the service switch to the "WASH" position. Move the
control switch to the "SERVICE" position.
8) Replace the front panel in its correct position and allow the icemaker to run for
5 minutes.
9) Remove the front panel, then move the service switch to the "DRAIN" position.
10) Replace the front panel in its correct position and allow the icemaker to drain for
2 minutes.
11) Remove the front panel, then move the control switch to the "OFF" position. Unplug the
icemaker from the electrical outlet.
12) Disconnect the bin control connector. See Fig. 6. Remove the 3 thumbscrews securing
the bin cover, then remove the bin cover with the bin control attached.
Thumbscrew
Bin Cover
Bin
Control
Connector
Storage Bin
Fig. 6
Bin Control
Actuator Paddle

20
13) Clean the storage bin liner using a neutral cleaner. Rinse thoroughly after cleaning.
14) Reconnect the bin control connector.
15) Plug the icemaker back in. Move the control switch to the "ICE" position to start the
automatic icemaking process.
16) To conrm bin control operation, press and hold the bin control's actuator paddle during
the rst 5 minutes of the freeze cycle. The icemaker should shut down in approximately
5 seconds.
17) Replace the bin cover in its correct position.
18) Reconnect the connector from the front panel to the control box and replace the front
panel in its correct position.
19) On water-cooled model, conrm proper condenser drain outlet/return outlet
temperature as outlined in "II.F.2. Water-Cooled Condenser."