Models
KM-231BAK
KM-301BAK, BWK
Self-Contained Crescent Cuber
Instruction Manual
Issued: 5-8-2025
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.hoshizakiamerica.com. No installation, operation, or
maintenance should be undertaken until the technician has thoroughly read this
Instruction Manual. No service should be undertaken until the technician has
thoroughly read the service manual available at www.hoshizakiamerica.com.
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, operation, 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
E-mail: tech-suppor[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
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.
Contents
Important Safety Information ................................................................................................. 4
I. Specications ..................................................................................................................... 9
A. Construction ................................................................................................................. 9
B. Electrical and Refrigerant Data .................................................................................. 10
C. Dimensions/Connections ............................................................................................11
1. KM-231BAK ...........................................................................................................11
2. KM-301BAK ........................................................................................................... 12
3. KM-301BWK .......................................................................................................... 13
II. Installation and Operating Instructions ............................................................................ 14
A. Location ...................................................................................................................... 14
B. Checks Before Installation ........................................................................................... 16
C. How to Remove Louver .............................................................................................. 16
D. Setup .......................................................................................................................... 17
E. Electrical Connection ................................................................................................. 18
F. Water Supply and Drain Connections ......................................................................... 19
1. Icemaker ............................................................................................................... 20
2. Water-Cooled Condenser ...................................................................................... 21
G. Final Checklist ........................................................................................................... 23
1. Pre-Startup ............................................................................................................. 23
2. Post-Startup ........................................................................................................... 23
III. Operating Instructions ..................................................................................................... 24
A. Important Notes About Usage ..................................................................................... 24
B. Startup and Bin Control Check .................................................................................... 25
IV. Maintenance ................................................................................................................. 27
A. Maintenance Schedule ............................................................................................... 27
B. Cleaning and Sanitizing Instructions .......................................................................... 28
V. Preparing the Appliance for Periods of Non-Use ............................................................ 32
VI. Decommissioning and Disposal ..................................................................................... 34
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.
R-290 Class A3 Flammable Refrigerant Used
DANGER
Indicates a hazardous situation that, if not avoided, will result in
death or serious injury.
WARNING
Indicates a hazardous situation that, if not avoided, could result in
death or serious injury.
NOTICE
Indicates a situation that, if not avoided, could result in damage to
the appliance or property.
IMPORTANT
Indicates important information about the use and care of the
appliance.
DANGER
• Servicing shall be done by trained service
personnel with certied competence
in handling ammable refrigerants to
minimize the risk of possible ignition due
to incorrect parts or improper service.
• Component parts shall be replaced with
like components. so as to minimize the
risk of possible ignition due to incorrect
parts.
• Dispose of properly in accordance with
federal or local regulations.
• Do not pierce or burn.
• Be aware that refrigerants may not contain
an odor.
• Do not damage the refrigeration circuit.
• See nameplate for R-290 refrigerant
charge:
• If greater than 114 g (4 oz.), do not install
in public corridor or lobby.
• If greater than 152 g (5.3 oz.), do not
install within 6 m (20 ft) of open ame.
• The appliance shall be stored in a room
without continuously operating ignition
sources (for example: open ames, an
operating gas appliance, or an operating
electric heater).
Risk of Fire or Explosion
Flammable Refrigerant Used
• Only qualied service technicians should
install and service the appliance.
• No installation, operation, or maintenance
should be undertaken until the technician
has thoroughly read this Instruction
Manual. All safety precautions must be
followed.
• No service should be undertaken until the
technician has thoroughly read the Service
Manual available at
www.hoshizakiamerica.com. All safety
precautions must be followed.
• This appliance to be installed in
accordance with the Safety Standard for
Refrigeration Systems ANSI/ASHRAE 15.
• Follow handling instructions carefully in
compliance with national regulations.
• Do not use mechanical devices or other
means to accelerate the defrosting
process or to clean, other than those
recommended by the manufacturer.
• Do not puncture refrigerant tubing. Risk
of re or explosion due to puncture
of refrigerant tubing; follow handling
instructions carefully.
5
• Do not place any potential ignition sources
in or near the appliance.
• Keep clear of obstruction all ventilation
openings in the appliance enclosure or in
the structure for building-in.
• No potential sources of ignition are to be
used in the searching for or detection of
refrigerant leaks.
• Do not use electrical appliances inside
the appliance unless they are of the type
recommended by the manufacturer.
• Do not store explosive substances such as
aerosol cans with a ammable propellant
in this appliance.
• Check that cabling will not be subject
to wear, corrosion, excessive pressure,
vibration, sharp edges, or any other
adverse environmental effects. The check
shall also take into account the effects of
aging or continual vibration from sources
such as compressors or fans.
• Ensure that the area is in the open or that
it is adequately ventilated before breaking
into the system or conducting any hot
work. A degree of ventilation shall continue
during the period that the work is carried
out. The ventilation should safely disperse
any released refrigerant and preferably
expel it externally into the atmosphere.
DANGER continued
Risque D'Incendie ou D'Explosion
Fluide Frigorigène Inammable Utilisé
• Seuls des techniciens de service qualiés
doivent installer et entretenir l'appareil.
• Aucune installation, opération ou
maintenance ne doit être entreprise avant
que le technicien n'ait lu attentivement
ce manuel d'instructions. Toutes les
précautions de sécurité doivent être
suivies.
• Aucune opération d'entretien ne doit être
entreprise avant que le technicien n'ait
lu attentivement le manuel d'entretien
disponible sur le site
www.hoshizakiamerica.com. Toutes les
précautions de sécurité doivent être
suivies.
• Cet appareil doit être installé
conformément à la norme de sécurité
pour les systèmes de réfrigération
ANSI/ASHRAE 15.
• Suivez attentivement les instructions
de manutention conformément aux
réglements nationaux.
• Ne pas utiliser de dispositifs mécaniques
ou d'autres moyens pour accélérer le
processus de dégivrage ou pour nettoyer,
autres que ceux recommandés par le
fabricant.
• Ne pas perforer la conduite de uide
frigorigène. Risque d'incendie ou
d'explosion en cas de perforation d'une
canalisation de uide frigorigène;
suivez attentivement les instructions de
manutention.
• L’entretien doit être effectué par du
personnel formé et certié pour la
manipulation de réfrigérants inammables
an de réduire au minimum le risque
d'inammation dû à des pièces incorrectes
ou à un entretien inadéquat.
6
DANGER Continué
• Les pièces doivent être remplacées
par des pièces similaires, de manière
à réduire au minimum le risque
d'inammation dû à des pièces
incorrectes.
• Mettre au rebut conformément aux
réglements fédéraux ou locaux.
• Ne pas percer ou brûler.
• Attention, les uides frigorigénes peuvent
ne pas dégager d'odeur.
• Ne pas endommager les composants du
circuit de réfrigération.
• Voir plaque signalétique pour la charge de
réfrigérant R-290:
• Si elle est supérieure à 114 g (4 oz.), ne
pas l'installer dans un couloir public ou
un hall d'entrée.
• Si elle est supérieure à 152 g (5,3 oz.),
ne pas l'installer à moins de 6 m (20 pi)
d'une amme nue.
• L'appareil doit être entreposé dans
un local ne contenant pas de sources
d'inammation permanentes (ammes
nues, appareil à gaz ou dispositif de
chauffage électrique en fonctionnement,
par exemple).
• Ne placer aucune source d'inammation
potentielle à l'intérieur ou à proximité de
l'appareil.
• Ne pas obstruer les ouvertures de
ventilation dans l'enceinte de l'appareil ou
dans la structure d'encastrement.
• Aucune source potentielle d'inammation
ne doit être utilisée pour rechercher ou
détecter des fuites de réfrigérant.
• Ne pas utiliser d'appareils électriques à
l'intérieur de l'appareil, sauf s'ils sont du
type recommandé par le fabricant.
• Ne pas entreposer dans cet appareil
des substances explosives telles que
des bombes aérosols contenant un gaz
propulseur inammable.
• Vérier que le câblage ne sera pas soumis
à l'usure, à la corrosion, à une pression
excessive, à des vibrations, à des arêtes
vives ou à tout autre effet environnemental
négatif. Le contrôle doit également prendre
en compte les effets du vieillissement ou
des vibrations continues provenant de
sources telles que les compresseurs ou
les ventilateurs.
• S'assurer que la zone est à l'air libre ou
qu'elle est correctement ventilée avant de
pénétrer dans le système ou d'effectuer un
travail à chaud. Une certaine ventilation
doit être maintenue pendant la durée des
travaux. La ventilation doit permettre de
disperser en toute sécurité tout réfrigérant
libéré et, de préférence, de l'expulser dans
l'atmosphère.
7
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:
• This appliance is not intended for use
above 2,000 m (6,561 ft).
Installation above 2,000 m (6,561 ft) may
adversely affect safety, performance, and
component life.
• Wear appropriate personal protective
equipment (PPE) when servicing 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 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. The appliance is equipped
with a NEMA5-15 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 qualied 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 follow these
instructions may result in death, electric
shock, or re.
• To reduce the risk of electric shock, do not
touch the control switch or plug with damp
hands.
• To reduce the risk of electric shock, make
sure the control switch is in the "OFF"
position before plugging in or unplugging
the appliance.
• Unplug the appliance before servicing.
• 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.
• Do not use an extension cord.
• If the supply cord is damaged, it must
be replaced by the manufacturer, its
service agent, or similarly qualied
persons in order to avoid a hazard. Upon
replacement, the GREEN ground wire in
the power cord must be connected to the
designated grounding screw.
• Do not make any alterations to the
appliance. Alterations could result in
electric shock, injury, re, or damage to
the appliance.
• Appliance is heavy. Use care when lifting
or positioning. Work in pairs when needed
to prevent injury or damage.
8
NOTICE
• To help ensure that the ice storage bin
drain remains clear, follow the instructions
in "IV.B.Cleaning and Sanitizing
Instructions" once a year or as often as
necessary for conditions. If the ice storage
bin drain becomes clogged, water could
build up in the bin and overow, leading to
costly water damage.
• 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
"V. Preparing the Appliance for Periods of
Non-Use."
• If water collects in the bin and will not
drain, turn off the icemaker and close the
water supply line shut-off valve. Call for
service.
• If water seeps from the base of the
appliance, turn off the appliance and close
the water supply line shut-off valve. Call
for service. Failure to do so could lead to
costly water damage.
• 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.
• Protect the oor when moving the
appliance to prevent damage to the oor.
• Do not allow the appliance to bear any
outside weight.
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.
• Do not splash, pour, or spray water
directly onto or into the appliance. This
might cause short circuit, electric shock,
corrosion, or failure.
• Children should be supervised to ensure
that they do not play with 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.
• Be careful not to pinch ngers when
opening and closing the door. Be careful
when opening and closing the door when
children are in the area.
• Do not use combustible spray or place
volatile or ammable substances in or
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 icemaker in a location that stays
above freezing. Normal operating ambient
temperature must be within 45°F to 100°F
(7°C to 38°C).
9
I. Specications
A. Construction
Top Panel
Ice Making
Mechanism
Front Panel
Control Switch
Louver
Bin Control
Bin Door
Power Cord
Service Switch
Air Filter
Louver and
Air Filter
Control Box
Model Shown: KM-231BAK
10
B. Electrical and Refrigerant Data
The nameplate provides electrical and refrigerant data and Year of Manufacture (YOM).
The nameplate is located inside the ice storage bin. For certication marks, see the
nameplate.
We reserve the right to make changes in specications and design without prior notice.
Model Number KM-231BAK
AC SUPPLY VOLTAGE ~115/60/1
AMPERES 5.2
DESIGN PRESSURE kPa (PSI) HI-3103 (450) LO-1448 (210)
REFRIGERANT g (oz.) R-290 115 (4.1)
CLIMATIC CLASS 5
INSULATION BLOWING GAS HFO 1233zd(E)
MINIMUM ROOM FLOOR AREA m² (ft² ) 5.5 (59.2)
HARVEST RATE ≤1,000 LB/DAY (BATCH)
Model Number KM-301BAK KM-301BWK
AC SUPPLY VOLTAGE ~115/60/1 ~115/60/1
AMPERES 5.7 x.x
DESIGN PRESSURE kPa (PSI) HI-3103 (450) LO-1448 (210) HI-xxxx (xxx) LO-xxxx (xxx)
REFRIGERANT g (oz.) R-290 135 (4.8) R-290 xxx (x.x)
CLIMATIC CLASS 5 5
INSULATION BLOWING GAS HFO 1233zd(E) HFO 1233zd(E)
MINIMUM ROOM FLOOR AREA m² (ft² ) 6.5 (69.5) x.x (xx.x)
HARVEST RATE ≤1,000 LB/DAY (BATCH) ≤1,000 LB/DAY (BATCH)
Note: Climatic Class 5: This appliance electrical safety tested for operation in maximum
ambient temperature of 104°F (40°C) with 40% relative humidity. However,
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.
DATA PENDING
11
NOTICE
Allow at least 2" (5 cm)
clearance at the right side for
proper air circulation and at least
5/8" (15 mm) clearance at top
for ease of maintenance and/or
service should they be required.
C. Dimensions/Connections
1. KM-231BAK
Unit: mm [inches]
12
NOTICE
Allow at least 2" (5 cm)
clearance at the right side for
proper air circulation and at least
5/8" (15 mm) clearance at top
for ease of maintenance and/or
service should they be required.
2. KM-301BAK
Unit: mm [inches]
13
3. KM-301BWK
Unit: mm [inches]
NOTICE
Allow at least 2" (5 cm)
clearance at the right side for
proper air circulation and at
least 5/8" (15 mm) clearance
at top for ease of maintenance
and/or service should they be
required.
14
II. Installation and Operating Instructions
WARNING
• This appliance must be installed in accordance with applicable national, state,
and local codes and regulations.
• This appliance to be installed in accordance with the Safety Standard for
Refrigeration Systems ANSI/ASHRAE 15.
• 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
1. General
This appliance uses an A3 ammable refrigerant. For refrigerant charge and minimum
room oor area, see the table below.
DANGER
R-290 Class A3 Flammable Refrigerant Used
Model
R-290 Refrigerant
Charge g (oz.)
Minimum Room Floor Area
(operating or storage)
Surface Minimale De Plancher
(l'exploitation ou le stockage)
m² (ft²)
KM-231BAK 115 (4.1) 5.5 (59.2)
KM-301BAK 135 (4.8) 6.5 (69.5)
≥ Area m
2
(ft
2
) (see "Minimum Room Floor Area" above)
≥ Supercie m
2
(pi
2
) (voir « Surface Minimale De Plancher » ci-dessus)
15
DANGER continued
R-290 Refrigerant Charge:
• If greater than 114 g (4 oz.), do not install in public corridor or lobby.
• If greater than 152 g (5.3 oz.), do not install within 6 m (20 ft) of open ame.
Charge de réfrigérant R-290:
• Si elle est supérieure à 114 g (4 oz.), ne pas l'installer dans un couloir public ou
un hall d'entrée.
• Si elle est supérieure à 152 g (5,3 oz.), ne pas l'installer à moins de 6 m (20 pi)
d'une amme nue.
This appliance is not intended for use above 2,000 m (6,561 ft). Installation above
2,000 m (6,561 ft) may adversely affect safety, performance, and component life.
NOTICE
• 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 icemaker, for extended periods, outside of these normal
temperature ranges may affect icemaker performance.
• This appliance will not work at sub-freezing temperatures. To prevent damage
to the water supply line, drain the icemaker if the air temperature is going to go
below 32°F (0°C). See "V. Preparing the Icemaker for Periods of Non-Use."
• The appliance should not be located next to ovens, grills, or other high heat producing
equipment.
• In areas where water damage is a concern, install in a contained area with a oor drain.
• Allow at least 2" (5 cm) clearance at the right side for proper air circulation and at least
5/8" (15 mm) clearance at top for ease of maintenance and/or service should they be
required.
• The location must provide a rm and level foundation for the appliance.
16
Separator
(inside)
Door
Magnet Catch
Air Filter*
Louver
* KM-231BAK, KM-301BAK only
Air Inlet*
(Air Filter)
How to remove Louver
Fig. 1
B. Checks Before Installation
NOTICE
• Remove all shipping cartons, tape, and packing material. If any are left in the
appliance, it will not work properly.
• Remove the shipping tape holding the door and separator. See Fig. 1.
• 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 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 refrigerant lines do not rub or touch lines or other surfaces, and that the fan
blade (if applicable) turns freely.
• Check that the compressor is snug on all mounting pads.
• See the nameplate inside the bottom front of the right side panel (behind the louver),
and check that your voltage supplied corresponds with the voltage specied on the
nameplate.
C. How to Remove Louver
See Fig. 1
• Louver: Pull the top towards you, and lift off when the magnet catches come off the
body.
17
D. Setup
NOTICE
• Do not place more than 33 lb. (15 kg) on the top panel.
• Do not use the frame to lift the appliance. Lift the appliance from the base.
• Handle the appliance carefully to avoid damaging the exterior.
1) Unpack the appliance, and remove all shipping cartons, tape, and packing material
BEFORE operating the appliance.
2) Position the appliance in its
permanent location.
3) Level the appliance in both the
left-to-right and the front-to-rear
directions (when installed with or
without legs). See Fig. 2.
4) 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.
5) If installing the unit with legs on the
bottom, use the four accessory legs
adjustable from 6" (15.2 cm) to 7"
(17.8 cm). Screw the legs tightly into
the tapped holes in the base.
See Fig. 3.
Max. 0.2" (5mm)
[0.3°]
Base
Adjustable Leg
Fig. 2
Tapped Hole
(Leg Mounting)
Fig. 3
18
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 severe damage to equipment.
• This 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: This appliance is equipped with a
NEMA 5-15 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 qualied 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 follow these instructions may result in death, electric
shock, or re.
• Do not use an extension cord.
• To reduce the risk of electric shock, make sure the control switch is in the "OFF"
position before plugging in or unplugging the appliance.
• To reduce the risk of electric shock, do not touch the control switch or plug with
damp hands.
• 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.
• If the supply cord is damaged, it must be replaced by the manufacturer, its
service agent, or similarly qualied persons in order to avoid a hazard. Upon
replacement, the GREEN ground wire in the power cord must be connected to
the designated grounding screw.
• Usually an electrical permit and services of a licensed electrician are required.
• The maximum allowable voltage variation is ±10 percent of the nameplate rating.
19
F. Water Supply and Drain Connections
See Figs. 4 through 6
WARNING
• Water supply and drain connections must be installed in accordance with
applicable national, state, and local regulations.
• Connect to potable water supply only. Do not connect to a hot-water supply.
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 (68.9 kPa) and a maximum
of 113PSIG (779.1 kPa). If the pressure exceeds 113 PSIG (779.1 kPa), the use
of a pressure reducing valve is required.
• To prevent damage to the appliance, do not operate the appliance when the
water supply is off, or if the pressure is below 10 PSIG (68.9 kPa). Do not run the
appliance until the proper water pressure is reached.
• 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.
• In areas where water damage is a concern, install in a contained area with a oor
drain.
• Water line installation to the appliance is not warranted by Hoshizaki.
• Water-hammer issues must be resolved by a qualied plumber before installing
the appliance. Water hammer can cause appliance damage that may lead to
water leakage or ooding.
• A plumbing permit and services of a licensed plumber may be required in some areas.
• Be sure there is sufficient extra water supply line and drain line for the appliance to be
pulled out for service.
• Drain outlet is 1/2” FPT. A minimum of 1/2” nominal ID hard pipe or equivalent is
required for the drain line. Installing a smaller diameter drain line will reduce water ow
and may lead may lead to water leakage or ooding. Be sure there is sufficient extra
drain line for the unit to be pulled out for service.
• The icemaker 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. Extend the vent at least
12” (30 cm) above the drain outlet.
• 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 and water-cooled condenser (if applicable) and the oor drain.
20
KM-231BAK
KM-301BAK
Vent Tube
Shut-off Valve
Minimum 1/4" Nominal ID Copper
Water Tubing or Equivalent
Minimum 3/4" Nominal ID
Hard Pipe or Equivalent
1/4" fall per foot
Drain Valve
To approved
oor drain
Be sure there is sufficient
extra water supply line and
drain line for the appliance to
be pulled out for service.
Separate piping to approved
drain. Leave a 2" (5 cm)
vertical air gap between the
end of each pipe and the
drain.
2" (5 cm)
air gap
Floor
Drain
Icemaker Water Supply Inlet
1/2" FPT
Icemaker Drain Outlet
3/4" FPT
Fig. 4
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
• A minimum of 1/4” nominal ID copper water tubing or equivalent is required for the
icemaker water supply line.
• Water supply inlet is 1/2” female pipe thread (FPT).
• A water supply line shut-off valve and drain valve must be installed.
• Water supply pressure must be a minimum of 10 PSIG (68.9 kPa) and a maximum
of 113 PSIG (779.1 kPa). If the pressure exceeds 113 PSIG (779.1 kPa), the use of a
pressure reducing valve is required.
21
Minimum 1/4" Nominal ID
Copper Water Tubing or
Equivalent
Icemaker Drain
Outlet 3/4" FPT
Shut-off Valve
1/4" fall
per foot
To approved
oor drain
Floor
Condenser Water
Supply Inlet 1/2" FPT
2" (5 cm)
air gap
Drain
Be sure there is sufficient
extra water supply line
and drain line for the
appliance to be pulled
out for service.
Separate piping to
approved drain. Leave a
2" (5 cm) vertical air gap
between the end of each
pipe and the drain.
KM-301BWK
Icemaker Water Supply
Inlet 1/2" FPT
Vent Tube
Minimum 3/4" Nominal ID
Hard Pipe or Equivalent
Drain Valve
Condenser Drain
Outlet 1/2" FPT
Drain Valve
Minimum 1/4" Nominal ID
Hard Pipe or Equivalent
Minimum 1/4" Nominal ID
Copper Water Tubing or
Equivalent
Shut-off Valve
Fig. 5
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
1/2" 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, 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.
22
Icemaker Drain
Outlet 3/4" FPT
Icemaker Water Supply
Inlet 1/2" FPT
Minimum 1/4" Nominal ID
Copper Water Tubing or
Equivalent
Condenser Water Supply
Inlet 1/2" FPT
Shut-off Valve
Condenser Return
Outlet 1/2" FPT
Minimum 1/4" Nominal ID
Copper Water Tubing or
Equivalent
To approved
oor drain
Drain
KM-301BWK
Minimum 3/4" Nominal ID
Hard Pipe or Equivalent
Vent Tube
Drain Valve
1/4" fall
per foot
Floor
2" (5 cm)
air gap
Shut-Off Valve
Shut-off Valve
Drain Valve
Drain Valve
Fig. 6
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
1/2" 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 (68.9 kPa).
• 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.
23
G. Final Checklist
1. Pre-Startup
1) Is the appliance level?
2) Is the appliance 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 2" (5 cm) clearance at the right side and at least 5/8" (15 mm)
clearance at top?
4) Have all shipping cartons, tape, and packing material been removed from the
appliance? Are the cube guides in their correct positions?
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 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 (68.9 kPa) and a maximum of 113 PSIG
(779.1 kPa)?
8) Are all components, fasteners, and thumbscrews securely in place?
9) Continue to "III.B. Startup."
2. Post-Startup
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) Has the bin control operation been conrmed?
2) Are all components, fasteners, and thumbscrews securely in place?
3) 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?
4) Has the end user been given the contact information of an authorized service agent?
5) Has the warranty card been lled out and forwarded to the factory for warranty
registration?
24
III. Operating Instructions
R-290 Class A3 Flammable Refrigerant Used
DANGER
Risk of Fire or Explosion. Flammable Refrigerant Used.
• Be sure to follow all Important Safety Information located at the beginning of this
manual.
• 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 is costly water damage.
• Keep clear of obstruction all ventilation openings in the appliance enclosure or in the
structure for building-in.
Risque D'Incendie ou D'Explosion. Fluide Frigorigène Inammable Utilisé.
• Veillez à respecter toutes les consignes de sécurité importantes gurant au début de
ce manuel.
• Le fait de ne pas installer, utiliser et entretenir l'appareil conformément à ce manuel
aura des conséquences négatives sur la sécurité, les performances, la durée de vie
des composants et la couverture de la garantie, et peut entraîner des dégâts des
eaux coûteux.
• Ne pas obstruer les ouvertures de ventilation dans l'enceinte de l'appareil ou dans la
structure d'encastrement.
A. Important Notes About Usage
NOTICE
• Protect the oor when moving the appliance to prevent damage to the oor.
• To help ensure that the ice storage bin drain remains clear, follow the instructions
in "IV.B.Cleaning and Sanitizing Instructions" once a year or as often as
necessary for conditions. If the ice storage bin drain becomes clogged, water
could build up in the ice storage bin and overow, leading to costly water damage.
• If water collects in the bin and will not drain, turn off the appliance and close the
water supply line shut-off valve. Call for service.
• 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 "V. Preparing the Appliance for Periods
of Non-Use."
• Keep ventilation openings, in the appliance enclosure or in the built-in structure,
clear of obstruction.
• 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.
25
B. Startup and Bin Control Check
WARNING
• All parts are factory-adjusted. Improper adjustments may adversely affect safety,
performance, component life, and warranty coverage.
• To reduce the risk of electric shock, do not touch the power switch, control switch,
or plug (on corded models) with damp hands. If you have to slide the appliance
back for a built-in installation, make sure you do not damage or pinch the water
supply line, drain line, or power cord.
NOTICE
• If the appliance is turned off, wait for at least 3 min. before restarting the appliance
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) Remove the louver.
3) Make sure the control switch is in the "OFF" position. Plug the appliance into the
electrical outlet. WARNING! To reduce the risk of electric shock, do not touch the
control switch or plug with damp hands. If you have to slide the appliance back
for a built-in installation, make sure you do not damage or pinch the water supply
line, drain line, or power cord.
4) Move the control switch to the "ICE" position.
5) Allow the appliance to operate for 10 minutes.
6) Move the control switch to the "SERVICE"
position. Move the service switch to the
"WASH" position.
7) Allow the appliance to operate for 5 minutes.
8) Move the service switch to the "DRAIN" position.
9) Allow the appliance to drain for 2 minutes.
10) Move the control switch to the "OFF"
position, then unplug the appliance from
the electrical outlet.
11) Open the door.
12) Clean the ice storage bin using a neutral
cleaner. Rinse thoroughly after cleaning.
13) Make sure the control switch is in the
"OFF" position. Plug the appliance into the
electrical outlet.
14) Move the control switch to the "ICE" position.
15) Replace the louver in its correct position.
SER
W
VIC
OFF
CIRCULATE
ICE
DRAIN
AS
E
H
Control Box
Control Switch
Service Switch
Fig. 7
26
16) To conrm bin control operation, press the bin control’s actuator paddle during the
rst 5 minutes of the freeze cycle. The compressor and fan motor (if applicable)
should de-energize within 15 seconds, then the drain valve should energize until the
water tank empties. After the water tank empties, the pump motor and drain valve
should de-energize.
17) Close the door.
18) Return to "II.G.2. Post-Startup" and complete nal checklist.
27
IV. Maintenance
The appliance must be maintained in accordance with the instruction manual and
labels provided with the appliance. Consult with your local Hoshizaki Certied Service
Representative about maintenance service. To obtain the name and phone number of
your local Hoshizaki Certied Service Representative, visit www.hoshizakiamerica.com.
WARNING
• Only qualied service technicians should service the appliance.
• Failure to install, operate, and maintain the appliance in accordance with this manual
will adversely affect safety, performance, component life, and warranty coverage.
• To reduce the risk of electric shock, do not touch the control switch or power switch
with damp hands.
• 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.
• After service, make sure that there are no wires pinched between the panels and
appliance. Make sure you do not damage or pinch the water supply line or drain line,
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
Daily Scoop Clean the ice scoop using a neutral cleaner. Rinse thoroughly after
cleaning.
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.
Appliance 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.
Yearly Appliance and Ice
Storage Bin Liner
Clean and sanitize per the cleaning and sanitizing instructions
provided in this manual or on the maintenance label on the icemaker.
Water Supply Inlet Close the icemaker water supply line shut-off valve and drain the
water system. Clean the water supply inlet screen.
Condenser Inspect. Clean if necessary by using a brush or vacuum cleaner. More
frequent cleaning may be required depending on location.
Water Hoses Inspect the water hoses and clean/replace if necessary.
28
B. Cleaning and Sanitizing Instructions
The appliance must be cleaned and sanitized at least once a year. More frequent
cleaning and sanitizing may be required in some water conditions.
WARNING
• To prevent injury to individuals and damage to the appliance, do not use ammonia
type cleaners.
• Carefully follow any instructions provided with the bottles of cleaning and
sanitizing solution.
• 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.
NOTICE
To prevent damage to the water pump, do not leave the control switch in the
"SERVICE" position for extended periods of time when the water tank is empty.
1. Cleaning Procedure
1) Dilute 5 . oz. (148 ml) of recommended cleaner Hoshizaki "Scale Away" with 1 gallon
(3.8 l) of water.
2) Remove the louver. Remove all ice from the evaporator and the ice storage bin.
Note: To remove cubes on the evaporator, move the control switch to the "OFF" position
and move it back to the "ICE" position after 3 minutes. The harvest cycle starts and the
cubes will be removed from the evaporator.
3) Move the control switch to the "OFF" position.
4) Move the service switch to the "DRAIN" position, then move the control switch to the
"SERVICE" position.
5) After 2 minutes, move the control switch to the "OFF" position.
6) Pour the cleaning solution into the water tank. Move the service switch to the "WASH"
position, then move the control switch to the "SERVICE" position.
7) After 30 minutes, move the control switch to the "OFF" position.
8) Move the service switch to the "DRAIN" position, then move the control switch to the
"SERVICE" position.
9) After 2 minutes, move the control switch to the "OFF" position.
10) Move the control switch to the "ICE" position to ll the water tank with water.
11) After 3 minutes, move the service switch to the "WASH" position, then move the control
switch to the "SERVICE" position.
12) After 5 minutes, move the control switch to the "OFF" position.
13) Move the service switch to the "DRAIN" position, then move the control switch to the
"SERVICE" position.
29
Thumbscrew
14) Repeat steps 9 through 13 three more times to rinse thoroughly.
15) After 2 minutes, move the control switch to the "OFF" position.
16) Disconnect the overow pipe. Next, remove the water tank by removing the two
thumbscrews and pulling the tank towards you slightly and pushing it down. Be careful
to avoid breakage when handling the parts. See Fig. 8.
Fig. 8
17) Pull the cube guides (quantity varies depending on model) upward to remove them from
the water tank. They are snapped in place. See Fig. 9.
18) Dilute 5 . oz. (148 ml) of recommended cleaner Hoshizaki "Scale Away" with 1 gallon
(3.8 lit.) of water.
Cube Guides
* The bin control switch is accessible by
removing the water tank.
Water Tank
Fig. 9
Bracket (L)
Evaporator
Cube Guides
Water Tank
Bracket (R)
Overow Pipe)
30
Float Switch
Fig. 10
19) Wash the bin control switch, water tank, oat switch, cube guides, and overow pipe by
using a nylon scouring pad, brushes and the cleaning solution. See Fig. 10. In addition
to the removed parts, also wash the bin liner and brackets (L) and (R) with the solution.
20) Discard the cleaning solution and rinse the parts thoroughly with water.
31
2. Sanitizing Procedure - Following Cleaning Procedure
1) Dilute approximately 0.31 . oz. (9.2 ml) of an 8.25% sodium hypochlorite solution
(chlorine bleach) with 1 gallon (3.8 lit.) of warm water. Using a chlorine test strip or
other method, conrm that you have a concentration of about 200 ppm.
2) Soak the removed parts from step 19 above in a clean container containing the
sanitizing solution. After allowing the parts to soak for 10 minutes, wash them with the
solution. Also wash the bin liner and brackets (L) and (R) with the solution.
3) Discard the sanitizing solution and rinse the parts thoroughly with water.
4) Replace the removed parts in their correct positions in the reverse order of which they
were removed.
5) Dilute approximately 0.31 . oz. (9.2 ml) of an 8.25% sodium hypochlorite solution
(chlorine bleach) with 1 gallon (3.8 lit.) of warm water. Using a chlorine test strip or
other method, conrm that you have a concentration of about 200 ppm.
6) Pour the sanitizing solution into the water tank, and allow the sanitizer to sit for 10
minutes.
7) Move the service switch to the "WASH" position, then move the control switch to the
"SERVICE" position.
8) After 15 minutes, move the control switch to the "OFF" position.
9) Move the service switch to the "DRAIN" position, then move the control switch to the
"SERVICE" position.
10) After 2 minutes, move the control switch to the "OFF" position.
11) Repeat steps 5 through 10 one time. Repeat steps 9 through 13 in the Cleaning
Procedure three times to rinse thoroughly.
12) After 2 minutes, move the control switch to the "OFF" position.
13) Flush the ice storage bin with water.
14) Move the control switch to the "ICE" position to start the automatic icemaking process.
15) Close the door. Replace the louver in its correct position.
32
V. Preparing the Appliance for Periods of Non-Use
WARNING
Only qualied service technicians should service this appliance.
NOTICE
• During extended periods of non-use, extended absences, or in sub-freezing
temperatures, follow the instructions below to reduce the risk of costly water
damage.
• When the appliance is not used for two or three days under normal conditions, it
is sufficient to move the control switch to the "OFF" position.
• To prevent damage to the water pump, do not leave the control switch in the
"SERVICE" position for extended periods of time when the water tank is empty.
1. Remove the water from the icemaker water supply line:
1) Remove the louver if it has not already been removed.
2) Move the control switch to the "OFF" position.
3) Wait 3 minutes.
4) Close the icemaker water supply line shut-off valve and open the icemaker water supply
line drain valve.
5) Allow the line to drain by gravity.
6) Attach compressed air or carbon dioxide supply to the icemaker water supply line drain
valve.
7) Move the control switch to the "ICE" position.
8) Quickly blow the icemaker water supply line out using compressed air or carbon dioxide.
2. Drain the water tank:
1) Move the service switch to the"DRAIN" position, then move the control switch to the
"SERVICE" position.
2) After 2 minutes, move the control switch to the "OFF" position. Unplug the appliance
from the electrical outlet.
3) Open the door. Remove all ice from the ice storage bin and clean the ice storage bin.
4) Close the door.
5) Replace the louver in its correct position.
6) Close the icemaker water supply line drain valve.
3. On water-cooled model only, remove the water from the water-cooled condenser:
1) Make sure the control switch is in the "OFF" position and the appliance is unplugged
from the electrical outlet.
33
2) Remove the top and left side panels.
3) 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. See Fig. 5 or 6.
4) Open the condenser water supply line drain valve. If connected to a closed loop system,
also open the condenser return line drain valve.
5) Attach a compressed air or carbon dioxide supply to the condenser water supply line
drain valve.
6) 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.
7) Close the condenser water supply line drain valve. If connected to a closed loop system,
also close the condenser return line drain valve.
8) Replace the left side and top panels in their correct positions.
34
VI. Decommissioning and Disposal
R-290 Class A3 Flammable Refrigerant Used
DANGER
Risk of Fire or Explosion. Flammable Refrigerant Used.
• Only qualied service technicians should install and service the appliance.
• Follow handling instructions carefully in compliance with national regulations.
• Dispose of properly in accordance with federal or local regulations.
• Do not puncture refrigerant tubing. Risk of re or explosion due to puncture of
refrigerant tubing; follow handling instructions carefully.
• Be sure to follow the full Decommissioning and Disposal information located in the
Service Manual for this model. The Service Manual is available at
www.hoshizakiamerica.com.
Risque D'Incendie ou D'Explosion. Fluide Frigorigène Inammable Utilisé.
• Seuls des techniciens de service qualiés doivent installer et entretenir l'appareil.
• Suivre attentivement les instructions de manutention conformément aux réglements
nationaux.
• Mettre au rebut conformément aux conformément aux réglements fédéraux ou
locaux.
• Ne pas perforer la conduite de uide frigorigène. Risque d'incendie ou d'explosion
en cas de perforation d'une canalisation de uide frigorigène; suivez attentivement
les instructions de manutention.
• Veiller à respecter l'ensemble des informations relatives à la mise hors service et
à la mise au rebut gurant dans le manuel d'entretien de ce modèle. Le manuel
d'entretien est disponible à l'adresse suivante: www.hoshizakiamerica.com.
618 Hwy. 74 South, Peachtree City, GA 30269 USA (P) 770.487.2331 (F) 770.487.3360 hoshizakiamerica.com 1A7787-010
