Models
KM-350MAJ, MWJ
KM-420MAJ, MWJ, MRJZ
KM-520MAJ, MWJ, MRJZ
KM-660MAJ, MWJ, MRJZ
Modular Crescent Cuber
Instruction Manual
Issued: 6-10-2022
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
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 ...................................................................................................................... 6
A. Electrical and Refrigerant Data ..................................................................................... 6
1. KM-350M_J .............................................................................................................. 6
2. KM-420M_J(Z) ......................................................................................................... 6
3. KM-520M_J(Z) ......................................................................................................... 7
4. KM-660M_J(Z) ......................................................................................................... 7
B. Dimensions/Connections .............................................................................................. 8
1. Air-Cooled Models (MAJ) ......................................................................................... 8
2. Water-Cooled Models (MWJ) ................................................................................... 9
3. Remote Models (MRJZ)......................................................................................... 10
4. Remote Condenser Unit URC-5FZ (use with KM-420MRJZ, KM-520MRJZ, or KM-
660MRJZ) ..............................................................................................................11
II. Installation and Operating Instructions ............................................................................ 12
A. Location ...................................................................................................................... 12
B. Checks Before Installation ........................................................................................... 13
C. How to Remove Panels ............................................................................................... 13
D. Setup ........................................................................................................................... 14
E. Electrical Connection .................................................................................................. 15
F. Water Supply and Drain Connections .......................................................................... 16
G. Installation of Remote Condenser Unit for Remote Models ........................................ 20
1. Location ................................................................................................................. 20
2. Checks Before Installation ..................................................................................... 21
3. Setup ..................................................................................................................... 21
4. Line Set Size and Refrigerant Charge ................................................................... 21
5. Line Set Installation ............................................................................................... 22
6. Electrical Connection ............................................................................................. 26
7. Stacking Remote Condenser Unit .......................................................................... 27
H. Final Checklist ............................................................................................................. 28
1. Pre-Startup ............................................................................................................. 28
2. Post-Startup ........................................................................................................... 29
I. Startup .......................................................................................................................... 30
1. Bin Control Setting ................................................................................................. 30
2. Appliance Startup and Bin Control Check ............................................................. 33
III. Maintenance ................................................................................................................... 35
A. Maintenance Schedule ................................................................................................ 35
B. Cleaning and Sanitizing Instructions ........................................................................... 36
IV. Preparing the Appliance for Periods of Non-Use ............................................................ 38
V. Disposal ........................................................................................................................... 40
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 ICEMAKER MUST BE GROUNDED. Failure to properly ground the icemaker
could result in death or serious injury.
• Move the control 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.
• To reduce the risk of electric shock, do not touch the control switch or mode switch
with damp hands.
• Do not make any alterations to the appliance. Alterations could result in electric
shock, serious injury, re, or damage.
• 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.
5
WARNING, continued
• 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.
Additional Warning for Remote Models
• THE REMOTE CONDENSER UNIT MUST BE GROUNDED. The power supply and
ground connection to the remote condenser unit are supplied from the icemaker.
Failure to properly ground the remote condenser unit could result in death or
serious injury.
• Wire routing (conduit) and disconnect (if required) 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.
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 dispenser unit/ice storage bin is for ice use only. Do not store anything else in
the dispenser unit/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. KM-350M_J
Single Phase
Model Number KM-350MAJ KM-350MWJ
AC Supply Voltage 115/60/1 115/60/1
Compressor 115V 7.5RLA 50LRA 115V 6.8RLA 50LRA
Pump 120V 0.4FLA 10W 120V 0.4FLA 10W
Fan 115V 1.0FLA 1/15 HP --- --- ---
Other 115V 0.15A 115V 0.15A
Maximum Fuse Size 15 AMPS 15 AMPS
Max. HACR Breaker
(USA Only)
15 AMPS 15 AMPS
Max. Circuit Breaker
(Canada Only)
15 AMPS 15 AMPS
Minimum Circuit
Ampacity
15 AMPS 15 AMPS
Design Pressure HI-467PSI LO-250PSI HI-427PSI LO-250PSI
Refrigerant 404A 1 LB. 3.4 OZ. 404A 11.6 OZ.
2. KM-420M_J(Z)
Single Phase
Model Number KM-420MAJ KM-420MWJ KM-420MRJZ
AC Supply Voltage 115/60/1 115/60/1 115/60/1
Compressor 115V 8.9RLA 54.5LRA 115V 7.8RLA 54.5LRA 115V 8.9RLA 54.5LRA
Pump 120V 0.5FLA 10W 120V 0.5FLA 10W 120V 0.5FLA 10W
Fan 120V 1.0FLA 1/15 HP --- --- --- 120V 3A MAX
Other 115V 0.15A 115V 0.15A 115V 0.15A
Maximum Fuse Size 20 AMPS 20 AMPS 20 AMPS
Max. HACR Breaker
(USA Only)
20 AMPS 20 AMPS 20 AMPS
Max. Circuit Breaker
(Canada Only)
20 AMPS 20 AMPS 20 AMPS
Minimum Circuit
Ampacity
20 AMPS 20 AMPS 20 AMPS
Design Pressure HI - 467PSI LO - 250PSI HI - 427PSI LO - 250PSI HI - 467PSI LO - 250PSI
Refrigerant 404A 1 LB 10.8 OZ. 404A 12.7 OZ. R404A
Total Refrigerant Charge with
Hoshizaki Remote Condenser
Unit URC-5FZ: 4 LB. 2.7 OZ.
7
3. KM-520M_J(Z)
Single Phase
Model Number KM-520MAJ KM-520MWJ KM-520MRJZ
AC Supply Voltage 115/60/1 115/60/1 115/60/1
Compressor 115V 8.9RLA 54.5LRA 115V 7.8RLA 54.5LRA 115V 8.4RLA 54.5LRA
Pump 120V 0.5FLA 10W 120V 0.5FLA 10W 120V 0.5FLA 10W
Fan 120V 1.0FLA 1/15 HP --- --- --- 120V 3A MAX
Other 115V 0.15A 115V 0.15A 115V 0.15A
Maximum Fuse Size 20 AMPS 20 AMPS 20 AMPS
Max. HACR Breaker
(USA Only)
20 AMPS 20 AMPS 20 AMPS
Max. Circuit Breaker
(Canada Only)
20 AMPS 20 AMPS 20 AMPS
Minimum Circuit
Ampacity
20 AMPS 20 AMPS 20 AMPS
Design Pressure HI - 467PSI LO - 250PSI HI - 427PSI LO - 250PSI HI - 467PSI LO - 250PSI
Refrigerant 404A 1 LB 10.8 OZ. 404A 12.7 OZ. R404A
Total Refrigerant Charge with
Hoshizaki Remote Condenser
Unit URC-5FZ: 4 LB. 2.7 OZ.
4. KM-660M_J(Z)
Single Phase
Model Number KM-660MAJ KM-660WJ KM-660MRJZ
AC Supply Voltage 115/60/1 115/60/1 115/60/1
Compressor 115V 13.5RLA 77LRA 115V 11.7RLA 77LRA 115V 12.6RLA 77LRA
Pump 120V 0.5FLA 10W 120V 0.5FLA 10W 120V 0.5FLA 10W
Fan 120V 1.0FLA 1/15 HP --- --- --- 120V 3A MAX
Other 115V 0.15A 115V 0.15A 115V 0.15A
Maximum Fuse Size 20 AMPS 20 AMPS 20 AMPS
Max. HACR Breaker
(USA Only)
20 AMPS 20 AMPS 20 AMPS
Max. Circuit Breaker
(Canada Only)
20 AMPS 20 AMPS 20 AMPS
Minimum Circuit
Ampacity
20 AMPS 20 AMPS 20 AMPS
Design Pressure HI - 467PSI LO - 250PSI HI - 467PSI LO - 250PSI HI - 467PSI LO - 250PSI
Refrigerant 404A 1 LB. 9.8 OZ. 404A 15.2 OZ. R404A
Total Refrigerant Charge with
Hoshizaki Remote Condenser
Unit URC-5FZ: 4 LB. 2.7 OZ.
8
B. Dimensions/Connections
1. Air-Cooled Models (MAJ)
Units: mm [in.]
Rear
Side
Bottom
NOTICE
• Allow 6" (15 cm) clearance at rear,
sides, and top for proper air circulation
and ease of maintenance and/or
service should they be required.
• The storage bin opening must
match the bottom opening as in the
illustration.
9
2. Water-Cooled Models (MWJ)
Units: mm [in.]
NOTICE
• Allow 6" (15 cm) clearance at rear,
sides, and top for proper air circulation
and ease of maintenance and/or
service should they be required.
• The storage bin opening must
match the bottom opening as in the
illustration.
Side
Rear
Bottom
10
3. Remote Models (MRJZ)
Units: mm [in.]
Rear
Side
Bottom
NOTICE
• Allow 6" (15 cm) clearance at rear,
sides, and top for proper air circulation
and ease of maintenance and/or
service should they be required.
• The storage bin opening must
match the bottom opening as in the
illustration.
11
Icemaker
Model
URC-5FZ Heat of Rejection
AT 90°F (32°C)
WT 70°F (21°C)
KM-420MRJZ 6,200 BTU/h
KM-520MRJZ 6,200 BTU/h
KM-660MRJZ 8,100BTU/h
NOTICE
Allow 24" (61cm) clearance at front
and rear for proper air circulation and
ease of maintenance and/or service
should they be required.
4. Remote Condenser Unit URC-5FZ (use with KM-420MRJZ, KM-520MRJZ,
or KM-660MRJZ)
Units: mm [in.]
Rear
Top
12
II. Installation and Operating Instructions
WARNING
• The icemaker must be installed in accordance with applicable national, state, and
local codes and regulations.
• Failure to install, operate, and maintain the icemaker 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
dispenser unit/ice storage bin.
A. Location
NOTICE
• The icemaker 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
icemaker, for extended periods, outside of these normal temperature ranges may
affect icemaker performance.
• The icemaker will not work at sub-freezing temperatures. To prevent damage
to the water supply line, drain the icemaker if the air temperature is going to go
below 32°F (0°C). See "IV. Preparing the Appliance for Periods of Non-Use."
• The icemaker should not be located next to ovens, grills, or other high heat producing
equipment.
• Allow 6" (15 cm) clearance at rear, sides, and top for proper air circulation and ease of
maintenance and/or service should they be required.
• The location should provide a rm and level foundation for the equipment.
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 icemaker,
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 icemaker. See "II.C. How to
Remove Panels."
• Remove the package containing the accessories.
• Remove the protective plastic lm from the panels. If the icemaker is exposed to the sun
or to heat, remove the lm after the icemaker cools.
• Check that the refrigerant lines do not rub or touch lines or other surfaces, and that the
fan blade (if applicable) turns freely.
• Check that the compressor is snug on all mounting pads.
• The icemaker can be installed on a dispenser unit or ice storage bin. The ice storage
bins listed below are recommended.
Model Number Bin Width Recommended Hoshizaki Ice Storage Bin
KM-350M_J
KM-420M_J(Z)
KM-520M_J(Z)
KM-660M_J(Z)
22" or Wider B-300 Series
For further options, contact your local Hoshizaki distributor.
• NOTICE! Remote models must be connected to an appropriate remote condenser
unit. The remote condenser units listed below are recommended. Connection to a
different remote condenser unit will void the warranty unless Hoshizaki approves
a different remote condenser unit for your specic application. For further
details, contact your local Hoshizaki distributor.
Model Number Recommended Hoshizaki Remote Condenser Unit
KM-420MRJZ
KM-520MRJZ
KM-660MRJZ
URC-5FZ
C. How to Remove Panels
See Fig. 1
• Front Panel: Remove the screw. Lift up and
towards you.
• Top Panel: Lift up at front slightly, push rearward
and lift off.
• Right Side Panel: Remove the screw. Slide forward
slightly and lift off.
• Front Insulation Panel: Lift up slightly and pull
towards you.
• Base Cover: Lift up slightly and pull towards you.
Fig. 1
Model Shown: KM-520MAJ
Top Panel
Front Insulation Panel
Front
Panel
Base Cover
Screw
Right Side Panel
14
D. Setup
1. Dispenser Unit/Ice Storage Bin and Icemaker Setup
WARNING
• The installer must ensure the dispenser unit/ice storage bin is compatible with
the icemaker, and the dispenser unit/ice storage bin and icemaker are properly
attached and secured.
• Do not allow top kits to interfere with the bin control lens sensing area or the
icemaker will not operate properly.
1) If mounting the icemaker on top of a dispenser unit, follow the dispenser unit's setup
procedure. If mounting the icemaker on top of an ice storage bin, unpack the ice storage
bin and attach the 4 adjustable legs provided (bin accessory) to the bottom of the ice
storage bin.
2) Position the dispenser unit/ice storage bin in its permanent location.
3) If required, install an adapter kit or top kit. Contact your local Hoshizaki distributor for
recommendations.
4) Level the dispenser unit/ice storage bin in both the left-to-right and front-to-rear
directions. Ifusing an ice storage bin, adjust the ice storage bin legs to level.
5) Place the icemaker on top of the dispenser unit/ice storage bin.
6a) Dispenser Unit: Follow the dispenser unit, adapter kit, or top kit instructions for
securing the icemaker. If no instructions are available, secure the icemaker using the
mounting brackets provided. Rotate the mounting brackets so that they t ush to the
dispenser unit. SeeFig.2a. Secure the mounting brackets to the icemaker with the bolts
provided. Secure the mounting brackets to the dispenser unit with self-tapping screws
(not provided). NOTICE! Use care to avoid damage to dispenser unit components
when attaching the mounting brackets. For dispenser unit bin control setting see
"II.I.1. Bin Control Setting."
6b) Ice Storage Bin: Follow the ice storage bin, adapter kit, or top kit instructions for
securing the icemaker. If no instructions are available, secure the icemaker using the
2mounting brackets and the bolts provided. See Fig.2b.
Fig. 2a
Fig. 2b
Icemaker
Dispenser
Unit
Self-Tapping
Screws
(Not Provided)
Bolts
Mounting
Brackets
Icemaker
Ice
Storage
Bin
Mounting
Brackets
Bolts
15
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 icemaker 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 ICEMAKER MUST BE GROUNDED. Failure to properly ground the icemaker
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. See Fig. 3.
Additional Warnings for Remote Models
• THE REMOTE CONDENSER UNIT MUST BE GROUNDED. Power supply and
ground connection to the remote condenser unit are supplied from the icemaker.
See "II.G.6. Electrical Connection." Failure to properly ground the remote
condenser unit could result in death or serious injury.
• To reduce the risk of electric shock, make all remote condenser unit connections
before connecting the icemaker power supply.
NOTICE
On remote models, the appliance must have power for a minimum of 4hours prior
to startup to prevent compressor damage.
• Usually an electrical permit and services of
a licensed electrician are required.
• The maximum allowable voltage variation is
±10 percent of the nameplate rating.
• On 115/60/1 models, the white lead must
be connected to the neutral conductor of
the power source. NOTICE! Miswiring
may result in severe damage to the
icemaker.
• The opening for the power supply
connection is 7/8" DIA to t a 1/2" trade
size conduit.
KM-350M_J
KM-420M_J(Z)
KM-520M_J(Z)
KM-660M_J(Z)
115/60/1
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.
JUNCTION BOX
1
15V
BLACK
WHITE
L
N
Fig. 3
16
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.
NOTICE
• Normal operating water temperature should 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.
• 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. 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.
• A plumbing permit and services of a licensed plumber may be required in some areas.
• The icemaker drain line, dispenser unit/ice storage bin drain line, and water-cooled
condenser drain line (if applicable) must be run separately. The condensation drain line
can be connected to the icemaker drain line or can 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) should be between the end of the drain pipes from the icemaker
and condensation drain, dispenser unit/ice storage bin, and water-cooled condenser
(ifapplicable) and the oor drain.
17
1. Icemaker
Icemaker Water
Supply Inlet
Minimum Icemaker
Water Supply Line Size
Icemaker Drain
Outlet
Minimum Icemaker
Drain Line Size
Condensation
Drain Outlet
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
3/8" OD Hard
Tube
• 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.
Fig. 4
Model Shown:
KM-520MAJ
Air-Cooled and Remote Models
Icemaker
Water Supply
Inlet
1/2" FPT
Icemaker
Drain Outlet
3/4" FPT
Vent Tube
Bin Drain Outlet
3/4" FPT
Minimum 3/4" Nominal ID
Hard Pipe or Equivalent
Minimum 1/4" Nominal ID Copper
Water Tubing or Equivalent
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
Shut-Off Valve
Drain Valve
Icemaker
Condensation
Drain Outlet
3/8" OD Hard Tube
18
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, 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).
Icemaker
Ice
Storage
Bin
Water-Cooled Models
Connection to an Open Drain System
Fig. 5
Model Shown:
KM-520MWJ
Icemaker Water
Supply Inlet
1/2" FPT
Condenser Water
Supply Inlet
1/2" FPT
Condenser
Drain Outlet
3/8" FPT
Vent Tube
Icemaker
Condensation
Drain Outlet
3/8" OD Hard Tube
Icemaker
Drain Outlet
3/4" FPT
Vent Tube
Bin Drain Outlet
3/4" FPT
Minimum 3/4" Nominal ID
Hard Pipe or Equivalent
Shut-Off Valve
Minimum 1/4" Nominal ID Copper
Water Tubing or Equivalent
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
Drain Valve
Minimum 1/4" Nominal ID
Hard Pipe or Equivalent
19
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, conrm 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).
Shut-Off Valve
Icemaker
Drain Outlet
3/4" FPT
Icemaker Water
Supply Inlet
1/2" FPT
Fig. 6
Condenser Water
Supply Inlet
1/2" FPT
Condenser
Return Outlet
3/8" FPT
Separate piping to approved
drain. Leave a 2" (5 cm)
vertical air gap between the
end of each pipe and the
drain.
Icemaker
Bin Drain Outlet
3/4" FPT
Floor
Drain
Drain Valve
Water-Cooled Models
Connection to a Closed Loop System
Model Shown:
KM-660MWJ
Ice
Storage
Bin
Icemaker
Condensation
Drain Outlet
3/8" OD Hard Tube
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
Vent Tube
Be sure there is sufficient
extra water supply line and
drain line for the appliance to
be pulled out for service.
2" (5 cm) air gap
20
G. Installation of Remote Condenser Unit for Remote Models
WARNING
• Installation of remote condenser unit must be performed by properly trained and
EPA-certied service personnel.
• The remote condenser unit must be installed in accordance with applicable
national, state, and local codes and regulations.
• Failure to install the remote condenser unit within these guidelines may adversely
affect safety, performance, component life, and warranty coverage.
• Power supply and ground wire to the remote condenser unit are supplied from the
icemaker. For details, see section "II.G.6. Electrical Connection."
1. Location
NOTICE
• The remote condenser unit is intended for outdoor use. Normal operating ambient
temperature must be within -20°F to +122°F (-29°C to +50°C). Operation of the
remote condenser unit, for extended periods, outside of this normal temperature
range may affect appliance performance.
• The maximum line length for the standard line sizes and refrigerant charge is
66' (20 m). With larger line sizes and/or additional refrigerant, the maximum line
length is 100' (30.5 m). For details, see "II.G.4 Line Set Size and Refrigerant
Charge."
• The maximum vertical distance between the remote condenser unit and the
icemaker is 33' (10 m) above or 10' (3 m) below the icemaker. These distances
are measured tting to tting. See Fig. 7.
The remote condenser unit must be positioned in a permanent site under the following
guidelines:
• A rm and at site.
• A dry and well ventilated area with 24" (61cm) clearance at front and rear for proper air
circulation and ease of maintenance and/or service should they be required. See Fig. 8.
Min. 24" (61 cm) Clearance
Air Air
Icemaker
Remote
Condenser
Unit
Service Loop
Max.
33'
(10 m)
Remote
Condenser
Unit
Max.
10'
(3 m)
Icemaker
Service Loop
Fig. 7
Fig. 8
21
2. Checks Before Installation
1) Remove the shipping carton, tape, and packing material.
2) Check that the refrigerant lines do not rub or touch lines or other surfaces, and that the
fan blades move freely.
3. Setup
1) Assemble 2 sets of legs using the legs, bolts, and
nuts provided. See Fig. 9.
2) Position 1 of the plates provided between a set of
legs and the remote condenser unit, then secure
the legs to the remote condenser unit with the
bolts and nuts provided. Repeat on the other side
with the remaining set of legs.
3) The bottom of each leg has a mounting hole.
Secure the legs to the permanent site with 4 bolts
(not included).
4. Line Set Size and Refrigerant Charge
NOTICE
The icemaker, line set, and remote condenser unit must contain the same type
of refrigerant. Mixing of refrigerants will result in improper operation and possible
damage to the refrigeration system.
Line Set Size and Refrigerant Charge
Hoshizaki
Icemaker
Hoshizaki
Remote
Condenser
Unit
Line Set
Up to 66' (20 m)
Line Set
Greater than 66' (20 m)
Maximum 100' (30.5 m)
Liquid
Line
Discharge
Line
Charge
Adjustment
Liquid
Line
Discharge
Line
Charge Adjustment
(R-404A)
KM-420MRJZ
KM-520MRJZ
KM-660MRJZ
URC-5FZ 1/4"
OD
3/8" OD Not
Applicable
3/8"
OD
1/2" OD Add 16.5 oz. (468g)
to compensate for
larger diameter line
sizes, then add
0.4oz. for each foot
over 66 feet (40 g
for each meter over
20m). Write new total
charge on icemaker's
rating label.
Fig. 9
Bolt with Split Lock
Washer and Flat
Washer
Nut
Plate
Leg
Nut
22
5. Line Set Installation
WARNING
• R-404A itself is not ammable at atmospheric pressure and temperatures up to
176°F (80°C).
• R-404A itself is not explosive or poisonous. However, when exposed to high
temperatures (open ames), R-404A can be decomposed to form hydrouoric
acid and carbonyl uoride both of which are hazardous.
• Do not use silver alloy or copper alloy containing arsenic.
• Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the line set tubing through the service valve access ports (ifusing
an electronic leak detector), and then raise the pressure using nitrogen gas
(140PSIG). Do not use R-404A as a mixture with pressurized air for leak testing.
NOTICE
• Do not open any service valve until the line set installation is complete and leak
tested.
• Ensure that there are no traps and no kinks in the line set.
• Do not coil extra line set.
a) Line Set Up to 66' (20 m)
1) Route the factory line set or appropriate size copper tubing. When eld fabricating,
insulate the copper tubes separately. Leave a service loop behind the icemaker to allow
the icemaker to be pulled out for service. See Fig. 7.
Note: • The service loop is not considered an oil trap.
• The maximum line length for the standard line sizes and refrigerant charge is
66' (20 m). With larger line sizes and/or additional refrigerant, the maximum line
length is 100' (30.5 m). For details, see "II.G.4 Line Set Size and Refrigerant
Charge."
2) Remove any extra line set length, then insulate the two copper tubes separately.
3) Remove the Schrader valves from the icemaker service valves. Next, remove the
straight copper tube from the icemaker accessory bag and place it in the icemaker
liquid line service valve with the smaller end of the straight copper tube facing outward.
See Fig. 10. Note: The smaller diameter must be facing outward. Next, place the liquid
line copper tube into the straight copper tube.
Service Valve CapCondenser Unit Discharge Line
Service Valve
Access Valve Cap
Shrader Valve
Straight Copper Tube
Smaller Diameter End
Fig. 10
23
NOTICE
• Before brazing, remove the Schrader valve cores from the service valve access
ports.
• When brazing protect the service valve by using a wet cloth to prevent the service
valve from overheating.
• Braze all ttings while purging with a nitrogen gas owing at a pressure of 3 to 4
PSIG.
4) Braze the liquid line copper tube to the straight copper tube and the straight copper
tube to the icemaker liquid line service valve.
5) Braze the icemaker discharge line copper tube to the icemaker discharge line service
valve.
6) Remove the Schrader valves from the condenser unit service valves. Next, remove the
straight copper tube from the accessory bag and place it in the condenser unit liquid
line service valve with the smaller end of the straight copper tube facing outward. See
Fig. 10. Note: The smaller diameter must be facing outward. Next, place the liquid line
copper tube into the straight copper tube.
7) Braze the liquid line copper tube to the straight copper tube and the straight copper
tube to the condenser unit liquid line service valve.
8) Braze the condenser unit discharge line to the condenser unit discharge line service
valve.
9) Allow the service valves to cool, then replace the Schrader valve cores. Attach the
gauge manifold hoses.
10) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the line set tubing through the service valve access ports (if using an
electronic leak detector), and then raise the pressure using nitrogen gas (140 PSIG).
WARNING! Do not use R-404A as a mixture with pressurized air for leak testing.
11) After checking the line set for leaks, vent the nitrogen charge from the line set.
12) Evacuate the line set. Allow the vacuum pump to pull down to a 29.9" Hg vacuum.
Evacuating period depends on pump capacity.
13) After evacuation, charge each line set tube with R-404A vapor to a pressure of 15 to 30
PSIG.
14) Close both gauge manifold valves.
15) Open the icemaker service valves rst, then open the remote condenser unit service
valves.
16) Disconnect the gauge manifold hoses.
17) Replace all service valve caps and tighten.
18) Insulate all exposed tubing and ttings.
24
b) Line Set Greater Than 66' (20 m) Up to a Minimum of 100' (30.5 m)
1) Route the factory line set or appropriate size copper tubing. When eld fabricating,
insulate the copper tubes separately. Leave a service loop behind the icemaker to allow
the icemaker to be pulled out for service. See Fig. 7.
Note: • The service loop is not considered an oil trap.
• The maximum line length for the standard line sizes and refrigerant charge is 66' (20
m). With larger line sizes and/or additional refrigerant, the maximum line length is 100'
(30.5 m). For details, see "II.G.4 Line Set Size and Refrigerant Charge."
2) Remove any extra line set length, then insulate the two copper tubes separately.
3) Remove the Schrader valves from the icemaker service valves. Next, place the liquid
line copper tube into the liquid line service valve. Note: The straight copper tube in the
icemaker accessory bag is not used for line sets over 66' (20 m).
NOTICE
• Before brazing, remove the Schrader valve cores from the service valve access
ports.
• When brazing protect the service valve by using a wet cloth to prevent the service
valve from overheating.
• Braze all ttings while purging with a nitrogen gas owing at a pressure of 3 to 4
PSIG.
4) Braze the liquid line copper tube to the icemaker liquid line service valve.
5) Place the 3/8" end of a 1/2"×3/8" copper slip reducer (not provided) in the icemaker
discharge line service valve, then place the discharge line copper tube into the 1/2" end
of the 1/2"×3/8" copper slip reducer. See Fig. 11.
6) Braze the icemaker discharge line copper tube to the 1/2"×3/8" copper slip reducer and
the 1/2"×3/8" copper slip reducer to the icemaker discharge line service valve.
7) Remove the Schrader valves from the condenser unit service valves. Next, place the
liquid line copper tube into the liquid line service valve. Note: The straight copper tube in
the condenser unit accessory bag is not used for line sets over 66' (20 m).
8) Braze the liquid line copper tube to the condenser unit liquid line service valve.
9) Place the 3/8" end of a 1/2"×3/8" copper slip reducer (not provided) in the condenser
unit discharge line service valve, then place the discharge line copper tube into the 1/2"
end of the 1/2"×3/8" copper slip reducer. See Fig. 11.
Service Valve CapCondenser Unit Discharge Line
Service Valve
Access Valve Cap
Shrader Valve
1/2×3/8 Copper Reducer
1/2" Diameter End
Fig. 11
25
10) Braze the condenser unit discharge line copper tube to the 1/2"×3/8" copper slip
reducer and the 1/2"×3/8" copper slip reducer to the condenser unit discharge line
service valve.
11) Allow the service valves to cool, then replace the Schrader valve cores. Attach the
gauge manifold hoses.
12) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of
refrigerant to the line set tubing through the service valve access ports (if using an
electronic leak detector), and then raise the pressure using nitrogen gas (140 PSIG).
WARNING! Do not use R-404A as a mixture with pressurized air for leak testing.
13) After checking the line set for leaks, vent the nitrogen charge from the line set.
14) Evacuate the line set. Allow the vacuum pump to pull down to a 29.9" Hg vacuum.
Evacuating period depends on pump capacity.
15) After evacuation, add the appropriate amount of additional R-404A. See "II.G.4 Line Set
Size and Refrigerant Charge" for details.
Hoshizaki Technical Support is available at 1-800-233-1940 for recommendations.
16) Close both gauge manifold valves.
17) Open the icemaker service valves rst, then open the remote condenser unit service
valves.
18) Disconnect the gauge manifold hoses.
19) Replace all service valve caps and tighten.
20) Insulate all exposed tubing and ttings.
26
6. 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.
• To reduce the risk of electric shock, make all remote condenser unit connections
before connecting the icemaker power supply.
• THE REMOTE CONDENSER UNIT MUST BE GROUNDED. Install a ground wire
from the icemaker fan motor junction box to the remote condenser unit junction
box. Use wire of an appropriate gage and outdoor rating. Failure to properly
ground the remote condenser unit could result in death or serious injury.
• Install line and neutral wires from the fan motor leads in the icemaker fan motor
junction box to the leads in the remote condenser unit junction box. Use wire of an
appropriate gage and outdoor rating.
• Do not connect the fan motor leads in the icemaker to incoming power source. Do
not connect the fan motor leads in the icemaker together. Do not allow the leads
to contact the junction box walls.
• Do not connect the remote condenser unit to an external power source.
NOTICE
On remote models, the appliance must have power for a minimum of 4hours prior
to startup to prevent compressor damage.
• Usually an electrical permit and services of a licensed electrician are required.
• The opening for the power supply connection is 7/8" DIA to t a 1/2" trade size conduit.
1) Remove the remote condenser unit louver panel. See Fig. 12.
2) Remove the icemaker fan motor junction box cover. Remove the remote condenser unit
junction box cover.
Fig. 12
Icemaker
Screw
Fan Motor Junction
Box Cover
Screws
Louver Panel
Junction Box
Cover
Remote Condenser Unit
27
Fig. 13
3) Install a ground wire from the icemaker fan motor junction box to the remote condenser
unit junction box. Use wire of an appropriate gage and outdoor rating.
4) Install line and neutral wires from the fan motor leads in the icemaker fan motor junction
box to the leads in the remote condenser unit junction box. Use wire of an appropriate
gage and outdoor rating.
5) Replace the junction box covers and the louver panel in their correct positions.
7. Stacking Remote Condenser Unit
1) Install the lower remote condenser unit as described earlier in this section.
2) Place the upper remote condenser unit on top of the lower remote condenser unit.
See Fig. 13.
3) Secure the upper remote condenser unit to the lower remote condenser unit with the
4screws provided.
4) Install refrigerant lines and make electrical connection as described earlier in this
section.
Upper Remote
Condenser Unit
Screws
Screws
Lower Remote
Condenser Unit
28
H. Final Checklist
1. Pre-Startup
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, sides, and top of the icemaker?
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?
Has a proper ground been installed to the icemaker? On remote models, has a proper
ground also been installed to the remote condenser unit?
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 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) On remote models:
• Is the line set sized as specied, insulated, tightened, and free of leaks and kinks?
• If the line set exceeds 66' (20 m), has the line set size (if applicable) and charge been
adjusted as specied?
• Has the appliance power supply been on for a minimum of 4 hours?
• Is the remote condenser unit in a site where the ambient temperature is
within -20°F to +122°F (-29°C to +50°C) all year around?
• Is there at least 24" (61 cm) clearance around the remote condenser unit?
29
2. Post-Startup
1) Has the bin control been set to the proper setting for the application?
2) Has the bin control operation been conrmed?
3) Are all components, fasteners, and thumbscrews securely in place?
4) 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?
5) Has the end user been given the contact information of an authorized service agent?
6) Has the warranty registration been completed and submitted to the factory?
30
I. Startup
1. Bin Control Setting
An ultrasonic sensor is used as the bin control to control the level of ice in the dispenser
unit/ice storage bin. The bin control setting must be set to match the application to avoid
possible icemaker movement, water leakage, or ice overow.
WARNING
• Improper adjustment may adversely affect safety, performance, component life,
and warranty coverage.
• On dispenser unit applications, do not increase ice level above the recommended
setting listed below. Higher ice levels could result in icemaker movement, water
leakage, or ice overow.
NOTICE
Do not allow top kits or top kit risers (if applicable) to interfere with the bin control
lens sensing area or the icemaker will not operate properly.
1) Make sure the power supply is off. Remove the front, top, and right side panels to allow
access to the control board. Also, remove the base cover. See Fig. 14. Note: If front
access to the control box is required, remove the control box mounting screws, then
slide the control box forward and rotate the control box for access. See Fig. 15.
Icemaker
Base Cover
Disconnect This
End of Pump Tubing
to Drain Water Tank
Fig. 14
Control Switch
Mode Switch
Water Tank
Fig. 15
Control Box
Control Box
Mounting Screws
Control Box
2) Conrm the correct control board bin control setting required for your application and
adjust as detailed below.
Application Bin Control Setting Reference
Standard Ice Storage Bins (Factory Default) 1 See Fig. 16
Hoshizaki DB and DM Dispensers 2
Coca-Cola Freestyle
®
Dispensers 3
Non-Hoshizaki Dispensers Measurement Required See Fig. 17
Control Board
31
Fig. 16
Control Board
Recommended Setting for
Hoshizaki DB and DM Dispensers
Recommended Setting for Coca-Cola Freestyle®
Dispensers
Icemaker
Hoshizaki DB-200H
Dispenser Unit
Model Shown:
KM-520MAJ with DB-200H
Model Shown:
KM-660MAJ with B-300SF
Icemaker
Standard Ice
Storage Bin
Turn dial to adjust to proper setting
For Standard Ice Storage Bins, Hoshizaki DB and DM Dispenser Units, and Coca-Cola
Freestyle
®
Dispenser Units
Application Bin Control Ice Level Settings
Bin Control Setting
Shutdown Distance From Bin Control Lens
(Restart is 4 in. (102 mm) below shutdown distance)
Standard Ice Storage Bins 1
(Factory Default)
254 mm (10")
Do not adjust dispensers to this setting.
Hoshizaki DB and DM Dispensers 2 305 mm (12")
Coca-Cola Freestyle
®
Dispensers 3 406 mm (16")
Optional Setting 4 508 mm (20")
5 610 mm (24")
WARNING
Conrm that the nal ice level location does not allow for icemaker movement,
water leakage, or ice overow.
Factory Default for Standard
Ice Storage Bins
WARNING! Do not use this
setting with dispensers.
Bin Control
Lens
Setting #1
Setting #3
Setting #4
Setting #5
Setting #2
Bin Control
Lens
Setting #1
Setting #3
Setting #4
Setting #5
Setting #2
32
For Non-Hoshizaki Dispenser Units
Bin Control Ice Level Settings
Bin Control Setting
Shutdown Distance From Bin Control Lens
(Restart is 4 in. (102 mm) below shutdown distance)
1
(Factory Default)
Do not adjust dispensers to this setting. 254 mm (10")
2 305 mm (12")
3 406 mm (16")
4 508 mm (20")
5 610 mm (24")
WARNING
Conrm that the nal ice level location does not allow for icemaker movement,
water leakage, or ice overow.
NOTICE
The ice level must be lower than the top of the dispenser unit. Also, be sure the top
kit or top kit riser (if applicable) are clear from the bin control lens sensing area.
Fig. 17
Full Bin Measured Distance
(Shutdown Distance)
Measure from the bottom of
the compressor base (bin
control lens) to the preferred
full bin level of ice; refer to the
dispenser instruction manual.
Icemaker Restart Level
(4" (102 mm) below preferred
full bin level of ice)
Set Bin Control Setting at or Below Maximum Full
Bin Level of Ice (Shutdown Position) Shown Here
Top Kit
Icemaker
Non-Hoshizaki
Dispenser Unit
Bin Control Setting
Bin Control Lens
Control Board
Factory Default for Standard
Ice Storage Bins
WARNING! Do not use this
setting with dispensers.
Turn dial to adjust to setting
that matches Full Bin Measured
Distance (Shutdown Distance)
Bin Control
Lens
Setting #1
Setting #3
Setting #4
Setting #5
Setting #2
Maximum Full Bin Level of
Ice (Shutdown Position).
WARNING! Do not adjust
bin control setting above
this level.
33
2. Appliance Startup and Bin Control Check
WARNING
• All parts are factory-adjusted. Improper adjustments may adversely affect safety,
performance, component life, and warranty coverage.
• Make sure the icemaker has been installed as outlined in this manual and that
the water supply is on.
• Improper adjustment 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.
• To prevent damage to the water pump seal, do not leave the control switch in the
"PUMP" position for extended periods when the water tank is empty.
• At startup, conrm that all internal and external connections are free of leaks.
• Do not allow top kits or top kit risers (if applicable) to interfere with the bin control
lens sensing area or the icemaker will not operate properly.
Additional Notice for Remote Models
• The appliance must have power for a minimum of 4 hours prior to startup to
prevent compressor damage.
1) If not already removed, remove the front, top, and right side panels and base cover.
Make sure the bin control setting has been adjusted as outlined in "II.I.1. Bin Control
Setting."
2) Open the water supply line shut-off valve(s).
3) Move the mode switch on the control box to the "ICE" position, then move the control
switch to the "ON" position. Turn on the power supply, and allow the icemaker to operate.
4) Conrm the control board "BIN CLS"
LED is off (bin empty). See Fig. 18.
Ice Level in Bin Control Board "BIN CLS" LED
Empty OFF
Full ON
5) If the control board "BIN CLS" is on
(indicating a full bin), correct any
interference from the top kit or top kit
riser (if applicable).
Control Board
BIN CLS LED
Bin Control Setting
Fig. 18
34
6) 1 min. ll cycle begins. Place an object 5" to 7" (127 to 178mm) away from the bin
control lens. See Fig. 19. 15 sec. later, the icemaker shuts down. Remove the object
from the bin control lens. 30sec. later, the icemaker restarts.
For bin control shutdown times per cycle, see the table below.
Cycle at Bin
Control Activation Shutdown
1 min. Fill Cycle 15 sec. after activation.
Harvest Cycle If engaged 15 sec. or longer, at the end of harvest cycle.
Freeze Cycle 15 sec. after activation if activated at least 15 sec. before the 5-min. short cycle
protection timer terminates. Otherwise, at the end of the next harvest cycle.
7) Once the icemaker restarts, move the control switch to the "OFF" position, then turn off
the power supply.
8) If the control box was rotated, replace the control box in its correct position and secure
with the 2 control box mounting screws.
9) Replace the base cover, right side, top, and front panels in their correct positions.
10) Turn on the power supply, and allow the icemaker to operate for 10 min.
11) After 10 min., turn off the power supply, then remove the front panel.
12) Move the control switch to the "OFF"
position, then remove the base cover
and disconnect the rear pump tubing
connection to drain the water tank.
See Fig. 20.
13) After the water tank has drained, reconnect
the pump tubing.
14) Clean the dispenser unit/ice storage
bin liner using a neutral cleaner. Rinse
thoroughly after cleaning.
15) Replace the base cover in its correct position. Move the control switch to the "ON"
position. Replace all panels in their correct positions.
16) Turn on the power supply to start the automatic icemaking process.
17) On water-cooled models, conrm proper condenser drain outlet/return outlet
temperature as outlined in "II.F.2. Water-Cooled Condenser."
18) Return to "II.H.2. Post-Startup" and complete nal checklist.
Control Switch
Mode Switch
Water Tank
Base Cover
Disconnect This End
of Pump Tubing to
Drain Water Tank
Icemaker
Bin Control Lens
Compressor Base
Icemaker
Control Switch
Mode Switch
Fig. 19
Fig. 20
35
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 control switch or mode switch
with damp hands.
• Move the control 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.
• 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 dispenser unit/ice storage bin.
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.
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.
Underside of
Icemaker and Top
Kits; Bin Door and
Snout
Wipe down with a clean cloth and warmwater.
Yearly Icemaker and
Dispenser Unit/Ice
Storage Bin
Clean and sanitize per the cleaning and sanitizing instructions provided in
this manual. See "III.B. Cleaning and Sanitizing Instructions."
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.
36
B. Cleaning and Sanitizing Instructions
The icemaker 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 icemaker, 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.
• Do not leave the icemaker unattended when panels are off.
NOTICE
To prevent damage to the water pump seal, do not leave the control switch in the
"PUMP" position for extended periods when the water tank is empty.
Preparation
1) Remove the front panel, then move the control switch to the "OFF" position. Make sure
the mode switch is in the "ICE" position. After 3 minutes, move the control switch to the
"ON" position and replace the front panel.
2) Allow the appliance to run until the compressor energizes. Once the compressor
energizes, allow the appliance to run for an additional 3 minutes, then remove the front
panel. Move the control switch to the "OFF" position.
3) Remove all ice from the dispenser unit/ice storage bin. WARNING! If on a dispenser
unit, turn off the dispenser unit power supply after dispensing the ice.
Cleaning
4) Move the mode switch to the "CLEAN" position, then move the control switch to the
"ON" position (1 short beep occurs, then 3 seconds later 1 long beep occurs).
Replace the front panel. The water tank drains and then lls.
5) When the control board starts beeping (2 beep sequence), remove the front panel.
Move the control switch to the "OFF" position.
6) Remove the front insulation panel, then pour 10.4 . oz. (308 ml) of Hoshizaki "Scale
Away" into the water tank. Replace the front insulation panel.
7) Move the control switch to the "ON" position (1 short beep occurs, then 3 seconds later
1long beep occurs). Replace the front panel. To avoid excessive foaming in the water
tank, there is a 1minute delay before circulation begins. After approximately 30 minutes
of circulation, the icemaker performs 3 rinse cycles.
8) When the control board starts beeping (5 beep sequence), remove the front panel.
Move the control switch to the "OFF" position.
9) In bad or severe water conditions, turn off the power supply, then remove, clean
(cleaning solution = 5 oz. Hoshizaki "Scale Away" per gallon of warm water), rinse, and
replace the cube guide, oat switch, water supply tubes, spray tubes, and spray guides;
turn on the power supply when complete. Otherwise, continue to step 10.
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Sanitizing
10) Conrm the mode switch is in the "CLEAN" position, then move the control switch to the
"ON" position (1 short beep occurs, then 3 seconds later 1 long beep occurs).
Replace the front panel. The water tank drains and then lls.
11) When the control board starts beeping (2 beep sequence), remove the front panel.
Move the control switch to the "OFF" position.
12) Remove the front insulation panel, then pour 0.6 . oz. (18 ml) of an 8.25% sodium
hypochlorite solution (chlorine bleach) into the water tank. Replace the front insulation
panel.
IMPORTANT! Use regular bleach with no additives. Using a bleach with additives
causes excessive foaming during sanitizing, reducing the effectiveness of
sanitizing.
13) Move the control switch to the "ON" position (1 short beep occurs, then 3 seconds later
1long beep occurs). Replace the front panel. To avoid excessive foaming in the water
tank, there is a 1minute delay before circulation begins. After approximately 30 minutes
of circulation, the icemaker performs 3rinse cycles.
14) When the control board starts beeping (5 beep sequence), remove the front panel.
Move the control switch to the "OFF" position.
15) Clean the dispenser unit/ice storage bin liner using a neutral cleaner. Rinse thoroughly
after cleaning.
16) Move the mode switch to the "ICE" position, then move the control switch to the "ON"
position. Note: If on a dispenser unit, turn on the dispenser unit power supply.
17) Replace all panels in their correct positions.
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IV. Preparing the Appliance for Periods of Non-Use
NOTICE
• When storing the icemaker for an extended time or in sub-freezing temperatures,
follow the instructions below to prevent damage.
• To prevent damage to the water pump seal, do not leave the control switch in the
"PUMP" position for extended periods when the water tank is empty.
When the icemaker is not used for two or three days under normal conditions, it is
sufficient to move the control switch to the "OFF" position. When storing the icemaker for
an extended time or in sub-freezing temperatures, follow the instructions below.
1. Remove the water from the icemaker water supply line:
1) Turn off the power supply, then remove the front panel.
2) Move the control switch to the "OFF" position.
3) Close the icemaker water supply line shut-off valve, then open the icemaker water
supply line drain valve.
4) Allow the line to drain by gravity.
5) Attach a compressed air or carbon dioxide supply to the icemaker water supply line
drain valve.
6) Move the mode switch to the "ICE" position, then move the control switch to the "ON"
position.
7) Replace the front panel in its correct position, then turn on the power supply.
8) Blow the icemaker water supply line out using the compressed air or carbon dioxide
supply.
9) Close the icemaker water supply line drain valve.
2. Drain the water tank:
1) Turn off the power supply, then remove the front panel.
2) Move the control switch to the "OFF" position.
3) Remove the base cover, then disconnect one end of the pump tubing to drain the water
tank. See Fig. 21. After the water tank has drained, reconnect the pump tubing.
4) Remove all ice from the dispenser
unit/ice storage bin. Clean the
dispenser unit/ice storage bin liner
using a neutral cleaner. Rinse
thoroughly after cleaning.
5) Replace the base cover and the front
panel in their correct positions.
Control Switch
Mode Switch
Water Tank
Base Cover
Disconnect This End
of Pump Tubing to
Drain Water Tank
Icemaker
Fig. 21
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3. On water-cooled models, remove the water from the water-cooled condenser:
1) Make sure the power supply is off, then remove the front, top, and right 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.
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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.
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618 Hwy. 74 South, Peachtree City, GA 30269 USA (P) 770.487.2331 (F) 770.487.3360 hoshizakiamerica.com 1A6890-010
