Hoshizaki KM350MWJ, KM520MAJ, KM520MRJ, KM660MRJ User Manual

Instruction Manual

Modular Crescent Cuber

Models
KM-350MAJ, MWJ
KM-520MAJ, MWJ, MRJ
KM-660MAJ, MWJ, MRJ

hoshizakiamerica.com

Issued: 7-23-2018

WARNING

Only qualied service technicians should install and service the appliance. To
obtain the name and phone number of your local Hoshizaki Certied Service
Representative, visit www.hoshizaki.com. No installation or service should be
undertaken until the technician has thoroughly read this Instruction Manual.
Likewise, the owner/manager should not proceed to operate the appliance until the
installer has instructed them on its proper operation. Failure to install, operate, and
maintain the appliance in accordance with this manual will adversely affect safety,
performance, component life, and warranty coverage and may result in costly water
damage. Proper installation is the responsibility of the installer. Product failure or
property damage due to improper installation is not covered under warranty.

Hoshizaki provides this manual primarily to assist qualied service technicians in the
installation, maintenance, and service of the appliance.

Should the reader have any questions or concerns which have not been satisfactorily
addressed, please call, send an e-mail message, or write to the Hoshizaki Technical
Support Department for assistance.

Phone: [phone]
Fax: [phone]

E-mail: [e-mail]

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.

2

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. Specications ...................................................................................................................... 6

A. Electrical and Refrigerant Data ..................................................................................... 6

1. KM-350M_J .............................................................................................................. 6

2. KM-520M_J ............................................................................................................. 6

3. KM-660M_J ............................................................................................................. 7

B. Dimensions/Connections .............................................................................................. 8

1. Air-Cooled Models (MAJ) ......................................................................................... 8

2. Water-Cooled Models (MWJ) ................................................................................... 9

3. Remote Models (MRJ) ........................................................................................... 10

4. Remote Condenser Unit URC-5F (use with KM-520MRJ or KM-660MRJ) ............11

II. Installation and Operating Instructions ............................................................................ 12

A. Location ...................................................................................................................... 12

B. Checks Before Installation ........................................................................................... 13

C. How to Remove Panels ............................................................................................... 13

D. Setup ........................................................................................................................... 14

1. Dispenser Unit/Ice Storage Bin and Icemaker 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 ............................................................................................. 25

7. Stacking Remote Condenser Unit .......................................................................... 26

H. Final Checklist ............................................................................................................. 27

I. Startup .......................................................................................................................... 28

J. Bin Control Adjustment ................................................................................................ 30

III. Maintenance ................................................................................................................... 31

A. Maintenance Schedule ................................................................................................ 31

B. Cleaning and Sanitizing Instructions ........................................................................... 32

IV. Preparing the Appliance for Periods of Non-Use ............................................................ 34

V. Disposal ........................................................................................................................... 36

3

Important Safety Information

Throughout this manual, notices appear to bring your attention to situations which could
result in death, serious injury, damage to the appliance, or damage to property.

WARNING Indicates a hazardous situation which could result in death or

serious injury.

NOTICE Indicates a situation which could result in damage to the

appliance or property.

IMPORTANT Indicates important information about the installation, use, and

care of the appliance.

WARNING

The appliance should be destined only to the use for which it has been expressly
conceived. Any other use should be considered improper and therefore dangerous.
The manufacturer cannot be held responsible for injury or damage resulting
from improper, incorrect, and unreasonable use. Failure to install, operate, and
maintain the appliance in accordance with this manual will adversely affect safety,
performance, component life, and warranty coverage and may result in costly water
damage.

To reduce the risk of death, electric shock, serious injury, or re, follow basic
precautions including the following:

• Only qualied service technicians should install and service the appliance.

• The appliance must be installed in accordance with applicable national, state, and
local codes and regulations.

• 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 specications. Failure to use an independent power supply
of proper capacity can result in a tripped breaker, blown fuse, damage to existing
wiring, or component failure. This could lead to heat generation or re.

• THE 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.

4

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.

5

I. Specications

A. Electrical and Refrigerant Data

The rating label and nameplate provide electrical and refrigerant data. The rating label
can be seen by removing the front panel. The nameplate is located on the rear panel. For
certication marks, see the nameplate.
We reserve the right to make changes in specications and design without prior notice.

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)
Max. Circuit Breaker
(Canada Only)
Minimum Circuit
Ampacity
Design Pressure HI-467PSI LO-250PSI HI-427PSI LO-250PSI
Refrigerant 404A 1 LB. 3.4 OZ. 404A 11.6 OZ.

15 AMPS 15 AMPS

15 AMPS 15 AMPS

15 AMPS 15 AMPS

2. KM-520M_J

Single Phase

Model Number KM-520MAJ KM-520MWJ KM-520MRJ

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)
Max. Circuit Breaker
(Canada Only)
Minimum Circuit
Ampacity
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

20 AMPS 20 AMPS 20 AMPS

20 AMPS 20 AMPS 20 AMPS

20 AMPS 20 AMPS 20 AMPS

Total Refrigerant Charge with
Hoshizaki Remote Condenser
Unit URC-5F: 4 LB. 2.7 OZ.

6

3. KM-660M_J

Single Phase

Model Number KM-660MAJ KM-660WJ KM-660MRJ

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)
Max. Circuit Breaker
(Canada Only)
Minimum Circuit
Ampacity
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

20 AMPS 20 AMPS 20 AMPS

20 AMPS 20 AMPS 20 AMPS

20 AMPS 20 AMPS 20 AMPS

Total Refrigerant Charge
with Hoshizaki Remote
Condenser Unit URC-5F:
R404A 4 LB. 2.7 OZ.

7

B. Dimensions/Connections

1. Air-Cooled Models (MAJ)

Units: mm [in.]

Side

Rear

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.

8

2. Water-Cooled Models (MWJ)

Units: mm [in.]

Side

Rear

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

3. Remote Models (MRJ)

Units: mm [in.]

Side

Rear

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.

10

4. Remote Condenser Unit URC-5F (use with KM-520MRJ or KM-660MRJ)

NOTICE

Allow 24" (61cm) clearance at front
and rear for proper air circulation and
ease of maintenance and/or service
should they be required.

URC-5F Heat of Rejection
Icemaker
Model

KM-520MRJ 6,200 BTU/h
KM-660MRJ 8,100BTY/h

AT 90°F (32°C)

WT 70°F (21°C)

Top

Rear

Units: mm [in.]

11

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.

12

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 specied 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-520M_J
KM-660M_J

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 specic application. For further
details, contact your local Hoshizaki distributor.

Model Number Recommended Hoshizaki Remote Condenser Unit

KM-520MRJ
KM-660MRJ

C. How to Remove Panels

See Fig. 1

• Front Panel: Remove the screw. Lift up and

URC-5F

Front Insulation Panel

Front
Panel

Top Panel

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

Model Shown: KM-520MAJ

Fig. 1

Screw
Right Side Panel

• Base Cover: Lift up slightly and pull towards you.

13

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.

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. Ifusing 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. SeeFig.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.

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
2mounting brackets and the bolts provided. See Fig.2b.

Icemaker

Mounting
Brackets

Bolts

Fig. 2a

Self-Tapping
Screws
(Not Provided)

Icemaker

Dispenser
Unit

Fig. 2b

Ice
Storage
Bin

Bolts

Mounting
Brackets

14

E. Electrical Connection

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

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 specications. Failure to use an independent power
supply of proper capacity can result in a tripped breaker, blown fuse, damage to
existing wiring, or component failure. This could lead to heat generation or re.

• THE 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.

On remote models, the appliance must have power for a minimum of 4hours 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.

NOTICE

KM-350M_J
KM-520M_J
KM-660M_J

Fig. 3

15

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
113PSIG. 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 Certied 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
2vertical 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
(ifapplicable) and the oor drain.

16

1. Icemaker

Icemaker Water
Supply Inlet

1/2" Female Pipe
Thread (FPT)

Minimum Icemaker
Water Supply Line Size

1/4" Nominal ID
Copper Water Tubing or
Equivalent

Icemaker Drain
Outlet

3/4" Female Pipe
Thread (FPT)

Minimum Icemaker
Drain Line Size

3/4" Nominal
ID Hard Pipe or
Equivalent

Condensation
Drain Outlet

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.

Minimum 1/4" Nominal ID Copper
Water Tubing or Equivalent

Icemaker
Water Supply
Inlet
1/2" FPT

Shut-Off Valve

Drain Valve

Icemaker
Drain Outlet
3/4" FPT

Icemaker
Condensation
Drain Outlet
3/8" OD Hard Tube

Bin Drain Outlet
3/4" FPT

Vent Tube

Minimum 3/4" Nominal ID
Hard Pipe 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.

Fig. 4

Model Shown:
KM-520MRJ

Air-Cooled and Remote Models

17

2" (5 cm) air gap

Floor

Drain

2. Water-Cooled Condenser

a) Connection to an Open Drain System

Condenser Water
Supply Inlet

1/2" Female Pipe
Thread (FPT)

Minimum Condenser
Water Supply Line Size

1/4" Nominal ID Copper
Water Tubing or Equivalent

Condenser Drain
Outlet

3/8" Female Pipe
Thread (FPT)

Minimum Condenser
Drain Line Size

1/4" Nominal ID Hard Pipe
or Equivalent

• A condenser water supply line shut-off valve and drain valve must be installed.

• In some areas, a back ow preventer may be required in the cooling water circuit.

• In order to maintain the proper high side pressure, the condenser water supply inlet
temperature should not drop below 45°F (7°C) and the condenser drain outlet temperature
must be in the 104°F to 115°F (40°C to 46°C) range. Once the icemaker installation
is complete, conrm the condenser drain outlet temperature 5 minutes after a freeze
cycle starts. If the condenser drain outlet temperature is not in the proper range, use a
at blade screwdriver to rotate the adjustment screw on the water-regulating valve until
the temperature is in the proper range (rotate counterclockwise to raise temperature or
clockwise to lower temperature).

Icemaker Water
Supply Inlet
1/2" FPT

Condenser Water
Supply Inlet
1/2" FPT

Icemaker

Vent Tube

Shut-Off Valve

Condenser
Drain Outlet
3/8" FPT

Icemaker
Drain Outlet
3/4" FPT

Bin Drain Outlet
3/4" FPT

Minimum 1/4" Nominal ID
Hard Pipe or Equivalent

Minimum 3/4" Nominal ID
Hard Pipe or Equivalent

Fig. 5

Model Shown:
KM-520MWJ

Minimum 1/4" Nominal ID Copper
Water Tubing or Equivalent

Drain Valve

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.

Ice
Storage
Bin

Icemaker
Condensation
Drain Outlet
3/8" OD Hard Tube

Vent Tube

Water-Cooled Models

Connection to an Open Drain System

2" (5 cm) air gap

Floor Drain

18

b) Connection to a Closed Loop System

Condenser Water
Supply Inlet

1/2" Female Pipe
Thread (FPT)

Minimum Condenser
Water Supply Line Size

1/4" Nominal ID Copper
Water Tubing or Equivalent

Condenser
Return Outlet

3/8" Female Pipe
Thread (FPT)

Minimum Condenser
Return Line Size

1/4" Nominal ID Copper
Water Tubing or Equivalent

• Shut-off valves and drain valves must be installed at both the condenser water supply inlet
and condenser return outlet.

• Minimum water ow to the condenser is 4 GPM.

• The pressure differential between the condenser water supply inlet and condenser return
outlet must be no less than 10 PSIG.

• When using a glycol blend, the solution mixture should be less than 30% glycol.

• In order to maintain the proper high side pressure, the condenser water supply inlet
temperature should not drop below 45°F (7°C) and the condenser return outlet
temperature must be in the 104°F to 115°F (40°C to 46°C) range. Once the icemaker
installation is complete, conrm the condenser return outlet temperature 5 minutes after a
freeze cycle starts. If the condenser return outlet temperature is not in the proper range,
use a at blade screwdriver to rotate the adjustment screw on the water-regulating valve
until the temperature is in the proper range (rotate counterclockwise to raise temperature
or clockwise to lower temperature).

Icemaker Water
Supply Inlet
1/2" FPT

Condenser Water
Supply Inlet
1/2" FPT

Condenser
Return Outlet
3/8" FPT

Icemaker
Condensation
Drain Outlet
3/8" OD Hard Tube

Icemaker

Minimum 1/4" Nominal ID Copper
Water Tubing or Equivalent

Shut-Off Valve

Minimum 1/4" Nominal ID Copper
Water Tubing or Equivalent

Icemaker
Drain Outlet
3/4" FPT

Bin Drain Outlet
3/4" FPT

Minimum 3/4" Nominal ID
Hard Pipe or Equivalent

Fig. 6

Model Shown:
KM-660MWJ

Connection to a Closed Loop System

Ice
Storage
Bin

Water-Cooled Models

19

Vent Tube

Drain Valve

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

G. Installation of Remote Condenser Unit for Remote Models

WARNING

• Installation of remote condenser unit must be performed by properly trained and
EPA-certied 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" (61cm) clearance at front and rear for proper air
circulation and ease of maintenance and/or service should they be required. See Fig. 8.

Icemaker

Min. 24" (61 cm) Clearance

Air Air

Max.
33'
(10 m)

Remote
Condenser
Unit

Icemaker

Max.
10'
(3 m)

Service Loop

Fig. 7

Service Loop

Remote
Condenser
Unit

20

Fig. 8

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

Plate

Nut

bolts and nuts provided. Repeat on the other side
with the remaining set of legs.

Leg

3) The bottom of each leg has a mounting hole.
Secure the legs to the permanent site with 4 bolts
(not included).

Fig. 9

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

Line Set

Hoshizaki
Icemaker

KM-520MRJ
KM-660MRJ

Hoshizaki
Remote
Condenser
Unit

URC-5F 1/4" OD3/8" OD Not

Line Set
Up to 66' (20 m)
Liquid
Line

Discharge
Line

Charge
Adjustment

Applicable

Greater than 66' (20 m)
Maximum 100' (30.5 m)
Liquid
Line

3/8" OD1/2" OD Add 16.5 oz. (468g)

Discharge
Line

Charge Adjustment
(R-404A)

to compensate for
larger diameter line
sizes, then add

0.4oz. for each foot
over 66 feet (40 g
for each meter over
20m). Write new total
charge on icemaker's
rating label.

Nut

Bolt with Split
Lock Washer and
Flat Washer

21

5. Line Set Installation

Precharged factory line sets, available as optional equipment from Hoshizaki America,
are recommended. For details, see "II.G.5.a) Factory Line Set Installation." Field
fabricated line sets are allowed. For details, see "II.G.5.b) Field Fabricated Line Set
Installation."

a) Factory Line Set Installation

1) Route the factory line set (see "II.G.4 Line Set Size and Refrigerant Charge" for
details) from the remote condenser unit to the icemaker. Leave a service loop behind
the icemaker to allow the icemaker to be pulled out for service. See Fig. 10. Factory
fabricated line sets are precharged and do not need to be evacuated. If the line set is
too long or too short, see "II.G.5.a)(1) Factory Line Set Modication."

NOTICE

• Ensure that there are no traps and no kinks in the line set. The service loop is not
considered an oil trap.

• Do not coil extra line set.

2) Connect the refrigerant lines to the appropriate male ttings on the remote condenser
unit rst and then at the icemaker. Make a proper connection as follows:

a. Remove the protective covers from the male tting and female coupling.
b. Apply Polyol Ester (POE) refrigerant oil or Parker Super O Lube to the entire male

tting, including O-ring, diaphragm, and threads before making the connection.
SeeFig. 11. NOTICE! Do not use thread sealant on the ttings. Use POE

refrigerant oil or Parker Super O Lube only. Couplings are one-time use only.

c. Make sure the male tting and female coupling are properly aligned, then start the

connection by hand to ensure that it is not cross threaded.

d. Place a backup wrench on the back of the female coupling, then tighten the

connection with a wrench until it is tight. At this point, the nut has covered most of
the threads on the male tting. NOTICE! Failure to use a backup wrench may

result in damage to the line set and possible refrigerant leaks.

e. Mark a reference line on the female coupling and the remote condenser unit or

icemaker panel. Using a backup wrench on the back of the female coupling, tighten
the six-sided nut of the female coupling an additional 1/6 turn. See Fig. 12.

NOTICE! Conrm connection is free of leaks.

3) If you lengthened the line set as outlined in "II.G.5.a)(1) Factory Line Set Modication"
and it exceeds 66' (20 m), see "II.G.4. Line Set Size and Refrigerant Charge" for proper
charging of the appliance.

22

(1) Factory Line Set Modication

1) Recover the line set charge through the Schrader access ports on the Parker quick
connect couplings and store it in an approved container. Do not discharge the
refrigerant into the atmosphere. Remove the extra line set length or add extra tubing.
When adding extra tubing, insulate the additional copper tubes separately.

2) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace
of refrigerant to the lines through the Schrader access ports on the Parker quick
connect couplings (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.

3) Evacuate through the Schrader access ports on the Parker quick connect couplings and
charge with R-404A refrigerant vapor to a pressure of 15 to 30 PSIG. Go to step 2 in
"II.G.5.a) Factory Line Set Installation."

b) Field Fabricated Line Set Installation

1) Route the copper tube liquid line and copper tube discharge line (see "II.G.4 Line
Set Size and Refrigerant Charge" for details) from the remote condenser unit to the
icemaker. Leave a service loop behind the icemaker to allow the icemaker to be pulled
out for service. See Fig. 11.

NOTICE

• Ensure that there are no traps and no kinks in the line set. The service loop is not

considered an oil trap.

• Do not coil extra line set. Fabricate the line set to the proper length.

2) Insulate the two copper tubes separately.

3) Install Parker quick connect couplings on each end. OS-QUICK, a universal quick
connect coupling kit available as optional equipment from Hoshizaki America, is
recommended. NOTICE! Before brazing, remove the Schrader valve core from the

access port. When brazing, protect the coupling by using a wet cloth to prevent
the coupling from overheating. Do not use silver alloy or copper alloy containing
arsenic.

4) Allow the coupling to cool, then replace the Schrader valve core.

5) Use an electronic leak detector or soap bubbles to check for leaks. Add a trace
of refrigerant to the lines through the Schrader access ports on the Parker quick
connect couplings (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.

6) Evacuate through the Schrader access ports on the Parker quick connect couplings and
charge with R-404A refrigerant vapor to a pressure of 15 to 30 PSIG.

23

7) Connect the refrigerant lines to the appropriate male ttings on the remote condenser
unit rst and then at the icemaker. Make a proper connection as follows:

a. Remove the protective covers from the male tting and female coupling.
b. Apply Polyol Ester (POE) refrigerant oil or Parker Super O Lube to the entire male

tting, including O-ring, diaphragm, and threads, before making the connection.
SeeFig. 12. NOTICE! Do not use thread sealant on the ttings. Use POE

refrigerant oil or Parker Super O Lube only. Couplings are one-time use only.

c. Make sure the male tting and female coupling are properly aligned, then start the

connection by hand to ensure that it is not cross threaded.

d. Place a backup wrench on the back of the female coupling, then tighten the

connection with a wrench until it is tight. At this point, the nut has covered most of
the threads on the male tting. NOTICE! Failure to use a backup wrench may

result in damage to the line set and possible refrigerant leaks.

e. Mark a reference line on the female coupling and the remote condenser unit or

icemaker panel. Using a backup wrench on the back of the female coupling, tighten
the six-sided nut of the female coupling an additional 1/6 turn. See Fig. 12.

NOTICE! Conrm connection is free of leaks.

8) If the line set exceeds 66' (20 m), see "II.G.4. Line Set Size and Refrigerant Charge" for
proper charging of the appliance.

Fig. 10

Fig. 11

Fig. 12

Remote Condenser Unit

Male Fitting

Brush

Threads

Reference
Line

Diaphragm

O-Ring

Wrench

Male Fitting

Female Coupling

Discharge Line (Insulated)
See "II.G.4 Line Set Size and
Refrigerant Charge" for details.

Liquid Line (Insulated)
See "II.G.4 Line Set Size and
Refrigerant Charge" for details.

Apply POE Oil or
Parker Super O Lube
to Entire Male Fitting

After Tight, Tighten an
Additional 1/6 Turn

Icemaker

Service Loop

DO NOT USE

THREAD SEALANT

1/6
Tu r n

Backup
Wrench

24

Backup
Wrench

Wrench

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 4hours 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. 13.

2) Remove the icemaker fan motor junction box cover. Remove the remote condenser unit
junction box cover.

Remote Condenser Unit

Screws

Junction Box
Cover

Louver Panel

Fan Motor Junction
Box Cover

Icemaker

Fig. 13

25

Screw

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. 14.

3) Secure the upper remote condenser unit to the lower remote condenser unit with the
4screws 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

Fig. 14

26

H. Final Checklist

WARNING

CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews

are securely in place after installation. Make sure that none have fallen into the
dispenser unit/ice storage bin.

1) Is the icemaker level?

2) Is the icemaker in a site where the ambient temperature is within 45°F to 100°F (7°C to
38°C) and the water temperature within 45°F to 90°F (7°C to 32°C) all year around?

3) Is there at least 6" (15 cm) clearance at rear, 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 specied? Are the water supply line
shut-off valve(s) and drain valve(s) installed? Has the water supply pressure been
checked to ensure a minimum of 10 PSIG and a maximum of 113 PSIG?

8) Is the compressor snug on all mounting pads? Have the refrigerant lines been checked
to make sure they do not rub or touch other lines or surfaces? Has the fan blade
(if applicable) been checked to make sure it turns freely?

9) On remote models:

• Is the line set sized as specied, 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 specied?

• 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?

10) Are all components, fasteners, and thumbscrews securely in place?

11) Has the end user been given the instruction manual, and instructed on how to operate
the appliance and the importance of the recommended periodic maintenance?

12) Has the end user been given the contact information of an authorized service agent?

13) Has the warranty registration been completed and submitted to the factory?

27

I. Startup

WARNING

All parts are factory-adjusted. Improper adjustments may adversely affect safety,
performance, component life, and warranty coverage.

NOTICE

• If the icemaker is turned off, wait for at least 3 minutes before restarting the
icemaker to prevent damage to the compressor.

• 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, conrm that all internal and external connections are free of leaks.

Additional Notice for Remote Models

• The icemaker must have power for a minimum of 4hours prior to startup to
prevent compressor damage.

1) Open the water supply line shut-off valve(s).

2) Remove the front panel and base cover. See Fig. 15. If using in a dispenser application,
see "II.J. Bin Control Adjustment." Otherwise, continue to step 3.

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.

Base Cover

Fig. 15

28

4) As water begins to ll the water tank (1-min. ll),
place an object 5" to 7" (127 to 178mm) away
from the bin control lens. See Fig. 16. 15 sec. later,
the icemaker shuts down. Remove the object from
the bin control lens. 30 sec. later, the icemaker
restarts.

Bin Control Lens

Fig. 16

Cycle at Bin
Control Activation

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

Ice Level in Bin Control Board

Empty OFF ON

Full ON OFF

Shutdown

protection timer terminates. Otherwise, at the end of the next harvest cycle.

Bin Control Controller

"OPEN/CLOSED" LED

LED 1

5) Once the icemaker restarts, move the control switch to the "OFF" position, then turn off
the power supply.

6) Replace the base cover in its correct position.

7) Move the control switch to the "ON" position. Replace the front panel in its correct
position, then turn on the power supply.

8) Allow the icemaker to operate for 10 min.

9) After 10 min., turn off the power supply, then remove the front panel.

10) Move the control switch to the "OFF" position, then remove the base cover and
disconnect one end of the pump tubing to drain the water tank. See Fig. 17.

11) After the water tank has drained, reconnect the pump tubing.

12) Clean the dispenser unit/ice storage bin liner using a neutral cleaner. Rinse thoroughly
after cleaning.

13) Replace the base cover in its correct position. Move the control switch to the "ON"
position. Replace the front panel in its correct position.

14) Turn on the power supply to start the
automatic icemaking process.

15) On water-cooled models, conrm
proper condenser drain outlet/return

Disconnect This
End of Pump
Tubing to Drain
Water Tank

outlet temperature as outlined in "II.F.2.
Water-Cooled Condenser."

Base Cover

Fig. 17

29

J. Bin Control Adjustment

WARNING

• All parts are factory-adjusted. Improper adjustments may adversely affect safety,
performance, component life, and warranty coverage.

• In Hoshizaki DB and DM dispenser applications, the bin control controller setting
must be adjusted to 2. For Coca-Cola Freestyle® dispenser and non-Hoshizaki
dispenser applications, the bin control controller setting must be adjusted to 3.
Increasing the ice level on any dispenser application could lead to icemaker
movement, water leakage, or ice overow.

NOTICE

• Do not block the bin control lens with top kits or the icemaker will not operate
properly.

• Failure to properly adjust the bin control setting could result in water leakage, ice
backup, and icemaker damage.

The bin control is factory set to 1 for use on Hoshizaki America standard ice storage bins.
See the table below for adjustments to ice level.

WARNING! Do not increase ice level above the settings listed below. Higher ice
levels could lead to icemaker movement, water leakage, or ice overow.

1) If not already removed, remove the front, top, and right side panels.

2) Conrm bin control controller setting for proper application. See the table below for
settings. See Fig. 18 for ice level reference. Return to step 3 in "I. Startup."

Application Bin Control Ice Level Settings

Bin Control Controller

Setting
Default: Standard Ice Storage Bins 1 254 mm (10")
Hoshizaki DB and DM Dispensers 2 305 mm (12")

®

Coca-Cola Freestyle
non-Hoshizaki Dispensers

Optional Settings 4 508 mm (20")

Recommended Setting for
Hoshizaki DB or DM Dispenser

Factory Default for
Standard Ice Storage Bins

Dispenser and

Recommended Setting for
Coca-Cola Freestyle® Dispenser

and Non-Hoshizaki Dispensers

3 406 mm (16")

5 610 mm (24")

Ice Detection Distance From
Bin Control Lens

Bin Control
Lens

Setting #1
Setting #2
Setting #3
Setting #4
Setting #5

Bin Control
Controller

Model Shown:
KM-660MAJ-E with B-300SF

Fig. 18

30

III. Maintenance

The appliance must be maintained in accordance with the instruction manual and labels
provided. Consult with your local Hoshizaki Certied Service Representative about
maintenance service.

WARNING

• Only qualied 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
Icemaker Exterior Wipe down with a clean, soft cloth. Use a damp cloth containing a neutral

Underside of
Icemaker and Top
Kits; Bin Door and
Snout

Yearly Icemaker and

Dispenser Unit/Ice
Storage Bin

Water Supply Inlet Close the icemaker water supply line shut-off valve and drain the water

Condenser Inspect. Clean if necessary by using a brush or vacuum cleaner. More

Water Hoses Inspect the water hoses and clean/replace if necessary.

Check for proper pressure and change if necessary.

cleaner to wipe off oil or dirt build up. Clean any chlorine staining (rust
colored spots) using a non-abrasive cleanser.

Wipe down with a clean cloth and warmwater.

Clean and sanitize per the cleaning and sanitizing instructions provided in
this manual. See "III.B. Cleaning and Sanitizing Instructions."

system. Clean the water supply inlet screen.

frequent cleaning may be required depending on location.

31

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
1long beep occurs). Replace the front panel. To avoid excessive foaming in the water
tank, there is a 1minute 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.

32

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.

Sanitizing

10) Conrm 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
1long beep occurs). Replace the front panel. To avoid excessive foaming in the water
tank, there is a 1minute delay before circulation begins. After approximately 30 minutes
of circulation, the icemaker performs 3rinse 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.

33

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. 17. 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.

34

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 certied 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 1A4658-010

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