Hoshizaki MRH, MWH KML-351MAH, MWH KML-631MAH, KML-250MAH, MWH User Manual

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Hoshizaki America, Inc.

Hoshizaki

Low-Profile Modular Crescent Cuber

Models KML-250MAH, MWH

“A Superior Degree

of Reliability”

www.hoshizaki.com

KML-351MAH, MWH KML-451MAH, MWH KML-631MAH, MWH, MRH

INSTRUCTION MANUAL

Issued: 8-19-2013

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: 1-800-233-1940; (770) 487-2331 Fax: 1-800-843-1056; (770) 487-3360

E-mail: techsupport@hoshizaki.com

HOSHIZAKI AMERICA, INC. 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.

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. KML-250M_H ........................................................................................................... 6

2. KML-351M_H ........................................................................................................... 6

3. KML-451M_H ........................................................................................................... 7

4. KML-631M_H ........................................................................................................... 7

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

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

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

3. Remote Models (MRH) .......................................................................................... 10

4. Remote Condenser Unit URC-9F (use with KML-631MRH) ...................................11

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

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

B. Checks Before Installation ........................................................................................... 12

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

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

E. Electrical Connection .................................................................................................. 16

F. Water Supply and Drain Connections .......................................................................... 18

1. Icemaker ................................................................................................................ 19

2. Water-Cooled Condenser....................................................................................... 20

a) KML-250/351/451MWH ...................................................................................... 20

b) KML-631MWH .................................................................................................... 22

G. Installation of Remote Condenser Unit ....................................................................... 24

1. Location ................................................................................................................. 24

2. Checks Before Installation ..................................................................................... 25

3. Setup ..................................................................................................................... 25

4. Line Set Size and Refrigerant Charge ................................................................... 25

5. Line Set Installation ............................................................................................... 26

6. Electrical Connection ............................................................................................. 29

7. Stacking Remote Condenser Unit .......................................................................... 30

H. Final Checklist ............................................................................................................. 31

I. Startup .......................................................................................................................... 32

III. Maintenance ................................................................................................................... 33

A. Maintenance Schedule ................................................................................................ 33

B. Cleaning and Sanitizing Instructions ........................................................................... 34

1. Cleaning Procedure ................................................................................................ 34

2. Sanitizing Procedure - Following Cleaning Procedure ........................................... 35

IV. Preparing the Icemaker for Periods of Non-Use ............................................................. 37

V. Disposal ........................................................................................................................... 39

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 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.

• To reduce the risk of electric shock, do not touch the control switch or service 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.

• 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.

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 icemaker in a location that stays above freezing. Normal operating

ambient temperature must be within 45°F to 100°F (7°C to 38°C).

• Do not leave the icemaker on during extended periods of non-use, extended

absences, or in sub-freezing temperatures. To properly prepare the icemaker for

these occasions, follow the instructions in "IV. Preparing the Icemaker 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.

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. KML-250M_H

Model Number KML-250AH KML-250MWH

AC Supply Voltage 115/60/1 115/60/1 Compressor 115V 7.0RLA 33.6LRA 115V 6.7RLA 33.6LRA Pump 120V 0.5FLA 23W 120V 0.5FLA 23W Fan 115V 1.2FLA 25W --- --- --Other 115-120V 0.2A 115-120V 0.2A Maximum Fuse Size 20 AMPS 20 AMPS Max. HACR Breaker (USA Only) Max. Circuit Breaker (Canada Only) Minimum Circuit Ampacity Design Pressure HI-467PSI LO-230PSI HI-427PSI LO-230PSI Refrigerant 404A 1 LB. 2 OZ. 404A 14.1 OZ.

20 AMPS 20 AMPS

2. KML-351M_H

Model Number KML-351MAH KML-351MWH

AC Supply Voltage 115/60/1 115/60/1 Compressor 115V 6.1RLA 50LRA 115V 6.7RLA 33.6LRA Pump 120V 0.5FLA 23W 120V 0.5FLA 23W Fan 115V 0.85FLA 50W --- --- --Other 115-120V 0.2A 115-120V 0.2A Maximum Fuse Size 20 AMPS 20 AMPS Max. HACR Breaker (USA Only) Max. Circuit Breaker (Canada Only) Minimum Circuit Ampacity Design Pressure HI-467PSI LO-230PSI HI-427PSI LO-230PSI Refrigerant 404A 1 LB. 9.4 OZ. 404A 1 LB. 1.6 OZ.

20 AMPS 20 AMPS

3. KML-451M_H

Model Number KML-451MAH KML-451MWH

AC Supply Voltage 115/60/1 115/60/1 Compressor 115-120V 7.9RLA 54.5LRA 115-120V 9.0RLA 70LRA Pump 120V 0.5FLA 23W 120V 0.5FLA 23W Fan 120V 0.85FLA 50W --- --- --Other 115-120V 0.15A 115-120V 0.15A Maximum Fuse Size 20 AMPS 20 AMPS Max. HACR Breaker (USA Only) Max. Circuit Breaker (Canada Only) Minimum Circuit Ampacity Design Pressure HI-467PSI LO-230PSI HI-427PSI LO-230PSI Refrigerant 404A 1 LB. 8.7 OZ. 404A 15.2 OZ.

20 AMPS 20 AMPS

4. KML-631M_H

Model Number KML-631MAH KML-631MWH KML-631MRH

AC Supply Voltage 208-230/60/1 (3 Wire with

Neutral) Compressor 208-230V 6.9RLA 46LRA 208-230V 6.8RLA 46LRA 208-230V 6.4RLA 46LRA Pump 120V 0.5FLA 23W 120V 0.5FLA 23W 120V 0.5FLA 23W Fan 120V 0.85FLA 50W --- --- --- 120V 3A MAX (Fan in URC) Other 115-120V 0.15A 115-120V 0.15A 115-120V 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-230PSI HI-427PSI LO-230PSI HI-467PSI LO-230PSI Refrigerant 404A 2 LB. 10.3 OZ. 404A 1 LB. 6.0 OZ. 404A

20 AMPS 20 AMPS 20 AMPS

208-230/60/1 (3 Wire with Neutral)

Total Refrigerant Charge with Hoshizaki Remote Condenser Unit URC-9F: 11 LB. 7.4 OZ.

B. Dimensions/Connections

1. Air-Cooled Models (MAH)

Model Shown: KML-451MAH

KML-250MAH KML-351MAH

KML-451MAH A 559 [22] 659 [26] B 515 [20-1/4] 615 [24-1/4] C 505 [19-7/8] 605 [23-7/8]

Side

KML-631MAH

Units: mm [in.]

Rear

Model Shown: KML-451MAH

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 ice storage bin opening must

match the bottom opening as in the illustration.

Model Shown: KML-451MAH

2. Water-Cooled Models (MWH)

Model Shown: KML-451MWH

KML-250MWH KML-351MWH

KML-451MWH A 559 [22] 659 [26] B 515 [20-1/4] 615 [24-1/4] C 505 [19-7/8] 605 [23-7/8] D 403 [15-7/8] 504 [19-7/8] E 55 [2-1/8] -

Side

KML-631MWH

Units: mm [in.]

Rear

KML-250/351/451/MWH

Model Shown: KML-451MWH

Rear

KML-631MWH

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 ice storage bin opening must

match the bottom opening as in the illustration.

Model Shown: KML-631MWH

Bottom

Model Shown: KML-451MWH

3. Remote Models (MRH)

Units: mm [in.]

Side

Model Shown: KML-631MRH

KML-631MRH A 659 [26] B 615 [24-1/4] C 605 [23-7/8] D 448 [17-5/8]

E 41 [1-5/8] F 63 [2-1/2]

G 75 [3]

Rear

Model Shown: KML-631MRH

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 ice storage bin opening must

match the bottom opening as in the illustration.

Model Shown: KML-631MRH

4. Remote Condenser Unit URC-9F (use with KML-631MRH)

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-9F Heat of Rejection Icemaker Model

KML-631MRH 10,300 BTU/hr

AT 90°F (32°C)

WT 70°F (21°C)

Top

Rear

Units: mm [in.]

II. Installation and Operating Instructions

WARNING

• The appliance must be installed in accordance with applicable national, state, and

local codes and regulations.

• Failure to install, operate, and maintain the appliance in accordance with this

manual will adversely affect safety, performance, component life, and warranty coverage and may result in costly water damage.

• CHOKING HAZARD: Ensure all components, fasteners, and thumbscrews are securely in place after installation. Make sure that none have fallen into the 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 Icemaker 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 appliance.

B. Checks Before Installation

• Visually inspect the exterior of the shipping container and immediately report any

damage to the carrier. Upon opening the container, any concealed damage should also be immediately reported to the carrier.

• Remove the shipping carton, tape, and packing material. If any are left in the appliance,

it will not work properly.

• See the nameplate on the rear panel, and check that your voltage supplied corresponds

with the voltage specied on the nameplate.

• Remove the panels to prevent damage when installing the appliance. See "II.C. How to Remove Panels."

• Remove the package containing the accessories.

• Remove the protective plastic lm from the panels. If the appliance is exposed to the

sun or to heat, remove the lm after the appliance cools.

• Check that the refrigerant lines do not rub or touch lines or other surfaces, and that the

fan blade (if applicable) turns freely.

• Check that the compressor is snug on all mounting pads.

• 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

KML-250M_H KML-351M_H KML-451M_H KML-631M_H

30" or Wider B-500 Series

For further options, contact your local Hoshizaki distributor.

• NOTICE! Remote model must be connected to an appropriate remote condenser unit. The remote condenser unit listed below is 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

KML-631MRH URC-9F

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.

• Top Insulation Panel: Lift off.

Top Panel

Top Insulation Panel

Front Insulation Panel

Right Side Panel

Front Panel

Screw

Fig. 1

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.

1a) Dispenser Unit: Follow the dispenser unit's setup procedure.

1b) 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)

Mounting Brackets

Icemaker

Dispenser Unit

Fig. 2b

Ice Storage Bin

Bolts

Intentionally Left Blank

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 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 in the junction box. See Fig. 3.

Additional Warnings for Remote Models

• THE REMOTE CONDENSER UNIT MUST BE GROUNDED. Power supply and

ground wire 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 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.

• 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.

KML-250M_H

115-120/60/1

WARNING

ELECTRICAL CONNECTION

THIS UNIT MUST BE GROUNDED

Failure to properly ground or wire this unit could result in death, serious injury, or severe damage to the icemaker. The white lead must be connected to the neutral conductor of the power source. See diagram below.

JUNCTION BOX

15-120V

BROWN

WHITE

KML-351M_H KML-451M_H

KML-631M_H

Fig. 3

F. Water Supply and Drain Connections

See Figs. 4 through 8

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.

• 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, dispenser unit/ice storage bin, and water-cooled condenser (if applicable) and the oor

drain.

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

• An icemaker water supply line shut-off valve and drain valve must be installed.

• Be sure there is sufficient extra water supply line and drain line for the appliance to be

pulled out for service.

Icemaker Water Supply Inlet

Remote Condenser Line Set Connections (Remote Model)

1/2" FPT

Minimum 1/4" Nominal ID Copper

Water Tubing or Equivalent

Icemaker

Shut-Off Valve

Drain Valve

Icemaker Drain Outlet

3/4" FPT

Vent Tube

Bin Drain Outlet

3/4" FPT

Ice Storage Bin

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-inch (5-cm) vertical air gap between the end of each pipe and the drain.

2-inch (5-cm) air gap

Floor

Drain

Fig. 4

Model Shown: KML-631MRH

Air-Cooled and Remote Models

2. Water-Cooled Condenser

a) KML-250/351/451MWH

(1) 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).

Minimum 1/4" Nominal ID Copper

Icemaker Water Supply Inlet

1/2" FPT

Condenser Drain Outlet

3/8" FPT

Icemaker

Water Tubing or Equivalent

Shut-Off Valve

Condenser Water Supply Inlet

1/2" FPT

Vent Tube

Icemaker Drain Outlet

3/4" FPT

Minimum 1/4"

Nominal ID Hard Pipe or Equivalent

Bin Drain Outlet

3/4" FPT

Fig. 5

Model Shown: KML-451MWH

Drain Valve

Ice Storage Bin

Vent Tube

Minimum 3/4" Nominal ID

Hard Pipe or Equivalent

Water-Cooled Models

Connection to an Open Drain System

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-inch (5-cm) vertical air gap between the end of each pipe and the drain.

2-inch (5-cm) air gap

Floor

Drain

(2) 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).

Minimum 1/4" Nominal ID Copper

Icemaker Water Supply Inlet

1/2" FPT

Condenser Return Outlet

3/8" FPT

Icemaker

Water Tubing or Equivalent

Shut-Off Valve

Condenser Water Supply Inlet

1/2" FPT

Vent Tube

Icemaker Drain Outlet

3/4" FPT

Bin Drain Outlet

3/4" FPT

Fig. 6

Model Shown: KML-451MWH

Drain Valve

Ice Storage Bin

Vent Tube

Minimum 3/4" Nominal ID

Hard Pipe or Equivalent

Water-Cooled Models

Connection to a Closed Loop System

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-inch (5-cm) vertical air gap between the end of each pipe and the drain.

2-inch (5-cm) air gap

Floor

Drain

b) KML-631MWH

(1) 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

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).

Minimum 1/4" Nominal ID Copper

Icemaker Water Supply Inlet

1/2" FPT

Condenser Drain Outlet

3/8" FPT

Icemaker

Water Tubing or Equivalent

Shut-Off Valve

Condenser Water Supply Inlet

1/2" FPT

Vent Tube

Icemaker Drain Outlet

3/4" FPT

Minimum 1/4"

Nominal ID Hard Pipe or Equivalent

Bin Drain Outlet

3/4" FPT

Fig. 7

Model Shown: KML-631MWH

Drain Valve

Ice Storage Bin

Vent Tube

Minimum 3/4" Nominal ID

Hard Pipe or Equivalent

Water-Cooled Models

Connection to an Open Drain System

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-inch (5-cm) vertical air gap between the end of each pipe and the drain.

2-inch (5-cm) air gap

Floor

Drain

(2) 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

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).

Minimum 1/4" Nominal ID Copper

Icemaker Water Supply Inlet

1/2" FPT

Condenser Return Outlet

3/8" FPT

Icemaker

Water Tubing or Equivalent

Shut-Off Valve

Condenser Water Supply Inlet

1/2" FPT

Vent Tube

Icemaker Drain Outlet

3/4" FPT

Bin Drain Outlet

3/4" FPT

Fig. 8

Model Shown: KML-631MWH

Drain Valve

Ice Storage Bin

Vent Tube

Minimum 3/4" Nominal ID

Hard Pipe or Equivalent

Water-Cooled Models

Connection to a Closed Loop System

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-inch (5-cm) vertical air gap between the end of each pipe and the drain.

2-inch (5-cm) air gap

Floor

Drain

G. Installation of Remote Condenser Unit

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 should 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 icemaker performance.

• The maximum line length for the standard line sizes and refrigerant charge is 66feet (20 m). With larger line sizes and/or additional refrigerant, the maximum line length is 100 feet (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 feet (10 m) above or 10 feet (3 m) below the icemaker. These distances are measured tting to tting. See Fig. 9.

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. 10.

Icemaker

Min. 24" (61 cm) Clearance

Air Air

Max. 33 Feet (10 m)

Remote Condenser Unit

Icemaker

Max. 10 Feet (3 m)

Service Loop

Fig. 9

Service Loop

Remote Condenser Unit

Fig. 10

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 blade moves freely.

3. Setup

1) Assemble 2 sets of legs using the legs, bolts, and nuts provided. See Fig. 11.

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).

Bolt with Split Lock Washer and Flat Washer

Plate

Nut

Fig. 11

Nut

Leg

Bolt with Split Lock Washer and Flat Washer

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 Remote

Hoshizaki Icemaker

KML-631MRH URC-9F 3/8" OD1/2" OD Not

Condenser Unit

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

Discharge Line

Charge Adjustment

Applicable

Greater than 66 Feet (20 m)

Maximum 100 Feet (30.5 m)

Liquid

Line

3/8" OD1/2" OD Add 0.4 oz. for each

Discharge Line

Charge Adjustment (R-404A)

foot over 66 feet

(40g for each meter over 20m). Write

new total charge on icemaker's rating label.

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. 12. 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. 13. NOTICE! Do not use thread sealant on the ttings. Use POE refrigerant oil or Parker Super O Lube 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. 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.

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. 14.

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

charging of the appliance.

(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. 12.

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.

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. 13. NOTICE! Do not use thread sealant on the ttings. Use POE refrigerant oil or Parker Super O Lube 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. 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.

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. 14.

8) If the line set exceeds 66 feet, see "II.G.4. Line Set Size and Refrigerant Charge" for

proper charging of the appliance.

Remote Condenser Unit

Icemaker

Male Fitting

Female Coupling

Fig. 12

Fig. 13

Fig. 14

Male Fitting

Brush

Threads

Reference Line

Backup Wrench

Diaphragm

O-Ring

Wrench

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

Service Loop

Backup Wrench

DO NOT USE

THREAD SEALANT

1/6 Tu r n

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's fan motor junction box to the remote condenser unit's 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's fan motor

junction box to the leads in the remote condenser unit's 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 icemaker 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. 15.

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

Fig. 15

Remote Condenser Unit

Screws

Junction Box Cover

Louver Panel

Fan Motor Junction Box Cover

Icemaker

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. See Fig. 16.

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

Lower Remote Condenser Unit

Fig. 16

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 all 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 model, 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) 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 model:

• Is the line set sized as specied, insulated, tightened, and free of leaks and kinks? If the line set exceeds 66 feet (20 m), has the charge been adjusted as specied?

• Has the icemaker 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 icemaker and the importance of the recommended periodic maintenance?

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

13) Has the warranty card been lled out and forwarded to the factory for warranty registration?

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, do not leave the control switch in the "SERVICE" 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.

3) Move the control switch on the control box to the "ICE" position.

4) Replace the front panel in its correct position.

5) Turn on the power supply, and allow the icemaker to operate for a total of 10 minutes.

6) Remove the front panel, then move the service switch to the "DRAIN" position. Move the control switch to the "SERVICE" position.

7) Replace the front panel in its correct position and allow the icemaker to drain for 2 minutes.

8) Turn off the power supply.

9) Remove the front panel, then move the control switch to the "ICE" position.

10) Replace the front panel in its correct position.

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

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

13) When the icemaker is running, hold ice in contact with the bin control thermostat bulb. The icemaker should stop within 10 seconds. Adjustment may be needed, particularly at higher altitude locations.

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

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

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 service 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.

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.

NOTICE

To prevent damage to the water pump, do not leave the control switch in the

"SERVICE" position for extended periods when the water tank is empty.

1. Cleaning Procedure

1) Dilute Hoshizaki "Scale Away" with warm water. Refer to the table.

Model Scale Away Warm Water

KML-451 and Smaller 10.5 . oz. (310 ml) 2 gal. (7.6 l) KML-631 13.5 . oz. (400 ml) 2.5 gal. (9.5 l)

2) Remove all ice from the evaporator and the dispenser unit/ice storage bin. Note: To remove cubes on the evaporator, turn off the power supply and turn it back on

after 3 minutes. The harvest cycle starts and the cubes will be removed from the evaporator.

3) Turn off the power supply.

4) Remove the front panel, then move the service switch to the "DRAIN" position. Move the control switch to the "SERVICE" position.

5) Replace the front panel in its correct position, then turn on the power supply for 2 minutes.

6) Turn off the power supply.

7) Remove the front panel, then remove the front insulation panel by lifting up the panel slightly and pulling it towards you.

8) In bad or severe water conditions, clean the oat switch assembly as described below.

Otherwise, continue to step 9.

a. Remove the 3 screws securing the oat switch assembly, then remove the

assembly.

b. Remove the retainer rod from the bottom of the oat switch housing, then remove

the oat. Be careful not to bend the retainer rod excessively when removing it.

c. Wipe down the oat switch housing, shaft, oat, and retainer rod with cleaning

solution. Rinse the parts thoroughly with clean water.

d. Reassemble the oat switch assembly and replace it in its correct position. Secure

the oat switch assembly with the screws.

9) Pour the cleaning solution into the water tank.

10) Move the service switch to the "WASH" position.

11) Replace the front insulation panel and the front panel in their correct positions.

12) Turn on the power supply to start the washing process.

13) Turn off the power supply after 30 minutes.

14) Remove the front panel.

15) Move the service switch to the "DRAIN" position.

16) Replace the front panel in its correct position, then turn on the power supply for 2 minutes.

17) Turn off the power supply, then remove the front panel.

18) Move the control switch to the "ICE" position.

19) Replace the front panel in its correct position.

20) Turn on the power supply to ll the water tank with water.

21) Turn off the power supply after 3 minutes.

22) Remove the front panel.

23) Move the service switch to the "WASH" position, then move the control switch to the "SERVICE" position.

24) Replace the front panel in its correct position.

25) Turn on the power supply to rinse off the cleaning solution.

26) Turn off the power supply after 5 minutes.

27) Remove the front panel.

28) Move the service switch to the "DRAIN" position.

29) Replace the front panel in its correct position, then turn on the power supply for 2 minutes.

30) Turn off the power supply.

31) Remove the front panel.

32) Repeat steps 18 through 31 three more times to rinse thoroughly.

Note: If you do not sanitize the icemaker, go to step 14 in "2. Sanitizing Procedure."

2. Sanitizing Procedure - Following Cleaning Procedure

1) Dilute a 5.25% sodium hypochlorite solution (chlorine bleach) with warm water. Refer to

the table.

Model

KML-451 and Smaller 1.0 . oz. (30 ml) 2 gal. (7.6 l) KML-631 1.25 . oz. (37 ml) 2.5 gal. (9.5 l)

5.25% Sodium Hypochlorite Solution (Chlorine Bleach)

Warm Water

2) Remove the front insulation panel.

3) Pour the sanitizing solution into the water tank.

4) Move the service switch to the "WASH" position.

5) Replace the front insulation panel and the front panel in their correct positions.

6) Turn on the power supply to start the sanitizing process.

7) Turn off the power supply after 15 minutes.

8) Remove the front panel.

9) Move the service switch to the "DRAIN" position.

10) Replace the front panel in its correct position, then turn on the power supply for 2 minutes.

11) Turn off the power supply.

12) Remove the front panel.

13) Repeat steps 18 through 31 in "1. Cleaning Procedure" two times to rinse thoroughly.

14) Move the control switch to the "ICE" position.

15) Replace the front panel in its correct position.

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

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

IV. Preparing the Icemaker 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, do not leave the control switch in the "SERVICE" 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 control switch to the "ICE" 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 service switch to the "DRAIN" position, then move the control switch to the "SERVICE" position.

3) Replace the front panel in its correct position, then turn on the power supply for 2 minutes.

4) Turn off the power supply, then remove the front panel.

5) Move the control switch to the "OFF" position.

6) Replace the front panel in its correct position.

7) 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.

3. On water-cooled model, 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 right side, top, and front panels in their correct positions.

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.

HOSHIZAKI AMERICA, INC.

618 Hwy. 74 S., Peachtree City, GA 30269 USA TEL (770) 487-2331 FAX (770) 487-3360 www.hoshizaki.com 1A3085-010

Hoshizaki MRH, MWH KML-351MAH, MWH KML-631MAH, KML-250MAH, MWH User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Important Safety Information

A. Electrical and Refrigerant Data

1. KML-250M_H

2. KML-351M_H

3. KML-451M_H

4. KML-631M_H

B. Dimensions/Connections

1. Air-Cooled Models (MAH)

2. Water-Cooled Models (MWH)

3. Remote Models (MRH)

4. Remote Condenser Unit URC-9F (use with KML-631MRH)

II. Installation and Operating Instructions

A. Location

B. Checks Before Installation

C. How to Remove Panels

D. Setup

E. Electrical Connection

F. Water Supply and Drain Connections

1. Icemaker

2. Water-Cooled Condenser

a) KML-250/351/451MWH

b) KML-631MWH

G. Installation of Remote Condenser Unit

1. Location

2. Checks Before Installation

3. Setup

4. Line Set Size and Refrigerant Charge

5. Line Set Installation

6. Electrical Connection

7. Stacking Remote Condenser Unit

H. Final Checklist

I. Startup

III. Maintenance

A. Maintenance Schedule

B. Cleaning and Sanitizing Instructions

1. Cleaning Procedure

2. Sanitizing Procedure - Following Cleaning Procedure

IV. Preparing the Icemaker for Periods of Non-Use

V. Disposal