Hoshizaki KM-501MAH Modular Crescent Cuber Instruction Manual

: June 17, 2024
: HOSHIZAKI

Table of Contents

Hoshizaki KM-501MAH Modular Crescent Cuber
Product Usage Instructions
**Speciﬁcations
**Dimensions / Connections
Installation and Operating Instructions
Setup
Electrical Connection
Stacking Condenser Unit
Cleaning and Maintenance Instructions
References
Read User Manual Online (PDF format)
Download This Manual (PDF format)

Hoshizaki KM-501MAH Modular Crescent Cuber

Specifications
Nameplate Rating:

Model: KM-501MAH (air-cooled)
Serial Number: (not mentioned)
AC Supply Voltage: 115-120/60/1
Compressor: 115-120V 11RLA 50LRA
Pump: 120V 0.5FLA 10W
Fan: 120V 0.85FLA 50W
Other: 115-120V 0.15A
Maximum Fuse Size: 20 AMPS
Max. HACR Breaker (USA only): 20 AMPS
Max. Circ. Breaker (Canada only): 20 AMPS
Minimum Circuit Ampacity: 20 AMPS
Design Pressure: HI-467PSI LO-206PSI
Refrigerant: 404A 1 LB 10 OZ

Product Usage Instructions

Installation
Only qualified service technicians should attempt to install, service, or maintain this ice maker. No installation, service, or maintenance should be undertaken until the technician has thoroughly read this Instruction Manual. Likewise, the owner/manager should not proceed to operate the icemaker until the installer has instructed them on its proper operation.

Maintenance
This manual is provided primarily to assist qualified service technicians in the installation, maintenance, and service of the icemaker. If you have any questions or concerns that have not been satisfactorily addressed, please call or write to the HOSHIZAKI Technical Support Department for assistance.

HOSHIZAKI Technical Support Department Contact Information:

Address: 618 Highway 74 South Peachtree City, GA 30269
Phone: 1-800-233-1940 Technical Service 770-487-2331
Fax: 1-800-843-1056 770-487-3360
Website: www.hoshizaki.com

Note
To expedite assistance, all correspondence/communication MUST include the following information:

FAQ (Frequently Asked Questions)

Q: Who should install, service, or maintain the icemaker?
A: Only qualified service technicians should attempt to install, service, or maintain this icemaker.
Q: Where can I find the electrical and refrigeration specifications?
A: The electrical and refrigeration specifications can be found on the nameplate, which is located on the upper right-hand side of the rear panel. Alternatively, you can also find this information on the rating label by removing only the front panel of the ice maker.
Q: Can the icemaker be used outdoors?
A: No, the icemaker is not intended for outdoor use.
Q: Are there any changes in specifications and design?
A: HOSHIZAKI reserves the right to make changes in specifications and design without prior notice.

IMPORTANT
Only qualiﬁed service technicians should attempt to install, service or maintain this icemaker. No installation, service, or maintenance should be undertaken until the technician has thoroughly read this Instruction Manual. Likewise, the owner/manager should not proceed to operate the icemaker until the installer has instructed them on its proper operation.

HOSHIZAKI provides this manual primarily to assist qualiﬁed service technicians in the installation, maintenance, and service of the icemaker. Should the reader have any questions or concerns that have not been satisfactorily addressed, please call or write to the HOSHIZAKI Technical Support Department for assistance.
HOSHIZAKI AMERICA, INC.
618 Highway 74 South
Peachtree City, GA 30269
Attn: HOSHIZAKI Technical Support Department
Phone: 1-800-233-1940 Technical Service
770-487-2331
Fax: 1-800-843-1056
Web Site: www.hoshizaki.com

NOTE : To expedite assistance, all correspondence/communication MUST include the following information:

Model Number
Serial Number
Complete and detailed explanation of the problem
Please review this manual. It should be read carefully before the icemaker is installed and operated. Only qualiﬁed service technicians should install, service, and maintain the icemaker. This manual should be made available to the technician before installation, maintenance, or service.
Keep this manual with the icemaker for later reference.

**Speciﬁcations

**

A. Nameplate Rating

KM-501MAH (air-cooled) See the nameplate for electrical and refrigeration speciﬁcations. This nameplate is located on the upper right-hand side of the rear panel.
Since this nameplate is located on the rear panel of the icemaker, it cannot be read when the back of the icemaker is against a wall or another piece of kitchen equipment. Therefore, the necessary electrical and refrigeration information is also on the rating label, which can be easily seen by removing only the front panel of the ice maker.
We reserve the right to make changes in speciﬁcations and design without prior notice.
KM-501MWH (water-cooled) See the nameplate for electrical and refrigeration speciﬁcations. This nameplate is located on the upper right-hand side of the rear panel.
Since this nameplate is located on the rear panel of the icemaker, it cannot be read when the back of the icemaker is against a wall or another piece of kitchen equipment. Therefore, the necessary electrical and refrigeration information is also on the rating label, which can be easily seen by removing only the front panel of the ice maker.
We reserve the right to make changes in speciﬁcations and design without prior notice.
KM-501MRH (remote air-cooled) See the nameplate for electrical and refrigeration speciﬁcations. This nameplate is located on the upper right-hand side of the rear panel.
Since this nameplate is located on the rear panel of the icemaker, it cannot be read when the back of the icemaker is against a wall or another piece of kitchen equipment. Therefore, the necessary electrical and refrigeration information is also on the rating label, which can be easily seen by removing only the front panel of the ice maker.
We reserve the right to make changes in speciﬁcations and design without prior notice.

**Dimensions / Connections

**

KM-501MAH
KM-501MWH
KM-501MRH

Installation and Operating Instructions

A. Checks Before Installation
IMPORTANT

Remove the shipping carton, tape(s), and packing. If packing material is left in the icemaker, it will not work properly.
Ensure all components, fasteners, and thumbscrews are securely in place.

Remove the panels to prevent damage when installing the icemaker. See “B. How to Remove Panels.”
Remove the package containing the accessories.
Remove the protective plastic ﬁlm from the panels. If the icemaker is exposed to the sun or to heat, remove the ﬁlm after the icemaker cools.
Check that the refrigerant lines do not rub or touch lines or other surfaces and that the fan blade turns freely.
Check that the compressor is snug on all mounting pads.
See the nameplate on the rear panel, and check that your voltage supplied corresponds with the voltage speciﬁed on the nameplate.
This icemaker needs a storage bin. The recommended storage bin is HOSHIZAKI ICE STORAGE BIN, Model B-300 series.
On remote air-cooled models, a remote condenser unit is needed. The recommended remote condenser unit is HOSHIZAKI CONDENSER UNIT, MODEL URC-6F.

B. How to Remove Panels
See Fig. 1

Front Panel: Remove the screw. Lift and pull towards you.
Top Panel: Lift slightly its front, push away, and then lift off.
Side Panel (R): Remove the screw. Pull slightly towards you, and lift off.
Insulation Panel: Lift slightly, and pull towards you.
Base Cover: Lift slightly, and pull towards you.

C. Location
WARNING
This icemaker is not intended for outdoor use. Normal operating ambient temperature should be between +45°F to +100°F; Normal operating water temperature should be between +45°F to +90°F. Operation of the icemaker, for extended periods, outside of these normal temperature ranges may affect production capacity.

For best operating results:

Icemakers should not be located next to ovens, grills or other high-heat-producing equipment.
The location should provide a ﬁrm and level foundation for the equipment.
Allow 6″ clearance at the rear, sides, and top for proper air circulation and ease of maintenance and/or service should they be required.

D. Setup

Unpack the storage bin, and attach the four adjustable legs provided (bin accessory) to the bottom of the storage bin.
Position the storage bin in the selected permanent position.
Place the icemaker on the top of the storage bin.
Secure the icemaker to the storage bin, by using the two universal braces and the two bolts provided. See Fig. 2
Level the icemaker/storage bin in both the left-to-right and front-to-rear directions. Adjust the ice bin legs to make the icemaker level.
Replace the panels in their correct positions.

E. Electrical Connection
WARNING

Electrical connection must be made under the instructions on the “WARNING” tag, provided with the pig tail leads in the junction box.
This icemaker requires a ground that meets the national and local electrical code requirements. To prevent possible electrical shock to individuals or extensive damage to the equipment, install a proper ground wire to the icemaker.

The white lead must be connected to the neutral conductor of the power source. Miswiring results in severe damage to the icemaker. See Fig. 3.
This icemaker must have a separate power supply or receptacle of proper capacity. See the nameplate.
The opening for the power supply connection is 7/8″ DIA to ﬁt a 1/2″ trade-size conduit.
Usually, an electrical permit and the services of a licensed electrician are required.

F. Installation of Remote Condenser Unit

Checks Before Installation
Unpack and remove the shipping carton, tape(s), and packing.
Check that the refrigerant lines do not rub or touch lines or other surfaces and that the fan blade moves freely.
Location
The condenser unit must be positioned in a permanent site under the following guidelines.
- A ﬁrm and ﬂat site.
- A dry and well-ventilated area with 24″ clearance on both front and rear for ease of maintenance and service should they be required.
- Normal condenser ambient temperature: -20°F to +122°F. Temperatures not within this operating range may affect the production capacity of the icemaker.
- The maximum line length for the standard refrigerant charge is 66 feet. Should an installation require a longer line length, please call 1-800-233-1940 for recommendations concerning the correct additional refrigerant charge to be added. Note: If the recommended guidelines of the installation are exceeded, the icemaker performance may be reduced.

Setup

Secure the legs to the condenser unit with eight M8 x 16 mm hexagon bolts and M8 nuts as shown in the illustration. See Fig. 5.
Note : Locate the legs symmetrically.
The legs have eight mounting holes. Secure the legs with eight bolts (not included).
Install enough length of two copper tubings provided with Parker quick connect couplings between the icemaker and the condenser unit. The two copper tubings should be insulated separately. See Fig. 6.
- Precharged tubing kits, available as optional equipment from HOSHIZAKI AMERICA are recommended.
Line sets fabricated in the ﬁeld should be evacuated through the charging ports on the Parker quick-connect couplings and charged with R-404A refrigerant vapor to a pressure of 15 – 30 PSIG.
Note : Factory-fabricated tubing kits are precharged and do not need to be evacuated.
Remove the plastic caps protecting the couplings. Attach the two refrigerant lines to the male couplings on the ice maker and the remote condenser unit. Each refrigerant line must be connected as follows:
- Icemaker discharge refrigerant line – 3/8″ OD tubing to “DIS” of the condenser unit
- Icemaker liquid refrigerant line – 1/4″ OD tubing to “LIQ” of the condenser unit
  Note : Care should be taken that the unit, line set, and condenser contain the same type of refrigerant before making connections. Mixing of refrigerants will result in improper operation and possible damage to the refrigeration system. Make the connections at the remote condenser ﬁrst and then at the ice maker.

Electrical Connection

WARNING
This remote condenser unit requires a ground that meets the national and local electrical code requirements. To prevent possible electrical shock to individuals or extensive damage to equipment, install a proper ground wire to the condenser unit.

This condenser unit must be connected to the fan motor junction box on the ice maker.
The opening for the power supply connection is 7/8″ DIA to ﬁt a 1/2″ trade-size conduit.
Usually, an electrical permit and the services of a licensed electrician are required.
1. Remove the panel.
2. Remove the junction box cover.
3. Connect the fan motor leads in the junction box of the remote condenser unit to the fan motor leads in the junction box of the HOSHIZAKI remote air-cooled icemaker.
4. Install a ground wire from the icemaker to the remote condenser unit.
5. Replace the junction box cover and the panel in their correct positions.

Stacking Condenser Unit

Secure the lower condenser unit to the legs with eight bolts (not included).
Attach the upper condenser unit on the top of the lower.
Secure the upper condenser unit with the four screws provided.
Install refrigerant lines, and make electrical connections for each fan motor as shown in Items 3. and 4.

G. Water Supply and Drain Connections
See Fig. 9
CAUTION
To prevent damage to the pump assembly, do not operate the icemaker when the water supply is OFF, or if the pressure is below 10 PSIG. Do not run the icemaker until the proper water pressure is reached.

The water supply inlet is a 1/2″ female pipe thread (FPT).
Note : On the water-cooled model, two water supply inlets are provided. One is for the ice making water inlet, and the other is for the cooling water inlet.
A water supply line shut-off valve and drain valve should be installed. A minimum of 3/8″ OD copper tubing is recommended for the water supply lines.
Note : An optional strainer should be installed next to the water supply inlet in the water supply line. HOSHIZAKI recommended an optional strainer Part Code 311166A01.
Water supply pressure should 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.
The drain outlet for the icemaker dump is 3/4″ FPT. The drain for condensation is a 3/8″ ID pipe.
The icemaker drain and the condenser drain piping connections must be made separately from the bin drain.
Note : On the water-cooled model, a 3/8″ FPT is provided for the condenser drain outlet.
The drains must have 1/4″ fall per foot on horizontal runs to get a good flow.
The drains should not be piped directly to the sewer system. An air gap of a minimum of 2 vertical inches should be between the end of the drain pipe from the icemaker or the ice bin and the floor drain.
This icemaker should be installed per applicable national, state, and local regulations.
A plumbing permit and the services of a licensed plumber may be required in some areas.
In some areas, a backflow preventer may be required in the cooling water circuit.

H. Final Checklist

Is the icemaker level?
Is the icemaker in a site where the ambient temperature is between +45°F to +100°F and the water temperature within +45°F to +90°F all year around?
Is there at least 6″ clearance at the sides, rear, and top of the icemaker for maintenance or service?
Have all shipping cartons, tapes and packing been removed from the icemaker? Is the cube guide in its correct position?
Are all components, fasteners, and thumbscrews securely in place?
Have all electrical and piping connections been made?
Has the power supply voltage been checked or tested against the nameplate rating? And has a proper ground been installed in the icemaker?
Are the water supply line shut-off valve and drain valve installed? Has the water supply pressure been checked to ensure a minimum of 10 PSIG and a maximum of 113 PSIG?
Note : The icemaker may stop running when the water supply is OFF, or if the pressure is below 10 PSIG. When the proper water pressure is reached, the icemaker automatically starts running again.
Have the compressor hold-down bolts and refrigerant lines been checked against vibration and possible failure?
Has the bin control switch been checked for correct operation? When the icemaker is running, hold an ice cube in contact with the bulb. The icemaker should stop within 3 to 10 seconds.
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?
Has the end user been given the name and telephone number of an authorized service agent?
Has the warranty tag been ﬁlled out and forwarded to the factory for warranty registration?

I. Startup
CAUTION

All parts are factory-adjusted. Improper adjustments may fail.
If the unit is turned off, wait for at least 3 minutes before restarting the icemaker to prevent damage to the compressor.
Do not operate the unit in the “WASH” position without water in the water tank. This will cause damage to the water pump seal.

Open the water supply line shut-off valve.
Remove the front panel.
Move the control switch on the control box to the “ICE” position.
Replace the front panel in its correct position.
Turn on the power supply, and allow the water tank to ﬁll with water and the icemaker to operate for a total of 10 minutes.
Turn off the power supply, and remove the front panel and the base cover.
Remove one end of the pump tubing, and drain the water tank. See Fig. 10.
Replace the pump tubing in its correct position.
Clean the storage bin.
Replace the base cover and the front panel in their correct positions.
Turn on the power supply, and start the automatic icemaking process.

J. Preparing the Icemaker for Long Storage
CAUTION
When shutting off the icemaker for an extended time, drain out all water from the water line and remove the ice from the storage bin. The storage bin should be cleaned and dried. Drain the icemaker to prevent damage to the water supply line at sub-freezing temperatures, using air or carbon dioxide. Shut off the icemaker until the proper ambient temperature is resumed.
When the icemaker is not used for two or three days, it is sufﬁcient to only move the control switch to the “OFF” position, unless the icemaker will be at sub-freezing temperatures.

On the water-cooled model only, follow the instructions below to ﬁrst remove the water from the water-cooled condenser.
Remove the front panel.
Move the control switch on the control box to the “OFF” position.
Wait 3 minutes.
Move the control switch to the “ICE” position.
Allow 5 minutes for the icemaker to ﬁll with water and the water pump to start operating.
Close the water-cooled condenser water supply line shut-off valve. See Fig. 9.
Open the drain valve for the water-cooled condenser water supply line.
Allow the line to drain by gravity.
Quickly attach compressed air or carbon dioxide supply to the condenser water line drain valve.
Blow the water-cooled condenser out using compressed air or carbon dioxide until water stops coming out.
Follow the instructions below to remove the water from the potable water supply line.
Remove the front panel. (Except water-cooled model)
Move the control switch on the control box to the “OFF” position.
Wait 3 minutes.
Close the potable water supply line shut-off valve and open the potable water supply line drain valve. See Fig. 9.
Allow the line to drain by gravity.
Attach compressed air or carbon dioxide supply to the potable water line drain valve.
Move the control switch to the “ICE” position.
Blow the potable water line out using compressed air or carbon dioxide.
Follow the instructions below to drain the potable water tank.
Turn off the power supply.
Move the control switch on the control box to the “OFF” position.
Remove the base cover.
Remove one end of the pump tubing and drain the water tank.
Replace the pump tubing and the base cover in their correct positions.
Remove all ice from the storage bin and clean the storage bin.
Replace the front panel in its correct position.

Cleaning and Maintenance Instructions

IMPORTANT
Ensure all components, fasteners, and thumbscrews are securely in place after any maintenance or cleaning is done to the equipment.

A. Cleaning Instructions
WARNING

HOSHIZAKI recommends cleaning this unit at least once a year. More frequent cleaning, however, may be required in some existing water conditions.
To prevent injury to individuals and damage to the icemaker, do not use ammonia-type cleaners.
Always wear liquid-proof gloves to prevent the cleaning and sanitizing solutions from coming into contact with the skin.

IMPORTANT

The cleaning valve is used to provide access to the inside of the evaporator during the cleaning and sanitizing operation. It should be closed for all icemaking operations. The compressor will not operate unless this valve is completely closed.
To open the cleaning valve, the valve handle should be parallel to the valve body. To close the valve, the valve handle should be at a right angle to the valve body.

Cleaning Procedure

Dilute approximately 16 ﬂ. oz. of recommended cleaner Hoshizaki “Scale Away” or “LIME-A-WAY,” (Economics Laboratory, Inc.) with 3 gal. of water.
Remove all ice from the evaporator and the storage bin.
Note : To remove cubes on the evaporator, turn off the power supply and turn it on after 3 minutes. The defrost cycle starts and the cubes will be removed from the evaporator.
Turn off the power supply.
Remove the front panel and the base cover, and then remove the insulation panel by lifting up the panel slightly and pulling it towards you.
Remove one end of the pump tubing. Drain the water tank. Replace the pump tubing in its correct position. See Fig. 10.
Pour the cleaning solution into the water tank.
Fully open the cleaning valve on the left side wall of the machine compartment.
Move the control switch on the control box to the “WASH” position.
Replace the insulation panel and the front panel in their correct positions.
Turn on the power supply, and start the washing process.
Turn off the power supply after 30 minutes.
Remove the front panel.
Remove one end of the pump tubing. Drain the water tank. Replace the pump tubing in its correct position.
Move the control switch to the “ICE” position.
Close the cleaning valve.
Replace the front panel in its correct position.
Turn on the power supply to ﬁll the water tank with water.
Turn off the power supply after 3 minutes.
Remove the front panel, and fully open the cleaning valve.
Move the control switch to the “WASH” position.
Replace the front panel in its correct position.
Turn on the power supply to rinse off the cleaning solution.
Turn off the power supply after 5 minutes.
Remove the front panel.
Remove one end of the pump tubing. Drain the water tank. Replace the pump tubing in its correct position.
Repeat the above steps 14) through 25) three more times to rinse thoroughly.
Note : If you do not sanitize the icemaker, go to the step 10) in “2. Sanitizing Procedure.”

Sanitizing Procedure – Following Cleaning Procedure

Dilute a 5.25% sodium hypochlorite solution with water (Add 1.5 ﬂ. oz. of sanitizer to 3 gal. of water).
Remove the insulation panel.
Pour the sanitizing solution into the water tank.
Replace the insulation panel and the front panel in their correct positions.
Note : Make sure that the control switch is in the “WASH” position and the cleaning valve is open.
Turn on the power supply, and start the sanitizing process.
Turn off the power supply after 15 minutes.
Remove the front panel.
Remove one end of the pump tubing. Drain the water tank. Replace the pump tubing in its correct position.
Repeat the above steps 14) through 25) in “1. Cleaning Procedure” two times to rinse thoroughly.
Close the cleaning valve.
Move the control switch to the “ICE” position.
Replace the front panel and the base cover in their correct positions.
Clean the storage bin with water.
Turn on the power supply, and start the automatic icemaking process.

B. Maintenance
IMPORTANT
This icemaker must be maintained individually, referring to the instruction manual and labels provided with the icemaker.

Stainless Steel Exterior
To prevent corrosion, wipe the exterior occasionally with a clean and soft cloth. Use a damp cloth containing a neutral cleaner to wipe off oil or dirt buildup.
Storage Bin and Scoop
- Wash your hands before removing ice. Use the plastic scoop provided (Accessory).
- The storage bin is for ice use only. Do not store anything else in the bin.
- Keep the scoop clean. Clean it by using a neutral cleaner and rinse thoroughly.
- Clean the bin liner by using a neutral cleaner. Rinse thoroughly after cleaning.
Air Filter (air-cooled model only)
A plastic mesh air ﬁlter removes dirt or dust from the air and keeps the condenser from getting clogged. As the ﬁlter gets clogged, the icemaker’s performance will be reduced. Check the ﬁlter at least twice a month. When clogged, use warm water and a neutral cleaner to wash the ﬁlter.
Condenser (except water-cooled model)
Check the condenser once a year, and clean it if required by using a brush or vacuum cleaner. More frequent cleaning may be required depending on the location of the icemaker.