HOSHIZAKI MODULAR CRESCENT CUBER

1. NAMEPLATE RATING

The nameplate, located on the upper right side of the rear panel, provides electrical and refrigeration specifications. Due to its location, it may be difficult to read if the icemaker is against a wall. The rating label, visible after removing the front panel, contains the same information.

HOSHIZAKI reserves the right to make changes in specifications and design without prior notice.

[a] KM-900MAH (Air-cooled)

(Details from nameplate typically include Model Number, Serial Number, AC Supply Voltage, Compressor, Pump, Fan, Other, Maximum Fuse Size, Maximum HACR Breaker, Maximum Circ. Breaker, Minimum Circuit Ampacity, Design Pressure, Refrigerant, Motor-Compressor Protection, and Usage Note.)

[b] KM-900MWH (Water-cooled)

(Specifications vary slightly, particularly for refrigerant charge and fuse/breaker sizes.)

[c] KM-900MRH (Remote Air-cooled)

(Specifications include details for the remote fan.)

[d] KM-900MRH3 (Remote Air-cooled, 3 phase)

(Specifications include details for the 3-phase power supply.)

2. DIMENSIONS/CONNECTIONS

(This section typically includes diagrams showing front, side, bottom, and back views with dimensions in mm and inches for each model group. Key connection points like electrical supply, water inlet, and drain outlets are indicated.)

[a] KM-900MAH: Diagrams show overall dimensions and locations for electrical supply (7/8" DIA OPENING), water inlet (1/2" FPT), and drain (3/8" O.D. PIPE for dew water, 3/4" FPT for main drain).

[b] KM-900MWH: Diagrams show overall dimensions and connection points, including water-cooled condenser connections (inlet 1/2" FPT, outlet 3/8" FPT) in addition to the icemaker's electrical supply and drains.

[c] KM-900MRH, KM-900MRH3: Diagrams show overall dimensions and connection points, similar to KM-900MAH, with indications for remote fan motor connection and refrigerant lines.

1. CHECKS BEFORE INSTALLATION

IMPORTANT: Remove all shipping carton, tape(s), and packing. If packing material remains, the icemaker may not function properly.

1. Remove panels to prevent installation damage. Refer to Section 2 for panel removal.
2. Remove accessories from their packaging.
3. Release the Bin Switch assembly: Remove Base Cover, loosen thumbscrew on Bin Control Shield, remove shipping tape holding the switch actuator arm and paddle, ensuring the paddle swings freely. Replace Shield, secure thumbscrew, and replace Base Cover.
4. Remove protective plastic film from panels. If exposed to sun or heat, remove film after the unit cools.
5. Verify refrigerant lines do not rub against surfaces and the fan blade turns freely.
6. Ensure the Compressor is securely mounted on its pads.
7. Check the Nameplate on the Rear Panel to confirm the supplied voltage matches the specifications.
8. This icemaker requires a storage bin; the recommended model is HOSHIZAKI ICE STORAGE BIN, Model B-500 series.
9. For remote air-cooled models, a remote condenser unit is required; the recommended model is HOSHIZAKI CONDENSER UNIT, MODEL URC-12F.

2. HOW TO REMOVE PANELS

Refer to Figure 1 for panel removal:

1. Front Panel: Remove screw, lift up, and pull towards you.
2. Top Panel: Lift front slightly, push away, then lift off.
3. Side Panel (R): Remove screw, pull slightly towards you, then lift off.
4. Insulation Panel: Lift slightly, then pull towards you.
5. Base Cover: Lift slightly, then pull towards you.

(Figure 1 shows a line drawing of the icemaker with panels labeled for removal.)

3. LOCATION

WARNING: This icemaker is not intended for outdoor use. Normal operating ambient temperature range is +45°F to +100°F. Normal operating water temperature range is +45°F to +90°F. Operation outside these ranges may affect production capacity.

For best operating results:

• Avoid locating the icemaker next to ovens, grills, or other high heat-producing equipment.
• Ensure the location provides a firm and level foundation.
• Allow 6 inches (approx. 15 cm) clearance at the rear, sides, and top for proper air circulation and access for maintenance or service.

4. SET UP

Refer to Figure 2 for setup:

1. Unpack the Storage Bin and attach the four adjustable legs (bin accessory) to its bottom.
2. Position the Storage Bin in its permanent location.
3. Place the icemaker on top of the Storage Bin.
4. Secure the icemaker to the Storage Bin using the provided mounting brackets and four bolts.
5. Level the icemaker/Storage Bin in both left-to-right and front-to-rear directions by adjusting the Ice Bin Legs.
6. Replace all panels in their correct positions.

(Figure 2 illustrates the icemaker mounted on a storage bin with mounting brackets and bolts.)

5. ELECTRICAL CONNECTION

WARNING: Electrical connections must comply with the "WARNING" tag on the pig tail leads and meet all national and local electrical code requirements. Install a proper ground wire to prevent electrical shock and equipment damage.

• Single Phase Models: The white lead must connect to the neutral conductor of the power source. Incorrect wiring can cause severe damage. Refer to Figure 3.
• Three Phase Models: Position the Voltage Tap Switch to match the incoming voltage at start-up. Refer to Figure 4.
• The icemaker requires a separate power supply or receptacle of adequate capacity, as indicated on the Nameplate.
• The power supply connection opening is 7/8" DIA, suitable for a 1/2" trade size conduit.
• An electrical permit and services of a licensed electrician are usually required.

(Figure 3 shows a wiring diagram for single-phase connection. Figure 4 shows a wiring diagram for three-phase connection, including the voltage tap switch.)

6. INSTALLATION OF REMOTE CONDENSER UNIT

7. WATER SUPPLY AND DRAIN CONNECTIONS

WARNING: Do not operate the icemaker if the water supply is OFF or pressure is below 10 PSIG to prevent damage to the pump assembly. Ensure proper water pressure is reached before operation.

• Water supply inlet is 1/2" female pipe thread (FPT). On water-cooled models, two inlets are provided: one for the icemaker and one for the condenser.
• Install a water supply line shut-off valve and a drain valve. A minimum of 3/8" OD copper tubing is recommended for water supply lines.
• Water supply pressure should be between 10 PSIG and 113 PSIG. A pressure reducing valve is required if pressure exceeds 113 PSIG.
• Drain outlet for icemaker dump is 3/4" FPT. The drain for condensation is a 3/8" ID pipe. Icemaker and condenser drain piping must be separate from the bin drain. On water-cooled models, a 3/8" FPT is provided for the condenser drain outlet.
• Drains must have a 1/4" fall per foot on horizontal runs for proper flow.
• Do not pipe drains directly to the sewer system. Maintain a minimum 2-inch (approx. 5 cm) vertical air gap between the end of the drain pipe and the floor drain.
• Installation must comply with applicable national, state, and local regulations.
• A plumbing permit and services of a licensed plumber may be required.
• A back flow preventer may be required in the cooling water circuit in some areas.

(Figure 10 shows diagrams for water supply and drain connections for both air-cooled and water-cooled models, including the air gap detail.)

8. FINAL CHECK LIST

Verify the following before operation:

1. Is the icemaker level?
2. Is the ambient temperature within +45°F to +100°F year-round?
3. Is there at least 6" clearance around the icemaker for maintenance/service?
4. Have all shipping carton, tapes, and packing been removed?
• Is the cube guide in its correct position?
• Does the Bin Switch assembly actuator arm and paddle swing freely?
5. Have all electrical and piping connections been made?
6. Has the power supply voltage been checked against the nameplate rating, and is a proper ground installed?
7. Are the Water Supply Line Shut-off Valve and Drain Valve installed? Has water supply pressure been checked (min. 10 PSIG, max. 113 PSIG)?
• Note: The icemaker may stop if water supply is OFF or below 10 PSIG. It will restart automatically when pressure is restored.
8. Have compressor hold-down bolts and refrigerant lines been checked for vibration and possible failure?
9. Has the end user received the instruction manual and been instructed on operation and periodic maintenance?
10. Has the end user been provided with the name and telephone number of an authorized service agent?
11. Has the warranty tag been filled out and forwarded for registration?

9. START UP

CAUTION: All parts are factory-adjusted; improper adjustments can cause failure. Wait at least 3 minutes before restarting after shutdown to prevent compressor damage. Do not operate in "WASH" position without water in the Water Tank, as this can damage the Water Pump seal.

1. Open the Water Supply Line Shut-off Valve.
2. Remove the Front Panel.
3. Move the Control Switch on the Control Box to the "ICE" position.
4. Replace the Front Panel.
5. Turn on the power supply. Allow the Water Tank to fill and the icemaker to operate for 10 minutes.
6. Remove the Front Panel and Base Cover, then turn the control switch to "OFF".
7. Check that the Bin Switch shuts down the unit:
• Turn the control switch to "ICE".
• Allow the unit to enter the freeze mode (pump motor supplies water upwards). After 1-2 minutes in freeze, move the bin switch paddle fully to the right (refer to Figure 11).
• The unit should shut down within 3-5 seconds.
8. Turn off the power supply. Remove one end of the Pump Tubing and drain the Water Tank (refer to Figure 12).
9. Replace the Pump Tubing.
10. Clean the Storage Bin.
11. Replace the Base Cover and Front Panel.
12. Turn on the power supply to start the automatic icemaking process.

Note: The Bin Switch only shuts down the unit at the end of a harvest or within the first 5 minutes of the freeze cycle. To shut down at other times, turn the control switch to "OFF".

(Figure 11 shows the bin switch mechanism. Figure 12 shows draining the water tank via pump tubing.)

10. PREPARING THE ICEMAKER FOR LONG STORAGE

WARNING: When shutting off for extended periods, drain all water from the water line and remove ice from the Storage Bin. Clean and dry the Storage Bin. Drain the icemaker to prevent water line damage at sub-freezing temperatures, using a foot or hand pump. Shut off until proper ambient temperature is restored.

For short periods (2-3 days), simply turn the Control Switch to "OFF", unless sub-freezing temperatures are expected.

[1] On water-cooled models: Drain the water-cooled condenser:

1. Remove the Front Panel.
2. Move the Control Switch to "OFF".
3. Wait 3 minutes.
4. Move the Control Switch to "ICE".
5. Allow 5 minutes for the icemaker to fill and the Water Pump to operate.
6. Close the Water-cooled Condenser Water Supply Line Shut-off Valve (refer to Figure 10).
7. Open the Drain Valve for the water-cooled condenser water supply line.
8. Allow the line to drain by gravity.
9. Attach compressed air or carbon dioxide supply to the Condenser Water Line Drain Valve.
10. Blow out the condenser using compressed air or carbon dioxide until water stops exiting.

[2] Remove water from the potable water supply line:

1. Remove the Front Panel (except on water-cooled models).
2. Move the Control Switch to "OFF".
3. Wait 3 minutes.
4. Close the Potable Water Supply Line Shut-off Valve and open the Potable Water Supply Line Drain Valve (refer to Figure 10).
5. Allow the line to drain by gravity.
6. Attach compressed air or carbon dioxide supply to the Potable Water Line Drain Valve.
7. Move the Control Switch to "ICE".
8. Blow out the potable water line using compressed air or carbon dioxide.

[3] Drain the Potable Water Tank:

1. Turn off the power supply.
2. Move the Control Switch to "OFF".
3. Remove the Base Cover.
4. Remove one end of the Pump Tubing and drain the Water Tank.
5. Replace the Pump Tubing and Base Cover.
6. Remove all ice from the Storage Bin and clean it.
7. Replace the Front Panel.

1. CLEANING INSTRUCTIONS

WARNING: HOSHIZAKI recommends cleaning at least once a year; more frequent cleaning may be needed depending on water conditions. Do not use ammonia-type cleaners to prevent injury and damage. Always wear liquid-proof gloves when handling cleaning and sanitizing solutions.

IMPORTANT: The Cleaning Valve provides access to the Evaporator for cleaning/sanitizing and must be closed for icemaking. The Compressor will not operate unless this valve is fully closed. To open the valve, the handle should be parallel to the valve body; to close, it should be at a right angle.

(Diagrams show CLOSED and OPEN positions of the Cleaning Valve.)

2. MAINTENANCE

IMPORTANT: Maintain the icemaker according to this manual and provided labels.

1. Stainless Steel Exterior: Wipe occasionally with a clean, soft cloth. Use a damp cloth with a neutral cleaner to remove oil or dirt buildup to prevent corrosion.
2. Storage Bin and Scoop:
   • Wash hands before removing ice. Use the provided Plastic Scoop (Accessory).
   • The Storage Bin is for ice only; do not store other items.
   • Keep the Scoop clean by using a neutral cleaner and rinsing thoroughly.
   • Clean the bin liner with a neutral cleaner and rinse thoroughly.
3. Air Filter (Air-cooled model only): A plastic mesh filter removes dirt/dust, preventing condenser clogging. A clogged filter reduces performance. Check the filter at least twice a month. Wash clogged filters with warm water and a neutral cleaner.
4. Condenser (Except water-cooled model): Check the Condenser annually. Clean with a brush or vacuum cleaner if needed. More frequent cleaning may be necessary depending on the icemaker's location.