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Summary of Contents for Hoshizaki KM-520MRJZ
- Page 1 Instruction Manual Modular Crescent Cuber Models KM-520MRJZ KM-660MRJZ hoshizakiamerica.com Issued: 8-24-2021...
- Page 2 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;...
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Page 3: Table Of Contents
1. Air-Cooled Models (MAJ) ..................8 2. Water-Cooled Models (MWJ) ................... 9 3. Remote Models (MRJZ)..................10 4. Remote Condenser Unit URC-5FZ (use with KM-520MRJZ or KM-660MRJZ) ..11 II. Installation and Operating Instructions ................12 A. Location ........................12 B. Checks Before Installation ................... 13 C. -
Page 4: Important Safety Information
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. - Page 5 WARNING, continued • Children should be properly supervised around the appliance. • Do not climb, stand, or hang on the appliance or allow children or animals to do so. Serious injury could occur or the appliance could be damaged. • Do not use combustible spray or place volatile or flammable substances near the appliance.
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Page 6: Specifications
HI - 467PSI LO - 250PSI HI - 427PSI LO - 250PSI HI - 467PSI LO - 250PSI Refrigerant 404A 1 LB 10.8 OZ. 404A 12.7 OZ. R404A Total Refrigerant Charge with Hoshizaki Remote Condenser Unit URC-5FZ: 4 LB. 2.7 OZ. -
Page 7: Km-660M_J(Z)
HI - 467PSI LO - 250PSI HI - 467PSI HI - 467PSI LO - 250PSI LO - 250PSI Refrigerant 404A 1 LB. 9.8 OZ. 404A 15.2 OZ. R404A Total Refrigerant Charge with Hoshizaki Remote Condenser Unit URC-5FZ: R404A 4 LB. 2.7 OZ. -
Page 8: Dimensions/Connections
B. Dimensions/Connections 1. Air-Cooled Models (MAJ) Units: mm [in.] Rear Side Bottom NOTICE • Allow 6" (15 cm) clearance at rear, sides, and top for proper air circulation and ease of maintenance and/or service should they be required. • The storage bin opening must match the bottom opening as in the illustration. -
Page 9: Water-Cooled Models (Mwj)
2. Water-Cooled Models (MWJ) Units: mm [in.] Rear Side Bottom NOTICE • Allow 6" (15 cm) clearance at rear, sides, and top for proper air circulation and ease of maintenance and/or service should they be required. • The storage bin opening must match the bottom opening as in the illustration. -
Page 10: Remote Models (Mrjz)
3. Remote Models (MRJZ) Units: mm [in.] Side Rear Bottom NOTICE • Allow 6" (15 cm) clearance at rear, sides, and top for proper air circulation and ease of maintenance and/or service should they be required. • The storage bin opening must match the bottom opening as in the illustration. -
Page 11: Remote Condenser Unit Urc-5Fz (Use With Km-520Mrjz Or Km-660Mrjz)
4. Remote Condenser Unit URC-5FZ (use with KM-520MRJZ or KM-660MRJZ) Units: mm [in.] Rear NOTICE URC-5FZ Heat of Rejection Icemaker AT 90°F (32°C) Allow 24" (61 cm) clearance at front Model WT 70°F (21°C) and rear for proper air circulation and... -
Page 12: Installation And Operating Instructions
II. Installation and Operating Instructions WARNING • The icemaker must be installed in accordance with applicable national, state, and local codes and regulations. • Failure to install, operate, and maintain the icemaker in accordance with this manual will adversely affect safety, performance, component life, and warranty coverage and may result in costly water damage. -
Page 13: Checks Before Installation
• NOTICE! Remote models must be connected to an appropriate remote condenser unit. The remote condenser units listed below are recommended. Connection to a different remote condenser unit will void the warranty unless Hoshizaki approves a different remote condenser unit for your specific application. For further details, contact your local Hoshizaki distributor. -
Page 14: Setup
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. -
Page 15: Electrical Connection
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, fire, or damage. •... -
Page 16: Water Supply And Drain Connections
• External filters, strainers, or softeners may be required depending on water quality. Contact your local Hoshizaki Certified Service Representative or local Hoshizaki distributor for recommendations. • A plumbing permit and services of a licensed plumber may be required in some areas. - Page 17 1. Icemaker Icemaker Water Minimum Icemaker Icemaker Drain Minimum Icemaker Condensation Supply Inlet Water Supply Line Size Outlet Drain Line Size Drain Outlet 1/2" Female Pipe 1/4" Nominal ID 3/4" Female Pipe 3/4" Nominal 3/8" OD Hard Thread (FPT) Copper Water Tubing or Thread (FPT) ID Hard Pipe or Tube...
- Page 18 2. Water-Cooled Condenser a) Connection to an Open Drain System Condenser Water Minimum Condenser Condenser Drain Minimum Condenser Supply Inlet Water Supply Line Size Outlet Drain Line Size 1/2" Female Pipe 1/4" Nominal ID Copper 3/8" Female Pipe 1/4" Nominal ID Hard Pipe Thread (FPT) Water Tubing or Equivalent Thread (FPT)
- Page 19 b) Connection to a Closed Loop System Condenser Water Minimum Condenser Condenser Minimum Condenser Supply Inlet Water Supply Line Size Return Outlet Return Line Size 1/2" Female Pipe 1/4" Nominal ID Copper 3/8" Female Pipe 1/4" Nominal ID Copper Thread (FPT) Water Tubing or Equivalent Thread (FPT) Water Tubing or Equivalent...
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Page 20: Remote Condenser Unit Installation
G. Remote Condenser Unit Installation WARNING • Installation of remote condenser unit must be performed by properly trained and EPA-certified service personnel. • The remote condenser unit must be installed in accordance with applicable national, state, and local codes and regulations. •... -
Page 21: Checks Before Installation
Liquid Charge Adjustment Discharge Discharge Icemaker Unit Line Line Adjustment Line Line (R-404A) KM-520MRJZ URC-5FZ 1/4" 3/8" OD 3/8" 1/2" OD Add 16.5 oz. (468 g) KM-660MRJZ Applicable to compensate for larger diameter line sizes, then add 0.4 oz. (11 g) for each... -
Page 22: Line Set Installation
5. Line Set Installation WARNING • R-404A itself is not flammable at atmospheric pressure and temperatures up to 176°F (80°C). • R-404A itself is not explosive or poisonous. However, when exposed to high temperatures (open flames), R-404A can be decomposed to form hydrofluoric acid and carbonyl fluoride both of which are hazardous. - Page 23 4) Braze the liquid line copper tube to the straight copper tube and the straight copper tube to the icemaker liquid line service valve. NOTICE • Before brazing, remove the Schrader valve cores from the service valve access ports. • When brazing, protect the service valve by using a wet cloth to prevent the service valve from overheating.
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Page 24: B) Line Set Greater Than 66' (20 M) Up To A Maximum Of 100' (30.5 M)
b) Line Set Greater Than 66' (20 m) Up to a Maximum of 100' (30.5 m) 1) Route the factory line set or appropriate size copper tubing. When field fabricating, insulate the copper tubes separately. Leave a service loop behind the icemaker to allow the icemaker to be pulled out for service. - Page 25 15) After evacuation, add the appropriate amount of additional R-404A. See "II.G.4 Line Set Size and Refrigerant Charge" for details. Hoshizaki Technical Support is available at 1-800-233-1940 for recommendations. 16) Close both gauge manifold valves. 17) Open the icemaker service valves first, then open the remote condenser unit service valves.
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Page 26: Electrical Connection
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, fire, or damage. • To reduce the risk of electric shock, make all remote condenser unit connections before connecting the icemaker power supply. -
Page 27: Stacking Remote Condenser Unit
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. -
Page 28: Final Checklist
H. Final Checklist 1. Pre-Startup 1) Is the icemaker level? 2) Is the icemaker in a site where the ambient temperature is within 45°F to 100°F (7°C to 38°C) and the water temperature within 45°F to 90°F (7°C to 32°C) all year around? 3) Is there at least 6"... -
Page 29: Post-Startup
2. Post-Startup 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. • Confirm that all internal and external connections are free of leaks. 1) Has the bin control been set to the proper setting for the application? 2) Has the bin control operation been confirmed? 3) Are all components, fasteners, and thumbscrews securely in place? -
Page 30: Startup
2) Confirm the correct control board bin control setting required for your application and adjust as detailed below. Application Bin Control Setting Reference Standard Ice Storage Bins (Factory Default) Hoshizaki DB and DM Dispensers See Fig. 14 Coca-Cola Freestyle Dispensers ® Non-Hoshizaki Dispensers Measurement Required See Fig. - Page 31 For Standard Ice Storage Bins, Hoshizaki DB and DM Dispenser Units, and Coca-Cola Freestyle Dispenser Units ® Application Bin Control Ice Level Settings Shutdown Distance from Bin Control Lens Bin Control Setting (Restart is 4 in. (102 mm) below shutdown distance) Standard Ice Storage Bins 254 mm (10")
- Page 32 For Non-Hoshizaki Dispenser Units Bin Control Ice Level Settings Shutdown Distance From Bin Control Lens Bin Control Setting (Restart is 4 in. (102 mm) below shutdown distance) Do not adjust dispensers to this setting. 254 mm (10") (Factory Default) 305 mm (12") 406 mm (16")
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Page 33: Appliance Startup And Bin Control Check
2. Appliance Startup and Bin Control Check WARNING • All parts are factory-adjusted. Improper adjustments may adversely affect safety, performance, component life, and warranty coverage. • Make sure the icemaker has been installed as outlined in this manual and that the water supply is on. - Page 34 6) 1 min. fill cycle begins. Place an object 5" to 7" (127 to 178 mm) away from the bin control lens. See Fig. 17. 15 sec. later, the icemaker shuts down. Remove the object from the bin control lens. 30 sec. later, the icemaker restarts. For bin control shutdown times per cycle, see the table below.
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Page 35: Maintenance
III. Maintenance The appliance must be maintained in accordance with the instruction manual and labels provided. Consult with your local Hoshizaki Certified Service Representative about maintenance service. WARNING • Only qualified service technicians should service the appliance. • To reduce the risk of electric shock, do not touch the control switch or mode switch with damp hands. -
Page 36: Cleaning And Sanitizing Instructions
5) When the control board starts beeping (2 beep sequence), remove the front panel. Move the control switch to the "OFF" position. 6) Remove the front insulation panel, then pour 10.4 fl. oz. (308 ml) of Hoshizaki "Scale Away" into the water tank. Replace the front insulation panel. - Page 37 Sanitizing 10) Confirm the mode switch is in the "CLEAN" position, then move the control switch to the "ON" position (1 short beep occurs, then 3 seconds later 1 long beep occurs). Replace the front panel. The water tank drains and then fills. 11) When the control board starts beeping (2 beep sequence), remove the front panel.
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Page 38: Preparing The Appliance For Periods Of Non-Use
IV. Preparing the Appliance for Periods of Non-Use NOTICE • When storing the icemaker for an extended time or in sub-freezing temperatures, follow the instructions below to prevent damage. • To prevent damage to the water pump seal, do not leave the control switch in the "PUMP"... - Page 39 3. On water-cooled models, remove the water from the water-cooled condenser: 1) Make sure the power supply is off, then remove the front, top, and right side panels. 2) Close the condenser water supply line shut-off valve. If connected to a closed loop system, also close the condenser return line shut-off valve.
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Page 40: Disposal
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 certified service personnel. - Page 41 618 Hwy. 74 South, Peachtree City, GA 30269 USA (P) 770.487.2331 (F) 770.487.3360 hoshizakiamerica.com 1A6537-010...
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