Hoshizaki SRH3 KM-2500SWH3, SRH/3 KM-2100SWH3, SWH/3 Brazing, Evacuation and Recharge R-404A

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2. Brazing

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.

•Do not use silver alloy or copper alloy containing arsenic.

1)Braze all fittings while purging with nitrogen gas flowing at a pressure of 3 to 4 PSIG.

Note: Because the pipes in the evaporator case are specially coated to resist corrosion, it is important to make connections outside the evaporator case when possible. If it is necessary to braze inside the evaporator case, use sandpaper to remove the coating from the brazing connections before unbrazing the components.

NOTICE

•Always install a new drier every time the sealed refrigeration system is opened.

•Do not replace the drier until after all other repair or replacement has been made.

Install the new drier with the arrow on the drier in the direction of the refrigerant flow.

•When brazing, protect the drier by using a wet cloth to prevent the drier from overheating. Do not allow the drier to exceed 250°F (121°C).

2)Use an electronic leak detector or soap bubbles to check for leaks. Add a trace of refrigerant to the system (if using an electronic leak detector), and then raise the pressure using nitrogen gas (140 PSIG). Do not use R-404A as a mixture with pressurized air for leak testing.

3.Evacuation and Recharge (R-404A)

1)Attach a vacuum pump to the system. Be sure to connect the charging hoses to both high and low-side refrigerant access valves.

IMPORTANT

The vacuum level and vacuum pump may be the same as those for current refrigerants. However, the rubber hose and gauge manifold to be used for evacuation and refrigerant charge should be exclusively for POE oils.

2)Turn on the vacuum pump. Open the gauge manifold valves, then open the high and low-side service valves. Never allow the oil in the vacuum pump to flow backwards.

3)Allow the vacuum pump to pull down to a 29.9" Hg vacuum. Evacuating period depends on pump capacity.

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Contents Superior Degree Reliability Hoshizaki AMERICA, INC Contents Page 100 Important Safety Information Additional Warning for Remote Models Air-Cooled Models SAH/3 Model Shown KM-1301SAH3Water-Cooled Models SWH/3/-M Model Shown KM-1301SWH3Remote Models SRH/3 Model Shown KM-1301SRH3Water-Cooled Models SWH/3 KMH ConstructionModel Shown KMH-2000SWH3 Model Shown KMH-2000SRH3 Diagram Water TankWater Supply KM-2500SRH3 Water Shutdown Bin Full Icemaker Off Ice Level Lowered Restart Sequence of Operation Flow ChartTo 1 -Minute Fill Cycle Control Board with Harvest Pump Timer Operation Harvest Pump Timer StartupService Diagnosis G Control Board without Harvest Pump Timer Diagnosis Page Page OFF Shutdown E and G Control Board Control Board with Harvest Pump Timer Diagnosis Page Page Page Every cycle After 2nd freeze cycle Shutdown G Control Board Control Board Check Control Correct LED Board Lighting SequenceBin Control Check Float Switch Check and Cleaning Float Switch CheckFloat Switch Cleaning Thermistor Check No Ice Production Diagnostic TablesNo Ice Production Possible Cause Freeze-Up Freeze-Up Possible Cause Harvest CycleLow Ice Production Freeze-Up Possible CauseFreeze Cycle Low Ice Production Possible Cause Long Harvest CycleLow Ice Production Possible Cause Long Freeze Cycle III. Controls and Adjustments Control Board Control Board LayoutControl Board Bin Control Switch Open LED yellow Part Number Alarm BuzzerK2 Connector S5 Dip Switch K5 black ConnectorLED Lights and Audible Alarm Safeties No. of Beeps Type of Alarm Every 3 secSequence Step Energized Time LEDs are On Components Min Max AvgControl Board Settings and Adjustments Default Dip Switch SettingsS5 Dip Switch S4 Dip Switch G Control BoardsHarvest Timer S4 dip switch 1 S4 Dip Switch Setting Time sec Inlet Water Pump-Out Timer S4 dip switch 3Valve Pump-Out Frequency Control S4 dip switch 5 Control Board 1st Pump-Out S4 Dip Switch Setting FrequencyS4 Dip Switch Setting Control BoardFactory Use S4 dip switch Freeze Timer S4 dip switch 9Control Board S4 Dip Switch Setting Pump Motor Time sec S4 Dip Switch Setting Time MinFloat Switch Selector S5 dip switch 1 G Control Board Control SwitchRefill Counter S5 dip switch 2 through 5 G Control Board Refrigeration Circuit Service Information IV. Refrigeration Circuit and Component Service InformationRefrigerant Recovery Brazing Evacuation and Recharge R-404APage Component Service Information ComponentWater Regulating Valve Adjustment water-cooled models Maintenance Schedule MaintenanceFrequency Area Task Remove the water from the icemaker water supply line VI. Preparing the Icemaker for Periods of Non-UseDrain the water tank Page VII. Disposal VIII. Technical Information Specification and Performance DataKM-1301SAH KM-1301SAH3 KM-1301SWH Electric & Water ConsumptionKM-1301SWH3 1770237 240KM-1301SRH with URC-14F KM-1301SRH3 with URC-14F 463192 214KM-1400SWH-M KM-1400SWH3-M 17001720 230KM-1601SAH 14622450 2281456 KM-1601SAH32610 241 KM-1601SWH257 KM-1601SWH3 12.8 a 5 Min. Freeze AT 104F/WT 80F 375 785213 KM-1601SRH with URC-22F Auxiliary Codes S-2 and Later 755352 207202 504247 781 KM-1601SRH3 with URC-22F Auxiliary Codes S-2 and Later KM-1900SAH 2480KM-1900SAH3 1859KM-1900SWH 18761850 1650KM-1900SWH3 18142137 239KM-1900SRH with URC-21F KM-1900SRH with URC-22F 18572500 328KM-1900SRH3 with URC-21F 19652680 332KM-1900SRH3 with URC-22F 2096 KM-2100SWH31794 KM-2100SRH3 with URC-22F 3210382 2702408 KM-2500SWH32174 KM-2500SRH3 with URC-23F 3780KMH-2000SWH 18212410 1464KMH-2000SWH3 KMH-2000SRH with URC-22F 19442570 307KMH-2000SRH3 with URC-22F Wiring Diagrams KM-1601SWH, KM-1601SRH, KM-1900SH, KMH-2000SHKM-2500SH3, KMH-2000SH3 Diagrams with Harvest Pump Timer Relays G Control Board Auxiliary CodeKM-1301SH3 Auxiliary Code T-0, U-0 KM-1301SH Auxiliary Code U-1 and Later and KM-1601SAH KM-1301SH3 Auxiliary Code U-1 and Later and KM-1601SAH3 KM-1400SWH-M KM-1400SWH3-M
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SRH/3 KM-1900SAH/3, SRH3 KM-2500SWH3, SRH3 KMH-2000SWH/3, SWH/3, KM-1301SAH/3 specifications

The Hoshizaki KM-1301SRH/3, KM-1301SWH/3, and KM-1301SAH/3 are advanced ice makers designed for commercial use, addressing a wide variety of needs in restaurants, hotels, and bars. These models are known for their efficiency, durability, and innovative technologies that ensure the production of high-quality ice.

One of the standout features of these units is their ability to produce a high volume of ice, reaching up to 1,300 pounds per day, which is crucial for establishments with heavy ice demands. The machines utilize advanced cooling technology, allowing for faster ice production and minimizing the time required to refill ice bins. This makes them ideal for busy settings where speed and efficiency are paramount.

The KM-1301 series employs a unique stainless steel exterior that not only ensures longevity and resistance to corrosion but also enhances the aesthetic appeal of any commercial kitchen or bar. The interior is designed for easy cleaning, helping to maintain hygiene standards vital for food safety.

These ice makers utilize the proprietary Hoshizaki Cubelet Ice system, producing small, chewy ice cubes that are perfect for various beverages and food displays. The advanced design of the ice-making mechanism ensures that ice is formed quickly and efficiently, reducing energy consumption. Additionally, Hoshizaki’s CycleSaver technology optimizes the production process by reducing the amount of water used, making these machines environmentally friendly.

Another characteristic is their self-diagnostic capability, which allows for real-time monitoring of unit performance and quicker troubleshooting, minimizing downtime. The built-in alerts notify operators of any issues or maintenance needs, ensuring that the ice-making process remains uninterrupted.

The KM-1301 series also provides user-friendly controls that allow easy adjustments and monitoring of ice production settings. This flexibility enables businesses to meet varying ice demands based on seasonality or special events.

In summary, the Hoshizaki KM-1301SRH/3, KM-1301SWH/3, and KM-1301SAH/3 ice makers are exemplary choices for commercial ice production. With their high output, durable design, energy efficiency, innovative technologies, and user-friendly features, they cater effectively to the rigorous demands of the foodservice industry while maintaining a commitment to quality and sustainability.
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