7) Evacuation, Vacuum Pump and Refrigerant Charge [R404A]

Never allow the oil in the vacuum pump to flow backward. The vacuum level and vacuum pump may be the same as those for the current refrigerants. However, the rubber hose and gauge manifold to be used for evacuation and refrigerant charge should be exclusively for R404A.

8) Refrigerant Leak Check

Refrigerant leaks can be detected by charging the unit with a little refrigerant, raising the pressure with nitrogen and using an electronic detector. Do not use air or oxygen instead of nitrogen for this purpose, or rise in pressure as well as in temperature may cause R404A to suddenly react with oxygen and explode. Be sure to use nitrogen to prevent explosion.

[b] REFRIGERANT RECOVERY

The icemaker unit is provided with refrigerant access valves. Using proper refrigerant practices, recover the refrigerant from the access valves and store it in an approved container. Do not discharge the refrigerant into the atmosphere.

[c] EVACUATION AND RECHARGE

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

2)Turn on the vacuum pump. Open the service manifold valves. Never allow the oil in the vacuum pump to flow backwards.

3)Allow the vacuum pump to pull down to a 760 mmHg vacuum. Evacuating period depends on pump capacity.

4)Close the low-side valve and high-side valve on the service manifold.

5)Disconnect the vacuum pump and attach a refrigerant service cylinder to the high-side line. Remember to loosen the connection and purge the air from the hose. For air-cooled and water-cooled models, see the nameplate for the required refrigerant charge.

6)A liquid charge is recommended for charging an R-404A system. Invert the service cylinder and place it on scales. Open the high-side valve on the service manifold.

7)Allow the system to charge with liquid until the proper charge weight is met.

8)If necessary, add any remaining charge to the system through the low-side. Use a throttling valve or liquid dispensing device to add the remaining liquid charge through the low-side access port with the unit running.

9)Close the service manifold valves and disconnect the service manifold hoses.

10)Cap the access valves to prevent a possible leak.

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Hoshizaki KMD-410MAH Evacuation, Vacuum Pump and Refrigerant Charge R404A, Refrigerant Leak Check, Refrigerant Recovery
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KMD-410MWH, KMD-410MAH specifications

The Hoshizaki KMD-410MWH and KMD-410MAH are premier ice makers, designed for commercial establishments that require high-efficiency ice production. These units stand out for their advanced features and technology that cater to the diverse needs of restaurants, bars, and hotels.

One of the primary features of the KMD-410 lineup is its impressive ice production capacity. With a production rate of up to 410 pounds of cube ice in a 24-hour period, each model ensures a steady supply of ice, which is essential for businesses with high demand. The ice produced is in the form of clear, hard cubes, ideal for beverage cooling, cocktail preparation, and food presentation.

Both models showcase the unique Hoshizaki ice-making system, which employs a direct cooling method. This technology uses individual stainless steel evaporators to produce ice, resulting in more uniform cubes and less waste. The stainless steel construction contributes to the durability of the units, making them suitable for rugged commercial environments.

Energy efficiency is another hallmark of the KMD-410MWH and KMD-410MAH. These machines are designed with an energy-saving mode that reduces power consumption without compromising ice production. This is critical for businesses looking to minimize operational costs while maintaining high standards of service.

User convenience is prioritized in these models through features like the easy-to-clean design. The internal components can be accessed quickly, allowing for simpler maintenance and sanitation processes. Additionally, the built-in cleaning cycle aids in maintaining ice purity and preventing bacterial growth, which is essential for food safety.

The KMD-410MAH also includes an advanced monitoring system with indicators for water usage and ice levels. This feature allows operators to keep track of performance and make necessary adjustments, ensuring that the ice maker operates at peak efficiency.

For installation flexibility, both models can be paired with various storage bins and dispensers, adapting to the layout of any establishment. Furthermore, they can be equipped with optional filtration systems that enhance water quality, further improving the taste and clarity of the ice produced.

In summary, the Hoshizaki KMD-410MWH and KMD-410MAH ice makers are exemplary choices for any business that demands high-quality, reliable ice production. Their robust features, energy-efficient operation, and user-friendly design make them indispensable assets in the hospitality and foodservice industries.
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