Topping OFF System Charge, Safety Practices

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THESE UNITS REQUIRE R-410A REFRIGERANT AND POLYOL ESTER OIL.

GENERAL:

1.Use separate service equipment to avoid cross contamination of oil and refrigerants.

2.Use recovery equipment rated for R-410A refrigerant.

3.Use manifold gauges rated for R-410A (800 psi/250 psi low).

4.R-410A is a binary blend of HFC-32 and HFC-125.

5.R-410A is nearly azeotropic - similar to R-22 and R-12. Although nearly azeotropic, charge with liquid refrigerant.

6.R-410A operates at 40-70% higher pressure than R-22, and systems designed for R-22 cannot withstand this higher pressure.

7.R-410A has an ozone depletion potential of zero, but must be reclaimed due to its global warming potential.

8.R-410A compressors use polyolester oil.

9.Polyol Ester oil is hygroscopic; it will rapidly absorb moisture and strongly hold this moisture in the oil.

10.A liquid line dryer must be used - even a deep vacuum will not separate moisture from the oil.

11.Limit atmospheric exposure to 15 minutes.

12.If compressor removal is necessary, always plug compressor immediately after removal. Purge with small amount of nitrogen when inserting plugs.

TOPPING OFF SYSTEM CHARGE

If a leak has occurred in the system, Bard Manufacturing recommends reclaiming, evacuating (see criteria above), and charging to the nameplate charge. If done correctly, topping off the system charge can be done without problems.

With R-410A, there are no significant changes in the refrigerant composition during multiple leaks and recharges. R-410A refrigerant is close to being an azeotropic blend (it behaves like a pure compound or single component refrigerant). The remaining refrigerant charge, in the system, may be used after leaks have occurred and then “top-off” the charge by utilizing the charging charts on the inner control panel cover as a guideline.

REMEMBER: When adding R-410A refrigerant, it must come out of the charging cylinder/tank as a liquid to avoid any fractionation, and to insure optimal system performance. Refer to instructions for the cylinder that is being utilized for proper method of liquid extraction.

WARNING

Failure to conform to these practices could lead to damage, injury or death.

SAFETY PRACTICES:

1.Never mix R-410A with other refrigerants.

2.Use gloves and safety glasses, Polyol Ester oils can be irritating to the skin, and liquid refrigerant will freeze the skin.

3.Never use air and R-410A to leak check; the mixture may become flammable.

4.Do not inhale R-410A – the vapor attacks the nervous system, creating dizziness, loss of coordination and slurred speech. Cardiac irregularities, unconsciousness and ultimate death can result from breathing this concentration.

5.Do not burn R-410A. This decomposition produces hazardous vapors. Evacuate the area if exposed.

6.Use only cylinders rated DOT4BA/4BW 400.

7.Never fill cylinders over 80% of total capacity.

8.Store cylinders in a cool area, out of direct sunlight.

9.Never heat cylinders above 125°F.

10.Never trap liquid R-410A in manifold sets, gauge lines or cylinders. R-410A expands significantly at warmer temperatures. Once a cylinder or line is full of liquid, any further rise in temperature will cause it to burst.

Manual	2100-508
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W30A1, W18L1, W30L1, W36A1, W48A1 specifications

The Bard range of products, specifically the W24L1, W48L1, W42L1, W70A1, and W60A1 models, showcases advanced engineering aimed at providing efficient heating and cooling solutions. Each model comes with distinctive features and technologies tailored to meet various residential and commercial needs.

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The W42L1 model stands out for its versatility in both heating and cooling applications. It is engineered with high-efficiency components, which contribute to lower energy consumption. Features like programmable thermostats and variable speed fans enhance user comfort and adjust to varying demand. The W42L1 also comes with a durable construction, ensuring longevity and reliability even in challenging conditions.

For those demanding even higher performance, the W70A1 model caters to significant heating and cooling requirements. This unit is designed to tackle extreme weather conditions and is often favored for industrial applications. The W70A1 employs advanced heat exchanger technology, improving efficiency and reducing energy loss. Moreover, its rugged design enables operation in harsh environments without compromising performance.

Lastly, the W60A1 represents a harmonious blend of efficiency and power. It is particularly well-suited for mid-sized applications, combining the best features from the other models. The W60A1 integrates sophisticated microprocessor controls that optimize performance while ensuring compatibility with emerging smart technology platforms. Its energy-efficient design means lower operating costs while delivering impressive comfort levels.

In summary, Bard's W24L1, W48L1, W42L1, W70A1, and W60A1 models are engineered to deliver superior heating and cooling solutions across a variety of environments. With a focus on energy efficiency, advanced technologies, and user-friendly interfaces, these models exemplify Bard's commitment to innovation and sustainability in climate control systems.