Table 2. R410a Pressure/Temperature Chart

R410a

Temperature

Pressure

°F

psig

-15

31.3

-5

42.2

120418.0

150612.8

Component Considerations for R410a

Compressor

Wall thickness has increased with the increase of operat- ing pressures of R410a. The internal pressure relief valve setting has been increased from 375-450 psig for R22 to 550-625 psig for R410a. Although the discharge pressure is higher in R410a the discharge temperature should be lower due its higher vapor heat capacity. Desuperheating hot water generators must be designed around this lower hot gas temperatures as well. High pressure switches will now open at 600 psig ±10 psig and reset at 450 ±10 psig. The compressor oil must be polyolester (POE) based. Mineral oils should never be used. POE oils absorb

R410a Application and Service Guide

moisture VERY easily. For this reason any compressor using POE oil should only be exposed to ambient air for short periods of time during manufacture or service. See the service section of this manual for more information.

Condenser/Evaporator Heat Exchangers

The heat exchangers must be designed to have a working pressure above the 600 psig level. In some cases this can mean a thicker wall.

Filter Driers

Liquid filter driers must have working pressure of no less than 600 psig and be approved for use with R410a. A 100% molecular sieve with no activated Alumina is rec- ommended for maximum moisture removal. It is always required to install a new filter drier whenever the system is opened.

Suction line filter driers should only be used after a burn out and should be removed after an appropriate clean-up time.

Thermostatic Expansion Valves

R410a metering devices are about 15% smaller than R22 devices. The selective charge used in the bulb must be matched for R410a operation, therefore a TXV must be designed for R410A use. METERING DEVICES for R22 and R410a are NOT INTERCHANGEABLE.

Refrigerant Tubing

There are no general changes to the tubing other than the working pressure increase to 600 psig. Generally the lower refrigerant flow rate of R410a versus R22 does not result in any pipe diameter changes.

Polyolester Oils

POE oils are VERY hygroscopic. They readily absorb moisture and hold it. For this reason POE oils should be limited in their exposure to ambient air during manufacture or service. The lubricant should be exposed to ambient air for no more than 15 minutes. Always store POE oil in glass or metal containers. Pumps are recom- mended to move the oil from containers to the refrigera- tion system. If the system is under a vacuum, break the vacuum with refrigerant or dry nitrogen. It is never recommended to break the vacuum with air. Liquid line filter driers should be used to remove any moisture in the system. Charging system may also contain a replaceable filter drier for improved moisture removal. In summary:

•POE oil is hygroscopic and will readily absorb moisture

•Never store POE oil in plastic containers. Always use metal or glass

•Use a pump to transfer POE lubricants

•Use an approved POE lubricant. They arenʼt all interchangeable

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Heat Controller R410A manual Component Considerations for R410a
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R410A specifications

The heat controller R410A is a modern refrigerant that has gained significant popularity in recent years, particularly in air conditioning systems and heat pumps. As an environmentally friendlier alternative to older refrigerants, R410A is primarily composed of a blend of two hydrofluorocarbons (HFCs): R-32 and R-125. This combination offers several advantages, making it a preferred choice for both residential and commercial heating and cooling applications.

One of the main features of R410A is its high efficiency. This refrigerant operates at higher pressures than traditional refrigerants like R22. As a result, systems designed to use R410A can achieve higher cooling capacities and overall energy efficiency. This leads to better performance and lower energy consumption, which is beneficial not only for the environment but also for consumers seeking to reduce energy bills.

Additionally, R410A is designed to have a significantly lower ozone depletion potential (ODP) compared to older refrigerants. It has an ODP of zero, meaning it does not contribute to the depletion of the ozone layer, aligning with global efforts to protect the environment. Furthermore, R410A has a lower global warming potential (GWP) than many traditional refrigerants, which further enhances its reputation as an eco-friendly refrigerant option.

When it comes to technologies, R410A has been integrated into various heat pump and air conditioning systems, many of which utilize advanced inverter technology. This technology allows the compressor to adjust its speed according to the cooling or heating demand, optimizing energy consumption and enhancing comfort levels. Additionally, systems using R410A are often equipped with enhanced heat exchange surfaces, allowing for better heat transfer and overall system efficiency.

Another characteristic of R410A is its compatibility with modern lubricants, which improves system performance and reliability. These lubricants are specifically formulated to work effectively with R410A, ensuring that systems maintain optimal efficiency throughout their operational lifespan.

In summary, the heat controller R410A boasts a range of features, technologies, and characteristics that make it a leading choice in the HVAC industry. With its high efficiency, low environmental impact, and compatibility with advanced systems, R410A continues to play a pivotal role in modern heating and cooling solutions. As the industry moves toward greener alternatives, R410A stands out as a viable refrigerant option for the future.
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