R410A Technical Questions

What is Puron?
Both Puron and Suva 410A are marketing brands for ASHRAE R-410A refrigerant. Puron is Carrier Corporation's brand name and Suva 410A is the DuPont brand for R-410A. Both have the same chemical composition and can be used interchangeably.

Can R-410A be used to retrofit existing R-22 equipment?
NO! Because of the much higher discharge pressure and cooling capacity, R-410A should ONLY be used in equipment designed specifically for R-410A.

Do I need different service tools to work on R-410A systems?
Yes. Because of the higher pressure, you should use manifold gauge sets designed for R-410A. In addition, you should use a recovery machine and recovery tanks designed for the higher pressure of R-410A. Recovery tanks should be specified as DOT 4BA400 or 4BW400.

What type lubricant should be used with R-410A?
A high-quality POE (polyolester) specified by the compressor or system OEM.

Since R-410A is a high-pressure refrigerant, can I store it in the back of my service van like I did with R-22?
Yes, as long as the temperature does not exceed 125°F. This is the same guidance given for R-22 and other common refrigerants. However, you must realize that on a hot sunny day, the temperature inside a closed van or truck can exceed 125°F, so if you are storing any refrigerants in your vehicle, don't let the temperature get to 125°F.

Is R-410A a blend refrigerant?
Yes. It is a blend of HFC-32 and HFC-125 (50/50 wt%) that performs very much like a single component refrigerant.

Is PURON is different than R-410A?
R-410A is the same refrigerant whether it is called Puron, Suva 410A, Genetron AZ20, Forane 410A or Klea 66. Puron is Carrier's brand name for R-410A.

Is R-410A is more toxic than R-22?
The safety and toxicity characteristics of R-410A have been thoroughly studied by reputable companies and organizations around the world. They have concluded that R-410A can be handled safely when the proper protective equipment is used and when appropriate safety guidelines are followed. These safety practices are very similar to the practices that have been used with R-22 and other HFC and HCFC refrigerants. There is more information on this in the R-410A manual.

Is R-410A more dangerous because of its higher pressures?
The pressure of R-410A is significantly higher than R-22. This does not mean that R-410A, or equipment containing R-410A is unsafe. It does mean that technicians must use AC equipment; cylinders and service tools have been re-engineered to handle these higher pressures.

If you have a leak from an R-410A system, does the entire charge have to be replaced, or can the system be topped off?
Since R-410A acts very much like a single component refrigerant, any change in composition due to a leak is minimal. The system can be topped off, without removing the entire charge. There is no practical limit to the number of times a unit can be topped-off or the refrigerant recovered from a unit. However, we do recommend that all leaks be repaired before topping a system off. Excessive superheat is an indication of low charge, and the possibility of a leak in the system should be considered.


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