R-410A: Special Handling Is Required

February 2, 2001
/ Print / Reprints /
/ Text Size+
More and more residential and light commercial air conditioning equipment is being built with HFC-410A instead of HCFC-22. The refrigerant is being made by several manufacturers under different brand names. All carry the ASHRAE number R-410A.

Contractors and technicians need to know that R-410A can only be used in equipment designed for R-410A. It cannot be used to retrofit existing R-22 equipment due to significantly higher operating pressures. Furthermore, special service equipment is required, such as a high-pressure manifold gauge set, a high-pressure recovery unit, and a high-pressure recovery tank.

Because of its enhanced properties, R-410A systems operate differently than R-22 systems.

Due to 410A’s higher pressure, most system components have been redesigned with increased wall thickness.

When servicing this equipment, make sure you use reversing valves, expansion valves, filter-driers, and other components specifically designed for R-410A.

In addition to increased wall thickness, the expansion valve flow area required to provide the same tonnage as R-22 will be about 15% smaller.

Common Questions

Where can I buy R-410A? All authorized distributors should have access to 410A. More than likely you will be servicing equipment with R-410. Therefore, you will want to both work with your distributor so that this refrigerant is stocked and to keep it on hand, as well to ensure you are prepared to handle these service calls when they come in.

What about the brands of R-410A? Puron® and Suva® 410A are marketing brands for ASHRAE R-410A. Puron is Carrier Corp.’s brand name and Suva 410A is the DuPont brand name. 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 for it.

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 unit and tanks designed for the higher pressure of R-410A. Recovery tanks should be specified as DOT 4BA400 or 4BW400.

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

Will R-410A systems have different components than R-22 systems? Yes. Because of the higher pressure for R-410A, most system components have been designed with increased wall thickness. In addition, expansion valves specifically designed for R-410A capacity should be used.

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

How should I charge R-410A? For optimum performance, R-410A should be removed from the cylinder as a liquid.

Bateman is senior engineer for DuPont Suva Refrigerants. For more information, contact DuPont at 800-235-7882 or www.suva.dupont.com.

Publication date: 02/05/2001

Did you enjoy this article? Click here to subscribe to The NEWS Magazine

You must login or register in order to post a comment.


luiz carlos ribeiro
December 27, 2009
tenho um equipamento (ar-split)que perdeu o gás 410 por vasamento, mandei corrigir e completar,não achei onde comprar o 410 ,entao o técnico colocou r22 há três meses atrás e está refrigerando bem até hoje. Mas agora achei onde comprar o gás 410 , e achei muito caro. onde posso comprar uma quantidade menor de gás?pois nao preciso da garrafa toda ou devo deixar o r22 ? Pois o técnico me falou que nao há problema nenhum ,por favor enviar pelo pelo meu email cr@furnas.com.br Agradeço desde já ,Luiz Carlos



Image Galleries

2014 MCAA Annual Convention

Scenes from the 2014 MCAA Annual Convention in Scottsdale, Ariz.


NEWSmakers: Julian Scadden

Training is an ongoing process. Julian will discuss how you can generate maximum return on time and energy invested training by following a three part process. Listen to this podcast to get expert tips on training, tracking and follow up. 

More Podcasts



NEWS 04-14-14 cover

2014 April 14

Check out the weekly edition of The NEWS today!

Table Of Contents Subscribe


Which statement on service calls best applies to your business?
View Results Poll Archive


2014 National Plumbing & HVAC Estimator

Every plumbing and HVAC estimator can use the cost estimates in this practical manual!

More Products

Clear Seas Research


Clear Seas ResearchWith access to over one million professionals and more than 60 industry-specific publications, Clear Seas Research offers relevant insights from those who know your industry best. Let us customize a market research solution that exceeds your marketing goals.


Magazine image
Register today for complete access to ACHRNews.com. Get full access to the latest features, Extra Edition, and more.


facebook icontwitter iconyoutube iconLinkedIn i con