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NEWS


FETA warns against A2L for retrofit


r retrofit F


ollowing recent instances in which R410A has been completely removed from an air conditioning system and the system simply recharged with R32, FETA has issued a warning against this practice.


ollowing recent instances in


which R410A has been completely removed from an air conditioning


system and the system simply recharged with R32, FETA has issued a warning against this practice.


R410A, classified as A1, non- flammable and R32, classified as A2L, low flammability, differ considerably in terms of their properties, meaning that direct retrofit using R32 is a cause for serious concern.


R410A, classified as A1, non-


direct retrofit usin terms of their properties, low flammability, differ co 3,


FETA has noted that a number of points must be considered:


points must be considered FETA has noted that a .


serious concern number of d:


 Refrigerant manufacturers have clearly stated that A2L refrigerants are not suitable for retrofit.


Refrigerant manufacturers have clearly stated that A2L refrigerants are not suitable for retrofit.


 A system that was origiinally designed for R410A will not have taken into account the safety factors required when usin


could create a si ificangn g an A2L refri


hazard.


igerant and nt safety


A system that was originally designed for R410A will not have taken into account the safety factors required when using an A2L refrigerant and could create a significant safety hazard.


Systems designed for use with R32 have different pressure switch regimes, altered inverter profiles, and specially designed heat exchangers.  Charging an existing system with


Systems designed for use with R32 have different pressure switch regimes, altered inverter profiles, and specially designed heat exchangers. Charging an existing system with


flammable and R32, classified as A2L, onsiderably in meaning that


g R32 is a cause for s n


FETA warns against A2L for


R32 would leave the system non- compliant with the refrigerant safety standard EN378, leading to the possibility of forming a flammable atmosphere in a leakage situation.  Such a refrigerant change would be strictly against the system manufacturer’s instructions, and, would render any relevant warranty i invalid. It would also mean that the system would no longer be compliant with its original CE marking or the Pressure Equipment Directive specifications, and could have insurance implications.


R32 would leave the system non- compliant with the refrigerant safety standard EN378, leading to the possibility of forming a flammable atmosphere in a leakage situation. Such a refrigerant change would be strictly against the system manufacturer’si structions, dan would render any relevant warranty nvalid. It would also mean that the system would no longer be compliant with its original CE marking or the Pressure Equipmen specification


a a


insurance impl s,


ications. and could have t Directive


 R32 has a higher compressor discharge temperature than R410A, and will increase wear on the compressor, reducing its life significantly.


 Should any problem arise from a system change


system change such as this, any liability would rest entirely with theliability would person who car


person who carried out the change. ge.


It is not good practice to charge a system with a refrigerant for which it was not originally designed, anditis strongly discouraged.


a


It is not good practice to charge a system with a refrigerant for which it was not originally designed, and it is strongly discouraged.


rried out the chan rest en irely with the


R32 has a higher compressor discharge temperature than R410A, and will increase wear on the compressor, reducing its life significantly. Should any problem arise from a e such as this, any t


Testo


BESA appoints new chief executive


D


avid Frise has been appointed as the new chief executive officer of


vid Frise has been


the Building Engineering Services Association (BESA).


the Building Engineerin Association (BESA).


appointed as the new chief executive officer of ng Services


He has been combining the roles of head of sustainability at BESA and chief executive of the construction fit-out body FIS for seven years. He takes over as chief executive of BESA with immediate effect, but will also continue in his role at the FIS for a short period to help manage the transition with his successor. A former nuclear submariner, he left the Royal Navy to become managing director of a building engineering services contractor,


He has been combining the roles of head of sustainability


ty at BESA and


chief executive of the construction fit-out body FIS for seven years. He takes over as chief exec


the FIS for cessor. cutive of BESA


with immediate effect, but will also continue in his role at t


ashort period to helpmanage the transition with his succ


A former nuclear submariner, he left the Royal Navy ty to become managing director of a building engineering services contractor,


which he described as a logical step. Mr Frise is a frequent speaker on a range of industry topics, including energy efficiency, system integration, government policy and the ‘performance gap’ in buildings. The BESA Board gave unanimous backing to the appointment, stating that Mr Frise had the required track record and the necessary political, technical and management qualities.


which he described as a logical step. Mr Frise is a frequent speaker on a range of industry topics, including energy


y efficiency, system


integration, government policy and the ‘performance gap’ in buildings. The BESA Board gave unanimous


that Mr Frise had e ap


backing to th


ppointment, stating g


dth e required track


record and the necessary political, technical and management qualities.


www.acr-news.com www.acr-news.com m


www.testo.co.uk April 2018 11


BESA appoints new chief executive


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