From: Stefano Vit [mailto:stefano.vit@delonghigroup.com] 

Sent: Tuesday, October 21, 2014 11:47 AM 

To: Sheppard, Margaret 

Cc: Hall-Jordan, Luke; Newberg, Cindy 

Subject: De Longhi: feedback meeting 26th September 

Dear Ms. Scheppard, 

I thank again you and your department for the availability to meet on the 26th September for 

discussing about natural refrigerants. It has been a really interesting meeting for me. 

I write you for providing the additional information request by you during the meeting. Please 

find hereafter these information. 

Recently a new proposal restricting the usage of flammable refrigerants for UL 484 has been 

circulated for comment. As you can image we are opposing to this proposal. 

I hope you will find useful the additional information reported hereafter in order to support the 

approach currently present in IEC, EN and UL standard for flammables. 

I'm at your disposal for any further information you may need on this issue. 

Thanks in advance 

Best regards 

Stefano Vit 

Complementary note to file “Dispersion_test_effect_ventilation_and_leak_time.pdf”:

Some considerations are reported hereafter in order to underline that test assumptions are 

referring to a worst case scenario compared to the one considered into IEC 60335-2-40 Ed. 5. 

More in detail: 

- according to IEC 60335-2-40 Ed.5 for propane max charge is 300 gr (linear formula for nonfixed hermetically sealed systems). In the test up to 325 gr where released (93% of total charge 

345 gr) which is a more severe scenario that the one allowed by the standard. 

This is even more true when considering that in case of leak (especially drastic) not all 

the charge is release to the room. The amount of refrigerant left within the system could 

be estimated to be close to 20% while in the test is was considered to be just 7%. 

- drastic release time in the test is 3 minutes while in the standard is 4 minutes. 

- fan was stopping after 3 minutes while according to the standard it has to be continuously 

running. 

A continuous running fan provide a more homogenous mixture. 

The previous considerations are provided with the purpose of underlying the over-cautions taken 

in the approach taken into the IEC and EN standard when considering natural refrigerants. 
 

 

Propane Efficiency

 

Propane has the advantage to enhance efficiency (around 10%) and provide a limited 

environmental impact. This can be duly represented when evaluating the TEWI impact of a 

product equipped with propane. It has to be noted that the charge with propane is around 60% of 

the charge with R410A. 

In Europe F-gas regulation have been recently approved after a revision (No. 517/2014) 

requiring moveable air conditioning products to be equipped with refrigerant with GWP ≤ 150 

 from 1 January 2020 

. 

This requirements is a consequence of an assessment on the benefit associated to the use of 

propane where both direct and indirect impact of a refrigerant circuit are minimized. 

A TEWI analysis has been conducted during the development of the Labelling and Ecodesign 

regulations in Europe. The results in relation to Single Duct air conditioners are proposed 

hereafter: 

From Figure 6-25 it is possible to evince the efficiency and low environmental impact of propane 

compared to R410A. 

 

 

De Longhi Dehumidifier with R290 for Japanese market.

 

With reference to the dehumidifier with R290 for Japanese market please find attached the copy 

of the S-JET certificate and the test report which is in accordance with the METI Standard. The 

product was sold 5-6 years ago. 

In the test report you will find same translations in English that are necessary because the whole 

report is written in Japanese. 

The product was developed according to the IEC 60335-2-40 before to start the approval 

procedure in Japan which has not implied any change on the product. 
Attached files: 

S-JET_Certificate_DE250ECO_Delonghi_R290_(S06-Y0557).pdf 

Test_Report_DE250ECO_DeLonghi_R290 (2007-06-25).pdf