ENGINEERING CHANGE NOTICEEXTENSION OF USE OF EMBRACO LBP R404A COMPRESSORS TO R448A/R449A

1. GeneralRegulation (EU) No. 517/2014 on fluorinated greenhouse gases (EU F-gases regulation)is limiting use of refrigerants with high GWP values (GWP – Global Warming Potential).
Nidec GA / Embraco offers a full product line of HC (Hydrocarbons) compressors asa final solution to meet EU F-gases regulation. A series of intermediate GWP blends wereproposed in order to bridge the transition to the final situation.
Nidec GA / Embraco has already approved:- R452A as an alternative refrigerant for both LBP (low back pressure) and MBP (mediumback pressure) applications maintaining the original R404A operating envelope(ECN R452A 2016).
- R448A and R449A as alternative refrigerants for MBP applications with restricted
operating envelope (ECN R448A 2019 and ECN R449A 2018).
Nidec GA / Embraco further evaluated limits to operate compressor platforms withrefrigerants R448A/R449A for LBP applications resulting in declaration described in Item
2. The main physical properties are indicated in the table below:Parameter

R 404A

R448A

R449A

HFC blend

HFC blend

HFC blend

A1A1

A1

Boiling Temp @ 1atm

-47 °C (-53 °F)-45 °C (-49 °F)-46 °C (-51 °F)

Critical Temp

72 °C (162 °F)

84 °C (183 °F)

82 °C (180 °F)

Temp Glide Bubble-Dew @1 bar(abs)

0.8 K

6.3 K

6.1 K

GWP (100y)

3920

1386

1397

Type
Safety Class

2. Declaration
Nidec GA / Embraco approves R448A and R449A as alternative refrigerants forEmbraco R404A compressor series NEU, NT, NJ and NJX for LBP application witha limitation of operating envelope defined in Figure 1. considering max 10Kof superheat.
It is important to respect this restricted envelope while operating the compressor
with R448A / R449A to guarantee its reliable operation because of a much higher
thermal profile. Operation outside the restricted envelope may lead to shorter
compressor life time or serious damage.
Please contact our Technical Support for further instructions.

ECN R448A/R449A LBP 2020, Embraco Slovakia

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ENGINEERING CHANGE NOTICEEXTENSION OF USE OF EMBRACO LBP R404A COMPRESSORS TO R448A/R449A

Electrical components are the same as originally defined for R404A. The compressor unit
label and nomenclature will not change. Safety compliance has to be performedon the complete appliance.
NEU / NT / NJ / NJX series: LBP (R448A / R449A) - Superheating 10K
70

original LBP R404A envelope, RGT 20°C
restricted LBP R448A/R449A envelope, Superheating 10K
60131F

Cond Temp °C

50104F403068F

20-40F-27F-10F

14F

10-50-45-40-35-30-25-20-15-10-50Evap Temp ºCFigure 1. Limited LBP operating envelope R448A / R449A
for Embraco R404A series NEU, NT, NJ, NJX; valid for superheating 10K

NOTE1:The requested reduction of superheating in the appliance can potentially result in occurrenceof liquid returning back to the compressor. Further countermeasures shall be taken in thefinal appliance to prevent these situations and avoid any impact on compressor life time.
NOTE2:For application of models NJ2212GK, NEU2178GK, NEU2168GK CSIR and NEU2155GK
CSIR (all 220-240V 50Hz), please contact Embraco Technical Support.
NEK LBP R404A models did not pass approval criteria and shall not be usedwith R448A/R449A.
Manufacturing site: Embraco Slovakia, s.r.o., Spisska Nova Ves, SLOVAKIAECN R448A/R449A LBP 2020, Embraco Slovakia

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