The Service Sector The Service Sector 

Prepares for HFO Prepares for HFO

-1

Paul DeGuiseppi MACS Worldwi

Paul DeGuiseppi MACS Worldwi

Mary Koban, DuPont Fluoroproduc

Mary Koban, DuPont Fluoroproduc
Agenda

 HFO-1234yf Review 1234yf Review Service Differences Service Differences Technician Training Technician Training  Recovery/Recycle/Recharge Equ

Recovery/Recycle/Recharge Equ

 Storage and Handling Storage and Handling
HFO-1234yf Properties 1234yf Properties

Properties Properties 1234yf 134aPvap, MPa (25 , MPa (25oC) 0.677 0.665

Pvap, MPa (80 , MPa (80oC) 2.44 2.63

GWP (100 ITH) GWP (100 ITH) 4 1410

Toxicity Toxicity A-Low A-Low

Flammability Flammability Mild None

Temperature, oC

Vapor Pressure

REFPROP EquationOf State available

0

0.5

1

1.5

2

2.5

3

3.5

-40 -20 0 20 40 60 80 

134aHFO-

Pressure (MPa)

HFO-1234yf has vapor pressure, toxicitsimilar to R-134a, but has mild flammab
Servicing Differences Servicing Differences 

Some potential service differences for HFO Some potential service differences for HFO

 Service shops and technicians may need 

Service shops and technicians may need 

new equipment (flammability/product diffe

new equipment (flammability/product diffe

 Recovery/recycle/recharge equipment ery/recycle/recharge equipment Refrigerant identifiers Refrigerant identifiers Leak detection equipment Leak detection equipment

 HFO

-1234yf refrigerant system componen

1234yf refrigerant system componen

replaced with ones removed from a syste

replaced with ones removed from a syste

another type of refrigerant, or from a salva

another type of refrigerant, or from a salva

 Replacement evaporators should meet SAE J2

Replacement evaporators should meet SAE J2

 HFO

-1234yf is mildly flammable 1234yf is mildly flammable

 Precautions used with other fla Precautions used with other flammables (gaso

mmables (gaso

applicable to HFO able to HFO

-1234yf
Servicing Differences Servicing Differences 

Some potential service differences for HFO Some potential service differences for HFO

-

 Lubricants used with HFO Lubricants used with HFO

-1234yf systems 

1234yf systems 

different than those currently used different than those currently used

 Hybrid compressors, driven by high Hybrid compressors, driven by high

-voltage ele

voltage ele

equipped with hermetic mobile A/ equipped with hermetic mobile A/C systems, us

C systems, us

 Necessary to check oil requirements sary to check oil requirements

 Do

-it

-yourselfers may charge non yourselfers may charge non

-approve

approve

into HFO into HFO

-1234yf systems 1234yf systems 

 Result 

– refrigerant cross contamination refrigerant cross contamination

 Could cause system failure Could cause system failure and/or system misd

and/or system misd
Servicing Differences Servicing Differences

Typical OEM R-134a Label Proposed O

Additional InfoRefrigerant flamJ2845 Techniciaand Containmen
Servicing Differences Servicing Differences 

R-134a Valve Prop HFO-1234yf 

SAE J639 AC System Side Quick Connect

NOT FINALIZED
Servicing Best Pract

Servicing Best Pract

 In general, low lying areas, (such as work

shafts or cellar exits), may cause releaseto pool as it is heavier than air 

 Current regulations require work areas to be a

ventilated and extraction units switched on if a

 Refer to local, state and federal rules and reg

regarding ventilation.

 Care should be taken to avoid over-charg

refrigerant system. 

 Service technicians should not smoke or 

open flame present while working on refrcontaining systems
Technician Training per S

Technician Training per S

Service Related Service Related(1) Understand unique differences between R (1) Understand unique differences between R

-1234y

1234y

(2) Identification of unique fi (2) Identification of unique fittings/labels for each ref

ttings/labels for each ref

tank identification; tank identification;

(3) How to use refrigerant identification equipment; (3) How to use refrigerant identification equipment; 

(4) How to use leak detection equ (4) How to use leak detection equipment and/or fluo

ipment and/or fluo

identify leaks with each refrigerant; identify leaks with each refrigerant;

(5) System servicing practices (incl. proper recovery

(5) System servicing practices (incl. proper recovery

Safety and Environmental Related Safety and Environmental Related 

(6) Follow vehicle manufacturer (6) Follow vehicle manufacturer recommendations, t

recommendations, t

safety and minimize environmental impact usin

safety and minimize environmental impact usin

recovery, recycling and charging equipment; recovery, recycling and charging equipment; 

(7) Technicians must have a g (7) Technicians must have a good understanding of 

ood understanding of 

requirements defined in SAE J639. requirements defined in SAE J639.

OEM’s have requested this standard to provide similar basis for technician refrigerant training 
Technician Training per S

Technician Training per S

 Intent of J2845 is to provide su Intent of J2845 is to provide sufficient technician 

fficient technician 

highlight refrigerant handling differences highlight refrigerant handling differences
R/R/R Equipment R/R/R Equipment

-J2843

J2843 HFO-1234yf Recovery/Recycling/Recharging EqFlammable Refrigerants for Mobile Air-Conditioning SHighlights

• Machines’ internal components reduce/minimize • Machines will have additional cabinet ventilation • New hose connections will be required with HFO-• HFO-1234yf refrigerant cylinder color white with r

J639

• New equipment will prevent re-charge if system h• Machine has 2-step process

1. Vacuum Check

• Pull vacuum, check for decays• If system decays, will stop machine

2. Pressure Check

• If vacuum does not decay, will add 10• Monitor pressure, check for pressure • If the pressure decays, remaining 90% 

refrigerant will not be administered.
Recovery Equipment Recovery Equipment

-J28

J2851 HFO-1234yf Recovery Only Equipment for FlamRefrigerants for Mobile Air-Conditioning SystemsHighlights:

• Machines’ internal components reduce/minimize 

arcing/sparking 

• Machines will have additional cabinet ventilation • New hose connections will be required with HFO-

(J639)

• HFO-1234yf Refrigerant cylinder color- white with 

band per J639

• New equipment will prevent re-charge if system h

leak.

• Machine will RECOVER, even if there is a system 
Storage and Handling Info

Storage and Handling Inf

 HFO

-1234yf package options exis 1234yf package options exist for both dispos

t for both dispos

returnable containers returnable containers

Disposable packages limited to about 2 lb size Disposable packages limited to about 2 lb size

Current DOT regulations prohibit packaging flamm

39 disposable containers beyond 0.75 in 39 disposable containers beyond 0.75 in

3 interior vo

interior v

Returnable packages available in 2, 5, 10, 20 and 

Returnable packages available in 2, 5, 10, 20 and 

 Currently working with DOT to understand addition

Currently working with DOT to understand addition

disposable packaging options. disposable packaging options.

 Check with your local, state Check with your local, state or federal agencies, as 

or federal agencies, as 

multiple containers of refrigerant multiple containers of refrigerant may be subject to r

 may be subject to r

 Refrigerant should always be st Refrigerant should always be stored in a cool, dry 

ored in a cool, dry 

out of direct sunlight out of direct sunlight
Storage and Handling Info

Storage and Handling Inf

• 30 lb disposable containers

• Light blue package color

R-134a

• 30 lb return• White with 

Packages have about the same footprint, ie. They same floor space.

HFO-1

HFO-
Summary Summary

 To prepare for HFO To prepare for HFO-1234yf service 1234yf service 

technicians will need technicians will need.....

 New recovery/recycle/recharge or recovery New recovery/recycle/recharge or recovery-on

o

 New refrigerant identifier New refrigerant identifier New leak detection equipment New leak detection equipment  Assure adequate ventilation and follow flamm

Assure adequate ventilation and follow flamm

practices per loc practices per local, state and federal regulatio

al, state and federal regulatio

 Appropriate technic Appropriate technician training ian training
Thank You! Thank You!

Please contact us at Please contact us at....

 www.MACSW.org www.MACSW.org www.refrigerants.dupont.com www.refrigerants.dupont.com www.SmartAutoAC.com www.SmartAutoAC.com