R1234yf Commercialization Meeting. Friday 6 February Hilton Anatole, Dallas TX Ward Atkinson, Chair, SAE Interior Climate Control Committee. New Standards. There are 18 new or revised SAE J Standards Covering: [16 are listed in this presentation] Service Equipment Recovery --- Charging
Friday 6 February
Hilton Anatole, Dallas TX
Ward Atkinson, Chair,
SAE Interior Climate Control Committee
It’s Important to note that development of these documents may result in changed wording and/or content
This SAE Standard applies to refrigerant used in motor vehicle passenger
air-conditioning (A/C) systems designed to use HFO-1234yf.
1. Scope—The purpose of this SAE Standard is to provide minimum performance and operating feature requirements for the recovery of HFO1234yf refrigerant to be returned to a refrigerant reclamation facility that will process it to the appropriate ARI 700 Standard or allow for recycling of the recovered refrigerant to SAE J2843 specifications by using J2843-certified equipment. It is not acceptable that the refrigerant removed from a mobile air-conditioning (A/C) system with this equipment be directly returned to a mobile A/C system.
The purpose of this Standard is to establish minimum requirements for handling of HFO-1234yf in the service environment.
This SAE Standard covers fittings intended for connecting service hoses, per SAE J2196, from Mobile Air- Conditioning Systems to HFO1234yf service equipment such as manifold gauges, vacuum pumps and air conditioning charging, recovery and recycling equipment.
This SAE Standard focuses on the determination of a CO2- and HFO1234yf concentration inside the vehicle cabin arising from a R744 or HFO1234yf Refrigerant circuit leakage
This SAE Standard is restricted to refrigeration circuits that provide air-conditioning for the passenger compartments of passenger and commercial vehicles. The purpose is to establish an industry standard for determine the refrigerant concentration in a vehicle compartment. For generation of a refrigerant level in the vehicle compartment an external refrigerant source is inserted into the HVAC-Module airflow to the passenger compartment. The measurement shall cover vehicle compartment design boundaries, possible usage of the vehicle and the refrigerant system. The test procedures for measurement and the best practice for usage of this procedure shall be described.
This SAE Standard provides an enumeration of standards, in which processes and methods are described to prove the compliance of the safety measures for complex technical systems. According these standards the safety requirements for the alternative refrigerant vapor compression systems have to be verified for the entire lifecycle of the vehicle. This SAE Standard Practice is restricted to alternative refrigerant vapor compression systems that provide air-conditioning for the passenger compartments of passenger and commercial vehicles.
This standard describes a vehicle AC system with alternative refrigerants in design, production and assembly, operation and final scrapping. Service aspects are discussed in various SAE J-standards.
Methods to prove the compliance of the safety measures and devices with the safety requirements are described. This standard focuses on requirements and does not demand nor suggest concrete solutions.
Mobile air conditioning systems using any refrigerant that is toxic (list spec) or has an ISO 817 flammability classification of A2L or ASHRAE flammability classification of 2 in a direct expansion refrigerant system, shall meet the requirements of this standard. This standard along with other appropriate SAE J Standards provide design guidelines for an evaporator(s) using this type of refrigerant in a mobile air conditioning system.
1. Scope—Technician training and certification is required to ensure safe, efficient and effective service and repair of mobile air conditioning systems using R744, HFC-152a and HFO-1234yf. The technician must be trained to recognize which refrigerant is being handled, be trained to handle it safely and be equipped with the essential information, proper equipment and tools, which may be unique to a single refrigerant. This standard outlines minimum content requirements for such training programs.
This SAE Standard Practice is restricted to commercial vehicle passenger compartments. This document provides design standards and safety for these systems. Also included are cautionary statements for the mobile air conditioning service industry to alert service technicians to the inadvisability and the possible health and safety effects associated with venting refrigerant during service. It is not intended to restrict the use, or further development, of other types of refrigeration systems for passenger compartment cooling. Should other systems be found practical, this document may be amended or an additional standard safety practice created for such systems. This document addresses only CFC-12 (R-12), HFC-134a (R-134a), HFC152a (R-152a) and HFO1234yf flammable gas(s), and carbon dioxide (R-744) refrigerants. To prevent system contamination all refrigerants used in mobile air conditioning vapor compression systems require unique service fittings. The unique service fittings eliminate the potential for system refrigerant cross-contamination during service activity.
This SAE Standard applies to Carbon Dioxide R744 refrigerant used to service motor vehicle passenger air-conditioning (A/C) and heat pump systems designed to use R-744. R-744 when used as a refrigerant in mobile air-conditioning systems shall contain an odorant as an identification of refrigerant leaking from the system. Carbon Dioxide (R-744) and R134a used as refrigerants in Mobile Air-Conditioning Systems are not interchangeable. Refrigerants must not be mixed together
This SAE Standard covers fittings, couplers, and hoses intended for connecting from Mobile Refrigerant Systems to refrigerant removal and charging equipment. (Figure 1)
This fitting is physically different in size and connection thread type from current known fittings used in R-12 or R-134a service equipment or mobile refrigerant systems. It is a known standard type of fitting which provides the strength required for safe handling of high pressure gases. Its size difference will also reduce the potential of cross-threading service hoses on R-12 and R-134a refrigerant storage containers and service equipment.
The hose shall be designed to minimize permeation of refrigerants and contamination of refrigerant passing there through and to be serviceable over a temperature range of -30 to 95°C (-22 to 203°F). Hose working pressure shall be at least 13.2 MPa (Low-Side) respectively 17.6 MPa (High-Side) for R744. The minimum burst pressure shall be at least 2 times the maximum pressure. The hose has to work with R744, PAG-Oil and R744 Odor with an odor concentration of 250ppm in the refrigerant.
The purpose of this Standard is to establish minimum requirements for handling of R744 (CO2) in the service environment.
The purpose of this SAE standard is to provide equipment specifications for the controlled removal, evacuation and charging of R744 refrigerant for mobile refrigerant systems. System charging and service is challenging due to high pressures. Recovery of used R-744 is not required. This SAE standard is required for equipment used to service automobiles, light trucks, and other vehicles with similar R-744 refrigerant systems.
This SAE Standard is restricted to R744 refrigeration circuits that provide air-conditioning for the passenger compartments of passenger and commercial vehicles. The purpose is to establish an industry standard for electronic probe-type leak detectors intended for use in automotive air conditioning systems with R744 refrigerant. This includes design and performance criteria, test procedures for the apparatus and the best practice for usage.
The detector shall be used to find in R744 system circuits the sources of leaks of the sizes listed in Section 3. This iteration is intended for research and development, possible use on a system or vehicle production (assembly) lines, and by service technicians on production vehicles.
This SAE standard applies to fluorescent leak detection dyes and the corresponding injection equipment or other methods of installing the dye which are to be used when servicing a mobile air-conditioning system's refrigerant circuit for the purpose of allowing the application of fluorescent leak detection. Dyes should also work with R744 [CO2] refrigerant with odorant added.