Quote:
Originally Posted by SD1too
Hi Alan,
I'm assuming that by "original" you mean R134a and by "new" you mean R1234yf.
I've done a quick search and it's said that R1234yf is a "drop in" replacement for R134a, meaning that no changes are necessary. It may be that a minor adjustment is made to the charge but I believe that it will still be determined by weight. As SWorks says, the automatic machines contain a bottle of refrigerant sitting on a set of scales which isn't visible to the observer.
Simon
|
The later R1234yf isn’t compatible with the earlier R134a systems and the pipe connections are different so you can’t connect to the machine. The machine I use has two bottles, a larger one for R134a and a smaller one for R1234yf and both sit on scales. There is one high and one low pressure pipe with quick release connectors to change the connectors to the appropriate system. If you go from one gas to the other the machine carries out an internal cleaning process. If R134a became obsolete could you vacuum the system and add R1234yf via the R134a connectors? I’m not sure, possibly........
__________________
.................................................
'Marmite' Possibly one of the most famous 75 tourers produced! left the production line as the last of only Three Rover 75 tourers produced in Trophy Yellow. 48 hours later Longbridge closed. The last sold ordered 75 Tourer. Paid for by the Phoenix Four and handed over by John Towers to the Warwickshire Northampton Air ambulance service as a Rapid Response vehicle