Printable View
QuadDamage,
Depending on in which country you live will determine what refrigerants are available to you. If you live in Canada, try HC-12a. Its very cheap and is about 25% more efficient than R134a. If not you can, use R404a, R407b, R507a or 407c. Any of these has a boiling point about 20 deg C lower than R134a (-26.1) For example R404a has a boiling point of -46.6C. This is a readily available refrigerant, used in large freezer units.
Won't changing the refrigerant kill the compressor?
Something to do with the oils being used for R134a that isn't compatible with different refregirants???
Nice I got my 2400+ AUIGB 0245 yesterday form newegg.. I still think this batch as some pretty good in it too..
@Entuscan - You'd have to make sure the refrigerant you choose is compatible with the compressor and the oil. Its not really a big deal to change the oil though.
Just checked the Danfoss site and it seems the compressor is only suited for r134a :(
Anyone heard of someone switching refrigerant with a prommy?
But boiling point is pressure dependant, so just refil it with lower pressure to decrease the boiling point and therefore the evap temp...Quote:
Originally posted by DoGMaN
QuadDamage,
Depending on in which country you live will determine what refrigerants are available to you. If you live in Canada, try HC-12a. Its very cheap and is about 25% more efficient than R134a. If not you can, use R404a, R407b, R507a or 407c. Any of these has a boiling point about 20 deg C lower than R134a (-26.1) For example R404a has a boiling point of -46.6C. This is a readily available refrigerant, used in large freezer units.
]JR[
As long as the Prom uses POE oil (polyolester) it should *work* with R404a. The problem is that due to the lower boiling point, its pressures at ambient are much higher than 134a, so the compressor might not be strong enough to even "compress" so to speak.Quote:
Originally posted by Entuscan
Just checked the Danfoss site and it seems the compressor is only suited for r134a :(
Anyone heard of someone switching refrigerant with a prommy?
Danfoss units are pretty strong though.
But the problem is as Entuscan said, they Prommy compressor will not take other refrigerants. You could always get a new compressor, but then you really have to mod it. It might not really be worth the money switching, unless you're a refrigeration specialist and are very good at such things.
There are a few compressors that are rated for only 134a that can take R404a. The Danfoss may be one of them. Who wants to risk $600? ;)
Ask tombman! :lol:Quote:
Originally posted by Hallowed
Who wants to risk $600? ;)
I have no idea if you can drop R404a into an R134a compressor. I have been told by my HVAC guy that most can handle either as they are very similar. I do have to agree with Hallowed though. Risking $600 for something that may help is probably not worth it. I do know that HC-12a can be used as a direct replacement for R134a. Its boiling point is about -34C. Its not available at all in the USA though.
If were gonna go building evaporators again, why not break out and build some reuseable LN2 systems? 8-)
DoGMaN, Hallowed and the rest:
Thanks for tips.
@ quad
Post your temps plz !
Thx