which refrigeration in a plant if it isn't labelled?

[Benjimo]

Had an interesting question in a test at trade school today, just wondering if I chose the correct answer.

If a system is short of refrigerant and is not labelled what refrigerant its running on, what can you do to find out what refrigerant is in the system?
Any help would be greatly appreciated.
Cheers

[marc5180]

look at the expansion device/ compressor?

[Toosh]

Had an interesting question in a test at trade school today, just wondering if I chose the correct answer.

If a system is short of refrigerant and is not labelled what refrigerant its running on, what can you do to find out what refrigerant is in the system?
Any help would be greatly appreciated.
Cheers

Shut it down let it equalize to ambient temp then read your pt chart

[Benjimo]

Shut it down let it equalize to ambient temp then read your pt chart

Cheers, that was my answer, just never came across it before

[Toosh]

Cheers, that was my answer, just never came across it before

Us old farts got they`re uses :)