Yuri B.
12-09-2011, 07:56 PM
Hello
I have seen a cool-only split (outsid unit) today which has a 3-way adapter added on its liquid line with connected presostat for fan control. The setpoint was 9 Bar, but what refigerant, I forgot to notice.
I am not sure, maybe the A/C contains an expansion device in the inside unit, although I doubt it. Then, such seemingly condensation P "regulation" is not wise on my view. If it is for a server room, what happens at low outside and high air room T ? The presostat will not stop the fan - so, no effect of it. Or at high outside T there is imaginable an intermediate P in the liquid line which would stop the fan untimely.
Probably lazy (or "economical" for the client) installers did not want to bother opening the system, brazing, vaccuming, etc. Or maybe the presostat is there for an other reason?
I have seen a cool-only split (outsid unit) today which has a 3-way adapter added on its liquid line with connected presostat for fan control. The setpoint was 9 Bar, but what refigerant, I forgot to notice.
I am not sure, maybe the A/C contains an expansion device in the inside unit, although I doubt it. Then, such seemingly condensation P "regulation" is not wise on my view. If it is for a server room, what happens at low outside and high air room T ? The presostat will not stop the fan - so, no effect of it. Or at high outside T there is imaginable an intermediate P in the liquid line which would stop the fan untimely.
Probably lazy (or "economical" for the client) installers did not want to bother opening the system, brazing, vaccuming, etc. Or maybe the presostat is there for an other reason?