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A.Mortezania
18-06-2017, 09:19 PM
Dear Friends,

I have a question.
Suppose that we have an air-cooled condenser with 8 fans and we want to control discharge pressure by turning on/off condenser fans by pressure switch.

In this case for turning on or off sequence of fans are important ? or it is not important witch fan should be first or second or third one ?

Sincerely yours.

Tayters
18-06-2017, 09:53 PM
Looking at two fan systems it seems normal to have the fan near the condenser outlet to stay on and cycle the other one. Theory being the refrigerant leaving the coil might heat up a bit if you cycle the other fan or liquid might sit by the inlet to the condenser (so I've been told).
Saying that, AC with an inverter pack will keep the top fan running to cool the PCB and cycle the lower fan so kind of blows that theory out the water a bit.
So, for the purist fans near the outlet on, fan near the inlet cycled.

Cheers,
Andy.

FaultCode
18-06-2017, 11:04 PM
Found this semi-sales literature which explains methods and reasons of fan control...

http://bit.ly/2sg8cBI

Without arguing with Tayters this paper suggests keeping the fans at the inlet running to prevent thermal shock on the tubing.

A.Mortezania
20-06-2017, 07:36 PM
Found this semi-sales literature which explains methods and reasons of fan control...

http://bit.ly/2sg8cBI

Without arguing with Tayters this paper suggests keeping the fans at the inlet running to prevent thermal shock on the tubing.

Dear Faultcode,

Thanks form your and Tayters help.

I will read your literature and will say my opinion.

Sincerely yours.