Help needed with homebuilt glycol beer cooler, capilary size and length

Hello everyone

I am hoping someone smarter than me can help me out.
I have built a home made glycol cooler much like this one. https://www.acbeverage.com/catalog/p…e-13-hp-air-75

it is using a dan foss compressor 1/3hp using 134a
it has a 1/2hp condenser with a variable speed fan.
it is using about 90 feet of 3/8 copper tube in a coil as the evaporator.
it has a tub of 50/50 glycol water that holds 3 gallons, the entire system holds about 4 gallons of 50/50

I need to get the glycol down to about -20f to send it to my ice beer tower.

I need to know what size and what length capillary tube is needed
and also how much refridgerant should I use.

if there is anyone out there that can help me out please let me know

Thank you.

P.s. I know that in the web page it says .054, @ 112″ but this is with a matching condenser. ie. 1/3hp compressor to 1/3 condenser

BUT my unit is 1/3 compressor to 1/2hp condenser. and I am un sure of the final bath temp in the one in the web page, this is why I need help.


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