Pipe diameter selection problem

[judasfan]

Hi Guys, I have a problem with a VRF system - it's consisted of two 45kW outdoor units working in parallel. The calculation software says that the main pipes should be 38mm/22mm, but here in Bulgaria we don't have 38mm copper pipe! So the question is - should I use 35mm or 42mm pipe?! The pipe run will be 20m long, 15m in vertical and 5m horizontal. Thank you in advance for your help!

[HVACRAU]

Hi, I think you need give SST/Gas/Unit location

[judasfan]

Hi, I think you need give SST/Gas/Unit location

Sorry mate, could you be more specific?!

[D.D.KORANNE]

design conditions requd :

evaporating temp
condensing temp
refrigerant used
capacity of each compressor

BASED ON THE DATA THE PIPE SECTIONS CAN BE CALCULATED

[lowcool]

it does not matter,use what ever you can.


mmm 7/8 liquid