Hello! I am writing from Europe country Bulgaria. I have another brand Ground source heat pump with direct expansion with capacity of 1 ton. The questions are: -I want to install it in a vertical drilling 36 meters of copper pipe -with what diameter of the copper pipes -In horizontal installation if not vertical will be 3/8 copper pipe -In horizontal mounting in some places see 30 meters 3/8 30 m 1/2 joined in the middle and a total of 60 meters Other photos evaporator and condenser are 3/8 copper pipe that goes from one end of the condenser and the other end into the evaporator and so few chains. Which is correct for this little machine?Links image GSHP 4 pages. http://forum.napravisam.bg/viewtopic.php?f=23&t=53274&sid=c5aac64820401dd0daf7177f763ad628