Installation Procedure
(2) Piping size
HBU-28CF03
HBU-28HF03
HBU-42CF03
HBU-42HF03
HDU-42CF03/H
HDU-42HF03/H
HDU-50HT03/H
HDU-42CH03/H
HDU-42CI03/H
HDU-42HK03/H
(3) Limitations for one way piping length and vertical height difference.
(4) Piping connection
Refrigerant piping
: http://splitoff.ru/tehn-doc.html