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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