Outdoor Unit
Outdoor Unit
Outdoor Unit
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6.2 Refrigerant Pipe Connection6.2.1 Y Branch MethodExample : 5 Indoor <strong>Unit</strong>s connected: <strong>Outdoor</strong> <strong>Unit</strong>: 1st branch (Y branch): Indoor <strong>Unit</strong>sH 50mL150ml 40mh 15m➲ Total pipe length = A+B+C+D+a+b+c+d+e ≤ 300mLlHhLongest pipe length* Equivalent pipe lengthA+B+C+D+e ≤ 150mA+B+C+D+e ≤ 175mLongest pipe length after 1st branchB+C+D+e ≤ 40mDifference in height(<strong>Outdoor</strong> <strong>Unit</strong> ↔ Indoor <strong>Unit</strong>)H ≤ 50m(40m:<strong>Outdoor</strong> unit is lower than Indoor <strong>Unit</strong>s)**Difference in height (Indoor <strong>Unit</strong> ↔ Indoor <strong>Unit</strong>)h ≤ 15m• * : Assume equivalent pipe length of Y branch to be 0.5m, that of header to be 1m, calculation purpose• ** : Indoor <strong>Unit</strong> should be installed at lower position than the header9Installation
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