Lennox VRF VEC027N432U User Manual page 14

4.2.3 Dimension of Pipe (Main Pipe) from ODU to the 1st Indoor Branch
Dimension of pipe from ODU to the 1st indoor branch will be determined by the dimension of
outdoor connection pipe.
Dimension of outdoor connection pipe.
Basic module
VEC027N432U
VEC034N432U
VEC042N432U
VEC048N432U
VEC055N432U
VEC060N432U
4.2.4 Selection of Indoor Branches
Select indoor branches according to the total capacity of downstream indoor units. If the capacity
exceeds that of the outdoor unit, capacity of outdoor unit prevails.
Fig 4.2.3.1
Pipe dimension
Gas pipe (mm)
Φ15.9
Φ15.9
Φ15.9
Φ15.9
Φ19.05
Φ19.05
Fig 4.2.4.1
10
DC Inverter Multi VRF System
Liquid pipe (mm)
Φ9.52
Φ9.52
Φ9.52
Φ9.52
Φ9.52
Φ9.52