Lennox VEP034N432US User Manual page 18

4.2.6 Dimension of Pipe between Indoor Branch and IDU
Dimension of pipe between indoor branch and IDU should be consistent with the dimension of
indoor pipe.
Rated capacity of IDU C(kW)
14.0<C≤16.0
16.0<C≤28.0
NOTE: If the distance between IDU and its nearest branch is over 10m, then the liquid pipe of
IDU (rated capacity ≤5.0kW) shall be enlarged.
C≤2.8
2.8<C≤5.0
5.0<C≤14.0
Fig. 12
Gas pipe (mm)
Φ9.52
Φ12.7
Φ15.9
Φ19.05
Φ22.2
14
DC Inverter Multi VRF System
Liquid pipe (mm)
Φ6.35
Φ6.35
Φ9.52
Φ9.52
Φ9.52