Lennox VRF VEC027N432U, User Manual, Page: 12 / 36

DC Inverter Multi VRF System
8
Unit:mm
Model A B C D E
VEC027N432U
VEC034N432U
VEC042N432U 980 360 790 650 395
4.2 Connection Pipe
4.2.1 Schematic Diagram of Piping Connection
Fig.4.2.1.1
4.2.2 Allowable Length and Height Difference of Connection Pipe
Y type branch joint is adopted to connect indoor and outdoor units. Connecting method is shown
in the figure below:
NOTE! Equivalent length of one Y-type branch is 0.5m.
Piping parameters of VEC027N432U , VEC034N432U , VEC042N432U .
Allowable
value
Fitting pipe
Total length (actual length) of fitting pipe 250m L1+L2+L3+a+b+c+d
Length of farthest fitting pipe (m)
Actual length 100m
L1+L2+L3+d
Equivalent length 120m
From the 1 st branch to the farthest indoor pipe 40m L2+L3+d