Lennox VRF VEC027N432U, User Manual, Page: 10 / 36

DC Inverter Multi VRF System
6
If the ODU is totally surrounded by walls, please refer to the following figures for space
dimension:
Fig 3.2.1
3.3 Piping Work Requirements
Refer to the table below for piping work requirements:
R410A Refrigerant System
Outer diameter (mm/inch) Wall thickness (mm)
Φ6.35(1/4) ≥0.8
Φ9.52(3/8) ≥ 0.8
Φ12.70(1/2) ≥ 0.8
Φ15.9(5/8) ≥ 1.0
Φ19.05(3/4) ≥ 1.0
4 Installation Instruction
NOTE! Graphics here are only for reference. Please refer to actual products. Unspecified
dimensions are all in mm.