Daikin HUBBARD HCU2040PXB1 Installation, Commissioning And Maintenance Manual page 13

Page 13 of 169
The incoming three phase is connected to the main isolator as shown below.
For HCU2040PXB1 unit an incoming cable size of not less than 2.5 mm 2 is recommended. However, cable run and
voltage drop need to be consinder.
10.1 Recom m ends for liquid & suction pipew ork
It is really important to ensure a good oil return on the compressor. Suggested connections for suction and liquid
line are shown below.
Industry recognised design standards for pipework sizing are to be followed. Horizontal and vertical (riser) suction
pipework sizing during full and part load conditions require design to ensure sufficient oil recovery and return to
unit
Copyright HPL March 2021 P4367 Rev 01