INSTALLATION 0540
GMV5 COMPACT MULTI VRF UNIT
SERVICE MANUAL
(3) The insulation thickness of condensate water pipe: at least 10 mm;
should be at least 20mm; when the diameter of copper pipe is less than 15.9 mm, the thickness of insulation
material should be at least 15 mm.
3.4 Communication cable and control cable
Note:
For air conditioning units installed in places with strong electromagnetic interference, shielded wire must be
used as the communication cables of the IDU and wired controller, and shielded twisted pairs must be used as the
communication cables between IDUs and between the IDU and ODU.
① The communication wire between indoor unit and wire controller
Note: The following table shows the length (L) of the communication wire between indoor unit and wire
controller.
② The communication wire between indoor unit and outdoor (or indoor) unit.
If the diameter increases to 2×1mm
2
, the
length (L) should enlarge. But the length
(L) should be less than 1500m.
Note: The following table shows the length (L) of the communication wire between indoor unit and outdoor (or
indoor) unit, the sectional area of communication wire.L=L1+L2+
﹒﹒﹒
+Ln.
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