Midea MV8M-160WV2N1 - Page 113

V8 Mini R410A VRF 50Hz
111
Part 3 - System Design and Installation
Table 3-8.1: Communication connection between ODU and IDUs
Indoor unit generation
Communication connection
type
Wire diameter
(mm
2
)
Length limitation (m)
All V8 indoor units and unified power
supply
M1 M2 / P Q
2х0.75
2000 / 1200
All V8 indoor units and separate power
supply
M1 M2
2х1.5
400
(1 repeaters are required)
All 3
rd
generation indoor unit or
3
rd
generation indoor unit + V8 indoor
units
P Q
2х0.75
1200
Once there is 2
nd
generation indoor unit
in the system
P Q E
3х0.75
1200
Figure 3-8.3: Example of indoor unit and outdoor unit communication line connection
8.3.1 The magnetic ring installation
For the system, the EMI effect of the communication line PQ (or PQE) can be improved by adding a magnetic ring. The
magnetic ring needs to be fixed with the communication line (it can be wound for two turns), and placed in the electric
control box and secured with a wire clamp.
The communication wires should be connected to the master outdoor unit terminals indicated in Figure 3-8.4 and Table
3-8.2.
Caution
 Communication wiring has polarity. Care should be taken to connect the poles correctly.
Figure 3-8.4: Master outdoor unit communication terminals
Table 3-8.2: Communication connections
Terminals
Connection
X Y E
Connect to centralized controller
P Q E
Communication connection between indoor units and
outdoor unit
M1 M2
HyperLink communication connection between indoor
units and outdoor unit
O A
Connect to digital energy meter
H1 H2
Reserved
Notes for installers
