MCAC-VTSM-2015-10 R410A All DC Inverter V5 X Series 50Hz
Installation 121
13.3.2 Indoor unit power supply wiring
Note:
Refrigerant piping system, signal wires between indoor units and outdoor units should be run together.
Power supply for all indoor units must be unified.
Do not put the signal wires and power wires in the same conduit; if power supply is less than 10A than a distance of over
300mm between conduits should be maintained, if power supply is between 10A to 50A than the separation distance should be
increased to 500mm.
13.4 Control system installation
The control line should be shielded wire. Using other wiring shall create signal interference, leading to malfunction.
The shielded nets at the two sides of shielded wires are either grounded, or connected with each other and jointed to the sheet
metal along to the earth.
Control wire could not be bound together with refrigerant pipeline and power wire. When power wire and control wire are run
parallel to each other they should be spaced a minimum of 300mm so as to prevent signal interference.
Control wire shall not form a closed loop.
Control wire has polarity, so be careful when connecting.
The shield net should be grounded at the outdoor unit wiring terminal. The inlet and outlet wire net of indoor communication wire
should be connected directly and cannot be grounded, and form open circuit at the shield net of final indoor unit.
13.4.1 Signal wire between outdoor unit and indoor unit
Signal wire of indoor/outdoor unit adopts 3-core shielded wire (≥0.75mm
2
, The signal wire is polarized and
must be connected correctly.
Leakage protector
Manual switch
Branch box
Indoor unit
1
9
2
10
3
11
4
12
5
13
6
14
7
15
8
16
Single-phase 220~ 50/60Hz
(P Q E)
(P Q E)
(H1 H2 E) (H1 H2 E) (H1 H2 E)
To closed end of shield wire
(open)
Group control
The indoor unit at the terminal of communication system should
parallel connect a resistor between portP and port Q.
P
Q
matching
resistor
All sheild terminals of shield wires should be
connected to communication terminal
Master unit Slave unit Slave unit Slave unit
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