VRF 50/60Hz
Notes for installers
The power supply should be connected to the outdoor unit power supply terminals as shown in Figure 3-8.2.
8.3 Communication Wiring
Communication wiring design and installation should adhere to the following requirements:
0.75mm
2
three-core shielded cable should be used for communication wiring. Using other types of cable can lead to
•
interference and malfunction.
Indoor communication wiring:
•
The P Q E communication wires should be connected one unit after another in a daisy chain from the outdoor
•
unit to the final indoor unit. At the final indoor unit, a 120Ω resistor should be connected between the P and Q
terminals. After the final indoor unit, the communication wiring should NOT be continued back to the outdoor
unit – that is, do not attempt to form a closed loop.
The P and Q communication wires should NOT be grounded.
•
The shielding nets of the communication wires should be connected together and grounded. Grounding can be
•
achieved by connecting to the metal casing adjacent to the P Q E terminals of the outdoor unit electrical control
box.
102
Figure 3-8.1: Indoor unit power supply wiring
Single-phase 220~ 50/60Hz
Leakage protector
Manual switch
1
2
9
10
Figure 3-8.2: Outdoor unit 1-phase power supply terminals
Branch box
3
4
5
6
7
Indoor unit
1 1
12
13
14
15
8
16