Kaysun Amazon V, Инженерный справочник

Страница: 187 / 200

Amazon V
186
Ka
ysun Amaz
on V Engineering Da
ta Book
Figure 3-9.1: Outdoor unit power supply wiring
Figure 3-9.2: Indoor unit power supply wiring
Notes for installers
The 3-phase, 380-415V, 50 or 60Hz power supplyshould be connected to the outdoor unit power supply terminals as
shown in Figure 3-9.3.
Figure 3-9.3: Outdoor unit 3-phase power supply terminals
9.3 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 cablecan lead to
interference and malfunction.
▪ Indoor communication wiring:
▪ The P QE communication wires should be connected one unit after another in a daisy chain from the outdoor unit
to the final indoor unit as shown in Figure 3-9.4. 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 PQE terminals of the outdoor unit electrical control
box.
▪
Outdoor communication wiring:
▪ The H1 H2 E communication wires should be connected one unit after another in a daisy chain from the master
outdoor unit to the final slave outdoor unit as shown in Figure 3-9.4.
Figure 3-9.4: Communication wiring configurations– correct and incorrect examples
Master
unit
Slave
unit
Slave
unit
H1 H2 E H1 H2 E
P Q E
P
Q E
P Q E P Q E P Q E
Master
unit
Slave
unit
Slave
unit
P Q
E
P Q
E
H1 H2 E H1 H2 E
P Q E P Q E P Q E P Q E
Master
unit
Slave
unit
Slave
unit
H1 H2 E H1 H2 E
P Q E P Q E
P Q E
P Q
E
P Q
E
P
Q
120| resistor
between PQ