Adaptors for Connection of Air Conditioners Si30-408
202 Appendix
Connection to
indoor unit
Use the relay harnesses (1) and (2) provided to connect wires as shown in figure above.
Connect the relay harness (1) to the connector on the indoor unit PC board ass'y
(i.e., X18A on VRV).
The relay harness (2) has no polarities. Connect wires to terminals P1 and P2 on the
connecting wiring terminal block provided in the indoor unit switch box.
Wiring to external
controller (e.g.
centralized
control monitor)
1. Input for distant control (operation)
Depending on whether the INPUT selector switch is set to the “VOLT" or "NON VOLT”,
connect wires according to the procedure shown below.
Terminal block for
connecting wiring
(VRV 6P)
Relay harness (2)
Relay harness (1)
Adapter for group distant control
(Blue)
X2A
VRV Multi X18A
X1A
P2P1
(White)
Indoor unit PC
board ass'y
B2
For input in
"VOLT" mode:
BC
B1
Input A
Adapter PC board
KRP4A51, 52, 53, 54
G
Adapter PC board
KRP4A51, 52,
53, 54
Input B
B1
B2
BC
12 to 24 VDC
Set the INPUT selector switch
(SS1) to "VOLT".
(Factory set: "VOLT")
For input in
"NON VOLT" input
Set the INPUT selector switch
(SS1) to "NON VOLT".
VOLT
SS1
SS1
NON VOLT
Connect the
control input on
the common side.
(No polarities)
Use 12 to 24 VDC for the external power
supply. An approx. 10-mA input current is
required per contact.Pay attention to the
capacity of the power supply.
Use micro-current contacts.
(Use contacts of minimum
applicable load of 12 VDC
and 1mA or less.)
Input B
VOLT
NON VOLT
Use micro-current
contacts.
(Use contacts of minimum
applicable load of 12 VDC
and 1mA or less.)
Input A
(Wiring specifications)
Types of wires…Sheathed vinyl cords
or cables
Size of wire…0.18 to 1.25 mm
2
Total length of wiring…150 m at maximum
<Caution>
In order to prevent malfunctions, keep
distance this wiring from the power
lines.
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