Engineering

EDUS181520C Control Devices
Options 581
5
Use a small voltage contact of a
minimum current load of 12 V,
1 mA or less.
Use an external 12 - 24 V power supply. Each contact
requires approximately 10 mA, therefore carefully select
power supply capacity.
1. Remote control input (Operation control)
Wiring to outside units (Central control monitor)
Wiring to indoor units
For voltage input
Volt
SS1
Volt
Non
Input B
BC
12-24V
Input A
B1
B2
G
Input B
BC
B2
B1
Input A
Non
SS1
Volt
Volt
For Non volt input
Electric wiring
1
2
Wire as described below. Wiring differs depending on whether using a voltage or no-voltage input.
<Note>
First, wire between the indoor and outdoor units, and then to the separate power sources, and finally between the indoor units
and the remote controllers. Then, check if they operate properly.
(If wiring for group control by remote controller, check crosswires.)
For details, see the installation manual of the indoor and outdoor units.
Next, wire between outside units such as the central control monitor, etc. and make the necessary settings.
For details, see Wiring to outside units (Central control monitor) .
Indoor unit PCB
P1P2
Relay harness (1)
White
Blue
Relay harness (2)
X1A
Adaptor
X2A
X35A
Transmission wiring
terminal board (6P)
Make connections as shown above, using the attached relay harnesses (1) and (2).
•
Connect relay harness (1) to the connector on the indoor unit PCB.
•
Relay harness (2) has no polarity. Connect it to terminals P1 and P2 on the transmission wiring terminal board inside the indoor
unit electric parts box.
Set the changeover switch (SS1) to
"Volt". (Factory set: Volt)
Connect the control input
to the common contact
(No polarity).
Adaptor
KRP4A74
Set the changeover switch (SS1) to
"Non volt".
Use a small voltage contact of a
minimum current load of 12V,
1 mA or less.
Adaptor
KRP4A74
(Wiring specifications)
Wiring
…
Sheathed vinyl cord or cable
Gauge
…
AWG24-16
Length
…
Max.490ft
Keep transmission wiring away from power
supply wiring to avoid malfunctions.