Mitsubishi Heavy Industries SRK20ZG-S Tech Manual page 59

Wired remote control connection
Please see the instructions in the wired remote control's manual concerning connections to the wired remote control.
1
Cut jumper wire "J2" on the circuit board.
Caution: Both the wired remote control and the wireless remote control supplied with the
indoor unit cannot be used together.
2
Connect the interface and remote control.
The terminals have polarity, so be sure to connect the wires to the corresponding terminal on each end.
Be sure to strip off the only the proper length of sheath material from each connection cable in the interface unit.
Z
Interface side
Y
Wired
terminal
X
block
Cautions when extending the connection cable length
• The maximum total length should be 600 m.
• Be sure to use shielded cable. (Type: 0.3 mm
• If the extended length exceeds 100m, change the wire size to the following sizes. However, inside
the remote control case, the maximum wire size should be 0.5 mm
accordance with the wires connected near the outside.
Within 100 ~ 200 m ······ 0.5 mm
Within
Within
Within
3
Fasten the connection cables with clamps.
Control of multiple units with a remote control
Multiple units (up to 16 units) can be controlled with a single remote control.
1 For group control, install connection cables between the unit and package air conditioner indoor units.
• Connect the cables to terminals X, Y and Z in the interface unit. Each terminal has polarity, so be sure to connect wires to the
corresponding terminals at each end.
• Use cables with a size of 0.5 mm
routing required)
• Keep the total length of connection cables and remote control wiring to within 600 m.
2 Set the address in each unit.
Set the address of using the rotary switch on the circuit board inside each unit. ("0" ~ "F")
Set the addresses in each group so that there is no overlapping of addresses.
After turning on the power, the indoor unit's address is displayed when the Air
Conditioner No. button on the remote control is pressed, so check if the indoor unit
addresses is displayed in the remote control's display when the
are pressed to select each unit.
Z terminal: black wire
Y terminal: white wire
X terminal: red wire
Connection cable
0.3 mm (recommended)
2
~ 0.5 mm (maximum)
2
× 3 cores
2
× 3 cores
300 m ···· 0.75 mm 2
× 3 cores
400 m ···· 1.25 mm 2
× 3 cores
2
600 m ······ 2.0 mm
2 or larger. (cables that are large enough to endure the
Strip off the sheath material from the connection
cable wires inside the wired remote control case.
Z
Remote
The length of wire with the sheathing removed
control
Y
terminal
should be as shown below for each wire.
block
X
Black: 195 mm
White: 205 mm
Red:
× 3 cores)
2
2
or less. Change the wire size in
and buttons
56
- -
Jumper wire (J2)
215 mm
Sheath material
removal length
Rotary
switch