Mitsubishi Heavy Industries SRK25GZ-L1 Handbook page 1064

FDC-HKXR
(b) When controlling plural units.
1) Use the same procedure shown in the drawing above for the wiring of the power supply, both indoor and outdoor units and
remote controller
When the wiring length for the remote controller exceeds 100 m, use the wiring procedure shown in the drawing below.
2) Connect each of the indoor units for group controlling (3 cables)
a) Connect the cables to the terminal blocks of X, Y, and Z for the indoor unit remote controller. Since the cables have polarity,
be sure to connect them to terminal blocks with the same numbers.
b) Use cables of more than 0.5 mm
c) The total length of cables for crossover connection and the remote controller should be less than 600 m.
Allowable range of wire thickness and length
Standard Within
3) When there is more than one outdoor unit, they can be controlled by one remote controller.
4) One remote controller is capable of controlling up to 16 units in group.
Note (1) Use shielded cables, when wiring in parallel with cables for other power supply or when there is a possibility of being
affected by outer noise such as noise from a high-frequency unit.
Unit address
No.01
(Outdoor unit
address No.01)
(Indoor unit
address No.00)
(Outdoor unit
address No.01)
(Indoor unit
address No.01)
(Outdoor unit
address No.01)
(Indoor unit
address No.02)
Remote controller
(c) Settings for main and secondary units when multiple remote controllers are used.
Up to two remote controllers can be used for each indoor
unit (or each group of indoor units).
1) There are two methods for arranging this. One
method is to take a remote control connection wire
(3-strand) from the indoor unit for the secondary
remote control. The other method is to use a jumper
wire from the main remote control.
2) Set the remote control switch for the secondary unit (SW4) to
secondary unit. (It was set to main unit a the factory.)
Note (1) The remote controller sensor setting is only enabled on the main remote controller.
Be sure to position the main remote controller in a location where it can detect
the room temperature.
1062
2
(Flexible and easily moved)
× Within 100m
2
0.3mm
× Within 200m
2
0.5mm
× Within 300m
2
0.75mm
× Within 400m
2
1.25mm
× Within 600m
2
2mm
Outdoor unit
A B
Indoor unit
A B
Indoor unit
A B
Indoor unit
A B
Outdoor unit
Unit address
A B
No.02
Indoor unit
(Outdoor unit
address No.02)
(Indoor unit
A B
address No.03)
Indoor unit
(Outdoor unit
address No.02)
(Indoor unit
A B
address No.04)
Indoor unit
(Outdoor unit
address No.02)
(Indoor unit
A B
address No.05
Indoor unit
X Y Z
X Y Z
SW4
Remote
control
Main
Remote control signal wire (has
polarity)
Match X Y and Z and connect.
X Y Z
SW4
Remote
control
Secondary