User`s manual

29
Length (m) Wire size
100 to 200 0.5mm
2
x 2 core
To 300 0.75mm
2
x 2 core
To 400 1.25mm
2
x 2 core
To 600 2.0mm
2
x 2 core
(1) When one outdoor unit is used
(3) The signal lines can also be connected using the method shown below.
(2) When plural outdoor units are used
A1 B1
AB AB AB
Outdoor signal line
terminal block
Indoor signal line
terminal block
Indoor unit Indoor unit Indoor unit Indoor unit
Outdoor unit Outdoor unit Outdoor unit Outdoor unit
Loop wiring prohibited
Wires can be connected
across different refrigerant
systems when wired within
1 Superlink system
A B
Indoor unit
A B
Indoor unit
A B
Indoor unit
A B
Indoor unit
A B
Outdoor unit
Remote control
(a) The maximum number of indoor units that can be connected in a system is 128 and it is possible to configure
outdoor units and/or indoor units as an outdoor or indoor unit group connected with each other with two wires.
(b)
Remote control wiring specifications
Indoor and outdoor signal line do not have a polarity.
Any of the connections in the following illustration can be made.
The signal lines cannot form a loop,
so the wirings shown as
in the diagram are prohibited.
The control wiring is 5 Volt DC,
non-polarised, two wire connection
notated as ‘A1’ and ‘B1’. This ‘AB’ wiring
connects outdoor unit to indoor unit and
indoor unit to indoor unit.
This wiring must be a 2-core shielded
cable size 0.75mm
2
or 1.25mm
2
.
We recommend the both ends of the
shield of the cable are connected to
ground (earth) at all the indoor units and
outdoor units.
When plural outdoor units are used,
Connect the signal cable between indoor
and outdoor units and the signal cable
between outdoor units belonging to the
same refrigerant line to A1 and B1.
Connect the signal line between outdoor
units on different refrigerant lines to A2
and B2.
For current specification of 2-core (AB)
wiring, please consult your MHI dealer.
For interconnecting wiring between the remote control and
indoor units (XY wiring) use 2-core cable size 0.3mm
2
. The
maximum length of 2-core cable is 600 metres. Where the
2-core wiring exceeds 100m, use the wire size detailed on
the table opposite.
The signal wires can also be connected using the method shown below.
A1
B1
A
B
A1
B1
A
B
Indoor unit
Indoor unit
Indoor unit
Indoor unit
A
B
A
B
A1·B1 A2·B2
A
B
A
B
Outdoor unit
A1·B1 A2·B2
Outdoor unit
A1·B1 A2·B2
Outdoor unit
A1·B1 A2·B2
Outdoor unit
Signal line
Refrigerant pipe
Network connector
Outdoor unit
Indoor unit
Indoor unit
Outdoor unit
Indoor unit
Indoor unit
Outdoor unit
Indoor unit
Indoor unit
Important
1.
2.
3.
4.
5.
~1000m
1000~1500m
YES
YES
YES
NO
0.75mm
2
1.25mm
2
electrical wiring – control wiring