Toshiba MCY-MHP0404HS8-E Installation Manual page 25

Keep the rule of below tables about size and length of communication wiring.
Central
controller
This system
U1 U2
U3 U4
U3 U4 U3 U4
Outdoor unit
U1 U2 U1 U2
L1
U1 U2 U1 U2 U1 U2
Indoor unit
A B A B
Table-3
Remote controller Remote controller
Table-1 Control wiring between indoor and outdoor units (L1, L2, L3), Central control wiring (L4)
Wiring 2-core, non-polarity
Type Shield wire
1.25 mm
Size / Length *1
2
2.0 mm
*1 Total of control wiring length for all refrigerant circuits ( L1 + L2 + L3 + L4 )
Table-2 Control wiring between outdoor units (L5) (Other system)
Wiring 2-core, non-polarity
Type Shield wire
1.25 mm
Size / Length
Up to 100 m (L5)
Table-3 Remote controller wiring (L6, L7)
Wiring 2-core
2
Size 0.5 mm
• Up to 500 m (L6 + L7)
Length • Up to 400 m with of wireless remote controller in group control.
• Up to 200 m total length of control wiring between indoor units ( L6 )
EN-47
Other system
Table-1
L4 Header
unit
U3 U4
U1 U2 U5 U6
Table-1
L 2 L
U1 U2 U1 U2 U1 U2 U1 U2
A B A B A B A B A B
L7 L7
L6
Remote controller
2
: Up to 1000 m
: Up to 2000 m
2 2
to 2.0 mm
2
to 2.0 mm
Group control through a remote controller
Group control of multiple indoor units (8 units) through a single remote controller
Indoor unit No.1
Follower
unit
Remote controller
U3 U4
U1 U2 U5 U6
Connection of power wires and communication wires
Table-2
L5
Remove knockouts on the piping / wiring panel on the front of the unit or the panel on the bottom to get the power and
communication wires through the holes.
3
U1 U2 U1 U2
A B A B
L6
NOTE
Separate the power wire and communication wires.
– 24 –
No.2 No.3 No.4
A B A B A B A B
(A.B)
Knockout for the communication wires
and refrigerant piping
Installation Manual
No.7 No.8
A B A B
EN-48