Carrier TOSHIBA MMK-UP0301HP-UL Service Manual page 126

Max. number of connectable indoor units, and communication type
Outdoor unit
Indoor unit
Remote controller
Communication type
Max. number of connectable unit
: Other than U series
NOTE
Use copper supply wire.
Use UL wire rated 600V for the power supply .
Use UL wire rated 300V for the remote control wires and control wires.
CAUTION
The remote control wire (Communication line) and AC208/230V wires cannot be parallel to contact each
other and cannot be stored in the same conduits. If doing so, a trouble may be caused on the control system
due to noise or other factor .
Wiring between indoor and outdoor units
NOTE
An outdoor unit connected with control wiring between indoor and outdoor units wire becomes
automatically the header unit.
Wiring example
Outdoor Power supply
Ground
L1 L2 L3 N
terminal
Indoor unit
Ground
Disconnect
switch per
NEC
Indoor
power
supply
Circuit
208 /
breaker
230-1-60
U series U series
U series U series
U series
TU2C-Link
16
Outdoor Power supply
Circuit breaker
Header outdoor unit
Ground
terminal
Control wiring between indoor and outdoor units
Control wiring between indoor units
Indoor unit
Ground
L1 L2 L1 L2
Disconnect
switch per
A B
NEC
Remote control
Unit type
U series U series
U series
TCC-Link
Circuit breaker
Follower outdoor unit
L1 L2 L3 N
Control wiring between outdoor units
Indoor unit
Ground
L1 L2
Disconnect
switch per
A B
NEC
Remote control
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U series U series
U series U series
8
Indoor unit
Ground
L1 L2
Disconnect
switch per
A B
NEC
Remote control
Group control