Wiring Between Indoor And Outdoor Units - Carrier MMK-AP0073H2UL Installation Manual

+001111053901_00Ta.book Page 18 Monday, January 17, 2011 11:35 AM
High Wall Type

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
208/230-3-60
Circuit breaker
Header outdoor unit
Ground
L1 L2 L3 N U1U2U3U4
terminal
Indoor unit
Ground
L1L2 U1U2
Disconnect
switch per NEC
Indoor
power
supply
208/230-
Circuit
1-60
breaker
Outdoor Power supply
208/230-3-60
Ground
U5U6 L1 L2 L3 N
terminal
Control wiring between outdoor units
Control wiring between indoor and outdoor units
Control wiring between indoor units
Indoor unit
Ground
A B L1L2 U1U2 A B
Disconnect
A B A B
switch per
NEC
Remote Remote
control control
– 18 –
Circuit breaker
Follower outdoor unit
U1U2U3U4 U5U6
Indoor unit
Ground
L1L2 U1U2 A B
Disconnect Disconnect
A B
switch per switch per
NEC NEC
Remote
control
Installation Manual
Indoor unit
Ground
L1L2 U1U2 A B
EN
18-EN