York IDH072B21S Series Installation And Maintenance Manual page 30

(10) Wired Controller Connection
● VRF Systems
(a) Wired Controllers to each Unit for Individual Operation Setting
Outdoor Unit
(b) Single Wired Controller for Individual Operation Setting
Outdoor Unit
(c) Wired Controller Connections between different Refrigerant Cycles
Outdoor Unit
Wired
Controller
1. The DIP switch settings for the outdoor unit should be performed in accordance with the "Installation and
Maintenance Manual" for the outdoor unit.
2. Be aware that communication cable for the wired controller is required in these instances:
a. The following functions are set to the sub unit which is not installed with the wired controller.
● Remote ON/OFF function settings, (No.1, 2, and 3), (External Input / Output Function)
● Power supply ON/OFF functions, (No.1 and 2), (Function Selection)
● Prohibiting the wired controller after manual stoppage (External Input / Output Function)
● Group setting by the centralized controller
b. The combination of twin, triple, or quad is controlled by single wired controller.
c. The address for the indoor unit is changed from the wired controller.
26
Indoor Unit Indoor Unit
A B
Wired Wired
Controller Controller
Indoor Unit Indoor Unit
A B
Wired
The communication cables
Controller
for the wired controller
is necessary.
Indoor Unit Indoor Unit
A B A B
Wired
Controller
Individual
Simultaneous
(Thermo ON / OFF individually)
NOTICE
A B
A B
Indoor Unit Indoor Unit
A B
A B
Individual
Outdoor Unit
Wired
Controller
P01432Q-rev.1