McQuay TSC

OM Centrif Micro ΙΙ-5 13
Figure 3, Communication Wiring
Chiller A
PIGTAIL
485
OPDR
C
AB
UCM
J10
J11
BLU/WHT
WHT/BLU
SHIELD
(+)
(-)
UNIT CONTROL
J11 PORT
Chiller B
485
OPDR
C
BLU/WHT
WHT/BLU
SHIELD
B
A
UCM
J10
PORT
Chiller C
(+) (-)
J11 Port
UNIT CONTROL
UNIT CONTROL
P
P
P
P
NOTE: A fourth chiller, Chiller D would be connected to chiller C same as chiller C to chiller B.