Johnson Controls York Smart Equipment SC-EQ - SC-EQ Connections to Other Chiller Boards

JOHNSON CONTROLS
30
FORM 450.50-N1
ISSUE DATE: 08/19/2019
SECTION 2 - INSTALLATION
FIGURE 33 - SC-EQ COMM CARD CONNECTIONS FOR CHILLERS WITH THE 02478 MICROBOARD YCAV/
YCIV/YVAA/YVWA
LD20014a
J16
SC-EQ
Power
JP1
RS485
2
3
1
4
5
+5V
P3-
P3+
GND
Shld
031-02478-xxx
Equipment Cable
York Talk 2
RS485
(4800 baud)
SC-EQ J9
+12 VDC
GRD
Power Harness
(+12v DC)
RED
BLACK
SHIELD
(Open)
RED
BLACK
SC-EQ
EQ 485 Port J8
+ - COM SHLD
SC-EQ
EQ 485 Port J8
+ - COM SHLD
Note: JP1 on the
031-02478-xxx
board must be set to
the RS485 position
when the SC-EQ
BAS communication
is required.
NOTE: Enabling any part of PRINT functions will disrupt BAS/SC-EQ communications.
See YORK Equipment form 201.21-NMx in the installation, Operation & Maintenance (IOM)
Air-Cooled Screw Liquid Chillers manual for more information.
FIGURE 34 - SC-EQ COMM CARD CONNECTIONS FOR CHILLERS WITH THE 03478 MICROBOARD YCAV/
YCIV/YVAA/YVWA/YVFA
LD20015a
J16
SC-EQ
Power
RS485
2
3
1
4
5
+5V
-
+
GND
Shld
031-03478-xxx
Equipment Cable
York Talk 2
RS485
(4800 baud)
SC-EQ J9
+12 VDC
GRD
Power Harness
(+12v DC)
RED
BLACK
SHIELD
(Open)
RED
BLACK
SC-EQ
EQ 485 Port J8
+ - COM SHLD
SC-EQ
EQ 485 Port J8
+ - COM SHLD
TB2
+ - COM SHLD
TB3
Native
Comms
NOTE: The default settings of the 03478 allow the board to communicate with the
SC-EQ. If communication does not occur, check the chiller panel settings to ensure
that Port 2 (TB-2) is set for DE Instance = -1 and Chiller ID set = 0.