47
VCCX2 Controller Technical Guide
Modulating Cooling Output
This output is used to control a Modulating Chilled Water Valve
to maintain the Cooling Supply Air Temperature Setpoint. The
output is configured for 2-10 VDC direct acting operation. See
Figure 28, this page
for wiring details.
+
2
4
V
A
C
G
N
D
R
E
L
A
Y
C
O
N
T
A
C
T
R
A
T
IN
G
IS
1
A
M
P
M
A
X
@
24
V
A
C
R1
R2
R3
R4
R5
RE LAY OUTP UT
TE RMINALS
ANALOG OUTPUT TERMINALS
GND
NOT USED
NOT USED
RETURN DAMPER
RETURN BYPASS
CHILLED WATER
EXH. DAMPER
E-BUS
CONNECT
24 VAC POWER
ONLY
WARNING!
POLARITY
POWER INPUT
TERMINAL BLOCK
VCC-X E
EXPANSION
M1
AAON P/N: ASM01691
LABEL P/N:
G040660
RC
2 +
Y1
3
COM
1
VCC-X EM1
Expansion Module
18-30 VAC
GND
Line Voltage
Chilled Water
Valve Actuator
VCC-X E 1 Module = 5 VA
M
correct total load.
Size transformer for
Figure 28: Chilled Water Valve Actuator Wiring
WARNING:
Observe Polarity! All boards must be
wired with GND-to-GND and 24 VAC-
to-24 VAC. Failure to observe polarity
will result in damage to one or more of the
boards. Expansion modules must be wired
in such a way that the expansion modules
and the controller are always powered
together. Loss of power to the expansion
module will cause the controller to become
inoperative until power is restored to the
expansion module.
WIRING
Chilled Water Valve Actuator
