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VAV / VVR BOARD LAYOUT
Figure 3: VAV / VVR Board Layout
The VAV is a single board controller with plug-on terminal strips for all input and output connections.
The board is under the black clamshell cover on the VAV unit, with the right side terminal strips exposed along the
right side of the controller. Remove the cover to expose the entire board, and to make connections to the left
terminals.
The board is a snap-track mounted unit on the VVR, and provides complete access to all terminal strips when
mounted in an existing control enclosure or other NEMA 1 type box.
L
1
L
2
N
O
C
N
O
C
N
O
C
N
O
C
+
-
+
-
+
-
+
-
+
-
R
E
F
4
3
2
1
2
4
V
A
C
H
E
A
T
IN
G
R
E
L
A
Y
O
U
T
P
U
T
S
A
O
1
1
2
A
N
A
L
O
G
IN
P
U
T
S
R
S
4
8
5
C
O
M
M
B
U
S
C
W
C
O
M
C
C
W
D
A
M
P
E
R
+
-
+
-
2
1
D
IG
IT
A
L
IN
P
U
T
S
+
-
S
P
A
D
J
+
-
3
F
D
B
K
O
U
T
IN
G
N
D
G
N
D
+
2
8
A
O
2
+
-
3
R
S
2
3
2
S
E
R
V
IC
E
P
O
R
T
A
O
2
VELOCITY SENSOR
NOT USED
DIRECT CONNECTION PORT
(RJ11 ON ROOM SENSOR)
OPTIONAL 0-10K DAMPER FEEDBACK
SETPOINT ADJUSTMENT
(SLIDEBAR ON ROOM SENSOR)
OVERRIDE BUTTON ON ROOM SENSOR
DIGITAL INPUT 2
DAMPER ACTUATOR
POWER CONNECTION (24VAC/DC)
DIGITAL OUTPUT RELAYS (4 SPST / N.O.)
MODULATING REHEAT VALVE (0-10VDC)
ROOM & DUCT TEMPERATURE
RS485 COMMUNICATION BUS
V
A
V
/V
V
R
C
O
N
T
R
O
L
L
E
R
B
O
A
R
D
