Johnson Controls METASYS VAV111 User Manual

44 VAV Controller—Variable Air Volume Controller
You may use one sensor as a master input to multiple VAV Controllers
instead of mounting and wiring separate zone sensors for each controller.
This application is especially beneficial when you have a mechanical
system that uses more than one terminal unit to serve the same area, for
example, a large conference room or open office space.
Note: The practical limitation to this application is four VAV Controllers
to one sensor.
1 2 3 4 5 6
BINARY INANALOG INPUTS BIN ARY OUT PUTS
TM
BI NARY INPU T
ANALOG INPUTS
1 2 3 4 5 6 1 2 3 4
ANALOG INPUTS
CO MMO N
24 VAC
TO
ZONE
STAT
BINARY OUTPUT
1 2 3 4 5 6 7 8
Z BUS
DSI
P5 P6
1 2 3 4 5 6
1 2 3 4 5 6
BINARY INANALOG INPUTS BIN ARY OUT PUTS
TM
BI NARY INPU T
ANALOG INPUTS
1 2 3 4 5 6 1 2 3 4
ANALOG INPUTS
CO MMO N
24 VAC
TO
ZONE
STAT
BINARY OUTPUT
1 2 3 4 5 6 7 8
Z BUS
DSI
P5 P6
1 2 3 4 5 6
Metastat
sensors2
Set for
2 VDC and
Temperature
8-pin Connectio
n
on Back
Set for
2 VDC and
Voltage
Sensor +
Sensor -
N2 -
N2 +
N2 REF
1 2 3 4 5 6
O
N
1 2 3 4 5 6
O
N
1 2 3 4 5 6
O
N
1 2 3 4 5 6
O
N
Note: Route sensor wiring and N2 wiring together. Since the VAV Controller is a self-terminating
device, end-of-line termination for the N2 Bus is not required.
Figure 18: Example of Sharing a Sensor Among VAV Controllers
Figure 18 shows the wiring and analog input switch settings for
two controllers that use one zone sensor. To ensure the noise immunity of
the VAV Controllers, pull the N2 Bus wiring with the sensor wiring
between controllers that share the same zone sensor.
Notes: This configuration shifts the AI value by one degree for each added
controller. Compensate for this temperature shift by entering an
offset of -1°F (for each added controller) through the AI Offset
Table. You can find this table in the Commissioning mode of
HVAC PRO for Windows.
On the HVAC PRO for Windows Analog Input Modify screen,
verify that both controllers are set to the same temperature sensor
type.
If the master zone sensor uses the Zone Bus connection, only the
master controller can be loaded and commissioned from the sensor
connection.
Sharing a Sensor

Johnson Controls METASYS VAV111 Specifications

General

Brand	Johnson Controls
Model	METASYS VAV111
Category	Controller
Language	English