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NOTE: A dedicated 24 VAC, 40VA NEC
class 2 transformer is required to power
the Wireless Receiver. Failure to comply
will result in malfunction of the Receiver
due to electrical noise.
All wiring must comply with the
National Electric Code (NEC) and local
codes. Use 16 AWG for power wiring.
Maximum wire lengths should be
based on NEC specifications.
General Information
Zone Sensor Range:
Cataloged 1000 feet (304 meters) line-
of-sight, indoors
Receiver Setup/Normal Switch:
DIP switch 8.
Receiver RJ11 Jack:
Jack for temporary connection of an
external sounder for test purposes.
Receiver Sounder:
Built-in Piezo sounder
Receiver VAV Link Wiring:
The Receiver must be daisy-chained
into the VAV link wiring that connects
all of the UCMs and Tracer Summit. As
specified in Chapter 2, the VAV link
wiring must be twisted shielded pair. A
pigtail is provided for wiring. The red
wire is positive, the black wire is
negative, and the green wire is shielded
Figure 7 . Receiver Wiring Connections
32
Wireless VAV
Systems
ground. Polarity must be maintained
throughout the VAV link.
Wireless System Architecture
Wireless Zone Sensor
The wireless zone sensor is designed
for use in a temperature control
system, operating in conjunction with a
centrally located Wireless Receiver.
Zone sensors are installed in areas
where temperature control is to be
maintained and are responsible for
transmitting temperature, set point, and
the On/Cancel command to the
receiver. The zone sensor measures
temperature and periodically transmits
that information via RF signals to its
assigned receiver.
Wireless Receiver
The receiver is designed for use in a
temperature control system, operating
in conjunction with wireless zone
sensors, which are installed in areas
where temperature control is to be
maintained. The receiver functions as a
communications translator between
the spread spectrum radio communica-
tions and the VAV communications link.
As a Spread Spectrum Receiver, the
device receives, correlates and decodes
a spread spectrum coded transmission.
The serial number of the transmitting
device is checked against a list of valid
serial numbers field programmed into
the Translators by the Tracer BAS
system user. The receiver maintains this
list of valid serial numbers. If the
transmission is valid, the message will
be transmitted over the Trane VAV link.
RF signals from wireless zone sensors
are received by the receiver, which then
sends appropriate messages via
communication wires to specific
heating and air conditioning equipment
assigned to it. This information is also
sent to a central controller for system
monitoring.
Note: A minimum of one receiver per
communication link is required.
Unit Control Module (UCM)
After the zone temperature is received
by the Receiver from the wireless zone
sensor module and broadcast over the
VAV Communication link, the UCM
receives the message packet. The UCM
accepts only those messages having a
sensor serial number that matches the
serial number field programmed into it.
Zone sensor serial numbers are
maintained by the UCM.
Upon receipt of the zone temperature
value, local set point, or On/Cancel
requests, the UCM will take the
VAV-SVX01B-EN
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