Installation and Maintenance Manual

Wireless Sensors
UNT-SVX07D-EN 83
• The receiver conducts an energy scan for 20 seconds to
determine the clearest channel on which to operate.
• LED3 flashes On every 2 seconds when it is ready to
accept a sensor association reque
st. When an
association request is made by a sensor, the receiver
instructs the sensor on which power level to operate.
Then the receiver and sensor begin operation at the
appropriate channel and power level (see “Observing
the Receiver for Readiness to Associate,
” p. 78).
Address set from 001 to 999 (and not changed since
mo
st recent power-up) and receiver is associated
with a sensor
• LED5 is constantly On, indicating power is applied and
the re
ceiver is functional.
• Zone temperature and setpoint de
fault to 72.5°F. WDS
only: Heating setpoint defaults to 70.5°F, Fan = Auto,
System = Off.
• The receiver waits for a broadcast transmiss
ion from
its associated sensor. When a transmission is received,
the receiver positions its zone temperature and
setpoint outputs appropriately.
• If the receiver does not receive a communicated signal
from its associated
sensor within 35 minutes, zone
temperature and setpoint outputs fail, generating a
unit controller alarm (see “Output Values—Failure and
Default Modes of Operation (Wireless Controls),”
p. 121).
Note: Once
a receiver communicates to a WZS sensor,
the receiver disables (opens) its zone setpoint
output indefinitely.
Sensor Transmission Time and Temperature
Variables
Sensor transition time variables are as follows:
• The maximum time between sensor temperature
transmissions is 1
5 minutes.
• The minimum time between sensor temperature
transmissions is 30 seconds.
• The minimum time for tra
nsmitting temperature
setpoint changes is 10 seconds.
Note: If a
sensor transmits a message to the receiver and
the receiver does not reply, the sensor will
retransmit the message to the receiver every 30
seconds until communication to the receiver is re-
established.
Sensor temperature time variables are as follows:
• The minimum change in zone tem
perature required to
force a sensor transmission is:
– 0.2°F when the temperature
range is between 60°F
and 80°F
– 0.5°F when the temperature range is between 32°F
and 60°F or between 80°F and 122°F
• The minimum change in temperature setpoint
r
equired to force a sensor transmission is:
– 0.1°C for a model WDS sensor
Operating Mode (Model WDS)
This section describes how to operate the Trane wireless
sensor, model WDS. Figure 34 shows an example of a
model WDS that has been configured and is in operating
mode.
Changing Room Temperature
Changing Heating and Cooling Room Temperature
Settings (applies to some systems)
Changing the Fan Setting
Requesting Temporary Occupancy
Error Codes
Lock Symbol
Figure 34. Wireless sensor (model WDS) in operating
mode
This symbol
shows the
current room
temperature, or
your setpoint
selection while
you are making
an adjustment.
1. To increase the room
temperature, press
.
To decrease the room
temperature, press
.
2. To confirm, press
or wait 5 seconds.
The display will return
to the home screen.
When you select
a setpoint, this
symbol
appears.
.
Keypad
Test button
Test symbols (appear only
when Test button is pushed
Occupancy
indicator/Error code
Temperature
System settings (not available for
fan-coil or Force-Flo units)
Fan settings
.
UNT-SVX07_-EN.book Page 83 Friday, April 27, 2012 9:40 AM