Installation - Controls
56
UNT-SVX041D-EN
•
LED3 flashes On every 2 seconds when it is ready to
accept a sensor association request. 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
Receiver for Readiness,” p. 53
Address set from 001 to 999 (and not changed
since most recent power-up) and receiver is
associated with a sensor
•
LED5 is constantly On, indicating power is applied and
the receiver is functional.
•
Zone temperature and setpoint default to 72.5°F. WDS
only: Heating setpoint defaults to 70.5°F, Fan = Auto,
System = Off.
•
The receiver waits for a broadcast transmission 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
).
Note:
Once a receiver communicates to a WZS sensor,
the receiver disables (opens) its zone setpoint
output indefinitely.
Transmission Variables
Sensor transmission time variables are as follows:
•
The maximum time between sensor temperature
transmissions is 15 minutes.
•
The minimum time between sensor temperature
transmissions is 30 seconds.
•
The minimum time for transmitting temperature
setpoint changes is 10 seconds.
Note:
If 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 temperature 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
required to force a sensor transmission is: 0.1°C for a
model
WDS
sensor.
