Trane UniTrane Installation, Operation And Maintenance Instructions page 76

Controls Interface
Receiver Power-up Sequence
When power is applied to the receiver, one of the following sequences occurs. The sequence is
dependent on the address setting and the association status of the receiver.
Address set to 000 and receiver is not associated with a sensor
•
•
•
Address set from 001 to 999 and receiver is not associated with a sensor
•
•
•
•
Address set from 001 to 999 (and not changed since most recent power-up) and receiver
is associated with a sensor
•
•
•
•
Note: Once a receiver communicates to a WTS sensor, the receiver disables (opens) its zone
Sensor Transmission Time and Temperature Variables
Sensor transition time variables are as follows:
•
•
•
Note: If a sensor transmits a message to the receiver and the receiver does not reply, the sensor
Sensor temperature time variables are as follows:
•
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LED5 is constantly On, indicating power is applied and the receiver is functional.
All models: Zone temperature and cooling setpoint default to 72.5°F (22.5°C).
WDS only: The heating setpoint defaults to 70.5°F (21.4°C) and the fan/system output will be
2230 Ω (see
"Output Values—Failure and Default Modes of Operation, " p.
Status LED3 will display a 2-blink pattern diagnostic
LED5 is constantly On, indicating power is applied and the receiver is functional.
All models: Zone temperature and cooling setpoint default to 72.5°F (22.5°C).
WDS only: The heating setpoint defaults to 70.5°F (21.4°C) and the fan/system output will be
2230 Ω (see
"Output Values—Failure and Default Modes of Operation, " p.
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 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 "Observing the Receiver for Readiness to Associate, " p.
LED5 is constantly On, indicating power is applied and the receiver is functional.
Zone temperature and setpoint default to 72.5°F (22.5°C). WDS only: Heating setpoint defaults
to 70.5°F (21.4°C), 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
"Output Values—Failure and Default Modes of Operation, " p.
setpoint output indefinitely.
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.
will retransmit the message to the receiver every 30 seconds until communication to the
receiver is re-established.
The minimum change in zone temperature required to force a sensor transmission is:
– 0.2°F (0.11°C) when the temperature range is between 60°F (15.6°C) and 80°F (26.7°C)
– 0.5°F (0.28°C) when the temperature range is between 32°F (0°C) and 60°F (15.6°C) or
between 80°F (26.7°C) and 122°F (50°C))
122).
(Table 39, p. 117).
122).
69).
122).
UNT-SVX07B-EN