DCN: 141-00940-09 11/02/07
2
TXB16 OPERATION
The TXB16 thermostat provides the latest technology in a full-featured universal thermostat with X10
Power Line communications. The TXB16 has many new features including:
•
Separate Heating and Cooling Setpoints
•
Multistage HVAC Systems Support
•
Setup Mode from the Wall Display Unit
•
Automatic Remote Sensor Detection
•
Status LED X10 Signal Indication
•
Selectable X10 Decode Table
•
Bi-directional X10 Standard
•
Enhanced X10 Protocol
The TXB16 thermostat consists of two parts, a
TS16
Wall Display Unit (WDU)
and a
HVAC
Control Unit
.
The Wall Display Unit provides users functions like a traditional thermostat and connects to the Control Unit
by a 4 wire cable. The Control Unit connects at the HVAC system using the standard thermostat
connections and provides the thermostatic temperature control of the system. The Control Unit also has
the X10 Power Line Interface connection.
The TXB16 now maintains separate heating and cooling setpoints and you can select single or dual
setpoint operation. The display shows the setpoint of the current system mode (Heat or Cool). In the Off or
Auto mode, the system keeps track of the current operating mode of the last call, either heating or cooling.
Single setpoint commands are still used to send and request setpoint information.
When a new
setpoint is sent to the TXB16, it will automatically convert that setpoint into a heating or cooling setpoint
based on the current operating mode of the stat. This allows compatibility with single setpoint systems.
When Autosend in enabled, it will report a setpoint change as either a heating or a cooling setpoint with
new X10 Bi-directional messages.
In addition to the universal Standard or Heat Pump HVAC system type support, the TXB16 supports
multistage heating/cooling system outputs. The control unit can support 2 stages of heating and cooling for
Standard systems, or 3 stages of heating and 2 stages of cooling for Heat Pump systems.
The TXB16 has a convenient setup mode from the Wall Display Unit. You can set the X10 House code
address, the F or C temperature mode and easily calibrate the internal and remote sensors.
The TXB16 has automatic detection and setup of remote temperature sensors. Remotes sensors have 3
address settings that, when detected by the TXB16, will be used for specific functions such as in lieu of the
internal sensor, averaging with other sensors or an outdoor sensor.
The Status LED shows X10 signal traffic, which can be helpful in trouble shooting system installation
problems. The Status LED flashes slowly to indicate system OK. When an X10 command is received,
normally the Status LED will blink fast 2 times. If the command is addressed for this thermostat, the LED
will flash fast 4 times. X10 transmissions will also flash the LED.
The TXB16 supports all of the RCS X10 Unit Code and Bi-directional protocols.
The TXB16 supports the RCS Unit Code “B”, “P” and “L” decode tables as well as the bi-directional ”Preset
Dim” table. The default X10 Unit Code decode table, B or P, can be set to allow compatibility with existing
TX15/TX15-B thermostats and control software. Changes in decode table selection by using “All lights On”
or “All Units Off” commands or Preset Dim Commands are now stored in permanent memory.
Remote control of the TXB16 via the robust X10 Bi-directional communications protocol allows for the
thermostat’s temperature, heating and cooling setpoints, operating mode and fan functions to be monitored
or changed.
Many new commands have been added to support the TXB16’s new features. Refer to the X10 protocol
document, DCN 150-00200.
