Networkable Fan Coil Controller
Specification and Installation Instructions
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Operation Mode
The Mode Selector Jumper of the thermostat
must be set to the “RUN” position (Operation Mode). Refer to Wiring on page 6.
TFL24
TDU
Power Up
Upon power up, the LCD illuminates and all segments appear for 2 seconds. The thermostat then displays its current version of the
thermostat for 2 seconds followed by the current version of the controller for 2 seconds. Pressing any key on the thermostat
illuminates the LCD for 4 seconds.
CO
2
(Thermostats with CO
2
Sensors)
If enabled via the configuration menu, the thermostat displays the CO
2
reading on the first line above the temperature reading. If
CO
2
display is enabled, the time will not be displayed.
Temperature Display and Setpoint
The thermostat displays the temperature reading. If the sensor is disconnected or short circuited, the unit displays the sensor's
limits.
To toggle the temperature scale between ºC and ºF, press both the
and
keys for 3 seconds. To display the setpoint,
press the
or
key twice. The setpoint appears for 5 seconds. To adjust the setpoint, press the arrow keys while the
temperature is displayed. If the setpoint adjustment has been locked, the lock symbol appears.
C
Actual demand
Room temperature
Appears if in Night Setback (NSB) or
Occupancy (OCC) mode. Flashes if
overridden by user .
%RH
Alternates between room temperature for
8 sec and then room humidity for 2 sec.
(requires Humidity sensor thermostats ,
and Humidity Mode must not be OFF .)
Press once
to display Fan Speed Mode
C
Exits after 5 sec.
Exits after 5 sec.
Press to change mode :
- Auto
- Off
- Cool only
- Heat only
- Fan only
CO
2
reading in ppm
(CO
2
display option must be
enabled in programming mode)
Press any arrow key
twice to display
Setpoint Mode
Appears if setpoint
adjustment is locked
Change
setpoint value
Setpoint value
Exits after 3 sec.
Press to change mode :
- Auto
- OFF
- low
- medium
- High
Press once to
display Control Mode
Press both keys for 3 sec. to
toggle between °C and °F
Appears if setpoint
adjustment is locked
Change
setpoint value
Setpoint value
Exits after 5 sec.
Press for 5 sec.
to display Humidity Setpoint Mode
%RH
