Description Of Controls - Lennox LXTFF01M Manual

INTRODUCTION
This digital controller is intended for temperature regulation in
environments equipped with fan-coil heat-cool exchangers.
The device automatically controls the fan speed on 3 levels
as well as the possible valves in order to regulate the room
temperature in the most suitable way. Temperature acquisition
can be performed either with the internal sensor or with an
external one (optional).

DESCRIPTION OF CONTROLS

The user has fi ve buttons available to control the thermostat.
- Key " " (On/Off)
This button is used to turn on and off the controller: when the
controller is turned off the display does not show the temperature,
yet some symbols could still be turned on to show the active
outputs.
If the thermostat is confi gured in the "Economy" function (P17),
the " " button activates/deactivates this status according to the
following diagram:
ON
- " " button (Speed)
This button changes the set fan speed.
When the " " button is pressed, the fan speed changes
according to the following cycle:
where 1, 2 and 3 mean the three fi xed fan speeds meanwhile where 1, 2 and 3 mean the three fi xed fan speeds meanwhile
AUT mean the automatic fan speed AUT mean the automatic fan speed.
30
More precisely 1 means the lowest speed, 2 the medium speed
and 3 the fastest. Therefore when the controller is set on one
of the three mentioned speeds, the fan will be activated when
necessary at that (fi xed) speed. Whenever the automatic speed
is set instead, the controller will activate the fan at a speed
as much high as the difference between the desired room
temperature against the current one.
- Key " " (Menu)
This button is used to change the display readout mode:
when depressed once it makes the display show the set-point
temperature.
In case the controller is confi gured to show the delivery water
temperature, this value will be displayed with a further button
depression.
When changing the readout, the controller informs the user
about the temperature shown according to the following table:
Set-point temperature
Delivery water temperature
OFF
Repeatedly press the button to cyclically display the various
temperatures. When inactive for a few seconds the display
returns to room temperature.
- " " and "

These buttons set the desired room temperature (set-point) and
the confi guration parameters. If "" or "" are pressed during
normal operation, the set-point temperature is displayed, along
with the new set value.
Even in this case, after a few seconds of inactivity the display
readout returns to the room temperature.
" buttons

LXTFF01M-IOM-1511