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Other Information
4.1
Remote Unoccupied
When the REM input is connected to a central
system or a telephone controller and a signal is
received through this input, the TH144 will
switch to the unoccupied setpoint.
• The yellow LED on top of the display turns on
when the unoccupied mode is activated.
• The
icon is displayed.
• For details on how to operate your telephone
controller
(CT240/CT241),
manual.
• When this mode is activated remotely it can
only be deactivated remotely. Although, it can be bypassed for a
2-hour period (see 4.2).
4.2
2-hour Temporary Bypass
When the TH144 is in Automatic or Remote Unoccupied mode, you
can temporarily bypass the current setpoint for a 2-hour period after
which it will return to the previous mode.
Automatic (schedule programs)
• Set the desired temperature
predefined setpoint.
Remote Unoccupied
• Set the desired temperature
On non-programmable models, all buttons are locked except for
the
buttons.
On programmable models, all buttons are locked except for the
Day
Hour
Minute
,
,
and
• The yellow LED on top of the display remains on, but the
disappears.
4.3
Fan Modes
(Fan button)
The TH144 thermostat is equipped with a fan button offering two fan
settings: On and Automatic.
• When On: (
) the fan runs continuously.
• The Automatic setting allows the fan to run only during heating or
cooling cycles.
TH144
refer
to
its
or quickly press
or
.
buttons.
4.4
Automatic Changeover
4.
When
the
changeover) is selected, the thermostat
analyzes the system's requirements and
automatically alternates between HEAT and
COOL mode to provide occupant comfort.
There are two ways to use the automatic
changeover mode:
4.4.1 Fixed Setpoint (
When you set the temperature using the
TH144 uses this unique temperature setpoint for temperature control.
The thermostat automatically switches to HEAT mode when the
ambient temperature drops under the temperature setpoint whereas
the COOL mode is activated when the temperature rises above the
temperature setpoint.
In order to switch modes, the ambient temperature must be
maintained over or under the control band for more than 12 minutes.
4.4.2 Predefined Setpoint (
When a predefined setpoint button is selected, the TH144 uses the
corresponding
temperature control.
The thermostat automatically switches to COOL mode when the
to use a
ambient temperature rises above the COOL setpoint whereas the
HEAT mode is activated when the ambient temperature drops below
the HEAT setpoint.
In order to switch modes, the ambient temperature must be
maintained over or under the setpoint control band for more than 12
minutes.
icon
AUTO
mode
(automatic
)
,
or
)
COOL
and
HEAT
setpoint
400-144-000-C
arrow buttons, the
temperatures
for
2008-02-08
5/6
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