Lennox LXTFF01M Installationsanleitung Seite 41

INSTALLER CONFIGURATION
Installer confi guration defi nes the thermostat operation and
allows to adapt it to the different types of plants and systems. To
access the confi guration menu, simultaneously press the " " e
"" buttons for a few seconds until "COn" (confi guration) appears
on the display.
Once entered in confi guration menu, pressing " " scrolls through
the various parameters, identifi ed with P and the parameter
number, from P01 to P24. The confi guration end is displayed with
"End". Press " " again to save the confi guration and and return to
normal operation.
Press the " " button, at any time, to exit from the confi guration
menu without saving the changes.
When scrolling the parameters pressing button " " or "" or ""
displays its current value.
To change the value, when it is displayed, press button "" or "".
To prevent unauthorised access to the confi guration remove the
internal jumper (JP5) shown in Fig. 6. Any attempt to access the
confi guration will display the fl ashing " " icon.
The installer confi guration consists of two lists of parameters:
- main parameters P01 to P24 (table 1)
- extended parameters C01 to C19 (table 2)
The extended parameters C01-C19 allow an advanced thermostat
confi guration.
When the display shows "COn" at confi guration start or "End" at
confi guration end, press the " " button to access the extended
parameters.
INSTALLER CONFIGURATION RESET
In order to reset the installer confi guration, so that all parameters
are reset to the factory default values, enter the confi guration
LXTFF01M-IOM-1511
mode by holding down the keys " " and "" until the display
shows "Con", then hold down the two keys "" and "" for a few
seconds, until the display returns to the usual screen.
DESCRIPTION OF MAIN CONFIGURATION PARAMETERS
The main installer confi guration parameters are shown in table 1
and explained below.
P01: System type selection.
2 pipes system: when confi gured for a two-pipes system the
controller drives one valve only, wired at the "heating" valve
terminals, both when heating and when cooling, as the same
valve is going to control either hot or cool water fl ow.
See wiring diagram in Fig. 8 a and b.
In case of a two-pipes system without valve, and therefore with no
wirings at the valve output terminals, make sure to set parameters
P03 and P04 to "fan control" in order to get an effective regulation.
4 pipes system: when confi gured for a four-pipes system the
controller drives both valves outputs in order to activate either the
hot water or the cooling one according to the actual requirements
of the controlled environment.
See wiring diagram in Fig. 8 c and d.
Electric heater system: the regulator is confi gured to control a
system equipped with an electric heater: see the section "Electric
heater system" for more details.
Integrating electric heater system: the regulator is confi gured to
control a system equipped with an electric heater: see the section
"Integrating electric heater system" for more details.
Heat pump system: the regulator is confi gured to control a system
equipped with a heat pump: see the section "Heat pump system"
for more details.
P02: This parameter sets the way how the controller switches from
the cooling mode (summer) to the heating mode (winter) and vice
versa.
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