Lennox LXTFF01M Installationsanleitung Seite 34

WIRINGS
This controller can be powered either with 230V~ or with
24V~.
The thermostat is factory set at 230V~, with jumper in position
JP1, with frequency at 50Hz, with jumper in position JP4. To
select 24V~ supply move jumper JP1 (Fig. 6) to position JP2
(Fig. 6). To select 60Hz frequency move jumper to JP4 (Fig.
6) to position JP3 (Fig. 6).
As can be seen in Fig. 7 supply terminals are L and N.
If you have a 230V power supply, the live and neutral must be
respected An input is available on terminal 3 for centralised
heating/cooling selection.
An input is available on terminal 4 to activate "Economy"
mode.
A window contact can be connected to terminals 14 and 16.
Note: there are limitations for window contact use. Carefully
read the paragraph "ATTENTION".
The function of the input terminals 3, 4 and 16 can be
changed, through parameters C14, C15 and C16.
Signals to terminals 3 and 4 can be connected terminals 3
and 4 of other thermostats in the same building (centralised
Heating/Cooling function).
RS connector, or alternatively terminals 14 and 15, can
be used to connect an external room temperature sensor.
Change confi guration to select external or internal sensor
use.
Terminals 13 and 14 is an input to connect different types of
sensors for special functions: connect a delivery temperature
sensor for the "changeover" and/or "cut-off thermostat"
34
function, or connect a bimetal thermostat with "cut-off
thermostat" function. Change confi guration to select which
type of sensor to use.
This device is suitable to control the fan speed of a 3-speed
fan motor. The speed selection is done through three relays,
which outputs are available on terminals 6, 7 and 8. 5 is the
common terminal of the relays. Fig 7 shows how to wire the
fan motor. Fan outputs from terminals 5 to 8, are voltage
free contacts and are isolated towards the other thermostat
circuits. Therefore, a thermostat can be supplied with low
voltage (24V~), while controlling a high voltage fan (230V~).
In this case, a separation of the 24V~ and 230V~ cables is
required in accordance with current standards. The device
can control many types of valves or, alternatively, a electric
heater or compressor.
Terminals 9 and 10 are for the heating output, while terminals
11 and 12 are for the cooling output. Fig. 8 shows different
valve connection modes, according to their type. Change
confi guration to select which type of valve is used.
If on-off or proportional PWM on-off valves are used, connect
according to Fig. 8 a or c. If 3 point fl oating servocontrols
are used, connect according to Fig. 8 b or d. Systems with
different types of valves on heating and cooling outputs
can be managed. If the system has an electric heater for
integration or in replacement of the heating valve, connect
according to diagrams in Fig. 8 e or f.
The thermostat can also manage a heat pump system and,
therefore, control the compressor and a 4-way change-over valve.
In this case connect as in Fig. 8 g. The change-over valve is
connected to a different terminal to get a reverse operation logic.
LXTFF01M-IOM-1511