sauter LXT240R,LXT250R Quick Reference

1/20505990003 B

Remote control for 4/5 modes (24 V) en

Quick reference

LXT240R/LXT250R

Installation Instructions for the electrician

List of contents

1. Description of the remote control

2. Where should you pos. the remote control?

3. Fixing the remote control

4. Inserting the batteries

5. Addressing the transmitter code on the receiver

6. Selecting the mode

7. What to do if . . .

8. Technical data

B11718

T

Y10166

60
°C

0

140
°F
32

Description of the remote control1

Manual remote control with radio transmitter to control
underfl oor heating with 24 V AC receiver

This remote control unit is particularly easy to install. Thanks to its
ergonomic and innovative design, it will enable you to save energy as
well as providing comfortable operation. This device is used to control
the mode for one zone within your installation - or also for the whole
installation - from a central point. Two or more units can be installed
in the same building so that the heating plant can be divided into
specifi ed zones.

Where should you position the remote control?2

You do best to position the remote control unit close to the entrance
door, allowing you to select the mode for the entire installation with
one simple manual action (Auto, Comfort, Eco, Frost Protection or
Climate). You can also install several units and divide your home into
various zones (night or day zones, etc.)

Fixing the remote control3

Remove the adjuster knob1.
Loosen the screw that is located underneath the adjuster knob2.
Remove front piece3.
Affi x the mounting plate using two screws,4.
horizontally or vertically at a distance of 60 mm
Refi t front piece5.
Tighten screws6.
Refi t adjuster knob7.

1

2

6

3

5

7

4

60

60

B11688

Fig. 1 Fixing the remote control

Inserting the batteries4

B11705

Slide the cover of the battery compartment
downwards; insert batteries, observing polarity.

Inserting the batteriesFig. 2

Addressing the transmitter code 5
on the receiver

Establishing a radio link between the remote control (transmitter)
and the receiver:

WARNING

The receiver should be opened only by either a qualifi ed electrician or
the manufacturer›s service technician.

All safety precautions listed in the receiver‘s operating instructions 
must be observed.
The receiver should not be left unattended when open (unqualifi ed 
persons, especially children, should be prevented from gaining
access to the equipment).

On the receiver, briefl y press the “Memo” button for the relevant 1.
channel (1)

the LED then fl ashes. Â

Remove the rotary adjuster knob on the remote control and press 2.
the button thereunder (2, 3).

The red lamp then fl ashes and a confi guration signal is Â
sent.
On the receiver, the LED for the relevant channel then Â
lights up constantly and indicates the switching condition
of the output (lit = ON, not lit = OFF). The connection
between the thermostat and the receiver isesta blished.

Wait a minute until the addressing of the system has fi nished.3.
Carry out a test: on the remote controle, choose fi rst the maximum, 4.
then the minimum setting and check if the channel is being
activated accordingly.

15

10

2

3

1

B11719

Fig. 3 Addressing the transmitter code on the receiver

Selecting the mode6

B11690

Use the rotary switch on the remote control
unit to select the mode. (Auto, Comfort, Eco,
Frost Protection, Climate).
The attached channels adapt your mode
according to your choice.

Selecting the modeFig. 4

. . .

© Fr. Sauter AG
Im Surinam 55
CH-4016 Basel
Tel. +41 61 - 695 55 55
Fax +41 61 - 695 55 10
www.sauter-controls.com
[e-mail]

Printed in Switzerland

2/2 0505990003 B

Automatic mode

Installation with programmable radio •
remote control (LXT340): the installation
operates according to the selected
programme.

Installation without remote control •
(LXT340): the installation operates
continuously in Reduced mode.

Comfort mode

Continuous comfort mode, control according
to the settings of the remote control units in
the individual rooms, e.g. 20 °C.

Reduced mode
(eco)

Continuous reduced mode, control according
to the settings of the thermostats in the
individual rooms minus 3.5 °C. (Example: if
Comfort = 20.5 °C, then Eco is 20.5 °C - 3.5
°C = 17 °C). This mode lets you reduce the
temperature without having to change the
setpoint for Comfort mode.

Frost protection

Control according to a fi xed setpoint (8 °C).
This mode offers protection against frost
damage during lengthy absences in winter.

Climate

Climate control (e.g. underfl oor heating or
cooling) according to the settings of the
remote control units in the individual rooms,
e.g. 23 °C.

ModesTa b. :

What to do if...7

the LED does not light up during transmissions between the Â
transmitter and the receiver?

the batteries are fl at, or the wrong batteries were inserted: 
replace both batteries, only use type LR03 1.5 V alkaline
batteries.

the LED fl ashes continuously? Â

the batteries will soon be fl at: replace both batteries, only use 
type LR03 1.5 V alkaline batteries.

the installation does not start up, or does not run Â
continuously?

the power supply to the receivers has been interrupted: check the 
mains fuse or protective switch.

the power supply to the receiver is interrupted? Â

check the mains fuse or protective switch. 

the receiver is outside of the transmitter‘s range? Â

move the receiver close enough. 

the receiver does not recognise the transmitter code? Â

carry out addressing on the receiver. 

the receiver is subject to interference? (e.g. from amateur Â
radio users, TV screens or mobile phones)

try to move the source of interference or the receiver. 

the transmitter is subject to interference? Â

move the transmitter outside of the range of the interference. 

Technische Daten8

Power supply 2 alkaline batteries LR03 1.5 V
Power
consumption

8 µA ruhend, 15 mA beim Senden

Time interval for
transmission

1 minute after a change in the setpoint,
repeated every 4...10 minutes. Transmitter
(frequency 868.3 MHz

Standards

Radio:
RTTE immunity:
RTTE radiation:

EN 300220
EN 301489-3
EN 300220-3

Ambient
conditions:

operation: between 0°C and 60°C•
humidity: 25°C 80% (without condensate)•
IP 20 (EN 60529)•

NOTICE

Important: this remote control unit is a component of the complete
radio system, and is intended for use with „intelligent”
24 V AC receivers