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A

B

C

D

E

F

H

I

G

Product program
This user manual covers following thermo-
stats with built-in GFCI
LXstat-420 Incl. 

fl oor sensor 3m

LXstat-421  

With built-in room 
sensor

Introduction
The thermostat is an electronic on/off ther-
mostat for control of temperature by means 
of an NTC sensor either placed externally 
or internally in the thermostat. The thermo-
stat has integrated a Ground Fault Circuit 
Interrupter (GFCI, Class A). The thermostat 
and the GFCI is a dual model suitable for 
120/240 V 50/60 Hz supply.

The thermostat type LXstat-420 has an 
external temperature sensor that is normally 
placed in the fl oor construction. In this con-
fi guration the thermostat
controls the temperature of the fl oor and 
not the temperature within the room. The 
thermostat type LXstat-421 has a built-in 
temperature sensor. In this confi guration the 
thermostat controls the temperature of the 
room.

The thermostat has two adjustable set 
points, one for the day operation and one 
for the night setback temperature. Switching 

between the two set points is easily done 
with one push at the OK (   ) button.

The temperature can be displayed in eigher 
°C or in °F. Switching can be done on the pin 
button marked with (   ) 

The thermostat has a pin button marked R, 
allowing you to reset the thermostat to fac-
tory settings. These are listed at the end of 
this manual with space for you to record your 
settings.

1. Getting started

Buttons

A:  Reset of GFCI
B:  Red light indicating ground fault
C:  Test of GFCI
D:  Pin button ºC / ºF
E:  Display
F:   Reset to factory setting
G:  Adjustment down
H:  OK - accept
I:   Adjustment up

Содержание LX 420

Страница 1: ...Table of contents English 2 Fran ais 5 USER MANUAL LX 420 421 088L3353 01 01 57470...

Страница 2: ...erature of the floor and not the temperature within the room The thermostat type LXstat 421 has a built in temperature sensor In this configuration the thermostat controls the temperature of the room...

Страница 3: ...Night Setback temperature To change the temperature press UP or DOWN to increase or decrease the tempera ture The display will flash for 5 seconds and will then show the new temperature setpoint OFF T...

Страница 4: ...tton there could be a ground fault To check whether it is a ground fault or a nuisance tripping press RESET If this cause the red light to shot off and not comes on again it was a nuisance tripping an...

Страница 5: ...stat LXstat 421 est dot d un capteur de temp rature int gr Dans cette configuration le thermostat con tr le la temp rature de la pi ce Le thermostat dispose de deux points de consigne r glables un pou...

Страница 6: ...p rature appuyez sur les touches de d filement vers le haut ou vers le bas respectivement pour lever ou abaisser la temp rature L affichage clignotera pendant cinq secondes puis indiquera le nouveau p...

Страница 7: ...rmale Si le test choue v rifiez le c ble chauffant et le ther mostat Le test du disjoncteur de fuite la terre devrait tre effectu mensuellement Si le disjoncteur se d clenche en mode de fonctionnement...

Страница 8: ...ermostat de 0 40 C 32 104 F GFCI 35 65 C 31 149 F Danfoss can accept no responsibility for possible errors in catalogues brochures and other printed material Danfoss reserves the right to alter its pr...

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