Danfoss EFET 535 Installation Manual
MAKING MODERN LIVING POSSIBLE
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EFET™ 535
Installation Manual
Danfoss Heating
This manual is only to be used by a
Warning!
professional installer to install and
set up the thermostat properly.
It is not intended for the end-user!
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Congratulations with…
... your Danfoss floor heating system
Your property has been installed with a Danfoss electric floor
heating system. Danfoss is Europe’s leading floor heating
manufacturer, with over 45 years experience. We are confident that you will be satisfied with your new system.
Danfoss brings you…
An Invisible heating solution - A concealed heat source opens
up greater opportunities for decorating and furnishing.
Optimum comfort - Danfoss brings you the luxury and
comfort of a warm floor as well as a pleasant room temperature. Floor heating is the most comfortable type of heating
because it is based on the fact that warmth travels upwards;
pleasant warmth for your feet, body and head.
Low running costs – Thanks to the precise Danfoss thermostat and the placement of the heating elements right under
the floor surface the heat can be controlled optimally in
order for you to have the comfort you desire with minimal
energy use. Moreover electric floor heating is practically
maintenance free, in total keeping down the running costs.
A long lasting solution - We back-up our floor heating solutions with a ten year guarantee on all our mats and cables,
and a two year warranty on our thermostats. Practically
speaking you can count on Danfoss heating cables and mats
lasting as long as the house in which they are installed – and
that is without having to maintain them.
Hygiene - As Danfoss produce floor heating systems, only
very gentle air is circulating, and the amount of travelling
dust particles is reduced considerably; a great relief for
people with allergies or asthma. There are also no dangerous
fumes such as carbon monoxide generated by the system.
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Table of content
Table of content
Install & configure the thermostat . . . . . . . . . . . . . . . . . . . . . .4
Placement of EFETTM 535 ...........................4
Installation of EFETTM 535 ..........................5
User’s guide to EFETTM 535 . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Introduction .................................... 10
Display, icons and buttons . . . . . . . . . . . . . . . . . . . . . . . 10
Increase / decrease preferred temperature. .......11
Using the timer function ......................... 12
Settings ......................................... 14
Setting the time ..............................16
Setting the weekday.......................... 17
Setting the timer periods ..................... 18
Setting the comfort temperature .............19
Setting the savings temperature .............. 19
Setting the minimum floor temperature limit.. 19
Special features.................................. 20
Childproof mode ............................. 20
Frost protection mode........................ 20
OFF mode.................................... 21
Restore timer default settings................. 21
Switching displayed temperature .............22
Trouble shooting ................................ 23
Technical Specifications ............................. 24
Disposal Instruction.................................. 25
The Danfoss Guarantee .............................. 26
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Install & configure the thermostat
Placement of EFETTM 535
When EFETTM 535 is used as a room
sensor, installation height should typically be
between 80-150 cm.
In wet rooms it should be installed on an even
surface, according to local building regulations.
At least 50 cm away from windows/doors that
will be left open occasionally.
Not on a wall where it will be subjected to
direct sunlight.
Not on the inner side of a wall facing the
outside.
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Installation and connection
Installation of EFETTM 535
1. To remove the front cover, gently press the release tabs
under the bottom of the thermostat with a screwdriver.
Then remove the front.
Removing the front cover and
pushing the installation button,
is not intended to be done by
anyone else but a qualified
installer!
2. Connect the thermostat according to the connection
diagram
Mains
180-250V~
N L
N
Load
Max.
Load
15 A
N
L
L NTC
Load
Sensor
NO
CONNECT
The screen of the heating cable must be connected via a
terminal strip to the earth wire of the supply cable.
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Choose sensor combination
3. Choose sensor combination
When installing the EFET™ 535 you need to choose
the type of heating and thus which sensors should be
used. You have three options:
Comfort heating: Constant temperature on the floor in
bathrooms and other rooms where a comfortable warm
surface is required.
Install the Floor sensor and choose only the Floor sensor.
Total heating: Control of room temperature in living
rooms etc. Install the Floor sensor and choose both
Floor sensor and Room sensor.
No floor sensor: A floor sensor is not present, and
cannot be installed. Choose Room sensor. (Not
recommended).
Be aware that without a floor sensor, the temperature
control can be less accurate, and overheating of the
floor is of higher risk.
Danfoss recommends that a floor sensor is always
installed.
When the thermostat is used to control a floor heating
element according to EN/IEC 60335-1 and
EN/IEC 60335-2-96, always use the floor sensor
and never set the temperature limit above 35°C.
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Configuration - sensor
Selection of sensor type
Power on the thermostat.
With the front off, with a small screwdriver, pencil, or needle press the
installation button.
Select the sensors to be used for the
heating system:
EFETTM 535 is able to use two
sensors:
- a built-in room sensor
- an external sensor to be placed
in the floor.
This gives 3 options:
floor sensor.
room sensor.
both room and floor sensor.
Always use floor sensor or a room
+ floor sensor combination when
used to control floor heating
The default is
To change this setting, press • and
use the arrow buttons ▲▼ to select
your choice. Press • to accept your
choice.
If you have selected room sensor
only, the installation procedure is
complete. Press installation button
to accept. (Go to page 9).
If you have selected floor sensor or a
combination of room- and floor sen-
sor press ▲▼ for the next setting.
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Configuration - Max. floor temp.
Maximum floor temperature.
When selecting either floor
sensor or floor and room
sensors, next screen is maximum
floor temperature.
Default setting is 35°C.
To change this setting, press • and
use the arrow buttons ▲▼ to select
your choice. Press • to accept your
choice.
If you have selected a combination of
room and floor sensor, the installation procedure is complete.
Press installation button to accept.
(Go to page 9)
If you have selected floor sensor only
press ▲▼ for the next setting.
When the thermostat is used to control a floor heating
element according to EN/IEC 60335-1 and
EN/IEC 60335-2-96, always use the floor sensor
and never set the temperature limit above 35°C.
Notice:
The floor temperature is measured where the sensor is
placed. The temperature of the bottom of a wooden floor
can be up to 10 degrees higher than the top. Floor manufactures often specify the max. temperature on the top
surface of the floor.
Please contact your floor supplier for maximum surface
temperature.
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Configuration - Scale
Scale
If you select EFETTM 535 to only use
a floor sensor, mode , you have to
select the display type. The choice is
either numerical scale 1-6 or Celcius
scale 5° to 45°.
Default is Celcius scale. When selecting Celcius, the display will show
the actual temperature at the floor
sensor.
To change this setting, press • and
use the arrow buttons ▲▼ to select
your choice.
Press • to accept your choice.
The installation procedure is now
finished.
You can use the ▲▼ for going back or
forward through the settings.
Otherwise:
Press the installation pinhole to exit
installation mode.
4. Put the frame and front back on.
Initially mains supply the thermostat for 15 hours to
fully charge the battery. The current time and day
is then kept for 80 days if mains supply is off.
All other settings are stored permanently.
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