Danfoss EFIT 540 User manual

INSTRUCTION

Thermostat EFIT 540/550

Table of contents

Introduction................................................................... 3

Introducing Thermostat EFIT 540/550 .......................... 4

How to use your Danfoss heating system .................... 6

Daily operation .............................................................. 7

Setting the clock & day ................................................. 10

Timer programming....................................................... 11

Warranty........................................................................ 16

Do not cover the thermostat, e.g. by hanging towels etc.

directly in front of it !

088L0358 - 01.01 09-2003

Introduction

You have purchased a Thermostat EFIT 540/550, which

forms an integrated part of a Danfoss system.

Danfoss has developed the Thermostat EFIT 540/550 to

make your ﬂoor heating an even more environmentally

correct way of heating your home.

Thermostat EFIT 540/550 will work dynamically with both

the room and ﬂoor temperature in order to give you the

highest possible comfort in the most economical way.

Thermostat EFIT 550 ONLY:

Furthermore, Thermostat EFIT 550 will take a few days to

optimise the use of the heating system, but it does not stop

there. The Thermostat EFIT 550 will continue to learn from

the room and thus constantly improve its performance and

consequently your comfort and economy.

We wish you many years of comfort with your new Danfoss

system.

Introducing Thermostat EFIT 540/550

Thermostat EFIT 540 is an advanced temperature

controller, with a built-in Timer.

Thermostat EFIT 550 ONLY:

Thermostat EFIT 550 is an adaptive temperature controller,

specially designed for ﬂoor heating systems.

The Thermostat EFIT 550 will measure the radiant comfort

from the ﬂoor combined with the comfort from the air

temperature in the room to offset the outside weather

condition.

We as human beings perceive comfort as the combined

effect of the radiant heat from the ﬂoor and air temperature

in the room. By continually measuring this combined effect,

it is therefore possible to maintain the highest possible

comfort level.

A higher ﬂoor radiant temperature can produce a sense of

comfort with a lower air temperature which can result in

lower running costs without reducing comfort levels.

All this means that as soon as you have set your

Thermostat EFIT 550 at your desired comfort temperature,

you do not have to do anything else. Thermostat EFIT 550

will automatically adjust the heating to meet your

requirements for comfort and economy, no matter how the

weather is changing outside.

This also means that Thermostat EFIT 550 is capable of

detecting a sudden temperature drop in the room. Instead

of switching the heating on to immediately compensate,

the Thermostat EFIT 550 uses the information stored then

checks to see if this is caused by e.g. the effects of a

window opened for 10 minutes !

Even the programming of economy temperatures (i.e.

during the night) is very simple. You do not have to cal-

culate how much earlier the heating should start in order

to reach a speciﬁc temperature at a speciﬁc time. Just

tell the Thermostat EFIT 550 when you want the comfort

temperature and the Thermostat EFIT 550 will take care of

the rest. By learning the rate of heat loss from the room, the

Thermostat EFIT 550 knows when to start heating in order

to achieve the selected temperature at exactly the right

time.

How to use your Danfoss heating system

The function of the button

The button can be turned both ways, is indicated by

or the button can be pressed/held, is indicated by

View of symbols in the display

Symbol for frost

protection

Symbol for Timer On

Numerical display

for time, tempera-

ture, text, etc.

Flashing point for

actual time

Weekdays

Indication of

AM/PM time at

12 hour clock

Symbol for Timer programming

Symbol for

setting of clock

24 hour clock-ring

which shows

actual time and

timer programme

Symbol for degrees

Symbol for

temperature

below set-point

Daily operation

Thermostat EFIT 540/550 has two temperature settings:

Constant temperature with the timer off.

Can be used e.g. as ‘Party Mode’ or for

constantly lowering the temperature when

going on holiday. This is indicated by a

continuous clock ring ...

Timer setting with automatic switching

between economy and comfort tem-

perature.

Clock and timer must be set !

Is indicated by the timer symbol

and the clock ring showing the timer

programme ...

(Display will indicate same temperature during both com-

fort and economy periods. But temperature will, during

economy periods, be lowered according to the set-back

level.)

You want to raise the temperature ...

Turn clockwise to raise the tempera-

ture.

You want to lower the temperature ...

Turn counter-clockwise to lower the

temperature.

You want to switch on or off the timer

function ...

Press the button to switch on the

timer.

Press again to switch off the timer.

Economy set-back

between 0000 and 0700

The clock is between

1000 and 1030

The marking on the clock-ring indicates

when comfort temperature is chosen

and when economy set-back is

switched on. A ﬂashing point indicates

the actual clock (every half hour).

If the temperature is lowered to mini-

mum (+5ºC), a frost symbol will appear

in the display, indicating that the ther-

mostat will maintain minimum +5ºC in

the room for frost protection.

If the temperature is turned below

+5ºC, the thermostat will switch off.

(Only possible with the timer off).

When the temperature is raised again

the thermostat will automatically

switch on.

If the Thermostat EFIT 540/550 only

uses a ﬂoor sensor, the display will

not show the actual temperature (5º to

35º), but a scale from 0 to 10.

Setting the clock & day

You want to set/change the clock ...

(The clock is not set from the factory)

Hold the button for 3 sec.

The clock can now be set forward or

back by turning the button to the right

or left respectively.

Changing the week day is done by

continuing to change the time until it

passes 0:00, either way.

The numbers 1-7 do not correspond to

any speciﬁc days, so you can choose

which day of the week is No. 1 etc.

When the clock is set correctly, press

the button to save the settings.

3 sec.

Timer programming

You want to set/change the

economy set-back programme ...

(The timer is not set from the factory)

Hold the button for 6 sec.

The programme for economy

set-back can now be edited.

First, turn the button to choose the

weekday which you want to

programme ...

Press the button to start the

programming ...

6 sec.

This manual suits for next models

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