Devil DEVIREG 550, DEVIREG 540 User Manual

Underfloor Heating (UK)

Industrial - Commercial - Domestic

Unit 7, Edison Close

Ransomes Europark

Ipswich, Suffolk IP3 9GU

United Kingdom

Devireg 540/550

Thermostat controller working with both
room and oor temperatures

www.underoorheating-uk.co.uk

Installation Guide

Product Manual

Edison House

(t) 01473 27 66 77
(f) 01473 27 66 78

Table of contents

Installation of devireg™ 540/550 4

Activating devireg™ 540/550 13

Change of basic setting 15

Factory settings 23

Network 24

Error messages 26

Technical specications 28

Connection diagram 29

Please Note:
The devireg™ 540/550 must be connected and the basic
setting must be done by an authorised electrician.
In-appropriate installation and basic setting may cause
damage to the heating system or oor construction.

3

Installation of devireg™ 540/550:

When installing devireg™ 540/550 you must
rst dismantle the thermostat.
Remove the front cover by gently pressing the
release tab in the top (center hole), and lift out
the cover.

Release tab

4

Remove the two screws, one in each side, and
gently pull off the display module.

Screws

5

Remove the frame from the thermostat.

Frame

6

Connection of the thermostat must be carried
out as shown below.

Heating element
Max. load 16 Amp.

Mains supply
180-250 V
50/60 Hz

devireg™ 550 ONLY

NTC sensor

Network

connection

As the devireg™ 540/550 is not equipped with an earth
terminal, the earthing screen of the heating cable must be
connected to the earth from the supply via the earthing
terminal in the surface mounted box or the recessed metal
box which ever is used.

7

When installing the devireg™ 540/550 you need to choose
the type of heating and thus which sensors should be used.

DEVI™ recommend always to install the floor sensor !

Comfort Heating:

- Constant temperature on the oor in e.g. bathrooms and
other rooms that are often used with bare feet.

- Install the Floor sensor and choose only the Floor sensor
in Basic Settings.
Total Room Heating:

- Control of room temperature in living rooms etc.

- Install the Floor sensor and choose both Floor sensor and
Room sensor in Basic Settings.
No Floor Sensor:

- A oor sensor is not present, and cannot be installed.

- Choose Room sensor only in Basic Settings.

- Be aware that temperature control is less accurate without
the oor sensor. DEVI™ recommend that a oor sensor is
installed.

Do NOT use devireg™ 540/550 without floor sensor
when the heating element is installed on or beneath
wooden surfaces !

8

You can now mount the thermostat in the wall,
by using any of the eight screw holes in the
base module.

Screw holes

9

For getting the best possible result when using
the devireg™ 540/550, the thermostat should
be installed in the wall, following a few basic

-

rules:

-

Installation height, typically between 80-150 cm.

-

On a wall NOT facing the outside.
On a wall where it will NOT be subjected to

-

direct sunlight.
Away from windows/doors that will be open

-

occasionally.
On a wall where it will NOT be covered by
curtains, towels etc. hanging in front of the
thermostat.

Warning (devireg™ 550 ONLY):
Please note, when working on thermostats
connected to a network, ensure that the
mains supply for all thermostats in the net­work is disconnected before the work is
started.

10

Reassemble the thermostat by rst placing the
frame, then mount the display module and
nally press the front cover into place.

Note:
The display must be gently remounted on the
base module, ensuring that the 8-pin plug is
placed accurately by using the four tabs sur­rounding it.

When remounting the two screws in the side,
please DO NOT over tighten them.
They just need to be barely fastened.

11

DO NOT over tighten !

12

Activating devireg™ 540/550

When the thermostat is connected to
the mains voltage for the rst time,
a code must be chosen and the
sensor(s) selected.

Turn to choose code ...

Choose the code: 0044

When the code is chosen, press the
button ...

Now the sensors to be used, should
be selected ...

13

devireg™ 540/550 is able to use two
sensors, one built-in sensor plus an
external sensor which can be placed
in the oor.
Choose the sensor(s) which will be
used for this heating system.

Turn to choose Room Sensor (r S),
Floor Sensor (FS) or both Room and
Floor Sensor (rFS), and press ...

(If the thermostat only uses a oor
sensor, the display will not show the
actual temperature (5º to 35º), but a
scale from 0 to 10).

Always use a floor sensor when the
heating element is installed on or
beneath wooden surfaces !

14

Change of basic setting

If it is necessary to change the basic
setting, the button must be held for
12 sec.

It is then possible to access the basic
setting menu by choosing the code !

Turn to choose code ...

Choose the code: 0044

When the code is chosen, press the
button ...

12 sec.

15

devireg™ 550 ONLY:

The rst function to choose in the
basic setting is whether devireg™
550 must operate Alone or as Master
or Slave thermostat.
If several thermostats are linked in
one network, only one of the thermo­stats can be choosen as Master !

For further information about network
and Master/Slave, see section on
page 24.

Turn to choose Alone (ALO), Master
(MAS) or Slave (SLA), and press ...

Please note !
If Slave is chosen, not all settings in
the Basic Setting will appear.
The settings left out can be set from
the Master unit.

16

Choose whether the thermostat must
show Celcius or Fahrenheit degrees.

Turn to choose Cº or Fº, and press ...

17

devireg™ 540/550 is able to use two
sensors, one built-in sensor plus an
external sensor which can be placed
e.g. in the oor.
Choose the sensor(s) which will be
used for this heating system.

Turn to choose Room Sensor (r S),
Floor Sensor (FS) or both Room and
Floor Sensor (rFS), and press ...

(If the thermostat only uses a oor
sensor, the display will not show the
actual temperature (5º to 35º), but a
scale from 0 to 10).

Always use a floor sensor when the
heating element is installed on or
beneath wooden surfaces !

18

Due to different oor constructions it
is possible to choose a maximum oor
temperature (Mt) in the oor which
cannot be exceeded.
The temperature range is 20ºC to
50ºC.

Turn to choose maximum oor tem­perature, and press ...

Please note !
Maximum oor temperature is preset
from the factory to 45ºC for cable temperature safety.
Local building regulations must be observed, when chang­ing the maximum preset temperature.
For wooden oor constructions DEVI™ recommend to limit
the temperature to maximum 27ºC.

Max. tempera­ture setting for
different oor
constructions !

Tiles on chipboard
Carpet/vinyl on chipboard
Wooden oors (parquet, plank, etc.)
Other (concrete, screed, etc.)

27ºC
35ºC
27ºC
45ºC

19

Offset (OFFS) can be used to adjust a
variation between the thermostat and
a thermometer in the room, if any.
If the thermometer shows e.g. 1ºC
more than the thermostat, it is pos­sible to adjust the offset with +1ºC.
The range is -5.5ºC to +5.5ºC.

Turn to choose offset, and press ...

20

In connection with the built-in Timer,
the thermostat can be programmed
to lower the temperature (LO), e.g.
during the night.
The range is 0ºC to -15ºC.

Turn to choose economy set-back
level, and press ...

(Choose -5ºC if the temperature must
be lowered 5 degrees).

If normal room heating is installed we
recommend not to lower the tempera­ture at night with more than approx.

-5ºC.

21

Finally, the type of clock must be set.
Choose whether the clock must be 24
hours or 12 hours AM/PM.

Turn to choose 12 or 24 hours, and
press ...

To nish the basic setting, press the
button, and the display will return to
the daily operation menu.

22

Factory setting:

The thermostat is preset with the following parameters:

Operation Factory setting Choices

Network type Alone Alone, Master or
(devireg™ 550 ONLY) Slave

Temp. display Cº Cº or Fº
Sensor Room + oor Room, oor or
room + oor
Max. oor
temperature +45ºC +20ºC to +50ºC
Offset 0.0ºC -5.5ºC to +5.5ºC
Economy set-back -5ºC -1º to -15ºC
Weekday 1 1, 2, 3, 4, 5, 6, 7
Clock 24 12 hours AM/PM
or 24 hours
Time --:-- --:-­Timer settings - Up to 336/week

23

Network connections (devireg™ 550 ONLY):

The devireg™ 550 features a network capability.
All devireg™ 550’s installed in a building can be linked
together via the network facility, giving the possibility of
central adjustment of programming and parameters e.g.
clock setting.

The network can include up to 32 units, i.e. 1 master and
up to 31 slave units.
It is only possible to have one master unit.

A devireg™ 550 can be set as a stand alone unit, even
though it is connected to the network. It will not respond to
or send information to a master unit, but it will count as one
of the maximum 32 units in the network.

The network is a seperate two wire net, where the cables
are unshielded, untwisted and unpolarised for easy installa­tion.
The maximum length of the network cables are up to 500
metres.

24

If more master units are congured on the network, an error
message will ash in the display, and the unit will need to
be recongured.

If a devireg™ 550 is congured as a slave unit, the follow­ing set-up parameters are controlled from the master unit:

• Time

• Day of week

• Cº or Fº

• 12 hour AM/PM or 24 hour clock

• Set back program

Network accessories:

Network cable
15881150

Single core 0,75 mm²
(100 m)

25

Error messages:

devireg™ 540/550 has a built-in system that constantly

checks the heating system, the thermostat itself and a pos­sible network for any malfunctions.
If an error occurs, the display will ash together with a
reading of the detected fault, which will be shown indicated
by the weekday numbers 1 to 7:

Fault:

No:

Clock is not adjusted

7

The thermostat is

4

switched off because of
overheating

Congured as a Slave,

3

but cannot nd any
Master unit

26

What to do:

Set the clock

Let the thermostat cool for
a period.
Then enter basic setup to
leave fault mode

One unit must be cong­ured as Master

Fault: What to do:

No:

2

Congured as Master,
but can detect another
Master unit

6

Sensor fault
oor sensor open circuit

5

Sensor fault
oor sensor shortcircuit

Only one unit may be con­gured as a Master

Change the oor sensor

Change the oor sensor

27

Technical specifications:

Temperature range:

Floor temperature limit:

Voltage:

Resistive load:

Inductive load:

Power consumption:

Battery back-up:

Economy set-back:

Offset:

IP class:

Type of sensor:

Sensor value:

28

+5º to +35°C or OFF

+20º to +50ºC

180 - 250 V ~ 50/60 Hz

250 V ~ 16 A

1 A (power factor 0.3)

< 500 mW

100 hours

0º to -15ºC

-5.5º to +5.5ºC

IP 30

NTC

15 kOhm / 25ºC

Connection diagram:

devireg™ 550 ONLY

Network

connection

29