Installation Guide
DEVIreg™ Opti
Electronic Timer Thermostat fulfilling
Eco Design Directive
www.DEVI.com
DEVIreg™ Opti
Table of Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
2. Technical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . 3
3. Safety Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4. Mounting Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5. Display Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6. Configuring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7. Settings & Break out . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
8. Disposal Instruction . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
9. Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
1 Introduction
DEVIreg™ Opti is an electronic programmable timer
thermostat used for controlling electrical floor heating
elements. The thermostat is designed for fixed installation
only and can be used for both direct heating of the entire
room and for comfort heating of the floor. Among others,
the thermostat has the following features:
Installation Guide2
DEVIreg™ Opti
• A screen display operated by buttons.
• An easy-to-follow, menu driven programming and
operation.
• Pre-installed timer settings.
• Offered with integrated frame.
• Using DEVI standard NTC floor sensor (15 k Ohm at 25°C).
• Open window detection.
• Low stand-by energy consumption.
• Weekly timer.
More information about this product can be
found at: devi.com
2 Technical Specifications
Operation voltage 220-240 V~, 50Hz
Standby power consumption Max. 0,5 W
Relay:
Resistive load
Inductive load
Max. 13 A / 2990 W @ 230 V
Max. 1 A cos = 0,3
3Installation Guide
DEVIreg™ Opti
Sensing units (floor sensor) NTC 15 kOhm at 25°C (Default)
Sensing values:
0°C
20°C
50°C
Control PWM (Pulse Width Modulation)
Cable specification max. 1x4 mm2 and 2x2,5 mm
Ambient temperature 0° to +35°C
Frost protection temperature 5°C to +9°C (default 5°C)
Temperature range Room temperature: 5-35°C.
Sensor failure monitoring The thermostat has a built-in
Ball pressure test temperature 75°C
Pollution degree 2 (domestic use)
42 kOhm
18 kOhm
6 kOhm
2
Floor temperature: 5-45°C.
Max. floor: 20-35°C (if unrecoverable seal is broken then up to 45°C).
Min. floor: 10-34,5°C, only with
combination of room and floor
sensor.
monitoring circuit, which
will switch off the heating if
the floor sensor is disconnected
or short-circuited
Installation Guide4
DEVIreg™ Opti
Controller type 1B
Software class A
Storage temperature -25°C to +60°C
IP class 21
Protection class
Dimensions 85 x 85 x 44 mm
Weight 138 g
Class II -
(in-wall depth: 24 mm)
Electrical safety and Electro-Magnetic Compatibility for
this product is covered by the compliance with the EN/IEC
Standard “Automatic electrical controls for household and
similar use”:
• EN/IEC 60730-1 (general)
• EN/IEC 60730-2-9 (thermostat)
3 Safety Instructions
Important: When the thermostat is used to control a
floor heating element in connection with a wooden floor
or similar material, always use a floor sensor and never set
the maximum floor temperature to more than 35°C.
5Installation Guide
DEVIreg™ Opti
Make sure the mains supply to the thermostat is turned
off before installation.
Please also note the following:
• The installation of the thermostat must be done by an
authorized and qualified installer according to local
regulations.
• The thermostat must be connected to a power supply
via an all-pole disconnection switch.
• Always connect the thermostat to continuous power
supply.
• Do not expose the thermostat to moisture, water,
dust, and excessive heat.
• This thermostat can be used by children aged from 8
years and above and persons with reduced physical,
sensory or mental capabilities or lack of experience
and knowledge, if they have been given supervision
or instruction concerning use of the appliance in a
Installation Guide6
DEVIreg™ Opti
safe way and understand the hazards involved, by a
person responsible for their safety.
• Children should be supervised to ensure that they do
not play with the thermostat.
• Cleaning and user maintenance shall not be made by
children without supervision.
4 Mounting Instructions
Please observe the following placement guidelines:
Place the thermostat at a suitable height on the
wall (typically 80-170 cm.).
The thermostat should not be placed in wet
rooms. Thermostat must be placed outside zone
2. Place it in an adjacent room and use floor sensor only. Always place the thermostat according
to local regulation on IP classes.
Do not place the thermostat on the inner side of
a poorly insulated exterior wall.
7Installation Guide
DEVIreg™ Opti
12
Always install the thermostat at least 50 cm from
windows and doors, due to draft, when using
regulation in: floor and room mode or room
alone mode.
Do not place the thermostat in a way that it will
be exposed to direct sunlight.
Note: A floor sensor is recommended in all floor
heating applications and mandatory to thin
matsand under wooden floors to reduce the risk
of overheating the floor.
• Place the floor sensor
in a protecting plastic
conduit in the floor
construction in an appropriate place, where
the floor is not exposed
to sunlight or draft
from door openings.
≥
• Equally distant and >2 cm from the heating cables on
both sides.
Installation Guide8
DEVIreg™ Opti
• The conduit should be flush with the floor surface, coun-
tersink the conduit if necessary and possible.
• Route the conduit to the connection box.
• The bending radius of the conduit must be min 50 mm.
Follow the steps below to mount the thermostat:
1. Unpack thermostat
2. Remove the front cover as showed
on Pic. 1.
3. Connect the thermostat accor-
ding to the connection diagram.
The screen of the heating cable
must be connected to the earth
Made in P.R.C.
conductor of the power supply
cable by using a separate connector.
Note: Always install the floor sensor in a conduit in
the floor.
S2 S1 L
Max Load
13(1) ASensor
Danfoss A/S, 6430 Nordborg, Denmark
IP21
0T35
Ambient Temperature: 0-35°C
Standby maximum 0.5W
DEVIreg™ Opti
Pic. 2
Pic. 1
N
N
LOADLLOAD
Mains 220-240V~
50Hz
9Installation Guide
DEVIreg™ Opti
4. Fasten the thermostats back part
firmly to a flush mounted wall box
or an exterior wall box by driving
the screws through the holes in
each side of the thermostat.
5. Click the front part module in
place. Pay attention, in relation to
the female header, in not to bending the connectors. Press carefully
until the frame is fixed firmly.
When mounting and reassembling the thermostat.
Pic. 3
Pic. 4
Important: Do NOT press in the center of the display
screen.
Battery:
The current time and day is kept for min. 60 days if mains
supply is off. All other settings are stored permanently.
Installation Guide10
DEVIreg™ Opti
5 Display Symbols
Top part main functionalities are to support user interface
through display and hold all the controller logic.
Display main functionalities are to show the current status
of the Thermostat and recognize the user actions from the
buttons. Display consists of different buttons, numbers and
symbols.
Nr. Type Description
ON/OFF
button
Arrow Up /
Down button
1
2
3 Mode button
4 Timer button
11Installation Guide
DEVIreg™ Opti
Symbol indications
Symbol Description Symbol Description
Week Day Heating is ON
Time Display,
24 Hour
Floor
Temperature
Room
Temperature
Away Mode
Timer Mode
Manual Mode Alarm/Error
Frost Protec-
tion Mode
Periode Symbol
at timer mode
Safety Lock
Open Window
Current Tem-
Comfort Tem-
Temperature
The shorter line
indicates the
current period.
Installation Guide12
indication
perature
perature
Economy
DEVIreg™ Opti
Interaction directly on thermostat
Function Button Description
Turn thermo-
stat on / off
Setting of
different
modes
Adjust
temperature
Activate button:
Hold for 2 sec.
Activate button:
Up: activation button
Down: activation
button
Thermostat switch on
and display current
temperature and other
settings
Display cycles through
following modes:
Timer / Manual / Away /
Frost protection
Increases active mode/
temporary set point
Decreases active mode/
temporary set point
Floor tem-
perature
Activate simultane-
ously buttons
Hold 8 sec.: Display shows
current floor temperature.
Floor temp.
icon appears.
From timer, manual, frost
mode
13Installation Guide
DEVIreg™ Opti
Safety lock
Factory
restore
Setting timer
mode
Activate simultane-
ously buttons
Activate simultane-
ously buttons
Activate button
To Activate/Deactivate
safety lock, hold for 8 sec.
Safety lock
icon appears.
Turn thermostat OFF, hold
for 10 sec. 5 sec. count
down appears.
Display cycles through
timer setting modes.
Activates in all modes.
To save energy, when no interaction from user for >20 sec.,
thermostat will go into a stand by mode, where currently
measured temperature is displayed continuously. Interaction
from user, by pushing any of the buttons, will reactivate the
display (On/Off button, push and hold for 2 sec.).
Error codes
When the error occurs, the heating is turned off. When error
is resolved the thermostat, in some cases, will require a
restart to start heating again.
Installation Guide14
DEVIreg™ Opti
Error type N r. Description Solution
Floor Sensor
short circuited
Floor Sensor
disconnect
Room or Floor
Sensor short
circuited
Room or Floor
Sensor
disconnect
Battery
missing
Floor sensor is measuring
E1
E2
E3
E4
very high temperature
Floor sensor is measuring
very low temperature
Sensor is measuring too
high temperature (>50°C).
Sensor is measuring too
low temperature (<0°C).
Battery is missing or needs
values.
values.
a replacement
Contact service
Is floor sensor
connected?
Contact service
Turn Off. Cool
down. If persist,
contact service.
Turn Off and
On. If persist,
contact service.
Contact
service
6 Configuring - Start up
Setting time
When the thermostat is connected first time, it will open a
start up wizard (for further description see following pages).
15Installation Guide
DEVIreg™ Opti
When unit is On (any of the modes) press Timer
button (once), "hh:mm" will start to blink.
Adjust the "hh" value with Up & Down buttons,
than when reached the desired value press
Timer button to move to "mm" (minutes).
Set the "mm" value with Up & Down buttons,
than when reached the desired value press
Timer button to move to Weekday.
Adjust the Weekday with Up & Down buttons.
Press the Timer button again, to confirm.
Timer programming
The thermostat comes with 3 preset programs (P1, P2 and
P3). Default is set to program P3. Programs can be changed
with Up and Down arrows (P3->P2->P1).
The values in the programs (time and temperature) can
be adjusted, see the following page. For preset program
settings, see the following table:
Installation Guide16
DEVIreg™ Opti
Programs
Days
Day
06:00-
08:00
08:00-
16:00
16:00-
22:30
22:30-
06:00
Morning
Evening
Night
Comfort default temperature 21°C 27°C
Economy default temperature 17°C 20°C
P1
Working
day
MON to
SUN
Comfort Comfort Comfort Comfort
Economy Comfort Economy Comfort
Comfort Comfort Comfort Comfort
Economy Economy Economy Economy
P2
Days at
home
MON to
SUN
Room & Floor Floor only
Mon-Fri: P1
Sat - Sun: P2
MON to
FRI
P3
SAT to
SUN
Adjusting timer programming:
When in timer mode, to adjust current program, press and
hold timer button for 2 sec. When timer program name
(i.e. P3) appears, press timer button again, to change the
17Installation Guide
DEVIreg™ Opti
settings of this program. First, hour and minute settings for
all periods (for preset values see table on previous page),
than temperatures for comfort and economy periods can
be adjusted, with help of up and down buttons.
Push timer button , for going to next value/period. When
programming is finished, operating screen will appear.
Period indicator:
P3:
- Comfort
- Economy
P2:
- Comfort
- Economy
Installation Guide18
DEVIreg™ Opti
The shorter line indicates, the current period (comfort or
economy), corresponding to the time setting of the watch.
Note:
The floor and room takes time to heat up. Start comfort
heating period before the time, you need them warm.
Away mode:
Is set by pushing mode button , until
away icon appears. Push the timer
button , for 2 sec., to choose the number
of away days (between 0-99 days), with up
/ down buttons . Start is at "0" days and it can be
increased by pushing the Up arrow button.
Push timer button again to adjust the away temperature,
can be set between 5-20°C, with up or down arrows.
The last set value is used. No confirmation needed. Mode will
end if user is pushing any button (Off button, turns the unit
off). Away icon will disappear from screen.
19Installation Guide
DEVIreg™ Opti
Frost protection:
Is set by pushing until frost protection icon appears.
Desired temperature for frost protection can be set in
installer menu. Value is between 5-9°C.
If the current room temperature is below the set frost protec-
tion temperature, the heating ON icon will appear, and
the thermostat will start heating.
Installer menu:
Settings described in next point (Start up wizard) will be
available, uppon accessing this menu.
It's strongly advised: ONLY for the trained installer, to access
this menu, as changes of settings can lead into damage of a
floor surface.
It can be accessed from OFF state (thermostat is turned off),
by holding the timer button for 10 sec.
The mode button is used for cycling through the
parameters (starting at 1), up & down buttons, for
Installation Guide20
DEVIreg™ Opti
setting the desired value. Push and hold button, for 2 sec.,
to exit this menu at any time, into a manual operation mode.
Start up wizard:
When first time connecting the thermostat to power, or
by accessing installer menu, following parameters can be
adjusted:
No. Parameter settings Settings range Default
P01 Set time (Set Hour) 0 - 24 00:
P02 Set time (Set Minute) 0 - 60 :00
P03 Set weekday Monday to Sunday MON
P04 Temperature control mode
P05 Max. floor temperature
P06 Window open function 0: Disable; 1: Enable; 1
P07 Frost protection funciton 0: Disable; 1: Enable; 1
P08 Set frost protection temp. 5-9° C 5
P09 Set minimum floor temperature 0: Disable; 1: Enable; 0
P10 Minimum floor temperature 18-29° C 23
P11 Startup wizard 0: Disable; 1: Enable; 0
01: Room and floor temp.
02: Only floor temp.
03: Only room temp*
20-35° C
(only for 01 & 02 in P04)
2
33
21Installation Guide
DEVIreg™ Opti
1. Insert
P09 and P10 are only accessible if Room and Floor is chosen
in P04 (temperature control mode).
* Only room temperate, possible only after break-out (see
next page).
** Max. temperature is 0,5°C below value set in P05.
7 Settings & Break out
Room sensor or floor temperature
higher than max. 35°C
A “room only” option is also available,
but requires that you have to break
the small plastic seal on the the back
of the display module, e.g. using a
2. Twist
Installation Guide22
DEVIreg™ Opti
screw driver (insert all the way in and twist). It will be possible to set the maximum floor temperature up to 45°. Furthermore, it will be possible to use only a room sensor. However,
this option is not recommendable due to an increased risk of
overheating the floor.
Note: Please contact the floor supplier before changing the
maximum floor temperature and be aware of the following:
• The floor temperature is measured there, where the
sensor is placed.
• The temperature of the bottom of a wooden floor can
be up to 10˚C higher than the top.
• Floor manufactures often specify the max. temperature on the top surface of the floor.
23Installation Guide
DEVIreg™ Opti
Thermal
resist-
ance
Examples of
flooring
[m2K/ W]
0,05
0,10
0,13
8 mm HDF based
laminate
14 mm beech
parquet
22 mm solid oak
plank
Max. carpet thick-
< 0,17
ness suitable for
floor heating
0,18
22 mm solid fir
planks
8 Disposal Instruction
Details
kg/m
3
setting for
25°C floor
temperature
> 800 28°C
650 – 800 31°C
> 800 32°C
Approximate
acc. to EN
1307
34°C
450 – 650 35°C
Installation Guide24
DEVIreg™ Opti
9 Warranty
YEAR
WARR AN TY
The products will, in the event of a fault that can be tracked
back to a manufacturing defect in the DEVI product, be repaired or replaced free of charge. To apply for this warranty the
installation must be performed by an authorized installer and
the warranty certificate has to be stamped, signed and provided. For more details read our warranty terms and conditions.
25Installation Guide
DEVIreg™ Opti
Installation Guide26
DEVIreg™ Opti
27Installation Guide
DEVIreg™ Opti
Danfoss A/S
Electric Heating Systems
Ulvehavevej 61
7100 Vejle
Denmark
Phone: +45 7488 8500
Fax: +45 7488 8501
E-mail: EH@DEVI.com
www.DEVI.com
Danfoss can accept no responsibility for possible errors in catalogues, brochures and other printed material. Danfoss
reserves the right to alter its products without notice. This also applies to products already on order provided that such
alterations can be made without sub sequential changes being necessary in specifications already agreed. All trademarks in this material are property of the respective companies. Danfoss and the Danfoss logotype are trademarks of
Danfoss A/S. All rights reserved.
Produced by Danfoss © 06/201908096400 & VIJWM102
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