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INSTRUCTION MANUAL
LOR-THERM 355
Cod. 523.0000.100
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For the guarantee to be valid, the
product must be installed and handled
as indicated in this manual. This means
it is extremely important that you read
the manual. This applies both to the
person installing The thermostat and
the person who will use it. You will
also nd technical specications and
information on troubleshooting.
Important The underoor heating system
is an electrical power installation and must
therefore be installed in accordance with the
current regulations and under the supervision
of a qualied electrician.
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This is your thermostat
In the box
Installing the thermostat
Getting started
How the thermostat works
Symbols on the display
How to set the thermostat
Energy saving programs
Troubleshooting
Technical specications
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This is your thermostat
This is a microprocessor-controlled
thermostat with LCD display. The display is backlit and stays lit for 30 seconds after the last push of a button.
The front is tted with an LED and three
control buttons.
There are a number of temperature reduction programs to choose between for
energy-smart heating. There is also the
option of basing the programming entirely on your own heating requirements.
Temperature control is done with help
of an algorithm that uses fuzzy technology. The technology entails the thermostat testing and collecting data from
start-up, and based on this, calculating
when to turn on and o. This technology reduces temperature variations and
thus provides a more constant temperature and lower energy consumption.
The oor temperature varies less than
+/- 0.3 degrees.
Thermostat with fuzzy-technology
Thermostat without fuzzy-technology
TIME
TEMP
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In the box
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1. Front for Elko and Gira
2. Adapter for Strömfors frame system
3. Front for Eljo Trend, Merten
4. Frame
5. Thermostat
6. Floor sensor
7. Connection clip
Manual
Quick guide
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Installing the thermostat
Important The thermostat must not be
located somewhere it is exposed to the
following:
• direct sunlight and draughts.
• extreme uctuations in temperature
or high air humidity.
The oor sensor should be mounted in a
spiral hose laid in the oor. The hose endings should be sealed so that the oor
sensor can easily be replaced. All tubes
leading into the appliance box must be
sealed so that the air temperature sensor
cannot be aected by draughts.
Installation
Mount the thermostat in a 65 mm
standard appliance box.
1. Make sure the box is level with the wall.
2. Take o the front and frame by pressing in the latch on the right-hand side
with a chisel or similar tool, as shown in
the illustration.
3. Connect power, voltage 230 VAC,
load and any oor sensor cable. Extension to the oor sensor cable must be
done with separate cable for power
current. Protective conductor for
incoming feed and for heating cable
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is connected with a connection clip in
the box. See wiring diagram below.
4. Insert the thermostat into the ap-
pliance box and screw tight with the
existing screws.
5. Fit the frame and front.
6. If the thermostat is mounted in a
multi-compartment frame, the internal
corners of this frame must be removed.
LOAD
LOAD
N
L
SENSOR
SENSOR
DO NOT USE
230 V
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Getting started
After installation, wait 2-4 weeks
before starting the underoor heating.
Exactly how long you wait depends
on the type of oor you have and the
instructions for the oor putty. Then
increase the heat gradually.
There is a quick guide so that you can
easily get started with the thermostat.
You will nd it in the box. The guide
describes the most important
functions and settings.
In order to adapt the underoor
heating system to your own heating
requirements as much as possible, it
is important that you read the entire
manual.
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LED
Select button [ ]
Day
Time
Temp
Selected control
How the thermostat works
This section describes all you need to
know about how the thermostat works.
To learn how to enter settings to suit
your own requirements, read the section How to set the thermostat.
Display
Turn on the LCD display’s backlight by
pressing any button. The display stays lit
for 30 secs after the last push of a button.
When the thermostat is started for the
rst time the display shows the factory
settings as in the illustration. How to
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enter personal settings is described in
the section How to set the thermostat.
There is an explanation of the symbols
on the display in the section Symbols.
Using the buttons
The buttons are used to raise and lower
the temperature as well as navigating
the menus.
You access the menus by pressing the
select button [ ]. Use the arrows to
navigate to a menu option and then
conrm with to select it. The menu
system is a scrolling system, in other
words you come to all submenus regardless of the direction you start from.
If you want to exit a menu, navigate
until the display shows END. Then press
the select button . You can also wait
for 30 secs and the menu will end automatically. How to navigate the menus
is described in the section How to set
the thermostat.
Turning the thermostat o and on
To enter standby mode, keep the select
button [ ] depressed for 4 seconds.
Return to normal mode by depressing
for another 4 seconds.
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The heating is not controlled in standby mode. The clock runs as normal and
programmed times and temperatures
remain in the memory.
Locking the keypad
The keypad can be deactivated to
prevent anyone touching the buttons
by mistake. This is shown with the lock
symbol in the display.
Press and navigate to LOCK. Conrm
with to lock.
Unlock by holding down both arrows
until the key symbol has disappeared.
Temperature
Displaying current temperature
(actualvalue)
Lock the keypad rst. Press . The light
will come on and the current temperature in the oor (F) is displayed in small
numbers above the desired temperature. This applies if the control function
is set on Floor thermostat, otherwise
the current temperature in the room (R)
is displayed instead.
The temperature is shown for 30 secs
after the last push of a button.
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Time and date
Time can be shown in 12- or 24-hour
format. The correct day of the week is
worked out automatically. The calendar
resets itself in leap years and adapts to
DST. Read how to set the correct time
and date in the section How to set the
thermostat/Time and date.
Adaptive function
The thermostat has a function which
works out when the heating should
start to give the correct temperature at
the correct time. It is activated on delivery, but can be turned o:
Press and navigate to SET. Select with
. Navigate to AF, select with .
Navigate between ON/OFF, then conrm with .
Ventilation mode
If the room temperature falls by more
than 3°C in a single minute, e.g. when
airing the room, the ventilation mode
is activated. The thermostat will then
stop heating for 15 minutes before returning to normal mode. This function
is always active.
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Delay between turning o and on
There is a built-in delay in order to
avoid unnecessary wear and tear on
internal components and to extend
the life of the thermostat. If you raise
the desired temperature so that the
thermostat comes on, and then lower
it shortly afterwards, it takes 30 sec
before it goes o again.
Operation time
The thermostat can display the operation time as a percentage for the last
24 hours and 7/30/365 days.
Press and navigate to UTIL. Press
to select. The display now shows the
operation time as a percentage for the
last 24 hours. You can then navigate
between the operation time as a percentage for the last 7/30/365 days.
LED
The LED allows you to see the current
status of the thermostat.
Green light – the thermostat is on and
the underoor heating is switched o.
Red light – the thermostat is on and
the underoor heating is activated.
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Flashing green and red light – error
indication. The underoor heating is
turned o. The thermostat shows error
messages until it is switched o. Find
out more under Error codes.
No light – the thermostat is switched
o or is not getting any power.
Control functions
The thermostat can regulate the temperature in three dierent ways. This enables the comfort temperature and any
ooring temperature requirements to be
combined. How you select the function
you want is described in the section How
to set the thermostat/Control functions.
Floor thermostat – A sensor in the oor
measures the temperature and then
regulates the heating accordingly. If
the oor sensor is connected when the
thermostat is turned on for the rst
time, this function is selected automatically. Preset value is 22°C.
Room thermostat – The thermostat has
two built-in sensors for measuring the
room’s temperature and controlling the
heating. The control function cannot
be selected when the oor sensor is
connected.
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Room and oor thermostat – The
built-in sensors regulate the room
temperature and the sensor in the oor
functions as a oor temperature limiter.
The limitation can be set to between
5°C and 45°C. The factory setting of
35°C gives a surface temperature of
approx. 27°C. The cut-out temperature
can be changed, see the section How to
set the thermostat/Temperature.
Important
In rooms with large windows that are
exposed to solar insolation, we recommend
the function Room and oor thermostat.
In rooms with wooden ooring, the function
Room and oor thermostat must always be
used.
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Symbols on the display
1. Day of the week
2. Time and date
3. Selected menu/Current temp
(actual value) °C
4. Set temp (set point) °C
5. Selected control
6. Shows that a program is running
7. Lock symbol
8. Program
9. Event functions for personal settings
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How to set the thermostat
This section describes how to set
your thermostat to suit your requirements. By entering these settings you
can adapt the underoor heating system to your own heating requirements
as much as possible.
If you want to nd out more on how to
navigate the menus or use the keypad,
read the section How the thermostat
works.
Reset
You use the Reset function to make
your thermostat revert to default factory settings. All your personal settings
will be deleted.
Press and navigate to SET. Select with .
Navigate to RST and select with . Navigate between YES/NO, then conrm
with . YES deletes the settings,
NO returns to the menu.
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Light and contrast
Set the light intensity of the LED
Press and navigate to SET. Select with
. Navigate to LED and select with .
Navigate between LED L (weak light)
and LED H (strong light). Conrm with
.
Set display contrast
Press and navigate to CONT. Press
to select. The display shows a number
between 1 and 8 depending on the
current setting. Navigate to regulate
the contrast. Conrm with when you
have achieved the correct level.
Time and date
Set time and date
Press and navigate to SET. Select with
. Navigate to CLK and select with .
First set the hours by navigating to the
correct time and conrm with .
Set the minutes in the same way and
conrm with .
Set the day, month and year in the
same way. Conrm with . The correct
day of the week is set automatically.
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Set time format
Press and navigate to SET. Select with
. Navigate to DISP and select with .
Navigate between 12- and 24-hour
format. Conrm with .
Turn o DST
The calendar switches to DST automatically. This function can be turned o.
Press and navigate to SET. Select with
. Navigate to S and select with .
Navigate between ON/OFF, then conrm with .
Temperature
Change desired temperature (set point)
Each press of the up or down arrow
increases or decreases the temperature
by 0.5°C.
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Control functions
These are described in more detail in
the section How your thermostat works/
Control functions.
Select control function
Press and navigate to SET. Select with
. Navigate to RNF and select with .
The icon for the current function (R, F
or R&F) ashes. Navigate between the
dierent options and conrm with .
Important R cannot be selected if the oor
sensor is connected.
Change cut-out temperature for room
and oor thermostat (R&F)
Press and navigate to SET. Select with
. Navigate to OH and select with .
The set temperature now ashes on
the display. Navigate to the desired
temperature and conrm with .
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Energy saving programs
A smart way to save energy is to
adapt the heating to your actual daily
requirements and, for example, lower
the temperature when the house is
empty. There are four program options
for temperature reduction in your
thermostat: two preset programs for
home and oce environments, one
program which is based entirely on
personal settings, and one frost protection program.
You don’t need to think about the heating time when you are programming
because your thermostat has an adaptive function which takes this into account automatically. Read more about
this in the section How the thermostat
works/Adaptive function.
Start a program
Press and navigate to PROG. Select
with .
The icons , , , are displayed.
The current program icon ashes.
If none of the icons are ashing, no
program has been selected. Navigate
between the icons.
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Select with and the program starts.
When a program is running the icon is
displayed together with .
Stop a program
Press and navigate to PROG. Select
with .
The current program icon ashes.
Navigate until none of the icons are
ashing and conrm with .
Important This does not delete the settings,
just starts/stops the program.
Dierent program options
The two preset programs are suitable
for most home and oce environments.
Program for home environment
The temperature is automatically
reduced by 5°C during the following
periods:
Mon – Fri 08:30 – 15:00
Mon – Sun 23:00 – 05:00
Program for oce environment
The temperature is automatically re-
duced by 5°C at all times except for:
Mon – Fri 6:00 – 18:00
Personal settings
Tailor the heating by programming the
thermostat yourself.
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You can set four events for every day:
wakeup out home and night .
When programming you specify the
desired time and temperature for every
event.
Preset means that the program runs
every day, but you can also programme
each day individually.
Press and navigate to SET. Select with
. Navigate to 4E, select with . Now
you will see
MD TU WE TH FR SA SU
. Press .
Wakeup is shown together with the
current time and temperature.
The time ashes. Navigate until you
reach the time you want the wakeup
event to occur. Set hours rst and
conrm with , then repeat for minutes
and conrm with .
Navigate to the desired temperature
for wakeup. Conrm with .
Out is shown. Repeat the steps
above to set time and temperature.
Home is shown. Repeat the steps
above to set time and temperature.
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Night is shown. Repeat the steps
above to set time and temperature.
If one of the days of the week requires
dierent settings, do as follows:
Press and navigate to SET. Select with
. Navigate to 4E, select with . Now
you will see
MD TU WE TH FR SA SU
. Navigate
to the day with the dierent requirements. Conrm with .
Programme the day’s four events as per
the instructions for personal settings. If
there are additional days with dierent
requirements, repeat the steps set out
above.
Important During the time that the program
is active it is still possible to change the de-
sired temperature (set point). When the next
programmed event starts, the thermostat reverts to the programmed temperature.
Frost protection program
This program is ideal for when you
want to protect against frost damage
in premises which are standing empty
or unused for long periods, such as holiday homes and warehouses, or when
you will be away from your main home
for longer than usual. You set a desired
value (set point) and the thermostat
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regulates the temperature in line with
this. The normal settings remain in the
memory and the thermostat reverts
to them when the frost protection
program is deactivated.
Temperature can be set to a level between 5°C and 15°C, the factory setting
is 10°C.
Press and navigate to SET. Select with
. Navigate to FP, select with .
The set temperature will ash; navigate
to the desired temperature and conrm with .
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Troubleshooting
Important The underoor heating
system is an electrical power installation and any faults must therefore be
remedied by a qualied electrician.
Error codes
When an error occurs, the thermostat
will turn o the heating. The LED ashes
alternately in red and green. The LCD
display shows a ashing error code, while
the display shows the following texts:
Error 1: Short circuit room sensor.
Error 2:Interruption room sensor.
Error 3: Short circuit floor sensor.
Error 4: Interruption floor sensor.
Test values for oor sensor
The following values apply when
the oor sensor’s measurements are
checked.
Temperature Resistance
10oC 18,0 kΩ
15oC 14,7 kΩ
20oC 12,1 kΩ
25oC 10,0 kΩ
30oC 8,3 kΩ
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Technical specications
Voltage 230 VAC-50 Hz
Air temp. range 5-37°C
Floor temp. range 5-37°C
Temp. limiter 5-45°C
Breaking capacity 3600 W/16 A/230 VAC
Main switch single-pole
Connection cable max 2.5 mm
2
Load cosφ= 1
Hysteresis +- 0.3°C
Protection class IP21
Back up time 36 h
Max. length sensor
cable
50 m, 2x1.5 mm
2
Approval:
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Article
Dimensions
(mm)
Extension frame
81x81x29
Sensor cable 3 m (included)
Back plate,
polar white
86x86x6
Accessories
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