Nefit iRT 30 User manual

English
iRT 30
Programmable roomthermostat
Instruction manual

English
B
bcd
fgh
1)ij
1! 1@ 1#
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A

English
btemperature adjustment knob • Temperaturwahlschalter • bouton de réglage de la température •
manopola di regolazione della temperatura • Temperatur indstillingsknap
ctemporarily reduce the program-temperature • Programmtemperatur vorübergehend erniedrigen •
abaisser temporairement la température du programme • riduzione temporanea della temperatura
programmata • Midlertidig sænkning af programtemperatur
dtemporarily raise the program-temperature • Programmtemperatur vorübergehend erhöhen •
augmenter temporairement la température du programme • aumento temporaneo della temperatura
programmata • Midlertidig forøgelse af programtemperatur
eadjustable program knob • Programmwahlschalter • bouton de réglage du programme •
tasto di programmazione • Programdrejeknap
fday • Tag • jour • giorno • Dag
gtime • Zeit • Heure • ora • Tid
htemperature • Temperatur • température • temperatura • Temperatur
ivacation • Urlaub • vacances • vacanze • Ferie
jinsert • Einfügen • insérer • inserire • Indføring
1) remove • Löschen • effacer • Slet
1! heating • Heizung • chauffage • riscaldamento • Opvarmning
1@ hot water • Brauchwasser • eau chaude • acqua calda • Varmt vand
1# menu • Menü • menu • menu • Menu

English
Technical specifications
EV-number 18127
EV-number optional outside sensor 18140
Power supply 2-core polarity-free
low voltage connection
with UBA-4000
Maximum wire thickness 1.5 mm2
Permissible ambient temperature:
- in operation 0 °C - 50 °C
- during storage - 20 °C - 60 °C
Permissible relative humidity 0 - 90 %, non-condensing
Electrical protection level IP 00
Dimensions (W x H x D) 175 x 90 x 35 mm
Clock program:
- total day programs 7
- total switching points per week 70
- adjustable by 10 minutes
- option for clock switching
hot water provision
Temperature regulation:
- adjustment principle modulates on the basis of:
- room temperature
- outside temperature
- combination of both
- adjustment range 10 °C - 30 °C
- smallest adjustable value 0.5 °C
- setting via clock program digital
- setting via manual control analogue

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Contents
Contents
1. Preface 2
2. Safety regulations 2
3. Brief description of the IRT 30 3
3.1 Introduction 3
3.2 Selecting the correct kind of temperature regulation 4
3.3 Operating controls 8
3.4 Information on the display 8
4. Operation 10
4.1 General 10
4.2 Setting the temperature 11
4.3 Setting the clock1 12
4.4 Clock programs 12
4.5 Your own clock program 14
4.6 Special functions 18
5. Installation of the IRT 30 22
5.1 Mounting 22
5.2 Testing the thermostat 25
5.3 Setting the thermostat 25
6. Setting the temperature control 26
6.1 Selecting a temperature control 26
6.2 CH menu 28
7. Setting the hot water supply 31
7.1 Checking and/or changing the settings 31
7.2 Hot water menu 32
8. Configuration and calibration of the IRT 30 thermostat 33
8.1 Adapting the configuration 33
8.2 Calibration 35
9. Malfunctions and the display codes of the boiler 38
9.1 Malfunctions 38
9.2 Display codes of the boiler 41
10. Glossary 43
11. Index 45
Technical specifications
Settings of the IRT 30

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Preface and Safety regulations
1. Preface
This manual is split up into two parts:
- Manual for the user (chapters 1 up to and including 4)
- Manual for the installer
This manual contains a glossary (chapter 10).The glossary gives a
description of the words which are not used in common
parlance. Also, an index is included.This enables you to easily find
a specific subject in the manual.
After reading the User Manual, you are able to use the IRT 30
clock thermostat.You can enter the desired program, so that you
have the desired temperature at every moment of the day.This
manual gives an answer to the following question:
“What do you have to know to control the IRT 30”.
The more technical issues can be found in the manual for the
installer. In this section you can also find the mounting and
installation instructions.The installer should also set the IRT 30.
In the event of malfunctions, you can find information about this
in chapter 9.You can also contact your installer.
2. Safety regulations
- Never disassemble the thermostat, and do not drop it on the
floor; the thermostat contains vulnerable electronic parts and
sensitive sensors.
- Avoid high temperatures, moist and dusty surroundings.
- Do not use liquids or cleaning agents to clean the thermostat.
- Switch off the power supply of the CH before you install the
thermostat. Make sure the power supply of the CH is actually
switched off.

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Brief description of the IRT 30
3. Brief description of the IRT 30
3.1 Introduction
The IRT 30 clock thermostat has been specially developed for the
use with boilers fitted with the universal burner auto unit UBA-
4000.The IRT 30 is designed for wall-mounting and is powered
via a connection to the boiler.Thus, the thermostat does not use
any batteries. By making use of a computer program, the
thermostat continuously receives data from the boiler and the
other way around.With this information, the thermostat is able
to give instructions to:
- comfortably heat your home,
- supply the boiler with hot water at the right time,
- save as much energy as possible.
You can program the IRT 30 with a maximum of 70 switching
points for one week. Furthermore, you can change the switching
points, and remove or insert them.
Switching point
A switching point is a setting in your clock thermostat. It is a moment
in time at which you desire a different temperature.To set this, you
have to enter the desired time and the desired temperature.
(In paragraph 4.4 this will be explained in detail).
In doing so, you can refine the temperature regulation of your
home.
The IRT 30 is suitable for three kinds of temperature regulation:
- room temperature controlled regulation
- weather dependent regulation
- weather dependent regulation with room temperature
compensation.
The kind of temperature control which is applicable to you, is the
starting point for setting the IRT 30.Therefore, the following
paragraphs will describe the three kinds of temperature
regulations.

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Brief description of the IRT 30
3.2 Selecting the correct kind of temperature
regulation
In paragraph 3.1 the three kinds of temperature regulation for
which the IRT 30 is suitable, are mentioned:
- room temperature controlled regulation
- weather dependent regulation
- weather dependent regulation with room temperature
compensation.
For the last two mentioned, it is necessary to place an outside
temperature sensor (which determines the outside temperature
and sends this information to the boiler) on the outside wall of
your house.This must be a wall where the sun does not shine on
directly and where the outside air can freely circulate around the
sensor.
Room temperature controlled regulation
This is the simplest principle of regulation. It gives a high comfort
level and has a high performance.To ensure the installation will
operate according these principles, a number of conditions
should be satisfied.There should be a room in your house in
which the temperature is representative for the temperature in
the rest of your house.This must be a room where, for example,
the fireplace does not burn all day long, or the outside door or
windows are not open very often. Such a room is called a
reference room.
Reference room
A reference room is a room (for example the living room) where
a temperature can be measured which is representative for the
entire house.
We assume that the temperature in other rooms (for example
kitchen or bathroom) is equal to the temperature in the reference
room.
An other reason to appoint a specific room as reference room is that
most of the time will be spent in this room.Therefore, it is important
that the temperature regulation of this room is correct.The other
rooms in the house can have a lower (or higher) temperature.

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Brief description of the IRT 30
What does room temperature controlled regulation mean?
- The IRT 30 continuously measures the temperature in the
room where it is fitted.
- The measured temperature will be compared with the desired
(set) temperature.
- The IRT 30 determines how intensely the boiler has to burn to
heat the CH-water, in order to achieve and maintain the
desired temperature.
- The IRT 30 calculates the lowest possible water temperature,
so that the boiler has to burn no more than necessary.
- In general, the boiler will therefore burn for a longer period at
a lower capacity.
- By means of this principle of control, hot CH-water is available
nearly all the time. If, in another room, a closed radiator valve is
opened, the room will quickly be brought up to temperature as
a result.
When to apply the room temperature controlled regulation?
- When the house is heated only by means of radiators.
When not to apply the room temperature controlled regulation?
- When there is no appropriate reference room in the house to
install the IRT 30.
- When your house is heated (also) by means of floor heating,
air heating or convectors.
In practice, the room temperature controlled regulation is the
principle which will be selected in most cases.
Weather dependent regulation
This is a principle of regulation in which the determination of the
CH water temperature is achieved by the outside temperature
and a number of preset values in the IRT 30.This can be necessary
when no reference room is available. Furthermore, this principle
is used in buildings where it must be possible to heat the rooms
independently from each other (for example old people’s homes
or office blocks). For this principle, the separate rooms should be
equipped with radiators with thermostatic radiator valves, in
order to regulate the temperature in each room.

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Brief description of the IRT 30
In a house which is heated by floor heating, the temperature
fluctuations should not become too large. Furthermore, this kind
of heating heats up and cools down very slowly. In this situation,
weather dependent regulation is a good choice, because with this
regulation the heating intensity of the boiler will only be affected
by the outside temperature. Because of this, changes will take
place relatively gradually.
What does the weather dependent regulation mean?
- The heating intensity of the boiler is determined by the outside
temperature and specific preset values on the IRT 30 clock
thermostat.
- When the outside temperature drops, the boiler will burn
more intensely and heat the CH water to a higher temperature
(up to a preset maximum temperature).
- When the outside temperature rises, the boiler will burn less
intensely and heat the CH water to a lower temperature
(up to a preset minimum temperature).
- The rooms will be heated by the continuously circulating
CH water.
- The temperature in the rooms to be heated can be regulated
by means of thermostatic radiator valves.
When to apply weather dependent regulation?
- When your house does not have a suitable reference room.
- When you want to precisely regulate the temperature in more
than one room.
When not to apply weather dependent regulation?
- When your house does not comply with the above mentioned
criteria.This is a relatively less economical regulation principle,
so you should apply this kind of regulation only if strictly
necessary.
Weather dependent regulation with room temperature
compensation
This kind of regulation is a derivative of the weather dependent
regulation.With this principle, the CH water temperature is
determined, in first instance, by the outside temperature and the
preset values on the IRT 30. However, the thermostat also
measures the temperature in the room where it is fitted.

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Brief description of the IRT 30
This information is used to make minor corrections to the signal
to the boiler, so that the desired temperature can be reached.
The temperature in the room where the thermostat is fitted, is
determined by the thermostat itself.The temperature in all other
rooms can be regulated by means of the thermostatic radiator
valves. Basically, you can choose this kind of regulation in the
same cases as you would choose the weather dependent
regulation without room temperature compensation.A suitable
reference room should be available in the house.
What does weather dependent regulation with room temperature
compensation mean?
-
The CH water temperature will be determined, in first instance,
by the outside temperature and the preset values in the IRT 30.
- The IRT 30 also measures the temperature in the room where
it is fitted.
- On the basis of the measured room temperature, the IRT 30
adapts the water temperature of the CH automatically.
- The rooms will be heated by the continuously circulating water.
- The temperature in the room where the thermostat is fitted
will be determined by the thermostat itself.
- The temperature in all other rooms which must be heated can
be regulated with the thermostatic radiator valves.
When to apply weather dependent regulation with room temperature
compensation?
- When you want to precisely regulate the temperature in more
than one room and there is a reference room available.
When not to apply weather dependent regulation with room
temperature compensation?
- When your house does not comply with the above mentioned
criteria.This is a relatively less economical regulation principle,
so you should apply this kind of regulation only if strictly
necessary.

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Brief description of the IRT 30
3.3 Operating controls
The IRT 30 can be controlled on two levels (refer to the fold-out
page, figure A and B):
1. With the flap closed (figure A); you now have access to:
- The temperature adjustment knob, for manual adjustment
of the temperature,
- the + and – push buttons, for temporary adjustment of the
temperature within the clock program.
2. With the flap open (figure B); you now have access to
10 operating controls:
- One adjustable program knob, by means of which you can
scroll through a program and raise or lower the values,
- Nine push buttons for several functions like time setting,
day setting, program setting etc.
The principle of this operation is ‘push and turn’:
-
Select the key of the function you want to change and hold it.
- Simultaneously turn the program knob clockwise to raise
the value, or:
- Simultaneously turn the program knob counter-clockwise
to lower the value.
In chapter 4, operation will be explained in detail.
3.4 Information on the display
The screen (also referred to as display) shows information about
the operation of the boiler and the thermostat by means of digits
and symbols.The display in figure 3-1 shows all possible symbols.
Beside this, the meaning of each symbol is described.
figure 3-1
–
+

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Brief description of the IRT 30
boiler does not heat the CH water (hot water supply OFF)
clock program is shown
boiler heats the CH water (hot water supply ON)
Boiler heats CH water according to clock program
(hot water supply AUTO)
CH boiler ON
room temperature controlled regulation is active
weather dependent regulation is active
weather dependent regulation with room temperature
compensation is active
CH boiler OFF
automatic summer/winter mode (only when outside temperature
sensor is connected)
each block 0.5 °C lower/higher
night setting (ECO-mode)
vacation setting
boiler display code, may indicate malfunction
day number (Monday = 1,Tuesday = 2 ... Sunday = 7)
time indication
temperature indication

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Operation
During programming, the display shows information about the
switching points of the program.
In rest (normal mode), the following is shown on the display:
figure 3-2 Display in rest
4. Operation
4.1 General
Read this manual carefully, so you can operate the IRT 30
correctly.Your installer can inform you in detail about the use of
the clock thermostat.
Efficient heating and ventilation
- Avoid extreme temperature settings and quick changes of
temperature in the program (difference between day and night
temperature may not exceed 5 °C).
- Do not let the temperature of the rooms drop too low during
night setting. (Your CH must burn longer and more intensely to
heat up walls which are cooled down).
- Make sure your house has a good atmospheric humidity,
especially during the cold months.You can achieve this by
placing indoor plants or humidifiers.A good atmospheric
humidity contributes to a pleasant climate in your house.
- Ventilate well (briefly more ventilation takes less energy than
ventilating a little for a long period).
Clock
- Set the clock of the IRT 30 to the correct time (if necessary),
to ensure correct functioning of the clock thermostat (refer to
paragraph 4.3: Setting the clock).

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Operation
Power supply
- The IRT 30 does not use batteries but uses electric power.
- The necessary electric power is supplied via a connection on
the boiler.
- During power failure or when switching off the power supply,
the clock will continue for at least one hour.
- Your clock program will always be maintained.
Maintenance
- Clean the IRT 30 using a dry cloth.
- Do not use any liquid or cleaning agents.This may cause
short-circuiting or damage to the thermostat.
Outside temperature
- If you select the weather dependent regulation (with or
without room temperature compensation), you need an outside
temperature sensor, which is connected to the boiler.
- Without the outside temperature sensor, only the room
temperature controlled regulation can be used.
4.2 Setting the temperature
You can set the temperature in two ways:
1. manually:
- Turn the temperature adjustment knob to the desired
temperature (refer to figure 4-1)
The clock program will be switched off.
2. automatically:
- Turn the temperature adjustment knob counter-clockwise un
-
til the dash points downwards (Auto mode, refer to figure 4-3)
- Raise the temperature by pressing the + key, 0.5 °C per
step, refer to figure 4-3).
- Lower the temperature by pressing the - key.
The clock program will not be switched off, but adjusted
temporarily to your desire. At the next switching point, the
clock program will be activated again.
The display usually shows the measured temperature in the
room and therefore not the set temperature.You can see the
set temperature by pressing the + or – key briefly.The set
temperature will blink for 5 seconds. After that, the measured
room temperature is shown.
manually
figure 4-1
automatically
figure 4-2
figure 4-3

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If the thermostat is set to weather dependent regulation and you
turn the temperature adjustment knob out of the AUTO-mode,
the thermostat will function as for weather dependent regulation
with room temperature compensation. On the screen, the symbol
of weather dependent regulation will be replaced by the symbol
for weather dependent regulation with room temperature
compensation (also refer to page 9).
4.3 Setting the clock
For a correct functioning of the clock program, it is important
that the set time is equal to the actual time. Setting the clock is
only possible when the display is in normal mode.
1. Make sure the display is in normal mode (refer to figure 3-2).
Wait 7 seconds until the display returns to the normal mode,
if the display is not in normal mode, for example because you
are programming.
2. Set the correct day:
• Press and hold the DAY key
• Change the day number using the program knob
(Monday = 1,Tuesday = 2 etc.).
• Release the DAY key.
3. Set the correct time:
• Press and hold the TIME key.
• Change the time using the program knob.
• Release the TIME key.
4.4 Clock programs
With the clock programs the IRT 30 can regulate the
temperature automatically throughout the week.The clock
program uses switching points.The program will switch over to
your temperature settings on these points in time.
Operation
–
+
+
1..7
–
+
+

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Switching point
A switching point is a setting in your clock thermostat. It is a point in
time at which you desire another temperature.To set the switching
point, you have to enter the desired time and the desired temperature.
You can check the switching points by slowly turning the program
knob.You will see the day number, time and temperature for each
switching point. Looking to the clock program, you can see a
clock in the left upper corner of the display.As soon as you change
a setting in the clock program, the clock symbol starts blinking.
The IRT 30 is supplied with a standard clock program.
This program looks like this:
This program is activated, when the temperature adjust knob is in
AUTO (refer to figure 4.2).
ECO means the setting of the night temperature (standard set to
16 °C)
1
ECO
7.00 9.00 00 11. 00 13. 15.00 17.00 19.00 21.00 23.00
= Switching point
= Mo to Fri
= Sa + Sun
2
3
4
–3
–2
–4
–1
0
15˚C
ECO
7.00 9.00 00 11. 00 13. 15.00 17.00 19.00 21.00 23.00
= switching point
= Mo to Fri
= Sat + Sun
20˚C
25˚C
30˚C
Operation
For weather dependent regulation
Monday to Friday
(day numbers 1 t/m 5)
07:00 u + 1.0
09:00 u - 1.0
17:00 u + 1.0
23:00 u - 4.0
Saturday and Sunday
(dagnummers 6 en 7)
08:00 u + 1.0
23:00 u - 4.0
For room temperature controlled
regulation and weather dependent
regulation with room temperature
compensation
Monday to Friday
(day number 1 t/m 5)
07:00 u 21 °C
09:00 u 19 °C
17:00 u 21 °C
23:00 u ECO
Saturday and Sunday
(day number 6 en 7)
08:00 u 21 °C
23:00 u ECO

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Operation
In the standard clock program for the weather dependent
regulation you do not find temperatures, but scale points. One
point of the scale corresponds with a temperature range of
0.5 °C to 2 °C.The calculation starts at 0, which corresponds
with a standard room temperature (20 °C).
Consequently:
– 1 means 18 - 19.5°C and
+ 1 means 20.5 - 22°C.
1 point does not correspond with 1 °C.
Where setting or changing of the temperature is mentioned
in the text, you must change the scale points for the
weather dependent regulation.This is possible with
steps of 0.5 points.
4.5 Your own clock program
Instead of using the standard clock program, it is also possible to
create your own clock program. In doing so, you can create a
clock program appropriate for your daily schedule. For each
switching point you can adapt the time and the temperature.
Furthermore, you can insert or remove switching points.
Changing a switching point
1. Make sure the display is in normal mode (refer to figure 3-2)
2. Select the switching point you want to change, using the
program knob.
3. Change the time as follows:
- Press and hold the TIME key.
- Change the time using the program knob.
- Release the TIME key.
–
+
–
+
+

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Operation
4. Change the temperature as follows:
- Press and hold the TEMPERATURE key.
- Change the time using the program knob.
- Release the TEMPERATURE key.
You have now changed a switching point. After a few seconds, the
display shows the actual time and the measured room
temperature (normal mode).
Inserting an arbitrary switching point
If you want to have more switching points in your clock program,
do the following:
1. Make sure the display is in normal mode (refer to figure 3-2).
2. Select a switching point using the program knob.
3. Briefly press the INSERT key.
4. Press and hold the DAY key and select a day using the
program knob.
5. Release the DAY key.
6. Press and hold the TIME key and select a time using the
program knob.
7. Release the TIME key.
–
+
+
–
+
–
+
+
1..7
–
+
+

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Operation
8. Press and hold the TEMPERATURE key and select a time using
the program knob.
9. Release the TEMPERATURE key.
You have inserted a switching point.
Inserting a switching point at the current time
You can also insert a switching point at the current time:
1. Make sure the display is in normal mode (refer to figure 3-2).
2. Press and hold the INSERT key and change the temperature
using the program knob.The temperature indication is
blinking.
3. Release the INSERT key when the desired temperature is set.
The switching time is set to the current time, rounded off at
10 minutes.
Removing a switching point
1. Make sure the display is in normal mode (refer to figure 3-2).
2. Select the switching point you want to remove with the
program knob.
3. Press and hold the REMOVE key. All digits change into an 8
and disappear from the right to the left.
4. Wait until all digits are removed.
5. Release the REMOVE key.
When you release the REMOVE key before all digits have been
removed, the switching point has not been removed.
–
+
+
–
+
+
–
+