REMEHA iSense Manual

Remeha iSense
Installation and Service manual

2
Remeha iSense
Contents
1. Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
2. Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.1 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
2.2 Buttons . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
3. Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3.1 Location of the thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3.2 Installation and connection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6
3.3 Location of the outside sensor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .8
4. Prior to first use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.1 Setting language, time and date. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
4.2 Default setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
5. Setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
5.1 Creating or changing a clock program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
5.2 Setting continuous temperatures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
5.3 Holiday program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .11
6. Using the iSense . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
6.1 Selecting a program . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
6.2 Temporarily changing the temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
6.3 Fireplace mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .13
6.4 Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .14
7. Changing usage settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
7.1 Setting the display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
7.2 Setting button locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
7.3 Setting the language. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
7.4 Setting the usage mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
7.5 Resetting the factory settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15
7.6 Calibration. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
7.7 Restore connection to iBase (iSense RF only). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
7.8 Setting the date and time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
8. Comfort correction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .17
9. Hot water settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
9.1 Preventing legionella . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
9.2 Controlling the tap water temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .18
10. Central heating settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .20
11. Selecting the control strategy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
11.1 Five control strategies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21
11.2 Setting the control strategy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
11.3 Specific settings for weather-compensated control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .22
11.4 Heating curve – an example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .23
12. Frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
12.1 "System" frost protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24
12.2 "Room" frost protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .24

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13. Digital input . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
13.1 Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
13.2 Examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .25
14. Installer settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
14.1 Telephone number for service message. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
14.2 Service messages on or off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
14.3 Pin code for menus for the installer and system. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
15. Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
15.1 Fault messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
15.2 Service message . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .29
16. Problems and solutions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
17. Menu structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .32
18. Technical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .33

4
Remeha iSense
1. Introduction
The Remeha iSense is a timer thermostat with many enhanced
functions.
The iSense is supplied in OpenTherm and RF variants:
• iSense OpenTherm
• iSense RF (wireless), with the iBase RF transmitter
This installation and service manual describes all the functions
of the iSense. (OpenTherm and RF)

5
2. Overview
The iSense is menu-controlled, which means it is very simple to
operate: it only has three buttons.
T001034-06-A
Mode button B
Mode button A
Temperature TimePictograms
Menu Program
Textbox
menus 2.1 Display
Pictograms
Clock program active
Clock program A active
Clock program B active
Continuous day temperature
Continuous night temperature
Frost protection
Summer mode
Manual setting
Holiday program
DHW standby function switched off
Room temperature set
Current room temperature
Current outside temperature
Central heating boiler is on
Pictograms not shown
Controller requesting heat
Central heating boiler on for hot water
Central heating boiler on for central heating
Button locking enabled
Warning symbols
Water pressure in central heating system too low
Central heating boiler requires servicing
Battery in controller almost empty
General warning symbol
No wireless connection
2.2 Buttons
The function of button A and button B depends on the task you
are carrying out. The function is shown in the display,
immediately above the buttons.
iButton C is a push-turn button. You press it to confirm
choices, such as menu selections.
By turning it you can perform various tasks such as scrolling
through menus or changing values such as the temperature,
time, date and language.
A
T000059-06-B
BC

6
Remeha iSense
3. Installation
T001046-C
3.1Location of the thermostat
iSense OpenTherm and iSense RF
The iSense is set to room control by default, which means
that the inside temperature is used to control the central
heating. That is why it is best to locate the iSense on an
internal wall in the room in which you spend the most time,
such as the living room.
Do not locate the controller too close to heat sources (fireplace,
radiator, lamp, candles, direct sunlight etc.), or in places where
it may be draughty.
For iSense RF only
The following also apply for the iSense RF:
• Position the iSense at least 1 metre from equipment with
electromagnetic emissions such as Washing machines,
Tumble driers, wireless telephones, TVs, computers, micro-
wave ovens, etc.
• Position the iSense so that it has good reception. Take
account of the fact that objects containing metal will affect
the reception. These include steel-reinforced concrete, mir-
rors and windows with a metal coating, insulating films etc.
iSense RF wireless range
The range of the iSense RF in buildings is generally 30 metres
Note!
This value is purely an indication. The actual range of the RF
signal depends strongly on the local environment. Remember
that the number of walls and ceilings (metal or otherwise) can
have a (considerable) impact on reception. Other objects that
contain metal may also impact reception. These include mirrors
and windows with a metal coating, insulating films etc.
iThe signal strength can be viewed via Menu > Information.
3.2Installation and connection
The following must be done before you install and connect the
iSense:
• Adjust the boiler so that it can be connected to an
OpenTherm thermostat. Consult the boiler documentation
for this process.
• Turn off the boiler.
Now proceed as follows:
1. Open the housing by pulling the front and the base plate
apart.

7
2. Attach the base plate of the controller to the wall using
the screws and plugs supplied. Ensure that the boiler's
connecting wires are protruding through the hole in the
base plate.
3. Connect the thermostat to the boiler OpenTherm
connection and the controller OT connection.
OpenTherm is polarity insensitive. The wires may therefore
be swapped.
4. Place three AA batteries in the thermostat if required.
These are not provided. The batteries ensure that the clock
keeps running when the boiler is switched off. The batteries
also power the backlight for the iSense for boilers that do
not have OpenTherm Smart Power. If you have a boiler
with Smart Power, then the backlight for the iSense also
works without batteries.
(iSense RF only) Place 3 AA batteries in the thermostat.
These are required to operate the iSense RF.
iThe programs that are set are not lost when the boiler or
the iSense is switched off (even if there are no batteries).
The iSense is now connected and ready for use. The
iSense RF automatically starts communicating with the
iBase.
T001035-06-B
3
2x
2
2x
4
2x
1
OT
T001036-06-C
OTDigi
T001042-B

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Remeha iSense
3.3 Location of the outside sensor
An outside temperature sensor is not supplied as standard with
the iSense. You only require this sensor if you want weather-
compensated control of the inside temperature.
The following guidelines apply with regard to choosing
a location for an outside temperature sensor:
• Install the outside sensor on the north or north-west side of
the home, away from direct sunlight.
• The sensor must be positioned at least 2.5 metres above
ground level.
• Do not install the outside sensor near windows, doors,
ventilation grills, extractors, etc.
Consult the documentation for your boiler for information on
connecting an outside temperature sensor.
T001043-06-B
>2.5m

9
4. Prior to first use
4.1 Setting language, time and date
The menu for selecting the language (international version) or
setting the time (Dutch version) appears when you connect the
iSense.
1. Select the desired language if applicable by turning button
C and then push button C to confirm.
2. Follow the instructions on the display to select the time,
year, month and day.
The controller is now ready for use. After installation, the
default clock program is activated (see paragraph 4.2).
The temperature is now controlled by this clock program.
iThe thermostat automatically switches between summer
time and winter time settings.
4.2 Default setting
Room control
The iSense is set to room control by default (central heating
is controlled on the basis of the inside temperature). Weather-
compensated control of the boiler (on the basis of the outside
temperature) is also possible (with outside sensor).
Clock program
The default clock program sets the temperature each day as
follows:
• 06:00 – 19:00: 20°C (7 days)
• 19:00 – 23:00: 21°C (7 days)
• 23:00 – 06:00: 15°C + (7 days)
You can of course adapt the clock programs to your own
requirements. See Chapter 5.

10
Remeha iSense
5. Setting
5.1 Creating or changing a clock program
A clock program automatically controls the temperature for a
day, and can be set for each individual day. You can adjust the
default clock program or enter a completely new program.
i
The iSense starts pre-heating prior to the set time
by default, so that the room has reached the desired
temperature at the correct time. Instructions on how to
change this pre-heating setting can be found in Chapter 10.
iSetting the clock program indirectly determines when DHW
standby is active (see paragraph 9.2).
Making an overview
It is useful to draw up your own overview with switch times:
what temperature is needed and at what time?
This will of course depend on your presence at home, your
wake-up times, and so on. You can set up to six switch times
per day. See the adjacent table.
Time MO. TU. WE. TH. FR. SA. SU.
7:00
9:00
11:00
13:00
15:00
17:00
19:00
21:00
23:00
0:00
T001003-06-A
Creating a new clock program
1. Select Menu > Program > Clock program > New time.
2. Select an initial program if appropriate (Daytime home,
Midweek home or Weekend home). You can now create
your own clock program based on this program. Press
button C to confirm.
3. Go to the day for which you want to set the clock program.
Press button C to confirm.
4. Go to the switch time you want to set.
Press button C to confirm.
iYou can use the Remove button to remove the selected
switch time.
5. Use button C to set the time and the corresponding desired
temperature.
6. Once you have set all switch times for a particular day, you
can copy the settings for that day to other days:
- Go to the day.
- Press Copy.
- Select the day(s) to which you want to copy the settings
using button C and press Save.
7. Go to the day. Then press button C.
8. Go to step 3 to set the next day, or press Back to close this
menu.
Changing an existing clock program
1. Select Menu > Program > Clock program > Change.
2. Go to the day for which you want to change the clock
program. Press button C to confirm.
3. Go to the time you want to change.
Press button C to confirm.

11
iYou can use the Remove button to remove the selected
switch time.
4. Use button C to set the time and the corresponding desired
temperature.
5. Once you have set all switch times for a particular day, you
can copy the settings for that day to other days:
- Go to the day.
- Press Copy.
- Select the day(s) to which you want to copy the settings
using button C and press Save.
6. Go to the day. Then press button C.
7. Go to step 2 to set the next day, or press Back to close this
menu.
Restoring the default settings
Select Menu > Program > Clock program > Factory settings
to restore the settings for the default clock program.
5.2 Setting continuous temperatures
Instead of the clock program, you can also set the room
temperature continuously to a particular value. You can set
three different continuous temperatures via Menu > Program:
• Day temp.: room temperature during the day,
corresponding to the "Continuous day" program.
• Night temp.: room temperature at night, corresponding to
the "Continuous night" program.
iThe Night temp. setting is also used in combination with
the Day temperature limit, Night temperature limit (see
paragraph 11.3) and DHW standby function (see paragraph
9.2).
Frost temp.: room temperature to protect the room where the
controller is installed from freezing. This setting comes under
the "Frost protected" program.
The programs mentioned are explained in more detail in
paragraph 6.1.
iIf the set room temperature falls below the value set for
Night temp., the DHW standby function is switched off by
default. See paragraph 9.2
5.3 Setting a holiday program
It can be useful to set a holiday program if you are away from
home for some time. This ensures a constant temperature
in your home for the period you set. You set the temperature
yourself.
A holiday program automatically takes effect at 0.00 hours on
the start date and ends at 0.00 on the end date.
The symbol appears in the display. This program is
switched off and removed once the period set has ended.

12
Remeha iSense
You can set a maximum of 16 holiday programs.
You do this via Menu > Program > Holiday prog.:
• Select View to look at the holiday programs set.
• Select Change to change or remove programs.
• Select Enter to add a new program.
• Select Desired temp. to set the constant temperature.

13
6. Using the iSense
6.1 Selecting program
You can select one of the following programs via Program in
the main display:
• Clock program: the central heating temperature is
controlled by the program you have set.
• Continuous day: the temperature remains constant at the
day temperature you have set.
• Continuous night: the temperature remains constant at
the night temperature you have set.
i
For details of the DHW standby function, see paragraph 9.2.
• Frost protection: the temperature remains constant at the
frost protection temperature you have set. DHW standby is
switched off for this program.
• Continuous summer: the temperature remains constant at
the night temperature, whereby the tap water is on standby
between 6.00 and 23.00 (which means that you will get hot
water more quickly).
6.2 Temporarily changing the temperature
You can (temporarily) switch off a selected clock program or
continuous program at any time by setting the temperature
manually.
1. Turn button C from the main display to set a new
temperature.
2. Press Adjust time if you also want to set an end time for
the manually-selected temperature, and select this time
using push-turn button C.
i
If you do not select an end time and a clock program was
active, that clock program will become active again at the
next switch point. Manual operation will then be switched off.
3. Press Adjust date if you also want to set an end date for
the manually selected temperature and select this date
using push-turn button C.
4. Press button C to return to the main menu or wait five
seconds until the thermostat automatically returns to the
main menu.
Press the Next program button to cancel the manual
temperature change.
6.3 Fireplace mode
Once the temperature has reached the desired level in the
room where the iSense has been positioned, the central heating
switches off. This may be inconvenient if, for example, you have
an open fire or if a lot of people are present in that room. Other
rooms in the house are also no longer heated in this situation.
You can switch on the fireplace mode via the Program button
so that the other rooms are still heated.

14
Remeha iSense
This switches off the built-in room sensor in the iSense. The
temperature of the central heating water at that point is then
maintained.
If it becomes too cold or too hot in the other rooms, you can
increase or decrease the room temperature there using push-
turn button C on the iSense. This increases or decreases
the central heating water temperature. You can fit thermostat
valves to the radiators in order to individually control the
temperatures in these rooms.
iThe fireplace mode should only be activated if the iSense
uses the room temperature to control the temperature.
iWe advise that you close the radiator valves in the room in
which the iSense has been positioned to prevent the room
temperature there becoming too high.
iThe controller switches to weather-compensated control if
the outside temperature sensor is used.
6.4 Information
You can request operating information about your central
heating system, such as the water pressure in the central
heating system and various temperatures, via Menu >
Information.
The information available depends on your central heating unit.
The "Basic" and "Normal" modes do not show all information
categories which are available. Select More information to
make all information available.

15
7. Changing usage settings
7.1 Setting the display
Using Menu > Settings > Users > Display, set the following:
Small information lineLarge information line
T001037-06-C
• Info line small: select what information should be
displayed on the small information line.
•
Info line large: select what information should be displayed
on the large information line.
• Light time-out: set how many seconds the backlight must
remain on after the last button is touched.
7.2 Setting button locking
Button locking ensures that the buttons are locked if the iSense
has not been used for 30 seconds.
You can set this option using Menu > Settings > Users > Key
lock, applying a pin code if desired:
• Off: button locking is switched off.
• On: button locking is switched on and is disabled by
pressing button C twice.
• On + pin code: button locking is switched on and is disabled
with the pin code you enter here.
iIf you have forgotten the pin code, you can always cancel
button locking with pin code 0012.
7.3 Setting the language
If you have the international version of the iSense, then you
can set the language for the menus via Menu > Settings >
Users > Language.
7.4 Setting the usage mode
You can select the user mode using Menu > Settings >
Users > User mode:
• Basic: no clock programs can be used in this mode. You
can only set the temperature on the thermostat manually.
• Normal: this is the standard mode. Most options are
available, such as the clock program.
• Advanced: this mode lets you use two standard clock
programs (A and B), change more settings and request
more detailed operating information.
iSome settings can only be changed in the "Advanced"
mode. The settings you create remain enabled in the
"Basic" and "Normal" modes.
7.5 Resetting factory settings
Using Menu > Settings > Users > Reset lets you restore all
the settings of the iSense, including the clock program, to the
factory settings.

16
Remeha iSense
7.6 Calibration
Using Menu > Settings > Users > Calibration lets you adjust
the measured value from the inside and outside sensor. This
can be useful if the measured temperatures do not correspond
to what you are used to.
Imagine that the measured temperature is 0.5°C higher than
what you are used to. You can then enter an adjustment here
of -0.5°C.
7.7 Restore connection to iBase (iSense RF only)
You must restore the connection if the iSense RF or the iBase
is replaced. Proceed as follows:
1. Put the iBase in connection mode. Consult the iBase
manual for this.
2. On the iSense select Menu > Settings > Users >
Connection.
After a few seconds the connection is restored.
7.8 Setting the date and time
Set the following via Menu > Settings > Date/time:
• Set time
• Set date
• Summer time:
- Europe: the iSense automatically switches between
European summer time and winter time.
- Elsewhere: you can set the start and end of summer time
yourself by indicating the month and the week.
The time changes on the Sunday.
- Manual: the iSense does not switch between summer time
and winter time. The time must be changed manually.

17
8. Comfort correction
It feels more comfortable when the radiators in the home are
hot (between 50°C and 90°C): the "perceived temperature" is
higher than the real temperature due to the radiant heat. The
comfort correction ensures that the central heating does not
heat to a temperature that is higher than the desired "perceived
temperature".
For example: the desired temperature is 21°C. The radiant
heat from the radiators means that 20.7°C feels like 21°C. The
comfort correction ensures that the central heating does not
carry on heating once the temperature has reached 20.7°C.
Change the comfort correction via Menu > Settings > System >
Temperature > Comfort corr.
iThe comfort correction option is enabled by default.

18
Remeha iSense
9. Tap water settings
9.1 Preventing legionella
The tap water can be heated to 65°C once a week to prevent
legionella in your boiler. This measure can be used for external
boilers if necessary, but not for combi-boilers.
When this setting is enabled, the tap water is heated by default
on Mondays during the night at 02.00.
You can change this setting via Menu > Settings > DHW >
Anti-Legionella.
iTo ensure this function works correctly, check whether any
settings have to be made on the boiler for this function to
be permitted. The boiler must allow an increased tap water
temperature.
9.2 Controlling the tap water temperature
You can set whether and when the temperature of the tap
water may drop in order to save energy. This can be done at
night, for example, when the demand for hot tap water is lower.
The iSense has two settings for this:
• Standby
• DHW temperature
iBoth functions are active simultaneously.
iThe symbol is shown in the display when DHW
standby is switched off.
DHW standby
The combi-boiler pre-heats periodically in order to be able to
quickly meet the demand for hot tap water. You set this option
via Menu > Settings > DHW > Standby.
You can choose from the following options:
• Continuous off: the combi-boiler does not keep itself hot.
Select this option for maximum energy saving.
• Continuous on: the combi-boiler keeps itself hot
continuously.
Select this option for optimum comfort.
• Night temp. off (symbol visible in display): the combi-
boiler is not pre-heated if the desired room temperature is
the same as or lower than the night temperature that is set
via Menu > Program > Night temp. For example: if the
Night temp. setting is 15°C, then the water in the example
day given below is not kept hot in the shaded time periods.
20°C
15°C
21°C
15°C
erutarepmetmoorderiseDemiT
7:00
9:00
11:00
13:00
15:00
17:00
19:00
21:00
23:00
0:00
T001045-06-A
Select the option Night temp. off to save energy during the
night.
iBoilers respond differently to this function. Some do provide
hot water, but take longer to get up to temperature. Others
only provide the heat that is still present, for example in a
boiler, and the water becomes cold after that. Consult your
boiler documentation for more information about this.

19
Tap water temperature
1. Select Menu > Settings > DHW > DHW temp.
2. Select one of the following options:
- Temperature: select the temperature that the hot tap water
must have continuously.
- Clock program: use a clock program to determine the
temperature of the tap water. Setting this clock program is
virtually identical to setting a clock program for the desired
room temperature.
This is described in paragraph 5.1.
iThe maximum temperature that can be set depends on the
boiler settings.
iWhen setting a clock program, start this an hour before you
first require hot water.
This gives the boiler sufficient time to heat up.

20
Remeha iSense
10. Central heating settings
You can set a number of specific central heating settings via
Menu > Settings > System > CH system:
• Pump control: when this option is switched on, the pump
switches off when there is no demand for hot water. This
means the pump runs for less time (electricity saving).
As the pump is off if the boiler is not on, it may take a few
minutes for a radiator to actually fill with hot water when you
turn it on.
• Heating rate: this allows you to determine how quickly or
slowly the controller responds.
This parameter affects the pre-heating and the control
response.
iSet this to Slowest for underfloor heating.
• Cooling rate: this allows you to indicate how quickly
the home cools or how well your home is insulated. The
better the insulation, the slower the home cools down.
This parameter affects the control strategies "RTC" and
"OTC+comfort" and the off-periods between the burner
coming on. "Slowest cooling rate" gives long off-periods
between the burner coming on. "Fastest cooling rate" has
short off-periods.
• Max. pre-heat: the maximum time (in minutes) that pre-
heating can begin before a switch point.
• Min. CH temp.: minimum desired temperature of the
central heating water. This setting is particularly useful for
convectors.
• Max. CH temp.: maximum temperature of the control
for the central heating water. This is not the maximum
temperature of the boiler.
Note: if this concerns a safety function this must be set on
the boiler.
The engineer installing the iSense can set a number of specific
settings.