nilan Comfort 250L-350L User manual

USER MANUAL
Comfort 250L-350L / Comfort 250L-350L Polar
Gateway
CTS400 BY NILAN
Version 1.00 - 02.05.2022
B75 Comfort 250L-350L GB

2
General information
Safety ............................................................................................................................................................................................................3
Power supply .........................................................................................................................................................................................3
Introduction ..................................................................................................................................................................................................3
Documentation ......................................................................................................................................................................................3
Data plate ...............................................................................................................................................................................................4
App option
Nilan User App ..............................................................................................................................................................................................5
Introduction ...........................................................................................................................................................................................5
Explanation of main screen items ......................................................................................................................................................5
Temperature ..........................................................................................................................................................................................5
Ventilation ..............................................................................................................................................................................................6
Domestic hot water ..............................................................................................................................................................................6
Air humidity ...........................................................................................................................................................................................7
CO2 settings ...........................................................................................................................................................................................7
Filter replacement ................................................................................................................................................................................8
Show data ...............................................................................................................................................................................................8
Trend curve ............................................................................................................................................................................................8
Control panel
Control panel functions ..............................................................................................................................................................................9
Functional overview .............................................................................................................................................................................9
Fan speed level ......................................................................................................................................................................................9
Warnings and alarms ......................................................................................................................................................................... 10
Damper test ........................................................................................................................................................................................ 11
Control panel locked .......................................................................................................................................................................... 11
Service and maintenance
Generally ............................................................................................................................................................................................. 12
Regular maintenance ............................................................................................................................................................................... 12
Filters ................................................................................................................................................................................................... 12
Illustration of filter change ............................................................................................................................................................... 13
Annual maintenance ................................................................................................................................................................................ 14
General cleaning ................................................................................................................................................................................. 14
Water trap ........................................................................................................................................................................................... 14
Heat exchanger .................................................................................................................................................................................. 15
Check air intake and discharge ........................................................................................................................................................ 15
Check ventilation ducts .................................................................................................................................................................... 15
Product data
EU/EC Declaration of Conformity ................................................................................................................................................... 16
Ecodesign data Comfort 250L ......................................................................................................................................................... 17
Ecodesign data Comfort 350L ......................................................................................................................................................... 18
............................................................................................................................................................................................................... 18
Disposal
The environment - part of the solution ................................................................................................................................................ 19
Ventilation unit ................................................................................................................................................................................... 19

3
General information
Safety
Power supply
Introduction
Documentation
The following documents will be supplied with the unit:
• Quick guide
• Wiring diagram
In the Quick guide you will find important information regarding installation and start-up of the unit. If you require further information
regarding, for instance, installation of accessories or additional settings in the software, or if you need an extended user manual, the
following documents can be downloaded from the Nilan website:
• Installation instructions
• Software instructions
• User Manual
• Wiring diagram
The instructions can be downloaded from www.nilan.dk.
If you have questions regarding installation and operation of the unit after having read the instructions, please contact your nearest
Nilan dealer. A list of Nilan dealers is available on www.nilan.dk.
From factory, the unit has been tested and is ready for operation.
CAUTION
Always disconnect the power supply to the unit if an error occurs that cannot be rectified via the control panel.
CAUTION
If an error occurs on electrically conductive parts of the unit, alway contact an authorised electrician to rectify the error.
CAUTION
Always disconnect the power to supply to the unit before opening the unit doors, for instance for installation, inspection,
cleaning and filter change.
ATTENTION
The unit must be started up immediately after installation and connection to the duct system.
When the ventilation unit is not in operation, humidity from the rooms will enter the duct system and create condensate
water that can run out of the valves and cause damage to floors and furniture. Condensation may also form in the ven-
tilation unit, which can damage its electronics and fans.

4
Data plate
Nilan’s data plate is situated on the top left of the unit.
ATTENTION
When contacting Nilan with questions about the product, it is important to have the unit name and serial no. (SN) ready.
From this information, the service department can find all information about the unit in question and thus help with
information and answer questions about what the unit consists of/contains, and what software is used.
The type of the ventilation unit can also be found in the user panel menu under “Show data”.

5
App option
Nilan User App
Introduction
The following instructions are general and apply to all Nilan ventilation units. Some of the shown functions and settings may therefore
not exist on your ventilation unit. The user settings that are applicable to exactly your ventilation unit will more or less correspond to
those displayed in the Nilan User APP on your phone.
If you require a detailed description of individual functions and settings, you can download the software instructions for your ventila-
tion unit from our website.
Explanation of main screen items
Temperature
1. On the main screen under the Nilan logo, you will see the number of the con-
nected Gateway.
Under settings, you can name the ventilation unit e.g. Home or Holiday home.
The name will then be displayed instead.
If you have more than one ventilation unit connected to the APP, you will be able
to see to which unit the shown data apply.
Next to the number is a WiFi icon that is green when there is connection to the
unit, and red if the connection is interrupted.
2. Here you can see the items that are relevant to your ventilation unit. If there
are too many items to fit the screen simultaneously, the rest will be below the
displayed items. You can access these by using your finger to scroll up.
If you press one of the items on the screen briefly, a settings menu will appear.
3. Shortcut key to return to main screen.
4. If you press this icon, you will see a list of all current and relevant data.
5. If you press this icon, you will get to a page where you can see a trend curve for
relevant data.
6. Pressing this icon will take you to settings where you will be able to add more
ventilation units.
7. The alarm icon will be displayed if an alarm is triggered on the unit. By pressing
the icon, you will get an outline of the most recent alarms.
If more ventilation units are connected to the same APP, you will have to go into
settings and select unit in order to see to which unit the alarm applies.
1. Press “back” to return to the previous page.
2. You can set the room temperature by scrolling up or down with your finger on
the icon. When the ventilation unit is operating in heating mode, the thermom-
eter is red. In cooling mode it is blue, and during neutral operation orange.
3. The icon for heating settings may be displayed if you have installed an after-
heating element. Press this icon to access heating settings.
4. Here you can see the current room temperature.
5. Here you can see the desired room temperature.
6. The cooling icon will be displayed if the unit has active cooling via a heat pump.
Press this icon to access the cooling settings.
7. If you scroll up the items with your finger, a menu appears where you can select
from the options AUTO, HEAT and COOL.

6
Ventilation
Domestic hot water
1. Press “back” to return to the previous page.
2. Here you can set the fan speed level you want. The fan speed level that you
have selected may differ from the one displayed on the main screen. This is
because the unit is able to override the set fan speed level, e.g. at high/low
humidity.
1. Press “back” to return to the previous page.
2. If you scroll down with your finger, you can read off the current temperature of
the hot water.
3. You can set the domestic hot water by scrolling up or down with your finger on
the icon. It is indicated under the thermometer when the unit is producing
domestic hot water. The colour inside the thermometer changes in accordance
with the temperature. A temperature >40°C is red, 30-40°C is orange, and
<30°C is blue. Then you can see whether there is enough hot water for a bath.
4. Here you can see the current setting of the hot water temperature.
5. Press this icon to access more settings.
6. Press here to deactivate the production of hot water. You can reactivate the
hot water production by using your finger to scroll up the thermometer and
select the desired water temperature.
The settings icon (5) gives you access to settings related to supplementary electric
heating and anti-legionella measures.
1. Press “back” to return to the previous page.
2. Here you can choose at what temperature the supplementary electric heating
should be activated in order to help heat the domestic hot water.
3. Here you can deactivate the supplementary electric heating.
4. Here you can turn off the anti-legionella treatment. You can also set a particu-
lar day during the week for anti-legionella treatment.

7
Air humidity
CO2 settings
1. Press “back” to return to the previous page.
2. Here you can set the value for low level of humidity between 15– 45%.
3. Here you can set the fan speed level for low humidity between level 1 – 3. You
can also deactivate the function.
4. Here you can set the fan speed level for high humidity between level 2 – 4. You
can also deactivate the function.
5. Here you can set the maximum time at high humidity.
6. Press this icon to access more settings.
1. Press “back” to return to the previous page.
2. Here you can set the temperature to prevent low outdoor temperature
between -20 – +10°.
3. Here you can set the fan speed level to prevent low humidity between level 1–
3. You can also deactivate the function.
1. Press “back” to return to the previous page.
2. Here you can set the value for normal CO2level between 400 - 700.
3. Here you can set the value for high CO2level between 650 - 2500.
4. Here you can set the fan speed level between level 2 - 4. You can also deacti-
vate the function.

8
Filter replacement
Show data
Trend curve
1. Press “back” to return to the previous page.
2. Here you can set the amount of days between filter replacements.
3. Here you can reset the alarm for filter replacement.
4. Here you can turn off the ventilation unit before filter replacement and turn
the unit on again afterwards.
ATTENTION
Remember never to leave the unit off for a long period of time as con-
densate water may form in the unit and duct system and subsequently
cause damage.
You can read off current operational data for the ventilation unit. This will allow you
to check that the unit operates satisfactorily and to identify the cause of potential
alarms.
It is possible to see a Trend curve on various parameters - depending on
which ventilation unit you have.

9
Control panel
Control panel functions
Functional overview
Fan speed level
Level 1 can be used if you are going to be away for a while, e.g. on holiday for a couple of weeks.
NB: When the unit is operating at low air humidity level, it can be set to operate at fan speed level 1.
Level 2 is for standard operation. The air volume at level 2 is the standard air volume for which the dwelling has been balanced.
NB: The automatic humidity control system alters the function of the unit to run high or low flow ventilation as required.
Level 3 can be used if you have visitors or if, for instance, you have candles burning in the dwelling.
NB: Remember to reduce the fan speed to level 2 once your visitors have left.
Level 4 can be used if, for instance, you are having a party and a large crowd of people are gathered in the dwelling. The unit can also
be set at high humidity level.
NB: This level is also used during cooker hood operation if the cooker hood is connected to the ventilation unit.
If an alarm is triggered in the ventilation unit, the yellow LED will flash. Alarms are divided into 3 categories: Information, warning and
critical alarm.
The following functions are available with the CTS 400 panel:
1. Power on and off button
2. Yellow LED light: Constantly flashing or lit by warnings or alarms
3. Green LED light: The number of lit LED lights indicates the desired fan speed level
4. Switching the fan speed level from 1-4 is done by pressing the arrow, after fan
speed level 4 fan speed level 1 appears again.
ATTENTION
When the unit is overridden by user selection, humidity, defrost, etc., the
desired fan speed level will be lit green, but the current fan speed level will
flash. By pressing the arrow, the unit will go to the desired fan speed level -
until the next event.
ATTENTION
Do not turn off the unit unless, for instance, an emergency notification asks residents to stay indoors, close windows and
doors, and turn off ventilation units.
If the unit is off for long periods of time, dampness in the ducts can cause condensation and subsequently mould growth.

10
Warnings and alarms
If an alarm is triggered in the ventilation unit, the yellow LED will flash. Alarms are divided into 3 categories: Information, warning and
critical alarm.
INFO
The alarm displays a piece of information that needs your attention, e.g. that filters need replacing.
The ventilation unit remains in operation.
The yellow LED stays on:
Filters need replacing.
Replace filters, clean the unit and reset the alarm.
Resetting the alarm:
Press the On/Off button and the button with the arrow at the same time and hold for 10 seconds.
ATTENTION
The alarm displays a warning that needs your attention. The ventilation unit continues to operate, but in emergency
mode.
Briefly, press the On/Off button and the button with the arrow simultaneously. One of the green diodes will flash and dis-
play the following error types.
The yellow diode and the first green diode are flashing:
The temperature sensor has either short-circuited or been disconnected.
Register the error and contact service. Reset the alarm once the error has been rectified.
Resetting the alarm:
Press the On/Off button and the button with the arrow at the same time and hold for 10 seconds.
The yellow diode and the second green diode are flashing:
The humidity sensor or the CO2 sensor has either short-circuited or been disconnected.
Register the error and contact service. Reset the alarm once the error has been rectified.
Resetting the alarm:
Press the On/Off button and the button with the arrow at the same time and hold for 10 seconds.
The yellow diode and the third green diode are flashing:
The thermostat in the after-heating has short-circuited or been disconnected.
Make a note of which sensor is faulty and contact service. Reset the alarm once the error has been
rectified.
Resetting the alarm:
Press the On/Off button and the button with the arrow at the same time and hold for 10 seconds.