nilan Comfort 350L User manual

USER MANUAL
Comfort 350L / Comfort 350L Polar
CTS602 LIGHT BY NILAN
Version 1.00 - 02.05.2022
B24 Comfort 350L GB

2
Table of contents
General information
Safety ............................................................................................................................................................................................................3
Power supply .........................................................................................................................................................................................3
Introduction ..................................................................................................................................................................................................3
Documentation ......................................................................................................................................................................................3
Data plate ...............................................................................................................................................................................................4
Control panel
Control panel functions ..............................................................................................................................................................................5
Main screen items .................................................................................................................................................................................5
Main screen settings options ..............................................................................................................................................................5
Warnings and alarms ............................................................................................................................................................................6
Settings menu overview ......................................................................................................................................................................6
Service and maintenance
Generally ................................................................................................................................................................................................7
Regular maintenance ..................................................................................................................................................................................7
Filters ......................................................................................................................................................................................................7
Illustration of filter change ..................................................................................................................................................................8
Annual maintenance ...................................................................................................................................................................................9
General cleaning ....................................................................................................................................................................................9
Water trap ..............................................................................................................................................................................................9
Heat exchanger .....................................................................................................................................................................................9
Check air intake and discharge ........................................................................................................................................................ 10
Check ventilation ducts .................................................................................................................................................................... 10
User settings
Setting the ventilation unit ..................................................................................................................................................................... 11
Turn off the ventilation unit ............................................................................................................................................................. 11
Alarm .................................................................................................................................................................................................... 11
Show data ............................................................................................................................................................................................ 12
Date/time ............................................................................................................................................................................................ 12
Week programs .................................................................................................................................................................................. 13
Supply air heating .............................................................................................................................................................................. 14
After-heating element ...................................................................................................................................................................... 15
Humidity control ................................................................................................................................................................................ 15
CO2 Control ......................................................................................................................................................................................... 16
Air exchange ....................................................................................................................................................................................... 16
Filter alarm .......................................................................................................................................................................................... 17
Temperature control ......................................................................................................................................................................... 18
Language ............................................................................................................................................................................................. 18
Alarm list
Comfort ...................................................................................................................................................................................................... 19
Alarm list ............................................................................................................................................................................................. 19
Product data
EU/EC Declaration of Conformity ................................................................................................................................................... 21
Ecodesign data Comfort 350L ......................................................................................................................................................... 22
............................................................................................................................................................................................................... 22
Disposal
The environment - part of the solution ................................................................................................................................................ 23
Ventilation unit ................................................................................................................................................................................... 23

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”.

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Control panel
Control panel functions
Main screen items
The main screen of the HMI panel shows the information and the settings options that a user mostly requires.
Main screen settings options
The settings options that are necessary in daily life can all be set on the main screen of the panel.
1. Shows the current room temperature in the house,
measured via the extract air
2. Shows the current fan speed level
3. Shows the current air humidity in the extract air
4. Shows the current CO2 level in the extract air
(Does not appear if sensor is not installed)
5. Shows operation ikon (see below)
6. Access to the settings menu, where there are several opti-
ons.
Icon User programe active Icon Ventilation unit has stopped
Icon Week programe active Icon Active alarm or warning
If you press current fan speed level, the set fan speed level will
be displayed.
You can change the fan speed level by using the up-and-down
arrows followed by the confirm icon (bottom right) or the cancel
icon (bottom left).
There may be a difference between set fan speed level and the
actual fan speed level as the control system will override the
set level, for instance, at high/low air humidity or during cooker
hood operation.
If you press current room temperature, the set room
temperature will be displayed.
You can change the room temperature by using the up-and-
down arrows followed by the confirm icon (bottom right) or the
cancel icon (bottom left).

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Warnings and alarms
Settings menu overview
The settings menu is constructed to make it easy to navigate through.
If the ventilation unit is faulty or an error
occurs, there will be either a warning or
an alarm. The icon will appear in the top
right hand corner in the menu bar.
If you press the symbol, a brief descrip-
tion of the warning or the alarm will be
displayed.
You will find more detailed descriptions in
the "Alarm List" section of this document.
When the problem has been solved, you
can reset the warning or alarm by
pressing “Clear Alarm”.
You navigate through the settings menu by pressing the arrow below or above.
If you want to access a menu, tap the text for that menu and it will open.

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Service and maintenance
Generally
A ventilation unit from Nilan can last for many years if it is properly serviced and maintained. Ventilation units are often hidden away,
and they are therefore rarely given attention in everyday life. But just as you maintain your car, your ventilation unit will need servic-
ing regularly to keep it functioning properly.
If appropriate service and maintenance are not carried out, the ventilation unit may get damaged. It can also result in increased energy
consumption and a poorer indoor climate. Less air will run through the unit even if the fans are running faster. But the ventilation unit
does not operate well with dirty filters, a clogged up heat exchanger and dusty fans.
You can set an alarm in your calendar on your phone that will notify you when your ventilation unit is due a service. Alternatively, you
can make a service appointment with your local Nilan dealer or service company.
Regular maintenance
Filters
The primary purpose of the filters is to protect the ventilation unit and especially the heat exchanger and the fans that could otherwise
become damaged by dust and dirt.
Dirty filters result in a poorer indoor climate and a higher energy consumption. Dirty filters must therefore be replaced. Dirty filters
can also affect the humidity control system in the ventilation unit so it no longer works as intended.
The factory setting of the control system is set to 90 days, which will suit most installations. But if you live in a city close to a heavily
congested road, you may need to replace the filters more often. Conversely, if you live in a rural setting, you may not need to replace
filters quite as often.
The standard filters in the ventilation unit are ISO Coarse > 65% (G4). If you install a pollen filter ISO ePM1 50-65% (F7), you will not
need to replace the pollen filter as often, as its filter area is larger. It may then only be necessary to replace the pollen filter every sec-
ond or third time, depending on its condition.

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Illustration of filter change
1.Before opening the door, switch off the unit on the con-
trol panel under OPERATION.
2. Loosen the brackets in the door and tilt the left door to
the side.
3. Remove the two filters from the unit. 4. It is advisable that you vacuum the filter chambers for
potential dirt and dust.
5. Remove the filter sheet from the filter frame. 6. Keeping the smooth side facing downwards, place the
new filter sheet in the filter frame.
7. Press the filter sheet firmly in place and carefully push
it to the sides of the filter frame.
Place the filter in the unit with the filter sheet facing
upwards.
8. Turn on the unit and press the ALARM icon to reset the
warning.

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Annual maintenance
General cleaning
The ventilation unit should be cleaned on the inside once a year. Dust may escape through the filters and potentially mix with moisture
from the extract air.
You may want to vacuum the ventilation unit before you clean it on the inside using a slightly damp cloth. Be careful around potentially
sharp edges. Be careful not to get water into the electrical control system.
The ventilation unit should also be cleaned on the outside using a slightly damp cloth and a mild detergent.
Valves in the ceiling
Over time a ring may develop around the inlet valves. This is a natural occurrence caused by dust in the air in the room. It is not due to
defective filters or filters not being replaced.
Since painted ceilings are only rarely washable, we recommend that you vacuum the area around the valves before wiping them with
a slightly damp cloth.
It is a good idea to detach the valves and then clean them when necessary. The valves have been set by the installer at a specific air
volume, so it is important that you do not turn them, as this will change the setting and unbalance the ventilation system.
Water trap
During cold periods when the ventilation unit operates with high efficiency heat recovery, the extract air creates condensation. It is
important that this water can drain freely from the condensate tray. If it cannot drain properly, it will eventually leak out of the unit
door and, potentially, cause water damage.
Water trap with ball
1. Pour water into the condensate tray and check that it drains away
2. If the water drains away, everything is in order
3. If the water does not drain away, you should check the water trap and the drain to locate any blockages
Water trap without ball
1. Pour water into the condensate tray
2. Close the door of the ventilation unit
3. Start the ventilation unit and let it run for 10 minutes
4. Open the door of the ventilation unit and check that the water has drained away and that it has not run back into the condensate
tray
5. If the water has drained away, everything is in order
6. If the water has not drained away, you should check the water trap and the drain to locate any blockages
Heat exchanger
The counterflow heat exchanger is a central part of the ventilation unit. It heats up the cold outdoor air with energy from the warm ex-
tract air. To maintain a high level of heat recovery, it is important that the heat exchanger is not clogged with dirt.
Experience indicates that it should not be necessary to lift out and clean the heat exchanger every year. However, if it appears to be
dirty, you should lift it out and clean it.
The easiest way to clean the counterflow heat exchanger is in the shower. Use lukewarm water and rinse it well from both sides. Allow
it to drip off before remounting it in the ventilation unit.
WARNING
Stop the ventilation unit on the control panel and switch off the power supply for the ventilation unit before you open
the front door to the unit.
ATTENTION
If you have not installed a water trap with ball, you must check the condensate drain every autumn before the weather
turns cold. (Condensation typically forms when the outdoor temperature < 10°C)

10
Check air intake and discharge
It is important for operation of the unit that air can freely move through the air intake and discharge.
If roof stacks have been fitted to the air intake and discharge, check that they are not blocked with birds' nests, leaves or other dirt
which can hamper air passage.
If, instead of roof stacks, grilles have been mounted in facades or eaves, check that they are not clogged with leaves or dirt. Grilles are
particularly likely to become clogged.
Check ventilation ducts
It is important for operation of the unit that there is free air passage through the ventilation ducts.
After some years of operation, dirt will attach itself to ventilation ducts or tubes, and accumulations may lead to higher pressure drop
in the ducts, leading to higher power consumption. It is therefore important to clean out the ducts when too much dirt has collected.
After attending to the inlet and outlet valves, it will be advisable to have them adjusted again, to ensure optimum operation of the ven-
tilation system.
However, it will not be necessary to clean ducts more than every few years.