nilan Comfort 252 TOP, CTS150, Comfort 302 Top, Comfort 200 Top Installation Instructions Manual

INSTALLATION INSTRUCTIONS

CTS150 B

Y NILAN

Comfort 252 / 302 Top (English)

Version 2.03 - 07.07.2017

TABLE OF CONTENTS

S

afety

Warnings........................................................................................................................................................................................................................................................................................... 4

Power supply................................................................................................................................................................................................................................................................... 4

Disposal............................................................................................................................................................................................................................................................................................. 4

Ventilation system....................................................................................................................................................................................................................................................4

General information

Introduction.................................................................................................................................................................................................................................................................................. 5

General information prior to installation.........................................................................................................................................................................................5

Final inspection......................................................................................................................................................................................................................................................................... 5

How to set up the ventilation system.................................................................................................................................................................................................. 5

Unit type........................................................................................................................................................................................................................................................................................... 6

Product description..................................................................................................................................................................................................................................................6

Dimensional drawing ............................................................................................................................................................................................................................................. 7

Accessories................................................................................................................................................................................................................................................................................... 8

Electrical preheating element for frost protection.............................................................................................................................................................. 8

User option/cooker hood solution ..........................................................................................................................................................................................................8

Pollen filter F7................................................................................................................................................................................................................................................................ 8

Water trap...........................................................................................................................................................................................................................................................................8

Vibration absorbers.................................................................................................................................................................................................................................................8

Flexible silencing..........................................................................................................................................................................................................................................................9

Installation

Installation..................................................................................................................................................................................................................................................................................10

Placement of the unit ........................................................................................................................................................................................................................................ 10

Top unit ............................................................................................................................................................................................................................................................................. 10

Electrical installation

Electrical connections.................................................................................................................................................................................................................................................... 11

Safety.................................................................................................................................................................................................................................................................................. 11

Connection overview.......................................................................................................................................................................................................................................... 11

User panel....................................................................................................................................................................................................................................................................................12

CTS150 control-panel ...................................................................................................................................................................................................................................... 12

Connecting the user-panel .......................................................................................................................................................................................................................... 12

Electrical connection, unit......................................................................................................................................................................................................................................... 13

Supply.................................................................................................................................................................................................................................................................................. 13

Unit ........................................................................................................................................................................................................................................................................................ 13

Electrical connections assessories................................................................................................................................................................................................................. 14

User select/cooker hood solution ....................................................................................................................................................................................................... 14

External electrical preheating element ........................................................................................................................................................................................ 15

Plumping

Condensate drain................................................................................................................................................................................................................................................................ 16

Important information ..................................................................................................................................................................................................................................... 16

Connection bottom............................................................................................................................................................................................................................................... 17

Plumping connections for accessories........................................................................................................................................................................................................ 18

Water lock with ball (option)....................................................................................................................................................................................................................... 18

Ventilation installation

Duct system.............................................................................................................................................................................................................................................................................. 19

Legislation...................................................................................................................................................................................................................................................................... 19

Ducts..................................................................................................................................................................................................................................................................................... 19

Unit.......................................................................................................................................................................................................................................................................................... 19

Extract air........................................................................................................................................................................................................................................................................ 20

Supply air......................................................................................................................................................................................................................................................................... 20

2

Roof stack....................................................................................................................................................................................................................................................................... 20

I

nstallation example.............................................................................................................................................................................................................................................21

Balancing...................................................................................................................................................................................................................................................................................... 21

Important information...................................................................................................................................................................................................................................... 21

Balancing connectors......................................................................................................................................................................................................................................... 21

Pressure drop diagram .................................................................................................................................................................................................................................... 22

Software settings

User-panel.................................................................................................................................................................................................................................................................................. 23

Functions.......................................................................................................................................................................................................................................................................... 23

Alarms ................................................................................................................................................................................................................................................................................ 23

Settings.......................................................................................................................................................................................................................................................................................... 24

Installing of PC programme......................................................................................................................................................................................................................... 24

PC-setting tool .......................................................................................................................................................................................................................................................... 26

List of adjustable parameters ................................................................................................................................................................................................................. 27

Operation..................................................................................................................................................................................................................................................................................... 28

Bypass function........................................................................................................................................................................................................................................................ 28

Humidity control...................................................................................................................................................................................................................................................... 28

Replacing the filter................................................................................................................................................................................................................................................29

Comfort 252 / 302 Top (English)

BY NILAN

3

Safety

Warnings

Power supply

CAUTION

A

lways disconnect mains electricity to the unit if a fault occurs which cannot be rectified via the

control panel.

CAUTION

I

f a fault occurs on the electricity-conducting elements of the unit, always contact an

authorised electrical installer to rectify the fault.

CAUTION

A

lways disconnect mains electricity to the unit before opening the doors, e.g. for installation,

inspection, cleaning and filter change.

Disposal

Ventilation system

Nilan units mainly consist of recyclable materials. They should therefore not be
d

isposed of with household refuse. Take them to your local recycling centre.

4

General information

Introduction

General information prior to installation

T

he following documents are supplied with the unit:

• Installation instructions/Software instructions

• User manual

• Wiring diagram

The instructions can be downloaded from the Nilan website: http://www.nilan.dk/da-dk/forside/
download

If you have further questions on unit installation after reading the instructions, contact your nearest
Nilan distributor, who can be found on www.nilan.dk/forhandlere.

The purpose of these instructions is to give the installer advice on correct installation and maintenance
of the unit.

The unit must be started up immediately after installation and connection to the duct system. In
periods where the ventilation system is not in operation, humid air from the rooms may penetrate into
the ducts and form a condensate. The condensate may leak out of the valves and damage furniture and
floors. In addition, condensate may form inside the unit, damaging the unit's electronics and fans.

The unit is supplied fully tested and ready for operation.

Final inspection

How to set up the ventilation system

T

his list is for helping the installer with the settings to be made in consultation with the user or client.

Function Settings

Setting for filter change period Days:

If low-speed ventilation is required in case of low outdoor
t

emperature

Yes/No

Speed:
A

t °C:

If low-speed ventilation is required in case of low air humidity Yes/No Speed:

If high-speed ventilation is required in case of high air humidity Yes/No Speed:

The set speed for basic ventilation Speed:

The desired room temperature °C:

Comfort 252 / 302 Top (English)

BY NILAN

5

Unit type

P

roduct description

Comfort 252 / 302 Top is a ventilation unit with heat recovery. The unit is designed for air flows up to
253/345 m3/h at 100 Pa external duct pressure.

The unit draws the humid, vitiated air out of the dwelling via the bathroom, WC, kitchen and utility room
and introduces fresh outdoor air into habitable rooms such as living room, bedrooms and office. The
cold outdoor air is heated up in the heat exchanger by the warm exhaust air.

Comfort 252 / 302 Top is supplied as standard with a G4 filter in the outdoor air and extract air ducts. If
it is wished to filter the outdoor air for pollen, an F7 filter can be purchased as an accessory and
mounted subsequent.

1. Duct connections
2

. Electrical connections

3. Extract air filter G4

4. Outdoor air filter G4 (F7 filter is fitted here)

5. Bypass damper

6. Counterflow heat exchanger

7. Condensate drain

8. Supply air fan (inlet air)

9. Extract air fan (outlet air)

10. Automatic control system

6

Dimensional drawing

A

ll dimensions are in mm.

Connections:

1

. Fresh air (outdoor air)

2. Supply air

3. Extract air

4. Discharge air

5. Condensate drain

Comfort 252 / 302 Top (English)

BY NILAN

7

Accessories

E

lectrical preheating element for frost protection

In longer periods of sub-zero temperatures, the high-efficiency counterflow heat
e

xchanger will ice up. To avoid icing, it is recommended that an electrical

preheating element is mounted.

The preheating element uses very little energy, but ensures efficient heat
recovery without de-icing, thus achieving an overall saving in energy
consumption.

User option/cooker hood solution

It is possible to activate user selection mode via a potential-free contact. When
t

he contact is activated the unit change to fan level four and overrides all other

functions.

The set include a distribution cable with two RJ12 connectors and 10 m cable to
connect to eg a cooker hood or a contact.

Pollen filter F7

The unit is supplied as standard with a G4 filter.

I

f persons in the dwelling suffer from a pollen allergy, there is an option for
mounting a F7 pollen filter in the outdoor air inlet to minimise the pollen in the
indoor air.

Water trap

To ensure that the condensate can drain off freely, a water trap must be
established.

The water trap must be regularly checked for water. In the summer season,
where no condensation will occur, there is a risk of the water trap drying out. The
Nilan water trap contains a ball which cease to prevent "false" air intake into the
unit, so that condensate can run freely out of the unit.

Vibration absorbers

4 pc. of vibration absorbers are placed under the unit and secure an effective
d

imming of the vibrations of the unit againt the surface.

8

Flexible silencing

To facilitate later servicing of the unit, we recommend fitting a flexible
c

onnection between the unit and the duct system.

Nilan's sound damping flexi-hose gives good sound damping both to the duct
system and to roof stacks.

Comfort 252 / 302 Top (English)

BY NILAN

9

Installation

Installation

Placement of the unit

ATTENTION

W

hen fitting the unit you should always take future service and maintenance in consideration.

It must be easy to replace the filters and ef it must be possible to take out the heat exchanger,
fan or other components.

ATTENTION

A minimum distance of 60 cm in front of the unit is recommended for workspace.

ATTENTION

T

he unit must be installed level for the sake of the condensate drain.

The unit is low-noise and low-vibration. However potential vibrations spreading from the unit to the
individual building parts must be taken into account. To detach the system from the floor, we
recommend that the system is placed on vibration absorbers. To other building parts and other fixtures
there should be a distance of about 10 mm.

The unit can be installed both inside and outside the building envelope because it is isolated and meets
the requirements for heat loss.

Top unit

Min. 20 cm

Min. 50 cm

Min. 60 cm

Service area in front of the unit

ATTENTION

I

f a cover is used to protect the unit, this must be easy to remove.

10

Electrical installation

Electrical connections

Safety

ATTENTION

A

ll work must be carried out by qualified personnel and in accordance with applicable legislation

and regulations.

ATTENTION

I

t is important that power is disconnected when working with the unit's electrical components.

It is important to check that cables have not been damaged or trapped during connection and use.

C

onnection overview

All connections are at the top of the unit in the right side, seen from the front.

1. Connecting 230V (remember grounding)

2. Connecting userpanel

3. Connecting PC (USB AB kabel)

Comfort 252 / 302 Top (English)

BY NILAN

11

User panel

C

TS150 control-panel

The control-panel comes standard with 4 m cable mounted with RJ11 connectors at each end. One plug
is mounted in the control-panel and the second plug is mounted in the unit.

The cable can be extended to max. 50 m. A 4 wired ribbon flatcable twisted in pairs 2x2, 25 mm2 with

RJ11 connectors are neededmed RJ11 (telephone cable).

Connecting the user-panel

12

Electrical connection, unit

S

upply

CAUTION

P

ower sypply including safety switch must be installed by a certified electrician.

It comes with a power cable for connection in socket. It is important for the unit to be bonded to
earth.

Unit

Power supply

Safety switch

Comfort 252 / 302 Top (English)

BY NILAN

13

Electrical connections assessories

U

ser select/cooker hood solution

User selection of the CTS150 control, is a connector cable connected to the unit. A 10 m cable are
connectet to a potential-free contact. When the contact is activated the unit change to fan level four
and overrides all other functions.

User selection can be used to run a cooker hood with the unit. It can also be used to ventilate out of
balance in supply and extract ventilation.

The user selection set /cooker hood set consists of the following:

• A distributor connector that attaches to the unit in the connector for the control panel

• 10 m of cable with a RJ12 plug mounted in the distributor connector

The user-panel is connected to the distributor connector instead of the unit.

ATTENTION

I

f the 10 m cable is not enough, it is possible to make a longer cable. It is important that the two
outer compounds are used in the RJ12 connector. (The four in the middle are used by the user­panel)

14

External electrical preheating element

I

f the unit is the non-Polar version, an external preheating element can be purchased for retro-fitting.

The electric preheating element is mounted in the outdoor air duct before the unit with the necessary
temperature sensor.

1x230V ~ 50 Hz max. 16A

7 8

Min. 32 cm

T

It is important that the sensor is placed at least 32 cm from the preheating element to achieve correct
r

egulation.

The preheating element is fitted with a three-step safety system to prevent
o

verheating.

1. A thermostat regulates heat and ensures that the supply air temperature does
not go below -1 °C

2. A max. thermostat switches off the preheating element if the temperature
exceeds 50 °C

3. A manual safety thermostat can be used to switch off the preheating element
if the temperature exceeds 100 °C

ATTENTION

W

hen mounting the electric preheating element, there must be a safety gap of minimum 15 cm
from any flammable material. The heating element must be insulated with a fire retardant
insulation material, but the cover on the connection box must not be insulated.

Dimensional drawing:

Ø160

Positioning options:

Comfort 252 / 302 Top (English)

BY NILAN

15

Plumping

Condensate drain

Important information

T

he unit is supplied with dia. 20 mm condensate drain (PVC, GF-fittings).

ATTENTION

A

water trap must be established in the condensate drain in order to ensure that condensate

can drain off.

ATTENTION

I

f the unit is assembled outside the climate screen, it is important to secure the condensate
drain against icing with a heating cable. Frost protection of the unit is the installer's
responsibility.

During operation, a underpressure of up to 500 Pa may develop in the drain, corresponding to
50 mm water column. This water trap must therefore be mounted as shown in order to prevent
drying out and return flow.

The connection of the water trap must be air-tight, otherwise air will be let into the unit and
condensate will remain in the unit. This could lead to water damage if the condensate overflows
the condensate tray and from there out of the unit.

After mounting the water trap, its function is tested as follows (the unit must be connected to
the duct system and the lid must be closed).

The condensation tray are filled with water and the unit is operated at the highest fan speed.
Allow it to run for several minutes. Check that there is no water in the condensation tray when
the test is finished.

The water trap may dry out and thus prevent water escaping from the condensate tray, as air
will be sucked into the unit. The water trap should therefore be checked at regular intervals,
especially in the summer, and filled with water as necessary. Increasing the height of the water
trap compared to the minimum requirements will minimize the need tor refilling.

INFO

N

ilan offers a water trap with a ball. The ball ensures that no air is sucked into the unit through
the condensate drain if the water trap dries out. This ensures that water in the condensate tray
can drain off and it makes it unnecessary to check the condensate drain so often.

16

Connection bottom

Ø20 mm

min. 50 mm

min. 50 mm

Ø20 mm

min. 170 mm

Connection of water trap generally Connection of Nilan water trap with ball

Comfort 252 / 302 Top (English)

BY NILAN

17

Plumping connections for accessories

W

ater lock with ball (option)

Connections for Nilan water lock:

1. Water lock with Ø32 mm spout

2. Reduction spout to Ø20 mm

3. Reduction piece to ¾" RG

4. Reduction spout for ½" hose

18

Ventilation installation

Duct system

Legislation

ATTENTION

A

ll work must be carried out by qualified personnel and in accordance with applicable legislation

and regulations.

Ducts

T

here are two systems for transporting air round the building.

Spiral tubes

Spiral tubes are metal ducts which are cut to size with an angle grinder, screwed together with bends
and manifolds and laid out in accordance with the working drawing. The duct pipes are typically laid at
the rafter ends and fixed with perforated band or suspended with suspension band. Avoid unnecessary
bends in the ducting.

To avoid noise transmission, where sound is transmitted from room to room, a sound damper must be
mounted in each room.

The ducts must be insulated to avoid heat loss and condensation. In some cases this can be avoided if
the ducts are led through the ordinary insulation or inside the climate screen.

NilAIR tubes

NilAIR tubes are a flexible system which is easy to mount. The tubes are easily cut to size with a hobby
knife and laid according to the working drawing without use of bends and manifolds. A manifold box is
installed after the unit and the tubes run from this out to the various rooms.

With NilAIR tubes it is unnecessary to mount sound dampers in each room, as there is no risk of noise
transmission.

If the tubes are led outside the climate screen they must be insulated to avoid heat loss and
condensation. This is easier than with spiral tubing, as NilAIR tubes are easier to lead through ordinary
insulation.

NilAIR tubes are more flexible than spiral tubing and can therefore be laid in places where ordinary
spiral tubing would be impossible.

Unit

Nilan recommends mounting a flexible connection between the unit and the duct system.

This is to avoid oscillations from the unit being transmitted to the duct system, but also to ease future
servicing where it is necessary to move the unit.

Nilan offers flexible silicing, which, apart from providing a flexible connection between the unit and the
duct system, also dampen the passage of sound from the unit to the duct system.

Flexible silencing are insulated for condensation, but it may be necessary to insulate them further to
meet local requirements for duct system insulation.

Comfort 252 / 302 Top (English)

BY NILAN

19

Extract air

E

xhaust valves are mounted in the moisture-generating rooms and strategically placed where they can

extract the moisture air most effectively.

Moisture-generating rooms:

• Bathroom

• Toilet

• Kitchen

• Utility room

Supply air

Supply air valves are mounted in habitable rooms and strategically positioned to give the minimum
annoyance. For example, it is not recommended to mount incoming air valves over areas where people
sit, as the air in some cases can be perceived as a draught.

Habitable rooms:

• Living room

• Kitchen-living room

• Bedroom

• Office

Roof stack

The roof inlet and outlet must be positioned and designed to limit pressure fluctuations in the

ventilation system caused by wind impact, and also to prevent access by birds and other animals, and

to ensure that the inlet and closed duct system are kept free of plant parts and foreign objects.

The air inlet must be located to minimise the risk of short-circuiting from the discharge air, having

regard to the prevailing wind direction.

The air inlet should be placed a minimum of 0.5 m above the roof surface, but a minimum of 1 m over
flat black roofs up to the underside of the inlet, to ensure that warm air is not drawn into the building in
the summer. The air inlet should be located on the north or east sides of pitched roofs.

Sound damping should also be mounted between the unit and roof stacks to avoid noise annoyance to

neighbours.

20

Installation example

Balancing

Important information

ATTENTION

F

or the ventilation system to operate optimally, it is important that initial regulation is carried

out correctly. We recommend having this done by experts.

It is important to measure the total supply (inlet) air and extract (outlet) air. The system must
have a minimum vacuum, i.e. it must draw in more air out than in, to avoid humidity being
pressed into the building construction.

Balancing connectors

T

he unit has balancing connectors for measuring the supply air (inlet air) and extract air (outlet air)

volumes.

The graph can be used for roughly setting the main air flow for dry operation without condensation
precipitation.

On the extract air side (outlet air), the pressure drop dP3-4 [Pa] is measured between the connectors
labelled 3 and 4. The air volume qv [m3/h] is read off on the graph.

On the supply air side (inlet air), the pressure drop dP1-2 [Pa] is measured between the connectors
labelled 1 and 2. The air volume qv [m3/h] is read off on the graph.

ATTENTION

T

he capacity in the pressure drop diagram is based on a dry heat exchanger.

Comfort 252 / 302 Top (English) BY NILAN

21

Pressure drop diagram

dp

dp

3

1

2

4

1

2

3

4

4

2

3

1

0

20

40

60

80

100

120

140

160

0 50 100 150 200 250 300 350 400

dp [Pa]

qv [m3/h]

CT250 med Klingenburg GSK 378 mm

22

Software settings

User-panel

Functions

1

2

4

3

The CTS150 control panel provides the following functions:
1

. Setting fan speeds: 0 (off) - 1 - 2 - 3 - 4

2. Green diode: On when the unit is running

3. Setting low humidity: Can be set between 15 and 45%

4. Red diode: Flashes in the event of an alarm

Alarms

If the unit is in alarm mode, the RED diode on the CTS150 control panel will flash.

Alarm description

ID Alarm Critical Signal

1. T3 temperature sensor missing No

2. T4 temperature sensor missing No

3. T8 temperature sensor missing No

4. temperature sensor missing No

5. De-icing alarm No

6. Filter alarm No

• If the unit records more than 5 de-icing registrations within 24 hours, the de-icing alarm (ID = 5) is
t

riggered

• To re-activate the de-icing alarm, disconnect electricity and restart the unit

• The unit shuts down when a critical alarm is active

Reset alarm:

1. Turn the fan speed selector as follows: → 0 → 4 → 0

2. Turn the selector to the fan speed required

Comfort 252 / 302 Top (English)

BY NILAN

23

Settings

I

nstalling of PC programme

Connect the PC to the unit via the USB BF connection, for this a USB AB cable is needed. The PC
application can be downloaded via NilanNet in the menu item After Sales/Software.

• Install the latest software "Installer PC Tool"

• Install the programme under: C:\programmer(x86)HVAC\installer PC Tool\PC Tool\

Example of an installation in Windows 7 (deviations may occur within other versions of Windows).

1. Click O

PEN to open the .Zip file 2. Click RUN to install the programme

3. Click N

EXT to continue 4. Checkmark

the box

for installing USB driver and click NEXT

5. Click N

EXT to approve the location of the PC application 6. Click NEXT to approve the installation of the PC application

24

7. Click Y

ES to allow changes to your PC 8. The PC programme will be installed

9. Click C

LOSE to continue the installation 10. The USB driver will be transferred

11. Click N

EXT 12. Click INSTALL to install the USB driver

13. The USB driver will be installed 14. Click F

INISH to finish

Comfort 252 / 302 Top (English)

BY NILAN

25

PC-setting tool

ID1 ID1

ID4 ID5

ID9

ID5ID8ID7

ID7

ID3

ID6

ID2

T3 T8

T4

RH

Explanation of symbols:

•

T3: Temperature sensor extract air

• T4: Temperature sensor in the heat exchanger extract air

• T8: Temperature sensor in outdoor air intake

• RH: Humidity sensor in extract air

• Inlet Fan: Inlet air

• Exhaust Fan: Extract air fan

26

List of adjustable parameters

ID Description Interval Default settings

1 Fan settings

Fan level 0 is not adjustable

Fan level 1 in/out (humidity low) [0 - 100] 23 / 25 %

Fan level 2 in/out (basic ventilation) [0 - 100] 40 / 45 %

Fan level 3 in/out (high humidity) [0 - 100] 65 / 70 %

Fan level 4 in/out (user selection/cooker hood) [0 - 100] 100 / 100 %

2 Setting the filter change period [1 - 360] 90 days

3

Setting the low ventilation step (step 1) at low outside
t

emperatures (with preheating mounted, recommended setting

-3)

[-3 - 0 - N/A] 0 °C

The actual outdoor temperature can be read (T8)

4 Setting of the wanted indoor temperature [0 - 50] 22 °C

The actual indoor temperature can be read (T3)

5 Setting of fan level at low humidity [off, 1, 2, 3] 1 level

Setting of fan level at high humidity [off, 2, 3, 4] 3 level

The actual humidity (RH)

6 Bypass damper position (Open/closed)

7 Setting the defrosting process

Start T: Setting the temperature (T4) where de-icing can start [1 - 5] 3 °C

Start time: Setting how long time to wait before de-icing starts [1 - 10] 5 min

Stop T: Setting the temperature (T4) at which the de-icing must
s

top

[2 - 12] 7 °C

Maximal time: Setting the maximum de-icing period [5 - 60] 30 min

Delay time: Setting of the minimum period between two de-icing
c

ycles

[15 - 760] 300 min

Bypass state: Setting whether bypass is open or closed during
d

e-icing

[Closed, Open] Closed

The actual temperature in the heat exchanger air output can be
r

ead (T4)

8 Setting of summer-/winter switch

Switch: Setting the outside temperature where there must be a
s

hift between summer-/winter switch

[5 - 30] 13 °C

Dead-band: Regulation dead-band for summer/winter switch [0 - 10] 1 °C

9 Save or load settings

Save configuration: Save the current settings

Load configuration: Upload your last saved settings

• Summer/winter operation mode changes if outdoor temperature is the set value plus the dead-band
s

etting in more than 15 minutes

• De-icing is only possible, if the outdoor temperature (T8) < 1 °C

• It is only possible to run low humidity when the unit is in winter mode

Comfort 252 / 302 Top (English) BY NILAN

27

Operation

B

ypass function

When the current room temperature is above the desired temperature, there is no further need for
heat recovery. In this situation, the bypass opens and diverts the outdoor air round the heat
exchanger, preventing the latter from being heated by the indoor air. This results in lower internal
pressure in the unit, thereby saving energy on fan operation.

The unit has a 100% bypass, which means that as well as diversion of the outdoor air round the heat

exchanger, a damper closes off the heat exchanger, preventing any outdoor air from passing through
it.

Humidity control

As standard, the unit is fitted with intelligent humidity control, which automatically adjusts to the
needs of the family or building.

By means of the integral humidity sensor, the control system calculates the average value for the past

24 hours. The average value is consulted when deciding whether to change the air change rate in the
event of a fluctuation in the air humidity in the extract air, and at the same time it adjusts to the air
humidity levels in summer and winter.

If the air humidity rises by more than 5-10% (summer/winter), forced ventilation is activated in order

to expel the humidity as quickly as possible. If the average air humidity falls below the set value for low

humidity (default value 30%), the unit will operate at a reduced level with a lower air change rate, in

order not to dry out the home even further.

This automatic humidity control helps to save energy on operation, and to ensure satisfactory comfort

in the home.

28

Replacing the filter

CAUTION

A

lways turn off the unit before replacing filters.

It is important to replace the filtes in the unit regularly, as clogged filters provides greater
power consumption and reduces the ventilation.

As a standard the unit is equipped with 2 pc. of G4 filters, which will protect the fans and heat
exchanger. The G4 filter should generally be replaced every 3 months and therefore the filter
alarm factory setting i set to 90 days. After 90 days there will be an alarm in the control panel,
as an indication to change filters.

It is possible to buy a F7 pollen filter for placement in the outdoor air intake.

Comfort 252 / 302 Top (English)

BY NILAN

29

30

Comfort 252 / 302 Top (English)

BY NILAN

31

Nilan A/S
Nilanvej 2
DK-8722 Hedensted

Tlf. [phone]
Fax [phone]

[e-mail]
www.nilan.dk

United Kingdom:

S L Services
25 St Leonards Road, Horsham
RH13 6EH West Sussex

Tlf. [phone]

[e-mail]
www.nilanuk.com

Ireland:

Nilan Ireland
Ballylahive, Abbeydorney

Tlf. [phone]

[e-mail]
www.nilanireland.ie

Document no.B11_Comfort_252-302-Top_GB

Nilan A/S assumes no responsibility for any errors or omissions in the printed manuals or for loss or damage that may follow from the use of such published materials - whether such loss of

damage is caused by errors or inexpediencies in the material or otherwise. Nilan A/S reserves the right without prior notice to change products and manuals. All trademarks are the property

of Nilan A/S. All rights reserved.