Zehnder Rittling Svea eAir Manual

Operating and maintenance instructions for the ventilation unit
Svea eAir

2
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English

3Operating and maintenance instructions for the ventilation unit
READ FIRST ................................................................................................................ 4
INTENDED USE ............................................................................................................ 4
SAFETY .................................................................................................................... 5
General information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Electrical safety ........................................................................................................ 5
TYPE PLATE ................................................................................................................ 5
USING THE VENTILATION UNIT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
General instructions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Daily usage of the ventilation unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
I want the ventilation to follow my schedule automatically . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
How can I save money and energy, and advance the healthiness of my living environment? 10
What other properties does the ventilation unit have?. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
What to do if ventilation is not working as I want? . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
MAINTENANCE ...........................................................................................................16
Maintenance notication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Filters .................................................................................................................16
Fans ..................................................................................................................18
Heat exchanger .......................................................................................................18
Adding water to water lock (removal of condensation water). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Troubleshooting..........................................................................................................21
PRODUCT INFORMATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
ENERGY CLASS...........................................................................................................26
CONTENTS

4
This instruction manual is intended for all the users of the
Enervent ventilation units. Only qualied professionals
may install the equipment described in this manual in
accordance with the manufacturer’s instructions and the
local laws and regulations. If the instructions provided
in this manual are not followed, the warranty for the
equipment becomes void and damages may be caused
to persons or property.
The equipment described in this manual may not be
used by persons (including children) with reduced
physical, sensory or mental capacity or without sucient
experience or knowledge, unless a person responsible for
their safety is supervising and advising them in the use of
the equipment.
The intended use of the unit is the improvement of indoor
air quality, and its primary function is ventilation.
The unit is also used for the recovery of heat energy
from the extract air. Depending on the model and the
accessories, the unit can also be used for cooling the
supply air in the summer. Moreover, the unit can also be
used for controlling the humidity and carbon dioxide
levels of indoor air.
READ FIRST INTENDED USE

5Operating and maintenance instructions for the ventilation unit
SAFETY
General information
Electrical safety
Always check that the supply voltage to the
equipment is switched o before opening the
service hatch.
Only an authorised electrician may open the
electrical box.
In case of a malfunction, always determine the
reason for the malfunction before restarting the
unit.
When you have switched o the power to the
unit, wait for two (2) minutes before starting the
maintenance work. Even though the power is
switched o, the fans continue running and the
post-heating coil remains hot for a while.
DANGER
DANGER
WARNING
WARNING
If you need technical support, please check the
equipment type and serial number from the type plate.
TYPE PLATE
IP 20
Type label
1234567890
Ventilation unit
TYPE:
W/ V/ HZ/ A: 1141/230,1~/50/6.1
www.enervent.com

6
USING THE VENTILATION UNIT
Once the ventilation system is carefully designed and
installed, any user actions are hardly required. The user
can relax and enjoy good ventilation.
General instructions
• Ventilation must be sucient.
If ventilation is not sucient, the indoor air humidity may
rise, which can cause condensation on cold surfaces.
• The indoor air humidity levels must be checked at
regular intervals.
During winter an indoor relative humidity level of no
more than 40-45% is recommended (room temperature
20-22°C). The relative humidity level can be checked from
the ventilation unit measurements. If the relative humidity
level rises over 45%, ventilation should be boosted.
• The cleanliness of lters must be checked regularly.
Often in wintertime, the extract air lter collects more
dirt than the supply air lter. This means that the extract
air ow is reduced, which can lead to a rise in indoor air
relative humidity, and reduced heat recovery eciency.
More information about cleaning and changing the lters
can be found in the Maintenance section.
• Check monthly that the heat exchanger is
functioning correctly, i.e. rotating.
• More information about checking and cleaning the
heat exchanger can be found in the Maintenance
section.
If you encounter issues with using the ventilation
unit, check for answers in the Troubleshooting
table at the end of this manual.
Always keep the control panel in the wall mount.
Do not switch o the ventilation unless for service
or when instructed so by the authorities. The
ventilation must always be kept in operation at
the power level set at the commissioning.
FOR INFORMATION
FOR INFORMATION
FOR INFORMATION
Do not try to set the system settings by yourself!
Installing a ventilation system is a job for a trained
installer.
Do not damage the control panel screen with a
sharp or scratching object.
WARNING
WARNING
• If the ventilation unit is shut down for a longer time
than a couple of hours during winter, the fresh air
intake vent and exhaust air blowout vent must be
covered airtight.
This prevents humidity from condensing on the electric
motors of the fans, for example.
• In the autumn, before the beginning of the heating
season and in the spring before the beginning of the
cooling season (if the unit has a cooling function),
the condensation water drain must be checked by
pouring water in the condensation water drain and
making sure that the water drains away.
This instruction is for the users of the Enervent ventilation
unit and control panel.
Be patient! The control panel takes some time to react.

7Operating and maintenance instructions for the ventilation unit
Some control panel functions are meant only
for installation or maintenance use. Because
these functions are not usually needed, they are
password-protected.
FOR INFORMATION
What is the ventilation unit used for?
The unit is meant to improve the indoor air quality, mainly
by ventilating.
The unit also recovers heat from the extract air. Some
models can be used for cooling supply air during summer.
The indoor humidity and carbon dioxide levels can be
controlled with the unit.
How does the ventilation unit work?
Functioning ventilation is the basis for living comfortably.
In mechanical ventilation, fresh air is blown into the
house, and used air is blown out. The purpose of
ventilation is to bring in clean, ltered air for people and
pets to breathe, and to extract impurities from indoor air.
A rotating heat exchanger recovers heat energy from
the extract air. The heat in the extract air warms up the
aluminium vanes in the heat exchanger, which in turn
releases the heat energy into the supply air when rotating,
with an eciency of over 80%.
How is the ventilation unit used?
When ventilation is carefully designed and installed, you
do not have to do anything. Sit comfortably and enjoy the
fresh air.
How do I begin to use the unit?
The ventilation system should be installed and ready for
use.
Tap the control pane screen. Its keylock might be on.
Open the lock by pressing the lock button for a few
seconds.
The main page of the control panel should open:
The main page of the control panel
The circle around the operating mode button changes
its color depending on what the ventilation unit is doing.
The circle is green, when heat recovery is active. The circle
is orange and red when heating is active, and blue when
cooling is active.
If the text Select language displays on the screen instead,
the system has not been installed yet. In this case do
not continue using the panel. Contact the installing
technician instead.
If nothing happens when
you tap the screen, the
control panel battery may
have run out, or the
ventilation unit is
switched o. Switch on
the ventilation unit, or
charge the battery by
putting the panel in the
wall mount, or connect
a mobile charger (µUSB
connector).

8
Do not switch o the ventilation unless for service
or when instructed so by the authorities.
Daily usage of the ventilation
unit
Ventilation is controlled with a simple and easy to
use touch screen, that has functions based on actual
operating conditions. The modes available in the
panel cover all your home ventilation needs. Selecting
a function changes the ventilation unit operations
accordingly. The installing technician congures all the
mode parameters in accordence to the ventilation plan
when the ventilation unit is commissioned.
Operating modes of the unit
• At home (when at home)
• Away (when not at home)
• Overpressure (when lighting a replace)
• Boosting (when additional ventilation is needed)
• Silent* (when ventilation needs to be as silent as
possible)
• Max. heating / Max. cooling
* To be activated separately
When at home
When at home, the ventilation mode should be At home.
Check that the central circle on the control panel main
page has the status “At home”. If it is not so, change it by
doing the following:
1. Tap the green circle in the
middle of the main page of the
control panel.
Choose operating mode window
opens.
2. Tap the At home icon.
Ventilation system is adapting to
new conditions.
When away
If you are going on a trip, for
example, or spending time
away from the building, you
can congure the ventilation
accordingly.
1. Tap the green circle in the
middle of the main page of the
control panel.
Choose operating mode window
opens.
2. Tap the Away icon.
The ventilation system adapts to using less energy when
you are away.
This function can be timed to switch on when you are not
usually at home, e.g. during working hours.
In the section I want the ventilation system to
automatically follow my schedule there are more
information about conguring the ventilation system.
If the ventilation unit is used in business premises
or in a public space, its operating mode might be
Oce. When the ventilation is operating normally,
the center circle of the control panel main page
displays the At oce symbol.
FOR INFORMATION
WARNING

9Operating and maintenance instructions for the ventilation unit
When you want to boost
ventilation temporarily
If you have invited guests, the
ventilation designed for your
normal living situation may
not be enough. This function is
especially important in houses
with a sauna, because the
heat and humidity produced
by saunas must be ventilated
eciently.
When more powerful ventilation is temporarily needed:
1. Tap the green circle in the middle of the main page
of the control panel.
Choose operating mode window opens.
2. Tap the Boost icon.
Ventilation is boosted.
The ventilation system returns to normal mode in 30 minutes.
When you want to light the replace
You may need the overpressure
function when lighting the
replace.
To activate the Overpressure mode:
1. Tap the green circle in the
middle of the main page of the
control panel.
Choose operating mode window
opens.
2. Tap the Overpressure icon.
The ventilation system adapts to function so that lighting
the replace is easy.
The ventilation system returns to normal mode after ten
minutes.
When you want to silence the ventilation
temporarily
If you need a moment of silence, e.g. when going to sleep
or putting the children to bed, you can switch on the
Silent mode.
You must activate the Silent mode before it can be used
for the rst time.
Activating Silent mode
1. Tap the upward arrow on the
main page of the control panel.
Main menu window opens.
2. Tap Settings.
The Settings menu opens.
3. Tap Usage modes.
The Usage modes menu opens.
4. Tap Silent mode settings.
Activate the Silent mode by
tapping Inactive.
“Inactive” is replaced with “Active”,
and the mode is activated.
5. You can change the duration of Silent mode, if you
want to.
Default value is 60 minutes.
The settings are saved automatically.
Silencing the ventilation temporarily
1. Tap the green circle in the middle of the main page
of the control panel.
Choose operating mode window opens.
Tap the Silent icon.
2. When Silent mode is in use, the CO2, %RH, and
maximum heating boost are reduced so that the
ventilation system will operate as quietly as possible.
The ventilation system returns to normal mode in 60
minutes or after a period set by you. Conguration is done
in the Silent mode settings menu.
Using the Silent mode is limited. The mode can be
activated only twice a day.
Overpressure mode is only meant for making
lighting the replace easier, not for supplying
actual combustion air for the re.
Use the overpressure function sparingly. Using the
function unneccessary wastes lots of energy.
WARNING
TIP

10
I want the ventilation to follow
my schedule automatically
If your life has a regular rhythm, you can make things
easier by conguring some of the ventilation functions
to activate automatically at certain times. The following
functions can be timed:
Function Description
Away Ventilation unit can be congured to operate
in Away mode by using a time program, for
example during working days when nobody
is at home.
Heating
prevented
Heating is prevented at certain time. This
mode is practical in the summer, for example,
when sudden changes in temperature
can activate heating even though it is not
needed.
Cooling
prevented
Cooling is prevented at certain time. This
function is useful in the spring, for example,
when sudden changes in temperature can
trigger cooling even though is not needed.
Temperature
drop
Ventilation is functioning at a normal level,
but allows the indoor temperature to drop.
Time relay Sets time relay (DO7) to activate at a certain
time. The function can only be used if
the installer has made the neccessary
connections for the desired function.
Boost The ventilation unit will boost ventilation
during the time dened in the time program.
To schedule functions:
1. Tap the upward arrow on the main page of the
control panel.
Main menu window opens.
2. Tap the Time programs icon. You can choose from
weekly and annually run programs.
3. Tap New weekly program or New annual program.
4. Tap Not selected to display a list of programmable
functions.
5. Tap the function you want.
The function setting window opens.
6. Set the start and end times for the function.
7. Tap the OK button.
A window listing the time programs displays, and the
time program you created is shown on the screen.
How can I save money and
energy, and advance the
healthiness of my living
environment?
Correctly designed and used ventilation saves money
and energy. Additionally, it promotes healthy living
environments and healthy inhabitants.
• Use the ventilation system according to the designed
plan throughout the year.
• Clean or change the lters at set intervals and vacuum
the inside of the unit regularly. Dust and other air
impurities can contaminate the unit. Dirt blocks the
lters and adheres to the heat exchanger, which
in turn weakens the eciency of ventilation. The
ventilation unit service door needs to be opened
regularly - once a month, for example - and the
condition of the unit must be checked.
• Use special modes like Silent and Overpressure only
when they are really needed. Unnecessary use of
special modes will show in your electric bill.
• Besides controlling the ventilation system, you
can add to your comfort by traditional means. For
example, closing curtains and windows on a hot
day, or dressing warm on cold days can save a lot of
energy.
• Use only Enervent-approved spare parts.
The ventilation system Eco mode saves energy and
money without compromising air quality.
The control panel main screen displays a time program reminder two hours before the program starts. When the
ventilation unit is operating under a time program, the panel main screen displays a clock symbol.
FOR INFORMATION

11Operating and maintenance instructions for the ventilation unit
When using Eco mode
The Eco mode minimizes the
electrical power usage of the
ventilation unit, and maximizes
heat recovery, without
compromising ventilation. The
Eco mode prevents additional
heating and cooling, as well as
maximizing the heat recovery.
The heat recovery is on
maximum eciency, except for
the hottest summer days.
Observe that the use of Eco mode may cause draft on
cold winter days.
When using Eco mode
1. Tap the leaf symbol on the upper right corner of the
control panel main page.
Eco mode is now activated, and the leaf icon turns green
to indicate this.
Should ventilation be reduced in winter in
order to save energy?
Do not reduce ventilation power or turn o ventilation
even when the outdoor temperature drops. Instead of
savings, it can cause additional expenses.
Your ventilation system is designed by a professional. The
changes in the outdoor temperature have been taken
into account when designing the system and ventilation
units. If you do not change your daily routines, there is no
reason to change the settings of the ventilation system.
If the airow is reduced during cold weather, ice can
accumulate in the ventilation unit. The risk grows in
extremely cold conditions, and when indoor air is very humid
(e.g. after using the shower and when drying laundry).
If you are suspecting that the ventilation system settings
need to be updated, contact the system designer.
What other properties does
the ventilation unit have?
Network interface
You can control your ventilation
unit over internet. Fot this the
ventilation unit motherboard
must be connected to internet.
The technician will tell you your
user ID (unit serial number) and
password once the installation
is done. Go to my.enervent.com
and log in with these credentials.
You can monitor and control your
ventilation unit over internet.
You can check you password from the eAir Web-settings
menu. Tap the arrow at the bottom of the control panel
main screen > eAir web Settings > Pin-code.
Measurements
You can check the temperature,
air humidity, heat recovery
eciency, and other values from
the Measurements menu.
To open the Measurements menu:
1. Tap the upward arrow on the main page of the
control panel.
Main menu window opens.
2. Tap the icon in the Measurements menu.
Open the submenu of the measurement you want.
3. A list of measurement results opens on the screen.
Tap the arrow at the end of the measurement, if
you want to check a graphical representation of the
measurement.
4. Graphical representations are available as daily or
weekly graphs.
Do not switch o the ventilation unless for service
or when instructed so by the authorities.
WARNING

12
Settings
Most submenus in the Settings
menu are read only menus.
Their function is to show which
settings have been selected for
your ventilation system.
You can make changes in the following menus, if
necessary:
Menu Description of change
Screen settings - Changing language, date, time,
brightness, and other screen properties.
Heat recovery
settings
- Heat recovery anti-freeze activation.
The technician has congured the rest of
the heat recovery anti-freezing settings.
Summer night
cooling
- Turning the summer night cooling on and
o.
- Setting the dates and times for summer
night cooling.
- Preventing or allowing active cooling.
Summer night cooling is an ecient way
to cool indoor air. Summer night cooling
activates at night and brings in cool
night air, which in turn lowers the indoor
temperature.
The installer has congured the other
summer night cooling settings.
Boost functions - Start and shutdown of humidity, carbon
dioxide, and temperature boost
Other values are not editable.
Menu Description of change
Usage mode
settings
- Setting the boost time in the Manual
boost settings.
- Setting the overpressure time in the
Manual overpressure settings.
- Activating and deactivating Silent mode.
- Setting the duration of the Silent mode
When the Silent mode is activated, the
mode symbol appears in the mode menu
on the main page (behind the green circle).
- Activating and de-activating the
Maximum heating/cooling mode in the
Maximum heating/cooling settings menu.
The technician has congured most Mode
settings when installing the unit.
Alarm settings - Changing the alarm or maintenance
notication for changing lters.
- Acknowledge the maintenance
notication for changing lters.
By setting the times and dates for alarms
in the Alarms menu, you can decide when
to receive B alarms. B alarms do not require
immediate action.
- Activating and de-activating the lter
guard.
If your unit has installed lter guards (very
rare in detached houses), you can activate
and de-activate them in the Alarms
settings menu.
Only trained ventilation technicians can change
the unit settings. Making changes requires a
password.
WARNING

13Operating and maintenance instructions for the ventilation unit
Oce usage mode
If the ventilation unit is used in
business premises or in a public
space, its operating mode is
possibly Oce.
Oce usage modes are:
• Oce (during normal working hours)
• Overtime (when people are present outside normal
working hours)
• Boosting (when additional ventilation is needed)
When the ventilation is operating in Oce mode, the
center circle on the control panel main page displays the
At oce symbol.
Oce mode means that the ventilation unit is often
programmed to function only when there are people at
the premises. Other times the center circle of the control
panel indicates “Stop”.
I want to work overtime (only Oce mode)
If you are working for longer than the ventilation is in
operation, you can switch on the Overtime mode.
To activate the Overtime mode:
1. Tap the green circle in the middle of the main page
of the control panel.
Choose operating mode window opens.
2. Tap the Overtime icon.
Ventilation is left on and ends only after the set time.
Default value is 2 hours.
What to do if ventilation is not
working as wanted?
Supply air is too warm
If the air owing from the ventilation is too warm:
1. Tap the minus symbol (-) on the main page of the
control panel.
The temperature reading on the panel changes, and
the ventilation system begins to adapt for the set
temperature.
The set temperature is shown in green on the screen.
The indicated temperature reading can be the set point
temperature for supply air, extract air or room temperature
depending on the settings.
The unit uses all available options for reaching the set
temperature. If your system is missing elements, such as a
cooling coil, it will not necessarily be able to reach the set
temperature.
Supply air is too cold
If the air owing from the ventilation is too cold:
1. Tap the plus symbol (+) on the main page of the
control panel.
The temperature reading on the panel changes, and
the ventilation system begins to adapt for the set
temperature.
The set temperature is shown in green on the screen.
The indicated temperature reading can be the set point
temperature for supply air, extract air or room temperature
depending on the settings.
The unit uses all available options for reaching the set
temperature. If your system is missing elements, such as
a heater, it will not necessarily be able to reach the set
temperature.
The use of Eco mode may prevent the ventilation
unit from reaching the set temperature
FOR INFORMATION

14
Ventilation is too weak
If ventilation is not ecient enough, check that:
• the lters are clean and do not need to be changed.
If the lters are dirty, change them as described in the
instructions in the chapter Changing lters.
• ventilation needs have not changed signicantly after
designing and installing the system. For example, if
the number of people using the building or your daily
routines have changed, your ventilation system may
require an update. Contact the system designer.
Ventilation is too noisy
Although our ventilation units are fairly quiet, it is
impossible to make them completely silent. A well-
planned and built system, where the units are not near
the bedrooms, and where sound-proofed doors and
silencers are used, reduces the disturbance caused by
ventilation.
If the ventilation system is noisier than usual, check that:
• the lters are clean and do not need to be changed.
If the lters are dirty, change them as described in the
instructions in the chapter Changing lters.
• the fans are clean and do not need to be cleaned.
If they are dirty, clean them as described in the
instructions in the chapter Cleaning the fans.
• automatic humidity boosting is not in operation. If
the ventilation boost is constantly on*, it can be a sign
of too high indoor air humidity. Contact the system
designer.
If ventilation needs to be silenced only temporarily, you
can activate the Silent mode by tapping the green circle
on the main page of the control panel and choosing
Silent mode. The ventilation unit automatically reverts to
normal operation after a time period congured in the
settings.
* You can check this from the system information menu.
Control panel is not working
If controlling the ventilation unit with the control panel is
not working, check that:
• the control panel battery is not run out. If the battery
is empty, recharge it by placing the control panel in
the wall mount, or connect it to a mobile charger
(µUSB connector), If the battery is faulty, it must be
removed. The control panel will function without a
battery in its wall mount.
• If the control panel is showing "connecting to
network"-icon, check that the ventilation unit is on
and operating. A new pairing connection between
control panel and wall holder can be made by
following the instructions in the Installation manual
on page 12, or Youtube.com, search word: eAir
pariliitos.
Air is too humid
Besides your own observations, you can notice high
humidity by checking the control panel and listening to
the sound level of the ventilation system. If the automatic
humidity boost is constantly* on, it can be a sign that the
indoor air is too humid and the ventilation system is trying
to x the issue. If the indoor air is too humid, check that:
• the lters are clean and do not need to be changed.
If the lters are dirty, change them as described in the
instructions in the chapter Changing lters.
• ventilation needs have not changed signicantly after
designing and installing the system. For example,
if the number of people using the building and/
or the use of sauna and showers has changed, your
ventilation system may require an update. Contact the
system designer.
* You can check this from the system information menu.
Ventilation is not on
If ventilation is not working, check that:
• the service door upper latching screw is locked.
• the unit power cable is plugged in
• the power outlet has power
• the fuse in the fusebox is ok
• there is no alarm shown on the control panel
If the problem is not any of the above, and the ventilation
is not working, contact a maintenance company.

15Operating and maintenance instructions for the ventilation unit
The control panel is showing an alarm –
what must be done?
If the control panel is alarming, it is shown in yellow on
the main page, reading Alarm is active.
If you notice that the ventilation system has sent an alarm:
1. On the control panel main page you can
- tap the alarm notication text or
- tap the arrow at the bottom of the screen and then
tap the Alarms icon.
2. Alarms menu opens and the new alarm is shown rst
in the list.
At rst glance you can see:
- which alarm was sent
- when the alarm was sent
If you need more information, tap the alarm row and
an instruction will display on the screen. Tapping
the active alarm row also displays the Acknowledge
button.
3. Check the Troubleshooting table at the end of this
document to see if the issue can be solved. If it is a
more dicult problem, contact the installer.
Do not acknowledge the alarm before you have
solved the issue causing the alarm.
WARNING

16
The ventilation unit contains moving parts (e.g. fans,
motor and belt of the rotating heat exchanger) that wear
out during use. Because of normal wear, these parts will
have to be changed during the ventilation unit´s lifetime.
The normal lifetime of wear parts is dependant of the
operating conditions and periods, which means that a
normal maintenance period cannot be dened for the
wear parts.
Maintenance notication
The control panel reminds you about regular
maintenance.
Filters
MAINTENANCE
The ventilation unit uses cartridge lters ISO ePM1 (F7) for
supply and ISOePM10 (M5) for extract.
The recommended maximum maintenance period for
cartridge lters is 6 months.
The unit does not need much maintenance. Sucient
maintenance usually covers the following tasks:
• changing lters
• cleaning the heat exchanger (when sweeping the
ventilation ductwork)
• cleaning the fans (when sweeping the ventilation
ductwork)
• checking condensation water drain.
supply
lter ISO
ePM1(F7)
extract lter
ISO ePM10(M5)
Before starting maintenance, switch o the power
by removing the plug from the socket. Wait
approximately two (2) minutes before starting
maintenance. Although power has been shut
down, the fans will rotate and the electric heater
will be hot for a while.
DANGER
When some part of the unit is serviced, check also
if other parts are worn or needs to be cleaned.
For more information on maintenance actions, see
a video in the Help Center on our website at www.
enervent.com.
FOR INFORMATION
To acknowledge the maintenance remainder,
go to: > Main menu > Settings > Alarm >
Acknowledge service reminder > ok
FOR INFORMATION

17Operating and maintenance instructions for the ventilation unit
Changing lters
2
3 4
1
ISO ePM1 (F7) ISO ePM10 (M5)

18
Fans
Inspecting
Before opening the service hatch, always make
sure that the unit’s supply voltage is switched o.
DANGER
1. Inspect the condition of the fans visually when
changing the lters.
• If they look dirty, clean them.
Vacuum the inside of the unit for better
performance and cleaner indoor air.
TIP
Cleaning
Before opening the service hatch, always make
sure that the unit’s supply voltage is switched o.
DANGER
1. Remove the fans from the unit.
2. Clean the fans with a toothbrush or pressurized air.
Be careful not to disturb the balancing weights on
the fanwheel
3. Place the fans back into the unit.
Make sure the heat recovery wheel and fans rotate when
starting the unit after cleaning.
Heat exchanger
Inspecting
Before opening the service hatch, always make
sure that the unit’s supply voltage is switched o.
DANGER
1. Check the condition of the heat exchanger visually
when changing the lters.
• If it looks dirty, clean it.
Vacuum the inside of the unit for better
performance and cleaner indoor air.
TIP
Cleaning
1. Remove the heat exchanger from the unit.
2. Wash the heat exchanger with water and neutral
detergent or use pressurized air.
Do not submerge the heat exchanger in water. The
electric motor inside the exchanger must not get
wet.
The use of a pressure washer is strictly forbidden.
WARNING
3. Dry the heat exchanger carefully.
4. Place the heat exchanger back into the unit.
5. Start up the unit to verify the rotation.
6. Close the service hatch.
Make sure the heat recovery wheel and fans rotate when
starting the unit after cleaning.

19Operating and maintenance instructions for the ventilation unit
If the heat exchanger has stopped rotating, the reason
for it may be a broken drive belt. Check the condition of
the belt from the round opening at the front of the heat
exchanger.
Replacing heat exchanger belt
Visit the HelpCenter on our webpage www.enervent.
com for videos showing the maintenance tasks.
TIP
To replace:
Turn o the ventilation unit by switching o the
main power supply, by removing the fuse or by
disconnecting the wall plug.
DANGER
1. Detach the bayonet connector from the socket.
2. Remove the heat exchanger from the unit carefully.
3. Unscrew the six screws on the heat exchanger
maintenance hatch lid at the front side of the heat
exchanger.
6. Inspect the belt wheel to make sure it is undamaged,
in its place and rotating properly.
7. Clean the heat exchanger and the belt wheel.
• Use degreaser with a soft, lint-free cloth.
• Rotate the heat exchanger to make sure everything
gets cleaned.
• Make sure that the heat exchanger is rotating freely,
without excessive force. You should be able to rotate
the heat exchanger with only one nger.
4. Open the maintenance hatch with the help of a at
tool.
• Use for example a Stanley knife.
5. Pull o the broken heat exchanger belt.
8. Loosen the U-beam on one side of the heat
exchanger by removing the screws under the
U-beam rubber gasket.
9. Unscrew the hexagonal screw of the shaft in the
middle of the U-beam and remove the beam.

20
10. Slide the new belt inside around the heat exchanger
through the opening in the casing and the gasket.
11. Rotate the heat exchanger to get the belt properly in
place.
12. Replace the U-beam and reattach the shaft and the
U-beam screws.
13. Clean the new belt with the cleaning cloth to make
sure it is free of dirt and any grease.
14. Pull the belt onto the belt wheel.
15. Rotate the heat exchanger and ensure that the belt is
in its place and everything looks ne.
16. Vacuum clean the heat exchanger casing.
• Rotate the heat exchanger when you are vacuuming
to be sure to clean everywhere.
17. Close the maintenance hatch.
18. Add some silicone lubricant onto the rubber strips
outside the heat exchanger casing.
19. Place the heat exchanger back into the unit.
20. Reconnect the bayonet connector to the socket.
21. Reconnect the power.
22. Make sure the heat exchanger rotates.
Adding water to the water trap
(draining the condensation
water)
FOR YOUR INFORMATION
If the
K900010010
water trap is
used, no water
needs to be
added.