Zehnder Rittling ComfoAir 160 User manual

Ventilation system
ComfoAir Basic
User manual
■Decorative radiators ■Comfortable indoor ventilation ■Heating and cooling ceiling systems ■Clean air solutions
ComfoAir 160 ComfoAir 200
ComfoAir Standard 300
ComfoAir Standard 375
ComfoAir 350

EN - 2
All rights reserved.
This documentation has been compiled with the utmost care. The publisher cannot be held liable for any damage
caused as a result of missing or incorrect information in this document. In case of disputes the English version of
these instructions will be binding.
Foreword
Read this document carefully before use.
This document provides all the information
required for safe and optimal operation and
maintenance of the ComfoAir 160, 200, 350 and
ComfoAir Standard 300, 375. In this document it
will be referred to as “the unit”. The unit is subject
to continuous development and improvement.
As a result, the unit may slightly differ from the
descriptions.
The following pictograms are used in this
document:
Symbol Bedeutung
Point of attention.
Risk of compromised performance or
damage to the ventilation system.
Risk of personal injury.
CHANGED
SAME
Questions
Please contact the supplier if you have any questions
or would like to order a new document or new filters.
The contact details of the main supplier can be
found on the rear flap of this document.
The following information can be found in this
document:
Information Chapter
General information about the ventilation
system.
1
Safety instructions which must be followed. 1
Operating devices available for the unit. 2
The meaning of the information displayed
on the display of the unit.
2
Using the display to set different
parameters (P-menus).
2
A summary of all the different parameters
(P-menus).
2
Warranty and liability conditions. 3
What to do with the unit at the end of its
life.
3
EEC declaration of conformity. 3
How to replace the filters of the unit. 4
How to clean the valves of the ventilation
system.
4
When the installer or maintenance
mechanic must come by for the
maintenance of the unit.
4
What to do in event of an malfunction. 5

3 - EN
Table of Contents
Foreword...................................................................................................................................................................... 2
1 Introduction and safety..................................................................................................................................................4
2 Operation.....................................................................................................................................................................6
2.1 Available operating devices ....................................................................................................................................6
2.2 Reading the display on the unit............................................................................................................................... 7
2.3 Reading and setting the comfort temperature .........................................................................................................8
2.4 Switching the supply fan on and off .......................................................................................................................9
2.5 Setting a overrun timer for the RFZ..........................................................................................................................9
2.6 Setting an overrun timer for the SA 1-3V, SA 0-3V or SAI Flash ............................................................................... 10
2.7 Setting an overrun timer for the second SA 1-3V, SA 0-3V or SAI Flash (bathroom switch) ........................................ 10
2.8 Setting a delay timer for the second SA 1-3V, SA 0-3V or SAI Flash (bathroom switch) ............................................. 11
2.9 Setting the delay timer for the filter alert................................................................................................................. 11
2.10 P menus for the user ........................................................................................................................................... 12
3 CE certification and warranty ....................................................................................................................................... 13
4 Maintenance .............................................................................................................................................................. 14
4.1 Cleaning or replacing the filters............................................................................................................................. 14
4.1.1 Replacing the internal filters .......................................................................................................................... 15
4.1.2Cleaning the internal filters ........................................................................................................................... 16
4.2 Cleaning the valve ............................................................................................................................................... 16
4.3 Condensation drain ............................................................................................................................................. 16
4.4 Maintenance by the installer or maintenance mechanic .......................................................................................... 16
5 Malfunctions............................................................................................................................................................... 16
I Installation/test report ................................................................................................................................................. 17
II Maintenance log ......................................................................................................................................................... 18

EN - 4
1 Introduction and safety
The unit is a balanced ventilation system with heat
recovery in order to create energy-efficient ventilation
in houses. Balanced ventilation means that pollutants
from the kitchen, the bathroom, the toilet(s) and
possibly the storage room are extracted, while the
same amount of fresh air is blown into the living room
and bedrooms. Gaps under or near the doors ensure
a good through-flow in the dwelling.
Ensure that the gaps under or near the door are
never obstructed. For example by furniture,
draught excluders or deep-pile carpet.
A balanced ventilation system consists of:
The unit (A);
Duct system for the supply of outdoor air (B);
Duct system for the exhaust of indoor air (C);
Supply valves in the living room and bedrooms (D);
Exhaust valves in the kitchen, bathroom, the toilet
and (if present) the storage room (E).
A
DD
E
E
E
D
B
C

5 - EN
Safety instructions
Always follow the safety regulations,
warnings, comments and instructions
given in this document. Personal
injury or damage to the unit can arise
from non-compliance with the safety
regulations, warnings, comments and
instructions in this document.
■It is recommended to take out a
maintenance contract so that the
device is checked on a regular basis.
The supplier can provide a list of
registered installers nearby;
■The unit may only be installed,
connected, rendered operational
and maintained by an appropriately
approved installer, unless otherwise
indicated in this document;
■Store the document for the entire
working life of the unit;
■Instructions with regard to cleaning or
replacing the filters must be carefully
observed;
■When carrying out any work on
the unit, make sure the power
is disconnected and cannot be
inadvertently reconnected;
■The unit cannot be opened without
using tools.
Use of the unit
■The unit may only be used once it has
been properly installed according to
the instructions and guidelines given
in the installer manual of the unit;
■Do not open the casing. The installer
makes sure that all components that
can cause personal injury are safely
located behind the casing;
■The unit can be used by children
aged from 8 years and above and
persons with reduced physical,
sensory or mental capabilities or
lack of experience and knowledge
if they have been given supervision
or instruction concerning use of the
unit in a safe way and understand the
hazards involved.
■Children must not play with the unit;
■Children must not clean and maintain
the unit unsupervised.

EN - 6
2 Operation
How to use and read the operating devices of the unit is mentioned in the document of the operating device.
How to use and read the display on the unit is mentioned in this document.
2.1 Available operating devices
One or more of the following operating devices can be present to operate the unit:
Appearance Name Functions
Display on unit Indicating the set ventilation level;
Indicating a malfunction or filter alert;
Indicating if the bypass is open;
Turning the supply fan on and off;
Indicating and setting the comfort temperature;
Setting the P-menus;
Resetting the malfunctions and filter alert.
The desired ventilation level cannot be set with the
display on the unit.
SA 1-3V Set the desired ventilation level:
■1 = Low;
■ 2 = Normal;
■ 3 = High;
■ Overrun timer.
SA 0-3V Set the desired ventilation level:
■0 = Off;
■1 = Low;
■ 2 = Normal;
■ 3 = High;
■ Overrun timer.
SAI Flash Set the desired ventilation level:
■ 1 = Low;
■ 2 = Normal;
■ 3 = High;
■ Overrun timer.
Indicating a malfunction or filter alert.
Bathroom switch Activating the overrun timer.
RFZ Set the desired ventilation level:
■0 = Off;
■1 = Low;
■ 2 = Normal;
■ 3 = High;
■ = Overrun timer.
Indicating a malfunction or filter alert.
ComfoSense Indicating and setting the desired ventilation level:
■ = Absent
■ = Low;
■ = Normal;
■ = High;
■ PARTY TIMER = Overrun timer;
■ AUTO = Preset programme.
Indicating a malfunction or filter alert;
Indicating if the bypass, pre heater, ComfoFond-L, preset
programme, analogue programme or overrun timer is activated;
Turning the supply and/or exhaust fan on and off;
Indicating and setting the comfort temperature;
Setting the P-menus;
Resetting the malfunctions and filter alert;
Setting a preset ventilation programme;
Setting and showing date and time.

7 - EN
2.2 Reading the display on the unit
Appearance Description What to do
All lights are off.
The power of the unit is turned off.
Turn on the power of the unit.
One number is displayed in the middle of the display.
The current ventilation setting is displayed.
Possible displayed settings are:
■ 1 = Low;
■ 2 = Normal;
■ 3 = High.
No action required.
The letter “A” is displayed in the middle of the display.
The current ventilation setting is displayed.
The displayed setting is “Absent”.
No action required.
The letter “t” is displayed at the left of the display (with one
number in the middle of the display).
An overrun timer is activated (and the current ventilation
setting is displayed).
No action required.
A point is displayed next to the middle of the display (with one
number in the middle of the display).
The bypass is opened (and the current ventilation setting is
displayed).
No action required.
The letters “FiL” and “tEr” are alternately flashing on the
display.
The “internal filter malfunction“ is displayed..
Clean or replace the filters as
mentioned in the "Maintenance"
chapter.
The letter “A” is flashing at the left of the display with one or
two numbers on the right of the display.
The current “malfunction code“ is displayed.
Contact the installer or
maintenance mechanic as
mentioned in the "Malfunctions"
chapter.
The letter “E” is flashing at the left of the display with one
number on the right of the display.
The current “malfunction code“ is displayed.
Contact the installer or
maintenance mechanic as
mentioned in the "Malfunctions"
chapter.
The letters “EA” are flashing at the left of the display with one
number on the right of the display.
The current “malfunction code“ is displayed.
Contact the installer or
maintenance mechanic as
mentioned in the "Malfunctions"
chapter.
The letter “P” is displayed at the left of the display with one or
two numbers on the right of the display.
The current chosen “P-menu” is displayed.
No action required.
At this time the lower
buttons of the display are
not functional.
One, Two or Three numbers are displayed in the right of the
display.
The current setting of the chosen “P-menu” is displayed.
No action required.
At this time the lower
buttons of the display are
not functional.

EN - 8
Appearance Description What to do
Three numbers with a point after the second number are
displayed in the display.
The current setting of the comfort temperature is displayed.
No action required.
The light above the icon with one arrow is lit.
The supply fan is turned off.
There is no supply of fresh air.
Do not forget to turn on the
supply fan again when the supply
fan has been turned off manually.
The light above the icon with two arrows is lit.
The supply fan is turned on.
There is balanced ventilation.
No action required.
2.3 Reading and setting the comfort
temperature
The unit will strive for the most comfortable
supply air temperature based on the set comfort
temperature.
It is best to set the comfort temperature to the
same temperature as the room thermostat (of the
central heating system).
The comfort temperature can be set between
12°C and 28°C. How to read or set the comfort
temperature on the present operating device can be
found in the document of the operating device.
Action on
display
Reaction on
display***
Explanation
1Press and hold
for at
least 3 seconds
Current set comfort
temperature is being
displayed.
2Press Comfort temperature
is increased by 0.5°C.
Or press Comfort temperature
is decreased by 0.5°C.
3Press Comfort temperature
is confirmed and the
display returns to the
default screen.

9 - EN
2.4 Switching the supply fan on and off
When required, the supply fan of the unit can be
turned off manually. This may be desired to keep
out unpleasant odors from outside. Bear in mind
that switching off the supply or exhaust fan will
temporarily immobilize your dwelling’s balanced
ventilation system, so do not forget to turn the
supply fan on again. How to switch the supply fan on
or off on the present operating device can be found
in the document of the operating device.
When can the supply fan not be turned off on the
display?
To prevent air being sucked back from the chimney
of a fireplace the unit is fitted with an open
fire programme. When needed the installer or
maintenance mechanic can turn this programme on.
If the open fire programme is turned on the supply
fan cannot be turned on or off manually.
When can the supply fan not be turned on?
The supply fan cannot only be operated manually
but can also be controlled automatically by the unit
itself. This occurs in the winter to protect the unit
from freezing. If the supply air is too cold for the
unit, the unit will automatically switch the supply fan
off. In this case the supply fan cannot be turned on
manually.
Action on
display
Reaction on
display
Explanation
1Press and hold
for at
least 3 seconds
The supply fan is
turned off.
The light above the
button turns green.
2Press and hold
for at
least 3 seconds
The supply fan is
turned on.
The light above the
button turns green.
The supply fan will not automatically
turn back on. Do not forget to turn
the supply fan back on later on.
2.5 Setting a overrun timer for the RFZ
The ventilation setting can be increased for a set
time using one button on the RFZ. This can be
usefull when additional ventilation is needed for a
short time like during cooking and showering. How
to switch the overrun timer on or off can be found in
the document of the RFZ. The RFZ has two overrun
timers which must be set separately.
The overrun timer for briefly pressing the RFZ must
be set in P-menu 25. This timer can be set between
1 minute and 10 minutes.
The overrun timer for pressing and holding the RFZ
must be set in P-menu 26. This timer can be set
between 1 minute and 120 minutes.
Action on
display
Reaction on
display***
Explanation
1Press The main P-menus
are being entered.
2Press The sub P-menus of
the selected P-menu
are being entered
3Press until
P25 or P26
appears
The different sub
P-menus of the
selected P-menu are
being displayed.
4Press The selected
P-menu is being
entered.
5Press Time delay is
increased with 1
minute.
Or press Time delay is
decreased with 1
minute.
6Press Time delay is
confirmed and
returned to the sub
P-menus of the
selected P-menu.
Press Old settings are
restored and
returned to the sub
P-menus of the
selected P-menu.
7Press Returned to the
main P-menus.
8Press Returned to the
default screen.
*** The displayed settings are the standard setting of the unit. This may differ from the actual setting of the unit.

EN - 10
2.6 Setting an overrun timer for the SA 1-3V,
SA 0-3V or SAI Flash
The ventilation setting can be increased for a set
time. This can be useful when additional ventilation
is needed for a short time like during cooking and
showering. How to switch the overrun timer on or
off can be found in the document of the SA 1-3V, SA
0-3V or SAI Flash. The overrun timer can be set in
P-menu 23 between 0 minute and 120 minutes.
Action on
display
Reaction on
display***
Explanation
1Press The main P-menus
are being entered.
2Press The sub P-menus of
the selected P-menu
are being entered
3Press until
P23 appears
The different sub
P-menus of the
selected P-menu are
being displayed.
4Press The selected
P-menu is being
entered.
5Press Time delay is
increased by 1
minute.
Or press Time delay is
decreased by 1
minute.
6Press Time delay is
confirmed and
returned to the sub
P-menus of the
selected P-menu.
Press Old settings are
restored and
returned to the sub
P-menus of the
selected P-menu.
7Press Returned to the
main P-menus.
8Press Returned to the
default screen.
2.7 Setting an overrun timer for the second
SA 1-3V, SA 0-3V or SAI Flash (bathroom
switch)
The ventilation setting can be increased for a set
time. This can be useful when additional ventilation
is needed for a short time like during cooking and
showering. How to switch the overrun timer on or
off can be found in the document of the SA 1-3V, SA
0-3V or SAI Flash. The overrun timer can be set in
P-menu 22 between 0 minute and 120 minutes.
Action on
display
Reaction on
display***
Explanation
1Press The main P-menus
are being entered.
2Press The sub P-menus of
the selected P-menu
are being entered
3Press until
P22 appears
The different sub
P-menus of the
selected P-menu are
being displayed.
4Press The selected
P-menu is being
entered.
5Press Time delay is
increased by 1
minute.
Or press Time delay is
decreased by 1
minute.
6Press Time delay is
confirmed and
returned to the sub
P-menus of the
selected P-menu.
Press Old settings are
restored and
returned to the sub
P-menus of the
selected P-menu.
7Press Returned to the
main P-menus.
8Press Returned to the
default screen.
*** The displayed settings are the standard setting of the unit. This may differ from the actual setting of the unit.

11 - EN
2.8 Setting a delay timer for the second SA
1-3V, SA 0-3V or SAI Flash (bathroom
switch)
A high ventilation setting is not always desired, for
instance when you only go to the bathroom for a
short time. Therefore a delay time, in which the unit
will do nothing with the information it receives from
the bathroom switch, can be set. How to switch the
overrun timer on or off can be found in the document
of the SA 1-3V, SA 0-3V or SAI Flash. The delay timer
can be set in P-menu 21 between 0 minute and 15
minutes.
Action on
display
Reaction on
display***
Explanation
1Press The main P-menus
are being entered.
2Press The sub P-menus of
the selected P-menu
are being entered
3Press The selected
P-menu is being
entered.
4Press Time delay is
increased by 1
minute.
Or press Time delay is
decreased by 1
minute.
5Press Time delay is
confirmed and
returned to the sub
P-menus of the
selected P-menu.
Press Old settings are
restored and
returned to the sub
P-menus of the
selected P-menu.
6Press Returned to the
main P-menus.
7Press Returned to the
default screen.
2.9 Setting the delay timer for the filter alert
How fast the filters of the unit needs cleaning
or replacing depends on the air quality of the
environment.
In the countryside the filters may not pollute as
fast as in urban places. Therefore the filter alert
has an adjustable delay timer. After the delay timer
has run out the following filter malfunctions appear
alternately on the display: and .
How to clean or replace the filters is mentioned in
the “Maintenance” chapter. The delay timer can be
set in P-menu 24 between 10 weeks and 25 weeks.
Action on
display
Reaction on
display***
Explanation
1Press The main P-menus
are being entered.
2Press The sub P-menus of
the selected P-menu
are being entered
3Press until
P24 appears
The different sub
P-menus of the
selected P-menu are
being displayed.
4Press The selected
P-menu is being
entered.
5Press Time delay is
increased by 1
minute.
Or press Time delay is
decreased by 1
minute.
6Press Time delay is
confirmed and
returned to the sub
P-menus of the
selected P-menu.
Press Old settings are
restored and
returned to the sub
P-menus of the
selected P-menu.
7Press Returned to the
main P-menus.
8Press Returned to the
default screen.
*** The displayed settings are the standard setting of the unit. This may differ from the actual setting of the unit.

EN - 12
2.10 P menus for the user
A summary of all the accessible P-menus is given
below.
Menu P1 > Status of time programmes
Status
Submenu Description Activated
P11 Is menu P21 currently active? Yes (1) / No (0)
P12 Is menu P22 currently
active?
Yes (1) / No (0)
P13 Is menu P23 currently
active?
Yes (1) / No (0)
P14 Is menu P24 currently active? Yes (1) / No (0)
P15 Is menu P25 currently active? Yes (1) / No (0)
P16 Is menu P26 currently
active?
Yes (1) / No (0)
Menu P9 > Status of additional programmes
Status
Submenu Description Activated
P90 Open fire programme active? Yes (1) / No (0)
P91 Bypass open? Yes (1) / No (0)
P94 Analogue input (0-10V)
active?
Yes (1) / No (0)
P95 Frost protection active? Yes (1) / No (0)
P96 n/a Yes (1) / No (0)
P99 Enthalpy programme active? Yes (1) / No (0)
Menu P2 > Setting time delays
Time delay values
Submenu Description Minimum Maximum General
reset
P21
Only applies to systems
fitted with two SA 1-3V, SA
0-3V or SAI Flash switches.
Delay timer for the bathroom switch (to switch to high
position).
■‘x‘ minutes after operating the bathroom switch,
the unit switches to the high setting.
0 Min. 15 Min. 0 Min.
P22
Only applies to systems
fitted with two SA 1-3V, SA
0-3V or SAI Flash switches.
Overrun timer for the bathroom switch (to switch to normal
position).
■‘x‘ minutes after operating the bathroom switch, the unit
switches back to the normal setting.
0 Min. 120 Min. 30 Min.
P23
Only applies to systems
fitted with a SA 1-3V, SA
0-3V or SAI Flash switch.
Overrun timer for ventilation position 3 (using a hardwired
3-position switch).
■If ventilation setting 3 (high) is switched on briefly
(< 3 sec), the unit will switch to the high setting for ‘x’
minutes and then automatically returns to the
normal setting.
If any switch is operated during this lagging time the unit will
instantly revert to the ventilation position as set at that time.
0 Min. 120 Min. 0 Min.
P24 Filter warning
■ ‘x’ weeks after cleaning the filters the “filter dirty” alert
will reappear.
10 weeks 26 weeks 16 weeks
P25
Only applies to systems
fitted with an RFZ swith.
Overrun timer for ventilation setting 3 (using ).
■ After pressing briefly (< 2 sec.), the unit will switch
to the high setting for ‘x’ minutes and then automatically
returns to the normal setting.
If any switch is operated during this lagging time the unit will
instantly revert to the ventilation position as set at that time.
1 Min. 20 Min. 10 Min.
P26
Only applies to systems
fitted with an RFZ swith.
Overrun timer for ventilation setting 3 (using ).
■After pressing continously (> 2 sec.), the unit will
switch to the high setting for ‘x’ minutes and then
automatically returns to the normal setting.
If any switch is operated during this lagging time the unit will
instantly revert to the ventilation position as set at that time.
1 Min. 120 Min. 30 Min.
P27 n/a 0 Min. 120 Min. 30 Min.

13 - EN
3 CE certification and warranty
Warranty conditions
The unit is covered by a manufacturer’s warranty for
a period of 24 months after fitting up to a maximum
of 30 months after the date of manufacture. Warranty
claims may only be submitted for material faults and/
or construction faults arising during the warranty
period. In the case of a warranty claim, the unit
must not be dismantled without written permission
from the manufacturer. Spare parts are only covered
by the warranty, if they were supplied by the
manufacturer and have been installed by an
approved installer.
The warranty becomes invalid if:
The guarantee period has elapsed;
The device is used without filters;
Parts are used that have not been supplied by the
manufacturer;
Non-authorised changes or modifications have
been made to the unit.
Installation has not been carried out
according to the applicable regulations;
The defects are due to incorrect connection,
inexpert use, or contamination of the system;
On-site (dis)assembly costs are not covered by the
terms of the warranty. This also applies to normal
wear and tear. Zehnder retains the right to change
the construction and/or configuration of its products
at any time without being obliged to alter previously
delivered products.
Liability
The unit has been designed and manufactured for
use in balanced ventilation systems incorporating
Zehnder heat recovery systems. Any other
application is seen as inappropriate use and can
result in damage to the unit or personal injury, for
which the manufacturer cannot be held liable. The
manufacturer is not liable for any damage originating
from:
Non-compliance with the safety, operating and
maintenance instructions in this document;
The use of components not supplied or
recommended by the manufacturer.
Responsibility for the use of such
components lies entirely with the installer;
Normal wear and tear.
End of useful life
Consult with the supplier about what should be
done with the unit at the end of its useful life. If
the unit cannot be returned to the supplier, avoid
disposing of it with the domestic waste, and ask
your local council about the options for recycling
the components or processing the materials in an
environmentally friendly manner.
Furthermore, do not dispose of batteries from the
wireless (RF) switches with the normal waste, but
bring them to the specially designated disposal
locations.
Zehnder Group Nederland B.V.
Lingenstraat 2 • 8028 PM Zwolle-NL • Tel.: [phone]
Handelsregister Zwolle 05022293
Zehnder Group Nederland B.V.

EN - 14
4 Maintenance
Failure to carry out (periodic) maintenance on
the unit ultimately compromises the performance
of the ventilation system.
The unit should be inspected and cleaned every 2
years by a specialist. To ensure a hassle free lifespan
for your unit, we recommend you take out a service
agreement with an expert company.
Ensure the unit has been
disconnected from mains power
before carrying out any maintenance
work.
The power to the unit should not be disconnected
unless the unit is to be taken out of service due to a
serious malfunction, or for filter replacement or any
other compelling reasons.
If the power to the unit is
disconnected, mechanical ventilation
of the dwelling will cease. This can
lead to a build-up of moisture and
results in problems with mould.
4.1 Cleaning or replacing the filters
Replace the filters (at least) every six
months and clean the filters every 2
or 3 months.
When indicated on the display you must clean or
replace the filters. The following filter malfunctions
appears alternately on the display: and
The installer of the unit can provide the necessary
new filters.
Filter type Remarks
ISO Coarse/ ISO ePM1 ISO 16890 compliant

15 - EN
4.1.1 Replacing the internal filters
Action Explanation
1
4 seconds
Reset the filter error by pressing on the
display for at least 4 seconds until the filter warning
disappears.
2Disconnect the power from the unit.
3
A
ComfoAir 160
A
ComfoAir 200
Remove the handles (A) from the unit.
A
A
ComfoAir 350 ComfoAir Standard 300
ComfoAir Standard 375
4
B
ComfoAir 160/200 ComfoAir 350
ComfoAir Standard 300/375
Remove the dirty filters (B) from the unit.
5Install the clean filter back into the unit and
reconnect the power.
When using the unit for the first time, it
is recommended to replace the filters
(and clean the valves) first. During the
construction phase the ventilation system
could have become dirty with building
dust.

EN - 16
4.1.2 Cleaning the internal filters
Vacuum the filters (B) with a vacuum cleaner instead
of replacing them with new filters.
When using the unit for the first time, it is
recommended to clean the filters (and valves)
first. During the construction phase the
ventilation system could have become dirty with
building dust.
4.2 Cleaning the valve
Clean the valves (at least) twice a year.
1. Mark the setting of the valve;
2. Remove the valve from the wall or ceiling;
3. Clean the valve in a solution of soap and warm
water;
4. Rinse the valve thoroughly and wipe dry;
5. Place the valve back WITH EXACTLY THE SAME
SETTING (and IN THE SAME HOLE);
6. Repeat this procedure for the other valves.
Some valves have a filter behind it. If a filter is
present clean this in the same way as the valve.
About the valve settings
The ventilation air is supplied and discharged
by means of valves. Gaps under or near doors
in the dwelling ensure that the air flows in the
right direction. In order to ensure that the correct
ventilation volumes are maintained in the rooms, the
following must be observed:
Do not seal the gaps under or near the doors. For
example by furniture, draught excluders or deep-
pile carpet. The gap should be at least 10mm;
Do not change the settings of the valves;
Do not swap the valves around.
The installer will have set all the valves to ensure
the optimum performance of the ventilation system.
Therefore, do not change the setting of the valves.
4.3 Condensation drain
Ensure that the water seal (u-bend) connected to the
domestic waste-water system is always full of water.
4.4 Maintenance by the installer or
maintenance mechanic
Not all neccesary maintenance can be done by
the user.
Once every 2 years the installer or a maintenance
mechanic should come by for the maintenance
inside the balanced ventilation system.
Some installers offer a full maintenance contract
package where the user maintenance can also be
integrated.
5 Malfunctions
In the event of a malfunction, the corresponding
malfunction code will be displayed on the display of
the unit.
In event of a filter malfunction the filter must be
cleaned or replaced as described in the Maintenance
chapter.
In the event of all other malfunction:
1. Note down the malfunction code that appears on
the display of the unit
2. Note down the unit type.
This is given on the identification plate on the unit
near the power supply.
3. Contact the installer or maintenance mechanic
and give him the noted information.
The system should not be disconnected from the
power supply, unless the unit must be taken out of
service due to a serious malfunction, or for filter
cleaning/replacement or any other compelling
reasons.
If the unit is disconnected from the
power supply, mechanical ventilation
of the dwelling will cease. This can
lead to a build-up of moisture and
results in problems with mould.
If the unit is installed in an area with a higher
average humidity (such as bathroom or toilet) the
probability of condensation on the outside of the
unit is high. This is similar to condensation on a
window and no action is needed.

17 - EN
I Installation/test report
Date Address
Work instruction Town/city
Commissioning
party Project type
Installed by Residence
type
Gemeten door Unit type
Return
Room Position Required
[m3/h]
Tested [m3/h] Type valve Settings valve Settings unit
Kitchen P30
Bathroom P31
Toilet P32
…P33
…
…
Total:
Supply
Room Position Required
[m3/h]
Tested [m3/h] Type valve Settings valve Settings unit
Living room P34
Bedroom 1 P35
Bedroom 2 P36
Bedroom 3 P37
…
…
…
Total:
Pressure
Measured Supply
[Pa]
Return
[Pa]
Press pressure
Suction pressure
Total:

EN - 18
II Maintenance log
2 or 3 months after installation:
Activity Y1 Y2 Y3 Y4 Y5 Y6 Y7
Clean the filters
6 months after installation:
Activity Y1 Y2 Y3 Y4 Y5 Y6 Y7
Replace the filters
Clean the valves
9 months after installation:
Activity Y1 Y2 Y3 Y4 Y5 Y6 Y7
Clean the filters
12 months after installation:
Activity Y1 Y2 Y3 Y4 Y5 Y6 Y7
Replace the filters
Clean the valves
Inspect and clean the condensation drain
Inspect and clean the air ducts
Inspect and clean the casing of the unit
Inspect and clean the heat exchanger
Inspect and clean the fans
Inspect and clean the pre heater filter
Date Activity Initials

19 - EN
2 or 3 months after installation:
Activity Y8 Y9 Y10 Y11 Y12 Y13 Y14
Clean the filters
6 months after installation:
Activity Y8 Y9 Y10 Y11 Y12 Y13 Y14
Replace the filters
Clean the valves
9 months after installation:
Activity Y8 Y9 Y10 Y11 Y12 Y13 Y14
Clean the filters
12 months after installation:
Activity Y8 Y9 Y10 Y11 Y12 Y13 Y14
Replace the filters
Clean the valves
Inspect and clean the condensation drain
Inspect and clean the air ducts
Inspect and clean the casing of the unit
Inspect and clean the heat exchanger
Inspect and clean the fans
Inspect and clean the pre heater filter
Date Activity Initials

Zehnder Group Sales International
Almweg 34 • 77933 Lahr • Germany
T [phone] • F [phone]
[e-mail] • www.international.zehnder-systems.com
ZGNL-Manual_10001084712-40023980, V1220 EN, Subject to change