Zehnder Rittling ComfoAir Flex User manual

■Decorative radiators ■Comfortable indoor ventilation ■Heating and cooling ceiling systems ■Clean air solutions
Zehnder ComfoAir Flex
Quick Guide
Refer to the full manual for the complete range of information and instructions.
For the latest version of the full manual please scan the QR-code on the front of the unit
or visit https://www.zehnder.co.uk
If you have questions about the ComfoAir Flex, call our Technical Team on 01276 408404
or email [email protected].
Description
The ComfoAir Flex is a ceiling mounted balanced ventilation system with heat recovery for energy-efficient ventilation in
houses. The ComfoAir Flex removes dirty air from the wet rooms and supplies the same amount of fresh air to the dry rooms.
Use of the ComfoAir Flex
■The ComfoAir Flex can only be used when
it has been installed according to the
instructions and guidelines in the ComfoAir
Flex installer manual.
■Do not open the casing. The installer makes
sure that all parts that can cause personal
injury are safely contained within the casing.
■The ComfoAir Flex 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 ComfoAir
Flex.
■Children must not clean and maintain the
ComfoAir Flex unsupervised.
the
C
omfoAir Flex
ComfoAir Flex 250 and 350
Read the manual carefully before use.
Keep the Quick Guide near the ComfoAir Flex
to make sure that you always know where the
Quick Guide is.
Ensure that the gaps under or near doors are
never obstructed.
Condensation may occur on the outside of the
ComfoAir Flex. It is not necessary to remove it.
Dispose the ComfoAir Flex in an environmentally
friendly manner. Do not dispose the ComfoAir
Flex with your household waste.

Safety
Read all the safety information carefully before you use the
ComfoAir Flex for the first time to make sure that you use the
ventilation unit safely and correctly. Refer to the full manual for
the necessary information and the applicable safety regulations
and installation regulations.
WARNING
Electrical hazard
Safety instructions – general
■Always obey the safety regulations,
warnings, comments and instructions
in this quick guide. Failure to do so may
lead to personal injury or damage to the
ComfoAir Flex.
■Installation, commissioning and
maintenance must be carried out by
a certified installer unless instructed
differently. A non-certified installer can
cause personal injury or damage the
performance of the ventilation system.
■After installation, all parts that can cause
personal injury are contained safely
within the casing. Tools are required to
open the casing.
■Do not disconnect the power from
the ComfoAir Flex, unless instructed
differently in the ComfoAir Flex manual.
This can lead to a build-up of moisture
and result in problems with mould.
■Do not change technical specifications
of the ComfoAir Flex given in this
document. Changes can cause personal
injury or damage the performance of the
ventilation system.
Safety instructions – maintenance
■Make sure that the ComfoAir Flex is not
used with exposed fire (fireplace or stove).
The ComfoAir Flex can pull the smoke or
gases from the fire into the house.
■Get an installer to inspect and clean the
ComfoAir Flex at least every two years
to make sure that the performance
of the ventilation system does not
deteriorate.
■Replace the filters at least every
six months to keep the indoor air
comfortable and healthy and the
ComfoAir Flex clean.
■Clean all valves and grilles at least
every six months to make sure that the
capacity of the ventilation system does
not decrease.
■If the supply cord is damaged, it must
be replaced with the original cord by
the manufacturer, its service agent or
similarly qualified persons in order to
prevent accidents.
Safety instructions – installation
■Two people are required when lifting the
ComfoAir Flex.
■Always obey the general and locally
applicable construction, safety and
installation regulations.
■Unplug the unit from the wall outlet
to disconnect the unit from the power
supply. If the unit does not have a plug,
use a switch as specified in
EN 60335-1 (with switch-off of all poles
and 3 mm overvoltage category III).
■Always disconnect the power from
the ComfoAir Flex before you work on
the ventilation system. If the ComfoAir
Flex is open while in operation, it can
cause personal injury. Make sure that
the ComfoAir Flex cannot be set to ON
accidentally.
■Always connect air ducts of at least
900 mm length to the ComfoAir Flex
before you connect the unit to the
power supply to make sure that the
motor cannot be touched while the
ComfoAir Flex is in operation.
■Always take ESD protective measures
when you work with electronics, such as
wearing an antistatic wristband. Static
electricity can cause damage to the
electronics.
■Install the ComfoAir Flex in a frost-free
area (minimum 7 °C) for frost protection
of the condensation drain.
■Install the ComfoAir Flex on a
230V-50Hz mains connection. Any other
power will damage the ComfoAir Flex.
■The ComfoAir Flex is designed for use
in residential areas only. The unit is not
applicable for commercial use, e.g. in
pool areas or saunas. Installation in an
industrial environment can damage the
unit.
Zehnder Group Zwolle B.V. • Lingenstraat 2 • 8028 PM Zwolle • NL • Tel.: [phone]
Company Register of Zwolle 05022293
2 - EN

Installation (INSTALLER)
Refer to the full Installer manual of the ComfoAir Flex for the necessary information and the applicable safety regulations.
The entire installation must comply with the applicable (safety) regulations as stated in:
■local EU Standard on safety provisions for low-voltage installations;
■manufacturer‘s installation manual (see back page of the Quick Guide for Zehnder‘s contact details).
Use the box handles to lift up the box. Keep the box as this shows the installation template.
Before you start the installation make sure that there is enough space to install the unit.
Check the identification type plate to make sure that you have received the correct unit type.
Box Contents
Contact your supplier directly in case of damage or missing items.
The box must contain:
■The ComfoAir Flex unit.
■4 turnable bends (pre-installed on the unit).
■A flat box with:
- The double dry siphon.
- 2 Rubber condensate connection grommets for the double dry siphon.
- 2 Fasteners for the double dry siphon.
- 4 Spacer brackets
- 12 Fasteners for the spacer brackets.
■Documentation.
4x
12x
2x 2x
3 - EN

Installation steps (INSTALLER)
Zehnder ComfoAir Flex
Installation template
Ø 8mm
always the
best climate
A
A
BB
BB
A
A
Zehnder ComfoAir Flex
Installation template
Ø8mm
always the
best climate
A
A
BB
BB
A
A
A
A
A
B
B
B
B
A
13mm
30-40 mm
x2x3
ETA ODA
SUP EHA
ODA ETA
EHA SUP
RIGHT
configuration
LEFT
configuration
±0,5%
< -0,5%
> +0,5%
0,5% = 0,5 cm / 100 cm
>2%
1 Use the installation template on the
box for the position of the unit and the
attachment of the brackets on the unit.
4 Possible position on the ceiling.
Be aware of the power cord routing.
The inclination will be eliminated
when the power cord is pinched.
7 Install all to be connected ancillaries.
Follow the instructions in the related
manuals.
10 Double dry siphon installation:
■Fit the 2 rubber condensate
connection grommets on both sides
of the double dry siphon.
2 Remove all the turnable bends
before installation to prevent the
unit from falling.
5 Do the inclination check in order to
prevent water leakage (follow the
measurements to the ceiling as
pictured above).
8 Reconnect all turnable bends to the
unit.
11 Fasten the double dry siphon:
■Make sure that you move the
brackets of the double dry
siphon fully in the pockets of the
casing.
■Fasten the double dry siphon
with the 2 screws to the casing.
3 Determine the direction of the airflow.
6 Do the level check.
Make sure that the unit is level to
prevent water leakage.
9 Connect the air distribution
components.
12 Always install the condensate
discharge pipe at an angle of >2 %
to prevent water leakage.
Always use a 32 mm socket
with rubber rings.
Do not use glue as you may
need to be able to remove the
double dry siphon.
User
interface
Filter
4 - EN

Commissioning (INSTALLER)
Open cover
Next
Locate QR code
Locate the QR code. Scan this code
on the next screen.
Back
Next
Open Cover
Open the user interface cover with two fingers
Confirm
Confirm Back
YES
Cancel Commissioning Wizard
Back
Back
OK
Cancel
Are you sure?
ComfoAir not foun on the current WIFI
network. Start Access Point Mode
connection to ComfoAir?
Choose your system Back Searching...
JOINCancel
Back
Manual input
Scan WiFi Acess Point QR code
Scan the QR-code behind the user interface
cover of the ventilation unit to connect to it’s
WiFi in Access Point Mode
JOIN
Cancel
“ComfoControl” Wants
to Join WiFi Network”
Flex
M
anual inpu
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at
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co
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ect
to
i
t
’
s
W
iFi in Access Point Mode
JO
IN
Cancel
“
C
omfo
C
ontrol” Wants
to
J
oin WiFi Network”
Flex
Confirm
Confi
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onfi
on
onfi
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on
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rm
rm
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rm
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rm
rm
rm
rm
rm
rm
rm
m
m
rm
r
rm
rm
m
m
m
rm
m
AWAY BOOST
OFF OFF
UNIT STAUTS RESETsCHEDULER FILTERSTASKS
Back Confirm
Cancel Commissioning Wizard
END OF COMMISSIONING WIZARD
180
Succesfully completed the
commissioning wizard
Measured maximum air flow
Cancel
Next
Enable Access Point Mode
Put the system into Access Point Mode by
pushing the connection button on the user
interface of the ventilation unit. The WIFI LED Will
blink blue fast.
My systems Done
New Gateway
Home
Wifi network Access Point Mode
Wifi settings
Remote access
Change pin code
Receive alarm notifications
Manage registered apps
ComfoAir Flex at home
Wifi network
Wifi settings
Remote access
Change pin code
Receive alarm notifications
Manage registered apps
My systems Done
New Gateway
C
o
m
f
Wif
i
fo
Air Fl
e
x
at
h
o
m
e
i
n
et
w
o
r
k
Wi
f
i setting
s
R
Re
m
ote
access
C
C
hange pin cod
e
R
R
eceive alarm notifications
Manage registered apps
M
anage reg
i
stere
d
a
My
s
y
stem
s
D
o
n
e
New
G
ateway
YES
NO
The ComfoAir system is connected in Access
Point Mode for temporary use.
Do you want to setup a permanent
connection to your home WiFi network now?
Connect to Home WiFi network
Add system
Done My systems
Disconnected
Disconnected
Connected
e
ms
sco
n
Dis
Discon
o
nnected
Add
system
D
one M
y
s
y
st
e
C
o
Delete
Menu
ADVANCED
INSTALLER
SUPPORT
MY SYSTEMS
TEMPORARY
A
A
DVANCE
D
IN
S
TALLE
R
S
UPP
O
R
T
MY
S
Y
S
TEM
S
TEMP
O
RARY
HOME
1 ■ Scan the QR code to download the
Zehnder ComfoControl App.
■
Connect the unit to the power.
After the start up the Power LED
is white and the Error LED is blue
and blinking. The unit is ready to be
commissioned.
2 ■ Start up the Zehnder ComfoControl
App and select the ComfoAir Flex.
■
Select “OK” for direct connection
to the unit.
■
Follow the commissioning
instructions in the App.
When a message with an Internet
connection problem pops-up,
select “Use mobile data” and
continue.
4 Open the user interface cover with
two fingers and find the QR code.
Apply ESD guidelines. Do not
touch the internal components
to prevent damage to the
electronics.
7 ■The commissioning wizard starts. For
more information consult the Installer
manual.
■
Complete the basic configuration of
the wizard.
The wizard steps are necessary to
prevent frost and water damage to
the unit.
Checkmark the applicable situation
on the air direction sticker.
5 Scan the QR code on the user
interface and select “JOIN”.
Close the interface cover.
8 ■Make sure that all commissioning
steps are done and select
“Confirm”.
The commissioning is finalized.
■
Make sure that all the other
(optional) installer settings are
done.
Complete overview of the installer
settings can be found in the Installer
manual.
9 ■In the menu select “MY SYSTEMS”.
■Swipe to the left to delete the
temporary connection to the unit.
3 Follow the instructions in the App
and push the connection button
(1x) on the user interface of the unit.
6 ■Rename the unit from “Home” to
“Temporary”.
■
Add gateway. Select “NO” for
temporary connection.
5 - EN

Operation (USER)
You can operate the unit with the Zehnder ComfoControl App and with Zehnder controls, such as the Zehnder
ComfoSwitch C and Zehnder CO2 Sensor C. The user interface shows important information about the status
of the unit and is used for installation and maintenance.
It is recommended to change the filters via the filter wizard of the Zehnder ComfoControl App.
The filter button can also be used.
B C AD
E
Position Part
A Unit
B Filter cap for easy access to the filters (2x)
C Filters for air filtering (2x)
D Front cover
E User interface
Position Part
A Power LED + airflow preset 1-3 LED
B Filter LED
C Error LED
D WiFi LED
E RF LED
F Filter button
G Connection button
1 Open the Filter wizard in the Zehnder
ComfoControl App and follow the
steps or push the filter button on the
user interface on the unit.
2 Remove the first filter cap and the filter.
3 Remove the second filter cap and
the filter.
Make sure to write down which
filter compartment (left or right)
was used for ISO ePM1 filter
(if present).
4 Place the supply air filters into the unit.
5 Place the second filter into the unit on
the opposite (extract air) side.
6 Put the filter caps back.
7 ■Follow the steps in the Zehnder
ComfoControl App, the unit will
return to normal operation after the
filter change.
■
When using the user interface
on the unit push the filter button
to finish the filter change.
The filter LED blinks green first
and the green light comes on
permanently when the filter change
is done.
■When the color of the Filter LED is orange, the filters must be replaced soon. Please order the new filters online via the
Zehnder Filtershop (available in the Zehnder ComfoControl App).
■When the color of the Filter LED is red, the filters must be replaced immediately.
Change the filters (USER)
6 - EN

Connecting (USER)
■Make sure that the name (SSID) and password of your local WiFi network is available (this is typically found on your router).
■Download the Zehnder ComfoControl App from the App Store or Play Store.
■Make sure that the ComfoAir Flex is connected to the power supply.
■For the first time use: Zehnder recommends to delete all the previous WiFi settings and connections to the ComfoAir Flex -
push the connection button (G) longer than 10 seconds.

Open cover
Next
Locate QR code
Locate the QR code. Scan this code
on the next screen.
Back
Next
Open Cover
Open the user interface cover with two fingers
ComfoAir Flex at home
Wifi network
Wifi settings
Remote access
Change pin code
My systems Done
New Gateway
C
o
m
W
i
mf
oAir Flex at hom
e
i
fi networ
k
Wi
f
i settings
R
R
emote access
C
C
han
g
e pin code
M
y systems Don
e
New
G
ateway
YES
NO
The ComfoAir system is connected in Access
Point Mode for temporary use.
Do you want to setup a permanent
connection to your home WiFi network now?
Connect to Home WiFi network
SELECT WiFi NETWORK
Edit Gateway WiFi settings
Ziggo
Ziggo
E
dit Gateway
W
iFi setting
s
Ziggo
T
W
O
RK
S
ELE
C
T WiFi NE
T
Ziggo
Z
iggo
Ziggo
o
Zi
gg
o
Zi
gg
o
WiFi home network
SELECT WiFi NETWORK
Edit Gateway WiFi settings
Ziggo
Ziggo
Ziggo
Ziggo
WiFi home network
Edit Gatewa
y
WiFi settin
gs
T
W
O
RK
S
ELE
C
T WiFi NE
T
Ziggo
Zi
gg
o
Ziggo
Zi
gg
o
WiFi h
o
m
e
n
et
w
o
r
k
OK
Cancel
Connect
Do you want to connect the ventilation
system to WiFi network WiFi home
network.
SELECT WiFi NETWORK
Edit Gateway WiFi settings
Ziggo
Ziggo
Ziggo
Ziggo
Ziggo
WiFi home network
Edit
G
ateway
WiFi
sett
i
n
gs
T
W
O
RK
S
ELE
C
T WiFi NE
T
Zi
gg
o
gg
Ziggo
Ziggo
Z
iggo
Zi
ggo
WiFi h
o
m
e
n
et
w
o
r
k
OK
Cancel
Are you sure?
ComfoAir not foun on the current WIFI
network. Start Access Point Mode
connection to ComfoAir?
UNIT STAUTS RESETSCHEDULER FILTERSTASKS
Done My systems
ComfoAir Flex at home Connected
Done My systems My systems Done
New Gateway
Home
Wifi network Access Point Mode
Wifi settings
Remote access
Change pin code
Receive alarm notifications
Manage registered apps
AWAY BOOST
OFF OFF
UNIT STAUTS RESETsCHEDULER FILTERSTASKS
Current PIN
1 2 3
4 5 6
7 8 9
0
Back
OK
Cancel
Are you sure?
ComfoAir not foun on the current WIFI
network. Start Access Point Mode
connection to ComfoAir?
Choose your system Back Searching...
JOINCancel
Manual input
Scan the QR-code behind the user interface
cover of the ventilation unit to connect to it’s
WiFi in Access Point Mode
JOIN
Cancel
“ComfoControl” Wants
to Join WiFi Network”
Flex
Manual in
p
u
t
cover
of
the
venti
lation
unit
to
con
nect
t
o
it s
WiFi
i
n
A
ccess
P
o
i
nt
M
o
de
J
O
IN
C
a
n
cel
“
C
omfo
C
ontrol” Wants
to Join WiFi Network
”
Flex
1 ■Scan the QR code to download the
Zehnder ComfoControl App.
■
Connect the unit to the power.
After the start up the Power LED is
white and the Filter LED is green.
If the ERROR LED (C) is blue and
blinking, the unit must be
commissioned by the installer.
2 ■Start up the App and select the
ComfoAir Flex.
■
Select “OK” for direct connection
to the unit.
■
Follow the connection instructions
in the App.
When a message with an Internet
connection problem pops-up, select
“Use mobile data” and continue.
4 Open the user interface cover with
two fingers and find the QR code.
Do not touch the internal
components to prevent damage
to the electronics.
7 ■Select “YES” for permanent access
to your home WiFi.
■
Select the correct WiFi network.
■Enter the correct WiFi password
and select “OK”(2x).
5 Scan the QR code on the user
interface and select “JOIN”.
Close the interface cover.
8 ■Make sure that the WiFi LED (D)
pulses slowly white.
■
When the unit is connected select
“Done”.
■
The App is ready for use.
9 Connect a second mobile device to the
unit:
■
Select the ComfoAir Flex and enter
the PIN code (if requested).
■
We recommend to rename the unit
when you have multiple units in use.
■
Do not change remote and alarm
settings and select “Done”or “Save
the settings”.
■
The App is ready for use by the
second user.
3 Follow the App and push the
connection button (1x) on the user
interface of the unit.
6 ■ We recommend to rename the unit
when you have multiple units in use.
■ Make sure that Remote access
and alarm notification are On
for the best use of the unit. Select
“Done” or “Save the settings”.
Cancel
Next
Enable Access Point Mode
Put the system into Access Point Mode by
pushing the connection button on the user
interface of the ventilation unit. The WIFI LED Will
blink blue fast.
My systems Done
New Gateway
Home
Wifi network Access Point Mode
Wifi settings
Remote access
Change pin code
Receive alarm notifications
Manage registered apps
My systems Done
New Gateway
Home
Wifi network Access Point Mode
Wifi settings
Remote access
Change pin code
Receive alarm notifications
Manage registered apps
7 - EN

Zehnder Group UK Ltd • Concept House, Watchmoor Point, Camberley, Surrey, GU15 3AD
T [phone] • [email protected] • www.zehnder.co.uk
ZGNL-QuickGuide_10001133070_40026142, V0423, EN, Subject to change