Zehnder Rittling ComfoAir Q User guide

Decorative radiators Comfortable indoor ventilation Heating and cooling ceiling systems Clean air solutions
Zehnder ComfoAir Q
Ventilation System
Installer manual

2 - EN
All rights reserved.
This documentation has been made 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.

EN - 3
Table of Contents
Foreword......................................................................................................................................................................4
1 Safety instructions ........................................................................................................................................................5
2 Installation conditions.................................................................................................................................................... 6
3 Transport and unpacking............................................................................................................................................... 6
4 Technical specifications ................................................................................................................................................7
4.1 Unit configuration ..................................................................................................................................................8
4.2 Dimension sketch ..................................................................................................................................................9
4.3 Wiring diagram main board................................................................................................................................... 10
5 Installation procedures ................................................................................................................................................ 11
5.1 Installation on the wall .......................................................................................................................................... 12
5.2 Installation on the floor ......................................................................................................................................... 13
5.3 Installation of the condensation drain .................................................................................................................... 13
5.4 Installation of the air ducts.................................................................................................................................... 14
5.5 Installation of the valves and/or grilles.................................................................................................................... 16
6 Available operating devices ......................................................................................................................................... 17
7 Optional ancillaries...................................................................................................................................................... 18

4 - EN
Foreword
Read this document carefully before use.
With this document you can install the ComfoAir
Q in a safe and optimal manner. In this document
the ComfoAir Q will be referred to as “the unit”.
The unit is subject to continuous development and
improvement. Thus the unit may be slightly different
from the given descriptions.
The following pictograms are used in the
Zehnder documents:
Symbol Meaning
Point of interest.
Risk of compromised performance or damage of
the ventilation system.
Risk of personal injury.
Information found in the user manual
General information about the ventilation system.
CE / UKCA certification and warranty.
How to replace the filters in the unit.
How to clean the valves and/or grilles in the ventilation system.
How to use the display on the unit.
Information found in the service manual
Commissioning procedures.
Maintenance procedures.
Malfunction procedures.
Available service parts.
Possible combinations RF controls.
Extensive technical data.
Questions
Please contact your local Zehnder representative if
you have any questions or would like to order a new
document, filters or spare parts, as specified in the
Installer manual. The contact details of your Zehnder
representative can be found on the final page of this
document.
Zehnder Group Zwolle B.V.
Lingenstraat 2 • 8028 PM Zwolle • NL
T [phone]
Company register of Zwolle 05022293

EN - 5
1 Safety instructions
■Always obey the safety regulations,
warnings, comments and instructions
given in this document. When
the safety regulations, warnings,
comments and instructions in this
document are not obeyed personal
injury or damage to the unit can occur.
■Always obey the general and locally
applicable construction, safety and
installation instructions of the local
council, electricity and water boards or
other agencies.
■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 assembly/installation
manual.
■Always connect air ducts of at least
900 mm to the unit before you connect
power to the unit. This ensures the
motor cannot be touched while the
unit is active.
■Do not turn on the power of the
unit until the complete mechanical
installation is finished. After installation
all parts that can cause personal injury
are secured inside the casing. Tools
are required to open the casing.
■The installation, commissioning and
maintenance must be carried out
by a certified engineer unless the
instructions state otherwise. A non-
certified engineer can be personally
injured or damage the performance of
the ventilation system.
■Do not modify the unit or the
specifications given in this document.
A modification can cause personal
injury or damage the performance of
the ventilation system.
■Always disconnect all poles of the
power supply to the unit and optional
connected ComfoSplitter before
you start working on the ventilation
system. The unit can cause personal
injury when it is open while running.
Make sure the unit cannot switch back
on by accident.
■Only install a post-heater with a SELV
(Safety Extra Low Voltage) 0-10V
connection with its own temperature
safety control.
■If the power 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.
■Always take ESD protective measures
when you work with electronics, such
as wearing an antistatic wristband.
Static electricity can cause damage to
the electronics.

6 - EN
2 Installation conditions
■Always install the equipment according to the
latest regulations for installation of your country.
■Install the unit on a 230V~ 50Hz mains connection.
Any other power connection will damage the unit.
■The unit is designed for residential use. The unit
is not made for industrial use, such as swimming
pools or saunas. Installation in an industrial
environment can damage the unit.
■Check if the installation area will remain in the
permitted temperature range throughout the year.
You can find the permitted temperature range in
the chapter “Technical specifications”.
■It is recommended not to install the unit in areas
with a higher than average humidity (such as
bathroom or w.c.). This will prevent condensation
on the outside of the unit.
■Check if the temperature of the moved air will
remain in the permitted temperature range
throughout the year. You can find the permitted
temperature of the moved air in the chapter
“Technical specifications”.
■Check if the electrical installation is suitable for
the maximum power of the unit. You can find the
maximum power values in the chapter “Technical
specifications”.
■Check if the electrical installation is suitable
for the maximum power of the desired
optional ancillaries. You can find the technical
specifications of the desired optional ancillaries in
their associated manuals.
■Check if the installation area of the unit has
sufficient room for the following:
- The unit (no additional room needed on the side)
- Carrying out maintenance activities in front of
the unit (at least 1m);
- The condensation drain below the unit (optional);
- The air duct system including sound attenuators;
- The wiring for an external wired controller
(optional);
- The desired optional ancillaries and when
needed its easily accessible electrical power
connection;
- The easily accessible electrical power
connection of the unit. You can find the length
of the power cable in the chapter “Technical
specifications”.
■Within a distance of 1 metre or at most the length
of the fixed (or supplied) power cable (both 3-core
and 5-core), an earthed wall outlet must be
available.
■Always use the fixed (or supplied) power cable
(both 3-core and 5-core).
■For safety reasons, do not use an extension cable.
3 Transport and unpacking
You can find the permitted transport and
storage temperature in the chapter “Technical
specifications”.
Transport and unpack the unit with care. Discard
the packing material in an environmentally friendly
manner.
Checking the delivery
Speak to your supplier immediately in case of
damage or an incomplete delivery. The delivery
should at least include:
Appearance example Name
The unit
Check the identification plate to
ensure that it is the correct type
Mounting bracket
Condensation drain set
Unit with standard heat exchanger:
■Condensation drain adapter 32mm
pipe;
■Condensation drain adapter 1¼”
thread pipe;
■Condensation drain sealing cap.
Unit with enthalpy exchanger:
■2 condensation drain sealing caps.
Power cord
Documentation
Dust cover
Only remove the dust cover
just before you install the air
ducts.
Information found on the identification plate
Suffix Meaning
ComfoAir Product family name.
QProducttypename.
350 Maximum air volume of 350 m3/h.
450 Maximum air volume of 450 m3/h.
600 Maximum air volume of 600 m3/h.
GB Country code of the unit.
R The unit has been set with the supply and extract air
on the right side as default.
L The unit has been set with the supply and extract air
on the left side as default.
ST The unit has four fixed air connections.
PH The unit has a pre-heater installed as default.
ERV The unit has an enthalpy exchanger installed as
default.

EN - 7
4 Technical specifications
Q 350 Q 450 Q 600
Performance
Minimal airflow when pre-heater is off 75 m3/h 75 m3/h 75 m3/h
Minimal airflow when pre-heater is on 100 m3/h 100 m3/h 100 m3/h
Maximal airflow 350 m3/h 450 m3/h 600 m3/h
Thermal Efficiency
(According to EN 13141-7:2010)
92% 90% 89%
Electrical data
Maximal power including pre-heater
(At -15°C and max airflow)
1850W 10.00A 2240W 10.80A 2620W 12.70A
Maximal power excluding pre-heater 180W 1.42A 250W 1.98A 350W 2.77A
Power Supply 230V±10%, single phase, 50Hz, 2.5m
Cos I0.36 - 0.54 0.32 - 0.57 0.4 - 0.62
Internal fuse F5010
(10A)
F5015
(16A)
F5015
(16A)
Connection data
Air connection size (Ø) Inside: 160 mm
Outside: 190 mm
Inside: 180 mm
Outside: 200 mm
Inside: 180 mm
Outside: 200 mm
Condensation drain size (Ø) Pipe version: 32 mm
Thread version: 1¼”
ComfoNet data
Maximal power 400mA@12V
Maximal non powered devices 4
Cable type 2x unshielded twisted pair,
stiff (solid) wires 0,6 mm2(max 50 m)
Colour code 12V: red
GND: black
CAN_H: yellow
CAN_L: white
Material specifications
Housing Coated Sheet Steel
Interior EPP and ABS
Heat Exchanger Polystyrene
Enthalpy Exchanger Polyethylene-polyether-copolymer
General
IP classification IP40
ISO classification B
Temperature range during transport and
storage
-40°C up to +60°C
Temperature range moved air -20°C up to +60°C
Temperature range installation area 0°C up to 45°C
Relative air humidity installation area <90%; non-condensing
Weight 50 kg
Filter type Remarks
Iso Coarse / ISO ePM1 ISO 16890 compliant

8 - EN
4.1 Unit configuration
N
I
A
H
M
D
E
L
F G
J
C
B
Position Part
A Semi-transparent visor for access to the display and the filter caps.
B Engraving of the air connections on the cable tray cover.
C 2 level adjusters.
D Cable tray cover for cover and protection of the connected cables.
E Mains power connection and identification plate detailing information on the unit (not visible).
F 2 ComfoNet plug-in connections.
G ComfoNet RJ45 connection.
H Front cover for an air tightseal.
I Display behind a display cover to operate the unit.
J Main board behind the display cover.
K RF PCB on the main board
L Pre-heater for frost protection. (optional; standard in unit version “VV” )
M 2 condensation drains to drain the condensation of the warm extract air.
N 4 connections for the air ducts.
The available service parts can be ordered as a special service set from Zehnder. Each set will be supplied with
its own service instruction explaining how to replace the part. Please contact your local representative, details of
which can be found on the final page, for the article codes and prices of all available sets.

EN - 9
4.2 Dimension sketch
160
190
570
123280,5
725
490
180
200
570
123280,5
725
490
ComfoAir Q 350 ComfoAir Q 450 / ComfoAir Q 600

10 - EN
4.3 Wiring diagram main board
If the power 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.
Legend
Meaning
Code Meaning Code Orientation: Right Orientation: Left
PE Green / Yellow DISPLAY Display screen Display screen
N / BU Blue RF Not applicable Not applicable
L / BK Brown or Black VV Pre-heater Pre-heater
WH White BYP Modulating by-pass actuator Modulating by-pass actuator
RD Red M1 Exhaust motor Supply motor
GN Green M2 Supply motor Exhaust motor
YE Yellow S1 Sensor outdoor air Sensor extract air
GY Grey S2 Exhaust air pressure sensor Supply air pressure sensor
VT Violet S3 Sensor supply air Sensor exhaust air
17 / 18 ComfoNet plug-in S11 Sensor extract air Sensor outdoor air
19 Not applicable S22 Supply air pressure sensor Exhaust air pressure sensor
S33 Sensor exhaust air Sensor supply air

EN - 11
5 Installation procedures
Do not turn on the power of the
unit or optionally connected
ComfoSplitter until the complete
mechanical installation is finished.
After installation all parts that can
cause personal injury are secured
inside the casing. Tools are required
to open the casing.
Be aware of electromagnetic interference (EMC)
during installation.
■ Within a distance of 1 metre or at most the length
of the fixed (or supplied) power cable (both 3-core
and 5-core), an earthed wall outlet must be
available.
■ Always use the fixed (or supplied) power cable
(both 3-core and 5-core).
■ For safety reasons, do not use an extension cable.
■Make sure there is a barrier (e.g. separate channel
or compartment) or minimum distance of 150 mm
between power cables (e.g. 230V) and cables
susceptible to interference (e.g. control, low
voltage, interface, LAN, digital or analog signal).
■If interfering power cables and cables susceptible
to interference need to intersect each other, make
sure that this occurs perpendicularly.
These measures will minimise the EMC disturbance
as much as possible and will provide the best
communication.
Unplug the unit from the wall outlet to disconnect it from the power supply.If the
unit does not have a plug, use a switch according to EN 60335-1 (with switch-off
of all poles and 3 mm overvoltage category III).
Access for maintenance
1m

12 - EN
5.1 Installation on the wall
≥250mm
≥1050mm
640mm
1 2
12
Install the unit against a wall
with a minimum mass of 200
kg/m2.
The given height is an indication. The
selected type of condensation drain
will determine the exact height.
Attach the mounting bracket to the
wall.
■Make sure the openings on the
bracket are on the top;
■Make sure the bracket is level.
Hang the unit on the mounting bracket
fixed to the wall.
■For Zehnder ComfoPipe Plus air
ducts: use opening 1;
■For all other air ducts: use opening
2.
34 5
Level the unit using the level adjusters. Open the semi-transparent visor. Pull the cable tray cover forwards.
6
Example ancillaries
7
Example siphon
8Example air duct
Install the necessary ancillaries as
instructed in their associated manuals.
Install the siphon to the bottom of
the unit as instructed in the chapter
“Installation of the condensation
drain”.
Install the air ducts to the unit as
instructed in the installation chapter
“Installation of the air ducts”.
Only remove the dust cover
just before you install the air
ducts.
9Example valve
Example grille
10 11
Install the valves and grilles as
instructed in the installation section of
the valves and grilles.
Connect the power supply to the unit.
Install all parts back in reverse order.
Commission the unit as instructed in
the Service manual.
Run the first part (basic
configuration) of the
commissioning wizard
immediately after turning on
the power. These settings are
necessary to protect the unit
from frost and water damage.

EN - 13
5.2 Installation on the floor
1100
mm
250
mm
1Example of instruction 2
Use a Zehnder mounting frame on the
floor (available as an optional extra)
for walls with a mass of less than
200 kg/m2. This will reduce contact
noise as much as possible.
Install the mounting frame as
instructed in its installation
instructions.
Place the unit on the mounting frame.
■Make sure the unit is locked in
place.
3Continue at step 4 of the installation on the wall procedure.
5.3 Installation of the condensation drain
ART.NR. : 200502195
Ø 32mm
G 1 ¼”
min 500Pa
RIGHT orientation LEFT orientation
The condensation created by the unit must be
drained off frost-free, at a gradient and incorporate
an air seal. To drain the condensation from the
unit, two Zehnder bayonet connections are located
on the bottom of the unit. These connections are
not airtight. Thus it is necessary to close off these
connections with the separately delivered sealing
cap(s) or with a dry siphon.
Do not install a water lock (U-bend) on to the
unit. On warm days the water can evaporate from
the siphon.
Enthalpy exchanger installed
When the unit is fitted with an enthalpy exchanger
the humidity from the extracted air is partly
transferred to the fresh supply air. In this case there
is no condensate that must be drained from the unit.
Thus a dry siphon is not necessary with an enthalpy
exchanger.
When no dry siphon is installed, seal off both
Zehnder bayonet connections with the separately
delivered condensation drain sealing caps. The unit
is not airtight if these connections are left open.
When desired you can always connect a dry
siphon to any Zehnder bayonet connection.

14 - EN
1. Connect the supplied condensate drain sealing
cap on the Zehnder bayonet connection to the
supply / extract air side of the unit.
(Left orientation = left side;
Right orientation = right side).
2. Connect one of the supplied condensate drain
adapters (or second condensate drain sealing
cap) on the Zehnder bayonet connection on the
outside / exhaust air side of the unit
(Left orientation = right side;
Right orientation = left side).
3. Connect a dry siphon to the condensate drain
adapter. Please take into account the following
issues:
■The supplied condensate drain adapters are:
- one smooth pipe with a diameter of 32 mm;
- one threaded pipe with a diameter of 1 1/4”.
■Zehnder recommends using a sealing sleeve
to make an airtight connection between the
condensate drain pipe adapter. The condensate
drain pipe adapter is not suitable for gluing.
■Make sure the installed pipeline is never higher
than the bottom of the unit.
■Install a dry siphon suitable for negative (under)
pressure of at least 500Pa. This will guarantee
an airtight seal. When using a siphon with ball as
a dry lock this can be achieved by placing a pipe
or hose of at least 90mm between the dry lock
and the Zehnder bayonet connection.
■The dry siphon of the unit may not be
connected directly to the domestic waste-water
system. The dry siphon of the unit must have a
free outlet to the siphon of the domestic waste-
water system.
Make sure the water lock of the domestic
waste-water system is always filled with water.
This prevents sewer smells from entering the
dwelling.
5.4 Installation of the air ducts
Air duct systems
Zehnder ComfoPipe (Plus) Zehnder ComfoWell
Zehnder ComfoFlat Zehnder ComfoTube
Flexalen Spiro Pipe
The unit can be installed with any standard non
flexible air duct system or with a special Zehnder
air duct system. When installing a Zehnder air duct
system refer to its installation instructions first.
The next aspects must always be kept in mind during
the installation of the air ducts:
Always connect air ducts of at
least 900 mm to the unit before you
connect the power to the unit. This
ensures the motor cannot be touched
while the unit is active.
■Only remove the dust cover just before you install
the air ducts.
■If necessary install a silencer directly onto the
supply air and extract air connections and ensure
it is straight.
■Do not install a flexible air duct system. These
will disturb the basic operating principle of the
balanced ventilation system. When a semi-rigid
air duct system is desired only use a Zehnder
approved system. Any other semi-rigid air duct
will disturb the basic operating principle of the
balanced ventilation system.

EN - 15
■The distance (E) between the opening of the
outdoor air duct (A) and the opening of the
exhaust air duct (B) must be at least 1.5 m.
■The position of the outdoor air opening (A) relative
to other possible sources of stale air is very
important (other exhaust-air outlets, street versus
garden, etc.).
■Install thermal and vapour resistant insulation (C)
to the exhaust air duct (B) from the unit to the end
of the air duct.
■Install thermal and vapour resistant insulation
to the outdoor air duct (A) from the unit up to
the roof/wall. This prevents the formation of
condensation on the outside of the ducts.
■Drain the exhaust duct (D) in the direction of the unit.
■Zehnder recommends that you fit thermal and
vapour resistant insulation to the supply duct from
the unit up to the supply valves and or grilles. This
will prevent unnecessary temperature loss in the
summer and winter.
■Make sure the inside of the air ducts do not have
an obstruction of any sort. Air ducts must not
have sharp bends, dents or long screws inside.
Obstructions will compromise the performance
and maintenance of the system.
■Install the air duct with as little air resistance as
possible and free from air leakage.
Size
350 160 mm
450 180 mm
600 200 mm
Legend
Code Meaning
ODA Outdoor air
SUP Supply air
ETA Extract air
EHA Exhaust air
R Supply and extract air on the right side
L Supply and extract air on the left side
ODA
EHA ETA
SUP
R
ODA
EHAETA
SUP
L

16 - EN
5.5 Installation of the valves and/or grilles
Example valve Example grille
■Install supply and extract valves and/or supply
and extract grilles (e.g. in an open living kitchen)
at least 750 mm from each other. This will prevent
the supply air short circuiting with the extract air;
T minimal = 750 mm
■Install supply and extract valves and/or supply
and extract grilles at least 350 mm from the wall,
ceiling or floor next to it. If the valves and/or grilles
are installed closer to the wall, ceiling or floor next
to it use clean sector valves and/or grilles or an air
blocker on the side of the wall, ceiling or floor next
to it. This will keep the wall, ceiling or floor next to
it clean;
T minimal = 350 mm
■To ensure good transfer of air throughout the
dwelling, there should be a grille or gap near the
inside doors. This is equivalent to:
- A gap under the inside doors of minimum area
7600 mm2above the floor finish;
- A gap under the inside doors of at least 10mm
for a standard 760 mm width door.
Do not obstruct these openings. For instance
with furniture, draught excluders or deep pile
carpet, as the airflow in the house will stagnate.
For the best comfort it is recommended that you
install the ventilation system with supply and extract
valves made by Zehnder.

EN - 17
6 Available operating devices
Appearance
Example
Name Remark
Unit display For manual and automatic control of the unit. The automatic control is based on the unit
settings and adjustable scheduler.
Zehnder ComfoSense C 67 You can connect the ComfoSence C directly to the unit via a ComfoNet connection.
Zehnder ComfoSwitch C 67 You can connect the ComfoSwitch C directly to the unit via a ComfoNet connection.
Zehnder ComfoControl App The ComfoControl App is available for Android and IOS devices.
An installed ComfoConnect LAN C is necessary to use the ComfoControl App.
Zehnder Timer RF A connected ComfoSense C is necessary to use the Timer RF.
Zehnder CO2sensor A connected option box is necessary to translate the signal from the CO2sensor.
Bathroom switch A connected option box is necessary to use the bathroom switch.

18 - EN
7 Optional ancillaries
Appearance
Example
Name Remark
Zehnder ComfoSplitter You can connect the ComfoSplitter directly to the unit via a ComfoNet connection.
Zehnder ComfoConnect
KNX C
You can connect a ComfoConnect KNX C directly to the unit via a ComfoNet connection.
Zehnder ComfoConnect
LAN C
You can connect a ComfoConnect LAN C directly to the unit via a ComfoNet connection.
The Zehnder ComfoConnect LAN C is also available in a portable version for the service
engineer. All required cables are supplied in the transport case.
Zehnder ComfoCool Q600 You can connect the ComfoCool Q600 directly to the unit via a ComfoNet connection.
You do need a separate power supply for the ComfoCool Q600.
Zehnder Option box You can connect the option box directly to the unit via a ComfoNet connection.
You only need a separate power supply for the option box when you connect ancillaries to
the option box which require a 230V supply from the option box.
Zehnder ComfoFond-L Q A connected option box is necessary to control the ComfoFond-L Q.
You do need a separate power supply for the option box.
Zehnder ComfoAir Q
pre-heater
You can install the pre-heater on site into the unit.
Post-heater A connected option box is necessary to control the post-heater.
You do need a separate power supply for the post-heater.
Only install a post-heater with a SELV
(Safety Extra Low Voltage) 0-10V connection
and own temperature safety control.
External filter A connected option box is necessary to use an external filter error sensor.
Error contact / message A connected option box is necessary to transmit an error signal.
Standby switch A connected option box is necessary to use the standby switch.
Zehnder RF-PCB You can install the RF-PCB on site into the unit.

ZGNL_Manual_10000065356_40014857, V0322, EN, Subject to change
Zehnder Group UK Limited
Concept House, Watchmoor Point
Camberley, Surrey • GU15 3AD
T [phone]
[e-mail] • www.zehnder.co.uk