Zehnder Rittling ComfoAir 350 User manual

I - EN
ComfoAir 350
User manual

EN - II
All rights reserved.
This manual 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 manual. In case of disputes the Dutch version of these instructions will
be binding.

III - EN
Table of Contents
Preface ............................................................................................................................................................. 1
1 INTRODUCTION ............................................................................................................................................. 1
1.1 Guarantee and liability .......................................................................................................................... 1
1.1.1 General...................................................................................................................................... 1
1.1.2 Guarantee conditions............................................................................................................... 1
1.1.3 Liability...................................................................................................................................... 1
1.2 Safety ................................................................................................................................................... 2
1.2.1 Safety regulations..................................................................................................................... 2
1.2.2 Safety provisions and measures.............................................................................................. 2
1.2.3 Pictograms used....................................................................................................................... 2
2 FOR THE USER............................................................................................................................................... 3
2.1 Glossary ................................................................................................................................................ 3
2.1.1 Balanced ventilation................................................................................................................. 3
2.1.2 Heat recovery............................................................................................................................ 3
2.1.3 Bypass for free cooling ............................................................................................................ 3
2.1.4 Frost protection ........................................................................................................................ 3
2.1.5 Open fire programme ............................................................................................................... 3
2.1.6 Wireless (RF) control (optional)................................................................................................ 3
2.1.7 Preheater element (optional).................................................................................................... 3
2.1.8 Enthalpy (optional).................................................................................................................... 3
2.2 Available operating devices .................................................................................................................. 4
2.2.1 Display ...................................................................................................................................... 4
2.2.2 3-position switch ...................................................................................................................... 4
2.2.3 Bathroom switch ...................................................................................................................... 5
2.3 P menus for the user............................................................................................................................ 6
2.4 Maintenance by the user....................................................................................................................... 8
2.4.1 Cleaning or replacing the filters............................................................................................... 8
2.4.2 Cleaning the valves (in your dwelling) ..................................................................................... 8
2.5 Malfunctions.......................................................................................................................................... 9
2.5.1 Malfunction alerts on digital operating devices...................................................................... 9
2.5.2 3-position switches with malfunction indicator ...................................................................... 9
2.5.3 What to do in the event of a malfunction ................................................................................ 9
2.6 End of useful life.................................................................................................................................... 9
3. EEC declaration of conformity ................................................................................................................... 10

EN - IV

1 - EN
Preface
Carefully read this manual before use.
This manual provides all the information required
for safe and optimal operation of the ComfoAir 350.
It is also intended as a reference for servicing, so
that this can be carried out in a responsible manner.
The device is subject to continuous development
and improvement. As a result, the ComfoAir 350
may slightly differ from the descriptions.
NOTE
This manual has been compiled with
the utmost care. However, no rights can be
derived from it. In addition, we at all times
reserve the right to change the contents of
this manual, without prior notice.
1 Introduction
The device's name is ComfoAir 350 . In the follow-
ing it will be referred to as ComfoAir.
The ComfoAir is a balanced ventilation system with
heat recovery in order to create healthy, balanced
and energy-efficient ventilation in houses. The
ComfoAir has a CE marking on the identification
plate. The identification plate can be found on top
of the ComfoAir.
1.1 Warranty and liability
1.1.1 General
The sales and warranty conditions for companies in
the metal, plastic and technology industries, which
apply to the ComfoAir, have been deposited with
the Clerk of the District Courts of the Hague on 19th
October 1998, under number 119/1998.
1.1.2 Guarantee conditions
The ComfoAir is covered by a manufacturer’s war-
ranty for a period of 24 months after fitting up to
a maximum of 30 months after the date of manu-
facture. Warranty claims may only be submitted for
material faults and/or construction faults arising
during the warranty period. In the case of a war-
ranty claim, the ComfoAir must not be dismantled
without written permission from the manufacturer.
Spare parts are only covered by guarantee, 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 lters;
• Parts are used that have not been supplied by
the manufacturer;
• Non-authorised changes or modifications have
been made to the unit.
1.1.3 Liability
The ComfoAir has been designed and manufac-
tured for use in “balanced ventilation systems”. Any
other use is deemed unintended use and can lead
to damage to the ComfoAir or personal injury, for
which the manufacturer cannot be held liable.
The manufacturer is not liable for any damage origi-
nating from:
• Non-compliance with the safety, operating and
maintenance instructions in this manual;
• The use of components not supplied or recom-
mended by the manufacturer.
Responsibility for the use of such components
lies entirely with the installer;
• Normal wear and tear.

EN - 2
1.2 Safety
1.2.1 Safety regulations
Always comply with safety regulations in this man-
ual. Non-compliance with the safety regulations,
warnings, notes and instructions in this manual can
cause personal injury or damage to the ComfoAir.
• The ComfoAir may only be installed, connected,
rendered operational and maintained by an ap-
propriately approved installer, unless otherwise
indicated in this manual;
• Installation of the ComfoAir must be carried out
in accordance with the general and locally ap-
plicable construction, safety and installation
instructions of the local council, electricity and
water boards or other agencies;
• Observe the safety regulations, warnings, com-
ments and instructions as prescribed in this
manual at all times;
• Keep this manual with the ComfoAir throughout
its life;
• Instructions with regard to cleaning or replacing
the filters of the intake and exhaust valves must
be carefully observed;
• The specifications stated in this document may
not be changed;
• Modifying the ComfoAir is not allowed;
• The ComfoAir is only suitable for connetion to
230V 50Hz mains;
• It is recommended to take out a maintenance
contract so that the device is checked on a
regular Basic. The supplier can provide a list of
registered installers nearby.
1.2.2 Safety provisions and measures
• The ComfoAir cannot be opened without using
tools;
• It should not be possible to touch the fans,
therefore ducting must be connected to the
ComfoAir at a minimum duct length of 900mm.
1.2.3 Pictograms used
The following pictograms are used in this manual:
Point of attention.
Risk of:
- damage to the device;
- performance of the device is compro-
mised if instructions are not observed
carefully.
Risk of personal injury to the user or
installer.

3 - EN
2 For the user
Congratulations, you are the owner of a
ComfoAir 350 ,
an heat recovery unit from Zehnder.
We wish you lots of comfort.
2.1 Glossary
The ComfoAir features:
• Balanced ventilation;
• Heat recovery;
• Bypass for free cooling;
• Frost protection;
• Open re programme;
• Wireless (RF) control (optional)
• Preheater element (optional);
• Enthalpy (optional).
A concise explanation of these concepts/features is
given in the paragraphs below.
2.1.1 Balanced ventilation
The ComfoAir is a balanced ventilation system. Bal-
anced 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 bed-
rooms. Gaps under or near the doors ensure a good
through-flow in the dwelling. The air circulation is
in balance.
Ensure that these gaps are never obstructed
by draught excluders or deep-pile carpet, for
example. Otherwise the system will not func-
tion optimally.
A balanced ventilation system consists of:
• ComfoAir (A);
• Duct system for the supply of outdoor air (B)
and 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).
B
A
C
E
D
D
D
D
E
E
2.1.2 Heat recovery
Besides ensuring a healthy balance between in-
coming and outgoing air, the ComfoAir also pro-
vides the benefits of heat recovery. Heat recovery
means that heat from the extracted air is transferred
to the fresh, and usually colder, air from outside the
building.
2.1.3 Bypass for free cooling
The bypass is often used during hot days in the
summer season. By allowing colder outside air in at
night, the indoor temperature of the dwelling can be
kept low during hot days. The bypass works auto-
matically: simply set the required comfort tempera-
ture.
2.1.4 Frost protection
The ComfoAir is also fitted with a frost protection
device. This is an automatic protective system that
temporarily reduces (or even briefly stops) the sup-
ply of outdoor air to the ComfoAir if there is a risk
of freezing in the ComfoAir. This can occur in the
event of moderate to sharp frost during the winter
months.
2.1.5 Openreprogramme
The ComfoAir is fitted with an Open fire programme.
The Open fire programme is used in houses that
have a fireplace, as there is a risk of air being
sucked back from the chimney. The Open fire pro-
gramme works automatically but requires activation
by the installer.
While the Open re programme is activated the
supply and exhaust fan can not be turned off ma-
nually.
2.1.6 Wireless (RF) control (optional)
It is possible to set the ventilation positions of the
ComfoAir with one or more wireless switches. To do
this the ComfoAir needs a build in RF module.
2.1.7 Preheater element (optional)
Fitting the optional Preheater element in the Com-
foAir gives the added bonus that balanced venti-
lation remains intact for longer. In that case, the
supply of cold outside air no longer needs to be re-
duced (so soon). The Preheater element is activated
and deactivated automatically.
2.1.8 Enthalpy (optional)
It is possible to fit the ComfoAir with an enthalpy
exchanger. An enthalpy exchanger helps to regulate
humidity levels in the dwelling. In addition to heat
recovery, the enthalpy exchanger also ensures
moisture recovery. Moisture recovery means that
moisture from extracted air is transferred to the
supply air sourced from outside the dwelling. An en-
thalpy exchanger is also less sensitive to freezing.

EN - 4
2.2 Available operating elements
The ComfoAir is fitted with the following operating
elements:
• Display on the unit;
• 3-position switch;
• 3-position switch with malfunction indicator;
• Wireless 3-position switch;
• Wireless 3-position switch with malfunction
indicator;
• Bathroom switch to temporarily select the
highest ventilation position.
A concise explanation of these operating elements
is given in the paragraphs below.
2.2.1 Display on the unit
The ComfoAir can be operated by means of a digi-
tal display which is mounted on the unit.
select menu up
OK down
supply off supply on
(led green) (led green)
comfort temperature
Shown in display
Ventilation setting absent
Ventilation setting low
Ventilation setting medium
Ventilation setting high
Menu symbol
Malfunction code (flashes)
Bypass
Access to the menus
Se-
quence
Press Display Description
1 MENU P2 Time delay
2s P9 Status
3sP1 Status
Example
Setting bathroom switch delay
Se-
quence
Press Display Description
1 MENU P2 Time delay
2 OK P21 Activation delay
3sP22 Select 22
4 OK 30 Current setting
5
▼(10 x or
press and
hold)
20 Select 20
6 OK P22 Sets the value to 20
7 MENU P2
8 MENU 1 Fan setting
Only in the P2 menus settings can be made.
The other P-menus (P1 and P9) can only be
read.
Leaving Reading menu
• At action point 6 press "MENU" (instead of "OK").
The display can not be used for setting the
ventilation positions of the ComfoAir. The
arrow keys are only for setting the additio-
nal programmes.
2.2.2 3-position switch
A 3-position switch can be used to set the venti-
lation positions of the ComfoAir. One or multiple
3-position switches can be fitted in the house (e.g.
in the kitchen). The following types of switches can
be used:
• Type 1 g Standard 3-position switch;
• Type 2 g3-position switch with malfunction and
lter alerts indicator;
• Type 3 gWireless 3-position switch (RF)
• Type 4 gWireless 3-position switch (RF) with
malfunction and lter alerts indicator;
An wireless 3-position switch need to be
retuned to the ComfoAir if a General Reset
is given.
3
2
1
Type 1 Type 2 Type 4
OK
MENU
·
·
·
OK
MENU
·
·
·
OK
MENU
·
·
·
OK
MENU
·
·
·
1
A
2
3
X X
X X
•
OK
MENU
·
·
·
1
A
2
3
X X
X X
•
1
A
2
3
X X
X X
•
1
A
2
3
X X
X X
•
1
A
2
3
X X
X X
•
1
A
2
3
X X
X X
•
1
A
2
3
X X
X X
•

5 - EN
Setting the ventilation using
3-position switch(es)
A 3-position switch can be used to set 3 different
ventilation positions.
• Position 1 gLow.
- Use for low ventilation levels.
• Position 2 Normal.
- Use when present and no ex-
tra ventilation is needed.
• Position 3  High.
- Use during cooking, shower-
ing and when additional ventila-
tion is needed.
• Timer Temporary High
- Use during cooking, sho-
wering and when additional
ventilation is needed for a short
time.
The wireless 3-position switches have an sepera-
ted button for the Timer. After the timer delay the
ComfoAir will return to the ventilation setting which
was active before the timer function was activated.
To use the Timer function with a wired 3-position
switch choose setting 3 and immediately return to
the setting you want after the timer delay.
If multiple position switches are available in
the house, the ComfoAir will switch to the
highest ventilation setting unless overruled by
an automated software programme.
2.2.3 Bathroom switch
A bathroom switch can be used to temporarily set
the ComfoAir in the highest ventilation level. This
switch is mostly fitted in the bathroom to extract
any excess moisture after showering, as soon as
possible. The bathroom switches vary widely in
model and are therefore not illustrated here. If re-
quired, the bathroom switch can be turned on and
off using a time delay entered via a digital operating
device.
Delay timer
This ensures that the ComfoAir does not switch on
at the highest setting when activated, but first waits
for the delay timer to run its course.
If the bathroom switch is deactivated during
the delay timer period, then the ComfoAir
will remain at its current ventilation setting
and not switch to the highest setting.
The delay timer does not work with all types
of bathroom switches (e.g. pulse switches).
In that case, leave the delay timer at 0.
Overrun timer
This ensures that the ComfoAir does not switch
back to the normal (or previous) setting when de-
activated, but first waits for the overrun timer to run
its course. Once the programmed overrun timer is
complete, the ComfoAir returns to the normal (or
previous) ventilation setting.
If the bathroom switch is turned off within
the programmed delay timer period, then the
overrun function will be terminated.
Light switch
The functions of the bathroom switch can also be
integrated into a light switch.

EN - 6
2.3 P menus for the user
Menu P1 ¨Status of programmes
Status
Sub-
menu Description Activated
P11 Is menu 21 currently active? Yes (1) / No (0)
P12 Is menu 22 currently active? Yes (1) / No (0)
P13 Is menu 23 currently active? Yes (1) / No (0)
P14 Is menu 24 currently active? Yes (1) / No (0)
P15 Is menu 25 currently active? Yes (1) / No (0)
P16 Is menu 26 currently active? Yes (1) / No (0)
Menu P2 ¨Setting time delays
Time delay values
Sub-menu Description Minimum Maximum General
Reset
P21
(Optional)
Note:
Only applies to systems
ttedwithacordedswitch
and a second switch in the
bathroom.
Delay timer for the bathroom switch (to
switch to high position).
• 'x' minutes after operating the bathroom
switch, the ComfoAir switches to the
high setting.
- Low voltage input
0 Min. 15 Min. 0 Min.
P22
(Optional)
Note:
Only applies to systems
ttedwithacordedswitch
and a second switch in the
bathroom.
Overrun timer for the bathroom switch (to
switch to normal position).
• 'x' minutes after operating the bathroom
switch, the ComfoAir switches back to
the normal setting.
- Low voltage input
0 Min. 120 Min. 30 Min.
P23
(Optional)
Note:
Only applies to systems
ttedwithahardwired
3-position switch.
Overrun timer for ventilation position 3 (us-
ing a wired 3-position switch).
• If ventilation setting 3 (high) is switched
on briefly (< 3 sec), the ComfoAir will
switch to the high setting for 'x' minutes
and then automatically returns to the
normal setting.
If any 3-position switch is operated during
this lagging time the ComfoAir will instant-
ly revert to the ventilation position as set
at that time.
0 Min. 120 Min. 0 Min.
P24 Filter warning
• 'x' weeks after cleaning the lters the
"filter dirty" alert will reappear.
10 weeks 26 weeks 16
weeks

7 - EN
Time delay values
Sub-menu Description Minimum Maximum General
Reset
P25
Note:
Onlyappliestosystemst-
ted with an RF switch.
Overrun timer for ventilation setting 3 (us-
ing " ").
• After pressing " " briey (< 2 sec.),
the ComfoAir will switch to the high set-
ting for ‘x’ minutes and then automati-
cally returns to the normal setting.
If any 3-position switch is operated during
this lagging time the ComfoAir will instant-
ly revert to the ventilation position as set
at that time.
1 Min. 20 Min. 10 Min.
P26
Note:
Onlyappliestosystemst-
ted with an RF switch.
Overrun timer for ventilation setting 3 " us-
ing ".
• After pressing " " continuously (> 2
sec.), the ComfoAir will switch to the
high setting for ‘x’ minutes and then au-
tomatically returns to the normal setting.
If any 3-position switch is operated during
this lagging time the ComfoAir will instant-
ly 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.
Menu P9 ¨Status of programmes (from menu P5 and P6 additional programmes)
Status
Sub-menu 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 or Preheater active? Yes (1) / No (0)
P97 Enthalpy programme active? Yes (1) / No (0)

EN - 8
2.4 Maintenance by the user
The following maintenance must be carry out by the
user:
• Cleaning or replacing the lters;
• Cleaning the valves (in the dwelling).
A concise explanation of these maintenance activi-
ties is given in the paragraphs below.
Failure to carry out (periodic) maintenance
on the ComfoAir ultimately compromises the
performance of the ventilation system.
2.4.1 Cleaningorreplacingthelters
If so indicated on the digital operating device, you
must clean or replace the filters.
Replace the lters (at least) every six
months and clean the lters every 2 or 3
months.
You will see the message “FiL” and ”tEr” appearing
alternately on the display.
To replace ...
1. Press “OK” on the display for at least 4 sec-
onds until the filter warning disappears.
2. Disconnect the power from the ComfoAir.
3. Remove the handles (A) from the ComfoAir
%
$$
(
$$
)
4. Remove the old filters (B) from the ComfoAir
%
$$
(
$$
)
5. Slide the new filters back into the ComfoAir.
6. Refit the handles (A) to the ComfoAir.
7. Reconnect the power to the ComfoAir.
Take care not to damage the lter material
with the outer ends of the lter holders.
To clean...
Vacuum the filters (B) with a vacuum cleaner in-
stead of replacing them with new filters.
When using the ComfoAir for the rst time,
it is recommended to clean the lters (and
valves) rst. During the construction phase
the ventilation system could have become
dirty with building dust.
2.4.2 Cleaning the valves (in your dwelling)
The ventilation system may be fitted with the fol-
lowing valves:
Exhaust valve (STB) Exhaust valve (STC)
Exhaust valve (STV) Exhaust valve (STK) Supply valve (STH)
Exhaust valve (STB) Exhaust valve (STC)
Exhaust valve (STV) Exhaust valve (STK)
Supply valve (STH)
Exhaust valve (STB) Exhaust valve (STC)
Exhaust valve (STV) Exhaust valve (STK)
Supply valve (STH)
You must 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.
About the valve settings...
The ventilation air is supplied and discharged by
means of valves. Gaps near doors in the dwelling
ensure that the air flows in the right direction. In or-
der to ensure that the correct ventilation volumes
are maintained in the rooms, the following must be
observed:
• Do not seal the gaps;
• Do not change the settings of the valves;
• Do not replace the valves with one another.
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.
After cleaning, make sure that all valves are
placed back with the same setting (and in
exactly the same ventilation hole in the wall
or ceiling) AT ALL TIMES. Otherwise, system
performance will be compromised.

9 - EN
2.5 Malfunctions
Malfunctions in the ComfoAir are reported as fol-
lows:
• The malfunction alert appears on the display.
• The malfunction indicator on the 3-position
switch lights up;
A concise explanation of methods of reporting mal-
functions is given in the paragraphs below.
2.5.1 Malfunction alerts on the digital
operating device
In the event of a malfunction, the corresponding
malfunction code will be displayed on the digital
operating device of the ComfoAir. Please refer to
the malfunction overview to find out the meaning of
the relevant malfunction alert.
2.5.2 3-position switch with malfunction
indicators
The 3-position switches that are fitted with a mal-
function indicator show when a malfunction or filter
dirty alert has occurred. Depending on the type of
the 3-position switch, this is done in one of the fol-
lowing two ways:
• 3-position switch with malfunction indicator.
In the event of a malfunction or filter dirty alert
the indicator lights up;
• Wireless 3-position switch with malfunction in-
dicator.
The malfunction indicators will light up once
this 3-position switch is used. One indicator
will light up green to indicate communication
has been established. Subsequently, in the
event of a malfunctionor filter dirty alert both
indicators will flash red 3 times. After that, both
indicators will light up green once more.
2.5.3 What to do in the event of a malfunction
In the event of a malfunction, contact the installer.
Note down the malfunction code that appears on
the digital operating device. Make a note of your
ComfoAir type. This is given on the identification
plate on the top of the ComfoAir. The system should
not be disconnected from the power supply, unless
the ComfoAir must be taken out of service due to
a serious malfunction, or for filter cleaning/replace-
ment or any other compelling reasons.
If the ComfoAir 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. Long-term deactivation of the Comfo-
Air must therefore be prevented.
If the ComfoAir is installed in an area with a
higher average humidity (such as bathroom
or toilet) the probability of condensation on
the outside of the ComfoAir is high. This is a
normal phenomenon, similar to condensation
on a window, on which no action is needed.
2.6 End of useful life
Consult with the supplier about what should be
done with the ComfoAir at the end of its useful life.
If the ComfoAir cannot be returned to the supplier,
avoid disposing of it with the domestic waste, and
ask your local council about the options for recy-
cling 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 lo-
cations.

EN - 10
3 EEC declaration of conformity
Zehnder Group Nederland B.V.
Lingenstraat 2
8028 PM Zwolle-NL
Tel.: [phone]
Fax: [phone]
Company register Zwolle 05022293
EEC declaration of conformity
Machine description : Heat recovery units: ComfoAir 350 series
Complies with the following directives : Machinery Directive (2006/42/EEC)
Low Voltage Directive (2006/95/EEC)
EMC Directive (2004/108/EEC)
Zwolle, 5 January 2010
Zehnder Group Nederland B.V.
E. van Heuveln,
Managing Director

11 - EN

Zehnder Group Nederland B.V.
Lingenstraat 2
8028 PM Zwole
Nederland
Tel.: [phone]
Fax.: [phone]
Internet: www.jestorkair.nl
E-mail: [e-mail]
© Zehnder Group Nederland B.V. 849050655-0711