Zehnder Rittling ComfoAir 350 User manual

ComfoAir 350
Manual

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.

Table of Contents
1 INTRODUCTION ............................................................................................................................................. 1
1.1 Preface ................................................................................................................................................. 1
1.2 CE marking .......................................................................................................................................... 1
1.3 Guarantee and liability........................................................................................................................ 1
1.3.1 Guarantee conditions............................................................................................................... 1
1.3.2 Liability...................................................................................................................................... 1
1.4 Safety .................................................................................................................................................. 2
1.4.1 Safety regulations..................................................................................................................... 2
1.4.2 Safety provisions and measures.............................................................................................. 2
1.4.3 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 Chimney sweep programme.................................................................................................... 3
2.2 Available operating devices ............................................................................................................... 4
2.2.1 Display ...................................................................................................................................... 4
2.2.2 3-position switch ...................................................................................................................... 4
2.2.3 Bathroom switch ...................................................................................................................... 4
2.3 Maintenance by the user.................................................................................................................... 8
2.3.1 Cleaning or replacing the filters............................................................................................... 8
2.3.2 Cleaning the valves (in your dwelling) ..................................................................................... 8
2.4 Malfunctions........................................................................................................................................ 9
2.4.1 Malfunction alerts on digital operating devices...................................................................... 9
2.4.2 3-position switches with malfunction indicator ...................................................................... 9
2.4.3 What to do in the event of a malfunction ................................................................................ 9
2.5 End of useful life.................................................................................................................................. 9
Contents III

3. FOR THE INSTALLER ................................................................................................................................... 10
3.1 ComfoAir............................................................................................................................................ 10
3.2 Technical specifications ................................................................................................................... 11
3.3 Dimension sketch ............................................................................................................................. 13
3.4 Installation conditions ...................................................................................................................... 14
3.5 Installation of the ComfoAir ............................................................................................................. 14
3.5.1 Transport and unpacking ....................................................................................................... 14
3.5.2 Checking the delivery............................................................................................................. 14
3.6 Wall mounting.................................................................................................................................... 14
3.6.1 Connection of the air ducts.................................................................................................... 15
3.6.2 Connection of the condensation drain .................................................................................. 15
3.7 Commissioning the ComfoAir.......................................................................................................... 16
3.7.1 Display on the unit.................................................................................................................. 16
3.8 Programming air specifications ...................................................................................................... 20
3.9 Maintenance by the installer............................................................................................................ 20
3.9.1 Inspecting the heat exchanger and fans ............................................................................... 21
3.10 Malfunctions...................................................................................................................................... 22
3.10.1 Malfunction alerts on the digital operating device ...............................................................22
3.10.2 Trouble shooting..................................................................................................................... 23
3.10.3 Malfunctions (or problems) without alarms........................................................................... 25
3.11 Service parts...................................................................................................................................... 26
3.12 Wiring diagram: ComfoAir 350 Basic – LEFT-HAND version......................................................... 27
3.13 Wiring diagram: ComfoAir 350 Basic – RIGHT-HAND version ...................................................... 28
3.14 ComfoAir 550 installation measuring report...................................................................................29
IV Contents

1
Introduction 1
1 Introduction
This chapter provides general information on the ComfoAir.
1.1 Preface
In addition to this general chapter, this manual con-
sists of:
• A part for the user,
• A part for the installer.
Carefully read this manual
before use.
- User Chapters 1 and 2.
- Installer Chapters 1 and 3.
This manual provides all the information required
for safe and optimal installation, operation and
maintenance of the ComfoAir. 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.
1.2 CE marking
The device's name is ComfoAir 350. In the following
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 identification plate is shown below.
1.3 Warranty and liability
1.3.1 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 filters;
• Parts are used that have not been supplied by
the manufacturer;
• Non-authorised changes or modifications have
been made to the unit.
1.3.2 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.
Voltage Hertz
Current
Power
Capacitor
Phase
Articlecode
Type
Serial number
Protecion class Insolation class

1
2 Introduction
1.4 Safety
1.4.1 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 electrical installation of the ComfoAir may
only be performed by a qualified electrician in
accordance with Part P of the Building Regula-
tions;
• 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 such as the GIW
(Dutch Home Warranty Institute);
• 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 not suitable for connection to
the three-phase mains;
1.4.2 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.
1.4.3 Pictograms used
The following pictograms are used in this manual:
Point of attention.
Risk of:
- damage to the device;
- personal injury to the user, or;
- performance of the device is compro-
mised if instructions are not observed
carefully.

2 For the user
This chapter describes how to operate the ComfoAir.
For the user 3
2
2.1 Glossary
The ComfoAir features:
• Balanced ventilation;
• Heat recovery;
• Bypass for free cooling;
• Frost protection;
• Chimney sweep programme;
• Reheater (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.
Balanced ventilation means that pollutants from
the kitchen, the bathroom, the toilet(s) and possi-
bly the storage room are extracted, while the same
amount of fresh air is blown into the living room and
bedrooms. Gaps under 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
F
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 au-
tomatically. All you have to do is set the required
comfort temperature.
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 Chimney sweep programme
The ComfoAir is fitted with an Chimney sweep pro-
gramme. The Chimney sweep programme is used in
houses that have a fireplace, as there is a risk of air
being sucked back from the chimney. The Chimney
sweep programme works automatically but requires
activation by the installer. While the Chimney sweep
programme is activated the supply and exhaust fan
can not be turned off manually.

2.2 Available operating elements
The ComfoAir can be fitted with the following oper-
ating elements:
• Display on the unit;
• 3-position switch;
• Wireless 3-position switch;
• 3-position switch with malfunction indicators;
• 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 digital
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
2▲ P9 Status
3▲P1 Status
Example
Setting bathroom switch delay
Se-
quence
Press Display Description
1 MENU P2 Time delay
2 OK P21 Delay timer
3▲P22 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
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 JStandard 3-position switch;
• Type 2 J3-position switch with LED
for malfunction and filter alerts;
• Type 3 JWireless 3-position switch with
LED for malfunction and filter indication.
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.
Setting the ventilation using
3-position switch(es)
A 3-position switch can be used to set 3 different
ventilation positions.
• Position 1 JLow.
- Use for low ventilation levels.
• Position 2 Normal.
- Use if you require normal ven-
tilation.
• Position 3 High.
- Use this position during cook-
ing, showering and when addi-
tional ventilation is needed.
3
2
1
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 required, the bathroom switch can be turned on
and off using a time delay entered via a digital op-
erating 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.
2
4 For the user
MENU
A
OK
2
3
X X
X X
1
•

2
5For the user
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).
Overrun timer
This ensures that the ComfoAir does not switch back
to the default (or preprogrammed) 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 default (or
preprogrammed) ventilation setting.
If the bathroom switch is turned off within
the programmed overrun 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.

2
6 For the user
Menu P1 Status of programmes
Ventilation programmes
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 Mini-
mum
Maxi-
mum
Default
P21
(Optional)
Note:
Only applies to systems fit-
ted with a corded switch
and a second switch in the
bathroom.
- Low voltage input
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.
0 Min. 15 Min. 0 Min.
P22
(Optional)
Note:
Only applies to systems fit-
ted with a corded switch
and a second switch in the
bathroom.
- Low voltage input
Overrun timer for the bathroom
switch (to switch to normal posi-
tion).
• 'x' minutes after operating the
bathroom switch, the ComfoAir
switches back to the NORMAL SET-
TING.
0 Min. 120 Min. 30 Min.
P23
(Optional)
Note:
Only applies to systems fit-
ted with a hardwired switch.
Overrun timer for ventilation position
3.
• If ventilation setting 3 (high) is
switched on briefly (< 3 sec), the
ComfoAir remains at ventilation
setting 3 in accordance with the
time set in this menu.
If the position switch or RF remote
control is operated during this lag-
ging time, the ComfoAir will instantly
revert to the ventilation position as
set at that time.
0 Min. 120 Min. 0 Min.
P24 Filter warning
• Here the user can indicate when
the “FILTER DIRTY” alert must ap-
pear.
10 weeks 26 weeks 16
weeks