Zehnder Rittling ComfoAir 180 User manual

Cooling Fresh Air Clean AirHeating
Ventilation system
ComfoD 180 and ComfoAir 180
Manual for the commisioning and service engineer
ComfoD / Basic ComfoAir / Luxe

2 - EN
Foreword
Read this document carefully before use.
This document provides all the information required
for safe and optimal installation of the ComfoD 180
and ComfoAir180. In this document they will be
referred to as “the unit”.
The unit is subject to continuous development and
improvement. As a result, the unit may slightly differ
from the descriptions.
The following pictograms are used in this
document:
Point of attention.
Risk of:
- damage to the device;
- performance of the device is compromised if
instructions are not observed carefully.
Risk of personal injury for the user.
Maintenance
Questions
Please contact the supplier if you have any questions
or would like to order a new document or new filters.
The contact details of the main supplier(s) can be
found in the user manual.
The contact details of the manufacturer can be found
in the back of this document.
The following information can be found in the
user manual:
User Information
General information about the ventilation system.
Operating devices available for the unit.
Warranty and liability conditions.
EEC declaration of conformity.
How to maintain the filters of the unit.
How to maintain the valves of the ventilation system.
The following information can be found on the
identification plate:
Meaning of the suffixes
ComfoAir Product family name.
ComfoD The unit has a display installed as default.
180 Product type name.
(Air volumes in m3/h)
Luxe The unit has no display.
Enthalpie The unit has an enthalpy exchanger installed
as default.
ERV The unit has an enthalpy exchanger installed
as default.
PH The unit has a pre heater installed as default.
VThe unit has a pre heater installed as default.
All rights reserved.
This documentation has been compiled with the utmost care. The publisher cannot be held liable for any damage
caused as a result of missing or incorrect information in this document. In case of disputes the English version of
these instructions will be binding.

2 - EN
EN- 3
Table of Contents
Foreword ..........................................................................................................................................................................2
1 Safety ........................................................................................................................................................................ 5
2 P-menus ................................................................................................................................................................... 5
2.1 P- menus for the user. .........................................................................................................................................6
2.2 P-menus for the installer .....................................................................................................................................7
3 Commissioning ....................................................................................................................................................... 10
3.1 Programming air specifications ......................................................................................................................... 10
3.2 Time delays ....................................................................................................................................................... 12
3.2.1 Bathroom switch (P21 and P22) .............................................................................................................. 12
3.2.2 SA 1-3V / SA 0-3V / CCB: Wired position switch (P23) ............................................................................ 12
3.2.3 RFZ: Wireless position switch (P25 and P26) .......................................................................................... 12
3.2.4 ComfoSense (P27) .................................................................................................................................. 12
3.3 Frost protection (P52) ........................................................................................................................................ 13
3.4 Fire place program (P50) ................................................................................................................................... 13
3.5 Enthalpy exchanger (P59) .................................................................................................................................. 13
4 Technical specifications ........................................................................................................................................ 14
4.1 Service parts .............................................................................................................................................. 15
4.2 Dimension sketch .............................................................................................................................................. 16
4.3 Wiring diagram .................................................................................................................................................. 18
5 Maintenance
4.3 Wiring diagram
....................................................................................................................................................20
5.1 Condensation drain .................................................................................................................................... 21
5.2 Air ducts ..................................................................................................................................................... 21
5.3 Casing ........................................................................................................................................................ 22
5.4 Heat exchanger ..........................................................................................................................................22
5.5 Fans
5.4 Heat exchanger
........................................................................................................................................................... 23
6 Malfunctions ........................................................................................................................................................... 24
6.1 Malfunction alerts on the display ....................................................................................................................... 25
6.2 Malfunction alerts on the ComfoSense.............................................................................................................. 25
6.3 Malfunction alerts on the RFZ ........................................................................................................................... 25
6.4 Read-out software ............................................................................................................................................. 25
6.5 What to do in the event of a malfunction / troubleshooting ............................................................................... 26
6.6 Malfunctions (or problems) without alerts.......................................................................................................... 29

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4 - EN
EN- 5
1 Safety
Always follow the safety regulations, warnings,
comments and instructions given in this document.
Personal injury or damage to the unit can arise
from non-compliance with the safety regulations,
warnings, comments and instructions in this
document.
■ Only a certified engineer may fit, connect,
commission and maintain the unit unless
otherwise indicated in this document;
■ Installation of the unit must be carried out
in accordance with the general and locally
applicable construction, safety and installation
instructions of the local council, electricity and
water boards or other agencies;
■ The unit is only suitable for a 230V 50/60Hz
connection;
■ The unit is only suitable for residential use and
not for industrial use, such as swimming pools or
saunas;
■ Ensure while working on the unit that the power
has been switched off and cannot be accidentally
switched back on;
■ Always take ESD-inhibiting measures when
dealing with electronics, such as wearing an
antistatic wristband;
■ After using the user manual, place it back on the
unit;
■ It is prohibited to modify the unit or the
specifications stated in this document;
■ The unit cannot be opened without using tools;
■ It must not be possible to touch the fans by hand,
which is why ducts of at least 900 mm must be
connected to the unit.
2 P-menus
The software of the unit can be customised to the
users requirements by changing the values in the
P-menus of the software.
The P-menus can be accessed by the display, read-
out software or ComfoSense.
P-menus P1, P2 and P9 can be accessed by the
user, mainly to read statuses and set time delays.
The remaining P-menus P3 to P8 are intended solely
for the installer.
Display
Action on
display
Reaction on
Display1
Explanation
1Press The main
P-menus are being
entered.
2Press
and
simultaneously
for at least 3
seconds
The main
P-menus for the
installer are being
entered.
3Press
or
The different
P-menus are being
displayed.
4Press The selected
P-menu is being
entered.
5Press
or
The different sub
P-menus are being
displayed.
Or press Return to the
main P-menus.
6Press The selected sub
P-menu is being
entered.
7Press
or
The value of the
selected sub
P-menu is being
changed.2
8Press The change value is
confirmed and returned
to the sub P-menus of
the selected P-menu.2
Or press Old settings are
restored and returned
to the sub P-menus of
the selected P-menu.
9Press Return to the
main P-menus.
10 Press Return to the
default screen.
Read-out software
A Windows PC or laptop can be connected with
a special connection cable to one of the service
connectors at the bottom of the unit. The special
read-out software and cable can be ordered from
Zehnder.
The service connectors cannot be used at the
same time. Disconnect a present ComfoSense
before connecting the read-out cable.
ComfoSense
In the manual of the ComfoSense it mentions how to
enter the P-menus using the ComfoSense.
1 The displayed settings are the standard setting of the unit.
This may differ from the actual setting of the unit.
2 This is not possible in a reading menu.

6 - EN
2.1 P- menus for the user.
Menu P1 > Status of time programmes
Status
Submenu Description Activated
P11 Is menu P21 currently active? Yes (1) / No (0)
P12 Is menu P22 currently active? Yes (1) / No (0)
P13 Is menu P23 currently active? Yes (1) / No (0)
P14 Is menu P24 currently active? Yes (1) / No (0)
P15 Is menu P25 currently active? Yes (1) / No (0)
P16 Is menu P26 currently active? Yes (1) / No (0)
P17 Is the Summermode currently
active?
Yes (1) / No (0)
Menu P9 > Status of additional programmes
Status
Submenu Description Activated
P90 Open fire programme active? Yes (1) / No (0)
P91 Bypass open? Yes (1) / No (0)
P94 n/a Yes (1) / No (0)
P95 Frost protection or pre heater
active?
Yes (1) / No (0)
P97 Enthalpy programme active? Yes (1) / No (0)
Menu P2 > Setting time delays
Time delay values
Submenu Description Minimum Maximum General
reset
P21
Only applies to systems
fitted with a bathroom
switch.
Delay timer for the bathroom switch (to switch to high position).
■ ‘x‘ minutes after operating the bathroom switch,
the unit switches to the high setting.
0 Min. 15 Min. 0 Min.
P22
Only applies to systems
fitted with a bathroom
switch.
Overrun timer for the bathroom switch (to switch to normal
position).
■ ‘x‘ minutes after operating the bathroom switch, the unit
switches back to the normal setting.
0 Min. 120 Min. 30 Min.
P23
Only applies to systems
fitted with a SA 1-3V, CCB,
or SA 0-3V switches.
Overrun timer for ventilation position 3 (using a hardwired
position switch).
■ If ventilation setting 3 (high) is switched on briefly
(< 3 sec), the unit will switch to the high setting for ‘x’ minutes
and then automatically return to the normal setting.
If any switch is operated during this lagging time the unit will
instantly revert to the ventilation position as set at that time.
0 Min. 120 Min. 0 Min.
P24 Filter warning
■ ‘x’ weeks after cleaning or replacing the filters the “filter dirty”
alert will reappear.
10 weeks 26 weeks 16 weeks
P25
Only applies to systems
fitted with an RFZ switch.
Overrun timer for ventilation setting 3 (using ).
■ After pressing briefly (< 2 sec.), the unit will switch to the
high setting for ‘x’ minutes and then
automatically returns to the normal setting.
If any switch is operated during this lagging time the unit will
instantly revert to the ventilation position as set at that time.
1 Min. 20 Min. 10 Min.
P26
Only applies to systems
fitted with an RFZ switch.
Overrun timer for ventilation setting 3 (using ).
■ After pressing continously (> 2 sec.), the
unit will switch to the high setting for ‘x’ minutes and then
automatically returns to the normal setting.
If any switch is operated during this lagging time the unit will
instantly revert to the ventilation position as set at that time.
1 Min. 120 Min. 30 Min.
P27
Only applies to systems
fitted with a ComfoSense.
Time for the boost setting.
■ After turning on the PARTY TIMER on the ComfoSense, the
unit will switch to the high setting for ‘x’ minutes and then
automatically returns to the NORMAL setting.
If any switch is operated during this lagging time the unit will
instantly revert to the ventilation position as set at that time.
0 Min. 120 Min. 30 Min.

6 - EN
EN- 7
2.2 P-menus for the installer
Menus without a value at minimum and maximum are Reading menus.
Menu P3 > Setting ventilation programmes
Ventilation programme values
Submenu Description Minimum Maximum General Reset
P30 Setting the capacity (in %) of the exhaust fan in ABSEN T POSITION.0% or 15% 97% nL / HL
15% / 15%
P31 Setting the capacity (in %) of the exhaust fan in LOW POSITION.16% 98% nL / HL
35% / 40%
P32 Setting the capacity (in %) of the exhaust fan in MED I UM POSITION.17% 99% nL / HL
50% / 70%
P33 Setting the capacity (in %) of the exhaust fan to HIGH POSITI O N.18% 100% nL / HL
70% / 90%
P34 Setting the capacity (in %) of the supply fan to ABSENT PO S I T I O N.0% or 15% 97% nL / HL
15% / 15%
P35 Setting the capacity (in %) of the supply fan in LOW POSITION.16% 98% nL / HL
35% / 40%
P36 Setting the capacity (in %) of the
supply fan in MED IUM POSITION. 17% 99% nL / HL
50% / 70%
P37 Setting the capacity (in %) of the supply fan in HIGH P OSITION.18% 100% nL / HL
70% / 90%
P38 Current capacity (in %) of the exhaust fan. - - Current %
P39 Current capacity (in %) of the supply fan. - - Current %
Menu P4 > Reading the temperatures
Temperature values
Submenu Description Minimum Maximum General Reset
P41 Comfort temperature 12 ºC 28 ºC 20 ºC
P45 Current value of T1 (= outside air temperature) - - Current ºC
P46 Current value of T2 (= supply air temperature) - - Current ºC
P47 Current value of T3 (= return air temperature) - - Current ºC
P48 Current value of T4 (= exhaust air temperature) - - Current ºC
Menu P5 >Setting additional programmes
Additional programme values
Submenu Description Minimum Maximum General Reset
P50 Activation of the open fire programme. 0 (= No) 1 (= Yes) 0
P51 Confirming the presence of a pre heater 0 (= No) 1 (= Yes) 0
Only change if a pre heater is installed afterwards or a general reset is given.
P52 Setting the pre heater programme.
■ 0; Extreme protection;
■ 1; High protection;
■ 2; Nominal protection;
■ 3; Economy.
0 3 2
In extreme protection mode the pre heater is switched on soonest; this level offers the best guarantee of
balanced ventilation. Vice versa, in economy mode the pre heater switches on at the last possible moment;
balanced ventilation is not guaranteed in this mode.
P54 Confirming the presence of a bypass. 0 (= No) 1 (= Yes) 1
The standard ComfoAir configuration includes a bypass. Therefore, leave the value at ‘1’.
P56 Setting the required air volume in the house.
■ nL: ”normal air volume”;
■ HL: "high air volume".
nL HL HL
Setting the air volume is the starting point for programming the air specifications and setting the fans.
P58 n/a 0 1 0

8 - EN
Additional programme values
Submenu Description Minimum Maximum General Reset
P59 Confirming the presence of an enthalpy exchanger.
■ 0; Enthalpy exchanger not fitted;
■ 1; n/a;
■ 2; Enthalpy exchanger without RH sensor.
0 (= No) 2 (= Yes) 0
Ensure the condensation drain is sealed.
If an enthalpy exchanger without a sensor is selected, then the safety programme will not be activated and
malfunction alerts EA1 & EA2 will never occur.
Menu P6 > Setting additional programmes
Additional programme values
Submenu Description Minimum Maximum General Reset
P60 Confirming the presence of a sub-soil heat exchanger.
■ 0; Sub-soil heat exchanger not fitted;
■ 1; n/a;
■ 3; Sub-soil heat exchanger unregulated.
0 (= No) 3 (= Yes) 0
Menu P7 > Reading malfunctions (and system information)
(Malfunction) information values
Submenu Description Minimum Maximum General Reset
P70 Current software version. Version number of the software (without “v”)
P71 Most recent malfunction. Code in accordance with alarm and malfunction alert
P72 Malfunction before the most recent one. Code in accordance with alarm and malfunction alert
P73 Malfunction before the most recent two. Code in accordance with alarm and malfunction alert
P74 Resetting malfunction(s).
■ Set value to ‘1’ and press “OK” on the display;
■ Set value to '1' and press "OK" on the ComfoSense panel.
0 1
(= activate)
0
P75 General reset.
■ Set value to ‘1’ and press “OK” on the display for at least 5
seconds to carry out a general reset;
■ Set value to '1' and press “OK” on the ComfoSense panel to carry
out a general reset.
All original software settings are restored following a general reset.
0 1
(= activate)
0
After a general reset, the ComfoAir will ask you to reset the “nL / HL” (see submenu P56).
Following a general reset, all settings and programmes need to be checked and set to the right value.
P76 Self-testing the ComfoAir 0 1
(= activate)
0
■ The display’s green LEDs light up one by one;
■ The ComfoAir will run at maximum Rotations Per Minute (RPM);
■ The bypass valve will open and close;
■ The pre heater valve will open and close after the bypass has closed (If a pre heater is fitted).
P77 Resetting filter dirty counter 0 1
(= activate)
0
This resets the counter that triggers a dirty filter alert on the ComfoAir.
This allows the filter to be cleaned or replaced before the dirty filter alert appears.

8 - EN EN- 9
Menu P8 > n/a
Analogue input values
Submenu Description Minimum Maximum General Reset
850 n/a 0 1 0
851 n/a 0 1 0
852 n/a 0 100 50
853 n/a 0 99 0
854 n/a 0 100 100
855 n/a 0 1 0
856 n/a 0 100 -

10 - EN
3 Commissioning
3.1 Programming air specifications
0
50
100
150
200
250
300
350
400
0 50 100 150 200 250 300
pst [Pa]
Qv [m3/h]
100%
40%
30%
15%
90%
80%
70%
60%
50%
The unit has been programmed with two sets of
standard ventilation settings. These sets can be
chosen in menu P56. When a general reset is given
the menu will be set to the HL ventilation settings.
From the factory the unit will be delivered with the nL
ventilation settings.
In menu P3 the pre-programmed ventilation settings
can be altered. The supply fan and the exhaust
fan can be set independently for all 4 ventilation
settings.
The absent setting cannot be chosen with a normal
3 position switch. For this the unit would need a
ComfoSense.
Default settings air volume
nL HL
Absent Setting 15% 15%
Low Setting 35% 40%
Medium Setting 50% 70%
High Setting 70% 90%
Follow this procedure to determine which settings the installation needs:
1 2 Example valve 3
Close all windows and doors.
When the property is being
occupied make sure the
air ducts are clean before
programming the air
specifications.
Open all valves and grilles fully. Set the unit in programming mode.
■ Display:
Press simultaneously for at least 3
seconds on and until
“Inr” appears on the display;
■ ComfoSense:
Activate INIT menu.
In programming mode, the
bypass valve is always closed.
After 30 minutes, the unit
automatically terminates the
programming mode.

10 - EN
EN- 11
4
0
50
100
150
200
250
300
350
400
0 50 100 150 200 250 300
pst [Pa]
Qv [m3/h]
100%
40%
30%
15%
90%
80%
70%
60%
50%
Example graphic
&
5Example flow meter 6
0
50
100
150
200
250
300
350
400
0 50 100 150 200 250 300
pst [Pa]
Qv [m3/h]
100%
40%
30%
15%
90%
80%
70%
60%
50%
Example graphic
&
Set menu P33 (exhaust 3) and P37
(supply 3) to the expected percentage.
Use the graphic of the air
specifications (see beginning of this
chapter) to determine the expected
percentage.
If the resistance of the system is
unknown use 150Pa.
Measure the air flows of all valves with
a flow meter.
Note them all down.
Set menu P33 (exhaust 3) and P37
(supply 3) to the correct percentage.
Set the needed values 5%
above the building regulation
code to overcome the
resistance from the valves
when these are set to the
right position. The deviation
may therefore be +5% to
+10% of the building code.
Explanation point 6
7Example valve 8Example flow meter
∆ <5%
P33 (exhaust 3):
Add all the measurements of the
exhaust valves together. Determine
the deviation to the expected setting.
P37 (supply 3):
Add all the measurements of the
supply valves together.
Determine the deviation to the
expected setting.
Regulate the valves and grilles to the
required flow per room.
Measure the air flows of all valves with
a flow meter.
Note them all down.
Check if the total supply air does not
deviate more than 5% from the total
exaust air.
If the deviation is too great go back to
step 6.
9
0
50
100
150
200
250
300
350
400
0 50 100 150 200 250 300
pst [Pa]
Qv [m3/h]
100%
40%
30%
15%
90%
80%
70%
60%
50%
Example graphic 10 11 Example report
Set menu P31 (exhaust 1), P32
(exhaust 2), P35 (supply 1) and P36
(supply 2) to the correct percentage.
We advise to use the
following ratio:
■ Position 1 > 30% of the
building regulation code;
■ Position 2 > 60% of the
building regulation code;
■ Position 3 > 100% of the
building regulation code.
Switch off the programming mode:
■ Display:
Press simultaneously for at least 3
seconds on and until
“Inr” disappears off the display.
■ ComfoSense:
Deactivate INIT menu.
Fill in the installation/test report in the
back of the user manual.

12 - EN
3.2 Time delays
In menu P2 several time delays can be programmed.
3.2.1 Bathroom switch (P21 and P22)
Switch
High
Position
I
O
I
O
Switch
High
Position
I
O
I
O
P21=10 P22=30
The bathroom switch has two time delays: one delay
timer and one overrun timer.
Delay timer (P21)
As long as the delay timer is running the high
position will not turn on.
If the bathroom switch is turned off in this period the
overrun timer will not start.
The delay timer can be set in menu P21. The default
setting is 0 minutes. The timer can be set from 0
minutes to 15 minutes or every minute in-between.
Overrun timer (P22)
As long as the overrun timer is running the high
position will not turn off.
This can be bypassed by choosing a different
ventilation setting with a position switch.
The overrun timer can be set in menu P22. The
default setting is 30 minutes. The timer can be set
from 0 minutes to 120 minutes or every minute in-
between.
3.2.2 SA 1-3V / SA 0-3V / CCB: Wired position
switch (P23)
Switch
High
Position
I
O
I
O
P23=30
The wired position switch has one overrun timer
which can be set in menu P23.
As long as the overrun timer is running the ventilation
setting will remain in the High position.
This can be bypassed by choosing a different
ventilation setting with a position switch.
After the overrun timer is finished the ventilation
setting will automatically return to the set value.
The default setting is 0 minutes. The timer can be
set from 0 minutes to 120 minutes or every minute
in-between.
3.2.3 RFZ: Wireless position switch (P25 and
P26)
Switch
High
Position
I
O
I
O
P26=30
The wireless position switch has two overrun timer
which can be set in menu P25 and menu P26.
As long as the overrun timer is running the ventilation
setting will remain in the High position.
This can be bypassed by choosing a different
ventilation setting with a position switch.
After the overrun timer is finished the ventilation
setting will automatically return to the previous value.
Short overrun timer (P25)
The default setting of the P25 menu is 10 minutes.
The timer of menu P25 can be set from 1 minute to
20 minutes or every minute in-between.
Long overrun timer (P26)
The default setting of the P26 menu is 30 minutes.
The timer of menu P26 can be set from 1 minute to
120 minutes or every minute in-between.
3.2.4 ComfoSense (P27)
Switch
High
Position
I
O
I
O
P27=30
The ComfoSense has one overrun timer which can
be set in menu P27.
As long as the overrun timer is running the ventilation
setting will remain in the High position.
This can be bypassed by choosing a different
ventilation setting with a position switch.
After the overrun timer is finished the ventilation
setting will automatically turn to the set value.
The default setting is 30 minutes. The timer can be
set from 0 minutes to 120 minutes or every minute
in-between.

12 - EN
EN- 13
3.3 Frost protection (P52)
The unit with pre heater has a
frost protection which can be
set in menu P52 in to 4
settings.
The default setting is 2: Nominal protection.
In cold areas (frequent periods of -10°C or lower),
where the pre heater must switch on sooner, the
setting can be set to 0: Extreme protection or 1: High
protection.
In warmer areas, where the pre heater does not have
to switch on so soon, the setting can be set to 3:
Economy.
3.4 Fire place program (P50)
When a fire place is present in
the dwelling the open fire
program must be activated.
This must be done in menu
P50.
The default setting is 0: open fire program not active.
The open fire program can activated by setting the
menu P50 to 1: open fire program active.
3.5 Enthalpy exchanger (P59)
The presence of a enthalpy
exchanger must be given in
menu P59.
The default setting is 0; Enthalpy exchanger not
fitted.
When a enthalpy exchanger is installed this menu
must be set to 2; Enthalpy exchanger without RH
sensor. When the unit is delivered from factory with
enthalpy exchanger the standard setting is already
changed to 2.
Ensure the condensation drain is sealed.

14 - EN
4 Technical specifications
Position Ventilation capacity Power Current Silencer
housing
Sound power1
Supply fan
Sound power1
Exhaust fan
15% 28 m3/h at 3 Pa 7 W 0.08 A 27.2 dB(A) 39 dB(A) 38 dB(A)
20% 37 m3/h at 6 Pa 8 W 0.09 A 27.8 dB(A) 40 dB(A) 39 dB(A)
30% 55 m3/h at 14 Pa 10 W 0.10 A 29.8 dB(A) 42 dB(A) 40 dB(A)
40% 76 m3/h at 27 Pa 13 W 0.14 A 31.9 dB(A) 45 dB(A) 41 dB(A)
50% 97 m3/h at 44 Pa 18 W 0.20 A 34.7 dB(A) 43 dB(A) 43 dB(A)
60% 118 m3/h at 64 Pa 26 W 0.27 A 37.4 dB(A) 53 dB(A) 45 dB(A)
70% 141 m3/h at 92 Pa 37 W 0.37 A 40.2 dB(A) 57 dB(A) 48 dB(A)
80% 160 m3/h at 118 Pa 50 W 0.48 A 42.9 dB(A) 59 dB(A) 50 dB(A)
90% 178 m3/h at 147 Pa 66 W 0.61 A 44.7 dB(A) 62 dB(A) 52 dB(A)
100% 195 m3/h at 175 Pa 85 W 0.75 A 45.8 dB(A) 63 dB(A) 53 dB(A)
Default settings air volume
Absent Setting (nL / HL) 15% 15%
Low Setting (nL / HL) 35% 40%
Medium Setting (nL / HL) 50% 70%
High Setting (nL / HL) 70% 90%
Connection data
Power Supply 230V±10%, single phase, 50/60Hz
cos f20.38 – 0.49
Power Maximal 1250 W 5.77 A
Power Pre heater3250 W 4.99 A
General specifications
Material Housing Coated Sheet Steel
Material Interior EPP and ABS
Material Heat Exchanger Polystyrene
Material Enthalpy Exchanger Polyethylene-polyether-copolymer
Thermal Yield2up to 89%
Weight 24kg
Humidity Maximal 72% at 20°C
Ambient temperature (minimum / maximum) 0°C 40°C
IP classification IP40
Filter class (outdoor air / return air) G4 or F7 G4
Type speed control 4 speed
Connecting air ducting Sleeve
Nominal diameter air ducting (top / bottom) rectangular 125
Temperature sensors 10k NTC KTY 81-210
Temperature Resistance MIN. Resistance MID. Resistance MAX.
10 ºC 19,570 kΩ 19,904 kΩ 20,242 kΩ
15 ºC 15.485 kΩ 15,712 kΩ 15,941 kΩ
18 ºC 13,502 kΩ 13,681 kΩ 13,861 kΩ
19 ºC 12,906 kΩ 13,071 kΩ 13,237 kΩ
20 ºC 12,339 kΩ 12,491 kΩ 12,644 kΩ
21 ºC 11,801 kΩ 11,941 kΩ 12,082 kΩ
22 ºC 11,291 kΩ 11,420 kΩ 11,550 kΩ
25 ºC 9,900 kΩ 10,000 kΩ 10,100 kΩ
30 ºC 7,959 kΩ 8,057 kΩ 8,155 kΩ
1 The Lw noise power level is measured at 0m
2 According to standard EN13141-7
3 At -15°C and 180m³/h

14 - EN
EN- 15
4.1 Service parts
The mentioned service parts below can be ordered as a special service set from Zehnder.
Each set will come with his own service instruction explaining how to replace the part.
Please check the pricelist of Zehnder for the article codes and prices of all available sets.
2
1
8
3
4
5
9
6
4
7
2
Position Part
1Set Filter Handles
2■ Filterset G4/G4 (1x/1x)
■ Filterset G4/F7 (1x/1x)
3Pre heater
4Fan
5■ Heat exchanger
■ Enthalpy exchanger
6Control PCB
7Bypass motor
8Display
9Condensation drain sealing cap (only for Switzerland units)

16 - EN
4.2 Dimension sketch
558
65525 680
115
60
25
022
25
30 30
280 109
12
299
20 C
i
125
87
86 194
140140
144

16 - EN EN- 17
Legend
Code Description
ODA Outdoor air
SUP Supply air
ETA Extract air
EHA Exhaust air
CCondensation drain
655
200
55868 44
680
128 118
100
323347
10
333
150
128 104
SUP
ODA
ETA
EHA
SUP

18 - EN
4.3 Wiring diagram
Legend Colour code
Code Colour Code Colour Code Colour
(N) B Blue (L1) G Grey WWhite
(PE) G/Y Green/ Yellow (L2) Bl Black YYellow
(L3) Br Brown RRed
Legend
Code Decription Code Decription
PH Pre heater T1 NTC-Sensor Outdoor air
M1 Exhaust motor T2 NTC-Sensor Supply air
M2 Supply motor T3 NTC-Sensor Return air
DISPLAY Display T4 NTC-Sensor Exhaust air
BYP Bypass valve BS Bathroom switch
LED n/a SERV Service/ComfoSense connector
Control PCB

18 - EN EN- 19
Power cord Luxe version
ComfoSense
Position switch

20 - EN
5 Maintenance
Failure to carry out (periodic) maintenance on
the unit ultimately compromises the performance
of the ventilation system.
A maintenance log has been included at the back
of the user manual which can be used to note all
performed maintenance.
In the user manual are details of how to carry out the
following maintenance:
■ Cleaning the valves/and or grilles;
■ Cleaning and replacing the filter.
With menu P77 the counter of the dirty filter alert
can be reset before the time is up.
Instructions for replacing parts can be found in the
replacement instruction added with the service part.
When carrying out any work on the unit, make
sure the power is disconnected and cannot be
inadvertently reconnected.
Always take ESD-inhibiting measures when
dealing with PCBs, (printed circuits boards) such
as wearing an antistatic wristband.
To clean the whole ventilation system, we
recommend hiring a specialised cleaning firm.
For maintenance of the devices and controls
connected to the unit, please read the instructions in
the corresponding manuals.
A copy of a Zehnder device or control manual can be
obtained from Zehnder.
When all work on the unit is finished follow the following instructions:
1 2 3
Install all parts in reverse order.
Fasten the screws to a maximum of
1.5 Nm. This is roughly equal to speed
2 of an average battery-powered drill.
Switch the power supply on. Carry out the self-test of menu P76.