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.

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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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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.

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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.

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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

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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.

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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 -

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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.