Vaillant recoVAIR/3 SERIES Specification sheet

For the owner and expert technician
Operating and Installation Manual
recoVAIR/3
Domestic ventilation unit with heat recovery and remote control recoVAIR VAR 275/3
recoVAIR VAR 350/3
GB

For the owner
Operating Manual
recoVAIR/3
Contents
General Information...................................................4
1 Notes on the documentation.........................4
1.1 Documents storage ................................................4
1.2 Used Symbols...........................................................4
1.3 Manual Validity........................................................4
1.4 CE Label.....................................................................4
1.5 Identification Plate .................................................5
2 Safety Instructions and Regulations...........5
2.1 Safety Instructions .................................................5
2.1.1 Assembly and Installation.....................................5
2.1.2 Operation ..................................................................5
2.1.3 Changes in the Environment of the
Domestic Ventilation Unit.....................................5
2.2 Precaution Instructions.........................................6
3 Installation and Operation Instructions ......6
3.1 Intended Use ............................................................6
3.2 Installation Site Requirements ............................6
3.3 Servicing....................................................................6
3.4 Recycling and Disposal..........................................6
3.4.1 Device.........................................................................6
3.4.2 Packing ......................................................................6
3.5 Energy Saving Tips.................................................7
4 Handling ...........................................................7
4.1 Assembling of the Domestic Ventilation
Unit .............................................................................7
4.2 Bypass (optional) ....................................................7
4.3 Switching-on and -off of the device...................7
4.4 Functional Overview of the Digital Remote
Control.......................................................................7
4.5 Display Overview.....................................................8
4.5.1 Meaning of Symbols...............................................8
4.6 Settings from the Basic Display ..........................8
4.7 Programming of the Clock Timer .......................9
4.8 Special functions................................................... 10
4.9 Information Level....................................................11
5 Troubleshooting ..............................................11
6 Maintenance .................................................. 12
6.1 Cleaning or Replacing the Filter in the
Domestic Ventilation Unit....................................12
6.2 Cleaning or Replacing the Filters in the
Bypass Casing.........................................................13
6.3 Filter ..........................................................................13
7 Warranty and Customer Service .................13
7.1 Manufacturer’s Warranty and Liability.............13
7.2 Vaillant Service.......................................................13

General Information
The domestic ventilation unit consists of a central venti-
lation appliance for air exchange with heat recovery and
a remote control. For summer operation, you can obtain
a bypass as accessory. It can directly provide living
rooms with cool external air whenever it is necessary.
The external air flow bypasses the heat exchanger.
The unit is connected to an air ducting system, which is
equipped with silencers, pre-filters, fresh-air and ex-
haust-air grilles and louvres.
Fresh air grilles supply fresh air to the living areas and
stale moist air is extracted from the kitchen, bathroom
and WC.
With the digital remote control the user is able to auto-
matically switch and adapt the domestic ventilation unit
power to their own requirements.
The unit ensures:
– A constant air exchange in the building
– The hygienic minimum air exchange in accordance
with UK building regulations Part F
– Energy savings thanks to high efficiency heat recov-
ery
– A high hygiene standard due to the prevention of hu-
midity and mould damages of the building
The exact model description of the unit is to be found
on the identification plate positioned below the unit.
1 Notes on the documentation
The following notes serve as a guide for the entire doc-
umentation.
Other documents are valid in connection with this oper-
ating manual.
We accept no liability for any damage caused by fail-
ure to observe these instructions.
1.1 Documents storage
Please store this operating manual and other applicable
documents where they are accessible at all times.
1.2 Used Symbols
When operating the unit, please observe the safety in-
structions in this operating manual!
dDanger!
Immediate danger to life and limb!
eDanger!
Risk of death from electric shock!
aCaution!
Potentially dangerous situation for the product
and environment!
hNote
Useful Information and Hints.
• Symbol for a required task.
1.3 Manual Validity
This operating manual applies exclusively to units with
the following article numbers:
0010006801
0010006802
For the article number of your unit, refer to the identifi-
cation plate.
1.4 CE Label
The CE label shows that the recoVAIR ventilation unit
complies with the basic requirements of the following
directives and guidelines:
– Low-voltage Directive 73/23/EEC, modified with
Directive 93/68/EEC
– EMC-Directive 89/336/EEC, modified by the Directive
91/263/EEC, 92/31/EEC and 93/68/EEC
Operating Manual recoVAIR/3 0020062918_034
General Information
1 Notes on the documentation

5Operating Manual recoVAIR/3 0020062918_03
1.5 Identification Plate
Vaillant GmbH Remscheid / Germany
Serial-no. 1234567890xxxxxx
VAR 275 / 3
230V~ 50 HZ
PMax 210 W
VMax 275 m³ / h
dP Max 170 Pa
TMax. 60 °C
IPX2
Bar – Code
Fig. 1.1 Identification Plate
The identification plate is positioned below the unit. The
indications given on the identification plate have the fol-
lowing meaning:
Units Value Description
230 V ~50 Hz Mains voltage
Pmax 210 W Maximum electrical power consumption
Vmax 275 m3/h Maximum air volume flow
dPmax 170 Pa Allowable pressure loss of the device at
VMax
TMax 60
°C Maximum operating temperature
Table 1.1 Explanation of identification plate
2 Safety Instructions and Regulations
2.1 Safety Instructions
Always observe the following safety instructions and
regulations.
2.1.1 Assembly and Installation
The installation of the device can only be carried out by
a qualified expert technician. He/she will be responsible
for the correct installation and start-up.
He/she is also responsible for the inspection and the
corrective maintenance of the device as well as for the
changes in the air flow adjustment.
If the system is used for ventilation in locations with
room-dependent combustion equipment depending on
the room air, the corresponding flue gas extraction sys-
tems must be checked and maintained by a trained
technician. It is mandatory to prevent flue gas leakage
from the combustion equipment.
2.1.2 Operation
Note that the device can only be used if all ventilation
pipes of the device are connected and the entire device
is closed.
The unit must only be operated with the supplied filters
installed. Regularly check whether the filters are dirty
and damaged.
We recommend to visually check the filters every
6 months and to replace them every 12 months, or after
2000 operating hours at the latest. If the system is to
be used for ventilation purposes in locations with room-
dependent combustion facilities, the corresponding flue
gas extraction systems must be checked and maintained
by suitably trained personnel.
2.1.3 Changes in the Environment of the Domestic
Ventilation Unit
aCaution!
Do not make any changes to the unit or casing
which might impair the system functions!
Do not modify
- the unit,
– the outside air, fresh air, exhaust and discharge air
ducts, the pipes for condensation water and the unit
mains connection.
This also applies to alterations to structural elements in
the vicinity of the unit which might affect its operational
safety.
– do not obstruct the air inlets and outlets with doors,
ceilings, windows and walls even temporarily. Do not
cover the air inlets and outlets, e.g. with clothes or
similar. When laying floor materials, do not block or
reduce the vent apertures at the bottom of the doors.
To make alterations to the unit or to its environment,
you must refer to the suitably qualified expert techni-
cian who is qualified to do this work.
Notes on the documentation 1
Safety instructions and regulations 2

Operating Manual recoVAIR/3 0020062918_036
Only expert technicians are authorised to execute repair
and maintenance work (with the exception of replacing
the filters). It is recommended that you carry out a visu-
al inspection of the filters at least every 6 months and
replace the filters every 12 months, or at least after
2,000 hours of operation."
2.2 Precaution Instructions
eDanger!
Risk of fatal electric shock from touching live
connections.
Before working on the unit always disconnect
from the mains supply and ensure that the unit
cannot be restarted.
In case of failures during operation, proceed in accord-
ance with the fault finding table of chapter 5 of this
document. In case it is not possible to eliminate the
fault, please contact an expert technician.
3 Installation and Operation
Instructions
3.1 Intended Use
The Vaillant domestic ventilation units are built and de-
signed according to accepted safety rules and regula-
tions. Nevertheless, improper use can cause serious or
fatal injury to the user or others, and the appliance or
other property can be damaged.
This device is not designed to be used by persons (in-
cluding children) with limited mental and sensory capa-
bilities or by persons who have not enough experience
and/or knowledge, unless they are supervised by a per-
son who is responsible for their safety or have been in-
structed by him/her about how to use the device.
Children must be supervised to ensure they do not play
with the unit.
The domestic ventilation unit must be installed by a
qualified technician, who is responsible for the observ-
ance of the existing regulations, rules and guidelines.
Due to high level of dust, operation during the construc-
tion phase is not allowed.
The domestic ventilation units are specifically designed
for the ventilation of residential spaces. The remote
control including the operating mode selector and the
timer must only be used for controlling the domestic
ventilation unit as described in these instructions; it is
not designed for any other purpose.
Any other or additional use is considered to be improp-
er. The domestic ventilation unit is not suitable for ven-
tilating swimming pools.
The manufacturer/supplier shall not be responsible for
any damages resulting from such improper use.
The user alone bears the risk.
Intended use includes observing the operating and in-
stallation manual and all other applicable documents, as
well as adhering to the maintenance and inspection con-
ditions.
aCaution!
Any improper use is forbidden.
3.2 Installation Site Requirements
– These ventilation units may be internally installed in
flats, cellar spaces, storage or multipurpose rooms as
well as in attic spaces.
– The unit must be mounted wall-hung and in the verti-
cal position. Please observe the permitted load carry-
ing capacity of the wall.
– There must be enough space for mounting the air
duct connections, for a 230V mains voltage connec-
tion (usually a switched socket outlet) provided by the
customer as well as a drain outlet with a drain trap.
– The installation site should be frost-proof.
– The installation site must be equipped with a ventila-
tion system.
– The local mains power isolator must always be
easily accessible.
3.3 Servicing
• Clean the cladding of your unit with a damp cloth and
a little soap.
hNote
Do not use abrasive cleansers or agents which
could damage the cladding of the coated steel
plate.
3.4 Recycling and Disposal
The ventilation unit as well as the packaging consist
mainly of recyclable raw materials.
3.4.1 Device
The filters used with the unit may be disposed of with
the normal household waste. Do not dispose the unit
and the other accessories with normal household waste.
Please ensure that the old unit and accessories are
properly disposed of.
hNote
Please observe applicable national regulations.
3.4.2 Packing
Leave the disposal of the transport packaging to the
qualified servicing company which installed the appli-
ance.
2 Safety instructions and regulations
3 Installation and Operation Instructions

7Operating Manual recoVAIR/3 0020062918_03
3.5 Energy Saving Tips
Although this unit is used to increase comfort and ener-
gy savings, it is possible to maximise energy savings if
you observe the following.
hNote
At low ambient temperatures below the room
temperature, you will reach the maximum ener-
gy saving if you keep the windows closed and
ensure the necessary air exchange by the oper-
ation of the domestic ventilation unit.
It goes without saying that venting the room is always
possible by opening the windows.
4 Handling
4.1 Assembling of the Domestic Ventilation Unit
Designation Explanation
Fresh air From the ventilation unit into the living space
Exhaust air From the living space into the ventilation unit
Outside air From outside to the domestic ventilation unit
Outgoing air From the domestic ventilation unit to outside
Table 4.1 Designation of the ventilation ducts
7
6
5
1
2
3
4
Fig. 4.1 recoVAIR VAR 275/3 and 350/3
Key
1 Bypass connection 5 Door in cladding
2 Discharge air duct connec-
tion
6 Exhaust air duct connec-
tion
3 Fresh air duct connection 7 Outside air duct connec-
tion
4 Front cladding
4.2 Bypass (optional)
The device can be equipped with a bypass, which is fit-
ted on the top of the device, see fig. 4.2.
With a bypass installed the user may operate the so-
called "free cooling mode" during the summer months
with the outside temperature falling below room tem-
perature during the night. The cooler outside tempera-
ture will not be warmed by the device before it was
blown into the room. To protect the bypass valve from
dirt, we recommend an outside air filter of the filter
class at least G3. The filter is installed on site into the
outside air duct, possibly close to the air inlet.
1
2
3
4
5
Fig. 4.2 Bypass
Key
1 Filter
2 Outgoing air connection
3 Fresh air connection
4 Exhaust air connection
5 Aeration with the outside air
4.3 Switching-on and -off of the device
The domestic ventilation unit is supplied with electrical
power via a 230 V mains line.
• Insert the mains plug into the 230-V socket.
The electronics of the ventilation appliance is starting.
The display shows the unit type (display "RECO 275 or
350") and then, after about 3 seconds, the indication
switches to the basic display.
• To switch off the unit, pull the mains plug out of the
plug socket. Using the "off" menu point on the remote
control switches the unit to the lowest fan speed.
4.4 Functional Overview of the Digital Remote
Control
The domestic ventilation unit is equipped with a digital
remote control to operate the unit.
The remote control has three buttons as well as a dial
(Vaillant operating concept "turn and click") to set vari-
ous operating programs. In addition, you can set special
functions as well as a time-controlled function of the
ventilation unit.
Installation and Operation Instructions 3
Handling 4

Operating Manual recoVAIR/3 0020062918_038
2
1
Fig. 4.3 Digital Remote Control recoVAIR
Key
1 Display
2 Dial ("Turn and Click")
i Information key
F Special functions key
P Programming key (expert technician level)
4.5 Display Overview
The display shows either the current operating mode in
the basic display or, if activated, the special function.
Furthermore, the current room temperature, current
weekday and current time is displayed.
7
6
2
1
3
5
4
Fig. 4.4 Display Overview
Key
1 Operator levels
2 Ventilators/Bypass display
3 Multi-functional display
4 Week days
5 Actual values
6 Operation modes
7 Special functions
4.5.1 Meaning of Symbols
The following symbols may appear in the display:
Symbol Meaning
Special function Energy-saving
Special function Advance
Special function Holidays
Static: 2nd fan stage (day mode)
Flashing: 3rd fan stage (HIGH)
Off: 1. fan stage (night mode)
Static: Cooling required
Flashing: Bypass open (summer mode)
Off: Bypass not fitted or closed
Automatic mode
Day mode (2nd fan stage)
Night mode (1st fan stage)
Mode with fan stage holidays (minimum)
Actual room temperature
Day of week
Multi-function display left (time ...)
Multi-function display right (KWh)
Information level
Time programming level
Installer level
Service/diagnostic level
Table 4.2 Symbols
4.6 Settings from the Basic Display
From the basic display you can select and then change
the major functions with the "turn and click" dial:
With the "click" - you can move from one menu item to
the other. Press the dial from the
basic display several times in a row
until you have reached the desired
function.
The parameter to be changed is
blinking and an indication arrow ap-
pears.
With the "turn" - you can change the blinking value.
hNote
After the necessary settings have been made,
no confirmation is required.
10 seconds after the last input the indicated
function is automatically activated and then
the display returns to the basic display.
4 Handling

9Operating Manual recoVAIR/3 0020062918_03
Action Setting of
Click
Operating mode
Selected symbol is flashing
Turn Turn the dial in order to change the operat-
ing mode.
You can select the following settings:
Day mode:
Irrespective of the time programme the
remote control switches the fans into
2nd stage.
Night mode:
Irrespective of the time programme the
remote control switches the fans into
1st stage
Automatic operation:
The change between the day and night
operation occurs depending on time. Ad-
ditionally, the current operating mode is
displayed.
Minimum operation
Irrespective of the time programme the
remote control switches the fans into the
lowest stage.
Click
Fan stage 3
Display HIGH
Turn Turn the dial in order to set the period of
time. The 3rd fan stage is active at this time.
To deactivate this function, set the period
of time to "0.0".
Click
Bypass in stand-by
Display
If no bypass unit is connected, this menu
point will be left out!
Turn Turn the dial to set the number
of days dur-
ing which the bypass shall be in stand-by
mode. Under the correct temperature condi-
tions the bypass engine switches to summer
mode.
Click
Check and setting of the time
Press the dial several times in order to se-
lect days of the week, hours and minutes as
required.The selected category flashes in the
display.
Turn Turn the dial to change days of the week,
hours and minutes.
Table 4.3 Operation from the basic display
Action Setting of
Click
Check and setting of the year clock
Press the dial several times in order to se-
lect the day, the month and the year.
If the clock is not activated, this point will
be left out!
Turn Turn the dial in order to change the day, the
month and the year.
Click
Check and reset of the filter timer
Display FILT
The timer indicates the number of days after
the last reset since the filter has been used.
Turn Turn the dial to the left to reset the timer to
0. Turn the dial to the right to reset the previ-
ous value.
Click
Return to basic display
If no new setting is executed for more than 10
seconds, the display will automatically return
to the basic display.
Table 4.3 Operation from the Basic Display (continued)
4.7 Programming of the Clock Timer
With the programming button you can change the times
for the timer mode. With activated timer, function reco-
VAIR will switch between the first and the second stage
(time-controlled)
• Outside the time window: Stage 1 = night operation
• Within the time window: Stage 2 = day operation
It is possible to set up to three different switching-on
and -off times (time windows) for each day of the week.
In the display of the remote control these time windows
are called H1, H2 and H3.
You can combine individual days in groups or a
week block. The following groups are possible:
MO - SU; MO - FR; SA - SU.
Factory-set operating times are:
Time window Day of the
week/Block Start time End time
H1 MO-FR 6:00 22:00
H1 SA 7:30 22:30
H1 SU 7:30 22:00
Table 4.4 Factory-set operating times
The operating times are set as follows:
• Start with the P button to programme the times.
• Select the time window.
• Select a day or a week block.
• Determine the starting time.
• Determine the end time.
Handling 4

Operating Manual recoVAIR/3 0020062918_0310
• Terminate programming of the operating time with
the P button.
hNote
Within the programming level you can navigate
with the "turn and click technique".
With the "click" - you can change within one program-
ming level from one menu item to
the other. Push the dial several times
in order to reach the desired func-
tion. The parameter you want to
change is blinking and an indication
arrow appears.
With the "turn" - you can change the blinking value.
Action Setting of
Activation of the programming level
Display
Click
Select the time window
Turn Turn the dial to select the time window H1 to
H3.
Click
Select the days of the week or the blocks
for the week
Turn Turn the dial in order to select the individual
days or week blocks.
Click
Select On and Off times
You select successively the hours and min-
utes for the switching time by pressing the
dial several times.
Turn Turn the dial in order to change the hours or
minutes of the switching times.
Return to basic display
If no new setting is executed for more than
5 minutes, the display will return as well to
the basic display.
Table 4.5 Programming of the time windows
4.8 Special functions
With the F button (special functions) you can start the
individual special functions.
You select the function by pressing the F button several
times.
hNote
After the necessary settings have been made,
no confirmation is required 10 seconds after the
last input the indicated function is automatical-
ly activated and then the display returns to the
basic display.
By once pressing the "F" button you can deactivate an
active special function.
The deactivation takes 2 seconds. By selecting another
special function the currently activated special function
is terminated.
It is only possible to operate one special function at a
time.
Action Special function
Energy-saving function symbol in the dis-
play:
With the energy-saving function the activated
fan stage is set to night mode (stage 1) for a
limited period of time. The user indicates the
period in hours and minutes (minimum
2:30 h). Then the remote control switches
back to the timer mode. Also see figure 4.5
Advance function symbol in the display:
The advance function is used to bridge the
set timer program and activate day mode
(stage 2). The function will remain activated
till the next programmed switch-over to day
mode starts. Also see figure 4.5
Holiday function symbol in the display:
In case the holiday function has been select-
ed, the fan stage is set to a minimum value
for a period to be set (in days). At 0:00 hours,
a day is subtracted from the set period.
Table 4.6 Special functions
4 Handling

11Operating Manual recoVAIR/3 0020062918_03
4.9 Information Level
Press the information button to reach the info level.
In addition to identifying the controller, the information
level is used to quickly and easily check the set operat-
ing times. Each time window may be individually opened.
If there is no setting action for more than 10 seconds,
the display will return to the basic display.
Action Special function
RECO 275/350
Display of the unit type
FILT
Filter days
Indication of the days for which the filter has
been operated since the last filter reset.
AIR
Current air flow supply in m3/h
BYP
Display of the fresh air temperature in oC, if a
bypass has been installed.
DATE
The current date is displayed. Prerequisite is
to activate the calendar first.
Time programme
for the activated heating times
You can call the timer program by pressing
the information button repeatedly.
If the current day of the week is not indicated
in the display, the controller is in the daily
program.
Table 4.7 Information level
time
time
time
6:00 22:0017:0010:00
6:00 22:00 2:00
2:00
6:00 22:0017:0010:00 2:00
17:0010:00
Energy-saving 5h
Automatic mode
Advance function
Energy-saving function
Fig. 4.5 Comparison of automatic, advance and energy-saving
mode
5 Troubleshooting
Do not try to remedy any other failure than those indi-
cated in table 5.1. For all other failures contact an expert
technician.
eDanger!
Risk of fatal electric shock from touching live
connections. Pull the mains plug before starting
to work on the device.
• For troubleshooting it is mandatory to pull the mains
plug in order to disconnect the unit from the power
supply.
Malfunction Cause Remedy
No function Mains voltage
interrupted With the mains voltage re-es- tablished the unit will automati-
cally switch on.
Reduced air
flow Filter is heavily soiled Clean or replace the soiled fil- ters as described in chapter 6.
Table 5.1 Troubleshooting
Never interfere or modify the domestic ventilation unit
or other parts of the system.
Only restart the domestic ventilation unit after all fail-
ures and malfunctions have been remedied by an expert
technician.
Handling 4
Troubleshooting 5

Operating Manual recoVAIR/3 0020062918_0312
6 Maintenance
Continued efficient operation, reliability and a long serv-
ice life as well as safety, require inspections and mainte-
nance work to be regularly carried out by an expert
technician on an annual basis.
You must employ a qualified technician to complete
such work.
Caution! You must always ensure that units mounted
high up and units mounted in roof spaces can easily be
reached using suitable equipment.
aCaution!
We recommend making a maintenance agree-
ment. The operational reliability of the device
can be impaired, resulting in damage to proper-
ty or personal injury, if maintenance work is
not carried out.
The following must be checked:
– Soiling of the filters (cleaning or replacing the filters)
– Condensate discharge
– Function of the installed bypass unit
You as the owner or user may execute the following
maintenance work yourself:
– Clean and replace the filters in the domestic ventila-
tion unit.
– Clean and replace the filter in the bypass casing
(if installed).
– Clean the fresh air or exhaust air valves in the living
space.
– Reset the time interval for filter replacement in ac-
cordance with section 4.6 "Settings from the basic
display" Caution: Always ensure suitable access equip-
ment is used to gain access to eqipment installed at
high levels or in a loft space.
aCaution!
Always ensure that the facilities installed high-
er or in the loft must be well accessible, if re-
quired, a suitable equipment must be used.
It depends on the contamination levels how often the fil-
ters must be cleaned or replaced. We recommend to
regularly check the filters during the initial operational
period and asses the need to clean them e.g. every
three months. If you then feel that the filters are only
slightly contaminated or dirty, you may extend the in-
terval.
hNote
Replace the filters at least once a year or after
maximum 2000 operating hours.
You can clean the filters with a vacuum cleaner. If this is
not enough, the filters must be replaced. Cleaning the
filters with water or other liquids is expressly prohibited.
Dispose the used filters with the domestic waste.
6.1 Cleaning or Replacing the Filter in the
Domestic Ventilation Unit
To check and clean the filters, please proceed as fol-
lows:
eDanger!
Risk of fatal electric shock from touching live
connections. Pull the mains plug before starting
to work on the device.
• Open the left front flap.
• Pull the filter out of the unit.
• Remove the filter handles from the filters.
• Observe the descriptions in the inner side of the door.
Fig. 6.1 Filter replacement
• The filters are to be cleaned or replaced depending on
the degree of soiling.
aCaution!
Before inserting the filters, please ensure the
correct positioning in order to avoid damaging
of the filters.
• Position the filter handles on the clean or new filters.
On the one side, the filter handles are fitted with guides
which must be pushed into the grooves in the unit.
– The upper filter is mounted with these guide pointing
to the bottom.
– The lower filter is mounted with the guide pointing to
the top.
• Push the filters back into the unit.
• Close the front flap.
• Plug in the mains plug into the plug socket.
The unit is now ready for operation.
6 Maintenance

13Operating Manual recoVAIR/3 0020062918_03
6.2 Cleaning or Replacing the Filters in the
Bypass Casing
To check and clean the bypass filter, please proceed as
follows:
eDanger!
Risk of fatal electric shock from touching live
connections. Pull the mains plug before starting
to work on the device.
• Pull the filter out of the unit.
• Remove the filter handle from the filter.
• The filter is to be cleaned or replaced depending on
the degree of soiling.
Fig. 6.2 Removing the bypass filter
aCaution!
When mounting the bypass filter please ensure
the correct positioning in order to avoid damag-
ing the filter.
• Position the filter handle on the clean or new filter.
On one side of the filter handle there are guides, which
must be pushed into the corresponding grooves. The fil-
ter is mounted with the guides pointing to the bottom.
• Push the filter back into the unit.
• Plug in the mains plug into the plug socket.
6.3 Filter
Only use the original Vaillant filters.
In addition to the standard filters there are as well avail-
able special fine filters. If you intend to use such filters,
please contact an expert technician.
Description Filter class Ordering number
Filterset recoVAIR G3 0020023930
Filter recoVAIR Bypass G3 0020023931
Feinfilterset recoVAIR F6 0020026061
Feinfilter recoVAIR Bypass F6 0020026118
Table 6.1 Filter
hNote
Replace the filters at least once a year or after
maximum 2000 operating hours.
7 Warranty and Customer Service
7.1 Manufacturer’s Warranty and Liability
Vaillant GmbH warrants that this product is free from
defects of manufacture.
It is covered by a manufacturer’s warranty of
24 months.
The aforesaid manufacturer’s warranty shall be applied
in addition to any legal warranty cover and shall not re-
place or restrict your legal claims under the Sale of
Goods Act. This warranty shall become effective from
the day of installation, or 2 years after the manufacture
of this system whichever is soonest. This warranty shall
be applicable only for such appliances which have been
installed in UK by a competent installer.
If on the rare occasion that material or fabrication de-
fects arise during the warranty period, the Vaillant
Customer Service will repair these defects free of
charge. It shall be at the sole discretion of the manufac-
turer’s Customer Service if he is to repair a defective
appliance or to replace it. Work under warranty shall
never cause an extension of the warranty period.
This warranty shall only cover material or manufactur-
ing defects. The warranty shall not be applicable to such
faults or defects caused due to improper installation,
commissioning, handling and use, insufficient mainte-
nance or intervention by unauthorised persons. The
warranty shall become void if such work is executed to
the appliance by other persons than those belonging to
our customer service or an authorised installer. The
aforesaid shall apply as well if parts or components are
incorporated in the appliance or if the appliance is con-
nected to parts or components which have not been ap-
proved and certified by Vaillant GmbH. Furthermore, the
aforesaid warranty shall not be applicable to such
claims exceeding the elimination of defects and faults
free of charge, e.g. claims for damages.
Please call our service number 0870-8503073 to report
any defects under warranty.
7.2 Vaillant Service
To ensure regular servicing, it is strongly recommended
that arrangements are made for a Maintenance Agree-
ment. Please contact Vaillant Service Solutions
(0870-8503073) for further details.
Maintenance 6
Warranty and Customer Service 7

For the heating engineer
Installation Instructions
recoVAIR/3
Contents
1 Notes on the documentation........................16
1.1 Documentation Storage ...................................... 16
1.2 Used Symbols......................................................... 16
1.3 Manual Validity ...................................................... 16
1.4 CE label.................................................................... 16
2 Device description .........................................16
2.1 Identification Plate ............................................... 16
2.2 Intended Use .......................................................... 16
2.3 Connections.............................................................17
2.3.1 Domestic Ventilation Unit....................................17
2.3.2 Digital Remote Control recoVAIR ......................17
2.3.3 Condensate Drain Trap.........................................17
2.4 Functionality............................................................17
3 Safety Instructions and regulations...........17
3.1 Safety Instructions ................................................17
3.2 General requirements...........................................17
3.2.1 Preliminary remarks for heat recovery
ventilation products ..............................................17
3.2.2 Related documents............................................... 18
3.3 Regulations............................................................. 18
4 Assembly and Installation........................... 18
4.1 Scope of Delivery.................................................. 18
4.2 Installation Site Requirements .......................... 18
4.2.1 Installation Site of the Domestic
Ventilation Unit...................................................... 18
4.2.2 Installation Site of the Remote Control .......... 19
4.3 Assembling ............................................................. 19
4.3.1 Domestic Ventilation Unit................................... 19
4.3.2 Remote control..................................................... 20
4.3.3 Bypass..................................................................... 20
4.4 Measurements ........................................................21
4.4.1 Measurements recoVAIR VAR 275/3
and 350/3 ................................................................21
4.5 Assembly and Installation of the Domestic
Ventilation Unit......................................................22
4.5.1 Mounting of the Fixing Bracket.........................22
4.5.2 Mounting of the Domestic Ventilation
Unit ...........................................................................22
4.5.3 Connection of the Condensed Water Drain....22
4.5.4 Establishment of Pipe Connections..................23
4.6 Opening and Closing the Domestic
Ventilation Unit......................................................23
4.7 Mounting and Electrical Connection of
the Bypass (optional) ......................................... 24
4.8 Assembly and Installation of the Remote
Control.................................................................... 25
4.8.1 Establishment of Electrical Connection
of the Remote Control........................................ 26
4.9 Establishment of Electrical Connection
of the 3-stage Switch (optional)....................... 28
4.10 Alarm Input (optional) ........................................ 28
4.11 Alarm Output (optional)..................................... 28
4.12 Function check-out.............................................. 29
5 Start-Up........................................................ 29
5.1 Adjustment of the Digital Remote Control.... 29
5.1.1 Expert Technician Level..................................... 29
5.1.2 Service/Diagnostics Level ................................. 30
5.1.3 Testing of the bypass and other functions .....31
5.1.4 Reset to the Factory Setting...............................31
5.1.5 Setting from the Week to the Day Mode .........31
5.2 Domestic Ventilation Unit Adjustment.............31
5.2.1 Adjustment procedure..........................................31
5.2.2 Total Air Flow Adjustment...................................31
5.3 Operator Delivery .................................................32
6 Inspection and maintenance .......................32
6.1 Removing and Cleaning the Filter of
the Domestic Ventilation Unit............................32
6.2 Removing and Cleaning the Heat
Exchanger ...............................................................32
6.3 Cleaning the Condensed Water Drain..............33
6.4 Cleaning or Replacing the Bypass Filter ........ 34
6.5 Test Operation and Restart............................... 34
6.6 Spare Parts and Accessories ............................ 34
7 Troubleshooting ............................................35
7.1 Error Messages in the Remote Control.......... 36
7.2 Resistance Values of the Temperature
Sensor..................................................................... 36
8 Warranty and Customer Service ................37
8.1 Manufacturer’s Warranty and Liability............37
8.2 Vaillant Service......................................................37
9 Technical Data ............................................. 38
9.1 Domestic Ventilation Unit.................................. 38
9.2 Remote Control .................................................... 38
9.3 Bypass..................................................................... 38
9.4 Performance Diagrams....................................... 39
10 Templates ..................................................... 40
10.1 Templates: Start-up measuring report...........40
10.2 Template: Filter replacement report................ 41
10.3 Template: Hygiene check report...................... 42

Installation Manual recoVAIR/3 0020062918_0316
1 Notes on the documentation
The following notes serve as a guide for the entire doc-
umentation.
Further documents apply in combination with this instal-
lation instructions. We accept no liability for any dam-
age caused by non-observance of these instructions.
1.1 Documentation Storage
Give this installation manual, all accompanying docu-
ments and all auxiliary materials, if there are some, to
the operator who will store them so that they are avail-
able when required.
1.2 Used Symbols
When operating the unit, please observe the safety in-
structions in this operating manual!
dDanger!
Immediate danger to life and limb!
eDanger!
Risk of death from electric shock!
aCaution!
Potentially dangerous situation for the product
and environment!
hNote
Useful Information and Hints.
• Symbol indicating the required action
1.3 Manual Validity
This installation manual is valid exceptionally for devic-
es with the following item numbers:
0010006801
0010006802
For the article number of your unit, refer to the identifi-
cation plate.
1.4 CE label
The CE label shows that this unit complies with the fol-
lowing directives:
– Low-voltage Directive 73/23/EEC, modified with
Directive 93/68/EEC
– EMC-Directive 89/336/EEC, modified by the Directive
91/263/EEC, 92/31/EEC and 93/68/EEC
2 Device description
2.1 Identification Plate
Vaillant GmbH Remscheid / Germany
Serial-no. 1234567890xxxxxx
VAR 275 / 3
230V~ 50 HZ
PMax 210 W
VMax 275 m³ / h
dP Max 170 Pa
TMax. 60 °C
IPX2
Bar – Code
Fig. 2.1 Identification plate
The identification plate is positioned below the unit. The
indications given on the identification plate have the fol-
lowing meaning:
Units Value Description
230 V ~50 Hz Mains voltage
Pmax 210 W Maximum electrical power consumption
Vmax 275 m3/h Maximum air volume flow
dPmax 170 Pa allowable pressure loss of the device
at VMax
TMax 60
°C Maximum operating temperature
Table 2.1 Identification plate
For further information please read section 9 "Technical data".
2.2 Intended Use
The Vaillant domestic ventilation units are built and de-
signed according to accepted safety rules and regula-
tions. Nevertheless, there is still a risk of injury or death
to the user or others or of damage to the device and
other property in the event of improper use or use for
which it is not intended.
1 Notes on the documentation
2 Device description

17Installation Manual recoVAIR/3 0020062918_03
The recoVAIR domestic ventilation unit must be in-
stalled by a qualified expert technician, who is responsi-
ble for the observance of the existing regulations, rules
and guidelines.
This device is not designed to be used by persons (in-
cluding children) with limited mental and sensory capa-
bilities or by persons who have not enough experience
and/or knowledge, unless they are supervised by a per-
son who is responsible for their safety or have been in-
structed by him/her about how to use the device.
Children must be supervised to ensure they do not play
with the unit.
The domestic ventilation units are specifically designed
for the ventilation of residential spaces.
The remote control including the operating mode selec-
tor and the timer must only be used for controlling the
domestic ventilation unit as described in these instruc-
tions; it is not designed for any other purpose.
Due to high level of dust, operation during the construc-
tion phase is not allowed.
Any other or additional use is considered to be improp-
er. The domestic ventilation unit is not suitable for ven-
tilating swimming pools. The manufacturer/supplier
shall not be responsible for any damages resulting from
such improper use.
The user alone bears the risk.
Intended use includes the observance of the operating
and installation manual and all other applicable docu-
ments, as well as adherence to the maintenance and in-
spection conditions.
aCaution!
Any improper use is forbidden.
2.3 Connections
2.3.1 Domestic Ventilation Unit
Necessary connections:
– recoVAIR VAR 275/3: 4 x air duct connections
ø 150 mm, or alternative ø 160 mm and ø 180 mm
– recoVAIR VAR 350/3: 4 x air duct connections
ø 180 mm, or alternative ø 200 mm
– Condensed water drain G 3/4 connection for the con-
densate drain trap
– Electrical connection above mains voltage socket with
230 V 50 Hz mains voltage
2.3.2 Digital Remote Control recoVAIR
On the remote control installation site, the following ad-
ditional connections are required:
– Control cable from the remote control to the domestic
ventilation unit is a 2-core cable, with cross-section
0,75 mm2. Maximum cable length 300 m
The connection must comply with the valid local and na-
tional rules and regulations.
2.3.3 Condensate Drain Trap
The attached condensate drain trap must be connected
to the threaded tube under the device. Additionally, an
odour trap is required in the waste water system. For
hygienic reasons, between the drain traps an air gap of
at least 20 mm must be provided.
2.4 Functionality
1
3
4
2
Fig. 2.2 Air flow diagram
Key
1 Outside air (from outside)
2 Exhaust air (from the living room)
3 Fresh air (to the living room)
4 Outgoing air (to the outside)
3 Safety Instructions and regulations
3.1 Safety Instructions
Installation of the device can be only carried out by a
qualified technician. He/she will be responsible for the
correct installation and start-up.
He/she is also responsible for the inspection and the
corrective maintenance of the device as well as for the
changes in the air flow adjustment.
3.2 General requirements
3.2.1 Preliminary remarks for heat recovery
ventilation products
This appliance should only be used in conjunction with a
propriety ductwork system installed in accordance with
HVCA guide DW144 (steel ductwork) & DW154 (plastic
ductwork).
Device description 2
Safety instructions and regulations 3

Installation Manual recoVAIR/3 0020062918_0318
3.2.2 Related documents
The installation of the heat recovery ventilation unit and
any associated ductwork and outlets must be in accord-
ance with the relevant requirements of the Health and
Safety Document No. 635 (The Electricity at Work Regu-
lations 1989), BS7671 (IEE Wiring Regulations). It should
also be in accordance with the relevant requirements of
the Local Authority, Building Regulations, The Building
Regulations (Scotland), The Building Regulations (North-
ern Ireland) and the relevant recommendations of the
following:
BS 5588 – Fire precautions in design construction and
use in buildings
BSEN 13141 - Ventilation for buildings. Performance test-
ing of components/products for residential ventilation.
BS EN 1506 - Ventilation for buildings. Sheet metal air
ducts and fittings with circular cross-section.
BS EN 13142 - Ventilation for buildings. Components/
products for residential ventilation. Required and op-
tional performance characteristics
BS EN 12236 - Ventilation for buildings. Ductwork hang-
ers and supports. Requirements for strength
3.3 Regulations
If the system is to be operated with boilers or other gas
appliances which are dependent on the ambient air, the
ventilation must be balanced in accordance to the needs
of the appliance.
The following laws, rules, regulation standards and
guidelines in the valid version must be complied with for
the installation:
– Safety instructions and regulations for low-voltage in-
stallations EN 1010
– EST Good Practice guide 268 – Efficient ventilation of
buildings – A guide to specifiers
– Rules and regulations for air circulation in flats and
habitable areas and residential buildings EN 1087
– Rules and regulations for ventilation systems
DIN 1946
– Any pertaining rules and regulations of the local or
national building authorities
– The present instructions for installation
4 Assembly and Installation
4.1 Scope of Delivery
– Domestic ventilation unit
– Digital remote control recoVAIR
– Mounting set consisting of:
– Fixing brackets 405 x 60 mm
– Condensate drain trap
Accessories (optional)
– Bypass recoVAIR
– Filtersets
4.2 Installation Site Requirements
The installation site of the domestic ventilation unit
must be constantly frost-free and dry. The system in-
stallation must be planned in detail. Especially pay at-
tention to the positioning of the fresh air and exhaust
air ducts and to include sufficient sound insulation.
aCaution!
The temperature of the device can be consider-
ably lower than the temperature of the room is
being installed. To avoid undesirable accumula-
tion of condensate, the circulation of fresh and
exhaust air must be provided in the room (basic
ventilation).
4.2.1 Installation Site of the Domestic Ventilation
Unit
Please note the following instructions before choosing
where to install the ventilation unit:
aCaution!
When mounting the system it is absolutely nec-
essary to ensure the horizontal positioning of
the ventilation unit and an angle of > 0° and < 1°
in vertical position to ensure that the conden-
sation water can easily flow out of the unit.
The domestic ventilation unit is wall-mounted, prefera-
bly close to a drain outlet for the condensation water
drain.
– The ventilation unit must be installed with due consid-
eration of the requirement for adequate and practical
air ducting and services (fresh air and exhaust air,
electrical power). Ensure enough space is provided on
top of the unit and at its sides to be able to mount the
required air ducts, additional silencers and bypass
unit.
– The installation site must be selected so that the duct-
work distances to and from the domestic ventilation
unit are as short as possible.
– The wall to which the domestic ventilation unit is to be
mounted must offer sufficient load-carrying capacity
for the weight of the commissioned ventilation unit.
– It is possible that the supplied fixing elements do not
meet the requirements of the installation wall. The re-
quired mounting elements must be provided by the
customer.
– The condensed water drain must be connected with
the attached condensate drain trap to the water out-
let with the odour trap (siphon).
3 Safety instructions and regulations
4 Assembly and installation

19Installation Manual recoVAIR/3 0020062918_03
1000
100 300
100
300
600
0-1˚
Fig. 4.1 Required minimum distances/installation free spaces
– The attached condensed water drain trap is destined
to compensate pressure between the device and the
installation room, for that reason it must always be
filled with clear water.
– For hygienic reasons, it must not be directly connect-
ed to the odour trap of the waste water system. En-
sure an air gap of at least 20 mm.
– For the installation, at least 10 cm of free space on the
side of the device must be provided.
– For installation, filter replacement and maintenance
works, about 1 m working space in front of the ventila-
tion unit is needed. Over and beneath the device at
least 30 cm are required (see also fig. 4.1).
– If the domestic ventilation unit is mounted on an inter-
nal wall, do not select a location directly above bed-
rooms due to possible sound transfer. Always choose
a location above a non-occupied room such as a hall
or bathroom.
– With wood-joist ceilings or similar you can provide ad-
ditional sound insulation by adding insulation between
the joists.
– Always ensure that the condensation water drain is
free running.
– To avoid annoyance by excessive noise select a
sound-absorbing hose for final connections from the
unit to the air outlets.
– Install a silencer. This will help to neutralise possible
noise transmission between the unit and the air duct-
ing and reduce annoyance by noise.
– Keep the air supply inlet at a sufficient distance from
discharge air, exhaust air and drain ventilation. Com-
ply with the legal building rules and regulations.
– When installing the fresh air input and discharge air
ducts you will have to ensure sufficient separation to
avoid that the discharged air being re-circulated into
the fresh air input.
According to VDI 6022 the minimum separation is
10 m.
4.2.2 Installation Site of the Remote Control
– The remote control must be mounted such that there
is enough space around it to complete the electric wir-
ing as well as easy operation of the control.
– The remote control must be installed inside the living
space in an easily accessible place. For further details
see section 4.8.
4.3 Assembling
4.3.1 Domestic Ventilation Unit
1
2
3
4
5
6
7
8
9
10
11
12
13
14
Fig. 4.2 Assembling recoVAIR VAR 275/3 and 350/3
Key
1 Air duct Outgoing air
2 Air duct Fresh air
3 Fresh air fan
4 Circuit board
5 Exhaust air fan
6 Condensate drain outlet
7 Electrical connection of
the 3-stage switch
8 Outside air filter
9 Heat exchanger
10 Exhaust air filter
11 Mounting point Front
cladding
12 Air duct Exhaust air
13 Air duct Outside air
14 Bypass connection
The unit is equipped with a frost protecting sensor.
This sensor measures the temperature of the discharge
air. The fresh air fan is switched off if the discharge air
temperature falls below 3 °C.
Once switched off, the fresh air fan is only switched on
again when the discharge air temperature has risen
above 8 °C.
Assembly and installation 4

Installation Manual recoVAIR/3 0020062918_0320
If the protection circuit is activated against the low
pressure (STOV, see section 5.1.1), the frost protection
sensor switches both ventilators off.
The outside air flow may be much cooler than the tem-
perature of the discharge air measured by the frost pro-
tection sensor before the anti-freeze monitoring device
is activated. Its operation is possible up to -7 °C outside
temperature.
4.3.2 Remote control
The control elements of the remote control are ex-
plained in the operating manual in section 4.4.
4.3.3 Bypass
12
3
Fig. 4.3 Bypass Installation
Key
1 Filter
2 Ventilation flap
3 Air inlet from outside
Vaillant GmbH Remscheid / Germany
Serial-no. 1234567890xxxxxx
Bypass VAR 275 - VAR 350
12 V DC
PMax 3 W
IPX2
nur zu verwenden mit recoVAIR 275 / 350
only to use with recoVAIR 275 / 350
alleen te gebruiken met recoVAIR 275 / 350
utiliser seulement avec le recoVAIR 275 / 350
Kan kun bruges sammen med recoVAIR 275/350
Bar – Code
Fig. 4.4 Identification plate Bypass
You can find the identification plate on the top of the
device. The indications given on the identification plate
have the following meaning:
Units Value Description
12 V DC Voltage supply
Pmax 3 W Maximum electrical power consumption
Table 4.1 Explanation of bypass identification plate
4 Assembly and installation