Vallox 280 SE User manual

Document
1.09.627 ENG
Valid from
10.9.2015
Updated
10.9.2015
Manual
Ventilation unit
Models
Vallox 280 SE R electric/electric
Vallox 280 SE L electric/electric
Vallox 280 SE R electric/VKL
Vallox 280 SE L electric/VKL
Type
3487
Vallox
280SE
ENGLISH MANUAL

GENERAL INFORMATION
• Main parts of ventilation unit
• Differences between models
• General safety instructions, guarantee and liability
• Introduction
GENERAL OPERATING INSTRUCTIONS
• Switching unit on
• Controlling ventilation
• Post-heating
• Fireplace/boost function
OPERATING INSTRUCTIONS FOR CONTROL PANEL
• Use of control panel
• Operating menu
• Settings menu
• Week-clock control
MAINTENANCE
• Filters
• Heat recovery cells
• Fans
• Condensing water connections
• Pressure difference switch
TROUBLESHOOTING
TECHNICAL DATA
• Main parts, dimensions and duct outlets
• Supply/extract air volumes, fan curves, measuring points, sound values
• 280 SE electric/electric
• 280 SE electric/VKL
• 280 SE with silencer unit
• Internal electrical connection
• External electrical connection
• Heat recovery and heating
• Data about liquid-circulating VKL post-heating radiator
MOUNTING
• Mounting of control panel
• Mounting of sensors
• Location
• Connections
• Silencer unit
EXPLODED VIEW AND PARTS LIST
3
6
11
14
17
16
24
29
2
Vallox
280SE CONTENTS
CONTENTS

L model in the figure. In the R model,
the parts are in a mirror image.
A
N
N
U
A
L
E
F
F
I
C
I
E
N
C
Y
R
A
T
I
N
G
O
F
E
X
T
R
A
C
T
A
I
R
H
E
A
T
R
E
C
O
V
E
R
Y
C
3© Vallox - All rights reserved
Vallox
280SE
MAIN PARTS
OPTIONS
1
2
3
4
5
6
7
8
9
10
11
12
13
10
12
11
13
3
6
5
7
4
2
1
9
8
Supply air fan
Extract air fan
Heat recovery cell
Summer/winter damper
Supply air filter F7
Extract air filter G4
Outdoor air filter G4
Condensing water tank
Condensing water outlet
Electrical connection penetrations
Measuring tubes
Preheating radiator (electric,2500 W)
Post-heating radiator (electric, 2500 W, or water) Vallox Digit SED controller
Humidity
sensor
Carbon
dioxide sensor
LON
converter
KNX
converter
Filter guard
(pressure
difference switch)
Silencer part
MAIN PARTS

4
Vallox
280SE GENERAL INFORMATION
DIFFERENCES BETWEEN MODELS
• The model Vallox 280 SE electric/electric has an
electric preheating and post-heating radiator.
• The model Vallox 280 SE electric/VKL has an electric
preheating radiator and a liquid-circulating post-
heating radiator,VKL.
Mounting
The unit is mounted on the floor.
General safety instructions
The safe and proper handling of the unit requires that
you know the basic safety regulations and the purpose
of the ventilation system. Please read this manual before
using the ventilation unit. Keep this manual for later use.
If you lose the manual, you can download it from our
web pages.
This manual includes all the information that is important
in order to use the system safely. All the people operat-
ing and maintaining the ventilation system must follow
this manual. In addition, you have to observe the local
regulations issued for preventing accidents.
PURPOSE
The purpose of Vallox ventilation units is to take care of
demand-controlled and continuous ventilation in such a
way that people and the structures stay healthy.
GUARANTEE AND LIABILITY
The guarantee and liability are not in force if accidents
take place because of the following reasons:
• Inappropriate use of the ventilation system and the
control unit
• Faulty mounting, taking into use and operation
• Use of the ventilation system with a faulty security
system
• Not following advice concerning transportation,
mounting, operation and maintenance
• Carrying out unauthorised structural changes and
changing the software without permission
• Accidents caused by extra parts or force majeure
MOUNTING
The mounting and taking into use must be performed
by a competent expert. The electrical installation and
connections must be carried out by an electrician in ac-
cordance with the local regulations.
IMPORTANT
For further information, please see www.vallox.com
GENERAL INFORMATION

5© Vallox - All rights reserved
Vallox
280SE
GENERAL INFORMATION
INTRODUCTION
For indoor air to stay healthy and good not only for peo-
ple but also for the structures of the dwelling, ventilation
has to be in operation all the time. It is not recommend-
ed to stop ventilation even for longer holidays as indoor
air becomes stuffy and the humidity of indoor air may
condense during the heating period in the ventilation
ductwork and structures, thereby causing humidity dam-
age.
You can control and automate the operation of the
Vallox ventilation unit in the following ways:
• Via a Digit SED controller mounted in the building.The
week-clock of the controller gives you the possibility
to create a ventilation programme that is perfectly in
line with your rhythm of life.
• Managing fan speeds with remote monitoring
control with voltage signals coming from real estate
automation.
• Managing the whole operation of the unit via remote
monitoring control or via real estate automation,
to which the unit is connected with a KNX or LON
converter.
Ventilation can also be adjusted automatically with op-
tional carbon dioxide and humidity sensors. In this case,
ventilation stays optimal even when the residence is
empty.
WARNING
The unit is not intended to be used by children (less than
18 years of age) or by persons whose senses, physical
properties, mental properties or lack of knowledge and
experience limit the safe use of the unit.
These persons can use the unit under the control of a
person responsible for their safety or in accordance with
the instructions.
Vallox
DigitSED
Control panel
CO2sensor
(option)
LON converter
(option)
%RH sensor
(option)
Ventilation control
methods
GENERAL INFORMATION

6
Vallox
280SE GENERAL OPERATING INSTRUCTIONS
SWITCHING THE UNIT ON
Start the unit (1) and choose a suitable ventilation pow-
er at the control panel (2-3). You can connect up to 3
control panels in parallel. They can be located in differ-
ent rooms, and each of them can be used to control
ventilation in the same way.
In normal circumstances, basic ventilation is enough.
This means that air is exchanged once every two hours.
Boosting is needed during sauna baths, cooking, wash-
ing clothes or family parties, for instance. If the system in-
cludes a carbon dioxide and/or humidity sensor, Vallox
280 SE automatically takes care of demand-controlled
ventilation.
Supply air temperature adjustment
functions
• Switching the post-heating unit on/off.
• Setting desired supply air temperature
(+10 °C...+30 °C).
• Choosing desired method for controlling supply air
temperature (constant temperature adjustment,
cascade based temperature adjustment).
• Setting desired supply air temperature with week-
clock control function.
Preheating
• Setting control temperature for preheating unit
(-6 °C...+15 °C exhaust air).
• Changing setpoints.
1
2 3
CONTROLLING VENTILATION
The unit can be controlled with a control panel. With
week-clock control that comes standard with the unit,
you can control the fan power of the unit and the set-
point of supply air temperature.
Furthermore, the adjustment of demand-controlled ven-
tilation can be implemented with optional carbon diox-
ide and humidity sensors.
The fan power of the unit can also be controlled with a
voltage signal.
Controlling ventilation with Vallox Digit
SED control panel
The control panel can be used for the following ventila-
tion control functions:
Ventilation power adjustment functions
• Starting and stopping.
• Power adjustment (8 positions).
• Setting of basic fan speed (or minimum fan speed)
and maximum fan speed.
• Adjusting power with the week clock control function.
Ventilation power cannot be set lower than basic fan
speed if the minimum power set is > 1.
When carbon dioxide and/or humidity adjustment is
on, power cannot be set higher than the maximum fan
speed if maximum power has been set < 8.
When humidity and carbon dioxide adjustment is off, fan
speed can be raised to speed 8 (factory setting).
It is possible to choose the limitation of maximum fan
speed to be on all the time. This setting is found in the
Settings menu; see section 3.6 in the Operating instruc-
tions for control panel.
Vallox
DigitSED
WARNING
It is not recommended to stop ventilation!!
OPERATING INSTRUCTIONS

7© Vallox - All rights reserved
Vallox
280SE
GENERAL OPERATING INSTRUCTIONS
4 5
Ventilation control with carbon dioxide
sensor (CO2)
• In carbon dioxide control (4) Vallox 280 SE adjusts
fan speed so that carbon dioxide content in the
ventilation zone stays below the setpoint or the value
given. If there are two or more sensors, fan speed
adjustment takes place according to the higher
measuring result.
• 1 to 5 carbon dioxide sensors can be connected as
options to the Vallox 280 SE unit.
• Carbon dioxide control is switched on/off and the
desired value (500...2000 ppm) is given. See section
3.25 in the Operating instructions for control panel.
The factory setting is 900 ppm. Indicative maximum
carbon dioxide content in good indoor air is 1000
ppm.
• During control, it is possible to raise fan speed at the
control panel to the maximum fan speed and lower it
to the basic fan speed. In carbon dioxide control, the
limitation of maximum fan speed is on.
Controlling ventilation with humidity
sensor (%RH)
There are two adjusting methods for controlling fan
speed. See section 3.19 in the Operating instructions for
control panel. (5):
1. Automatic humidity value setting
(factory setting).
• Automatic humidity value setting is suitable for
controlling ventilation in bathrooms, for instance, or in
other rooms where relative humidity of air varies.The
value is updated automatically on the basis of the
humidity data collected by the sensor and changes
as air humidity changes because of change of
season, for instance.Ventilation is boosted when the
humidity level goes above the average value.
2. Setting humidity value manually
• You can also set the desired humidity level on a
certain demand-controlled level between 1 and 99%
RH. See section 3.16. in the Operating instructions
for control panel.This can be used in public sauna
facilities and swimming pools. By adjusting ventilation
power you try to keep air humidity at the value
chosen.
You can choose the adjustment method at the control-
ler. Indicative humidity content of good indoor air is circa
45%.
During control, it is possible to raise fan speed at the
control panel to the maximum fan speed set and to low-
er it to the basic fan speed.
In humidity control, fan speed is adjusted between the
basic and maximum fan speeds chosen.
When the unit is taken into use for the first time and au-
tomatic humidity value setting (factory setting) is on, the
programme needs about 3 to 10 hours to define the av-
erage air humidity. During this time, humidity adjustment
is not active (because the first value set at the factory is
100%).
Automatic search is on even if humidity control has not
been chosen.
Humidity sensorCarbon dioxide
sensor
OPERATING INSTRUCTIONS

Voltage signal values
Fan speed Voltage signal (VDC)
0 0.20...1.25 VDC
1 1.75...2.25 VDC
2 2.75...3.25 VDC
3 3.75...4.25 VDC
4 4.75...5.25 VDC
5 5.75...6.25 VDC
6 6.75...7.25 VDC
7 7.75...8.25 VDC
8 8.75...10.00 VDC
Controlling ventilation
with voltage signal
• The fan power of Vallox 280 SE can be controlled
with voltage signals coming from remote monitoring
control.
• The signal can have speeds 0 to 8, but not higher
than the maximum fan speed if carbon dioxide or
humidity adjustment is active. See section 3.25 in the
Operating instructions for control panel.
• A signal changes the basic fan speed.
• A signal does not lock the fan speed.This means that
the fan speed can be changed within the range set
at the control panel. Carbon dioxide and humidity
adjustment also work within the range set.
Controlling ventilation with remote
monitoring control system (option)
• Vallox 280 SE can be connected to the remote
monitoring control system with an optional LON and
KNX converter.
• When Vallox 280 SE is connected to the remote
monitoring control system, you have to make sure that
they are compatible.
• You can control the same functions via the remote
monitoring control system as at the control panel.
• The remote monitoring control system operates
in parallel with the control panel and the carbon
dioxide and humidity sensors.
Post-heating
For most of the year, heat recovered from the air extract-
ed is enough to heat the cold air coming from the out-
side to a suitable temperature. If the heat of extract air
is not enough, the air coming from the outside can be
heated with the post-heating unit in the ventilation unit.
The post-heating radiator can be electric (Vallox 280
SE electric/electric) or water-circulating (Vallox 280 SE
electric/VKL). In both cases, you can switch heating on
at the control panel. See section 2.1 in the Operating in-
structions for control panel.
When post-heating is on, the unit automatically adjusts
supply air temperature in accordance with the temper-
ature set.
Supply air constant temperature control
• Vallox 280 SE has a relative post-heating adjustment.
This means that when the temperature set for post-
heating goes down, the on-time of post-heating goes
automatically down in two-minute phases. When the
temperature set exceeds supply air temperature by
more than 2.5 °C, the post-heating radiator is on all
the time.
• The heating radiator heats when the ( ) sign is
displayed.
• Temperature adjustment is only active when the post-
heating function has been switched on.
Supply air cascade adjustment
• It is possible to change supply air temperature
adjustment into cascade adjustment. In this case,
the post-heating radiator directs the temperature of
air coming in based on the temperature of extract
air. See section 3.18 in the Operating instructions for
control panel.
• The programme tries to keep the temperature of
supply air at the value defined by the difference
between extract air and the setpoint as follows:
if extract air is warmer than the value set, the
temperature of supply air is lower than the setpoint
by the difference. If extract air is cooler, supply air is
warmer by the difference. If room temperature (the
temperature of extract air) is 25 °C and the value set
is 24 °C, the aim is to blow 23 °C air into the ventilation
zone. If temperature in the ventilation zone is 24 °C
and the setpoint is 25 °C, the aim is to blow 26 °C air
into the ventilation zone.
• In any case, the aim is to keep the temperature of air
blown into the ventilation zone between 10 and 30 °C.
• You can choose cascade adjustment at the control
panel, and it is active when post-heating has been
switched on.
• The heating radiator heats when the ( ) sign is
displayed.
Heat recovery bypass function
• The bypass function tries to get as cool supply air as
possible to the ventilation zone by comparing the
measurement data of the outdoor air sensor and the
extract air sensor.
• The heat recovery cell is bypassed when the post-
heating function is off and outdoor air temperature
is below the operating temperature set for the heat
recovery cell by two degrees and extract air is warmer
than outdoor air.
• The operating temperature of heat recovery bypass
can be changed within the range of 0...25 °C. See
section 3.15 in the Operating instructions for control
panel.
Post-heating indicator light
8
Vallox
280SE GENERAL OPERATING INSTRUCTIONS
OPERATING INSTRUCTIONS

Heat recovery cell defrost function and
preheating
• The defrost function prevents the freezing of the heat
recovery cell and thereby ensures proper ventilation
even during cold periods.
• The unit comes standard with an electric preheating
unit in order to minimise the momentary stopping of
the supply air fan. This ensures that the supply air flow
coming through the unit is as even as possible.
• The preheating unit switches on when the
temperature of exhaust air goes down to the value
set for defrost preheating temperature of the heat
recovery cell (factory setting +5 °C). See section 3.24
in the Operating instructions for control panel.
• The preheating unit switches off when exhaust air has
warmed to the value set as hysteresis (by hysteresis;
factory setting +3 °C). See section 3.22 in the
Operating instructions for control panel.
• The operation of the preheating unit requires that the
setpoint for exhaust air temperature is higher than the
setpoint for stopping the supply air fan.
• If the heating power of the preheating unit is not
enough, defrost is implemented by stopping the
supply air fan.The stopping function is controlled on
the basis of the measurement data coming from the
exhaust air temperature sensor located after the heat
recovery cell.
• The supply air fan stops when the temperature
of exhaust air goes down to the value set as the
stopping temperature of the supply air fan for cell
defrost (factory setting +3 °C). See section 3.23 in the
Operating instructions for control panel. The supply
air fan starts when exhaust air has warmed to the
value set as hysteresis (by hysteresis, factory setting
+3 °C). See section 3.22 in the Operating instructions
for control panel.
Defrost function of water-circulating post-
heating unit
• The defrost function tries to prevent the water-
circulating post-heating unit from freezing.The
automatic function stops the supply and extract air
fans of the unit when outdoor air temperature is less
than 0 °C and supply air temperature less than 7°C.
In addition, the control valve opens fully.An error
message “RISK OF FREEZING” is shown in the control
panel.
• The fans start automatically when supply air
temperature is more than 10 °C.
Maintenance reminder
• The maintenance timer of the unit lights the
maintenance reminder symbol ( ) on the main
display of the control panel at a selected interval
(factory setting 4 months). See section 3.21 in the
Operating instructions for control panel.
• The interval can be set between 1 and 15 months.
• Acknowledge the maintenance reminder symbol
at the control panel as shown in section 3.10 in the
Operating instructions for control panel.
Air filtering and filter guard function
(option)
Vallox 280 SE has coarse filtering of both extract and
supply air before the fans.There are F7- and G4-class
coarse filters on the supply air side and a G4-class
coarse filter on the extract air side. The filters must
be in place in the unit whenever ventilation is in
operation.An F5-class extract air filter is available as
an option.
Filter guard
• When the unit is equipped with pressure difference
switches that monitor the pressure difference of the
supply and/or extract air filter, they light the filter
guard symbol ( ) in the main display whenever the
pressure exceeds the setpoint.The points of the fault
signal relay close at the same time.
• The operating threshold for the pressure difference
switch is adjusted to match the planned ventilation
power position.The threshold can be adjusted at the
controller of the pressure difference switch (see page
15, Setting of pressure difference switch).The factory
setting (275 Pa) corresponds to ventilation power
position 8.
• The maintenance reminder operates normally during
this function.
Maintenance reminder symbol
G4 G4
F7
F5 (option)
9© Vallox - All rights reserved
Vallox
280SE
FAULT SIGNAL RELAY
(REMOTE MONITORING CONTROL)
• The fault signal relay has potential-free contacts
(24 VDC, 1 A).
• The contacts provide information on different fault
states of the unit.
• The alarm of high carbon dioxide content
switches the relay at 1-second intervals.
• In other fault situations, the contacts are closed.
• During the defrost function of the water-
circulating radiator, the contacts of the relay
close and open at 10-second intervals.
GENERAL OPERATING INSTRUCTIONS
OPERATING INSTRUCTIONS

10
Vallox
280SE
FIREPLACE/BOOST FUNCTION
Fireplace switch function
(See section 3.17 in the Operating instructions for control
panel.
• The fireplace switch stops the extract air fan for 15
minutes and creates an overpressure in the ventilation
zone, which makes it easier to light up a fireplace, for
instance.
• You can start the function in the main display of
the control panel by pressing the + and - buttons
simultaneously for 2 seconds.
• You can also start the functions at a separate
automatically resetting push-button switch that has
been wired from the connection box of the unit to the
wall of a room with a fireplace.After each pressing
of the button, the stopping function continues for 15
minutes. (The switch is not included in the delivery.)
• During the function, there is a fireplace/boost switch
symbol ( ) in the main display.
NOTE! When the extract air fan starts, draught in the
furnace may get weaker! In winter, this may disturb the
winter function of the unit. The situation reverts to nor-
mal in a short while after the fireplace switch function
has stopped.
Boost switch function
(See section 3.17 in the Operating instructions for control
panel.
• The boost switch raises fan speed to the maximum
fan speed set for 45 minutes.
• You can start the function in the main display of
the control panel by pressing the + and - buttons
simultaneously for 2 seconds.
• You can also start the functions at a separate
automatically resetting push-button switch that has
been wired from the connection box of the unit to the
wall of a classroom, for instance.After each pressing
of the button, the boost function continues for 45
minutes.
• During the function, there is a fireplace/boost switch
symbol ( ) in the main display.
Fireplace/boost switch symbol
GENERAL OPERATING INSTRUCTIONS
OPERATING INSTRUCTIONS

11 © Vallox - All rights reserved
Vallox
280SE
Start button
Use the button to turn the ventilation unit on and
off. When the indicator is lit, the unit is on.
Carbon dioxide adjustment
Use the button to turn carbon dioxide adjustment
on and off. When the indicator is lit, the adjustment
is on.
Humidity adjustment
Use the button to turn humidity adjustment on and
off. When the indicator is lit, the adjustment is on.
Post-heating
Use the button to turn post-heating on and off.The
summer function is active when the indicator is
not lit.
Scroll up
Use the button to scroll the displays upwards.
Scroll down
Use the button to scroll the displays downwards.
Add button
Use the button to make the values bigger.
Decrease button
Use the button to make the values smaller.
3
4
15
6
7
8
1.1 Keyboard
2
POWER FAILURE
In case of power failure, the unit will start after the failure at
the basic fan speed.The adjustments and setpoints cho-
sen remain in the memory of the unit after the failure.
MAIN DISPLAY
Fan speed can be changed in this display with the +
and – buttons (see section 1.1, figure items 7 and 8).
Fan speed (3).
Supply air temperature (21°C).
Time.
Filter guard alarm.
Maintenance reminder alarm.
Fireplace/boost switch on.The fireplace/boost switch
is switched on in this display by pressing the + and -
buttons down simultaneously for 2 seconds.
Week-clock control on.
3
21
10:20
Ventilation operating and function menus
Main display
2.1. Main display and changing of fan speed
2.2. Moving to Settings menu
To settings menu
see manual
You can make the control panel
move to the Settings menu by
pressing the + and - buttons simul-
taneously. In the Settings menu, you
can change the setpoints of the
ventilation unit.
2.3. Week-clock control
Week program
on
You can turn week-clock control on
by using the + button and off by us-
ing the - button.Week-clock control
is on when the week-clock control
symbol is seen in the main display.
In week-clock control, the basic fan
speed of the ventilation unit and the
temperature of supply air are adjust-
ed as stated in section 3.4.
2.4. Content display
RH 35% RH2 40%
CO2 0821 PPM
The content display shows the hu-
midity content and carbon dioxide
content. Requires the corresponding
sensors (options).
2.5. Temperature display
Out 20 in 20
Sup. 20 Exh. 20
The temperature display includes
the following temperatures: outdoor
air, indoor air, supply air and exhaust
air.The accuracy of the temperature
sensors is ±2 °C.
2.6. Supply air temperature setting
Temp. setting
20C
You can change the supply air
temperature setting by using the +
and - buttons.
1. USE OF CONTROL PANEL
2. OPERATING MENU
Displays of the operating menu (items 2.1. through 2.6.) can be scrolled with the scrolling buttons (see section 1, figure references 5 and 6).
3. SETTINGS MENU You can reach the Settings menu from the Operating menu as described in section 2.2.
Displays of the Setting menu (sections 2.1. through 3.26.) can be scrolled with the scrolling buttons
(see section 1, figure references 5 and 6).
3.1. Setting basic fan speed
MIN speed
1
Choose desired basic fan speed
(minimum fan speed) with the +
and - buttons.Active when week-
clock control is not on.Week-clock
control changes this speed.
3.2. Moving to Operating menu
To Main menu
press + and –
You move back to the Operating
menu by pressing the +
and - buttons simultaneously.
1
21C 10:20
OPERATING INSTRUCTIONS FOR CONTROL PANEL
OPERATING INSTRUCTIONS

12
Vallox
280SE
3.3. Clearing week programme
Erase wk. prog.
Press + and -
The whole week programme can be
cleared by pressing the + and - but-
tons simultaneously.
3.4. Programming week programme
Adjust wk. prog.
Press + and -
You reach the week-clock program-
ming mode by pressing the + and
- buttons simultaneously. See instruc-
tions in section 4.1.
3.5 . Changing time
Adjust time
Press + and -
You reach the time changing mode
by pressing the + and - buttons
simultaneously. See the separate
instruction 4.2.
3.6. Operating mode of maximum speed setting
MAX speed limit
with adjustments
The setting of maximum fan speed
can be chosen to operate either
with carbon oxide adjustment, with
humidity adjustment or always.
Make the selection with the + and
- buttons.
3.7. Choice of language version
Kieli / Language
English
Choose the desired language (Ger-
man, English, Swedish, French or
Finnish) with the + and - buttons.
3.8. Restoring factory settings
Factory settings
see manual
The general factory settings are
restored by pressing the + and - keys
simultaneously.
You have to check for each unit that the settings are in accordance
with the factory settings for the unit.
Pay special attention to unit model (electric/water) and change it if
needed as described in section 3.20.
3.9. Adjustment interval
Adjust interval
10
CO2adjustment setpoint is selected
with the + and - buttons.The adjust-
ment interval is in minutes.
3.10. Acknowledgement of maintenance reminder
Mainten. reset
Press + and –
Acknowledge the maintenance
reminder by pressing the + and
- buttons simultaneously.The mainte-
nance reminder symbol ( ) is then lit
off in the main display.
3.11. Contrast of control panel display
Display contrast
05
You can change the contrast of
the control panel with the + and -
buttons.
3.12. Control panel address
Panel address
1
You can change the address of the
control panel with the + and - but-
tons.Two control panels cannot have
the same address. If two control
panels have the same address, they
move to the bus fault state and do
not work.
3.13. Adjusting direct-current fan on the extract air side
DC fan, exhaust
100%
Choose the desired setpoint for the
direct-current fan with the + and - but-
tons.You can lower the rotation speed
of the extract air fan by reducing
the percent value. If the ventilation
unit has alternating-current fans, this
adjustment has no impact on the
operation of the unit.
3.14. Adjusting direct-current fan on the supply air side
DC fan, supply
100%
Choose the desired setpoint for the
direct-current fan with the + and - but-
tons.You can lower the rotation speed
of the supply air fan by reducing the
percent value. If the ventilation unit
has alternating-current fans, this ad-
justment has no impact on the oper-
ation of the unit.
3.15. Changing operating temperature
for heat recovery cell bypass n
Cell bypass
10C
Choose the desired cell bypass tem-
perature with the + and - buttons. If
outdoor temperature is lower than
the temperature for cell bypass, the
summer/winter damper is in the win-
ter position.
3.16. Basic humidity level setpoint
Basic %RH level
40%
You can choose the desired value
with the + and - buttons when manu-
al adjustment has been chosen for
Rh (Rh = humidity) level setting (sec-
tion 3.19.).
3.17. Operating mode of fireplace/boost switch
Switch type
fireplace switch
Choose either fireplace or boost
switch with the + and - buttons.
3.18. Choosing cascade adjustment
for supply air temperature
Cascade adjust
off
You choose cascade adjustment on
or off with the + and - buttons.
3.19. Choosing basic humidity level
Rh-level setting
automatic
You can choose either automatic or
manual basic humidity level. Make
the selection with the + and - buttons.
3.20. Choosing post-heating for unit
Radiator type
Electric rad.
You can choose either water-circu-
lating radiator or electric radiator in
accordance with the post-heating
radiator, using the + and - buttons.
Note! Choosing the wrong type of post-heating causes a faulty
post-heating function.
3.21. Choosing maintenance reminder interval
Maintenance rem.
04
Choose the interval for the mainte-
nance reminder with the + and - but-
tons.The interval is in months.
3.22. Heat recovery cell defrost hysteresis
Hysteresis
03 C
Choose hysteresis for the defrost of
the heat recovery cell with the + and
- buttons.
3.23. Stopping temperature of supply air fan
for heat recovery cell defrost
Supply fan stop
05 C
Choose the stopping temperature of
supply air fan for the heat recovery
cell defrost with the + and - buttons.
3.24. Heat recovery cell defrost preheating temperature
Preheater
07 C
Choose the preheating temperature
for the heat recovery cell defrost with
the + and - buttons.
OPERATING INSTRUCTIONS FOR CONTROL PANEL
OPERATING INSTRUCTIONS

13 © Vallox - All rights reserved
Vallox
280SE
4. WEEK-CLOCK CONTROL
4.1. Programming week programme
The week programme can be used to adjust the desired fan speed
(basic fan speed) and supply air temperature for each hour in a day
on seven days a week.The week programme changes the adjustments
made manually.
Carbon dioxide and humidity adjustment can change fan speed higher,
but never lower than the basic fan speed adjusted in the week pro-
gramme.
EXAMPLE: MONDAY
You want to decrease fan speed to speed 2 and supply air temperature
to 17 °C during the working hours (07 through 16 hours).After that you
want to raise fan speed to speed 4 and supply air temperature to 20
°C.You want to boost fan speed for the evening to speed 6 during the
taking of a sauna bath (19 through 21 hours) and decrease it after that
to speed 4.
4.2. Changing time
Move the cursor with the arrow keys and change the values with the + or
- button. Finally, acknowledge the changes by choosing Exit.
5. FACTORY SETTINGS
Basic fan speed = 1
Maximum fan speed = 8
Carbon dioxide adjustment (CO2) = 900 ppm CO2
Adjustment interval = 10 min.
Freezing protection (cell) = 3 °C
Freezing protection hysteresis = 3 °C
Preheating setting = 5 °C
Maintenance reminder = 4 months
Cell bypass = 12 °C
Cascade adjustment = not in use
Humidity level (RH level) setting = automatic
Switch type = boost switch
3.25. Changing carbon dioxide adjustment setpoint
CO2 setting
0900 PPM
CO2adjustment setpoint is selected
with the + and - buttons.
Move the cursor with the arrow keys
and change the values with the +
or - button. Note that the Exit acknowl-
edgement is done at the end of pro-
gramming by taking the cursor under
the work Exit and pressing either + or -.
Changes to fan speed (Sp) and
supply air temperature (tmp) are
only made for the hours to which the
change applies. In other cases, use N
(no change to previous).
Monday (d=1), time 07:00 (hr=7),
fan speed 2 (Sp=2), supply air temper-
ature 17 °C (tmp=17).
Use the cursor to move the following
hour.
Monday (d=1), time 16:00 (hr=16),
fan speed 4 (Sp=4), supply air temper-
ature 20 °C (tmp=20).
Use the cursor to move the following
hour.
Monday (d=1), time 19:00 (hr=19),
fan speed 6 (Sp=6), supply air temper-
ature no change (tmp =N).
Use the cursor to move the following
hour.
Monday (d=1), time 21:00 (hr=21),
fan speed 4 (Sp=4), supply air temper-
ature no change (tmp=N).
Use the cursor to move to the following
day.
3.26. Choosing maximum fan speed
MAX speed
8
Choose the desired maximum fan
speed with the + and - buttons. Max-
imum fan speed is active either with
adjustments or always. See section
3.6. Operating mode of maximum
speed setting.
Corresponding changes have to be done separately for each day. Finally,
leave the programming mode by selecting Exit. If you wish, you can clear
the week programme as described in section 3.3. and start programming
from the beginning.You can see the values programmed by choosing a
day and browsing hours with the + or - key.
Monday (day=1), hours 15 (hour=15),
minutes (min=30).
Time is kept during power failures.
(See section 1.1., figure references 5
and 6.)
d hr sp tmp
10 N N Exit
d hr sp tmp
17 2 17 Exit
d hr sp tmp
116 4 20 Exit
d hr sp tmp
119 6 N Exit
d hr sp tmp
121 4 N Exit
CURSOR
D DAY 1...7
1 = MONDAY, 2 =
TUESDAY ETC.
H HOUR
0...23
SP FAN SPEED
1...8
TEM SUPPLY AIR TEMPERATURE
10..30 °C
EXIT ACKNOWLEDGING
THE SETTING AND EXITING
N NO CHANGE TO
THE SETTING FOR
THE PREVIOUS HOUR
CURSOR
D DAY 1...7
1 = MONDAY, 2 = TUESDAY ETC.
H HOUR 0...23
M MINUTES 0... 60
EXIT ACKNOWLEDGING
THE SETTING AND EXITING
STARTING SITUATION
day hour min
115 30 Exit
OPERATING INSTRUCTIONS FOR CONTROL PANEL
OPERATING INSTRUCTIONS

14
Vallox
280SE MAINTENANCE
MAINTENANCE INSTRUCTIONS
General information
• The unit has a two-part door. When you detach the
upper door, the safety switch (T) turns power off.The
upper door is always opened first and closed last.
• If you want to carry out maintenance activities only
for the filters, you only need to detach the upper door.
When you carry out other maintenance steps, you
have to detach both doors.
Filters
• The unit comes standard with G4-class coarse filters
for outdoor and extract air and an F7-class fine filter
for supply air.
Optionally, you can also get an F5-class fine filter
for extract air.The filters have to be cleaned or
replaced at regular intervals (2 to 4 times a year) and
depending on how dirty they are.
• If the unit has been equipped with filter guards, the
symbol () in the main display of the control panel or
in remote monitoring control indicates when filters
need to be cleaned and replaced with new ones.
Maintenance of filters:
• Open the fastening screws of the upper door of the
unit.
• Lift the door off.
• Check if the filters are clean.
• You can wash the G4-class (blue and white) filter with
+25 °C...+ 30 °C water and dishwashing detergent. It
must not be cleaned or dried hard-handedly but by
pressing gently.
• F5- and F7-class filters (fibre filters) cannot be cleaned,
but you can clean them cautiously by blowing with
compressed air to the direction in which the filter
gets dirty. (F5 is an option). When needed, the filters
have to be replaced. The recommended interval,
depending on circumstances, is 2 to 4 times a year.
Other cleaning
• During maintenance, also check the general
cleanliness of the unit inside: preheating and post-
heating units, bottom tank and inner envelope.
Remove dirt with a vacuum cleaner, brush, damp
cloth or similar.
• It is strongly forbidden to let water come into
electric devices!
Heat recovery cells
• The heat recovery cells in the unit can get dirty even
if there are filters. Because of this, the cleanliness of
the cells has to be checked at regular intervals, about
once a year. It is recommended to do the checking
during maintenance.
• You can detach the cells from the unit by pulling the
ears at the end plates of the cells. Dirty cells can be
cleaned either by spraying a dishwashing detergent
on the cells first or by sinking the cells in water
containing a dishwashing detergent.After this, you
can use a water shower to flush them. Let the cells
get dry and then mount them back in place. When
mounting the cells back in place, note the “this side
up” stickers on the cells.
REMEMBER!
Clean the filters when needed.The recommended
replacement interval is 2 to 4 times a year.The need
depends on the cleanliness of outdoor and indoor air.
Set the maintenance reminder interval according to
your need. See section 3 in the Operating instructions.
G4 G4
F7
F5 (option)
MAINTENANCE

PRESSURE DIFFERENCE SWITCH ADJUSTMENT VALUES
Ventilation power position Supply air filter F7 Pressure difference switch
(PDS1)
Extract air filter G4 Pressure difference
switch (PDS2)
Extract air filter G4 + F5 Pressure difference
switch (PDS2)
1 100 100 125
2 125 125 150
3 150 150 175
4 175 175 225
5 200 200 250
6 225 225 300
7 250 250 325
8 275 275 350
15 © Vallox - All rights reserved
Vallox
280SE
MAINTENANCE
Fans
• It is a good idea to check the cleanliness of the
fans during the maintenance of the filters and heat
recovery cells. Clean them when needed.
• You can detach the fans by opening the 4 fastening
screws and the quick couplings of the conductors.
Fan blades can be cleaned by blowing them
cautiously with compressed air, brushing each blade
with a brush or wiping with a damp cloth so clean
that the fans stay in balance.Also the hoods of the
fans have to be cleaned.
• It is strictly forbidden to rinse water into the fan motor!
Condensing water connections
• During maintenance also the bottom tank and the
condensing water connections are checked.
• To see the condensing water connections, detach the
base plate. If a condensing water tank is used, bring it
out by pulling it forward.You can detach the tank for
emptying and cleaning.
• When the condensing water outlet is used, check its
condition and make sure it has not clogged up.
Pressure difference switch
Setting of pressure difference switch
You can change the operating threshold for the pressure
difference switch as follows:
Detach Vallox 280 from the electrical network by cutting
off supply voltage at the distribution panel, for instance.
1. Detach the upper door of the unit.
2. Detach the cover of the electrical box inside the unit.
3. Detach the cover of the pressure difference switch
and turn the adjusting wheel to the value desired
(see the figure and the adjoining table).
Fastening screw
(4 screws)
Quick
couplings
Supply air fan
Extract air fan
Fastening screw
(4 screws)
Quick couplings
Pressure
difference switch
Cover of electric box
Detaching of pressure
difference switch cover
MAINTENANCE

Symptom Cause Do this
1Outdoor coming to the residence is
cold.
• Air cools down in the ducts in the attic.
• The heat recover cell is frozen,so extract air cannot
heat outdoor air.
• The post-heating radiator does not work.
• The extract air filter or cell has clogged up.
• The basic ventilation adjustment has not been done.
• Check the insulation in the ducts in the attic.
• If the heat recovery cell is frozen, check the setpoint for freezing
protection.You can raise the setpoint for freezing protection by 1
or 2 °C,or you can bend the sensor closer to the cell,which makes
the supply air fan stop earlier. See section 3.23 in the Operating
instructions for control panel.Melt the cell before closing the door.
• If the post-heating radiator does not work, check if the operation is
prevented by the thermal overload protector:press the reset button of
the thermal overload protector and measure supply air temperature
inside the unit when the door is closed. If the radiator does not work
after these steps, contact a maintenance shop.
• Check the cleanliness of the filters and the heat recovery cell.
2The supply air fan keeps stopping. • Defrost of the heat recovery cell is in operation.
NOTE! If you lower the setpoint too much, the cell may
freeze.See item 1.
• The fan stops more seldom and the efficiency of the heat recovery cells
improves when the setpoint is lowered by 1 or 2 °C. See section 3.22 in
the Operating instructions for control panel.
3The supply air fan stops and starts
too often.
• The difference between the stopping and starting
temperatures is too small.
• The preheating radiator does not work.
• Raise the difference between the stopping and starting temperatures
by 1 or 2 °C to make the interval between the stopping and starting of
the supply air fan longer.See sections 3.22 and 3.23 in the Operating
instructions for control panel.
• If the post-heating radiator does not work, check if the operation is
prevented by the thermal overload protector:press the reset button of
the thermal overload protector and measure supply air temperature
inside the unit before the heat recovery cell when the door is closed.
If the radiator does not work after these steps,contact a maintenance
shop.
4The maintenance reminder symbol
( ) is shown in the display and the
unit operates otherwise normally.
• The maintenance reminder lights up the maintenance
reminder symbol in the main display of the controller
at intervals of circa 4 months (factory setting).
• You can change the interval. See section 3.21 in the
Operating instructions for control panel.
• Check the cleanliness of the filters and the unit, and clean or replace
the filters when needed.Also check the external grille.
• Acknowledge the maintenance reminder symbol to make it disappear.
See section 3.10 in the Operating instructions for control panel.
5"Faulty exhaust air sensor" text is
shown in the display and the unit is
stopped.
• There is a fault in the extract air sensor. • Contact a maintenance shop: check the sensor mounting and replace
the sensor if needed.
6"Faulty supply air sensor" text is shown
in the display and the unit is stopped.
• There is a fault in the supply air sensor. • Contact a maintenance shop: check the sensor mounting and replace
the sensor if needed.
7"Faulty indoor air sensor" text is shown
in the display and the unit is stopped.
• There is a fault in the freezing protection sensor. • Contact a maintenance shop: check the sensor mounting and replace
the sensor if needed.
8"Faulty outdoor air sensor" text is
shown in the display and the unit is
stopped.
• There is a fault in the outdoor air sensor. • Contact a maintenance shop: check the sensor mounting and replace
the sensor if needed.
9"Bus fault" text is shown in the display
and the unit operates at speed 1
(check fan speed).
• There is a wiring mistake in the carbon dioxide sensor,
control panel or humidity sensor
• Contact a maintenance shop.The connections have to be checked and
repaired if needed.
10 "Freezing risk" text is shown in the
display and the unit is stopped.
• Defrost of the water-circulating radiator is on.
NOTE! If there is no antifreezing compound in the
water of the radiator, the radiator is at a risk of
freezing.
• Immediately sort out the situation.Ask the maintenance shop if there
is any antifreezing compound in the radiator. Check if the circulating
pump is broken,the boiler off or similar.It is possible that the situation
reverts to normal by itself when supply air temperature exceeds 10
degrees,but do not wait to see if this happens.
11 Desired automatic adjustment does
not stay on.
• There is a fault in the humidity or carbon dioxide
sensor. One of the sensors is broken or missing.
• Contact a maintenance shop.The sensor mounting and connections
have to be checked. (Sensors are options.)
12 The unit is not running,the fans do
not rotate and there are no indicator
lights in the control panel.
• The door switch may be broken or the door is not
properly closed.
• No electricity is coming to the unit.A fuse may have
blown.
• The glass-tube fuse protecting the electronics inside
the unit may have blown. (The fuse is located in the
control card behind the protective plate.)
• Check the door switch and the fuses.The unit has a T800 mA glass-tube
fuse.
• When needed, contact a maintenance shop (for checking the glass-
tube fuse,for instance).
13 The unit does not obey the control
panel.
• Detach the power supply fuse in the distribution panel or switch off the
circuit breaker.Wait for 30 seconds and put the fuse back, or switch the
circuit breaker back on. If this does not help, contact a maintenance
shop.
14 "Carbon dioxide alarm" text is shown
in the display and the unit is stopped.
• Carbon dioxide alarm. Carbon dioxide content has
exceeded 5000 PPM for two minutes.May be caused
by a fire, for instance.
• If there is a fire,take necessary action.
• To get the unit back in operation,detach the plug from the wall, wait for
30 seconds and put the plug back.
15 The filter guard symbol ( ) is shown
in the display and the unit operates
otherwise normally.
• T he pressure of the filter guard (pressure difference
switch) has risen above the setpoint.
• Check the cleanliness of the filters and the unit, and clean or replace
the filters when needed.
If there has been a power failure, the unit starts at minimum fan speed.All the other adjustments
and setpoints selected remain in the memory of the unit.
16
Vallox
280SE TROUBLESHOOTING
TROUBLESHOOTING

TECHNICAL DATA
Product codes
Vallox 280 SE electric/electric L
Vallox 280 SE electric/electric R
Vallox 280 SE electric/VKL L
Vallox 280 SE R electric/VKL R
Vallox code
3544300
3544400
3544500
3544600
Air volumes Supply air
Extract air
240 dm3/s, 100 Pa
290 dm3/s, 100 Pa
Electrical connection
Vallox 280 SE electric/electric
Vallox 280 SE electric/VKL
230 V,50 Hz, 400 V,15 A (11.0 A), fixed mounting
230 V,50 Hz, 15.0 A fixed mounting
Degree of protection provided
by enclosures
IP 34
Post-heating radiator
Vallox 280 SE electric/electric
Vallox 280 SE electric/VKL
Electric, 2.5 kW, 11.0 A
VKL water-circulating radiator,5 kW
Preheating radiator
Vallox 280 SE electric/electric
Vallox 280 SE electric/VKL
Electric, 2.5 kW, 11.0 A
Electric, 2.5 kW, 11.0 A
Fans Supply air
Extract air
520 W 3.2 A EC
520 W 3.2 A EC
Efficiency
Annual efficiency
Supply air efficiency
Specific Fan Power SFP
54 % C
74 %
1.7 (175 dm3/s) C
Filters Supply air
Extract air
G4 + F7
G4
Heat recovery Cross-flow cell, h = ca. 60%
Heat recovery bypass Automatic
Weight 206 kg
Ventilation power adjustment Vallox Digit SED controller
Options Humidity sensor
Carbon dioxide sensor
LON converter
KNX converter
Filter guard (pressure difference switch)
MAIN PARTS
1 Supply air fan
2 Extract air fan
3 Heat recovery cells
4 Heat recovery bypass
5 Supply air filter F7
6 Extract air filter G4
7 Outdoor air filter G4
8 Condensing water tank
L model in the figure
In the R model, the parts are in a mirror image.
2
9
9 Condensing water outlet
10 Electrical connection
penetrations
11 Measuring tubes
12 Preheating radiator
(electric, 2500 W)
13 Post-heating radiator
(electric, 2500 W or VKL)
1
5
13
4
12
7
11
10
6
8
3
17 © Vallox - All rights reserved
Vallox
280SE
TECHNICAL DATA
TECHNICAL DATA
DIMENSIONS AND DUCT OUTLETS
DIMENSIONS L model R model
DUCT OUTLETS
A Exhaust air out
B Extract air from dwelling
C Supply air to dwelling
D Outdoor air to unit
ELECTRICAL CONNECTIONS
8 Supply cable
- distribution panel
9 Connection cable
- control panel
- CO2sensor
- LON/KNX converter
10 Connection cable
- humidity sensor
- remote monitoring control
PIPE CONNECTIONS
4 Return water from radiator
5 Supply water to radiator
DUCT OUTLETS
A Outdoor air to unit
B Supply air to dwelling
C Extract air from dwelling
D Exhaust air out
ELECTRICAL CONNECTIONS
1 Supply cable
- distribution panel
2 Connection cable
- control panel
- CO2sensor
- LON/KNX converter
3 Connection cable
- humidity sensor
- remote monitoring control
PIPE CONNECTIONS
6 Return water from radiator
7 Supply water to radiator
1370
1100
10 9 8 7 6 5 4 3 2 1
A
BC
D
187
665
220220
222 282 222 187

SOUND VALUES
Sound power level going from the unit
to the supply air ductwork by octave band Lw, d B
Sound power level going from the unit
to the extract air ductwork by octave band Lw, dB
ADJUSTMENT POSITION/AIR FLOW dm3/s ADJUSTMENT POSITION/AIR FLOW dm3/s
Adjustment
position
24682468
Air flow dm3/s 128 164 202 238 171 210 242 261
Octave
band
medium
frequency
Hz
63 78 82 84 86 75 82 84 85
125 63 69 73 76 73 77 81 86
250 60 66 70 74 60 65 69 72
500 46 50 54 57 47 51 55 57
1000 43 47 49 51 43 47 50 51
2000 39 43 48 51 40 45 49 52
4000 29 34 38 42 30 35 39 41
8000 17 24 28 31 19 25 29 32
LW,dB
LWA, dB(A)
78 82 84 87 77 83 86 89
56 61 64 68 59 63 67 71
A-weighted sound pressure level dB (A) coming from the unit through the envelope in the rooms where the unit has been installed (10 m2sound absorption)
ADJUSTMENT POSITION/AIR FLOWS (supply/extract)
Adjustment
position
2468
Air flow dm3/s 119/171 149/209 177/239 208/260
LpA, dB (A) 45 50 53 55
60 80 100 120 140 160 180 200 220 240 260 280 300 320
100
150
200
250
50
300
350
SFP, kW / (m3/s) 1.5
SFP, kW / (m3/s) 2.0
E8
E7
E6 S8
E5
S7
S6
E4
S5
E3
S4
E2
E1 S3
S2
S1
8 = 10.00 V
7 = 8.20 V
6 = 7.70 V
5 = 7.15 V
4 = 6.55 V
3 = 5.98 V
2 = 5.50 V
1 = 5.12 V
FAN INPUT POWER
Fan
speeds
Extract
air flow
dm3/s
Total input
power of
fans
W
1 130 150
2 150 180
3 170 250
4 190 320
5 210 405
6 230 510
7 250 620
8 290 830
SUPPLY/EXTRACT
AIR VOLUMES
Vallox 280 SE electric/electric
Supply G4 + F7, extract G4
VALLOX 280 SE ELECTRIC/ELECTRIC
Supply air Extract air
Recommended
operating range
Air volume flow rate (dm3/s)
Pressure loss in ductwork.Total pressure (Pa)
Total input power of fans (kW)
dimensioning air flow (m3/s)
SFP =
SFP (Specific Fan Power)
recommended value
<2.0 kW/(m3/s)
S = Supply air
E = Extract air
18
Vallox
280SE TECHNICAL DATA
TECHNICAL DATA
MEASURING POINTS
Measuring points after the outlet collar.
Fan curves indicate the total pressure
available for duct losses.
(HR = Heat recovery cell)
E
HR2
HR1
S

SOUND VALUES
Sound power level going from the unit
to the supply air ductwork by octave band Lw, d B
Sound power level going from the unit
to the extract air ductwork by octave band Lw, dB
ADJUSTMENT POSITION/AIR FLOW dm3/s ADJUSTMENT POSITION/AIR FLOW dm3/s
Adjustment
position
24682468
Air flow dm3/s 128 164 202 238 171 210 242 261
Octave
band
medium
frequency
Hz
63 78 82 84 86 75 82 84 85
125 63 69 73 76 73 77 81 86
250 60 66 70 74 60 65 69 72
500 46 50 54 57 47 51 55 57
1000 43 47 49 51 43 47 50 51
2000 39 43 48 51 40 45 49 52
4000 29 34 38 42 30 35 39 41
8000 17 24 28 31 19 25 29 32
LW,dB
LWA, dB(A)
78 82 84 87 77 83 86 89
56 61 64 68 59 63 67 71
A-weighted sound pressure level dB (A) coming from the unit through the envelope in the rooms where the unit has been installed (10 m2sound absorption)
ADJUSTMENT POSITION/AIR FLOWS (supply/extract)
Adjustment
position
2468
Air flow dm3/s 119/171 149/209 177/239 208/260
LpA, dB (A) 45 50 53 55
60 80 100 120 140 160 180 200 220 240 260 280 300 320
100
150
200
250
50
300
350
SFP, kW / (m3/s) 1.5
SFP, kW / (m3/s) 2.0
8 = 10.00 V
7 = 8.20 V
6 = 7.70 V
5 = 7.15 V
4 = 6.55 V
3 = 5.98 V
2 = 5.50 V
1 = 5.12 V
E8
E7
E6
S8
E5
S7
S6 E4
S5
E3
S4 E2
E1
S3
S2
S1
FAN INPUT POWER
Fan
speeds
Extract
air flow
dm3/s
Total input
power of
fans
W
1 130 150
2 150 180
3 170 250
4 190 320
5 210 405
6 230 510
7 250 620
8 290 830
SUPPLY/EXTRACT
AIR VOLUMES
Vallox 280 SE ELECTRIC/VKL
Supply G4 + F7, extract G4
VALLOX 280 SE ELECTRIC/VKL
Air volume flow rate (dm3/s)
Pressure loss in ductwork.Total pressure (Pa)
Total input power of fans (kW)
dimensioning air flow (m3/s)
SFP =
SFP (Specific Fan Power)
recommended value
<2.0 kW/(m3/s)
S = Supply air
E = Extract air
Recommended
operating range
19 © Vallox - All rights reserved
Vallox
280SE
TECHNICAL DATA
TECHNICAL DATA
Supply air
MEASURING POINTS
Measuring points after the outlet collar.
Fan curves indicate the total pressure
available for duct losses.
(HR = Heat recovery cell)
E
HR2
HR1
S

SOUND VALUES
Sound power level going from the unit
to the supply air ductwork by octave band Lw, d B
Sound power level going from the unit
to the extract air ductwork by octave band Lw, dB
ADJUSTMENT POSITION/AIR FLOW dm3/s ADJUSTMENT POSITION/AIR FLOW dm3/s
Adjustment
position
24682468
Air flow dm3/s 99 123 159 199 136 158 186 218
Octave
band
medium
frequency
Hz
63 68 72 75 78 68 70 75 78
125 51 57 61 65 62 66 71 73
250 39 45 50 55 42 46 50 53
500 24 30 36 42 28 32 36 41
1000 11 23 31 13 21 27 32
2000 22 9 25
4000 19
8000
LW,dB
LWA, dB(A)
68 72 75 78 69 72 77 79
43 48 51 55 48 51 56 58
A-weighted sound pressure level dB (A) coming from the unit through the envelope in the rooms where the unit has been installed (10 m2sound absorption)
ADJUSTMENT POSITION/AIR FLOWS (supply/extract)
Adjustment
position
2468
Air flow dm3/s 122/151 153/186 183/215 218/239
LpA, dB (A) 42 47 50 53
20
100
150
200
250
50
300
350
40 60 80 100 120 140 160 180 200 220 240 260 280 300 320
SFP, kW / (m3/s) 2.0
SFP, kW / (m3/s) 2.5
E7
E6
S8
E5
S7
S6
E4
S5
E3
S4
S3
S2
S1
E2
E1
E8
FAN INPUT POWER
Fan
speeds
Extract
air flow
dm3/s
Total input
power of
fans
W
1 90 110
2 110 140
3 130 180
4 150 240
5 170 320
6 190 400
7 210 480
8 250 680
SUPPLY/EXTRACT
AIR VOLUMEST
Vallox 280 SE
Vallox 280 SE + silencer unit
Supply G4 + F7, extract G4
VALLOX 280 SE + SILENCER UNIT
Air volume flow rate (dm3/s)
Pressure loss in ductwork.Total pressure (Pa)
Total input power of fans (kW)
dimensioning air flow (m3/s)
SFP =
SFP (Specific Fan Power)
recommended value
<2.0 kW/(m3/s)
S = Supply air
E = Extract air
Supply air
MEASURING POINTS
Measuring points after the outlet collar.
Fan curves indicate the total pressure
available for duct losses.
(HR = Heat recovery cell)
E
HR2
HR1
S
Recommended
operating range
20
Vallox
280SE TECHNICAL DATA
TECHNICAL DATA