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.
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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