Vallox DIGIT2 SE VKL Scheda tecnica

• 1.09.395E

• 9.2.2011

• Code 3550 SE

INSTRUCTIONS FOR USE AND MAINTENANCE

DIGIT SED

ELECTRONIC CONTROLLER

WITH LCD DISPLAY

MODELS:

VALLOX DIGIT2 SE

VALLOX DIGIT2 SE VKL

VALLOX DIGIT2 SE MLV VKL

VALLOX DIGIT2 SE MLV electric

Vallox

2Digit

VALLOX DIGIT2 SE models

Code: 3550 SE

Models: VALLOX DIGIT2 SE, VALLOX DIGIT2 SE VKL,

VALLOX DIGIT2 SE MLV VKL, VALLOX DIGIT2 SE MLV electric

VALLOX DIGIT2 SE

• Preheating radiator: electric, 1200 W

• Post-heating radiator: electric, 1200 W

VALLOX DIGIT2 SE VKL

• Preheating radiator: electric, 1200 W

• Post-heating radiator: liquid radiator

VALLOX DIGIT2 SE has been initially adjusted

for normal circumstances in your home. Venti-

lation adjustment is needed mainly in the

following circumstances:

1. THREE QUESTIONS ABOUT VENTILATION

1.1. Why is air replaced in dwellings? ................................................. p. 3

1.2. What are the characteristics of adequate ventilation? ...................... p. 3

1.3. How much air is replaced? ........................................................... p. 3

2. INSTRUCTIONS FOR USING VALLOX DIGIT2 SE

2.1. Making the unit ready for operation ............................................... p. 4

2.2. Ventilation control ........................................................................ p. 4

2.3. Ventilation control with control panel .............................................. p. 4

2.4. Ventilation control with carbon dioxide sensor ................................. p. 5

2.5. Ventilation control with humidity sensor .......................................... p. 5

2.6. Ventilation control with voltage or current signal .............................. p. 6

2.7. Ventilation control with remote monitoring system ............................ p. 6

2.8. Post-heating ................................................................................ p. 6

2.9. Supply air constant temperature control .......................................... p. 6

2.10. Supply air cascade control ........................................................... p. 6

2.11. Heat recovery bypass function ...................................................... p. 6

2.12. Heat recovery antifrost function ..................................................... p. 7

2.13. Maintenance reminder ................................................................. p. 7

2.14. Filter guard function ..................................................................... p. 7

2.15. Antifreeze function in water-circulating post-heating unit ................... p. 7

2.16. Fireplace/booster switch ............................................................. p. 8

2.17. Fault signal relay ......................................................................... p. 8

2.18. Air filtering ................................................................................. p. 8

3. CONTROL PANEL

3.1. Instructions for use ....................................................................... p. 9

3.2. Operating menu .......................................................................... p. 9

3.3. Settings menu .............................................................................. p. 10

3.4. Week clock control ...................................................................... p. 12

3.5. Factory settings ........................................................................... p. 12

4. MAINTENANCE INSTRUCTIONS

4.1. Filters ......................................................................................... p. 13

4.2. Fans and post-heating radiator ...................................................... p. 14

4.3. Filter guard ................................................................................. p. 14

4.4. Condensing water ....................................................................... p. 14

5. TROUBLESHOOTING ...................................................................................p. 15

VALLOX DIGIT2 SE

TABLE OF CONTENTS

2© VALLOX • We reserve the right to make changes without prior notice.

EVERYDAY QUICK GUIDE

NOTE!

Never switch ventilation off,

because ventilation keeps indoor air

quality uniform and removes gases

and dust emanating from the

structures.

• Taking a bath:

Boost ventilation in bathing and washing

facilities in order to ensure that the rooms

get dry as quickly as possible. It is advisab-

le to have boosted ventilation on for 2 to 3

hours after taking a sauna bath, unless au-

tomatic adjustment based on humidity con-

tent is used.

• Washing and drying clothes:

Boost ventilation in washing and drying

rooms during the activity, unless automatic

adjustment based on humidity content is

used.

• Sleeping:

Ventilation in a bedroom has to be suffi-

cient throughout the night. The level is cor-

rect when air does not smell fusty when

you enter the room in the morning. If the

carbon dioxide content of a room is moni-

tored and ventilation is adjusted according-

ly, air will always be fresh.

• Empty dwelling:

To save energy, ventilation can be adjusted

to the minimum level.

• Cooking:

If the ventilation unit is connected to a coo-

ker hood, boost ventilation during cooking.

The most common way to abate coo-

king fumes is to have a separate

cooker hood.

VALLOX DIGIT2 SE MLV VKL

• Preheating radiator: liquid radiator

• Post-heating radiator: liquid radiator

VALLOX DIGIT2 SE MLV electric

• Preheating radiator: liquid radiator

• Post-heating radiator: electric, 1200 W

1. THREE QUESTIONS ABOUT VENTILATION

1.1. Why is air replaced in dwellings?

Good ventilation promotes healthy living for both residents and the building. Air in a dwelling needs to

be replaced in order to remove humidity brought about by living as well as impurities

emanating from structures and human bodies. Impurities of indoor air include carbon

dioxide, formaldehyde, radon and other gases as well as dust.

Mechanical ventilation is needed in order to be able to adjust air circulation as needed by

the residents. In a tightly sealed house, air does not circulate sufficiently by natural means.

Even in a poorly sealed house air is only replaced because of differences between indoor

and outdoor air temperatures, or because of winds. This means that ventilation is dependent

on weather conditions and cannot be regulated.

It is especially important that humidity and carbon dioxide content of the indoor air stay at a

healthy level. Recommended humidity content of good indoor air is approximately 45%.

Humidity content is lower in winter and higher in summer and autumn. Dust mites thrive in

indoor air if humidity exceeds 50%, and if humidity stays at over 60% for a long time in

winter, water condenses in the cold structures of the house and mould starts to form.

The recommended maximum carbon dioxide content in good indoor air is circa 1,000 ppm.

1.2. What are the characteristics of adequate ventilation?

• Indoor air stays fresh in all the rooms of the dwelling, also in bedrooms during night.

Without adequate ventilation, carbon dioxide content tends to rise high especially in

bedrooms.

• The bathroom and the sauna get dry quickly.

• During the heating season, the windows and other outer wall structures remain dry.

• Humidity in indoor air is not condensed in the ventilation ducts.

• Air is fresh in the toilet as well.

1.3. How much air is replaced?

For air to be clean to breathe, it has to be replaced with outdoor air every two hours.

In a new and a renovated house, air needs to be circulated continually, at least once an

hour. During the first year in a new and a renovated house, air needs to be circulated even

more efficiently in order to remove harmful gases and structural humidity. In buildings that

are more than a year old and dry, ventilation can be regulated as needed. Ventilation is

boosted during for instance a sauna bath, clothes washing and cooking, and reduced during

very cold periods or when there is nobody at home. Carbon dioxide and humidity sensors

adjust ventilation in the rooms automatically as needed.

SEASONAL CALENDAR

NOTE!

For further details, see inner pages.

Autumn

• Wash or change the coarse filter and clean

or change the fine filter if needed. The

recommendation is approximately once a

year.

• Check that the heat recovery cell is clean.

• Check that the condensing water outlet is

not clogged.

• Switch the post-heating radiator on.

Spring

• Wash or change the coarse filter and clean

or change the fine filter if needed.

• Clean the fan blades and the post-heating

unit if needed.

• Check that summer ventilation is in

operation.

• Switch the post-heating radiator off.

VALLOX DIGIT2 SE

VALLOX DIGIT2 SE, order of duct outlets

1. Supply air to rooms

2. Extract air to the unit

3. Outdoor air to the unit

4. Exhaust air outside

R MODEL

1. Supply air to rooms

2. Extract air to the unit

3. Outdoor air to the unit

4. Exhaust air outside

L MODEL

THREE QUESTIONS ABOUT VENTILATION

1234

43 1

Wireless remote control

and receiver (option)

Fixed controller (standard)

VALLOX DIGIT2 SE

SPEED

Living area (m2)

Air flow (l/s)

Total electricity consumption of fans (W)

100

140

175

125

215

160

245

200

275

235

314

110

305

Remember!

Never turn VALLOX off, or else

you'll risk catching a cough!

INSTRUCTIONS FOR USE

2. Instructions for using VALLOX DIGIT2 SE

Also get acquainted with the technical specification. It gives a broader description of the

parts and functioning of the unit.

For indoor air to stay healthy and beneficial also for the structures of the dwelling, ventilation

has to be in operation continuously. It is not advisable to stop ventilation even for longer

holidays because it makes indoor air stuffy. Also, during the heating season indoor air

humidity may condense in the ducts and structures and therefore cause humidity damage.

The sensors automatically adjust ventilation to an optimal level even if the dwelling is

empty.

2.1. Making the unit ready for operation

1. Connect the plug to the mains supply. VALLOX DIGIT2 SE is now ready for operation.

2. Turn the unit on and choose a suitable ventilation power at the control panel. There

are either one or more control panels. See the instructions for using the control panel

in Sections 3.2.1. and 3.2.2. A wireless remote control may also be in use.

In normal conditions basic ventilation, with a change of air every two hours, is sufficient in

living areas. Boosting is needed during for example sauna baths, cooking, clothes washing

or family parties. If carbon dioxide and/or humidity sensors have been installed in the

system, VALLOX DIGIT2 SE also takes care of demand controlled ventilation.

2.2. Ventilation control

The unit can be fully controlled with the control panel delivered with the unit, with a wireless

controller (option) or with a LON converter (option).

The standard week clock control can be used to control the fan power of the unit and the

setpoint for supply air temperature. (This function is not available in the wireless remote control.)

Furthermore, demand controlled ventilation can be adjusted with optional carbon dioxide

and humidity sensors.

The fan power of the unit can also be controlled with a voltage or current signal.

2.3. Ventilation control with control panel

The control panel can be used for the following ventilation control functions:

2.3.1. Functions for adjusting ventilation power

• Starting and stopping.

• Power adjustment (8 positions).

• Setting the base fan speed and the maximum fan speed. Ventilation power cannot be set

lower than the base fan speed. When carbon dioxide and/or relative humidity

adjustments are activated, power cannot be adjusted higher than the maximum fan

speed. When humidity and carbon dioxide adjustments have been switched off, fan

speed can be raised to speed 8 (if the limitation only exists with adjustments, see the

Settings menu, Section 3.3.6).

2.3.2. Supply air temperature adjustment functions

• Switching the electric post-heating unit on/off.

• Setting the desired supply air temperature (+10 °C...+30 °C).

• Selecting the desired method for controlling supply air temperature

2.3.3. Preheating

• Setting the control temperature for the electric preheating unit (-6 °C...+15 °C exhaust air).

• Changing the setpoints.

There may be three control panels at most. When more than one control panel are used, the

most recent control function is valid.

DIGIT SED

ELECTRONIC CONTROLLER

WITH LCD DISPLAY

Plug

LON converter

Carbon dioxide sensor

Control panel

Humidity sensor

If no precise measurement data is available, the table below shows the speed which is

sufficient for basic ventilation in dwellings of different sizes. The table also shows how much

the fans of the unit consume electricity at various speeds.

VALLOX DIGIT2 SE

INSTRUCTIONS FOR USE

5© VALLOX • We reserve the right to make changes without prior notice.

2.3.4. Liquid-circulating preheating and precooling

• Setting the control temperature (-6 °C... +15 °C, outdoor air) for the heating function in a

liquid-circulating preheating unit (MLV model). The function is on when outdoor air

temperature goes below the set temperature and post-heating has been switched on (see

the instructions for using the control panel, Section 3.3.24.).

When the temperature value is lower than the temperature of the liquid coming from the

ground collector, the liquid is used to heat outdoor air. If preheating cannot keep exhaust

air temperature warmer than the stopping temperature is, the outdoor air fan stops.

• Setting the control temperature (+10 °C... +30 °C, supply air) for cooling in the liquid-

circulating preheating unit (MLV model). The cooling function starts whe the post-heating

radiator has been switched off and the temperature of air coming from the unit to the

dwelling exceeds the setpoint temperature of supply air (see the instructions for using the

control panel, Section 3.2.6.).

When choosing the setpoint temperature for supply air, care must be taken so as not to

bring too cold air into the duct, which may cause humidity damage. The risk is small when

the ground collectors of the heat pump are situated in the ground or in a water system and

the liquid received from them is warmer in summer than the liquid circulating in the drilled

well.

If the duct is not insulated against condensation indoors, the temperature of air travelling

in it must be confined to below the dew point, which depends on the ambient temperature

and relative humidity. In hot weather, supply air temperature should not go below

+16…+20 °C.

2.4. Ventilation control with carbon dioxide sensor (option)

• In carbon dioxide control, VALLOX DIGIT2 SE adjusts fan speed so as to keep carbon

dioxide content in the ventilation zone below the setpoint. When two or more sensors are

used, fan speed is adjusted according to the highest measuring result.

• Carbon dioxide control is anticipatory. When carbon dioxide content is on the rise, it

raises speed up to speed 4 even if the setpoint were not exceeded.

• 1...5 carbon dioxide sensors can be connected as options to the VALLOX DIGIT2 SE unit.

• The adjustment is switched on/off and, if needed, the setpoint (500...2000 ppm) is set at

the control panel. The factory setting is 900 ppm. The recommended maximum carbon

dioxide content in good indoor air is 1,000 ppm.

• When control is on, the control panel may be used to raise fan speed to the maximum fan

speed and to decrease it to the base fan speed. In carbon dioxide control, maximum fan

speed limitation is enabled.

2.5. Ventilation control with humidity sensor (option)

There are two methods for adjusting fan speed.

1Automatic humidity setting, which is suitable for controlling humidity in washing rooms, for

instance. The program records current humidity level and selects it as the setpoint, which it

then uses as the target for drying air in a bathroom e.g. after a shower. The setpoint

automatically varies according to season, for instance, and is always at the right level.

This setting is factory selected.

2 Humidity level can also be set fixed. The setting can range between 1...99 %RH and is set

at the control panel. This can be used in public saunas and swimming pools, for instance.

The program aims at keeping humidity at the setpoint. The setpoint can be changed if

needed.

Mode of adjustment is selected at the controller (see the Settings menu, Section 3.3.19.).

Recommended humidity content of good indoor air is approximately 45%.

• When this control is on, the control panel may be used to raise fan speed to the maximum

fan speed and to decrease it to the base fan speed.

• In humidity control, fan speed varies between the basic and maximum fan speeds

selected.

• When the unit is first taken into use with automatic setpoint search enabled (factory setting), it

takes 3 to 10 hours for the program to define the value. During this time, humidity adjustment is not

enabled (because the first value, selected at the factory, is 100%).

• Automatic search is enabled even if humidity control is not selected.

Carbon dioxide sensor (CO

)

Humidity sensor (RH)

2.4. 2.5.

2.6. Ventilation control with voltage or current signal

• VALLOX DIGIT2 SE fan power can be controlled with a voltage or current signal coming from

remote monitoring.

• The signal can be used to select speeds 0 to 8. However, if carbon dioxide or humidity

adjustment is enabled, the maximum fan speed cannot be exceeded.

• The signal changes the base fan speed.

• The signal does not lock fan speed, i.e. fan speed can be changed at the control panel within

the set limits. Carbon dioxide and humidity adjustment also operate within the set limits.

2.7. Ventilation control with remote monitoring system (option)

• With an optional LON converter, VALLOX DIGIT2 SE can be connected to the remote

monitoring system.

• When VALLOX DIGIT2 SE is connected to the remote monitoring system, compatibility

between the two needs to be ensured.

• The remote monitoring system can control the same functions as the control panel does.

• The remote monitoring system works in parallel with the control panel as well as carbon

dioxide and humidity sensors.

2.8. Post-heating

For most of the year, heat recovered from the air being extracted is enough to warm the cold air

coming from the outside to a suitable temperature. If the heat of extract air is not enough, air

coming from the outside may be heated further with an electric radiator, available as an option

for the unit. Post-heating is switched on at the control panel (see the instructions for using the

control panel, Section 3.1.). When heating has been switched on, the unit automatically adjusts

the selected supply air temperature.

2.9. Supply air constant temperature control

• Post-heating control in VALLOX DIGIT2 SE is relative; when the temperature selected exceeds

supply air temperature by more than 2.5 °C, the radiator is on 100%, and when the

temperature difference gets smaller, the period of active heating is automatically reduced in

two-minute sequences. The adjustment range of heating is 10...30 °C.

• The heating radiator is on when the ( ) sign is displayed.

• Temperature control is only active when post-heating has been switched on.

2.10. Supply air cascade control

• Supply air temperature control can be changed into cascade control.

• It changes the controlling principle of the post-heating radiator. The temperature of air blown

to the ventilation zone is controlled on the basis of extract air.

• The program tries to keep supply air temperature at a value determined by the difference

between extract air and the setpoint as follows: If extract air is warmer than the setpoint,

supply air temperature is lower than the setpoint by the difference. If extract air is colder,

supply air is higher than the setpoint by the difference.

If the temperature in the room is 25 °C and the setpoint is 24 °C, the aim is to blow 23 °C air

to the ventilation zone. If the temperature in the ventilation zone is 24 °C and the setpoint is

25 °C, the aim is to blow 26 °C air to the ventilation zone.

• The aim is to keep the temperature of air blown to the ventilation zone always within the

range of 10...30°C.

• Cascade control can be selected at the control panel, and it is active when post-heating has

been switched on.

• The heating radiator is on when the ( ) sign is displayed.

2.11. Heat recovery bypass function

• The bypass function tries to get as cool supply air as possible to the ventilation zone by

comparing the measuring results of the outdoor air and extract air sensors.

• The heat recovery cell is bypassed when post-heating is switched off, outdoor air temperature

is two degrees more than the setpoint and extract air is warmer than outdoor air.

• The setpoint can be changed between 0 and +25 °C. (Factory setting 12 °C).

VALLOX DIGIT2 SE

INSTRUCTIONS FOR USE

2.8.

LON converter

VALLOX DIGIT2 SE

INSTRUCTIONS FOR USE

Remember!

Switch post-heating off when it starts

to get too warm in the dwelling becau-

se of warm weathers.

Switch post-heating on again when it

gets cooler in autumn.

2.12. Heat recovery antifrost function and preheating

• Antifrost prevents the heat recovery cell from freezing, thus ensuring proper ventilation even in

cold periods.

• According to the factory setting antifrost is implemented in units with an electric preheating

radiator by stopping the supply air fan. The stopping function is controlled on the basis of the

data given by the temperature sensor measuring the temperature sensor of exhaust air after

the heat recovery cell.

• T he supply air fan stops when exhaust air temperature falls to the setpoint (factory setting

+4 °C) and starts when exhaust air temperature has risen to the value set (by the amount of the

hysteresis setting, factory setting +3 °C).

Preheating

• The unit is equipped either with an electric preheating radiator or a liquid-circulating

preheating radiator (MLV model). The purpose of using the radiator is to minimise momentary

stopping of the supply air fan. This ensures a maximally even supply air flow through the unit.

• An electric preheating radiator is taken into use by using the Settings menu, adjusting switch-

on temperature to be higher than the value for “supply fan Stop”. The difference could be

2 °C, for example.The radiator switches on when exhaust air temperature falls to the setpoint

and switches off when exhaust air temperature has risen to the value set (by the amount of the

hysteresis setting, factory setting +3 °C).

If radiator power is not sufficient in extreme conditions, the supply fan starts to stop as exhaust

air temperature goes down to the “supply fan Stop” value. The setpoint for preheating could

be +6 °C, for instance; the factory setting for “fan Stop” is +4 °C.

• The liquid-circulating preheating radiator (MLV model) starts when post-heating has been

switched on and outdoor air temperature is below the preheating setpoint. The setpoint

temperature must be lower than the temperature of the liquid in the ground collector (factory

setting +0 °C). The automatic control system of the unit switches on the circulation pump and

opens the solenoid valve of the radiator (see the Technical specification).

2.13. Maintenance reminder

• The maintenance reminder switches on the maintenance reminder symbol ( ) in the main

display of the control panel at defined intervals, the factory setting being 4 months.

• The maintenance reminder symbol is reset at the control panel (see the instructions for using

the control panel, Section 3.3.10.).

• The interval can be set between 1 and 15 months at the control panel.

2.14. Filter guard function

• If DIGIT2 SE is equipped with a pressure difference switch for the supply and/or extract air

ductwork, the switch monitors the pressure difference in the whole ductwork. When pressure

has risen (e.g. because of a clogged filter), the filter guard symbol ( ) in the main display of

the control panel is lit up.

• The filter guard closes the contacts of the fault signal relay, and the filter guard symbol ( ) is

seen in the main display.

• The maintenance reminder is on even during this function.

• The operation threshold for the pressure difference switch is adjusted at the pressure

difference switch regulator (0...500 Pa). Factory setting is ca. 260 Pa, and the setting can be

changed if needed. With clean filters, the symbol should light up at speeds 7 and 8.

2.15. Antifreeze function in water-circulating post-heating unit

• The antifreeze function aims at preventing a water-circulating post-heating unit from freezing.

The automatic function stops the supply and extract air fans as soon as outdoor air

temperature falls below 0 °C and supply air temperature below +7 °C. At the same time, the

self-actuated dampers of the fans close and the control valve becomes wide open. The control

panel displays the fault message FREEZING ALERT, irrespective of display.

• The fans start automatically and the dampers open as soon as supply air temperature exceeds

10 °C.

Pressure difference switch

VALLOX DIGIT2 SE

INSTRUCTIONS FOR USE

8© VALLOX • We reserve the right to make changes without prior notice.

2.16. Fireplace switch function/boosting

Fireplace switch function

• The fireplace switch stops the extract air fan for 15 minutes and produces overpressure in the

ventilation zone. This makes it easier to light a fireplace, for instance.

• The function is started in the main display of the control panel by simultaneously pressing and

holding down the + and - buttons for 2 seconds.

• The function can also be started at a separate auto-reset push-button switch, wired from the

connection box of the unit to a wall in the fireplace room, for instance. Upon each pressing, the

stopping function continues for 15 minutes (the switch is not included in the delivery).

• During the function, the fireplace/booster switch symbol ( ) is visible in the main display of the

control panel.

NOTE!

The starting of the extract air fan may weaken draught in the fireplace.

During cold winter periods, the flowing of cold air to the extract ducts may cause the antifreeze and antifrost functions

to start. The situation will normalise in a while, after the functions stops.

Booster switch function

• The booster switch raises the fan speed to the set maximum speed for 45 minutes.

• The function is started in the main display of the control panel by simultaneously pressing and

holding down the + and - buttons for 2 seconds.

• The function can also be started at a separate auto-reset push-button switch, wired from the

connection box of the unit to a wall in a classroom, for instance. Upon each pressing, the booster

function continues for 45 minutes.

• During the function, the fireplace/booster switch symbol ( ) is visible in the main display of the

control panel.

• The function is chosen at the control panel (is alternative to the fireplace switch function, see

Section 3.3.17.).

2.17. Fault signal relay (remote monitoring)

• The fault signal relay has potential-free contacts (24 VDC, 1 A).

• The contacts provide information on various failure modes of the unit.

• When the antifreeze function of the water-circulating radiator is on, the

contacts of the relay close and open at a 10-second interval.

• Alarm of high carbon dioxide content switches the relay at 1-second in-

tervals.

• In other fault situations, the contacts are closed.

2.18. Air filtering

VALLOX DIGIT2 SE has an F7 class fine filter (B) and a G3 class coarse filter

(A) on the supply air side as well as a G3 class coarse filter (C) on the extract

air side. The filters need to be in place in the unit whenever ventilation is in

operation.

Heat recovery

cell

Fan speed (3).

Supply air temperature (21 °C).

Post-heating is on.

Time.

Filter guard alert.

Maintenance reminder alert.

Fireplace/booster switch on. The fireplace/booster

switch is activated in this display by simultaneously

pressing down the + and – buttons for 2 seconds.

Week clock control on.

21 C

10:20

VALLOX DIGIT2 SE

INSTRUCTIONS FOR USING THE CONTROL PANEL

3. Control panel

Separate instructions for use and installation instructions are delivered with a wireless remote control.

1 2 3 4

5 6 7 8

3.2. Operating menu

3.2.1. Main display and change of fan speed

Fan speed can be changed in this display with the + and – buttons

(see Section 3.1., items 7 and 8 in the figure).

The displays of the operating menu (sections 3.2.1.–3.2.6.) can be scrolled with the scrolling buttons

(see section 3.1., items 5 and 6 in the figure).

5Scrolling up

With this button you can scroll the displays upward.

6Scrolling down

With this button you can scroll the displays downward.

7Increase button

With this button you can increase values.

8Decrease button

With this button you can decrease values.

2Carbon dioxide adjustment

Press this button to switch carbon dioxide

adjustment on and off. When the indicator is

lit, the adjustment is on.

3Humidity adjustment

Press this button to switch humidity adjustment

on and off. When the indicator is lit, the

adjustment is on.

4Post-heating

Press this button to switch post-heating on and

off. When the indicator is lit, post-heating is on.

The summer function is active when the indicator

is not lit.

3.1. Keyboard

Power failure

After a power failure, the unit starts at minimum

fan speed. The adjustments and setpoints chosen

will remain in the memory of the unit in spite of

the power failure.

1Start button

Use this button for switching the unit on and off.

When the indicator is lit, the unit is on.

21 C

10:20

In order to move the control panel to the settings menu, press the + and – buttons simultaneously.

In the Settings menu you can change setpoints for the ventilation unit.

The content display shows humidity and carbon dioxide content. The corresponding

sensors are required (options).

The temperature display shows the temperatures of outdoor air, indoor air, supply air

and exhaust air. The accuracy of the temperature sensors is ±2 °C.

Supply air temperature setting is changed with the + and – buttons. In the MLV model the cooling

function of the MLV radiator starts when supply air temperature exceeds the supply air setpoint

temperature. NOTE! When choosing temperature make sure that there is not too cold air in the supply

air duct (risk of condensation grows as temperature goes below 20 °C).

3.2.2. Moving to the settings menu

3.2.4. Content display

3.2.5. Temperature display

3.2.6. Setting supply air temperature

To settings menu

See manual

RH1 35% RH2 40%

CO2 0821 PPM

Out 20 In 20

Sup. 20 Exh. 20

Temp. setting

20C

Week clock control can be activated by pressing the + button and deactivated by pressing the –

button. Week clock control is on when the symbol of week clock control is shown in the main

display. In week clock control, the base fan speed and supply air temperature of the unit are

adjusted in accordance with the programme as described in Section 3.3.4.

3.2.3. Week clock control

Week program

VALLOX DIGIT2 SE

INSTRUCTIONS FOR USING THE CONTROL PANEL

3.3. Settings menu

You can reach the Settings menu from the Operating menu as indicated in section 3.2.2. The displays of the Settings menu

(Sections 3.3.1.–3.3.26.) can be scrolled with the scrolling buttons. (See Section 3.1., items 5 and 6 in the figure.)

3.3.1. Setting base fan speed

The desired base fan speed (minimum fan speed) is selected with the + and – buttons.

Active when week clock control is not on. Week clock control changes this speed.

MIN speed

3.3.2. Moving to the operating menu

You can return to the operating menu by pressing the + and – buttons simultaneously.

To main menu

Press + and -

The maximum fan speed setting can be selected to be active either in connection with (carbon dioxide

and humidity) adjustments or permanently. The selection is done with the + and – buttons.

3.3.6. Mode of operation of the maximum speed setting

MAX Speed limit

with adjustments

Select the desired language (German, English, Swedish, French or Finnish) with the + and – buttons.

3.3.7. Choosing language version

Kieli / Language

English

The general factory settings can be restored by pressing the + and – buttons simultaneously.

Remember to ensure that the setpoints are in accordance with the factory settings for this unit.

Especially, check the unit model (electricity/water) and change if needed as stated in Section 3.3.20.

3.3.8. Restoring factory settings

Factory settings

see manual

The adjustment interval for humidity and carbon dioxide adjustments is selected with the + and –

buttons. The adjustment interval refers to minutes.

3.3.9. Adjustment interval

Adjust interval

The maintenance reminder is reset by pressing the + and – buttons simultaneously. This

turns off the maintenance reminder symbol ( ) on the main display.

3.3.10. Resetting the service reminder

Mainten. reset

Press + and -

The contrast setting for the control panel display is changed with the + and – buttons.

3.3.11. Contrast of the control panel display

Display contrast

The week programme can be totally erased by simultaneously pressing the + and – buttons.

3.3.3. Erasing the week programme

Erase week prog.

Press + and -

You can access the programming mode for the week clock programme by simultaneously pressing

the + and – buttons. See Section 3.4.1.

3.3.4. Week programme programming

Adjust week prog.

Press + and -

You can adjust time by simultaneously pressing the + and – buttons. For more details, see Section

3.4.2.

3.3.5. Adjusting time

Adjust time

Press + and -

The address of the control panel is changed with the + and – buttons. Two control panels cannot

have the same address. If control panels have the same address, they go to bus fault state and do not

work.

3.3.12. Address of the control panel

Panel address

The desired adjustment value for the direct current fan is selected with the + and – buttons. The

rotation speed of the extract air fan can be decreased by decreasing the percentage. If the unit has

alternating current fans, this adjustment has no impact on the functioning of the unit.

3.3.13. Controlling the direct-current fan on extract air side (does not apply to VALLOX DIGIT2 SE as it has an AC fan)

DC fan exhaust

100%

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