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7

VALLOX 252 D

INSTRUCTIONS FOR USING THE CONTROL PANEL

The basic fan speed (minimum fan speed) is selected with the + and - buttons.

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

The maximum fan speed setting can be selected to be active either with adjustments
(carbon dioxide and humidity) or permanently. The selection is done with the + and -
buttons.

The language (German, English or Finnish) is selected with the + and -
buttons.

The general factory settings can be restored by pressing the + and - buttons simultaneously.
It has to be checked for each unit that the setpoints are as stated in Section 1.4. Especially,
check the unit model (electricity/water) and change if needed as stated in Section 1.3.17.

The adjustment interval for humidity and carbon dioxide adjustments is
selected with the + and - buttons. The adjustment interval refers to minutes.

The maintenance reminder is acknowledged by pressing the + and - buttons
simultaneously.

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

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
will go to the bus fault state and will not operate.

The desired adjustment value for the DC fan is selected with the + and - buttons. The
rotation speed of the extract air fan can be lowered by decreasing the percentage value.

1.3.1.

Setting the basic fan speed

1.3.2.

Moving to the operating menu

1.3.3.

Mode of operation of the maximum speed setting

1.3.4.

Choosing the language version

1.3.5.

Restoring the factory settings

1.3.6.

Adjustment interval

1.3.7.

Acknowledging the maintenance reminder

1.3.8.

Contrast of the control panel display

1.3.9.

Address of the control panel

1.3.10. Adjusting the DC fan on the extract/exhaust air side

MIN fan speed
1

To main menu
Press + and -

MAX Speed limit
With adjustments

Kieli / Language
English

Factory settings
see manual

Adjust interval
10

Mainten. reset
Press + and -

Display contrast
05

Panel address
1

DC fan exhaust
100%

You can reach the settings menu from the operating menu as indicated in Section 1.2.2.
The displays of the settings menu (Sections 1.3.1.–1.3.23.) can be scrolled with the scrolling buttons.
(See Section 1.1., legend numbers 5 and 6 in the figure).

1.3. Settings 

menu

Summary of Contents for 252 D Series

Page 1: ...0 W 1 A 2x230 W 1 A Fans Heat recovery Heat recovery bypass Preheater Electric post heating unit Water circulated post heating unit Filters Filters Manual control DIGIT control panel CO2 and RH contro...

Page 2: ...goes under the preset threshold value To avoid or to decrease the stopping of the supply air fans you can heat outdoor air with an electric preheater If the unit is equipped with a preheater defrostin...

Page 3: ...djusts fan speed so as to keep the carbon dioxide content in the ventilation zone below the setpoint If two or more sensors are used fan speed is adjusted in accordance with the highest measuring resu...

Page 4: ...0 25 C The factory setting is 10 C Heat recovery cell defrosting function The defrosting function prevents the heat recovery cell from freezing thereby ensuring that ventilation works in cold periods...

Page 5: ...setpoint and the actual temperature For instance if indoor air temperature 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 zo...

Page 6: ...tings 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 s...

Page 7: ...he control panel is changed with the and buttons Two control panels cannot have the same address If control panels have the same address they will go to the bus fault state and will not operate The de...

Page 8: ...may cause a faulty post heating function 1 3 17 Choosing post heating for the unit Radiator type electric rad Automatic or manual search of the basic humidity level The selection is done with the and...

Page 9: ...1 3 22 Changing the setpoint for carbon dioxide adjustment CO2 setting 0900 PPM Basic fan speed 1 Maximum fan speed 8 Carbon dioxide adjustment CO2 900 ppm CO2 Basic humidity level value chosen eithe...

Page 10: ...he doors of the ventilation unit have to be mounted 5 If the filter guard symbol appears in the main display of the control panel proceed to step 7 If it does not appear proceed to step 6 6 You can in...

Page 11: ...is not functioning The extract air filter or the cell is clogged The initial adjustments for ventilation have not been made 1 Check the insulation of the attic ducts If the heat recovery cell has fro...

Page 12: ...e but they can be cleaned with pressure air carefully blowing against the direction of contamination When needed replace the filters with new ones The recommended interval for filter change is one yea...

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