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PRESSURE DIFFERENCE
SWITCH (OPTIONAL)

WATER CIRCULATED POST-HEATING
UNIT (OPTIONAL)

ELECTRIC POST-HEATING UNIT
 (OPTIONAL))

PREHEATER (OPTIONAL)

SILENCER (OPTIONAL)

VALLOX Product Code:

VALLOX 252 D

3158400 L
3158410 R

Supply air

Disccharge air

DIGIT
CONTROL PANEL

CO

2

 SENSOR

(OPTIONAL)

%RH SENSOR (OPTIONAL)

LON CONVERTER
(OPTIONAL)

Supply air
Extract air

210 dm

3

/s   100 Pa

230 dm

3

/s   100 Pa

2 heat recovery cells, 

η

>70 %

Summer/winter automation
2.5kW 11 A
2.5kW 11 A
ca. 5kW
EU3
EU7
EU3
EU5

2x230 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)
– CO

2

 and %RH control

– Remote monitoring control (LON)
– Remote monitoring control
   (voltage / current signal)

Ventilation adjustment options

– Silencer
– Preheater unit
– Electric post-heating unit
– Water circulated post-heating unit
– CO

2

 sensor

–  %RH sensor
– Pressure difference switch
– LON converter

Options

Power supply

230 V, 50 Hz (400 V) 13.9 A
(+ preheater 10.9 A)

Basic unit

210 kg

Weight

Protection class

IP 34

Supply air

Disccharge air

INSTRUCTIONS FOR USE AND MAINTENANCEINSTRUCTIONS FOR USE AND MAINTENANCE

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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