Vallox 280 L Technical Specifications Download Page 14

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VALLOX 280

INSTALLATION

Location

• The unit is mounted indoors, in a place where temperature does not fall below

+10 ºC.

• The unit is to be mounted in a place where the sound pressure level coming through

the envelope is not acoustically disturbing (storerooms, corridors, technical rooms,
and in some cases rooms where people spend time, such as classrooms).

• The unit is equipped with an adjustable base. If the unit is mounted on the wall,

attention needs to be paid to the weight of the unit (206 kg) and to vibration
isolation.

• The unit is splash protected (IP 34) and can thus also be mounted in a damp room.

Electrical connections

• The unit is permanently connected to the mains supply. The electrical connection box

of the unit is located inside the unit, in connection with the exhaust air duct.

• Cables connected to the unit are led through the lead-in seals next to the extract air

duct outlet.

• The cables are connected to the unit by taking off the upper door and the cover of

the electrical connection box located in the exhaust air duct. Follow the connection
instructions. The external and internal connection diagrams are shown in these
instructions and inside the cover of the electrical connection box.

Duct connections

• The unit is equipped with four ø 250 external connection outlets. Necessary

connecting pieces (e.g. inner or bent connectors) can be attached to external
connection outlets.

NOTE! LENGTH OF THE CONNECTING HEAD OF THE CONNECTING PIECE NO MORE THAN 50 MM.

Fix the ducts steadily and tightly to the relevant outlets. (NOTE! Unit models L/R).
Implement duct insulation if needed as defined in the ventilation plan.

Air flow measurement outlets

• The fixed air flow measurement outlets are located behind the VALLOX nameplate

(12) at the upper edge the unit. You can easily remove the nameplate by sliding it
upward and pulling it toward yourself.

• Via the measurement outlets, the total pressure of the supply and extract air ductwork

can be measured with a differential pressure instrument. Pressure readings and air
volume tables (p. 3 or 4) show volume flow rates at various adjustment positions.

• The red measurement hose is on the pressure side and the black hose on the suction

side of the fan.

Condensing water connections

• Water condensing from extract air going through the unit can be removed from the

bottom tank in two ways.

• When the humidity content of extract air is high, as for example in washrooms, the

condensing water is led from the screw-type coupling in the bottom tank to the floor
drain via the condensing water outlet (water seal) delivered with the unit.

• When the humidity content of extract air is low, as in office rooms, the condensing

water can be led from the screw-type coupling in the bottom tank to the condensing
water tank delivered with the unit. It is pushed below the bottom tank to the guide
posts in the base. In this case, no separate condensing water outlet is used. NOTE!
When a condensing water tank is used, it has to be inspected sufficiently often.

• The screw-type coupling is located almost in the middle of the unit. This is why the

unit has to be mounted level with the horizontal.

Pipe connections

• If the unit is equipped with a water-circulating post-heating unit, it is connected to the

warm water circuit with 15/13 copper tubes.

NOTE! WATER-CIRCULATING HEATING RADIATOR INCLUDES A CONTROL VALVE.

Pressure difference switches

If the unit is equipped with pressure difference switches controlling the pressure difference
in the supply and/or extract air filters, they have to be set at correct values according
to the adjustment position chosen. For further instructions, see the instructions for use and
maintenance of VALLOX 280.

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483

DOOR

CONDENSING WATER
OUTLET, MODEL L

CONDENSING WATER
OUTLET, MODEL R

VALLOX 280 L

OUTDOOR AIR
SUPPLY AIR
EXTRACT AIR
EXHAUST AIR

VALLOX 280 R

EXHAUST AIR
EXTRACT AIR
SUPPLY AIR
OUTDOOR AIR

A
B

C
D