4.2. Fans and post-heating radiator
The supply and extract air fans (D and E) have been fastened with rubber
collars (F). When removing the fans for maintenance, remove the one-way
dampers (L) from the VKL model, open the ear (K) attached to the fan, bent
over the rubber collar. Then lift the rubber collar away and turn the fan away
from above the lower support (M) made of rubber. Then take the electrical
connector (G) off from behind the fan.
Clean the fan blades with compressed air.
If you use water when cleaning the unit or its parts, do not let water enter the electric parts.
For cleaning the post-heating radiator (J), remove the filters and the heat
recovery cell. Clean the post-heating radiator while it is in place in the unit
either by vacuuming it or blowing it with compressed air. The radiator can be
either electric or water circulated. If needed, you can remove the electric
radiator for maintenance by removing the electrical connector (H) as well as
the two tightening-up screws (I) and the adhesive or screw fixing the support
against the bottom reservoir.
4.2.1.
Detaching and attaching of one-way damper.
Detaching and attaching of self-actuated one-way damper (vacuum damper):
A Put the hook on the rim of the damper (Y) under the side edge of the
fastening collar (K) of the fan (F). Then push the damper downwards so
that the guide edges of the valve go inside the rubber collar.
B Push the other side of the collar with a finger.
C Put the hook on the other side edge of the damper below the edge of the
collar.
To detach the damper take the same steps in the opposite order.
Self-actuated one-way dampers are only used in VKL model units. Observe
the position of the damper so that it can also operate on the F7 filter side.
4.3. Filter guard
DIGIT SE can be equipped with an optional filter guard. The filter guard symbol ( ) normally
lights up in the main display at speeds 7 and 8, when the filters are clean, and this does
not cause any service activities. If the symbol does not light up at speed 8, the pressure in
the ventilation ductwork of the building differs from the factory setting. In that case, adjust
the filter guard setpoint lower in the inside of the unit (see Section 2.14). If the filter guard
symbol lights up at fan speed 4 or 5, the filters need cleaning. If they are clean, the lighting
up may be caused by too dense a mosquito net installed in the external grille or by the
closing of the supply air valves in the rooms. If, after checking these things, the symbol
continues to light up at small speeds, adjust the setpoint greater.
4.4. Condensing
water
During the heating season, the humidity in extract air condenses as condensing water. Water
formation may be abundant in new buildings or if ventilation is scarce in terms of moisture
production by the inhabitants. The condensing water must exit the unit without hindrance.
In connection with maintenance operations, for example in the autumn before the start of
the heating season, make sure that the condensing water joint (L) in the bottom reservoir is
not clogged. You can check this by pouring a little water in the reservoir. Clean if needed.
Do not let any water enter the electrical devices.
VALLOX DIGIT SE/SE VKL
14
MAINTENANCE INSTRUCTIONS
© VALLOX • We reserve the right to make changes without prior notification.
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