VALLOX 280 SE
14
MAINTENANCE INSTRUCTIONS
© VALLOX • We reserve the right to make changes without prior notification.
Pressure difference switch
Connection box cover
Fixing screw (4 pcs)
Quick couplings
Supply air fan
Extract air fan
Fixing screw (4 pcs)
Quick couplings
3.3. Fans
• It is a good idea to check the cleanliness of the fans in
connection with the maintenance of the filters and heat
recovery cells. Clean them when needed.
• You can take the fans off by opening the fixing screws
(4 screws) and the quick couplings of the conductors. You can
clean the fan blade by blowing it carefully with compressed air,
brushing with a brush or by using a damp cloth to wipe each
blade so clean that the fans stay in balance. Also clean the fan
hoods.
•
Rinsing water into the fan motor is absolutely forbidden!
3.4. Condensing water connections
• During maintenance, also check the unit’s reservoir and the
condensing water connections.
• To see the condensing water connections, remove the socle. If a
condensing water tank is in use, it can be drawn out by pulling
it forward. The tank can be removed for emptying and
cleaning.
• When the condensing water outlet is in use, check its condition
and make sure it is not clogged.
4. Pressure difference switch
4.1. Pressure difference switch setting
You can modify the operating threshold of a pressure difference
switch as follows:
Remove VALLOX 280 from the electric circuit by switching off input
voltage at the distribution panel, for instance.
1. Take off the upper door of the unit.
2. Take off the cover of the connection box located inside the unit.
3. Take off the cover of the pressure difference switch and turn the
adjustment wheel to the desired setpoint (see the figure and the
adjoining table).
Taking off the cover of the pressure
difference switch
Ventilation power position
Supply air filter F7
Pressure difference switch
(PDS1)
Extract air filter G3
Pressure difference switch
(PDS2)
Extract air filter G3+F5
Pressure difference switch
(PDS2)
1
100
100
125
2
125
125
150
3
150
150
175
4
175
175
225
5
200
200
250
6
225
225
300
7
250
250
325
8
275
275
350
