Vents Boost 355 User Manual page 8

Fasten the fan to the surface using the screws with the dowels of appropriate size (not included in the delivery set).
Make sure the fan is fastened securely.
Connect the air ducts of the appropriate diameter to the fan (connections must be airtight).
Air motion in the system must be in compliance with the direction of the arrow on the fan label.
To attain the best performance of the fan and to minimise turbulence-induced air pressure losses, it is recommended to connect the
straight air duct section to the spigots on both sides of the unit while mounting.
Minimum recommended straight air duct section length is equal to 3 fan diameters (see the "Technical data" section).
If the air ducts are shorter than 1 m or not connected, the internal parts of the unit must be protected from ingress of foreign objects.
To prevent uncontrollable access to the fans, the spigots may be covered with a protecting grille or other protecting device with
mesh width not more than 12.5 mm.
ELECTRONICS OPERATION ALGORITHM
The EC motor is controlled by sending of an external control signal from 0 to 10 V to the X2 terminal block or by the R1 internal speed
controller. Control method selection is carried out by means of the SW DIP switch:
- DIP switch in IN position. The control signal is set by the R1 internal speed controller, which allows turning the fan on and off, smoothly
regulating the fan motor rotation speed (air flow) in the range from minimum to maximum speed.
Rotations are controlled from the minimum (extreme left position) to the maximum (extreme right position).
When rotating clockwise, the rotations increase.
- DIP switch in EXT position. The control signal is set by the S1 external control unit.
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SURFACE MOUNTING
3xD 3xD
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