VentoVind PRO Special user manual
© Corroventa Avfuktning AB
2020.12
30 (39)
Checks at start-up
To ensure the system's operation and function it is very important that the following points are
checked.
Test operation of fan
The fan can be controlled manually via the control panel. Upon delivery VentoVind is set with a start-
delay of 1 minute so that motorised dampers have time to open.
•
Check that the motorised dampers open before the fan starts.
•
Test operate the fan gradually at speeds between 30
–
100%.
•
During test operation, check that air goes out from the attic space via the exhaust air damper, note at
which lowest fan speed this occurs.
•
Check that no strange noises are heard from the fan or that whistling sounds occur at in and outlet
vents at maximum speed.
•
Check that the guard on the fan is installed. If the fan is installed in a public area lock the guard on the
fan using a screw or pop rivet.
Motorised dampers.
The dampers can be test operated manually via the control panel. Check that the damper function
works satisfactorily and that the dampers open and close without any problems. Upon delivery
VentoVind is set so that motorised dampers open 1 minute before fan start. The time between
damper opening and fan start can be adjusted via the control panel. When dampers are of the spring
return type, these close when the ventilation is switched off. NOTE! An installation always has two or
more motorised dampers installed.
Mechanical dampers.
The mechanical damper's flaps open when an overpressure of approx. 3-5pa is achieved in the attic
space. At what fan speed an overpressure of 3-5Pa can be achieved and the damper opens, depends
entirely on how well sealed the installation is. The mechanical damper should open at the latest
when the fan is operating at 80 - 100%. If the damper does not open, the leak in the attic space is too
large and additional sealing is required for proper function. Check that the damper flaps open
without any problems when touched lightly and spring back to the closed position.
