IMO MRH

Commissioning
MRH 18.08.2022 11
8.2 Commissioning
WARNING
Check: service switch of the fan is in off position and the actuator`s service switch is in 0 (middle) position.
Check also the instructions of the fan since different fans can be built in, different requirements could ap-
ply.
Check if the power supply is provided.
Switch the actuator`s service switch to position 1 (open the cover). It takes up to 30 s to fully open (check).
Switch the fans’ service switch on for 2-3 s and immediately off. Check direction of rotation if complies with the
arrow on the casing. If not, two phases need to be swapped either in the service switch or in electrical cabi-
net.
DANGER
WARNING
WARNING
After swapping check:
- the direction of rotation. Switch the fan for a short period on and then off to check the direction of rotation
of impeller, if complies with the arrow on the casing.
- leave the fan running, check, if running smoothly (eventual vibrations and noise);
- measure current with appropriate instrument (it may exceed nominal current by a max. 5%);
- tightness of all joints.
Fill in the attached test protocol of the fan and submit it in case of warranty claim.
Switch the actuator`s service switch to position 2 (close the cover). It takes up to 30 s (check).