IMO MRH
Commissioning
MRH 18.08.2022 11
8.2 Commissioning
WARNING
Hazard from electrical voltage!
Commissioning by trained and instructed qualified personnel only!
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
Hazard from touching impeller, if not covered with protective grid!
The outlet protective grid is serially provided.
WARNING
Hazard from bursting parts!
When checking the direction of rotation, wear safety goggles.
WARNING
Hazard from electrical voltage and flying parts!
Errors occurring can lead to personal and/or property damage!
Observe 5 safety rules for the electrical expert!
- disconnect from the power supply (all-pole),
- prevent switching on again,
- test absence of voltage,
- earthing and short-circuiting,
protect adjacent live parts by covers and barriers and fit a suitable warning notice.
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).