499247 AJR OIPM

499247

AJR Jet Fan | 13

9 Commissioning

9.1 Safety information

• Commissioning may only be carried out by adequately qualified persons, see Table 1: Qualifications

• Wear protective equipment during all work in the vicinity of the fan, see 2.2 Personal protective equipment

9.2 Preconditions

• Installation and electrical connections have been correctly performed.

• Residual material from installation and foreign objects have been removed from the fan housing

• Inlet and outlet are free of obstruction

• Safety devices have been fitted.

• Ground cable is connected.

• Cable glands are tight.

• Nominal current (from the nameplate) is not exceeded.

• Data on the nameplate corresponds with the connection data.

9.3 Tests

1. Before switching the fan on, check for externally visible damage and ensure that the protective equipment functions properly.

2. Switch the fan on.

3. Checks:

a. Direction of rotation & conveyance. The direction of rotation always applies while looking at the impeller

i. The direction of rotation is best observed just before the fan stops.

ii. The direction of conveyance is best observed when a piece of clothing is held in front of the fan on a pole or similar.

b. Vibration levels

c. Current consumption

i. Compare the current consumption with the nominal consumption on the nameplate.

d. Tightness of all connections

e. Ensure correct speed control operations, if applicable

4. Switch the fan off.

9.4 Commissioning of speed-controlled fans

• Check the fan for vibrations at all normal operation speeds during commissioning. Determine and evaluate vibrations on the housing

and bearing areas in accordance with DIN ISO 14694 depending on motor power and positioning.

Measurable vibration velocities depend e.g. on following factors:

• Positioning

• Bottom section/foundation state

• Flow conditions

• The working point of the fan, as well as used external devices and accessories, also influence the running characteristics.

9.5 Adjusting the blade angle

Adjusting the blade angle on the AJR product series is not recommended by Systemair and will void the manufacturer’s warranty.