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The fan supplies less air than
expected.
Excessive noise or vibration both
inside the fan and in the circuit.
STORAGE AND TRANSPORTATION REGULATIONS
•
Store the unit in the manufacturer's original packaging box in a dry closed ventilated premise with temperature range
from +5 ˚C to +40 ˚C and relative humidity up to 70 %.
•
Storage environment must not contain aggressive vapors and chemical mixtures provoking corrosion, insulation, and sealing
deformation.
•
Use suitable hoist machinery for handling and storage operations to prevent possible damage to the unit.
•
Follow the handling requirements applicable for the particular type of cargo.
•
The unit can be carried in the original packaging by any mode of transport provided proper protection against precipitation and
mechanical damage. The unit must be transported only in the working position.
•
Avoid sharp blows, scratches, or rough handling during loading and unloading.
•
Prior to the initial power-up after transportation at low temperatures, allow the unit to warm up at operating temperature for at least
3-4 hours.
18
Wrong calculation of the ventilation network and
wrong selection of the fan.
The network resistance exceeds the design
calculations.
Wrong direction of the impeller rotation.
Air leak through a loose air duct connection.
Impeller or air duct contamination with foreign
objects or debris.
Loose screw connections.
No flexible joints between the fan and the ventilation
network on the suction and discharge sides.
Loose connection of valves and dampers to the air
ducts.
Impeller or air duct contamination with foreign
objects or debris.
Worn bearings.
Unstable power supply, unstable motor operation.
Re-calculate the network parameters and select a
matching fan.
Re-arrange the ventilation network to decrease its
aerodynamic resistance.
If necessary, change the impeller rotation direction by
changing the phase sequence on the electric motor
(see the "Commissioning"
terminals
Eliminate the air leak. Seal the air duct connection.
Clean the impeller or the air ducts from foreign objects or
debris.
Check the screw connections for proper tightness.
Install flexible joints.
Tighten up the fasteners of valves and dampers.
Clean the impeller or the air ducts from foreign objects or
debris.
Replace the bearings.
Check the stability of power supply parameters and
electric motor operation.
www.ventilation-system.com
VKV/VKH
section).
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