Vents VPQ 710, Руководство пользователя, Страница: 9 / 20

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Before installing the unit, carry out the following checks:
• Make sure that the fan impeller rotates freely.
• Make sure there is no condensate on the motor.
• Check the electrical resistance of insulation between the motor windings and between each winding and the motor casing.
The unit can be mounted in any position – vertically, horizontally or tilted at any angle.
FAN INSTALLATION RECOMMENDATIONS
Fan installation into an air duct system
To ensure a uniform air flow, the fan should be preceded by a straight duct
section with a cross-section area equal to half of that of the fan. The length
of the duct section should be 3 ÷ 4 D (where D is the inner diameter of the
fan). The length of the straight duct section downstream of the fan should
be 1.5 ÷ 2 D. Reduction of the recommended duct length values results in
a drop of the fan pressure and performance. To reduce noise and vibration
use the VVGF-VO flexible joints.
4D 2D
D
Changing diameter installation
When changing from a smaller diameter to a larger one use a connector
diffuser with the maximum opening angle of 12°.
max 12°
INSTALLATION AND SET-UP
WHILE INSTALLING THE UNIT ENSURE CONVENIENT ACCESS FOR SUBSEQUENT
MAINTENANCE AND REPAIR.
ALL OPERATIONS DESCRIBED IN THIS USER’S MANUAL MUST BE PERFORMED BY
QUALIFIED PERSONNEL ONLY, PROPERLY TRAINED AND QUALIFIED TO INSTALL AND
MAINTAIN VENTILATION EQUIPMENT.
DO NOT ATTEMPT TO INSTALL THE PRODUCT YOURSELF.
IT IS UNSAFE AND IMPOSSIBLE WITHOUT SPECIAL KNOWLEDGE.