FläktGroup DC_10685GB 20221101_R0 Specifications are subject to alteration without notice.
2
OPTIVENT
®
ULTRA with 327VMZ-BN - Installation, Commissioning, Maintenance
INSTALLATION
Installation Size Minimum
safety distance
Velocity in the duct (m/s)
0,5 - 1 > 1 > 4
In the straight tube
100 - 630 3 x D ± 8% or 1 l/s ± 5% ± 4%
Type of flow disturbance
(only applies to a single type of disturbance) Installation case Size Minimum
safety distance
Velocity in the duct (m/s)
0,5 - 1 > 1 > 4
Bend
100 - 400 0 x D ± 10% or 1 l/s ± 8% ± 6%
100 - 250
315, 400
0 x D ± 10% or 1 l/s ± 8% ± 6%
T-piece 1
100 - 400 0 x D ± 10% or 1 l/s ± 8% ± 6%
100 - 250
315 - 400
0 x D
1 x D
± 10% or 1 l/s ± 8% ± 6%
100 - 125
160 - 250
315 - 400
0 x D
1 x D
-
± 10% or 1 l/s ± 8% ± 6%
MEASURING ACCURACY
For the best possible accuracy, it is recommended to install the air volume damper so that it is preceded by a straight duct, at least 3 x D safety dis-
tance.
Valid when the damper blade opening is > 30%. Recommended maximum air velocity with shorter than 3 x D safety distances is 8 m/s.
Adequate safety distance is recommended after the type of flow disturbance (3 x D).
With sizes 500 and 630 should the safety distance be at least 3 x D.
The motor/ultrasound shall be placed as shown on the pictures above.
*) recommended position
*)
When using the minimum safety distance after the type of flow disturbance, the installation parameter must be set according to the commissioning
section (p. 8-9) to achieve the accuracies.