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RDM-035-0922
13
®
NORD
canopy
|
aSAP
3. Measuring and adjusting airflow
NORDcanopy canopies are fitted with measuring nozzles located inside the canopy.
In order to adjust supply airflow, the position of the adjusting plate located in the supply chamber is adjusted.
The exhaust airflow adjustment plate is located behind the HFK grease filters. Lock the adjustment plate in
place using the butterfly nuts!
K-factor for measuring airflow
• Exhaust K-factor = 16,6 (per 1 filter)
Supply air
K-factor, per 1 m of front panel
SPx0
SPx1
SPx2
SPx3
SPxK
Front panel*
-
19,2
32,3
50,4
-
AirGrip
2,4
-
-
-
-
Side panel*
-
-
-
-
6,6
* The supply panel k-factors above include the “AirGrip” air capture system K-factor.
* If the side panel has perforation, add the side panel k-value to the front panel k-value.
Calculation example:
Supply air canopy L=2 meter with SPx2 front panel.
Calculation of the supply air volume:
Pressure in the supply air chamber is 26 Pa
Front panel SPx2 k-factor is 32,3
Calculation of the exhaust air volume:
Pressure in the exhaust air chamber is 22 Pa
4 x HFK grease filter k-factor is 16,6
ATTN
! During measurement, HFK all grease filters and blind plates
must be in place and the front panel must be closed.
Q
v
=k√∆p
m
Q
s
=2
×
32,3
×
√26 = 330 l/s
Q
e
=4
×
16,6
×
√22 = 312 l/s
