7
© Vallox Oy - All rights reserved
Vallox
Delico
PTD AC
MEASURING AND ADJUSTING THE AIR FLOWS
Standard ventilation
The volume flow rate of the air inside the cooker hood is
measured with the damper closed and, where required,
adjusted based on the static pressure loss and the
performance scheme of the cooker hood.
• Measure the static pressure loss of the cooker hood by
pushing the probe through the hole in the damper (see
the figure).
• Determine the volume flow rate from the performance
scheme based on the measured pressure and the
number of open holes in the damper.
Adjustment:
• Cover the required number of holes in the damper with
the magnetic strip that is delivered with the cooker
hood.
MANU
AL
dp
>2 x ø
ø
Boost ventilation
The volume flow rate of the air inside the cooker hood
is measured with the damper open based on the
static pressure loss and the performance scheme of
the cooker hood.
• Measure the static pressure loss of the cooker hood.
The measuring point must be located 2 times the
duct diameter above the outlet collar of the cooker
hood (see figure).
• Determine the volume air flow based on the
measured pressure and the performance scheme
(with the damper open).
dp
K VALUES
Adjustment
position
Holes of
the damper
open
K value
2
2
0.5
3
3
0.6
4
4
0.8
5
5
1.0
6
6
1.1
7
7
1.3
8
8
1.4
Damper
open
4.9
S
TAND
ARD VENTILA
TION
5
6
7
8
15
20
30
40
50
60 70
10
20
30
40
50
60
70
80
90
200
250
300
400
500
10
100
Measured pressure with a probe P
a without a grease filter
Air flow dm³/s
4
3
2
5 6 7 8
Measured pressure with standard ventilation
Damper open
Adjustment position
L
pA,
bB(A)
