Vallox Slim-Line
PTXPA MC COOKER HOOD
Measuring and adjusting PTXPA MC performance
Basic air flow measurement
Boost air flow measurement
2
3
4
5 6 7 8 10
20
30
40 50
70
10
20
30
40
50
60
80
100
200
300
400
Static pressure loss Pa
Air volume flow rate, dm
3
/s
20 holes open
60
80
30 holes open
60 holes open
40
holes open
50
holes open
70 holes open80 holes open
DAMPER OPEN
DAMPER OFF
25 dB (A)
30 dB (A)
35 dB (A)
40 dB (A)
40 dB (A)
35 dB (A)
30 dB (A)
25 dB (A)
Basic ventilation
• When the damper is in the off position, the volume flow rate of the air in the cooker
hood can be measured and adjusted if needed on the basis of the static pressure loss
of the cooker hood and the adjoining performance curves.
• Measure static pressure loss of the cooker hood in the damper hole using the
measuring tube in the accessory bag (see the figure).
• Using the measured pressure and the number of open holes in the damper, you can
read the air volume flow in the adjoining curves.
Adjustment:
• Use the magnetic tape supplied with the cooker hood to conceal the needed number
of holes in the damper.
Boost ventilation
• When the damper is in the open position, the volume flow rate of the air in the cooker
hood can be measured on the basis of the static pressure loss of the cooker hood and
the adjoining performance curves.
• Measure static pressure loss in the cooker hood. The measuring point has to be by 2
x duct diameter size above the outlet collar of the cooker hood (see the figure).
• You can read the air volume flow using the measured pressure and the adjoining
curves.
MOUNTING INSTRUCTIONS
© VALLOX • We reserve the right to make changes without prior notice
3
Measuring point,
min. 2 x duct diameter
