Measuring and adjusting the air flows of the cooker hood

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.

  • The static pressure loss is measured from the hole in the damper using the measuring tube found in the accessory bag (see 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.
Table 1. Standard ventilation of the cooker hood (settings 2-8) - damper in the closed position
Adjustment position Holes of the damper open
2 2
3 3
4 4
5 5
6 6
7 7
8 8

Air flow measurement points

Air flow measuring tubes are placed in the ventilation ducts in accordance with the instructions. The standard air flow from the cooker hood is measured past the damper. The fan curves indicate the total pressure accounted for by duct losses.
  • A Supply air
  • B extract air
  • C Cooker hood extract air
  • Supply air fan
  • Extract air fan
Figure 1. Vallox 51 MV (left) Vallox 51K MV (right)

R model in the figures. In the L model, the order of the ducts is mirrored.