TESTO 300 LL NEXT LEVEL Instruction Manual page 78

9 Performing the measurement
windows, and if applicable blinds, and lay external capillary hose (for
reference pressure), check zero point on the reading display, start pressure
progression recording, wait approx. 30 seconds with open window or
external door to register zero line.
2. Start up firing installation(s) and set to maximum power. For manually loaded
firing installations for solid fuels, full load operation must be achieved. All
available air extraction equipment should be started up. The process must
involve the measurement recording the most unfavourable condition, that is
the evaluation should be carried out with the air extraction system(s) at the
highest level of power. In cases where the ventilation equipment is not
located in the same room as the firing installation, all doors and openings
between the room where the firing installation is set up and the ventilation
equipment are to be kept open. The zero point should not change after
starting up the firing installation and air extraction equipment with the
window or external door of the equipment room open.
3. Close door/window, wait approx. 30 seconds, check underpressure, check
clean extraction of the flue gases. If a blind is present on the
window/external door of the equipment room, this should be closed and
opened at the same time in each case.
4. Open door/window, wait approx. 30 seconds, zero line must be reached
again.
5. Close door/window, wait approx. 30 seconds, check underpressure, check
clean extraction of the flue gases.
6. Open door/window, wait approx. 30 seconds, zero line must be reached
again.
7. Close door/window, wait approx. 30 seconds, check underpressure, check
clean extraction of the flue gases.
After the measurement, the result can be printed out and evaluated. If the
underpressure in the room where the firing installation(s) is/are set up is
constantly below 4 Pa, or with tested firing installations for solid fuels that are
not dependent on indoor air below the maximum permissible underpressure
specified in the proof of usability (currently 8 Pa in principle), then the safe
simultaneous operation of the firing installation and air extraction system(s) is
possible.
Careful execution of the measurement in accordance with the steps listed above
enables a correct evaluation and rating of the safe operation of the firing
installation(s) and indoor air extraction system(s).
The measurement result represents the evaluation of the current status, taking
into account the devices available for the test and influencing the result
(combustion plants and air extraction system(s)) and the condition of the
building (e.g. windows and doors). A new evaluation is required when there is a
change to the firing installation, to any other devices that have an influence or to
the building.
Repeat checks:
78