10
2.
For the installer
1
The boiler's nominal total output is the sum of the nominal outputs of all heat generators installed in the same boiler / installation room.
2.2.9 Water-side resistance (pressure loss)
Diagram 1 LogWIN water-side resistance
Pressure loss (mbar)
Flo
w
rate
(m
3
/h)
LWP 180T – 505T
2.2.10 Combustion air
The combustion air is drawn directly by the boiler from the installation room. therefore the installation room has to be
adequately ventilated. The combustion air should be directed to the vicinity of the boiler and must be free from pollut-
ants (gases. vapours and dusts). otherwise malfunctions and increased wear (e.g. corrosion) may occur.
DANGER
The configuration of the entire system must comply with the requirements of regional
legislation. applicable regulations. standards and guidelines.
Applicable for Austria (excerpt from ÖNORM H 5170):
The area of the free minimum cross-section must be 5 cm
2
per kW of the boiler's nominal total output
1
.
The opening to the outdoors for combustion air should be designed as follows:
– The flow of air must not be restricted in any way by the weather (e.g. snow. leaves).
– The free cross-section area remains the same when taking the cover grille. discs. etc.. into consideration.
Applicable for Germany (excerpt from the Firing Ordinance. September 2007):
For hearths with a nominal output of not more than 50 kW in total that are dependent on surrounding air. supply of
combustion air will be sufficient providing that every installation rooms has an opening that vents to the atmosphere
with an unobstructed cross-section of at least 150 cm
2
or two openings of 75 cm
2
each. or pipes leading outside with a
technically equivalent cross-section.
CAUTION
Malfunctions or complaints occasioned by inadequate combustion air will not be cov-
ered by the guarantee.