Lowara GEMK Serie Instrucciones Para La Instalación Y El Uso página 87

Use the following formula for verification:
Q= Total heat input into the room, including engine radiance, expressed in [kcal/h].
Cp = Specific heat of air at constant pressure expressed in [kcal/m 3 °C], the value is obtained from the normogram shown
below.
Vr = air capacity of engine radiator fan in [m 3 /h]
ΔT = Tv-Ta= difference between the temperature of the air affecting the radiator (Tv) and the temperature of the outdoor air
supplied to the room (Ta) expressed in [°C]
Intersection of central scale with the straight line that joins temperature and pressure.
If an extractor fan is installed, the applicable formula is the following:
Where
Q= Total heat input into the room expressed in [kcal/h]
Cp = Specific heat of air at constant pressure expressed in [kcal/m 3 °C], the value is obtained from the normogram shown
below.
Vt = Vr+Ve = total air capacity of engine radiator fan (Vr) and extractor fan (Ve) expressed in [m 3 /h]
Δ tmax = Tmax -Ta= difference between the maximum temperature of the air affecting the radiator (Tmax) and the temperature
of the outdoor air supplied to the room (Ta) expressed in [°C]
From the reverse formula we obtain the Vt value and consequently, by subtraction, Ve.
3.12 Sump breather vent
In most cases, the engine sump breather vents into to the engine intake system. If necessary, part of it can be vented outdoor (
see engine instructions).
The connecting pipe must be of suitable diameter, proportional to the length, and must be designed to
ATTENTION
prevent condensate pockets that could obstruct the breather flow. Provide a condensate collection
system that can be drained periodically. The condensate, together with the exhausted oils, must be
delivered to authorized waste collection and disposal centers.
The breather should vent outdoor away from doors, windows and air intakes.
Cp determination NORMOGRAM
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