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Installation instructions
For open gensets installed indoors, we recommend:
•
The dimensions of the air outlets be such that they
have at least the same area of the radiator;
•
the dimensions of the windows for air outlet is at
least on the surface of the radiator.
•
The dimensions of the air inlets be such that they
have at least the same area of the radiator +10% for
gensets up to 130 kVA or +25% for gensets beyond
130 kVA;
For canopied gensets installed indoors, we recommend:
•
The dimensions of the air outlets be such that they
have at least the same area of the generator air out-
lets, as indicated at page M2.7 of the present ma-
nual;
•
The dimensions of the air inlets be such that they
have at least the same area of the generator air in-
lets, as indicated at page M2.7 of the present ma-
nual +10% for gensets up to 130 kVA or +25% for
gensets beyond 130 kVA;
The opening area has to be calculated considering pro-
tection grill surface, in order to insure that remaining free
area is sufficient.
Dimensions of openings calculated as above indica-
ted, are the minimum acceptable dimensions in case
of L.T.P. use; the pressure remaining after radiator and
back pressure must be considered while planning di-
mensions of the piping.
To calculate the opening section check below drawing:
a
Radiator surface
b
Free opening
Air flow opening with grill and 80% of open
c
surface
d
Air flow opening with baffle plates
WARNING: to avoid reflux of heated air and loss of load,
add an air duct between radiator and opening.
To consider the correct quantity of heat to be dischar-
ged, loss of heat on duct should be evaluated. If the duct
is not appropriately insulated, room-temperature may in-
crease considerably, for this reason it may be necessary
to install an electro ventilator for correct air exchange.
Electro ventilator capacity can be calculated as follows:
Fan Capacity [m
/h]=
3
Considering:
• heat to radiation is indicated on engine/alternator
technical data sheet;
• 0. 287 is specific heat for each m3 of air at 20°C;
• Δt in °C is usually considered as equal to 5 °C
(worst conditions are considered).
Exhaust piping
Exhaust piping must be built in accordance to laws in
force in the country of installation.
General indications:
• Minimum required thickness: 2.0 mm;
• Diameter of piping has to be calculated considering,
length, number of bends, type of exhaust muffler,
and any other accessory used on it. Back pressure
should not exceed values provided by manufac-
turer, as this causes loss of power and damage to
the engine.
ATTENTION
Exhaust piping may reach up to 600 °C during
operation, therefore it is compulsory to cover pi-
ping with appropriate insulation.
• Exhaust piping should be composed of parts, con-
nected by flanges with gaskets, for easy disassem-
bling and grant maximum tightness.
• Exhaust piping should be connected to engine by a
flex that should absorb dilatation and separate fix part
from engine piping.
• Exhaust piping should not weigh on engine manifold.
DANGER
Engine exhaust gas contains carbon mono-
xide, harmful to health and in large quantities
can cause intoxication or death.
M
2.6.3
REV.0-06/10
Transmitted heat [Kcal/h]
0,287
∆t [°C]
x
!
!
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