19
Ref. P.12
in acoustic enclosure will be less due to higher
restrictions.
Ventilation fans are must for HE cooled gensets.
P.10 Exhaust piping inside the enclosure must be lagged
(except bellow).
P.11 Temperature rise inside the enclosure should not be
more than 5
0
C for maximum ambient above 40
0
C and
it should be below 10
0
C for ambients below 40
0
C.
P.12 Radiator cooled engines may create slight negative
pressure inside the enclosure. Maximum static
restriction should not increase 6 mm of water column.
P.13 There should be provision for oil, coolant drain and fill.
Fuel tank should have provision for cleaning.
ROOF TOP INSTALLATION
Roof top installations should be considered when there is no
ground or basement level room available or when the cost of
high level installation - including structural work - is cheaper
than normal installations.
Advantages
) No air flow problems
) No expensive duct work
) No lengthy exhaust runs
) No problems with exhaust fume emissions
) No noise problem
) No space limitation problems
Roof structure
The structure of the roof area must be suitable for an installation.
The strength of the flooring structure is vital. Should the floor
be found unsuitable the problem can often be overcome by
installing a floating floor of structural steel platforms across
the building’s main columns.
Vibrations
Transmitted vibration through the building can be drastically
reduced by :
a) Having built-in anti-vibration units within the design of the
generating set. This eliminates up to 75-80 % of
transmitted engine vibrations.
b) Installing additional vibration dampers between the
generating set chassis and the roof. This combination
eliminates up to 98% of the vibration.
c) It is recommended to use spring AVMs for roof top
installation.
Roof Top Installation
Roof Top Installation
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