WÄRTSILÄ WARTSILA32, Product Manual, Page: 129 / 254

8.3.5 Air filter, air assist inlet (3F03)
Condense formation after the water separator (between starting air compressor and air vessels)
create and loosen abrasive rust from the piping, fittings and receivers. Therefore it is
recommended to install a filter before the starting air inlet on the engine to prevent particles
to enter the starting air equipment.
An Y-type strainer can be used with a stainless steel screen and mesh size 400 µm. The
pressure drop should not exceed 20 kPa (0.2 bar) for the engine specific air assist consumption.
8.3.6 Air assist (for 560 & 580 kW/cyl)
A receiver air injections system (air assist) is installed on all auxilliary and diesel electric
applications. If the first load step of 0-33% is required then air assist is to be connected and
used. If the system is designed for 0-28-60-100% load steps, the air assist do not have to be
connected or used.
The air assist is controlled by UNIC. The consumption for one air assist activation can be
found in the Technical data (3-1) section.
The air supply to the air assist is to be arranged from a separate air vessel or alternatively from
the starting air vessels. Air supply from the starting air vessels must be approved by
classification society, this must be checked on a project specific basis.
Air assist consumption is depending on the operation profile of the vessel, it is only activated
when initial load is below ~15%.
Wärtsilä 32 Product Guide - a21 - 7 September 2016 8-9
8. Compressed Air System Wärtsilä 32 Product Guide