WÄRTSILÄ Vasa R22, Instruction Manual

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21.5 Starting air vessel and piping
The starting air system should be designed so that explosion is
prevented.
An oil and water separator should be included in the feed pipe
between the compressor and the starting air vessel. At the bottom
point of the piping there should be a drain valve.
Drain the starting air vessel from condensate through the drain
valve before starting.
The piping between the air vessels and the engines should be
carefully cleaned when installing. Also later on they should be
kept free from dirt, oil and condensate.
The starting air vessels should be inspected and cleaned with
intervals according to chapter 04. If possible, they should then be
coated with a suitable anti-corrosive agent. Let them dry long
enough.
At the same time, inspect the valves of the starting air vessels.
Too strong tightening may result in damage on the seats, which
in turn causes leakage. Leaky and worn valves including safety
valves should be reground. Pressure test the safety valves.
The filter (20), Fig 21-1, on the engine should be inspected and
cleaned with intervals according to chapter 04. Drain the filter
from condensate with the built-on drain valve.
21.6 Pneumatic system
21.6.1 General description
The engine is equipped with a pneumatic system for control of the
following functions by means of identical solenoid valves:
•
start of the engine
•
stop of the engine
•
starting fuel limitation
•
change-over of the thermostat valve.
The system includes a filter (12), an vessel (6) and a non-return
valve (11) to ensure the pressure in the system in case of lacking
feed pressure.
The main starting valve (8), which is described in detail in
section 22.2, is actuated by the solenoid valve (3) at remote start.
Fig 21-3 shows the solenoid valve. The valve is equipped with a
push button and can be energized manually.
At the same time as the main starting valve is actuated, an
impulse goes to the automatic water separator, which opens
during the starting cycle to expel condensated water separated
by the filter (12).
The starting fuel limiter (15) is described in detail in chapter
22., section 22.7. During the starting cycle it is automatically
22-9601 Starting Air System 21
VASA 22 21-5