Volpi Tecno Energia PAGURO 8500, Руководство пользователя и по обслуживанию

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6 INSTALLATION ERRORS
Mod. PAGURO
6000/9000/14000/18000/6500/8500
Date: 12.03.2020_Rev: 0.0
1
6. INSTALLATION ERRORS
A big number of marine generators of any type and manufacturers, after the first installation on board, are
flooded by sea water causing severe damages to the engine with consequent high repairing costs, improperly
claimed in warranty but gently refused, because it always depends from a critical/wrong installation, made
compromising some physical rules.
The following paragraphs list the most common errors that can occur and that must be avoid.
6.1 WATER INTAKE
- Seawater intake oriented towards sailing direction, causing a dynamical pressure that, when the
generator is not running, let flow sea water through the cooling pump, reaching the exhaust pipe and
consequently the engine exhaust valve, flooding the cylinder and the oil sump.
- On a high-speed motorboat, a neutral flush hull mounted water intake can cause as well dynamical
pressure due to the hull gradient compared the sea surface, or the decreased water line level before
reaching the proper trim.
NOTE: To avoid the risk, the water intake entrance must be fitted facing the rear position and even
so, in critical sailing conditions the internal valve must be closed when the generating set is not in
operation.
6.2 WATERLINE
- Installation below the seawater level without a proper cooling pipe goose neck and siphon-break valve.
- If the generator installation surface is just a little below the external sea water level, foresee an external
goose neck pipe with siphon break valve, on the contrary drop by drop an internal leakage through the
pump clearance, fills the exhaust pipe with the same above explained result. For relevant level
difference the leakage occurs when the boat is not sailing too.
NOTE : The valve must be positioned outside the generator in the highest position possible, but in any
case, at least 50 cm above the waterline and must be connected, by interposing it to any pipe of the
cooling circuit, in the delivery zone of the pump, suitably extending the relative pipes. The
soundproofing capsule must be drilled in the most suitable position to allow the pipes to come out. For
each model of Paguro generator the optimal position may be different, but any piping in the pressure
zone is suitable for the purpose.
6.3 EXHAUST LINE
- An exhaust line trapping too much water for length excess or negative gradient course, that return
back into the engine when the generator is shut off.
- The first water lock muffler is designed for avoiding that risk, but if fitted not enough lower than the
engine manifold either reversing the entrance with the outlet, or of too reduced capacity for the return
water volume that has to contain, can be unable avoiding the problem.
- Care must be taken in designing the exhaust pipe course, preferring the alternatives that keep self-
draining towards outside as more pipe stroke as possible.
- In any case, to be sure of a correct and safety installation, especially during the first employment
season, check often the lubrication oil integrity watching the engine steak level: a transparent yellow
oil if new or a black colour if old, mean no water entrance, but an emulsion similar to milk white/yellow
not transparent or worst an increased level into the sump mean water flooding.