Heat Exchanger Cooling - Seawater Inlet System - Beta Marine Beta 14 Installation Manual

EXHAUST HOSE
Wet exhaust hose should be matched to the injection
bend diameter. An engine correctly installed in accordance
with this handbook will meet the emission requirements
of the RCD (Recreational Craft Directive).
EXHAUST BACK PRESSURE
Exhaust back pressure should be as low as possible; it is
increased by long exhaust length and sharp bends. Keep
exhaust systems to a minimum length and have gradual
bends avoid tight angled elbows. Back pressure should be
measured with the complete exhaust system connected
and the generating set running at service speed. The
correct measuring point is before the injection bend (at
the manifold flange).
SEA WATER INLET FOR HEAT EXCHANGER COOLED ENGINES
Beta Marine engines are fitted with a gear driven sea
water pump which sucks in seawater (raw water) to cool
the closed circuit system via the heat exchanger.
1. It is very important that the seawater inlet should
have a strainer system either 'A' built into the sea
cock, or 'B' a high level system with visual inspection
glass (please refer to image 20) mounted just above
the water line.
20 Sea Water Inlet/Filter
'B'
Sea Water Level
'A'
Standard skin fitting without
scoop recommended
Engine
Beta 10 to 60
Beta 45T, 75 & 90
Beta 70T, 85T, 90T, 105T & 115T
Engine
Beta 10 to 25
Beta 30, 35, 38, 45T, 50 & 60
Beta 75 & 90
Beta 70T, 85T, 90T, 105T & 115T
Engine
Beta 10, 14, 16, 20,
25, 30, 35 & 38
Beta 45T, 43, 50 & 60
Beta 70T, 75, 85T, 90,
90T, 105T & 115T
27
Hose I.D
50 mm
60 mm
90 mm
Exhaust Back Pressure
Max. 70 mm Hg
Max. 80 mm Hg
Max. 90 mm Hg
85 to 115 mm Hg
Seacock Inlet/Seawater
Pump Hose I.D
Min. 19 mm
Min. 25 mm
Min. 32 mm