Westerbeke 4.5 KW BCGTE 60Hz Manual del operador Pagina 19
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Exhaust Back-Pressure
The exhaust discharge hose
!111.lfl1
be of adequate size and
minimal run
to
prevent excessive exhaust back-pressure.
Exhaust back-pressure
should be checked before a gener-
ator is put into service. (Refer
to
the illustration.) Excessive
back-pressure will affectthe engine's performance which
af-
fects generator AC power output.
To measure for back-pressure, use a mercury manometer,
a pressure gauge,
or
a water column. A boatyard
or
marine
mechanic
should have a manometer
or
a pressure gauge.
If the generator set does not have a tapped hole
in
its ex-
haust elbow, one must be drilled and tapped for a 1/8 inch
NPT fitting
in
the
dry
area of the elbow.
Measure the engine's back-pressure at the exhaust elbow
while
the generator is under a full-load.
Refer
to
the pressure specifications listed below.
A water column can be made by taking a clear plastic tube
and taping one end
of
the tube along a yardstick and fitting
the other end of the tube with a
1/8 inch NPT (National Pipe
Tap) pipe fitting.
Measure the engine's back-pressure at the exhaust
elbow
while
the generator is under a full-load.
Dimension A cannot exceed 39 inches of water.
Back pressure, as measured by
a gauge instrument, should
not
exceed the following specifications:
3 inches
of
mercury (0.104 kg/cm
2
)
39 inches
of
water in a water column
(.099 kg/cm
2
at 4
0
C)
22 ounces psi
11/2
psi
Mercury
Manometer
~~~
Plug
\
-Insulation
Exhaust
Elbow
Exhaust
,1,-...0.-"'-
\
Excessive back-pressure can be caused
by
a small diameter exhaust hose, a small muffler, sharp bends
in
the exhaust hose, improper fittings, water pockets, and a high volume
of
water
in
the exhaust system due
to
the length
of
the exhaust discharge hose. The use of elbows and fittings
in
the exhaust discharge hose's
routing
should be limited since these will create flow restrictions and contribute
to
exhaust back-pressure.
The generator's exhaust
system!111.lfl1
be separate from any other engine's exhaust system. Dry portions of
the exhaust system between the engine's exhaust
manifold and the water injected exhaust elbow
!111.lfl1
be
insulated
to
hold in the heat.
Westerbeke
Generators
16
- /-vtT' 1
- Engines & Generators 2
- SAFETY PRECAUTIONS 3
- 1 Westerbeke Generators 4
- WESTERBEKE 5
- 5 Westerbeke Generators 8
- So,IAnoirl 10
- 8.34 inches (465.8 11
- Westerbeke Generators 13
- C1ll1ieL 15
- 10' 16
- MOUNTING 17
- " 18
- A boatyard 19
- ---;P4' 20
- 3 Ib-It 21
- 45' 21
- '" 22
- OPERATED 23
- !11.LlS1 24
- 33 CFR-183 which 25
- + ) battery connection 26
- 25 Westerbeke Generators 28
- 600 rpm. The 29
- PREPARATIONS FOR STARTING 30
- ~WARNINGi 31
- + path for voltage to 32
- 1500 rpm 33
- 50 hertz 33
- 10 hours 33
- 33 Westerbeke Generators 36
- IGNITION 38
- (Rectifier Mounting Hole) 39
- Integral Controller (I.C.) 40
- +1' 41
- .Of-----~jll 42
- "" 43
- I I j I 44
- (' 46
- FUNCTION 47
- MANIFOLD 47
- PRESSURE 47
- REPLACE 48
- Crankshaft 49
- COOLANT 50
- -itm~mt 51
- 'I' 52
- II': 52
- ;,:;:,' 52
- Weslerbeke Generators 53
- L _________ 54
- 5. Refer 55
- G~NERATOR·S 56
- 4e::::a3 57
- ~~:]Sh'P' 58
- Westerbeke 59
- Generators 59
- * Note that 60
- (before each use) 66
- 65 Westerbeke Generators 68
- Pointer 69
- 67 Westerbeke Generators 70
- 'r<W 71
- TIGHTENING 72
- SEQUENCE 72
- I' 73
- Do not replace the 75
- Do not reinstall 75
- & 28 80
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