Westerbeke 4.5 KW BGC -60Hz Manual del operador Pagina 25
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Exhaust Back-Pressure
The exhaust discharge hose must 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 affect the engine's performance and the
generator's 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.
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 1/4 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:
Specifications:
3 inches
of
mercury (0.104 kg/cm
2
)
39 inches
of
water
in
a water column
(.099 kg/cm
2
at
4°
C)
22 ounces psi
1 1/2 psi
"
..
"
"
"
."
..
Ii
~.
Mercury
Manometer
1/.
NPT
Plug
\
\
Exhaust
Elbow
Exhaust
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 must be separate from any other engine's exhaust system. Dry portions of
the exhaust system between the engine's exhaust
manffold and the water injected exhaust elbow must be
insulated
to
hold
in
the heat.
Weslerbeke
Generators
22
- WESI'ERBEKE 1
- Engines & Generators 2
- SAFETY PRECAUTIONS 3
- I WESTERBEKE 5
- Generators 6
- Understanding 8
- Ordering 8
- Marine Gasoline Generator 12
- Pressure 12
- Westerbeke Generators 12
- & Stroke 17
- 90 - 125 (Ampere-Hours) 19
- ± 3 Hertz (5%) 20
- MOUNTING 23
- """u"i 24
- ." 25
- :' 26
- 35 Ib-in, or 0.27 27
- --"..::---~~-~~.:::.-.: 28
- -:::::=:~--:-d 28
- _'-'...\ 28
- ELECTRICALLY 29
- DEFLECTION 30
- Automatic Shutdown 31
- + ) battery connection 32
- 4.0KW, and page 17 for the 33
- (NORMRL 36
- C) before ap 37
- + path for voltage to 38
- SCREENED 41
- CLEANER 41
- IIPPIIOII£II 42
- ~~~::-t--Magnet 43
- IGNITION 44
- + and - 45
- O.C.Charge 46
- 't~ 47
- ;l' 48
- . " 49
- 1~~I~:r~25f~~2r~t~:t 50
- "r 52
- FUNCTION 53
- MANIFOLD 53
- PRESSURE 53
- CRAUSHAFT 55
- OVERHERT 56
- 44m#¥tlw*!2:o#i@> 57
- IlliI'III1T?" 58
- Westerbeke 59
- Crankcase 59
- '-'0 60
- 60
- 110v 50 Hz 61
- 220v 50 Hz 61
- '" 62
- ~WARNINGI 63
- "'" 64
- 1 b 4 3 65
- ,,--> 66
- 60 120 240 68
- + ) at overspeed switch 69
- H the bear 75
- -\--~~~ 76
- HuntinglBeculatjQo 77
- 75 Westerbeke Generators 78
- ~~~Yl~~~~~~~ 79
- 8(G Ii.SlW 80
- TIGMTEKIKG 80
- SEQUENCE 80
- 360'. The valves for 81
- 9.4 Ib·ft (0.7 - 1.3 kg-m) 81
- If batteries are 85
- 1.5 - 1.8 87
- YOUR NOTES 95
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