12
May 2003 / WHISPER 20 ULTRA / USA
INFORMATION
2.5.13
Technical data
GENERAL
Model
WHISPER 20 ULTRA
RPM 1800
rpm
Alternator
water cooled, synchronous
Engine
Mitsubishi diesel, model S4Q2 (Japan)
Number of cylinders
4
Displacement
153 cubic inches (2505 cm
3
)
Bore X stroke
3,46 x 4,06 inches (88x103 mm)
Combustion air consumption
88 cf/m (2,5 m3/min.)
Continuous power 50Hz
20 kW
Cooling system
indirect cooling by raw water, 20-25 l/min.
Cooling water pump
pto driven Mastervolt self priming impeller pump, type M16
Fuel lift pump engine
mechanical pump, additional electric 12V pump available upon request
Starting battery (optional)
110 Ah12V
Fuel consumption
0,53 - 2 US gallon/hour (2-7 litre/hour), load dependent
Control
Digital Diesel Control including automatic start/stop
ELECTRICAL SPECIFICATIONS
Output voltage
120/240V 60 Hz alternating current (AC) single phase
Output rating 50Hz
20 KVA = 20 kW at power factor cos phi = 1
Voltage tolerance
± 5% (optional voltage regulator ±2%)
Frequency tolerance
± 5%
Optional electronical Governor
± 1%
Alternator
brushless, four pole, synchronous
Voltage regulation
cap AVR (optional)
MECHANICAL SPECIFICATIONS
Supply includes
generating set, built into tugged GRP sound shield with steel base plate,
mounted on rubber anti vibration mounts
Dimensions hxwxd
45,28x26,77x29,57 inches (1150 x 680 x 750 mm)
Colour
top white, bottom green
Weight
926 lbs. (420 kg) including canopy
Max. installation angle
25 degrees
Standard supplies
remote panel ± 45 ft. (+15 m cable), fuel filter, fuel lift pump, user and installation
manuals
Optional
installation kits, mobile (vehicle) version, non earth return, (ungrounded)
spare part kits, PTO to drive hydraulic pump
2.5.12 Cooling liquid
The engine is cooled by cooling liquid. The capacity of
this system of the Whisper 20 ULTRA is 7,6 US qts (7,2
l).
We recommend not using water but cooling liquid that is
marketed for the use in combustion engines. Cooling
liquid protects the engine against frost until minus 25° C.
Also it protects the engine block against corrosion. One
can fill the engine via the filling cap on the exhaust
manifold. Fill up till the level is just below the filling cap.
When the engine is on temperature the liquid will expand
and the redundant liquid will be pressed into the
expansion tank. This tank has to be filled up till the mark.
When cooling liquid is not available clean fresh water
could be used with an additive of anti freeze. When using
water with anti freeze the right mixture has to be cal-
culated according to the information of the supplier of the
anti freeze. When the cooling is based on keel cooling or
radiator cooling the capacity of these coolers and piping
has to be taken into account calculating the right mixture.
The cooling liquid in the engine is pressurised and has a
boiling point above 212°F (100° C). The temperature
switch in the thermostat housing switches at 230°F
(110° C). When keel cooling or radiator cooling is applied
the cooling system is not pressurised. There should be a
special cap on the manifold without valves leaving the
connection to the expansion tank open. Refer to the
special manual on keel cooling and radiator cooling.