enclosure is provided, the enclosure, the muffler, and intake
silencer shall be modified or replaced as required to meet the
sound requirements contained within this specification.] [If a
sound limiting enclosure is not provided, the muffler and air
intake silencer shall be modified or replaced as required to meet
the sound limitations of this specification. If the sound
limitations can not be obtained by modifying or replacing the
muffler and air intact silencer, the contractor shall notify the
Contracting Officer and provide a recommendation for meeting the
sound limitations.]
w.
Manually drain off fuel slowly from the day tank to empty it to
below the low fuel level limit and record the level at which the
audible alarm sounds. Add fuel back to the day tank to fill it
above low level alarm limits.
3.5.5
Performance Tests
3.5.5.1
Continuous Engine Load Run Test
**************************************************************************
NOTE: If contractually possible, specify an ambient
temperature for the load run test which is typical
for the average maximum temperature. This is the
most strenuous operating condition. Specify a month
which typically provides the most restrictive
operating condition.
**************************************************************************
The engine-generator set and ancillary systems shall be tested at service
load to: demonstrate reliability and durability; verify that heat of
extended operation does not adversely affect or cause failure in any part
of the system; and check all parts of the system. If the engine load run
test is interrupted for any reason, the entire test shall be repeated. The
engine load run test shall be accomplished principally during daylight
hours, with an average ambient temperature of [_____] degrees C degrees F,
during the month of [_____]. After each change in load in the following
test, measure the vibration at the end bearings (front and back of engine,
outboard end of generator) in the horizontal, vertical, and axial
directions. Verify that the vibration is within the allowable range.
Measurements are to be recorded after stabilization of an engine-generator
set parameter (voltage, frequency, current, temperature, etc.).
Stabilization is considered to have occurred when measurements are
maintained within the specified bandwidths or tolerances, for a minimum of
four consecutive readings. Data taken at 15 minutes intervals shall
include the following:
a. Electrical:
Output amperes, voltage, real and reactive power, power
factor, frequency.
b.
Pressure:
Lube-oil.
c.
Temperature:
Coolant.
Lube-oil.
Ambient.
(1) Perform and record engine manufacturer's recommended
prestarting checks and inspections. Include as a minimum checking
of coolant fluid, fuel, and lube-oil levels.
SECTION 16264A
Page 64
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