3.1.17
machinery with sufficient extra length to permit [50 mm] [2 inch] [_____]
minimum displacement in any direction without damage.
3.1.18
Systems Not To Be Vibration Isolated
Do not provide vibration isolation for electrical raceways and conduits or
for fire protection, storm, sanitary, and domestic water piping systems
which do not include pumps or other vibrating, rotating, or pulsating
3.2
FIELD QUALITY CONTROL
Provide equipment and apparatus required for performing inspections and
tests. Notify Contracting Officer [14] [_____] days prior to machinery
[sound] [vibration] [seismic] testing. Rebalance, adjust, or replace
machinery with noise or vibration levels in excess of those given in the
machinery specifications, or machinery manufacturer's data.
3.2.1
Field Inspections
Prior to initial operation, inspect the vibration isolators [and seismic
snubbers] for conformance to drawings, specifications, and manufacturer's
data and instructions. Check for vibration and noise transmission through
connections, piping, ductwork, foundations, and walls. Check connector
alignment before and after filling of system and during operation. Correct
misalignment without damage to connector and in accordance with
manufacturer's recommendations.
3.2.2
Spring Isolator Inspection
After installation of spring isolators or protected spring isolators, and
seismic restraint devices, the machinery shall rock freely on its spring
isolators within limits of stops or seismic restraint devices. Eliminate
3.2.3
Tests
Adjust, repair, or replace isolators as required to reduce vibration and
noise transmissions to specified levels.
3.2.3.1
Equipment Vibration Tests
Perform vibration tests to determine conformance with vibration isolation
schedule specified [specified] [indicated].
3.2.3.2
Equipment Sound Level Tests
Measure continuous or intermittent steady state noise with a sound level
meter set for low response. Measure impact or impulse noise as dB peak
sound pressure level (20 uPa) with an impact noise analyzer. Measure work
distance from person to machinery noise center. Perform sound level tests
to determine conformance with sound level schedule [specified] [indicated].
a.
Interior Machinery Sound
In accordance with ARI 575, measure the sound data for air
SECTION 15070N
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