referenced standards, or overloading.
3.3.2.1
Backflow Preventers
Backflow preventers shall be tested by locally approved and certified
backflow assembly testers. A copy of the test report shall be provided to
the Contracting Officer prior to placing the domestic water system into
operation, or no later than 5 days after the test.
3.4
TESTING, ADJUSTING, AND BALANCING
**************************************************************************
NOTE: Use the first sentence for simple hydronic
systems and where Section 15950, "HVAC
Testing/Adjusting/Balancing" is not included in the
specifications. Use the second sentence for all
specifications with Section 15996.
**************************************************************************
[Except as specified herein, perform in accordance with SMACNA HVACTAB,
Chapter VIII "Hydronic System TAB Procedures," drawings and specifications;
prepare complete report of final test results.] [Test, adjust, and balance
the hydronic system in accordance with Section 15950N HVAC
TESTING/ADJUSTING/BALANCING.]
3.4.1
Markings of Settings
Following final acceptance of the balancing report, the settings of all
valves, splitters, dampers, and other adjustment devices shall be
permanently marked so that adjustment can be restored if disturbed at
anytime.
3.4.2
Sound Level Tests
Upon completion of testing and balancing of hydronic systems, conduct sound
level tests of conditioned spaces. Use sound level meter required by ANSI
S1.4, Type 2, calibrated in accordance with NBS standards and guidelines,
and accompanied by a certificate of calibration. Record sound levels in
dBA with heating systems off and with heating systems operating. Record
the following data for each room and system:
a.
Background sound level (systems off);
b.
Total sound level corrected for background; and
c.
Sound power rating by manufacturer of the respective outlet.
Test Locations: Take sound level reading at location 2 meters 6 feet from
face of each outlet on a line at 45 degrees with face of outlet. Remedial
Action: If sound level at any observation point exceeds [20] [45] [_____]
dBA, take remedial action as directed.
3.5
SCHEDULE
Some metric measurements in this section are based on mathematical
conversion of inch-pound measurement, and not on metric measurement
commonly agreed to by the manufacturers or other parties. The inch-pound
and metric measurements shown are as follows:
SECTION 15185N
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