3.3.2
Contractor's Field Testing
Calibrate field equipment and verify equipment and system operation before
system is placed on-line. Include the following tests in field testing.
3.3.2.1
Tubing and Wiring Integrity Tests
Test tubing system pneumatically at 1.5 times the design working pressure
for 24 hours. Allowable leakage rate is that which produces a pressure drop
7 kPa (gage) 1 psig in 24 hours with compressed air supply turned off.
Test wiring for continuity, ground faults, and open and short circuits.
3.3.2.2
System Inspection
Observe HVAC control system in shutdown condition. Check dampers and
valves for proper normal positions. Document positions for the performance
verification test report.
3.3.2.3
Calibration Accuracy and Operation of Input Test
Verify correct calibration and operation of input instrument. For each
sensor and transmitter, including for temperature, pressure, relative
humidity, and dew point inputs, record the reading at the sensor or
transmitter location using calibrated test equipment. Record the output
reading provided by that sensor or transmitter. Document each of these
location and output readings for the performance verification test report.
The test equipment shall have been calibrated within one year of the date
of use in the field. Test equipment calibration shall be traceable to the
measurement standard of the National Institute of Standards and Technology.
3.3.2.4
Operation of Output Test
Check the operation of output to verify correct operation. Operate analog
device to minimum range (e.g., 4 mA) and maximum range (e.g., 20 mA), and
measure and record actual output values.
3.3.2.5
Actuator Range Adjustment
With the controller, apply a control signal to each actuator and verify
that the actuator operates properly from its normal position through to the
full range of stroke position. Record actual spring ranges and normal
positions for modulating control valves and dampers.
3.3.3
Coordination With HVAC System Balancing
Tune the control system after air and hydronic systems have been balanced,
minimum damper positions have been set, and a report has been issued.
3.3.4
Field Test Documentation
Before scheduling the performance verification test, provide field test
documentation and written certification of completion to Contracting
Officer and the Naval Energy and Environmental Support Activity (NEESA),
that the installed system has been calibrated, tested, and is ready to
begin the performance verification test. Do not start the performance
verification test prior to receiving written permission from the Government.
SECTION 15901N
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