3.5
TESTING, ADJUSTING, AND BALANCING
3.5.1
TAB Procedures
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NOTE: Where specific TAB Procedures are not covered
in the TAB Standard and the designer feels that the
level of complexity of the HVAC system or the
critical nature of the area served warrants,
procedures should be developed and added to this
paragraph. During the TAB of kitchen exhaust hoods,
incorrect building air flows may affect the
performance of fans. Opening of kitchen entrance
doors may produce correct exhaust hood air flows
while closed doors yield deficient readings. TAB of
kitchen exhaust hoods should be performed after
make-up air flows are balanced and with the kitchen
exhaust hoods should be performed after make-up air
flows are balanced and with the kitchen entrance
doors both opened and closed.
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Step by step procedures for each measurement required during TAB Execution
shall be provided. The procedures shall be oriented such that there is a
separate section for each system. The procedures shall include measures to
ensure that each system performs as specified in all operating modes,
interactions with other components (such as exhaust fans, kitchen hoods,
fume hoods, relief vents, etc.) and systems, and with all seasonal
operating differences, diversity, simulated loads, and pressure
relationships required.
3.5.2
Systems Readiness Check
The TAB Specialist shall inspect each system to ensure that it is complete,
including installation and operation of controls, and that all aspects of
the facility that have any bearing on the HVAC systems, including
installation of ceilings, walls, windows, doors, and partitions, are
complete to the extent that TAB results will not be affected by any detail
or touch-up work remaining. The TAB Specialist shall also verify that all
items such as ductwork and piping ports, terminals, connections, etc.,
necessary to perform TAB shall be complete during the Systems Readiness
Check.
3.5.3
Preparation of TAB Report
Preparation of the TAB Report shall begin only when the Systems Readiness
Report has been approved. The Report shall be oriented so that there is a
separate section for each system. The Report shall include a copy of the
appropriate approved Schematic Drawings and TAB Related Submittals, such as
pump curves, fan curves, etc., along with the completed report forms for
each system. The operating points measured during successful TAB Execution
and the theoretical operating points listed in the approved submittals
shall be marked on the performance curves and tables. Where possible,
adjustments shall be made using an "industry standard" technique which
would result in the greatest energy savings, such as adjusting the speed of
a fan instead of throttling the flow. Any deficiencies outside of the
realm of normal adjustments and balancing during TAB Execution shall be
noted along with a description of corrective action performed to bring the
measurement into the specified range. If, for any reason, the TAB
SECTION 15990A
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