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This specification section is structured as though the HVAC construction,
and thereby the TAB work, is going to be completed in a single phase[ in
spite of the fact that there will be two seasons]. All elements of the TAB
work are addressed on this premise. When a contract is to be completed in
construction phases, including the TAB work, [and the DALT work, ]the TAB
work[and DALT work] shall be planned for, completed and approved by the
Contracting Officer with each phase. An example of this case would be one
contract that requires the rehabilitation of the HVAC in each of several
separated buildings. At the completion of the final phase, all approved
reports shall be compiled and submitted as one document.
]1.5
DEFINITIONS
[a.
DALT:
Duct air leakage test
b.
DALT'd:
Duct air leakage tested]
c.
Sound measurements terminology:
Defined in AABC MN-1 or NEBB MASV.
d.
TAB team supervisor:
TAB team engineer.
e.
TAB team technician:
TAB team assistant.
f.
TAB'd:
HVAC Testing/Adjusting/Balancing procedures performed.
g.
Field check group: One or more systems of the same basic type;
the subgroup of a "field check group" is a "system". An example
of a "system" is a supply air handler with its duct system, which
is its supply, return, and outside air ducts.
h.
Out-of-tolerance data: Pertains only to field checking of
[Certified Final DALT ]or Certified TAB report. [When applied to
DALT work, this phase means "a leakage rate measured during DALT
field checking which exceeds the leakage rate allowed by SMACNA
Leak Test Manual for an indicated duct construction and sealant
class."] When applied to TAB work this phase means "a measurement
taken during TAB field checking which does not fall within the
range of plus 5 to minus 5 percent of the original measurement
reported on the certified TAB Report for a specific parameter."
i.
Season of maximum heating load: Time of year when outdoor ambient
temperature at equipment installation site remains within
following range throughout the period of data recording for TAB
work. Indicated winter outdoor design dry bulb temperature plus
17.5 to minus 17.5 degrees Celsius plus 30 to minus 30 degrees
Fahrenheit.
j.
Season of maximum cooling load: Time of year when outdoor ambient
temperature at equipment installation site remains within
following range throughout the period of data recording for TAB
work. Indicated summer outdoor design dry bulb temperature plus
8, minus 3 degrees Celsius plus 15, minus 5 degrees Fahrenheit.
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NOTE: In the case where the winter outdoor design
dry bulb temperature and the summer outdoor design
dry bulb temperature are within 19.4 degrees C 35
SECTION 15950N
Page 7
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