ADDENDUM NO. 2 CITY OF SAN ANTONIO CAPITAL ...

HVAC Upgrades – International Center AAI #12-154
of factory mounted controls the manufacturer doing the mounting shall provide control
transformers and coordinate the voltages. Indicate location of all control panels requiring
power on submittal shop drawings for coordination with Electrical Contractor during preinstallation
meeting described in section 1.6 above.
D. Control valves and separable wells for immersion elements and couplings for flow and
pressure switches furnished under this section shall be installed by the Mechanical
Contractor.
E. All automatic dampers furnished under this section shall be installed by the Mechanical
Contractor. It shall be the responsibility of the Mechanical Contractor to provide and install
blank off plates when the control application requires dampers smaller than duct size.
F. All finished painting required for Control piping and equipment shall be done by the General
Contractor.
G. All cutting and patching necessary for the installation of the Control System shall be done by
the General Contractor.
H. All sealing of any penetration of the under floor supply air plenum shall be accomplished by
the trade making the penetration.
I. Enclosures: Equipment room controllers or relay packs shall not be installed in the room’s
ceiling. If the equipmentis in a mechanical room, electrical room, chiller room or other
dedicated room the associated controller and relays shall be mounted in a NEMA-1 fabricated
and hinged metal enclosure with lock within sight of the equipment it controls. Fabricated
panel means built in a shop environment with templates and not constructed on site.
Extensions to controllers for additional controlled or monitored items for a given area shall be
mounted adjacent to the equipment controls.
J. Space Local Indication: Each IDS (Indicating Digital Space) sensor, where specified, shall
display digital readouts of temperature and temperature setpoint. The Operator shall be able
to delete these readouts from the Central Workstation on an individual IDS basis as desired.
K. Local Override Buttons: Shall be integral to the sensor and installed in all areas except
common areas such as lobbies, bathrooms, hallways, etc. Equipment room sensors shall not
be equipped with override buttons.
L. Space Temperature Sensor Local Adjustment: Areas specified to have adjustment shall have
a temperature setpoint adjustment that can be limited in software to plus or minus 2 Deg F
adjustment range from setpoint.
M. Duct Smoke Detectors: Shall be provided, installed and wired for fan shutdown by Division
26 contractor. The Building Automation System or controller shall not be used in the life
safety control or shutdown of the building in any way. A duct smoke detector is to be
mounted at the return air of each air handler unit, over 2,000 CFM which will stop the unit
upon a detection of smoke.
N. Smoke and Fire Dampers: Shall be provided and installed by the Mechanical Contractor with
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