Specifications - Lord and Son Construction, Inc.

for multi-section dampers. Acceptable methods include but are not limited
to U-channel, angle iron, corner angles and bolts, bent galvanized steel
stiffeners, sleeve attachments, braces, and building structure. Where
multi-section dampers are installed in ducts or sleeves, they shall not sag
due to lack of support. Jackshafts shall not be used to link more than
three damper sections. Blade to blade linkages shall not be used. Outside
and return air dampers shall be installed such that their blades direct
their respective air streams towards each other to provide for maximum
mixing of air streams.
3.2.15 Valves
3.2.15.1 Ball Valves
Two-position (open/closed) ball valves may only be used on chilled water,
condenser water, hot water, or steam applications. Modulating ball valves
may only be used for chilled water and condenser water applications
(modulating ball valves shall not be used on steam or hot water
applications). In modulating applications a characterizing equal-percentage
disc shall be used.
3.2.15.2 Butterfly Valves
In two-way control applications, valve travel shall be limited to 70% (60
degrees) open position.
3.2.16 Local Gauges for Actuators
Pneumatic actuators shall have an accessible and visible pressure gauge
installed in the tubing lines at the actuator as shown.
3.2.17 Wire and Cable
Wire and Cable shall be installed without splices between control devices and
in accordance with NFPA 70 and NFPA 90A. Instrumentation grounding shall be
installed per the device manufacturer's instructions and as necessary to
prevent ground loops, noise, and surges from adversely affecting operation of
the system. Ground rods installed by the Contractor shall be tested as
specified in IEEE Std 142. Cables and conductor wires shall be tagged at
both ends, with the identifier shown on the shop drawings. Electrical work
shall be as specified in Section 26 20 00 INTERIOR DISTRIBUTION SYSTEM and as
shown. Wiring external to enclosures shall be run in raceways
3.2.18 Copper Tubing
Copper tubing shall be hard-drawn in exposed areas and either hard-drawn or
annealed in concealed areas. Only tool-made bends shall be used. Fittings
for copper tubing shall be brass or copper solder joint type except at
connections to apparatus, where fittings shall be brass compression type.
3.2.19 Plastic Tubing
Plastic tubing shall be run within covered raceways or conduit except when
otherwise specified. Plastic tubing shall not be used for applications
where the tubing could be subjected to a temperature exceeding 130 degrees
F. Fittings for plastic tubing shall be for instrument service and shall be
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