self-contained heater banks such as under-car heater sections,
outside the rail heater sections, lower side car heater sections
and vertical side car heater sections, with reflectors, hinged
cover, waterproof and weatherproof wired terminal blocks and zone
controls for flexibility of operation.]
c.
Burner Controls (for Gas Fired Units): Burners shall be
electrically ignited with controls meeting Industrial Risk
Insurers' requirements. Provide a gas pressure regulator for
serving not more than eight individual burners. Regulator shall
reduce gas pressure in supply line to pressure required for
burners. Provide each burner with an air regulating valve for
fuel-air ratio adjustment. Regulating valve shall contain
positive vibration-proof locking device for maintaining critical
adjustment.
d.
Control Panel: Provide centrally located control panel with panel
front having a graphic display of the thawing system. Display
shall be approximately to scale and coordinated with control and
light indication for combustion air blowers and on-off control of
individual heaters. Provide a modulating control for each heater
to regulate heat output to suit the operating requirements. Panel
shall be NEMA [12] [3R-8], dust-tight enclosure with internal
equipment and wiring accessible from the panel front. Provide
nameplates on panel front to designate function of switches and
indicating lights. Controls shall be suitable for [_____] volt,
[_____] phase, 60 Hz operation. Provide and mark terminals for
connections, with the exception of the neutral. Terminal blocks
shall be 600 volt rated. Control relays shall have convertible
contacts and shall have rating suitable for intended service but
not less than 10 amp, 600 volt rating. Components shall be an
industrial design of the oiltight type. Connections to the panel
shall be watertight. Motor starters for combustion air blowers
shall be installed in each respective blower cabinet.
]2.9.1.3
Shed
**************************************************************************
NOTE: Shed should be used in the severe climate
areas.
**************************************************************************
Provide shed of pre-engineered metal space frame construction with
corrugated siding as indicated. Provide ventilation with roof vents and
openings along bottom of sides.
2.9.2
Top-Mounted Railroad Hopper Car Shaker (Unloader)
**************************************************************************
NOTE: If noise is a major factor of concern, design
a shaker enclosure with acoustical treatment which
will be capable of reducing the noise to a tolerable
level.
**************************************************************************
Provide top-mounted rail car shaker complete with shaker, frame, vibrator,
motors, hoists, hoist frame, [enclosure], and controls. Design unit for
operation under all weather conditions.
SECTION 15501N
Page 70
Previous Page
