regulator and safety valve shall be provided downstream of the
filter.
c.
Flexible pipe connectors shall be designed for 1034 kPa (gage) and
121 degrees C 150 psi and 250 degrees F service, and shall be
constructed of rubber, tetrafluoroethylene resin, or braided
corrosion-resistant steel, bronze, monel, or galvanized steel.
Connectors shall be suitable for service intended and may have
threaded or soldered ends. Length of connectors shall be as
recommended by the manufacturer for service intended.
d.
Vibration isolation units shall be standard products with
published loading ratings, and shall be single rubber-in-shear,
double rubber-in-shear, or spring type.
2.17
ELECTRONIC VARIABLE AIR VOLUME VAV TERMINAL UNIT CONTROLS
Provide electronic VAV terminal unit controls.
2.17.1
VAV Terminal Units
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NOTE: For LANTNAVFACENGCOM projects, use
LANTNAVFACENGCOM regional Section 15700, "Heating,
Ventilating and Cooling System."
**************************************************************************
VAV terminal units shall be as specified in Section 15720N AIR HANDLING
UNITS.
2.17.2
Terminal Unit Controls
a.
UL 916 and FCC Part 15. Controls for pressure independent boxes
shall consist of a velocity sensing device in the primary air
entering box, a room temperature sensing element, a damper
actuator, and an adjustable microprocessor-based VAV box
controller. Controls shall operate a damper for cooling [and a
duct coil for heating]. Actuator shall open or close the device
to which it is applied within 6 minutes.
b.
Controls for pressure independent boxes with recirculating fans
shall consist of a velocity sensing device in the primary air
entering the box, a room temperature sensing element, an
adjustable microprocessor-based VAV box controller, a damper with
actuator, and a duct pressure switch to operate the recirculation
fan.
Controller shall operate the damper for cooling and the
recirculating fan [and duct coil] for heating.
c.
One hand-held communication and programming device with an
instruction manual, plus one additional hand-held communication
device and instruction manual per 100 terminal units, shall be
provided. Communication and programming device shall connect
directly to the controller or to a jack at the room temperature
sensing element location. Communication and programming device
shall be used to read and set minimum velocity, maximum velocity,
heating setpoint, and cooling setpoint, and to read air velocity
and space temperature.
SECTION 15901N
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