c.
Meters: Designed for a full scale pressure differential of 12 kPa
50 inches water gage for tubular type or 25 kPa 100 inches water
gage for orifice type. Dials shall have square root or linear
scales with developed length of not less than 305 mm 12 inches.
Provide flush mounted panel meters that read directly in liters
per second gallons per minute. Dials of portable meters shall
have square root scales reading from 0 to 6 L/s 0 to 100 gpm for
use with multiplier stamped on orifice or tubular type. Provide
meters designed for not less than 1378 kPa 200 psi and protected
against pressure surges. Meter bodies shall have taps for venting
and draining.
(1) Permanently Mounted Meters: Each meter shall be connected
completely [as indicated] [and] [as specified] and provided with
the following: three valve manifold equalizer lines, two block
valves, two vent and drain valves, and an integral pulsation
damper. Overall accuracy of meters shall be plus or minus 2
percent of full scale flow over a range from 20 to 100 percent of
full scale flow.
(2) Portable Meters: Provide meter with a factory-fabricated
carrying case with carrying handle. Provide case fitted to hold
meter securely and to accommodate the following accessories:
(a) Two 4.60 meters 15 foot lengths of connecting hose with
suitable female connectors for connecting from meter to [venturi
tube] [orifice flange] [pitot tube] pressure-tap nipples. Provide
hose designed for a minimum service pressure of 861 kPa 125 psi or
150 percent of maximum system service pressure, whichever is
greater.
(b) A completely assembled three-valve manifold with two block
valves and vent and drain valves, piped and mounted on a base
designed for use laying flat on a stationary surface.
(c) A bound set of descriptive bulletins, installation and
operating instructions, parts list, and a set of curves showing
flow versus pressure differential for each orifice, venturi tube,
or pitot tube with which meter is to be used.
(d) A metal instruction plate, secured inside cover, illustrating
use of meter.
(e) Provide meters with overall accuracy of plus or minus 5
percent of full scale flow over a range from 20 to 100 percent of
full scale flow.
2.4
TERMINAL UNITS
2.4.1
Finned Tube Radiators
[Steel tube and steel fin type FS S-R-2834]. [Copper tube and aluminum fin
type FS A-A-50545, [shall have an adjustable damper].]
2.4.2
Convectors
FS A-A-50543 and FS A-A-50544, of design and capacity not less than that
indicated.
SECTION 15185N
Page 23
Previous Page
