2.5.11
Fuel Flow Meter
The meter shall be of the volumetric measurement type incorporating a
rotary, positive displacement piston body with gear train driven generator
and totalizing register, a panel-mounting meter to indicate fuel oil rate
of flow in gallons per minute, and a transmitter output signal of 4 to 20
mA dc to be used for combustion control. The meter body shall be bronze
with hard-cast bronze measuring piston. The generator shall be totally
enclosed with grease-packed ball bearings, silver commutator, and brushes.
The totalizing register shall be mounted on top of the generator housing
and shall be calibrated in liters U.S. gallons.
2.5.12
Water Flow Meter
Water flow recorder with totalizer shall be provided for each generator.
Recorder shall otherwise conform to the requirements specified for the HTW
temperature recorder except that flow rates will be recorded in L/sec gpm.
2.5.13
Btu Recorder
Each HTW generator shall be provided with a recording totalizer which shall
integrate temperature difference and water flow to provide the net J Btu
output of the generator.
2.5.14
Makeup Water Meter
A makeup water meter shall be provided in the treated water line. The
meter shall be of the positive displacement type and shall be suitable for
operation with water at 21 degrees C 70 degrees F and 450 kPa 65 psig. The
complete meter assembly shall include meter isolation valves and a valved
bypass and strainer on the inlet side of the meter. The dial shall be
254.0 mm 10 inch diameter vertical type calibrated in L gallons and having
two hands; 380 L 100 gallons indicated on one hand and 7570 L 2000 gallons
on the other hand. The hands shall have a manual reset device. A
totalizing register shall be provided. All bearings shall be
self-lubricating if submerged. The meter capacity shall be [_____] L/sec
gpm.
2.5.15
Master Control Center
A centrally located master control center shall be provided to serve as the
central control and recording station for the plant. The master control
panel shall serve as a central point for miscellaneous functions including
the various alarm circuits with their annunciators and audible signals, and
the controls for the system. The units to be installed on the panel are
specified under the various paragraphs of this specification. All
necessary electric wiring for instruments, panel lighting, and equipment
requiring electrical connections shall be installed. All necessary
transformers, separate relays, switches, and fuses shall be installed in a
fully enclosed junction box. A safety switch with fuses shall serve the
120-volt power supply to the plug-in strip and any other power supply as
required for control circuits. All wire shall be suitable for boiler room
requirements and installed according to NFPA 70. All necessary
interconnecting piping, terminal block, valves, and fittings required for
the control equipment shall be installed and supported in place on the rear
of the panel and tested at the factory.
SECTION 15555A
Page 44
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