with a pressure correcting device that will correct flow readings to
atmospheric pressure. Body shall be aluminum. Minimum meter design
pressure shall be 690 kPa 100 psig. Accuracy shall be plus or minus 1
percent of calibrated span minimum. Turndown shall be [_____].
Connections shall be threaded for sizes 38 mm 1-1/2 inches and smaller.
Connections shall be flanged for sizes 50 mm 2 inches and larger.
2.1.22.2
Water Flow
Water flow meter shall be disk type with reinforced disk for hot water
above 65 degrees C, 150 degrees F, and rubber or carbon disk for cold
water, and constructed of bronze composition and cast iron protected by
noncorrosive coating. Moving parts subject to wear shall be easily
replaceable. Waterflow meters shall conform to the requirements of AWWA
C700.
2.1.22.3
Fuel Oil Flow
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NOTE: Ensure the turndown ratio (TDR) of the oil
flow meter is wider than that of the boiler burner
TDR firing on fuel oil.
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Fuel oil flow meter shall be nutating disc, positive displacement with
direct mechanical shaft drive from meter to register. Construction
materials shall be cast iron housing, bronze internals, aluminum ball and
web disc, and Type 316 stainless steel diaphragm. Register shall be
totalizing and shall be as specified. Flow oil meter shall be suitable for
maximum oil temperature.
2.1.23
Natural Gas Pressure Regulator
Natural gas pressure regulator shall be pilot operated type. Diaphragms
shall be nitrile. Natural gas pressure regulator valve body shall be
steel. Minimum pressure rating shall be 1.03 MPa 150 psig. Vent
connection shall be in accordance with NFPA. Natural gas pressure
regulator shall be provided with an external position indicator.
2.1.24
Fractional and Integral Horsepower Motors
NEMA MG 1.
2.2
ELECTRICAL WORK
Electric motor driven equipment specified shall be provided complete with
motor, motor starter, and controls. Electrical equipment and wiring shall
be in accordance with Section 16402 INTERIOR DISTRIBUTION SYSTEM.
Electrical characteristics shall be as specified or indicated. Motor
starters shall be provided complete with thermal overload protection and
other appurtenances necessary for the motor control specified. Unless
otherwise indicated, motors 746 w 1 hp and above shall be high efficiency
type. Motor shall be of sufficient size to drive the equipment at the
specified capacity without exceeding the nameplate rating of the motor.
Manual or automatic control and protective or signal devices required for
the operation specified, and control wiring required for controls and
devices specified, shall be provided.
SECTION 15561A
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