SECTION 23 00 00
MODEL 380
Impeller Flow Sensor and Energy Meter, Liquid, Single-Channel
PART 1 - GENERAL
1.1
1.2
SCOPE
A.
This section describes the requirements for an energy and flow measurement network
transmitter with integral hydronic energy meter.
B.
Under this item, the contractor shall furnish and install the flow measurement
equipment and accessories as indicated on the plans and as herein specified.
QUALITY ASSURANCE
A.
Referenced Standards and Guidelines
1.
International Electrotechnical Commission
a.
2.
IEC 751 Class B
Telecommunications Industry Association/Electronic Industries Alliance
a.
1.3
RS-485
SUBMITTALS
A.
The following information shall be included in the submittal for this section:
1.
Customer connection and power wiring diagrams
2.
Data sheets and catalog literature for microprocessor-based transmitter and
integral hydronic energy calculators & flow sensor
3.
Interconnection drawings
4.
Installation and operations manual
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1.4
List of spare parts
6.
Complete technical product description including a complete list of options
provided
7.
Any portions of this specification not met must be clearly indicated or the
supplier and contractor shall be liable to provide all additional components
required to meet this specification
SYSTEM DESCRIPTION
A.
1.5
5.
Energy measurement system is suitable for metering cold or hot systems. Integral
flow sensor, energy calculator and temperature sensors compute energy using flow
and temperature differential. BTU system incorporates impeller flow sensor and two
temperature probes. One temperature probe is mounted directly in the flow sensor
tee, the second temperature probe is installed either the supply or the return line
depending on application.
DEFINITIONS
A.
BTU – (British Thermal Unit) A traditional unit of energy equal to about 1,055 joules
or the amount of energy required to change the temperature of one pound of water by
one degree Fahrenheit. “BTU meter” is an alternate name for a hydronic energy
meter or heat meter.
B.
Hydronic – Denoting a cooling or heating system in which heat is transported using
circulating water.
C.
Impeller – The rotating element exposed to the moving fluid in the conduit. The
rotations of the impeller are detected by a sensing mechanism and correlated to flow
rate.
D.
NEMA – (National Electrical Manufacturers Association) Association of companies
which provides a forum for the development of technical standards that are in the best
interests of the industry and users, advocacy of industry policies on legislative and
regulatory matters, and collection, analysis, and dissemination of industry data.
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E.
NPT – (National Pipe Thread) A U.S. standard for tapered threads used on threaded
pipes and fittings. In contrast to straight threads that are found on a bolt, a taper
thread will pull tight and therefore make a fluid-tight seal.
F.
RTDs – (Resistance Temperature Detectors) These are sensors used to measure
temperature by correlating the resistance of the RTD element with temperature.
PART 2 – PRODUCTS
2.1
APPROVED MANUFACTURERS
A.
Basis-of-Design Product: Subject to compliance with specifications, provide flow
and/or thermal energy meters by one of the following:
1.
2.2
Data Industrial by Badger Meter
OPERATING CONDITIONS
A.
System Components
1.
2.
Integral Hydronic Energy Calculators, Flow Sensor, & Temperature Sensors
a.
Consists of a casting which houses the flow sensor mechanism, a
calculator which integrates the flow and temperature data to compute
flow/energy rate and total.
b.
Temperature probes used to measure temperature by correlating the
resistance of the RTD element with temperature. Set consists of one to
measure liquid in the inlet pipe, and one to measure the liquid in the outlet
pipe.
Standard 5-pin Mini USB Cable
a.
3.
Cable required to connect flow sensor system to PC for use of
commissioning software.
120 VAC/12V DC Power Supply
a.
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Supplies power to the system.
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B.
Operational Requirements
1.
Impeller BTU System
a.
The energy measurement system shall be a microprocessor based digital
unit, capable of calculating and outputting energy information. Energy
information shall be either a scaled pulse output representing energy total
or RS-485output providing complete information (standard feature). The
RS-485 shall communicate using either BACnet, MSTP or Modbus RTU.
b.
Certifications
1)
2)
RTD meets IEC751 Class B
Electrical Inputs meet RS-485
c.
Complete information from RS485 output shall include energy rate,
energy total, temperature one, temperature two, temperature differential,
temperature mode, flow filter coefficient, temperature filter coefficient,
specific heat coefficient, and fluid density coefficient.
d.
Engineering Units:
e.
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1)
Volumetric Flow: gpm, gph, lpm, lps, lph, ft³/s, ft³/m, ft³/h, m³/s,
m³/min, m³/h, custom
2)
Energy Flow: kBtu/min, kBtu/h, kW, MW, HP, Tons, custom
3)
Total Volume: gallons, galx100, galx1000, liters, ft³, m³, custom
4)
Total Energy: Btu, kBtu, MBtu, kWh, MWh, kJ, MJ, custom
5)
Temp In/Out: °C, °F
6)
Density: lb/gallon
7)
Specific Heat Capacity: Btu/lb-F
Energy Meter with Integral Flow Sensor
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1)
Primary Sensor: Grade 316 stainless steel, non-magnetic impeller
design.
i.
The system shall operate with pipe size ranges 0.75 to 2''
[19.05 to 50.8 mm].
ii.
Tee shall be constructed from cast bronze.
iii.
Type of process connection shall be NPT.
NOTE TO SPECIFIER: Select the appropriate sensor version: 380HS (Hot) or 380CS (Chilled)
iv.
iv.
Hot liquid sensor shall have continuous operating temperature
of 40° to 260°F [4° to 125°C].
Chilled liquid sensor shall have continuous operating
temperature of -4° to 140°F [-20° to 60°C].
f.
Temperature Sensors
1)
g.
One temperature probe shall be mounted directly in the flow sensor
tee; the second shall be placed on either the supply or the return line
depending on the application.
Internal Electronics
1)
Enclosure shall be NEMA 4X [IP 65]. Sensor housing shall be
constructed of PEEK.
2)
AC power consumption shall be 12-28 VA and DC power
consumption shall be 12-35 VA.
3)
Peak current consumption shall be 60mA.
4)
Ambient temperature shall be -4° to 149° F [-20° to 65° C]
5)
Outputs:
i.
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Scaled pulse output. Solid state switch. Maximum frequency of
scaled pulse varies based upon pulse width selected. Pulse
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width available is 10, 50, 150, 200, 250, and 500mS. Resulting
frequency range is 0.01 Hz min. to 100 Hz max.
ii.
6)
Industrial Communications (native):
i.
ii.
7)
i.
All parameters and commands shall be entered via USB to mini
USB and software programming utility.
System Performance
1)
Standard flow measurement range shall be 0.6-6 MPS [1.97 to 19.69
FPS]
2)
Low flow measurement range shall be 0.09-2.5 MPS [.295 to 8.2
FPS]
3)
Accuracy shall be ±2% of full scale
4)
Repeatability shall be ±0.5% of full scale
5)
Types of Liquids: Suitable for clean, homogenous, lower-viscosity
liquids
PC Commissioning Software
1)
C.
BACnet on MS/TP
Modbus RTU
Control and Programming
i.
h.
Signal can travel up to 2000' (610 m) between flow sensor and
connected device depending on cable.
A software utility can be utilized to configure the BTU meter. The
software shall be compatible with Windows 95, Windows 98,
Windows 2000, Windows 2000, Windows XP, and Windows Vista®
operating systems.
Integrations
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1.
2.
3.
Remote Display Option
A304-1M Programming Kit
Model 34W5T (To connect to Modbus RTU output)
PART 3 - EXECUTION
3.1
3.2
INSTALLATION
A.
Follow manufacturer’s recommendation for installation.
B.
Straight pipe requirement shall be 10 diameters upstream and 5 diameters
downstream. Pipe bends, valves, other fittings, pipe enlargements and reductions
should not be present in this length of pipe.
C.
Apply pipe compound over the first 3 or 4 threads of the mating pipe.
D.
Thread the pipe into the sensor tee until hand tight, and then tighten the pipe an
additional 1-1/2 turns, using a wrench.
E.
System requires isolated 12-24 V AC/DC power supply. To avoid ground fault
conditions, power should not be shared with other devices.
F.
The RS-485 requires three connections: RS-485+, RS-485- and REF. RS-485 is a
high-speed connection and should be wired to meet TIA-EIA-485-A standards.
G.
The pulse output is a simple solid state switch. The switch is not polarity sensitive,
however, the maximum voltage and current ratings should not be exceeded.
CALIBRATION
A.
3.3
Impeller flow meters are individually wet tested in factory.
MANUFACTURER’S WARRANTY
A.
Terms
1.
The manufacturer of the above specified equipment shall guarantee for twelve
(12) months from date of installation; or one (1) year and six (6) months after
the date of shipment that the equipment shall be free from defects in design,
workmanship or materials.
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END OF SECTION
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