230519 SF - METERS AND GAGES FOR HVAC PIPING.DOC

UNIT TRAININGEQUIPMENT SITE ADD/ALT

Copyright 2009 by The American Institute of Architects (AIA)

Exclusively published and distributed by Architectural Computer Services, Inc. (ARCOM) for the AIA

SECTION 230519 - METERS AND GAGES FOR HVAC PIPING

Revise this Section by deleting and inserting text to meet Project-specific requirements.

Verify that Section titles referenced in this Section are correct for this Project's Specifications; Section titles may have changed.

PART 1 - GENERAL

1.1 SUMMARY

A. Section Includes:

1. Bimetallic-actuated thermometers.

2. Thermowells.

3. Dial-type pressure gages.

4. Gage attachments.

5. Pitot-tube flowmeters.

1.2 ACTION SUBMITTALS

A. Product Data: For each type of product indicated.

B. Wiring Diagrams: For power, signal, and control wiring.

1.3 INFORMATIONAL SUBMITTALS

A. Product certificates.

1.4 CLOSEOUT SUBMITTALS

A. Operation and maintenance data.

PART 2 - PRODUCTS

2.1 BIMETALLIC-ACTUATED THERMOMETERS

See Editing Instruction No. 1 in the Evaluations for cautions about naming manufacturers. Retain one of first two paragraphs and list of manufacturers below. See Division 01 Section "Product Requirements."

A. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

1. Ashcroft Inc.

2. Watts Regulator Co.; a div. of Watts Water Technologies, Inc.

3. Weiss Instruments, Inc.

B. Standard: ASME B40.200.

Case in first paragraph below will typically be the sealed (dry) type. Hermetically sealed cases are available.

C. Case: Sealed type; stainless steel with 3-inch nominal diameter.

D. Dial: Nonreflective aluminum with permanently etched scale markings and scales in deg F.

E. Connector Type(s): Union joint, adjustable angle, with unified-inch screw threads.

F. Connector Size: 1/2 inch, with ASME B1.1 screw threads.

G. Stem: 0.25 or 0.375 inch in diameter; stainless steel.

H. Window: Plain glass or plastic.

I. Ring: Stainless steel.

J. Element: Bimetal coil.

K. Pointer: Dark-colored metal.

L. Accuracy: Plus or minus 1 percent of scale range.

2.2 LIQUID-IN-GLASS THERMOMETERS

A. Metal-Case, Industrial-Style, Liquid-in-Glass Thermometers:

See Editing Instruction No. 1 in the Evaluations for cautions about naming manufacturers. Retain one of first two subparagraphs and list of manufacturers below. See Division 01 Section "Product Requirements."

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

a. Flo Fab Inc.

b. Palmer Wahl Instrumentation Group.

c. Weiss Instruments, Inc.

2. Standard: ASME B40.200.

3. Case: Cast aluminum; 7-inch nominal size unless otherwise indicated.

4. Case Form: Adjustable angle unless otherwise indicated.

5. Tube: Glass with magnifying lens and blue or red organic liquid.

6. Tube Background: Nonreflective aluminum with permanently etched scale markings graduated in deg F.

7. Window: Glass or plastic.

8. Stem: Aluminum and of length to suit installation.

a. Design for Air-Duct Installation: With ventilated shroud.

b. Design for Thermowell Installation: Bare stem.

9. Connector: 1-1/4 inches, with ASME B1.1 screw threads.

10. Accuracy: Plus or minus 1 percent of scale range or one scale division, to a maximum of 1.5 percent of scale range.

B. Plastic-Case, Industrial-Style, Liquid-in-Glass Thermometers:

See Editing Instruction No. 1 in the Evaluations for cautions about naming manufacturers. Retain one of first two subparagraphs and list of manufacturers below. See Division 01 Section "Product Requirements."

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

a. Palmer Wahl Instrumentation Group.

b. Watts Regulator Co.; a div. of Watts Water Technologies, Inc.

c. Weiss Instruments, Inc.

2. Standard: ASME B40.200.

3. Case: Plastic; 7-inch nominal size unless otherwise indicated.

4. Case Form: Adjustable angle unless otherwise indicated.

5. Tube: Glass with magnifying lens and blue or red organic liquid.

6. Tube Background: Nonreflective aluminum with permanently etched scale markings graduated in deg F.

7. Window: Glass or plastic.

8. Stem: Aluminum and of length to suit installation.

a. Design for Air-Duct Installation: With ventilated shroud.

b. Design for Thermowell Installation: Bare stem.

9. Connector: 1-1/4 inches, with ASME B1.1 screw threads.

10. Accuracy: Plus or minus 1 percent of scale range or one scale division, to a maximum of 1.5 percent of scale range.

2.3 DUCT-THERMOMETER MOUNTING BRACKETS

A. Description: Flanged bracket with screw holes, for attachment to air duct and made to hold thermometer stem.

2.4 THERMOWELLS

ASME B40.200 uses the following symbols for thermowell materials: "CNR" for copper nickel (90-10), "CUNI" for copper nickel (70-30), "CRES" for corrosion-resistant steel, "NICU" for nickel copper, "ALBR" for aluminum bronze, and "CSA" for steel. Other materials are allowed.

A. Thermowells:

1. Standard: ASME B40.200.

2. Description: Pressure-tight, socket-type fitting made for insertion into piping tee fitting.

3. Material for Use with Copper Tubing: CNR or CUNI.

4. Material for Use with Steel Piping: CRES.

5. Type: Stepped shank unless straight or tapered shank is indicated.

6. External Threads: NPS 1/2, NPS 3/4, or NPS 1, ASME B1.20.1 pipe threads.

7. Internal Threads: 1/2, 3/4, and 1 inch, with ASME B1.1 screw threads.

8. Bore: Diameter required to match thermometer bulb or stem.

9. Insertion Length: Length required to match thermometer bulb or stem.

10. Lagging Extension: Include on thermowells for insulated piping and tubing.

11. Bushings: For converting size of thermowell's internal screw thread to size of thermometer connection.

B. Heat-Transfer Medium: Mixture of graphite and glycerin.

2.5 PRESSURE GAGES

A. Direct-Mounted, Metal-Case, Dial-Type Pressure Gages:

See Editing Instruction No. 1 in the Evaluations for cautions about naming manufacturers. Retain one of first two subparagraphs and list of manufacturers below. See Division 01 Section "Product Requirements."

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

a. AMETEK, Inc.; U.S. Gauge.

b. Watts Regulator Co.; a div. of Watts Water Technologies, Inc.

c. Weiss Instruments, Inc.

2. Standard: ASME B40.100.

3. Case: Sealed type; cast aluminum or drawn steel; 4-1/2-inch nominal diameter.

4. Pressure-Element Assembly: Bourdon tube unless otherwise indicated.

Match pressure connection size in first subparagraph below with gage attachment size.

5. Pressure Connection: Brass, with NPS 1/4, ASME B1.20.1 pipe threads and bottom-outlet type unless back-outlet type is indicated.

6. Movement: Mechanical, with link to pressure element and connection to pointer.

7. Dial: Nonreflective aluminum with permanently etched scale markings graduated in psi.

8. Pointer: Dark-colored metal.

9. Window: Glass or plastic.

10. Ring: Metal.

11. Accuracy: Grade A, plus or minus 1 percent of middle half of scale range.

B. Direct-Mounted, Plastic-Case, Dial-Type Pressure Gages:

See Editing Instruction No. 1 in the Evaluations for cautions about naming manufacturers. Retain one of first two subparagraphs and list of manufacturers below. See Division 01 Section "Product Requirements."

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

a. AMETEK, Inc.; U.S. Gauge.

b. Tel-Tru Manufacturing Company.

c. Weiss Instruments, Inc.

2. Standard: ASME B40.100.

3. Case: Sealed type; plastic; 4-1/2-inch nominal diameter.

4. Pressure-Element Assembly: Bourdon tube unless otherwise indicated.

Match pressure connection size in first subparagraph below with gage attachment size.

5. Pressure Connection: Brass, with NPS 1/4, ASME B1.20.1 pipe threads and bottom-outlet type unless back-outlet type is indicated.

6. Movement: Mechanical, with link to pressure element and connection to pointer.

7. Dial: Nonreflective aluminum with permanently etched scale markings graduated in psi.

8. Pointer: Dark-colored metal.

9. Window: Glass or plastic.

10. Accuracy: Grade A, plus or minus 1 percent of middle half of scale range.

Match pressure connection size in first subparagraph below with gage attachment size.

2.6 GAGE ATTACHMENTS

Match attachment size in three paragraphs below with pressure-gage-connection size.

A. Snubbers: ASME B40.100, brass; with NPS 1/4, ASME B1.20.1 pipe threads and piston-type surge-dampening device. Include extension for use on insulated piping.

B. Siphons: Loop-shaped section of brass pipe with NPS 1/4 pipe threads.

C. Valves: Brass ball, with NPS 1/4, ASME B1.20.1 pipe threads.

2.7 FLOWMETERS

Indicate flowmeter capacity and operating conditions on Drawings.

A. Pitot-Tube Flowmeters:

See Editing Instruction No. 1 in the Evaluations for cautions about naming manufacturers. Retain one of first two subparagraphs and list of manufacturers below. See Division 01 Section "Product Requirements."

1. Manufacturers: Subject to compliance with requirements, available manufacturers offering products that may be incorporated into the Work include, but are not limited to, the following:

a. ABB; Instrumentation and Analytical.

b. Meriam Process Technologies.

c. TACO Incorporated.

2. Description: Flowmeter with sensor and indicator.

3. Flow Range: Sensor and indicator shall cover operating range of equipment or system served.

4. Sensor: Insertion type; for inserting probe into piping and measuring flow directly in gallons per minute.

a. Design: Differential-pressure-type measurement for oil.

b. Construction: Stainless-steel probe of length to span inside of pipe, with integral transmitter and direct-reading scale.

c. Minimum Pressure Rating: 150 psig.

d. Minimum Temperature Rating: 250 deg F.

5. Indicator: Hand-held meter; either an integral part of sensor or a separate meter.

6. Integral Transformer: For low-voltage power connection.

7. Accuracy: Plus or minus 3 percent.

8. Display: Shows rate of flow, with register to indicate total volume in gallons.

9. Operating Instructions: Include complete instructions with each flowmeter.

See Editing Instruction No. 1 in the Evaluations for cautions about naming manufacturers. Retain one of first two subparagraphs and list of manufacturers below. See Division 01 Section "Product Requirements."

PART 3 - EXECUTION

3.1 INSTALLATION

A. Install thermowells with socket extending to center of pipe and in vertical position in piping tees.

B. Install thermowells of sizes required to match thermometer connectors. Include bushings if required to match sizes.

C. Install thermowells with extension on insulated piping.

D. Fill thermowells with heat-transfer medium.

E. Install direct-mounted thermometers in thermowells and adjust vertical and tilted positions.

F. Install remote-mounted thermometer bulbs in thermowells and install cases on panels; connect cases with tubing and support tubing to prevent kinks. Use minimum tubing length.

G. Install duct-thermometer mounting brackets in walls of ducts. Attach to duct with screws.

H. Install direct-mounted pressure gages in piping tees with pressure gage located on pipe at the most readable position.

I. Install remote-mounted pressure gages on panel.

J. Install valve and snubber in piping for each pressure gage for fluids.

K. Install valve and syphon fitting in piping for each pressure gage for steam.

L. Install flow indicators in piping systems in accessible positions for easy viewing.

M. Assemble and install connections, tubing, and accessories between flow-measuring elements and flowmeters according to manufacturer's written instructions.

N. Install flowmeter elements in accessible positions in piping systems.

O. Install differential-pressure-type flowmeter elements, with at least minimum straight lengths of pipe, upstream and downstream from element according to manufacturer's written instructions.

P. Install permanent indicators on walls or brackets in accessible and readable positions.

Q. Install connection fittings in accessible locations for attachment to portable indicators.

R. Mount thermal-energy meters on wall if accessible; if not, provide brackets to support meters.

S. Install thermometers in the following locations:

1. Inlet and outlet of each hydronic zone.

2. Inlet and outlet of each hydronic boiler.

3. Inlet and outlet of each hydronic coil in air-handling units.

4. Outside-, return-, supply-, and mixed-air ducts.

T. Install pressure gages in the following locations:

1. Discharge of each pressure-reducing valve.

2. Suction and discharge of each pump.

3.2 CONNECTIONS

A. Install meters and gages adjacent to machines and equipment to allow service and maintenance of meters, gages, machines, and equipment.

B. Connect flowmeter-system elements to meters.

C. Connect flowmeter transmitters to meters.

D. Connect thermal-energy meter transmitters to meters.

3.3 ADJUSTING

A. After installation, calibrate meters according to manufacturer's written instructions.

B. Adjust faces of meters and gages to proper angle for best visibility.

3.4 THERMOMETER SCHEDULE

Retain this article if more than one type of thermometer is required; delete if all thermometers are the same type.

Retain and revise applicable thermometer applications. Coordinate with materials specified in Part 2.

Retain "one of" option in first paragraph below to allow Contractor to select thermometer materials from those retained.

A. Thermometers at inlet and outlet of each hydronic zone shall be one of the following:

Retain one or both subparagraphs below. If retaining more than one type of thermometer, indicate location of each on Drawings.

1. Sealed, bimetallic-actuated type.

2. Industrial-style, liquid-in-glass type.

Retain "one of" option in first paragraph below to allow Contractor to select thermometer materials from those retained.

B. Thermometers at inlet and outlet of each hydronic boiler shall be one of the following:

Retain one or both subparagraphs below. If retaining more than one type of thermometer, indicate location of each on Drawings.

1. Sealed, bimetallic-actuated type.

2. Industrial-style, liquid-in-glass type.

Retain "one of" option in first paragraph below to allow Contractor to select thermometer materials from those retained.

Retain "one of" option in first paragraph below to allow Contractor to select thermometer materials from those retained.

C. Thermometers at inlet and outlet of each hydronic coil in air-handling units and built-up central systems shall be one of the following:

Retain one or both subparagraphs below. If retaining more than one type of thermometer, indicate location of each on Drawings.

1. Sealed, bimetallic-actuated type.

2. Industrial-style, liquid-in-glass type.

Retain "one of" option in first paragraph below to allow Contractor to select thermometer materials from those retained.

Retain "one of" option in first paragraph below to allow Contractor to select thermometer materials from those retained.

Retain "one of" option in first paragraph below to allow Contractor to select thermometer materials from those retained.

Retain "one of" option in first paragraph below to allow Contractor to select thermometer materials from those retained.

D. Thermometers at outside-, return-, supply-, and mixed-air ducts shall be one of the following:

Retain one or both subparagraphs below. If retaining more than one type of thermometer, indicate location of each on Drawings.

1. Sealed, bimetallic-actuated type.

2. Industrial-style, liquid-in-glass type.

Insert additional paragraphs for thermometer applications here.

E. Thermometer stems shall be of length to match thermowell insertion length.

3.5 THERMOMETER SCALE-RANGE SCHEDULE

The IP and SI temperature values for the scale ranges presented in this article are not mathematical, rounded, conversions from IP to SI; rather they are the temperature ranges within each specific unit of measure that are available from most manufacturers.

Retain the first option in each paragraph for thermometers with a single scale in either deg F or deg C; retain the second option for thermometers with dual scales.

Scale ranges vary among types of thermometers and among manufacturers. Retain a scale range that covers more than service-fluid temperature range. Exact ranges listed are not mandatory.

Retain one or more of first three paragraphs below. If retaining more than one scale range, indicate location of each on Drawings.

Retain one or more of first three paragraphs below. If retaining more than one scale range, indicate location of each on Drawings.

A. Scale Range for Heating, Hot-Water Piping: 0 to 250 deg F.

B. Scale Range for Air Ducts: 0 to 150 deg F.

Insert additional paragraphs for thermometer scale ranges and applications here.

3.6 PRESSURE-GAGE SCHEDULE

Retain this article if more than one type of pressure gage is required; delete if all pressure gages are the same type.

Retain and revise applicable pressure gage applications. Coordinate with materials specified in Part 2.

Retain "one of" option in first paragraph below to allow Contractor to select pressure-gage materials from those retained.

A. Pressure gages at discharge of each pressure-reducing valve shall be one of the following:

Retain one or both subparagraphs below. If retaining more than one type of pressure gage, indicate location of each on Drawings.

1. Sealed, direct-mounted, metal case.

2. Sealed, direct-mounted, plastic case.

Retain "one of" option in first paragraph below to allow Contractor to select pressure-gage materials from those retained.

Retain one or both subparagraphs below. If retaining more than one type of pressure gage, indicate location of each on Drawings.

Retain "one of" option in paragraph below to allow Contractor to select pressure-gage materials from those retained.

B. Pressure gages at suction and discharge of each pump shall be one of the following:

Retain one or both subparagraphs below. If retaining more than one type of pressure gage, indicate location of each on Drawings.

1. Sealed, direct-mounted, metal case.

2. Sealed, direct-mounted, plastic case.

Insert additional paragraphs for pressure-gage applications here.

3.7 PRESSURE-GAGE SCALE-RANGE SCHEDULE

The IP and SI pressure values for the scale ranges presented in this article are not mathematical, rounded, conversions from IP to SI; rather they are the pressure ranges within each specific unit of measure that are available from most manufacturers.

Retain the first option in each paragraph for pressure gages with a single scale in either psi or kPa; retain the second option for pressure gages with dual scales.

Scale ranges vary among types of pressure gages and among manufacturers. Retain a scale range that covers more than service-fluid pressure range. Exact ranges listed are not mandatory.

Retain one or more of first three paragraphs below. If retaining more than one scale range, indicate location of each on Drawings.

A. Scale Range for Heating, Hot-Water Piping: 0 to 160 psi.

Insert additional paragraphs for pressure-gage scale ranges and applications here.

3.8 FLOWMETER SCHEDULE

Retain and revise applicable flowmeter applications. Coordinate with materials specified in Part 2.

A. Flowmeters for Heating, Hot-Water Piping: Pitot-tube type.

3.9 THERMAL-ENERGY METER SCHEDULE

A. Thermal-Energy Meters: Impeller-turbine type.

END OF SECTION 230519

Project No: 390265

METERS AND GAGES FOR HVAC PIPING

230519 - 8