This master should be used by designers working on Port of Portland construction projects and by designers working for PDX
tenants (“Tenants”). Usage notes highlight a few specific editing choices, however the entire section should be evaluated and
edited to fit specific project needs.
SECTION 230519 - METERS AND GAUGES FOR HVAC PIPING
PART 1 - GENERAL
1.1
DESCRIPTION
A.
1.2
This section describes water meters, water-flow meters, thermometers, and pressure gauges.
RELATED WORK SPECIFIED ELSEWHERE
A.
1.3
Section 230523, General Duty Valves for HVAC Piping
REFERENCES
A.
1.4
AWWA: American Water Works Association
SUBMITTALS
A.
For each item specified herein, submit product/material data; shop drawings; operation and
maintenance data; as-constructed data; operation and maintenance manuals; and as-constructed
drawings.
1.
Water flow meters: Include graph of output signal versus gpm for each device.
Use B only if Commissioning Section 019100 is included in the project manual.
B.
For each item specified herein, submit commissioning plans and schedules; checkout, start up,
operational, functional and final acceptance test plans, procedures, checklists, and reports; and
operation and maintenance training plans.
PART 2 - PRODUCTS
2.1
THERMOMETERS, WATER
A.
Acceptable Manufacturers: Ashcroft, Weiss, Trerice, Marshalltown, or equal.
B.
Description: Direct drive 4-1/2-inch dial type, stainless steel case, separable sockets, stem
length to penetrate minimum of half pipe diameter, adjustable face, extension necks where
required to clear insulation.
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C.
Range:
System
Chilled water
Heating water
Condenser water
2.2
Temperature ºF
25-125
30-240
25-125
Graduations (ºF)
1
1
1
THERMOMETERS, AIR
A.
Acceptable Manufacturers: Ashcroft, Weiss, Trerice, Marshalltown, or equal.
B.
Description: Direct drive 4-1/2-inch dial type, stainless steel case, separable sockets, stem
length to penetrate a minimum of 12-inch, duct flange, adjustable dial face.
C.
Range: 25ºF to 125ºF range with 1ºF divisions.
2.3
WATER METERS
A.
Acceptable Manufacturers: Hersey Model HD, Badger, Sparling, or equal.
B.
Description:
1.
Disc type meter, bronze split casing, magnetic drive.
2.
Heavy duty gear train, completely sealed, circular meter, totalize in cubic feet with sweep
hand.
3.
Comply with AWWA performance standards.
2.4
PRESSURE GAUGES
A.
Acceptable Manufacturers: Marsh, Ashcroft, Weiss, Trerice, or equal.
B.
Description: 4 1/2-inch dial, molded black polypropylene turret case.
C.
Range:
System
Chilled Water
Heating Water
Condenser Water
Low Pressure Steam
High Pressure Steam
2.5
Pressure (psi)
0-100
0-100
0-100
0-30
0-160
Graduations (psi)
1
1
1
1
1
WATER FLOW METERS
A.
Acceptable Manufacturers:
1.
Venturi type: Barco, Gerand, Olympic, or equal.
2.
Venturi type, grooved end: Victaulic, or equal.
3.
Pitot type: Dieterich Standard, Annubar, Taco, Olympic, or equal.
METERS AND GAUGES FOR HVAC PIPING
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B.
Venturi: Cast iron, 2 1/2-inch and above, 150 psi, quick disconnect valve, metal identification
tag on chain giving pipe size, flow rate, and meter reading. Design flow rate reading shall be
between 10 and 40 inches of water, with a permanent loss of 25 percent of indicated flow rate
differential. Accuracy to within 3 percent.
C.
Pitot type: Type 316 stainless steel, insertion pitot tube type, with quick disconnect valve, metal
identification tag on chain giving pipe size, flow rate, and meter reading. Accuracy within 3
percent.
D.
Application: Where indicated, at the Contractor’s option provide either venturi or pitot type of
water flow meter.
PART 3 - EXECUTION
3.1
INSTALLATION - GENERAL
A.
Provide water meters, thermometers, and pressure gauges where shown on the drawings.
B.
Install all devices as required and as recommended by the equipment manufacturer.
C.
Extend all connections, wells, cocks, or gauges to a minimum of 1 inch beyond insulation
thickness of the various systems.
D.
Locate all instruments so that they may be conveniently read at eye level or easily viewed and
read from the floor or from the most likely viewing area, e.g., platform, catwalk, etc.
E.
Install instruments over 6'-6" above floor, to be viewed from the floor, with face at 30 degrees
to horizontal.
3.2
INSTALLATION - PRESSURE GAUGES
A.
Provide instrument gauge cock at inlets.
B.
Locate pressure gauge taps for measuring pressure drop or increase across pumps, coils, etc., as
close to the device as possible.
3.3
INSTALLATION - WATER FLOW METER
A.
Install devices in accordance with the manufacturer’s recommendations, with sufficient
upstream and downstream straight pipe to obtain accurate readings.
B.
Install taps below centerline of pipe on water systems.
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Choose 3.4 or 3.5. Use 3.4 if Commissioning Section 019100 is included in the project manual; otherwise use 3.5.
3.4
COMMISSIONING
A.
3.5
Commission items specified herein.
TESTING
A.
Check out, start up, and test items specified herein.
END OF SECTION 230519
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