DESIGN A/E NOTE - GUIDE SPECIFICATION CONVENTIONS
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Rev 19JUN09 j:\Projects\Active\com-deca_design_criteria_revisions-04071\Guide Specifications\TJG Innformation
SECTION 15135
GAGES AND METERS FOR HVAC AND PLUMBING
PART 1 - GENERAL
1.1 SUMMARY
1.1.1. Section Includes:
a. Flow meters.
b. Pressure gages and Pressure gage taps.
c. Thermometers and thermometer wells.
d. Filter gages.
e. Temperature and Pressure (T&P) Stations.
1.1.2. Related Sections:
a. Section 01042 - Mechanical, Refrigeration, Food Service Equipment and Electrical Coordination.
b. Section 01400 - Quality Control.
c. Section 01720 – [Phased Turnover and] contract Closeout.
d. Section 15410 – Plumbing Piping.
e. Section 15510 Hydronic Piping.
f. Section 15935 – Building HVAC Systems Controls.
1.2 QUALITY CONTROL
1.2.1. The following publications form a part of this specification to the extent they are applicable:
a. Section 01400 - Quality Control.
b. ASME B40.1 - Gages - Pressure Indicating Dial Type - Elastic Element.
c. ASME MFC-3M - Measurement of Fluid Flow in Pipes Using Orifice, Nozzle and Venturi.
d. ASTM D2458 Method of Flow Measurement by The Venturi Motor Tube.
e. ASTM E1 - Standard Specification for ASTM Thermometers.
f. ASTM E77 - Standard Test Method for Inspection and Verification of Thermometers.
g. ISA RP 3.2 Flange Mounted Sharp Edged Orifice Plates for Flow Measurement.
h. UL 393 - Indicating Pressure Gauges for Fire-Protection Service.
i. UL 404 - Gages, Indicating Pressure, for Compressed Gas Service.
1.3 SUBMITTALS
1.3.1. Submittals for Review:
a. Submit under provisions of Section 01400.
b. Product Data: Provide manufacturers data and list which indicates use, operating range, total range, accuracy, and location for manufactured components.
c. Operation and Maintenance data.
1.3.2. Submittals At Project Closeout
a. Section 01720 – [Phase Turnover and] Contract Closeout.
b. Project Record Documents: Record actual locations of components and instrumentation.
c. Include instructions for calibrating instruments. The Contractor shall submit all certifications and testing data as a supplement to previously submitted O & M manuals at contract closeout.
1.4 DELIVERY, STORAGE, AND HANDLING
a. Section 01560 Environmental Protection: Environmental conditions affecting products on site.
b. Do not install instruments when areas are under construction, except for required rough-in, taps, supports and test plugs.
1.5 MAINTENANCE PRODUCTS
a. Section 01720 – [Phase Turnover] and Contract Closeout.
1.6 EXTRA MATERIALS
a. Section 1720 – [Phase Turnover] and Contract Closeout.
1.7 ENVIRONMENTAL REQUIREMENTS
a. Do not install instrumentation when areas are under construction, except for required roughin, taps, supports and test plugs.
PART 2 - PRODUCTS
2.1 LIQUID FLOW METERS
a. Calibrated venturi orifice plate or pitot and flanges with valved taps, chart for conversion of differential pressure readings to flow rate, or annular element flow stations with meter set.
(1) Measuring Station: Type 316 stainless steel pitot type flow element with safety shutoff valves and quick coupling connections, and permanent metal tag indicating design flow rate, reading for design flow rate, metered fluid, line size, station or location number.
(a) Pressure rating: 275 psig
(b) Maximum temperature: 400 degrees F
(c) Accuracy: Plus or minus 2.5 percent.
(2) Portable Meter Set: Dry single diaphragm type pressure gage with 6 inch dial pointer, stainless steel wetted metal parts, variable pulsation damper, equalizing valve, two bleed valves, and master chart for direct conversion of meter readings to flow rate, mounted in rustproof carrying case with two ten foot long rubber test hoses with brass valves or quick connections for measuring stations.
2.2 PRESSURE GAGES
a. Gage: ASME B40.1, UL 393 [UL 404] drawn steel case, phosphor bourdon tube, rotary brass movement, brass socket, front recalibration adjustment, black scale on white background.
b. Case: Steel with brass bourdon tube or Cast aluminum with phosphor bronze bourdon tube.
c. Size: 4-1/2 inch.
d. Dial Size: 4 inch diameter.
e. Mid-Scale Accuracy: Two percent.
f. Scale: Psi.
2.3 PRESSURE GAGE TAPPINGS
2.3.1. Gage Cock:
a. Tee or lever handle, brass for maximum 150 psig.
2.3.2. Needle Valve:
a. Brass, 1/4 inch NPT for minimum [150 psig.] [300 psi.]
2.3.3. Ball Valve:
a. Brass, 1/8 inch NPT 250 psi.
2.3.4. Pulsation Damper:
a. Pressure snubber, brass with 1/4 inch NPT connections.
2.4 THERMOMETERS
2.4.1. Stem Thermometer: ASTM E1, adjustable angle, red appearing mercury, lens front tube, cast aluminum case with enamel finish, cast aluminum adjustable joint with positive locking device.
a. Size: 7 inch scale.
b. Window: Clear glass or Lexan.
c. Stem: Brass, [6 inch] [3/4 inch NPT.]
d. Accuracy: ASTM E77 2 percent.
e. Calibration: Degrees F.
2.4.2. Dial Thermometer: ASTM E1, stainless steel case, bimetallic helix actuated with silicone fluid damping, white with black markings and black pointer hermetically sealed lens, stainless steel stem.
a. Size: 3-1/2 inch diameter dial.
b. Lens: Clear Lexan.
c. Accuracy: 1 percent.
d. Calibration: Degrees F.
2.5 THERMOMETER SUPPORTS
a. Socket: Brass separable sockets for thermometer stems with or without extensions as required, and with cap and chain, to be mounted in piping systems.
b. Flange: 3 inch outside diameter reversible flange, designed to fasten to sheet metal air ducts, with brass perforated stem.
2.6 TEMPERATURE AND PRESSURE STATIONS
a. Manufacturer: SISCO P/T PLUGS
b. Other acceptable manufacturers offering equivalent products.
(1) Pete's Plugs
c. Test Plug: 1/4 inch or 1/2 inch brass fitting and cap for receiving 1/8 inch outside diameter pressure or temperature probe with neoprene core for temperatures up to 200 degrees F.
d. Test Kit: Carrying case, internally padded and fitted containing one 31/2 inch diameter pressure gage, one gage adapter with 1/8 inch probes, two 11/2 inch dial thermometers.
2.7 STATIC PRESSURE GAGES
a. 31/2 inch diameter dial in metal case, diaphragm actuated, black figures on white background, front recalibration adjustment, 2 percent of full scale accuracy.
b. Inclined manometer, red liquid on white background with black figures, front recalibration adjustment, 3 percent of full scale accuracy.
c. Accessories: Static pressure tips with compression fittings for bulkhead mounting, 1/4 inch diameter tubing.
PART 3 - EXECUTION
3.1 INSTALLATION
a. Section 01400 - Quality Control: Manufacturer's instructions.
b. Install one pressure gage per pump, with taps before strainers and on suction and discharge of pump; pipe to gage with isolating valves.
c. Install pressure gages with pulsation dampers. Provide gage cock, needle valve or ball valve to isolate each gage. Extend nipples to allow clearance from insulation.
d. Install thermometers in piping systems in sockets in short couplings. Enlarge pipes smaller than 2-1/2 inches for installation of thermometer sockets. Ensure sockets allow clearance from insulation.
e. Install thermometers in air duct systems on flanges.
f. Install Temperature and Pressure Stations in piping adjacent to controls systems thermostat, transmitter, or sensor sockets.
g. Locate additional Temperature and Pressure Stations where indicated.
h. Install thermometers in ductwork adjacent to thermostats and temperature sensors.
i. Provide instruments with scale ranges selected according to service with largest appropriate scale.
j. Install gages and thermometers in locations where they are easily read from normal operating level. Install vertical to 45 degrees off vertical.
k. Adjust gages and thermometers to final angle, clean windows and lenses, and calibrate to zero.
l. Locate duct mounted thermometers minimum 10 feet (3 m) downstream of mixing dampers, coils, or other devices causing air turbulence.
m. Coil and conceal excess capillary on remote element instruments.
3.2 SCHEDULES
a. Locate devices where shown on drawings.
b. Flow Meter Schedule:
LOCATION
Heating water system
Chilled water system
At cooling and heating coils where combination balancing and flow measurement valves are not used
Else where as shown on drawings or details
c. Pressure Gage Schedule
LOCATION SCALE RANGE
Cold Water supply to building 0 - 100 psig
Pumps 0 - 100 psig
Expansion tanks 0 - 100 psig
Pressure reducing valves - at inlet and outlet 0 - 100 psig
Boiler - at inlet and outlet 0 - 100 psig
Major cooling and heating coils inlets and 0 - 100 psig
outlets as shown on the drawings
Elsewhere as shown on drawings or details
d. Temperature and Pressure Stations Schedule
LOCATION
Control valves 3/4 inch (20 mm) & larger inlets and outlets
All cooling and heating coils inlets and outlets
Boiler inlets and outlets
Elsewhere as shown on drawings or details
e. Stem Type Thermometer Schedule - Water Thermometers
LOCATION SCALE RANGE
Thermostatic Mixing Valves - three required 50 - 250 deg.F
Headers to central equipment 50 - 250 deg.F
Major coils where shown on drawings inlets and outlets 50 - 250 deg.F
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GAGES AND METERS FOR HVAC AND PLUMBING
15135-6
Boilers and water heaters inlets and outlets 50 - 250 deg.F
Chiller inlets and outlets 50 - 250 deg.F
Else where as shown on drawings or details
f. Dial Thermometer Schedule - Air Thermometers
LOCATION SCALE RANGE
Each supply air zone 50 - 150 deg.F
Outside air -30 - 120 deg.F
Return air 50 - 150 deg.F
Mixed air 50 - 150 deg.F
Else where as shown on drawings or details
g. Static pressure and Filter Gauges
LOCATION
Filter banks on air handling units larger than 10,000 cfm.
h. Install static pressure gages to measure across filters and filter banks, (inlet to outlet). On multiple banks, provide manifold and single gage.
END OF SECTION
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GAGES AND METERS FOR HVAC AND PLUMBING
15135-6