DIVISION 23 HEATING, VENTILATING, AND AIR CONDITIONING (HVAC) SECTION 23 05 02 PART 1 GENERAL 1.01 DESCRIPTION A. Provide all HVAC specialties required to complete the installation of all HVAC systems. B. Manufacturers: Refer to individual product item. PART 2 PRODUCTS 2.01 PRESSURE/TEMPERATURE TEST PLUGS (PETE'S PLUG) A. 1/4 inch NPT fittings to receive either a temperature or pressure probe, 1/8 inch O.D. Fitting, and caps shall be brass with valve core of Nordel, rated at 400 psig, 45 degrees F to 275 degrees F. B. HVAC Contractor shall furnish to the Owner: Two (2) Pressure gauge adapters with 1/8 inch O.D. probes One (1) Compound gauge, 30 inches Hg vacuum to 100 psig One (1) 0-100 psig gauge One (1) 0-30 inches Hg. vacuum gauge Two (2) 5 inch stem bimetal thermometers (Peterson Model 601 and Model 603) One (1) Protective carrying case C. Manufacturers: Peterson Equipment Company, Flow Design or Sisco. 2.02 GAUGES AND THERMOMETERS A. Pressure gauges shall have a 4 1/2 inch dial glass face with psig calibrations, ±0.5% of span accuracy, and provided with ball valve. Select pressure gauges with a full scale pressure range of approximately twice the normal operating pressure. The maximum operating pressure should not exceed 75% of the full scale range. B. Compound gauges shall have 4 1/2 inch dial glass face with psig and inches of mercury calibrations, ±0.5% of span accuracy and provided with ball valve. C. Thermometers shall be industrial type, 9 inch scale, heavy-duty casing, mercury-free, nontoxic organic spirit-filled, double-strength window, adjustable angle, insertion bulb, separable socket with insulated extension and degrees Fahrenheit calibration. Provide 0-120 degrees F range for chilled water and condenser water systems; 30-240 degrees F for heating hot water systems. D. Provide throttling devices when a pressure gauge is measuring pressure immediately on the discharge of any pump, and in all other places where gauges may be subject to rapid pressure fluctuations. Use throttle screws, pulsation dampeners, gauge savers, pressure snubbers, instrument valves, or steel needle valves appropriate for the specific application. 13-HC1-033 23 05 02-1
E. Provide pigtail siphons for steam pressure gauges up to 500 psig and 400 degrees F. F. Provide ball valves for all pressure gauges. G. Manufacturers: Ashcroft, Miljoco, Trerice, Marsh, Marshalltown, Weksler or Weiss. 2.03 HYDRONIC SPECIALTIES AND PIPING AUXILIARIES A. Water Pressure Reducing Valves 1. For fill pressure up to 25 psig, install low pressure reducing valve with inlet pressure check valve and removable strainer. (B&G No. B7-12) 2. For fill pressure up to 60 psig install high pressure reducing valve with low-pressure check valve, removable strainer, and extra large diaphragm. (B&G No. 7) B. ASME Safety Relief Valves 1. Install bronze body ASME safety relief valves on make-up water line to protect make up water line against overpressure conditions. Relief settings shall be no greater than the boiler pressure rating. (B&G No. 790) 2. Manufacturers: ITT Bell & Gossett, Taco, Amtrol, or Armstrong. C. Air Separator 1. Install a centrifugal type air separator with flange size of openings equal to the main hot water pipe size. 2. Air separator shall meet ASME code and be designed for 125 psig and 350 degrees F service. 3. Manufacturers: ITT Bell & Gossett, Taco, Amtrol, Armstrong, Elbi, Wheatley, or Wood Industrial. D. High Capacity Air Vents 1. Install high capacity air vents at the highest point of the water main and at the top of the main risers. 2. Vents shall be designed for 125 psig and 250 degrees F. (B&G No. 107A) E. Automatic Air Vents 1. Install automatic air vents at high points of branch pipes and risers, coils, and heating elements. 2. Vent shall be designed for 125 psig and 240 degrees F. (B&G No. 87) F. "Coin Operated" Air Vents 1. Install air vents at high points of branch pipes and risers, coils, and heating elements. 2. Air vent shall be designed for 125 psig and 250 degrees F. 23 05 02-2 13-HC1-033
G. Manual Balancing Valves 1. Install balancing valves with separate shut-off or service valves, where shown on the Drawings. Valves shall be designed for use as a balancing valve and flow measurement device, to facilitate adjustment of system flow rates to meet project design requirements. Provide means for connecting to a portable differential pressure meter for readout. 2. Valves shall be equipped with flanged or union connections, read out ports with integral check valves, and a variable orifice or a fixed venturi for differential pressure readings. 3. Valves shall be designed for 125 psig and 250 degrees F. 4 Manufacturers: ITT Bell & Gossett, "Circuit Setter," Flow Design, Tour and Anderson, Griswold, Taco, Hayes, or Armstrong. H. Manual Combination Balancing and Shutoff Valves 1. Install combination balancing valves with integral service shut-off valves, where shown on the Drawings. Valves shall be designed for use as a balancing valve, a flow measurement device, and an isolation valve to facilitate adjustment of system flow rates to meet project design requirements, and for positive service shutoff. Provide means for connecting to a portable differential pressure meter for readout. 2. 2 inches and smaller: 125 psig working pressure at a maximum temperature of 250 degrees F. Provide bronze body full port ball valves with fixed venturi or variableorifice design. Provide integral calibrated dial on valves using a variable orifice, and a memory stop on variable orifice devices. a. Armstrong Series CBV, Bell & Gossett "Circuit Setter Plus," Tour and Anderson, Griswold "Quick Set," Taco, Flow Design "Accusetters," Hayes, or HCi. 3. 2 1/2 inches and larger: 125 psig WOG, cast iron body with brass trim valve including upstream and downstream taps, with fixed venturi or variable-orifice design. Provide integral calibrated dial on valves using a variable orifice, and a memory stop on variable orifice devices. a. Armstrong Series CBV, Bell & Gossett "Circuit Setter Plus," Tour and Anderson, Griswold "Quick Set," Flow Design "Accusetters," Taco, Hayes, or HCi. 4. Provide portable test kit in protective case, complete with portable pressure gauge, hoses and flow curves applicable to all balancing valves used. I. Factory Assembled Valve Hookups-2 inches and smaller 1. All components shall be rated for 125 psig working pressure and shall be full-port (fullbore) design. 2. The component order and arrangement shall comply with the piping diagrams shown on Drawings. 3. The individual components of the assembly shall meet the specification requirements for components of a field-assembled system. 4. Acceptable manufacturers include Flow Design, Griswold, Hayes, and HCi. J. Vacuum Breakers 1. Install vacuum breakers to protect pressure vessels and piping systems against collapse when vacuum is induced. (B&G NO. 2.6) 2. Manufacturers: ITT Bell & Gossett, Taco, Amtrol, or Armstrong. K. Triple Duty Valves Not Allowed L. Dielectric Unions 13-HC1-033 23 05 02-3
1. Union shall be ground joint, bronze to bronze when connecting steel to copper pipe. 2. Install Dielectric Unions at all pipe connections of dissimilar metal. 3. Manufacturer: Epic or Capitol Manufacturing Company. M. Strainers 1. Install strainers before all pumps, coils, flow meters, and control valves. 2. Y-type strainers, cast bronze body with screwed ends for sizes up through 2 inches, and cast iron body with flanged ends on sizes 2 1/2 inches and larger, rated for 125 psig, with perforated stainless steel screen. Screen opening sizes: Up to 2 inches - 0.033 inch, 2 1/2 inches through 4 inches - 0.062 inch, 5 inches and up-1/8 inches. Provide blowdown valve with hose end fitting. 3. Basket strainers, clamped cover, 125 lb. cast iron body with flanged connections and perforated stainless steel screen. Screen opening sizes: Up to 2 inches - 0.033 inch, 2 1/2 inches through 4 inches - 0.062 inch, 5 inches and up-1/8 inch. 4. Manufacturers: Armstrong, Wheatley, Keckley, Meuller, FabroTech, or Islip. N. Make-up Water Solenoid Valves 1. Normally closed solenoid valve. 2. Manufacturers: ASCO or Magnetrol. 2.04 STEAM SPECIALTIES A. Steam Traps 1. Inverted Bucket: All stainless steel construction for maximum operating pressure 400 psig at 800 degrees F with side inlet, side outlet, continuous air venting and three year guarantee. 2. Float and Thermostatic: Cast iron body ASTM A-278, with stainless steel valve, valve seat, float and mechanism, for maximum operating pressure of 175 psig at 450 degrees F. 3. Thermostatic: Carbon Steel body with stainless steel bulkhead, strainer, and gasket, for 600 psig at 750 degrees F maximum operating conditions. 4. Install steam traps with no less than the minimum fill head required by the steam trap manufacturer. 5. Manufacturers: Armstrong, or Spirax-Sarco, Watson McDaniel, or Hoffman. B. Y-Type Strainers 1. Install strainers before all traps, coils, heat exchangers, and control valves. 2. Cast iron body with 0.045 inch perforated stainless steel screen for screwed or flanged ends, for 150 psig S.W.P. and 400 degrees F operating conditions. 3. Cast carbon steel with 0.045 inch perforated stainless steel screen with screwed or socket weld for 300 psig S.W.P. at 850 degrees F. 4. Manufacturers: Armstrong, Wheatley, Keckley, or FabroTech. 23 05 02-4 13-HC1-033
PART 3 EXECUTION 3.01 INSTALLATION A. Contractor shall install specialties at locations and in an arrangement required to facilitate the maintenance, operation, and servicing of all HVAC piping systems. B. Clean all strainers before system start-up and balancing. C. Install pressure reducing stations in the locations shown on the Drawings and connect high pressure and low pressure steam mains. Install valves, traps, strainers, steam pressure gauges, and specialties as detailed on the Drawings. END OF SECTION 13-HC1-033 23 05 02-5