36C25618B0076-00002001.doc

Project 667-18-114 Correct Medical Gas & Vacuum Deficiencies

SECTION 22 63 00

GAS SYSTEMS FOR LABORATORY AND HEALTHCARE FACILITIES

PART 1 ‑ GENERAL

1.1 DESCRIPTION

A.

Central Laboratory and Healthcare Gas Systems: Consisting of oxygen, nitrous oxide, nitrogen, and compressed air services; complete, ready for operation, including all necessary piping, fittings, valves, cabinets, station outlets, rough‑ins, ceiling services, gages, alarms including low voltage wiring, nitrogen control panels, cylinder manifolds, air compressors, electric motors and starters, air dryers, filters, pressure regulators, dew point, carbon monoxide monitors and all necessary parts, accessories, connections and equipment. Match existing station outlet and inlet terminal connections.

B.

Oxygen System: Ready for connection to outside bulk supply tank, but not including tank.

C.

Oxygen System: Provide bulk oxygen system consisting of primary liquid tank, reserve liquid tank, vaporizers, alarms including all low voltage wiring, and automatic controls including all interconnecting control and power wiring. Connect to bulk supply main at outside bulk tank farm.

D.

Nitrous Oxide and Nitrogen Systems: Ready for connection to cylinders, but not including cylinders.

E.

Supply Lines Outside of Building (including PVC protective pipe): As specified in this Section.

F.

Laboratory and healthcare gas system alarm wiring from equipment to alarm panels.

1.2 RELATED WORK

A.

Sealing around pipe penetrations to maintain the integrity of time rated construction: Section 07 84 00, FIRESTOPPING.

B.

Sealing around pipe penetrations through the floor to prevent moisture migration: Section 07 92 00, JOINT SEALANTS.

C.

General requirements and items common to more than one section of Division 22. Section 22 05 11, COMMON WORK RESULTS FOR PLUMBING.

D.

Conduit: Section 26 05 33, RACEWAY AND BOXES FOR ELECTRICAL SYSTEMS.

E.

Control wiring: Section 26 05 19, LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES (600 VOLTS AND BELOW).

G.

Electrical wiring and accessories: Section 26 27 26, WIRING DEVICES.

H.

Vacuum Piping and Equipment: SECTION 22 62 00, VACUUM SYSTEMS FOR LABORATORY AND HEALTHCARE FACILITIES

1.3 QUALITY ASSURANCE

A.

Materials and Installation: In accordance with NFPA 99 and as specified.

B.

Equipment Installer: Show technical qualifications and previous experience in installing laboratory and healthcare equipment on three similar projects. Submit names, phone numbers, and addresses of referenced projects. Installers shall meet the qualifications of ASSE Standard Series 6000.

C.

Equipment Supplier: Provide evidence of equivalent product installed at three installations similar to this project that has been in satisfactory and efficient operation for three years. Submit names, phone numbers, and addresses where the product is installed.

D.

Laboratory and healthcare System Testing Organization: The testing shall be conducted by a party technically competent and experienced in the field of laboratory and healthcare pipeline testing. Testing and systems verification shall be performed by personnel meeting the qualifications of ASSE Standard Series 6000. Such testing shall be performed by a party other than the installing contractor.

E.

Provide the names of three projects where testing of medical or laboratory gases systems has been performed by the testing agency. Include the name of the project, names of such persons at that project who supervised the work for the project owner, or who accepted the report for the project owner, and a written statement that the projects listed required work of similar scope to that set forth in this specification.

F.

Submit the testing agency's detailed procedure which shall be followed in the testing of this project. Include details of the testing sequence, procedures for cross connection tests, outlet function tests, alarm tests, purity tests, etc., as required by this specification. For purity test procedures, include data on test methods, types of equipment to be used, calibration sources and method references.

G.

Certification: Provide COR documentation 10 working days prior to submitting request for final inspection to include all test results, the names of individuals performing work for the testing agency on this project, detailed procedures followed for all tests, and certification that all results of tests were within limits allowed by this specification.

H.

“Hot taps” are prohibited for operating medical oxygen systems. Methods for connection and extension of active and pressurized medical gas systems without subsequent medical gas testing and verification are prohibited.

1.4 SUBMITTALS

A.

Submittals, including number of required copies, shall be submitted in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, AND SAMPLES.

B.

Information and material submitted under this section shall be marked “SUBMITTED UNDER SECTION 22 63 00, GAS SYSTEMS FOR LABORATORY AND HEALTHCARE FACILITIES”, with applicable paragraph identification.

C.

Manufacturer's Literature and Data including: Full item description and optional features and accessories. Include dimensions, weights, materials, applications, standard compliance, model numbers, size, and capacity.

1.

Piping.

2.

Valves.

3.

Inlet and outlet cocks

4.

Valve cabinets.

5.

Gages.

6.

Station outlets and rough‑in assemblies.

7.

Ceiling services.

8.

Alarm controls and panels.

9.

Pressure Switches.

10.

Nitrogen control panels.

11.

Manifolds.

12.

Air compressor systems (Provide certified compressor test data at startup.):

a.

Compressors: Manufacturer and model.

b.

Characteristic performance curves.

c.

Compressor operating speed (RPM).

d.

Capacity: Free air delivered at indicated pressure (L/s) (SCFM).

e.

Type of bearing in compressor.

f.

Type of lubrication.

g.

Type and adjustment of drive.

h.

Electric motors: Manufacturer, frame and type.

i.

Speed of motors (RPM).

j.

Current characteristics and horsepower of motors.

k.

Receiver capacity and rating.

l.

Air silencer: Manufacturer, type and model.

m.

Air filters: Manufacturer, type, model and capacity.

n.

Pressure regulators: Manufacturer and capacity.

o.

Dew point monitor: Manufacturer, type and model.

p.

Air dryers: Manufacturer, type, model and capacity (L/s) (SCFM).

q.

Carbon monoxide monitor manufacturer, type and model.

r.

Aftercoolers.

D.

Station Outlets: Submit letter from manufacturer stating that outlets are designed and manufactured to comply with NFPA 99. Outlet shall bear label of approval as an assembly, of Underwriters Laboratories, Inc., or Associated Factory Mutual Research Corporation.

E.

Certification: The completed systems have been installed, tested, purged, analyzed and verified in accordance with the requirements of this specification. Certification shall be submitted to COR.

1.5 Training

A.

Furnish the services of a competent instructor for not less than two four-hour periods for instructing personnel in the operation and maintenance of the laboratory and healthcare gas systems, on the dates requested by COTR.

B.

Coordinate with other requirements specified in Section 01 00 00, GENERAL REQUIREMENTS.

1.6 APPLICABLE PUBLICATIONS

A.

The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the test by the basic designation only.

B.

American Society of Mechanical Engineers (ASME):

A13.1-2007 (R2013) Scheme for the Identification of Piping Systems

B16.15-2013 Cast Copper Alloy Threaded Fittings: Classes 125 and 250

B16.22-2013 Wrought Copper and Copper Alloy Solder-Joint Pressure Fittings

B16.50-2013 Wrought Copper and Copper Alloy Braze-Joint Pressure Fittings

B40.100-2013 Pressure Gauges and Gauge Attachments

ASME Boiler and Pressure Vessel Code ‑

BPVC Section VIII-2015 Rules for Construction of Pressure Vessels, Division I

BPVC Section IX-2015 Welding, Brazing, and Fusing Qualifications

C.

American Society of Sanitary Engineers (ASSE):

6000 Series-2012 Professional Qualifications Standard for Medical Gas Systems Personnel D.

American Society for Testing and Materials (ASTM):

B43-2014 Standard Specification for Seamless Red Brass Pipe, Standard Sizes

B687-1999 (2011) Standard Specification for Brass, Copper, and Chromium-Plated Pipe Nipples

B819-2000 (R2011) Standard Specification for Seamless Copper Tube for Medical Gas Systems

D1785-2012 Standard Specification for Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120

E.

American Welding Society (AWS):

A5.8M/A5.8-2011 Specification for Filler Metals for Brazing and Braze Welding

B2.2/B2.2M-2010 Specification for Brazing Procedure and Performance Qualification

F.

Compressed Gas Association (CGA):

C-9-2013 Standard Color Marking of Compressed Gas Containers for Medical Use

G-4.1-2009 Cleaning Equipment for Oxygen Service

G-10.1-2008 Commodity Specification for Nitrogen

P-9-2008 The Inert Gases: Argon, Nitrogen, and Helium

V-1-2013 Standard for Compressed Gas Cylinder Valve Outlet and Inlet Connections

G.

Manufacturing Standardization Society (MSS):

SP-72-2010a Ball Valves With Flanged or Butt-Welding Ends For General Service

SP-110-2010

Ball Valves Threaded, Socket-Welding, Solder Joint, Grooved and Flared Ends

H.

National Electrical Manufacturers Association (NEMA):

ICS 6-1993 (R2001, R2006)

Industrial Control and Systems Enclosures

I.

National Fire Protection Association (NFPA):

99-2015 Health Care Facilities Code

PART 2 ‑ PRODUCTS

2.1 PIPING AND FITTINGS

A.

Copper Tubing: Type "K", ASTM B819, seamless copper tube, hard drawn temper, with wrought copper fittings conforming to ASME B16.22 or brazing fittings complying with MSS SP-73. Size designated reflecting nominal inside diameter. All tubing and fittings shall be labeled "ACR/OXY", "OXY", "OXY/MED", "ACR/MED", or "MED".

B.

Brazing Alloy: AWS A5.8, Classification BCuP, greater than 537 (C (1000 (F) melting temperature. Flux is strictly prohibited for copper‑to‑copper connections.

C.

Threaded Joints: Polytetrafluoroethylene (teflon) tape.

D.

Underground Protective Pipe: Polyvinyl Chloride (PVC), ASTM D1785, Schedule 80.

E.

Memory metal couplings: Temperature and pressure rating shall not be less than that of a brazed joint.

F.

Apply piping identification labels at the time of installation in accordance with current NFPA. Apply supplementary color identification in accordance with CGA Pamphlet C-9.

G.

Special Fittings: The following special fittings shall be permitted to be used in lieu of brazed joints:

1.

Memory-metal couplings having temperature and pressure ratings joints not less than that of a brazed joint.

2.

Listed or approved metallic gas tube fittings that, when made up, provide a permanent joint having the mechanical, thermal, and sealing integrity of a brazed joint.

3.

Dielectric fittings where required by the manufacturer of special medical equipment to electrically isolate the equipment from the piping distribution system.

4.

Axially swaged, elastic strain preload fittings providing metal to metal seal having pressure and temperature ratings not less than that of a brazed joint and when complete are permanent and non-separable.

2.2 EXPOSED LABORATORY AND HEALTHCARE GASES PIPING

A.

Finished Room: Use full iron pipe size chrome plated brass piping for exposed laboratory and healthcare gas piping connecting fixtures, casework, cabinets, equipment and reagent racks when not concealed by apron including those furnished by the Government or specified in other sections.

1.

Pipe: Fed. Spec. WW‑P‑351, standard weight. ASTM B43.

2.

Fittings: ASME B16.15 cast bronze threaded fittings with chrome finish, (125 and 250 PS1 Classes).

3.

Nipples: ASTM B 687, Chromium-plated.

4.

Unions: Mss SP-72, SP-110, Brass or Bronze with chrome finish. Unions 65 mm (2‑1/2 inches) and larger shall be flange type with approved gaskets.

5.

Valves: Mss SP-72, SP-110, Brass or bronze with chrome finish.

2.3 VALVES

A.

Ball: In-line, other than zone valves in cabinets:

1.

Seventy five millimeter (2 1/2 inches) and smaller: Bronze/ brass body, Fed. Spec. MSS SP72 & SP 110 , Type II, Class 150, Style 1, with tubing extensions for brazed connections, full port, three‑piece or double union end connections, teflon seat seals, full flow, 4125 kPa ( 600 psi) WOG minimum working pressure, with locking type handle, cleaned for oxygen use and labeled for intended service 2.

Eighty to one hundred millimeter (3-4 inches): Bronze/ brass body, Fed. Spec. MSS SP72 & SP 110, Type II, Class 150, Style 1 with tubing extensions brazed to flanges, full ported, three piece, double seal, teflon seals, full flow, 4125 kPa (600 psi) WOG minimum working pressure, with locking type handle, cleaned for oxygen use and labeled for intended service.

B.

Check:

1.

Eighty millimeter (3 inches) and smaller: Bronze/brass body, straight through design for minimum pressure drop, spring loaded, self aligning with teflon cone seat, vibration free, silent operation, supplied NPT female threads at each end with flow direction arrow permanently cast into, cleaned for oxygen use and labeled for intended service, 2750 kPa (400 psi) WOG minimum working pressure.

2.

One hundred millimeter (4 inches) and larger: Iron body, bronze trim, swing type, vertical or horizontal installation, flange connection, with flow direction arrow permanently cast into, cleaned for oxygen use and labeled for intended service, 1025 kPa (150 psi) WSP.

C.

Zone Valve in Cabinet: Ball valve, bronze/ brass body, double seal, three piece or double union end connections, replaceable teflon seat seals, teflon stem seal, 4125 kPa (600 psi) WOG, cold, non‑shock gas working pressure service to 100 kPa (29 inch Hg), cleaned for oxygen use and labeled for intended service, blowout proof stem, one quarter turn of handle to completely open or close. Provide tubing extensions factory brazed, and pressure tested. Provide 3 mm (1/8 inch) NPT gauge port for a 50mm (2 inch) diameter monitoring gauge downstream of the shut off valve. Zone valves shall be securely attached to the cabinet and provided with type-K copper tube extensions for making connection to system piping outside the cabinet. Zone valves shall be products of one manufacturer, and uniform throughout in pattern, overall size and appearance. Trim with color coded plastic inserts or color coded stick‑on labels. Install valves in cabinets such that cover window cannot be in place when any valve is in the closed position. Color coding for identification plates and labels is as follows:

2.4 VALVE CABINETS

A.

Flush mounted commercially available item for use with laboratory and healthcare services, not lighter than 1.3 mm (18 gage) steel or 1.9 mm (14 gage) extruded aluminum, rigidly assembled, of adequate size to accommodate valve(s) and fittings. Punch or drill sides to receive tubing. Provide anchors to secure cabinet to wall construction. Seal openings in cabinet to be dust tight. Locate bottom of cabinet 1375 mm (4 foot 6 inches) above floor.

B.

Mount engraved rigid plastic identification plate on wall above or adjacent to cabinet. Color code identification plate to match gas identification colors as indicated above. Identification plate must be clearly visible at all times. Provide inscriptions on plate to read in substance: "VALVE CONTROL SUPPLY TO ROOMS."

C.

Cover plate: Fabricate from 1.3 mm (18 gage) sheet metal with satin chromed finish, extruded anodized aluminum, or .85 mm (22 gage) stainless steel. Provide cover window of replaceable plastic, with a corrosion resistant device or lever secured to window for emergency window removal. Permanently paint or stencil on window: Caution-close only in Emergency, SHUT‑OFF VALVES FOR PIPED GASES", or equivalent wording. Configure such that it is not possible to install window with any valve in the closed position. Each valve shall have gauge upstream of valve inside valve box.

D.

Cabinets and isolation valves shall be located and piped as shown, and at a minimum, so as to allow the isolation of each smoke compartment separately. No cabinet shall serve more than one smoke compartment.

2.5 GAGES

A.

Pressure Gages: Includes gages temporarily supplied for testing purposes.

1.

For line pressure use adjacent to source equipment: ASME B40.1, pressure gage, single, size 115 mm (4‑1/2 inches), for compressed air, nitrogen and oxygen, accurate to within two percent, with metal case. Range shall be two times operating pressure. Dial graduations and figures shall be black on a white background, or white on a black background. Gage shall be cleaned for oxygen use, labeled for appropriate service, and marked "USE NO OIL". Install with gage cock.

2.

For all services downstream of main shutoff valve: Manufactured for oxygen use, labeled for the appropriate service and marked "USE NO OIL", 40 mm (1‑1/2 inch) diameter gage with dial range 1-690 kPa (1‑100 psi) for air service .

2.6 STATION OUTLETS

A.

For all services except ceiling hose drops and nitrogen system: For designated service, consisting of a quick coupler and inlet supply tube. Provide coupler that is non-interchangeable with other services, and leak proof under three times the normal working pressure. Equip each station outlet with an automatic valve and a secondary check valve to conform with NFPA 99. Equip each station inlet with an automatic valve to conform with NFPA 99. Place valves in the assembly to provide easy access after installation for servicing and replacement, and to facilitate line blow-out, purging, and testing. Fasten each outlet and inlet securely to rough-in to prevent floating and provide each with a capped stub length of 6 mm (1/4-inch) (10 mm outside diameter) (3/8-inch outside diameter) tubing for connection to supply. Identification of each gas service shall be permanently cast into the back plate and shall be visible through a transparent plastic guard. Label stub tubing for appropriate service. Rough-in kits and test plugs for Prefabricated Bedside Patient Units (PBPU) are furnished under this specification but installed by manufacturer of PBPUs before initial test specified herein. Install completion kits (valve body and face plate) for the remainder of required tests.

B.

For Ceiling Hose Drops and Nitrogen Service: Brass, stainless steel or chromed metal non‑interchangeable DISS connections for appropriate service to conform with CGA V‑5. Equip each station outlet with an automatic valve and a secondary check valve to conform with NFPA 99. Equip each station inlet with an automatic valve to conform with NFPA 99. Place valves in the assembly to provide easy access after installation, for servicing and replacement, and to facilitate line blow-out, purging, and testing. Fasten each outlet and inlet securely to rough-in to prevent floating, and provide each with a capped stub length of 6 mm (1/4-inch) (10 mm (3/8-inch) outside diameter) tubing for connection to supply. Label stub tubing for appropriate service. Adjust to compensate for variations in plaster or cover thickness. //

2.7 STATION OUTLETS

For all services: Brass, stainless steel or chromed metal non‑interchangeable DISS connections for appropriate service to conform with CGA V-5. Equip each station outlet with an automatic valve and a secondary check valve to conform with NFPA 99. Equip each station inlet with an automatic valve to conform with NFPA 99. Place valves in the assembly to provide easy access after installation, for servicing and replacement, and to facilitate line blow-out, purging, and testing. Fasten each outlet securely to outlet rough-in to prevent floating, and provide each outlet with a capped stub length of 6 mm (1/4-inch) (10 mm (3/8-inch) outside diameter) tubing for connection to supply. Label stub tubing for appropriate service. Adjustable to compensate for variations in plaster or cover thickness. Rough-in kits and test plugs for Prefabricated Bedside Patient Units (PBPU) are furnished under this specification but installed by manufacturer of PBPUs before initial tests specified herein. Install outlet completion kits (valve body and face plate) for the remainder of required tests.

2.8 STATION OUTLET ROUGH‑IN

A.

Flush mounted, protected against corrosion. Anchor rough-in securely to unit or wall construction.

B.

Modular Cover Plate: Die cast back plate, two‑piece .85 mm (22 gage) stainless steel or 1.6 mm (16 gage) chromium plated metal, with mounting flanges on all four sides, secured to rough‑in with stainless steel or chromium plated countersunk screws.

C.

Cover Plate for Prefabricated Bedside Patient Units (PBPU): One‑piece with construction and material as indicated for modular cover plate.

D.

Provide permanent, metal or plastic, identification plates securely fastened at each outlet and inlet opening, with inscription for appropriate service using color coded letters and background. Metal plates shall have letters embossed on baked‑on enamel background. Color coding for identification plates is as follows:

2.9 CEILING SERVICES

A.

Column accessories:

1.

Equip each utility column with flush type quick coupler gas service station outlets, except nitrogen outlets shall be DISS, as specified under Article, STATION OUTLETS. Provide the following outlets, mounted on the utility column: two oxygen, one nitrous oxide, one nitrogen, one medical air, and one carbon dioxide.

2.

Provide one 48 mm by 80 mm (1-7/8” by 3”) blank and face plate for future installation of mass spectrometer inlet tubing and wiring.

3.

Provide spacing to allow for future installation of up to three monitoring receptacles.

4.

Provide four single, NEMA 5‑20R, hospital grade receptacles rated at 20 amps, 125 volts, 2 pole, 3 wire; two grounding receptacles. Coordinate with Section 26 27 26, WIRING DEVICES.

5.

Equip column with four I.V. hooks.

6.

Provide one 48 mm by 80 mm (1 7/8” x 3”) blank face plate for computer connection.

B.

Articulating Utility Column:

1.

Pendent: Articulating arm and head constructed of lightweight aluminum alloy castings enclosed in high impact, flame retardant (UL 94 V-O) dress shrouds. Arm shall have a minimum of 508 mm (20-inch) vertical range of motion and a horizontal swing of 5.67 RAD (330 degrees), adjustable in .26 RAD (15 degree) increments. Head shall have a minimum rotation of 5.76 RAD (330 degrees) adjustable in .26 RAD (15 degree) increments. Minimum reach of the arm from ceiling pivot to head pivot is 889 mm (37 inches). The total reach of the pendant with head perpendicular to the arm axis is 1450 mm (57 inches). Vertical motion shall be achieved by 93 watts (1/8 hp) induction motor. Driven linear motion is by hand control contained in housing. Pneumatic driven unit shall consist of a pneumatic cylinder, duplex regulating valve, pressure gauge, filter, pressure relief valve, master control valve and lubricator/muffler. The entire vertical motor mechanism within unit shall be furnished and pre-installed. The weight capacity of head shelf shall be 79 kg (175 pounds) of weight mounted onto integral shelf or 57 kg (125 pounds) if the optional monitor mount is used. Nitrogen control system shall be integral with the unit with internal regulators mounted in the dispensing head. Factory assembled and tested. Provide with complete protective cover for the duration of construction.

2.

Ceiling Support: Provide manufacturers standard anchoring device for pendant. Provide all required hardware to support pendent from the building structure.

C.

Retractable Utility Column:

1.

Column: Upper section for rigid mounting at drop‑ceiling level, and counter‑balanced telescoping lower section capable of being extended and retracted minimum 450 mm (18‑inches). Provide fail‑proof stops to prevent the underside from extending lower than 1675 mm (5 foot 6 inches) above finished floor. Equip with combination handle and release lever to allow the lower telescoping section to be positively locked in any position from fully extended to fully retracted. Construct vertical sections with 1 mm (20 gage) stainless steel and bottom plate with 1.9 (14 gage) stainless steel. Welded seams shall be ground smooth for seamless appearance. Except for the escutcheon which may be extruded aluminum, exposed surfaces shall be NAAMM Number 4 satin finish stainless steel. Provide access panels to allow inspection of interior column fittings. Nitrogen control system shall be integral with the unit with internal regulators mounted in the dispensing head. Factory assembled and tested. Provide with complete protective cover for the duration of construction.

D.

Ceiling Mounted Station Outlets: As specified under Article, STATION OUTLETS, flush mount on ceiling and provide with hose tubing drops and retractors. Extend male thread DISS connection through ceiling plate.

1. Hoses: Conductive, neoprene tubing, color coded for appropriate service, dropping to within 1372 mm (4 feet 6 inches) from floor, with upper end of hose having female DISS connection with nut, easily finger tightened to ceiling outlet or inlet, and lower end of hose having DISS connection only for nitrogen service, and matching existing equipment for all other services. Color coding for hoses is as follows:

2.

Rough-in: Standard metal single gang, interchangeable, sectional or one piece, securely anchored to ceiling runner channels; ceiling plates of die cast plate, .85 mm (22 gage) stainless steel or 1.6 mm (16 gage) chromium plated metal. Attach identification plate, as specified in Article, STATION OUTLET AND INLET ROUGH-IN, to ceiling plate adjacent to each outlet and inlet.

3.

Hose retractor kit: Chrome‑plated, spring loaded assembly and hose clamps with stainless steel sash chain; to automatically withdraw hose assembly a minimum of 508 mm (20‑inches) from fully extended position of 1425 mm (4 feet 8 inches) to 1930 mm (6 feet 4 inches) above finished floor.

2.10 ALARMS

A.

Provide all low voltage control wiring, except for wiring from alarm relay interface control cabinet to ECC, required for complete, proper functioning system, in conformance with Section 26 05 19, LOW-VOLTAGE ELECTRICAL POWER CONDUCTORS AND CABLES (600 VOLTS AND BELOW). Run wiring in conduit, in conformance with Section 26 05 33, RACEWAY AND BOXES FOR ELECTRICAL SYSTEMS.

B.

Local Alarm Functions: Provide individual local air compressor malfunction alarms at each compressor system main control panel.

1.

Compressor Malfunction Alarm: Each compressor system receiving any of the following individual signals and sends a single combined "compressor malfunction alarm" signal to master alarm panel.

a.

Thermal Malfunction Alarm: Functions when discharge air temperature exceeds 177 (C (350 (F), shutting down affected compressor.

b.

Lead Compressor Fails to Start: Functions when lead compressor fails to start when actuated, causing lag pump to start.

c.

Lag Compressor in Use: Functions when the primary or lead compressor in incapable of satisfying the demand. When three or more compressors are part of the system, the lag compressor in use alarm shall energize when the last compressor has been signaled to start.

d.

High Water Level in Receiver. (Liquid ring or water-cooled units) e.

High Water Level in Separator (if so required). (Liquid ring unit)

2.

Desiccant Air Dryer Malfunction Alarm: Dryer receives the following individual signals and sends a single consolidated dryer malfunction alarm signal to master alarm panel.

a.

Dew Point Alarm: Functions when line pressure dew point rises above 4 (C (39 (F) at 380 kPa (55 psi).

3.

Vacuum Pump Malfunction Alarm: Pump system receives the following individual signals and sends a single consolidated pump malfunction alarm signal to master alarm.

a.

High Temperature Shut down Alarm: Functions when exhaust air temperature exceeds 104 (C (220 (F), shutting down affected pump.

b.

Lead Pump Fails to Start Alarm: Functions when lead pump fails to start when actuated causing lag pump to start.

c.

Lag Pump In Use Alarm: Functions when the primary or lead vacuum pump in incapable of satisfying the demand. When three or more vacuum pumps are part of the system, the lag pump in use alarm shall energize when the last vacuum pump has been signaled to start.

4.

Waste Anesthetic Gas Disposal (WASG) Lag in Use Alarm: Provide when a central WAGD system is used. The signal shall be manually reset.

5.

Instrument Air Dew Point High: Functions when the line pressure dew point is greater than -30 (C (-22 (F).

C.

Master Alarm Functions: Provide the following individual alarms at the master alarm panel.

1.

Oxygen Alarms:

a.

Liquid oxygen low level alarm: Functions when stored liquid oxygen reaches a predetermined minimum level.

b.

Reserve switchover alarm: Functions when, or just before, reserve oxygen supply goes in operation.

c.

Reserve low supply alarm: Functions when contents of cylinder reserve oxygen supply are reduced to one day's average supply; switch and contacts at the bulk tank control panel.

d.

Reserve low pressure alarm: Functions when the gas pressure available in the liquid reserve oxygen supply is reduced below the pressure required to function properly.

e.

Low pressure alarm: Functions when system pressure downstream of the main shutoff valve drops below 275 kPa (40 psi), plus/minus 14 kPa (2 psi); operated by pressure switch or transmitters.

f.

High pressure alarm: functions when system pressure downstream of main shutoff valve increases above 415 kPa (60 psi), plus/minus 14 kPa (2 psi) set points; operated by pressure switches or transmitters.

g.

Cylinder reserve pressure low: Functions when the content of a cylinder reserve header is reduced below one day’s average supply.

2.

Nitrous Oxide Alarms:

a.

Reserve switchover alarm: Functions when, or just before, secondary or reserve nitrous oxide supply goes in operation.

b.

Pressure alarms: Functions when system pressure downstream of main shutoff valve drops below 275 kPa (40 psi), plus/minus 14 kPa (2 psi) or increases above 415 kPa (60 psi), plus/minus 14 kPa (2 psi) set points; operated by pressure switches or transmitters.

c.

Cylinder reserve pressure low: Functions when the content of a cylinder reserve header is reduced below one day’s average supply.

3.

Nitrogen Alarms:

a.

Reserve switchover alarm: Functions when, or just before, secondary or reserve nitrogen supply goes in operation.

b.

Pressure alarms: Functions when system pressure downstream of main shutoff valve drops below 1310 kPa (190 psi), plus/minus 14 kPa (2 psi) or increases above 1510 kPa (220 psi), plus/minus 14 kPa (2 psi) set points; operated by pressure switches or transmitters. Coordinate exact values with the COR as they may be different depending upon location.

c.

Cylinder reserve pressure low: Functions when the content of a cylinder reserve header is reduced below one day’s average supply.

4.

Carbon Dioxide Alarms:

a.

Reserve Switchover Alarm: Functions when, or just before, secondary or reserve carbon dioxide supply goes in operation.

b.

Pressure Alarms: Functions when system pressure downstream of main shutoff valve drops below 275 kPa (40 psi), plus/minus 14 kPa (2 psi) or increases above 415 kPa (60 psi), plus/minus 14 kPa (2 psi) set points; operated by pressure switches or transmitters.

c.

Cylinder reserve pressure low: Functions when the content of a cylinder reserve header is reduced below one day’s average supply.

5.

Compressed Air Alarms:

a.

Medical air dew point high alarm: Functions when the line pressure dew point rises above 2 (C (35 (F) at 380 kPa (55 psi).

b.

Carbon Monoxide Alarm: Functions when the carbon monoxide levels rise above 10 parts per million; receives signal from the carbon monoxide monitor.

c.

Main Bank Filter Set Alarm: Functions when the pressure drop across filter set increases more than 14 kPa (2 psi) over that when filters are clean and new; operates by differential pressure switch or transmitters.

d.

Desiccant Prefilter Alarm: Functions when pressure across the filter increases more than 21 kPa ( 3 psi) over that when filters are clean and new; operates by pressure differential switch.

e.

Desiccant Post Filter Alarm: Functions when pressure drop across filter increases more than 21 kPa (3 psi) over that when filters are clean and new; operates by pressure differential switch.

f.

Desiccant Dryer Malfunction Alarm: Functions on any combination of failure of tower cycling and/or pressure dew point rise above 60 ⁰ C at 690 kPa (140 ⁰ F at 100 psi).

g.

Aftercooler High temperature Alarm: Functions when aftercooler discharge air temperature exceeds 38 ⁰ C (100 ⁰ F).

h.

Pressure Abnormal Alarm: Functions when system pressure downstream of main shutoff valve drops below 550 kPa (80 psi) (plus/minus gage or increases above 830 kPa (120 psi) (plus/minus 14 kPa (2 psi) set points; operated by pressure switch.

i.

Compressor Malfunction Alarm: Functions when compressor system control panel signals compressor thermal malfunction alarm, lead compressor fails to start alarm or high water level in receiver or separator (if so required) receives signal from system control panel.

j.

Low Lubricant Shutdown: For rotary screw compressors. Functions when lubricant level drops to a low point. Receives signal from compressor control panel.

k.

Instrument air dew point high alarm: Functions when the line pressure dew point rises above -30 (C (-22 (F) at 380 kPa (55 psi).

D.

Alarm Functions:

1.

Oxygen, nitrous oxide, carbon dioxide and compressed air alarms: Pressure alarms: Functions when pressure in branch drops below 275 kPa (40 psi), plus/minus 14 kPa (2 psi) or increases above 414 kPa (60 psi), plus/minus 14 kPa (2 psi) set points; operated by pressure switches or transmitters.

2.

Nitrogen alarms: Pressure alarms: Functions when pressure in branch drops below 1310 kPa (190 psi), plus/minus 14 kPa (2 psi) or increases above 1500 kPa (220 psi), plus/minus 14 kPa (2 psi) set points; operated by pressure switches or transmitters.

3.

Vacuum alarms: Low vacuum alarm: Functions when vacuum in branch drops below 40 kPa (12‑inches Hg); operated by vacuum switch.

4.

Vacuum alarms:

a.

Low vacuum alarm: Function when system vacuum upstream of main shutoff valve drops below 40 kPa (12 inches Hg); operated by vacuum switch.

b.

Filter differential pressure/back pressure alarm: Functions when discharge oil filter differential rises to set level, or when back pressure is sensed; receives signal from pump control panel.

c.

Laboratory vacuum pump malfunction.

E.

Alarm Panels:

1.

General: Modular design, easily serviced and maintained; alarms operate on alternative current low voltage control circuit; provide required number of transformers for efficient functioning of complete system. Alarm panels shall be integral units, reporting // [insert special gas here], // compressed air and vacuum services, as required.

2.

Box: Flush mounted, sectional or one piece, corrosion protected. Size to accommodate required number of service functions for each location, and for one audible signal in each box. Anchor box securely. Provide spare capacity to accommodate 50% of the number of provided alarm points.

3.

Cover plate: Designed to accommodate required number of signals, visual and audible, for each location, and containing adequate operating instructions within the operator's view. Bezel shall be extruded aluminum, chromium plated metal, or plastic. Secure to the box with chromium plated or stainless steel countersunk screws.

4.

Service indicator lights: Red translucent plastic or LED with proper service identification inscribed thereon. Number of lights and service instruction shall be as required for each location. Provide each panel with a green test button of the same material, inscribed with "PUSH TO TEST" or similar message.

5.

Audible signal: Provide one in each alarm panel and connect electrically with all service indicator light functions.

6.

Controls:

a.

Visual signal: When the condition occurs which any individual service indicator light is to report, button for particular service shall give a lighted visual signal which cannot be canceled until such condition is corrected.

b.

Audible signal: Alarm shall give an audible signal upon circuit energization of any visual signal. Audible signal shall be continuous until silenced by pushing a button. This shall cancel and reset audible only, and not affect the visual signal. After silencing, subsequent alarms shall reactivate the audible alarm.

c.

Signal tester: Test button or separate normal light shall be continuously lighted to indicate electrical circuit serving each individual alarm is energized. Pushing test button shall temporarily activate all visual signals and sound audible signal, thereby providing desired indications of status of system.

F.

Alarm Relay Interface Control Cabinet: Design cabinet to transfer the closed circuit alarm signals through relays to a set of terminals for monitoring signals at the ECC without interrupting the closed circuit system. Construct of 1.9 mm (14 gage) steel, conforming with NEMA ICS‑6, Type 1, enclosures. Provide both normally open and normally closed contacts for output signals, with number of circuits required for full alarm capability at the ECC. Refer to Section 23 09 23, DIRECT-DIGITAL CONTROL SYSTEM FOR HVAC for compatibility.

G.

Alarm Network Communication: Network communications board shall be installed in local alarm and connected to the facility’s Ethernet. Local alarm modules shall send information to the master alarm and the data can be downloaded thru the computer connected to the facility’s Ethernet. Master alarm displays the message, sound its alarm and saves the information in an event log. This event log shall be downloaded to a computer file for tracking data and troubleshooting.

2.11 PRESSURE SWITCHES

General purpose, contact or mercury type, allowing both high and low pressure set points, with contact type provided with a protective dust cover; adjustable range set by inside or outside adjustment; switches activate when indicated by alarm requirements. Use one orifice nipple (or DISS demand check valve) for each sensor or pressure switch.

2.12 NITROGEN CONTROL PANEL (NCP)

A.

General: For nitrogen service, consisting of a line pressure control regulator, outlet line pressure gage, DISS service outlet, and supply valve, assembled and rigidly mounted in a roughing‑in assembly, and provided with a metal cover plate. Panel shall be designed to deliver 10 L/s (20 SCFM) at 1535 kpa (223 psi). Unit may be recessed wall mounted or integral with the articulating arm or column with individual regulators for each outlet.

B.

Manifold Assembly: Mounted to a steel support bracket, factory assembled and tested, ready for installation in the roughing‑in assembly.

1.

Supply valve, bronze bodied, double seal, full flow, ball type, designed for working pressure in excess of 1700 kPa (300) psi, with chrome plated brass ball which seals in both directions, requiring only a quarter turn of the knob from open to closed position.

2.

Line pressure control regulator, self‑relieving, diaphragm type, with high‑flow precision adjustment and working pressure in excess of 1700 kPa (250 psi).

3.

Line pressure gage, to monitor the gas outlet line pressure, calibrated from 0 to 2000 kPa (300 psi) in increments of 100 kPa (10 psi).

4.

Nitrogen service outlet, DISS type as specified under Article, STATION OUTLETS, with a self‑sealing dust plug, having a working pressure of 1700 kPa (250 psi) maximum.

5.

Two 146 mm (5‑3/4 inch) lengths of 10 mm (3/8‑inch) outside diameter type "K" copper tubing for connection to gas service supply line and to remote outlet line.

C.

Roughing‑In Assembly: Designed for recessed installation, consisting of a prime painted steel fabricated back box with mounting flanges on all four sides, with provisions to securely anchor the back box to wall construction. Equip with a crossover "U" tube to facilitate testing of the nitrogen system prior to the manifold installation, and a plaster shield to prevent dust or other foreign matter from contaminating internal parts prior to final assembly.

D.

Cover plate Assembly: Chromed cast metal or NAAMM Number 4 satin finished stainless steel panel with provisions for line pressure gage(s), nitrogen outlet, regulator and supply valve knobs, attaching directly to the roughing‑in assembly by means of four Number 6 ‑ 32 by 40 mm (1‑1/2 inch) long mounting screws, with plaster adjustments up to 20 mm (3/4 inch).

l be part of manifold control.

2.13 AIR COMPRESSOR SYSTEMS

A.

System Design: The laboratory air system shall be of a modular base mounted design consisting of multiplexed compressor, dryer/control, and an air receiver. Each unit must be fully compliant with the latest edition of NFPA 99.

B.

Compressors: Continuous duty rated “oil-less” type with permanently lubricated, sealed bearings. Single stage design, air cooled, reciprocating type with corrosion resistant reed type valves with stainless steel reeds. Both the compression rings and rider rings shall be made from a long life, fluororesin material designed for continuous duty operation. The crankshaft shall be constructed of a durable nodular graphite cast iron and designed to be fully supported on both ends by heavy duty ball bearings permanently lubricated and sealed. The crankcase shall be constructed of gray cast iron. Maximum heat dissipation shall be achieved through cast aluminum alloy cylinders treated for optimum corrosion and wear resistance. Cylinder sleeves shall not be required. Additionally, heat transmission from the piston wall to the piston pin needle bearing shall be minimized by an insulated “heat cut” piston pin. The connecting rod shall be of a one piece design for maximum reliability.

C.

Compressor Drive and Motor: V-belt driven through a combination flywheel/sheave and steel motor sheave with tapered bushing and protected by an OSHA approved, totally enclosed belt guard. Belt tensioning shall be achieved by a pivoting motor mounting base that is fully adjustable through twin adjusting screws. The motor shall be a NEMA rated, open drip proof, 1800 RPM, with 1.15 service factor suitable for 208/230/460V electrical service, a specified.

D.

Intake Piping: Provide a pre-piped intake manifold with one “hospital type” inlet air filter with threaded opening for remote intake connection. Isolate filter housing from the intake manifold with a braided 304 stainless steel flex connector.

E.

Discharge Piping: Provide an integral air cooled aftercooler designed for a maximum approach temperature of 12 degrees F complete with moisture separator and timed automatic solenoid drain valve with a manual drain value by-pass. Provide each cylinder head with a pre-wired high discharge air temperature shutdown switch. Include a flex connector, safety relief valve, and check valve. The compressor discharge line the piping shall be of ASTM B-819 copper tubing, brass, and/or stainless steel. The discharge flex connector shall be braided 304 stainless steel, brass or bronze.

F.

Isolation System: Isolate the compressor and monitor from the main compressor module base by means of a four point, heavy duty, spring isolation system for a minimum of 95% isolation efficiency.

G.

Dryer/Control: The dryer/control shall include a NEMA 12, U.L. labeled control system, duplexed desiccant drying system, duplexed final line filters, duplexed final line regulators, and combination dew point/CO monitor. All of the above shall be pre-wired and pre-piped in accordance with NFPA 99 and include valving to allow complete air receiver by-pass, as well as air sampling port.

H.

Dryer: Size each desiccant dryer for the peak calculated demand and capable of producing 10 (F (-12 (C) pressure dew point. Dryer purge flow shall be minimized through an on-demand purge saving control system. Include a mounted prefilter rated for 0.01 micron with automatic drain and element change indicator on the inlet of each dryer.

I.

Control System: Mounted and pre-wired control system shall be NEMA 12 and U.L. labeled. This control system shall provide automatic lead/lag sequencing with circuit breaker disconnects for each compressor with external operators, one non-fused main disconnect with external operators, full voltage motor magnetic starters with overload protection, redundant 120V control circuit transformers, visual and audible reserve unit alarm with isolated contacts for remote alarm, hand-off-auto (HOA) lighted selector switches, automatic alternation of both compressors with provisions for simultaneous operation if required, automatic activation of reserve unit if required, visual alarm indication for high discharge air temperature shutdown with isolated contacts for remote alarm, and duplexed run time hour meters.

J.

Final Line Filters and Regulators: Fully duplexed final line filters rated for 0.01 micron with element change indicators shall be factory mounted and pre-piped, along with duplexed factory mounted and pre-piped final line regulators and duplex safety relief valves.

K.

Dew Point Hygrometer/CO Monitor: Mounted, pre-piped and wired, combination dew point hygrometer/CO monitor shall be of the ceramic type with integral chemical type CO sensor. System accuracy shall be + 2 (F for dew point and 2PPM (at 10 PPM) for carbon monoxide. Dew point alarm shall be factory set at 39 (F (4 (C) per NFPA 99, and the CO alarm shall be factory set at 10 PPM. Both set points shall be field adjustable.

L.

Air Receiver: Vertical air receiver, galvanized, ASME Coded, National Board Certified, rated for minimum 150 PSIG design pressure and includes a sight gauge glass as well as a timed automatic solenoid drain valve. Provide three valve bypass on supply.

M.

Example of an acceptable product and manufacturer: Beacon Medical Products “Lifeline Medical Air Systems”.

2.14 pressure Regulators:

A.

For 690 kPa (100 psi) regulator, provide duplex in parallel, valve for maintenance shut-down without service interruption. For additional pressures, locate regulators remote from compressor near point of use, and provide with isolation valves and valve bypass.

1.

For systems 5 L/s (10 scfm) and below: Brass or bronze body and trim, reduced pressure range 170 – 850 kPa (25 – 125 psi) adjustable, spring type, diaphragm operated diaphragm operated, relieving. Delivered pressure shall vary not more than one kPa (0.15psi) for each 10 kPa (1.5psi) variation in inlet pressure.

2.15 EMERGENCY LOW PRESSURE OXYGEN INLET

A.

The Low Pressure Emergency Oxygen Inlet provides an inlet for connecting a temporary auxiliary source of oxygen to the oxygen pipeline system for emergency or maintenance situations per NFPA 99.

B.

The inlet consist of a 1" (25 mm) ball valve, pressure gauge and a 1/2"/1" NPTF connection housed in a weather tight enclosure. The enclosure is labeled "Emergency Low Pressure Gaseous Oxygen Inlet", and includes a padlock staple to prevent tampering or unauthorized access. The enclosure is suitable for recess mounting on the exterior of the building being served. The enclosure is 14 gauge, cold rolled steel with a primer coat of paint. The Emergency Oxygen Inlet is connected at a point downstream of the main supply line shutoff valve.

C.

Check valves are provided for installation in the emergency supply line and 'in the main supply line between the main line shutoff valve and the emergency supply line connection per by NFPA 99. Check valves have a cast bronze body and straight through design for minimum pressure drop.

D.

The check valves for sizes under 3" (76 mm) are soft seated, bubble tight, self aligning, and spring loaded, and ball type check valves. Three inch (76 mm) check valves are hard seated, spring loaded, self aligning ball type checks with cone seats (3" valves may not be "bubble tight"). Check valves are fast acting.

E.

A relief valve is provided for installation in the emergency supply line per NFPA 99. The relief valve has a brass body, single seat design, and is cleaned for oxygen use. It automatically reseats to provide a "bubble tight" seal after discharging excess gas. Pre-set at 75 psi.

PART 3 ‑ EXECUTION

3.1 INSTALLATION

A.

In accordance with current NFPA. Run buried oxygen piping in PVC protective pipe for entire length including enclosure of fittings and changes of direction.

B.

Install cast escutcheon with set screw at each wall, floor and ceiling penetration in exposed finished locations and within cabinets and millwork.

C.

Keep open ends of tube capped or plugged at all times or otherwise sealed until final assembly.

D.

Cut piping square and accurately with a tube cutter (sawing not permitted) to measurements determined at place of installation. Ream tube to remove burrs, being careful not to expand tube, and so no chips of copper remain in the tube. Work into place without springing or forcing. Bottom tube in socket so there are no gaps between tube and fitting. Exercise care in handling equipment and tools used in cutting or reaming of tube to prevent oil or grease being introduced into tubing. Where contamination has occurred, material is no longer suitable for oxygen service.

E.

Spacing of hangers: Current NFPA.

F.

Rigidly support valves and other equipment to prevent strain on tube or joints.

G.

While being brazed, joints shall be continuously purged with oil free nitrogen. The flow of purged gas shall be maintained until joint is cool to touch.

H.

Do not bend tubing. Use fittings.

I.

Support ceiling column assembly from heavy sub-mounting castings furnished with the unit as part of roughing‑in. Anchor with 15 mm (1/2‑inch) diameter bolts attached to angle iron frame supported from structural ceiling, unless otherwise indicated.

J.

Provide two 25 mm (1 inch) minimum conduits from ceiling column assembly to adjacent corridor, one for mass spectrometer tubing and wiring and one for monitor wiring, for connection to signal cabling network.

K.

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