SECTION 15482

MEDICAL GAS SYSTEMS

PART 1 GENERAL

SECTION INCLUDES

Medical oxygen gas system.

Medical compressed air system.

Medical vacuum system.

Nitrous oxide system.

Nitrogen system.

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section 01010 - Summary of Work:	Owner installed [oxygen tank] [______________].

Section [______ - ______]: Placement of [ceiling mounted outlets] [oxygen bulk storage facilities].

PRODUCTS INSTALLED BUT NOT FURNISHED UNDER THIS SECTION

Section 01010 - Summary of Work:	Owner furnished liquid oxygen bulk storage.

Section [_____ - __________]: Supply of [bottled medical gases] [integrated wall systems] for placement by this section.

RELATED SECTIONS

Section 02222 - Excavating. B.	Section 02223 - Backfilling.

Section [______] - Hospital Equipment: Prefabricated Patient Bedside Units.

Section 15190 - Mechanical Identification.

Section 15242 - Vibration Isolation.

Section 15260 - Piping Insulation.

Section 16141 - Wiring Devices.

Section 16180 - Equipment Wiring Systems.

ALLOWANCES

Cash Allowance: Include under provisions of Section [01019.] [________.]

Allowance includes purchase and delivery of bottled gases. Installation is included in this section and is part of the Contract Sum/Price.

Allowance includes cost of testing and certifying systems in accordance with cross connection tests.

REFERENCES

ANSI B16.18 - Cast Copper Alloy Solder-Joint Pressure Fittings.

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

ANSI B40.1 - Gauges, Pressure and Vacuum, Indicating Dial Type-Elastic Element.

ASME Boiler and Pressure Vessel Code.

ASTM A167 - Stainless and Heat-Resisting Chromium - Nickel Steel Plate.

ASTM A269 - Stainless and Welded Austentic Stainless Steel Tubing for General Service.

ASTM A403 - Wrought Austentic Stainless Steel Piping Fittings.

ASTM B32 - Solder Metal

ASTM B88 - Seamless Copper Water Tube.

ASTM B280 - Seamless Copper Tube for Air Conditioning and Refrigeration field Service.

ASTM D1785 - Poly (Vinyl Chloride) (PVC) Plastic Pipe, Schedules 40, 80, and 120.

ASTM D2466 - Poly (Vinyl Chloride) (PVC) Plastic Pipe and Fittings.

ASTM D2564 - Solvent Cements for Poly (Vinyl Chloride) (PVC) Plastic Pipe and Fittings.

AWS A5.8 - Brazing Filler Metal.

CGA G-7 - Compressed Air for Human Respiration.

CGA P-2.1 - Medical-Surgical Vacuum Systems in Health Care Facilities.

CGA V-5 - Diameter Index Safety System Non Interchangeable Low Pressure Connections for Medical Gas Applications.

FM - Factory Mutual System - Approval Guide.

FS TT-P-645 - Primer, Paint, Zinc Chromate, Alkyd Type.

FS W-C-596 - Electrical Power Connector, Plug, Receptacle, and Cable Outlet.

FS WW-V-35 - Valve Ball.

FS WW-V-54 - Valve, Gate, Bronze (125, 150 and 200 Pound, Screwed, Flanged, Solder End, For Land Use).

MIL-R-36557 - Regulator, Pressure, Medical Gas Administration Apparatus.

MIL-V-82026 - Valves, Diaphragm, Stop.

MSS SP-58 - Pipe Hangers and Supports - Materials, Design and Manufacture.

MSS SP-69 - Pipe Hangers and Supports - Selection and Application.

AA.	NEMA 250 - Enclosures for Electrical Equipment (1000 Volts Maximum).

AB. NFPA 50 - Bulk Oxygen Systems at Consumer Sites

AC. NFPA 99 - Standard for Health Care Facilities.

SUBMITTALS

Submit under provisions of Section [01300] [_____].

Shop Drawings: Indicate general assembly of components, mounting and installation details, and general layout of control and alarm panels. Submit detailed medical wall assembly drawings.

Product Data: Provide manufacturers literature and illustrations for all components indicating size, dimensions and configuration.

Samples:	Submit [two] [_____] of [each outlet] [each valve].

Independent Testing Agency Reports: Indicate systems are complete, zone valves installed, alarm systems functional, and pressure and cross connections tests performed. Document tests.

Manufacturer's Installation Instruction:	Indicate requirements for equipment and systems.

PROJECT RECORD DOCUMENTS

Submit under provisions of Section [01700] [_____].

Record actual locations of piping, valving, and outlets.

OPERATION AND MAINTENANCE DATA

Submit under provisions of Section [01700] [_______].

Operation Data: Include installation instructions, assembly views, lubrication instructions, and assembly views.

Maintenance Data: Include maintenance and inspection data, replacement part numbers and availability, and service depot location and telephone.

QUALITY ASSURANCE

Perform Work in accordance with [NFPA 99] [CGA P2.1] [_____].

Maintain [one] [_____] copy of [each] document on site.

QUALIFICATIONS

Manufacturer: Company specializing in manufacturing the products specified in this Section with minimum [three] [_____] years [documented] experience.

Installer: Company specializing in performing the work of this Section with minimum [_______] years [documented] experience.

Testing Laboratory: Company specializing in performing the testing of this Section with minimum [_______] years [documented] experience.

REGULATORY REQUIREMENTS

Conform to [applicable] [_______] code for medical gas systems.

Provide certificate of compliance from authority have jurisdiction [_______] indicating approval of systems.

MOCKUP

Provide mockup of typical medical wall unit under provisions of Section [01400] [__________________].

Mockup may [not] remain as part of the Work.1.14DELIVERY, STORAGE, AND HANDLING

Delivery, store, protect and handle products to site under provisions of Section [01600] [_____].

Accept material on site in factory containers and packing. Inspect for damage.

Protect from damage and contamination by maintaining

factory packaging and caps in place until installation.

SCHEDULING

Schedule work under the provisions of Section [01300] [_____].

Schedule Work to ensure equipment is installed and systems tested and certified prior to substantial completion.

EXTRA MATERIALS

Furnish under provisions of Section [01700] [________].

Provide [two] [____] of [each size of valve] [________].

PART 2 PRODUCTS

MANUFACTURERS

[_____________________________] Product [____________].

[_____________________________] Product [____________].

[_____________________________] Product [____________].

Substitutions: Under provisions of Section [01600] [____].

PIPE AND FITTINGS

Factory Preparation:	Wash inside of copper pipe and copper fitting with hot solution of sodium carbonate or trisodium phosphate mixed on pound to 3 gallons (one kg to 25 L) of water; rinse with water, and blow dry with oil-

free dry nitrogen or compressed air.

Oxygen, Compressed Air, Nitrous Oxide, Nitrogen, Systems, Abovegrou-nd:

Copper Tube:	[ASTM B88, Type K, hard drawn] [ASTM B280, Type ACR-Oxy].

Fittings: ANSI B16.18, cast bronze, or ANSI B16.22, wrought copper.

Joints: AWS A5.8, BCuP silver braze.

Oxygen, Compressed Air, Nitrous Oxide, Nitrogen, Systems, Buried:

Copper Tube: ASTM B88, Type K, annealed.

Fittings: ANSI B16.18, cast bronze, or ANSI B16.22, wrought copper.

Joints: AWS A5.8, BCuP silver braze.

Vacuum and Anesthesia Gas Evacuation Systems, Aboveground:

Copper Tube:	[ASTM B88, Type L, hard drawn] [ASTM B280, Type ACR-Oxy].

Fittings: ANSI B16.18, cast bronze, or ANSI B16.22, wrought copper.

Joints: AWS A5.8, BCuP silver braze [or ANSI/ASTM B32, Solder, Grade 95TA].

Vacuum and Anesthesia Gas Evacuation Systems, Buried:

Copper Tube: ASTM B88, Type L, Annealed.

Fittings: ANSI B16.18, cast bronze, or ANSI B16.22 wrought copper.

Joints: AWS A5.8 BCuP silver braze [or ANSI/ASTM B32, Solder, Grade 95 TA].

Oral Evacuation Systems:

PVC Pipe: ASTM D 1785, PVC 1120 or 1220, Schedule 40.

Fittings: ASTM D 2466, PVC long radius or wye type.

Joints: ASTM D2564, solvent cement.

VALVES

Factory Preparation:	For oxygen service disassemble and wash in hot solution of sodium carbonate or trisodium phosphate mixed one pound to 3 gallons (one kg to 25 L) of water, rinse with water, seal, and pack for shipping.

Ball Valves:	FS WW-V-35, brass or bronze body, double- seal ball valves with replaceable neoprene or teflon seat and stem seals, for minimum 300 psi (2070 kPa) working pressure, flange or union mounting, labelled for intended service; Model [_______] manufactured by [____________________].

Diaphragm Valves (Oxygen, Nitrous Oxide and Nitrogen): MIL-V-82026, brass-bodied, packless, diaphragm type with regrinding or renewable seats and disks, for minimum 300 psi (2070 kPa) working pressure; Model [_______] manufactured by [____________________].

Pressure Regulation Valves (Medical Air): MIL-R-36557; Model [_______] manufactured by [____________________].

Gate Valves (Vacuum, Medical Air, and Anaesthesia Gas Evacuation System): FS WW-V-54, Class A, Type I or Type II, Style 2 or 3, brass or bronze with solder ends; Model [_______] manufactured by [____________________].

Ball Valves (Oral Evacuation Systems Only): PVC body, double-seal ball valves with replaceable neoprene or teflon seat and stem seals, for minimum 100 psi (690 kPa) working pressure, designed especially for vacuum service; Model [_______] manufactured by [____________________].

PIPING

Hangers and Supports: MSS SP-58 with types as required by MSS SP-69.

Pressure Gages: ANSI B40.1, white dials and black lettering with restrictor.

Oxygen and nitrous oxide systems: Manufactured and labeled expressly for intended service; UL labeled.

Model [______] manufactured by [_______________].

Vacuum Bottle Brackets: Stainless steel, chrome-plated metal, or aluminum with finish matching adjacent outlet.

Flexible Connectors:	Corrugated flexible, single ply, seamless or seam-welded tubing of stainless steel or bronze or reinforced teflon bellows or hose.

Valve Cabinets:

[Extruded aluminum] [Stainless steel] [Galvanized sheet steel], flush-mounted and rigidly assembled to accommodate valves and fittings, punched or drilled sides to receive tubing, anchors to secure to wall construction.

Cover Plates: [Extruded aluminum] [Stainless steel] Galvanized sheet steel], with replaceable plastic windows with pull ring to remove window.

Cabinet Labels: Labelled and color coded for intended service and area served.

Valves: Pre-assemble and mount chrome plated valves and tubing extensions.

Gages: Provide where indicated and in [O.R.] [intensive care] areas downstream of isolating valves

Model [______] manufactured by [_________________].

Piping Identification: Pressure sensitive adhesive tape and decals, color and labelling to conform with Section 15190.

OUTLETS

Outlet Units: [CGA V-5, Diameter - Index Safety System (DISS)] [NFPA 99] non-interchangeable connectors, automatic valves, secondary check valves (except vacuum and evacuation outlets), and capped 3/8-inch tubing stubs for supply connections, color coded and labelled for intended service; Model [_______] manufactured by [____________________].

Wall Outlets: Flush mount in galvanized steel boxes with stainless steel or chrome-plated brass faceplates; Model [_______] manufactured by [____________________].

Fixed Column Ceiling Outlets: Mount on fixed columns fabricated of stainless steel with removable access panels; Model [_______] manufactured by [____________________].

Flush Mounted Ceiling Outlets: Mount in galvanized steel boxes with stainless steel or chrome plated brass faceplates with color coded hoses with connectors at top and bottom, automatic valve at hose outlet connector; Model [_______] manufactured by [____________________].

Electrical Convenience Receptacles: Refer to Section 16141.

Recessed Nitrogen Service Cabinet: Line pressure control regulator, two line pressure gages for monitoring inlet and outlet lines, nitrogen service outlet (DISS) and supply valve; assembled and rigidly mounted in galvanized steel roughing-in assembly with stainless steel cover plate imprinted with control identification and operating instructions; Model [_______] manufactured by [____________________].

Retractable Surgical Service Ceiling Column:	Manually operated type consisting of upper section for rigid mounting at ceiling level and counter-balanced telescoping lower section with fail proof stops.

Equip with handle and release lever to lock in any position from fully extended to fully extracted.

Support from heavy mounting castings equipped with gas service connections.

Provide flexible gas hose assemblies connecting between service outlets and roughing-in with DISS connections.

Provide access panels to allow inspection of interior column fittings.

Equip with flush type safety keyed non-interchangeable quick disconnect type service outlets mounted on underside telescoping section, consisting of [one] [____] oxygen, one nitrous oxide, one air, one nitrogen, two vacuum, three duplex electrical convenience receptacles, three ground receptacles.

Accessory parts shall be chrome plated or stainless steel.7.Model [_______] manufac-tured by [_______-

________-_____].

Rigid Ceiling Column for Recovery and Emergency Areas: Approximately 10 inches (250 mm) square, of stainless steel with chrome plated accessory parts.

Provide mounting plate, full length stainless shroud and access panel, ceiling finishing ring, adjustable inner frame and head assembly.

Equip with flush type safety keyed non-interchangeable quick disconnect [DISS] type service outlets consisting of two oxygen, three vacuum and one air outlet installed on front and sides, four adjustable height I.V. hooks on two sides of column and four rotatable adjustable height vacuum equipment slides on each corner of column, three duplex electrical convenience receptacles, three ground receptacles, and blank face plate for nurses call station.

Model [____] manufactured by [__________].

Modular Rigid Surgery Column: Stationary rigid type with stainless steel shroud, full length access panel, modular design.

Equip with flush type safety keyed non-interchangeable quick disconnect [DISS] type service outlets consisting of [____] oxygen, [____] nitrous oxide, [____] vacuum, [____] air, [_____] nitrogen, [_____] evacuation, [_____] carbon dioxide.

Model [_____] manufactured by [_______________].

NITROUS OXIDE MANIFOLD

Central Supply of Nitrous Oxide:	Duplex automatic manifold consisting of wall mounted control cabinet and necessary header connections and pigtails for [____] cylinders, arranged for [_____] cylinders in service and [______] cylinders in reserve.

Manifold Delivery: Maximum [220] [____] cu ft/hr ([62] [____] cu m/hr) nitrous oxide continuously at [50] [____] psig ([345] [____] kPa). Provide automatic changeover from primary to secondary bank and allow replacing depleted cylinders with no change in line pressure.

By-Pass System: Between regulators to service regulator or switch over system without interrupting supply of gas. Bleed valves piped to vent connector within cabinet shall allow adjustment of pressure reducing regulators.

Cabinet:	House components in lockable cabinet with baked enamel finish.

Three front mounted gages indicate bank and hospital line pressures.

Green indicator light indicates service bank in use.

Red indicator light indicates reserve bank in use.

Provide terminal block connections for remote alarms.

Model: [_______] manufactured by [___________________].

NITROGEN MANIFOLD

Duplex Nitrogen Manifold: Consist of wall mounted control cabinet and necessary header connection and pigtails for [____] cylinders. Arrange controls to have half of cylinders in service and half in reserve.

Manifold Delivery: Maximum [220] [____] cu ft/hr ([62] [____] cu m/hr) nitrogen continuously at [180] [____] psig ([1240] [____] kPa). Provide automatic changeover from primary to secondary bank and allow replacing depleted cylinders with no change in line pressure. Provide bank regulators to reduce cylinder pressure for line regulator set at [160] [____] psig ([1100] [____] kPa) delivery pressure. Provide manifold relief valve set at [240] [____] psig ([1650] [____] kPa).

By-Pass System: Between regulators to service regulator or switch over system without interrupting supply of gas. Bleed valves allow adjustment of pressure reducing regulators.

Cabinet:	House components in lockable cabinet with baked enamel finish.

Three front mounted gages indicate bank and hospital line pressures.

Green indicator light indicates service bank in use.

Red indicator light indicates reserve bank in use.

Provide terminal block connections for remote alarm.

Model [_______] manufactured by [____________________].

MEDICAL COMPRESSED AIR SYSTEM

Duplex Air Compressor System:

To deliver CGA G-7 compressed air.

Rotary Oil Free Liquid Ring Compressors:	Equipped with check valve, inlet and outlet flexible connector, isolation valve, safety relief valve, air by-pass solenoid valve, water air separator, float trap, strainer, compound gage, solenoid valve, bypass solenoid valve and metering valve for service liquid, inlet mufflers, motor coupling with guard.

****** [OR] ******

Reciprocating Compressor: Cast iron housing and head, heat treated forged steel or ductile iron shaft, aluminum alloy connecting rods, automotive type pistons with rings, alloy suction and discharge valves, and oil immersed sealing surfaces. Statically and dynamically balance rotating parts. Provide reversible oil pump lubrication system to ensure adequate lubrication during starting, stopping, and normal operation.

Capacity: [_____] cfm ([_____] L/s) at [_____] psig ([_____] kPa).

Electrical Characteristics:

[____] hp ([____] kW).

[____] volts, [single] [three] phase, 60 Hz.

Refrigerated Air Dryer: Non-cycling hermetic type with capacity of [_____] cfm ([_____] L/s) capable of drying 100 psig (690 kPa) at 100 degrees F (38 degrees C) saturated air to 35 degrees F (1.6 degrees C) dew point at 100 degrees F (38 degrees C) ambient, with automatic drain trap, three valve by-pass system, [_____] hp ([_____] kW) motor and safety disconnect switch in NEMA 250 Type 1 general purpose enclosure, wired from compressor controller.

Duplex Controller: Pre-wired in NEMA 250 Type 12 enclosure with fusible disconnects, magnetic motor starters with overload protection, control circuit transformers, clock timer, automatic water and air by-pass circuits, pressure switches, hand-off automatic selector switches mounted in cabinet cover, and safety disconnect door.

Receiver: [_____] gallon ([_____] L) [vertical] [horizontal] welded steel ASME SEC 8 receiver, prime coated with vinyl lining, with gage, safety relief valve, and automatic tank drain.

Air Line Filter Regulator: Regulating assembly with line pressure adjusting knob, 2 inch (50 mm) diameter line pressure gage, 1-1/4 inch (40 mm) pipe size connections, clear polycarbonate collection bowl with 5 micron filter unit and automatic drain.

Model [_______] manufactured by [____________________].

MEDICAL VACUUM SYSTEM

Duplex Vacuum Pump:

Rotary Liquid Ring Pumps: Tank mounted, each equipped with check valve, inlet flexible connector, water separator, strainer, compound gage, solenoid valve and metering valve for service liquid, exhaust muffler, motor coupling with guard.

****** [OR] ******

Reciprocating Pump: Cast iron construction with rotor mounted on stainless steel shaft supported by two external grease lubricated ball bearings enclosed in packed stuffing boxes.

Capacity: [_____] cfm ([_____] L/s) expanded air at [_____] psig ([_____] kPa), capable of producing maximum vacuum of [_____] inches hg ([_____] kPa).

Electrical Characteristics:

[____] hp ([____] kW).

[____] volts, [single] [three] phase, 60 Hz.

Electrical Controls:	Pre-wired in NEMA 250 Type 12 enclosure, with fusible disconnects, magnetic motor starters, overload protection with manual reset, control circuit transformers, automatic alternators, vacuum control switches, hand-off automatic switches in cabinet cover, and safety disconnect door.

Receiver: [_____] gallon ([_____] L) [vertical] [horizontal] welded steel ASME SEC 8 receiver, prime coated with vinyl lining, with gage, safety relief valve, and automatic tank drain.

Model [_______] manufactured by [____________________].

ANESTHESIA GAS EVACUATION PUMPS

Conform with Medical Vacuum System.

Exception: Pumps suitable for handling flammable gases.

Capacity: [_____] cfm ([_____] L/s), capable of producing vacuum of [_____] inches hg ([_____] kPa).

Electrical Characteristics:

[____] hp ([____] kW).

[____] volts, [single] [three] phase, 60 Hz.

Receiver: [_____] gallon ([_____] L) [vertical] [horizontal] welded steel ASME SEC 8 receiver, prime coated with vinyl lining, with gage, safety relief valve, and automatic tank drain.

Model [_______] manufactured by [____________________].

ORAL EVACUATION PUMPS

Pump:

Type: Multi-stage turbine with direct connected electric motor drive.

Capacity: [_____] cfm ([_____] L/s), capable of producing vacuum of [_____] inches hg ([_____] kPa).

Electrical Characteristics:

[____] hp ([____] kW).

[____] volts, [single] [three] phase, 60 Hz.

Surge Control and Silencer: Automatic modulating control responding to motor current, bleeds air into turbine when system operates at less than 50 percent capacity, with baffled, sound-absorbent, line muffler.

Separators: Welded galvanized steel with factory applied corrosion preventative lining with float switches, drain pumps, sediment strainers, ball floats, quick opening springs, flushing water supply globe valves, disinfectant funnels and cocks, cleanout openings, tangential intakes, and high level float cutout switch.

Receiver: [_____] gallon ([_____] L) vertical welded steel ASME SEC 8 receiver, prime coated with vinyl lining, with gage, safety relief valve, and automatic tank drain.E.Model [_______] manufactured by [____________________].

OXYGEN MANIFOLD

Duplex Automatic Manifold: Consisting of wall mounted control cabinet and necessary header connections and pigtails for [_____] cylinders, arranged for [_____] cylinders in service and [_____] cylinders in reserve.

Delivery: Maximum [220] [____] cu ft/hr ([62] [____] cu m/hr) oxygen continuously at [50] [____] psig ([345] [____] kPa). Provide automatic changeover from primary to secondary bank and allow replacing depleted cylinders with no change in line pressure.

By-Pass System: Locate between regulators to service regulator or switch over system without interrupting supply of gas. Pipe bleed valves to vent connector within cabinet to allow adjustment of pressure reducing regulators.

Cabinet:	House components in lockable cabinet with baked enamel finish.

Three front mounted gages: Indicate bank and hospital line pressures.

Green indicator light:	Indicate service bank in use.

Red indicator light: Indicate reserve bank in use.

Terminal block: Connections for remote alarms.

LIQUID OXYGEN STORAGE TANK

Inner Container:	ASTM A167, Type 304, welded stainless tank conforming with ASME SEC 8, ASME labelled for

pressure rating of [_______] psig ([_____]kPa).

Outer Shell:	Welded carbon steel conforming with ASME SEC 8, with collapse rating of [_____] psig ([_____] kPa).

Insulation: Insulate annular space sufficient to insure maximum leak evaporation of [_____] pound ([_____] kg) of oxygen per 24 hours. Insulation shall not spark or burn when touched with glowing platinum wire in pure oxygen atmosphere.

Supports: Adequate for installed and loaded forces of 1- 1/2 times gravity vertical and 1/2 times gravity horizontal and for shipping empty, 3 times gravity.

Valves and Fittings:	Conform with NFPA 50 and ASME SEC 8, with:

Manway and cap.

Liquid level gage.

Inner container pressure gage, by-pass valve, vent valve.

95 percent tri-cock valve and gage valve.

Thermocouple valve gage tube and thermocouple

Inner container relief valve, psig ([_____]kPa) setting.

Inner container bursting disc, [_____] psig ([_____] kPa) rating.

Bottom fill valve.

Vent valve.

Inlet bleed valve.

Liquid fill connection.

Inlet line relief valve, [_____] psig ([_____] kPa) setting.

Evaporating coil [_____] gpm ([_____] L/sec) at [_____] psig ([_____] kPa).

Annular space evacuation valve, evacuation filter, [_____] sq in ([_____] sq cm).

Pressurizer valve.

Liquid withdrawal valve.

Liquid-to-pump valve.

Pump vapor return valve.

Outer shell O-ring relief valve.

Pipe and Fittings: ASTM A269, Type 304, stainless steel pipe and ASTM A403 welding fittings; screwed or flanged valve, gage, and equipment joints.

Tank Finish:	Commercial sand blast clean and finish with FS TT-P-645 primer coat and exterior white with green color code enamel finish.

ALARM SYSTEM

High-Low Pressure Alarm Panels: Closed circuit, self- monitoring type, to monitor oxygen, compressed vacuum, air nitrous oxide, and nitrogen.

Green light for systems normal.

High or low pressure warning:

Green light extinguishes.

Audible warning device sounds.

Red light energizes.

Gage indicates pressure or vacuum.

Switch silences warning device.

Test switch to test light bulbs and audible warning device.

Provide system with internal switches, gages, control unit, and transformer.

Multi-Signal Alarm Panel: Closed circuit, self-monitoring type, to monitor oxygen, vacuum, compressed air, nitrous oxide, and nitrogen piping systems pressure or liquid level.

Green light for systems normal.

For abnormal condition:

Green light extinguishes.

Audible warning device sounds.

Red light energizes.

Switch silences warning device.

Test switch to test light bulbs and audible warning device.

Design system such that one, two or more monitors may be connected to a single pressure switch.

Model [_______] manufactured by [____________________].

Monitor following abnormal conditions.

Oxygen reserve supply in use.

Oxygen line pressure high.

Oxygen line pressure low.

Air line pressure high.

Air line pressure low.

Air lag pump on.

Vacuum line pressure above normal.

Vacuum line pressure below normal.

Vacuum lag pump on

Nitrous oxide reserve supply in use.

Nitrous line pressure high.

Nitrous line pressure low.

Nitrogen reserve supply in use.

Nitrogen line pressure high.

Nitrogen line pressure low.

High-low pressure switch: Dual circuit with two single pole, double throw, snap action switches, tested at [180] [____] psig ([1240] [____] kPa) with adjustable range of [4] [____] psig ([26] [____] kPa), preset at [40] [____] psig ([276] [____] kPa) and [60] [____] psig ([414] [____] kPa).

Vacuum switch: [______________].

Nitrogen switches: [_______________].

PART 3 EXECUTION

INSTALLERS

[______________________________].

[______________________________].

[______________________________].

INSTALLATION

Install in accordance with manufacturer's instructions and NFPA 99.

Pre-Installation Cleaning: Disassemble positive pressure gas systems pipe, fittings, valves, and components, except those supplied cleaned and prepared for intended service, and thoroughly wash in hot solution of sodium carbonate or trisodium phosphate mixed 1 lb to 3 gal (1 kg to 25 L) of water. After washing, rinse with water, dry and cap until installation.

Braze joints in pipe and tubing.	Avoid leaving excess flux inside of pipe and fittings. During brazing of pipe connections, purge interior of pipe continuously with nitrogen.

Effect changes in size with reducing fittings. Make changes in direction of required turns or offsets with fittings or tubing shaped by bending tools. Make bends free of flattening, buckling or thinning of tube wall.

Cut pipe and tubing accurately and install without springing or forcing.

Install exposed oxygen piping in wall-mounted sheet steel raceways and junction boxes.

Encase buried oxygen piping in cast-iron pipe. Provide with FM listed heat trace with fixed temperature regulation, set for 80 degrees F (27 degrees C) maximum, and terminating at junction box, mounted near main oxygen supply shut-off valve. Insulate buried oxygen lines and heat trace with insulation as specified in Section 15260.

Grade piping down in direction of flow.

Provide pipe sleeves where pipes and tubing pass through walls, floors, roofs, and partitions. Finish flush at both ends. Extend 2 inches above finished floors. Pack space between pipe or tubing and sleeve, and calk.

Identify piping with tape and decals. Provide piping identification code and schematic. Refer to Section 15190. Install labelling on pipe at intervals of not more than 20 feet (6 meters) and at least once in each room and each story traversed by pipeline.

Excavate and backfill pipe trenches as specified in Section 02222 and Section 02223. Coordinate provision of utility warning and identification tape with backfill operation. Provide above all buried lines at a depth of 8 to 12 inches below finish grade.

Support gas piping with pipe hooks or hangers suitable for size of pipe, spaced:

1/2 inch (13 mm) pipe or tubing: 72 inches (1830 mm).

3/4 inch (20 mm) or one inch (25 mm) pipe or tubing: 96 inches (2440 mm).

1-1/4 inches (30 mm) or larger (horizontal):	120 inches (3050 mm).

1-1/4 inches (30 mm) or larger (vertical): every floor level.

Install underground piping in trench minimum 42 inches (1070 mm) deep adequately protected against physical damage and corrosion, or in ducts and tunnels which are not occupied by fuel oil lines and are vented.

Install isolation valves adjacent to main lines for risers if manual shut off valves (zone control valves) are more than 15 feet (4.5 meters) from main or riser. Installed lateral lines feeding shut off valves.

Locate immediately adjacent to main or riser.

Ensure not accessible to unauthorized personnel.

Identify gas and function.

Leave in open position with handle removed or sealed.

Except where indicated or in flush wall mounted cabinets, install manual shut off valves with stem vertical and accessible for operation and maintenance.

Install strainers on inlet side of pressure reducing valves. Provide main gas valves (pressure reducing or flow control) with by-passes and isolation valves to permit maintenance without interruption of gas.

Provide a valved by-pass around receivers.

Vibration and Noise Isolation:	Refer to Section 15242.

Medical Air Compressor Systems: Isolate systems including receivers, dryers, and filters until after completion and approval of purity tests for compressed air system. Tie- in at flange or union joint.

Provide medical air compressors and vacuum pumps with water supply piped from potable water system. Provide reduced pressure back flow preventer on water supply.

Install bulk liquid oxygen system to NFPA 50 and under supervision of manufacturer. [Size liquid oxygen tank's concrete foundation and tank anchoring for 3 times fully loaded weight.] Provide bulk liquid oxygen systems with shut-off valve and connection point with valve for portable emergency oxygen supply. [Install bulk oxygen to inlet side of oxygen manifold.]

Provide electric motor drive equipment with electrical equipment and wiring. Refer to Section 16180.

PIPING SYSTEMS CLEANING AND PRESSURE TESTING

After erection of pipe and tubing but prior to installation of service outlet valves, blow systems clear of free moisture and foreign matter with nitrogen gas.

Install service outlet valves, subject system to test pressure of 150 psig (1034 kPa) with nitrogen or dry compressed air. Check with soapy water. Provide 24-hour standing pressure test.

CROSS-CONNECTION TESTS

Testing Agencies:

[______________________________].

[______________________________].

[______________________________].

Independent testing agency to certify system is complete, zone valve installed, alarm systems functional, and test performed. Document tests and submit.

Reduce pressure in piping systems other than system under investigation to atmospheric.

Test system with dry compressed air or dry nitrogen with test pressure in piping system at 50 psig (345 kPa).

Check each station outlet of every piping system to determine test gas is dispensed only from outlet of system under investigation. Measure pressure with gage attached to specific adaptor. Do not use universal adaptors.

Disconnect test gas and connect proper gas to each system. Purge entire system to remove test gas. Check with analyzer suitable for gas installed.

END OF SECTION