Corpus sync: neutrality remakes, note hygiene, datasheet relocation, transformer-split cross-refs
---
title: Medical Gas and Vacuum Systems
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## Action Submittals {toc}
−### The Contractor shall submit the following action submittals for review before fabrication or ordering of material. {note}
+### The Contractor shall submit the following action submittals for review before fabrication or ordering of material.
- Shop drawings showing pipe routing, sizes, valve and outlet locations, zone boundaries, and alarm point assignments
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## Informational Submittals {toc}
−### The Contractor shall submit the following informational submittals documenting personnel qualifications. {note}
+### The Contractor shall submit the following informational submittals documenting personnel qualifications.
- ASSE 6010 certification for each installer who brazes or assembles medical gas piping
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## Closeout Submittals {toc}
−### The Contractor shall submit the following closeout submittals before the system is placed in service for patient care. {note}
+### The Contractor shall submit the following closeout submittals before the system is placed in service for patient care.
- Record drawings showing as-installed routing, valve and outlet locations, and zone boundaries
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### A high-pressure cylinder manifold serving a continuous-use gas shall be the automatic alternating type with primary and reserve banks.
−### An automatic alternating manifold shall switch from the depleted bank to the full bank without interruption of supply and without manual intervention.
−
−### Automatic changeover prevents an unattended depletion from interrupting a life-critical gas; the operator is alerted to change cylinders but supply continues uninterrupted. {note}
−
```datasheet
label: Manifold configuration
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```
+### An automatic alternating manifold shall switch from the depleted bank to the full bank without interruption of supply and without manual intervention.
+
+### Automatic changeover prevents an unattended depletion from interrupting a life-critical gas; the operator is alerted to change cylinders but supply continues uninterrupted. {note}
+
+### The cylinder capacity of each manifold header bank shall be specified, sized to sustain uninterrupted supply through the peak demand interval between cylinder changeouts.
+
```datasheet
label: Manifold header capacity per bank
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### The WAGD exhaust termination shall be located away from outside air intakes and architectural openings. [[drawing: WAGD exhaust termination location]]
−### WAGD exhaust termination conflicts with outside air intakes are a common late-stage problem requiring costly rerouting; the termination shall be coordinated with the HVAC and architectural disciplines early in design. {note}
+### WAGD exhaust termination conflicts with outside air intakes are a common late-stage problem requiring costly rerouting; the termination shall be coordinated with the HVAC and architectural disciplines early in design.
## Source Electrical {toc}
### Category 1 source equipment shall be connected to the essential electrical system per NFPA 99 and NFPA 110.
−### Connecting Category 1 compressors, vacuum pumps, or critical alarms to normal power only is a recurring coordination failure; the connection to the essential electrical system shall be confirmed on the panel schedules. {note}
+### Connecting Category 1 compressors, vacuum pumps, or critical alarms to normal power only is a recurring coordination failure; the connection to the essential electrical system shall be confirmed on the panel schedules.
```datasheet
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### Distribution piping shall be sized by the engineer of record using the NFPA 99 flow calculation method at peak demand.
−### Rule-of-thumb sizing leads to pressure-drop failures at peak demand, especially on vacuum systems where undersized mains starve distant inlets; the engineer shall submit flow calculations rather than rely on nominal sizing. {note}
+### Rule-of-thumb sizing leads to pressure-drop failures at peak demand, especially on vacuum systems where undersized mains starve distant inlets; the engineer shall submit flow calculations rather than rely on nominal sizing.
```datasheet
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## Zone Valve Boxes {toc}
−### Zone valve boxes provide a single accessible location where staff can shut off each gas serving a defined area; they shall be located where they are visible and reachable in an emergency. {note}
+### Zone valve boxes provide a single accessible location where staff can shut off each gas serving a defined area; they shall be located where they are visible and reachable in an emergency.
### A zone valve box shall be provided for each zone identified for the project. [[drawing: zone valve box locations]]
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### Master alarm signals shall be annunciated at not fewer than two locations, each continuously staffed or monitored.
−### Master alarm locations shall be selected so that a single event cannot disable all annunciation, such as the main monitoring station and the facility engineering office. {note}
+### Master alarm locations shall be selected so that a single event cannot disable all annunciation, such as the main monitoring station and the facility engineering office.
### The master alarm panel shall monitor source equipment status, reserve status, and main line pressures for each system.
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### All station outlets and inlets shall use a single connector type and indexing system facility-wide.
−### Mixing connector types between drawing sheets, or failing to match the existing facility standard, produces non-interchangeable outlets that force medical-equipment adapter changes; the connector type shall be confirmed against the facility standard before specifying. {note}
+### Mixing connector types between drawing sheets, or failing to match the existing facility standard, produces non-interchangeable outlets that force medical-equipment adapter changes; the connector type shall be confirmed against the facility standard before specifying.
```datasheet
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### Specifying only verify per NFPA 99 without defining scope leads to closeout disputes over which outlets, which gases, and who witnesses; the verification scope shall be defined completely. {note}
−### The independent verifier shall perform the following verification tests on the completed system. {note}
+### The independent verifier shall perform the following verification tests on the completed system.
- Standing pressure test of each system
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### Source equipment, manifold racks, compressors, vacuum pumps, and distribution piping shall be seismically braced in accordance with the building code and ASCE 7 for the facility seismic design category.
−### Seismic bracing of medical gas equipment is frequently left uncoordinated between the mechanical and structural disciplines; equipment anchorage shall be reviewed by the structural engineer of record. {note}
+### Seismic bracing of medical gas equipment is frequently left uncoordinated between the mechanical and structural disciplines; equipment anchorage shall be reviewed by the structural engineer of record.
### Equipment anchorage shall be coordinated with the structural engineer of record. [[drawing: equipment anchorage details]]
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## Stocking spares for source equipment and outlets lets the facility restore service quickly without interrupting patient care while replacement parts are procured. {note}
−### The Contractor shall furnish the following spare parts to the owner at closeout. {note}
+### The Contractor shall furnish the following spare parts to the owner at closeout.
- Spare station outlet and inlet assemblies for each gas and connector type
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- Source equipment filters and dryer media
```