B.
The main supply line shall be provided with a shutoff valve.
The valve shall be located as to be accessible by authorized
personnel only. The main supply line valve shall be located
downstream of the source valve and outside of the source room
or enclosure, or where the main enters the building. This
valve shall be identified. A main line valve is not required
when the source valve is accessible within the building.
C.
Each branch or riser supplied from the main line shall have an
in-line shut-off valve adjacent to the main. Each branch
supplied from a riser shall have an in-line shut-off valve
adjacent to the riser. Conceal in-line shut-off valves (e.g.
above ceiling with ceiling tag, or in a locked equipment
room), and make provision to lock them open.
D.
Include a zone valve, in a cabinet with other medical gas zone
valves, for all anesthetizing locations and branches serving
station outlets and inlets in conformance with NFPA 99.
Provide additional service valves above ceiling to subdivide
areas for maintenance.
E.
Combine anesthesia evacuation piping with the medical vacuum
system piping above ceiling and after zone valve.
F.
Except for nitrogen systems, medical gas station outlets and
vacuum station inlets in new buildings shall be quick coupler
type. Where building alterations or additions occur, station
outlets and inlets shall be compatible with those of the
existing building, without the use of secondary adapters.
G.
All nitrogen station outlets are required to be DISS type, and
shall be with nitrogen control panel (NCP) within the room
being served.
H.
Locations of piped medical gas station outlets and vacuum
station inlets are indicated in VA Program Guide 7610,
(Equipment Guide List), under "Outlets".
I.
Provide protective pipe enclosure for exterior oxygen. Provide
minimum burial depth 600 mm (2 feet) below grade.
11.6
Alarms:
A.
Two master system alarms, in separate warning locations, are
required for each medical gas and vacuum system.
1.
The primary warning location shall be supervised by
engineering personnel, and is required to be one of the
following (in order of priority): boiler plant control
office, engineering control center, or in the office or
principle working area of the individual responsible for
maintenance of the medical gas system.
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