K.
Locate the medical air compressor system intake outdoors above
roof level, at least 7500 mm (25 feet) [may be more depending
upon prevailing wind direction and velocity] from any building
opening or other intake, and where no contamination from
engine exhausts, fuel storage vents, vacuum system discharges,
particulate matter or odor of any type is anticipated. Air
that is already filtered for ventilation system use is an
acceptable source of air for medical air compressors. Combined
intakes must be sized for no restriction while flowing maximum
intake possible, and provided with an isolation valve at the
header for each compressor served.
L.
Combine discharge from each medical vacuum pump into one
discharge pipe, sized for no restriction while flowing maximum
discharge possible, and provide an isolation valve at the
header for each pump served. Exhaust discharge at the highest
point of the building, above and at least 7500 mm (25 feet)
horizontally (may be more depending upon prevailing wind
direction and velocity) from any intake, door, window,
louvered or ventilating opening of the building.
12.5
A.
Design pressure piping systems not to exceed 35 kPa (5 psi)
loss from source to point of use. Design vacuum piping systems
not to exceed 10 Pa (3 inches Hg) from source to point of use.
B.
Provide main line supply line with a shut-off valve. Locate
valve as to be accessible by authorized personnel only and be
located downstream of the source valve and outside of the
source room, enclosure, or where the main valve enters the
building. Identify this valve. A main line valve is not
required when the source shut-off 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.
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