on 7 scfm (200 L/M for each ventilator from the outlet
back to the source.
2.
Nitrogen: 1448 kPa (210 psi).
3.
Medical vacuum: 50 Pa (15 inches Hg).
B.
Size medical compressed air system to provide 690 kPa (100
psi) discharge from compressor to dryers.
C.
In sizing the vacuum system, increase the cubic feet per
minute (cfm) load by 25 percent to accommodate future system
expansion. Include waste anesthetic gas disposal system
terminal inlets and piping in appropriate projects; connect to
the medical vacuum system above the corridor ceiling after the
valve box. Check to see if an anesthetic and respiratory
analysis system (such as SARA) is to be included in the
project, and if so, provide two 25 mm (one inch) conduits from
each ceiling column assembly to above corridor ceiling.
D.
Place a source shut-off valve for each medical gas and vacuum
system at the immediate outlet (or inlet, in the case of
vacuum) of the source of supply, so that the entire supply
source, including all accessory equipment, can be isolated
from the entire pipeline system.
E.
Include sufficiently sized and properly constructed storage
space for the gas cylinders with manifold systems. Primary and
reserve banks are required for cylinder gas sources.
F.
The medical air compressors and medical vacuum pumps shall
serve the medical air and medical vacuum systems only.
G.
Locate compressors and pumps in a
clean, relatively cool
environment (i.e., not with steam
equipment, not to exceed 38
degrees C (100 degrees F) ambient
temperature). Locate
equipment in an area where it can
be monitored regularly.
H.
Medical air compressors and vacuum pumps shall be multiplexed
with single receivers. Size compressors and pumps such that
100 percent of the design load is carried with the largest
single unit out of service. Provide three valve bypass at
receiver. In designing a system where adult ventilators are
utilized, add the ventilator requirement of 100 L/min (3.5
cfm) for each ventilator in use to the compressor sizing. Size
the piping system based on the instantaneous demand of 200
L/min (7 cfm) for each ventilator from the outlet back to the
source.
I.
Air compressors shall be a type that provides "Medical
Compressed Air", as defined by NFPA 99.
J.
Design air dryers, filters and pressure regulators for the
medical air system in duplex, each sized for 100 percent of
the load using duplex twin tower desiccant dryers. Include
continuous line dewpoint and carbon monoxide monitoring with
sample connections on the discharge piping downstream of the
filters and regulators. Locate monitors at the pump control
panel or integral with control panel.
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