Chlorides - 10 mg/L maximum
Hardness - 200 mg/L maximum
Total Dissolved Solids - 200 mg/L maximum
B.
Establish water pressure at the pump and compressor locations
to determine if booster water pumps are necessary. If pressure
is less than 345 kPa (50 psi), the pump or compressor may not
perform adequately. Investigate several manufacturers'
requirements to maintain competition and to reduce the
incidence of change orders.
11.3
In renovation projects, survey the medical center to ascertain the
type of existing medical gas station outlets and medical vacuum
terminal inlets. The master specification requires that new
outlets and inlets match the existing terminal connections. In the
case where existing station outlets or terminal inlets are not
U.L. approved, or not gas specific as defined in NFPA 99, the
contract specification must be left open for competitive bids on
new outlets and inlets. This may require the medical center to
reterminate the connectors on existing medical devices and
equipment which normally connect to the existing outlets and
inlets.
11.4
Central Supply Systems:
A.
Design medical gas and vacuum systems to deliver the following
pressures at the points of use:
1.
Oxygen, nitrous oxide and medical air: 345 kPa (50 psi).
2.
Nitrogen: 1100 kPa (160 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 medical vacuum system; increase the 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.
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