3.2.7
Vacuum Systems Tests
Test vacuum, anesthesia gas evacuation, and oral evacuation systems.
3.2.7.1
Leak Tests
After installation of outlet valves but before installing vacuum pumps and
alarm switches, pressurize each section of each system with oil-free dry
nitrogen to 414 kPa 60 psig and test with soap solution. Repair leaks and
retest.
3.2.7.2
Final Pressure Tests
Pressurize system with oil-free dry nitrogen to 173 kPa (gage) 25 psig for
24 hours. No pressure drop, except due to temperature change, will be
accepted. Allow for ambient temperature change in accordance with the
relationship PF + 101.32 = (P1 + 101.32) (T2 + 273)/(T1 + 273) PF + 14.7 =
(P1 + 14.7) (T2 + 460)/(T1 + 460), in which T and P represent Centigrade
Fahrenheit temperature and gage pressure respectively, numbers 1 and 2
denote initial and final readings respectively, and PF is the calculated
final pressure. When PF exceeds the measured final pressure, retest each
section individually, and apply a soap solution to all joints of each
section in which a reduction in pressure occurs after allowing for ambient
temperature change. Repair leaking joints and repeat test until no
reduction in pressure occurs. Use a test gage calibrated in 2 kPa one psi
increments and readable to one kPa (gage) 1/2 psig.
3.2.7.3
Vacuum Tests
After the installation of alarm switches, evacuate each system to 54 kPa 17
inches Hg, or to the indicated kPa inches Hg for oral evacuation system,
and test each outlet's pressure (vacuum) with a test gage calibrated in 2
kPa one inch Hg increments and readable to one kPa 1/2 inch Hg.
3.2.7.4
Cleaning
Carefully wipe off soapsuds and seal openings against contamination until
tanks or equipment are connected.
3.2.8
Cross-Connection Tests by Testing Agency
Comply with NFPA 99. Pressurize each system with nitrogen in accordance
with Table 3. Check 100 percent of the outlets in each system. Include
anesthesia gas evacuation in vacuum systems. Do not include the oral
evacuation systems in these tests.
TABLE 3
CROSS-CONNECTION TEST PRESSURES
System
kPa (gage)
Vacuum
69
Nitrogen
207
Nitrous Oxide
276
Oxygen
345
Medical Air
414
SECTION 15217N
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