E c o n o m y M a n i f o l d
P a g e : 1 0
FINAL TESTING
Purging and analysing of the complete medical gas piping system shall be carried out in accordance
with NFPA 99, 4-5 Testing.
SET-UP
Set one operating regulator to “In Use” and the other to “Reserve”. With the high pressure inlet
valves outside the cabinet both OPENED, S-L-O-W-L-Y open the cylinder valves on the cylinders
closest to the manifold on the “In Use” side. After one minute S-L-O-W-L-Y open all other cylinder
valves on that side. Then repeat the procedure for the “Reserve” side. A pipeline outlet downstream
of the manifold such as a purge valve or terminal valve should be opened and vented safely, to
produce a dynamic flow condition.
When both banks are open, check the inlet gauges to ensure that the correct pressure is indicated
and that the left hand and right hand banks have full cylinder pressure. The line pressure should be
55 psig [379 kPa] for all manifolds except for Nitrogen, 170 psig [1172 kPa].
RE-SETTING LINE REGULATORS
Back to handle out by turning it counter clockwise and press the bleed valve until gas empties from
the regulator. Then turn the handle clockwise until the desired pressure is reached.
NORMAL OPERATING PROCEDURE
Normal operating procedure for the Amico manifold entails connecting of the proper medical gas to
all cylinder extension bar outlets via the appropriate copper cylinder connection hose assemblies.
With the high pressure inlet valves open, S-L-O-W-L-Y open the cylinder valves on the cylinders
nearest the inlet valves on both banks. After waiting at least one full minute, allow time for the
dissipation of generated heat, S-L-O-W-L-Y open all the rest of the cylinder valves, one at a time.
The bank that was pressurized first will become the primary bank by turning the handle on the
corresponding operating regulator so it reads “In Use”. The other operating regulator should read
“Reserve”. The High pressure inlet valves should be left open under normal operating conditions.
In an emergency, these valves can be closed quickly.
Once the header bars have been pressurized, the Amico manifold is operating, since all regulators
and control equipment have been set in SET-UP section. When the primary supply bank is exhausted
and switch-over to the secondary bank occurs, the pressure switch notifies the person responsible,
that the cylinders on the primary bank need replacing.
Be sure to change the operating regulator settings BEFORE changing the cylinders. To replace the
empty cylinders with full ones, keep the high pressure inlet valves open throughout this procedure.
Close all empty cylinder valves and remove them. Attach full cylinders in their place, then S-L-O-W-
L-Y open the cylinder valve nearest the inlet valve and wait for at least one full minute before S-L-O-
W-L-Y opening the remaining cylinder valves, one at a time.
The introduction of full cylinder pressure into the cabinet’s main bar resets the pressure switch. The
Amico manifold is then ready for the next switch-over.
WARNING:
Fire Hazard. DO NOT permit smoking, or any other source of
ignition in area where the manifold is located, or near the relief valve vent
outlet. Be certain that all connections are free of dirt, grease and oil. These
substances burn with great intensisty in air, enriched with oxygen, or nitrous
oxide and some gas mixtures.
