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Aespire 7900
Gas supplies
w WARNING
O
Air and N
6-4
Gas goes into the system through a pipeline or cylinder connection. All
connections have indexed fittings, filters, and check (one-way) valves. Gauges
show the cylinder and pipeline pressures.
A regulator decreases the cylinder pressures to the appropriate system
pressure. A pressure relief valve helps protect the system from high pressures.
To help prevent problems with the gas supplies:
• Install yoke plugs on all empty cylinder connections.
• When a pipeline supply is connected, keep the cylinder valve closed.
Do not leave gas cylinder valves open if the pipeline supply is in
use. Cylinder supplies could be depleted, leaving an insufficient
reserve supply in case of pipeline failure.
flow
Pipeline or regulated cylinder pressure supplies O
2
(O
Ventilator).
2
The flush valve supplies high flows of O
the flush button. The flush switch uses pressure changes to monitor the
position of the flush valve. A message on the ventilator tells you when Flush is
ON.
When the system switch is ON, O
minimum flow through the O
A secondary regulator supplies a constant O
valve.
An electrical switch monitors the O
an alarm appears on the ventilator.
O
A balance regulator controls the flow of N
2
pressure at a control port adjusts the output of the regulator. This stops flow
during an O
supply failure and ensures that the hypoxic gas pressures
2
decrease with the O
Air.
A chain linkage on the N
concentration higher than approximately 21% at the fresh gas outlet.
Pipeline or regulated cylinder pressure directly supply Air to the ventilator (Air
Ventilators). When the system switch is ON, air flows to the rest of the system.
Because there is no balance regulator, air flow continues at the set rate during
an O
supply failure.
2
to the fresh gas outlet when you push
2
flows to the rest of the system and there is a
2
flowmeter.
2
pressure to the flow control
2
supply pressure. If the pressure is too low,
2
O to the flow control valve. Oxygen
2
supply pressure. Changes in O
2
O and O
flow controls helps keep the O
2
2
directly to the ventilator
2
pressure do not affect
2
2
1009-0633-000
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