GE Carestation 620, User'S Reference Manual

Page: 206 / 268

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.
• Disconnect the pipeline supplies when the system is not in use.
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.
O2 flow
Pipeline or regulated cylinder pressure supplies O2 directly to the O2
fresh gas control, O2 flush, and to the ventilator if O2 is configured
as drive gas. If the system is configured with an auxiliary O2
flowmeter, O2 is also supplied to the auxiliary O2 port. If the pressure
is too low, an alarm appears on the display.
The flush valve supplies high flows (between 25 and 75 l/min) of O2
to the fresh gas outlet when the O2 flush button is pushed. The flush
switch uses pressure changes to monitor the position of the flush
valve.
N2O flow
A balance regulator controls the flow of N2O to the flow control
valve. Oxygen pressure at a control port adjusts the output of the
regulator. This stops flow during an O2 supply failure and ensures
that the hypoxic gas pressure decreases with the O2 supply
pressure. Changes in O2 pressure do not affect Air.
A chain linkage (Link-25) on the N2O and O2 flow controls helps
keep the O2 concentration above approximately 25% at the fresh
gas outlet.
Air flow
Pipeline or regulated cylinder pressure supplies Air to the fresh gas
control and to the ventilator if Air is configured as drive gas. A
second regulator decreases the pressure for the fresh gas control. If
the pressure is too low, an alarm appears on the display.
Pipeline or regulated cylinder pressure supplies Air directly to the
fresh gas control if Air is not configured as drive gas.
WARNING
Carestation
™
620/650/650c (A1)
11-4
2076152-001