8
When this product is used with an oxygen supply, ensure the area is well ventilated to prevent high levels
of oxygen accumulating. The regulator or patient
MUST NOT
be allowed near any source of ignition i.e.:
a). Cigarette/Cigar Smokers. b). Sparks
c). Naked Flames.
d). Open electrical appliances
These precautions must also be observed during and after patient use.
Warning:
This device
MUST NOT
come into contact with any oil or grease; a reaction may cause an
explosion / fire.
5.4 Cylinder Connection
The Automatic Twin Cylinder Changeover System has been designed to operate from two gas supply
cylinders each having a regulator fitted and connected to the pipeline system. Only one cylinder can be
operational at any one time. When one cylinder becomes empty, the Automatic Twin Cylinder Change-
Over System will switch to the full cylinder so that the empty cylinder can be disconnected and replaced.
The cylinder status indicator LEDs will indicate when the cylinder is ready for use (this is indicated when
LED turns green) and
System Line Pressure (Seven Segment) Indicator will display the cylinder
pressure.
5.5 Audible Alarm Function & Visual References
The audible alarm is a constant 75 dB tone which will sound for a five seconds to inform the user that
the system has performed an automatic changeover has taken place. In the event of this happening the
Cylinder Status Indicator will be illuminate red and the Press (to select a cylinder) Button will be locked
out on the failed cylinder side.
To bring the failed side back on line change the cylinder and reset the unit reference 4.6.
5.6 Automatic Input pressure inspection
If the vehicle/system is to be left unattended overnight, it is advised to turn off the cylinders, drain the
system, and mute the alarm and power down the unit. The system has been designed to perform a
gas
availability test
on both the reserve cylinder and primary cylinders to ensure that there is a readily
available supply of gas. The system does this by venting gas for four seconds to try to establish the
condition of the primary and reserve/secondary supplies. If the system fails to detect a constant primary
or secondary supply of gas the unit will ALARM for five seconds and the
Cylinder Status Indicator will
be illuminate red. The primary or reserve/secondary supply will be locked out, to reset system see 5.7,
if there is not any input gas available and the ALARM will sound constantly for sixty seconds.
Note the
alarm can be over ridden with operation reference 3.6
. The above inspection has been designed to be
performed after 10 hours if the unit has been stood idle.
5.6 Automatic Changeover
The unit is designed to automatically switch from an active input supply from either cylinder once that
input supply pressure has dropped to less than 3.1 bar. The Twin Cylinder Automatic Changeover upon
