PMS PROCEDURE (continued) NM2C
( ) 6.7A SCAVENGER, A/C - if applicable
6.7A.1 Scavenger, A/C Cleaning
6.7A.1.1 Remove all scavenger hoses one at a time, and drain all
accumulated moisture. Inspect all scavenger hoses for
deterioration and replace any worn hoses.
6.7A.1.2 Remove the safety relief valve housing by unscrewing it in a
counter-clockwise direction.
6.7A.1.3 Inspect the rubber O-ring and replace if worn.
6.7A.1.4 Remove the safety relief valve from its housing by twisting it out
in a counter-clockwise direction. The tips of needle-nose pliers can
be used to turn the valve. Be careful not to damage the valve disk.
6.7A.1.5 Remove any accumulated lint or dust from the valve with a soft
brush. The valve may be further cleaned with a low flow of clean
air or oxygen. The scavenger body can be cleaned with a moist
cloth.
6.7A.1.6 Reinstall the valve into the housing, making sure that it is
threaded all the way into the housing and that the plastic washer
is properly seated on its upper surface.
6.7A.1.7 Make sure that the interior of the valve body is completely dry.
Reinstall the valve housing onto the scavenger body, making sure
that the O-ring is properly seated.
6.7A.2 Scavenger, A/C Positive Pressure Relief
6.7A.2.1 Connect a 19 mm scavenger hose between the bottom of the
absorber pole and the right-hand port on the scavenger. Connect
a short 19 mm scavenger hose between the APL valve and the port
on the rear of the absorber pole. Connect a 19 mm scavenger hose
between the ventilator relief valve and the left-hand port on the
scavenger.
6.7A.2.2 Connect a short 22 mm breathing hose from the inspiratory valve
to the expiratory valve on the absorber or the expiratory hose
terminal on the ultrasonic flow sensor, if applicable.
6.7A.2.3 Set the Man/Auto valve to the AUTO position.
Rev. P
6-8
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