Dräger FPS 7000 Notice D'utilisation page 12

Replacing O-ring and speech diaphragm
● Remove the nose cup.
● Unscrew the speech diaphragm with a socket wrench (Figure H)
and remove it.
● Perform visual inspection of speech diaphragm and O-ring and
replace if necessary.
● Insert O-ring, then screw in speech diaphragm (recommended
torque: 2.95 ±0.37 ft lb/400 ±50 Ncm).
● Attach the nose cup.
Replacing the exhalation valve
● Remove the screw from the flap.
● Open the flap.
● Pull the straight arm of the spring adapter outwards and remove
the spring adapter (Figure I).
● Remove the valve disk.
● Check if valve disk and seat are clean and undamaged. Clean or
replace if necessary.
● Insert the valve disk.
● Put the spring onto the center of the valve disk, insert the bent arm
and lock both arms of the spring adapter into place.
● Close the flap and fasten the screw.
Replacing the inhalation valve
● If fitted, open the button protector.
● Press the button on the connection piece.
● Pull the inhalation valve out of the connection piece.
● Check if valve disk and seat are clean and undamaged. Clean or
replace if necessary.
● Press the button on the connection piece and insert the inhalation
valve into the facepiece.
● If fitted, close the button protector.
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Replacing the valve disks of the nose cup valves
● Check if valve disk and seat are clean and undamaged. Clean or
replace if necessary.
Replacing the connection piece
● Remove the nose cup.
● Remove the screw from the flap and take off the flap.
● Unhook the cap from the visor frame (Figure F1-1) on both sides.
● Use your thumb to press against the bottom part of the cap, then
remove the cap from the fastening noses (Figure F1-2).
● Pull the cap upwards and away from the facepiece.
● Use a screw driver to pry open the clip, then remove it.
● Pull out the old connection piece.
● Insert the new connection piece so that it is form-fitting and
aligned according to the center marking.
● Align and mount new clip: Attach the hook to ensure the tightest
possible fit of the clip. Compress the nose on the connector clamp
using type R 53 239 pliers until the facepiece connector is
securely located in the facepiece body.
● Put the cap onto the connection piece, lock it into place on the
fastening noses and hook it into the visor frame.
● Close the flap and fasten the screw.
● Attach the nose cup.
Replacing head harness or hairnet
Replace head harness or hairnet as follows:
● Pull the head harness away from the flap of the facepiece
(Figure J1-1).
● Push the clip of the head harness towards the visor (Figure J1-2).
Attach head harness or hairnet to the facepiece as follows:
● Put the clip onto the flap of the facepiece, then press the lock
(Figure J2).
Make sure that the nose of the flap locks firmly into hole of the clip.
Use Instructions for NIOSH-approved full facepieces