Dräger Panorama Nova RA Gebrauchsanweisung Seite 14

Special maintenance and care
Replacing the visor
Full face mask with metal visor frame:
Unscrew the screws whilst holding on tightly to the hexagon nuts.
Full face mask with plastic visor frame:
Unscrew the screws.
Use a screwdriver to pry apart the clamping frame at the joints,
then pull the top and bottom halves apart.
Remove the support plate if necessary (see "Replacing the
connector" on page 14).
Detach the old visor from the rubber frame.
Insert the new visor first in the upper and then the lower half of the
rubber frame.
The central markings on the visor must line up with the seam on
the mask body.
Pull the rubber frame to the right and left over the rim of the visor.
Moisten the outside of the rubber frame and the inside of the
clamping frame with soapy water.
Press on the clamping frame, top half first.
Insert the support plate if necessary.
Full face mask with metal visor frame:
Screw the screws into the hex nuts and tighten them until the
distance between the clamping pins is 3 to 0.5 mm.
Full face mask with plastic visor frame:
Insert the screws and tighten them until there is no longer a gap
between the upper and lower visor frames.
Replacing the connector
Pull out the inner mask.
Use a screwdriver to open the clip.
Remove the clip and also the slip ring and support plate.
Pull the connector off the mask body.
Fit the speech diaphragm and inhalation and exhalation valves to
the new connector and insert the connector so that the centre
markings of the connector and mask body line up.
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Fit the slip ring and new clip.
Hook the clip into place so that it is as tight as possible.
Push the support plate between the clip and the slip ring; fit it into
the lower visor frame and align.
Use R 53 239 pliers to squeeze the tip of the clip until the
connector fits tightly in the mask.
Press the inner mask back into place. In doing so, ensure that the
entire edge fits in the groove. The centre markings on the
connector and the inner mask must line up.
Replacing the valve discs on the control valves
Pull out the old valve disc towards the inside.
Insert the stud of the new disc into the hole from inside, and pull it
towards the visor until the recess of the stud is visible.
The valve discs should make even contact with the inside surface.
Replacing the speech diaphragm or O-ring
Masks with metal speech diaphragms:
Pull the inner mask out of the groove in the screw ring.
Use the socket wrench R 26 817 to unscrew the screw ring.
Turn the socket wrench around and carefully insert it in the holes
of the protective screen. Do not damage the diaphragm.
Twist the speech diaphragm loose and remove it.
Use sealing ring extractor R 21 519 to remove the O-ring from the
connector.
Check the speech diaphragm and O-ring, and replace if necessary.
Insert the O-ring and speech diaphragm.
Screw in the screw ring (400 ±50 Ncm).
Press the inner mask back into place. In doing so, ensure that the
entire edge fits in the groove. The centre markings on the
connector and the inner mask must line up.