Dräger Panorama Nova P Mode D'emploi page 14

Special Maintenance and Care
Replacing the visor
Full face mask with metal visor frame:
Unscrew the two clamping screws on the left and right, blocking
the hexagon nuts.
Full face mask with plastic visor frame:
Unscrew the screws.
Pry the clamping frame apart at the joints with a screwdriver, and
then pull the top and bottom halves apart.
Remove the support plate if necessary, see "Replacing the
equipment 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 gap remaining
between the upper and lower visor frames.
Replacing the equipment connector
Pull the inner mask out of the groove of the screw ring.
Open the clip with a screwdriver.
Remove the clip and the parts underneath it (slip ring and support
plate).
Pull the equipment connector off the mask body.
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Fit the speech diaphragm and inhalation and exhalation valves to
the new equipment connector and insert the connector so that the
centre markings of the connector and mask body line up.
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
equipment connector fits tightly in the mask.
Press the nose cup back into place.
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
Pull the inner mask out of the groove in
the screw ring.
Unscrew the screw ring with socket
wrench R 26 817.
Turn 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.
Remove the O-ring from the mask connector with extractor
R 21 519.
Check the speech diaphragm and O-ring, and replace if
necessary.
Press the nose cup back into place. When doing this, make sure
that the edge of the inner mask slips into the groove of the screw
ring. It should fit all around the screw ring. The centre markings on
the equipment connector and the inner mask must line up.