Dräger Panorama Nova S Instructions For Use Manual page 18

Maintenance
(3) Leak test under water
1. Completely immerse the test head with the applied full face mask
in water.
2. Create an overpressure of approx. 10 mbar and slowly turn the
immersed test head.
Emerging air bubbles indicate the leak.
3. Take the test head with the full face mask out of the water, repair
the full face mask, replace leaking components.
4. Remove the exhalation valve plug and insert the exhalation valve.
5. Repeat the leak test (1).
Checking the opening pressure of the exhalation valve
When using the Quaestor test unit, the initial pressure should be at
least 4.2 mbar at a constant flow rate of 10 litres per minute through
the full face mask. Otherwise, replace the spring and repeat the test.
When using a test unit that does not allow for this constant flow rate
(e.g. Testor), the initial pressure must be at least 4.5 mbar.
After testing
1. Press the button and disconnect the adapter.
2. Remove the full face mask from the test head and dry it if
necessary.
3. Fit the exhalation valve cover. Ensure that it locks into place.
4.4 Special maintenance work
4.4.1 Replacing the visor
1. Hold the hexagon nuts in position and
unscrew the screws (1).
2. Remove both mask/helmet adapters.
3. Pry the visor frame apart at the joints
using a screwdriver, then pull it off to
the top and bottom.
4. Remove the support plate, if necessary
(see Chapter 4.4.2 on Page 18).
18
5. Detach the old visor from the rubber frame.
6. Insert the new visor first in the upper and then in the lower part of
7. Pull the rubber frame over the left and right edges of the visor.
8. Moisten the outside of the rubber frame and the inside of the visor
9. First press on the upper, then the lower visor frame.
10. Insert the support plate if necessary.
11. Make sure that the axis of rotation of the mask/helmet adapter (2)
12. Screw the mask/helmet adapters and the visor frame together
4.4.2
1. Pull the inner mask out of the groove of the threaded ring.
2. Force open the clamping ring with a screwdriver.
3. Remove the clamping ring and slip ring and the support plate.
4. Pull the connector out of the mask body.
5. Fit the new connector with a speech diaphragm as well as in- and
6. Fit the slip ring and new clamping ring.
7. Attach the hook to ensure the tightest possible fit of the clamping
8. Push the support plate between the clamping ring and the slip ring;
1
9. Compress the nose of the clamping ring with pliers until the
x
2
10. Attach the inner mask. Make sure that the edge lies in the groove
(approved by Dekra Exam)
the rubber frame.
The centre markings on the visor should line up with the seam on
the mask body.
frame with soapy water.
is below the visor frame divide.
using the screws and the hexagon nuts as well as three plastic
washers each and tighten until the distance (x) between the
clamping cams is 3 to 0.5 mm.
Replacing the connector
exhalation valves and insert the connector so that the markings on
the centres of the connector and the mask body are aligned.
ring.
fit it into the lower visor frame and align it.
equipment connector is securely located in the mask body.
all around. The centre markings on the connector and on the inner
mask must coincide.
Panorama Nova S - P