To Change The Exhalation Membrane; To Change The Face Seal; Parts List - Sundstrom SR 540 Mode D'emploi

equipment. The use of non-genuine parts or modification of
the equipment may reduce the protective function and put at
risk the approvals received by the product.

4.4.1 To change the exhalation membrane

The exhalation membrane is mounted on a pin on the inside of
the valve cover. The cover must be changed at the same time
as the membrane. Proceed as follows:
• Snap off the valve cover from the valve seat. Fig. 9.
• Slip off the membrane.
• Press the new membrane onto the pin. Carefully check that
the membrane is in contact with the valve seat all round.
• Press the valve cover into place. A clicking sound indicates
that it is in place.
4.4.2 To change the visor
The visor has two fixing points, one of which is of over-centre
type and is used for tensioning the visor. The visor can be
changed without tools. Proceed as follows:
• Remove the closing panels by pushing them forward with
your thumb. Fig. 10.
• Release the visor by moving the lever of the over-centre lock
upwards through about 180 degrees. Fig. 11.
• Remove the visor.
• Remove the peel-offs from the new visor.
• Secure the new visor first to the fixed mounting and then to
the over-centre mounting.
• Tension the visor by moving the lever downwards as far as
it will go. Fig. 12.
• Check that the visor is firmly in contact with the visor opening
seal all round.
• Fit the closing panels by pushing them into place with your
fingers. A clicking sound indicates that they are in place. Fig.
13.

4.4.3 To change the face seal

The plastic frame of the face seal is provided with a groove (Fig.
14) into which the visor unit frame fits (Fig. 15). The frame is
locked in position by means of two pins - one at each end - that
fit into holes in the visor unit. The ends of the face seal fabric
are provided with hooks that are secured to the head harness.
Proceed as follows:
• Release the hooks from the head harness. Fig. 16.
• Release the face seal by pulling its frame so that its pins are
released from the visor unit holes. Fig. 17.
• Remove the face seal.
• Thread the new face seal over the visor unit flange, with the
centre markings in line with one another. Fig. 18.
• Press the face seal frame down so that the pins drop into
the visor unit holes. A clicking sound indicates that they are
in place. Fig. 19.
• Secure the hooks to the head harness in the place where
the sweatband is relieved. Fig. 16.
4.4.4 To change the sweatband
The sweatband is secured to the forehead strap by means of
Velcro tape. Proceed as follows:
• Release the face seal hooks from the head harness. Fig. 16.
• Pull the sweatband off.
• Fit the Velcro strip with the ruffled side towards the forehead
strap and with the relief upwards.
• Secure the hooks to the head harness where a relief has
been made in the sweatband. Fig. 16.

5. Parts list

16
Part
Breathing hose
O-ring for breathing hose. Fig. 3b
Flat gasket for hose. Fig. 3a
Set of valves
Sweatband
Face seal. Fig. 14
Head cover SR 543. Fig. 20
Visor set, PC
Visor set, PETG
Peel-off set
Cleaning tissues SR 5226, box of 50
6. Approvals
CE/EN
SR 540 in combination with fan unit SR 500/SR 700:
12941:1998, class TH3. SR 540 in combination with com-
pressed air attachment SR 507 and air hose SR 358 or SR
359: EN 14594:2005, class 3B. SR 540 in combination with
compressed air attachment SR 507 and air hose SR 360: EN
14594:2005, class 3A.
The EC type approval certificate has been issued by Notified
Body No. 0194. For address, see back-cover.
Australian StandardsMark
The face shield SR 540 are tested according to AS/NZS
1716:2012. The StandardsMark is issued under licence by
SAI Global Certification Services Pty Limited Lic No. 766 (ACN
108 716 669) ("SAI Global").
Ordering No.
R06-0501
R06-0202
R06-0506
R06-0505
R06-0504
T06-0504
T06-0505
R06-0502
T06-0502
T06-0501
H09-0401