CleanSpace CS302, User Instructions

Page: 39 / 90

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23. Changing Half Mask Exhalation Valve Covers
The mask can be configured to use either the Standard Exhalation Valve Cover or the BIO Exhalation Valve cover.
To make the change, simply remove one valve cover and fit the other, as follows.
To remove Standard Valve Cover, locate the snap feature on the cover that secures it to the valve seat. This feature
is located on the bottom edge of the valve seat. Using your thumb nail or a small blunt
object such as a pen, press on the snap until the cover springs free of the valve seat.
To fit the Standard Valve Cover, locate the small prong on the Valve Cover into the
matching hole in the valve seat. Rotate the Valve Cover towards the mask until the snap
on the Valve Cover engages the matching opening in the valve seat.
To remove the BIO Exhalation Valve Cover, grasp the bottom of the mask (where the
size marking is located) in one hand and the BIO Exhalation Valve Cover in the other,
and separate them by pulling apart along the bottom edge of the Valve Cover.
To fit the BIO Exhalation Valve Cover, grasp the bottom of the mask (where the size marking is located) in one hand
and the BIO Exhalation Valve cover in the other. Orient the Valve Cover air outlet so that it points towards the size
marking on the mask (i.e. down when in use). Position the top edge of the Valve Cover against the silicone mask just
above the body of the exhalation valve. Push the BIO Exhalation Valve Cover firmly towards the mask until it snaps
into place and is securely fastened to the valve seat. See illustrations below.
After installing either Valve Cover ensure the valve flap is flat and sealed against the valve body by inspecting the
interior of the valve body.
Removing the BIO Exhalation Valve Cover (left); and fitting it (right)
WARNING
Using a full face mask with the rain cover raised can cause the exhalation valve to vibrate, which you may
notice as a buzzing noise. Lower the rain cover for correct operation.