11-10 
 
  To install the inspiration safety valve membrane: 
1.   Assemble the safety valve membrane to the membrane fixing knob. The 3 holes on the 
membrane match the 3 posts on the membrane fixing knob, as shown below. Ensure the 
metal side of the membrane support can be seen through the hole on the membrane 
fixing knob. 
 
2.  Align the guides on membrane fixing knob with the grooves of safety valve body. Insert 
the membrane fixing knob, press it tightly and rotate it clockwise to the end position. 
 
11.2.3 High Efficiency Particle Air (HEPA) Filter Assembly and 
Dust Filter 
 
A.  HEPA filter      B.  Main unit air inlet grille      C.  Air intake dust filter 
A 
 
B 
C