SURVIVAIR Opti-Fit
™
Convertible Facepiece
27
●
For belt-mounted setup: Also detach the breath
-
ing tube from the facepiece, if attached, and
verify that an o-ring is installed at the base of
the adapter inlet. See Figure 24.
Figure 24. Breathing Tube O-ring
3. Verify that the power cord is connected between
the battery pack and blower.
4. If the waist belt was not donned while perform-
ing the pre-operational flow check, don the
waist belt now and tighten snugly. Secure any
excess belt length.
5. Slide the battery pack and blower into position
around your waist.
●
For mask-mounted setup: Position the battery
pack to your right or left side.
●
For belt-mounted setup: Position the blower
around to your back and the battery pack to
your right or left side.
6. Adjust the top straps until one inch of strap ex-
tends through each buckle. Fully loosen the
lower straps. For respirators with a Headnet,
loosen all straps.
7. Place the neck strap (if installed) over your head.
8. Place your chin against the chin cup and center
the facepiece on your face. See Figure 25.
Figure 25. Place Chin in Chin Cup
Hold the facepiece against your face and pull
the straps over your head.
9. Tighten the two lower straps, temple straps,
then the top straps until a good seal is obtained
and all straps lie flat on your head. See Figure
26a. For respirators with a Headnet, tighten the
two lower straps, then the temple straps, until
a good seal is obtained and all straps lie flat on
your head. Flatten the Headnet with a wiping
motion toward the back of your head. Retight-
en straps as necessary. Do not overtighten the
straps. See Figure 26b.
Figure 26a. Adjust Lower Straps
Figure 26b. Flatten Headnet with a Wiping Motion
NOTE
When properly adjusted, the head strap hub
should be centered on the back of your head
and the lower straps should be below your
ears. See Figure 27a. For the Headnet ver-
sion, the backstrap should be at the nape of
the neck. The Headnet should lie flat on the
head and not bunch up. See Figure 27b.
Figure 27a. Properly Center the Head Strap Hub
