Scott AIR-PAK 75i 2.2 Operating & Maintenance Instructions page 23

DONNING PROBLEMS
1. Perform a personal check of the Facepiece and Head Harness and
address any donning problems. OSHA standard 29 CFR 1910.134
requires teams of at least two people for situations where this type
of equipment is used. Have your partner help you verify the face-
piece is donned properly.
Possible problems include:
a) Head Harness Strap twisted,
b) Head Harness off-center or not flat against the head,
c) Head Harness too high on the head,
d) Hair or clothing in the face seal,
e) Face seal rolled over inside the facepiece rather than flat against
the face
f) Facepiece is sitting too low on the face as evidenced by pressure
on the forehead or the facepiece making contact with the throat
area permitting a break in the seal.
The illustrations below depict the AV-3000 SureSeal, but similar con-
ditions can occur with the AV-2000 or AV-3000 facepiece as well.
HARNESS STRAP
TWISTED
FACE SEAL
ROLLED OVER
If any donning problems are found, remove the facepiece and re-don
the facepiece correctly.
2. Proceed to BEGIN USE OF THE RESPIRATOR as instructed
below.
HEAD HARNESS
OFF CENTER
FACEPIECE
TOO LOW
FIGURE 11
DONNING PROBLEMS
HEAD HARNESS
TOO HIGH
Page 23 of 44
WARNING
IF ANY DONNING PROBLEMS ARE FOUND,
REMOVE THE FACEPIECE AND RE-DON
IT CORRECTLY. USE OF AN IMPROPERLY
DONNED FACEPIECE MAY LEAD TO EXPO-
SURE TO THE HAZARDOUS ATMOSPHERE
WHICH COULD RESULT IN SERIOUS INJURY
OR DEATH.
USE OF RESPIRATOR
CONTINUED ON NEXT PAGE...
P/N 595236-01 Rev. B 10/11