9
E
E
N
N
G
G
L
L
II
S
S
H
H
To conduct a positive pressure seal check, block the
openings in the exhalation valve guard using the palm of
your hand and simultaneously exhale. If the facepiece
bulges slightly and no air leaks between the facepiece
and your face are detected, an effective seal has been
obtained. If air is detected to be leaking out between the
facepiece and your face, reposition the facepiece on
your face and/or readjust the tension of the head har-
ness to eliminate the leakage. This check must be
repeated until an effective seal of the facepiece to face
is obtained. (See Figure 11.)
4 USE
You are now ready to enter the use environment for which
the air purifying respirator is intended.
FIGURE 10
Negative Pressure Seal Check
FIGURE 10A
Negative Pressure Seal Check With Back Pack Accessory
FIGURE 11
Positive Pressure Seal Check
Immediately leave the work area and replace the res-
pirator if:
i.
breathing becomes difficult;
ii. dizziness or other distress occurs;
iii. you smell, taste or sense irritation from the
contaminants in the work area;
iv. the air purifying element is equipped with
an End-of-Service-Life Indicator which has
changed color to indicate expiration, or
v. the respirator becomes damaged.
Should any of these occur, and you remain in the con-
taminated work area, you risk exposure to hazardous
quantities of the air contaminant which can result in
serious injury, illness or death.
WARNING
If the air-purifying elements have End-Of-Service-Life
Indicators (ESLI), you must be able to see the End-of-
Service-Life Indicators without manipulation of the car-
tridges or facepiece while wearing the respirator.
Refer to specific user instructions supplied with cartridges
for additional ESLI information.
Do not use the Back Pack accessory with air-purifying
elements that have End-Of-Service-Life Indicators,
because you will not be able to see the End-of-Service-
Life Indicators while wearing the respirator.
If you cannot see the indicators, do not use the respira-
tor because you will not know when the cartridge has
expired. Should this occur, and you remain in the con-
taminated work area, you risk exposure to hazardous
quantities of the air contaminant which can result in seri-
ous injury, illness or death.
WARNING
