11
Airflow stops or slows down, or alarm sounds. Do not use Powered Air Purifying Respirators if
airflow is less than 170 slpm (180 slpm for the Z4
®
).
Breathing becomes difficult.
You become dizzy, nauseous, too hot, too cold, or ill.
Your eyes, nose, or skin become irritated.
You taste, smell, or see contaminants inside the helmet.
You have any other reason to suspect that the respirator is not providing adequate protection.
When the unit is powered off, little or no respiratory protection is to
be expected. This is considered an abnormal situation. When the unit
is powered off, a rapid build up of carbon dioxide and a depletion of oxygen within the helmet or
hood may occur.
PRODUCT CARE
Never place the PX4 AIR
®
on hot surfaces. Do not apply paints, solvents, adhesives or self-
adhesive labels except as instructed by RPB
®
. This product may be adversely affected by certain
chemicals.
See the “Inspection and Cleaning” section for cleaning instructions.
INSTRUCTIONS FOR SPECIFIC USES OR ENVIRONMENTS
Welding and Grinding
For welding, grinding, and other applications that produce sparks or high heat, be sure to use the
FR (Fire Retardant) specific model of the PX4 AIR
®
with the FR belt and spark arrestor in place,
see “Respirator Setup and Care” (page 12).
Confined Spaces
If this respirator is used in confined spaces, ensure the area is well ventilated and that all
contaminant concentrations are below those recommended for this respirator. Follow all
procedures for confined space entry, operation, and exit as defined in applicable regulations and
standards.
Welding in Confined Spaces
Welding in a confined space can present an atmospheric hazard due to the generation of
contaminants and displacement of oxygen. A pressure-demand SCBA or a multifunctional
pressure-demand supplied-air respirator with self-contained air supply shall be used during
welding in confined spaces when welding can reduce the ambient oxygen level and supplemental
ventilation and atmospheric monitoring are not provided. For more information on respirator types
refer to local regulations and standards.
Environments Containing Organic Vapors
Use the OV/HE combination filter part number 03-995.
WARNING
