RPB NIOSH PX4 AIR User manual

INSTRUCTION MANUAL
®
Employers: Read this manual and the respirator head-top Instruction
Manual and carry out the Employer Responsibilities (page 7).
Product users: Read this manual and the respirator head-top
Instruction Manual and follow the Product User Safety Instructions
(page 9).
Manuals are regularly updated. Make sure this manual is available to
all users for reference.
Current version of manual and other languages:
www.rpbsafety.com/product/px4-air/
®
PX4 AIR®
Protecting you for life’s best moments®

2
PX4 AIR®
EXPLANATION OF SIGNAL WORDS AND SYMBOLS 2
INTRODUCTION 3
IMPORTANT SAFETY INFORMATION
PROTECTION PROVIDED AND LIMITATIONS 4
RESPIRATORY COMPONENT DIAGRAM - NIOSH CAUTIONS & LIMITATIONS 6
EMPLOYER RESPONSIBILITIES 7
PRODUCT USER SAFETY INSTRUCTIONS 9
RESPIRATOR SETUP AND CARE 12
ALARMS 22
INSPECTION AND CLEANING 25
PRODUCT SPECIFICATIONS AND DATA 27
PARTS AND ACCESSORIES 28
WARRANTY AND LIABILITY STATEMENT 30
CONTENTS
EXPLANATION OF SIGNAL WORDS AND SYMBOLS
The following signal word and safety symbols are used in this manual and product labeling:
WARNING indicates a hazardous situation that, if not avoided, could
result in death or serious injury.
Read the Instruction Manual.
Additional copies of RPB®manuals can be found at www.rpbsafety.com.
WARNING
RPB®Safety LLC is an ISO9001 certified company.

3
RPB®SAFETY - GLOBAL HEADQUARTERS
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T: 1-866-494-4599 F: 1-866-494-4509 E: [e-mail] rpbsafety.com
RPB®SAFETY - APAC
1 Ivan Jamieson Place, Christchurch Airport, Christchurch 8053 New Zealand.
T: [phone] F: [phone] E: [e-mail] rpbsafety.com
RPB®SAFETY - EMEA
Unit 2, Teardrop Industrial Park, London Road, Swanley, BR8 8TS, United Kingdom
T: [phone] E: [e-mail] rpbsafety.com
Copyright ©2018 RPB Safety, LLC. All rights reserved. All materials contained on this
website are protected by United States copyright law and may not be reproduced, distributed,
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Safety, LLC. You may not alter or remove any trademark, copyright or other notice from
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All trademarks, service marks, and logos used in this publication, both registered and
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anywhere in the world, that are owned by, developed in whole or in part by, or licensed
by RPB Safety, LLC.For technical assistance contact our Customer Service Department at
1-866-494-4599 or email: [e-mail]
Form #: 7.20.524
Rev: 6
INTRODUCTION
The RPB®PX4 AIR®is approved by NIOSH as a Powered Air Purifying Respirator Fan Unit
designed to be used in conjunction with the approved RPB®head-tops for different applications
where there is a need for protection from airborne contaminants such as welding, grinding,
painting, and other construction and industrial applications, depending on the selected head-
top. For applications such as welding or grinding that produce sparks or high heat, a FR (Fire
Retardant) specific model is available, with a FR belt and spark arrester to prevent sparks from
entering the PAPR and igniting the filter material.
This product must be inspected and maintained in accordance with this instruction manual at all
times.
See PROTECTION PROVIDED AND LIMITATIONS (page 4) for details.

4
PX4 AIR®
RESPIRATION
The RPB®PX4 AIR®is approved by NIOSH in the categories as follows:
Powered Air
The RPB®PX4 AIR®PAPR, when properly fitted and used with all required components,
including the Breathing Tube Assembly and the approved head top, is part of a NIOSH
approved powered air purifying respirator. As such, it significantly reduces, but does not
completely eliminate, the breathing of contaminates by the respirator wearer. See the
instruction manual and approval label for the selected head top for NIOSH approval with the PX4
AIR®and the assigned protection factor. Specific protection depends on the filter selected for
use in the RPB®PX4 AIR®PAPR. It is approved to be used with the 03-985 High Efficiency
(HE) Filter.
HAZARD LIMITATIONS
The RPB®PX4 AIR®PAPR is NOT FOR USE if:
In atmospheres immediately dangerous to life or health (IDLH).
Wearer cannot escape without the aid of the respirator.
Atmosphere contains less than 19.5% oxygen.
In abrasive blasting applications.
For protection against hazardous gases (e.g., carbon monoxide).
Contaminants are in excess of regulations or recommendations.
Contaminants or contaminant concentrations are unknown.
PROTECTION PROVIDED AND LIMITATIONS
Improper selection, fit, use, or maintenance of this product can result in
injury; life threatening delayed lung, skin or eye disease; or death.
This product is intended for occupational use in accordance with applicable standards or
regulations for your location, industry, and activity (see Employer Responsibilities, page 7).
Familiarity with standards and regulations related to the use of this protective equipment is
recommended, even if they do not directly apply to you. If self-employed or if used in a non-
occupational setting, refer to Employer Responsibilities and Product User Safety Instructions. Go
to rpbsafety.com/importantsafetyinformation/ for helpful links to OSHA and other content.
Employers: Read this manual and the respirator head-top Instruction Manual and carry out the
Employer Responsibilities (page 7).
Product users: Read this manual and the respirator head-top Instruction Manual and follow the
Product User Safety Instructions (page 9).
Check website for updates. Product manuals are regularly updated.
Visit www.rpbsafety.com/resources/for the most recent version of this manual before using the
product.
IMPORTANT SAFETY INFORMATION
WARNING

5
Work area is poorly ventilated.
The temperature is outside the range of 14°F to 131°F (-10°C to +55°C). If the internal battery
temperature reaches 140°F (60°C) the unit will completely shut down.
Flammable or explosive atmosphere is present. This system contains electrical parts that
are not suitable for use in such environments. The PX4 AIR®is not intrinsically safe.
AIR SOURCE
Powered Air
Check that the contaminated area is within the limits of use for a Powered Air Purifying Respirator
and determine the type of contamination. Once the contamination level has been confirmed
you can then determine the filter cartridge to be used for the application, to make sure that you
are sufficiently protected. Make sure that the area is well ventilated and that regular air samples
are taken to confirm the atmosphere stays within the levels recommended by OSHA and other
governing bodies.

6
PX4 AIR®
FIGURE 1.1
1. RESPIRATOR
HELMET/
HOOD
ASSEMBLY
2. BREATHING
TUBE
ASSEMBLY
3. AIR SUPPLY
PX4 AIR®
RESPIRATOR COMPONENT DIAGRAM
The RPB®PX4 AIR®is part 3 of the 3 main
components that constitute a powered air
purifying respirator. (Note the T-Link®has
been used in the above diagram as an
example.)
NIOSH - CAUTIONS AND LIMITATIONS
Powered Air
A. Not for use in atmospheres containing
less than 19.5 percent oxygen.
B. Not for use in atmospheres immediately
dangerous to life or health.
C. Do not exceed maximum use
concentrations established by regulatory
standards.
F. Do not use powered air-purifying
respirators if airflow is less than four
cfm (115 lpm) for tight fitting face pieces
or six cfm (170 lpm) for hoods and/or
helmets.
I. Contains electrical parts that may cause
an ignition in flammable or explosive
atmospheres.
J. Failure to properly use and maintain this
product could result in injury or death.
L. Follow the manufacturer’s User’s
Instructions for changing cartridges,
canister and/or filters.
M. All approved respirators shall be
selected, fitted, used and maintained
in accordance with MSHA, OSHA, and
other applicable regulations.
N. Never substitute, modify, add or omit
parts. Use only exact replacement parts
in the configuration as specified by the
manufacturer.
O. Refer to user’s instructions, and/or
maintenance manuals for information
on use and maintenance of these
respirators.
P. NIOSH does not evaluate respirators for
use as surgical masks.
S. Special or Critical User Instructions and/
or specific limitations apply. Refer to
“S-Special or Critical User Instructions”
on page 15 before donning.

7
EMPLOYER RESPONSIBILITIES
Your specific responsibilities may vary by location and industry, but in general RPB®expects that
employers will:
Follow all applicable standards and regulations for your location, industry, and activity.
Depending on your location and industry, a number of standards and regulations may apply
to your selection and use of respirators and other personal protective equipment. These may
include such things as federal (e.g., OSHA, MSHA, Canadian Occupational Health and Safety),
local (e.g., state, provincial), or military standards and regulations and consensus standards
such as ANSI and CSA. There are also requirements specific to particular contaminants, e.g.
silica (see rpbsafety.com for more information), asbestos, organic pathogens, etc. Know which
requirements apply to your location and industry.
Have appropriate safety programs in place.
Have and follow:
 A workplace safety program.
 A written respiratory protection program in accordance with applicable standards and
regulations (e.g., OSHA 29 CFR 1910.134; ANSI/ASSE Z88.2; CSA Z94.4, etc.).
In accordance with the above,
Perform a hazard analysis and select appropriate equipment for each activity. A
hazard analysis should be performed by a qualified person. Controls should be in
place as appropriate and a qualified person should determine what kind of respiratory,
face and eye, head, and hearing protection is appropriate for the intended activities
and environments of use. (For example, select a respirator appropriate to the specific
airborne hazards, with consideration of workplace and user factors and with an Assigned
Protection Factor (APF) that meets or exceeds the required level for employee protection,
select welding face and eye protection appropriate to the type of welding to be done, etc.)
As applicable, check your workplace safety program, respiratory protection program, and
standards and regulations for your activity or industry for related protection requirements,
and see this manual (Protection Provided and Limitations, page 4) and the head top
Instruction Manual for product specifications.
Be sure employees are medically qualified to use a respirator.
Have a qualified physician or other licensed health care professional (PLHCP) perform
medical evaluations using a medical questionnaire or an initial medical examination per
OSHA 29 CFR 1910.134.
Train employees in the PX4 AIR®’s use, maintenance, and limitations.
Appoint a qualified individual who is knowledgable about the RPB®PX4 AIR® per ANSI/
ASSE Z88.2 guidelines to provide training:
8.1 Qualifications of the Respirator Trainer. Anyone providing respirator training shall:
a) be knowledgable in the application and use of the respirator(s);
b) have practical knowledge in the selection and use of respirator(s) and work practices
at the site;

8
PX4 AIR®
c) have an understanding of the site’s respirator program; and
d) be knowledgable of applicable regulations.
Train each PX4 AIR®user in the product’s use, application, inspection, maintenance, storage,
fitting, and limitations in accordance with the content of this Instruction Manual and the
approved head top Instruction Manual and standard or regulatory requirements. Ensure that
each intended user reads both these manuals.
Ensure that equipment is properly set up, used, and maintained.
Make sure that equipment is properly set up, inspected, fitted, used, and maintained,
including selection of the appropriate air filter cartridge for the application.
Measure and monitor airborne contaminants in the work area.
Measure and monitor airborne contaminant levels in the work area in accordance with
applicable requirements. Make sure work area is well ventilated.
Exposure limits for mixtures:
The American Conference of Government Industrial Hygienists (ACGIH) publishes a Guide
to Occupational Exposure Values and also documentation for Threshold Limit Values and
Biological Exposure Indices.
The information supplied by ACGIH provides formulas and information to calculate the
exposure level of the atmosphere. This helps to determine the appropriate respirator category
required for protection against all contaminants present. Check the ACGIH publications to help
determine the right protection for your application.
If you have any questions, contact RPB®.
Call Customer Service Department at:
Tel: [phone] or
Email: [e-mail]
Web: rpbsafety.com
EMPLOYER RESPONSIBILITIES CONTINUED

9
PRODUCT USER SAFETY INSTRUCTIONS
BEFORE INITIAL USE - BE TRAINED AND MEDICALLY QUALIFIED
Do not use this device until you have read this manual and the approved head top Instruction
Manual (additional copies available at www.rpbsafety.com) and been trained in the respirator’s
use, maintenance, and limitations by a qualified individual (appointed by your employer) who is
knowledgable about the RPB®PX4 AIR®PAPR.
Do not wear this respirator until you have passed a medical evaluation using a medical
questionnaire or an initial medical examination by a qualified physician or other licensed health
care professional (PLHCP).
Allergens: No known common allergens are used in this product.
Some materials could cause an allergic reaction in susceptible individuals. If you have a known
allergy or develop irritation, inform your employer. Irritation may occur from lack of cleaning.
Following all cleaning and care instructions provided in the instruction manuals for this and any
other RPB®products you are using.
MAKE SURE THE SYSTEM IS READY FOR USE
Make sure you have a complete system. The PX4 AIR®is only one component of a NIOSH
approved respirator system. Verify that you have all required components for the PX4 AIR®to
serve as a complete NIOSH approved respirator:
Respirator Head-top Assembly
Breathing Tube Assembly
PX4 AIR®PAPR
See Respirator Component Diagram (page 6). See the instruction manual and approval label for
the selected head top for NIOSH approval with the PX4 AIR®and the assigned protection factor.
Use only authentic RPB®brand parts and components that are part of the NIOSH approved
respirator assembly. Using incomplete or inappropriate equipment, including the use of counterfeit
or non-RPB®parts, can result in inadequate protection and will void the NIOSH approval of the
entire respirator. Do not modify or alter any part of this product.
Inspect all components daily for signs of damage or wear and tear that may reduce the level
of protection originally provided, see Inspection and Cleaning (p. 24) for details. Remove any
damaged component or product, including any belt, breathing tube, or front cover of the PAPR,
from service until repaired or replaced. Damaged components should be replaced with genuine
RPB®brand replacement parts. Replace HE filter when they are visually dirty, filter media is
damaged, or the airflow is reduced. Inspect the prefilter and the spark arrestor for damage or
blockage. Inspect the inside of the respirator for respirable dust or other foreign objects. Keep the
inside of the respirator clean at all times.
Make sure that the PAPR is correctly assembled in the configuration that suits your application.
Never use the respirator without a HE filter in place depending on the application. It is
recommended that a prefilter always be used. For applications that produce sparks or high heat,

10
PX4 AIR®
use the FR (Fire Retardant) specific model of the PX4 AIR®with the FR belt and spark arrester.
The PX4 AIR®must always be used with the correct filter(s), the front cover and the prefilter
cover to form a complete system. An incomplete system could provide inadequate respiratory
protection. See Respirator Setup and Care (page 12).
VERIFY THAT YOU HAVE THE APPROPRIATE EQUIPMENT FOR YOUR ACTIVITY
Verify that the PX4 AIR®provides appropriate protection for your activity. As applicable, check
your workplace safety program, respiratory protection program, and standards and regulations for
your activity or industry. (See PROTECTION PROVIDED AND LIMITATIONS, page 4.)
BEFORE DONNING THE PX4 AIR®:
Verify airborne contaminants are within recommended limits for respirator use:
Determine the type and level of contamination. Verify that airborne contaminant
concentrations do not exceed those allowed by applicable OSHA, EPA, or NIOSH
regulations and recommendations for powered air purifying respirators or supplied air
respirators.
Select the correct filter cartridge for the contamination and application:
PAPR: Once the contamination level has been confirmed, determine the correct filter
cartridge to be used for the application, to make sure that you are sufficiently protected.
Make sure the area is ventilated and monitored:
Make sure that the area is well ventilated and that regular air samples are taken to
confirm the atmosphere stays within the levels recommended by OSHA and other
governing bodies.
If you have any questions, ask your employer.
DO NOT ENTER THE WORK AREA if any of the following conditions exist:
Atmosphere is immediately dangerous to life or health.
You cannot escape without the aid of the respirator.
Atmosphere contains less than 19.5% oxygen.
If flammable or explosive atmosphere is present. This system contains electrical parts that
are not suitable for use in such environments. The PX4 AIR®is not intrinsically safe.
Contaminants are in excess of regulations or recommendations.
Contaminants or contaminant concentrations are unknown.
Work area is poorly ventilated.
The work area is a confined space (unless proper measures are taken).
The temperature is outside the range of 14°F to 131°F (-10°C to +55°C).
LEAVE THE WORK AREA IMMEDIATELY IF:
Any product component becomes damaged.
Vision is impaired.
PRODUCT USER SAFETY INSTRUCTIONS CONTINUED

11
Airflow stops or slows down, or alarm sounds. Do not use Powered Air Purifying Respirators if
airflow is less than 6 cfm (170 lpm).
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.
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 according to 29 CFR 1910.146 and ANSI/
ASSE Z117.1. For more information on respirator types refer to annex A.2 of ANSI/ASSE Z88.

12
PX4 AIR®
RESPIRATOR SETUP AND CARE
UNPACKING
Inspect the package contents for shipping damage and ensure all components are present.
BATTERY PACK
To reduce the risk of battery fire or explosion or electric shock with
the charger, follow these precautions and procedures:
Before charging
Allow the battery to cool before charging if it feels hot.
Inspect the battery pack before each time it is charged. If there are any cracks or damage do
not charge the battery pack.
Inspect the charger and power cords before use. Replace if any parts are damaged. Do not
substitute, modify or add parts to the chargers. Do not attempt to service the chargers. There
are no user-serviceable parts inside.
Use only the provided charger and cord.
Where to charge
Charge only:
indoors,
in a dry area,
away from sources of heat,
away from anything that can burn if exposed to heat or flame,
in a well-ventilated place,
where the charger can be monitored and easily observed during charging.
Battery care
Do not use the battery outside the recommended temperature limits 14° F to 131° F
(-10° C to 55° C).
Do not charge the battery outside the recommended temperature limits 32° F to 113° F
(0° C to 45° C).
Do not store the battery outside the recommended temperature limits 14° F to 113° F
(-10° C to 45° C).
Do not disassemble. Do not immerse in water or other liquids.
The battery can short if the contacts are accidentally connected by metal other than the PX4
AIR®or the charger. The protections built into the battery will make the battery test strip lights all
turn off and appear as if there is no charge. To reset the battery, place the battery on the charging
station. The battery will be good to use again.
Disposal
Dispose of battery packs according to local regulations. Do not crush, disassemble, dispose of in
standard waste bins, in a fire, or send for incineration. Failure to properly dispose of battery packs
may lead to environmental contamination, fire or explosion.
WARNING

13
To remove the battery from the charging
station, press the release latch on the bottom
of the battery and lift the battery from the
station.
Follow the indicators from left to right on the
front of the charging station to know the status
of the charge process. The triangle warning
light will indicate when there is a problem
charging. When all three lights display green,
the battery is fully charged.
FIGURE 2.3 FIGURE 2.4
Fit the battery to the charging station by
connecting the left side and rotate the battery
down and latch into place.
Connect the Power Pack to the charging
station. Connect the Power Pack to the Mains
Electrical Source (110 - 240v), charging will
begin.
CHARGING THE BATTERY PACK
FIGURE 2.1 FIGURE 2.2

14
PX4 AIR®
RESPIRATOR SETUP AND CARE CONTINUED
FILTERS
High Efficiency (HE) Filter
Use the HE filter in atmospheres that contain only solid or liquid particulates, such as dusts,
mists, or fumes.
Before unpacking the 03-985 HE filter, make sure that the sealed plastic packaging is still intact.
Once the seal is broken the filter is exposed to the environment and may become contaminated.
Before inserting the filter make sure that the following points are checked:
1. Check the fan unit is switched off and the fan is not running before opening the door of the
unit.
2. Inspect the filter for tears or any sign of damage to the filter media.
3. Inspect the seal on the back side of the filter is clean and free of cuts or distortions.
Service Life of HE Filter, Prefilter and Spark Arrestor
The HE filter should be replaced if the airflow alarm is activated, or the flow indicator reading
falls below the 6cfm (170 slpm) minimum airflow. The HE filter should also be replaced if there is
damage to the filter media, such as a tear or puncture, etc., or the filter media becomes wet. The
PX4 AIR®is approved to only be used with genuine RPB®filters and cartridges.
The Prefilter is recommended to be replaced when it is dirty or damaged or at the same time
as the HE Filter. The Spark Arrestor should be replaced if it becomes damaged or clogged with
debris.
The battery has a power capacity indicator
showing the level of charge from 20% to
100%, press the test button to reveal the
result.
Now attach the battery to the RPB®PX4 AIR®
by connecting the left hand edge to the base
of the unit and rotate up into position, making
sure that the latch snaps into place.
FIGURE 2.5
FIGURE 2.6

15
Mount the 03-985 HE Filter into the Door,
note the logo on the front of the Filter should
be to the bottom.
Slide the Door on to the hinge block on the
right side of the fan unit as you face it, rotate
the door to the left and latch in place.
In environments with sparks, such as welding
or grinding, use the 03-982 Spark Arrestor in
front of the 03-981 Prefilter. This will reduce
the risk of fire.
A 03-981 Prefilter is mounted in front of the
03-985 HE filter to prolong the life of the
Filter.
HIGH EFFICIENCY FILTER
FIGURE 3.1 FIGURE 3.2
FIGURE 3.3 FIGURE 3.4

16
PX4 AIR®
TO REMOVE THE HE FILTER
Make sure the 03-911 fan unit is switched off
before attempting to open the Door. (Note:
Press and hold button to power off.) If the
unit is on, contaminants may get pulled into
the unit and the suction may make it hard to
remove the filter.
(1.) Depress the latch, (2.) Rotate the door to
the right and lift the door off the latch.
1.
2.
Remove the 03-985 filter from the Door and
dispose of it in a suitable way.
Install the new replacement 03-985 filter
as per Fig 3.3 and 3.4. Inspect the 03-981
Prefilter and replace as needed.
FIGURE 4.1 FIGURE 4.2
FIGURE 4.3 FIGURE 4.4
Depending on the contaminants filtered by the PX4 AIR®, the
used filter itself may be hazardous. Take appropriate precautions when handling to avoid
exposure to released contaminants; a company disposal procedure may needed.
WARNING
FILTER REMOVAL
RESPIRATOR SETUP AND CARE CONTINUED

17
Now take the bayonet end, insert the
connection into the PX4 AIR®and make sure
the 2 small pegs line up with the slots in the
PX4 AIR®outlet.
Twist the breathing tube clockwise a ¼ turn
to lock into position. Make sure that it is fully
locked in position.
BREATHING TUBE
Select the flexible breathing tube that suits
your respirator head-top (check that the fitting
connects to your respirator type).
Take the end that fits to the respirator and
connect it securely.
FIGURE 5.1 FIGURE 5.2
FIGURE 5.3 FIGURE 5.4

18
PX4 AIR®
POWER OFF: Press and hold the power
button (for about 1 second) and the unit will
turn off.
The power button is on the right side of the
unit as you look at the front of the PX4 AIR®.
POWER ON: Press and hold the power button
(for about 1 second). Note the unit will always
start up in the low speed setting and should
reach nominal flow within 5-10 seconds.
Allow the unit to warm up for 5 minutes or
until the flow meter (04-091) is in the safe
range before use, so that there is sufficient
air flow.
POWER BUTTON AND BATTERY INDICATION
The top row of green lights indicate the
charge of the battery. 3 lights is fully charged.
1 light means the battery is getting low. When
it is time to change or charge the battery,
there will be 1 light flashing alternately green
and red.
When the battery is out of charge the top
row of lights will flash red and the alarm
will sound. Immediately return to a safe
environment and remove the respirator and
change/charge the battery.
FIGURE 6.1
FIGURE 6.2
FIGURE 6.3 FIGURE 6.4
RESPIRATOR SETUP AND CARE CONTINUED

19
Speed Settings: Cycle through the 3 speed
settings by pressing the Power Button. Each
button press will advance through these
speed settings.
Speed 1 - 170 slpm
Speed 2 - 210 slpm
Speed 3 - 240 slpm
FAN SPEED AND AIR BLOCKAGE INDICATION
Normal - Speed 1
Mild Blockage - Speed 1
Moderate Blockage - Speed 1
Heavy Blockage - Speed 1
Blocked - Speed 1
cannot be achieved
Normal - Speed 2
Mild Blockage - Speed 2
Moderate Blockage - Speed 2
Heavy Blockage - Speed 2
cannot be achieved
Blocked - Speed 1
cannot be achieved
Speed ~ 170 slpm Speed ~ 210 slpm
Normal - Speed 3
Mild Blockage - Speed 3
Moderate Blockage - Speed 3
cannot be achieved
Heavy Blockage - Speed 2
cannot be achieved
Blocked - Speed 1
cannot be achieved
Speed ~ 240 slpm
The blue lights indicate the selected fan speed. The red lights indicate the level of blockage.
When the lights flash red and blue, the selected fan speed cannot be reached, but sufficient air
supply (170slpm) can still be reached. When 3 lights flash red, the alarm will sound indicating
insufficient air supply is being produced. Return to a safe environment and check the filter and/or
the airway for blockage. If the filter is contaminated, replace with a new cartridge.
When the alarm sounds it is recommended that you leave the work area immediately. Do not
remove the respirator, remove the filter, or disconnect the breathing tube while in the work
area. Once outside of the work area power the unit down and resolve the problem.
OPERATION LEGEND
FIGURE 6.5
FIGURE 6.6

20
PX4 AIR®
LOW AIRFLOW ALARM A continuous alarm sounds when the airflow to the hood falls
below the minimum requirement of 6cfm (170slpm) for more
than 5-10 seconds in duration.
Leave the work area to check the filter for blockage or
anything obstructing the air path to the head-top. If the filter
is blocked due to contaminants, replace the filter with a new
one.
LOW BATTERY CHARGE
ALARM
A pulsing alarm sounds when approximately 10-15 minutes
of charge is left in the battery. Leave the work area. Power
the unit off and remove the battery and place on the charger,
if you have a second battery you can connect it to the device
to continue operation. The pulsing alarm will also sound
if the battery is overheating. If the unit is operated outside
this temperature range for 10 minutes the battery alarm will
activate.
Alarm volume is 85 dBA at 4” (104mm).
ALARMS TABLE 1.1
RESPIRATOR SETUP AND CARE CONTINUED