EVA Series Powered Air-Purifying Respirator
Blower Assembly User Manual
WARNING
The user should ensure that the neck cuff is unrestricted all around the neck
to allow proper inflation and reduce restrictions.
Battery run time will be reduced by a restricted or improperly donned hood.
For hoods with a threaded port at the rear (designated with a “T” suffix),
Breathing Tubes PAHBT, PAHBTXS, PAHBTXL will attach to the hood by the
threading into the port at the rear (See Figure 23A).
NOTE
The RT3 and RT4 hoods have an adjustable velcro strap near the top of
the lens that allows the user to customize the curvature of the lens to
his/her personal preference. This strap may be removed if desired.
7. Make sure that the breathing tube is not twisted after donning.
8. T uck inner bib of hood into shirt or protective clothing (see Figure 26).
9. Pull respirator outer bib over collar of shirt or protective clothing. Pull the long
outer bib down on the outside of clothing and secure with tie down straps or
tape (if employer operating procedures will allow.)
Loose-Fitting
Facepiece Use
Installing Breathing
Tube Assembly in Loose-
Fitting Facepieces
1. The 20LFXL, 20LFL, 20LFM, 20LF2S, 20LF2M and 20LF2L loose-fitting facepieces
have a sewn-in breathing tube connector on the back. The PA20LFBT breathing
tube has a special connector on the hood end with bayonet type pins.
2. Insert the bayonet connector of the PA20LFBT breathing tube in the hood
connector and turn clockwise until it locks in place (see Figure 32).
Available in extra large 20LFXL, large 20LF2L or 20LFL, medium 20LF2M or 20LFM,
and small 20LF2S. Select the size that fits most comfortably and matches your head
size. Remove the protective cover from the visor. Pull the hood over your head and
adjust the headband around your head and the elasticized edge of the faceseal
under your chin. Make sure that the breathing tube is not twisted after donning.
Final Donning:
• Attach the other end of breathing tube to blower unit (if not already
attached) by screwing adapters together.
• Remove any protective film covering the lens of the headpiece.
• Put on the belt and blower assembly and make any final adjustments to the
belt as necessary, keeping the breathing tube and hood behind the head.
• Turn the blower on by depressing and holding the on/off switch (Figure 33)
for approximately 1 second indicated by a short beep.
• Buckle the belt onto the waist (blower unit should be in the lower back
of the wearer).
• Don the headpiece.
• Choose speed setting (see below).
• Place the hood on the head making any final
adjustments to the fit as required at this time
to ensure a comfortable and stable fit.
• Tuck inner bib into coveralls or shirt if using a
hood with inner bib.
Final Donning
Front
Back
CC20 Single Bib
CC20 Double Bib
RT Series
20LFL
20LF2L
GRH
Speed Selection
The EVA1 Blower is equipped with the ability for the user to select one of two
speeds for operation.
When the unit is initially turned on, the blower will operate at approximately 8.5
cfm = 240 lpm (high speed). Note: The battery life is reduced at the higher speed.
Pressing the on/off switch will change the speed to approximately
7 cfm = 198 lpm (low speed).
Pressing the on/off switch additional times will toggle the unit between the two
speeds.
NOTE
Speed change is confirmed by a short beep.
Figure 33
on/off switch
Do not enter a hazardous area until you are sure that the blower and hood are
fully operational and the blower is running. The user should periodically leave the
hazardous area to check the airflow through the system. If the low battery or low flow
alarm should sound, or if the user experiences any difficulty in breathing, or senses
any taste or any odors from the hazard, the user should leave the hazardous area
immediately. Failure to observe these warnings could result in death or serious injury.
WARNING
7
Loose-Fitting F
acepiece U
se/Final Donning/Speed Selection
Figure 32
