Bullard EVA Series User Manual - Www.Bullard.Com
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6
Donning the Blo
w
er/Lo
w Battery Alarm/Do
ffing the Respir
ator
Final Donning:
• Attach the other end of breathing tube to blower unit (if not already
attached) by screwing adapters together.
• Put on the belt and blower assembly and make any final adjustments to
the belt as necessary.
• Turn the blower on by depressing and
holding the on/off switch (Figure 19) 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).
• Choose speed setting (see below).
• Place the mask on the head making any final adjustments to the fit as
required at this time to ensure a comfortable and stable fit.
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 and green EVABAT2 is installed, the blower
will operate at approximately 5.0 cfm=142 lpm.
NOTE
The battery life is reduced at the higher speed.
Pressing the on/off switch will change the speed to approximately
4.5 cfm = 128 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.
Low Battery Alarm and Low Flow Alarm
The EVA1 Blower unit is equipped with a Low Battery Alarm and a
Low Flow Alarm.
The Low Battery Alarm will sound an intermittent 77 dba electronic beep
indicating that there are approximately 15 minutes of remaining battery
capacity. The delays between beeps will get shorter and shorter as time
runs out.
The Low Flow Alarm will sound a continuous 77 dba electronic beep indicating that
the flow to the mask has dropped to the design specification of
115 lpm = 4.0 CFM (Note: The NIOSH minimum required flow is 115 lpm=4 CFM).
Low Battery Alarm and Low Flow Alarm
(continued)
When either of these alarms sounds, the user should immediately do
the following:
Leave the hazard area
Remove the headpiece
Disconnect the breathing tube from the mask
Check the airflow with the airflow indicator (see page 4).
If the airflow indicator indicates insufficient airflow, the battery should be
fully charged (see “Battery Pack” on page 2), and/or the filter/cartridge
should be replaced.
NOTE
The EVA1 blower is provided with a circuit to protect the battery. It will
not allow the battery to be discharged below a safe voltage for the cells,
regardless of airflow, without the Alarm sounding. When the battery
reaches the voltage cutoff it will automatically cease operation. When
the Low Battery Alarm sounds and the filter cartridge is not clogged, the
battery should be recharged to protect the battery and thereby prolong
the working life of the unit. If the ball in the Airflow Indicator is BELOW
or PARTLY BELOW the PASS LINE with a fully charged battery, the filter
cartridge may need to be changed.
Doffing the Respirator
Prepare to doff the blower, battery and mask in a safe, hazard-free area and
do the following (in conjunction with your employer’s standard operating
procedures):
• Remove the mask
• Turn the blower off by holding down the on/off switch for 5 seconds. This is
confirmed by a long beep and a shut down of the motor.
• Remove the waist belt.
• Disconnect the mask from the breathing tube.
• Disconnect the breathing tube from the blower.
• Clean and inspect components as necessary.
• Place battery on charger (as desired).
• Place components in storage.
Figure 19
on/off switch
Do not enter a hazardous area until you are sure that the blower and mask 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
The use of any filter/cartridge not approved with the EVA1 blower unit may
put the user at risk and could result in death or serious injury.
WARNING