Bullard EVA Series User Manual - Www.Bullard.Com
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Principle o
f Oper
ation / Battery P
ack
EVA Series - Principle of Operation
The EVA Series Powered Air-Purifying Respirator (PAPR) System is configured
in six parts:
1. The blower and belt assembly:
EVA1 Blower Unit
EVABELT1 Comfort/Decon Belt
PA4AFI Air Flow Indicator (sold separately)
2. The battery pack (Part No. EVABAT2). One fully charged pack will power the
blower for approximately four to six hours depending upon factors such as
speed, cartridge selected and cartridge loading.
NOTE
The EVABAT2 is green and is not for use with Loose Fitting Hoods or Loose
Fitting Face Pieces.
3. The PAFAMBT Mask breathing tube assembly (standard length)
4. The High Efficiency Particulate Absolute (HEPA) filter.
5. The Half Face Mask:
The following models may be used with the EVA Series blower unit:
FAM2S (Small)
FAM2M (Medium)
FAM2L (Large)
6. The Battery Charger:
EVASMC Quick charger
EVAGC Gang charger
The blower unit draws in ambient air through the cartridge. The purified air
is blown into the wearer’s mask through the breathing tube. A flow indicator
is provided to check that there is an adequate volume of air available to the
wearer prior to use. The system is designed to operate at a minimum air flow
of approximately 4.5 cubic feet of air per minute (128 liters per minute) in the
mask under normal use on the standard speed setting, and 5 cubic feet of air
per minute (142 liters per minute) in the mask under normal use on the high
speed setting. A feedback loop from the Mass Flow Sensor to the impellor
continually monitors and adjusts the air flow to keep it constant at the design
set point.
The units are designed for use at temperatures from 10ºF to 120ºF
(-12ºC to 49ºC).
The battery pack mounts in a compartment on the back of the blower. A fully
charged battery pack will power the blower for approximately four to six hours
depending upon factors such as speed selected, cartridge selected, and filter/
cartridge loading.
The EVA Series Blower is equipped with two alarms: A 77 db continuous
alarm will sound when the air flow reaches approximately 115 lpm and a
77db intermittent chirp alarm will activate to indicate that the battery has
approximately 15 minutes of remaining capacity.
Type C Airline Respirators
The FAMB Half Face Mask used with the EVA PAPR can also be configured
for use in Supplied Air Configurations. Refer to the FAMB Series Supplied Air
Respirator User Instructions for details.
Battery Pack
One fully charged battery pack will power the blower for approximately four to
six hours depending upon factors such as speed selected, cartridge selected
and filer/cartridge loading.
NOTE
The battery has built-in short circuit protection. In the event of a short
circuit, an internal polyfuse will trip. The fuse will reset itself within 5-10
seconds allowing the battery to resume normal operation.
To charge the battery pack, do the following:
• Press the battery release on the pack to remove the battery from the back
of the blower. (See Figure 1.)
• Place battery upside down into the charging port of the battery charger.
(See Figure 2.)
• Connect the battery charger to a 110-volt AC electrical outlet.
• Charge the battery pack for approximately four hours.
While the battery is charging, the light on the charger will remain red. The
charger light will illuminate green when charging is complete.
Table-top gang chargers EVAGC with 6 ports are also available.
Diagnostic functions are available for chargers (upon special order) including
access to data such as number of cycles of operation, remaining charge
capacity, etc. Details for these functions are available in the charger user
manual (upon special order).
Battery
release
Figure 1
Figure 2