Bullard EVA - Manual (Page 2)

2
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
PA1AFI Air Flow Indicator (sold separately)
2. The battery pack (Part No. EVABAT1). One fully charged pack will power the blower
for approximately four to ten hours depending upon factors such as speed, cartridge
selected and cartridge loading.
3. The breathing tube, which is available in two different types and
three lengths:
PAHT Powered Air Hood Breathing Tube Assembly (standard length)
PAHTXS Powered Air Hood Breathing Tube Assembly (short length)
PAHTXL Powered Air Hood Breathing Tube Assembly (long length)
PA1BT Hood breathing tube assembly with clamp (standard length)
PA1BTXS Hood breathing tube assembly with clamp (short length)
PA1BTXL Hood breathing tube assembly with clamp (long length)
PA20LFBT Loose fitting facepiece breathing tube assembly (standard length)
PA20LFBTXS Loose fitting facepiece breathing tube assembly (short length)
PA20LFBTXL Loose fitting facepiece breathing tube assembly (long length)
4. The High Efficiency Particulate Absolute (HEPA) filter or chemical filter cartridge.
5. The hood with headband suspension (except for the RT Series) and/or hard hat, or
loose fitting facepiece. The following hood models may be used with the EVA Series
blower unit:
GRH/GRHT Grinding hood with inner bib
RT1/RT1T Hood with long inner and outer bib (NIOSH approved for use without a
headband suspension)
RT2/RT2T Hood with long inner and outer bib (NIOSH approved for use without a
headband suspension)
RT3/RT3T Hood with long inner and outer bib (NIOSH approved for use without a
headband suspension)
RT4/RT4T Hood with long inner and outer bib (NIOSH approved for use without a
headband suspension)
20TJ/20TJT Hood
20TIC/20TICT Hood with inner bib
20TICH/20TICHT Hood for use with Bullard hard hat
20TICS/20TICST Hood with taped and sealed seams
20SIC/20SICT Hood with taped and sealed seams
20SICV/20SICVT Hood with taped and sealed seams and PVC lens
20SICH/20SICHT Hood with taped and sealed seams for use with Bullard hard hat
20SICVH/20SICVHT Hood with taped and sealed seams and PVC lens for use with
Bullard hard hat
20TPC/20TPCT Hood with solvent resistant lens and inner bib
20TP/20TPT Hood with solvent resistant lens
20LFM Loose fitting facepiece, medium size
20LFL Loose fitting facepiece, large size
20LF2M Loose fitting facepiece (narrow profile), medium size
20LF2L Loose fitting facepiece (narrow profile), large size
20LF2S Loose fitting facepiece (narrow profile), small size
6. The Battery Charger:
EVASMC Quick charger (single port)
EVAGC Gang charger (six port)
The blower unit draws in ambient air through the cartridges. The purified air is blown
into the wearer’s hood 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 seven cubic feet
of air per minute (210 liters per minute) in the hood under normal use on the standard
speed setting, and eight and one-half cubic feet of air per minute (241 liters per
minute) in the hood 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 ten 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 falls below approximately 170 lpm (6.0 CFM) and a 77db
intermittent chirp alarm will activate to indicate that the battery has approximately 15
minutes of remaining capacity.
Type C Airline Respirators
CC20 Series (TC-19C-154),
RT Series (TC-19C-412), GRH Series (TC-19C-412)
Most of the same headpieces approved for use with the CC20, RT, and GR50 Series
of supplied air respirators (SAR) are also approved for use with the EVA Series of
powered air-purifying respirators. CC20, RT and GR50 Series respirators provide a
high level of respiratory protection and user comfort over long work periods, in a wide
variety of hazardous environments.
The CC20, RT and GR50 SAR air flow control devices and other components are
described in the CC20, RT and GR50 Series User Instructions.
Battery Pack
One fully charged battery pack will power the blower for approximately four to eight
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. (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 EVASMC2 charger user manual (upon special
order).
Battery
release
Figure 1 Figure 2