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EVAHL Series Hazardous Location Powered Air-Purifying
Respirator Blower Assembly User Manual
3
Battery P
ack / Pr
e-Oper
ational Inspection
Battery Storage
Storage of Li Polymer batteries is relatively easy. Unlike Nickel batteries, they lose a very
small amount of power (less than 0.5% per day) and therefore can be charged and stored
ready for use. If long-term storage is required, it is best to store the battery in a cool
place not below -5ºC/23ºF with at least 40% charge still remaining.
NOTE
Discharging and re-charging the battery fully at least once every 3 months is
suggested to ensure the longest possible life of the battery. Do not leave on the
charger for more than 30 consecutive days.
To maximize battery life, these guidelines should
be followed:
• Remove the battery from the blower unit when not in use.
• Charge the battery before it is completely discharged. The low battery alarm indicates
that the battery needs to be charged. The battery is designed 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.
• Always charge the batteries at room temperature or cooler. At higher temperatures,
the battery pack may not accept a full charge. If the battery pack feels hot, let it cool
for 30 minutes before charging.
• Do not charge battery packs in an enclosed cabinet without ventilation.
Battery Fuel Gauge:
EVAHL Battery Packs are equipped with an on-board fuel gauge to indicate the amount
of remaining capacity left in the battery pack. To check the remaining capacity, simply
depress the button labeled “Push” and LEDs
will illuminate indicating the level of battery
capacity remaining. When fully charged all
four LEDs will illuminate green, and when 25%
or less charge is available a single LED will
illuminate red.
Pre-Operational
Inspection
Prior to each work shift, perform the following Pre-Operational Inspection to ensure
proper operation and to ensure that the unit is completely assembled.
1. Belt Mounted Blower Unit, Part No. EVAHL1
• Check that the unit is clean and undamaged.
• Inspect for deterioration, physical damage and improper assembly.
2. Filter/Cartridges
• Inspect the filter/cartridge for any physical damage
• Check the label to ensure the filter/cartridge has not exceeded its
“use-by” date.
• Inspect the gasket on the filter for any phsyical damage.
NOTE
Each filter comes with a permanent gasket.
• Ensure that the correct filter/cartridge is appropriate for the contaminant.
• Consult the NIOSH approval label and your own in-plant safety professional if you
have any questions as to the suitability and efficiency of the Air-Purifying Element.
• Screw the cartridge into the port until hand-tight and the locking tab is secure. (Refer
to Mounting and Replacing Filters on Blower Unit on page 4)
3. Battery Pack
• Check that the battery is not damaged.
• Check the Fuel Gauge to determine sufficient charge is available.
• Place the battery pack in the battery compartment on the blower.
• Use flat head tool to secure the battery. (See Figure 4)
4. Hood with Suspension or Hard Hat, or Loose Fitting Facepiece
• The hood is constructed of one of the following materials: Tychem 2000 (QC) or
Tychem 4000 (SL).
• Depending on the model of the hood selected, it may be used with either a headband
suspension or a hard hat (Note: RT Series hoods are part of NIOSH approved
respirator assemblies when used without a headband suspension or a hard hat).
• The loose fitting facepiece is constructed of Tychem
2000 (QC) and features an internal suspension.
• Inspect the hood or loose fitting facepiece for any
physical damage.
Mounting the Breathing Tube on
the Blower
• Ensure that a rubber gasket is in place in the breathing
tube coupler on the blower unit.
• Screw one end of breathing tube into the blower unit.
(Hand tight is sufficient.) (See Figure 5).
• Ensure that neither the breathing tube nor the filter is
blocked.
• Ensure that the on/off Switch is in the off position.
• Switch on the blower by pressing the on/off button for 1-2 seconds confirmed by a
short beep.
• If the Low Battery Alarm sounds at this time, the
battery needs to be recharged. See instructions on
page 2 regarding properly charging the battery.
• If the Low Flow Alarm sounds at this time, the hood,
breathing tube and filter should be checked for
leakage.
Figure 3
Figure 5
Figure 4
Lock the battery release before placing the blower in service. The blower shall
not be used in a hazardous location with the release unlocked.
WARNING
