8
Three perforated cover lenses (replacement, see 8.2)
The blast helmet should never be used without the inner lens, outer lens and
cover lenses in place.
(3) Belt
Attach the air control valve to the belt.
(4) Breathing air line
Screw the breathing air line coupling to the air inlet of the helmet.
Attach the other end to the air control valve.
Never carry the blast helmet by the air line but always use the handle to avoid
damage to the air line.
(5) Air supply line
Attach the air supply line to the air control valve using the quick coupling.
Attach the other end of the line to the air filter, either CPF-20 or CPF-80 (more
than one operator).
5 Air Supply
The air supply to the blast helmet is a critical element of operator safety and is not included in the
scope of delivery. Please read this section with particular care. Poor air quality may result in
illness or death of the operator (see 2.2).
5.1 Air quality
The quality of the air supply is critical and very important for ensuring the safety and wellbeing of the
operator. Particular attention must be paid to ensuring that the equipment is not accidentally connected to
other gas supplies, e.g. oxygen, acetylene or nitrogen.
Never connect the breathing air line to an air source that has not been tested for gas or particulate
contamination.
Do not use a piston compressor (oil bath) to generate the breathing air as there is a strong risk it
may produce high carbon monoxide concentrations.
The presence of excessive carbon monoxide concentrations may result in the opera
tor’s death.
The breathing air must meet the following requirements:
The air supply must comply with
EN 12021
.
The breathing air for the blast helmet must contain at least
19.5 % by volume oxygen
.
Before using the helmet, please read the owner’s manual, all instructions and labels, and all
warnings concerning the
compressed air source
. Please observe the compressor
manufacturer’s statements/warnings concerning the use of the compressor.
If using an oil-lubricated compressor for the air supply, a high temperature monitor and/or a
carbon monoxide alarm should be fitted. If only a high temperature monitor is fitted, the air
must be regularly tested for the presence of carbon monoxide.
The user is responsible for
testing the breathing air,
the compressor, the carbon monoxide alarm, the air filter and
the wearing parts.
An overheated or poorly maintained compressor may produce carbon