Short Inspection Of The Compressed Air Line Breathing Apparatus Before Use; Dsl Or Mass Compressed Air Line Breathing Apparatus; Dsl Or Mass Asv Compressed Air Line Breathing Apparatus (External Breathable Air Supply Combined With A Self-Contained Compressed Air Breathing Apparatus) - MSA DSL Serie Manual De Instrucciones

8.4.

Short Inspection of the Compressed Air Line Breathing Apparatus Before Use

8.4.1 DSL or MASS Compressed Air Line Breathing Apparatus

Air-tightness and Warning Signal Activation Pressure at the DSG or MASS Pressure Reducer
After donning the compressed air line breathing apparatus, carry out a short inspection in the following order:
 Open the compressed air supply.
 If the compressed air supply is from a compressed air cylinder: read off and check the high and medium
pressures on the pressure gauges.
 If the supply is from a breathable air network: read off and check the operating (medium) pressure on the
pressure gauge.
 Close the compressed air supply.
 If using the DSG or MASS pressure reducer:
 the compressed air line breathing apparatus is air-tight if the high pressure drop at the pressure reducer is
no more than 10 bar within 1 min.
 If the compressed air supply is from a breathable air network:
 the compressed air line breathing apparatus is air-tight if the high pressure drop at the medium pressure
gauge of the breathable air network is no more than 1 bar within 1 min.
 Carefully activate the flushing function of the lung governed demand valve until air flows out, while closing off
the outlet opening as much as possible.
 Watch the high pressure gauge at the pressure reducer.
 The warning signal must be activated at 30 bar minimum (this does not apply if the air supply is from a
breathable air network).
 Activate the flushing function again to depressurise the apparatus.
8.4.2 DSL or MASS ASV Compressed Air Line Breathing Apparatus (External Breathable Air Supply
Combined with a Self-Contained Compressed Air Breathing Apparatus)
Air-tightness and Warning Signal Activation Pressure if Breathable Air Supply is from Compressed Air
Cylinder(s) with MASS or DSG Pressure Reducer and Self-Contained Compressed Air Breathing
Apparatus
After donning the compressed air line breathing apparatus and self-contained breathing apparatus, carry out a
short inspection in the following order:
 Open the compressed air supply.
 Read off and check the high and medium pressures on the pressure gauges at the pressure reducer.
 Open the cylinder valve(s) on the self-contained breathing apparatus by making about two turns of the hand
wheel.
 Read the pressure gauge of the self-contained breathing apparatus:
 Minimum pressure 270 bar for 300 bar cylinders
 Minimum pressure 180 bar for 200 bar cylinders
 Close the compressed air supply (airline pressure reducer and self-contained breathing apparatus).
 The compressed air line breathing apparatus is air-tight if the pressure drops by no more than 10 bar within 1
min.
 Carefully activate the flushing function of the lung governed demand valve until air flows out, while closing off
the outlet opening as much as possible.
 Watch the high pressure gauge at the airline pressure reducer.
The warning signal must have activated by 30 bar.

DSL Series
Use
GB
19