Automatic Switch Valve (Asv) With Warning Signal; Air-Tightness And Function Test With Two Self-Contained Compressed Air Breathing Apparatus; Cleaning; Note On Storage - MSA DSL Serie Manual De Instrucciones

9.4.

Automatic Switch Valve (ASV) with Warning signal

9.4.1 Air-tightness and Function Test with Two Self-contained Compressed Air Breathing Apparatus

Connect the lung governed demand valve to the ASV (Fig. 2 -> Connection "4"). Switch the positive pressure
lung governed demand valve to the standby position, not the demand position.
•
Connect the medium pressure line from the first breathing apparatus (PA 1) to the ASV
(Fig. 2 -> Connection "3".
• Open cylinder valve PA 1: Warning signal at the ASV must be activated.
•
Connect the medium pressure line from the second breathing apparatus (PA 2)
(Fig. 2 -> Connection "1".
• Open cylinder valve PA 2: The ASV switches; the warning signal must stop.
•
Close the cylinder valves of both breathing apparatus.
•
Read the pressure gauge of the breathing apparatus.
The minimum pressure is 270 bar for 300 bar cylinders and 180 bar for 200 bar cylinders
• Close the cylinder valves on the breathing apparatus.
•
The ASV with the breathing apparatus is air-tight if the high pressure drop at each breathing apparatus is
no more than 10 bar after 1 minute.
• Vent the apparatus using the lung governed demand valve, the ASV warning signal should sound briefly.
9.5.

Cleaning

If necessary, soiled parts of the apparatus should be cleaned externally after use, using lukewarm water. Do not
immerse the pressure reducer in water. See Instructions for the use of components for individual cleaning
regimes -Mask, Lung governed demand valve etc.
Any remaining moisture should be dried off at a maximum temperature of 50°C. Do not use organic solvents such
as cellulose thinners, alcohol, methylated spirits, trichloroethylene etc.
Important
Do not allow the inside parts of the pressure reducer or ASV to become wet. This can impair the
function of the pressure reducer/ASV. Therefore, the pressure reducer/ASV should be sealed (e.g.
by putting on seal caps, then cleaning at high pressure or at a medium pressure of about 2 bar).
Clean the outside of the compressed air supply hoses if necessary.

10. Note on Storage

Compressed air line breathing apparatus should be stored at about 20°C in a dry place free of dust and dirt. The
devices should also be protected from direct sunlight.

11. Malfunctions

Since human lives may depend on fault-free functioning of the compressed air line breathing apparatus, the
apparatus must, if there is a malfunction (such as excessive breathing resistance, leaks, etc.), be checked out by
a trained service technician for respiratory protection equipment, or by MSA.
DSL Series
Note on Storage
GB
25