MSA ICU Gebrauchsanleitung Seite 7

5.2 Assembly of the ICU to the BD 88
• Prior to use, the ICU must be assembled to the compressed air
breathing apparatus. To do this, the pressure reducer must be
disassembled from the carrying plate.
• Unscrew the pressure gauge line from the pressure reducer with a
spanner wrench SW 14.
• Remove the gasket with a suitable tool (e. g. wire hook) from the
pressure gauge connection, without damaging the sealing surface.
• Insert the new gasket that is provided in the ICU 88 set into the
pressure reducer.
• Screw the pressure gauge line with the ICU into the pressure reducer
with a torque of 20 Nm.
• Reassemble pressure reducer onto carrying plate.
6 Operation and Switching Off
6.1 Putting the ICU into Operation
• The ICU is put into operation automatically when the filled
compressed air cylinder(s) is opened.
• Then the device makes a self-test to check its proper condition. Here
the LEDs blink, the display briefly shows all available symbols and
the audible signal (Beeeep, pause, beep bop bop) sounds.
• The device indicates the measured pressure on the LCD display and
the mechanical pressure gauge. It is ready for use.
• The measured pressure is indicated on the display only for the first
3 ½ minutes. Thereafter, when in use, the display automatically
switches to remaining service time as standard display.
6.2 Switching Off
• To switch off the ICU, the apparatus needs to be pressure-free. To do
this, close the cylinder valve(s) and release the pressure with the
lung governed demand valve (see Instructions for Use of compressed
air breathing apparatus).
• Afterwards the yellow button must be pushed twice within 2 seconds.
Once the device is turned off, a signal sounds (beep, pause, beep,
bop) and the LCD indicator and the LEDs turn off.
Note: The apparatus is considered pressure-free when the measured
pressure is less than 10 bar.
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