
58
Warning device calibration check (9)
X
X
X
Mask/demand valve threaded connector
check by go/no go gauge
X
Demand valve membrane replacement
X (5)
X (8)
Tilt valve replacement
X
Demand valve o-ring replacement
X
Demand valve clamping springs
X
O-ring of the pressure reducer/cylinder
connector replacement
X
Cylinder connector filter replacement
X
General overhaul
X
Legenda:
(1)
As indicated in paragraph 10.1 of this manual.
(2)
Even in the absence of use, unless it is stored in a hermetically closed
packaging.
(3)
As shown in section 8.1 of this manual.
(4)
Following the charging of the cylinder.
(5)
For equipment used constantly.
(6)
As shown in section 8.2 of this manual.
(7)
After use in harsh environments or extreme conditions.
(8)
For equipment not used.
(9)
As shown in section 8.3 of this manual.
(10)
Check that the opening and closing of the valve is correct.
(11)
Through reference manometer.
(12)
In particular, the components listed in paragraph 13.2.
Those who wish to provide independently to complex maintenance please contact
the company D.P.I. s.r.l. for the necessary information. The D.P.I. s.r.l. regularly
organizes theoretical and practical training of technical staff for the maintenance
of their own breathing.
More general information on maintenance can be found on the UNI 11439: "
Self-
contained open-circuit compressed air positive pressure breathing apparatuses
-
Maintenance Guidelines".
Below is a troubleshooting table list of possible malfunctions with possible causes
and remedies.
Malfunction
Possible cause
Remedy
The mask is not air tight
The gasket on the connector is
missing or is damaged
Replace the gasket
The exhalation valves are
leaking
Remove traces of dirt or
replace
The harness is not tightened
Tighten the harness
High pressure leakage
The O-ring on the pressure
reducer to cylinder connector is
missing or damaged
Replace
Air flow from the medium pressure
safety relief valve
Malfunction of the pressure
reducer
Send for maintenance
Insufficient whistle of the warning
device
Traces of dirt on the whistle
Clean
EN
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