Spasciani RC Manual Del Usuario página 18

Connect the Cylinder valve to the pressure reducer through the high pressure tube. Tighten the connector by
hand or as appropriate.
7.2 Connecting demand valve (Quick connectors operation)
Snap the medium pressure demand valve and reducer tubes together.
Connector is securely locked.
N.B.: To disconnect apply a slight axial force whilst sliding back the female connector bush. Do not
disconnect when the hose is under pressure!
Press button (17) to avoid air leaks when donning the set.
7.3 Checking the positioning of RC hoses
The medium pressure hose of the Demand valve shall be connected to the tip of the feeding hose and this to
the supporting belt.
N.B.: Do not operate unless the feeding tube is correctly hung to the waist belt!
7.4 Checking cylinder pressure
Lock demand valve by pushing button (17). Open cylinder valve; the pressure gauge should read not less
than 190 bar, for 200 bar cylinder, or not less than 280 bar for 300 bar cylinder.
7.5 Checking the high pressure section tightness
Shut cylinder valve, the Gauge shall not drop by more than 20 bar within one minute.
7.6 Checking the audible warning
• Open cylinder valve and pressurise the set.
• Shut cylinder valve.
• Release the valve locker (17) by pushing rubber button (4).
• With the palm of your hand, keep the demand valve outlet shut and vent the air off slowly.
At pressure reading of approx. 55+/-5 bar, release the air quickly. A sounding vibration shall then be
heard which will end when the air has been completely vented off.
N.B.: It is advisable to vent the air off very slowly and wait few seconds at 55 bar .
• Re-lock button (17)
Note: When doing this check it is recommended to connect the demand valve directly to the second
operator attachment (25) on the reducer. This eliminates the dead volume due to the length of the
hose which may give misleading test results.
8. DONNING THE SET
•
Wear the supporting strap around the waist and lock the hose into the special hook.
•
Don the mask and check the face seal tightness (see relevant instructions).
•
Open hand wheel valve(s) by at least two turns.
•
Connect the Demand valve to the mask; the first breath-in releases button (17) and sets the positive
pressure in the mask cavity.
N.B.: The connection to the mask of the demand valve shall be made and checked by an assistant.
Note: The set is now ready for use
8.1 During Use
When in use check from time to time the pressure gauge and plan the work load to suit the air left in the
cylinder(s). Be aware that at 55+/-5 bar the audible warning will sound at every inhalation. At this point the
user should leave the contaminated area.
If in strenuous conditions more air is required, you may press the Rubber Button (4).
With a 7 litre cylinder the b.a. can last for some 10 minutes after the warning has started. With a 50 l
cylinder the alarm time will be approx 90 min.
8.2 Replacing a cylinder
The system is designed to enable changing a cylinder at a time when the apparatus is in use.
To do that:
•
Close the cylinder valve
•
Vent the air off by opening the relief valve at the end of the high pressure connecting
tube(29)
•
Disconnect the connector by hand or as appropriate
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