Voyager IV
Nitrox System
Nuvair www.nuvair.com
Page
25
Only provide Scuba cylinder Nitrox fills to customers who have proof of Nitrox training and
certification. Improper use of Nitrox can be fatal.
This system is not cleaned for oxygen service and not all components are
compatible with gas mixtures containing greater than 40% oxygen. Pumping
gas mixtures containing greater than 40% oxygen will lead to explosions which
may cause severe personal injury or death.
Each Scuba cylinder belonging to a customer must be analyzed by that customer at the Nitrox
filling facility, using an oxygen analyzer independent of those used with the Nitrox System.
An employee must witness that the customer has properly analyzed the gas in each cylinder,
noted the maximum operating depth for that mixture, and signed and dated the fill log. The
time of day must also be included with the date, since some customers may fill the same
cylinder more than once a day.
15.3
Pumping Nitrox
1) When filling a Scuba cylinder, follow all industry standards. Do not exceed rated pressure of
cylinder, and do not exceed 3600 psi (250 bar) under any condition.
2) With fill whip bleed valve open and Nitrox flowing, verify that Fill Oxygen Analyzer %O
2
reading
equals the desired Nitrox %O
2
.
3) Close bleed valve, open cylinder valve, and fill cylinder. Monitor system for proper operation:
a) Monitor Oxygen Analyzers and recalibrate as required
b) Listen for proper operation of automatic condensate drains every 10-15 minutes.
c) Monitor all system gauges as shown in the table below.
The Oxygen Analyzers may require re-calibration after 10-20 minutes of operation due to
humidity and temperature change effects on the Sensor. To recalibrate, turn off the LP Feed
Air Switch and follow calibration instructions.
When the HP Compressor auto drain engages and dumps condensate, the Fill Oxygen
Analyzer reading will decrease momentarily due to the pressure drop in the system. It will
return to its previous reading within seconds after the auto drain sequence stops.
