Charging Cylinders - MSA G1 SCBA Operating Manual

Threaded connect:
Before installing the threaded handwheel, check that the o-ring inside the handwheel coupling nut
is present and free of damage. If the o-ring is damaged, it must be replaced before the SCBA is
used.
Thread the handwheel coupling nut onto the cylinder threads. The handwheel should be hand-tight
(no tools).
Quick connect:
Before installing ensure there is no dirt or debris on either the male or female end of the coupling.
Ensure the adapter on the cylinder valve is tight.
Push the quick connect coupling onto the cylinder valve adapter until an audible snap is heard. The
handgrip will rapidly rotate approx. 45° counter clockwise indicating that the valve is connected to
the pressure regulator.
Grasp the handwheel firmly and pull on it to ensure the handwheel is fully attached.

12.5 Charging Cylinders

(1) Appropriately connect the cylinder to the filling system and refill.
NOTE: For quick connect cylinder, the adapter must be removed before filling unless the filling system
has been adapted for the quick connect.
(2) Terminate the filling when the pressure reaches the maximum service pressure and allow the
cylinder to cool to room temperature.
(3) If necessary, top-off the cylinder such that the service pressure is attained with the cylinder at a
temperature of 70°F (21°C).
(4) Close the valves on the cylinder and the filling system and remove the cylinder.
(5) Apply a leak solution to determine if there is any leakage between the cylinder and the valve.
a)If there is no leakage, the cylinder is ready for use.
G1 SCBA
Cylinders
US
68