Charging The Cylinders - MSA G1 SCBA Operating Manual

Cylinder Band Diameter
H60
5500-30
5500-45
5500-60
(6) Close the latch mechanism until the buttons lock in position.
(7) To make sure the cylinder is secure, put one hand on the backplate and grasp the cylinder valve
assembly with the other hand. Try to pull the cylinder down and out from the carrier. Make sure
the cylinder band and latch hold the cylinder securely in the carrier.
NOTE: If the cylinder is loose, make sure the latch is engaged in the correct slot on the cylinder band.
(8) Make sure the latch is tightened fully. Do not use the SCBA if the cylinder is not held securely in
the carrier.
(9) Attach the handwheel assembly to the cylinder valve assembly.
• Threaded connect
a) Make sure there is an O-ring on the stem of the handwheel assembly and that it is not
damaged. If necessary, replace the O-ring.
b) Install the handwheel coupling nut on the cylinder valve assembly.
c) Make sure the handwheel is hand-tight (tools are not necessary).
• Quick-connect
a) Make sure there is no dirt or debris on the male and female fittings of the coupling.
b) Push the quick-connect fitting onto the cylinder valve adapter until there is an audible snap.
The handgrip will turn rapidly approximately 45 degrees counterclockwise, indicating that the
valve is connected to the pressure regulator.
c) Grasp the handwheel firmly and pull on it to make sure it is attached securely.

12.5 Charging the Cylinders

(1) Connect the cylinder to the filling system.
NOTE: For cylinders with quick-connect adapters: Unless the filling system has been adapted for the
quick-connect coupling, remove the quick-connect adapter before filling cylinder.
(2) Refill the cylinder until the pressure reaches the maximum service pressure.
(3) Let the cylinder cool to room temperature.
(4) If necessary, when the cylinder is at a temperature of 70°F (21°C), top it off to reach the maximum
service pressure.
(5) Close the valves on the cylinder and the filling system.
(6) Disconnect the cylinder from the filling station.
(7) 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.
b) If there is leakage, remove the cylinder from service.
Slots
13, 14, 15
1
5
10
G1 SCBA 2018 Edition
Cylinders
US
71