2-10 PREPARATION FOR CHARGING.
The following instructions apply only to the charging of Halon and nitrogen into
fire extinguisher cylinders that have been evacuated in accordance with paragraph
2-9 of this manual.
In accordance with EPA environmental law, do not vent Halon into the atmosphere.
Inlet pressure gauge on the control panel reads minus 20 psi (minus 138 kPa)
(vacuum) to plus 600 psi (4137 kPa). Outlet pressure gauge on the control panel
reads 0-2,000 psi (0-13789 kPa).
Connect the Halon tank adapter assembly with gauge (1000 psi) located in tool box, to the Halon supply cylinder.
Then connect Halon hose to the adapter assembly.
Connect the air compressor to the quick-disconnect fitting on the air filter, below and to the left rear of the control
panel. Adapt the supplied female quick-disconnect fitting to the air hose as required. Compressor must supply a
minimum of 15 cfm of air at 150-175 psi (1034 to 1206 kPa).
Verify that the shift valve located on top of on the pump is open (two stage position).
Verify that all valves on the control panel are in the OFF position.
Verify that all other valves and ports on the hoses, fire extinguisher and Halon cylinder are closed.
Connect nitrogen monitor adapter assembly with gauge (1500 psi), located in tool box, to the extinguisher hose
using the quick disconnect fitting.
2-10.1 For the M1 Tank or any Cylinder with a Schrader Valve. (Refer to Figure 2-7.).
Sudden release of compressed gases may cause severe injury to personnel. Do
not deviate from approved procedures. Wear safety goggles or face shield, gloves
and hearing protection when working with pressurized equipment. Perform
operating procedures in a well ventilated area. Accidental Halon leaks remove
oxygen from the air. Suffocation can occur.
Before starting the charging procedure on any M-1 or Schrader valve fire
extinguisher cylinder, make certain the safety pin and antirecoil cap are in place
and the cylinder has a hydrostatic test date not more than 5 years old. Reject any
cylinder that does not satisfy both criteria. Serious injury could result from doing
Connect the Schrader valve adapter, located in tool box, to the nitrogen monitor adapter assembly. The Schrader
valve adapter has a 370 bend at one end.
Start the compressor. Adjust the air inlet regulator on the Recovery / Recharger Unit to 140 psi (965 kPa).