Recovery / Recharger Unit, Fire Extinguisher.
47.0 in (119.4 cm)
47.0 in (119.4 cm)
74.25 in (118.6 cm)
518 lb. (235.0 kg)
SAFETY. CARE. AND HANDLING.
Before you operate the Recovery / Recharger Unit or perform maintenance, read and fully understand the WARNINGS
located on the inside front cover.
SECTION III. TECHNICAL PRINCIPLES OF OPERATION
LOADING AND INVERTING THE HALON CYLINDER.
The Halon cylinder is lifted and placed on the tilt rack assembly (11, figure 1-1) using the hoist winch assembly (1). The
hoist winch assembly cable is attached to the D-rings of the cylinder lifting harness using the spring hook provided. The
winch is then operated by turning a handle clockwise to lift the cylinder. The winch is provided with an automatic brake to
hold the load and prevent the handle from freewheeling. The tilt rack assembly provides a balanced mounting surface for
the Halon Cylinder to simplify inversion of the cylinder. The Halon cylinder is inverted so that Halon liquid, rather than
vapor, is available for pumping to the fire extinguisher.
EXTINGUISHER RECOVERY AND CHARGING.
1-15.1 General. The Recovery / Recharger Unit as shown in Figure 1-1 may be used to remove Halon and nitrogen from
an extinguisher cylinder by creating a minus psi reading at the cylinder valve and placing the extracted materiel in a
recovery cylinder. Or it may be used to pump Halon into empty extinguisher cylinders by pumping Halon from a Halon
cylinder and creating a positive pressure at the cylinder valve. All necessary valves, hoses, and gauges come as part of
the Recovery / Recharger Unit. The Halon cylinder, nitrogen cylinder and the recovery cylinder are not part of the
recharging unit. Detailed procedural steps are in Chapter 2.
1-15.2 Recovery. The recovery of Halon and nitrogen from an extinguisher is accomplished by pumping the extinguisher
contents from the extinguisher to a recovery cylinder. The Halon hose is connected to the recovery cylinder and the
extinguisher hose to the extinguisher. The UNIT OPERATION valve is placed in the RECOVERY position, the
HALON/NITROGEN valve in the HALON position and the pump started (given that all appropriate valves are open) and
the process continues until a minus 5 psi reading is observed on the INLET PRESSURE gauge. At that time all valves are
closed, the PUMP control placed in the OFF position, and all other controls in the OFF position.
1-15.3 Charging. To charge an extinguisher the Halon hose is connected to the Halon cylinder and the nitrogen hose to
the nitrogen regulator which is connected to the nitrogen cylinder. The extinguisher hose, with nitrogen monitor adapter
and fire extinguisher adapter, is connected to the extinguisher, which is secured in the agitator bracket. The
HALON/NITROGEN valve is placed in the HALON position and the UNIT OPERATION valve in the CHARGE position.
When all appropriate valves have been opened the PUMP control is placed in the ON position and Halon pumped into the
extinguisher until the correct weight is reached. All valves are closed or placed in the OFF position. The
HALON/NITROGEN valve is placed in the NITROGEN position, the UNIT OPERATION valve in the CHARGE position,
and the nitrogen regulator set to the pressure specified for the ambient temperature. When the nitrogen monitor pressure
gauge reaches the pressure according to the ambient temperature (same as nitrogen regulator pressure setting) the
procedure is halted. The extinguisher is shaken and if the pressure reading drops the nitrogen pressure