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LOCATION AND DESCRIPTION OF MAJOR COMPONENTS (cont)
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TM-5-4210-218-13P Air Conditioner Vertical Compact 6 000 BTU Manual
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EXTINGUISHER RECOVERY AND CHARGING (cont)
TM 5-4210-218-13&P I. Recovery / Recharger Unit, Fire Extinguisher. Length 47.0 in (119.4 cm) Width 47.0 in (119.4 cm) Height 74.25 in (118.6 cm) Weight (shipping) 518 lb.  (235.0 kg) 1-13 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 1-14 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. 1-15 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 1-7

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