Quantcast HALON / NITROGEN RECOVERY PROCEDURES (cont) - TM-5-4210-218-13P_38

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HALON / NITROGEN RECOVERY PROCEDURES (cont) - TM-5-4210-218-13P_37
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TM-5-4210-218-13P Air Conditioner Vertical Compact 6 000 BTU Manual
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PREPARATION FOR CHARGING
TM 5-4210-218-13&P CAUTION The   Halon   transfer   pump   is   not   to   be   operated   where   the   working   pressure exceeds 1000 psi (6895 kPa).  The adapter gauge will be damaged. k. When the flow of Halon/nitrogen stops, start the pump by rotating the PUMP valve 90 degrees counterclockwise to the ON position. NOTE When   a   recovery   cylinder   pressure   reaches   900   psi   (6205   kPa)   and   must   be changed,   it   should   be   set   aside   for   a   minimum   of   24   hours.      This   will   allow contents to settle and allow input of additional Halon nitrogen mix.  This  process may  be  repeated  a  maximum  of  three  times  or  the  900  psi  (6205  kPa)  pressure  is maintained, whichever occurs first.  The recovery cylinder should be marked as to time and date of last change. l. When  the  INLET  PRESSURE  gauge  on  the  control  panel  shows  a  minus  5  psi  (vacuum),  or  the  gauge  on  the Halon hose adapter exceeds 900 psi (6205 kPa), close the ball valve on the extinguisher hose.  A reading of 900 psi (6205 kPa) requires recovery cylinder change. m. Move UNIT OPERAATION valve from RECOVER to OFF. n. Place the HALON/NITROGEN valve in the OFF position. o. Turn off the pump by rotating the PUMP valve 90 degrees clockwise to the OFF position. p. Close the fill valve on the fire extinguisher by slowly rotating the safety control valve clockwise to SET. q. Disconnect the extinguisher hose from the fill valve on the fire extinguisher cylinder. r. Remove empty fire extinguisher from the agitator bracket. s. After all fire extinguishers are processed, place all valves on the hoses, control panel, and recovery cylinder in the closed or OFF position. t. Stop the air compressor. u. Remove extinguisher hose adapter from extinguisher hose and place in tool box. v. Disconnect Halon hose from recovery cylinder and air compressor hose from air filter. w. Stow hoses in approved manner. x. If used, remove extinguisher support base from agitator bracket and place in tool box. 2-21

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