Quantcast HALON / NITROGEN RECOVERY PROCEDURES (cont) - TM-5-4210-218-13P_36

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Page Title: HALON / NITROGEN RECOVERY PROCEDURES (cont)
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Figure 2-7.  Control Panel Layout.
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HALON / NITROGEN RECOVERY PROCEDURES (cont) - TM-5-4210-218-13P_37
TM 5-4210-218-13&P CAUTION The   Halon   transfer   pump   is   not   to   be   operated   where   the   working   pressure exceeds 1000 psi.  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. I. When the inlet pressure gauge on the control panel shows a minus 5 psi (minus 34 kPa) (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 OPERATION valve from RECOVER to OFF. n. Place the HALON/NITROGEN valve in the OFF position. o. Close the ball valve on Halon hose at recovery cylinder. p. Turn off the pump by rotating the PUMP valve 90 degrees clockwise to the OFF position. WARNING When opening or closing the fill valve, be certain that the entire valve is not being loosened from the fire extinguisher.  Halon could escape and cause injury or death. q. Close the fill valve on the fire extinguisher by rotating the small hex nut clockwise until securely closed. r. Disconnect   the   extinguisher   hose   adapter   from   the   fill   valve   on   the   fire   extinguisher   and   remove   empty extinguisher from agitator bracket. s. After all fire extinguishers are processed, place all valves on the hoses, control panel and the recovery cylinder in the closed or OFF position. t. Stop the compressor. u. Remove extinguisher adapter from extinguisher hose and place in tool box. v. Disconnect Halon hose from recovery cylinder and air compressor hose from air filter. w. Remove extinguisher support bracket from agitator bracket and place in tool box. x. Stow hoses in approved manner. 2-19

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