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APPENDIX A
RECHARGE - DRY CHEMICAL EXTINGUISHER
13.
Make certain nitrogen cylinder regulator Ii
present at 210 psi (1448 kPa) or lower before
opening nitrogen cylinder valve. Open nitrogen
cylinder valve and set regulator pressure at 210
psi (1448 kPa). Press lever and pressurize with
dry nitrogen. Release lever. Extinguisher
gauge pointer should be in the GREEN
operating range. If not, replace the gauge by
referring to page 13 of the Appendix.
CAUTION: The
pressure
gauge
on
the
extinguisher should not be used to
determine whether the intended
charging
pressure
has
been
reached. Use the calibrated gauge
on
the
Recharge
System
to
determine if the correct pressure is
being applied.
14.
On models with plastic pull pins. insert a new
pull pin until the barb locks it in place. On
models with metal ring pins, reinsert the ring pin
and install a new visual inspection seal. Then,
remove the recharge adaptor.
15.
Also. on metal ring pin models or when
replacing plastic pull pins with metal, check that
there is 1/16 in. (1.6 mm) minimum clearance
between the top of the valve stem and the push
lever. If there is not sufficient clearance,
replace with plastic pull pin (see Parts List).
16.
Test for leakage using LEAK-TEC FORMULA
177 or equivalent. Observe gauge 24 to 48
hours after recharge. There should be no loss
of pressure. If gauge shows a pressure loss,
raise the pressure and retest for leakage.
17.
Inspect hose and nozzle for obstructions or
other mechanical damage.
18.
Reinstall hose and/or nozzle.
A8-3
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