PN 05605
04/2020
NOTE: Proper procedure for recharging any dry chemical extinguisher includes the use of a
closed recovery system (NFPA 10). Getz Equipment offers several systems ideal for this
application that provide for the recovery of the remaining agent by direct discharge into
the system, trapping the
“
fines
”
while allowing the nitrogen to escape and provides a more
accurate fill of the extinguisher.
IF A
“
CLOSED
-
RECOVERY SYSTEM
”
IS NOT AVAILABLE PROCEED AS FOLLOWS:
1. To depressurize:
a.
Close the nitrogen cylinder valve.
b.
Carefully tip extinguisher over until it rests on both wheels and handle. (In this position much of the
agent will remain in the cylinder.)
c. Open nozzle valve slowly to clear hose of any remaining pressure and chemical (be prepared for a
recoil and discharge of agent.)
d. Insure that all pressure has escaped before further disassembly.
e. Stand extinguisher upright after complete depressurization.
2.
Complete steps 1
-
6 of Maintenance Procedures. Carefully remove the fill cap. Detach discharge hose
from the agent cylinder and the nozzle assembly from the hose. Blow out any chemical remaining in the
hose. While performing this procedure, all parts and seals shall be cleaned, inspected, and replaced
where necessary.
3.
Remove shutoff nozzle assembly from discharge hose and clean thoroughly. Check to make sure that the
valve is closed when the lever is in the forward position (toward the nozzle tip).
4.
Detach hose from nitrogen cylinder, install the shipping cap, unscrew the wing nuts, and remove the
nitrogen cylinder from the extinguisher.
5.
Remove the
50’
discharge hose from the storage rack, and disconnect the hose from the agent cylinder
fitting. Blow out any dry chemical agent remaining in the hose. Clean hose –
remove and discard the
hose gasket from the female coupling.
6.
Remove remainder of ruptured moisture seal from the agent cylinder fitting. Replace with new Moisture
Seal Assembly.
Carefully follow the installation instructions on the Moisture Seal Assembly
package.
7.
Remove the agent cylinder fill cap and gasket. Clean fill cap threads and vent port, lubricate the cap
gasket, and set parts aside. Check the condition and type of any remaining chemical (replace any dry
chemical that is contaminated or caked). Fill extinguisher with the type and amount of dry chemical shown
on the extinguisher nameplate (label) –
verify gross weight. Clean agent cylinder collar threads. Install the
fill cap and tighten securely.
WARNING: DO NOT OVERFILL THE EXTINGUISHER. THIS COULD CAUSE A MALFUNCTION. DO
NOT MIX TYPES OF AGENTS –
THIS CAN CAUSE A DANGEROUS PRESSURE BUILD
UP AND REDUCE EXTINGUISHER EFFECTIVENESS.
8.
Install the proper nitrogen cylinder (pressurized to 2015 psi, 13.89 MPa), remove the shipping cap, place
on the extinguisher, and attach the nitrogen hose.
9.
Reattach the discharge hose to the extinguisher (tighten hand tight plus a ¼ turn). Properly coil the hose
onto the storage rack (see page 11). Reattach the shutoff nozzle firmly to the hose, and store it in the
mount with the shutoff lever in the
closed
(forward) position.
10.
Record the service date on the inspection tag, and place the extinguisher in its proper location.