Amerex 05620 - Manual (Page 6)

CAUTION: STEP 15 - THE AGENT CYLINDER CAP THREADS MUST BE CLEAR AND THE CAP SECURELY INSTALLED
ONTO THE VENT SPACER AND AGENT CYLINDER TO ALLOW PRESSURE TO SLOWLY VENT AFTER PER-
FORMING THE SIPHON TUBE CLEARING AND GAS TUBE INTEGRITY CHECKS.
15. To perform a siphon tube clearing and gas tube integrity check:
a) Remove the service kit AGENT HOSE ADAPTER (P/N: 01455) from the discharge hose assembly and
install it securely onto the agent cylinder siphon tube outlet.
b) Use a regulated Argon pressure source, set to the extinguisher operating pressure (110 PSI) and briefly
pressurize the agent cylinder (the siphon tube should clear within a couple of seconds and the agent
cylinder pressure slowly vent from the fill cap thread vent). Pressure and/or dry powder leaking from
the gas inlet port, where the regulator was installed, will indicate a defective gas tube. This will require
emptying the agent cylinder and replacing the gas tube.
c) Close the Argon pressure source and allow all pressure to slowly vent from the thread vent port on the fill cap.
d) AFTER ALL PRESSURE HAS BEEN RELIEVED, SLOWLY OPEN THE FILL CAP AND -
REMOVE THE TEST KIT VENT SPACER.
e) Re-examine the Class D dry powder agent to determine if any obstructions have been cleared from the
siphon tube and have risen to the surface.
f) Clean the fill cap and agent cylinder thread surfaces. Securely install the fill cap gasket and fill cap.
16. Disconnect the service kit quick connect adapter from the low pressure port of the regulator and reinstall the
regulator securely to the agent cylinder.
17. Disconnect the high pressure hose from the Argon cylinder valve. Securely install the service kit ARGON/
NITROGEN CYLINDER PRESSURE CHECK GAUGE ASSEMBLY (P/N: 01300) to the Argon cylinder valve
outlet and verify the indicated cylinder gauge pressure. Argon pressure should conform to the temperature
correction chart provided in the TROUBLE SHOOTING section of this manual. Close the Argon cylinder valve
and disconnect the Pressure Check Gauge Assembly.
WARNING: IF THE ARGON CYLINDER VALVE HAS A “T” HANDLE QUICK OPENING OR QUICK OPEN-
ING TRIP LEVER RELEASE, THE SAFETY VENT PLUG (P/N: 01560) MUST BE INSTALLED
TO PROTECT SERVICE PERSONNEL FROM A HIGH VELOCITY DISCHARGE IN CASE THE
LEVER IS ACCIDENTALLY OPENED.
18. Install a new Amerex P/N: 7411 Moisture Seal per instructions in the package. Securely connect the discharge
hose to the extinguisher. When assembling the hose to the agent cylinder or nozzle to the hose, tighten the
coupling ¼ turn after contacting the hose gasket.
19. Coil the hose onto the extinguisher hose rack using the reverse loop procedure (see instructions later in this
manual). Install the shut-off nozzle (and/or Extension Wand) with the lever in the CLOSED (forward) position on
the mount.
20. Remove the safety vent plug from the Argon cylinder. Re-connect the high pressure hose securely to the Argon
cylinder valve. Wipe the extinguisher clean. Record the service data on the inspection tag according to NFPA-
10 requirements and attach to the extinguisher. Return the extinguisher is in its proper location.
RECHARGE
RECHARGING (NFPA-10 4-2.3) is the replacement of the extinguishing agent and also includes the expellant for
this type of extinguisher.
RECHARGE PROCEDURE
WARNING: BEFORE ATTEMPTING TO RECHARGE BE SURE THIS EXTINGUISHER IS COMPLETELY DEPRESSURIZED.
THERE IS A CHECK VALVE IN THE SYSTEM WHICH PREVENTS ARGON PRESSURE FROM
ESCAPING
FROM THE AGENT CYLINDER WHEN THE ARGON SUPPLY HOSE IS DISCONNECTED. THE AGENT CYLIN-
DER MAY BE PRESSURIZED EVEN THOUGH NO PRESSURE ESCAPES FROM THE ARGON CYLINDER HIGH
PRESSURE HOSE CONNECTION.