Amerex 05614 - Manual (Page 5)

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5. Check the gauge on the nitrogen cylinder. If the pressure is below 1700 psig (11.7 mPa) repressurize the
cylinder to 2015 psig (13.9 mPa) or replace it. A low gauge pressure may indicate leakage. Check for
leaks. A low gauge reading may also result from low temperature. See the temperature/pressure
relationship chart in the Troubleshooting Guide. Check the tamper indicator (lockwire seal) on the
nitrogen valve and replace if necessary.
6. Wheeled extinguishers – Inspect the wheels to insure they rotate freely. Lubricate as required.
Stationary extinguishers – Check to insure that any mounting fixtures are secure.
WARNING: ALWAYS OPEN THE SHUTOFF NOZZLE HANDLE SLOWLY. ANY PRESSURE IN
THE AGENT CYLINDER WILL CAUSE THE EXTINGUISHER TO DISCHARGE. BE PREPARED FOR
A POSSIBLE DISCHARGE AND NOZZLE RECOIL. ANY EVIDENCE OF AGENT IN THE NOZZLE
INDICATES THAT THE UNIT MAY HAVE BEEN USED AND THE USE NOT REPORTED.
7. Disconnect the discharge hose from the agent cylinder. Check the couplings, hose and hose gaskets for
damage or deterioration
– replace as necessary.
8. To perform an operational integrity check on the discharge hose and nozzle combination:
a. Connect the test kit hose adapter to the female end of the discharge hose.
b. Close the discharge nozzle shut-off lever and properly secure it.
c. Connect a properly regulated and verified nitrogen pressure source, set to the extinguisher
operating pressure (235-245 psi) to the test kit hose adapter.
d. Slowly pressurize the discharge hose/nozzle assembly to the extinguisher operating pressure and
check for leaks or distortion.
e. Operate the nozzle lever to ensure proper operation and to clear the hose of any obstructions. If
hose is obstructed - refer to Troubleshooting Guide.
f. Close the nitrogen pressure source and slowly relieve remaining pressure by fully operating the
nozzle lever.
9. Remove the agent cylinder cap and examine it closely for any signs of damage, cracks or thread wear.
Clean the agent cylinder fill cap threads and thread vent port on the cap with a stiff bristle nylon brush.
Remove the fill cap gasket and check for wear, cracks or tears
– replace if necessary. Lightly lubricate
the gasket with Visilox and reinstall.
10. Examine the dry chemical agent for proper type and condition. Replace chemical that is contaminated,
caked or other than the type indicated on the nameplate (label) do not trust the height of the chemical in
the cylinder when determining agent fill. Dry chemical settles and the only true indication of agent fill is to
weigh the extinguisher and compare with the weight indicated on the nameplate (label).
11. Place the service kit Vent Spacer on top of the agent cylinder fill opening collar. Check again to see that
the fill cap thread vent is clean and that the agent fill cap gasket is in place. Install the agent fill cap
securely over the vent spacer.
CAUTION: (STEP 12) 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 performing the
siphon tube clearing and gas tube integrity checks.
12. To perform a siphon tube clearing and gas tube integrity check:
a. Remove the service kit Agent Hose Adapter from the discharge hose assembly and install it
securely onto the agent cylinder siphon tube outlet.
b. Using a regulated nitrogen pressure source set to the extinguisher operating pressure, slowly and
briefly pressurize the agent cylinder (the siphon tube should be clear within a couple of
seconds and the agent cylinder pressure slowly vent from the fill cap thread vent).
Pressure and/or dry chemical agent leaks from the gas tube inlet port (where the hose connects)
will indicate a defective gas tube and will require that the agent cylinder be emptied and the gas
tube replaced.
c. Close the nitrogen pressure source and allow all pressure to slowly vent from the thread vent port
on the fill cap.