Amerex 18764 - Manual (Page 9)

Manual 18764 Rev - Page 9
7. VERIFY THAT NO PRESSURE REMAINS IN THE EXTINGUISHER (Operating valve and nozzle
shutoff in open position and there is no discharge). Remove and inspect the agent fill cap for damage or
distortion.
8. Check the nozzle shutoff lever for freedom of movement (open and close several times). If the
operation is impeded, disassemble the nozzle, replace parts and/or properly lubricate as necessary.
Make sure that the nozzle tip is clear and unobstructed.
9. Disconnect the discharge hose from the operating valve. Blow air through the hose and nozzle
assemblies to insure that the passage is clear of foreign material. Check the couplings, hose and hose
gasket for damage or deterioration - replace as necessary.
10. Check cylinder mounting assembly for loose nuts, bolts, frame distortion or damage. Check welds for
damage or corrosion. Replace damaged parts or make repairs as necessary.
11. Remove operating valve assembly. Inspect for corrosion or damage to hose thread connection.
Visually inspect the safety disc assembly on the discharge valve for obstruction or damage.
WARNING: VALVE REMOVAL AND/OR VALVE PART REPLACEMENT SHOULD BE MADE ONLY
AFTER COMPLETING THE DEPRESSURIZING PROCEDURES LISTED IN STEP 1 OF THE
COMPLETE MAINTENANCE PROCEDURES.
13. Complete steps 2 thru 15 of RECHARGE PROCEDURE.
RECHARGE
RECHARGING is the replacement of the extinguishing agent and also includes the expellant gas for this
type of extinguisher.
WARNINGS:
A. BE SURE THE EXTINGUISHER IS COMPLETELY DEPRESSURIZED BEFORE ATTEMPTING TO
RECHARGE.
B. NEVER HAVE ANY PART OF YOUR BODY OVER THE EXTINGUISHER WHILE REMOVING THE
VALVE ASSEMBLY OR FILL CAP.
C. USE A PROTECTIVE SHIELD BETWEEN YOU AND THE PRESSURE GAUGE WHILE CHARGING
AN EXTINGUISHER. DO NOT STAND IN FRONT OF THE GAUGE IF A SHIELD IS NOT AVAILABLE.
D. USE A REGULATED PRESSURIZING SOURCE OF DRY NITROGEN ONLY WITH A MINIMUM
DEW POINT OF MINUS 70°F (MINUS 57°C). SET THE REGULATOR TO NO MORE THAN 275 PSI.
E. CHECK AND CALIBRATE REGULATOR GAUGE AT FREQUENT INTERVALS. THE REGULATOR
GAUGE SHOULD BE USED TO DETERMINE WHEN THE INTENDED CHARGING PRESSURE HAS
BEEN REACHED. DO NOT USE THE EXTINGUISHER GAUGE FOR THIS PURPOSE.