Amerex 16672 - Manual (Page 7)

7
COMPLETE MAINTENANCE (SIX YEAR MAINTENANCE) PROCEDURES
1. Complete items 1 through 11 in Maintenance Procedure above.
2. Attach the appropriate recharge adapter (P/N 09857) to the extinguisher operating valve on the extin-
guisher cylinder. Empty the extinguisher of all pressure and Halotron l using an Amerex P/N 14538
Halotron l Recharge Kit and a bulk Halotron l supply cylinder with sufficient empty capacity to accept
the contents of the extinguisher.
3. When extinguisher is empty of all agent and pressure, remove valve assembly and disassemble by
removing downtube, spring and valve stem assembly. Discard valve stem assembly and collar o-
ring.
NOTE: Keep cylinder opening covered while devalved to minimize interior corrosion.
4. Thoroughly clean all parts of the disassembled valve with a soft bristle brush or soft cloth. Blow the
valve out with dry nitrogen.
5. Install a NEW valve stem assembly (GREEN SEAL) after lightly lubricating the valve stem o-ring with
Bluestar V-711 (do not lubricate the valve stem seal). Reassemble the spring and downtube. Care-
fully install a NEW collar o-ring (GREEN) which has been lightly lubricated with Bluestar V-711. Set
the valve assembly aside.
6. Inspect the cylinder interior following CGA Visual Inspection Standard C-6. If a hydrotest has been
performed or any moisture is evident, the cylinder should be immediately warm air dried.
7. Clean the o-ring seating groove in the cylinder neck. If any rust is evident, remove by using a fine
emery cloth (200 grit). Clean the surface and lubricate the entire sealing area with a thin film of
Bluestar V-711. Install the valve assembly in extinguisher cylinder. Hand tighten firmly.
8. Complete the Recharge steps, items 2 through 11.
RECHARGE
WARNING:
a. Halotron l service should be performed only in a well ventilated room by a properly
trained service technician wearing proper eye protection and rubber gloves.
b. Before attempting to recharge be sure this extinguisher is completely depressurized by
slowly and carefully depressing the operating lever and discharging the extinguisher into
a proper collection area.
c. Use a REGULATED pressurizing source of ultra high purity ARGON ONLY. Set the
regulator to no more than 25 PSI higher than the extinguisher gauge operating pressure.
d. 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.
e. Never leave an extinguisher connected to a regulator of a high pressure source for an
extended period of time. A defective regulator could cause the cylinder to rupture due
to excessive pressure.
RECHARGING (NFPA 10) is the replacement of the extinguishing agent (also includes the expel-
lant for this type of extinguisher).