SENTRY Carbon Dioxide Hand Portable Fire Extinguishers
Operation, Inspection, Service and Maintenance,
and Recharge Manual (Part No. 429425)
2018-OCT-11 REV. 05 PAGE 7
MAINTENANCE
MAINTENANCE
If a questionable condition exists, refer to Service and Repair
section, pages 11-12.
NOTICE
Become familiar with the Service and Repair
section prior to performing maintenance.
To help provide maximum assurance the extinguisher
will operate effectively and safely, maintenance must be
conducted annually, or sooner when specifically indicated by
an inspection:
!
CAUTION
Always be alert for any indications of damage or inoperative-
ness in the extinguisher. No manual can anticipate everything
that could happen to an extinguisher. In the event something
not covered in the manual is found, ascertain whether any
potential for damage or effect on operation of the extinguisher
or safety exists and repair or replace, as necessary.
1. Make certain extinguisher is in its designated place,
readily accessible and immediately available in the event
of fire.
2. Remove extinguisher from its wall hanger. Check to see
that hanger is firmly fastened to mounting surface.
NOTICE
Extinguishers taken out of service
for maintenance or recharge shall be
replaced by spare extinguishers of the
same type and at least equal rating.
3. Clean extinguisher to remove dirt, grease and foreign
material.
4. Check cylinder for date of manufacture. If five years or
more have passed since most recent date stamp, cylinder
must be hydrotested before returning to service. Date
will appear as month (i.e., 3 = March, 8 = August, etc.)
followed by the in spector’s stamp and then year (last two
digits). See Figure 1.
FIGURE 1
006531
5. Weigh the unit.
6. Inspect tank for corrosion, abrasion, or dents in accor-
dance with CGA Visual Inspection Standards, Pamphlets
C-6 and C-6.1.
7. Visually inspect extinguisher for missing, substituted
or broken parts. Only SENTRY replacement parts are
allowed.
8.
10 lb, 15 lb, or 20 lb Extinguishers Only:
Remove and
inspect horn/hose assembly as follows:
a. Using open end wrench, disengage hose from valve.
b. Check hose assembly for any blockage.
c. Perform conductivity test on hose by attaching one
lead of an ohmmeter to one hose coupling and other
lead to opposite hose coupling. With meter set in ohms
range, reading should show approximately 0 ohms,
indicating a complete circuit exists through hose. See
Figure 2. If meter indicates an open circuit, hose must
be replaced.
FIGURE 2
002814
d. Do not install hose to valve at this time.
