SENTRY Carbon Dioxide Hand Portable Fire Extinguishers
Operation, Inspection, Service and Maintenance,
and Recharge Manual (Part No. 429425)
2018-OCT-11 REV. 05 PAGE 9
RECHARGE
RECHARGE
Before recharging any extinguisher, visually examine the
unit for any physical damage or impairment which may
further dictate the need for maintenance.
NOTICE
Extinguishers taken out of service for mainte-
nance or recharge shall be replaced by spare
extinguishers of the same type and at least
an equal rating.
1. Discharge all remaining CO
2
from extinguisher.
!
WARNING
When discharging carbon dioxide for recharge purposes,
it should always be discharged to an outside atmosphere.
The discharging of this type of extinguisher in an unven-
tilated space can dilute the oxygen supply. Prolonged
occupancy of such spaces can result in loss of conscious-
ness and possible death due to oxygen deficiency.
Always wear gloves and goggles or a face shield as CO
2
gas could cause freezing if sprayed on bare skin or in the
eyes.
NOTICE
If charging multiple extinguishers, keep the
components for each extinguisher separate.
Valve assemblies and shells are not indexed
and nameplates may not line up properly if
valve assemblies are transposed.
2. Check cylinder shoulder 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 the month (i.e., 3 = March,
8 = August, etc.) followed by the inspector’s stamp and
then the year (last two digits).
3. Remove horn/hose assembly (10-15-20 lb models) or
horn (5 lb model) as follows:
a. Horn/Hose assembly – Using open end wrench,
disengage hose from valve assembly. See Figure 5.
FIGURE 5
004993
b. Horn – Using open end wrench, disengage hex swivel
from valve assembly. See Figure 6.
FIGURE 6
004996
c. Inspect tank for corrision, abrasion, or dents in
accordance with CGA Visual Inspection Standards,
Pamphlets C-6 and C-6.1.
4. Attach proper recharge adaptor to valve.
5. Place extinguisher on scale. Attach spring clamp to hold
extinguisher valve in open position.
6. Connect CO
2
supply line to recharge adaptor.
