ANSUL Cartridge Dry Chemical Fire Extinguishers
Models 10, 20, 30, Operation, Inspection, Service and
Maintenance, and Recharge Manual (Form No. F-7674)
PAGE 14 REV. 10 2018-OCT-15
MAINTENANCE
MAINTENANCE (Continued)
27. Return the extinguisher to the upright position, remove
the fill cap, examine the fill opening threads for nicks,
cross-threading, corrosion or wear; and check the gasket
seating surface for nicks, gouges, corrosion or dirt depos-
its. Then, check the pressure relief vent for obstruction.
(The pressure relief vent may be a small hole or a set of
grooves in the collar. One of either type of pressure relief
vents must be present in each extinguisher.)
NOTICE
Normal Johnson Controls maintenance
procedures do not require the removal of
dry chemical from the cartridge operated
extinguishers, however, some states
require that the dry chemical be removed,
examined and returned to the extin-
guisher on an annual basis.
28. If the dry chemical agent is removed from the extin-
guisher, maintenance personnel should then visually
examine the gas tube and rubber sleeves for discrepan-
cies through the fill cap opening. If cracked, damaged, or
missing, a new gas tube assembly should be installed. (If
internal tagging is required, it is recommended that it be
attached to the upper portion of the gas tube.)
29. Once the dry chemical has settled, make certain the tank
is filled to rated capacity indicated on the nameplate. (An
approximate visual indication of 1 in. to 3 in. (25 mm to 76
mm) from the bottom of fill opening is acceptable.) Ensure
that the extinguisher is filled with free-flowing ANSUL dry
chemical of the type specified on the extinguisher name-
plate.
30. Remove the flat gasket and quad ring from the fill cap.
Then thoroughly clean the fill cap threads and gasket
seating surface with a stiff bristle brush. (If the fill cap
has pressure relief vent grooves, be sure they are unob-
structed.)
31. Examine the fill cap for abrasions, cracks or corrosion
and the fill cap threads for nicks, burrs, cross-threading,
rough or feathered edges. If the fill cap is the ANSUL
indicator type, grasp the indicator stem and gently move
the stem up and down to check for free movement. Refer
to the ‘‘Fill Cap’’ Service Instructions in the Service and
Repair Section of this manual for corrective action.
32. Examine the fill cap gasket and quad ring for cuts,
checks, deformities and wear and then stretch them to
determine elasticity.
28
003217
27
003216
30
003179a
29
003218
32
003263
31
003219
Summary of Contents for ANSUL 10
Page 2: ......
