User's Manual

Maintenance
September 2013 6-2 P/N 81-CO2MAN-001
6-3 INSPECTION PROCEDURES - MONTHLY
1. Make a general inspection survey of all cylinders and equipment for damaged or missing
parts. If any equipment requires replacement, refer to Paragraph 6-7.
2. Ensure that access to hazard areas, remote nitrogen or cable pull stations, discharge
nozzles, and cylinders are unobstructed and there are no obstructions to the operation of
the equipment or distribution of carbon dioxide.
3. Inspect flexible actuation hoses for loose fittings, damaged threads, cracks, distortion,
cuts, dirt and frayed wire braid. Tighten loose fittings. Replace hoses having stripped
threads or other damage. If necessary, clean parts as directed in Paragraph 6-6.3. Inspect
flexible actuation hose adapters for stripped threads and damage. Replace damaged
adapters. Inspect couplings and tees for tightness. Tighten if necessary. Replace damaged
parts.
4. Inspect control heads attached to CO
2
cylinders, nitrogen cylinders, stop valves and time
delays for physical damage, deterioration, corrosion, distortion, cracks, dirt, and loose
couplings. Tighten loose couplings. Replace damaged or missing caps. Replace control
head if damage is found. If necessary, clean as directed in Paragraph 6-6.3. Ensure that
all control heads, actuation devices, etc. are all in the “set” or “closed” position with the
locking pin installed and seal wire intact.
5. Inspect carbon dioxide cylinder and valve assembly for leakage, physical damage such as
cracks, dents, distortion, and worn parts. Check safety disc for damage, and replace if
necessary. If necessary, clean cylinder and associated parts as described in
Paragraph 6-6.3.
6. Inspect cylinder straps, cradles, and attaching hardware for loose, damaged, or broken
parts. Check straps and associated parts for corrosion, oil, grease, grime, etc. Tighten
loose hardware. Replace damaged parts. If necessary, clean as directed in
Paragraph 6-6.3.
Table 6-1. Preventive Maintenance Schedule
Schedule Requirement
Reference
Paragraph
Monthly Inspect hazard area system components Paragraph 6-3
Check nitrogen cylinder pressure Paragraph 6-3
Semi-Annually Check CO
2
cylinder weight Paragraph 6-4
Test electric control head Paragraph 6-4.3
Test pressure switch Paragraph 6-4.4
Verify odorizer cartridge Paragraph 6-4.5
Annually Check nitrogen cylinder pressure Paragraph 6-5.1
Check CO
2
cylinder weight Paragraph 6-5.1
Blow out distribution piping Paragraph 6-5.2
Perform complete system function Paragraph 6-5.3
Test pneumatic detection system Paragraph 6-5.4
Every 5 years Hydrostatic test all CO
2
and nitrogen system hoses and flexible
connectors.
Paragraph 6-6
Every 5 or 12 years CO
2
cylinder hydrostatic test Paragraph 6-6.1
N
2
cylinder hydrostatic test Paragraph 6-6.1