User's Manual
Maintenance
P/N 81-CO2MAN-001 6-7 September 2013
6-4.5 Verify Odorizer Cartridge
Verify the odorizer assembly as follows:
1. Remove the odorizer assembly.
2. Check to make sure the burst disc is intact.
3. Reattach the odorizer assembly. If the burst disc has ruptured, replace the odorizer
assembly.
6-5 ANNUAL MAINTENANCE
6-5.1 Equipment Inspection
Perform the procedures described in:
• Paragraph 6-3
• Paragraph 6-4
6-5.2 Distribution Piping Blow Out
Before blowing out system, remove pipe caps from the ends of the distribution piping to allow
any foreign matter to blow clear. In addition, remove any frangible discs from vent or flanged
nozzles (if installed). Blow out all distribution piping with dry air or CO
2
to make sure there are
no obstructions.
1. Remove all discharge heads from the carbon dioxide cylinders.
2. Remove all pipe caps on dirt traps from distribution piping to allow any foreign matter to
blow clear.
3. Remove all frangible discs (if installed).
4. Discharge test cylinder into system manifold. Use of CO
2
or dry air is acceptable. Discharge
duration is to be of sufficient length to insure that all piping is blown clear.
5. Reinstall all pipe caps and frangible discs as required.
6. Reconnect all discharge heads to CO
2
cylinder valves.
6-5.3 Complete System Inspection
Perform complete system inspection and test in accordance with NFPA-12. Full system
functional tests are to be performed without the need to discharge the carbon dioxide
cylinders. The full functional tests are to be conducted with all of the electric, mechanical,
pressure operated or pneumatic control heads removed from the CO
2
cylinders and/or nitrogen
pilot cylinders, as described in Paragraph 6-4.3, Paragraph 6-4.4 and Paragraph 6-5.4.
WARNING
Do not use water or oxygen to blow out pipe lines. The use of oxygen is
especially dangerous as the possible presence of even a minute quantity of oil
may cause an explosion.
WARNING
Do not disconnect discharge head(s) from flexible hose(s). Discharge of CO
2
system will cause flexible hose, without discharge head attached, to flail
violently, resulting in possible equipment damage and severe bodily injury to
personnel.