User's Manual
Maintenance
P/N 81-CO2MAN-001 6-3 September 2013
7. Inspect CO
2
system discharge heads for cracks, corrosion, grime, etc. Ensure that
discharge heads are tightly secured to each CO
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cylinder valve and connected to the
discharge manifold with a flexible discharge hose or swivel adapter.
8. Inspect flexible discharge hoses for loose fittings, damaged threads, cracks, rust, kinks,
distortion, dirt, and frayed wire braid. Tighten loose fittings, and replace hoses which have
stripped threads. If necessary, clean as directed in Paragraph 6-6.3.
9. Inspect discharge manifold for physical damage, corrosion, and dirt. Inspect manifold
support brackets and clamps for looseness and damage. Inspect check and stop valves,
where applicable, for deformation, leakage, cracks, wear, corrosion, and dirt. Secure loose
parts. Replace damaged parts. If necessary, clean as directed in Paragraph 6-6.3.
10. Inspect discharge nozzles for dirt and physical damage. Replace damaged nozzles. If
nozzles are dirty or clogged, refer to Paragraph 6-6.4. Where frangible discs are used,
ensure they are intact and clean. Look for holes or cuts. Broken discs will allow vapors, oils,
etc. from the hazard to enter into the nozzles and system piping and seriously effect or
block system discharge.
11. Inspect pressure switches for deformations, cracks, dirt or other damage. Replace switch
if damage is found.
12. Check nitrogen cylinder pressure gauge for proper operating pressure. If pressure loss
(adjusted for temperature) exceeds 10%, recharge with nitrogen to 1800 PSIG at 70°F.
See Figure 6-1 for pressure-temperature relationship.
13. Inspect lock-out valve (if installed). Valve must be secured and locked in the “open”
position.
14. Visually inspect Control Panel/Detection system. Ensure that system is “normal” and free
from any “alarm” or “trouble” signals.
15. If any defects are found during the monthly inspection, immediately contact a Kidde Fire
Systems Distributor to service the systems.
CAUTION
Do not paint nozzle orifices. The part number of each nozzle is stamped on the
nozzle. Nozzles must be replaced by nozzles of the same part number. Nozzles
must never be interchanged, since random interchanging of nozzles will
adversely affect proper CO
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distribution within a hazard area.