Maintenance
06-237619-001 6-11 April 2020
6-7 ANNUAL INSPECTION PROCEDURE
In addition to performing the semi-annual inspection which includes monthly and weekly
inspection tasks, perform the following procedures annually:
6-7.1 Check Kidde IGS System Cylinder Pressure Gauges
Per NFPA 2001, Section 7.1.3.2, where container pressure gauges are used for fire suppression
systems, the gauges shall be compared to a separate calibrated device annually. Check the
Kidde IGS System agent cylinder pressure gauges against a separate calibrated pressure
gauge to ensure the Kidde IGS gauges are accurate. If the Kidde IGS gauges are not accurate,
replace the release unit or slave gauge assembly. This applies to agent cylinder gauges only.
6-8 INSPECTION PROCEDURES-2 YEAR
In addition to performing the semi-annual inspection, perform the following procedures every
2 years:
6-8.1 Distribution Piping Blow Out
Before blowing out the system, remove pipe caps from the ends of the distribution piping to
allow any foreign matter to blow clear. In addition, remove any Manifold Safety Devices. Blow
out all distribution piping with dry air or CO
2
to make sure there are no obstructions.
1. Remove all release units from the agent cylinders. Disconnect all control heads from pilot
cylinders.
2. Remove all pipe caps on dirt traps from distribution piping to allow any foreign matter to
blow clear.
3. Remove all Manifold Safety Devices.
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 Manifold Safety Devices as required.
6. Reconnect all release units to agent cylinder valves.
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 release units from flexible hose(s). Discharge of the system
will cause flexible hose, without release units attached, to flail violently,
resulting in possible equipment damage and severe bodily injury to personnel.
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