Kidde Fire Protection 400 Series, Design, Installation, Operation, And Maintenance Manual

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Maintenance
July 2018 6-4 06-237518-001
6-6 EVERY 6 MONTHS
Perform the following procedures every 6 months:
6-6.1 Test System Selector Valve (If Fitted)
The valve to be pneumatically operated as follows:
1. Disconnect hose from manifold.
2. Connect compressor or nitrogen test cylinder to hose.
3. Remove pin and open solenoid on backplate manifold.
4. Apply pressure and confirm operation of valve.
5. Repeat test for each valve.
Note: Confirm remote indication if applicable.
6-6.2 Examine Agent Containers
Externally examine containers for signs of damage or corrosion.
6-6.3 Inspect Distribution Pipe Work and Nozzles
All pipe work and nozzles should be visually inspected for any signs of damage, deterioration
or obstruction. Nozzles should be checked for any signs of blockage and cleaned out if
appropriate. Any paint or lacquer shall be removed.
6-6.4 Inspect Protected Room
Inspect the protected room thoroughly to determine if any changes to the volume, new
penetrations, leakage rate etc. have occurred which could adversely affect extinguishing
performance of the system and/or require additional pressure relief openings to be installed.
Operation of pressure relief opening devices together with unobstructed flow to free air shall
be verified.
Where the integrity inspection reveals changes to the enclosure for which the system originally
was designed that could result in failure to maintain the extinguishing concentration, they shall
be corrected or the system redesigned to provide the original degree of protection.
Should additional equipment have been introduced resulting in a higher required
concentration, pressure relief openings may have to be increased.
6-6.5 Test Discharge Pressure Switches
Pressure switches must be tested semi-annually for proper operation.
1. Contact the appropriate personnel and obtain authorization for a shut-down.
2. Ensure that the hazard area operations controlled by the pressure switch are operative.
3. Manually operate the switch by pulling up on the plunger and verify that the hazard area
operations controlled by the pressure switch shut down.
4. Return the pressure switch to the SET position.
5. Reactivate all systems that were shut down by the pressure switch (such as power, venti-
lation systems and compressors).