Maintenance
April 2020 6-8 06-237619-001
7. Ensure the release unit operated by seeing if the pin on the anti-recoil cap popped up. If
the release unit did not operate, check the circuit for electric continuity to the release unit
and repeat the test. If necessary, replace the damaged release unit. Repeat the test if the
release unit was replaced.
8. Return the unit to service by first ensuring the release unit is de-energized. Next, dis-
connect the actuation hose from the release unit to the valve at the release inlet.
9. Remove the anti-recoil cap and reinstall the discharge hose to the discharge outlet.
Remove the spare Pilot Line Bleed Valve from the release outlet.
10. Reconnect all actuation hoses. Make sure to push the actuation hose in fully.
6-6.7 Control Head Test for Nitrogen Pilot Cylinders
All control heads used on Nitrogen Pilot Cylinders must be tested on a semi-annual basis.
Note: Not all systems use a Nitrogen Pilot Cylinder.
6-6.7.1 Electric Control Head Test for Nitrogen Pilot Cylinders
Electric control heads must be tested semi-annually for proper operation. This test can be
performed without discharging the Kidde IGS System nitrogen pilot cylinders. Test one hazard
area at a time before proceeding to the next, as follows:
1. Remove all electric control heads and control head monitors from all Kidde IGS nitro-
gen pilot cylinders serving the hazard area being tested. Let the electric control heads
hang freely from the flexible electric conduit connections.
2. Check the control panel to see that the Control Head Monitor reports a supervision alarm
to the panel.
3. Operate the Kidde IGS System electrically. This can be accomplished by actuation of the
Kidde IGS System at the system control panel or by manual operation of an electric pull
station.
4. Ensure all electric control heads have operated, that is, the indicator on the electric control
head has moved to the RELEASED position. If any control heads have not operated, check
the circuit for electric continuity to these particular heads and repeat the test. Replace all
damaged heads. Repeat the test if any control heads have been replaced.
5. Observe the instructions on the caution label attached to each electric control head. Re-
place any damaged heads which fail to reset properly before reconnecting to pilot cylinders.
Re-Install the Control Head Monitor between the control head and corresponding valve. Re-
attach all electric control heads to the threaded port on the pilot cylinder valve. Tighten the
swivel nut securely. Make certain each electric control head is in SET position before recon-
necting to cylinders. Failure to follow this procedure will result in accidental Kidde IGS Sys-
tem discharge.
CAUTION
All control heads must be removed from the Kidde IGS nitrogen pilot cylinders
prior to testing to prevent accidental cylinder discharge.
CAUTION
Electric control heads must be reset manually before reconnecting to the pilot
cylinder valves.
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