Post-Discharge Maintenance
06-237619-001 7-3 April 2020
7-4 RE-INSTALLING SLAVE CYLINDER GAUGE ASSEMBLIES
Follow this procedure when re-installing the slave cylinder gauge assembly:
Note: Slave Cylinder Gauge Assemblies must be replaced as a whole unit. There are no indi-
vidual serviceable parts on the unit apart from the connector O-ring. When reinstalling
the slave cylinder gauge assembly, the O-ring must be replaced.
1. Remove the old O-ring in the connecting swivel and replace it with one of the O-rings in-
cluded in the rebuild kit, P/N: 38-400001-010. Make sure the O-ring is properly lubricated
before installation. If lubrication is missing, use silicone spray (Würth Art no: 0893221 or
similar).
2. Installing slave cylinder gauge assemblies, applying a torque of 45 ± 1Nm. A counter hold
may be required.
3. Leak test all connections on the slave cylinder gauge assembly by means of ammonium-
free leak detection liquid or spray, ensuring that there is no leakage.
Note: The pre-assembled unit shall not be tampered with, as any adjustment to components
pre-fitted to the connector block will lead to a leak.
7-5 RECHARGING KIDDE IGS SYSTEM CYLINDERS
After a fire, contact Kidde Fire Systems or authorized distributor for service replacements or
refilling of cylinders.
7-6 NITROGEN PILOT CYLINDER SERVICE AND MAINTENANCE
7-6.1 Nitrogen Pilot Cylinder Hydrostatic Pressure Test
A hydrostatic test must be performed in accordance with DOT Regulatory Compliance Guide, 49
CFR 180.209
.
Nitrogen Pilot cylinders shall not be recharged and shipped without hydrostatic test if more
than five years has elapsed from the date of the last test.
Nitrogen Pilot cylinders continuously in service without discharging can be retained in service
for a maximum of five years from the date of the last hydrostatic test. At the end of five years
the cylinder shall be visually inspected per CGA pamphlet C-6.
Cylinders must also be hydrostatic pressure tested immediately if the cylinder shows evidence
of distortion, cracking, corrosion or mechanical or fire damage.
CAUTION
Only the O-ring should be lubricated. Excessive lubricant in the valve port will
enter into the valve itself when pressurized and may jeopardize the
performance.
WARNING
Any area in which nitrogen is used or stored must be properly ventilated. A
person working in an area where air has become enriched with nitrogen can
become unconscious without sensing the lack of oxygen. Remove the victim to
fresh air. Administer artificial respiration if necessary and summon a physician.
Never dispose of liquefied nitrogen in an indoor work or storage area.
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