Maintenance
06-237619-001 6-1 April 2020
CHAPTER 6
MAINTENANCE
6-1 INTRODUCTION
This chapter contains maintenance instructions for the Kidde Fire Systems Inert Gas
Engineered Fire Suppression System (Kidde
®
IGS) Series using IG-100 or IG-55 (herein refer
to collectively as the “Agent”). These procedures must be performed in accordance with
regulations.
Be aware of the following:
• Kidde Inert Gas Systems must be serviced by qualified personnel only.
• Any environmental or operating condition which causes shorting or grounding of system
components can cause system malfunctions or actual discharge.
• Before commencing service isolate the system by removing control heads and isolating
electronically at the panel.
6-1.1 Agent Storage Cylinders
Agent storage cylinders are pressurized vessels containing the agent pressurized to 300
bar gauge at 15°C (4351 psig at 59°F) or 200 bar gauge at 15°C (2901 psig at 59°F).
This pressure causes considerable thrust if the discharge valve is actuated, thus, the
safety transport cap supplied with the cylinder must be installed when handling or storing
the cylinder, or whenever it is not securely fastened down. The safety transport cap
prevents objects from striking the burst disc valve, and reduces and redirects the thrust
if the cylinder is accidentally discharged.
Handle the cylinder carefully to prevent damaging the gauge and other attached fixtures. The
cylinder must not be subjected to temperatures above 130°F (54°C) nor be exposed to direct
sunlight, or the pressure relief device may operate, releasing the agent.
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