800027-A 38 06/05/2023
7 SYSTEM DISSASSEMBLY, ASSEMBLY, AND CHARGING
DO NOT assume that ILP cylinders have been completely discharged or are empty after a suspected or verified discharge
event. Any remaining pressure in the system could be still considered extremely hazardous and if not handled properly
can cause property damage, bodily injury, or death. Never handle the systems by the pressure switches, electric
solenoids, or pressure gauges. Always wear safety glasses and make sure the discharge port safety plug(s), cap(s), or
anti-recoil device(s) are properly in place before system installation, servicing, or other general handling.
Any maintenance requiring depressurization, filling, or pressurization should only be performed at an Authorized Firetrace
Service Location. Service at any other location will void the FM Approval and UL/ULC Listing. Please contact Firetrace
directly for a list of Authorized Firetrace Service Locations.
7.1 Depressurizing the Unit
1. Turn the ball valve lever to the “off” position (perpendicular to the valve).
2. Depressurize the detection/actuation tubing by depressing the Schrader valve inside of the End of Line Adapter.
3. Remove the detection/actuation tubing from the top of the ball valve.
4. Remove the discharge piping from the discharge ports.
5. Install discharge plugs into both discharge ports.
6. Slowly, slightly open the cylinder valve mounted ball valve, so only a small amount of nitrogen can be heard leaving the unit.
7. Ensure the unit is depressurized by verifying the pressure gauge reads 0 psig.
8. SLOWLY open the ball valve completely
Opening the ball valve too far, or too fast, will unseat the piston and bring FK-5-1-12 into the valve assembly.
9. Once the pressure gauge has reached 0 psig, slowly open the ball valve completely
10. Carefully remove the discharge plugs from the valve to ensure system depressurization.
7.2 System Recharge
Use the following steps to recharge an empty Firetrace Pre-Engineered Automatic Indirect Low Pressure (ILP) Clean Agent Extinguisher System
with FK-5-1-12 Clean Agent:
1. Fill via the discharge port or ball valve if using a pump, alternatively remove cylinder valve and siphon tube to fill directly into empty cylinder
(if cylinder valve is removed, ensure the cylinder threads are clean and free of debris)
2. Weigh and record the empty weight of the cylinder (and valve assembly if using a pump).
3. Fill system to the correct agent fill level per the system size
4. Once filled, either remove fill lines from cylinder valve (if using a pump) or install cylinder valve and siphon tube if agent was poured into
cylinder (ensuring the cylinder valve is torqued to 60 ft-lbs to the cylinder, and that the cylinder valve O-ring is lubricated and in good
condition)
5. Connect the dry nitrogen fill line to the fill adapter. Ensure it is regulated to 195 psig at 70 °F [13.5 bar at 21 °C] (pressure may have to be
adjusted for temperatures higher or lower than 70°F).
Pressurized (charged) cylinders are extremely hazardous and if not handled properly are capable of causing bodily injury,
property damage, or death. Always wear safety glasses and make sure the discharge plugs are properly in place before
unit installation, servicing, or other general handling.
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