2-2.3 Post-Fire Operation; 2-2.4 Cylinder Recharge; 2-2.5 Special System Precautions; 2-2.5.1 Systems Actuated With A Master Hfc-227Ea Cylinder - Kidde Fire Systems ECS Manual

Operation
2-2.3 Post-Fire Operation
After an HFC-227ea discharge, qualified fire suppression system maintenance personnel must
perform post-fire maintenance as directed in Chapter 6 of this manual. Observe all warnings,
especially those pertaining to the length of elapsed time before entering the hazard area.
Do not enter a hazard area with an open flame or lighted smoking materials.
Flammable vapors may cause re-ignition or explosion.
Ensure the fire is completely extinguished before ventilating the area. Before
WARNING
permitting anyone to enter the hazard area, ventilate the area thoroughly or
use self-contained breathing apparatus.
2-2.4 Cylinder Recharge
Recharge all HFC-227ea and nitrogen pilot cylinders immediately after use. Return all cylinders
to a Kidde Distributor or other qualified refill agency. Refill in accordance with the procedures
outlined in Chapter 6 of this manual.
2-2.5 Special System Precautions
2-2.5.1 Systems Actuated with a Master HFC-227ea Cylinder
In systems where a master HFC-227ea cylinder actuates a pressure operated control head on
a slave cylinder, the pressure in the flexible actuation hose line is vented into the discharge
manifold following the system discharge. The pressure drop in the pilot line allows the pressure
operated control head to automatically reset. However, as a precaution before reinstating the
system, ensure that the control head actuating pin is in the retracted (SET) position.
2-2.5.2 Systems Actuated with a Pilot Nitrogen Cylinder
In systems where a pilot nitrogen cylinder actuates a pressure operated control head on a slave
HFC-227ea cylinder, nitrogen pressure is trapped in the pilot manifold when the system
actuates and is not self-venting. Therefore, before reattaching a pressure operated control
head to a recharged HFC-227ea cylinder, the following procedure must be performed to ensure
that the pilot manifold is vented and the pressure operated control heads have returned to the
SET position.
1. Vent any remaining pressure from the pilot line and remove the master control head from
the nitrogen pilot cylinder(s). Reset the master control head and remove the pressure op-
erated control head(s) from the slave cylinder(s).
2. Recharge and reinstall the nitrogen pilot cylinders to the correct charged pressure and re-
install the master control head.
3. Before installing a pressure operated control head on an HFC-227ea cylinder, ensure that
the actuator pin is in the retracted (SET) position.
4. Follow all other procedures and cautions as detailed in Chapter 6 of this manual.
October 2014 2-2 06-236115-001