Kidde Fire Systems ECS Manual page 183

5. Install the electric control head to the top port of the stackable pressure operated control
head and tighten securely.
Ensure that the pilot line is not pressurized and the actuating pins are in the SET
position (that is, the actuating pins are in the fully retracted or SET position).
Failure to follow this procedure will result in accidental discharge and possible
WARNING
death, personal injury, and property damage when the control head is installed
on the valve.
Note: When installed, the Control Head Monitor does not sit completely snug against the
valve. This play allows for easier attachment of conduit to the component.
The placement supervision signal is not a substitute for ensuring proper
interlock of the actuator plunger to the valve core assembly. Make sure the
WARNING
control head is properly seated.
July 2016 10 06-236115-003