said by covid:Yes i have that, when relief pressure valve is open, it will ring after 60 seconds.
That's the proper way to do it, the 60 second delay is known as a retard, it's purpose is to prevent the flow from ringing the bell due to water surges.
If you opened the flow you will see a knob marked retard, it controls a diaphragm that holds back the lever that activates the switch, commonly it can be set from 0 to 120 seconds, the ones I install I set for 30 seconds, that's enough to prevent false trips and soon enough to get someone quickly alerted about the sprinklers going off.
Fire is a mean thing, I don't know if it is true but I have been told a fire will double in size every 60 seconds it's burning, so literally seconds count and that's where both properly installed smoke detectors and sprinklers can save lives.
And sprinklers while causing a lot of water damage, can suppress a fire early on reducing property damage compared to leaving the fire unchecked until the FD arrives.
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