Title: AV-1 alarm valve.pdf
As necessary, install a pressure relief valve, in accordance with the requirements of the authority having jurisdiction, to automatically relieve the excess pressure that could other- wise be created in wet-pipe systems exposed to significant increases in ambient temperature.False Alarms Follow the step below when repeated false alarms occur in a variable pres- sure system.Step 1. Check for and correct the cause of continued leakage out the alarm line drain.Step 2. Check for and clean a clogged alarm line drain.Step 3. Check for and correct the cause of a loss in excess system pressure.Step 4. Drain the sprinkler system and re-fill it using the steps described in the Setting Procedure section.Intermittent Alarms If the pressure alarm switch gives a steady signal, but the water motor gen- erates an intermittent alarm, check for binding in the water motor alarm drive shaft.