Title: AV-1 alarm valve.pdf
The vent connection can be used to bleed-off excessive air from the sys- tem, and therefore, minimize the possibility of a false alarm due to a transient surge in supply pressure. The contraction/expansion associated with an excessive amount of trapped air could also cause the Waterway Clap- per to cycle open and shut during an inspector’s test or during a discharge by a single sprinkler.Setting Procedure Steps 1 through 11 are to be performed when initially setting the Model AV-1- 300 Alarm Check Valve or after system operation due to a fire.NOTICE Filling the system with water will result in operation of the associated alarms. Consequently, notification must first be given to the owner and fire department, central station, or other signal station to which the alarms are connected.Notify the proper authorities and all personnel who may be affected that an alarm test is to be performed.