Title: AV-1 alarm valve.pdf
NOTICE For variable pressure systems, a clogged alarm line drain will increase the likelihood of a false alarm.First break the union downstream of the Drain Restriction and remove the Drain Restriction for cleaning by back- flushing the screen. Re-install the Drain Restriction and re-assemble the drain line.Loss of Excess System Pressure For variable pressure systems, the System Pressure Gauge normally indi- cates a pressure greater than that shown by the Supply Pressure Gauge. Also, the value should be close to that of the peak supply pressure that has occurred after the system was placed in service.NOTICE For variable pressure systems, loss of excess system pressure will increase the likelihood of a false alarm.Follow the procedure indicated below to correct a loss of excess system pressure condition.