Title: AV-1 alarm valve.pdf
Step 9. Check for and remove any debris that may have become lodged in the Clapper Facing. If a minor imper- fection remains in the Clapper Facing, then turn it over after thoroughly clean- ing both surfaces with a clean cloth. Replace the Clapper Facing if neces- sary. Be sure to securely re-tighten the retaining fastener for the Clapper Washer.Step 10. Replace the Spring and Waterway Clapper Assembly as shown in Figure 1. While holding the coils of the Spring down, re-insert the Hinge Pin. Be sure that the Hinge Pin is pushed all the way to the rear of the valve.Step 11. Replace the Handhole Cover. Return the Alarm Valve to operation in accordance with the steps described in the Setting Procedure section.Clogged Alarm Line Drain If water either does not flow or only dribbles out of the alarm line drain dur- ing an alarm test, then it is likely that the screen protecting the Restriction Assembly drain orifice (Ref. Figure 3) has become clogged.