Victaulic FireLock 751 Series Installation, Maintenance, & Testing Manual

Series 751 FireLock
®
European Alarm Check Valve Stations
16
TROUBLESHOOTING – SERIES 751 ALARM CHECK VALVE
Problem Possible Cause Solution
The system water pressure gauge is fluctuating with the supply
pressure.
The check valve in the bypass line is installed backward. Check the orientation of the bypass check valve. The arrow must point
from the supply side to the system side.
Debris is present in the bypass check valve. Remove the threaded cap to the check valve, and remove any debris.
Make sure the clapper is free to move.
Water is leaking from the intermediate chamber. Water is getting past the seal. Check the clapper seal and seat for physical damage. Make sure no
debris is present.
The water motor gong is not ringing, or the ringing is weak. No water is going into the intermediate chamber. Make sure the holes in the seat ring are not plugged.
Water from the alarm line could be leaking out of the alarm line drain of
another valve.
Make sure there are check valves isolating the alarm line of each valve.
The wrong restrictor size is installed in the alarm line drain. Confirm that the proper restrictor size is on the alarm drain. If not, re-
install the proper size restrictor, according to the trim drawing.

Victaulic FireLock 751 Series Specifications

General

Brand	Victaulic
Model	FireLock 751 Series
Category	Control Unit
Language	English