Hale FoamLogix 6.5 - Manual (Page 128)

❑ Operation
128 FoamLogix 3.3 / 5.0 / 6.5 Installer / Operations Manual
p/n: 029-0021-68-0
5.7 PRIMING THE FOAM PUMP
When the Foam Tank Runs Dry
In some instances, the foam tank could run dry while operating the Hale
FoamLogix system. When the fire pump is running the foam pump may not
pump efficiently against 100 to 150 PSI (7 to 10 BAR) back pressure.
To re-establish foam concentrate flow quickly:
1. Turn the bypass valve to the BYPASS position.
2. With the fire pump flowing water from foam discharge and the Hale FoamLogix
ON, observe the hose from the bypass valve.
3. When foam concentrate flows from the hose turn the bypass valve back to the
INJECT position.
4. The pump is now primed and ready for normal operation.