Hello Todd, Is the jockey running during this test?
If not, There is not enough flow to keep the flow switch activated longer than the delay duration this will happen. If so and the jockey does not supply enough GPM (4-10) to keep the flow switch activated for the duration of the delay this will happen. Maybe use a Pressure switch for the flow alarm..... Or to signal Pump Failure. Monday, November 2, 2009, 11:06:39 AM, you wrote: > A situation came up this morning that I probably should know the > answer to, but I don't. A building is protected by a 500 gpm at 40 > psi diesel pump taking suction from a tank (no public water). The > pump feeds to 2 sprinkler risers with riser checks and flow switches. > The jockey pump pressure is set to approximately 50 psi. If the > inspector's test opens and the pump does not turn on, there is not > enough flow in the system to activate the flow switch. Consequently, > if a sprinkler goes off and the pump does not activate, then no alarm > is sent. Having never run into this or heard of it being tested, I > don't know if this is normal but it seems like it shouldn't be. Is > this normal? Is it ever tested? > My first reaction is what is the delay on the flow switch set to (30 > seconds). I told them to set to delay to 0 and see what happens. It > may be just a situation of getting the setting right. Thoughts? > Todd G. Williams, PE > Fire Protection Design/Consulting > Stonington, Connecticut > www.fpdc.com > 860.535.2080 > _______________________________________________ > Sprinklerforum mailing list > [email protected] > http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum > For Technical Assistance, send an email to: [email protected] > To Unsubscribe, send an email to:[email protected] > (Put the word unsubscribe in the subject field) -- Best regards, Charles Thurston mailto:[email protected] Coastal Fire Protection/ Myrtle Beach Fire & Safety Co. AFAA Guest _______________________________________________ Sprinklerforum mailing list [email protected] http://fireball.firesprinkler.org/mailman/listinfo/sprinklerforum For Technical Assistance, send an email to: [email protected] To Unsubscribe, send an email to:[email protected] (Put the word unsubscribe in the subject field)
