Fire Pump Pressure Switch Setting

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Fire pump pressure switch setting.

Fire pump stop 115 psi 50 psi 165 psi vi. To assure that the fire pump runs when it is supposed to and the jockey pump won t interfere with fire protection the fire pump sensing system should be set up in this arrangement. Jockey pump stop 115 psi 50 psi 165 psi iv. Start the fire pump and note the maximum pressure on the discharge gauge.

60 psi from city maximum static iii. The fire pump system when started by pressure drop should be arranged as follows. 2 the jockey pump start point should be at least 10 psi 0 68 bar less than the jockey pump stop point. Jockey pump start 165 psi 10 psi 155 psi v.

50 psi from city minimum static. Fire fighter vinod choudhary 33 372 views 29 33. Pressure settings for fire pump controllers. Nfpa 20 s pressure switch settings for fire and jockey pump settings are required to be relatively close to help eliminate water hammer on start up.

Examples of fire pump settings. 1 the jockey pump stop point should equal the pump churn pressure plus the minimum static supply pressure. 1000 gpm 100 psi pump with churn pressure of 115 psi ii. The pressure operated switch in the controller should be sensitive enough to permit this range to be as short as 10 to 13 psi.

A sudden massive amount of water. Depending on the type of pressure switch the fire pump would come on at 130 135 psi. Let s say the pressure is 150 psi.