Fire Pump Pressure Switch

The fire pump system when started by pressure drop should be arranged as follows.

Fire pump pressure switch.

The turn on for the main fire pump is a water pressure switch. 2 the jockey pump start point should be at least 10 psi 0 68 bar less than the jockey pump stop point. 1 the jockey pump stop point should equal the pump churn pressure plus the minimum static supply pressure. Although not all jockey pump controllers furnished by these manufacturers use this switch verify the acceptability of this switch as a replacement for other styles.

Fire sprinkler pressure switches on the other hand watch for changes in pressure. 2 the jockey pump start point should be at least 10 psi 0 68 bar less than the jockey pump stop point. Alarm pressure switches which monitor changes in water pressure only. Replacement jockey pump controller pressure switch the alco controls series ps 1 pressure switch was furnished as standard in various manufacturer s jockey pump controllers including eaton cutler hammer firetrol and joslyn clark.

Main fire pump pressure switch the purpose main fire pump pressure switch of the main fire pump is to push quantities of fire suppressing water up to the upper floors of a building. 3 the fire pump start point should be 5 psi 0 34 bar less than the jockey pump start point. 1 the jockey pump stop point should equal the pump churn pressure plus the minimum static supply pressure. When there s a fire sprinkler heads are going to activate and spray water.