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FIRE PUMPS SYSTEM INSTALLATIONS OVERVIEW AND HOW IT WORKS#fire #electrical #firecontrol
Engineers Guide
Overview
This video provides a comprehensive overview of fire pump systems, detailing their components and operational principles. It explains the roles of the jockey pump, electric fire pump, and diesel fire pump, highlighting their pressure settings, control mechanisms, and backup power sources. The presentation also covers essential auxiliary components like check valves, pressure gauges, alarm check valves, and the importance of system monitoring and maintenance. The video aims to educate viewers on the fundamental aspects of fire pump installations and their critical function in fire safety.
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Chapters
- Fire pump systems typically consist of three main pumps: the jockey pump, the electric pump, and the diesel pump.
- Each pump has specific pressure settings for activation and shutdown.
- The system is designed to automatically maintain water pressure for fire suppression.
Understanding the basic components and their roles is crucial for comprehending how the entire fire suppression system functions during an emergency.
The jockey pump is described as a booster pump that maintains system pressure, with specific cut-in and cut-out pressure settings mentioned.
- The jockey pump's primary function is to maintain system pressure and compensate for minor leaks.
- It operates within a specific pressure range, activating to raise pressure and deactivating once the set point is reached.
- The video mentions specific pressure settings for the jockey pump, such as a cut-in pressure of 290 psi and a cut-out pressure of 300 psi.
This pump ensures that the main fire pumps are not activated unnecessarily, saving energy and reducing wear on the larger pumps.
The speaker notes that the system pressure was 329 psi, which is above the jockey pump's cut-out setting, indicating it was functioning correctly.
- The electric fire pump is the main duty pump, designed to deliver a high volume of water (e.g., 1000 gpm).
- Its controller allows for manual operation, testing, and programming via USB.
- The pump is powered by an electric motor and connected to a main controller that monitors system status.
This pump provides the primary water flow needed to combat a fire, and its reliable operation is essential for effective firefighting.
The electric pump controller is shown, with settings for pressure (e.g., 275 psi) and modes for manual start, stop, and testing.
- The diesel pump serves as a standby, activating when there is a loss of electrical power.
- It is powered by a diesel engine and uses 12-volt batteries for starting and backup power.
- The diesel pump controller features various indicators for engine status, oil pressure, water temperature, and overspeed shutdown.
This pump ensures continuous operation of the fire suppression system even during power outages, a critical redundancy.
The controller panel for the diesel pump is shown with a tachometer, selector switch, oil gauge, battery gauges, and water temperature gauge.
- Key components include suction headers, discharge lines, check valves, OS&Y valves (outside screw and yoke), and pressure gauges.
- A sensing line between the check valve and the main OS&Y valve monitors system pressure for the pump controllers.
- The system includes connections for sprinkler lines (high and low zones) and alarm check valves that signal pump activation.
Proper installation and understanding of these components ensure the system operates as designed and provides accurate feedback.
The video points out the sensing line, explaining it transmits pressure information from the system to the electric controller.
- The diesel engine has components like a tachometer, oil gauge, battery gauges, and temperature sensors.
- It includes manual controls for starting and stopping, as well as safety features like overspeed shutdown.
- The engine requires air intake, fuel supply, and coolant for operation, with filters for oil and fuel.
Knowledge of the diesel engine's specific controls and maintenance points is vital for its reliable standby function.
The speaker demonstrates the selector switch for manual operation and points out the overspeed shutdown indicator light.
- Pressure relief valves (PRVs) are installed to prevent over-pressurization of the system.
- Valves, especially suction valves, are often supervised with tamper switches connected to the fire alarm system.
- Spare parts, such as sprinkler heads, should be kept on hand, and components like valve handles may be removed to prevent accidental closure.
These safety measures and maintenance practices are critical for ensuring the system's integrity and preventing failures during emergencies.
The removal of a valve handle is shown as a safety measure to prevent accidental shut-off of the pump's suction line.
Key takeaways
- Fire pump systems rely on a coordinated effort between jockey, electric, and diesel pumps to maintain pressure and deliver water.
- The jockey pump is essential for maintaining system pressure and preventing unnecessary activation of main pumps.
- The electric pump is the primary water source, while the diesel pump provides crucial backup during power failures.
- System components like check valves, pressure sensors, and OS&Y valves are critical for proper operation and monitoring.
- Safety features such as pressure relief valves and tamper switches are vital for system integrity and alarm notification.
- Regular maintenance and the availability of spare parts are necessary for the long-term reliability of fire pump systems.
Key terms
Jockey PumpElectric Fire PumpDiesel Fire PumpPressure SettingsCut-in PressureCut-out PressureControllerStandby PumpCheck ValveOS&Y ValveSensing LinePressure Relief Valve (PRV)Tamper SwitchAlarm Check Valve
Test your understanding
- What is the primary role of the jockey pump in a fire pump system?
- How does the diesel fire pump ensure continuous operation during a power outage?
- What is the function of the sensing line, and where is it typically located within the system?
- Why are tamper switches important for valves in a fire pump system, and how do they enhance safety?
- Describe the purpose of a pressure relief valve (PRV) in the context of a diesel fire pump system.