Fire Pump Controller Technical Requirements (Petrochemical Plants)

This article is about Fire pump controller panel, technical requirement with automatic operation and how to perform remote monitoring.

Fire Pump Controller Technical Requirements

1. Individual pump controllers shall be provided for each pump service. Controllers shall be provided by an equipment manufacturer that has listed models for fire water service. The customer shall provide a single power supply to the skid. Power transformers and other hardware required to satisfy the various equipment needs shall be in the skid vendor’s scope.
2. Controller enclosures shall be free standing and rated for IP56 or NEMA 4X unless otherwise specified. Controllers shall be configured for across the line motor start (when applicable).
3. Each enclosure shall be provided with a space heater and a local thermostat.
4. Each controller shall be provided with a pressure switch that automatically turns on the pump after fire water pressure drops below controller set pressure. Pressure switches setpoints for all pumps shall be staggered so that pump operation is strictly defined on system pressure. The preferred sequence of pump operation is the jockey pump will continuously cycle on and off to maintain system pressure. On failing system pressure (10% pressure drop from jockey pump cut in pressure) the electric driven firewater pump will cut in (start) in order to maintain system pressure. On continuing falling pressure (10% pressure drop from the electric driven pump cut in pressure) the diesel engine fire water pump will start to maintain system pressure. The electric and diesel engine driven pumps cutout pressures shall be set 10% higher than the jockey water pump cut in pressure. The jockey water pump cutout pressure shall be set 10% higher than the electric and diesel engine driven pumps cutout pressures.
5. The main and standby fire water pump controllers shall be microprocessor based. The microprocessor shall store all events relating to the operation of the controllers in order to diagnose any potential problems. Events shall be time and date stamped. The microprocessor shall display critical pump and driver information to a local LED that is visible through the controller’s door/cover.
6. A printer shall be provided within the controller housing. The printer shall have warning lights to indicate printer is out of paper.
7. Each controller shall be provided with extra contacts for remote monitoring of pump operation. As a minimum, two contacts (one for pump running and one for pump fault) shall be provided with each controller.
8. The diesel engine Fire Pump Controller with Technical Requirements shall be provided with the following dry contacts for customers’ remote monitoring: Following inputs need for remote operation of fire water pump skid controlling system.

• • Engine running.
  • Engine failure to start.
  • Engine trip.
  • Low oil pressure trip.
  • High cooling water temperature trip.
  • Overspeed trip.
  • Charging system # 1 malfunction.
  • Charging system # 2 malfunction.
  • Engine controller not in AUTO.
  • Loss of engine run feedback.
  • Engine building sprinkler system initiation.

9. The diesel engine pump controller shall be located inside the fire rated building. The controllers for the jockey and motor driven fire water pumps shall be located a minimum of 1.5 m (5 ft) away from the building.

Fire Water Pump Skids used in Process Gas Facilities

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