The document discusses various interactive parameters and interdependencies related to fire pump controllers. It covers topics like transient energy handling, control circuitry reliability, data recording considerations, enclosure types, single phase protection, environmental conditions, pressure coordination, and redundant pump interlocking. Redundant pump operation is addressed, noting the conditions under which the secondary pump would start and lockout the primary.

1. Interactive Parameters - for - F.M. Approvals - by - James S. Nasby Columbia Engineering

6. Model ECHA in NEMA 4XC Enclosure

9. Model ECHA with Cabinet Strip Heater Humidistat Note: 150 Watt 230 Vac Heaters @ 115 Vac = 37.5 Watts = Safer Lower Surface Temperature Operation

10. Model ECV 250Hp: Driphood Cooler Exterior Fan Inlet Air Filter VFD NEMA 12 Back Box

11. Pressure Setting Coordination: Combined System Booster Pumps

12. Pressure Setting Coordination: Fixed or Variable Speed Jockey

13. Supply Pressure Variation

15. Model DCRWBA with 20 Amp Chargers for 400 A-H Batteries NEMA 4 Version is in a Two Door Enclosure

19. Model ECV with: Model SRAP Alarm Set (for Additional Tamper Alarm Inputs) Weekly Test Low Suction Pressure Alarm

20. Close Up

21. Questions ??