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Fire Pump Controller (VFD)

Fire Pump Controller (VFD)

Fire Pump Controller (VFD)

(OP)
I'm referring to my old thread184-20314 related to the above mentioned subject.

Actually the use of Variable speed fire pump controllers has been approved by NFPA 20 – 2003. you may refer to the following clause.

10.5.5   Variable Speed Pressure Limiting Control. Variable speed fire pump controllers shall be permitted provided that the following apply:    
                                                
(1)     Upon failure of the variable speed pressure limiting control, the pump operates at rated speed.
(2)     The variable speed pressure limiting control is listed for fire service.  

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