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.
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.
