Pool Main Pump Motor: Difference between revisions
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→Variable Frequency Drive
Matt Parnell (talk | contribs) |
Matt Parnell (talk | contribs) |
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=== Justification === | === Justification === | ||
As of Fall 2021, the pump is controlled by a Square D 8536 latching motor starter (relay). The pump is manually operated via start and stop pushbuttons. The flow rate is adjusted via the butterfly valve on the output side of the pump. | As of Fall 2021, the pump is controlled by a Square D 8536 latching motor starter (relay). The pump is manually operated via start and stop pushbuttons. The flow rate is adjusted via the butterfly valve on the output side of the pump. Removal of the motor starter and replacement with a Variable Frequency Drive (VFD) has been proposed. This system would ideally be implemented prior to the 2022 swim season. | ||
Removal of the motor starter and replacement with a VFD has been proposed. This system would be implemented prior to the 2022 swim season. | |||
Benefits to changing to the VFD include: | Benefits to changing to the VFD include: | ||
* | * Main pump motor speed can be automatically adjusted (via the [[Pool Systems Automation|automation system]]) to compensate for changes in flow rate due to the state of the strainer basket and [[Pool Filter Tanks|sand filters]]. A constant and flow rate can be assured until the strainer basket or filters become too clogged. The automation system is NOT required to operate the drive. In the event that the automation system is not operational (or remote VFD control is disabled), the VFD can be operated with start and stop pushbuttons in a manner very similar to that of the motor starter. | ||
* No need for the operator (managers or B&G personnel) to regularly adjust the flow rate due to changing conditions. An improper flow rate: | * No need for the operator (managers or B&G personnel) to regularly adjust the flow rate due to changing conditions. An improper flow rate: | ||
** Violates best practices and/or health department requirements if too low (minimum number of complete water turn-over cycles per 24 hour period). | ** Violates best practices and/or health department requirements if too low (minimum number of complete water turn-over cycles per 24 hour period). | ||