Surge Tank: Difference between revisions
Matt Parnell (talk | contribs) |
Matt Parnell (talk | contribs) |
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* There is no overflow pipe. It was capped-over at some point. This is a minor code issue. | * There is no overflow pipe. It was capped-over at some point. This is a minor code issue. | ||
=== | === Workarounds === | ||
* To address the lack of modulating valve, the drain return valve is set to be only partially opened. By doing so, only a portion of the pump demand is met by the drain return. The rest must be supplied by the gutter return. This works to an extent, but: | * To address the lack of modulating valve, the drain return valve is set to be only partially opened. By doing so, only a portion of the pump demand is met by the drain return. The rest must be supplied by the gutter return. This works to an extent, but: | ||
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To fully address the [[#Known Deficiencies|known deficiencies]], an overhaul of the surge tank is planned as the budget permits. | To fully address the [[#Known Deficiencies|known deficiencies]], an overhaul of the surge tank is planned as the budget permits. | ||
=== Isolation Valves === | |||
There are three isolation valves to be replaced. Details to follow. | |||
=== Maintenance Drain Valves === | |||
There are three maintenance drain valves - not to be confused with the pool drain return valve(s). Details to follow. | |||
=== Modulating Drain Valve === | === Modulating Drain Valve === | ||
The modulating valve utilizes a motorized actuator to turn a butterfly valve on the drain return. The term "modulating" implies that the valve can be fully open, fully closed, or operating at a point in-between. | |||
==== Motorized Actuator ==== | ==== Motorized Actuator ==== | ||
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* The motor has an internal thermal trip set at 135 °C. | * The motor has an internal thermal trip set at 135 °C. | ||
* Terminals are sized for #22 AWG to #14 AWG. | * Terminals are sized for #22 AWG to #14 AWG. | ||
This actuator has been purchased as of January 2022 and is awaiting installation. | |||
Previously, a Bray 70-24-0201SVH-BBU was recommended. However, 24V operation, the internal 4-20 mA controller, and the battery backup unit (BBU) all add unnecessary cost. | |||
==== Valve ==== | ==== Valve ==== | ||
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|} | |} | ||
This actuator has been purchased as of January 2022 and is awaiting installation. | |||
=== Piping === | |||
Details to follow. | |||
=== Structural and Surface === | |||
Details to follow. | |||