Surge Tank - Revision history

Matt Parnell: /* Structural and Surface */

2022-01-17T12:18:59Z

Structural and Surface

← Older revision		Revision as of 12:18, 17 January 2022
Line 164:		Line 164:

	=== Structural and Surface ===		=== Structural and Surface ===

			Details to follow.

Matt Parnell: /* Piping */

2022-01-17T12:18:53Z

Piping

← Older revision		Revision as of 12:18, 17 January 2022
Line 160:		Line 160:

	=== Piping ===		=== Piping ===

			Details to follow.

	=== Structural and Surface ===		=== Structural and Surface ===

Matt Parnell: /* Future Overhaul */

2022-01-17T12:16:44Z

Future Overhaul

← Older revision		Revision as of 12:16, 17 January 2022
Line 62:		Line 62:

	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 ===

Matt Parnell: /* Other Piping and Valves */

2022-01-17T12:10:28Z

Other Piping and Valves

← Older revision		Revision as of 12:10, 17 January 2022
Line 151:		Line 151:
	This actuator has been purchased as of January 2022 and is awaiting installation.		This actuator has been purchased as of January 2022 and is awaiting installation.

	=== ~~Other~~ Piping ~~and Valves~~ ===		=== Piping ===

	=== Structural and Surface ===		=== Structural and Surface ===

Matt Parnell: /* Piping */

2022-01-17T12:10:04Z

Piping

← Older revision		Revision as of 12:10, 17 January 2022
Line 151:		Line 151:
	This actuator has been purchased as of January 2022 and is awaiting installation.		This actuator has been purchased as of January 2022 and is awaiting installation.

	=== Piping ===		=== Other Piping and Valves ===

	=== Structural and Surface ===		=== Structural and Surface ===

Matt Parnell at 12:09, 17 January 2022

2022-01-17T12:09:41Z

← Older revision		Revision as of 12:09, 17 January 2022
Line 150:		Line 150:

	This actuator has been purchased as of January 2022 and is awaiting installation.		This actuator has been purchased as of January 2022 and is awaiting installation.

			=== Piping ===

			=== Structural and Surface ===

Matt Parnell at 12:08, 17 January 2022

2022-01-17T12:08:21Z

← Older revision		Revision as of 12:08, 17 January 2022
Line 52:		Line 52:
	* 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.

	=== ~~Work-Arounds~~ ===		=== 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:

Matt Parnell: /* Future Overhaul */

2022-01-17T12:07:55Z

Future Overhaul

@@ Line 64: / Line 64: @@
 === Modulating Drain Valve ===
 ==== Motorized Actuator ====
@@ Line 109: / Line 111: @@
 * The motor has an internal thermal trip set at 135 &deg;C.
 * Terminals are sized for #22 AWG to #14 AWG.
 ==== Valve ====
@@ Line 143: / Line 149: @@
 |}
-* Bray Series 30 wafer butterfly
+This actuator has been purchased as of January 2022 and is awaiting installation.

Matt Parnell: /* Troubleshooting */

2022-01-17T12:01:25Z

Troubleshooting

← Older revision		Revision as of 12:01, 17 January 2022
Line 25:		Line 25:

	When a drain return modulating valve is not present, it is important that the drain return is restricted (the valve is partially closed). Otherwise, flow from the drain will potentially prevent adequate flow from the gutter return. In an ideal case, the surge tank should always have a modulating valve on the drain return.		When a drain return modulating valve is not present, it is important that the drain return is restricted (the valve is partially closed). Otherwise, flow from the drain will potentially prevent adequate flow from the gutter return. In an ideal case, the surge tank should always have a modulating valve on the drain return.

	~~==== Automatic Fill ====~~

	~~==== Manual Fill ====~~

	=== High Water Level ===		=== High Water Level ===

Matt Parnell: /* Known Deficiencies */

2022-01-17T11:52:33Z

Known Deficiencies

← Older revision		Revision as of 11:52, 17 January 2022
Line 49:		Line 49:
	** There was, at some point, a Fisher valve installed. A stainless steel float ball, with piping for hydraulic control, is still present in the tank. It is not known when this was removed and replaced with manual isolation valves.		** There was, at some point, a Fisher valve installed. A stainless steel float ball, with piping for hydraulic control, is still present in the tank. It is not known when this was removed and replaced with manual isolation valves.
	* The isolation valves between the pool and surge tank are failing or have failed. It appears that in [[Club History#2016]], the pool drain valve failed to the point that it could no longer be turned. In response to this, an additional butterfly valve was installed <i>inside</i> the surge tank to allow the pool to be shut down (all water from the pool must be isolated). This is very risky, as the drain isolation cannot be accessed from outside the surge tank. Watching a service person open or close this valve is an "interesting" event.		* The isolation valves between the pool and surge tank are failing or have failed. It appears that in [[Club History#2016]], the pool drain valve failed to the point that it could no longer be turned. In response to this, an additional butterfly valve was installed <i>inside</i> the surge tank to allow the pool to be shut down (all water from the pool must be isolated). This is very risky, as the drain isolation cannot be accessed from outside the surge tank. Watching a service person open or close this valve is an "interesting" event.
			* The surge tank drain-to-sump valve has nearly failed. During the pool closing in 2021, the service person had a very difficult time opening this valve. If it breaks, the pool cannot be opened.
	* The exit pipe is oddly routed, likely in response to a cheap fix when piping was replaced. The exit pipe should be straight, eliminating a multitude of 90's between the surge tank and the strainer basket.		* The exit pipe is oddly routed, likely in response to a cheap fix when piping was replaced. The exit pipe should be straight, eliminating a multitude of 90's between the surge tank and the strainer basket.
	* The tank leaks at several penetration points. Rudimentary fixes with hydraulic cement have been attempted, but many are failing.		* The tank leaks at several penetration points. Rudimentary fixes with hydraulic cement have been attempted, but many are failing.
Line 54:		Line 55:
	* The inside surface of the tank has deteriorated and must be stripped and coated for longevity.		* The inside surface of the tank has deteriorated and must be stripped and coated for longevity.
	* 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.

			=== Work-Arounds ===

			* 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:
			** If the pool water level is too low, insufficient gutter flow can lead to a critically low level in the surge tank. At this point, the automation system will shut down the main pump for safety. This is typically mitigated by engaging the auto-fill (which also feeds into the surge tank).
			** When the pool is very active, there is no way to reduce drain return flow to increase gutter return flow. Hence, the gutters are prone to overflow during busy periods.
			* Some additional patching has been applied to seal leaks, but it has shown to be ineffective. As of 2021, small but persistent leaks were observed.

	== Future Overhaul ==		== Future Overhaul ==