Have just converted to using 100% liquid Chlorine. Do not want to manually dose so after reading many posts here, have decided to use a stenner pump. Ordered a 220V 45MPHP10 and 15 gallon tank from USWatersystems.com. Went with 220V as I do not have a neutral line out to the pump area and would have difficulty getting one there.
I have an Ecostar VS pump that I schedule within the pump controller. It is fed from an Intermatic timer, however, I am just using the timer box as a means of ensuring all power to the pump is off when I do maintenance. (no cogs on the timer)
With the VS pump and a lack of a neutral to the pump area, believe my automation options are limited:
(1) A Hayward automation system would seem to work best due to its integration with the Ecostar VS pump, however, I've looked at a few of the manuals and they require a neutral line to develop 120, therefore, Hayward is not an option.
(2) A separate timer on the Stenner pump. Would rely on the timer and the pump clocks staying in sync which would normally not be an issue unless power drops for an extended period of time. I believe the Ecostar pump clock would be fine for some period of time (don't know how long a drop out it can tolerate). If I used a mechanical timer, it would lose sync. Not sure about the digital ones. But in any case, were we gone an extended period of time, it would be possible for the clocks to be out of snyc until we returned. (I know, probably a low likely hood event would could be handled by having a relative on call to rectify.)
(3) I ran across a thread which discussed using a LIRT220A current controlled relay and a SESTO delay time to: (a) only apply power when the pump was on and (b) control the on time of dosing. Seems like a perfect option for the fixed rate pump.
So my preference would be (3) given I can find parts and a suitable enclosure but might go with (2) to start with.
Is there a better option out there?