Rex wrote:
I am trying to troubleshoot my aerobic septic system. I need to
control the time and the duration of the pump, which waters my lawn.

Well the two shouldn't be connected unless you are having a problem with
water overload.


It has a Chronos OL2R1 DPST timer relay, with 4 dials

It looks like this - poor photo, but the best i could find.

http://www.digikey.com/Web%20Export/...t_chronos2.jpg

Question what do the 4 dials do?
I think the smaller dials determine the delay between the time the
pump float switch goes on, until the relay energizes, to prevent
momentary cycling.
The larger blue dials are marked Ton and Toff, and graduated 1 - 10
Does that mean they come on every 4 hours if Ton is set to 4, or 10
hours if set to 10?
How then do I set Toff ?

Lastly, is there a clock-type timer that is a plug-in replacement to
this?
Ideally, I would like to set it to run at 5:00 AM every day.
I'd also like to be able to turn it off when it's rainy.

The dials are used to activate the internal functions of the timer.

They are used to program the unit by selecting a function the using the
Ton/Off dials to set those times.
Then You select the next function and repeat.

I am wondering if it is set up so that it only cycles the aerobic system
so there is no extra water.

I would contact the outfit that installed the system. Some of them are
VERY touchy in the way they operate and extra water can really screw
them up.


--
Steve W.