Lets Say Soleniod 1 is plug "D" and Solenoid 2 is plug "E"
and Level sensor 1 is the lower and Level Sensor 2 is the higher
Program this way:
Level S1 set plug D on at Lvl2 (Low water)
Level S1 set plug E on at Lvl2 (Low water)
Level S1 Set plug D Off at Lvl1 (Right Water Level)
Level S1 Set Plug E Off at Lvl1 (Right Water Level)
Level S2 Set plug E off at Lvl1 (High Water)
Level S2 set plug D off at Lvl1 (High Water)
This method is a little more complicated by offering redundant turn offs but it gives more security in cases where a level sensor may be stuck or a solenoid burned out or even a combination problem where one solenoid is dead and one level sensor is stuck.
Eg if Solenoid 1 is dead and Level sensor 2 is stuck, the water will still stop because of this Line:
Level S1 set plug E off at Lvl1
Oh BTW dont think this kind of thing is rare! When you setup redundant systems most people dont service them for long periods, your Solenoid #1 may burned out and be stuck ON for months and you would not know, then your Sensor gets jammed at a later date and you still might not know. With this setup you would need 3 out of the 4 hardware units to fail or both solenoids, before flooding would occur.
<a href=showthread.php?s=&postid=7468565#post7468565 target=_blank>Originally posted</a> by saurus
I am going to post this in the aquarium obsessed forum but I just wanted two sets on instructions. I have setup my level one and level two float switches. I have my program feed running through two solenoids directly into my system for evaporation replenishment. The lower level float switch activates when the water gets too low and opens one of the solenoids to let water in. Both solenoids are normally closed so when the first float gets too low it needs to turn on the plug that solenoid #1 is plugged into and then close when it fills up. The second solenoid is a backup incase the first solenoid gets stuck open. The second float is higher and #2 solenoid always needs to be open/on unless it is activated if the water gets too high and then turns the plug off that the #2 solenoid is plugged into. So, if the water level gets too high I need the second higher float switch to turn off a plug. I am having trouble trying to program this. The examples in the instructions are a little vague. I would appreciate detailed directions on how to program this. Thanks in advance and I hope it is not too confusing.
Cheers,
Clint