Problem with chiller on/off

[dcforester1]

I have had this set up for about 6mos, and just noticed my chiller is always on/off all day. I have it set up as follows;

Fallback OFF
Set On
If Temp < 79.5 Then OFF
If Temp > 80.0 Then ON
Defer 001:00 Then OFF
Defer 001:00 Then ON


I wanted it to come on at 80, and off at 79.5. What are others using for a range for the temp during the day, and how should I have it NOT to come on once it hits 79.6. I tried flipping the on/off, but it was doing the same thing.

TIA Derek

[RussM]

Remove the Set ON statement.... it's the cause of your problem

I'd increase the Defer timing by a few minutes too.

[dcforester1]

thanks Russ, is that 1min, or 1hour? I wasn't to sure about that. Should it be the same way for a heater, no ON statement?

Thanks again

[RussM]

Defer is in mm:ss

[RussM]

Yes, if you want an operating range of temp or ph or whatever, and you have If xxxx < yyyy and If xxxx < zzzz statements to turn an outlet on and off, do not use a set statement.

[RussM]

Opts. That should have been a < and a >.