Riddle me this...Heater Program Question

[staplesofficewr]

Here is my Heater Program on my APEX lite.

Fallback OFF
Set OFF
If Temp < RT+2.6 Then ON
Defer 002:00 Then ON
If Temp > RT+3.0 Then OFF
Defer 002:00 Then OFF
If Outlet Return_Pump = OFF Then OFF


This is my question: In this program, RT=76 degrees, so I want the heater to come on 2 minutes after temp < 78.6 (which would be 78.5), the heater comes on as required, but shuts off WAY before 79.0...about 2 minutes after the temp = 78.6. What good is the "If Temp > RT+230 then off" statement? How can I get my heater to come on at the lower limit and stay on till the upper limit?

Thanks all.

 

[swearint]

Remove the Set OFF, it is interupting the control band.

Also, just as an FYI, the Defer and Min Time commands are always evaluated last regardless of position. They apply to the entire outlet rather than the preceeding command. So, when your Return_Pump shuts OFF, the Heater won't shut OFF until two minutes later (if already ON).

Todd

 

[staplesofficewr]

Ahhh yes.. Thanks Todd. I just changed it, Ill let it go a few cycles and see how it does. I also removed the defer off to keep it from getting too hot in the sump.