Separate heater program for certain days

[Raul-7]

I have my second heater off during the day to save energy; but after my AWC which finished at 1300 - I want to program a VO and apply it to override the time command on M and Th. Do I also have to apply the If Temp </> command to the VO? Will this work?

[Raul-7]

Heater_2
Fallback OFF
Set OFF
If Temp < 82.1 Then ON
If Temp > 82.3 Then OFF
If Time 9:59 to 18:59 Then OFF
If Outlet Heater_Safe = ON Then ON
If Outlet DrainPump = ON Then OFF
If Outlet AWC_Fill = ON Then OFF
Min Time 002:00 Then OFF


Heater_Safe
Fallback OFF
Set OFF
If Temp < 79.0 Then ON
If Temp > 82.0 Then OFF

Does the Heater_Safe override the If Temp commands on the physical outlet?

[iamchadster]

The apex will evaluate statements from top to bottom and execute the last true statement. There are a couple exceptions to this which are min time and the defer statement. Those are executed regardless of their position. In your case the the Heater_Safe is lower and it would override the if temp statements as you have written. If by chance you turn on Heater_Safe right at the time the outlet switches off there will be about a two minute delay because you have a min time statement in there to keep the outlet off. Not that it will matter much, but if you are watching your programming execute and don't see anything happening that's something to keep in mind.

BTW, virtual outlets do not need Fallback Statements, physical outputs/outlets will use fallback statements.

[Raul-7]

The apex will evaluate statements from top to bottom and execute the last true statement. There are a couple exceptions to this which are min time and the defer statement. Those are executed regardless of their position. In your case the the Heater_Safe is lower and it would override the if temp statements as you have written. If by chance you turn on Heater_Safe right at the time the outlet switches off there will be about a two minute delay because you have a min time statement in there to keep the outlet off. Not that it will matter much, but if you are watching your programming execute and don't see anything happening that's something to keep in mind.

BTW, virtual outlets do not need Fallback Statements, physical outputs/outlets will use fallback statements.

Thanks for the reminder.

I know it evaluates it top to bottom [with exception to Defer and Min Time which apply to the entire outlet] - but that never made perfect sense to me. Does it go in order and execute the last true statement? If more than one statement is true; it chooses the last one?

[RussM]

[QUOTE=Raul-7{If more than one statement is true; it chooses the last one?[/QUOTE]
Yes, the last true statement

[Raul-7]

Yes, the last true statement

Heater_2
Fallback OFF
Set OFF
If Temp < 82.1 Then ON
If Temp > 82.3 Then OFF
If Time 09:59 to 18:59 Then OFF
If Outlet Heater_Safe = ON Then ON
If Outlet DrainPump = ON Then OFF
If Outlet AWC_Fill = ON Then OFF
Min Time 002:00 Then OFF


Heater_Safe
Set OFF
If Temp < 80.5 Then ON
If Temp > 81.0 Then OFF
If Outlet DrainPump = ON Then OFF
If Outlet AWC_Fill = ON Then OFF


Would that work? I want it as failsafe since after the AWC; temperature falls dramatically [I got a second EB8 and third heater for my RO tank] - but this is failsafe including for winter months when one heater cannot suffice.


Should the If Temp > 81.0 Then OFF match the physical outlet at 82.3?

[Raul-7]

Works perfectly; just FYI.