Multiple returns and dual heaters

[Morangus]

I have an external AC pump feeding my display upstairs and an internal DC pump feeding my frag tank, refugium, and manifold in the basement. My dual heaters are in my sump that everything is connected and sharing. What I would like to do is have my heaters only turn off when BOTH returns are powered off, not just one. Is this possible and what would the code look like on the heater outlets?

Thanks.

[SuncrestReef]

Here's one way to do it:

1. Create a virtual output that tracks the status of both pumps:

[Pump_Status] -- virtual output
Set OFF
If Output Pump1 = ON Then ON
If Output Pump2 = ON Then ON


Then add this line to the bottom your existing heater outputs:

If Output Pump_Status = OFF Then OFF

Basically, the virtual output will be turned On if either Pump1, Pump2, or both pumps are On. If they're both Off, the virtual output will remain Off, and this will then prevent the heaters from running regardless of the temperature logic above this new line of code.

[Morangus]

Here's one way to do it:

1. Create a virtual output that tracks the status of both pumps:

[Pump_Status] -- virtual output
Set OFF
If Output Pump1 = ON Then ON
If Output Pump2 = ON Then ON


Then add this line to the bottom your existing heater outputs:

If Output Pump_Status = OFF Then OFF

Basically, the virtual output will be turned On if either Pump1, Pump2, or both pumps are On. If they're both Off, the virtual output will remain Off, and this will then prevent the heaters from running regardless of the temperature logic above this new line of code.

Thank you!