Originally Posted by
clsanchez77
Like the sayin' goes, "If it ain't broke, then don't fix it!" So like you said, the Apex for backup. Since you are running your Apex at 77 for heat, then I would set the Apex so that at 77.5 (or 78, whatever you want), set the alarm, send you an email and shut off the ranko and pump by plugging them into an energy bar. This will perform the emergency shutoff and let you know via email and audible alarm that your Ranko and/or feed pump has failed on.
Then, find out what is the normal low temperature for your tank (I'm sure this setup is not holding exactly 77) and I would set another alarm and email at either 0.5 or 1 full degree below this normal low. This will then let you know the Ranko and/or feed pump has failed off.
So assign an energy bar outlet to the Ranko and name it appropriately, say [Ranko_Cont] and set the program to:
[Ranko_Cont]
Fallback On
Set On
If Temp > 77.5 Then Off
Normally you would use Fallback and Set to off for temperature controls, but since the Ranko is your primary and this is serving as an emergency off, you will set them to on. Then for your Alarm and Email:
[SndAlm_16]
Set Off
...<other alarm settings>
If Temp > 77.5 Then On
If Temp < 76.5 Then On
...<other alarm settings>
[EmailAlm_15]
Set Off
...<other email settings>
If Temp > 77.5 Then On
If Temp < 76.5 Then On
...<other email settings>
Its up to you what number you want to use and/or what settings you want for the alarm vs the email.
As a final note, if your circulation pump is quite a distance from your tank, then run some thermostat cable and use a 12v relay that is powered before the Ranko and then signaled via a transformer at the energy bar.
Good luck.
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