programming question

[tonkadawg]

I've got my heaters and lights (MH) programmed something like:

if temp < 77.5 Het1 On
if temp > 79.5 Het1 Off
if time > 1400 LT1 On
if time < 1800 LT1 Off

- this all works as expected.

then I do something like:

if temp > 81 LT1 Off
if temp < 77 LT1 On

- this is the problem. When I check on the tank in the morning - my MHs are on, when they should be off. Obviously the temp dropped below 77, but since time is < 1400, shouldn't my ACII keep the MHs off and turn on my heater?

Any advice on how to troubleshoot this is greatly appreciated.

 

[clp]

Don't put the 'if Temp < 77' statement in the program. Instead do something like this:


if time > 1400 LT1 On
if time < 1800 LT1 Off
if temp > 81 LT1 Off
Max Change 030 M Then LT1 OFF

The max change statement keeps LT1 off for at least 30 minutes before it is allowed to turn back on.

Curt

 

[tonkadawg]

Curt, thanks for the quick reply. I will go ahead and do as you suggested.

Thanks!

Matt