I am using the controller for my greenhouse. I want the cooling fan to only come on at 90f. And i want the heater only to come on at/ below 30f. So my safe temp range is between the two. Would i just need two separate controllers for this scenario? Thanks for any help!
Hello,
May I know your desired heating and cooling stop temperatures?
Because the hysteresis values (HD and CD) of the ITC-308 can be set to a maximum of 30°F. However, the heating and cooling stop values must be the same.
For example, setting TS=60, HD=30, and CD=30: When the temperature reaches or falls below 30°F (TS-HD), the ITC-308 will activate the heating output until it reaches 60°F and then shuts off.
When the temperature reaches or rises above 90°F (TS+CD), the ITC-308 will activate the cooling output until it reaches 60°F and then shuts off.
Therefore, if the heating and cooling stop values are different, I recommend using two controllers. If they are the same, perhaps you could consider whether these settings meet your needs?
Thanks for the information. It seems that i probably do want 2 separate controllers. The temp is safe between 30f and 90f, and would get expensive to heat all the way the 60 for the stop point. Thanks for explaining how that works.