Relay to turn pumps off?

[flyer81]

I am using a Sentinel CHHC-4 controller. It works great. The only issue I have is that in my room I have the temperature under control. Its the humidity that gets me. So on the humidity control I have two 10" fans that exchange the air in the room. The problem is that I am also using CO2. I have a water pump tied into my controller which then kicks on a tankless water heater. The CHHC-4 unit allows you to lock the CO2 to the temperature but not the humidity. If the CO2 is on at the same time the fans are on... I am just wasting gas.

So... outside of getting a new higher end controller that will shut the CO2 off when the humidity control turns on... my thought was to use a relay of some sort. My thought was 3 cables. 2 for the power to the water pump and the other tied into the humidity control. If the power was off the relay would remain closed and power would flow to the pump. But if the power comes on, the relay would open and cut the power to the pump. Is something like this doable? Any other ideas?

I am using an Ecoplus 1257 pump which uses about 240 watts.

 

[Weed Killer]

are you using the cooling output for your fans?, If so selecting interlock on temp/humid will turn off the co2 when the fans kick on

 

[catalina3899]

Hi flyer81

I posted somewhat the same question several days ago with little results. My search found a thread posted by the honorable Mr. Robinson who touched on the subject. I assume you could use a humidity device instead of timer.

https://www.icmag.com/ic/showthread.php?p=3856938&highlight=flip+flop+relay#post3856938

 

[flyer81]

Well shit, that looks like that will do the trick. I had heard about these but dont use it in my system as I dont have the space (no sense in breaking 200sq ft down to two rooms) so i never looked at them. But that looks like it will do exactly what I need. Instead of using a timer I just run a plug to my controller box and that will activate the relay. Rather than two light systems I have my pump on one side of the relay and the fans on the other.

THANK YOU!

This is important to me as I come into the summer months. I want to keep the CO2 going as in this latest harvest I have buds as big as my fist almost. I have never attained this level of quality before and dont want to go back. Best part... its the same cut I have been using in my entire 2 year growing career now. As the environment gets better and control over the system gets better, the bud gets better. Yee haw!

 

[flyer81]

I think I should do a write up on this because now that I think about it there are some more applications to what we would typically call a flip flop relay. .

In addition to what I have already discussed, I found that the circuit I had been running my two lights on is warm to the touch. No bueno. So I need to break the 2 1k lights onto seperate circuits. Now... I could put in a 240v line no problem. But Im lazy and I already have 2- 20amp circuits right there. But how to use them using only one timer? Thats where these relays come into play.

Turns out the solution to that problem is the exact same as my problem with the environment controller. Flip flop relay, multi circuit one timer relay, controller relay. All the same device... just wired slightly differently and different combinations of relays.

 

[catalina3899]

That's great my friend. Glad to help. Looking forward to your write up.