3 ton split ac

[Helltownhero]

I have 6 1000w hps lights in my flower room...i installed a Mitsubishi 3 ton split ac..balasts are in the room aslo.. im running compressed co2...i just want some reassurance that this will be plenty to keep my room at 85 degrees..also my hoods are not air cooled..thanks guys

 

[Renfro]

You will be good.

 

[Helltownhero]

You will be good.

I was accually told it could handle 10 1000w i dont kno how true that it...i suck at math so i said screw it on the formula haha my dimentions are 10'6"×10'6"×9'

 

[Renfro]

I was accually told it could handle 10 1000w i dont kno how true that it...i suck at math so i said screw it on the formula haha my dimentions are 10'6"×10'6"×9'

My rooms run 10kW of light total in each. They both have a 4 ton unit. 10kW pretty much maxes out my units, the 4 ton unit in the daytime room can't keep up when it's really hot outside but it's ok if it's only 70 outside. That tells me that it's right at it's limits. 10kW on a 3 ton wouldn't be advised.

 

[Helltownhero]

My rooms run 10kW of light total in each. They both have a 4 ton unit. 10kW pretty much maxes out my units, the 4 ton unit in the daytime room can't keep up when it's really hot outside but it's ok if it's only 70 outside. That tells me that it's right at it's limits. 10kW on a 3 ton wouldn't be advised.

So im thinking 8 1000ws is max ?

 

[Renfro]

8kW on three tons, would push the limits. You would probably have issues if it's 90+ outside.

 

[Helltownhero]

8kW on three tons, would push the limits. You would probably have issues if it's 90+ outside.

I live in new england so i would only have to worrie about that july and august...what if i run my lights at night?

 

[Renfro]

.what if i run my lights at night?

That helps a lot, my night room is fine and my day room has issues in July and August. Both rooms have the same setup.

 

[Helltownhero]

That helps a lot, my night room is fine and my day room has issues in July and August. Both rooms have the same setup.

Im only running 2 600mh in that room right now for veg while i build my veg room so i wont be flowering in there untill september so i should be okay by then...thanks man

 

[Renfro]

Something I do for grows that are pushing the AC to it's limits.

Get a lighting controller with dual trigger cords.

Get a high temperature shutoff. The Titan Zephyr 2 is an example. http://www.titancontrols.net/shop/product/titan-controls-zephyr-2-high-temperature-shut-off-with-delay

Plug the Zephyr into the timer (may need an extension cord and a plug adapter to plug in one side of the controller as well) You end up with one side of your controller on the timer and the other side on the timer through the Zephyr.

Hang the temperature sensor at the canopy level under the lights where it's hottest, and plug the trigger cord for one side of the controller into the Zephyr.

Now set the temperature that you want it to react and shut down the lights that you plug into that side of the controller. It will have to cool down by 10 degrees before it considers the room ok so tweak your settings accordingly.

Set the start delay, this is how long it will wait after the room has cooled down 10 degrees before it turns the lights back on.

So lets say you set it at 90 degrees. If the temperature hits 90 it turns off a few lights. The AC catches up and brings the temperature down, then the controller waits the delay time and turns the lights back on.

This prevents you from frying a crop. You can pick the lights that are on the shutoff, in my case I have all my side lighting shut down, thats 3600 watts. I use a delay of 15 minutes. If it's 100 outside it will usually shut off the side lights a two or three times a day.

Note that when the lights turn on by the timer, the Zephyr will wait for the delay time before it kicks on the lights.

 

[Apalchen]

It's the perfect size for them, I run 4 lights on a two ton and it works good. I could maybe get by with one more but would be pushing it. I would say they meant 10 air cooled hoods which is at the limit of what I think it could do. Best bet when figuring ac is 6000btu per 1k fixture and 4000 btu per air cooled 1k fixture.

Also I have the gavita controller and it helps with what renfro is talking about if my room gets to warm my lights start to dim automatically and if it still gets hotter they will shit off altogether which is a nice feature since I've heard of people baking a whole room cause of ac failure

 

[Renfro]

Best bet when figuring ac is 6000btu per 1k fixture and 4000 btu per air cooled 1k fixture.

Thats a very good way to math it out. You can even go so far as to math a SE 1kW HPS at 5500 and the DE at 6000.

If he goes to 8 lights it's gonna be expecting them to only put out 4500 BTU/hr each and I doubt they will run that cool without air cooled hoods or being dimmed.