Greenhouse

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Today I made a phone call to the distributor of the heater. I found out that the thermostat that I have installed already is to be used as a jumper so to speak between the to connection points for the thermostat shown on the diagram. Silly me,, I was looking at this the wrong way.

The project is almost finished. All that is left is to strap some conduit, ground the structure and install a lock on the breaker for the heater. Everything is up and running and now I have learned how to wire a greenhouse.

I spent about 4 days on this, 3 of those days was just me. Pulling wire is not fun all by myself and the HO did not help by already having alot of plants in the greenhouse. I felt like a bull in a china shop.

We did lose money on this as one member posted we probably would, but I guess you gotta pay to learn something.

Thanks for all the helpful replies.
 
The greenhouses I have seen for our parks dept have two sheets of poly plastic laid over the frame with a 200 CFM fan that inflates the air space for insulation.
 
I've done quite a few of them, even designed and built a custom controller for five of them when the customer kicked out the controller vendor for not having such a great product. These houses had a shade cloth, ridge vents, exhaust fans, motorized shutters, gas heaters, all of which were automatically controlled. I even had an override switch that closed the ridge vents during downpours to keep the customers dry. One thing to watch out for is the ridge vent motors were dual winding, one winding for forward, one for reverse with a common tie. If more than one motor was connected to a single output, the other motor would backfeed the first motor if it arrived at the closed or open position first, energizing both windings on the other motor causing it to overheat. A simple isolation relay cures that problem. PVC is preferable to emt due to the corrosive atmosphere, but have done them in both. The bad thing about the pvc is unless you can strap it really well, it looks like crap after awhile due to the heat.
 
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