Thread: Please help me! Wiring a Maestro II

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I hope someone here can help me. I AM NOT AN ELECTRICIAN!!! I have a Maestro II controller, and I'm confused on how to wire it up. I have a 120v valve (Norgren V60), with a three wire (grounded) plug wired to the coil. The schematic says I need to wire a 24v transformer between the controller, and the valve, but I'm not sure how to do it. I know that the valve still needs to be connected to a power supply, but I don't know how to insert the transformer, and make it all work right. Can someone please, PLEASE help me?

P.S. The instructions say the controller will handle up to 120 volts, but it is not recommended. What will happen if I wire the valve directly to the controller?

This is for informational purposes only, and I assume no risk if you injure yourself....but, the common way to hook up a solenoid valve to these guys is to connect one lead from the valve to a power source, the other lead from the valve to the NO contact on the controller, and the C(ommon) from the controller to the other side of the power source...I'm not sure why they say use a 24v adapter, unless you have a 24v valve...maybe it's just an example hookup?

If your valve is 120v AC, it will have a green (ground wire) which has nothing to do with the controller, as there is no place on the controller to actually ground to. The other 2 leads from the valve would be connected as described above.

If I remember correctly, the internal relay of that controller can handle up to 250v..therefore, the contacts should be able to handle 120V AC solenoid valve.. I use it to control 120v valves with no problem. The only reason I could see them not recommending it would be b/c of the valve coil's "flyback" or electrical interference, which may cause instability with the controller's circuitry, but I have not had that problem...or they don't want to be held liable for electrocution...BE CAREFUL...

Thank you, Thank you, Thank you! I was hoping that was the case. I guess I just needed some assurance that I was not going to burn my garage down. So, I take the plug from the valve, and wire one lead to the valve, and the other to the controller, correct? Same thing with the light, yes? One lead to the light, the other to the controller?

Yes, one lead from the valve to the NO contact on channel 1, other lead from the valve to power source, and connect the remaining lead (from power source) to the "C" or common on the controller....same for the light on channel two....but make sure both "C"ommon ports on the controller are connected to same side of the power (i.e. just share the common between the two by making a jumper)...

So

C (channel 1)------------ one side of power source
C (channel 2) ----------- same side of power source as channel 1
NO (Channel 1) ---------one side of valve
NO (channel 2) ----------one side of light

The remaining leads from light and valve would go to the "other" side of power source..

Craig

Thank you, Craig! I think I'll be able to figure it out now. I appreciate your help! As I said, I am not an electrician, so how would I go about making a "jumper"?