Relay for 220V heater?

project_power

#1

I’m looking for a good SmartThings-compatible switch that can control a 220V 2A wall heater. I’ve looked at the Enerwave ZWN-RSM1S and Aeotec Micro Smart Energy Switch but it’s not clear to me if either can be used with a three-wire 240V circuit. Anyone done something similar? Looks like the Smartenit ZBMLC15 Zigbee switch could do it, but it’s more expensive and I need to put in 4 of these.


(Austen) #2

Not getting too technical - but you can always use a high voltage contactor and then use the micro switch as a relay (If you are unsure, would be 99% safer technically)

Which means buy an Aeon Microswitch:

Then buy a contactor:

Then this is how the contactor is wired, using the Aeon as the ‘120v’ relay:

That should do it… the new second gen Aeon handles up to 220v but does not have a 3 pole capacity for high amperage.


#3

Thanks., that does seem like a viable option. The Smartenit ZBMLC15 is looking like the simplest option and it’s listed on the compatible devices page but I’ll keep researching options.


(larance) #4

I’d agree with Austen, doing it this way will save you money later on if/when the relay fails (usually burned contacts). From my experience high voltage contactors fail much more frequently than low voltage ones.


(Daniel C) #5

Look at my post about the Elk 9200. This does work great, but the discription on Elk’s website makes it appear that it is already z-wave/zigbee compatible.


#6

Used the ZBMLC15. Works very well for this particular purpose (2A load). Had to manually add them to Smartthings even though they’re listed on the Smartthings website as compatible.