04-18-2016 03:21 PM
I have used a WEMO Light switch to time my hot water heater and used IFTTT to control it
Wemo lightswitch triggers a relay which in turn triggers a 220v relay that i swiped out of an old Ac Compressor case
The whole thing is stuffed into an old timer box from the electric company (it was never hooked up so i cleaned it out and repurposed it)
even put a lil red light in to see if it is on or not
Here are some pictures
Not the cleanest install but it works just fine
04-21-2016 05:47 PM
04-22-2016 03:19 PM
here is the link that i promised, according to the thread the us version is only rated for 110v but the austrailian version is 240v, if you are in australia or are using the australian model i do apologize but if not then i would reccommend that you disconnect it asap.
04-22-2016 06:51 PM - edited 04-22-2016 07:01 PM
thnx for the info but the switch is only connected to 1 phase which is 110v .. the 220v ac relay has the 220v 2 phase on it since i did not only want to kill 1 phase
the light switch is run with 110v 1 phase and actuates a mini relay which in turn actuates the big 220v relay
the big ac relay gets switched on and off by 110v ...the 220 only pass through the big ac relay and is seperated from the 110v
looking at the open wemo switch i see no reason it can't work with 220v 1 phase system all the components are rated up to 250v ...even the relay is rated for that and with the higher power anything behind the switch will draw less amps .
but then again in the USA you can only get 220v if you use 2 phase which in my case is not the case it is 110v 1 phase
The only thing i have to point out that belkin used crappy cheap capacitors which will likely fail in a year or 2 but i cross that bridge when i get to it and replace em with rubicon ones or hybrid caps
04-26-2017 05:58 PM - edited 04-26-2017 06:05 PM
There's an easier way to do this. With a 220 volt hot water heater and a 110 volt WeMo light switch, just add a 220 volt contactor with a 110 volt trigger that can handle the amperage of the hot water heater.
The trick is to use a normally open contactor that is activated by 110 volts. When the WeMo is powered on, the contactor closes and the water heater is on. WeMo off, hot water heater off.
If you use a contactor, (relay) like I am referring to, the WeMo never sees 220 volts and you don't have to mess with a transformer. Just add the Wemo light switch to a seperate 110 volt circuit that has a neutral.
Alternatively, you could use a WeMo maker and choose a different contactor that was activated by that lower DC voltage instead of 110v AC from the WeMo light switch. That is how most heat pumps are triggered from a thermostat and no one can argue that those are unsafe.
07-30-2017 02:46 PM