Does anyone have a suggestion on how to automate a Panasonic Whisper Comfort FV-04 spot ERV? It is in an area that is sometimes unoccupied, so I would like to automate its "off" and "on" switch to be tied to a motion sensor in the area.
The challenges are:
- The existing wall switch for this ERV is a single gang stacked, double wall switch. The top switch turns the unit "on" and "off", the bottom switch toggles the fan between high and low.
- The wall top switch is actually an on / standby switch, rather than an on / off switch, and per the manual the unit still uses power when the wall switch is presumably off but really in standby. Thus, I am not sure if the wires to the switch actually have line voltage.
This is the wiring diagram from Panasonic:
The two switches on the left side of this diagram are the wall switches. The switch labeled "Main Switch" is internal to the unit and not something I will mess with.
The single gang double wall switch is in a double gang box with a light switch, so I think there is a load line available in the box.
In addition to automating the on/off, the ERV on/standby switch still needs to allow manual on and off, and obviously the low/high switch needs to work manually. I don't have any need to automate the low/high switch. Either Zwave or Zigbee would be fine.
Any ideas? Is this even possible?
I'm aware of three zwave/zigbee double switches, but not sure any would work:
The Aquara seems like it is two on/off, so don't have to worry about unwanted dimming, but it does not seem to be UL rated:
The Zooz, linked below, and the unavailable Inovelli both have dimming on one of the paddles, so I'm guessing neither of those would work.
Zooz also has a scene controller - not sure if there is a way to make it work?