Since I started eating my own dog food (but more about that later), I've met with the same problem many of other DZ users already have: the fact that system is not quite that accessible. Easy to control, yes, but not accessible. You can't just push a button passing by the thermostat in the hallway.
And the worst situation you may find yourself in is when you're asleep or away, and someone in the house wants things warmer or colder. Oh no, you don't want that (yeah, and that tooth had to be removed anyway).
But there is a solution.
How It Works
Determine Wiring Scheme
Careful! your HVAC installer may have used different colors, you have to look at the markings, not at the wire color!Get yourself a piece of thermostat cable, or just find appropriate wires.
Connect the relay board
CaveatsThere are two common thermostat connection schemes - (white and yellow) vs. (yellow or white and orange) or (yellow or white and blue). Orange and blue wires are mode selectors - you need to know which exactly is the scheme your thermostat uses. For example, RTH7500 uses yellow plus orange ("energize to cool") and I connected it to NC contacts, since most of the year the thermostat is in cooling mode. Your mileage may vary.
Congratulations, you're doneSo how does all this help you? Simple.
- Press the "Use Schedule" button (or the equivalent);
- (optional) Disconnect the power to the relay board.