HVAC

[Yegolev]

Because I might be able to fix this on my own.  Maybe.

Replaced a thermostat but the new one isn't starting the unit.  I haven't put the old one back but I'm not really sure I got the wiring correct since the old had six wires and all of the diagrams that came with the new one have five wires or less.

Old layout:


New layout:


Is anyone able to see where I went wrong?  Originally I had both O and B connected, until I read in the manual to pick one and so far have tried both individually.

You can also see that I don't have a C in the new tstat but I'm assuming B is where the old C goes.  The diagrams I have aren't very helpful in this regard.

EDIT: The old tstat had a "O/B" switch inside and it was set to O.  If that helps.

[01101010]

http://www.doityourself.com/forum/thermostatic-controls/465803-need-help-wiring-new-honeywell-thermostat-my-old-heat-pump.html

[Yegolev]

Well, I didn't try C -> O, if that's what you mean.

[Merusk]

Did you try cutting the blue wire like in the movies?

Electricity/ wiring is beyond my ken. Things that can kill me I leave to the pros who get paid to do it. They have better insurance.

[Furiously]

http://nest.com/ Get an awesome thermostat instead!

[WayAbvPar]

How has no one made a BOB joke yet? I am disappointed in you EVE folk.

[MahrinSkel]

Edit nevermind, misread your table.

Edit2: On second read: Go ahead and try removing the jumper between RC and RH, and try Blue connected to RC and Orange to O.

--Dave

[01101010]

Sorry for the bastard link. I was grabbed by my boss for a huge set of impromptu meetings. Back to the topic, it looks like you have a few things not going to the correct terminals.

That blue wire is the wire that is used to run the front face of the thermostat itself. Now, these are usually run on batteries so clip the end off and tape it off if your new thermostat runs off batteries.

So
blue = (not used here but would go to C)
red = RH which has a jumper to RC
yellow = Y
white = W
green = G  
orange/brown = O

I am not an HVAC person so I have no authority on this, but I have installed a few of them for friends and family. That orange one I believe is for a heat pump.

[HaemishM]

I have nothing to offer to this discussion other than you must post video of your attempts to rewire this in the hopes that we see you shock yourself at least once. 

[Yegolev]

You can't shock yourself with this.  I did blow the fuse, though.

That blue wire is the wire that is used to run the front face of the thermostat itself. Now, these are usually run on batteries so clip the end off and tape it off if your new thermostat runs off batteries.

So
blue = (not used here but would go to C)
red = RH which has a jumper to RC
yellow = Y
white = W
green = G   
orange/brown = O

Winner!  The old tstat had batteries and a C wire.

[Nerf]

You can't shock yourself with this.  I did blow the fuse, though.

That blue wire is the wire that is used to run the front face of the thermostat itself. Now, these are usually run on batteries so clip the end off and tape it off if your new thermostat runs off batteries.

So
blue = (not used here but would go to C)
red = RH which has a jumper to RC
yellow = Y
white = W
green = G   
orange/brown = O

Winner!  The old tstat had batteries and a C wire.

You can shock yourself, but it's only 24v, so accidentally brushing your hand against something and *thinking* that you just got shocked is way worse than actually getting shocked.
Go ahead, try it.   

[Yegolev]

I have a "thing" about being shocked, so I know.  Winter is coming and I'm already tense.

In any case, either I had already blown the fuse or it didn't tingle.

[01101010]

I have a "thing" about being shocked, so I know.  Winter is coming and I'm already tense.

In any case, either I had already blown the fuse or it didn't tingle.

I used to get squirrelly about getting a static shock on doorknobs and such. Then I mistakenly grabbed a live 15amp cable - very weird feeling and luckily I was squatting and fell back to break the connection, but still. The burns on my finger were pretty sick. After that... static shocks don't bother me.

[Selby]

I used to get squirrelly about getting a static shock on doorknobs and such. Then I mistakenly grabbed a live 15amp cable - very weird feeling and luckily I was squatting and fell back to break the connection, but still. The burns on my finger were pretty sick. After that... static shocks don't bother me.

Yeah, after taking a 4kV hit & a 480V 3phase hit, a little 24V doesn't scare me at all.  Not even 120VAC does.

[MahrinSkel]

Same here, after working with high voltage 10kV+ stuff, plugging myself into house current is somewhere below hitting my thumb with a hammer on my list of concerns.  12/24VDC isn't even worth talking about, barely a tingle at most.  Just make sure you're wearing insulating soles and don't ground your other arm.

--Dave

[Yegolev]

I've shocked myself on 120V more than once and I have a scar to prove it.  I still can't stand someone zapping me with static.  Sometimes you don't toughen up.