No RC terminal on new thermostat?
Hello:
I saw your name on an internet search for thermostat wiring problems, so I thought I would try you for this one. I could not get help elsewhere.
I have an oil burner, and a separate a/c unit. I installed a programmable thermostat 2 years ago that works well, although the location is in a bad place since we did some remodeling and an addition. So, I bought a TOTALINE 1000RF wireless thermostat and 1100REC receiver. The plan was to put the receiver in the same place and put the transmitter near the bedrooms.
The current wiring scheme has these wires
RH,RC,Y,G,W
The new thermostat has R/RH,Y,G,W,C - the R/RH is one terminal and there is no mention of an RC whatsoever in the manual or sample wiring diagrams. No matter how I hook it up, it does not work. At the furnace end, it looks like I have 2 transformers, and one of them looks to control a relay of some sort. This transformer/relay set up is inside the furnace so I assume that is what it operates. The other transformer is external to the furnace. I tried to trace the wires, but they switch over to the wires that go to the thermostat somewhere in the walls.
Any help on this one? Of course the on line store I bought it from is absolutely no help (thermostatshop.com). No return calls nor will they give me an RMA to return it. If I can get it to work, it would be the perfect solution. And, no, there is no way to re-wire the run to the desired location.
Thanks in advance for any help.
Dean Sabins
Wiring question -hopefully the last one!
:D Hello: Again, thanks for the help. I traced all the wires. The second 'mystery' transformer was connected to a defunct humidifier, so that is out of the picture. Here is what I have. There is a 5 place terminal block attached to the 'good' transformer that has the expected YWGCR connections, however, they are not hooked up that way.
There are two (2) 3 conductor wires going to the thermostat one with Red and White (blue not used)- I'll call these R1,and W1. The second is a red, blue and white called R2,B2 and W2. There is a red and white going to the outside a/c unit called R3 and W3
First of all, the transformer leads are connected to C and G on there terminal block. The first letter in each line below is what is on the transformer block:
Y is connected to nothing
W is connected to W3 and R2 (which is labeled Y at the thermo)
G is connected to W2 (which is labeled G at the thermo)
C is connected to R3
R is connected to B2 (which is labeled RC at the thermo)
There is also a Honeywell Intermittant Ignition device that has R1 (labled RH at the thermo) and W1 (labled W at the thermo).
Now I am more confused. I guess the best bet is to eliminate the wiring to the thermo and wire up the new thermo receiver at the furnace properly using the transformer terminal block with the conventional letter codes. Help me out one more time. Remember, there is no RC connection available on the new thermo receiver, only W1/O,W2,Y1,Y2,R,G,C
Thanks, Dean