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-   -   Thermostat Install Help funny wire (http://www.diychatroom.com/f17/thermostat-install-help-funny-wire-91447/)

jhare215 01-05-2011 08:26 PM

Thermostat Install Help funny wire
 
I am installing a new Honeywell digital thermostat from an old analog one. On the old analog thermostat there is a wire labeled A along with G RC W Y RH(connected to RC). There is no A on the new thermostat where do I connect it or connect it at all ?

The New thermostat has the following labels connectors: Y G RH RC W
Thanks for all your Help

beenthere 01-05-2011 08:37 PM

What is the thermostat connected to.

jhare215 01-05-2011 08:39 PM

Not sure I get what you mean. The old thermostat is connected to the wires still. The new one is not connected to anything. I talking about connecting the wires. I don't know what the A wire is or were to connect it on the new themostat

hvactech126 01-05-2011 09:09 PM

you probably don't connect it to the new stat. but he was asking what equipment you have and if you have checked inside your furnace or air handler what the A wire connects to there. DO you have a heat pump, boiler, gas furnace?

jhare215 01-05-2011 09:12 PM

No Its an electric furnace and the old stat has six wires and the new stat only has a place for 5. and the odd wire is labled "A". So should I just cap it off. Sorry about the confusion. and thanks

BTW I haven't looked at the inside of my unit

hvactech126 01-05-2011 09:15 PM

is it electric only furnace, no heat pump? Can you post a pic of old stat?

jhare215 01-05-2011 09:18 PM

one second I think i can

Marty S. 01-05-2011 09:20 PM

Go look and see what the other end of the wire is connected to.

jhare215 01-05-2011 09:30 PM

http://tinypic.com/r/15s4nkn/7

here its a rough picture took it on a cell phone maybe you can see something

http://tinypic.com/r/15s4nkn/7

The brown wire is labeled yellow

and the yellow is the wire that is marked A

hvactech126 01-05-2011 09:38 PM

i agree open furnace door and see what A is attached to

jhare215 01-05-2011 09:44 PM

the wires are not even the same color inside the unit. I have no idea. Could you tell something from the picture its a clickable link.

hvactech126 01-05-2011 09:49 PM

do you have a model of old stat or name brand?

jhare215 01-05-2011 09:53 PM

White-Rodgers
heating- .15-1.2 AMP
Cooling-1.5 AMP MAX
Max 30 volts
Type 1F56W-444
Class 2
That is what it says verbatim off the old stat

hvactech126 01-05-2011 10:04 PM

SPECIAL SYSTEM CONFIGURATIONS
Electric Heat Furnaces (Single Transformer Systems
Only)
The subbase as shipped may not operate the fan correctly.
If both the heating and cooling system must operate
the fan relay, remove the yellow factory-installed
jumper wire from the Y terminal and connect it to the A
terminal. The fan should now cycle when the thermostat
calls for either heat or cool.

tape up A and don't use. set new stat to electric heat so it controls fan in heating and cooling

jhare215 01-05-2011 10:07 PM

Thank You very much I will tape up A and hook up everything else like normal. SO just out of curiosity what does the A do ?


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