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Phil
Phil, Mechanical Engineer
Category: HVAC
Satisfied Customers: 6022
Experience:  Retired HVAC/ Electrical & Boiler contractor. Industrial
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Wiring an older Ruud heat pump to new honeywell wifi

Customer Question

wiring an older Ruud heat pump to new honeywell wifi themostat and wires dont match
Submitted: 1 year ago.
Category: HVAC
Expert:  airheatman replied 1 year ago.

Please give me model on new thermostat and tell me what color wires went where on old. If you have a picture of old would be great

Customer: replied 1 year ago.
Honeywell th6320wf.
blue, brown, orange, white, yellow, green, red
Expert:  airheatman replied 1 year ago.

Excellent. While I pull a manual on new thermostat tell me what terminals each of these wires went to (EX Red to R, Green to G, etc)

Customer: replied 1 year ago.
I can't rember.I have the orange labled W2, white E, Blue B, Brown X, Yellow Y, and Red R. The AC worked fine but when I went to turn on the heat for the first time nothing.
Expert:  airheatman replied 1 year ago.

Can you look in the air handle rand tell me what these wires connect to. Or maybe give me model on old thermostat I might can figure this out. (The biggest issue we have is some older themostats used B as COMMON.

Customer: replied 1 year ago.
I believe the brown was common because the themostat worked when the brown was hooked into C. Don't know what to do with the blue.
Expert:  airheatman replied 1 year ago.

Blue should be going to the O/B terminal if it is connected to blue in outdoor unit.

Here is what is normal:

Red is of course power so goes to R with a jumper to RC

Usually there is a Green to G for the fan

Yellow goes to Y for contactors in outdoor

Brown goes to C or common

Blue goes to O/B for reversing valve

There I usually a white to Aux/E, but if you had orange to W2 that is probably your white.

Customer: replied 1 year ago.
That's how I had it wired. The orange and white both in aux/E. Everything worked except heat.
Expert:  airheatman replied 1 year ago.

Ok lets check your setup menu. Tell me what you have function 1 and 2 set to.

Customer: replied 1 year ago.
Now I can't get the thermostat to come on.
Expert:  airheatman replied 1 year ago.

Do you have a voltmeter to check between the Red and brown to see if we have 24 volts?

Customer: replied 1 year ago.
Here is a picture
Expert:  airheatman replied 1 year ago.

If brown was C on old, this should be correct.

Customer: replied 1 year ago.
I don't have a voltmeter.
Expert:  airheatman replied 1 year ago.

Themostat still dead?

Customer: replied 1 year ago.
Yep. Can't get it back on.
Expert:  airheatman replied 1 year ago.

Did you let that brown ire touch anything else? Look in air handler for a little 3 amp purple auto type fuse on board to be blown.

http://i.imgur.com/kYe4Epz.png

Customer: replied 1 year ago.
I don't know how to get into the air handler.
Expert:  airheatman replied 1 year ago.

You will have to remove 4 screws holding panel in place (Not where coil is, but top panel)

Expert:  airheatman replied 1 year ago.

See below

Expert:  airheatman replied 1 year ago.

4 screws (2 if older air handler)

Customer: replied 1 year ago.
Mine doesn't look like those. No auto toe fuse. 2 tube type 60's where the main line comes in and up to where all the writing is I didn't see any fuses. Brown is common.
Expert:  airheatman replied 1 year ago.

What do you have function 1 and 2 set on?

Expert:  airheatman replied 1 year ago.

Leaving office tonight.If you want to continue tomorrow,I will be around