rth7500 wiring - http://www.hvacmechanic.com/ Forums
Original message
| rdw_330
 |  "rth7500 wiring"
, posted Fri 11 Apr 22:19  
Need some wiring help for a honeywell 7 day programmable thermostat.
system --Split system heat pump --goodman
Indoor airhandler --goodman model a24-10
Honeywell thermostat --modet rth7500
wires from old thermostat Blue (c?) green (g?)yellow (y?)
orange (o/b?) Red (r) white (aux?)
Thanks.
Thanks
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Replies:
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| Houston204
| "Re(1):rth7500 wiring" , posted Fri 11 Apr 22:40:
Yes. Those would be the standard color codes. I noticed that you used question marks. Did you forget to write down your existing Terminal = Color combination?
The color used for common varies and should be verified at your air handler if you are uncertain.
C = blue?
G = green
Y = yellow
O/B = orange
Rc & R = red (use provided jumper)
Aux & E = white (use a jumper wire)
You must also configure this stat for your system.
Set option 170 to 7 and option 190 to 0.
"Tip of the Day" Remember to remove power first.
[this message was edited by Houston204 on Fri 11 Apr 22:42] |
| | clong
| "Re(2):rth7500 wiring" , posted Sat 12 Apr 14:30
How do you configure this stat for your system.
Set option 170 to 7 and option 190 to 0.
How do you access this? I have the tstat wired as shown but heat cuts on when regardless of setting.
clongala
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| | Houston204
| "Re(3):rth7500 wiring" , posted Sat 12 Apr 14:45
"Tip of the Day" Remember to remove power first.
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| | rdw_330
| "Re(2):rth7500 wiring" , posted Sat 12 Apr 06:21
Thank you. I did not forget to label but this is my second programmable, I was using a hunter. I had originally wired this in the winter, heat worked fine. However, the I went to use the ac and I had issues (either not working or blowing hot air). Turns out I had the tstat configured wrong. I have been trying to use/confirm the settings you just recommended. I do see I need an additional jumper between aux and e. I also have a new issue, air handler fan won't turn on (unit outside does) for ac or heat. That just started happening so I wanted to confirm the settings of the tstat and wiring. I had similar issues a few years ago w/the fan. Trying to dig up my bill, it was either the relay or some bearings started to fail.
All of this being said, I appreciated your response. This is way out of my league and I am just trying to take a stab at the first line and educate myself before calling in the techs.
Thanks
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