Programmable Thermostat - http://www.hvacmechanic.com/ Forums

Original message

KEMONI97

72.210.74.113

"Programmable Thermostat" , posted Mon 23 Jun 19:23

I have a traditional Rudd thermostat 6 wires connected as follows:
G - green wire
R - red wire
B - no wire
O - blue wire
Y - yellow wire
W2 - white wire
X - dark gray wire
W2 to E - jumper wire (light gray)
L - no wire

I'm trying to connect a Hunter 44110 which has 5 wire connection labeled as follows:
G -
RC to RH - jumper wire (red)
Y -
W -

How do I know which wires to connect where?

Replies:

Houston204

98.196.66.53

"Re(1):Programmable Thermostat" , posted Mon 23 Jun 20:08

Your new stat is not compatible with your multistage heat pump.

I recommend the Honeywell RTH7400.
G = green
Rc & R = red
O/B = blue
Y = yellow
Aux & E = white
C = dark grey
option 170 = 7
option 190 = 0 (I would expect this to be 1 but you said youre blue wire connected to O not B as it would with A Ruud heatpump)
240 = 9

"Tip of the Day" Remember to remove power first.

kemoni97

72.210.74.113

"Re(2):Programmable Thermostat" , posted Mon 23 Jun 20:46

What tells me I have a heat pump? Because according to the paperwork recieved when we bought the house we have central h & a/c. Am I missing something?

Houston204

98.196.66.53

"Re(3):Programmable Thermostat" , posted Mon 23 Jun 21:04:

Notice that you don't have a W1 wire, only W2. This is because first stage heat is your heatpump.
Notice that you have an O terminal in use. This is to energize the reversing valve on heatpumps for cool mode. Standard systems do not use an O terminal.

Standard systems would have terminals like that 44110.

Most (but not all) heatpump stats have an emergency heat mode.
No standard stats will have an emergency heat mode.

Something like this...

"Tip of the Day" Remember to remove power first.

[this message was edited by Houston204 on Mon 23 Jun 21:17]

KEMONI97

72.210.74.113

"Re(4):Programmable Thermostat" , posted Mon 23 Jun 22:06

Thank you! You were dead on, it makes sense now.

theduke03

24.250.18.179

"Re(2):Programmable Thermostat" , posted Mon 23 Jun 20:16

quote:
Your new stat is not compatible with your multistage heat pump. ...

If I got a nickel everytime you said that... I'd be rich!

"My dad was the most feared furnace fighter in Northern Indiana."

Houston204

98.196.66.53

"Re(3):Programmable Thermostat" , posted Mon 23 Jun 20:26

I can't figure out how so many people do not know that they have a heat pump.

You'd have about $750.

"Tip of the Day" Remember to remove power first.

oldmangobles

64.85.145.187

"Re(1):Programmable Thermostat" , posted Mon 23 Jun 19:58

you have two stage heat,one stage cool-this new t-stat will not work in your application-new stat should say on the box-two heat or two stage heat

old man mike