Help Wiring New Thermostat

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Old 09-25-13, 09:39 PM
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Help Wiring New Thermostat

I am trying to wire up my new Honeywell Pro TH4000 thermostat but am running into some trouble. The wiring guide has totally different labels than the wires coming out of my furnace.

My furnace has the following wires coming out of it:

Label --- Wire Color
G Green
R Red
W/W1 White
W2 Blue
Com24V Black

The Honeywell thermostat has the following connections
2H/1C Heat Pump System
C (24 Vac commons)
B (Changeover valve energized in heating)
R (power)
L(sends output when set to Em. Heat)
O (changeover valve energized in cooling)
G (Fan relay)
Y (compressor contractor)
Aux (auxiliary heat relax)
E (emergency heat relay)

Or

1H/1C Heat Pump System
C (24 Vac common)
B (changeover valve energized in heating)
R [R + RC joined by jumper]
Rc (power)
O (changeover valve energized in cooling)
G (fan relay)
Y (compressor contractor)
W [W+Y joined by jumper]

There are also configurations for 1H/1C System, heat only system, and heat only system with fan in the installation guide. I'm not sure which applies.

How do I wire up the thermostat? Thanks!
 
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Old 09-25-13, 09:51 PM
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I see that you posted in the heat pump section.
Do you have an outdoor unit as well as a furnace?
If you do not have an outdoor unit, you do not have a heat pump.

Do you have a TH4110 or a TH4220 thermostat?
The TH4110 does not support 2 stage heat.
 
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Old 09-26-13, 10:39 AM
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Hi Houston204,

Sorry about posting in the wrong section.

I have a TH4110 thermostat. After doing a bit of research I came to the conclusion that Comm24V (Black) should be connected to C, and W2 (Blue) should go to B. I'm still clueless with respect to the other 3 wires.

Thanks again.
 
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Old 09-26-13, 10:54 AM
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Label --- Wire Color = stat
G Green = G
R Red = Rc & R
W/W1 White = W
W2 Blue = W (the new stat does not support 2 stage heat)
Com24V Black = C

Move the switch behind the new stat to Gas/Oil.

option 1 = 0
5 = 3
9 = 3
13 = 1
14 = 0
15 = 5

What is the make and model of the furnace? You may have a switch in the furnace to help your 2 stage furnace run with your 1 stage stat if you do not wish to purchase the correct stat.
 
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Old 09-26-13, 05:58 PM
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The furnace is a Carrier WeatherMaker 8000 two-speed high efficiency gas furnace.

Here are a few shots of the wiring on it:

http://i.imgur.com/fDeS3gH.jpg
http://i.imgur.com/yViDFGc.jpg
http://i.imgur.com/zziMxZ5.jpg

One more question:

option 1 = 0
5 = 3
9 = 3
13 = 1
14 = 0
15 = 5
What are these options for? Is this in the thermostat settings once I get it wired?
 
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Old 09-26-13, 06:08 PM
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Yes, these are thermostat settings.

Can you post the furnace model number?
 
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Old 09-26-13, 06:14 PM
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Since this thermostat only supports one stage, would it make sense to go back to the store and exchange for a two stage? Or does it not matter very much? The reason I bought this specific model is because I was told it supports a two stage heating system but as it turns out they were wrong.

Again, thank you so much for your fast replies! Extremely helpful.
 
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Old 09-26-13, 06:49 PM
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I'd get a multistage Honeywell stat but you can probably move a toggle on the furnace control board to energize stage 2 after a 10 minute demand.

The furnace model number can get us the manual.
Is this a 58UHV Carrier furnace?
The 3rd and 4th numbers in the serial number indicate year.
What is the year of manufacture?
 
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