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Old 11-23-2009, 01:27 AM   #1
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Need help understanding honeywell diagram


I am wiring a 2 wire baseboard thermostat into an existing 4 wire. I think it is 4 wire because there are 2 red and 2 black wires going into the old thermostat.

I am confused and do not understand the honeywell diagram.

Can someone help. here is the link to the 4 wire diagram.
http://customer.honeywell.com/TechLi...0s/69-1855.pdf

I have 2 red and 2 black in the junction box. Any help is appreciated.

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Old 11-23-2009, 04:14 AM   #2
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Need help understanding honeywell diagram


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Originally Posted by kingflow View Post
I am wiring a 2 wire baseboard thermostat into an existing 4 wire. I think it is 4 wire because there are 2 red and 2 black wires going into the old thermostat.

I am confused and do not understand the honeywell diagram.

Can someone help. here is the link to the 4 wire diagram.
http://customer.honeywell.com/TechLi...0s/69-1855.pdf

I have 2 red and 2 black in the junction box. Any help is appreciated.
There's a picture of the four wire installation right in the directions. What are you confused about? There are two wires coming from the source(red/black) and two wires going to the heater(the other red/black). In the diagram the lighter wire will be the red and the black is the black. Is the outer jacket of your wires red?


Last edited by jerryh3; 11-23-2009 at 04:16 AM.
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Old 11-24-2009, 09:39 PM   #3
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Need help understanding honeywell diagram


Thanks for your reply. The problem is this. the current old thermostat has 4 wires hooked up. 2 red and 2 black go into the thermostat.

This is where I get confused. the new thermostat is a 2 wire.
the old thermostat has 2 red on top and 2 black on bottom. one red on top is connected to a red in the wall. the other red on top is connected to a black in the wall. on the bottom of thermostat one black is connected to a red in the wall and another black on the bottom is connected to a black in the wall.

I hope this helps you understand why I would be confused.
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Old 11-25-2009, 04:16 AM   #4
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Need help understanding honeywell diagram


Can you post a picture. Look at the diagram again. What you are describing is exactly what is depicted in the installation manual.
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