SECO TA2000 to Honeywell T8611G2028

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Old 02-09-10, 07:21 AM
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SECO TA2000 to Honeywell T8611G2028

Hi guys, i'm replacing my old thermostat with the Honeywell as stated in the title. The problem i'm having is that the thermostat is heating and cooling in reverse. When I turn on heat I get AC and when I turn on AC I get heat.

I used this guide to set up the thermostat.
http://customer.honeywell.com/techli...0s/70-6627.pdf
The SECO to Honeywell conversion is on page 94.

The SECO had 6 wires. B, W2, X, R, Y, and G

I believe that this system is 2 stage heat 1 stage cool.

Any help would be greatly appreciated, thanks!
 
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Old 02-09-10, 01:55 PM
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Your unit is wired up different. What color wire do you have wired up to what letter? How was the old stat wire up... What color to what letter?
 
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Old 02-09-10, 09:14 PM
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http://customer.honeywell.com/techli...0s/69-0936.pdf

You wired it correctly, but need to configure it.

Set option 29 to 1.

Installer Setup feature:
— To enter the installer setup, press and hold the
information i key with the increase ∆ (up triangle) and decrease (downward triangle)
keys until the first number is displayed. All display
segments appear for approximately three seconds
before the number is displayed. See Fig. 9 and 10.
— To advance to the next Installer Setup, press the
Time ∆ key.
— To change a setting, use the increase ∆ or
decrease (downward triangle) key.
— To scroll the Installer Setup numbers backward, press
the Time (downward triangle) key.



O/B terminal energized in heating or cooling. = option 29
0 = O/B terminal energized for reversing valve in cooling.
1 = O/B terminal energized for reversing valve in heating
 
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Old 12-01-12, 08:32 AM
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Im having the same problem.

I have a 7 wire system with a Seco TA2000 and i replaced it with a Honeywell RTH6450/RTH6350.
The Seco was wired like this
W2 was brown
O was orange
X was blue
R was red
Y was yellow
G was green
E was white

The Honeywell
W2 is white and brown
G is green
W is orange
Y is yellow
R is red and it is jumped to RC

Any idea if this is a wiring problem or if it is a setup problem.
Thanks.
 
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Old 12-02-12, 07:33 AM
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W2 was brown = Aux
O was orange = O/B
X was blue = tape off
R was red = R
Y was yellow = Y
G was green = G
E was white = E

You must also configure the new stat.
Set Function 1 to 5
2 = 0
3 = 1 (if this option appears)
set all heating CPH to 3
 
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