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Old 02-01-2010, 08:24 AM   #1
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Thermostat change help needed


I just purchased a house that has a Bard heat pump with a manual Bard thermostat. I have purchased a Honeywell Vision Pro 8000 model TH8321U1006 programable to replace the Bard, when I started to do the change I ran into problems with wire colors to terminals.

Bard Wiring:
Terminal Wire color
G Green
L Black
R Red
X1 Orange
X2 Orange jumper between X1 & X2
B White
Y Yellow
W2 Blue

Honeywell terminals for heat pump
Y2
L
E
AUX
S1
S2
RC
R
O/B
Y
G
C

What color wire to terminal should I use with the Honeywell?
Thanks

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Old 02-01-2010, 07:04 PM   #2
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Thermostat change help needed


Would help to know what the wires were connected to at the air handler.

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Old 02-01-2010, 09:26 PM   #3
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Thermostat change help needed


http://www.bardhvac.com/digcat/volum...100-409(A).pdf

I'd have to wonder about proper emergency heat operation.
What is your heat pump model number?
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Old 02-01-2010, 09:37 PM   #4
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Thermostat change help needed


The addition of a dpdt relay would allow your new stat to work. (If your unit also requires B and W2 energized with E and G for emergency heat)

Last edited by Houston204; 02-01-2010 at 09:49 PM.
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Old 02-02-2010, 12:24 PM   #5
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Thermostat change help needed


Outdoor unit Mod: 24HPQ2
Indoor unit Mod: B24EHQ1

At indoor unit terminal block it is wired
orange to c
green to g
red to r
yellow to y
white to b
blue to w2
brown to e
black to l
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Old 02-02-2010, 12:27 PM   #6
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Thermostat change help needed


I just realized that I left out "Brown to E" on my first post.
Thank much for your help.
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Old 02-02-2010, 06:11 PM   #7
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Thermostat change help needed


Your air handler manual...
http://www.bardhvac.com/digcat/volum...100-069(K).pdf


Heat pump manual...
http://www.bardhvac.com/digcat/volum...100-006(C).pdf

New terminal = Wire (Refer to outer terminal labels on new stat)
L = black
E = brown
Aux = blue
Rc & R = red
O/B = white
G = green
C = orange

option 170 = 7
option 190 = 1



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