Changing from a Robertshaw 9420 to a Honeywell RTH7500
#1
01-31-09, 11:18 PM
Changing from a Robertshaw 9420 to a Honeywell RTH7500
Running a heat pump. The new Honeywell combines O and B and says to put B on C. Well, I was not here when the old t-stat came down, so I don't know which is which.
I have a red, yellow, green, blue, brownish, white wires. I've been researching for darn near 12 hours today. Any tips appreciated!
I have a red, yellow, green, blue, brownish, white wires. I've been researching for darn near 12 hours today. Any tips appreciated!
#3
02-02-09, 08:25 AM
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Location: Rochester, Minnesota
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If you were not there, or no one made notes of what letters when to what color, then as Sminker said, you'll have to go to the air handler/furnace, and see what colors letter went to where.
#4
02-02-09, 10:13 AM
Old Connections
The old connections were:
OldT-stat Color
C========Blue
R========Red
Y1======Yellow
E========Brown
W2=======White
G========Green
O========Orange
B========(nothing)
L========(nothing)
New options are:
C
G
Y
O/B
RC
R
AUX
E
L
I appreciate everyones time...
OldT-stat Color
C========Blue
R========Red
Y1======Yellow
E========Brown
W2=======White
G========Green
O========Orange
B========(nothing)
L========(nothing)
New options are:
C
G
Y
O/B
RC
R
AUX
E
L
I appreciate everyones time...
#5
02-02-09, 10:17 AM
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OldT-stat--Color----New
C=====Blue-------C
R=====Red--------R/Rc
Y1====Yellow------Y
E=====Brown------E
W2====White------Aux
G=====Green------G
O====Orange------O/B
C=====Blue-------C
R=====Red--------R/Rc
Y1====Yellow------Y
E=====Brown------E
W2====White------Aux
G=====Green------G
O====Orange------O/B
#6
07-20-10, 07:35 PM
Changing From RobertShaw 9620 to Honeywell RTH7500
I am lost with this whole thing!
I called Honeywell and the tech told me to connect like this:
Honeywell RTH7500
New-stat
C===BROWN
R===RED (Leave jumped between R and RC)
Y===YELLOW
G===BLUE
W2==WHITE (jump between W2/Aux and Y2/E)
O===GREEN
I did this and then turned on AC and it was blowing hot air.
Here is what the wires are connected to on the
RobertShaw 9620
Old-stat--Color
C=====Brown
L=====Blank
R=====Red
Y2====Blank
Y1====Yellow
E=====Blank
G=====Blue
W2====White
O=====Green
B=====Blank
Any help would be very much appreciated.
I called Honeywell and the tech told me to connect like this:
Honeywell RTH7500
New-stat
C===BROWN
R===RED (Leave jumped between R and RC)
Y===YELLOW
G===BLUE
W2==WHITE (jump between W2/Aux and Y2/E)
O===GREEN
I did this and then turned on AC and it was blowing hot air.
Here is what the wires are connected to on the
RobertShaw 9620
Old-stat--Color
C=====Brown
L=====Blank
R=====Red
Y2====Blank
Y1====Yellow
E=====Blank
G=====Blue
W2====White
O=====Green
B=====Blank
Any help would be very much appreciated.
