Totaline P274-0200 to a RTH7500 - http://www.hvacmechanic.com/ Forums

Original message

good1973

65.0.212.152

"Totaline P274-0200 to a RTH7500" , posted Fri 16 May 21:59:

Hello,

This is my configuration....old then new

TERM = WIRE

R=RED
Y/Y2=YELLOW
G=GREEN
C=BLACK
W/W1=WHITE
S2=BROWN
S1=LIGHT BLUE
O/W2=ORANGE

C=BLACK
G=GREEN
Y=YELLOW
O/B=ORANGE
R=RED
AUX= ???? (i am guessing BLUE)
E= ???? (i am guessing BROWN)
L= ???? (WHITE is the only one left)

Unit is a Heil heat pump

[this message was edited by good1973 on Fri 16 May 22:01]

Replies:

Houston204

98.196.66.53

"Re(1):Totaline P274-0200 to a RTH7500" , posted Fri 16 May 22:39

New terminal = wire
C = black
G = green
Y = yellow
O/B = orange
Rc & R = red (use provided jumper)
Aux & E = white (use a jumper wire)
Tape off your old brown and blue wires since that outdoor sensor will not work with your new stat.

Set option 170 to 7 (multistage heatpump.
Set option 190 to 0 (O/B terminal is O)

"Tip of the Day" Remember to remove power first.

good1973

65.0.212.152

"Re(2):Totaline P274-0200 to a RTH7500" , posted Sat 17 May 01:11

thanks...working so far so good