9 69-1284—2
Table 2. Terminal Designations on Old and New Thermostats
aIf both RH and R terminals are present on existin
g
thermostat, remove jumper and connect Rh to R and R to Rc.
bDo not connect both O and B when wirin
g
to a sin
g
le sta
g
e heat pump. Connect O to O. Tape off B.
cTape off end of the wire with electrical tape and push the taped wire back into the wirin
g
hole in the wall.
STEP 5. INSTALL THE BATTERIES
IMPORTANT

Three AA alkaline batteries are included with the thermostat.

Batteries must be installed for programming and operation of

the thermostat and the heating/cooling system.

❑Install the batteries in the wallplate so the positive terminals all point
up (see illustration).
Terminal on Old Thermostat Connect To Description
R, RHa, 4, V R Power
Rc, RaRc Power for coolin
g
W, W1, H W Heat
Y, Y1, M Y Coolin
g
G, F G Fan
O O Chan
g
eover in cool. (Sin
g
le sta
g
e heat pump onl
y
).
BbBbChan
g
eover in heat. (Sin
g
le sta
g
e heat pump onl
y
).
Cc, Xc, BbDo not connect. Transformer common
W2, H2Do not continue installation.
Call 1-800-468-1502. Second sta
g
e heat.
Y2Second sta
g
e cool.
M10622
INSTALL 3 AA ALKALINE BATTERIES
AS SHOWN, POSITIVE (+) TERMINALS
TOWARD TOP.
WALLPLATE
B
RRCOWYG