9 69-1199—4
Table 2. Terminal Designations on Old and New Thermostats.
aIf both RH and R terminals are present on existing thermostat, remove jumper and connect Rh to R and R to Rc.
bDo not connect both O and B when wiring to a single stage 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 wiring hole in the wall.
STEP 5. INSTALL THE BATTERIES
IMPORTANT
Three fresh AA alkaline batteries must be installed for pro-
gramming and operation of the thermostat and the heat-
ing/cooling system.
qInstall 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 RPower
Rc, RaRc Powe r for cooling
W, W1, H W Heat
Y, Y 1, M Y Cooling
G, F G Fan
O O Changeover in cool. (Single stage heat pump only).
BbBbChangeover in heat. (Single stage heat pump only).
Cc, Xc, BbDo not connect. Transformer common
W2, H2Do not continue installation.
Call 1-800-468-1502.
Second stage heat.
Y2Second stage cool.
M10622
INSTALL 3 AA ALKALINE BATTERIES
AS SHOWN, POSITIVE (+) TERMINALS
TOWARD TOP.
W
A
LLPL
A
TE
B
RRCOWYG