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Step 5. Install The Batteries - Honeywell CT3600 Owner's Manual

Seven day programmable heat and/or cool low voltage (20 to 30 vac) thermostat and wallplate
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Terminal on Old Thermostat
a
R, RH
, 4, V
a
Rc, R
W, W
, H
1
Y, Y
, M
1
G, F
O
b
B
c
c
b
C
, X
, B
W
, H
2
2
Y
2
a
If both RH and R terminals are present on existing thermostat, remove jumper and connect Rh to R and R to Rc.
b
Do not connect both O and B when wiring to a single stage heat pump. Connect O to O. Tape off B.
c
Tape 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
Install three AA alkaline batteries. 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).
If the thermostat is already mounted on the wall, remove the
thermostat by placing your thumb between the thermostat and
wallplate and pulling the thermostat up and away as shown.
Table 2. Terminal Designations on Old and New Thermostats
Connect To
R
Rc
W
Y
G
O
b
B
Do not connect.
Do not continue installation.
Call 1-800-468-1502.
Power
Power for cooling
Heat
Cooling
Fan
Changeover in cool. (Single stage heat pump only).
Changeover in heat. (Single stage heat pump only).
Transformer common
Second stage heat.
Second stage cool.
INSTALL 3 AA ALKALINE BATTERIES
AS SHOWN, POSITIVE (+) TERMINALS
TOWARD TOP.
9
Description
WALLPLATE
B
R
RC
O
W
Y
G
M10622
69-1642

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This manual is also suitable for:

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