System Setup
Preferences (optional)
Wiring Notes
1
2a
12b
Use the Setup and Navigation steps in 12a to set Display Preferences.
Step 1
Press and release the left button.
Conventional system
Function
Settings & Options
Set To
Fri
0300 Manual/Auto
0
1
Manual changeover (Heat/Cool/Off).
PM
Alternate wiring (conventional systems)
7
2
6:30 72
NOTE: Some functions may not appear due to
System
Fan Auto
Changeover
Automatic changeover (Heat/Cool/Auto/Off). Automatically turns on Heat or Cool based on room
temperature. Note: System maintains minimum 3°F difference between heat and cool settings.
Fahrenheit
Cool
thermostat model or previous selections made.
C
C
Remove metal jumper connecting R and Rc only if
you must connect both R and Rc wires.
3
System & Fan
Schedule
Clock & More
0320
Temperature Format
0
1
0
1
2
G
G
Y
(
°F/°C)
Celsius
If your old thermostat had both R and RH wires,
remove metal jumper. Connect the R wire to the
Rc terminal, and the RH wire to the R terminal.
Y
MCR33839
Step 3
0330 Daylight Saving Time
Off: No adjustment for daylight saving time.
W
RC
R
On/Off
On: Auto-change to daylight saving time (for areas that do not use the new 2007 DST calendar).
On: Auto-change to daylight saving time (2007 and beyond, for areas that use the new 2007 DST calendar).
W
1
2
Press s t to change setting.
Step 2
Press NEXT to advance to next function.
If your old thermostat had only 1 C or C1 wire,
connect it to the C terminal. If your old thermostat
had 2 C or C1 wires, wrap each separately with
electrical tape and do not connect them.
Press and hold the center button until the screen
changes (approximately 5 seconds).
Rc
R
2
0
500 Furnace Filter Change 0 Off (no reminder)
3 Press DONE to save & exit.
Reminder
1
2
3
4
5
6
1
0
Reminder in about 1 month
Reminder in about 3 months
Reminder in about 6 months
Reminder in about 9 months
Reminder in about 1 year
Reminder in about 3 years
On
2
W2
Y2
W2
0
120 20
System
Heat Off Cool
Fan Auto
Y2
MCR32160
System
Go Back
Next
Done
Fan
Done
0
530 Smart
MCR33840
MCR33841
Response®
Technology
Off
Heat pump
0
600 Maximum Heat
Temperature Limit
0
610 Minimum Cool
Temperature Limit
0
640 Clock Format
90°F (other options: 40-89°F [4-32°C])
50°F (other options: 51-99°F [11-37°C])
12 12-hour clock (i.e., “3:30 pm”)
Connect wires: Heat Pump
HEAT PUMP
HEAT PUMP
Function
Settings & Options
20 = Year 20xx
1
2
. Match each labeled wire with same letter on new thermostat.
0120*
Year Setting
C
G
A
u
x
Aux
E
. Use a screwdriver to loosen screws, insert wires into hole under
screw, then tighten screws until wire is secure.
G
(
first two digits)
130* Year Setting
second two
21 = Year 21xx
Y
0
01 - 99 (i.e., 2001 - 2099)
Y
L
3. If E and Aux do not each have a wire connected, use a small
O
(
O/B
RC
R
piece of wire to connect them to each other.
2
4 24-hour clock (i.e., “15:30”)
digits)
4
. Push any excess wire back into the wall opening.
R
0
0
0
140* Month Setting
01 - 12 (i.e., January - December)
01 - 31
Labels don’t match?
150* Date Setting
If labels do not match letters on thermostat, see Alternate wiring
(heat pump system only)
MCR33552
170
Select System
Type
1
2
3
4
5
6
7
8
9
1
0
1
Heat/cool: Gas, oil or electric heating with central air conditioning.
Heat pump: Heat pump without backup or auxiliary heat.
Heat only: Gas, oil or electric heat without central air conditioning.
Alternate wiring (heat pump system only)
Heat only with fan: Gas, oil or electric heat without central air conditioning.
3
5
3
Hot water heat only (no fan): Gas, oil or hot water heat without central air conditioning.
Cool only: Central air conditioning only.
C
G
Y
Leave metal jumper in place, connecting R & Rc terminals.
If your old thermostat had both V and VR wires, stop now and contact a
Heat pump: Heat pump with backup or auxiliary heating.
qualified contractor for help.
Heat/Cool Multiple stages: 2 heat stages (wires on W and W2), 2 cooling stages (wires on Y and Y2).
Heat/Cool Multiple stages: 2 heat stages (wires on W and W2), 1 cooling stage (wire on Y).
Heat/Cool Multiple stages: 1 heat stage (wire on W), 2 cooling stages (wires on Y and Y2).
Gas or oil heat: Use this setting if you have a gas or oil heating system (system controls fan operation).
Electric heat: Use this setting if you have an electric heating system (thermostat controls fan operation).
O/B
RC
R
If your old thermostat had separate O and B wires, attach the B wire to
the C terminal. If another wire is attached to the C terminal, stop now
and contact a qualified contractor for help.
0
0
180 Heating Fan
2
6
Control
4
If your old thermostat had Y1, W1 and W2 wires, stop now and contact
AUX
E
0
190 Heat Pump
0
1
Cooling changeover valve: Use this setting if you connected a wire labeled “O” to the O/B terminal (see
a qualified contractor for help.
6
5
Changeover Valve
for heat pumps
only)
page 22).
If L terminal is used, C terminal wire must be connected (contact a
contractor if there is no C wire).
L
(
Heating changeover valve: Use this setting if you connected a wire labeled “B” to the O/B terminal (see
MCR32161
5
page 23).
0
240 Heating Cycle Rate 5 Gas or oil furnace: Standard gas/oil furnace (less than 90% efficiency).
If E and Aux terminals do not each have a wire connected, use a small
9
3
1
Electric furnace: Electric heating systems.
6
piece of wire to connect them to each other.
Hot water or high-efficiency furnace: Hot water system or gas furnace (more than 90% efficiency).
Gas/oil steam or gravity system: Steam or gravity heat systems.
0
270 Emergency Heat
Cycle Rate (heat
pumps only)
Settings 5, 9, 3, or 1 recommended. Other settings: 2, 4, 6, 7, 8, 10, 11, 12.
The number indicates how frequently the system cycles on and off to maintain the set temperature.
A higher number means the system is on and off for shorter amounts of time, a lower number means
longer on and off times. When these settings are set to match the system type, the thermostat controls
temperature more accurately.
Customer assistance
or call Honeywell Customer Care toll-free at 1-800-468-1502.
*
Functions set in Step 10.
6
9-2722—01