Owner's Manual
Page 3
...and manufacturer, and number of wires connected to the thermostat. Before you call Honeywell Customer Assistance toll free at 1-800-468-1502, Monday-Friday, 7:00 a.m. - 5:30 p.m. for example, 9346. 3 Step 2 Expose the wiring on your existing thermostat (the subbase) and check that the terminals on the...the installation instructions provided with the terminals shown in the Table of Contents, and turn to control your heat pump. HOW TO USE THIS GUIDE Before you disconnect the wires and remove your existing thermostat, be sure you can safely use this new thermostat, see the CT70 wiring ...
...and manufacturer, and number of wires connected to the thermostat. Before you call Honeywell Customer Assistance toll free at 1-800-468-1502, Monday-Friday, 7:00 a.m. - 5:30 p.m. for example, 9346. 3 Step 2 Expose the wiring on your existing thermostat (the subbase) and check that the terminals on the...the installation instructions provided with the terminals shown in the Table of Contents, and turn to control your heat pump. HOW TO USE THIS GUIDE Before you disconnect the wires and remove your existing thermostat, be sure you can safely use this new thermostat, see the CT70 wiring ...
Owner's Manual
Page 11
Jumper these two terminals if both are present # This terminal must be connected to transformer common. $ Remove this factory-installed jumper for independent stage 1 heat and cool connection. 11 HEAT SYSTEM MONITOR Existing thermostat wiring X1 or C 1 R or RC or RH Y or Y1 W1 W2 G B or W O E AMANA New thermostat wiring 2 X R Y1 3 W1 W2 G B O E L ! HEAT FAN C/O VALVE HEAT C/O VALVE COOL EM. HEAT AUX. Wiring terminal function COMMON POWER COMPRESSOR 1ST STG.
Jumper these two terminals if both are present # This terminal must be connected to transformer common. $ Remove this factory-installed jumper for independent stage 1 heat and cool connection. 11 HEAT SYSTEM MONITOR Existing thermostat wiring X1 or C 1 R or RC or RH Y or Y1 W1 W2 G B or W O E AMANA New thermostat wiring 2 X R Y1 3 W1 W2 G B O E L ! HEAT FAN C/O VALVE HEAT C/O VALVE COOL EM. HEAT AUX. Wiring terminal function COMMON POWER COMPRESSOR 1ST STG.
Owner's Manual
Page 12
HEAT LOADS 3 W3 New thermostat wiring 1 X R Y1 2 W1 W2 G B O L E 3 ! BARD/JANITROL/TAPPAN/WILLIAMSON Wiring terminal function COMMON Existing thermostat wiring 1 C or X1 or X POWER RH or RC or R COMPRESSOR Y 1ST STG. HEAT E MULTIPLE AUX. This terminal must be connected to transformer common. # Leave factory-installed jumper in place. $ Connect multiple second stage heating loads to W2 terminals. % Thermostat is connected to either O or B terminal, but not both. 12 HEAT W2 FAN G C/O VALVE HEAT 4 B or W1 C/O VALVE COOL 4O SYSTEM MONITOR L EM. HEAT AUX.
HEAT LOADS 3 W3 New thermostat wiring 1 X R Y1 2 W1 W2 G B O L E 3 ! BARD/JANITROL/TAPPAN/WILLIAMSON Wiring terminal function COMMON Existing thermostat wiring 1 C or X1 or X POWER RH or RC or R COMPRESSOR Y 1ST STG. HEAT E MULTIPLE AUX. This terminal must be connected to transformer common. # Leave factory-installed jumper in place. $ Connect multiple second stage heating loads to W2 terminals. % Thermostat is connected to either O or B terminal, but not both. 12 HEAT W2 FAN G C/O VALVE HEAT 4 B or W1 C/O VALVE COOL 4O SYSTEM MONITOR L EM. HEAT AUX.
Owner's Manual
Page 13
HEAT Existing thermostat wiring 1 X,X1 or C R Y W2 or W1 G O L or X E New thermostat wiring 1 X R Y1 2 W1 W2 G B O L E ! HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. ARCOAIRE/SNYDER GENERAL/COMFORTMAKER Wiring terminal function COMMON POWER COMPRESSOR 1ST STG. This terminal must be connected to transformer common. # Leave factory-installed jumper in place. 13 HEAT AUX.
HEAT Existing thermostat wiring 1 X,X1 or C R Y W2 or W1 G O L or X E New thermostat wiring 1 X R Y1 2 W1 W2 G B O L E ! HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. ARCOAIRE/SNYDER GENERAL/COMFORTMAKER Wiring terminal function COMMON POWER COMPRESSOR 1ST STG. This terminal must be connected to transformer common. # Leave factory-installed jumper in place. 13 HEAT AUX.
Owner's Manual
Page 14
HEAT AUX. This terminal must be connected to transformer common. # Leave factory-installed jumper in place. $ Connect multiple second stage heating loads to W2 terminals. 14 HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. HEAT LOADS 3 DEFROST Existing thermostat wiring C1 or X1 or C 1 R W1 or Y W2 G B Y1 or O L or F X or E W3 P New thermostat wiring 1 X R Y1 2 W1 W2 G B 3 O L E P ! HEAT MULTIPLE AUX. B.D.P. (BRYANT-DAY/NIGHT-PAYNE) Wiring terminal function COMMON POWER COMPRESSOR 1ST STG.
HEAT AUX. This terminal must be connected to transformer common. # Leave factory-installed jumper in place. $ Connect multiple second stage heating loads to W2 terminals. 14 HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. HEAT LOADS 3 DEFROST Existing thermostat wiring C1 or X1 or C 1 R W1 or Y W2 G B Y1 or O L or F X or E W3 P New thermostat wiring 1 X R Y1 2 W1 W2 G B 3 O L E P ! HEAT MULTIPLE AUX. B.D.P. (BRYANT-DAY/NIGHT-PAYNE) Wiring terminal function COMMON POWER COMPRESSOR 1ST STG.
Owner's Manual
Page 15
HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. HEAT Existing thermostat wiring 1 C R Y W1 or W2 G O F or L E CARRIER New thermostat wiring 1 X R Y1 2 W1 W2 G B O L E ! This terminal must be connected to transformer common. # Leave factory-installed jumper in place. 15 HEAT AUX. Wiring terminal function COMMON POWER COMPRESSOR 1ST STG.
HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. HEAT Existing thermostat wiring 1 C R Y W1 or W2 G O F or L E CARRIER New thermostat wiring 1 X R Y1 2 W1 W2 G B O L E ! This terminal must be connected to transformer common. # Leave factory-installed jumper in place. 15 HEAT AUX. Wiring terminal function COMMON POWER COMPRESSOR 1ST STG.
Owner's Manual
Page 16
FRIEDRICH Wiring terminal function COMMON POWER COMPRESSOR 1ST STG. Jumper is not required on this thermostat (CT70). 16 HEAT Existing thermostat wiring 1 X or C or X1 RH or RC Y2 or Y W1 W2 G B O or Y1 L E or X2 W3 or U 3 New thermostat wiring 1 X R Y1 2 W1 W2 G B O L E ! This terminal must be connected to transformer common. # Leave factory-installed jumper in place. $ Tape off the end of the wire. HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. HEAT AUX.
FRIEDRICH Wiring terminal function COMMON POWER COMPRESSOR 1ST STG. Jumper is not required on this thermostat (CT70). 16 HEAT Existing thermostat wiring 1 X or C or X1 RH or RC Y2 or Y W1 W2 G B O or Y1 L E or X2 W3 or U 3 New thermostat wiring 1 X R Y1 2 W1 W2 G B O L E ! This terminal must be connected to transformer common. # Leave factory-installed jumper in place. $ Tape off the end of the wire. HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. HEAT AUX.
Owner's Manual
Page 17
This terminal must be connected to transformer common. # Leave factory-installed jumper in place. 17 HEAT AUX. HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. HEAT Existing thermostat wiring C or B R Y W G B O X New thermostat wiring 1 X R Y1 2 W1 W2 G B O L E ! HEIL QUAKER/WHIRLPOOL/TEMPSTAR Wiring terminal function COMMON POWER COMPRESSOR 1ST STG.
This terminal must be connected to transformer common. # Leave factory-installed jumper in place. 17 HEAT AUX. HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. HEAT Existing thermostat wiring C or B R Y W G B O X New thermostat wiring 1 X R Y1 2 W1 W2 G B O L E ! HEIL QUAKER/WHIRLPOOL/TEMPSTAR Wiring terminal function COMMON POWER COMPRESSOR 1ST STG.
Owner's Manual
Page 18
LENNOX Wiring terminal function COMMON POWER 1ST STG. COOL 2ND STG. HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. HEAT Existing thermostat wiring Y or X BL or V/VR R or M O or Y Y or F BK or R E New thermostat wiring 1 X R W1 Y1 2 W2 G B O L E ! HEAT (COMP) 1ST STG. This terminal must be connected to transformer common. # Leave factory-installed jumper in place. 18
LENNOX Wiring terminal function COMMON POWER 1ST STG. COOL 2ND STG. HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. HEAT Existing thermostat wiring Y or X BL or V/VR R or M O or Y Y or F BK or R E New thermostat wiring 1 X R W1 Y1 2 W2 G B O L E ! HEAT (COMP) 1ST STG. This terminal must be connected to transformer common. # Leave factory-installed jumper in place. 18
Owner's Manual
Page 19
This terminal must be connected to transformer common. # Leave factory-installed jumper in place. 19 HEAT AUX. HEAT Existing thermostat wiring 1 X R Y W2 G B O L E RHEEM/RUUD New thermostat wiring 1 X R Y1 2 W1 W2 G B O L E ! HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. Wiring terminal function COMMON POWER COMPRESSOR 1ST STG.
This terminal must be connected to transformer common. # Leave factory-installed jumper in place. 19 HEAT AUX. HEAT Existing thermostat wiring 1 X R Y W2 G B O L E RHEEM/RUUD New thermostat wiring 1 X R Y1 2 W1 W2 G B O L E ! HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. Wiring terminal function COMMON POWER COMPRESSOR 1ST STG.
Owner's Manual
Page 20
TRANE/AMERICAN STANDARD Wiring terminal function COMMON POWER 1ST STG. CT70 replaces outdoor reset with improved zero droop performance. 20 This terminal must be connected to transformer common. # Leave factory-installed jumper in place. $ Tape off end. HEAT AUX. HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR OUTDOOR SENSOR OUTDOOR STAT Existing thermostat wiring 1 B R Y W1 or W G O F or L T W2 or X2 New thermostat wiring 1 X R W1 2 Y1 W2 G B O L 3 E !
TRANE/AMERICAN STANDARD Wiring terminal function COMMON POWER 1ST STG. CT70 replaces outdoor reset with improved zero droop performance. 20 This terminal must be connected to transformer common. # Leave factory-installed jumper in place. $ Tape off end. HEAT AUX. HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR OUTDOOR SENSOR OUTDOOR STAT Existing thermostat wiring 1 B R Y W1 or W G O F or L T W2 or X2 New thermostat wiring 1 X R W1 2 Y1 W2 G B O L 3 E !
Owner's Manual
Page 21
HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. HEAT LOADS Existing thermostat wiring X or B R Y W or W2 G H O 4 X or L 4 E 4 W3 New thermostat wiring 1 X R Y1 3 W1 W2 G B O L E 2 ! HEAT AUX. This terminal must be connected to transformer common. # Connect multiple second stage heating loads to W2 terminals. $ Leave factory-installed jumper in place. % If present on original equipment. 21 HEAT MULTIPLE AUX. YORK/BORG WARNER/LUXAIRE (MONCRIEF, FRASER-JOHNSTON) Wiring terminal function COMMON POWER COMPRESSOR 1ST STG.
HEAT FAN C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. HEAT LOADS Existing thermostat wiring X or B R Y W or W2 G H O 4 X or L 4 E 4 W3 New thermostat wiring 1 X R Y1 3 W1 W2 G B O L E 2 ! HEAT AUX. This terminal must be connected to transformer common. # Connect multiple second stage heating loads to W2 terminals. $ Leave factory-installed jumper in place. % If present on original equipment. 21 HEAT MULTIPLE AUX. YORK/BORG WARNER/LUXAIRE (MONCRIEF, FRASER-JOHNSTON) Wiring terminal function COMMON POWER COMPRESSOR 1ST STG.
Owner's Manual
Page 22
HEAT AUX. HEAT FAN 1ST STG. COOL C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. HEAT Existing thermostat wiring B or X2 R W1 W2 G Y1 E New thermostat wiring 1 X R W1 W2 G 2 Y1 B O L E ! This terminal must be connected to transformer common. # Remove factory-installed jumper. 22 YORK/BORG WARNER Wiring terminal function COMMON POWER 1ST STG.
HEAT AUX. HEAT FAN 1ST STG. COOL C/O VALVE HEAT C/O VALVE COOL SYSTEM MONITOR EM. HEAT Existing thermostat wiring B or X2 R W1 W2 G Y1 E New thermostat wiring 1 X R W1 W2 G 2 Y1 B O L E ! This terminal must be connected to transformer common. # Remove factory-installed jumper. 22 YORK/BORG WARNER Wiring terminal function COMMON POWER 1ST STG.