Honeywell Heat/1Cool User Guide - Page 67

Models Using Outdoor Reset

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Electromechanical Chronotherm® III HONEYWELL MODELS USING OUTDOOR RESET Electronic Replacement or Upgrade Chronotherm IV T841A1555 Y594R1763 Y594G1161 T8T681611R11G0100004 T8T481411R11R0120802 T8T5815111G1G0140721 T8T081011R11R0110406 T8T6816111G2G0220802 W890P0CB8190000/2 Function Existing Terminals Common ³· B B B B Power R R R R Compressor Y Y Y Y 1st Stage - Heat - - - Aux. Heat W W W W Fan G G G G Outdoor T Thermistor T T T Outdoor X2 X2 X2 X2 Thermostat Cooling O Changeover System F Monitor O ¶ F O ¶ F O ¶ F 2nd Stage - Compressor - - - 2nd Stage - Cool - - - ³ For best performance, use a NEMA standard transformer. · Terminal B (C) must be connected to transformer common. » Configure O/B (select models) in Installer Setup. ¿ Leave factory-installed jumper in place. C R Y1 or Y ¿ W1 W2 G ´ C C C R R R Y ¿ W1 Y1 ¿ W1 Y ¿ W1 W2 W2 W2 G G G ´ ´ ´ C C R R Y1 ¿ W1 Y1/W1 - ² W2 Aux. G G ´ ´ E O º L - E E » or O O O/B º ¶ L L - - E E » or O O O/B º ¶ L L - - E » O/B ¶ L ² W2 - - - - - Y2 ´ No connection. Tape off. ² When W2 is not used, configure W2 cycle rate to NC. ¶ LED is energized when terminal is powered. º L terminal is powered continuously when thermostat is in Em. Ht. position. M13189 TYPICAL THERMOSTATS AND SUBBASES - HONEYWELL MODEL NUMBER T874R1566/Q674L1538 T841A1068 T874R1053/Q674L1140 70-6627 • 65

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70-6627
•
65
HONEYWELL
MODELS USING OUTDOOR RESET
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER
T874R1566/Q674L1538
T841A1068
T874R1053/Q674L1140
Common
AB
Power
Compressor
1st Stage
Heat
Aux. Heat
Fan
Outdoor
Thermistor
Outdoor
Thermostat
Cooling
Changeover
System
Monitor
2nd Stage
Compressor
2nd Stage
Cool
T8011R1006
T8011R1014
Function
Existing
Terminals
T841A1555
Y594R1763
Y594G1161
T8611G1004
T8611R1000
T8411R1002
T8411R1028
PC8900/
W8900B1002
Electromechanical
Chronotherm
®
III
Electronic Replacement or Upgrade
A
For best performance, use a NEMA standard transformer.
B
Terminal B (C) must be connected to transformer common.
C
Configure O/B (select models) in Installer Setup.
D
Leave factory-installed jumper in place.
M13189
E
No connection. Tape off.
F
When W2 is not used, configure W2 cycle rate to NC.
G
LED is energized when terminal is powered.
H
L terminal is powered continuously when thermostat is in Em. Ht. position.
C
C
C
E
E
E
D
D
D
D
D
E
E
E
T8511G1021
T8511G1047
T8611G2002
T8611G2028
F
G
G
G
H
G
H
H
G
G
B
B
B
B
C
C
C
C
C
C
R
R
R
R
R
R
R
R
R
R
Y
Y
Y
Y
Y1
or
Y
Y
Y1
Y
Y1
Y1/W1
–
–
–
–
W1
W1
W1
W1
W1
–
W
W
W
W
W2
W2
W2
W2
W2
Aux.
G
G
G
G
G
G
G
G
G
G
T
T
T
T
X2
X2
X2
X2
E
E
E
E
E
E
O
O
O
O
O
O
O
or
O/B
O
O
or
O/B
O/B
F
F
F
F
L
L
L
L
L
L
–
–
–
–
–
–
–
–
–
W2
–
–
–
–
–
–
–
–
–
Y2
F
Chronotherm
IV