Honeywell Heat/1Cool User Guide - Page 50

Existing, Terminals, AVAILABLE, PC8900

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ECONAR Electromechanical Chronotherm® III Electronic Replacement or Upgrade Chronotherm IV AVAILNAOBTLE Y594R1425 Y5Y9549G41G4174619 T8611R1000 T8T481411R11R0120802 T8T581511G11G0140721 T8T081011R11R0110406 T8T681611G12G0220802 W890P0CB8190000/2 Existing Function Terminals Common ³ X X X C C C C C C Power R Compressor Y 1st Stg. Heat W1 Aux. Heat W2 R Y · W1 W2 R Y1 · W1 W2 R Y1 · W1 W2 R Y · W1 W2 R Y1 · W1 W2 R Y · W1 W2 R Y1 · W1 W2 R ² Y1/W1 - ¿ Aux. NOT AVAILABLE Fan G C/O Valve B Heat System Monitor/ L System Defrost G G B B º º L X1 G B ¾ L G G or ¶ B B O/B ¾ º L L G G G ¶ or ¶ B B O/B O/B ¾ º º L L L EM. Heat E Multiple Aux. W3 Heat Loads » C/O Valve O Cool E E W3 W3 O O E E E E E E ´ ´ ´ ´ ´ ´ or ¶ ¶ or ¶ O O O O/B O O O/B O/B LED Indication - X2 X2 2nd Stage - Compressor - - ³ Terminal X (C) must be connected to transformer common. · Remove factory-installed Y1 (Y) to W1 jumper. » Terminal is for multiple second stage loads such as contactors, sequencers, or relays. ¿ When W2 is not used, configure W2 cycle rate to NC. - - - - X1 X2 - ¿ - - - - - W2 ´ If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B) terminal. ² Install R8222D1014 (see page 12) for separate Y1 and W1 terminals. ¶ Configure O/B (select models) in Installer Setup. º LED is energized when terminal is powered. ¾ L terminal is powered continuously when thermostat is in Em. Ht. position. M13153 70-6627 • 48 TYPICAL THERMOSTATS AND SUBBASES - HONEYWELL MODEL NUMBER T874G1915/Q674F1410

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70-6627
•
48
ECONAR
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER
T874G1915/Q674F1410
T8011R1006
T8011R1014
Function
Existing
Terminals
NOT
AVAILABLE
T8611R1000
T8411R1002
T8411R1028
PC8900/
W8900B1002
Electromechanical
Chronotherm
®
III
Electronic Replacement or Upgrade
Common
A
Power
Compressor
1st Stg. Heat
Aux. Heat
Fan
C/O Valve
Heat
System Monitor/
System Defrost
EM. Heat
Multiple Aux.
Heat Loads
C
C/O Valve
Cool
LED
Indication
2nd Stage
Compressor
M13153
G
B
G
D
E
F
G
G
G
G
A
Terminal X (C) must be connected to transformer common.
B
Remove factory-installed Y1 (Y) to W1 jumper.
C
Terminal is for multiple second stage loads such as contactors, sequencers,
or relays.
D
When W2 is not used, configure W2 cycle rate to NC.
E
If multiple auxiliary heat loads are used, connect to W2 (Aux W8900B)
terminal.
F
Install R8222D1014 (see page 12) for separate Y1 and W1 terminals.
G
Configure O/B (select models) in Installer Setup.
H
LED is energized when terminal is powered.
I
L terminal is powered continuously when thermostat is in Em. Ht. position.
B
B
B
B
B
B
E
E
E
E
E
T8511G1021
T8511G1047
T8611G2002
T8611G2028
D
H
I
H
I
H
H
H
I
X
X
X
C
C
C
C
C
C
R
R
R
R
R
R
R
R
R
Y
Y
Y1
Y1
Y
Y1
Y
Y1
Y1/W1
W1
W1
W1
W1
W1
W1
W1
W1
–
W2
W2
W2
W2
W2
W2
W2
W2
Aux.
G
G
G
G
G
G
G
G
G
B
B
B
B
B
B
or
O/B
B
B
or
O/B
O/B
L
L
X1
L
L
L
L
L
L
E
E
E
E
E
E
E
E
E
W3
W3
W3
O
O
O
O
O
O
or
O/B
O
O
or
O/B
O/B
–
X2
X2
–
–
–
–
X1
X2
–
–
–
–
–
–
–
–
–
W2
Chronotherm
IV
NOT AVAILABLE
Y594R1425
Y594G1419
Y594G1476