Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 115

Existing
Function
Terminals
Common
B
Power
R
or
Compressor
Y Y1
1st Stage
W1
Heat
or
Auxiliary
W W2
Heat
Fan
G
C/O Valve
H
Heat
C/O Valve
O
Cool
System Monitor/
X
System Defrost
or
EM. Heat
E X
Multiple Aux.
–
Heat Loads
LED Indication X
T
2nd Stage
–
Compressor
2nd Stage
–
Cool
Configure O/B (select models) in Installer Setup.
When W2 is not used, configure W2 cycle rate to NC.
Terminal is for multiple auxiliary heat loads such as contactors, sequencers,
or relays.
LED is energized when terminal is powered.
L terminal is powered continuously in Em. Ht. position.
Tape off. Not used.
Field-installed E to W2 jumper for improved performance in emergency heat.
TYPICAL THERMOSTATS AND SUBBASES — HONEYWELL MODEL NUMBER (CUSTOMER PART NUMBER)
T841A1274 (2TH11703324)
T872G1299/Q672L1177 1
T872R1032/Q672L1011 1
T874G1170/Q674J1027 (2TH11702424)
T874G1196/Q674J1027
B2CH, B2PS, EICS, EIEB, EIHB, E2CH (ALTERNATE REPLACEMENTS)
Electromechanical
X X X
R R R
Y Y Y1
– W1 W1
W2 W2 W2
G G G
B B B
O O O
L X1
E E E
W3 W3 W3
– X2 X2
– – –
– – –
T874G1345 (2TH11702624)1
T874G1402/Q674L1363 (2TH11702824)
T874G1428/Q674J1027 (6TH11702424)1
T874R1046/Q674L1017 (2TH11702224)1
T874R1046/Q674L1272 (2TH11702224)1
Electronic Replacement or Upgrade
®
Chronotherm
III
C C
R R
or
Y1 Y Y
W1 W1
W2 W2
G G
B B
O O
L L
E E
– –
X1 X2 –
– –
– –
Terminal must be connected to the transformer common.
Do not remove factory-installed jumper.
Optional Check LED on T8611G1004. See Fig. 26.
Field-installed X2 to X (C) jumper.
H terminal is not available on all models.
Using these thermostats with a W8045 Demand Defrost Control may cause
customer complaints. If replacing a thermostat used on a W8045, see
York/Borg Warner Direct Replacements.
YORK/BORG WARNER
Chronotherm
IV
C C C
R R R
Y1 Y Y1
W1 W1 W1
W2 W2 W2
G G G
or or
B O/B B B
or or
O O/B O O
L L L
E E E
– – –
– – X1 X2
– – –
– – –
T8141A1006
T8300A1037/Q6300A1044 (2ET11700124A)
T8300A1144/Q6300A1044 (6ET11700124A)
T8611R1018 (025-27655)
70-6627 • 113
C
R
Y1/W1
–
Aux.
G
O/B O/B
O/B O/B
L
E
–
–
W2
Y2
M13224