Honeywell Heat/1Cool - T841A1563 Premier 2 Stage Thermostat User Manual page 24

HEAT PUMP THERMOSTAT CROSS REFERENCE/SELECTION GUIDE
THERMO-
STAT
LOGIC
CIRCUIT
S1 S1
S2 S2
S3 S3
6 200905 REMOTE
SENSOR
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
POSSIBLE CHECK LED CIRCUITS:
2
CHECK
LED
(YELLOW)
SWITCH TO R (POWER) SIDE
OF SYSTEM TRANSFORMER
3 SOME OLDER HEAT PUMP THERMOSTATS USE X FOR COMMON TERMINAL.
4
NOMINAL 24 VAC POWER MUST BE PRESENT BETWEEN R AND C TERMINALS FOR THERMOSTAT OPERATIONS.
5 AVAILABLE ONLY ON MODLES WITH SEPARATE SENSOR FOR REMOTE TEMPERATURE SENSING.
6 RECOMMENDED INTERCONNECT CABLE: 18-GAUGE THERMOSTAT CABLE, 200 FT. (61 M) MAXIMUM LENGTH.
ROUTE INTERCONNECT CABLE AWAY FROM SOURCES OF ELECTRICAL NOISE.
70-6627 • 22
POWER
SUPPLY
FAN
SWITCH
ON
SUBBASE
AUTO
LOGIC/
CONTROL
CIRCUIT
HEAT 1
HIGH
LIMIT
5
X1 TO R
FAULT DETECTION
CHECK
SWITCH
LED
(YELLOW)
TO C
X2
SWITCH TO C (COMMON) SIDE
OF SYSTEM TRANSFORMER
Fig. 27. Typical wiring diagram for T8611M7008.
4
HIGH
LIMIT
AUX. HT.
LED (GREEN)
EM. HT.
LED
(RED)
HEAT 3
HEAT 2
SYSTEM
SWITCH
EM. HT.
C. O.
HEAT
OFF
C. O.
AUTO
COOL
COOL 1
COOL 2
CHECK
LED
(YELLOW)
X1 TO R
CHECK
LED
FAULT DETECTION
(YELLOW)
SWITCH
TO C
X2
SWITCH IN SECONDARY OF
SEPARATE TRANSFORMER
R
3
C
L
AUX. HT.
MONITOR
RELAY
W3
STAGE 2
RELAY
W2
EM. HT. RELAY
E
FAN RELAY
G
COOL CHANGEOVER
VALVE
O
HEAT CHANGEOVER
VALVE
B
STAGE 1 COMPRESSOR
CONTACTOR
Y
STAGE 2 COMPRESSOR
CONTACTOR
Y2
X1
2
X2
X1
L1
SWITCHING
(HOT)
DEVICE
L2
24 VAC
X2
L1
(HOT)
L2
1
M2656