Honeywell T8411R Manual page 5

THERMISTOR
SENSOR
THERMOSTAT
LOGIC
POWER
SUPPLY
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD PROTECTION AS REQUIRED.
1
2
REMOVE JUMPER, WHEN SUPPLIED, FOR SYSTEMS WITH SEPARATE HEATING COMPRESSOR CONTACTOR (W1 SEPARATE FROM Y).
3 NOT ALL MODELS HAVE BOTH O AND B TERMINALS.
Fig. 6. T8411R two-stage heat, one-stage cool wiring diagram with manual changeover.
A
ENGAGE TABS AT TOP OF THERMOSTAT
WITH SLOTS ON MOUNTING PLATE.
STAGE 2 RELAY
SYSTEM
SWITCH
EM. HT.
HEAT
OFF
COOL
STAGE 1 RELAY
FAN SWITCH
ON
AUTO
DASHED LINES INDICATE TABS
ON BACK OF THERMOSTAT
Fig. 7. Mounting thermostat to wallplate.
5
T8411R ELECTRONIC HEAT PUMP THERMOSTAT
R
AUXILARY
HEAT RELAY
W2
L
CHANGEOVER
VALVE HEAT
B
3
O
COMPRESSOR
CONTACTOR
Y
2
W1
EMERGENCY
HEAT RELAY
E
G
C
B
PRESS LOWER EDGE OF
CASE TO LATCH.
L1
(HOT)
L2
1
RELAY
CHANGEOVER
VALVE COOL
COMPRESSOR
CONTACTOR
HEAT
FAN RELAY
M11333A
M18577
68-0185—2