Mounting Thermostat - Honeywell T8501 Installation Instructions Manual

THERMOSTAT
O O C B O G
T T
2
OUTDOOR
TEMPERATURE
SENSOR
COMPRESSOR
CONTACTOR
COOL
CHANGEOVER
VALVE OR
DAMPER
HEAT
CHANGEOVER FAN
VALVE OR RELAY
DAMPER
1 POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
2 AVAILABLE ON SELECT MODELS.
Fig. 4. Typical hookup in heat and cool system with
one transformer.
THERMOSTAT
O O Rc O G Y
T T
2
OUTDOOR
TEMPERATURE
SENSOR
COMPRESSOR
CONTACTOR
FAN
RELAY
COOL
CHANGEOVER
VALVE OR
DAMPER
1
L1
(HOT)
L2
1
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
2 AVAILABLE ON SELECT MODELS.
3 JUMPER Rh TO Rc IN A SINGLE TRANSFORMER SYSTEM.
Fig. 5. Typical hookup in heat and cool system with
two transformers.
.
FOR WRAPAROUND
INSERTION STRIP
7/16 IN. (11 MM).
Y W R
HEATING
RELAY OR
VALVE COIL

Mounting Thermostat

1. Engage tabs at the top of the thermostat and wall-
2. Press lower edge of case to close and latch.
NOTE: To remove the thermostat from the wall, first pull
1
L1
(HOT)
L2
M4821
3
C B W Rh
HEAT
CHANGEOVER
VALVE OR
DAMPER
HEATING
RELAY OR
VALVE COIL
1
L1
(HOT)
L2
M4820
3
T8501 MICROELECTRONIC THERMOSTATS
FOR STRAIGHT INSERTION
STRIP 5/16 IN. (8 MM).
Fig. 6. Correct wiring technique.
plate. See Fig. 7.
out at the bottom of the thermostat; remove top
last.
A.
ENGAGE TABS AT TOP OF THERMOSTAT AND WALLPLATE.
B.
PRESS LOWER EDGE OF CASE TO LATCH.
Fig. 7. Mounting thermostat on wallplate.
M4826
M6798A
69-0925—4