69-0927—4
3
T8511G,R MICROELECTRONIC HEAT PUMP THERMOSTATS
Fig. 3. Typical hookup in heat pump application.
Fig. 4. Typical hookup in heat pump system
with emergency heat relay.
Fig. 5. Typical hookup in heat pump application with
emergency heat relay and O/B terminal.
Fig. 6. Proper wiring technique.
Mounting Thermostat
1. Engage tabs at the top of the thermostat and
wallplate. See Fig. 7.
2. Press lower edge of case to close and latch.
M4826
FOR WRAPAROUND
INSERTION STRIP
7/16 IN. (11 MM).
FOR STRAIGHT
INSERTION STRIP
5/16 IN. (8 MM).
L1
(HOT)
L2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
AVAILABLE ON SELECT MODELS.
1
AUX. HEAT
RELAY
M4828
COMPRESSOR
CONTACTOR
FAN
RELAY
R
O
T
O
T
O
G
Y
C
E
L
OUTDOOR
TEMPERATURE
SENSOR
COOL
CHANGEOVER
VALVE
EM. HEAT
RELAY
THERMOSTAT
1
2
2
W2
EQUIPMENT
MONITOR
L1
(HOT)
L2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
AVAILABLE ON SELECT MODELS.
1
M4829
COMPRESSOR
CONTACTOR
FAN
RELAY
R
O
T
O
T
O
G
Y
C
L
OUTDOOR
TEMPERATURE
SENSOR
COOL
CHANGEOVER
VALVE
THERMOSTAT
1
2
2
B
HEAT
CHANGEOVER
VALVE
EQUIPMENT
MONITOR
L1
(HOT)
L2
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND
OVERLOAD PROTECTION AS REQUIRED.
AVAILABLE ON SELECT MODELS.
1
HEAT
RELAY 2
M4830
COMPRESSOR
CONTACTOR
FAN
RELAY
R
O
T
O
T
O/B
G
Y1
C
E
W2
OUTDOOR
TEMPERATURE
SENSOR
COOL/HEAT
CHANGEOVER
VALVE
EM. HEAT
RELAY
THERMOSTAT
1
2
2
W1
L
HEAT
RELAY 1
EQUIPMENT
MONITOR
