Filter
Top Products
3
Single
Stage
(SS)
Energized
in Cool
Mode
Energized
in Heat,
Off Mode
System
O
RH
+
B
CLASS II
TRANSFORMER
HOT
24VAC
NEUTRAL
120VAC
W
G
C*
-
Energized
on call
for Cool
(Com-
pressor)
Blower/
Circula-
tor Fan
Energiz-
ed on
call for
Heat or
Cool
(if ELE
is sel-
ected)
24 Volt
(Hot)
Cool
DC
supply
voltage
to re-
mote
Tem p-
erature
Sensor
Remote
Tem p-
erature
Sensor
signal
DC
Return
to
Remote
Tem p-
erature
Sensor
Energized
on call for
Heat
Third wire
for 3-wire
zone valve
Y
RC
S
6
L
{
To Remote Temperature Sensor
24 Volt
(Hot)
Heat
24 Volt
Com-
mon
(option-
al)
CLASS II
TRANSFORMER
120VAC
HOT
24VAC
NEUTRAL
HEATING
COOLING
Diagnostic
Indicator
(See
Note
)
1
Jumper
Remove Jumper Wire
between RH & RC
Single
Stage
(SS)
Energiz-
ed in
Cool
Mode
Energized
in Heat
or Off
Mode
System
O
RH
+
B
CLASS II
TRANSFORMER
HOT
24VAC
NEUTRAL
120VAC
W
G
C*
-
Jumper
Energized
on call
for Cool
(Com-
pressor)
Blower/
Circula-
tor Fan
Energiz-
ed on
call for
Cool &
for Heat
(if ELE
is sel-
ected)
24 Volt
(Hot)
Cool
DC
supply
voltage
to re-
mote
Tem p-
erature
Sensor
Remote
Tem p-
erature
Sensor
signal
DC
Return
to
Remote
Tem p-
erature
Sensor
Energized
on call for
Heat
Third
wire for
3-wire
zone
valve
Diagnostic
Indicator
(See
Note
)
Y
RC
S
6
L
{
To Remote Temperature Sensor
24 Volt
(Hot)
Heat
24 Volt
Com-
mon
(option-
al)
1
Single Stage ConnectionsSingle Stage Connections
Single Stage ConnectionsSingle Stage Connections
Single Stage Connections
Refer to equipment manufacturers' instructions for specific system
wiring information.
This thermostat is designed to operate a single-transformer or two-
transformer system.
You can configure the thermostat for use with the following systems:
SINGLE STSINGLE ST
SINGLE STSINGLE ST
SINGLE ST
AA
AA
A
GEGE
GEGE
GE gas, oil or electric.
After wiring, see INSTALLER CONFIGURATION section for proper
thermostat configuration.
Single Stage System with Single TransformerSingle Stage System with Single Transformer
Single Stage System with Single TransformerSingle Stage System with Single Transformer
Single Stage System with Single Transformer
Single Stage with Two TransformersSingle Stage with Two Transformers
Single Stage with Two TransformersSingle Stage with Two Transformers
Single Stage with Two Transformers
* Common connection
required for fault or
malfunction indication
and remote sensor.
NONO
NONO
NO
TETE
TETE
TE: If continuous backlight or hardwired
power input are desired but do not function
in both HEAT and COOL modes, cut the
heating transformer 24V wires and tape off.
Connect the neutral circuit disconnected
from the heating transformer to the neutral
circuit of the cooling transformer. Disconnect
the wire to the RH terminal and install a
jumper between RH and RC. Depending on
the system requirements, replace the
cooling transformer with a 75VA class II
transformer if needed.
WIRING CONNECTIONSWIRING CONNECTIONS
WIRING CONNECTIONSWIRING CONNECTIONS
WIRING CONNECTIONS
* Common connection
required for fault or
malfunction indication
and remote sensor.
NONO
NONO
NO
TE TE
TE TE
TE ➀: Connection for Call for Service diagnostic indicator compatible with mechanical or electronic condenser control with Comfort Alert
TM
.