Table 1 — Thermostat Wiring Terminations
EXISTING WIRE
DESIGNATION
FUNCTION
TERMINAL
CONNECTION
GorF Fan G
Y1, Y, or C Cooling Y1
W1, W, or H Heating W1/O/B
Rh, R, M, Vr, or A Power (24 v) R
C Common C*
O/B Reversing Valve† W1/O/B
Y2 Second Stage Cooling Y2*
W2 Second Stage Heating W2*
*Terminals C, Y2, and W2 may not be used in all applications.
†Used on Heat Pump applications only.
Configure Advanced Setup — To enter into the ad-
vanced setup screens of the thermostat, press the Mode and
Override buttons at the same time for 5 seconds. The Ad-
vanced Setup Step number is shown in the top right corner
of the thermostat screen. Use the Mode button to advance
through the steps. See Table 2. Press the Mode and Override
buttons at the same time to exit the Advanced Setup mode.
NOTE: Refer to Set Clock section on page 2 for an expla-
nation of Advanced Setup Steps 1 and 2.
Table 2 — Advanced Setup Configuration
STEP DESCRIPTION RANGE DEFAULT
1* Time of Day 12:00 AM - 11:59 PM 12:00 AM
2* Day of the Week Sunday through Saturday Monday
3 Display Blanking Off/On Off
4 Fan Mode On/Auto Auto
5 Heat Pump Off/On Off
6
Reversing Valve
Polarity
O/B O
7 Electric Heat Off/On Off
8 Deadband 1 - 6 degrees 2
9
Forced Minimum
Temperature
Difference
0 - 6 degrees 2
10 Cycles per Hour d, d1,2-6 6
11
Thermoglow™
Backlight
Off/On On
12 Temperature Units F/C F
*Accessed and configured through the Set Clock Setup function.
DISPLAY BLANKING (Step 3) — When Display Blanking
is set to OFF, the thermostat will display the time of day,
current temperature, and mode normally. When Display Blank-
ing is set to ON, the thermostat will only display time of
day. The default is OFF.
FAN MODE (Step 4) — The fan mode is used to configure
fan operation. If On is selected, the fan will run continu-
ously during the Occupied schedule (except when Mode is
switched to OFF). The fan will be off during unoccupied sched-
ule except during heating or cooling operation.
If Auto is selected, the fan will operate only during heat-
ing or cooling operation. The default is Auto.
HEAT PUMP CONFIGURATION (Steps 5 and 6) — To set
the thermostat for heat pump operation, Advanced Setup Step
5 must be configured to ON. Use the UP and DOWN
ARROW buttons to configure the step. The default is OFF.
Press the Mode button to continue to Step 6. Step 6 is used
to set the reversing valve polarity for the heat pump. The
variable can be set to either ‘‘B’’or ‘‘O.’’ Set the reversing
valve polarity to the correct value depending on the appli-
cation. The default is ‘‘O.’’
NOTE: Step 6 will appear only if Step 5 is set to ON.
Step 7 will appear only if Step 5 is set to OFF.
W
TYPICAL
UNIT
L
C
G
Y1
E
O
W1
R
Y2
24 VAC COMMON
FAN RELAY
COMPRESSOR RELAY
1st STAGE HEAT
24 VAC
2nd STAGE HEAT CIRCUIT
W2
Y2
R
Y1
G
C
THERMOSTAT
W1
B
O
Fig.5—Typical Wiring (6-Wire, Single-Stage
Cooling, 2-Stage Heating Applications)
W2
TYPICAL
UNIT
L
C
G
Y1
E
O
W1
R
Y2
24 VAC COMMON
FAN RELAY
COMPRESSOR RELAY
1st STAGE HEAT*
24 VAC
2nd STAGE COMPRESSOR RELAY
2nd STAGE HEAT
W2
Y2
R
Y1
G
C
THERMOSTAT
W1
B
O
*If using electric heat, this option must be set to ON during advanced setup.
NOTE: Commercial heat pumps do not have the heat pump turned on in ad-
vanced setup.
Fig.6—Typical Wiring (7-Wire, 2-Stage Cooling,
2-Stage Heating Applications)
W2
TYPICAL
UNIT
L
C
G
Y1
E
O
W1
R
Y2
24 VAC COMMON
FAN RELAY
COMPRESSOR RELAY
24 VAC
W2
Y2
R
Y1
G
C
THERMOSTAT
REVERSING VALVE
W1
B
O
Fig.7—Typical Wiring (5-Wire, Single-Stage
Cooling, Single-Stage Heating,
Heat Pump Applications)
NOTE: If using residential heat pump, the heat
pump must be set to ON in advanced setup.
3
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