Table 1 — Thermostat Wiring Terminations
EXISTING WIRE
DESIGNATION
FUNCTION
TERMINAL
CONNECTION
G or F
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.
III. SET CLOCK
The Mode and Override buttons are used to change the time
and day displayed on the thermostat. Press and hold the Mode
and Override buttons for 2 seconds to enter the setup screens.
The current time will blink on and off. Press the UP ARROW
and DOWN ARROW buttons until the correct time is shown.
Hold down the buttons to quickly move through the time dis-
play. The AM and PM annunciators will automatically change.
Hold down the Override button while pressing UP ARROW
or DOWN ARROW to change the time by hours instead of
minutes. To ensure the schedules are properly followed, make
sure that AM or PM is correct for the time chosen. When the
correct time is shown, press the Mode button to modify the
day of the week. The current day will blink on and off. Press
the UP ARROW and DOWN ARROW buttons until the cor-
rect day is shown. Press the Mode and Override buttons again
to exit the Set Clock mode.
IV. HEAT PUMP CONFIGURATION
To configure the thermostat for heat pump operation, Ad-
vanced Setup Steps 5 (Heat Pump Operation) and 6 (Revers-
ing Valve Polarity) must be configured correctly. See the
Configure Advanced Setup section for information on config-
uring these options.
NOTE:
Some large commercial rooftop heat pump units must
be configured with Advanced Setup Step 5 (Heat Pump Op-
eration) set to OFF. Refer to the base unit instructions for
more information.
V. CONFIGURE ADVANCED SETUP
To enter the advanced setup screens of the thermostat, press
the Mode and Override buttons at the same time for 5 sec-
onds. The Advanced 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 this page for an expla-
nation of Advanced Setup Steps 1 and 2.
A. Display Blanking (Step 3)
When Display Blanking is set to OFF, the thermostat will
display the time of day, current temperature, and mode nor-
mally. When Display Blanking is set to ON, the thermostat
will only display time of day. The default is OFF.
B. Fan Mode (Step 4)
The fan mode is used to configure fan operation. If On is se-
lected, the fan will run continuously during the Occupied sched-
ule (except when Mode is switched to OFF). The fan will be
off during unoccupied schedule except during heating or cool-
ing operation.
If Auto is selected, the fan will operate only during heating
or cooling operation. The default is Auto.
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.
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.
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