Page 1
LX Series
LX Series
Digital Thermostat
Digital Thermostat
BACKLIT DISPLAY
S1-THSU21P1
Model
S1-THSU32P7
S1-THSU32HP7
RESIDENTIAL
Owner’s Manual
Owner’s Manual
and
and
Installation Instructions
Installation Instructions
Page 2
Page 3
CAUTION
Follow the Installation Instructions before proceeding.
Set the thermostat mode to “OFF” prior to changing
settings in setup or restoring Factory Defaults.
NOTE: Due to variations in environmental conditions, it is not
always possible to achieve the desired humidification or
dehumidification setpoint.
This device complies with Part 15 of the FCC Rules. Operation is
subject to the following two conditions: (1) this device may not cause
harmful interference, and (2) this device must accept any interference
received, including interference that may cause undesired operation.
Thermostat LX
Tested to Comply
c
with FCC Standards
C
F
4Z95
FOR HOME OR OFFICE USE
Page i
Page 4
Page 5
Glossary of Terms
Auto-Changeover: A mode in which the thermostat will turn on the
heating or cooling based on room temperature demand.
Cool Setpoint: The warmest temperature that the space should rise
to before cooling is turned on (without regard to deadband).
Deadband: The number of degrees the thermostat will wait, once a
setpoint has been reached, before energizing heating or cooling.
Dehumidify: To reduce the amount of moisture in the air.
Differential: The forced temperature difference between the heat set-
point and the cool setpoint.
Heat Setpoint: The coolest temperature that the space should drop
to before heating is turned on (without regard to deadband).
Humidify: To increase the amount of moisture in the air.
Icon: The word or symbol that appears on the thermostat display.
Mode: The current operating condition of the thermostat (i.e. Off,
Heat, Cool, Auto, Program On).
Non-Programmable Thermostat: A thermostat that does not have
the capability of running Time Period Programming.
Programmable Thermostat: A thermostat that has the capability of
running Time Period Programming.
Reheat: Running the cooling and 2nd stage strip heaters at the same
time in order to dehumidify the air without cooling down the room
temperature.
Temperature Swing: Same as Deadband.
Time Period Programming: A program that allows the thermostat to
automatically adjust the heat setpoint and/or the cool setpoint based
on the time of the day.
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Page 6
Page 7
Table of Contents
Get to Know Your Thermostat
Quick Start
INSTALLATION INSTRUCTIONS
Sample Wiring Diagrams
Test Operation
USER SETUP
Backlight Operation
Scrolling Display Options
Thermostat Display Options
Programming Vacation Mode
Emergency Heat
System Runtimes
Time Period Programming
INSTALLER SETUP
Program Mode Operation
Timers and Deadbands
Programming Fan Operation
Comfort Recovery Operation
Humidification & Dehumidification
Dual Fuel Operation
Remote Sensor Operation
Auxiliary Output
Dry Contact Operation
Factory Defaults
TECHNICIAN SETUP
Sensor Calibration
Equipment Testing
Advanced Output Testing
Advanced Setup Table
Troubleshooting
INDEX
Page iii
1
5
7
11
14
15
16
16
17
17
18
20
21
23
24
24
25
26
27
28
30
31
33
33
33
34
37
38
Page 8
Page 9
Get to Know Your Thermostat
Backlit LCD Display
Cooler
Button
Emergency
Heat
Set
Clock
Front Panel
Scrolling Display
Heat or Cool
Demand Indicator
Red = Heat, Green = Cool
Mode
Button
Vacation Accessory
(
RESET FILTER
on some models
Warmer
Button
PROGRAM
OFF RUN
HOLD TO SET
(
Page 1
Humidity*
(This feature not available on all models)
Fan
Outdoor Temp.
Program
Off | Run
Hold To Set
Setup
Display
Options
Page 10
Get to Know Your Thermostat
Display Features
Program ONOFF
2nd3rd
Am
Pm
18:88
Setup Step
Day Night
Morning
Evening
Fan On
6
The scrolling display will be used to help you easily navigate the setup
screens in the thermostat.
Clock with Day of the Week
Indicates the current time and day. This clock is also used to
program the time period schedules.
Mode Indicators
Selects the operational mode of the equipment.
HEAT - Indicates the heating mode.
COOL - Indicates the air conditioning mode.
HEAT & COOL - Indicates the system will automatically change over between heat and cool modes as the temperature varies.
OFF - Indicates heating and cooling is turned off.
Program icon
Indicates that Time Period Programming is running or is enabled
to be set.
Room Temperature Display
Indicates the current room temperature and displays the outdoor
temperature when selected.
Outdoor icon
6
Indicates the temperature displayed is from the optional outdoor
sensor.
188
Stage
Outdoor
188
Page 2
188
COOL SET
A HEAT ETUX S
88
H
Lo
Page 11
Get to Know Your Thermostat
Display Features
10
Program ONOFF
2nd3rd
Am
Pm
18:88
Setup Step
Day Night
Morning
Evening
Fan On
188
Desired Set Temperature
Indicates desired room temperature(s). Also displays the highest
and lowest temperatures for the day.
Morning, Day, Evening & Night icons
Indicates the day part of the time period program.
Setup Step icon
Indicates the step number when the thermostat is in the
setup mode.
10
2nd and 3rd Stage icons
Indicates what stage of cooling or heating is currently
energized.
icon
11
Indicates the keypad has been locked.
Stage
Outdoor
188
188
COOL SET
A HEAT ETUX S
88
H
11
Lo
Page 3
Page 12
Get to Know Your Thermostat
Display Features
Program ONOFF
2nd3rd
Am
Pm
18:88
Setup Step
Day Night
Morning
Evening
5
1
Fan On
188
AuxHeat icon
Indicates 2nd stage electric strip heat is being used when the
thermostat is programmed for Heat Pump operation. Only the
Aux icon will appear during Cool to Dehumidify to indicate Reheat
operation.
Lo icon
Indicates the lowest recorded outdoor temperature for the day.
Hi icon
Indicates the highest recorded outdoor temperature for the day.
5
1
Fan On icon
Indicates constant, continuous fan operation.
When Fan On is not lit - indicates the fan will only operate when
necessary to heat or to cool.
Stage
Outdoor
188
188
COOL SET
AUX
HEAT SET
88
H
Lo
Page 4
Page 13
Quick Start
Set Clock
MODE
MODE
During Setup and Programming:
Press the WARMER or COOLER buttons to modify the selection.
Press the MODE button to advance and confirm through the setup steps.
Setting the Clock
and Day
Press the SET CLOCK button. Adjust the clock using the WARMER or COOLER
buttons. Press MODE to advance to the day setting. Adjust the day using the
WARMER or COOLER buttons. Press the SET CLOCK button to confirm settings.
TIP: To adjust the time by hours press and hold the FAN button while pressing
the WARMER or COOLER buttons.
Selecting the Heat or Cool Mode
Select mode by pressing the MODE button.
Heating Only - The HEAT setting indicates the temperature the room has to reach
before the furnace will turn on to heat the room.
Cooling Only - The COOL setting indicates the temperature the room has to reach
before the air conditioner will turn on to cool the room.
Heating or Cooling (Auto-Changeover) - AUTO will automatically select heat or cool
based on room temperature demand.
OFF - OFF indicates both heating and air conditioning systems are turned off.
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Page 14
Quick Start
Selecting Your Desired Temperature
AUTO-CHANGEOVER MODE - Pressing the WARMER or COOLER buttons in Auto or
Program mode will adjust both the heat and cool setpoints simultaneously. To adjust
heat and cool setpoints individually, choose HEAT mode to adjust the heat setpoint and
COOL mode to adjust the cool setpoint, then return to AUTO mode.
HEAT OR COOL MODE - Pressing the WARMER or COOLER buttons in Heat or
Cool mode will adjust only the heat or cool setpoints individually displayed.
Using the Fan Button
Fan On indicates constant fan operation.
You may turn the fan on even if the thermostat is in the OFF mode. Pressing the FAN
button toggles this feature on or off.
Viewing the Outdoor and Remote Temperature Sensors
OUTDOOR TEMP - Press the OUTDOOR button to view the current
outdoor temperature. The high and low temperatures for the day will
also be displayed. The high and low temperatures reset at 12:00 am.
Press the OUTDOOR button again to display POOL or SPA temperature sensors.
Keep pressing the OUTDOOR button to return to normal operation.
Note: If no outdoor sensor is connected, 2 dashes [- -] will appear with
the first button press.
REMOTE TEMP - Press the ACCSRY button to enter the accessory
setup screen. Press the WARMER button to view linked wireless and
wired sensors and other accessories. Press the ACCSRY button to
return to the main screen.
Viewing the Indoor Humidity Sensor*
IMPORTANT: Allow at least 2 minutes after the thermostat
is powered on for the humidity to read correctly.
Press the HUMIDITY button t
the thermostat. The room relative humidity is displayed in the top left corner. The
humidification setpoint appears in the larger center display and can be adjusted using
the WARMER or COOLER buttons. Press the HUMIDITY button again to view and
adjust the dehumidification setpoints.
settings and
Note: Due to variations in environmental conditions, it is not always
possible to achieve the desired humidification or dehumidification
setpoint.
return to normal operation.
o display the current humidity measured at
Press the HUMIDITY button again to confirm
Page 6
(This feature not available on all models)
ACCSRY
Page 15
Installation Instructions
Remove & Replace the Old Thermostat
To install the thermostat properly, please follow these step by
step instructions. If you are unsure about any of these steps,
call a qualified technician for assistance.
YOUR NAME
Assemble tools: Flat blade screwdriver, wire cutters and wire
Am
2:00
I
74
COOL SET
MO
HEAT ETS
Outdoor
78
85
68
COOLER MODE WARMER
strippers.
YOUR NAME
Am
Make sure your Heater/Air Conditioner is working properly
2:00
I
74
COOL SET
MO
HEAT ETS
Outdoor
78
85
68
COOLER MODE WARMER
before beginning installation of the thermostat.
YOUR NAME
Am
Carefully unpack the thermostat. Save the screws, any brack-
2:00
I
74
COOL SET
MO
HEAT ETS
Outdoor
78
85
68
COOLER MODE WARMER
ets, and instructions.
YOUR NAME
Am
Turn off the power to the Heating/Air Conditioning system at
2:00
I
74
COOL SET
MO
HEAT ETS
Outdoor
78
85
68
COOLER MODE WARMER
the main fuse panel. Most residential systems have a separate
breaker for disconnecting power to the furnace.
YOUR NAME
Am
Remove the cover of the old thermostat. If it does not come off
2:00
I
74
COOL SET
MO
HEAT ETS
Outdoor
78
85
68
COOLER MODE WARMER
easily, check for screws.
YOUR NAME
Am
Loosen the screws holding the thermostat base or subbase to the
2:00
I
74
COOL SET
MO
HEAT ETS
Outdoor
78
85
68
COOLER MODE WARMER
wall and lift away.
YOUR NAME
Am
Disconnect the wires from the old thermostat. Tape the ends
2:00
I
74
COOL SET
MO
HEAT ETS
Outdoor
78
85
68
COOLER MODE WARMER
of the wires as you disconnect them, and mark them with the
letter of the terminal for easy reconnection to the new thermostat.
YOUR NAME
Am
Keep the old thermostat for reference purposes, until your new
2:00
I
74
COOL SET
MO
HEAT ETS
Outdoor
78
85
68
COOLER MODE WARMER
thermostat is functioning properly.
Page 7
Page 16
Wire Connections
Installation Instructions
Wire Connections
YOUR NAME
Am
2:00
I
74
COOL SET
MO
If the terminal designations on your old thermostat
HEAT ETS
Outdoor
78
85
68
do not match those on the new thermostat, refer
to the chart below or the wiring diagrams
that follow.
Wire from the
old thermostat
terminal marked
G or F Fan G
Y1, Y or C
W1, W or H
C
O/B
W2
Y2
H, HUM HUM
D, DEHUM DEHUM
Ck1
CKGND
Function
Cooling Y1
Heating
PowerRh, R, M, Vr, A R
Common
Rev. Valve
2nd Stage Heat
2nd Stage Cooling
3rd Stage Heat
Humidity
Dehumidity
Dry Contact Switch
Dry Contact Switch
Install on the
new thermostat
connector marked
W1/O/B
C
W1/O/B*
W2
Y2
W3W3
DRY CONTACT
DRY CONTACT
* O/B is used if your system is a Heat Pump.
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Page 17
Installation Instructions
The LX Thermostat Backplate
R
G
W1/O/B
W2
Y1
Y2
W3
HUM
DEHUM
C
AUX
OUTDOOR
SENSOR
REMOTE
SENSOR
DRY
CONTACT
FAULT
To remove the thermostat
backplate: Using the Finger
Pull Areas, pull the front
housing away from the
backplate.
Backplate
24 VAC return
R
Fan relay
G
W1/O/B
1st stage heat circuit
2nd stage heat circuit
W2
1st stage compressor relay
Y1
2nd stage compressor relay
Y2
3rd stage heat circuit
W3
Humidifier control circuit
HUM
Dehumidifier control circuit
DEHUM
Front Housing
C
AUX
OUTDOOR
SENSOR
REMOTE
SENSOR
DRY
CONTACT
FAULT
Finger Pull Areas
24 VAC common
Aux output
Outdoor sensor
connections
Remote sensor
connections
Dry contact
connections
Fault input
IMPORTANT: This thermostat requires both
R (24 VAC Return) and C (24 VAC Common) be
connected to the backplate terminals.
Page 9
Page 18
Installation Instructions
Explanation of Thermostat Jumpers
Jumpers are located on the back of the thermostat
J1
J2
J3
GAS/ELEC
HEATPUMP
RV=O
RV=B
GAS
ELEC
OR
OR
(FAN)
OR
GAS/ELEC
HEATPUMP
GAS/ELEC
HEATPUMP
RV=O
RV=B
GAS
ELEC
(FAN)
GAS
RV=O
RV=B
This jumper configures the thermostat to control a conventional
gas/electric system or a heat pump. If your system is anything
other than a heat pump, leave this jumper set for GAS/ELEC.*
*For some commercial heat pumps, this jumper will need to
be set for GAS/ELEC. Consult the commercial heat pump literature.
When J1 is configured to control a heat pump, this jumper (J2)
must be set to control the appropriate reversing valve. If RV=O
is chosen, the W1/O/B terminal will energize in cooling. If RV=B
is chosen, the W1/O/B terminal will energize in heating.
When J1 is set for GAS/ELEC:
This jumper (J3) controls how the thermostat will control the
Fan (G) terminal in heating mode. When GAS is chosen, the
thermostat will not energize the Fan (G) terminal in heating.
When ELEC is chosen the thermostat will energize the fan in
heating.
When J1 is set for HEATPUMP:
This jumper (J3) defines the Aux Heat type. When GAS is
chosen, the auxiliary heat will not be allowed to run during
heat pump operation. When using a Dual Fuel system, set this
jumper for GAS. When ELEC is chosen, up to two stages of
auxiliary strip heat will be allowed to run.
(FAN)
J3J2J1
ELEC
OUTDOOR
CONTACT
GAS/ELEC
GAS
RV=O
J3J2J1
HEATPUMP
ELEC
RV=B
C
AUX
SENSOR
REMOTE
SENSOR
DRY
FAULT
R
G
W1/O/B
W2
Y1
Y2
W3
HUM
DEHUM
Page 10
Page 19
Installation Instructions
Sample Wiring Diagrams
Conventional Heating and Cooling Systems
3 Wire, Heat Only
Residential & Commercial 1 Stage Heating
with no Fan.
R
C
W1/O/B
J1 =
J2 =
J3 =
24VAC Power
24VAC Common
1st Stage Heat
Gas/Elec
O (not used)
Gas
4 Wire, Cool Only
Residential & Commercial 1 Stage Cooling.
R
C
Y1
G
J1 =
J2 =
J3 =
24VAC Power
24VAC Common
1st Stage Cool
Fan
Gas/Elec
O (not used)
Gas
5 Wire, 1 Stage Cooling, 1 Stage Heat
Residential & Commercial 1 Stage Cooling,
with 1 stage Gas Heat.
R
C
W1/O/B
Y1
G
J1 =
J2 =
J3 =
24VAC Power
24VAC Common
1st Stage Heat
1st Stage Cool
Fan
Gas/Elec
O (not used)
Gas
8 Wire, 2 Stage Cooling, 3 Stage Heat
Residential & Commercial 2 Stage Cooling,
with 3 stage Gas Heat.
R
C
W1/O/B
W2
W3
Y1
Y2
G
J1 =
J2 =
J3 =
24VAC Power
24VAC Common
1st Stage Heat
2nd Stage Heat
3rd Stage Heat
1st Stage Cool
2nd Stage Cool
Fan
Gas/Elec
O (not used)
Gas
Page 11
5 Wire, 1 Stage Cooling, 1 Stage Heat
Residential & Commercial 1 Stage Cooling,
with 1 stage Electric Heat.
R
C
W1/O/B
Y1
G
J1 =
J2 =
J3 =
24VAC Power
24VAC Common
1st Stage Heat
1st Stage Cool
Fan
Gas/Elec
O (not used)
Electric
Page 20
Installation Instructions
Sample Wiring Diagrams
Heat Pump Systems
5 Wire, 1 Stage Cooling, 1 Stage Heat
Residential & Commercial Heat Pump with
‘O’ Reversing Valve
R 24VAC Power
C 24VAC Common
W1/O/B Reversing Valve
Y1 1st Stage Compressor
(Cool or Heat)
G Fan
J1 = Heat Pump
J2 = O
J3 = Gas
6 Wire, 1 Stage Cooling, 2 Stage Heat
Residential & Commercial Heat Pump with
‘O’ Reversing Valve
R 24VAC Power
C 24VAC Common
W1/O/B Reversing Valve
Y1 1st Stage Compressor
(Cool or Heat)
W2 Aux Heat
G Fan
J1 = Heat Pump
J2 = O
J3 = Electric
7 Wire, 2 Stage Cooling, 3 Stage Heat
Residential & Commercial Heat Pump with
‘O’ Reversing Valve.
R 24VAC Power
C 24VAC Common
W1/O/B Reversing Valve
W2 3rd Stage Heat
Y1 1st Stage Compressor
(Cool or Heat)
Y2 2nd Stage Compressor
(Cool or Heat)
G Fan
J1 = Heat Pump
J2 = O
J3 = Electric
Setup Step 24 is set to 2
(Number of Compressor Stages)
Page 12
8 Wire, 2 Stage Cooling, 4 Stage Heat
Residential & Commercial Heat Pump with
‘O’ Reversing Valve.
R 24VAC Power
C 24VAC Common
W1/O/B Reversing Valve
W2 3rd Stage Heat
W3 4th Stage Heat
Y1 1st Stage Compressor
(Cool or Heat)
Y2 2nd Stage Compressor
(Cool or Heat)
G Fan
J1 = Heat Pump
J2 = O
J3 = Electric
Setup Step 24 is set to 2
(Number of Compressor Stages)
Page 21
Installation Instructions
Sample Wiring Diagrams
Heat Pump Systems with Dual Fuel
7 Wire, 2 Stage Cooling, 3 Stage Heat
Residential & Commercial Heat Pump with
‘O’ Reversing Valve and Fossil Fuel furnace.
R 24VAC Power
C 24VAC Common
W1/O/B Reversing Valve
W2 3rd Stage Heat
(connected to furnace)
Y1 1st Stage Compressor
(Cool or Heat)
Y2 2nd Stage Compressor
(Cool or Heat)
G Fan
Humidification or Dehumidification
Humidification
System
Dehumidification Terminal
on Equipment
DEHUM/
HUM
Dry Contact and Aux Output
J1 = Heat Pump
J2 = O
J3 = GAS
Setup Step 24 is set to 2
(Number of Compressor Stages)
Setup Step 46 is set to ON.
(Dual Fuel On, Off, or External)
R
G
W1/O/B
W2
Y1
Y2
W3
HUM
DEHUM
C
AUX
OUTDOOR
SENSOR
REMOTE
SENSOR
DRY
CONTACT
FAULT
R
G
W1/O/B
W2
Y1
Y2
W3
HUM
DEHUM
C
AUX
OUTDOOR
SENSOR
REMOTE
SENSOR
DRY
CONTACT
FAULT
Page 13
Sprinkler System
12
11
1
10
9
8
5
7
6
Time Clock
2
3
4
Page 22
Installation Instructions:
The LX thermostat has a diagnostic feature that enables testing of all
outputs. This feature is contained in Technician Setup.
To enter Technician Setup, press and hold the SETUP button for 5 seconds until
all the icons appear. Follow the next steps to view settings and test equipment.
Press MODE to view the version numbers of the thermostat.
1.
2.
Press MODE again to view the jumper settings and current state of
the Dry Contact and Fault terminals.
3.
Press MODE again and the scrolling display will read “TURN ON
EQUIPMENT?” Press WARMER for Yes or COOLER for No.
If Yes is chosen, press WARMER to turn on heat or COOLER to turn
on Cooling. The scrolling display will read “NOTHING ON.” Next:
Press WARMER to turn on and cycle up through the heating stages.
Press COOLER to turn the heating stages off. Press MODE to exit.
Press COOLER to turn on and cycle down through the cooling stages.
Press WARMER to turn the cooling stages off. Press MODE to exit.
4.
Press MODE until “CALIBRATE SENSORS?” appears on the scrolling display. Press WARMER for Yes or COOLER for No. Press
MODE to select which sensor to calibrate. Use WARMER or COOLER to modify your selection.
5.
Press MODE until “CONTROL HUM?” appears on the scrolling display. Press WARMER for On or COOLER for Off. Press MODE to
continue.
6.
Press MODE until “CONTROL DEHUM?” appears on the scrolling
display. Press WARMER for On or COOLER for Off. Press MODE
to continue.
7.
Press MODE until “CONTROL AUX OUT?” appears on the scrolling
display. Press WARMER for On or COOLER for Off. Press MODE
to exit.
To exit Technician Setup at any time, press the SETUP button. Technician Setup
will automatically exit after 10 minutes if no buttons are pressed.
Test Operation
Page 14
Page 23
User Setup:
MODE
Backlight Operation
How to Change Settings in the Setup Screens
To enter Advanced Setup, press the SETUP button, then press MODE. Use the
WARMER or COOLER buttons to adjust the value of your selection. Press
MODE to advance to the next setup step. Press SETUP again to leave the setup
screens.
SETUP
Backlight (Setup Step 3)
The thermostat backlight may be set to be always on, on temporarily with any button
press, on throughout the evening, or always off. (For always off, see Backlight Level)
Press the SETUP button, then press MODE repeatedly until the Backlight setup
step appears. Use the WARMER or COOLER buttons to make selection. Press
MODE to advance to the next step. Press SETUP to leave the setup screens.
Backlight Off - Backlight turns on with any button press and turns off after 8 seconds.
Backlight On - Backlight is on continuously.
Backlight 6pm to 6am - Backlight turns on at 6pm and turns off at 6am.
Backlight Level (Setup Step 4)
The backlight can be adjusted between always off and seven levels of brightness.
Press the SETUP button, then press MODE repeatedly until the Backlight setup
step appears. Use the WARMER or COOLER buttons to adjust the brightness.
Press MODE to advance to the next step. Press SETUP to leave the setup
screens.
Language (Setup Step 16)
Setup step instructions on the scrolling display can be set for English, Spanish, or
French.
Press the SETUP button, then press MODE repeatedly until the Language setup
step appears. Use the WARMER or COOLER buttons to make selection. Press
MODE to advance to the next step. Press SETUP to leave the setup screens.
Page 15
Page 24
User Setup:
MODE
Scrolling Screen and Display Options
Scrolling Display Method (Setup Step 17)
This option allows the user to choose how the scrolling text is displayed. Options are:
Press the SETUP button, then press MODE repeatedly until the Scrolling Method
setup step appears. Use the WARMER or COOLER buttons to make selection.
Press MODE to advance to the next step. Press SETUP to leave the setup
screens.
Scrolling
Scroll Letters Slow
Scroll Letters Fast
Scroll Words Slow
Scroll Words Fast
Non-Scrolling
Whole Words Slow
Whole Words Fast
Words Centered Slow
Words Centered Fast
1
Example of “Whole Words Centered”:
SETUP
A
SERVICE
Am
2:00
I
MO
Outdoor
85
78
COOL SET
HEAT ETS
B
FILTER
2:00
I
74
MO
Outdoor
85
68
Am
78
74
COOL SET
HEAT ETS
68
Display
This option allows the user to “de-clutter” the thermostat display screen by removing
icons from the main display. The room temperature will always be shown. Service
information may also be viewed by pressing and holding the DISPLAY button.
Each press of the DISPLAY button
will remove icons. Keep pressing
DISPLAY to make icons reappear.
Press and hold DISPLAY for 5 seconds
to view a name and phone number to
call for service.
Any removed icons will be displayed temporarily when a setting change is made.
DISPLAY
Page 16
Show All
Remove Scrolling Text
Remove Day of Week
Remove Current Time
Remove Outdoor Temp
Remove Setpoint
Remove Mode
Page 25
User Setup
(This feature not available on all models)
Vacation
VACATION
Press the VACATION button to enter Vacation programming. Use the WARMER and
COOLER buttons to choose the number of days desired to run the Vacation feature.
To confirm your settings and advance to the next step, press the VACATION button
again. Choose the desired Vacation Cool setpoint. Press VACATION. Choose the
desired Vacation Heat setpoint. Press VACATION again to return to the main screen.
When the thermostat is programmed for Vacation mode, and it is in the
Program On mode, it will take effect at 12:00 am of the next day. To turn off
Vacation mode, set the number of days to 0.
Emergency Heat
To initiate the Emergency Heat feature, Press the EMERGCY button. During
Emergency Heat operation the thermostat will turn on the fan and auxiliary
stages of heat when there is a demand for heat. The 1st stage of heating and
all stages of cooling will be unavailable. To exit Emergency Heat, press the
EMERGCY button.
Accessory
ACCSRY
The ACCSRY button allows the user to view wired and wireless sensors and
“link” these and other wireless devices to the thermostat via an optional RF
module. Press the ACCSRY button to enter the Accessory setup screen.
Press WARMER to view linked and wired accessories. Follow the instructions
included with the wireless accessory to begin linking process. Next, press
COOLER to enter the wireless linking mode. Press MODE to initiate linking.
Press ACCSRY to return to the main screen. NOTE: A wired outdoor sensor’s
temperature reading is updated once every minute; a wireless outdoor sensor’s
temperature reading is updated once every 5 minutes.
The Vacation feature allows the thermostat to
use temporary, energy saving setpoints without
having to change regular programming.
The Emergency Heat function is only
available if your thermostat is set to
EMERGCY
The optional RF Module
must be installed to link
and view wireless accessories.
control a Heat Pump.
Page 17
Page 26
User Setup:
MODE
These setup steps allow the user to monitor equipment runtimes and program
service alerts. Service alerts are displayed in the scrolling marquee.
System Runtimes
Runtime hours or days appear
in the clock display.
Press and hold FAN to clear
service alert messages from
the scrolling marquee.
RUNTIME
30
05
Setup Step
Service Filter Runtime (Setup Steps 5-6, 12-13)
(This feature not available on all models)
Press the SETUP button, then press MODE repeatedly until the desired setup
step appears. Use the WARMER or COOLER buttons to make selection. Press
MODE to advance to the next step. Press SETUP to leave the setup screens.
SETUP
Current Service Filter Runtime Hours (Setup Step 5) - This counter keeps track of
the number of hours of fan runtime in the Heating mode, Cooling mode, and in stand
alone Fan operation. Press FAN to reset.
Current Service Filter Calendar Days (Setup Step 6) -
total number of calendar days that have elapsed since the counter was reset to help
the user track Fan runtime. Press FAN to reset.
Set Service Filter Runtime Hours (Setup Step 12) - This timer allows the user to
specify the number of hours the fan will run before the “Replace Filter” alert will be
displayed. Press COOLER continuously until OFF is displayed to disable this alert.
Set Service Filter Calendar Days (Setup Step 13) - This timer allows the user to
specify the number of calendar days that will elapse before the “Replace Filter” alert
will be displayed. Press COOLER continuously until OFF is displayed to disable this
feature.
Page 18
This counter displays the
Page 27
User Setup:
To view, set, or reset System Runtimes, press the SETUP button, then press
MODE. Press MODE to advance to the desired setup step. Use the WARMER
or COOLER buttons to adjust the value of your selection. Press SETUP again
to leave the setup screens.
System Runtimes
Heating and Cooling System Runtime - Energy Watch
(Setup Steps 7 -9)
Current Heat Runtime Hours (Setup Step 7) - This counter keeps track of the number
of hours the system has run in Heating. Press FAN to reset.
Current Aux Strip Heat Runtime Hours (Setup Step 8) - This counter keeps track of
the number of hours the system has run in Auxiliary Heating. This setup step is only
available when the thermostat jumpers are configured for Heat Pump and Electric Heat.
Press FAN to reset.
Current Cool Runtime Hours (Setup Step 9) - This counter displays the number of
hours the system has run in Cooling. Press FAN to reset.
UV Lamp Runtime (Setup Steps 10, 14)
(This feature not available on all models)
Current UV Lamp Calendar Days (Setup Step 10) -
number of calendar days that have elapsed to help the user track UV lamp runtime.
Press FAN to reset.
Set UV Lamp Calendar Days (Setup Step 14) - This timer allows the user to specify
the number of calendar days the UV Lamp will operate before the “Replace UV Lamp”
alert will be displayed. Press COOLER continuously until OFF appears to disable this
alert.
Humidifier Runtime (Setup Steps 11, 15)
(This feature not available on all models)
Current Humidifier Calendar Days (Setup Step 11) - This counter displays the total
number of calendar days that have elapsed to help the user track the Humidifier runtime. Press FAN to reset.
Set Humidifier Calendar Days (Setup Step 15) - This timer allows the user to specify
the number of calendar days the Humidifier will run before the “Service Humidifier”
alert will be displayed. Press COOLER continuously until OFF appears to disable this
alert.
(This feature not available on all models)
This counter displays the total
Page 19
Page 28
MODE
User Setup:
To enter Time Period Programming
screens, Press and hold PROGRAM
until the scrolling prompt appears.
OFF - Time Period Program is off.
RUN - Time Period Program is running.
HOLD TO SET - Press and hold
PROGRAM to make Time Period
Programming changes.
Programming a Daily Schedule
Select Day of Week to program - Press the WARMER or COOLER buttons to choose
the day of the week to be programmed. Press Mode to advance to the next step.
This thermostat features four programmable time periods per 24 hour day:
Morning, Day, Evening, and Night. The start time for each time period is
adjustable. The stop time for each time period is the start time for the next.
Select Morning Start Time - Press the WARMER or COOLER buttons to adjust the
time of day desired. Press MODE to advance to the next step.
Select Morning Cool Setpoint - Press the WARMER or COOLER buttons to adjust
the cool setpoint desired. Press MODE to advance to the next step.
Select Morning Heat Setpoint - Press the WARMER or COOLER buttons to adjust
the heat setpoint desired. Press MODE to advance to the next step.
Repeat Start Time and Setpoint programming for Day, Evening, and Night.
Copy Current Day to Next - Press the WARMER button to Copy the current day’s
to program to another day. Press the WARMER or COOLER buttons to choose which
day to copy to. Press MODE to confirm. Continue to press MODE to copy to more
days. Press the COOLER button to program another day with a different schedule.
Program Another Day - Press the COOLER button to choose to program another day
with a different schedule. Press MODE. Press the WARMER or COOLER buttons to
choose the desired day. Press MODE to advance to the next step.
Press the PROGRAM Button to exit Time Period Programming
Time Period Programming
PROGRAM
RUN
OFF
HOLD TO SET
OFF
RUN
HOLD TO SET
SET PROGRA M
Page 20
Page 29
MODE
Installer Setup
How to Change Settings in the Setup Screens
To enter Advanced Setup, press the SETUP button, then press MODE. Use the
WARMER or COOLER buttons to adjust the value of your selection. Press
MODE to advance to the next setup step. Press SETUP again to leave the setup
screens.
SETUP
Selecting Your Program Mode (Setup Step 1)
This thermostat may be configured to be programmable or non-programmable.
7 Day Program - Allows all seven days to be programmed independently.
Non Program - No advanced time period programming available.
1 Day Program - Allows one 24 hour day to be programmed. This same schedule will
be repeated everyday the program is set to run.
5/2 Day Program - Allows weekdays and weekends to be programmed independently.
Selecting Your Available Modes (Setup Step 2)
Auto-Changeover - Allows the thermostat to turn on heating or cooling based on
room temperature demand. Also allows the manual selection of HEAT only or COOL
only and OFF.
Heat and Cool - Allows the thermostat to turn on heating or cooling depending on
which one has been manually selected. Auto-Changeover is not available when this is
selected.
Heat Only - Allows the thermostat to only turn on HEAT or OFF modes.
Cool Only - Allows the thermostat to only turn on COOL or OFF modes.
Page 21
Page 30
Installer Setup
Setpoint Limits (Setup Step 18)
(This feature not available on all models)
When this feature is set to ON, the heat and cool setpoints can be restricted to preset
levels, set in steps 19 and 20.
Maximum Heat Setpoint (Setup Step 19) - (35 - 99 ).
Minimum Cool Setpoint (Setup Step 20) - (35 - 99 ).
Cycles Per Hour (Setup Step 21)
The Cycles Per Hour setting may limit the number of times per hour
your HVAC unit may energize. For example, at a setting of 6 cycles
per hour the HVAC unit will only be allowed to energize once every 10
minutes. The Cycles Per Hour limit may be overridden and reset by
pressing the WARMER or COOLER buttons on the thermostat. Settings
are No Limit, 2, 3, 4, 5, or 6.
Compressor Minimum Off Minutes (Setup Step 22)
This feature allows the user to set a minimum off time for the compressor. Settings are
5 mins., 3 mins., or 0 mins.
Minimum Heat/Cool Setpoint Difference(Setup Step 23)
This feature allows the user to set the minimum gap between Heat and Cool setpoints
in AUTO mode. Select from 0 to 6. If setup step 2 is not set for AUTO-CHANGEOVER,
this step will not appear.
Number of Compressor Stages (Setup Step 24)
This feature is for heat pump application only.
This feature allows the thermostat to control 1 or 2 compressor stages when configured
for heat pump.
NOTE: When step 50 (Dual Fuel) is set to ON or EXTERNAL, this
step will not appear and Compressor Stages will automatically be set to 2.
Page 22
Page 31
Installer Setup
Deadband Settings (Setup Steps 25 - 34)
The Deadband is the number of degrees or minutes that the thermostat
waits before it initiates the stages of heating or cooling.
1st Stage Deadband (Setup Step 25) - Specifies the minimum temperature difference
between the room temperature and the desired setpoint before the first stage of heating
or cooling is allowed to turn on. (1 - 6 degrees) For example, if the heat setpoint is 68
and the 1st Stage deadband is set to 2 degrees, the room temperature will need to
reach 66 degrees before the heat turns on.
2nd Stage Deadband (Setup Step 26) - Specifies the additional minimum temperature
difference after the first stage turns on before the second stage is activated. (0 - 10 )
3rd Stage Deadband (Setup Step 27) - Specifies the additional minimum temperature
difference after the second stage turns on before the third stage is activated. (0 - 10 )
4th Stage Deadband (Setup Step 28) - (Two Stage heat pump only) - Specifies the
additional minimum temperature difference after the third stage turns on before the
final stage of strip heat is activated. (0 - 10 )
Minutes Between 1st and 2nd Stage (Setup Step 29) - Specifies the minimum time
(in minutes) after the first stage turns on before the second stage can turn on. (0 - 60)
Minutes Between 2nd and 3rd Stage (Setup Step 30) - Specifies the minimum time
(in minutes) after the second stage turns on before the third stage can turn on. (0 - 60)
Delay Between 3rd and 4th Stage (Setup Step 31) - Specifies the minimum time
(in minutes) after the third stage turns on before the final stage can turn on. (0 - 60)
Second Stage on Until Deadband (Setup Step 32) - Specifies whether second stage
will turn off at first stage deadband or remain on until the room temperature demand is
satisfied. Choose between Deadband or Setpoint.
Third Stage on Until Deadband (Setup Step 33) - Specifies whether third stage will
turn off at second stage deadband or remain on until the room temperature demand is
satisfied. Choose between Deadband or Setpoint.
Fourth Stage on Until Deadband (Setup Step 34) - Specifies whether fourth stage
will turn off at third stage deadband or remain on until the room temperature demand is
satisfied. Choose between Deadband or Setpoint.
Page 23
Page 32
Installer Setup
Programming the Fan (Setup Steps 35 - 38)
(This feature not available on all models)
Fan Program (Setup Step 35) - This feature allows the fan to be programmed to turn
on automatically for a specified period during the day. If this feature is set to ON, the
next three steps will appear.
Minutes Of Fan Runtime Per Hour (Setup Step 36) - This setting specifies the number of minutes (0 - 60, in increments of 5) that the fan will run at the top of each hour.
Fan Program Start Time (Setup Step 37) - This setting specifies the hour of each day
when the programmable fan feature will start.
Fan Program Stop Time (Setup Step 38) - This setting specifies the hour of each day
when the programmable fan feature will stop. NOTE: Setting the Stop Hour equal to
the Start Hour will cause the fan to run 24 hours a day.
Fan Off Delay in Seconds (Setup Step 55)
(This feature not available on all models)
This feature allows the user to increase the cooling or electric strip heating efficiency
of the system. The thermostat may be programmed to continue running the fan after a
call for cooling or electric strip heating has been satisfied. This delay can be set for 0,
30, 60, 90, or 120 seconds. If set to 0, the fan will not run after a call for cooling or
electric strip heating has been satisfied.
Comfort Recovery (setup step 69)
(This feature not available on all models)
With Comfort Recovery on, the thermostat will attempt to reach the Morning
setpoint temperature at the exact time programmed into the thermostat. Comfort
Recovery, only works when the thermostat enters the Morning mode from the
Night mode. For example, if the Night program is set for 11pm at 65°F heating
and 85°F cooling, and the Morning program is set for 6am at 72°F heating and
75°F cooling, the thermostat will turn the system on before 6am in an effort to
bring the temperature to its correct setting at exactly 6am. The thermostat
learns from experience, so please allow 4-8 days after a program change or
after initial installation to give Comfort Recovery time to adjust. If used with a
heat pump, electric strip heat will be disabled while Comfort Recovery is active.
Page 24
Page 33
Installer Setup
Humidity and Dehumidity (Setup Steps 40 -45, 70-71)
(This feature not available on all models)
Humidity Only With Heat (Setup Step 40) - When this step is set to ON, Humidity
will not run without a demand for Heat.
Fan With Humidity Demand (Setup Step 41) - Specifies if the fan should be turned
on with a demand for Humidity. (This step will only appear if step 40 is set to OFF.)
Humidity Setpoints (Setup Step 42) - Specifies whether the Humidity setpoint should
be entered by the user (MANUAL) or determined automatically by outdoor temperature
(AUTO). An outdoor temperature sensor is required for the AUTO setting. If the outdoor temperature sensor stops reading while this step is set to AUTO, the Humidity
setpoint will revert automatically to a setting of 15 percent.
Cool To Dehumidify (Setup Step 43) - Specifies if the cooling equipment is allowed to
turn on exclusively to lower room humidity. (If set to OFF. the following two steps will
not appear.)
Max Dehum Overcool (Setup Step 44) - Specifies how many degrees below the Cool
setpoint the air conditioning will run to satisfy a Cool to Dehumidify demand. (0 - 5 )
Reheat Operation With Cool To Dehumidify (Setup Step 45) - Specifies if electric
strip heat is allowed to turn on during a Cool to Dehumidify demand to help maintain
desired room temperature. This step is not available if Electric Heat is not present.
HUM Output Polarity (Setup Step 73)
Open (Normally Open) means no voltage is sent to the HUM output when there is no
demand for humidity.
Closed (Normally Closed) means voltage is sent to the HUM output when there is no
demand for humidity.
DEHUM Output Polarity (Setup Step 74)
Open (Normally Open) means no voltage is sent to the DEHUM output when there is
no demand to dehumidify.
Closed (Normally Closed) means voltage is sent to the DEHUM output when there is
no demand to dehumidify.
Page 25
Page 34
Installer Setup
Lockout Heat Pump On Outdoor Temp
This feature stops the heat pump from running below a specified outdoor temperature,
where the heat pump has become inefficient or could damage equipment.
Lockout Heat Pump With Outdoor Temp (Setup Step 46) - When set to ON, the Heat
Pump Lockout feature is enabled. When set to OFF, the heat pump will stage normally.
Heat Pump Lockout Temp (Setup Step 47) - (10 - 45 ) This step allows the user to set
the temperature at which the heat pump will be locked out. Adjustable from 10 to 45
degrees Fahrenheit in five degree increments.
(Setup Steps 46 -47)
Auxiliary Heat Lockout (Setup Steps 48 -49)
This feature allows the auxiliary heat for a heat pump
(W2 and W3) to be locked out above a specific outdoor
temperature. These steps will only appear if the
thermostat jumper J1 is set for Heat Pump and J3
is set for Electric Heat.
Lockout Aux Heat With Outdoor Temp (Setup Step 48) - When set to ON, the Aux
Heat Lockout feature is enabled. When set to OFF, Auxiliary Heat will stage normally.
Aux Heat Lockout Temp (Setup Step 49) - (20 - 75 ) This step allows the user to set
the temperature at which Auxiliary Heat will be locked out. Adjustable from 20 to 75
degrees Fahrenheit.
NOTE: This temperature setting cannot be lower than 5 degrees above
the Heat Pump Lockout temperature.
Dual Fuel (Setup Steps 50 - 54)
(This feature not available on all models)
This feature is for heat pump applications only.
Steps 50 - 54 will only appear if the thermostat jumper
J1 is set for Heat Pump and J3 is set for Gas Heat.
Dual Fuel On, Off, or External (Setup Step 50) - On - Tells the thermostat an outdoor
temperature or a demand for third stage heat will be used to stop running the heat pump
and only run a fossil fuel source of heat. NOTE: Once the change to fossil fuel is made,
the heat demand must finish with fossil fuel. Additional heat demands within 10 minutes
will also use fossil fuel, regardless of outdoor temperature. External - This setting
allows the use of an external fossil fuel kit. This may be a third party fossil fuel kit or
part of the heat pump control. CAUTION - this setting will allow the heat pump and furnace to run at
the same time unless an external fossil fuel kit is properly connected.
(If External is chosen setup steps 51 - 54 will not have any effect.)
Page 26
Jumpers are located on the
back of the thermostat
GAS/ELEC
HEATPUMP
Jumpers are located on the
back of the thermostat
GAS/ELEC
HEATPUMP
RV=O
RV=B
RV=O
RV=B
GAS
J3J2J1
ELEC
GAS
J3J2J1
ELEC
Page 35
Installer Setup
Dual Fuel (Cont.)
Dual Fuel Safety Timer (Setup Step 51) - On/Off When this feature is set to ON, the
room temperature must rise 1 degree within 60 minutes after a switch to fossil fuel has
been made. If the room temperature does not rise, the fossil fuel system will cease
operating and the heat pump will be restarted.
Dual Fuel Changeover on Outdoor Temp (Setup Step 52) - ON, the change from Heat
Pump to a fossil fuel source of heat will be based on outdoor temperature. OFF, Heat
Pump heating will be terminated when there is a demand for third stage heat.
Dual Fuel Balance Point (Setup Step 53) - (5 - 60 ) Specifies the outdoor temperature
at which the heat pump will cease operating and a fossil fuel source of heat is used.
Dual Fuel Changeover Delay (Setup Step 54) - (0 - 90) Specifies the number of
seconds the heat pump is allowed to continue running after a fossil fuel heat source
has been engaged.
Control To Temp Source (Setup Step 39)
(This feature not available on all models)
This feature allows the user to specify which sensor source the thermostat
will use to measure room temperature. Thermostat: Uses the internal thermostat
sensor only. Remote Sensor: Uses wireless or wired sensors only. Average Of
Remote Sensor And Thermostat: Averages the temperatures of the remote sensor(s)
and the thermostat. NOTE: If a remote sensor is being used, the degree icon on the
large room temperature display will blink.
Setup steps 51-54 will only appear if step 50 is set to ON.
temperature
Fahrenheit or Celsius (setup step 56)
This feature allows the thermostat to display temperature in Fahrenheit or Celsius.
Fault Type (setup step 72)
This step allows the FAULT terminal on the thermostat to be configured for three
different settings:
NONE - Scrolling display shows ‘FAULT’ when a fault signal is active.
YORK - Fault alerts 2 or 3 are interpreted from a Yorkguard Heat Pump Control.
COMFORT ALERT - Fault alerts are controlled by the Comfort Alert accessory.
Page 27
Page 36
Installer Setup
Auxiliary Output
(This feature not available on all models)
The LX Thermostat is equipped with a programmable auxiliary output. This output can
be configured to be controlled from a variety of sources.
Aux Output Polarity (Setup Step 57)
Open (Normally Open) or Closed (Normally Closed).
Aux Output (Setup Step 58)
Choices are:
Time - Uses the internal clock of the thermostat.
Temp - Uses one of three temperature sources.
External - The Auxiliary Output is controlled from an external accessory source,
like Comfort Call.
Error - Uses the thermostat’s error processing to signal an active error condition.
Free Cooling - Drives a damper to bring fresh air in from outdoors.
Venting - Drives a damper to exhaust inside air to the outside.
Auxiliary Output Programming By Time
If TIME is selected for the Aux Output, the following setup steps will appear:
Aux Output Days (Setup Step 59) - Specifies if the Aux Output will be single day (1
DAY), weekday/weekend (5/2 DAY), or seven day (7 DAY) programmable.
Day Of Week To Program (Setup Step 60) - Specifies which day of week to program.
Aux Output Start Time (Setup Step 61) - Specifies the time of each day when the
Aux output will turn on.
Aux Output Stop Time (Setup Step 62) - Specifies the time of each day when the
Aux output will turn off.
Copy (Setup Step 63) - This step only appears if Aux Output Days (Setup Step 59) is
set for 7 programmable output days.
- Specifies if the Auxiliary output will be
- Specifies which source will control the Aux output.
Page 28
Page 37
Installer Setup
Auxiliary Output Programming By Temp
If TEMP is selected for the Aux Output, the following setup steps will appear:
Aux Output Temp Source (Setup Step 64) -
Specifies what temperature source
will be monitored for controlling the programmable output. The options are:
Thermostat - Temperature is monitored from the thermostat sensor.
Outdoor Sensor - Temperature is monitored from the Outdoor temperature sensor.
Wired Remote - Temperature is monitored from a wired sensor connected to the
Remote Sensor terminals.
External - The Auxiliary Output is controlled from an external accessory source.
Aux Output Trigger Point Temp (Setup Step 65) - Specifies the temperature from
the above selected source above which the Aux Output is triggered. A non-adjustable
two degree deadband is applied to avoid frequent triggering. The ‘N.O.’ (Normally
Open) or ‘N.C.’ (Normally Closed) function (Setup Step 57) can be altered to make the
output trigger below the set temperature. Temps are adjustable from 0 - 120 degrees
Fahrenheit.
Aux Output Error Level (Setup Step 66)
ERROR, three choices of error levels exist:
Level 1 - Aux Output is active if a Critical, Alarm, or Alert error is present.
Level 2 - Aux Output is active if a Critical or Alarm error is present.
Level 3 - Aux Output is active only if a Critical error is present.
Critical Error - Service or immediate attention is required.
Alarm Error -
Alert Error - Runtimes, Low Battery on wireless remote sensors, etc.
Press Fan To Clear All Messages (setup step 75)
This feature allows the user to clear all current error messages from the display.
Service or immediate attention is recommended.
- When the Aux Output is set for
Page 29
Page 38
Installer Setup
Free Cooling (Setup Steps 67 - 68)
Free Cooling is an energy saving way to boost the efficiency of your air conditioning
system by bringing in fresh air from the outside. The installation of a Free Cooling
damper and outdoor temperature sensor may also be required.
Free Cooling With A/C (Setup Step 67) - When the Aux Output is being used for
Free Cooling and an air conditioning system is present, set this step to ON. Fresh,
outside air may be used for first stage cooling in place of your air conditioner. If your
system does not have an air conditioner installed, set this step to OFF. This will enable all stages of cooling to use only the Free Cooling damper.
Free Cooling Usable Temp (Setup Step 68) - This step allows the user to specify the
outdoor temperature below which Free Cooling can be utilized. For example, if this
step is set for 65 degrees, Free Cooling will be used until the outdoor temp rises above
65. Temps are adjustable from 40 to 80 degrees Fahrenheit.
Venting
The Venting feature allows your HVAC system to exhaust air from inside to the outside,
when there is a cooling call. Press FAN twice to activate Venting. While Venting is
active, heating and cooling are disabled. The installation of a Venting damper will be
required.
To use Venting, Setup Step 58 must be set to ‘VENTING’.
To use Free Cooling, Setup Step 58
must be set to ‘FREE COOLING’.
Dry Contact Operation(setup step 70 - 71)
Dry Contact Polarity (Setup Step 70)
Open (Normally Open) - The dry contact
is open until the connected device closes
the circuit.
‘Idle’ ‘Active’
Dry
Contact
Dry
Dry
Contact
Contact
Dry Contact Use (Setup Step 71)
PAN - If PAN is selected when the dry contact is active, the thermostat will lockout the
compressor terminal(s) and “SERVICE DRAIN PAN” will appear on the display.
VACATION - If VACATION is selected when the dry contact is active, the thermostat
will be forced into Vacation Mode.
Closed (Normally Closed) - The dry
contact is closed until the connected
device opens the circuit.
‘Idle’ ‘Active’
Dry
Dry
Contact
Contact
Dry
Page 30
Contact
Page 39
MODE
Installer Setup
Resetting the Thermostat to the
Factory Default Settings (for default values see page 34)
If, for any reason, you desire to return all the stored settings back to
the factory default settings, follow the instructions below.
WARNING: This will reset all Time Period and Advanced
Programming to the default settings. Any information entered
prior to this reset may be permanently lost.
Press and hold SETUP for 5 seconds. All icons will appear on the display.
Keep pressing the SETUP
SETUP
After all the icons appear, release SETUP. Press and hold FAN for 5 seconds.
DEFAULTS will appear on the display.
After DEFAULTS appears, release FAN. Press MODE to return to normal
operation.
button until you see this
screen.
Keep pressing the FAN
button until you see this
screen.
18:88
Setup Step
Day Night
Morning
Evening
Fan On
Outdoor
188
188
DEFAULTS
Program ONOFF
2nd3rd
Am
Pm
Stage
188
COOL SET
A HEAT ETUX S
88
H
Lo
Page 31
Page 40
MODE
Installer Setup
Locking/Unlocking the Keypad
To prevent unauthorized use of the thermostat, the front panel buttons may be
disabled. To disable, or ‘lock’ the keypad, press and hold the MODE button.
While holding the MODE button, press the WARMER and COOLER buttons
together. The icon will appear on the display, then release the buttons.
Am
2:00
Press all three
buttons in the order
outlined above for
keypad lockout
I
MO
Outdoor
85
78
74
COOL SET
HEAT ETS
68
To unlock the keypad,
press and hold the MODE button. While holding
the MODE button, press the WARMER and COOLER buttons together.
The icon will disappear from the display, then release the buttons.
Page 32
Page 41
Technician Setup
MODE
To enter Technician Setup, press and hold the SETUP button for 5 seconds.
After all the icons appear, press MODE. The version number of the thermostat
will appear in the scrolling text. Press MODE to advance to the next step. Use
the WARMER or COOLER buttons to adjust the value of your selection. To leave
Technician Setup, press SETUP.
Hold for 5 seconds All icons appear Press MODE to advance
Program ONOFF
2nd3rd
Am
Pm
18:88
Stage
Setup Step
SETUP
Technician Setup is for diagnostic and testing purposes and is intended for use
by a qualified technician. See page 14 for more detailed instructions.
Day Night
Morning
Evening
Fan On
Outdoor
188
188
188
COOL SET
A HEAT ETUX S
88
Technician Setup contains the following options:
View the version number of the thermostat.
View the jumper setting of J1 (Gas/Electric or Heat Pump), J2 (Reversing Valve:
RV=O or RV=B), and J3 (Fan: Gas or Electric) jumpers located on the back of the
thermostat. (Remove thermostat from backplate for access)
View the state of the Dry Contact and Fault terminals.
Turn on equipment outputs for testing.
Calibrate thermostat, remote, and humidity sensors.
Control HUM output (On or Off)
Control DEHUM output (On or Off)
Control AUX output (On or Off)
Page 33
through the setup steps
H
Press WARMER or COOLER
to adjust the selection
Lo
Page 42
Advanced Setup Table
Description
Step#
Prog Mode
1
Available Modes
2
3
Backlight
4
Backlight Level
5
Current Service Filter Runtime Hours
6
Current Service Filter Calendar Days
7
*Current Heat Runtime Hours
8
*Current Strip Heat Runtime Hours
9
*Current Cool Runtime Hours
10
Current UV Lamp Calendar Days
11
*Current Humidifier Calendar Days
12
Set Service Filter Runtime Hours
13
Set Service Filter Calendar Days
14
Set UV Lamp Calendar Days
15
*Set Humidifier Calendar Days
16
Language
17
Scrolling Method
18
*Setpoint Limits
19
*Max Heat Setpoint
20
*Min Cool Setpoint
21
Cycles Per Hour
22
Compressor Minimum Off Minutes
23
Minimum Heat/Cool Setpoint Difference
24
Number Of Compressor Stages
25
*1st Stage Deadband
26
*2nd Stage Deadband
27
*3rd Stage Deadband
28
*4th Stage Deadband
29
*Minutes Between 1st and 2nd Stage
30
*Minutes Between 2nd and 3rd Stage
31
*Minutes Between 3rd and 4th Stage
32
*2nd Stage Turnoff Point
33
*3rd Stage Turnoff Point
Pg#
Page 34
Df = Factory Default Setting
*Not available on all models
Range
Non,1,5/2*,7*
21
Heat/Cool/Auto/Off,
21
Heat/Cool/Off,Heat/Off,
Cool/Off
15
On,Off,6pm-6am
15
Off-7 levels of brightness
18
0-1999
18
0-1999
19
0-1999
19
0-1999
19
0-1999
19
0-1999
19
0-1999
18
0-1950
18
0-720
19
0-720
19
0-720
English,Espanol,Francais
15
16
L-R Slow,L-R Fast,Word
L-R Slow,Word L-R Fast,
Whole Word L Slow,
Whole Word L Fast,
Whole Word Ctr Slow,
Whole Word Ctr Fast
22
No,Use
22
35-99
22
35-99
22
No Limit,2,3,4,5,6
22
0,3,5
22
0-6
22
1,2
23
1-6
23
0-10
23
0-10
23
0-10
23
0-60
23
0-60
23
0-60
23
Deadband,Setpoint
23
Deadband,Setpoint
Df
7
Heat/Cool/
Auto/Off
6pm-6am
Level 5
0
0
0
0
0
0
0
0
0
0
0
English
Whole
Word Ctr
Fast
No
74
70
6
5
2
1
2
2
2
2
2
2
2
Deadband
Deadband
Page 43
Advanced Setup Table
Description
Step#
*4th Stage Turnoff Point
34
*Fan Program
35
*Minutes of Fan Runtime Per Hour
36
*Fan Program Start Time
37
*Fan Program Stop Time
38
*Control to Temp Source
39
*Humidity Only With Heat
40
*Fan With Humidity Demand
41
*Humidity Setpoints
42
*Cool To Dehumidify
43
*Maximum Dehum Overcool
44
*Reheat Operation W/Cool To Dehumidify
45
*Lockout Heat Pump W/Outdoor Temp
46
*Heat Pump Lockout Temp
47
*Lockout Aux Heat W/Outdoor Temp
48
49
*Aux Heat Lockout Temp
50
*Dual Fuel
51
*Dual Fuel Safety Timer
52
*Dual Fuel Changeover On Outdoor Temp
53
*Dual Fuel Balance Point
54
*Dual Fuel Changeover Delay In Seconds
55
*Fan Off Delay In Seconds
56
F/C
57
*Aux Output Polarity
58
*Aux Output
59
*Aux Output Program Days
60
*Day Of Week To Program
61
*Aux Output Start Time
62
*Aux Output Stop Time
63
*Copy
64
*Aux Output Temp Source
65
*Aux Output Trigger Point Temp
66
*Aux Output Error Level
67
*Free Cooling With A/C
68
*Free Cooling Usable Temp
69
*Comfort Recovery
70
Dry Contact Polarity
71
*Dry Contact Use
72
*Fault Type
Page 35
Df = Factory Default Setting
*Not available on all models
Pg#
Range
Deadband,Setpoint
23
On,Off
24
0-60
24
12am-12am
24
12am-12am
24
Tstat,Remote,Average
27
On,Off
25
Fan on,Fan off
25
Auto,Manual
25
Off,On
25
0-5
25
25
On,Off
26
On,Off
26
10-45
26
On,Off
26
20-75
26
On,Off,External
27
On,Off
27
On,Off
27
5-60
27
0-90
24
0,120
27
Fahrenheit,Celsius
28
Open,Closed
28
Time,Temp,Ext.,Error,
Free Cooling,Venting
28
1,5/2,7
28
M-M
28
12a-12a
28
12a-12a
28
Yes,No
29
Tstat,Outdoor,Ctrl,Ext.
29
0-120
29
1-3
30
Without A/C,With A/C
30
40-80
24
On,Off
30
Open,Closed
30
Pan,Vacation
27
None,York,Comfort Alert
Df
Deadband
Off
0
7am
9pm
Tstat
Off
Fan Off
Manual
Off
2
Off
Off
35
Off
20
Off
Off
On
35
0
0
F
Open
Time
1
MTWTFSS
7a
9p
No
Ctrl
65
3
With A/C
65
Off
Open
Vacation
None
Page 44
Advanced Setup Table
Description
Step#
*Humidity Polarity
73
*Dehumidify Polarity
74
Press Fan To Clear All Messages
75
Df = Factory Default Setting
*Not available on all models
Pg#
Range
Open,Closed
25
Open,Closed
25
N/A
29
Df
Open
Open
N/A
Page 36
Page 45
TroubleShooting
YOUR NAME
Am
SYMPTOM: The air conditioning does not attempt to turn on.
2:00
I
74
COOL SET
MO
HEAT ETS
Outdoor
78
85
68
COOLER MODE WARMER
CAUSE: The compressor timer lockout may prevent the air
conditioner from turning on for a period of time.
REMEDY: Consult the Owner's Manual in the Installer Setup
section to defeat the Cycles Per Hour (page 22).
YOUR NAME
Am
SYMPTOM: The display is blank.
2:00
I
74
COOL SET
MO
HEAT ETS
Outdoor
78
85
68
COOLER MODE WARMER
CAUSE: Lack of proper power.
REMEDY: Make sure the power is on to the furnace and that
you have 24vac between R & C.
YOUR NAME
Am
SYMPTOM: The air conditioning does not attempt to turn on.
2:00
I
74
COOL SET
MO
HEAT ETS
Outdoor
78
85
68
COOLER MODE WARMER
CAUSE: The cooling setpoint is set too high.
REMEDY: Lower the cooling setpoint or lower the cooling set-
point limit. See Setpoint Limits (page 22).
YOUR NAME
Am
SYMPTOM: The heating does not attempt to turn on.
2:00
I
74
COOL SET
MO
HEAT ETS
Outdoor
78
85
68
COOLER MODE WARMER
CAUSE: The heating setpoint is set too low.
REMEDY: Raise the heating setpoint or raise the heating set-
point limit. See Setpoint Limits (page 22).
YOUR NAME
Am
2:00
I
74
SYMPTOM: When controlling a residential heat pump, and
COOL SET
MO
HEAT ETS
Outdoor
78
85
68
COOLER MODE WARMER
asking for cooling, the heat comes on.
CAUSE: The thermostat reversing valve jumper is set for “B”.
REMEDY: Set the reversing valve jumper for “O”.
YOUR NAME
Am
2:00
I
74
SYMPTOM: When calling for cooling, both the heat and cool
COOL SET
MO
HEAT ETS
Outdoor
78
85
68
COOLER MODE WARMER
come on.
CAUSE: The thermostat equipment jumper is configured for
“HP” and the HVAC unit is a Gas/Electric.
REMEDY: Set the equipment jumper for “Gas”.
YOUR NAME
Am
2:00
I
74
SYMPTOM: When the Program button is pressed, the display
COOL SET
MO
HEAT ETS
Outdoor
78
85
68
COOLER MODE WARMER
reads “DISABLED”.
CAUSE: Program mode is set to “NON PROGRAM”.
REMEDY: Set Program Mode (Setup 1) to 1, 5/2, or 7 Day.
See Selecting Your Program Mode (page 21).
Page 37
Page 46
Index
display, 1, 16
emergency heat, 1, 17
fan, 1, 6, 16
front panel, 1
humidity, 1, 6
Alerts
see Runtime
Accessory, 17
Auto
adjust temperature, 6
changeover, 21
fan, 6
mode, 5, 21
Aux icon, 4
AuxHeat icon, 3
Aux Heat Lockout, 26
Auxiliary Output,
28, 29
Average
thermostat sensor, 27
b reversing valve, 33,
10
Backplate, 9
Balance Point, 27
Buttons
accessory, 1, 17
cooler (down) 1, 5
mode, 1, 5
outdoor, 1, 6
program, 1, 20
set clock, 1, 5
setup, 1, 15, 21
vacation, 1, 17
warmer (Up), 1, 5
C, 27
Calibration, 33
Celsius, 27
Clock
display, 2
setting, 5
Comfort Recovery, 24
Compressor Lockout,
26
Cool
1st stage
deadband, see
Deadband
dehum, 25
minutes of run-
time,23
2nd stage
deadband, see
Deadband
dehum, 25
minutes of run time, 23
turn off
temperature,
23
deadband, see
Deadband
droop, see Deadband
electric/heat pump,
10
icon, 2
indicator, 1
mode, 2, 5
overcool, see
Overcool
program, see Program
runtime, see Runtime
setpoint, 3, 6, 20
to dehumidify, see
Dehumidify
Condensate Drain Pan,
26
Copy Function
see Program
Cycles Per Hour, 22
Page 38
Page 47
Index
Day
icon, 3
programming, 20
setting, 20
Deadband
balance point, 23
1st stage, 23
2nd stage, 23
3rd stage, 23
Dehumidify
Aux icon, 2
cool to, 25
dehum settings, 25
setpoint, 25
Delay
fan-off, see Fan
time between stages,
see Time Delay
Differential
heat and cool, 22
Disabled Keypad
see Keypad Lockout
Drain Pan Overflow
Alarm, see Dry Contact
Dry Contact
operation, 30
polarity, 30
service pan, 30
vacation, 17, 30
Dual Fuel
changeover balance
point, 27
control two heat
sources, 26
operation, 26
outdoor sensor,
6, 27
safety timer, 27
EH, 32
Electric Heating
AuxHeat icon, 2
jumper setting, 10
reheat, 25
Emergency Heat,
17
Energy Watch
cool, 19
heat, 19
Page 39
Factory Defaults
caution, i
settings, 34, 35, 36
resetting, 31
Fahrenheit, 27
Fan
button function, see
Buttons
off time delay, 24
on during heat, see
Electric Heat
on icon, 4
program, see
Programmable Fan
runtime, 18
2nd stage heat, see
Emergency Heat
speed, see Dehumidify
with humidity, 25
Fault, 27
Free Cooling, 30
Gas/Electric Furnace
jumper, 10
Page 48
Index
Green Indicator, 1
Heat
1st stage
deadband, see
Deadband
emergency heat,
17
minutes of run time, 23
2nd stage
deadband, see
Deadband
emergency heat,
17
electric strip heat,
17
minutes of run time, 23
3rd stage
deadband, see
Deadband
AuxHeat icon, 2
deadband, see
Deadband
droop, see Deadband
electric/heat pump,
10
icon, 4
indicator, 1
mode, 2, 5
program, see
Program
runtime, see Run Time
setpoint, 6, 20
Heat Pump
AuxHeat, 12, 13, 26
AUXHeat Lockout
27
emergency heat,
17
heat pump Lockout
26
jumper setting, 10
multi-stage, 12, 22
Hi
icon, 2
temperature,6
Humidify
service, 19
setpoint, 25
with Fan, 25
Icon, 2
Page 40
Jumpers
ELEC, 10
electric heat, 10
gas electric, 10
heat pump, 10
reversing valve,10
viewing, 24
Keypad Lockout, 32
LCD, 1
Locked Indication,
see Keypad Lockout
Page 49
Index
Lo
icon, 4
temperature, 6
Manual
changeover, 21
cool, 21
heat, 21
Maximum Outdoor
Temperature, see Hi
Minimum Outdoor
Temperature,
see Lo
MISC
jumper, see Jumpers
Mode, 2, 5, 21
Multi-stage
Operation, 23
Non-Programmable
Thermostat, 21
Normally
Open/Closed,
dry contact, 26
programmable
output, 28
dehum terminal,
25
O Reversing Valve
see Reversing Valve
Off Mode, 2, 5
Outdoor
button, see Buttons
icon, 1
sensor, 6
viewing
temperature, 6
Overcool, 25
Pan, Service
see Dry Contact
Phone-based
operation
see Programmable
Output
Polarity, see Dry Contact
Program
Copy, 20, 28
Page 41
daily schedule, 20
mode, 21
worksheet, back page
Programmable Fan
24
Auxiliary Output
external control, 28
error, 28
temperature-based
control, 28, 29
time-based control,
28
Programmable
Thermostat, 21
Programming a Daily
Schedule, 20
Reheat
during cool to
dehumidify, 25
electric heating, 25
function, 25
Page 50
Index
Remote Sensor
averaging with
Thermostat, 27
calibrate, 33,14
control to, 27
outdoor temperature,
see Outdoor
read to, 6
viewing, 6
Reset
alert messages, 18
thermostat settings,
see Factory Defaults
runtime
fan/filter, 18
humidify, 19
UV light, 19
Reversing Valve, 10
Runtime
resetting, see Reset
setting,
humidifier, 19
service filter, 18
UV light, 19
viewing,
cool, 19
heat, 19
humidification, 19
UV lamp, 19
Schedule
Daily, see Program
2nd stage turn off
temperature,
23
Sensor
outdoor, see Outdoor
remote, see Remote
thermostat, see
Thermostat
Service
filter icon, see Reset
humidify icon, see
Reset
pan icon, see Dry
Contact
UV light, see Reset
Set Clock, see Clock
Setpoint
Auxiliary Output,
28
balance point, 26
cool, see Cool
dehumidification,
25
heat, see Heat
vacation, 17
humidification, 25
Simplest Operation,
5
Technician Setup, 14, 33
Terminal, MISC, see
MISC
Thermostat Sensor
averaging, 27
calibrate, 33,14
Three Stage Heat, 11,
12, 13, 23
Time, see Clock
Time Delay,
compressor lockout,
22
cycles per hour,
22
1st to 2nd stage,
23
2nd to 3rd stage,
23
3rd to 4th stage,
23
Time Schedule, see
Program
Page 42
Page 51
Index
UV Light
resetting, 19
runtime, see Runtime
setting, see Runtime
Vacation,
button, see Buttons
mode, 17
programming, 17
setpoints,17
Venting, 30
W3, see Jumpers
Warranty, 44
Y2, see Jumpers
Page 43
Page 52
Warranty
Five-Year Warranty - This Product is warranted to be free from defects in material and
workmanship. If it appears within five years from the date of original installation, whether or not
actual use begins on that date, that the product does not meet this warranty, a new or
remanufactured part, at the manufacturer’s sole option to replace any defective part, will be
provided without charge for the part itself provided the defective part is returned to the distributor
through a qualified servicing dealer.
THIS WARRANTY DOES NOT INCLUDE LABOR OR OTHER COSTS incurred for diagnosing, repairing,
removing, installing, shipping, servicing or handling of either defective parts or replacement
parts. Such costs may be covered by a separate warranty provided by the installer.
THIS WARRANTY APPLIES ONLY TO PRODUCTS IN THEIR ORIGINAL INSTALLATION LOCATION AND
BECOMES VOID UPON REINSTALLATION.
LIMITATIONS OF WARRANTIES – ALL IMPLIED WARRANTIES (INCLUDING IMPLIED WARRANTIES OF
FITNESS FOR A PARTICULAR PURPOSE AND MERCHANTABILITY) ARE HEREBY LIMITED IN DURATION TO
THE PERIOD FOR WHICH THE LIMITED WARRANTY IS GIVEN. SOME STATES DO NOT ALLOW LIMITATIONS
ON HOW LONG AN IMPLIED WARRANTY LASTS, SO THE ABOVE MAY NOT APPLY TO YOU. THE
EXPRESSED WARRANTIES MADE IN THIS WARRANTY ARE EXCLUSIVE AND MAY NOT BE ALTERED,
ENLARGED, OR CHANGED BY ANY DISTRIBUTOR, DEALER, OR OTHER PERSON WHATSOEVER.
ALL WORK UNDER THE TERMS OF THIS WARRANTY SHALL BE PERFORMED DURING NORMAL WORKING
HOURS. ALL REPLACEMENT PARTS, WHETHER NEW OR REMANUFACTURED, ASSUME AS THEIR
WARRANTY PERIOD ONLY THE REMAINING TIME PERIOD OF THIS WARRANTY.
THE MANUFACTURER WILL NOT BE RESPONSIBLE FOR:
1. Normal maintenance as outlined in the installation and servicing instructions or owner’s
manual, including filter cleaning and/or replacement and lubrication.
2. Damage or repairs required as a consequence of faulty installation, misapplication, abuse,
improper servicing, unauthorized alteration or improper operation.
3. Failure to start due to voltage conditions, blown fuses, open circuit breakers or other
damages due to the inadequacy or interruption of electrical service.
4. Damage as a result of floods, winds, fires, lightning, accidents, corrosive environments or
other conditions beyond the control of the Manufacturer.
5. Parts not supplied or designated by the Manufacturer, or damages resulting from their use.
6. Manufacturer products installed outside the continental U.S.A., Alaska, Hawaii, and
Canada.
7. Electricity or fuel costs or increases in electricity or fuel costs for any reason whatsoever
including additional or unusual use of supplemental electric heat.
8. ANY SPECIAL INDIRECT OR CONSEQUENTIAL PROPERTY OR COMMERCIAL
DAMAGE OF ANY NATURE WHATSOEVER. Some states do not allow the exclusion of
incidental or consequential damages, so the above may not apply to you.
This warranty gives you specific legal rights and you may also have other rights which may vary
from state to state.
Page 44
Page 53
Notes:
Page 54
Notes:
Page 55
Page 56
Programming Worksheet see Page 20
DAY
M
O
N
D
A
Y
T
U
E
S
D
A
Y
W
E
D
N
E
S
D
A
Y
H
U
R
S
D
A
R
D
A
Y
S
A
T
U
R
D
A
Y
S
U
N
D
A
Y
T
Y
F
I
PERIOD
Morning
Day
Evening
Night
Morning
Day
Evening
Night
Morning
Day
Evening
Night
Morning
Day
Evening
Night
Morning
Day
Evening
Night
Morning
Day
Evening
Night
Morning
Day
Evening
Night
START TIME
COOL
HEAT
Copy Mon Tue
No
Yes
Copy Tue Wed
No
Yes
Copy Wed Thu
No
Yes
Copy Thu Fri
No
Yes
Copy Fri Sat
No
Yes
Copy Sat Sun
No
Yes
Printed on recycled paper.
P/N 88-802 Rev. 5
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