1 Source S1-THEU21P7S User manual

O w n e r ’s M a n u a l
O w n e r ’s M a n u a l
7 Day Programmable
7 Day Programmable
Gas Ele ctric or
Heat Pump
Gas Ele ctric or
Heat Pump
BACKLIT DISPLAY
Use with most
Heat Pump Systems:
1-Heat, 1-Cool
2-Heat, 1-Cool
Digital
Therm ostat
Digital
Therm ostat
System Powered
System Powered
Control up to 2-Heat & 1-Cool
Control up to 2-Heat & 1-Cool
Backlit Digital Display
Backlit Digital Display
Auxiliary Heat Indicator
Auxiliary Heat Indicator
Fahrenheit or Celsius
Fahrenheit or Celsius
Model
S1-THEU21P7S
MODE
HVAC SERVICE PARTSTM

Page 2
OWNER'S MANUAL
S1-THEU21P7S
Contents Page #
Time Period Programming
Advanced Setup
Overview
Daily Programming
Copying the Program
Normal Operation
Manual Operation
Page #
Warranty
Safety Warnings
Location of Controls
Display
Programmed Operation
Clock Set
Advanced Features
Factory Defaults
Calibration

CAUTION Follow Installation Instructions carefully.
DISCONNECT POWER TO THE HEATER -
AIR CONDITIONER BEFORE REMOVING
THE OLD THERMOSTAT AND INSTALLING
THE NEW THERMOSTAT.
WARNING
Page 3
Safety Warnings
OWNER'S MANUAL
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.
P/N S1-THEU21P7S
S1-THEU21P7S

COOL OFFHEAT
OFF
RUN
SET
PROGRAM
NEXT
ON
AUTO
FAN
Location of Controls
Page 4
COOLER &
WARMER
BUTTONS
PROGRAM BUTTON
Program OFF
RUN program
SET program
MODE BUTTON
Cool, Off, or Heat
NEXT
BUTTON
On or Auto
FAN BUTTON
OWNER'S MANUAL
S1-THEU21P7S

88
88
i8
:
88
AM
P M
M orni n g
Evenin g
SET
AUX
HEAT
C O
O
L
MTuWThF
SaSu
Day
Fan
On
Night
Page 5
Display
OWNER'S MANUAL
Clock Display.
Desired set temperature.
Current room temperature.
Indicates that 2nd stage of heat is energized. When 2nd
stage heat is energized, the Aux indicator will flash.
Indicates the Fan will run continuously.
Heat and Cool indicators. In normal operation, Heat or
Cool appears.
When heat or cool is energized, the Heat or Cool
indicator will flash.
Day of the week. Used for programming each of
the 7 days of the week.
Time period indicators. These indicate the part of
the program that is currently active, if the PROGRAM
button is set to RUN.
S1-THEU21P7S

COOL OFF HEAT
OFF
RUN
SET
PROGRAM
NEXT
ON
AUTO
FAN
Page 6
Normal Operation
COOLER & WARMER
BUTTONS
PROGRAM BUTTON
Program OFF
RUN program
SET program
MODE BUTTON
Cool, Off, or Heat
OWNER'S MANUAL
Manual Operation (Program set to OFF)
Select Cool or Heat with the MODE button.
Normally leave the fan set to Auto.
In Fan Auto, the fan will turn on only with a heat
or cool demand. When Fan On is selected, the
fan will run continuously.
Adjust the desired set temperature with the
COOLER and WARMER buttons.
NEXT
BUTTON
FAN
BUTTON
S1-THEU21P7S

COOL OFF HEAT
OFF
RUN
SET
PROGRAM
NEXT
ON
AUTO
FAN
Normal Operation
Page 7
OWNER'S MANUAL
Programmed Operation (Program set to RUN)
Select Cool or Heat with the MODE button.
Normally leave the fan switched to Auto.
When Fan On is selected, the fan will run
continuously.
The desired set temperature may be temporarily
overridden. The thermostat will revert to the
programmed settings in the following time period.
Select RUN with the PROGRAM button. Morning,
Day, Evening, or Night will appear on the display.
COOLER & WARMER
BUTTONS
PROGRAM BUTTON
MODE BUTTON
NEXT
BUTTON
FAN
BUTTON
Program OFF
RUN program
SET program
Cool, Off, or Heat
S1-THEU21P7S

OFF
RUN
SET
PROGRAM
Page 8
Clock Set
Use these buttons to
adjust the current time.
Use these buttons to
adjust the current day.
Press the PROGRAM button to enter the
clock and day setup screens.
Press NEXT
to advance
OWNER'S MANUAL
To slew the time more rapidly, push and hold the COOLER or
WARMER buttons.
This thermostat is preprogrammed from the
factory to operate 1 or 2-Stage equipment without
the need for further programming. To optimize the
installation of this thermostat follow the instructions
in the Advanced Setup section.
6
:
00
AM
Su
NEXT
6
:
00
AM
S1-THEU21P7S

Time Period Programming
PROGRAM BUTTON
Page 9
Overview
OWNER'S MANUAL
Press the PROGRAM button to enter the time
time period programming screens.
The blinking icon(s) on the display may be
changed by pressing the COOLER or
WARMER buttons.
After the blinking icon is changed to the desired
selection, press the NEXT button.
Each item in the time period programming screens will flash
and can be modified with the COOLER & WARMER buttons.
Continue the steps above until programming is complete.
Press the PROGRAM button twice to exit the programming
screens and operate the thermostat according to the time
period programming.
Press the PROGRAM button once to exit the programming
screens and operate the thermostat as a manual heat or cool
only thermostat.
OFF
RUN
SET
PROGRAM
S1-THEU21P7S

Page 10
Next Page
Time Period Programming
M
AM Morning
6:00
:
Press NEXT
to advance
Press NEXT
to advance
Press NEXT
to advance
OWNER'S MANUAL
Press the PROGRAM button to enter the time
period programming screens. Press the NEXT
button to advance past the Clock and Day setup
screens (page 9).
Use these buttons to
adjust the start time for
the morning time period.
Use these buttons to
adjust the cool setpoint for
the morning time period.
Use these buttons to
adjust the heat setpoint for
the morning time period.
Press NEXT
to advance Use these buttons to
select the day of the
week to be programmed.
M
6
:
00
AM
M orni n g
M
78
6
:
00
AM
M orni n g
SET
C O
O
L
M
70
6
:
00
AM
M orni n g
SET
HEAT
M
OFF
RUN
SET
PROGRAM
NEXT
NEXT
NEXT
NEXT
S1-THEU21P7S

Page 11
Next Page
Time Period Programming
Press NEXT
to advance
Press NEXT
to advance
Press NEXT
to advance
Press NEXT
to advance
OWNER'S MANUAL
Use these buttons to
adjust the cool setpoint for
the day time period.
Use these buttons to
adjust the heat setpoint for
the day time period.
Use these buttons to
adjust the start time for
the evening time period.
Use these buttons to
adjust the cool setpoint for
the evening time period.
Press NEXT
to advance Use these buttons to
adjust the start time for
the day time period.
8
:
00
AM
M
Day
62
8
:
00
AM
SET
HEAT
M
Day
85
8
:
00
AM
SET
C O
O
L
M
Day
6
:
00
P M
Evenin g
M
78
6
:
00
P M
Evenin g
SET
C O
O
L
M
NEXT
NEXT
NEXT
NEXT
NEXT
S1-THEU21P7S

Page 12
Next Page
Time Period Programming
Press NEXT
to advance
Press NEXT
to advance
Press NEXT
to advance
Press NEXT
to advance
OWNER'S MANUAL
Use these buttons to
adjust the heat setpoint for
the evening time period.
Use these buttons to
adjust the start time for
the night time period.
Use these buttons to
adjust the cool setpoint for
the night time period.
Use these buttons to
adjust the heat setpoint for
the night time period.
88
70
6
:
00
P M
Evenin g
SET
HEAT
M
i0
:
00
P M
M
Night
82
i0
:
00
P M
SET
C O
O
L
M
Night
62
i0
:
00
P M
SET
HEAT
M
Night
NEXT
NEXT
NEXT
NEXT
S1-THEU21P7S

Tu
Page 13
Copying the Program
Time Period Programming
OWNER'S MANUAL
Select Yes to copy
the previous day’s
program to the day
displayed.
The copy command becomes available after
programming the entire previous day.
If Yes is selected: If No is selected:
If No is selected, as in previous steps, flashing prompts for
input will appear for the four time periods for the next day.
After programming for all seven days is
complete, press the PROGRAM button to
leave the Setup screens. If no buttons are
pressed, the display will leave the setup
screens after 60 seconds.
Selecting Yes, then pressing NEXT
will copy the previous day’s program.
If yes is selected again, or each time,
this routine will repeat.
Press
Press
NEXT
NEXT
OFF
RUN
SET
PROGRAM
S1-THEU21P7S

Page 14
Time Period Programming
OWNER'S MANUAL
After you have completed setting the time
period programming, you have two options:
1) Run the time period program by pressing
the PROGRAM button two times.
Or,
2) Do not run the time period program by
pressing the PROGRAM button one time.
The thermostat will operate as a manual
heat or cool thermostat.
OFF
RUN
SET
PROGRAM
OFF
RUN
SET
PROGRAM
S1-THEU21P7S

Advanced Setup
This is normally done by the installer at initial installation.
Press NEXT
to advance
Press NEXT
to advance
Press NEXT
to advance
Page 15
Press NEXT
to advance
OWNER'S MANUAL
Use these buttons to
adjust the Cycles Per Hour
from 2 to 6.
d=no limit (zoning)
d1=d+no compressor
lockout (page 17).
Select backlight operation
when a button is pressed:
OFF: Light for 8 seconds after
a button press.
ON: Light continuously.
Use these buttons to select
thermostat operation in
degrees F or C.
Use these buttons to
adjust the deadband
from 1 to 6 degrees
(page 17).
Press the PROGRAM button to enter the Advanced Setup.
When the clock is flashing, press the NEXT button for
5 seconds. Do not release the button until this screen
appears.
Press NEXT
to advance ON = Heat Pump
operation
OFF = Gas Electric
operation
6
NEXT
NEXT
NEXT
NEXT
NEXT
S1-THEU21P7S

Page 16
OWNER'S MANUAL
About Advanced Features & Operation
CYCLES PER HOUR - The Cycles Per Hour setting
(page 16) monitors 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 temporarily overridden
by pressing the WARMER or COOLER button.
TWO STAGE OPERATION - The 2nd stage of heat
(auxiliary heat) is turned on when the room temp-
erature is equal to or less than: the setpoint minus
the 1st stage deadband (one degree, adjustable),
minus the 2nd stage deadband (two degrees, non-
adjustable).
Heat or Cool
Setpoint
Deadband Deadband
db 1db 2 (adj. 1-6 )
1st Stage
turn on
2nd Stage
turn on
Heating
(non-adj. 2 )
Deadband
db 1
(adj. 1-6 )
1st Stage
turn on
Cooling
Press NEXT
to advance
Press NEXT
to advance
Press the PROGRAM button to exit Advanced Setup.
Indicates that the ther-
mostat jumper is set for
an Oreversing valve
(energize in cooling) or
a breversing valve
(energize in heating).
ON indicates that the
thermostat jumper is
set for Electric Heat
operation, or OFF for
Gas/Electric or Heat
Pump operation.
0
NEXT
NEXT
S1-THEU21P7S

Factory Default
Press NEXT
to advance
Page 17
CAUTION
OWNER'S MANUAL
If, for any reason, you desire to return all the stored settings
back to the factory default settings, follow the instructions below.
When the Cycles Per Hour is
flashing, press and hold the NEXT
button until this screen appears.
Press and hold the
NEXT button again
until this screen appears.
After restoring factory
defaults, the thermo-
stat screen will display
all icons.
Press the PROGRAM button to
return to normal operation.
Enter advanced setup by setting the PROGRAM button to
SET. When the clock is flashing, press the NEXT button for
5 seconds. Do not release the button until this screen
appears.
88
88
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:
88
AM
P M
M orni n g
Evenin g
SET
AUX
HEAT
C O
O
L
MTuWThF
SaSu
Day
Fan
On
Night
88
88
i8
:
88
AM
P M
M orni n g
Evenin g
SET
AUX
HEAT
C O
O
L
MTuWThF
SaSu
Day
Fan
On
Night
NEXT
OFF
RUN
SET
PROGRAM
6
S1-THEU21P7S

Calibration
Press NEXT
to advance
Page 18
CAUTION
Under normal circumstances it will not be necessary to adjust
the calibration of the temperature sensor. If calibration is
required, please contact a trained HVAC technician to
correctly perform the following procedure.
OWNER'S MANUAL
Press the NEXT button twice
to advance to the calibration
screen.
Press NEXT
two times
to advance
Adjust the temperature
reading using the WARMER
and COOLER buttons then
press the NEXT button to
store the new value.
Press NEXT
to store the
new value
When the Cycles Per Hour is
flashing, press and hold the NEXT
button until this screen appears.
Enter advanced setup by setting the PROGRAM button to
SET. When the clock is flashing, press the NEXT button for
5 seconds. Do not release the button until this screen
appears.
78
NEXT
NEXT
NEXT
88
88
i8
:
88
AM
P M
M orni n g
Evenin g
SET
AUX
HEAT
C O
O
L
MTuWThF
SaSu
Day
Fan
On
Night
6
S1-THEU21P7S

Page 19
OWNER'S MANUAL
Warranty
One-Year Warranty - This Product is warranted to be free from defects in material and
workmanship. If it appears within one year 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.
S1-THEU21P7S

F
R
I
D
A
Y
T
U
R
A
S
D
A
Y
Morning
Morning
Day
Day
Evening
Evening
Night
Night
Copy Fri Sat
No
Yes
Copy Tue Wed
No
Yes
Copy Thu Fri
No
Yes
S
U
N
D
A
Y
Morning
Day
Evening
Night
Copy Sat Sun
No
Yes
Copy Wed Thu
W
E
N
E
S
D
D
A
Y
T
U
R
H
S
D
A
Y
Morning
Morning
Day
Day
Evening
Evening
Night
Night
No
Yes
DAY PERIOD HEAT
START TIME COOL
Copy Mon Tue
M
O
N
D
A
Y
T
U
E
S
D
A
Y
Morning
Morning
Day
Day
Evening
Evening
Night
Night
No
Yes
Programming Worksheet see Page 10
Printed on recycled paper.
P/N 88-589 Rev. 1