1F85-277
Heating & Air Conditioning
7 Day/5-1-1 Programmable/Non-programmable, Auto
Changeover, Multi-Stage/Heat Pump Thermostat
INSTALLATION INSTRUCTIONS
Operator: Save these instructions for future use!
FAILURETOREADANDFOLLOWALLINSTRUCTIONSCAREFULLYBEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.
PREPARATIONS
YOUR THERMOSTAT REPLACES
Description
Assemble tools required as shown below.
1F85-277
Yes
Heat Pump (No Aux. or Emergency Heat)
Heat Pump (with Aux. or Emergency Heat)
Standard Heat & Cooling Systems
Two Stage Heat & Two Stage Cool
Standard Heat Only Systems
Yes
Yes
Yes
FLAT BLADE SCREWDRIVER
WIRE CUTTER/STRIPPER
Yes
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED
Millivolt Heat Only Systems – Floor or Wall Furnaces
Standard Central Air Conditioning
Gas or Oil Heat
Yes
Yes
Yes
Electric Furnace
Yes
Hydronic (Hot Water) Zone Heat – 2 Wires
Hydronic (Hot Water) Zone Heat – 3 Wires
Yes
No
REMOVINGOLDTHERMOSTAT
CAUTION
!
To prevent electrical shock and/or equipment dam-
age, disconnect electric power to system at main fuse
or circuit breaker box until installation is complete.
Before removing wires from old thermostat's switching sub-
base, label each wire with the terminal designation it was
removed from.
Y2
C
R
E/W1
Y1
1. Shut off electricity at the main fuse box until installation is
complete. Ensure that electrical power is disconnected.
O
B
L
W2
G
Mounting
Hole
Mounting
Hole
ELEC.
ON
GAS
2. Remove Old Thermostat: A standard heat/cool
thermostat consists of three basic parts:
a. The cover, which may be either a snap-on or
hinge type.
Elec-Gas
Switch
AUTO
b. The base, which is removed by loosening all
captive screws.
Figure 1 – Thermostat base
c. The switching subbase, which is removed by
unscrewing the mounting screws that hold it on
the wall or adaptor plate.
ATTENTION! This product does not contain mercury. How-
ever, this product may replace a unit which contains mercury.
3. Remove the front cover of the old thermostat. With
wires still attached, remove wall plate from the wall. If
the old thermostat has a wall mounting plate, remove the
thermostat and the wall mounting plate as an assembly.
Do not open mercury cells. If a cell becomes damaged, do not
touch any spilled mercury. Wearing non-absorbent gloves,
clean up the spilled mercury and place into a container which
can be sealed. If a cell becomes damaged, the unit should be
discarded.
4. Identify each wire attached to the old thermostat.
5. Disconnect the wires from the old thermostat one at a
time. DO NOT LET WIRES FALL BACK INTO THE
WALL.
Mercury must not be discarded in household trash. When the
unit this product is replacing is to be discarded, place in a
suitablecontainerandreturntoWhite-Rodgersat2895Harrison
Street, Batesville, AR 72501 for proper disposal.
6. Install new thermostat using the following procedures.
White-Rodgers is a division
of Emerson Electric Co.
PART NO. 37-6560A
0430
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WIRINGDIAGRAMS
NOTE
Polarity must be observed. If the HOT side of the second transformer
is jumpered to the COMMON side of the first transformer a short will
be made. Damage to equipment will occur when power is restored.
E/W1
THERMOSTAT
SYSTEM
*
O
B
Y2
Y1
G
W2
C
L
R
Limit or
Safety
Switches
Limit or
Safety
Switches
HOT
Reversing
Valve
Energized in
Heat, Off,
Emergency
Mode
24 VAC
120 VAC
Emergency
Heat
Relay
SYSTEM
MONITOR
SWITCH
Reversing
Valve
Energized in
Cool Mode
2nd Stage
Compressor
Fan
Relay
NEUTRAL
24 VAC
Auxiliary
Heating
Transformer
(Class II
NOTE
ACCESSORY
RELAY N.O.
CONTACT
Aux
Heat
Relay
The accessory relay scheme
is required when safety
circuits exist in both systems.
Compressor
Contactor
Current Limited)
COMMON
TWO COMMONS MUST
BE JUMPERED TOGETHER!
Limit or
Limit or
Safety
Switches
Safety
HOT
Switches
24 VAC
120 VAC
COMMON
NEUTRAL
Heat Pump Transformer
(Class II Current Limited)
Figure 4. Typical wiring diagram for two transformer heat pump systems with safety circuits in BOTH systems
*The 24 volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” Energizer® alkalinebatteries.
Heat Pump Terminal Outputs
Refer to equipment manufacturers' instructions for specific one transformer. If transformer safety circuits are in only one of
system wiring information.
the systems, remove the transformer of the system with NO
safety circuits. If required, replace remaining transformer with
a 75VA Class II transformer. After disconnecting one trans-
former, the two commons must be jumpered together.
You can configure the thermostat for use with the following
heat pump system types:
HEAT PUMP TYPE 1. Single stage compressor system; gas
or electric backup.
Use the terminal output information below to help you wire the
thermostatproperlyforyourheatpumpsystem. Afterwiring, see
CONFIGURATIONsectionforproperthermostatconfiguration.
This thermostat is designed to operate a single-transformer
system. If you have a two-transformer system, cut and tape off
THERMOSTAT TERMINALS (HEAT PUMP)
W2 E/W1 Y2 Y1
SYSTEM
Heat
L
C*
R
G
O
B
Malfunction 24 Volt 24 Volt HP 1 and Emergency
No
Heat and Blower/Fan Energized Energized Energized
Pump 1
Light (Common) (Hot) Emergency Mode
Output Cool mode
1st stage
on call for Heat
and Cool
in Cool
Mode
in Heat
OFF
Emergency
mode
2nd stage 1st stage
HP 2
3rd stage
Heat
Pump 2
2nd
stage
(compressor) Set GAS/ELEC switch
for Emergency mode
compressor
*The 24 volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” Energizer® alkalinebatteries.
E/W1
THERMOSTAT
*
Y2
W2
C
R
B
Y1
G
O
SYSTEM
Heat
Relay
Compressor
Contactor
Stage 2
Reversing
Valve
Reversing
Valve
Stage 1
Hot
Energized in
Heat Mode
Off Emergency
24 VAC
120 VAC
Neutral
Energized in
Cool Mode
Compressor
Contactor
Stage 1
Heat
Relay
Fan
Relay
TRANSFORMER
(Class II, Current Limited)
Stage 2
Figure 5. Typical wiring diagram for single transformer multi-stage systems
*The 24 volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” Energizer® alkalinebatteries.
3
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Multi-Stage Terminal Outputs
Refer to equipment manufacturers' instructions for specific one transformer. If transformer safety circuits are in only one of
system wiring information.
the systems, remove the transformer of the system with NO
safety circuits. If required, replace remaining transformer with
a 75VA Class II transformer. After disconnecting one trans-
former, the two commons must be jumpered together.
You can configure the thermostat for use with either multi-stage
electric heat systems or multi-stage gas systems. When con-
figured for electric heat, the G terminal (blower/fan) will be
energized on a call for heat.
Use the terminal output information below to help you wire the
thermostat properly for your multi-stage system. After wiring,
see CONFIGURATION section for proper thermostat configu-
ration.
This thermostat is designed to operate a single-transformer
system. If you have a two-transformer system, cut and tape off
THERMOSTAT TERMINALS (MULTI-STAGE)
W2 E/W1 Y2 Y1
SYSTEM
L
C*
R
G
O
B
Multi-stage Malfunction 24 Volt 24 Volt HeatMode Heatmode CoolMode CoolMode Blower/FanEnergized Energized Energized
Light
(Common) (Hot) 2ndstage 1st stage 2ndstage 1st stage
on call for Cool (and
Heat if configured
to Electric Heat)
in Cool in Heat, Off,
Mode
Emergency
Modes
*The 24 volt neutral connection to terminal C on the thermostat is not required if you replace the batteries once a year with fresh “AA” Energizer® alkalinebatteries.
CHECKTHERMOSTATOPERATION
Emergency System
NOTE
EMER bypasses the Heat Pump to use the heat source wired
to terminal E on the thermostat. EMER is typically used when
compressor operation is not desired, or you prefer back-up
heat only.
To prevent static discharge problems, touch side of
thermostat to release static build-up before touching
any keys.
1. Press SYSTEM button to select EMER. “EMER” will flash
on the display.
If at any time during testing your system does not operate
properly, contact a qualified serviceperson.
2. Press
to adjust thermostat setting above room
temperature. The Aux. heating system will begin to
operate. The display will show “STG1” flashing “EMER”
Fan Operation
If your system does not have a G terminal connection, skip to
Heating System.
and Flame icon ( ) to indicate that the Aux. system is
operating.
3. Adjust temperature setting to 3° above room temperature.
The auxiliary heat system should begin to operate and the
display should show “STG1+2”.
1. Turn on power to system.
2. Move FAN switch to ON position. The blower should begin
to operate.
3. Move FAN switch to AUTO position. The blower should
stop immediately.
4. Press
to adjust the thermostat below room tempera-
ture. The Aux. heating system should stop operating.
CAUTION
!
CAUTION
To prevent compressor and/or property damage, if
the outdoor temperature is below 50°F, DO NOT
operate the cooling system.
!
Do not allow the compressor to run unless the com-
pressor oil heaters have been operational for 6 hours
and the system has not been operational for at least
5 minutes.
Cooling System
Heating System
1. Press SYSTEM button to select the Snowflake icon ( ).
1. Press SYSTEM button to select the Flame icon ( ). If
the auxiliary heating system has a standing pilot, be sure
to light it.
2. Press
to adjust thermostat setting below room
temperature. The blower should come on immediately on
high speed, followed by cold air circulation. The display
should show “STG1”.
2. Press
to adjust thermostat setting to 1° above room
3. Adjust temperature setting to 3° below room temperature.
The second stage cooling should begin to operate and
the display should show “STG1+2”.
temperature. The heating system should begin to
operate. The display should show “STG1”. However, if the
setpoint temperature display is flashing, the compressor
lockout feature is operating (see Configuration menu,
item 5).
4. Press
to adjust the temperature setting above room
temperature. The cooling system should stop operating.
3. Adjust temperature setting to 3° above room temperature.
If your system configuration is set at MS2, HP2 or HP1,
the auxiliary heat system should begin to operate and the
display should show “STG1+2”.
4. Press
to adjust the thermostat below room tempera-
ture. The heating system should stop operating.
4
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OPERATION
Before you begin programming your thermostat, you should be
familiar with its features and with the display and the location
and operation of the thermostat buttons. Your thermostat
consists of two parts: the thermostat cover and the base. To
remove the cover, pull it straight out from the base. To replace
the cover, line up the cover with the base and press until the
cover snaps onto the base.
The Thermostat Buttons and Switches
Raises temperature setting
Lowers temperature setting.
TIME button.
1
2
3
4
5
6
7
8
PRGM (program) button.
RUN (run program) button.
HOLD temperature button.
FAN switch (ON, AUTO)
SYSTEM button (COOL, AUTO, HEAT, EMER, OFF)
The Display
Figure 6 – Thermostat display, buttons and switches
Indicates day of the week.
9
Flame icon ( ) is displayed when the system is in
HEAT mode. Snowflake icon ( ) is displayed when
10
Display ( ) when in keypad lockout mode.
16
17
“EMER” is displayed flashing when the system is in
EMER mode.
the system is in COOL mode. Flame icon ( ) and
Snowflake icon ( ) are displayed simultaneously
when thermostat is in AUTO mode.
The word “FAULT” will be displayed when there is a
malfunction in the HEAT/COOL system.
18
19
Displays “BATT” when the 2 "AA" batteries are low and
should be replaced. Only “BATT” and “LO” in the
minutes field are displayed when batteries are low and
with no system power.
11
Display ( ) when limited HEAT/COOL range is activated.
The “ ” icon will flash if an attempt is made to adjust
the temperature beyond the limited HEAT/COOL
temperature range.
Alternately displays current time and temperature. Dis-
plays “LO” in the minutes field when batteries are low.
12
13
Stage1 & 2 indicators: The thermostat shall indicate
when the first and second stage is energized except
in emergency mode. The icon is “STG 1” for the first
stage energized. The icons for the first and second
stage energized are “STG1+2” located in the upper
right side of the display.
20
The word “HOLD” is displayed when the thermostat is
in the HOLD mode. “HOLD” is displayed flashing
when the thermostat is in a temporary HOLD mode.
Displays currently programmed set temperature (this
is blank when SYSTEM is OFF).
14
15
Displays “FLTR” when the system has run for the
programmed filter time period as a reminder to change
or clean your filter.
CONFIGURATION MENU
The configuration menu allows you to set certain thermostat 1) Single Stage, Multi-stage or Heat Pump System
Configuration – This control can be configured for Heat
Pump or two stage heat/two stage cool multi-stage opera-
tion. The display indicates “MS 2” (default for multi-stage
mode) in the display. The Multi-stage configuration can be
operating characteristics to your system or personal require-
ments.
Set SYSTEM button to OFF, then simultaneously press
and
to enter configuration menu. The display will
toggled to “SS1”, “HP2”, or “HP1” by pressing the
or
show the first item in the configuration menu.
key. In Multi-stage configuration, SYSTEM button will
not have EMERgency mode.
The configuration menu table summarizes the configuration
options. An explanation of each option follows.
2) Programs Per Week – This control can be configured for 7
independent day or 5/1/1/ programming or non-program-
mable mode. The display indicates “7d” as default. The
programs per week can be toggled to “5d” or “0d” by
Press SYSTEM to change to the next menu item. To exit the
menuandreturntotheprogramoperation,pressRUN.Ifnokeys
are pressed within fifteen minutes, the thermostat will revert to
normal operation.
pressing the
or
keys. With “0d” selected for non-
5
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Press the SYSTEM button until
O
F
F
is displayed, then press the
and
simultaneously
Comments
CONFIGURATION MENU
INSTALLER/CONFIGURATIONMENU
Press
Displayed
Press
or
Step
1
Button(s) (Factory Default)
to select
System
MS 2
SS1, HP2, HP1
Selects Single stage, Multi-stage, or Heat Pump
(Single stage or 2-stage) System Configuration
2
3
System
System
7d
5d, 0d
PRG 2
Selects Programs Per Week
PRG 4
Selects Programmable Periods (PRG 2 = 2
programmable periods; PRG 4 = 4 programmable periods)
4
5
System
System
4:00 HOLD
0:15 to 4:00
Selects Temporary Program Override Time
(increments of 15 minutes)
EMR
(ON)
OFF
Selects Energy Management Recovery OFF or ON
6
7
System
System
FA
SL
Selects Fast or Slow Cycle Selection
CL
CL
Selects Compressor Lockout CL OFF or ON
(OFF)
(ON)
8
9
System
System
CDL
(ON)
CDL
(OFF)
Selects Backlight Display
FA
FA
Selects Fast Second Stage ON or OFF
(ON)
(OFF)
10
11
System
System
0 FLTR
50-1950 (increments of 50)
4 LO to 4 HI
Selects filter replacement run time
0°F
Selects Temperature Display Adjustment 4 LO to 4 HI
(Room Temperature)
12
13
14
System
System
System
°F
°C
OFF
Selects temperature display F° or °C selection
Selects AUTO Mode ON or OFF
AU On
LR
LR 62 to LR89
Selects Limited HEAT range
(90)
15
16
17
18
19
System
System
System
System
Run
LR
(45)
LR 46 to LR 82
Selects Limited COOL range
Feature Not Available
CA
(OFF)
CA
(ON)
(ON)
Selects Keypad Lockout
(OFF)
0
001 to 999
Selects Keypad lockout combination number
Press System to set code
Returns to the OFF position
Example:
programmable, SYSTEM button selection will skip
Programmable periods (item 3), programmable hold time
(item 4) and EMR (item 5).
1. You have selected 3:00 hours for the Temporary Pro-
gram Override time period.
3) Programmable Periods – This control can be configured
for 4 or 2 programmable periods. The display indicates
“PRG 4” in the display as default. The programmable
periods can be toggled to “PRG 2” by pressing the
2. With the thermostat set to Heat or Cool, press
or
to set the temperature to your preference.
The thermostat will maintain this temperature setting for
3 hours with “HOLD” blinking to remind you it is in
Temporary Hold. After 3 hours, the thermostat will go
back to the program temperature and “HOLD” will no
longer blink or display.
or
keys.
4) Select Temporary Program Override Time – The thermo-
stat can hold any temperature you set it to for the amount
of time you select on this option. Your choices are 0:15 to
4:00 hours in 15 minute increments.
6
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CONFIGURATIONMENU
5) Select Energy Management Recovery OFF or ON – 12)Select F° or C° Readout – Changes the display readout to
Energy Management Recovery (EMR) causes the thermo-
stat to start heating or cooling early to make the building
temperature reach the program setpoint at the time you
specify. Heating will start 5 minutes early for every 1°
of temperature required to reach setpoint. Cooling allows
more time per degree because it takes longer to reach
temperature.
Centigrade or Fahrenheit as required.
13)Selected Auto mode – This control will feature AUTO
changeover mode when AU on is selected (default). Press
the
or
keys in the menu mode to defeat the auto
changeover mode (OFF).
14)Limited Heat Range – This feature provides a maximum
setpoint temperature for heat. The default setting is 90°F. It
can be changed between 62°F and 89°F by pressing the
Example: You select EMR and have your heating program-
med to 65° at night and 70° at 7 AM. If the building temp-
erature is 65° the difference between 65° and 70° is 5°.
Allowing 5 minutes per degree the thermostat setpoint will
change to 70° at 6:35 AM.
or
key.
15)Limited Cool Range – This feature provides a minimum
setpoint temperature for cool. The default setting is 45°F. It
can be changed between 46°F and 82°F by pressing the
6) Fast or Slow Cycle Selection – The factory default setting
is fast cycle, which cycles 1st stage at approximately 1.2°F
and 2nd stage 0.75°F. If you prefer slow cycle, press the
or
key.
16)Compressor Defeat on Comfort Alert error – By selecting
CAL on (default), the compressor will be locked when any
CA error is detected. The compressor will not be locked
when CA error is detected if CAL is OFF.
or
key to change to SL. The 1st stage and 2nd
stage would be 1.5°F and 1.2°F respectively.
7) Select Compressor Lockout CL OFF or ON – Selecting
CL ON will cause the thermostat to wait 5 minutes before
turning on the compressor if the heating and cooling system
loses power. It will also wait 5 minutes minimum between
cooling and heating cycles. This is intended to help protect
the compressor from short cycling. Some newer compres-
sors already have a time delay built in and do not require
this feature. Your compressor manufacturer can tell you if
the lockout feature is already present in their system. When
the thermostat compressor time delay occurs it will flash the
setpoint for about five minutes.
17 & 18) Keypad Lockout – This menu selection will display
lock icon ( ) and “OFF” (default, keypad not locked out).
The
and areusedtotoggletheselectionbetweenOFF
and ON (keypad locked out). When the keypad lockout
selection is enabled (ON), and the SYSTEM button is
pressed again, the display will indicate the number “0”
(default, still disabled) in the time digits. The
and
are
used to set the combination number from 0 to 999. If a
combination of 0is selected and the SYSTEM button is
pressed, the menu will be exited and keypad will not be
locked. If 1 to 999 is selected and the SYSTEM button is
pressed, the combination is stored into memory and the
menu is exited. The ( ) will display designating keypad
locked with a valid combination. The SYSTEM button will
operatefor10secondsafterthemenumodeisexitedtoallow
the user to change the mode from OFF to the desired
SYSTEM mode.
8) Select Backlight Display – The display backlight improves
display contrast in low lighting conditions. When the C
terminal is powered, selecting backlight CdL ON will turn
the light on continuously. Select backlight OFF will keep
the light on momentarily after any key is pressed. When the
C terminal is not powered, this selection has no effect.
9) Select (Fast) Second Stage ON or OFF – In the run mode,
if the setpoint temperature is manually raised by 3°F (2°C)
or more above the actual temperature with the , and the
fast second stage feature is enabled, FA ON, the second
stage will energize immediately. With FA OFF, second
stage will not energize until the setpoint temperature is 1°F
or more above actual temperature for more than ten min-
utes.
While the keypad is locked out, a simultaneous press of
and
will enter the configuration menu from any
mode instead of only OFF mode. When the menu is
entered with the keypad lockout feature enabled, the first
menu item displayed is the combination code 0. The
or
keys are used to set the combination unlock number
from 0 to 999. If the unlock number matches exactly with
the combination lock number stored in memory when the
SYSTEM button is pressed, the keypad is unlocked and
the ( ) is removed. If the unlock number does not match
when the SYSTEM button is pressed, the menu is exited
and the keypad remains disabled.
10)Select filter replacement run time – The thermostat will
display FLTR after a set time of operation. This is a remind-
er to change or clean your air filter. This time can be set from
0 to 1950 hours in 50 hour increments. A selection of 000
will cancel this feature. When “FLTR” is displayed, you
can clear it by pressing HOLD and RUN at the same time.
This resets the timer and starts counting the hours until the
next filter change. Contact your system manufacturer for a
specific replacement/maintenance interval.
To reset the combination code and unlock the keypad if
the code is forgotten, see troubleshooting section.
11)Select Temperature Display Adjustment 4 LO to 4 HI –
Allows you to adjust the room temperature display up to 4°
higher or lower. Your thermostat was accurately calibrated
at the factory but you have the option to change the display
temperature to match your previous thermostat. The cur-
rent or adjusted room temperature will be displayed on the
left side of the display.
7
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SPECIFICATIONS
ELECTRICAL DATA
THERMAL DATA
Electrical Rating:
Setpoint Temperature Range:
45°F to 90°F (7°C to 32°C)
Operating Ambient Temperature Range:
32°F to 105°F
20 to 30 VAC 50/60 Hz or DC
0.05 to 1.5 Amps (Load per terminal)
2.5 Amps Maximum Total Load (All terminals combined)
Operating Humidity Range:
0 to 90% RH (non-condensing)
Shipping Temperature Range:
-40°F to 150°F
OPERATION
Manual Operation
Permanent Program Override (HOLD) – With the SYSTEM
button set to HEAT or COOL, press the HOLD button once and
Thesystem"mode"isselectedbypressingtheSYSTEMbutton.
Icons on the bottom right corner of the display will indicate the
mode: COOL ( ), AUTO (
), HEAT ( ), EMER, or OFF. In
any mode except OFF, the setpoint temperature will be shown
on the right side of the display. In OFF, this area will be blank.
The current temperature will be displayed on the left side of the
display.
release. “HOLD” will be displayed. Use
or
to adjust the
temperature. The thermostat will hold the room temperature at
the selected setting until you press RUN button to start program
operation again.
To operate properly in the AUTO mode, the heat setpoint
temperature cannot be the same as or higher than the cool
setpoint temperature. The heat setpoint must be at least 1°
lower than the cool setpoint.
Temperature Program Override – Press
or
until the
display shows the temperature you want. The thermostat will
override current programming and keep the room temperature
at the selected temperature for a programmed time period.
“HOLD” will be displayed and flashing. The thermostat will
automatically revert to the program after programmed period.
Automatic System Changeover
• LOW BATTERY INDICATOR — If the 2 “AA” alkaline batter-
ies are low and should be replaced, the display will be blank
except for “LO BATT”. When the batteries are low, pressing
any button will cause the display to operated for ten seconds.
After ten seconds, the display will be blank except for “LO
BATT”. You cannot program with low batteries, but you can
override setpoint temperature. After “LO BATT” has been
displayed for 4 weeks, the thermostat will raise the tempera-
ture 10 degrees above your setpoint on COOL mode and will
drop the temperature 10 degrees below your setpoint on
HEAT mode. If the “LO BATT” condition continues, and
when it reaches certain value, the thermostat will turn off all
the loads and “LO BATT” will flash.
When the thermostat is in the AUTO mode, both the Flame and
Snowflake icons are displayed. The thermostat will call for heat
or cool depending on the room temperature. The setpoint
temperature displayed will be that of the last mode called. If the
lastsystemcyclewasheat, the HEAT setpointwillbedisplayed.
IftheroomtemperatureraisesabovetheHEAT setpointandthe
COOL setpoint and a call for cool is required, the temperature
displayed will change to be the COOL setpoint.
Second Stage Time Delay
Your thermostat is designed to determine the optimum time to
activate the second stage. Simply raising the temperature in
heating or lowering it in cooling will not always force the
thermostat to bring the second stage on quickly. There is a time
delay from 0-30 minutes depending on the performance of the
first stage of the system.
• SIMPLIFIED COPY DAY FUNCTION — This feature allows
Monday’s program to be copied into the rest of the week’s
programming. This feature is available the first time you
programmed your thermostat. To use this feature, simply
enter the program for Monday as described in ENTERING
YOUR PROGRAM, then press RUN or HOLD. The only way
to restore this feature is to complete a software reset (see
Reset Operation under TROUBLESHOOTING section).
EXAMPLE: For the last 2 hours the thermostat is set on 70° and
the room temperature is 70° with the equipment using only the
first stage of heat. Since the equipment is keeping the tempera-
ture within 1° of setpoint, the thermostat will delay second stage
for a longer time if you manually raise the temperature or if the
room temperature quickly changes. Once the second stage
comes on, it will come on sooner the next time there is a
difference between the setpoint and the room temperature. The
net effect of the staging program is that when the first stage is
capable of making temperature the second stage will delay
longer. When the thermostat calculates that first stage cannot
make temperature in a reasonable time, the second stage will
come on sooner. This built in function automatically optimizes
the use of additional stages of heat or cool.
• COPY DAY FUNCTION — This feature allows
a selected day’s program to be copied to the desired day’s
programming. To use this feature: in PRGM mode, select the
day to be copied from by pressing the HOLD button. Enter the
program for the selected day as described in ENTERING
YOUR PROGRAM. Press and hold the TIME button for 4
seconds to begin the COPY mode. The LCD will display
“COPY” and the selected day to be copied. The day the
program will copy to will be flashing. Press the HOLD button
to select the day you want to copy to. Press TIME to complete
the Copy Day operation and return to PRGM mode. Press
RUN to exit.
8
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OPERATION
PROGRAMMINGYOURTHERMOSTAT
Entering Your Program
This section will help you plan your thermostat's program to Set Current Time and Day
meetyourneeds.Formaximumcomfortandefficiency,keepthe
1. Press TIME button once. The display will show the hour
only.
following guidelines in mind when planning your program.
• When heating (cooling) your building, program the temper-
atures to be cooler (warmer) when the building is vacant or
during periods of low activity.
PM
EXAMPLE:
• During early morning hours, the need for cooling is usually 2. Press and hold either
or
until you reach the
minimal.
correct hour and AM/PM designation (AM begins at mid-
night; PM begins at noon).
3. Press TIME once again. The display window will show
the minutes only.
Planning Your Program
Look at the factory preprogrammed times and temperatures
shown in the sample schedule. If this program will suit your
needs, simply press the RUN button to begin running the factory
preset program.
EXAMPLE:
If you want to change the preprogrammed times and tempera-
tures, follow these steps.
4. Press and hold either
correct minutes.
5. Press TIME once again. The display will show the day of
the week.
or
until you reach the
Determine the time periods and temperatures for your program.
You can program four or two periods for each day (see Configu-
rationmenu, item3). Youmayusethesameheatingandcooling
temperatures for consecutive time periods. You can choose
start times, heating temperatures, and cooling temperatures
independently (for example, you may select 5:00 AM and 70° as
the weekday 1st period heating start time and temperature and
also choose 7:00 AM and 76° as the weekday 1st period
cooling start time and temperature).
6. Press
week.
or
until you reach the current day of the
7. Press RUN once. The display will show the correct time
and room temperature alternately.
Enter Heating Program
1. Move the SYSTEM switch to HEAT.
Use the table to plan your program time periods and the
temperatures you want during each period. Fill in the complete
table to have a record of your programs.
2. Press PRGM once. “MO” (indicating Monday program)
will appear in the display. Also displayed are the currently
programmed start time for the 1st heating period and the
currently programmed temperature (flashing).
SAMPLE
Heating/Cooling Schedule Plan (Factory Program)
ALL DAYS OF THE WEEK
Start Time
6:00 AM
8:00 AM
5:00 PM
10:00 PM
6:00 AM
8:00 AM
5:00 PM
10:00 PM
Temperature
70 F
Period
1ST
EXAMPLE:
2ND
3RD
4TH
1ST
2ND
3RD
4TH
62 F
This display window shows that for Monday’s 1st heating
period, the start time is 6:00 AM, and 70° is the programmed
temperature (this example reflects factory preprogramming).
70 F
62 F
78 F
3. Press
or
to change the displayed temperature to
85 F
your selected temperature for Monday’s 1st heating
program period.
78 F
4. Press TIME once (the programmed time will flash). Press
82 F
or
until your selected start time for Monday’s 1st
Heating/Cooling Schedule Plan
PERIOD 2
PERIOD 1
HEAT
Time Temp
PERIOD 3
PERIOD 4
COOL
Time Temp
HEAT
Time Temp
COOL
Time Temp
HEAT
Time Temp
COOL
Time Temp
HEAT
Time Temp
COOL
Time Temp
Mon
Tues
Wed
Thur
Fri
Sat
Sun
9
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1. Press SYSTEM button to
C
O
O
L
position.
OPERATION
Enter Cooling Program
heating program period appears. The time will change in 15-
minute increments. When your selected time is displayed,
pressTIMEagaintoreturntothechangetemperaturemode.
CAUTION
!
If the outside temperature is below 50°F, disconnect
power to the cooling system before programming.
Energizing the air conditioner compressor during
cold weather may cause personal injury or property
damage.
5. Press PRGM once. The currently programmed start time
and setpoint temperature for the Monday’s 2nd heating
program period will appear.
6. Repeat steps 3 and 4 to select the start time and heating
temperature for Monday’s 2nd heating program period.
7. Repeat steps 3 through 5 for the 3rd and 4th heating
program periods. Monday heating programs are now
complete.
2. Follow Enter Heating Program for entering your cooling
program, using your selected cooling times and tempera-
tures.
NOTE
CHECKYOURPROGRAMMING
If you are programming your thermostat for the first time and you
want programming for all days of the week to be the same as
Monday’s program, press RUN or HOLD at this point, and
proceed to Enter Cooling Program. (This simplified COPY
DAY feature only works the first time you program your thermo-
stat. If you want to copy one day’s programming to a specific day
programming, refer to COPY DAY FUNCTION in OPERATING
FEATURES. If you are changing your thermostat’s program-
ming, you must program each day separately.)
Follow these steps to check your thermostat programming
one final time before beginning thermostat operation.
1. Press SYSTEM button to HEAT position.
2. Press PRGM to view the 1st Monday heating period
time and temperature. Each time you press PRGM, the
next heating period time and temperature will be display-
ed in sequence for each weekday, then Saturday and
Sunday program periods (you may change any time or
temperature during this procedure).
3. Press RUN.
8. Press PRGM once. “TU” (indicating Tuesday
program) will appear in the display, along with the
start time for the 1st heating period and the currently
programmed temperature.
4. Press SYSTEM button to COOL position.
5. Repeat step 2 to check cooling program.
6. Press SYSTEM button to HEAT or COOL and press
RUN to begin program operation.
NOTE: Batteries are not required to keep your programming
or menu data. With two optional "AA" batteries installed,
your thermostat will maintain time and continuously
display the temperature during a loss of AC power.
Installed batteries will also allow programming prior to
installation.
9. Repeat steps 3 through 7 to complete Tuesday’s
heating programming.
10.Continue entering each day’s programming until all
heating periods time and temperatures have been
entered.
11.When you have complete entering your heating
program, press RUN.
YOUR THERMOSTAT IS NOW PROGRAMMED AND READY TO
PROVIDEMAXIMUMCOMFORTANDEFFICIENCY!
TROUBLESHOOTING
Reset Operation
If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation, you can reset the thermo-
stat by removing the wires from terminals R and C and removing batteries for 2 minutes. After resetting the thermostat, replace
the wires and batteries. If the thermostat has been reset and still does not function correctly, contact your heating/cooling
service person or place of purchase.
Possible Cause
Corrective Action
Symptom
1. Blown fuse or tripped circuit breaker.
2. Furnace power switch to OFF.
Replace fuse or reset breaker.
Turn switch to ON.
No Heat/No Cool/No Fan
(common problems)
3. Furnace blower compartment door or
panel loose or not properly installed.
Replace door panel in proper position to engage
safety interlock or door switch.
1. Pilot light not lit.
Re-light pilot.
No Heat
2. SYSTEM button not set to HEAT.
Press SYSTEM button to HEAT and raise setpoint
above room temperature.
3. Loose connection to thermostat or
system.
Verify thermostat and system wires are securely
attached.
4. Furnace Lock-Out Condition. Heat
may also be intermittent.
Many furnaces have safety devices that shut down
when a lock-out condition occurs. If the heat works
intermittently contact the furnace manufacturer or
local service person for assistance.
5. Heating system requires service or
thermostat requires replacement.
Diagnostic: Press SYSTEM button to HEAT and
raise the setpoint above room temperature. Within a
few seconds the thermostat should make a soft click
10
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TROUBLESHOOTING
Possible Cause
Corrective Action
Symptom
5. Heating system requires service or
thermostat requires replacement.
(continued)
sound. This sound usually indicates the thermostat
is operating properly. If the thermostat does not
click, try the reset operation listed above. If the
thermostat does not click after being reset contact
your heating and cooling service person or place of
purchase for a replacement. If the thermostat clicks,
contact the furnace manufacturer or a service
person to verify the heating is operating correctly.
No Heat (continued)
1. SYSTEM button not pressed to COOL. Press SYSTEM button to COOL and lower setpoint
No Cool
below room temperature.
2. Loose connection to thermostat or
system.
Verify thermostat and system wires are securely
attached.
3. Cooling system requires service or
thermostat requires replacement.
Same procedure as diagnostic for No Heat condition
except set the thermostat to COOL and lower the
setpoint below the room temperature. There may be
up to a five minute delay before the thermostat clicks
in Cooling.
1. Possible short in wiring.
2. Possible short in thermostat.
3. Possible short in heat/cool/fan
system.
Check each wire connection to verify they are not
shorted or touching together. No bare wire should
stick out from under terminal screws. Try resetting
the thermostat as described above. If the condition
persists the manufacturer of your system or service
person can instruct you on how to test the Heat/Cool
system for correct operation. If the system operates
correctly, replace the thermostat.
Heat, Cool or Fan
Runs Constantly
4. FAN Switch set to Fan On.
1. The location of the thermostat and/or
the size of the Heating System may
be influencing the cycle rate.
Digital thermostats normally provide precise tem-
perature control and may cycle faster than some
older mechanical models. A faster cycle rate means
the unit turns on and off more frequently but runs for
a shorter time so there is no increase in energy use.
If you would like to increase the cycle time, choose
SL for slow cycle in the menu, step 4. If an accept-
able cycle rate is not achieved as received or by
choosing slow cycle, contact a local service person
for additional suggestions.
Furnace
(Air Conditioner)
Cycles Too Fast
or Too Slow (narrow or
wide temperature swing)
The thermometer can be adjusted +/- 4 degrees.
See Temperature Display Adjustment in the Configu-
ration Menu section.
1. Thermostat thermometer setting
requires adjustment.
Thermostat Setting &
Thermostat Thermometer
Disagree
Use the Reset Operation at top of previous page.
1. Voltage spike or static discharge.
Blank Display and/or
Keypad Not Responding
Change system mode to COOL. Raise the Cool
setpoint. Return to HEAT mode and set desired
temperature.
1. The desired setpoint conflicts with the
setpoint of the COOL mode.
Heat Setpoint will
not Respond to the
Temperature Up Key
Change system mode to HEAT. Lower the Heat
setpoint. Return to COOL mode and set desired
temperature.
1. The desired setpoint conflicts with the
setpoint of the HEAT mode.
Cool Setpoint will
not Respond to the
Temperature Down Key
CAUTION: This resets the thermostat to factory
default settings of the configuration menu. After
performing this reset, the thermostat will require
configuration again. Be sure that you know the
required configuration settings before resetting.
Forgot Keypad
Lockout Code
With the thermostat in any mode, press
and
at
the same time to enter the configuration menu at the
point where the lockout code is to be entered. Press
11
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TROUBLESHOOTING
Possible Cause
Corrective Action
Symptom
and
and SYSTEM button at the same time
Forgot Keypad
to reset the lockout code, unlock the keypad and
reset all configuration menu settings.
Lockout Code (continued)
Your thermostat is designed to determine the
optimum time to activate the second stage. Simply
raising the temperature in heating or lowering it in
cooling will not always force the thermostat to
bring the second stage on quickly. There is a time
delay from 0-30 minutes depending on the
First stage is keeping up with demand.
Why won’t my 2nd or
3rd stage come on?
performance of the first stage of the system.
FAQ
Corrective Action
Symptom
Your thermostat display can be set to display temperature in Fahrenheit or
Celsius. This option can be set in the INSTALLER/CONFIGURATION MENU
of your thermostat. See page 6 step 12.
My thermostat is reading in Celsius.
How do I change it to Fahrenheit?
There is no need to select a time to stop a programming period. Starting a
new programming period will stop the previous program period.
Do I have to program a stop time for each
program period?
Unless the thermostat appears to be damaged it will follow the program that is
in the memory. The most common reason a thermostat will appear not to be
following the program is a programming error. Verify that the AM or PM
settings are correct for each period. Also verify that the Day of the week is set
correctly. Models with EMR (Energy Management Recovery) start early to
make the temperature they are programmed for by the time specified in the
program. See the CONFIGURATION MENU on page 6 step 3.
My thermostat does not follow it’s
program. What should I do?
Any time you wish to turn your system off, simply press the SYSTEM button
until “OFF” is displayed. This will not affect your thermostat’s programming in
any way. To turn the system back on, press the SYSTEM button to HEAT or
COOL and press RUN. The system will begin operating according to the
current thermostat program. See under OPERATION page 8 & 9.
Between heating and cooling seasons,
I want to turn my system off. Will this
change my program?
Because it is soldered to the circuit board it is not possible to repair or
replace.
My display light does not work. Can it be
fixed or replaced?
No. This thermostat has permanent memory, although you will have to reset
your clock.
Do I have to reprogram my thermostat
after I change the batteries?
When the thermostat compressor time delay occurs it will flash the setpoint
for about five minutes. This is intended to help protect the compressor from
short cycling.
My setpoint temperature is flashing. What
does that mean?
How can I get a copy of the Operating
Manual for my thermostat?
My program or configuration menu is all
messed up, how do I start from the
beginning?
You can perform software reset by pressing
and SYSTEM buttons
simultaneously when SYSTEM mode is OFF. See “Forget Keypad Lockout
Code” under “TROUBLESHOOTING” for details.
The Emerson logo is a
trademark and service mark
of Emerson Electric Co.
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