White Rodgers 1F85-275 User manual

1F85-2751F85-275
1F85-2751F85-275
1F85-275
Heating & Air Conditioning
5-1-1 Programmable/Non-programmable, Auto
Changeover, Multi-Stage/Heat Pump Thermostat
PART NO. 37-6488APART NO. 37-6488A
PART NO. 37-6488APART NO. 37-6488A
PART NO. 37-6488A
0336
INSTALLATION INSTRUCTIONSINSTALLATION INSTRUCTIONS
INSTALLATION INSTRUCTIONSINSTALLATION INSTRUCTIONS
INSTALLATION INSTRUCTIONS
Operator: Save these instructions for future use!Operator: Save these instructions for future use!
Operator: Save these instructions for future use!Operator: Save these instructions for future use!
Operator: Save these instructions for future use!
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFOREFAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFOREFAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONALINSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONALINSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL
INJURY AND/OR PROPERTY DAMAGE.INJURY AND/OR PROPERTY DAMAGE.
INJURY AND/OR PROPERTY DAMAGE.INJURY AND/OR PROPERTY DAMAGE.
INJURY AND/OR PROPERTY DAMAGE.
PREPARATIONSPREPARATIONS
PREPARATIONSPREPARATIONS
PREPARATIONS
REMOVINGOLDTHERMOSTATREMOVINGOLDTHERMOSTAT
REMOVINGOLDTHERMOSTATREMOVINGOLDTHERMOSTAT
REMOVINGOLDTHERMOSTAT
DescriptionDescription
DescriptionDescription
Description 1F851F85
1F851F85
1F85
Heat Pump (No Aux. or Emergency Heat) Yes
Heat Pump (with Aux. or Emergency Heat) Yes
Standard Heat & Cooling Systems Yes
Two Stage Heat & Two Stage Cool Yes
Standard Heat Only Systems Yes
Millivolt Heat Only Systems – Floor or Wall Furnaces Yes
Standard Central Air Conditioning Yes
Gas or Oil Heat Yes
Electric Furnace Yes
Hydronic (Hot Water) Zone Heat – 2 Wires Yes
Hydronic (Hot Water) Zone Heat – 3 Wires No
White-Rodgers is a division
of Emerson Electric Co.
www.white-rodgers.com
Before removing wires from old thermostat's switching sub-
base, label each wirelabel each wire
label each wirelabel each wire
label each wire with the terminal designation it was
removed from.
1. Shut off electricity at the main fuse box until installation is
complete. Ensure that electrical power is disconnected.
2. Remove Old ThermostatRemove Old Thermostat
Remove Old ThermostatRemove Old Thermostat
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.
b. The base, which is removed by loosening all
captive screws.
c. The switching subbase, which is removed by
unscrewing the mounting screws that hold it on
the wall or adaptor plate.
3. Remove the front cover of the old thermostat. WithWith
WithWith
With
wireswires
wireswires
wires still attachedstill attached
still attachedstill attached
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.
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 THEDO NOT LET WIRES FALL BACK INTO THE
DO NOT LET WIRES FALL BACK INTO THEDO NOT LET WIRES FALL BACK INTO THE
DO NOT LET WIRES FALL BACK INTO THE
WALLWALL
WALLWALL
WALL.
6. Install new thermostat using the following procedures.
Assemble tools required as shown below.
YOUR THERMOSTAT REPLACESYOUR THERMOSTAT REPLACES
YOUR THERMOSTAT REPLACESYOUR THERMOSTAT REPLACES
YOUR THERMOSTAT REPLACES
To prevent electrical shock and/or equipment dam-To prevent electrical shock and/or equipment dam-
To prevent electrical shock and/or equipment dam-To prevent electrical shock and/or equipment dam-
To prevent electrical shock and/or equipment dam-
age, disconnect electric power to system at main fuseage, disconnect electric power to system at main fuse
age, disconnect electric power to system at main fuseage, disconnect electric power to system at main fuse
age, disconnect electric power to system at main fuse
or circuit breaker box until installation is complete.or circuit breaker box until installation is complete.
or circuit breaker box until installation is complete.or circuit breaker box until installation is complete.
or circuit breaker box until installation is complete.
CAUTION
!
Figure 1 – Thermostat baseFigure 1 – Thermostat base
Figure 1 – Thermostat baseFigure 1 – Thermostat base
Figure 1 – Thermostat base
ATTENTION!ATTENTION!
ATTENTION!ATTENTION!
ATTENTION! This product does not contain mercury. How-
ever, this product may replace a unit which contains mercury.
Do not open mercury cells. If a cell becomes damaged, do notnot
notnot
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.
Mercury must not be discarded in household trash. When the
unit this product is replacing is to be discarded, place in a
suitable container and return to White-Rodgers at 2895 Harrison
Street, Batesville, AR 72501 for proper disposal.
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED
SPIRIT LEVEL OR PLUMB BOB AND LINE OPTIONAL—
THERMOSTAT DOES NOT NEED TO BE LEVEL TO WORK PROPERLY
FLAT BLADE SCREWDRIVER
WIRE CUTTER/STRIPPER
Mounting
Hole
Elec-Gas
Switch
Mounting
Hole
AUTOON
ELEC. GAS
C
OBLW2G
Y2
E/W1
Y1

2
LR
E/W1
24 VAC 120 VAC
Hot
SYSTEM
MONITOR
SWITCH
Neutral
THERMOSTAT
SYSTEM
G W2
Figure 3. Typical wiring diagram for two transformer heat pump systems with NO safety circuits
TRANSFORMER
(Class II Current Limited)
2nd Stage
Compressor
CY1
Y2
Compressor
Contactor
Aux
Relay
(Stage 2)
Fan
Relay Emergency
or 1st Aux.
Stage
Relay
Limit or
Safety
Switches
TWO COMMONS MUST
BE JUMPERED TOGETHER!
HOT
NEUTRAL
120 VAC 24 VAC
CUT AND
TAPE OFF!
If safety circuits are in only one of the systems, remove
the transformer of the system with NO safety circuits.
NOTE
Reversing
Valve
Energized in
Heat, Off,
Emergency
Mode
B
Reversing
Valve
Energized in
Cool Mode
O
LR
E/W1
24 VAC 120 VAC
Hot
SYSTEM
MONITOR
SWITCH
Neutral
THERMOSTAT
SYSTEM
G W2
Figure 2. Typical wiring diagram for single transformer heat pump systems
TRANSFORMER
(Class II Current Limited)
2nd Stage
Compressor
CY1
Y2
Compressor
Contactor Aux
Relay
(Stage 2)
Fan
Relay Emergency
or 1st Aux.
Stage
Relay
Reversing Valve
Energized in Heat,
Off, Emergency
Mode
B
Reversing Valve
Energized in Cool
Mode
O
MOUNTING AND WIRINGMOUNTING AND WIRING
MOUNTING AND WIRINGMOUNTING AND WIRING
MOUNTING AND WIRING
The ELEC/GAS switch is factory set to the ELEC position. In
this position, the thermostat will power the circulator fan on a
call for heat. Electric heat systems require the switch to be in the
ELEC position.
If your system does not require that the thermostat power the
circulator fan, this switch should be set to the GAS position.
Typically, gas and oil heating systems do not require the
thermostat to power the circulator fan during a call for heat. If
your heat is gas or oil, the switch should be set to the GAS
position.
When the thermostat is configured for Heat Pump, the thermo-
stat will always power the circulator fan on a call for heat in the
HEAT mode. The ELEC/GAS switch must be set to match the
type of Auxiliary heat your system uses for proper operation in
the EMERgency mode.
Electric/Gas Switch (Fan Option)Electric/Gas Switch (Fan Option)
Electric/Gas Switch (Fan Option)Electric/Gas Switch (Fan Option)
Electric/Gas Switch (Fan Option)
All wiring diagrams are for typical systems only. Refer to
equipment manufacturers' instructions for specific system wir-
ing information.
WARNING
!
Do not use on circuits exceeding specified voltage.Do not use on circuits exceeding specified voltage.
Do not use on circuits exceeding specified voltage.Do not use on circuits exceeding specified voltage.
Do not use on circuits exceeding specified voltage.
Higher voltage will damage control and could causeHigher voltage will damage control and could cause
Higher voltage will damage control and could causeHigher voltage will damage control and could cause
Higher voltage will damage control and could cause
shock or fire hazard.shock or fire hazard.
shock or fire hazard.shock or fire hazard.
shock or fire hazard.
Do not short out terminals on gas valve or primaryDo not short out terminals on gas valve or primary
Do not short out terminals on gas valve or primaryDo not short out terminals on gas valve or primary
Do not short out terminals on gas valve or primary
control to test. Short or incorrect wiring will damagecontrol to test. Short or incorrect wiring will damage
control to test. Short or incorrect wiring will damagecontrol to test. Short or incorrect wiring will damage
control to test. Short or incorrect wiring will damage
thermostat and could cause personal injury and/orthermostat and could cause personal injury and/or
thermostat and could cause personal injury and/orthermostat and could cause personal injury and/or
thermostat and could cause personal injury and/or
property damage.property damage.
property damage.property damage.
property damage.
Thermostat installation and all components of the
system shall conform to Class II circuits per the NEC
code.
Take care when securing and routing wires so they doTake care when securing and routing wires so they do
Take care when securing and routing wires so they doTake care when securing and routing wires so they do
Take care when securing and routing wires so they do
not short to adjacent terminals or rear of thermostat.not short to adjacent terminals or rear of thermostat.
not short to adjacent terminals or rear of thermostat.not short to adjacent terminals or rear of thermostat.
not short to adjacent terminals or rear of thermostat.
Personal injury and/or property damage may occur.Personal injury and/or property damage may occur.
Personal injury and/or property damage may occur.Personal injury and/or property damage may occur.
Personal injury and/or property damage may occur.
CAUTION
!
1. Remove the packing material from the thermostat. Gently
pull the cover straight off the base. Forcing or prying on
the thermostat will cause damage to the unit.
2. Connect wires beneath terminal screws on base using
appropriate wiring schematic (see figs. 2 through 4).
3. Place base over hole in wall and mark mounting hole
locations on wall using base as a template.
4. Move base out of the way. Drill mounting holes.
5. Fasten base loosely to wall, as shown in fig. 1, using two
mounting screws. Place a level against bottom of base,
adjust until level, and then tighten screws. (Leveling is for
appearance only and will not affect thermostat operation.)
If you are using existing mounting holes, or if holes drilled
are too large and do not allow you to tighten base snugly,
use plastic screw anchors to secure subbase.
6. Push excess wire into wall and plug hole with a fire-
resistant material (such as fiberglass insulation) to
prevent drafts from affecting thermostat operation.
Attach Thermostat Base to WallAttach Thermostat Base to Wall
Attach Thermostat Base to WallAttach Thermostat Base to Wall
Attach Thermostat Base to Wall
2 "AA" alkaline batteries are included in the thermostat at the
factory with a battery tag to prevent power drainage. You
must remove the battery tag to engage the batteries.
If BATT is displayed, the batteries are low and should be
replaced with fresh "AA" Energizer® alkaline batteries. To
replace batteries, set system to OFF, install the batteries
along the top of the base (see Fig. 1). The batteries must be
installed with the positive (+) end to the left.
Battery LocationBattery Location
Battery LocationBattery Location
Battery Location

3
WIRING DIAGRAMSWIRING DIAGRAMS
WIRING DIAGRAMSWIRING DIAGRAMS
WIRING DIAGRAMS
LR
E/W1
SYSTEM
MONITOR
SWITCH
GW2
Figure 4. Typical wiring diagram for two transformer heat pump systems with safety circuits in BOTH systems
2nd Stage
Compressor
CY1
Y2
Compressor
Contactor
Aux
Relay
(Stage 2)
Fan
Relay
Emergency
or 1st Aux.
Stage Relay
TWO COMMONS MUST
BE JUMPERED TOGETHER!
24 VAC 120 VAC
HOT
NEUTRAL
THERMOSTAT
SYSTEM
HOT
NEUTRAL
120 VAC
Limit or
Safety
Switches
Limit or
Safety
Switches
Limit or
Safety
Switches
24 VAC
Limit or
Safety
Switches
COMMON
COMMON
Auxiliary
Heating
Transformer
(Class II
Current Limited)
Heat Pump Transformer
(Class II Current Limited)
24 VAC
ACCESSORY
RELAY N.O.
CONTACT
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.
NOTE
The accessory relay scheme
is required when safety
circuits exist in both systems.
NOTE
Reversing
Valve
Energized in
Heat, Off,
Emergency
Mode
B
Reversing
Valve
Energized in
Cool Mode
O
C R
Y2
Compressor
Contactor
Stage 1
Heat
Relay
Stage 1
Heat
Relay
Stage 2
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
Y1
E/W1
W2
Figure 5. Typical wiring diagram for single transformer multi-stage systems
Fan
Relay
G
TRANSFORMER
(Class II, Current Limited)
Compressor
Contactor
Stage 2
Reversing
Valve
Energized in
Heat Mode
Off Emergency
B
Reversing
Valve
Energized in
Cool Mode
O
Refer to equipment manufacturers' instructions for specific
system wiring information.
You can configure the thermostat for use with the following
heat pump system types:
HEAT PUMP TYPE 1HEAT PUMP TYPE 1
HEAT PUMP TYPE 1HEAT PUMP TYPE 1
HEAT PUMP TYPE 1. Single stage compressor system; gas
or electric backup.
This thermostat is designed to operate a single-transformer
system. If you have a two-transformer system, cut and tape off
Heat Pump Terminal OutputsHeat Pump Terminal Outputs
Heat Pump Terminal OutputsHeat Pump Terminal Outputs
Heat Pump Terminal Outputs
one transformer. If transformer safety circuits are in only one of
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.
Use the terminal output information below to help you wire the
thermostat properly for your multi-stage system. After wiring,
see CONFIGURATIONCONFIGURATION
CONFIGURATIONCONFIGURATION
CONFIGURATION section for proper thermostat configu-
ration.
SYSTEMSYSTEM
SYSTEMSYSTEM
SYSTEM LL
LL
LCC
CC
CRR
RR
RW2W2
W2W2
W2 E/W1E/W1
E/W1E/W1
E/W1 Y2Y2
Y2Y2
Y2 Y1Y1
Y1Y1
Y1 GG
GG
GOO
OO
OBB
BB
B
Heat Malfunction 24 Volt 24 Volt Heat Mode Heat mode No Heat and Blower/Fan Energized Energized Energized
Pump 1 Light (Common) (Hot) 3rd stage 2nd stage Output Coolmode on call for Heat in Cool in Heat
Emergency or 1st stage and Cool Mode OFF
Heat mode Emergency 2nd (compressor) Set GAS/ELEC switch Emergency
Pump 2 2nd stage Mode stage for Emergency mode mode
1ststage compressor
THERMOSTAT TERMINALS (HEAT PUMP)THERMOSTAT TERMINALS (HEAT PUMP)
THERMOSTAT TERMINALS (HEAT PUMP)THERMOSTAT TERMINALS (HEAT PUMP)
THERMOSTAT TERMINALS (HEAT PUMP)

4
NOTE
CHECKTHERMOSTAT OPERATIONCHECKTHERMOSTAT OPERATION
CHECKTHERMOSTAT OPERATIONCHECKTHERMOSTAT OPERATION
CHECKTHERMOSTAT OPERATION
To prevent static discharge problems, touch side ofTo prevent static discharge problems, touch side of
To prevent static discharge problems, touch side ofTo prevent static discharge problems, touch side of
To prevent static discharge problems, touch side of
thermostat to release static build-up before touchingthermostat to release static build-up before touching
thermostat to release static build-up before touchingthermostat to release static build-up before touching
thermostat to release static build-up before touching
any keys.any keys.
any keys.any keys.
any keys.
Do not allow the compressor to run unless the com-Do not allow the compressor to run unless the com-
Do not allow the compressor to run unless the com-Do not allow the compressor to run unless the com-
Do not allow the compressor to run unless the com-
pressor oil heaters have been operational for 6 hourspressor oil heaters have been operational for 6 hours
pressor oil heaters have been operational for 6 hourspressor oil heaters have been operational for 6 hours
pressor oil heaters have been operational for 6 hours
and the system has not been operational for at leastand the system has not been operational for at least
and the system has not been operational for at leastand the system has not been operational for at least
and the system has not been operational for at least
5 minutes.5 minutes.
5 minutes.5 minutes.
5 minutes.
CAUTION
!
If at any time during testing your system does not operate
properly, contact a qualified serviceperson.
Fan OperationFan Operation
Fan OperationFan Operation
Fan Operation
If your system does not have a GG
GG
G terminal connection, skip to
Heating SystemHeating System
Heating SystemHeating System
Heating System.
1. Turn on power to system.
2. Move fan switch to ONON
ONON
ON position. The blower should begin
to operate.
3. Move fan switch to AUTOAUTO
AUTOAUTO
AUTO position. The blower should
stop immediately.
Heating SystemHeating System
Heating SystemHeating System
Heating System
1. Press SYSTEM button to select the Flame iconFlame icon
Flame iconFlame icon
Flame icon ( ). If
the auxiliary heating system has a standing pilot, be sure
to light it.
2. Press to adjust thermostat setting to 1° above room
temperature. The heat pump system should begin to
operate. The display should show STG1. However, if the
set point temperature display is flashing, the compressor
lockout feature is operating (see Configuration menu,
item 5).
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 STG 1+2.
4. Press to adjust the thermostat below room tempera-
ture. The heating system should stop operating.
Emergency SystemEmergency System
Emergency SystemEmergency System
Emergency System
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.
1. Press SYSTEM button to select EMER. EMER will flash
on the display.
2. Press to adjust thermostat setting above room
temperature. The Aux. heating system will begin to
operate. The display will show STG1 flashing EMER
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 STG 1+2.
4. Press to adjust the thermostat below room tempera-
ture. The Aux. heating system should stop operating.
To prevent compressor and/or property damage, ifTo prevent compressor and/or property damage, if
To prevent compressor and/or property damage, ifTo prevent compressor and/or property damage, if
To prevent compressor and/or property damage, if
the outdoor temperature is below 50°F, DO NOTthe outdoor temperature is below 50°F, DO NOT
the outdoor temperature is below 50°F, DO NOTthe outdoor temperature is below 50°F, DO NOT
the outdoor temperature is below 50°F, DO NOT
operate the cooling system.operate the cooling system.
operate the cooling system.operate the cooling system.
operate the cooling system.
CAUTION
!
Cooling SystemCooling System
Cooling SystemCooling System
Cooling System
1. Press SYSTEM button to select the Snowflake iconSnowflake icon
Snowflake iconSnowflake icon
Snowflake icon ( ).
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.
3. Adjust temperature setting to 3° below room temperature.
The second stage cooling should begin to operate and
the display should show STG 1+2.
4. Press to adjust the temperature setting above room
temperature. The cooling system should stop operating.
Refer to equipment manufacturers' instructions for specific
system wiring information.
You can configure the thermostat for use with either multi-stage
electric heat systems or multi-stage gas systems. When con-
figured for electricelectric
electricelectric
electric heat, the GG
GG
G terminal (blower/fan) will be
energized on a call for heat.
This thermostat is designed to operate a single-transformer
system. If you have a two-transformer system, cut and tape off
Multi-Stage Terminal OutputsMulti-Stage Terminal Outputs
Multi-Stage Terminal OutputsMulti-Stage Terminal Outputs
Multi-Stage Terminal Outputs
one transformer. If transformer safety circuits are in only one of
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.
Use the terminal output information below to help you wire the
thermostat properly for your multi-stage system. After wiring,
see CONFIGURATIONCONFIGURATION
CONFIGURATIONCONFIGURATION
CONFIGURATION section for proper thermostat configu-
ration.
SYSTEMSYSTEM
SYSTEMSYSTEM
SYSTEM LL
LL
LCC
CC
CRR
RR
RW2W2
W2W2
W2 E/W1/W1
/W1/W1
/W1 Y2Y2
Y2Y2
Y2 Y1Y1
Y1Y1
Y1 GG
GG
GOO
OO
OBB
BB
B
Multi-stage Malfunction 24 Volt 24 Volt Heat Mode Heat mode Cool Mode Cool Mode Blower/Fan Energized Energized Energized
Light (Common) (Hot) 2nd stage 1st stage 2nd stage 1st stage on call for Cool (and in Cool in Heat, Off,
Heat if configured Mode Emergency
to Electric Heat) Modes
THERMOSTAT TERMINALS (MULTI-STAGE)THERMOSTAT TERMINALS (MULTI-STAGE)
THERMOSTAT TERMINALS (MULTI-STAGE)THERMOSTAT TERMINALS (MULTI-STAGE)
THERMOSTAT TERMINALS (MULTI-STAGE)

5
EMER
16
17
FAULT
STG1+2
19 20 18
AP
OPERATIONOPERATION
OPERATIONOPERATION
OPERATION
Figure 6 – Thermostat display, buttons and switchesFigure 6 – Thermostat display, buttons and switches
Figure 6 – Thermostat display, buttons and switchesFigure 6 – Thermostat display, buttons and switches
Figure 6 – Thermostat display, buttons and switches
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 SwitchesThe Thermostat Buttons and Switches
The Thermostat Buttons and SwitchesThe Thermostat Buttons and Switches
The Thermostat Buttons and Switches
1
Raises temperature setting
2
Lowers temperature setting.
3
TIME button.
4
PRGM (program) button.
5
RUN (run program) button.
6
HOLD temperature button.
7
FAN switch (ONON
ONON
ON, AUTOAUTO
AUTOAUTO
AUTO)
8
SYSTEM button (COOLCOOL
COOLCOOL
COOL, AUTOAUTO
AUTOAUTO
AUTO, HEATHEAT
HEATHEAT
HEAT, EMEREMER
EMEREMER
EMER, OFFOFF
OFFOFF
OFF)
The DisplayThe Display
The DisplayThe Display
The Display
9
Indicates day of the week.
10
Flame iconFlame icon
Flame iconFlame icon
Flame icon ( ) is displayed when the system is in
HEATHEAT
HEATHEAT
HEAT mode. Snowflake iconSnowflake icon
Snowflake iconSnowflake icon
Snowflake icon ( ) is displayed when
the system is in COOLCOOL
COOLCOOL
COOL mode. Flame iconFlame icon
Flame iconFlame icon
Flame icon ( ) and
Snowflake iconSnowflake icon
Snowflake iconSnowflake icon
Snowflake icon ( ) are displayed simultaneously
when thermostat is in AUTOAUTO
AUTOAUTO
AUTO mode.
11
Displays BATTBATT
BATTBATT
BATT when the 2 "AA" batteries are low and
should be replaced. Only BATTBATT
BATTBATT
BATT and LOLO
LOLO
LO in the minutes
field are displayed when batteries are low with no
system power.
12
Alternately displays current time and temperature. Dis-
plays LOLO
LOLO
LO in the minutes field when batteries are low.
13
The word HOLDHOLD
HOLDHOLD
HOLD is displayed when the thermostat is
in the HOLD mode. HOLD is displayed flashingHOLD is displayed flashing
HOLD is displayed flashingHOLD is displayed flashing
HOLD is displayed flashing
when the thermostat is in a temporary HOLD mode.when the thermostat is in a temporary HOLD mode.
when the thermostat is in a temporary HOLD mode.when the thermostat is in a temporary HOLD mode.
when the thermostat is in a temporary HOLD mode.
14
Displays currently programmed set temperature (this
is blank when SYSTEM is OFF).
15
Displays FLTRFLTR
FLTRFLTR
FLTR when the system has run for the
programmed filter time period as a reminder to change
or clean your filter.
16
Display ( ) when in keypad lockout mode.
17
EMEREMER
EMEREMER
EMER is displayed flashing when the system is in
EMER mode.
18
Indicates a fault in the heating/cooling system. It does
not indicate a fault in the thermostat.
19
Display ( ) when limited range is activated.
20
Stage1 & 2Stage1 & 2
Stage1 & 2Stage1 & 2
Stage1 & 2 indicators: The thermostat shall indicate
when the first and second stage is energized except
in emergency mode. The icon is STG 1STG 1
STG 1STG 1
STG 1 for the first
stage energized. The icons for the first and second
stage energized are STG1+2STG1+2
STG1+2STG1+2
STG1+2 located in the upper
right side of the display.
CONFIGURATION MENUCONFIGURATION MENU
CONFIGURATION MENUCONFIGURATION MENU
CONFIGURATION MENU
The configuration menu allows you to set certain thermostat
operating characteristics to your system or personal require-
ments.
Set SYSTEMSYSTEM
SYSTEMSYSTEM
SYSTEM button to OFFOFF
OFFOFF
OFF, then simultaneously press
and to enter configuration menu. The display will
show the first item in the configuration menu.
The configuration menu table summarizes the configuration
options. An explanation of each option follows.
Press SYSTEMSYSTEM
SYSTEMSYSTEM
SYSTEM to change to the next menu item. To exit the
menu and return to the program operation, press RUNRUN
RUNRUN
RUN. If no
keys are pressed within fifteen minutes, the thermostat will
revert to normal operation.
1) Single Stage, Multi-stage or Heat Pump SystemSingle Stage, Multi-stage or Heat Pump System
Single Stage, Multi-stage or Heat Pump SystemSingle Stage, Multi-stage or Heat Pump System
Single Stage, Multi-stage or Heat Pump System
ConfigurationConfiguration
ConfigurationConfiguration
Configuration – This control can be configured for Heat
Pump or two stage heat/two stage cool multi-stage opera-
tion. The display indicates MS 2MS 2
MS 2MS 2
MS 2 (default for multi-stage
mode) in the display. The Multi-stage configuration can be
toggled to SS1SS1
SS1SS1
SS1, HP2HP2
HP2HP2
HP2, or HP1HP1
HP1HP1
HP1 by pressing the Tempera-Tempera-
Tempera-Tempera-
Tempera-
ture Upture Up
ture Upture Up
ture Up or Temperature DownTemperature Down
Temperature DownTemperature Down
Temperature Down key. In Multi-stage configu-
ration, system button will not have EMEREMER
EMEREMER
EMERgency mode.
2) Programmable PeriodsProgrammable Periods
Programmable PeriodsProgrammable Periods
Programmable Periods – This control can be configured
for 4, 2 or 0 programmable periods. The display indicates
PRG 4PRG 4
PRG 4PRG 4
PRG 4 in the display as default. The programmable periods
can be toggled to 2 or 0 by pressing the or keys. With
PRG 0PRG 0
PRG 0PRG 0
PRG 0 selected for non-programmable, system key selec-
tion will skip EMREMR
EMREMR
EMR (item 3) and temporary program over-
ride (item 10).
3) Select Energy Management Recovery OFF or ONSelect Energy Management Recovery OFF or ON
Select Energy Management Recovery OFF or ONSelect Energy Management Recovery OFF or ON
Select Energy Management Recovery OFF or ON –
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.

6
Press the System button until OFFOFF
OFFOFF
OFF is displayed, then press the and simultaneously
INSTALLER/CONFIGURATION MENUINSTALLER/CONFIGURATION MENU
INSTALLER/CONFIGURATION MENUINSTALLER/CONFIGURATION MENU
INSTALLER/CONFIGURATION MENU
PressPress
PressPress
Press DisplayedDisplayed
DisplayedDisplayed
Displayed PressPress
PressPress
Press oror
oror
or
StepStep
StepStep
Step Button(s)Button(s)
Button(s)Button(s)
Button(s) (Factory Default)(Factory Default)
(Factory Default)(Factory Default)
(Factory Default) to selectto select
to selectto select
to select CommentsComments
CommentsComments
Comments
1SystemSystem
SystemSystem
System MS 2MS 2
MS 2MS 2
MS 2 SS1,HP2, HP1SS1, HP2, HP1
SS1,HP2, HP1SS1, HP2, HP1
SS1,HP2, HP1 Selects Single stage, Multi-stage, or Heat Pump
(Single stage or 2-stage) System Configuration
2SystemSystem
SystemSystem
System PRG 4PRG 4
PRG 4PRG 4
PRG 4 PRG 0, PRG 2PRG 0, PRG 2
PRG 0, PRG 2PRG 0, PRG 2
PRG 0, PRG 2 SelectsProgrammablePeriods
3SystemSystem
SystemSystem
System EMREMR
EMREMR
EMR OFFOFF
OFFOFF
OFF Selects Energy Management Recovery OFFOFF
OFFOFF
OFF or ONON
ONON
ON
(ON)(ON)
(ON)(ON)
(ON)
4SystemSystem
SystemSystem
System FAFA
FAFA
FA SLSL
SLSL
SL Selects Fast or Slow Cycle Selection
5SystemSystem
SystemSystem
System CLCL
CLCL
CL CLCL
CLCL
CL Selects Compressor Lockout CL OFFCL OFF
CL OFFCL OFF
CL OFF or ONON
ONON
ON
(OFF)(OFF)
(OFF)(OFF)
(OFF) (ON)(ON)
(ON)(ON)
(ON)
6SystemSystem
SystemSystem
System CDLCDL
CDLCDL
CDL CDLCDL
CDLCDL
CDL Selects Backlight Display
(ON)(ON)
(ON)(ON)
(ON) (OFF)(OFF)
(OFF)(OFF)
(OFF)
7SystemSystem
SystemSystem
System FAFA
FAFA
FA FAFA
FAFA
FA Selects Fast Second Stage ONON
ONON
ON or OFFOFF
OFFOFF
OFF
(ON)(ON)
(ON)(ON)
(ON) (OFF)(OFF)
(OFF)(OFF)
(OFF)
8SystemSystem
SystemSystem
System 0 FLTR0 FLTR
0 FLTR0 FLTR
0 FLTR 50-195050-1950
50-195050-1950
50-1950(incrementsof50) Selects filter replacement run time
9SystemSystem
SystemSystem
System 0°F0°F
0°F0°F
0°F 4 LO to 4 HI4 LO to 4 HI
4 LO to 4 HI4 LO to 4 HI
4 LO to 4 HI Selects Temperature Display Adjustment 4 LO4 LO
4 LO4 LO
4 LO to 4 HI4 HI
4 HI4 HI
4 HI
(RoomTemperature)
10 SystemSystem
SystemSystem
System 4:00 HOLD4:00 HOLD
4:00 HOLD4:00 HOLD
4:00 HOLD 0:15 to 8:000:15 to 8:00
0:15 to 8:000:15 to 8:00
0:15 to 8:00 Selects Temporary Program Override Time
(increments of 15 minutes)
11 SystemSystem
SystemSystem
System °F°F
°F°F
°F °C°C
°C°C
°C For °C°C
°C°C
°C selection
12 SystemSystem
SystemSystem
System LRLR
LRLR
LR LR 62 to LR89LR 62 to LR89
LR 62 to LR89LR 62 to LR89
LR 62 to LR89 Selects Limited HEATHEAT
HEATHEAT
HEAT range
(90)(90)
(90)(90)
(90)
13 SystemSystem
SystemSystem
System LRLR
LRLR
LR LR 46 to LR 82LR 46 to LR 82
LR 46 to LR 82LR 46 to LR 82
LR 46 to LR 82 Selects Limited COOL range
(45)(45)
(45)(45)
(45)
14 SystemSystem
SystemSystem
System CACA
CACA
CA CACA
CACA
CA Feature Not Available
(OFF)(OFF)
(OFF)(OFF)
(OFF) (ON)(ON)
(ON)(ON)
(ON)
15 SystemSystem
SystemSystem
System (OFF)(OFF)
(OFF)(OFF)
(OFF) (ON)(ON)
(ON)(ON)
(ON) Selects Keypad Lockout
16 00
00
0001 to 999001 to 999
001 to 999001 to 999
001 to 999 Selects Keypad lockout combination number
Press System to set code
17 Run Returns to the OFF position
CONFIGURATION MENUCONFIGURATION MENU
CONFIGURATION MENUCONFIGURATION MENU
CONFIGURATION MENU
Example:Example:
Example:Example:
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. Cooling allows more time per
degree because it takes longer to reach temperature.
4) Fast or Slow Cycle SelectionFast or Slow Cycle Selection
Fast or Slow Cycle SelectionFast or Slow Cycle Selection
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
temperature key to change to SL. The 1st stage and 2nd
stage would be 1.5°F and 1.2°F respectively.
5) Select Compressor Lockout CL OFF or ONSelect Compressor Lockout CL OFF or ON
Select Compressor Lockout CL OFF or ONSelect Compressor Lockout CL OFF or ON
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.
6) Select Backlight DisplaySelect Backlight Display
Select Backlight DisplaySelect Backlight Display
Select Backlight Display – The display backlight improves
display contrast in low lighting conditions. When the "C"
terminal is powered, selecting backlight CdL ON will keep
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, the light will be on momentarily
after any key is pressed no matter the backlight is selected
ON or OFF.
7) Select (Fast) Second Stage ON or OFFSelect (Fast) Second Stage ON or OFF
Select (Fast) Second Stage ON or OFFSelect (Fast) Second Stage ON or OFF
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.
8) Select filter replacement run timeSelect filter replacement run time
Select filter replacement run timeSelect filter replacement run time
Select filter replacement run time – The thermostat will
display FLTRFLTR
FLTRFLTR
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 000A selection of 000
A selection of 000A selection of 000
A selection of 000
will cancel this featurewill cancel this feature
will cancel this featurewill cancel this feature
will cancel this feature. When FLTRFLTR
FLTRFLTR
FLTR is displayed, you can
clear it by pressing HOLDHOLD
HOLDHOLD
HOLD and RUNRUN
RUNRUN
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.
9) Select Temperature Display Adjustment 4 LO to 4 HISelect Temperature Display Adjustment 4 LO to 4 HI
Select Temperature Display Adjustment 4 LO to 4 HISelect Temperature Display Adjustment 4 LO to 4 HI
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
CONFIGURATIONMENUCONFIGURATIONMENU
CONFIGURATIONMENUCONFIGURATIONMENU
CONFIGURATIONMENU
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONSSPECIFICATIONS
SPECIFICATIONS
Electrical RatingElectrical Rating
Electrical RatingElectrical Rating
Electrical Rating:
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)
ELECTRICAL DATAELECTRICAL DATA
ELECTRICAL DATAELECTRICAL DATA
ELECTRICAL DATA
Setpoint Temperature RangeSetpoint Temperature Range
Setpoint Temperature RangeSetpoint Temperature Range
Setpoint Temperature Range:
45°F to 90°F (7°C to 32°C)
Operating Ambient Temperature RangeOperating Ambient Temperature Range
Operating Ambient Temperature RangeOperating Ambient Temperature Range
Operating Ambient Temperature Range:
32°F to 105°F
Operating Humidity RangeOperating Humidity Range
Operating Humidity RangeOperating Humidity Range
Operating Humidity Range:
0 to 90% RH (non-condensing)
Shipping Temperature RangeShipping Temperature Range
Shipping Temperature RangeShipping Temperature Range
Shipping Temperature Range:
-40°F to 150°F
THERMAL DATATHERMAL DATA
THERMAL DATATHERMAL DATA
THERMAL DATA
OPERATIONOPERATION
OPERATIONOPERATION
OPERATION
The system "mode" is selected by pressing the SYSTEM
button. Icons on the bottom right corner of the display will
indicate the mode: COOLCOOL
COOLCOOL
COOL( ), AUTOAUTO
AUTOAUTO
AUTO ( ), HEATHEAT
HEATHEAT
HEAT( ), EMEREMER
EMEREMER
EMER,
or OFFOFF
OFFOFF
OFF. In any mode except OFFOFF
OFFOFF
OFF, the setpoint temperature will
be shown on the right side of the display. In OFFOFF
OFFOFF
OFF, this area will
be blank. The current temperature will be displayed on the left
side of the display.
To operate properly in the AUTOAUTO
AUTOAUTO
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.
Automatic System ChangeoverAutomatic System Changeover
Automatic System ChangeoverAutomatic System Changeover
Automatic System Changeover
When the thermostat is in the AUTOAUTO
AUTOAUTO
AUTO mode, both the FlameFlame
FlameFlame
Flame and
SnowflakeSnowflake
SnowflakeSnowflake
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
last system cycle was heat, the HEATHEAT
HEATHEAT
HEATsetpoint will be displayed.
If the room temperature raises above the HEATHEAT
HEATHEAT
HEAT setpoint and
the COOLCOOL
COOLCOOL
COOL setpoint and a call for cool is required, the tempera-
ture displayed will change to be the COOLCOOL
COOLCOOL
COOL setpoint.
10)Select Temporary Program Override TimeSelect Temporary Program Override Time
Select Temporary Program Override TimeSelect Temporary Program Override Time
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
8:00 hours in 15 minute increments.
Example:
1. You have selected 3:00 hours for the Temporary Pro-
gram Override time period.
2. With the thermostat set to Heat or Cool, press HOLD
for approximately 5 secondsfor approximately 5 seconds
for approximately 5 secondsfor approximately 5 seconds
for approximately 5 seconds until HOLD time (3:00
indicating 3 hours) appears as a setting reminder.
3. After releasing the button, HOLDHOLD
HOLDHOLD
HOLD on the display will blink.
4. Use or to set the temperature to your preference.
The thermostat will maintain this temperature setting for
3 hours with HOLDHOLD
HOLDHOLD
HOLD blinking to remind you it is in
Temporary Hold. After 3 hours, the thermostat will go
back to the program temperature and HOLDHOLD
HOLDHOLD
HOLD will no
longer blink or display.
11)Select F° or C° ReadoutSelect F° or C° Readout
Select F° or C° ReadoutSelect F° or C° Readout
Select F° or C° Readout – Changes the display readout to
Centigrade or Fahrenheit as required.
12)Limited Heat RangeLimited Heat Range
Limited Heat RangeLimited Heat Range
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
temperature uptemperature up
temperature uptemperature up
temperature up or temperature downtemperature down
temperature downtemperature down
temperature down key.
13)Limited Cool RangeLimited Cool Range
Limited Cool RangeLimited Cool Range
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
temperature up or temperature down key.
14)This feature not availableThis feature not available
This feature not availableThis feature not available
This feature not available.
15 & 16) Keypad LockoutKeypad Lockout
Keypad LockoutKeypad Lockout
Keypad Lockout – This menu selection will display
locklock
locklock
lock icon. The and are used to toggle the function and
display the locklock
locklock
lock icon and OFFOFF
OFFOFF
OFF (keypad not locked out,
default) indicating in the time digits to the locklock
locklock
lock icon and ONON
ONON
ON
(keypad locked out). When the keypad lockout function is
enabled (ONON
ONON
ON), and the SYSTEMSYSTEM
SYSTEMSYSTEM
SYSTEM key is pressed again, the
display will indicate the number 00
00
0 (default, still disabled) in
the time digits. The and are used to set the combina-
tion number from 00
00
0 to 999999
999999
999. "00
00
0" will not be a valid combination.
If a combination of 00
00
0 is selected and the system key is
pressed the menu will be exited and keypad lockout will not
be evoked. If 1 to 9991 to 999
1 to 9991 to 999
1 to 999 is selected and the SYSTEMSYSTEM
SYSTEMSYSTEM
SYSTEM key is
pressed again, the combination is locked into non-volatile
memory and the menu is exited. The locklock
locklock
lock icon (to designate
keypad locked with a valid combination) will display when
the menu is exited. The system key will operate for 10
seconds after the menu mode is exited to allow the user to
change the mode from OFFOFF
OFFOFF
OFF to the desired system mode.
While the keypad is locked out, a simul-
taneous press of the temperature and will enter the
menu item from any mode instead of only OFF modeOFF mode
OFF modeOFF mode
OFF mode. When
the menu is entered with the keypad lockout feature en-
abled, the first menu item displayed is the combination
code 00
00
0. The or keys are used to set the combination
unlock number from 00
00
0 to 999999
999999
999. If the unlock number matches
exactly with the combination lock number stored in memory
when the SYSTEMSYSTEM
SYSTEMSYSTEM
SYSTEM key is pressed, the keypad is unlocked
and the locklock
locklock
lock icon is removed. If the unlock number does not
match when the SYSTEMSYSTEM
SYSTEMSYSTEM
SYSTEM key is pressed, menu is exited
and the keypad remains disabled.
To reset the combination code and unlock the keypad if the
code is forgotten, see troubleshooting section.

8
OPERATIONOPERATION
OPERATIONOPERATION
OPERATION
Manual OperationManual Operation
Manual OperationManual Operation
Manual Operation
Permanent Program OverridePermanent Program Override
Permanent Program OverridePermanent Program Override
Permanent Program Override (HOLDHOLD
HOLDHOLD
HOLD) – With the SYSTEM
button set to HEATHEAT
HEATHEAT
HEAT or COOLCOOL
COOLCOOL
COOL, press the HOLD button once and
release. HOLDHOLD
HOLDHOLD
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.
Temperature OverrideTemperature Override
Temperature OverrideTemperature Override
Temperature 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 until the next program period begins.
Then the thermostat will automatically revert to the program.
Temporary Program OverrideTemporary Program Override
Temporary Program OverrideTemporary Program Override
Temporary Program Override – The thermostat will override
current programming and keep the room temperature at the
selected temperature for a programmed time period whenever
or keys are pressed. Once in the menu mode, press
or to change the time period.
PROGRAMMING YOUR THERMOSTATPROGRAMMING YOUR THERMOSTAT
PROGRAMMING YOUR THERMOSTATPROGRAMMING YOUR THERMOSTAT
PROGRAMMING YOUR THERMOSTAT
This section will help you plan your thermostat's program to
meet your needs. For maximum comfort and efficiency, keep
the 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.
• During early morning hours, the need for cooling is usually
minimal.
Planning Your ProgramPlanning Your Program
Planning Your ProgramPlanning Your Program
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.
If you want to change the preprogrammed times and tempera-
tures, follow these steps.
Determine the time periods and temperatures for your pro-
gram. You must program four periods for each day. However,
you may use the same heating and cooling 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 1st1st
1st1st
1st
period heatingperiod heating
period heatingperiod heating
period heating start time and temperature and also choose
7:00 AM and 76° as the weekday 1st period cooling1st period cooling
1st period cooling1st period cooling
1st period cooling start time
and temperature).
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.
WEEKDAYS
(5 Day) SATURDAY
(1 Day)
Start
Time Temp Start Time Temp
1ST
2ND
3RD
4TH
1ST
2ND
3RD
4TH
SAMPLE
Heating/Cooling Schedule Plan (Factory Program)
Period
6:00 AM
8:00 AM
5:00 PM
10:00 PM
6:00 AM
8:00 AM
5:00 PM
10:00 PM
6:00 AM
8:00 AM
5:00 PM
10:00 PM
6:00 AM
8:00 AM
5:00 PM
10:00 PM
70 F
62 F
70 F
62 F
78 F
85 F
78 F
82 F
SUNDAY
(1 Day)
Start
Time Temp
6:00 AM
8:00 AM
5:00 PM
10:00 PM
6:00 AM
8:00 AM
5:00 PM
10:00 PM
70 F
62 F
70 F
62 F
78 F
85 F
78 F
82 F
70 F
62 F
70 F
62 F
78 F
85 F
78 F
82 F
HEAT
COOL
WEEKDAYS
(5 Day) SATURDAY
(1 Day)
Start
Time Temp Start Time Temp
1ST
2ND
3RD
4TH
1ST
2ND
3RD
4TH
Heating/Cooling Schedule Plan
Period
SUNDAY
(1 Day)
Start
Time Temp
HEAT
COOL
Second Stage Time DelaySecond Stage Time Delay
Second Stage Time DelaySecond Stage Time Delay
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.
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 degree 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.

9
Entering Your ProgramEntering Your Program
Entering Your ProgramEntering Your Program
Entering Your Program
Set Current Time and DaySet Current Time and Day
Set Current Time and DaySet Current Time and Day
Set Current Time and Day
1. Press TIME button once. The display will show the hour
only.
EXAMPLE:
2. Press and hold either or until you reach the
correct hour and AM/PM designation (AMAM
AMAM
AM begins at mid-
night; PMPM
PMPM
PM begins at noon).
3. Press TIME once again. The display window will show
the minutes only.
EXAMPLE:
4. Press and hold either or until you reach the
correct minutes.
5. Press TIME once again. The display will show the day of
the week.
6. Press or until you reach the current day of the
week.
7. Press RUN once. The display will show the correct time
and room temperature alternately.
PM
Enter Heating ProgramEnter Heating Program
Enter Heating ProgramEnter Heating Program
Enter Heating Program
1. Press the SYSTEM button to HEAT.
2. Press PRGM once. "MO TU WE TH FR" (indicating
weekday program) will appear in the display. Also dis-
played are the currently programmed start time for the
1st heating period and the currently programmed temp-
erature (flashing).
EXAMPLE:
This display window shows that for the 1st weekday
period, the start time is 6:00 AM and 68° is the program-
med temperature (this example reflects factory prepro-
gramming.
3. Press or to change the displayed temperature
to your selected temperature for the 1st heating program
period.
4. Press TIME once (the programmed time will flash). Press
or until your selected time appears. The time
will change in 15 minute increments. When your selected
time is displayed, press TIME again to return to the
change temperature mode.
5. Press PRGM once. The currently programmed start time
and setpoint temperature for the 2nd heating2nd heating
2nd heating2nd heating
2nd heating program
period will appear.
6. Repeat steps 3 and 4 to select the start time and heating
temperature for the 2nd heating program period.
7. Repeat steps 3 through 5 for the 3rd and 4th heating
program periods.
8. Press PRGM once "SASA
SASA
SA" (indicating Saturday program)
will appear in the display, along with the start time for the
1st heating period and the currently programmed temp-
erature.
9. Repeat steps 3 through 7 to complete Saturday heating
programming.
AM
MO TU WE TH FR
OPERATIONOPERATION
OPERATIONOPERATION
OPERATION
Enter Cooling ProgramEnter Cooling Program
Enter Cooling ProgramEnter Cooling Program
Enter Cooling Program
If the outside temperature is below 50°F, disconnectIf the outside temperature is below 50°F, disconnect
If the outside temperature is below 50°F, disconnectIf the outside temperature is below 50°F, disconnect
If the outside temperature is below 50°F, disconnect
power to the cooling system before programming.power to the cooling system before programming.
power to the cooling system before programming.power to the cooling system before programming.
power to the cooling system before programming.
Energizing the air conditioner compressor duringEnergizing the air conditioner compressor during
Energizing the air conditioner compressor duringEnergizing the air conditioner compressor during
Energizing the air conditioner compressor during
cold weather may cause personal injury or propertycold weather may cause personal injury or property
cold weather may cause personal injury or propertycold weather may cause personal injury or property
cold weather may cause personal injury or property
damage.damage.
damage.damage.
damage.
CAUTION
!
1. Press SYSTEM button to COOL position.
2. Follow Enter Heating Program for entering your cooling
program, using your selected cooling times and tempera-
tures.
CHECK YOUR PROGRAMMINGCHECK YOUR PROGRAMMING
CHECK YOUR PROGRAMMINGCHECK YOUR PROGRAMMING
CHECK YOUR PROGRAMMING
Follow these steps to check your thermostat programming
one final time before beginning thermostat operation.
1. Press SYSTEM button to HEATHEAT
HEATHEAT
HEAT position.
2. Press PRGM to view the 1st weekday heating period
time and temperature. Each time you press PRGM, the
next heating period time and temperature will be display-
ed in sequence for weekday, then Saturday and Sunday
program periods (you may change any time or tempera-
ture during this procedure.
3. Press RUN.
4. Press SYSTEM button to COOLCOOL
COOLCOOL
COOL position.
5. Repeat step 2 to check cooling program.
6. Press SYSTEM button to HEATHEAT
HEATHEAT
HEAT or COOLCOOL
COOLCOOL
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.
YOUR THERMOSTAT IS NOW PROGRAMMED AND READY TOYOUR THERMOSTAT IS NOW PROGRAMMED AND READY TO
YOUR THERMOSTAT IS NOW PROGRAMMED AND READY TOYOUR THERMOSTAT IS NOW PROGRAMMED AND READY TO
YOUR THERMOSTAT IS NOW PROGRAMMED AND READY TO
PROVIDEMAXIMUMCOMFORT AND EFFICIENCY!PROVIDEMAXIMUM COMFORT AND EFFICIENCY!
PROVIDEMAXIMUMCOMFORT AND EFFICIENCY!PROVIDEMAXIMUM COMFORT AND EFFICIENCY!
PROVIDEMAXIMUMCOMFORT AND EFFICIENCY!
10.Press PRGM once to change to SU (Sunday) heating
programming and repeat steps 3 through 7 to complete
Sunday programming.
11.When you have completed entering your heating pro-
gram, press RUN.

10
TROUBLESHOOTINGTROUBLESHOOTING
TROUBLESHOOTINGTROUBLESHOOTING
TROUBLESHOOTING
Reset OperationReset Operation
Reset OperationReset Operation
Reset Operation
If a voltage spike or static discharge blanks out the display or causes erratic thermostat operation, you can reset the
thermostat by removing the wires from terminals R and C and removing batteries for 2 minutes. After resetting the thermo-
stat, 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.
SymptomSymptom
SymptomSymptom
Symptom
No Heat/No Cool/No FanNo Heat/No Cool/No Fan
No Heat/No Cool/No FanNo Heat/No Cool/No Fan
No Heat/No Cool/No Fan
(common problems)(common problems)
(common problems)(common problems)
(common problems)
No HeatNo Heat
No HeatNo Heat
No Heat
No CoolNo Cool
No CoolNo Cool
No Cool
Heat, Cool or FanHeat, Cool or Fan
Heat, Cool or FanHeat, Cool or Fan
Heat, Cool or Fan
Runs ConstantlyRuns Constantly
Runs ConstantlyRuns Constantly
Runs Constantly
FurnaceFurnace
FurnaceFurnace
Furnace
(Air Conditioner)(Air Conditioner)
(Air Conditioner)(Air Conditioner)
(Air Conditioner)
Cycles Too FastCycles Too Fast
Cycles Too FastCycles Too Fast
Cycles Too Fast
or Too Slow (narrow oror Too Slow (narrow or
or Too Slow (narrow oror Too Slow (narrow or
or Too Slow (narrow or
wide temperature swing)wide temperature swing)
wide temperature swing)wide temperature swing)
wide temperature swing)
Possible CausePossible Cause
Possible CausePossible Cause
Possible Cause
1. Blown fuse or tripped circuit breaker.
2. Furnace power switch to OFF.
3. Furnace blower compartment door or
panel loose or not properly installed.
1. Pilot light not lit.
2. System Switch not set to HEAT.
3. Loose connection to thermostat or
system.
4. Furnace Lock-Out Condition. Heat
may also be intermittent.
5. Heating system requires service or
thermostat requires replacement.
1. System Switch not set to COOL.
2. Loose connection to thermostat or
system.
3. Cooling system requires service or
thermostat requires replacement.
1. Possible short in wiring.
2. Possible short in thermostat.
3. Possible short in heat/cool/fan
system.
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.
Corrective ActionCorrective Action
Corrective ActionCorrective Action
Corrective Action
Replace fuse or reset breaker.
Turn switch to ON.
Replace door panel in proper position to engage
safety interlock or door switch.
Re-light pilot.
Set System Switch to HEAT and raise setpoint
above room temperature.
Verify thermostat and system wires are securely
attached.
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.
Diagnostic: Set System Switch to HEAT and raise
the setpoint above room temperature. Within a few
seconds the thermostat should make a soft click
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.
Set System Switch to COOL and lower setpoint
below room temperature.
Verify thermostat and system wires are securely
attached.
Same procedure as diagnostic for No Heat condi-
tion 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.
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.
Digital thermostats normally provide precise
temperature 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 SLSL
SLSL
SL for slow cycle in the menu, step 4.
If an acceptable cycle rate is not achieved as
received or by choosing slow cycle, contact a local
service person for additional suggestions.

11
TROUBLESHOOTINGTROUBLESHOOTING
TROUBLESHOOTINGTROUBLESHOOTING
TROUBLESHOOTING
SymptomSymptom
SymptomSymptom
Symptom
Thermostat Setting &Thermostat Setting &
Thermostat Setting &Thermostat Setting &
Thermostat Setting &
Thermostat ThermometerThermostat Thermometer
Thermostat ThermometerThermostat Thermometer
Thermostat Thermometer
DisagreeDisagree
DisagreeDisagree
Disagree
Blank Display and/orBlank Display and/or
Blank Display and/orBlank Display and/or
Blank Display and/or
Keypad Not RespondingKeypad Not Responding
Keypad Not RespondingKeypad Not Responding
Keypad Not Responding
Heat Setpoint willHeat Setpoint will
Heat Setpoint willHeat Setpoint will
Heat Setpoint will
not Respond to thenot Respond to the
not Respond to thenot Respond to the
not Respond to the
Temperature Up KeyTemperature Up Key
Temperature Up KeyTemperature Up Key
Temperature Up Key
Cool Setpoint willCool Setpoint will
Cool Setpoint willCool Setpoint will
Cool Setpoint will
not Respond to thenot Respond to the
not Respond to thenot Respond to the
not Respond to the
Temperature Down KeyTemperature Down Key
Temperature Down KeyTemperature Down Key
Temperature Down Key
Forgot KeypadForgot Keypad
Forgot KeypadForgot Keypad
Forgot Keypad
Lockout CodeLockout Code
Lockout CodeLockout Code
Lockout Code
Why won't my 2nd orWhy won't my 2nd or
Why won't my 2nd orWhy won't my 2nd or
Why won't my 2nd or
3rd stage come on?3rd stage come on?
3rd stage come on?3rd stage come on?
3rd stage come on?
Possible CausePossible Cause
Possible CausePossible Cause
Possible Cause
1. Thermostat thermometer setting
requires adjustment.
1. Voltage spike or static discharge.
1. The desired setpoint conflicts with the
setpoint of the COOL mode.
1. The desired setpoint conflicts with the
setpoint of the HEAT mode.
Corrective ActionCorrective Action
Corrective ActionCorrective Action
Corrective Action
The thermometer can be adjusted +/- 3 degrees.
See Temperature Display Adjustment in the
Configuration Menu section.
Use the Reset Operation at top of previous page.
Change system mode to COOL. Raise the Cool
setpoint. Return to HEAT mode and set desired
temperature.
Change system mode to HEAT. Lower the Heat
setpoint. Return to COOL mode and set desired
temperature.
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.
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 and and SYSTEM button at
the same time to reset the lockout code, unlock the
keypad and reset all configuration menu settings.
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.

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trademark and service mark
of Emerson Electric Co.