Emerson 1F83 277 Thermostat User Manual

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1
F83-277  
Heating & Air Conditioning  
Non-programmable, Auto Changeover, Multi-Stage/Heat  
Pump Thermostat  
INSTALLATION INSTRUCTIONS  
Operator: Save these instructions for future use!  
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BE-  
FORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PER-  
SONAL INJURY AND/OR PROPERTY DAMAGE.  
PREPARATIONS  
YOUR THERMOSTAT REPLACES  
Description  
Assemble tools required as shown below.  
1F83-277  
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  
Yes  
HAND OR POWER  
DRILL WITH 3/16 INCH  
DRILL BIT, IF NEEDED  
WIRE CUTTER/STRIPPER  
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  
REMOVING OLD THERMOSTAT  
CAUTION  
!
To prevent electrical shock and/or equipment damage,  
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
1
. Shut off electricity at the main fuse box until installation is  
complete. Ensure that electrical power is disconnected.  
E/W1  
Y1  
O
B
L W2 G  
Mounting  
Hole  
Mounting  
Hole  
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.  
ON  
GAS  
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  
suitable container and refer to www.white-rodgers.com for the  
location to send product containing mercury.  
6. Install new thermostat using the following procedures.  
White-Rodgers is a division  
of Emerson Electric Co.  
www.white-rodgers.com  
PART NO. 37-6509E  
Replaces 37-6509D  
0818  
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MOUNTING AND WIRING  
WARNING  
Do not use on circuits exceeding specified voltage.  
Higher voltage will damage control and could cause  
shock or fire hazard.  
CAUTION  
Take care when securing and routing wires so they do  
not short to adjacent terminals or rear of thermostat.  
Personal injury and/or property damage may occur.  
!
!
Attach Thermostat Base to Wall  
. 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.  
Do not short out terminals on gas valve or primary  
control to test. Short or incorrect wiring will damage  
thermostat and could cause personal injury and/or  
property damage.  
1
2
. Connect wires beneath terminal screws on base using  
appropriate wiring schematic (see figs. 2 through 4).  
Thermostat installation and all components of the  
system shall conform to Class II circuits per the NEC  
code.  
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.  
Electric/Gas Switch (Fan Option)  
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.  
This thermostat is configured from the factory to operate a heat/  
cool, fossil fuel (gas, oil, etc.), forced air system. It is configured  
correctly for any system that DOES NOT require the thermostat  
to energize the fan on a call for heat. If you system is an electric  
heat or heat-pump system that REQUIRES the thermostat to  
turn on the fan on a call for heat, locate the ELEC/GAS switch  
on the back of the thermostat (see fig. 1) and switch it to the  
ELEC position. This will allow the thermostat to energize the fan  
immediately on a call for heat. If you are unsure if the heating/  
cooling system requires the thermostat to control the fan,  
contact a qualified heating and air conditioning service person.  
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.  
Battery Location  
2
“AA” alkaline batteries are included in the thermostat at the  
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.  
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. For best results, replace all batteries with new  
®
premium brand alkaline batteries such as Duracell or  
Energizer . To replace batteries, press system button to  
All wiring diagrams are for typical systems only. Refer to  
®
equipment manufacturers’ instructions for specific system wir- OFF, install the batteries along the top of the base (see Fig.  
ing information.  
1). The batteries must be installed with the positive (+) end to  
the left.  
E/W1  
THERMOSTAT  
R
*
O
B
Y2  
Y1  
G
W2  
C
L
SYSTEM  
SYSTEM  
MONITOR  
SWITCH  
Reversing Valve  
Energized in Cool  
Mode  
Reversing Valve  
Energized in Heat,  
Off, Emergency  
Mode  
2nd Stage  
Compressor  
Fan  
Relay  
Emergency  
Heat  
Relay  
Aux  
Heat  
Relay  
Compressor  
Contactor  
Hot  
2
4 VAC  
120 VAC  
Neutral  
TRANSFORMER  
(
Class II Current Limited)  
Figure 2.Typical wiring diagram for single transformer heat pump 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” alkaline batteries.  
*
NOTE  
If safety circuits are in only one of the systems, remove  
the transformer of the system with NO safety circuits.  
E/W1  
THERMOSTAT  
*
O
B
Y2  
Y1  
G
W2  
C
L
R
SYSTEM  
CUT AND  
TAPE OFF!  
Reversing  
Valve  
Energized in  
Heat, Off,  
Emergency  
Mode  
SYSTEM  
MONITOR  
SWITCH  
Reversing  
Valve  
Energized in  
Cool Mode  
2nd Stage  
Compressor  
Fan  
Relay  
Limit or  
Safety  
Emergency  
Heat  
Relay  
HOT  
Switches  
1
20 VAC  
NEUTRAL  
24 VAC  
Aux  
Heat  
Relay  
Compressor  
Contactor  
Hot  
2
4 VAC  
120 VAC  
Neutral  
TWO COMMONS MUST  
BE JUMPERED TOGETHER!  
TRANSFORMER  
Class II Current Limited)  
(
Figure 3.Typical wiring diagram for two transformer heat pump systems with NO safety circuits  
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” alkaline batteries.  
*
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WIRING DIAGRAMS  
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  
ACCESSORY  
RELAY N.O.  
CONTACT  
NOTE  
Aux  
Heat  
Relay  
Compressor  
Contactor  
The accessory relay scheme  
is required when safety  
circuits exist in both systems.  
Current Limited)  
COMMON  
TWO COMMONS MUST  
BE JUMPERED TOGETHER!  
Limit or  
Limit or  
Safety  
Safety  
Switches  
Switches HOT  
COMMON  
24 VAC  
120 VAC  
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” alkaline batteries.  
*
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  
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.  
75VAClassIItransformer. Afterdisconnectingonetransformer,  
the two commons must be jumpered together.  
Use the terminal output information below to help you wire the  
thermostat properly for your heat pump 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 (HEAT PUMP)  
W2 E/W1 Y2 Y1  
SYSTEM  
L
C*  
R
G
O
B
Heat  
Pump 1  
Fault  
24 Volt 24 Volt Heat Mode Emergency  
No  
Heat and Blower/Fan Energized Energized Energized  
Output Cool mode on call for Heat in Cool in Heat  
1st stage and Cool Mode OFF  
Indicator (Common) (Hot) 2nd stage,  
Mode  
or System  
Malfunction  
Switch  
Emergency 1st stage  
Mode 2nd  
Heat  
Pump 2  
2nd  
stage  
compressor  
(compressor) Set GAS/ELEC switch  
for Emergency mode  
Emergency  
mode  
stage  
Heat Mode  
3
rd stage,  
Emergency  
Mode 2nd  
stage  
*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” alkaline batteries.  
E/W1  
THERMOSTAT  
SYSTEM  
*
O
B
Y1  
Y2  
G
W2  
C
R
Compressor  
Contactor  
Stage 2  
Heat  
Relay  
Reversing  
Valve  
Reversing  
Valve  
Stage 1  
Hot  
Energized in  
Cool Mode  
Energized in  
Heat Mode  
Off Emergency  
24 VAC  
120 VAC  
Compressor  
Contactor  
Stage 1  
Heat  
Relay  
Fan  
Neutral  
TRANSFORMER  
Class II, Current Limited)  
Relay  
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” alkaline batteries.  
*
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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  
You can configure the thermostat for use with either multi-stage  
electric heat systems or multi-stage gas systems. When config-  
ured for electric heat, the G terminal (blower/fan) will be  
energized on a call for heat.  
75VAClassIItransformer. Afterdisconnectingonetransformer,  
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 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 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  
to Electric Heat)  
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” alkaline batteries.  
CHECK THERMOSTAT OPERATION  
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 service person.  
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.  
. Adjust temperature setting to 3° above room temperature.  
The auxiliary heat system should begin to operate and  
the display should show “STG1+2”.  
1
2
. Turn on power to system.  
. Move FAN switch to ON position. The blower should be-  
gin to operate.  
3
3
. Move FAN switch to AUTO position. The blower should  
4
. Press  
to adjust the thermostat below room tempera-  
stop immediately.  
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  
. Press SYSTEM button to select the Snowflake icon ( ).  
Heating System  
1
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  
temperature. The heating system should begin to  
operate. The display should show “STG1”. However, if  
the setpoint temperature display is flashing, the compres-  
sor lockout feature is operating (see Configuration menu,  
item 5).  
3. Adjust temperature setting to 3° below room temperature.  
The second stage cooling should begin to operate and  
the display should show “STG1+2”.  
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 con-  
sists 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  
1
2
3
4
Raises temperature setting  
Lowers temperature setting.  
FAN switch (ON, AUTO)  
SYSTEM button (COOL, AUTO, HEAT, EMER, OFF)  
STG1+2  
FAULT  
EMER  
The Display  
5
6
Flame icon ( ) is displayed when the system is in  
HEAT mode. Snowflake icon ( ) is displayed when  
Figure 6 – Thermostat display, buttons and switches  
the system is in COOL mode. Flame icon ( ) and  
Snowflake icon ( ) are displayed simultaneously  
when thermostat is in AUTO mode.  
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.  
12 “FAULT” will be displayed when there is a malfunction  
in the HEAT/COOL system.  
1
3
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.  
7
8
9
Displays current temperature or “LO” in the minutes  
field when batteries are low.  
Displays set temperature (this is blank when SYSTEM  
is OFF).  
1
4
Stage 1 & 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.  
Displays “FLTR” when the system has run for the  
programmed filter time period as a reminder to change  
or clean your filter.  
10  
Display ( ) when in keypad lockout mode.  
11  
“EMER” is displayed flashing when the system is in  
EMER mode.  
CONFIGURATION MENU  
The configuration menu allows you to set certain thermostat 1) Single Stage, Multi-stage or Heat Pump System  
operating characteristics to your system or personal require-  
ments.  
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  
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
) 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  
Press SYSTEM to change to the next menu item. To exit the  
menu and return to the program operation, press RUN. If no  
keys are pressed within fifteen minutes, the thermostat will  
revert to normal operation.  
or  
key to change to SL. The 1st stage and 2nd  
stage would be 1.5°F and 1.2°F respectively.  
5
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CONFIGURATION MENU  
Press the SYSTEM button until OFF is displayed, then press the  
and  
simultaneously  
INSTALLER/CONFIGURATION MENU  
Press  
Displayed  
Press  
or  
Step  
Button(s) (Factory Default)  
to select  
Comments  
1
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  
FA  
CL  
SL  
Selects Fast or Slow Cycle Selection  
CL  
Selects Compressor Lockout CL OFF or ON  
(OFF)  
(ON)  
4
5
System  
System  
CDL  
CDL  
Selects Backlight Display  
Selects Fast Second Stage ON or OFF  
Selects filter replacement run time  
(ON)  
(OFF)  
FA  
FA  
(OFF)  
(ON)  
6
7
System  
System  
0 FLTR  
50-1950 (increments of 50)  
0°F  
4 LO to 4 HI  
Selects Temperature Display Adjustment 4 LO to 4 HI  
(Room Temperature)  
8
9
System  
System  
°F  
°C  
Selects temperature display or °C selection  
AU On  
OFF  
Selects AUTO Mode ON or OFF  
(
Not available on earlier models)  
10  
11  
12  
13  
14  
15  
System  
System  
System  
System  
System  
System  
LR  
LR 62 to LR89  
LR 46 to LR 82  
Selects Limited HEAT range  
(90)  
LR  
Selects Limited COOL range  
Feature Not Available  
(45)  
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  
3
) 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.  
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.  
5
) 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.  
4
) 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  
6
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CONFIGURATION MENU  
6) Select filter replacement run time  The thermostat will 13 & 14) Keypad Lockout  This menu selection will display  
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  
lock icon ( ) and “OFF” (default, keypad not locked out).  
The and are used to toggle the selection between OFF  
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”  
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 SYSTEM. This resets the timer and  
starts counting the hours until the next filter change. Contact  
your system manufacturer for a specific replacement/main  
tenance interval.  
(default, still disabled) in the time digits. The  
and  
are  
used to set the combination number from 0 to 999. If a  
combination of 0 is 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  
operate for 10 seconds after the menu mode is exited to  
allow the user to change the mode from OFF to the desired  
SYSTEM mode.  
7
) 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.  
8
) Select F° or C° Readout  Changes the display readout  
to Centigrade or Fahrenheit as required.  
While the keypad is locked out, a simultaneous press of  
and  
will enter the configuration menu from any  
9
) Selected Auto mode  This control will feature AUTO  
changeover mode when AU on is selected (default). Press  
mode instead of only OFF mode. When the menu is  
entered with the keypad lockout feature enabled, the first  
the  
or  
keys (not available on earlier models) to defeat  
menu item displayed is the combination code 0. The  
or  
the auto changeover mode (OFF).  
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.  
1
1
1
0)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  
or  
key.  
1)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  
To reset the combination code and unlock the keypad if  
the code is forgotten, see troubleshooting section.  
or  
key.  
2)This Feature Not Available.  
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  
2
0
2
0 to 30 VAC 50/60 Hz or DC  
.05 to 1.5 Amps (Load per terminal)  
.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  
-
7
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OPERATION  
The system "mode" is selected by pressing the SYSTEM the room temperature is 70° with the equipment using only the  
button. Icons on the bottom right corner of the display will first stage of heat. Since the equipment is keeping the tempera-  
indicatethemode: COOL( ), AUTO(  
), HEAT ( ),EMER, ture within 1° of setpoint, the thermostat will delay second stage  
or OFF. In any mode except OFF, the setpoint temperature will for a longer time if you manually raise the temperature or if the  
be shown on the right side of the display. In OFF, this area will room temperature quickly changes. Once the second stage  
be blank. The current temperature will be displayed on the left comes on, it will come on sooner the next time there is a  
side of the display.  
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.  
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.  
Automatic System Changeover  
When the thermostat is in the AUTO mode, both theFlame 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.  
LOW BATTERY INDICATOR  
Ifthe2“AA”alkalinebatteriesarelowandshouldbereplaced,  
the display will be blank except for “  
LO BATT”. We recom-  
mend replacing batteries every 2 years. If the home is going  
to be unoccupied for an extended period (over 3 months),  
the batteries should be replaced before leaving. When the  
batteries are low, pressing any button will cause the display  
tooperatedfortenseconds. Aftertenseconds, thedisplaywill  
be blank except for “LO BATT”. You cannot program with low  
batteries, but you can override setpoint temperature. After  
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.  
LO BATT” has been displayed for 4 weeks, the thermostat  
will raise the temperature 10 degrees above your setpoint in  
COOL mode and will drop the temperature 10 degrees below  
your setpoint in 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.  
EXAMPLE: For the last 2 hours the thermostat is set on 70° and  
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.  
Symptom  
Possible Cause  
Corrective Action  
No Heat/No Cool/No Fan  
1. Blown fuse or tripped circuit breaker.  
2. Furnace power switch to OFF.  
Replace fuse or reset breaker.  
Turn switch to ON.  
(
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.  
No Heat  
1. Pilot light not lit.  
Re-light pilot.  
2
3
4
. SYSTEM button not set to HEAT.  
Press SYSTEM button 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.  
. Loose connection to thermostat or  
system.  
. Furnace Lock-Out Condition. Heat  
may also be intermittent.  
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TROUBLESHOOTING  
Symptom  
Possible Cause  
Corrective Action  
No Heat (continued)  
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  
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 Cool  
1. SYSTEM button not pressed to COOL. Press SYSTEM button to COOL and lower setpoint  
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
2
3
. Possible short in wiring.  
. Possible short in thermostat.  
. 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  
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  
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)  
Thermostat Setting &  
Thermostat Thermometer  
Disagree  
1. Thermostat thermometer setting  
requires adjustment.  
The thermometer can be adjusted +/- 4 degrees.  
See Temperature Display Adjustment in the  
Configuration Menu section.  
Blank Display and/or  
1. Voltage spike or static discharge.  
Use the Reset Operation at top of previous page.  
Keypad Not Responding  
Heat Setpoint will  
not Respond to the  
Temperature Up Key  
1. The desired setpoint conflicts with the Change system mode to COOL. Raise the Cool  
setpoint. Return to HEAT mode and set desired  
setpoint of the COOL mode.  
temperature.  
Cool Setpoint will  
not Respond to the  
Temperature Down Key  
1. The desired setpoint conflicts with the Change system mode to HEAT. Lower the Heat  
setpoint. Return to COOL mode and set desired  
setpoint of the HEAT mode.  
temperature.  
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TROUBLESHOOTING  
Symptom  
Possible Cause  
Corrective Action  
Forgot Keypad  
Lockout Code  
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.  
Why won't my 2nd or 3rd First Stage is keeping up with  
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.  
stage come on?  
demand  
FAQ  
Symptom  
Corrective Action  
My thermostat is reading in Celsius.  
How do I change it to Fahrenheit?  
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 display light does not work. Can it be  
fixed or replaced?  
Because it is soldered to the circuit board it is not possible to repair or  
replace.  
My setpoint temperature is flashing.  
What does that mean?  
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.  
How can I get a copy of the Operating  
Manual for my thermostat?  
Visit our website at www.white-rodgers.com for operating manuals.  
10  
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NOTES  
11  
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HOMEOWNER HELP LINE: 1-800-284-2925  
The Emerson logo is a  
trademark and service mark  
of Emerson Electric Co.  
St. Louis, Missouri  
Markham, Ontario  
www.white-rodgers.com  

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