Emerson 850 Thermostat User Manual

Home

href="
CONTENTS  
Preparations.................................................. 1  
Thermostat Details ........................................ 1  
Removing Old Thermostat ............................ 1  
Mounting and Wiring ..................................... 2  
Check Thermostat Operation ........................ 4  
Specifications ................................................ 7  
Troubleshooting ............................................ 7  
Installation Instructions for  
Heating & Cooling  
Digital Model 850  
5
/1/1 Day Programmable  
Thermostat  
YOUR THERMOSTAT REPLACES  
PREPARATIONS  
1
Description  
850  
Assemble tools required as shown below.  
Standard Heat & Cooling Systems 4 or 5 wires  
Standard Heat Only Systems  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
Yes  
No  
Millivolt Heat Only Systems Floor or Wall Furnaces  
Standard Central Air Conditioning  
FLAT BLADE SCREWDRIVER  
WIRE CUTTER/STRIPPER  
HAND OR POWER  
DRILL WITH 3/16 INCH  
DRILL BIT, IF NEEDED  
Gas or Oil Heat  
Electric Furnace  
Hydronic (Hot Water) Zone Heat 2 Wires  
Hydronic (Hot Water) Zone Heat 3 Wires  
Heat Pump (No Aux or Emergency Heat)  
Heat Pump (with Aux or Emergency Heat)  
Baseboard Electric Heating or Line Voltage (120 or 240 volt)  
SPIRIT LEVEL OR PLUMB BOB AND LINE (OPTIONAL)  
Yes  
No  
Failure to follow and read all instructions carefully  
before installing or operating this control could cause  
personal injury and/or property damage.  
No  
2 THERMOSTAT DETAILS  
3 REMOVING OLD THERMOSTAT  
CAUTION  
!
To prevent electrical shock and/or equipment damage,  
disconnect electrical power to the system at the main  
fuse or circuit breaker until installation is complete.  
Screw anchors  
Before removing wires from old thermostat’s switching subbase,  
label each wire with the terminal designation it was removed from.  
1. 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  
themountingscrewsthatholditonthewalloradaptorplate.  
2. Shut off electricity at the main fuse box until installation is  
Mounting  
complete. Ensure that electrical power is disconnected.  
Electric/Gas  
holes  
3
. Remove the front cover of the old thermostat. With wires still  
attached,removewallplatefromthewall.Iftheoldthermostat  
has a wall mounting plate, remove the thermostat and the wall  
mounting plate as an assembly.  
switch  
Mounting  
holes  
Figure 1. Thermostat base  
4
5
6
. Identifyeachwireattachedtotheoldthermostatusingthe  
labels enclosed with the new thermostat.  
. Disconnectthewiresfromtheoldthermostatoneatatime.DO  
NOT LET WIRES FALL BACK INTO THE WALL.  
. Install new thermostat using the following procedures.  
PART NO. 37-6295B  
White-Rodgers is a division  
of Emerson Electric Co.  
Replaces 37-6295A  
0514  
www.white-rodgers.com  
href="
REMOVING OLD THERMOSTAT  
CONTINUED FROM FIRST PAGE  
3
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.  
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 not  
touch any spilled mercury. Wearing non-absorbent gloves, take  
up the spilled mercury and place into a container which can be  
sealed. If a cell becomes damaged, the unit should be discarded.  
TERMINAL CROSS REFERENCE CHART  
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 for proper disposal.  
New Thermostat  
Other Manufacturers’  
Terminal Designation  
Terminal Designation  
*
*
RH  
RC  
G
4
R
G
W
Y
RH  
R
M
V
F
R5  
-
R
-
4 MOUNTING AND WIRING  
G
G
4
G
W
Y
W
W
Y
H
C
Y
Y6  
WARNING  
!
*
These are four-wire, single-transformer systems.  
Factory installed jumper wire between the RH  
and RC terminals must remain in place.  
Do not use on circuits exceeding specified voltage.  
Higher voltage will damage control and could cause  
shock or fire hazard.  
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.  
Attach Thermostat Base to Wall  
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. If necessary, move  
the electric heat switch (see ELECTRIC HEAT SYSTEMS,  
above).  
Thermostat installation and all components of the sys-  
tem shall conform to Class II circuits per the NEC code.  
2
. Connect wires beneath terminal screws on base using appro-  
priate wiring schematic (see figs. 2 through 7).  
Electric Heat or Single Stage  
Heat Pump Systems  
3. Placebaseoverholeinwallandmarkmountingholelocations  
on wall using base as a template.  
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 your system is an electric  
or heat-pump system that REQUIRES the thermostat to turn on  
the fan on a call for heat, locate the GAS/ELECTRIC switch (see  
fig. 1) and switch it to the ELECTRIC position. This will allow the  
thermostattoenergizethefanimmediatelyonacallforheat.Ifyou  
are unsure if the heating/cooling system requires the thermostat  
to control the fan, contact a qualified heating and air conditioning  
service person.  
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 appear-  
ance 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 base.  
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.  
Hydronic (Hot Water or Steam)  
Heating Systems  
Battery Location  
Thisthermostatissettooperateproperlywithaforced-airheating  
system. If you have a hydronic heating system (a system that  
heats with hot water or steam), you must set the thermostat to  
operate properly with your system. Change the second option in  
the configuration menu to SL (see CONFIGURATION MENU,  
page 5).  
Thisthermostatrequires2AAalkalinebatteriestooperate.Ifthe  
word LO BATTERY is displayed, the batteries are low and should  
be replaced with fresh AA Energizer alkaline batteries. To  
replacethebatteries, installthebatteriesalongthetopofthebase  
(see fig. 1). The batteries must be installed with the positive(+)  
ends to the right.  
®
www.white-rodgers.com  
href="
MOUNTING AND WIRING  
CONTINUED FROM SECOND PAGE  
4
THERMOSTAT  
SYSTEM  
Hot  
C
B
O
Y
G
W
RC  
RH  
JUMPER  
WIRE  
Cooling  
System Relay System  
Fan  
Heating  
2
4 VAC  
120 VAC  
Neutral  
THERMOSTAT  
SYSTEM  
C
B
O
Y
G
W
RC  
RH  
HEATING  
TRANSFORMER  
Fan  
Relay  
Heating  
System  
Hot  
Hot  
24 VAC  
120 VAC  
Neutral  
24 VAC  
120 VAC  
Neutral  
NOTE  
For 2-wire Heat only,  
attach to RH and W  
COOLING TRANSFORMER  
TRANSFORMER  
Figure 2. Typical wiring diagram for  
heat only, 3-wire, single transformer systems  
Figure 5. Typical wiring diagram for  
heat/cool, 5-wire, two-transformer systems  
JUMPER  
WIRE  
JUMPER  
WIRE  
JUMPER  
WIRE  
THERMOSTAT  
THERMOSTAT  
SYSTEM  
C
B
O
Y
G
W
RC  
RH  
C
B
O
Y
G
W
RC RH  
SYSTEM  
Cooling  
System Relay  
Fan  
Reversing Compressor Fan  
Valve* Contactor Relay  
Hot  
Hot  
2
4 VAC  
120 VAC  
Neutral  
24 VAC  
120 VAC  
Neutral  
* Reversing valve is energized when the  
system switch is in the COOL position  
TRANSFORMER  
TRANSFORMER  
Figure 3. Typical wiring diagram for  
cool only, 3-wire, single transformer systems  
Figure 6. Typical wiring diagram for heat pump  
with reversing valve energized in COOL  
NOTE  
RED jumper wire (provided with thermostat) must be  
connected between thermostat RH and RC terminals  
for proper thermostat operation with this system.  
JUMPER  
WIRE  
JUMPER  
WIRE  
JUMPER  
WIRE  
THERMOSTAT  
SYSTEM  
C
B
O
Y
G
W
RC RH  
THERMOSTAT  
SYSTEM  
C
B
O
Y
G
W
RC RH  
Cooling  
System Relay  
Fan  
Heating  
System  
Hot  
Reversing Compressor Fan  
Valve* Contactor Relay  
Hot  
24 VAC  
120 VAC  
Neutral  
24 VAC  
120 VAC  
*
Reversing valve is energized when the  
system switch is in the HEAT position  
Neutral  
TRANSFORMER  
TRANSFORMER  
Figure 7. Typical wiring diagram for heat pump  
with reversing valve energized in HEAT  
Figure 4. Typical wiring diagram for  
heat/cool, 4-wire, single transformer systems  
The 24 Volt neutral connection to terminal C on the  
thermostat is not required if the batteries are replaced  
once a year with fresh AA Energizer alkaline batteries.  
®
www.white-rodgers.com  
href="
5
CHECK THERMOSTAT OPERATION  
If at any time during testing your system does not operate  
properly, contact a qualified service person.  
Turn on power to the system.  
Fan Operation  
If your system does not have a G terminal connection, skip to  
Heating System.  
1. Move FAN switch to ON position. The blower should begin  
to operate.  
2. Move FAN switch to AUTO position. The blower should  
stop immediately.  
Heating System  
1
2
3
. MoveSYSTEMswitchtoHEATposition. Iftheheatingsystem  
has a standing pilot, be sure to light it.  
. Press  
to adjust thermostat setting above room tempera-  
ture. The heating system should begin to operate.  
. Press  
to adjust temperature setting below room tempera-  
ture. The heating system should stop operating.  
Cooling System  
The Display  
CAUTION  
9
Indicates day of the week.  
!
To prevent compressor and/or property damage, if the  
outdoortemperatureisbelow50°F, DONOToperatethe  
cooling system.  
Flame icon ( ) is displayed when the SYSTEM switch is in  
the HEAT position. Snowflake icon ( )is displayed (non-  
flashing) when the SYSTEM switch is in the COOL position.  
Snowflake is displayed (flashing) if the thermostat is in  
lockout mode to prevent the compressor from cycling too  
quickly.  
10  
1
. Move SYSTEM switch to COOL position.  
2
. Press  
to adjust thermostat setting below room tempera-  
ture. The blower should come on immediately on high speed,  
followed by cold air circulation  
1
1
2
Displays “BATT” when the 2 AAbatteries are low and  
should be replaced. Only “BATT” with “LO” in the minutes  
field are displayed when batteries are low with no system  
power.  
3
. Press  
toadjusttemperaturesettingaboveroomtempera-  
ture. The cooling system should stop operating.  
1
Alternately displays current time and temperature. Displays  
LO” in the minutes field when batteries are low.  
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.  
13 The word “HOLD” is displayed when the thermostat is in the  
HOLD mode. “HOLD” is displayed flashing when the ther-  
mostat is in a temporary HOLD Mode.  
14  
Displayscurrentlyprogrammedsettemperature(thisisblank  
when SYSTEM switch is in the OFF position).  
15  
DisplaysFLTRwhenthesystemhasrunfortheprogrammed  
filter time period as a reminder to change or clean your air  
filter.  
The Thermostat Buttons and Switches  
CONFIGURATION MENU  
The configuration menu allows you to set certain thermostat  
operating characteristics to your system or personal require-  
ments.  
1
Raises temperature setting.  
Lowers temperature setting.  
TIME button.  
2
3
4
5
6
7
Press RUN to make sure the thermostat is in the run program  
mode, then press PRGM and RUN at the same time to enter the  
configuration menu. The display will show the first item in the  
configuration menu.  
PRGM (program) button.  
RUN (run program) button.  
HOLD temperature button.  
FAN switch (ON, AUTO).  
SYSTEM switch (COOL, OFF, HEAT).  
The configuration menu table summarizes the configuration  
options. An explanation of each option follows.  
Press HOLD to change to the next menu item or press TIME to go  
backwards to the previous item in the menu. To exit the menu and  
return to the program operation, press RUN. If no keys are  
pressedwithinfifteenminutes, thethermostatwillreverttonormal  
operation.  
8
www.white-rodgers.com  
href="
5
) Select filter replacement run time - The thermostat will  
display FLTRafter a set time of operation. This is a  
reminder to change or clean your air filter. This time can be  
set from 0 to 1950 hours in 50 hour increments. A selection  
of 000 will cancel this feature. When FLTRis displayed,  
you can clear it by pressingHOLD and RUNat the same time.  
This resets the timer and starts counting the hours until the  
next filter change. Changing the time in the menu also resets  
the timer.  
5
CHECK THERMOSTAT OPERATION  
CONTINUED FROM FOURTH PAGE  
1
) Select Temporary Hold Time - The thermostat can hold any  
temperature you set it to for the amount of time you select on  
this option. Your choices are 0:00 to 8:00 hours in 15 minute  
increments. 0:00 disables the function  
Example:  
1
. Youhaveselected3:00hoursfortheTemporaryHoldtime  
period.  
6) Select Compressor Lockout LOC OFF or ON - Selecting  
LOC 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 cycles. This is intended to help protect the compres-  
sor from short cycling. Some newer compressors already  
have a time delay built in and do not require this feature. Your  
compressor manufacturer can tell you if the feature is already  
present in their system. When the compressor time delay  
occurs it will flash the (snowflake icon) for about five minutes  
then turn on the compressor.  
2
. With the thermostat set to HEAT or COOL, press HOLD  
forapproximatelyfivesecondsuntilHOLDtime(3:00  
indicating 3 hours) appears as a setting reminder.  
3. After releasing the button, 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 HOLDblinking to remind you it is in Tempo-  
rary Hold. After 3 hours the thermostat will go back to the  
program temperature and HOLDwill no longer blink or  
display.  
7
) Select Temperature Display Adjustment 4 LO to 4 HI -  
Allows you to adjust the room temperature display 4° higher  
or lower. Your thermostat was accurately calibrated at the  
factory but you have the option to change the display tem-  
perature to match your previous thermostat.  
2
) Select FA or SL (Fast or Slow) Heating Cycle Rate - The  
FA setting is frequently used for gas, oil or electric heat. The  
SL setting produces a longer heating cycle which is normally  
for hot water or steam (hydronic) systems. Both settings  
produce very accurate temperature control and can be set to  
your personal preference. FA cycles the system just under  
8) Select F° or C° Readout - Changes the display readout to  
Centigrade or Fahrenheit as required.  
1
°F and the SL setting cycles at approximately 1.5°F.  
OPERATING FEATURES  
3
4
) Select backlit display - The display backlight improves  
displaycontrastinlowlightingconditions. Selectingbacklight  
ON will keep the light on for a short period of time after any  
key is pressed. Selecting OFF will keep the light off.  
Now that you are familiar with the thermostat buttons and display,  
read the following information to learn about the many features of  
the thermostat.  
) SelectEnergyManagementRecoveryOFForON-Energy  
Management Recovery (EMR) causes the thermostat 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.  
SIMULTANEOUSHEATING/COOLINGPROGRAMSTOR-  
AGEWhenprogramming, youcanenterbothyourheating  
and cooling programs at the same time. There is no need to  
reprogram the thermostat at the beginning of each season.  
TEMPERATURE OVERRIDE Press  
or  
until the  
display shows the temperature you want. The thermostat will  
override current programming and keep the room tempera-  
tureattheselectedtemperatureuntilthenextprogramperiod  
begins. Then the thermostat will automatically revert to the  
program.  
Example: You select EMR and have your heating pro-  
grammed to 65° at night and 70° at 7 AM. If the building  
temperature 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.  
Configuration Menu  
Step  
Press Button(s)  
Displayed �  
Press  
or  
to select:  

Comments  
(Factory Default)  
1
2
3
4
5
6
7
8
9
PRGM and RUN  
HOLD*  
HOLD (0:00)  
(FA)  
0 to 8 hrs (in 15 minute increments)  
Select temporary Hold time  
SL  
Select FA or SL (Fast or Slow) heating cycle rate  
Select display backlight OFF or ON  
HOLD*  
d-L (ON)  
E (ON)  
OFF  
HOLD*  
OFF  
Select Energy Management Recovery OFF or ON  
Select filter replacement run time  
HOLD*  
Filter (000)  
LOC (OFF)  
0 HI (0)  
(F)  
0 to 1950 hours (in 50 hour increments)  
HOLD*  
ON  
4 LO to 4 HI  
C
Select compressor lockout OFF or ON  
Select temperature display adjustment higher or lower  
Select temperature display to F or C  
Returns to normal operation  
HOLD*  
HOLD*  
RUN  
*
Press HOLD to advance to next item or TIME to move backwards to previous item  
www.white-rodgers.com  
href="
Set Current Time and Day  
5
CHECK THERMOSTAT OPERATION  
CONTINUED FROM FIFTH PAGE  
1. Press TIME button once. The display will show the hour only.  
HOLD TEMPERATURE The thermostat can hold any  
temperature within its range for an indefinite period without  
revertingtotheprogrammedtemperature.Momentarilypress  
HOLD button. HOLD will be displayed. Then choose the  
EXAMPLE:  
PM  
2
. Press and hold either  
or  
until you reach the correct  
hour and AM/PM designation (AM begins at midnight; PM  
desiredtemperaturebypressing  
or  
. Thethermostat  
begins at noon).  
will hold the room temperature at the selected setting until  
you press RUN button to start program operation again.  
3
. Press TIME once. The display window will show the minutes  
only.  
CONFIGURATION MENU Allows you to customize cer-  
tain thermostat options.  
EXAMPLE:  
PROGRAMMINGYOUR THERMOSTAT  
6
4. Press and hold either  
minutes.  
or  
until you reach the correct  
This section will help you plan your thermostats program to meet  
your needs. For maximum comfort and efficiency, keep the  
following guidelines in mind when planning your program.  
5. Press TIME once. The display will show the day of the week.  
. Press or until you reach the current day of the week.  
6
When heating (cooling) your building, program the tempera-  
tures to be cooler (warmer) when the building is vacant or  
during periods of low activity.  
7. Press RUN once. The display will show the correct time and  
room temperature alternately.  
Enter Heating Program  
During early morning hours, the need for cooling is usually  
minimal.  
1. Move the SYSTEM switch to HEAT.  
Look at the factory preprogrammed times and temperatures shown  
below. 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.  
2. Press PRGM once. MO TU WE TH FR (indicating weekday  
program) will appear in the display. Also displayed are the  
currently programmed start time for the 1st heating period and  
the currently programmed temperature (flashing).  
MO TU WE TH FR  
Determine the time periods and temperatures for your weekday  
and weekend programs. You must program four periods for both  
the weekday and weekend program. 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 both weekday and week-  
end programs (for example, you may select 5:00 AM and 70° as  
the weekday 1st period heating start time and temperature, and  
also choose 7:00 AM and 76° as the weekday 1st period cooling  
start time and temperature). Use the table at the bottom of the  
pagetoplanyourprogramtimeperiodsandthetemperaturesyou  
want during each period. You may also want to look at the sample  
program table to get an idea of how the thermostat can be  
programmed.  
AM  
EXAMPLE:  
This display window shows that for the 1st weekday period,  
the start time is 6:00 AM, and 70° is the programmed tempera-  
ture (this example reflects factory preprogramming).  
3
. Press  
or  
tochangethedisplayedtemperaturetoyour  
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 dis-  
played, 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 heating program period will  
appear.  
Entering Your Program  
Follow these steps to enter the heating and cooling programs you  
have selected.  
6. Repeat steps 3 through 5 to select the start time and heating  
temperature for the 2nd heating program period.  
SAMPLE  
SAMPLE  
Heating/Cooling Schedule Plan (Factory Program)  
Heating/Cooling Schedule Plan (Factory Program)  
WEEKDAY (5 DAY)  
SATURDAY (1 DAY)  
SUNDAY (1 DAY)  
WEEKDAY (5 DAY)  
SATURDAY (1 DAY)  
SUNDAY (1 DAY)  
Start  
Time  
Start  
Time  
Start  
Time  
Start  
Time  
Start  
Time  
Start  
Time  
Period  
Temperature  
70˚F  
Temperature  
70˚F  
Temperature  
70˚F  
Period  
1ST  
Temperature  
Temperature  
Temperature  
1
2
3
4
1
2
3
4
ST  
6:00 AM  
6:00 AM  
6:00 AM  
ND  
RD  
TH  
ST  
ND  
RD  
TH  
8:00 AM  
5:00 PM  
10:00 PM  
6:00 AM  
8:00 AM  
5:00 PM  
10:00 PM  
62˚F  
70˚F  
62˚F  
78˚F  
85˚F  
78˚F  
82˚F  
8:00 AM  
5:00 PM  
10:00 PM  
6:00 AM  
8:00 AM  
5:00 PM  
10:00 PM  
62˚F  
70˚F  
62˚F  
78˚F  
85˚F  
78˚F  
82˚F  
8:00 AM  
5:00 PM  
10:00 PM  
6:00 AM  
8:00 AM  
5:00 PM  
10:00 PM  
62˚F  
70˚F  
62˚F  
78˚F  
85˚F  
78˚F  
82˚F  
2ND  
3RD  
4TH  
1ST  
2ND  
3RD  
4TH  
www.white-rodgers.com  
href="
1
. Move SYSTEM switch to COOL position.  
PROGRAMMINGYOUR THERMOSTAT  
CONTINUED FROM SIXTH PAGE  
6
2. Followtheprocedureforenteringyourheatingprogram, using  
your selected cooling times and temperatures.  
7
. Repeat steps 3 through 5 for the 3rd and 4th heating program  
periods. Weekday heating programs are now complete.  
Check Your Programming  
Follow these steps to check your thermostat programming one  
final time before beginning thermostat operation.  
. Move SYSTEM switch to HEAT position.  
8
. Press PRGM once. SA will appear in the display, along with  
the start time for the 1st heating period and the currently  
programmed temperature for Saturday.  
1
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 displayed in sequence for  
weekday, then weekend program periods (you may change  
any time or temperature during this procedure).  
9. Repeat steps 3 through 7 to complete Saturday heating  
programming.  
1
0.Press PRGM once. SUwill appear on the display along with  
start time and currently programmed temperature for the 1st  
heating period for Sunday. Repeat steps 3 through 7 to  
complete Sunday heating programming.  
3
4
5
6
. Press RUN.  
. Move SYSTEM switch to COOL position.  
. Repeat step 2 to check cooling temperatures.  
. Press RUN to begin program operation.  
11.When you have completed entering your heating program,  
press RUN.  
YOURTHERMOSTATISNOWCOMPLETELYPROGRAMMED  
ANDREADYTOAUTOMATICALLYPROVIDEMAXIMUMCOM-  
FORT AND EFFICIENCY!  
Enter Cooling Program  
If the outside temperature is below 50°F, disconnect  
power to the cooling system before programming. En-  
ergizing the air conditioner compressor during cold  
weathermaycausepersonalinjuryorpropertydamage.  
7 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  
0
0
1
to 30 VAC 50/60 Hz. or D.C.  
.05 to 1.2 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  
-
TROUBLESHOOTING  
8
Reset Operation  
has been reset and still does not function correctly contact your  
heating/cooling service person or place of purchase.  
If a voltage spike or static discharge blanks out the display or  
causes erratic thermostat operation you can reset the thermostat  
Batteries  
by pressing and TIME at the same time. This resets the  
,
For optimum performance, we recommend replacing batteries  
thermostat to the factory defaults. If the thermostat has power,  
®
once a year with fresh AA Energizer alkaline batteries.  
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. SYSTEM Switch not set to HEAT.  
Set SYSTEM Switch to HEAT and raise temperature  
above room temperature.  
3. Loose connection to thermostat or system.  
Verify thermostat and system wires are securely  
attached.  
4. Furnace Lock-Out Condition. Heat may also  
be intermittent.  
Many furnaces have safety devices that shut  
down when a lock-out condition occurs. If the  
heat works intermittently contact the furnace  
manufacturer or local service person for  
assistance.  
www.white-rodgers.com  
href="
TROUBLESHOOTING  
CONTINUED FROM SEVENTH PAGE  
8
Symptom  
Possible Cause  
Corrective Action  
No Heat (continued)  
5. Heating system requires service or  
thermostat requires replacement.  
Diagonistic: 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 below.  
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 Switch not set to COOL.  
Set SYSTEM Switch to COOL and lower temperature  
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.  
Heat, Cool or Fan Runs Constantly.  
1. FAN Switch set to Fan ON.  
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 below. If the condition  
persists the manufacturer of your system or  
2
3
4
. Possible short in wiring.  
. Possible short in thermostat.  
. Possible short in heat/cool/fan system.  
service person can instruct you on how to test the  
Heat/Cool system for correct operation. If the  
system operates correctly, replace the thermostat.  
Furnace Cycles Too Fast or Too Slow  
narrow or wide temperature swing)  
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, clip Jumper W-905 as  
mentioned in the instructions for Hydronic Heating  
Systems. It is not possible to shorten the cycle  
time. If an acceptable cycle rate is not achieved as  
received or by clipping W-905 contact a local  
service person for additional suggestions.  
Cooling Cycles Too Fast or Too Slow  
narrow or wide temperature swing)  
1. The location of the thermostat and the size  
of the Cooling System can influence the  
cycle rate.  
The cycle rate for cooling is fixed and can not be  
adjusted. Contact a local service person for  
suggestions.  
(
Thermostat Setting and Thermostat  
Thermometer Disagree  
1. Thermostat thermometer setting requires  
adjustment.  
The thermometer can be adjusted +/- 3 degrees.  
See Temperature Display Adjustment in the  
Operation section.  
Thermostat Does Not Follow Program  
1. AM or PM set incorrectly in program.  
Check current clock and program settings  
including the AM or PM designations for each  
time period. If a voltage spike or a static discharge  
occurs use the Reset Operation listed below.  
2. AM or PM set incorrectly on the clock.  
3. Voltage spike or static discharge.  
Blank Display and/or Keypad  
Not Responding  
1. Voltage spike or static discharge.  
2. Battery change required.  
Replace batteries and check heat/cool system  
for proper operation. If a voltage spike occurs use  
the Reset Operation listed below.  
The Emerson logo is a  
trademark and a service mark  
of Emerson Electric Co.  
www.white-rodgers.com  

Honeywell Q674C Thermostat User Manual

White Rodgers 2.00E+158 Thermostat User Manual

Honeywell T8601 Thermostat User Manual

Bryant TSTATBBNAC01 C Thermostat User Manual

Honeywell Q539C Thermostat User Manual

White Rodgers 1F80 71 Thermostat User Manual

Lux Products LV11 Thermostat User Manual

White Rodgers 9725I2 Thermostat User Manual

Honeywell T8095A Thermostat User Manual

Honeywell T8621A Thermostat User Manual