White Rodgers 1F92W 51 Thermostat User Manual

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INSTALLATION &  
OPERATION GUIDE  
1F92W-51  
Multi-stage/Heat Pump Electronic  
Digital Thermostat  
WHITE-RODGERS  
Operator: Save this booklet for future use!  
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About Your New Thermostat . . .  
Your new White-Rodgers Digital Multi-stage/Heat Pump Thermostat uses the technology of a solid-state  
microcomputer to provide precise time/temperature control. This thermostat offers you the flexibility to  
design heating and cooling programs that fit your needs.  
Please read this manual thoroughly before operating or programming your thermostat. If you have  
questions, contact us at the address shown on the back cover of this manual.  
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In This Guide . . .  
YOUR NEW THERMOSTAT’S  
OPERATING YOUR THERMOSTAT ............... 22  
PARTS OF THE THERMOSTAT  
The Back Of the Thermostat Body  
The Display  
FEATURES .................................................. 4  
PRECAUTIONS ................................................. 5  
THE THERMOSTAT’S SPECIFICATIONS ....... 6  
INSTALLING YOUR THERMOSTAT ................ 7  
NEW INSTALLATION  
The Thermostat Buttons  
OPERATING FEATURES  
Select Thermostat Location  
PROGRAMMING YOUR  
Route Wires to Location  
REPLACEMENT INSTALLATION  
Remove Old Thermostat  
THERMOSTAT........................................... 34  
PLANNING FOR YOUR NEEDS  
ENTERING YOUR PROGRAM  
Set Current Time and Day  
Attach Subbase to Wall  
SYSTEM CONFIGURATON  
Enter Heating Program  
Set Option Switches  
Enter Cooling Program  
CHECK THERMOSTAT OPERATION  
Fan Operation  
CHECK YOUR PROGRAMMING  
QUESTIONS AND ANSWERS ........................ 44  
Heating System Operation  
Cooling System Operation  
LOCKOUT BYPASS OPTION  
Compressor Long Term Cycle Protection  
Compressor Short Term Cycle Protection  
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YOUR NEW THERMOSTAT’S FEATURES  
• Five-day/two-day programming capability  
• Adjustable cycle times  
• Simultaneous heat and cool program storage  
• 9 volt Energizer® alkaline battery backup  
• Compressor long term cycle protection  
• Compressor short cycle protection  
• Blower delay in the cooling cycle  
• Preprogrammed temperature control  
• Visual prompting during operation  
• Programmable blower control  
• Temperature range 40° to 99°F  
°F/°C convertibility  
• Four separate time and temperature settings  
per 24-hour period  
• Up to 2 stages of heat and up to 1 stage of cool  
• Computed Energy Management Recovery  
(EMR)  
• Automatic changeover (operator selectable)  
• Two hour temperature override  
• Manual program override (HOLD temperature)  
• “Advance Program” button  
• Electric Heat (installer-selectable)  
• Armchair programming capability  
• LCD displays continuous setpoint, time, and  
room temperature  
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PRECAUTIONS  
If in doubt about whether your wiring is millivolt, line,  
WARNING  
!
or low voltage, have it inspected by a qualified  
heating and air conditioning contractor, electrician,  
or someone familiar with basic electricity and wiring.  
Do not use on circuits exceeding specified  
voltage. Higher voltage will damage control  
and could cause shock or fire hazard.  
Do not exceed the specification ratings.  
Do not short out terminals on gas valve or  
primary control to test. Short or incorrect  
wiring will burn out thermostat and could  
cause personal injury and/or property  
damage.  
All wiring must conform to local and national electri-  
cal codes and ordinances.  
This control is a precision instrument, and should be  
handledcarefully.Roughhandlingordistortingcom-  
ponents could cause the control to malfunction.  
CAUTION  
!
To prevent electrical shock and/or equip-  
ment damage, disconnect electric power to  
system, at main fuse or circuit breaker box,  
until installation is complete.  
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THE THERMOSTAT’S SPECIFICATIONS  
THIS CONTROL IS DESIGNED FOR USE WHERE BOTH SIDES OF THE TRANSFORMER ARE  
PRESENT AT THE THERMOSTAT (both the hot and common sides of the 24 VAC end of the  
transformer.)  
ELECTRICAL DATA  
Electrical Rating:  
THERMAL DATA  
Setpoint Temperature Range:  
40°F to 99°F (4°C to 37°C)  
Operating Ambient Temperature Range:  
32°F to 105°F  
Operating Humidity Range:  
0 to 90% RH (non-condensing)  
Shipping Temperature Range:  
-40°F to 150°F  
20 to 30 VAC 50/60 Hz.  
0.01 to 1.5 Amps (Load per terminal)  
2.5 Amps Maximum Total Load (All terminals  
combined)  
Anticipation:  
Heating 4 to 40  
Cooling 4 to 40  
Auxiliary 4 to 40  
ACCESSORIES  
STAGING DATA  
Thermostat Guard:  
Up to 3 heating stages  
Up to 1 cooling stage  
W. R. Part No. F29-0198 (clear)  
or F29-0238 (opaque)  
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INSTALLING YOUR THERMOSTAT  
4. Avoid locations close to windows, adjoining out-  
NEW INSTALLATION  
side walls, or doors that lead outside.  
WE RECOMMEND THAT YOU PROGRAM THE  
THERMOSTAT WITH BATTERY INSTALLED BE-  
FORE ATTACHING ON SUBBASE. SEE OPERA-  
TION SECTION FOR PROGRAMMING INSTRUC-  
TIONS.  
5. Avoid locations close to air registers or in the  
direct path of air from them.  
6. Make sure there are no pipes or duct work in that  
part of the wall chosen for the thermostat loca-  
tion.  
SELECT THERMOSTAT LOCATION  
7. Never locate thermostat in a room that normally  
warmer or cooler than the rest of the building.  
Proper location insures that the thermostat will  
provide a comfortable building temperature. Ob-  
serve the following general rules when selecting  
a location:  
8. Avoid locations with poor air circulation, such as  
behind doors or in alcoves.  
ROUTE WIRES TO LOCATION  
1. Locate thermostat about 5 ft. above the floor.  
2. Installthermostatonapartitioningwall, notonan  
outside wall.  
NOTE  
All wiring must conform with local and national  
electrical codes and ordinances.  
3. Never expose thermostat to direct light from  
lamps, sun, fireplacesoranytemperatureradiat-  
ing equipment.  
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1. Probe for obstructions in partition before drilling  
1
⁄ ” hole for  
2
1
2  
” hole in wall at selected location. Take up  
quarter round and drill a small guide hole for  
sighting(seefig. 1). Frombasement, drill3⁄  
hole  
in partition floor next to guide hole. In buildings  
without basements, drill 1⁄  
” hole through ceiling  
thermostat wire  
4
Stout cord with 6”  
chain attached  
Approximately  
5 feet from floor  
Baseboard  
strip moulding  
2
1
⁄ ” guide hole  
4
and into partition from above (see fig. 1).  
for sighting  
Quarter round  
removed  
2. Through this hole drop a light chain, or 6” chain  
attachedtoastrongcord.Snagcordinbasement  
with hooked wire. In buildings without base-  
ments, drop cord through hole in ceiling and  
down partitioning; snag cord at the thermostat  
location.  
3
⁄ ” hole in floor of partition  
4
Hooked wire for snagging chain  
3. Attach thermostat wires to cord and pull wires  
through hole in wall so that 6” of wire comes out  
of the wall.  
Figure 1. Routing thermostat wires  
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REPLACEMENT INSTALLATION  
REMOVE OLD THERMOSTAT  
TABLE 1. WIRE IDENTIFICATION LABELS  
1. Shutoffelectricityatthemainfuseboxuntil  
installation is complete. Verify power is off  
with a voltmeter.  
1
G
2
3
L
4
R
5
O
6
B
7
E1  
8
E2  
C
2. Remove the front cover of the old thermo-  
stat. With wires still attached, remove  
wall plate from the wall.  
G
1
C
2
L
3
R
4
O
5
B
6
E1  
7
E2  
8
11  
W1  
9
Y1  
10  
Y2  
12  
W2  
13  
W3  
14  
S1  
15  
S2  
16  
S3  
3. If the old thermostat has a wall mounting  
plate, remove the thermostat and the wall  
mounting plate as an assembly.  
W1  
11  
Y1  
9
Y2  
10  
W2  
12  
W3  
13  
S1  
14  
S2  
15  
S3  
16  
4. Use the Cross Reference Guide to find the  
thermostat type you are replacing.  
6. Disconnect the wires from old thermostat one at  
a time. Pull at least 6 inches of wire out of the  
wall. DO NOT LET WIRES FALL BACK INTO  
THE WALL.  
5. Identify each wire attached to the old thermo-  
stat using the labels enclosed with the new  
thermostat (see Table 1). Record the identifi-  
cationofthewireonthecorrespondingblank  
in Table 2.  
7. Install new thermostat using the following proce-  
dures.  
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TABLE 2. TERMINAL REFERENCE  
FUNCTION  
NEW THERMOSTAT  
TERMINAL  
OLD THERMOSTAT  
TERMINAL  
LABEL  
NUMBER  
DESIGNATION  
DESIGNATION  
(1)  
(2)  
(3)  
(4)  
(5)  
(6)  
(7)  
G
C
L
R
O
B
Fan Output  
Transformer 24 VAC Common  
(this terminal not used)  
Transformer 24 VAC Hot  
Changeover Output (Cooling)  
Changeover Output (Heating)  
Emergency Heat Relay (cycles on  
1st stage in Emergency Mode)  
Emergency Heat Relay (continually  
energized in Emergency Mode)  
Stage 1 Cool  
E1  
(8)  
E2  
(9)  
Y1  
Y2  
W1  
W2  
W3  
(10)  
(11)  
(12)  
(13)  
(this terminal not used)  
Stage 1 Heat (Compressor)  
Stage 2 Heat (Auxiliary)  
(this terminal not used)  
10  
ATTACH SUBBASE TO WALL  
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 subbase snugly, use plastic expansion  
plugs to secure subbase.  
1. Remove the packing material from the thermo-  
stat. Place the fingers of one hand on the center  
top and bottom portion of the thermostat. Grasp  
the subbase in the other hand on the top and  
bottom center, and gently pull straight out (see  
fig. 2). The thermostat has pin and socket con-  
nectors. Forcing or prying on the thermostat will  
cause damage to the unit.  
6. Push excess wire into wall and plug hole with a  
fire-resistant material (such as fiberglass insula-  
tion) to prevent drafts from affecting thermostat  
operation.  
2. Connect wires beneath terminal screws on sub-  
base using wiring schematic for your particular  
application (see figs. 3 through 6).  
(Instructions continue on page 16).  
3. Place subbase over hole in wall and mark  
mounting hole locations on wall using subbase  
as a template.  
4. Move subbase out of the way. Drill mounting  
holes.  
5. Fasten subbase loosely to wall, as shown in fig.  
3, using two mounting screws. Place a level  
againstbottomofsubbase, adjustuntillevel, and  
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WARNING  
CAUTION  
!
!
DO NOT EXCEED MAXIMUM VOLTAGE OR  
CURRENT RATINGS. FIRE, PERSONAL IN-  
JURY, AND/OR EQUIPMENT DAMAGE  
COULD RESULT.  
To prevent electrical shock and/or equip-  
ment damage, disconnect electrical power  
at the main fuse box until installation is  
complete. Verify power is off with a volt-  
meter.  
Expansion  
plugs  
Connect wires under  
terminal screws  
S3  
S1 S2  
Mounting  
hole  
O
B
Y1  
Y2  
C
W1  
E1  
E2  
L
R
W2  
W3  
4-pin connector  
Mounting  
hole  
G
9-pin connector  
Pull wires through  
this opening  
Figure 3. Subbase  
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NOTE  
The following wiring diagrams show typical terminal iden-  
tification and wiring. For proper installation, refer to the  
original manufacturers' instructions.  
Thermostat  
Control  
Circuit  
THERMOSTAT  
SYSTEM  
B
E1  
W2  
C
R
O
Y1  
G
E2  
W1  
Emergency  
Relay  
Switched  
Output  
Changeover  
Energized  
In Heat  
Heat  
Relay  
Fan  
Relay  
Stage 2  
Hot  
24 VAC  
120 VAC  
Emergency  
Relay  
Constant  
Output  
Heat  
Relay  
Changeover  
Energized  
In Cool  
Compressor  
Contactor  
Stage 1  
Neutral  
TRANSFORMER  
Stage 1  
Figure 4. Typical wiring diagram for single transformer systems  
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NOTE  
IF SAFETY CIRCUITS ARE IN ONLY ONE OF THE  
SYSTEMS, REMOVE THE TRANSFORMER OF THE  
SYSTEM WITH NO SAFETY CIRCUITS.  
Thermostat  
Control  
Circuit  
THERMOSTAT  
SYSTEM  
B
C
O
Y1  
G
E1  
E2  
W2  
W1  
R
CUT AND  
TAPE OFF!  
Emergency  
Relay  
Switched  
Output  
Changeover  
Energized  
In Heat  
Heat  
Relay  
Limit or  
Safety  
Fan  
Hot  
Relay  
Stage 2  
Switches  
120 VAC  
24 VAC  
Limit or  
Safety  
TRANSFORMER  
Emergency  
Relay  
Constant  
Output  
Changeover Compressor  
Heat  
Relay  
Neutral  
TRANSFORMER  
Hot  
Energized  
In Cool  
Contactor  
Stage 1  
Switches  
Stage 1  
120 VAC  
24 VAC  
Neutral  
HEAT PUMP SYSTEM  
AUXILIARY HEATING SYSTEM  
DEPENDING ON SYSTEM REQUIRE-  
MENTS, REPLACE WITH A  
75VA TRANSFORMER, IF NEEDED  
TWO COMMONS MUST  
BE JUMPERED TOGETHER!  
Figure 5. Typical wiring diagram for two transformer systems with NO safety circuits  
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CAUTION  
NOTE  
!
Relay contacts shown are thermostatically operated. The  
accessory relay scheme is required when safety circuits  
exist in both systems.  
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.  
Thermostat  
Control  
Circuit  
THERMOSTAT  
SYSTEM  
B
C
O
Y1  
G
E1  
E2  
W2  
W1  
R
Emergency  
Relay  
Switched  
Output  
Changeover  
Energized  
In Heat  
Limit or  
Safety  
Limit or  
Safety  
Heat  
Fan  
Relay  
Hot  
Relay  
Switches  
Switches  
Stage 2  
24 VAC  
120 VAC  
Neutral  
Emergency  
Relay  
Constant  
Output  
Changeover Compressor  
Heat  
Relay  
24 VAC  
Energized  
In Cool  
Contactor  
Stage 1  
Accessory  
Relay N.O.  
Contact  
AUXILIARY  
HEATING  
Stage 1  
TRANSFORMER  
HEAT PUMP SYSTEM  
AUXILIARY  
HEATING SYSTEM  
HEAT PUMP  
Limit or  
Safety  
Limit or  
Safety  
TRANSFORMER  
Hot  
TWO COMMONS MUST  
BE JUMPERED TOGETHER!  
Switches  
Switches  
24 VAC  
120 VAC  
Neutral  
Figure 6. Typical wiring diagram for two transformer systems with safety circuits in BOTH systems  
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ATTACH THERMOSTAT TO SUBBASE  
snaps lock into place (see fig. 7). Be gentle when  
attaching thermostat. If the thermostat does not  
seem to be attaching to the subbase easily, make  
sure that the connector pins and plastic snaps are  
properlyaligned, andthatexcesswireispushedinto  
the wall. Damage to the thermostat may occur if  
force is used.  
WE RECOMMEND THAT YOU SET OPTION  
SWITCHESTODESIREDPOSITIONBEFOREAT-  
TACHING ON SUBBASE (see OPERATION). WE  
ALSORECOMMEND THATYOUPROGRAMTHE  
THERMOSTAT WITH BATTERY INSTALLED BE-  
FORE ATTACHING ON SUBBASE (see OPERA-  
TION section for programming instructions).  
SYSTEM  
HEAT-OFF-COOL-AUTO  
USE  
TO TURN THERMOSTAT OFF BE-  
FOREATTACHINGTOWALL.FAILURETOTURN  
OFF THERMOSTAT BEFORE ATTACHING TO  
WALL MAY CAUSE EQUIPMENT DAMAGE DUE  
TO RAPID COMPRESSOR CYCLING.  
To attach thermostat to subbase, line up the plastic  
snap guides at the top of the thermostat and the 4  
connector pins on the thermostat with the connec-  
tors near the top right section of the subbase (when  
viewed from the front). Gently pivot the thermostat  
down until the 9-pin connectors and the plastic  
ENGAGE TWO UPPER GUIDES; PIVOT DOWN  
Figure 7. Attaching thermostat to subbase  
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SET OPTION SWITCHES  
SYSTEM CONFIGURATION  
1. Single Stage Compressor Heat Pump — with  
reversing valve energized through B or O termi-  
nals  
NOTE  
ANY TIME AN OPTION SWITCH IS CHANGED,  
THE 9 VOLT ENERGIZER® BATTERY MUST BE  
REMOVED FOR A MINIMUM OF 2 MINUTES.  
W1  
Y1  
Field jumper W1 & Y1  
Battery  
4-pin connector  
ON  
Switch #1 OFF  
Switch #2 OFF  
Switch #3 OFF  
Switch #4 (see step 6)  
1
2
3
4
2. Two Compressor (Split) System  
W1  
Y1  
Field jumper W1 & Y1  
ON  
Switch #1 OFF  
Switch #2 ON  
W18  
Switch #3 OFF  
Switch #4 (see step 6)  
1
2
3
4
Option switches  
9-pin connector  
Figure 8. Back of thermostat  
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3. Multi-stage (Fossil Fuel) System — up to 2 5. Automatic Changeover from Heat to Cool  
heat stages and 1 cool stage  
ON  
Switch #1 (see steps 1-4)  
ON  
Switch #1 ON  
Switch #2 (see steps 1-4)  
Switch #3 (see step 5)  
Switch #4 ON  
Switch #2 OFF  
Switch #3 OFF  
Switch #4 (see step 6)  
1
2
3
4
1
2
3
4
NOTE  
4. Multi-stage (Electric Heat) System — up to 2  
heat stages and 1 cool stage  
The battery maintains the stored program in the  
event of a power failure. When attached to the wall  
with 24 VAC power applied, the thermostat will  
function normally without the battery. However, the  
programwillbelostintheeventofpowerinterruption  
or failure if the battery is not installed. When power  
is restored, the thermostat will automatically main-  
tain a temperature of 64°F or a cooling temperature  
of 82°F (factory preprogrammed) as needed.  
ON  
Switch #1 ON  
Switch #2 ON  
Switch #3 (see step 5)  
Switch #4 (see step 6)  
1
2
3
4
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HEATING SYSTEM OPERATION  
CHECK THERMOSTAT OPERATION  
When checking thermostat, option switch #4 for  
automatic changeover must be in the OFF position.  
This will allow temporary setting of heat set points  
above cool settings. After system checkout, reset  
optionswitchtoONpositionifautomaticchangeover  
is desired (see SET OPTION SWITCHES).  
SYSTEM  
HEAT-OFF-COOL-AUTO  
1. Press  
untilHEATisdisplayed.(Itshould  
already be displayed.)  
2. Press  
to adjust thermostat to 99°F. All  
stages of the heating system should come on  
within approximately five minutes. However, if  
the PUMP LED is flashing, the compressor lock-  
out feature is operating (see Lockout Bypass  
Option to temporarily override the compressor  
lockout feature during testing).  
FAN OPERATION  
1. Turn on power to the system. If the auxiliary heat  
source has a standing pilot, be sure to light it.  
FAN  
– AUTO  
2. Press  
until FAN  
is displayed. The  
ON  
SYSTEM  
HEAT-OFF-COOL-AUTO  
3. Press  
until EMER is displayed. Repeat  
NOTE  
step 2.  
4. To program the thermostat, see PROGRAM-  
MING YOUR THERMOSTAT.  
blower should begin to operate.  
FAN  
3. Press  
until FAN  
is displayed. The  
ON  
– AUTO  
blower should stop operating within approxi-  
mately one minute.  
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COOLING SYSTEM OPERATION  
CAUTION  
pass Option to temporarily override the com-  
pressor lockout feature during testing).  
!
3. To program the thermostat, see PROGRAM-  
MING YOUR THERMOSTAT.  
To prevent compressor and/or property  
damage, if power to the compressor has  
been off or interrupted for more than 1  
hour and the outdoor temperature is be-  
low 50°F, DO NOT operate the system for  
at least the amount of time the compres-  
sor was off! This will allow the compres-  
sor heaters to warm the compressor oils  
to avoid damage due to slugging.  
Afterheatingandcoolingsystemhavebeenchecked  
and are running properly, determine if automatic  
changeover is desired. When option switch #4 is in  
the proper position, automatic changeover is en-  
SYSTEM  
HEAT-OFF-COOL-AUTO  
abled by pressing  
until AUTO is displayed  
(seeSETOPTIONSWITCHES).IntheAUTOmode,  
the setpoint temperature is not displayed.  
SYSTEM  
HEAT-OFF-COOL-AUTO  
1. Press  
until COOL is displayed.  
2. Press  
to adjust thermostat to 40°F. The  
cooling system should come on within approxi-  
mately five minutes. However, if the fan is run-  
ning but the compressor is not, the compressor  
lockout feature is operating (see Lockout By-  
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than the power loss to the unit (up to 12 hours  
maximum lockout). During this time, auxiliary heat  
will be used when necessary to maintain setpoint  
temperature. DO NOT attempt to override this delay  
feature before crankcase temperature has stabi-  
lized (for example, if power has been out for three  
hours, the compressor should remain locked out for  
two hours).  
LOCKOUT BYPASS OPTION  
CAUTION  
!
FOR QUALIFIED SERVICE TECHNICIANS’  
USEONLY.OPERATORSSHOULDNOTUSE  
THIS FEATURE DUE TO POSSIBILITY OF  
EQUIPMENT OR PROPERTY DAMAGE, OR  
PERSONAL INJURY.  
COMPRESSOR SHORT TERM CYCLE  
PROTECTION  
DO NOT USE THE LOCKOUT BYPASS OP-  
TION UNLESS THE COMPRESSOR OIL  
HEATERSHAVEBEENOPERATIONALFOR  
6HOURSANDTHESYSTEMHASNOTBEEN  
OPERATIONAL FOR AT LEAST 5 MINUTES.  
This thermostat has a built-in short term (5-minute)  
time delay. During this 5-minute period, the thermo-  
stat will lock out the compressor to allow head  
pressure to stabilize. If you want to override this  
feature while testing thermostat operation, simply  
COMPRESSOR LONG TERM CYCLE  
PROTECTION  
ADV  
HOLD  
TEMP  
press  
and  
at the same time at initial  
PRGM  
startup.  
To protect the compressor from potential damage  
due to temperature change of crankcase oil, this  
thermostat has a built-in time delay of one hour less  
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OPERATING YOUR THERMOSTAT  
Before you begin programming your new thermo- The subbase is attached to the wall, but you can  
stat, you should be familiar with its features and with remove the thermostat body for easy programming.  
the display and the location and operation of the To remove the thermostat body from the subbase,  
thermostat buttons. The information in this section grasp the thermostat body and gently pull it straight  
willhelpyoubecomefamiliarwithyourthermostatso out from the subbase (see fig. 9). To attach the  
that you can easily program it.  
thermostatbody, lineupthefourterminalpinsonthe  
uppersectionofthethermostatbackwiththematch-  
ing connector on the subbase. Insert these, then  
gentlypivotthethermostatbodydowntoconnectthe  
Your thermostat consists of two parts: the thermo-  
stat body and the subbase.  
CAUTION  
!
SYSTEM  
HEAT-OFF-COOL-AUTO  
Use  
to turn the thermostat OFF  
before removing or attaching the thermo-  
stat body. Equipment damage and/or per-  
sonal injury could occur.  
PULL STRAIGHT OUT  
Figure 9. Removing thermostat from subbase  
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nine pin connectors on the lower portion of the  
thermostat back. Gently push until the snap connec-  
tors engage (see fig. 10). DO NOT FORCE OR PRY  
THE THERMOSTAT, as this may damage the unit.  
PARTS OF THE THERMOSTAT  
The Back of the Thermostat Body  
Turn the thermostat body over. On the back are the  
9 volt Energizer® alkaline battery and the option  
switches.  
1. The 9 volt Energizer® alkaline battery provides  
power to the thermostat when the 24 VAC power  
isinterrupted(forexample,whenyouremovethe  
thermostat from the wall for programming). A  
fresh battery will maintain the stored program for  
approximately one week. If power loss is long  
enoughfortheprogramtobelost, thethermostat  
will automatically maintain a factory prepro-  
grammed heating temperature of 64°F and a  
cooling temperature of 82°F after power is re-  
stored. You must re-program the thermostat if  
this happens.  
ENGAGE TWO UPPER GUIDES; PIVOT DOWN  
Figure 10. Attaching thermostat to subbase  
If the word BAT is flashing in the display window,  
the battery is low and should be replaced with a  
fresh 9 volt Energizer® alkaline battery. The  
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battery will provide power for all functions. If the Following are brief descriptions of the display and  
word BAT is displayed continuously (non-flash- the thermostat buttons.  
ing), the thermostat is not being supplied with 24  
VAC power and is being powered by the battery  
alone.  
The Display  
1
2
Continuously displays system mode (HEAT,  
EMER, OFF, COOL, AUTO, HOLD). During  
programming, the program period is displayed  
(MOR, DAY, EVE, NHT).  
CAUTION  
!
SYSTEM  
HEAT-OFF-COOL-AUTO  
Use  
to turn thermostat OFF before  
Alternately displays room temperature (F de-  
removing thermostat from the wall to re-  
place the battery.  
notes degrees Fahrenheit and C denotes de-  
grees Celsius) and time of day (A denotes AM  
time and P denotes PM time).  
2. You may adjust option switch #4 for automatic  
changeover from heating to cooling (see OPER-  
ATING FEATURES).  
3
4
Displays the setpoint temperature.  
5 DAY indicates that the displayed program is  
the weekday program. 2 DAY indicates that the  
displayed program is the weekend program.  
Other than  
and  
, the buttons are located  
behind the thermostat door. To open the door, use  
your fingernail in the indentation at the top center of  
thedoor. Pullthedoorout, thenswingthedoordown  
on its hinges.  
The word BAT flashes on the display when the  
9 volt alkaline battery is weak and should be  
5
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replaced. The word BAT will be displayed con-  
tinuously (non-flashing) when the thermostat is  
operating on battery power only.  
FAN  
is displayed when the blower is operat-  
ing continuously, regardless of heating or cool-  
ing system cycling. FAN is displayed during  
6
automaticfanoperation(whentheblowercycles  
with the heating or cooling system).  
EMER.  
5
DAY  
FAN  
AUX.  
TIME  
FWD  
SET  
VIEW  
HOLD  
SYSTEM  
HEAT-OFF-COOL-AUTO  
CLOCK  
PRGM  
TEMP  
TIME  
SET  
DAY  
RUN  
ADV  
FAN  
ON - AUTO  
BACK  
PRGM  
PRGM  
1
2
3
3
2
DAY  
FAN  
5
DAY  
BAT  
FAN  
6
4
4
5
2
6
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The Thermostat Buttons and Lights  
Used to initiate or review thermostat program-  
ming.  
12  
7
8
Sets the system mode (HEATing, EMERgency  
backup, OFF, COOLing, or AUTOmatic  
changeover [user selectable feature]).  
13 Used to start program operation after program-  
ming. Also used to return thermostat to program  
operation after being in HOLD mode.  
Selects fan operation (see #6, previous page).  
Thisbuttonisalsousedtoprogramthefantorun  
continuously during a program period.  
Used to manually override programming to hold  
14  
15  
at a selected temperature (when HOLD is dis-  
played).  
9
Runs display forward or backward through time,  
day, or anticipation settings during program-  
ming.  
Usedtoadvancethermostatprogramtothenext  
program period (for example, from the MOR  
program to the DAY program).  
TIME  
FWD  
TIME  
10  
11  
Used with  
and  
to set current time  
BACK  
(Blue arrow) Lowers temperature setting (40°F  
or 4°C minimum).  
16  
17  
and day of the week.  
Used during programming to set the day of the  
(Red arrow) Raises temperature setting (99°F  
or 37°C maximum)  
SET  
week. Also used with  
tion setting mode.  
to enter anticipa-  
CLOCK  
26  
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setpoint temperature — there is a 5 to 10  
minute startup delay on the first emergency  
cycle). AUX light indicates that the auxiliary  
system is operating.  
18 EMER light indicates that the system is in the  
emergency mode (the heat pump compressor  
is off and the auxiliary system is maintaining  
16 17  
18  
EMER.  
5 DAY  
FAN  
AUX.  
TIME  
FWD  
SET  
VIEW  
HOLD  
SYSTEM  
HEAT-OFF-COOL-AUTO  
7
8
CLOCK  
PRGM  
TEMP  
TIME  
SET  
DAY  
RUN  
ADV  
FAN  
ON - AUTO  
BACK  
PRGM  
PRGM  
9
10 11 12 13 14 15  
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system at about 5:00 AM, so that the pro-  
grammed70°Ftemperatureisreachedbyabout  
6:00 AM.  
OPERATING FEATURES  
Now that you are familiar with the thermostat display  
and buttons, read the following information to learn  
about the many features of the thermostat.  
AUTOMATIC CHANGEOVER — You can set  
the thermostat to automatically switch the sys-  
tem from heating to cooling as needed. First,  
you must move option switch #4 (located on the  
backofthethermostatbody)totheON position,  
if it has not already been done. To do this, press  
COMPUTED ENERGY MANAGEMENT RE-  
COVERY (EMR) - The thermostat’s microcom-  
puter automatically calculates the time it will  
take to change the temperature to the next  
program setting. Then the thermostat will acti-  
vate the heating or cooling system to change  
the temperature so that the desired tempera-  
ture is reached at the beginning of the next  
program period. As an example of this feature,  
assume that you have programmed your ther-  
mostat to provide an overnight heating tem-  
perature of 62°F, and that during the next pro-  
gram period, beginning at 6:00 AM, you have  
programmed a temperature of 70°F. The ther-  
mostat will automatically activate the heating  
SYSTEM  
HEAT-OFF-COOL-AUTO  
untilthermostatisOFF.Then,remove  
the thermostat body from the wall. Check the  
position of switch #4 (the last switch on the  
right). If it is ON (up), simply put the thermostat  
back on the wall and restore 24 VAC power. If  
the switch is OFF (down), use a pencil or small  
screwdriver to move the switch to the ON posi-  
tion(seefigureatright). Leavethebatteryoutof  
thethermostatforatleasttwominutes,toallow  
the thermostat to reset itself. DO NOT MOVE  
ANY OTHER OPTION SWITCH, as it may  
28  
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affect thermostat operation. Replace the bat-  
tery, re-program the thermostat if necessary,  
put the thermostat back on the wall, and use  
AUTOMATIC CHANGEOVER (ON)  
ON  
SYSTEM  
HEAT-OFF-COOL-AUTO  
to set thermostat for desired opera-  
1
2
3
4
tion. To set the thermostat for automatic  
Switch #1 set at installation (DO NOT CHANGE)  
Switch #2 set at installation (DO NOT CHANGE)  
Switch #3 set at installation (DO NOT CHANGE)  
Switch #4 ON  
SYSTEM  
HEAT-OFF-COOL-AUTO  
changeoverafterprogramming,press  
to set the thermostat to AUTO (the setpoint  
display is blank in the AUTO mode). The sys-  
temwillnowautomaticallyswitchbetweenheat-  
ing and cooling depending on the actual room  
temperature.  
NOTE  
In the AUTO mode, the thermostat will not allow the  
temperature separation between the highest heat  
settingandthelowestcoolsettingtobelessthat1°F.  
For example, if the highest heat setting is 76°F, the  
lowest cool setting cannot be below 77°F (see  
diagram at left).  
79  
COOLING TEMPERATURES  
DEAD BAND 1°F  
78  
77  
76  
75  
74  
73  
HEATING TEMPERATURES  
29  
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If the automatic changeover feature is enabled,  
AUTOMATIC CHANGEOVER (OFF)  
SYSTEM  
and you wish to disable it, press  
until  
HEAT-OFF-COOL-AUTO  
ON  
thermostat is OFF. Then, remove the thermo-  
stat body from the wall. Move the switch to the  
ON position (see figure at right). Leave the  
battery out of the thermostat for at least two  
minutes, to allow the thermostat to reset itself.  
DO NOT MOVE ANY OTHER OPTION  
SWITCH, as it may affect thermostat operation.  
Replace the battery, re-program the thermostat  
if necessary, put the thermostat back on the  
1
2
3
4
Switch #1 set at installation (DO NOT CHANGE)  
Switch #2 set at installation (DO NOT CHANGE)  
Switch #3 set at installation (DO NOT CHANGE)  
Switch #4 OFF  
TWO HOUR TEMPERATURE OVERRIDE —  
Press  
or  
until the display shows the  
SYSTEM  
wall, and use  
desired.  
to set the thermostat as  
HEAT-OFF-COOL-AUTO  
temperatureyouwant.Thethermostatwillover-  
ride current programming and keep the room  
temperatureattheselectedtemperaturefortwo  
hours. After two hours, the thermostat will auto-  
matically revert to the program.  
HOLDTEMPERATUREThethermostatcan  
hold any temperature within its range for an  
indefinite period, without reverting to the pro-  
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cycles), you may want to adjust the anticipation  
setting.  
HOLD  
TEMP  
gram. Press  
. HOLD will be displayed.  
Then choose the desired hold temperature by  
pressing or . The thermostat will  
CAUTION  
!
hold the room temperature at the selected set-  
An anticipation setting of less than 10 may  
cause decreased compressor life.  
HOLD  
ting until you press  
to start program op-  
TEMP  
SET  
eration again. This feature is ideal for energy  
conservation when the building is unoccupied  
for an extended period of time.  
To adjust HEAT anticipation, press  
and  
CLOCK  
SET  
at the same time. The display will show  
DAY  
HEAT 18. You may select any anticipation  
setting from 4 to 40 (note that for add-on heat  
pump systems, a minimum anticipation of  
10 is recommended). When you adjust antici-  
pation,increaseordecreasethedisplayednum-  
ber by only one or two digits, then let the system  
run for a while to see if the adjustment is  
sufficient. If the heat cycles are too short, press  
TIME  
°F/°C CONVERTIBILITY — Press  
and  
FWD  
TIME  
at the same time until the temperature  
BACK  
display is in °C (Celsius). To display °F, repeat  
the process.  
ADJUSTABLE HEATING AND COOLING  
CYCLETIMES(ANTICIPATION)Iftheheat-  
ing/cooling system is turning on and off too  
often (short cycles) or not often enough (long  
TIME  
to increase the cycle time. If the heat  
FWD  
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continuously (non-flashing), 24 VAC power is  
not being supplied and the thermostat is work-  
ing on battery power only.  
TIME  
cycles are too long, press  
to decrease  
BACK  
the cycle time. To set COOL anticipation, press  
SET  
SET  
DAY  
COMPRESSOR SHORT CYCLE PROTEC-  
TION — To protect your compressor from poten-  
tial damage due to rapid cycling, this thermostat  
has a built-in delay of 5 minutes between cooling  
cycles. The following may cause a time delay in  
COOL or HEAT:  
and  
at the same time again. The  
CLOCK  
display will show COOL 14 (factory  
preprogrammed cooling anticipation). Use  
TIME  
FWD  
TIME  
and  
to adjust anticipation. To set  
BACK  
AUXILIARY heat anticipation (not applicable to  
a) Return of power after a momentary power  
outage.  
SET  
SET  
DAY  
multi-stage use), press  
and  
at the  
CLOCK  
same time again. The display will show AUX 8  
(factory preprogrammed auxiliary anticipation).  
SYSTEM  
HEAT-OFF-COOL-AUTO  
b) Pressing  
modes.  
to change operating  
TIME  
FWD  
TIME  
Use  
and  
to adjust anticipation.  
BACK  
c) Pressing  
or  
to create a call for  
RUN  
PRGM  
Press  
to return to your program.  
COOL or HEAT too soon after a previous  
call.  
LOW BATTERY INDICATOR — The word BAT  
will flash on the display if the battery is low and  
should be replaced. When BAT is displayed  
During lockout in the COOL mode, the blower  
will operate, but compressor operation will be  
delayed.  
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Auxiliary heat is functional during the compres-  
sor lockout and can be used as needed to  
maintain room temperature.  
SYSTEM INDICATOR LIGHTS — The lights  
ontheupperrightpartofthethermostatindicate  
system operation (see PARTS OF THE THER-  
MOSTAT for specific descriptions of what each  
light indicates).  
COMPRESSOR LONG TERM CYCLE PRO-  
TECTION — If your system begins to operate  
too soon after an extended power outage, the  
compressormaybedamagedduetocrankcase  
oil temperature change. This thermostat has a  
built-in time delay of one hour less than the  
power loss (up to 12 hours). When power is  
restored to the system, heaters in the system  
will begin to heat the crankcase oils. The  
thermostat’s time delay will lock out the com-  
pressor to prevent its operation until the com-  
pressor oil is sufficiently warmed. During the  
lockout time period, the auxiliary heating sys-  
tem will operate to maintain setpoint tempera-  
ture.  
PROGRAMMABLE BLOWER CONTROL —  
You may program the fan blower to run continu-  
ously during any given program period, regard-  
less of the cycling of the heating or cooling  
system.Duringprogramming,afterenteringthe  
time and temperature for the time period, press  
FAN  
– AUTO  
until FAN  
is displayed. To override  
ON  
FAN  
– AUTO  
constant fan, press  
displayed.  
until FAN  
is  
ON  
For example, if a power outage of three hours  
occurs, the compressor will be locked out for  
two hours.  
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PROGRAMMING YOUR THERMOSTAT  
Now you are ready to program your thermostat. This two-day program is set to run Saturday and Sunday.  
section will help you plan and program your thermo- However, you may choose any five consecutive  
stat to meet your needs.  
days to be your weekday program days (such as  
Sunday through Thursday; in this case, your week-  
end program would run on Friday and Saturday).  
For maximum comfort and efficiency, keep the fol-  
lowing guidelines in mind when planning your pro-  
gram.  
First, you should answer the following questions to  
help you decide what your needs are. If you are  
using the thermostat for a commercial application (a  
store, office building, etc.), answer questions 1  
through 4. If you are using the thermostat in your  
home, answer questions 5 through 8. Keep in mind  
that you should plan for both weekday and weekend  
programs.  
• When heating (cooling) your building, program  
the temperatures to be cooler (warmer) when  
the building is vacant or during periods of low  
activity.  
• During early morning hours, the need for cool-  
ing is usually minimal.  
PLANNING FOR YOUR NEEDS  
FOR COMMERCIAL APPLICATIONS:  
1a.What time does the first person arrive at the  
building in the morning?  
This thermostat will store separate heating and  
cooling programs for five-day (weekday) and two-  
day (weekend) operation. Usually, the five-day pro-  
gram is set to run Monday through Friday, and the  
34  
b. What temperature should the building be at this IN YOUR HOME:  
time? (heating? cooling?) These will be your  
MOR (morning) temperature settings.  
5a.What time does the first person get up in the  
morning?  
2a.What time do the building occupants reach a  
maximum activity level (using lights, equipment,  
meeting rooms, etc.)?  
b. What temperature should the house be at this  
time? These will be your MOR (morning) tem-  
perature settings.  
b. What temperature should the building be at this  
time? These will be your DAY temperature set-  
tings.  
6a.What time does the last person leave the house  
in the morning?  
b. What temperature should the house be at this  
time? These will be your DAY temperature set-  
tings.  
3a.What time do the building occupants reach a  
minimumactivitylevel(limitedpersonnelinbuild-  
ing)? These will be your EVE (evening) tempera-  
ture settings.  
7a.What time does the first person arrive home in  
the evening?  
b. What temperature should the building be at this  
time?  
b. What temperature should the house be at this  
time? These will be your EVE (evening) tem-  
perature settings.  
4a.What time does the building become vacant?  
b. What temperature should the building be at this  
time? These will be your NHT (night) tempera-  
ture settings.  
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8a.What time does the last person go to bed at  
night?  
NOTE  
To operate properly in the AUTO mode, there must  
be aminimum 1°F separation between the highest  
heat temperature and the lowest cool temperature  
(see diagram below).  
b. What temperature should the house be at this  
time? These will be your NHT (night) tempera-  
ture settings.  
Now look at the factory preprogrammed times and  
temperatures shown below. If this program will suit  
79  
COOLING TEMPERATURES  
DEAD BAND 1°F  
78  
77  
76  
75  
74  
73  
RUN  
yourneeds, simplypress  
factory preset program.  
tobeginrunningthe  
PRGM  
HEATING TEMPERATURES  
If you want to change the preprogrammed times and  
temperatures, do the following.  
Determine the time periods and heating and cooling  
temperatures for your weekday program. You must  
program 4 periods for each day (MOR, DAY, EVE,  
and NHT). However, you may use the same heating  
Cooling Program for ALL Days of the Week:  
Heating Program for ALL days of the Week:  
TEMP  
78  
82  
78  
78  
PERIOD  
MOR  
DAY  
EVE  
NHT  
TIME  
TEMP  
70  
70  
70  
64  
PERIOD  
MOR  
DAY  
EVE  
NHT  
TIME  
5:00 AM  
9:00 AM  
4:00 PM  
10:00 PM  
5:00 AM  
9:00 AM  
4:00 PM  
10:00 PM  
36  
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and cooling temperatures for consecutive time peri-  
ods. You can choose start times, heating tempera-  
tures, and cooling temperatures independently for  
bothweekdayandweekendprograms(forexample,  
you may select 5:00 AM and 70° as the weekday  
MORheatingstarttimeandtemperature,andchoose  
7:00AMand76° astheweekdayMORcoolingstart  
time and temperature). Use the table on the next  
page to plan your program time periods, and the  
temperaturesyouwantduringeachperiod.Youmay  
also want to look at the sample program table to get  
an idea of how the thermostat can be programmed.  
ENTERING YOUR PROGRAM  
Follow these steps to enter the heating and cooling  
programs you have selected.  
NOTE  
We recommend that you remove the thermostat  
from the wall for programming (especially for enter-  
ing cooling programming). A fresh 9 volt Energizer®  
alkaline battery must be installed to perform off-wall  
SYSTEM  
HEAT-OFF-COOL-AUTO  
programming. BE SURE TO PRESS  
TO  
TURNTHERMOSTATOFFBEFOREREATTACH-  
ING TO SUBBASE!  
You cannot program the thermostat with the SYS-  
TEM SWITCH in the AUTO position.  
(Instructions continue on page 40).  
37  
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Heating/Cooling Schedule Plan  
WEEKEND (2 DAY)  
WEEKDAY (5 DAY)  
Start  
Time  
Start  
Time  
Temperature  
Temperature  
MOR HEAT  
DAY HEAT  
EVE HEAT  
NHT HEAT  
MOR COOL  
DAY COOL  
EVE COOL  
NHT COOL  
38  
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SAMPLE  
Heating/Cooling Schedule Plan  
WEEKEND (2 DAY)  
WEEKDAY (5 DAY)  
Start  
Time  
Start  
Time  
Temperature  
Temperature  
MOR HEAT  
DAY HEAT  
EVE HEAT  
NHT HEAT  
MOR COOL  
DAY COOL  
EVE COOL  
NHT COOL  
5:30 AM  
68°  
7:00 AM  
11:00 AM  
6:00 PM  
11:30 PM  
7:00 AM  
12:30 PM  
6:00 PM  
11:30 PM  
68°  
8:00 AM  
5:00 PM  
10:30 PM  
6:30 AM  
2:00 PM  
5:00 PM  
10:30 PM  
65°  
70°  
65°  
76°  
78°  
72°  
78°  
70°  
70°  
65°  
76°  
74°  
72°  
78°  
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Set Current Time and Day  
SET  
DAY  
5. Press  
once. The display will show the day  
SET  
of the week as an abbreviation (MO for Monday,  
TU for Tuesday, etc.).  
1. Press  
once. The display will show min-  
CLOCK  
utes only.  
TIME  
FWD  
TIME  
6. Press and hold either  
or  
until you  
BACK  
EXAMPLE:  
reach the current day of the week.  
TIME  
FWD  
TIME  
2. Press and hold either  
or  
until you  
BACK  
RUN  
7. Press  
once. The display will show the  
PRGM  
reach the correct minutes.  
correct time and room temperature alternately.  
SET  
3. Press  
once. The display window will  
Enter Heating Program  
CLOCK  
show the hour only.  
EXAMPLE:  
During programming, if you don’t press any buttons  
for 5 minutes, the thermostat will enter the HOLD  
mode and will maintain a constant temperature. The  
display will revert to the alternating time/tempera-  
ture display. To resume programming after this  
TIME  
FWD  
TIME  
4. Press and hold either  
or  
until you  
BACK  
VIEW  
reach the correct hour and AM/PM designation  
(AM begins at midnight; PM begins at noon).  
happens, press  
until you are at the point  
PRGM  
where you stopped programming. Then you may  
continue to enter your programs normally. If you  
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want to stop programming at any time, simply press 3. To change the displayed start time to your se-  
lected start time for weekday MOR heat pro-  
RUN  
to resume program operation.  
PRGM  
TIME  
FWD  
TIME  
gram, press  
or  
until your selected  
BACK  
SYSTEM  
HEAT-OFF-COOL-AUTO  
1. Press  
until HEAT is displayed.  
time appears. The time will change in 15 minute  
increments.  
VIEW  
2. Press  
once. 5 DAY (indicating weekday  
PRGM  
4. Press  
or  
until you reach your se-  
program), and MOR, representing the morning  
heating period, will appear in the display. Also  
displayed are the currently programmed start  
time for the MOR period and the currently pro-  
grammed temperature.  
lected weekday MOR heating temperature.  
5. If you want the fan to run continuously during this  
FAN  
– AUTO  
period, press  
until FAN  
is displayed.  
ON  
VIEW  
6. Press  
. The currently programmed start  
PRGM  
EXAMPLE:  
5 DAY  
time and heating temperature for weekday DAY  
will be displayed.  
This display window shows that for the weekday  
MOR period, the start time is 5:00 AM, and 64° is  
the programmed temperature (this example re-  
flects factory preprogramming).  
7. Repeat steps 3 through 5 to select the start time  
and heating temperature for the weekday DAY  
program.  
8. Repeat steps 3 through 7 for the weekday EVE  
and NHT heating programs.  
41  
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9. After entering your weekday heating program,  
repeat steps 1 through 8 for your weekend pro-  
gramming (keep in mind that for weekend pro-  
gramming, thedisplayshouldbechangedfrom5  
DAY to 2 DAY).  
Enter Cooling Program  
CAUTION  
!
If outside temperature is below 50°F, we  
recommendthatyouremovethethermostat  
from the wall before proceeding with the  
following steps to program cooling tem-  
peratures. Personal injury or property dam-  
age may occur due to air conditioner com-  
pressor slugging. A fresh 9 volt Energizer®  
alkalinebatterymustbeinstalledtoperform  
off-wall programming. Programming away  
fromthewallshouldpreventaccidentalcom-  
pressor operation. BE SURE TO USE  
10.Whenyouhavecompletedenteringyourheating  
RUN  
program, press  
.
PRGM  
SYSTEM  
HEAT-OFF-COOL-AUTO  
TO TURN THERMOSTAT OFF BE-  
FORE REATTACHING TO SUBBASE!  
42  
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SYSTEM  
HEAT-OFF-COOL-AUTO  
SYSTEM  
HEAT-OFF-COOL-AUTO  
1. Press  
until COOL is displayed.  
4. Press  
until COOL is displayed.  
2. Follow the procedure for entering your heating 5. Repeat step 2 to check cooling temperatures.  
program, using your selected cooling times and  
RUN  
6. Press  
to begin program operation.  
temperatures.  
PRGM  
CHECK YOUR PROGRAMMING  
YOUR THERMOSTAT IS NOW COMPLETELY  
PROGRAMMED AND READY TO AUTOMATI-  
CALLYPROVIDEMAXIMUMCOMFORTANDEF-  
FICIENCY!  
Follow these steps to check your thermostat pro-  
gramming one final time before beginning thermo-  
stat operation.  
SYSTEM  
HEAT-OFF-COOL-AUTO  
Press  
until OFF is displayed. Reattach  
SYSTEM  
HEAT-OFF-COOL-AUTO  
1. Press  
until HEAT is displayed.  
SYSTEM  
HEAT-OFF-COOL-AUTO  
thermostat to subbase. Then press  
to  
VIEW  
2. Press and hold  
to view the heating period  
PRGM  
select the operation mode you want (HEAT, COOL,  
times and temperatures in sequence for week-  
day, then weekend MOR, DAY, EVE, and NHT  
program periods.  
FAN  
– AUTO  
AUTO). Press  
until FAN  
is displayed  
ON  
(automatic cycling).  
RUN  
3. Press  
.
PRGM  
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QUESTIONS AND ANSWERS  
1. How can I permanently change a part of my 3. How can I finish my programming if the dis-  
program?  
play has already changed to time/tempera-  
ture?  
VIEW  
Press  
until you reach the time/tempera-  
PRGM  
During programming, if no buttons are pressed  
for five minutes, the thermostat will enter the  
HOLD mode and maintain a constant tempera-  
ture. The display will change to the time/tem-  
perature mode. To resume programming, press  
ture schedule you want. Then press  
or  
TIME  
FWD  
TIME  
and  
and  
to change the pro-  
BACK  
gram. See PROGRAMMING YOUR THERMO-  
STAT.  
VIEW  
until you return to the point where you  
PRGM  
2. How can I have no change in temperature  
from one time period to another?  
stopped programming. Then you may continue  
to program the thermostat normally. If you want  
Simply select the same temperature for each  
consecutive time period. For example, you may  
select the same weekday EVE cooling tempera-  
ture as you did for weekday DAY, which means  
the temperature will not change when the EVE  
period begins. See PROGRAMMING YOUR  
THERMOSTAT.  
RUN  
tostopprogrammingatthispoint, press  
to  
PRGM  
start the normal program function. See PRO-  
GRAMMING YOUR THERMOSTAT.  
44  
href="
4. What happens if the electricity goes off or is 6. What can cause the thermostat display to  
manually shut off?  
freeze or go blank?  
If you have not installed a 9 volt alkaline battery,  
the display will go blank and the program will be  
lost in approximately one minute. When electric-  
ity is restored, the thermostat will maintain a  
heating temperature of 64°F and a cooling tem-  
perature of 82°F until you reenter your program.  
Setpoint temperature will not be displayed.  
If a fresh 9 volt Energizer® alkaline battery is  
installed, the program will be maintained for  
about one week with no 24 VAC power present  
to the thermostat. See OPERATING YOUR  
THERMOSTAT.  
A completely blank display may indicate that  
power has been lost to the thermostat and the  
backup battery is also dead. However, if there is  
power to the thermostat and the display is blank  
or frozen, static discharge is probably the cause.  
During periods of low humidity (especially during  
cold weather), you may feel or see a spark  
discharge when you touch the thermostat. This  
may cause the program to be lost or the thermo-  
stattodisplayincorrectly.Tocorrectthis,remove  
the thermostat from the wall and disconnect the  
battery. Wait about one minute, then re-connect  
the battery. The thermostat will revert to the  
factory preset program until you re-program the  
thermostat. If you don’t want to re-program the  
5. Why can’t I program the thermostat in the  
AUTO mode?  
The thermostat can only be programmed in the  
HEATandCOOLmodes.SeePROGRAMMING  
YOUR THERMOSTAT.  
SYSTEM  
HEAT-OFF-COOL-AUTO  
thermostat immediately, press  
until  
OFF is displayed and replace the thermostat on  
45  
href="
the heating temperature higher. To set a lower  
cooling temperature, you must select a lower  
heating temperature. See PROGRAMMING  
YOUR THERMOSTAT.  
SYSTEM  
HEAT-OFF-COOL-AUTO  
the wall. Then press  
for desired sys-  
to begin the  
RUN  
PRGM  
tem operation, and press  
factory preset program. Or you may re-program  
the thermostat, then replace it on the wall.  
8. The display is flashing BAT. What does this  
mean?  
To prevent further static discharge problems,  
touch another object to release static build-up  
before touching the thermostat. See OPERAT-  
ING YOUR THERMOSTAT.  
The 9 volt battery installed in the thermostat is  
low and should be replaced with a fresh 9 volt  
Energizer® alkaline battery. See OPERATING  
YOUR THERMOSTAT.  
7. Why won’t the setpoint temperature go to the  
temperature I want?  
9. The display shows a continuous (non-flash-  
ing) BAT. What does this mean?  
In the AUTO mode, the highest heating setpoint  
temperature you select must be at least 1°F  
lower than the lowest cooling setpoint tempera-  
ture you select (for example, if 70°F is your  
lowestselectedcoolingtemperature, youcannot  
select a heating temperature any higher than  
69°F). If such a conflict exists, you must set the  
lowest cooling temperature higher in order to set  
Thethermostatisnotbeingsuppliedwith24VAC  
power. The thermostat is operating on battery  
power alone. See OPERATING YOUR THER-  
MOSTAT.  
46  
href="
10.Why won’t the system turn on, even though 11.Why doesn’t the temperature change at the  
the thermostat display is functioning nor-  
mally?  
time I programmed?  
There may be a number of causes for this situa-  
tion. The following are primary reasons.  
Either the compressor lockout feature is in op-  
eration or the thermostat is not currently calling  
for heat or cool. Wait about 5 minutes for the  
compressorlockouttoexpire. Ifthesystemisstill  
not running, read the cautionary statement be-  
The EMR function is operating. The EMR  
function will automatically bring on the sys-  
tem automatically to bring the temperature  
to the selected level by the beginning of the  
next program period. See OPERATING  
YOUR THERMOSTAT.  
low.Then,ifconditionspermit,usethe  
or  
buttons to move the temperature above or  
below the setpoint temperature. See OPERAT-  
ING YOUR THERMOSTAT.  
You have programmed the incorrect day or  
time.Checkyourprogramming(besurethat  
the times you programmed are correct AM  
or PM times). See PROGRAMMING YOUR  
THERMOSTAT.  
CAUTION  
!
If the outside temperature is below 50°F, DO  
NOTuse or tomovethetempera-  
ture above or below the setpoint tempera-  
ture. Property damage may result due to  
compressor slugging.  
The thermostat is in the HOLD mode. Press  
RUN  
to start program operation. See OP-  
PRGM  
ERATING YOUR THERMOSTAT.  
47  
href="
The compressor lockout feature is operat- 14.Betweenheatingandcoolingseasons, Iwant  
ing;waitabout5minutesforsystemtobegin  
running. See OPERATING YOUR THER-  
MOSTAT.  
to turn my system off. Can I do this without  
affecting my thermostat programming?  
Any time you wish to turn your system off, simply  
12.Why does the blower fan keep running after  
the system has turned off?  
SYSTEM  
HEAT-OFF-COOL-AUTO  
press  
until OFF is displayed. This will  
not affect your thermostat’s programming in any  
You have programmed the fan to run con-  
tinuouslyduringthisperiod.SeePROGRAM-  
MING YOUR THERMOSTAT.  
SYSTEM  
HEAT-OFF-COOL-AUTO  
way. To turn the system back on, press  
untilHEAT,COOL, etc. isdisplayed. Thesystem  
will automatically begin operating according to  
the current thermostat program, unless the ther-  
mostat is in the HOLD mode. See OPERATING  
YOUR THERMOSTAT.  
The blower delay feature is operating. This  
energy saving feature continues to blow  
conditioned air through the ducts after the  
system has turned off, rather than letting the  
air dissipate.  
13.Why is the system turning on and off so  
frequently (seldom)?  
The anticipation setting is too low (high). To  
change anticipation settings, see OPERATING  
YOUR THERMOSTAT.  
48  
href="
15.Iliveinanareawheredaylightsavingstimeis  
observed. How do I change the thermostat  
clock twice a year without affecting thermo-  
stat programming?  
withinoneminute,youmaynotloseyourthermo-  
stat programming. After installing a new battery,  
follow the procedures in CHECK YOUR PRO-  
GRAMMING to determine whether your pro-  
gramming was maintained. If the thermostat  
To change your clock, follow the instructions for  
setting current time and day. See ENTERING  
YOUR PROGRAM. Thermostat programming is  
not affected when you change the clock.  
SYSTEM  
HEAT-OFF-COOL-AUTO  
maintains programming, press  
until  
OFF is displayed, put the thermostat back on the  
SYSTEM  
HEAT-OFF-COOL-AUTO  
wall,press  
toselecttheoperatingmode  
17.Do I have to re-program my thermostat after  
I change the battery?  
RUN  
you want, then press  
to start program  
PRGM  
When the thermostat is on the wall and the  
system has power, the thermostat is being pow-  
ered by a 24v AC source. If power is lost, or if the  
thermostat is removed from the wall, the pro-  
gram will be retained for approximately one  
minute if there is no battery installed or if the  
installed battery is dead. If you are changing the  
battery after seeing a flashing BAT on the dis-  
play, the installed battery may be dead. If you  
remove the old battery and install a fresh one  
operation. If the program is lost, re-program the  
thermostat.SeePROGRAMMINGYOURTHER-  
MOSTAT.  
49  
href="
NOTES  
50  
href="
NOTES  
51  
If you need further information about this product, please write to  
White-Rodgers Division, Emerson Electric Co.  
9797 Reavis Road  
St. Louis, MO 63123-5398  
Attn: Technical Service Department  
Part No. 37-5414A  
9513  

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