White Rodgers Thermostat 1F83 71 User Manual

1F83-71  
Non-Programmable Electronic  
Digital Automatic Changeover Multi-stage Thermostat  
INSTALLATION AND  
WHITE-RODGERS  
OPERATION INSTRUCTIONS  
Operator: Save these instructions for future use!  
FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY  
BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE  
PERSONAL INJURY AND/OR PROPERTY DAMAGE.  
DESCRIPTION  
Your new White-Rodgers Digital Multi-stage Thermostat uses  
thetechnologyofasolid-statemicrocomputertoprovideprecise  
time/temperature control.  
• LCD continuously displays setpoint and room temperature  
°F/°C convertibility  
• Temperature range 45° to 90°F  
• Two-stage heat/two-stage cool  
• Armchair programming capability  
Features:  
• Simultaneous heat and cool setpoint storage  
• Optional C terminal (dual power option)  
• Optional B and O terminals  
• Preprogrammed temperature control  
PRECAUTIONS  
CAUTION  
Thisthermostatisintendedforusewitha24-voltsystem;donot  
use this thermostat with a millivolt or line voltage system. If in  
doubt about whether your wiring is millivolt, line, or low voltage,  
have it inspected by a qualified heating and air conditioning  
contractor or electrician.  
!
To prevent electrical shock and/or equipment damage  
disconnect electric power to system at main fuse or  
circuit breaker box until installation is complete.  
Do not exceed the specification ratings.  
WARNING  
!
Allwiringmustconformtolocalandnationalelectricalcodesand  
ordinances.  
Do not use on circuits exceeding specified voltage.  
Higher voltage will damage control and could cause  
shock or fire hazard.  
This control is a precision instrument, and should be handled  
carefully. Roughhandlingordistortingcomponentscouldcause  
the control to malfunction.  
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.  
SPECIFICATIONS  
ELECTRICAL DATA  
APPLICATIONS  
Electrical Rating:  
For use with:  
20 to 30 VAC 50/60 Hz. or D.C.  
0.05 to 1.5 Amps (Load per terminal)  
1.5 Amps Maximum Total Load (All terminals combined)  
• Heat/cool systems with up to two stages heat, two  
stages cool  
DO NOT USE WITH:  
THERMAL DATA  
• Millivolt systems  
Setpoint Temperature Range:  
45°F to 90°F (7°C to 32°C)  
• Systems exceeding 30 VAC and 2.5 amps  
• 3-wire zoned hydronic heating systems  
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  
WHITE-RODGERS DIVISION  
EMERSON ELECTRIC CO.  
9797 REAVIS ROAD  
PART NO. 37-6126B  
Printed in U.S.A.  
Replaces 37-6126A  
0004  
ST. LOUIS, MISSOURI 63123-5398  
 
NOTE  
NOTE  
The following wiring diagrams show typical terminal identifica-  
tion and wiring. For proper installation, refer to the original  
manufacturer’s instructions.  
Relay contacts shown are thermostatically operated.  
* The 24 Volt neutral connection  
to terminal C on the thermostat  
is not required if you replace  
Thermostat  
the batteries once a year with  
fresh “AA” Energizer® alkaline  
batteries.  
Control  
Circuit  
THERMOSTAT  
SYSTEM  
W2  
C*  
R
B
O
Y
Y2  
G
W
Heat  
Relay  
Compressor  
Contactor  
Stage 2  
Energized  
in COOL  
Stage 1  
Hot  
24 VAC  
120 VAC  
Compressor  
Contactor  
Stage 1  
Heat  
Relay  
Energized  
in HEAT  
Neutral  
TRANSFORMER  
Fan  
Relay  
Stage 2  
Figure 3. Typical wiring diagram for single transformer systems  
* The 24 Volt neutral connection  
to terminal C on the thermostat  
is not required if you replace  
the batteries once a year with  
fresh “AA” Energizer® alkaline  
batteries.  
Thermostat  
Control  
Circuit  
THERMOSTAT  
SYSTEM  
CUT AND  
TAPE OFF!  
B
W2  
C*  
R
Y
Y2  
G
O
W
Hot  
Heat  
Relay  
Compressor  
Contactor  
Stage 2  
Energized  
in COOL  
120 VAC  
24 VAC  
Stage 1  
Hot  
Neutral  
24 VAC  
120 VAC  
TRANSFORMER  
Compressor  
Contactor  
Stage 1  
Heat  
Relay  
Neutral  
TRANSFORMER  
Energized  
in HEAT  
Fan  
Relay  
Stage 2  
TWO COMMONS MUST  
BE JUMPERED TOGETHER!  
Figure 4. Typical wiring diagram for two-transformer systems with NO safety circuits  
* The 24 Volt neutral connection  
Thermostat  
Control  
to terminal C on the thermostat  
is not required if you replace  
the batteries once a year with  
fresh “AA” Energizer® alkaline  
batteries.  
Circuit  
THERMOSTAT  
SYSTEM  
B
W2  
C*  
R
Y
Y2  
G
O
W
Heat  
Relay  
Compressor  
Contactor  
Stage 2  
Energized  
in COOL  
Limit or  
Safety  
Switches  
Stage 1  
Limit or  
Safety  
Switches  
Hot  
24 VAC  
120 VAC  
Neutral  
Compressor  
Contactor  
Stage 1  
Heat  
Relay  
Energized  
in HEAT  
Fan  
24 VAC  
Accessory  
Relay N.O.  
Contact  
HEATING  
TRANSFORMER  
Relay  
Stage 2  
Common  
Limit or  
Safety  
Switches  
Limit or  
Safety  
Switches  
Hot  
TWO COMMONS MUST  
BE JUMPERED TOGETHER!  
24 VAC  
120 VAC  
Common  
Neutral  
COOLING  
TRANSFORMER  
Figure 5. Typical wiring diagram for two-transformer systems with safety circuits in BOTH systems  
3
 
Heating System  
3. Press  
toadjusttemperaturesettingaboveroomtempera-  
1. Press SYSTEM button to turn thermostat to HEAT.  
ture. The cooling system should stop operating.  
2. Press  
toadjustthermostatsettingto90° andholdforfive  
NOTE  
seconds. After you release the button, both stages of the  
heating system should begin to operate within five seconds.  
During normal operation, the second stage of heat or cool may  
take 15 to 30 minutes to turn on. The delay varies depending on  
theperformanceofthefirststage.Typicallythesecondstagewill  
comeonsoonerinmoresevereweather,whileinmilderweather  
it will take longer. There is no adjustment to this feature, as it is  
designed to maximize both comfort and efficiency.  
3. Press  
toadjusttemperaturesettingbelowroomtempera-  
ture. The auxiliary heating system will stop immediately and  
the first stage will stop within three to four minutes.  
Cooling System  
CAUTION  
!
LOCKOUT BYPASS OPTION  
Topreventcompressorand/orpropertydamage, ifthe  
outdoor temperature is below 50°F, DO NOT operate  
the cooling system.  
FOR QUALIFIED SERVICE TECHNICIANS’ USE  
ONLY.OPERATORSSHOULDNOTUSETHISFEA-  
TURE DUE TO POSSIBILITY OF EQUIPMENT OR  
PROPERTY DAMAGE, OR PERSONAL INJURY.  
1. Press SYSTEM button to turn thermostat to COOL.  
2. Press  
toadjustthermostatsettingto45° andholdforfive  
seconds. After you release the button, the blower should  
come on immediately on high speed, followed by cold air  
circulation. Both stages of the cooling system should begin  
to operate (if you have a two-stage cooling system).  
COMPRESSOR SHORT TERM  
CYCLE PROTECTION  
During normal operation, this thermostat has a built-in  
short term (5-minute) time delay. During this 5-minute  
period, the thermostat will lock out the compressor to  
allow head pressure to stabilize. If you want to over-  
ride this feature while testing thermostat operation,  
Ifthefanisrunningbutthecompressorisnotrunningandthe  
word COOL is flashing, the compressor lockout feature is  
operating (see Lockout Bypass Option to temporarily  
override the compressor lockout feature during testing).  
simply press  
and  
buttons at the same time.  
DO NOT USE THE LOCKOUT BYPASS OPTION  
UNLESSTHECOMPRESSOROILHEATERSHAVE  
BEEN OPERATIONAL FOR 6 HOURS AND THE  
SYSTEM HAS NOT BEEN OPERATIONAL FOR AT  
LEAST 5 MINUTES.  
4
 
OPERATION  
Before you begin using 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, gently pull it straight out from the base. To replace the  
cover, line up the cover with the base and press gently until the  
cover snaps onto the base.  
1
2
THE THERMOSTAT BASE  
SYSTEM  
FAN ON  
AUTO  
Other than  
and  
, the following buttons and switches are  
COOL-OFF-HEAT-AUTO  
located behind the door on the bottom of the thermostat cover  
(see fig. 6). Pull the door down to open it.  
The Thermostat Buttons and Switches  
3
4
(Red arrow) Raises temperature setting.  
(Blue arrow) Lowers temperature setting.  
SYSTEM button (COOL, OFF, HEAT, AUTO).  
FAN switch (ON, AUTO).  
1
2
3
4
5
HT 1+2  
OFF  
6
8
CL 1+2  
LOCK  
BATTERY  
The Display  
5
7
9
HTisdisplayedwhentheSYSTEMbuttonhasbeenpressed  
5
Figure 6. Thermostat display, buttons, and switches  
to put the thermostat in the HEAT mode. CL is displayed  
when the SYSTEM button has been pressed to put the  
thermostat in the COOL mode. CL is displayed (flashing)  
whenthecompressorisinlockoutmode. AUTOisdisplayed  
when the SYSTEM button has been pressed to put the  
thermostat in the automatic changeover (AUTO) mode. 1+2  
indicates the number of stages the thermostat is calling for.  
unauthorized tampering. To select this feature, press  
andSYSTEMbuttonatthesametimeandholduntilLOCK  
is displayed. To unlock the thermostat, press  
and  
SYSTEM buttons at the same time until LOCK is no longer  
displayed.  
Displays current temperature.  
6
7
°F/°C CONVERTIBILITY — Press  
and SYSTEM but-  
LOCK is displayed when keypad lockout has been acti-  
tons until the temperature display is in Celsius. To display  
Fahrenheit, repeat the process.  
vated.  
Displays current setpoint temperature (this is blank when  
SYSTEM button has been pressed to turn the system OFF).  
8
9
TEMPERATURE DISPLAY ADJUSTMENT — Your new  
thermostathasbeenaccuratelysetinourfactory.However,  
if you wish, you may adjust your new thermostat tempera-  
ture display. This can be accomplished (within a ±4°F  
range) as follows:  
LO BATTERY is displayed when approximately 70% of  
battery life has been exhausted.  
OPERATING FEATURES  
1. Press and hold  
and SYSTEM buttons at the same  
Now that you are familiar with the thermostat buttons and  
display, read the following information to learn about the many  
features of the thermostat.  
timeuntiltheactualtemperatureonlyisdisplayed(about  
5 seconds).  
2. Press  
or  
to adjust the displayed temperature to  
TEMPERATURE SETPOINT — Press  
or  
until the  
your desired setting. (To reset the temperature display  
display shows the temperature you want.  
back to the actual sensed temperature, press  
SYSTEM buttons at the same time again.)  
3. Press SYSTEM to resume normal thermostat operation.  
and  
SIMULTANEOUS HEATING/COOLING SETPOINT  
STORAGE — You can enter both your heating and cooling  
setpoints at the same time.  
AUTOMATIC CHANGEOVER —If you have a heating/  
cooling system, you can set the thermostat to automatically  
switch from heat to cool as needed to maintain setpoint  
temperature. To select this mode, press SYSTEM button  
until AUTO is displayed along with HEAT or COOL.  
TROUBLESHOOTING  
If your thermostat’s display is frozen or displaying incorrectly,  
the thermostat may have been affected by static discharge or  
voltagevariations. Ifthishappens, presstheRESETbutton(see  
fig. 2, page 2 for the location of the button). If pressing the  
RESET button does not correct the problem, contact a qualified  
service technician.  
In AUTO mode, pressing  
and  
at the same time will  
change the displayed setpoint temperature to the setpoint  
of the other mode (HEAT or COOL). This allows you to  
change both the HEAT and COOL setpoints, if desired.  
TOTAL KEYPAD LOCKOUT — This security feature al-  
lows you to lock out the thermostat buttons to prevent  
For optimum performance, we recommend replacing batteries  
once a year with fresh “AA” Energizer® alkaline batteries.  
5
 
 

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