White Rodgers 1F83-51 User manual

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 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.
Printed in U.S.A.
DESCRIPTION
1F83-51
Non-Programmable Electronic
Digital Multi-Stage Thermostat
INSTALLATION AND
OPERATION INSTRUCTIONS
PART NO. 37-5916C
Replaces 37-5916B
0005
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.
Your new White-Rodgers Digital Multi-stage Thermostat uses
thetechnologyofasolid-statemicrocomputertoprovideprecise
temperature control.
Features:
• Simultaneous heat and cool program storage
• Optional Cterminal (dual power option)
PRECAUTIONS
SPECIFICATIONS
• LCD continuously displays room temperature
•°F/°C convertibility
• Temperature range 45°to 90°F
• Two-stage heat/two-stage cool
Thisthermostatisintendedforusewitha24-voltsystem;donot
use this thermostat with a millivolt or line voltage system. If in
doubtaboutwhetheryourwiringismillivolt,line,orlowvoltage,
have it inspected by a qualified heating and air conditioning
contractor or electrician.
Do not exceed the specification ratings.
Allwiringmustconformtolocalandnationalelectricalcodesand
ordinances.
This control is a precision instrument, and should be handled
carefully.Roughhandlingordistortingcomponentscouldcause
the control to malfunction.
ELECTRICAL DATA
Electrical Rating:
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)
THERMAL DATA
Setpoint Temperature Range:
45°F to 90°F (7°C to 32°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
APPLICATIONS
For use with:
• Heat/cool systems with up to two stages heat, two
stages cool
DO NOT USE WITH:
• Millivolt systems
• Systems exceeding 30 VAC and 1.5 amps
• 3-wire zoned hydronic heating systems
CAUTION
!
WARNING
!
WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
WHITE-RODGERS

2
INSTALLATION
REMOVE OLD THERMOSTAT
1. Shut off electricity at the main fuse box until installation is
complete. Ensure that electrical power is disconnected.
2. Remove the front cover of the old thermostat. With wires
still attached, remove wall plate from the wall. If the old
thermostathasawallmountingplate,removethethermostat
and the wall mounting plate as an assembly.
3. Identifyeachwireattachedtotheoldthermostatusingthe
labels enclosed with the new thermostat.
4. Disconnect the wires from old thermostat one at a time. DO
NOT LET WIRES FALL BACK INTO THE WALL.
5. Install new thermostat using the following procedures.
PRE-INSTALLATION SET-UP
1. Remove the packing material from the thermostat.
2. This thermostat is configured from the factory to operate a
heat/cool,fossilfuel(gas,oil, etc.),forcedairsystemwithup
to 2 stages of heat and 2 stages of cool. It is configured
correctlyforanysystemthatDOESNOTrequirethethermo-
stat to energize the fan on a call for heat.
If your system is an electric heat or heat-pump system that
REQUIRES the thermostat to turn on the fan on a call for
heat, locate the GAS/ELECTRIC switch on the back of the
thermostat (see fig. 1) and switch it to the ELECTRIC
position. This will allow the thermostat to energize the fan
immediatelyonacallforheat.Ifyouareunsureiftheheating/
cooling system requires the thermostat to control the fan,
contact a qualified heating and air conditioning service
person.
3. Ajumperislocatedonthebackofthethermostat,sothatyou
may customize the thermostat to meet your individual pref-
erence (see fig. 1). In most applications, the factory jumper
setting provides the most comfortable and convenient ther-
mostat operation.
Jumper wire W901 determines how fast the system cycles
on and off, based on temperature change. As shipped from
the factory, the thermostat will maintain a very consistent
room temperature, usually within 1°F of the thermostat
setting. To achieve a slower on and off cycle, providing a
slightly wider temperature span, cut and separate jumper
wire W901.
BATTERY LOCATION
This thermostat requires 3 “AA” alkaline batteries to operate.
Batteries are installed in the thermostat at the factory with a
battery tag to prevent power drainage. You must remove the
battery tag to engage the batteries and provide power to the
thermostat.Afterbatteriesareengaged,thermostatdisplayand
features may be viewed before installing thermostat.
IfLOWBATTERYisdisplayed,thebatteriesarelowandshould
be replaced with fresh “AA” Energizer®alkaline batteries. To
replace batteries, install the batteries along the top of the base
(see fig. 2). The batteries must be installed with the positive (+)
ends to the left.
INSTALLING THE THERMOSTAT
1. Gently remove the cover by pulling it straight off the base.
Forcing or prying on the unit may cause damage to the unit.
2. Pullwiresthroughthe hole in the thermostat base and place
the base over the hole in the wall. Mark mounting hole
locations on the wall using the base as a template.
3. Move the base out of the way. Drill mounting holes.
4. Fasten the base loosely to the wall, as shown in fig. 2, using
twomountingscrews.Placealevelagainstthebottomofthe
base, adjust until level, and then tighten the screws. (Level-
ing is for appearance only and will not affect thermostat
operation.)If you are using existing mounting holes, or if the
holesdrilledaretoolargeanddonotallowyouto tighten the
base snugly, use plastic screw anchors to secure the base.
5. Check that the SYSTEM switch is in the OFF position.
Connect the wires beneath the terminal screws on the base
usingthe appropriate wiring diagram(see figs. 3 through 5).
6. Pushexcesswireintowallandplugholewithafire-resistant
material(suchasfiberglassinsulation)topreventdraftsfrom
affecting thermostat operation.
(Instructions continue on page 4.)
Figure 1. Back of thermostat base
W901
CUT FOR
LONGER CYCLES
GAS ELECTRIC
Figure 2. Thermostat base
Mounting
holes
Reset
button
Screw anchors
Alkaline batteries (3 “AA”–
install “+” ends to the left)
C
W2
R
GYY2
W

3
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.
C* R
Y2
Compressor
Contactor
Stage 1
Heat
Relay
Stage 1
Heat
Relay
Stage 2
Thermostat
Control
Circuit
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
Y W W2
Figure 3. Typical wiring diagram for single transformer systems
Fan
Relay
G
TRANSFORMER
Compressor
Contactor
Stage 2
* The 24 Volt neutral connection
to terminal Con the thermostat
is not required if you replace
the batteries once a year with
fresh “AA” Energizer
®
alkaline
batteries.
C* R
Y2
Compressor
Contactor
Stage 1
Heat
Relay
Stage 1
Heat
Relay
Stage 2
Thermostat
Control
Circuit
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
Y W W2
Figure 4. Typical wiring diagram for two-transformer systems with NO safety circuits
Fan
Relay
G
TRANSFORMER
Compressor
Contactor
Stage 2
24 VAC120 VAC
Hot
Neutral
TRANSFORMER
TWO COMMONS MUST
BE JUMPERED TOGETHER!
CUT AND
TAPE OFF!
* The 24 Volt neutral connection
to terminal Con the thermostat
is not required if you replace
the batteries once a year with
fresh “AA” Energizer
®
alkaline
batteries.
C* R
Y2
Compressor
Contactor
Stage 1
Heat
Relay
Stage 1
Heat
Relay
Stage 2
Thermostat
Control
Circuit
Limit or
Safety
Switches
Limit or
Safety
Switches
Limit or
Safety
Switches
Limit or
Safety
Switches
24 VAC 120 VAC
Hot
Common
Common
Neutral
THERMOSTAT
SYSTEM
Y W W2
Figure 5. Typical wiring diagram for two-transformer systems with safety circuits in BOTH systems
Fan
Relay
G
HEATING
TRANSFORMER
Compressor
Contactor
Stage 2
24 VAC 120 VAC Hot
Neutral
COOLING
TRANSFORMER
TWO COMMONS MUST
BE JUMPERED TOGETHER!
24 VAC
Accessory
Relay N.O.
Contact
* The 24 Volt neutral connection
to terminal Con the thermostat
is not required if you replace
the batteries once a year with
fresh “AA” Energizer
®
alkaline
batteries.

4
CHECK THERMOSTAT OPERATION
If at any time during testing, your system does not operate
properly, contact a qualified serviceperson.
Fan Operation
1. Turn on power to the system.
2. Move SYSTEM switch to OFF position.
3. MoveFANswitchtoON.Theblowershouldbegintooperate.
4. MoveFANswitchtoAUTOposition.The blowershouldstop
within a short period of time.
Heating System
1. Move SYSTEM switch to HEAT position
2. Press toadjustthermostatsettingto90°andholdforfive
seconds.Bothstagesoftheheatingsystemshouldbeginto
operate within five seconds.
3. Press toadjusttemperaturesettingbelowroomtempera-
ture. The auxiliary heating system will stop immediately and
the first stage will stop within three to four minutes.
Cooling System
Topreventcompressorand/orpropertydamage,ifthe
outdoor temperature is below 50°F, DO NOT operate
the cooling system.
1. Move SYSTEM switch to COOL position.
2. Press toadjustthermostatsettingto45°andholdforfive
seconds. 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).
NOTE
CAUTION
!
LOCKOUT BYPASS OPTION
FOR QUALIFIED SERVICE TECHNICIANS’ USE
ONLY.OPERATORSSHOULDNOTUSETHISFEA-
TURE DUE TO POSSIBILITY OF EQUIPMENT OR
PROPERTY DAMAGE, OR PERSONAL INJURY.
COMPRESSOR SHORT TERM
CYCLE PROTECTION
During normal operation, this thermostat has a built-in
shortterm(5-minute)timedelay.Duringthis5-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,
simply press and buttons at the same time with
the SYSTEM switch in the OFF position.
DO NOT USE THE LOCKOUT BYPASS OPTION
UNLESSTHECOMPRESSOROILHEATERSHAVE
BEEN OPERATIONAL FOR 6 HOURS AND THE
SYSTEMHASNOTBEEN OPERATIONAL FORAT
LEAST 5 MINUTES.
If the fan is running but the compressor is not running and
thedisplayhasCLflashing,thecompressorlockoutfeature
is operating (see Lockout Bypass Option to temporarily
override the compressor lockout feature during testing).
3. Press toadjusttemperaturesettingaboveroomtempera-
ture. The cooling system should stop operating.

5
OPERATION
Before you begin using your thermostat, you should be familiar
with its features and with the display and the location and
operationofthethermostatbuttons.Yourthermostatconsistsof
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.
THE THERMOSTAT BASE
Other than and , the following buttons and switches are
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
1(Red arrow) Raises temperature setting.
2(Blue arrow) Lowers temperature setting.
3FAN switch (ON, AUTO).
4SYSTEM switch (COOL, OFF, HEAT).
The Display
5HT is displayed when the SYSTEM switch is in the HEAT
position. When calling for the first stage of heat, HT1 will
display. When calling for the second stage of heat, HT1+2
will display. CL is displayed (non-flashing) when the SYS-
TEM switch is in the COOL position. When calling for the
first stage of cool, CL1 will display. When calling for the
second stage of cool, CL1+2 will display. CL is displayed
(flashing) when the compressor is in lockout mode.
6Displays current temperature.
7LOWBATTERYisdisplayedwhenthe3"AA"batteriesare
lowandshouldbereplaced.Nothingelsewill bedisplayed.
8Displays current setpoint temperature. This is blank when
SYSTEM switch is in the OFF position.
OPERATING FEATURES
Now that you are familiar with the thermostat buttons and
display, read the following information to learn about the many
features of the thermostat.
•TEMPERATURE SETPOINT — Press or until the
display shows the temperature you want.
•SIMULTANEOUSHEATING/COOLINGSTORAGE—You
can enter both your heating and cooling setpoints at the
same time. There is no need to reset the thermostat at the
beginning of each season.
•LOW BATTERY INDICATOR — If the 3 “AA” alkaline
batteriesarelowandshouldbereplaced,thedisplaywillbe
blank except for the word LOW BATTERY. When the
batteriesarelow,pressinganybuttonwillcausethedisplay
to operate for ten seconds. After ten seconds, the display
willbeblankexceptforthewordLOWBATTERY.Whenthe
durationofalowbatteryconditionexceedsfourweeks,the
setpointisalteredby 10degreestosignalthatthebatteries
must be replaced.
Figure 6. Thermostat display, buttons, and switches
2
1
3 4
COOL 1+2
OFF
HEAT 1+2
5
58
7
6
COOL-OFF-HEAT
AUTO
FAN ON SYSTEM
LOW BATTERY
•°F/°C CONVERTIBILITY— When the thermostat is in the
temperaturedisplayadjustment mode, or 30 seconds after
power up, pressing and at the same time will switch
the LCD temperature display between Fahrenheit and
Celsius.
•TEMPERATURE DISPLAY ADJUSTMENT — Your new
thermostathasbeenaccuratelysetinourfactory.However,
if you wish, you may adjust your new thermostat tempera-
ture display to match your old thermostat. This can be
accomplished (within a ±4°F range) as follows:
1. Move the SYSTEM switch to OFF position.
2. Press and hold and move the SYSTEM switch to
HEAT or COOL. Release .
3. Press or to adjust the displayed temperature to
yourdesiredsetting.After settingyourdesiredtempera-
ture, do not press any buttons for ten seconds. The
thermostat will continue operating at the changed tem-
perature setting.
4. Pressing the hardware RESET button (see Fig. 2) will
return the offset to zero.
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
RESETbuttondoesnotcorrecttheproblem,contactaqualified
service technician.
For optimum performance, we recommend replacing batteries
once a year with fresh “AA” Energizer®alkaline batteries.