White Rodgers 1f86-244 User manual

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.
Thermostat installation and all components of the
system shall conform to Class II circuits per the NEC
code.
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 Thermostat uses the technol-
ogy of a solid-state microcomputer to provide precise tempera-
ture control.
Features:
• Simultaneous heat and cool set point storage
• Pre-set temperature control
• Backlit display
• Batterypowered(2"AA"Energizer®alkalinebatteriesincluded)
• LCDcontinuouslydisplayssetpointandroomtemperature
•°F/°C convertibility
• Temperature range 45°to 90°F
• RC, RH, W, Y, G , O and B terminals
• BandOterminalsforsinglestageheatpumps(noauxiliary
heat) or damper operation
• Set point storage in case of power loss
SPECIFICATIONS
ELECTRICAL DATA
Electrical Rating:
8 to 30 VAC 50/60 Hz. or D.C.
0.05 to 1.0 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:
-4°F to 150°F
APPLICATIONS
For use with:
• Standard heat/cool or heat only systems
• Electric heat systems
• Gas or oil fired systems
• Gas systems with intermittent ignition devices (I.I.D.)
and/or vent dampers
• Hydronic (hot water or steam) systems
• Single-stage heat pump systems (no auxiliary heat)
• Millivolt systems
DO NOT USE WITH:
• Multi-stage systems
• Systems exceeding 30 VAC and 1.5 amps
• 3-wire zoned hydronic heating systems
1F86-244
Non-Programmable Electronic Digital Thermostat
Printed in U.S.A. PART NO. 37-6174A
0046
WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
INSTALLATION AND
OPERATION INSTRUCTIONS
PRECAUTIONS
CAUTION
!
Thisthermostatisintendedforusewithalowvoltagesystem;do
not use this thermostat with a line voltage system. If in doubt
about whether your wiring is millivolt, line, or low voltage, have
itinspectedbyaqualifiedheatingandairconditioningcontractor
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.
To prevent electrical shock and/or equipment dam-
age, disconnect electric power to system at main fuse
or circuit breaker box until installation is complete.
WARNING
!
Operator: Save these instructions for future use!
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.
ATTENTION!
This product does not contain mercury. However, 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 nonabsorbent gloves, take
upthespilledmercurywithsandorotherabsorbentmaterialand
place into a container which can be sealed. If a cell becomes
damaged, the unit should be discarded.
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 at 9797 Reavis
Road, St. Louis, MO, 63123-5398 for proper disposal.
ELECTRIC HEAT OR SINGLE-STAGE
HEAT PUMP SYSTEMS
Thisthermostatisconfiguredfromthe factory tooperateaheat/
cool,fossil fuel (gas, oil, etc.), forced air system. It is configured
correctlyforany system thatDOESNOT requirethethermostat
toenergizethefanonacallforheat.Ifyoursystemisanelectric
heat or heat-pump system that REQUIRES the thermostat to
turn on the fan on a call for heat, locate the GAS/ELECTRIC
switch onthe back of the thermostat (see fig.1) and switch it to
the ELECTRIC position. This will allow the thermostat to ener-
gizethefanimmediatelyonacallforheat.Ifyouareunsureifthe
heating/cooling system requires the thermostat to control the
fan, contact a qualified heating and air conditioning service
person.
ATTACH THERMOSTAT BASE TO WALL
1. Removethepackingmaterialfromthethermostat.Gentlypullthe
coverstraightoffthebase.Forcingorpryingonthethermostatwill
cause damage to the unit. If necessary, move the electric heat
switch (see ELECTRIC HEAT SYSTEMS, above).
2. Connect wires beneath terminal screws on base using
appropriate wiring schematic (see figs. 2 through 7).
3. Place base over hole in wall and mark mounting hole
locations on wall using base as a template.
4. Move base out of the way. Drill mounting holes.
5. Fasten base loosely to wall, as shown in fig. 1, using two
mounting screws. Place a level against bottom of base,
adjust until level, and then tighten screws. (Leveling is for
appearance only and will not affect thermostat operation.) If
you are using existing mounting holes, or if holes drilled are
too large and do not allow you to tighten base snugly, use
plastic screw anchors to secure subbase.
6. Pushexcesswire intowalland plughole with afire-resistant
material(suchasfiberglassinsulation)topreventdraftsfrom
affecting thermostat operation.
BATTERY LOCATION
This thermostat requires 2 "AA" alkaline batteries to operate.
Batteries are included 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.
IfLOBATTERYisdisplayed,thebatteriesarelowandshouldbe
replaced with fresh "AA" Energizer®alkaline batteries. To re-
place batteries, install the batteries along the top of the base
(seeFig. 1).The batteriesmust beinstalled with the positive (+)
end to the left.
HYDRONIC (HOT WATER OR STEAM)
HEATING SYSTEMS
This thermostat is set to operate properly with a forced-air
heatingsystem.Ifyouhaveahydronicheatingsystem(asystem
thatheatswithhot waterorsteam),you mustsetthethermostat
tooperateproperlywithyoursystem.Changethesecondoption
intheconfigurationmenutoSL(seeCONFIGURATIONMENU,
page 4).
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 Gterminal 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.
Mounting
holes
Mounting
holes Electric/Gas
switch
Screw anchors
Figure 1. Thermostat Base

3
RH
Y
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G W
Figure 5. Typical wiring diagram for
heat/cool, 5-wire, two-transformer systems
HEATING
TRANSFORMER
Heating
System
Fan
Relay
Cooling
System
RC
24 VAC 120 VAC
Hot
Neutral
COOLING TRANSFORMER
OB
RH
Y
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G W
Figure 4. Typical wiring diagram for
heat/cool, 4-wire, single transformer systems
TRANSFORMER
Heating
System
Fan
Relay
Cooling
System
RC
JUMPER
WIRE
OB
RED jumper wire (provided with thermostat) must be
connected between thermostat RH and RC terminals
for proper thermostat operation with this system.
NOTE
RH
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G W
Figure 2. Typical wiring diagram for
heat only, 3-wire, single transformer systems
TRANSFORMER
Heating
System
Fan
Relay
YRC
JUMPER
WIRE
OB
For 2-wire Heat
only attach to
RH and W
NOTE
RH
Y
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G W
Figure 7. Typical wiring diagram for heat pump
with reversing valve energized in HEAT
TRANSFORMER
Reversing
Valve*
RCOB
JUMPER
WIRE
Compressor
Contactor
JUMPER
WIRE
* Reversing valve is energized when the
system switch is in the HEAT position
Fan
Relay
RH
Y
24 VAC 120 VAC
Hot
Neutral
TRANSFORMER
THERMOSTAT
SYSTEM
G W
Figure 3. Typical wiring diagram for
cool only, 3-wire, single transformer systems
Cooling
System Fan Relay
RCOB
JUMPER
WIRE
RH
Y
24 VAC 120 VAC
Hot
Neutral
THERMOSTAT
SYSTEM
G W
Figure 6. Typical wiring diagram for heat pump
with reversing valve energized in COOL
TRANSFORMER
Reversing
Valve*
RCOB
JUMPER
WIRE
Compressor
Contactor
JUMPER
WIRE
* Reversing valve is energized when the
system switch is in the COOL position
Fan
Relay
Heating System
1. Move SYSTEM switch to HEAT position. If the heating
system has a standing pilot, be sure to light it.
2. Press toadjustthermostatsettingaboveroomtempera-
ture. The heating system should begin to operate.
3. Press to adjust temperature setting below room tem-
perature. The heating system should stop operating.
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 toadjustthermostatsettingbelowroomtempera-
ture.Theblowershouldcomeonimmediatelyonhighspeed,
followed by cold air circulation
3. Press to adjust temperature setting above room tem-
perature. The cooling system should stop operating.
CAUTION
!

4
CONFIGURATION MENU
The configuration menu allows you to set certain thermostat
operating characteristics to your system or personal require-
ments.
Move SYSTEM switch to the OFF position, then press and
at the same time to enter the configuration menu. The
display will show the first item in the configuration menu.
Theconfigurationmenuchartbelowsummarizestheconfigura-
tion options. An explanation of each option follows.
Press and tochangetothe nextmenuitem.To exitthe
menu, move the SYSTEM switch to HEAT or COOL. If no keys
are pressed within fifteen minutes, the thermostat will exit the
configuration menu.
1
Step Press Button(s) Displayed (Factory Default) Press or to select: COMMENTS
Set SYSTEM
switch to OFF
Set SYSTEM
switch to HEAT
or COOL
2
(FA) SL
SYSTEM switch must be OFF to configure thermostat options
8
LOC
(OFF) ON
0 HI
(0) 4 LO to 4 HI
(°F) °C
Returns to normal operation
Select Compressor lockout OFF or ON
Select temperature display adjustment higher or lower
Select temperature display to °F or °C
and
3
d-L
(ON) OFF
Select display backlight OFF or ON
Select FAor SL (Fast or Slow) heating cycle rate
Configuration Menu
* Press and to advance to next item
and
and
and
and
4
5
6
7
FILTER
(000) 0 to 1950 hours (in 50 hour increments)
Select Filter replacement run time
and
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,pullitstraightoutfromthebase.Toreplacethecover,line
up the cover with the base and press until the cover snaps onto
the base.
The Thermostat Buttons and Switches
(see fig. 8)
1
Raises temperature setting.
2
Lowers temperature setting.
3
FAN switch (ON, AUTO).
4
SYSTEM switch (COOL, OFF, HEAT).
The Display
5
Flame icon ( ) is displayed whenthe SYSTEM switchis in
the HEAT position. Snowflake icon ( )is displayed (non-
flashing)whentheSYSTEMswitchisintheCOOLposition.
Snowflake is displayed (flashing) if the thermostat is in
lockout mode to prevent the compressor from cycling too
quickly.
6
Displays current temperature.
7
DisplaysFILTER whenthesystem hasrunfor the selected
filter time period as a reminder to change or clean your air
filter.
8
Displays set point temperature (this is blank when SYS-
TEM switch is in the OFF position).
9
Displays BATTERY and LO in the current temperature
location when the 2 "AA" batteries are low and should be
replaced.
2
1
3 4
5
8 79 56
Figure 8. Thermostat display, buttons, and switches
FAN SYSTEM
ON AUTO COOL OFF HEAT
° F ° C
BATTERY FILTER
OPERATION

5
2) Select FA or SL (Fast orSlow) Heating Cycle Rate -The
FAsettingisfrequentlyusedforgas,oilorelectricheat.The
SL setting produces a longer heating cycle which is nor-
mally 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 1°F and the SL setting cycles at approxi-
mately 1.5°F.
3) Select Display Backlight (d-L OFF or ON) - The display
backlight improves display contrast in low lighting condi-
tions.SelectingbacklightONwillkeepthelightonforashort
period of time after any key is pressed. Selecting OFF will
keep the light off.
4) Select filter replacement run time - The thermostat will
display FILTER after the selected 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 cancelthis feature. WhenFILTER
is displayed, you can clear it by pressing and at
thesametime. Thisresets thetimer andstarts countingthe
hours until the next filter change.
5) Select Compressor Lockout (LOC OFF or ON) - Select-
ing LOC ON will cause the thermostat to wait 5 minutes
beforeturning on the compressor ifthe heatingand cooling
system loses power. It will also wait 5 minutes minimum
betweencooling cycles. Thisis intendedto helpprotect the
compressor 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.
6) Select Temperature Display Adjustment (4 LO to 4 HI) -
Allowsyoutoadjusttheroomtemperaturedisplay4°higher
or lower. Your thermostat was accurately calibrated at the
factory but you have the option to change the display
temperature to match your previous thermostat.
7) Select Temperature DIsplay (°F or °C) - Changes the
display readout to Celsius or Fahrenheit as required.
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.
•SIMULTANEOUS HEATING/COOLING SETPOINT
STORAGE—Youcanenterbothyourheatingandcooling
setpointsatthesametime. There isnoneedtochangethe
thermostat at the beginning of each season.
•CONFIGURATION MENU — Allows you to customize
certain thermostat options.
SETTING THE THERMOSTAT
Thisthermostatisveryeasytooperate.SettheSYSTEMswitch
to either HEAT or COOL then press or until the
temperature you want to maintain is shown on the right side of
the display. If you want to turn the system off, just move the
SYSTEM switch to OFF.
The FAN switch controls the fan operation. When the FAN
switch is set to AUTO, the fan will cycle with the furnace or air
conditioner. When the FAN switch is set to ON, the fan will run
continuously, regardless of SYSTEM switch position.
TROUBLESHOOTING
No Heating
With the SYSTEM switch set to HEAT, when the setpoint
temperature is raised or lowered past the room temperature,
the thermostat will make a soft click sound. Usually, the sound
indicates the thermostat is operating correctly. If the system
does not come on, check the system or contact your heating/
cooling service person. If the thermostat does not click try the
Reset Operation listed below.
No Cooling
Same procedure as heating except set SYSTEM switch to
COOL.Therecanbeuptoa5minutecompressorlock-outtime
delay before the thermostat clicks in COOL.
Blank Display
A blank digital display usually indicates the thermostat has
received a voltage spike, static discharge or requires new
batteries. If the display remains blank after replacing the
batteries, see Reset Operation below.
Reset Operation
If a voltage spike or static discharge blanks out the display or
causes erratic thermostat operation you can reset the thermo-
stat by pressing , and move the SYSTEM switch from
OFF to HEAT at the same time. This also resets the factory
defaults to the configuration menu. If the thermostat has
power, has been reset and still does not function correctly
contact your heating/cooling service person or place of pur-
chase.