WHITE-RODGERS
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 Thermostat uses the technology of a solid-state microcomputer to provide precise temperature control.
Features:
• Simultaneous heat and cool set point storage
• Pre-set temperature control
• Backlit display
• Battery powered (2 "AA" Energizer® alkaline batteries included)
1F86-244
Non-Programmable Electronic Digital Thermostat
INSTALLATION AND
OPERATION INSTRUCTIONS
DESCRIPTION
• LCD continuously displays set point and room temperature
• °F/°C convertibility
• Temperature range 45° to 90°F
• RC, RH, W, Y, G , O and B terminals
• B and O terminals for single stage heat pumps (no auxiliary
heat) or damper operation
• Set point storage in case of power loss
PRECAUTIONS
This thermostat is intended for use with a low voltage system; do
not use this thermostat with a 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.
Do not exceed the specification ratings.
All wiring must conform to local and national electrical codes and
ordinances.
This control is a precision instrument, and should be handled
carefully. Rough handling or distorting components could cause
the control to malfunction.
CAUTION
!
To prevent electrical shock and/or equipment damage, disconnect electric power to system at main fuse
or circuit breaker box until installation is complete.
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
WARNING
!
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.
SPECIFICATIONS
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
WHITE-RODGERS DIVISION
EMERSON ELECTRIC CO.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
Printed in U.S.A.
PART NO. 37-6174A
0046
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
thermostat has a wall mounting plate, remove the thermostat
and the wall mounting plate as an assembly.
3. Identify each wire attached to the old thermostat using the
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
up the spilled mercury with sand or other absorbent material and
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
This thermostat is configured from the factory to operate a heat/
cool, fossil fuel (gas, oil, etc.), forced air system. It is configured
correctly for any system that DOES NOT require the thermostat
to energize the fan on a call for heat. If your system is an electric
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 immediately on a call for heat. If you are unsure if the
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. Remove the packing material from the thermostat. Gently pull the
cover straight off the base. Forcing or prying on the thermostat will
cause damage to the unit. If necessary, move the electric heat
switch (see ELECTRIC HEAT SYSTEMS, above).
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.
Screw anchors
Mounting
holes
6. Push excess wire into wall and plug hole with a fire-resistant
material (such as fiberglass insulation) to prevent drafts from
affecting thermostat operation.
Electric/Gas
switch
Mounting
holes
Figure 1. Thermostat Base
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.
If LO BATTERY is displayed, the batteries are low and should be
replaced with fresh "AA" Energizer® alkaline batteries. To replace batteries, install the batteries along the top of the base
(see Fig. 1). The batteries must be installed 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
heating system. If you have a hydronic heating system (a system
that heats with hot water or steam), you must set the thermostat
to operate properly with your system. Change the second option
in the configuration menu to SL (see CONFIGURATION MENU,
page 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 G terminal connection, skip to
Heating System.
1. Move fan switch to ON position. The blower should begin to
operate.
2. Move fan switch to AUTO position. The blower should stop
immediately.
2
JUMPER
WIRE
OB
NOTE
For 2-wire Heat
only attach to
Y
G W
Fan
Relay
RC
Heating
System
RH
24 VAC
THERMOSTAT
RH and W
TRANSFORMER
Figure 2. Typical wiring diagram for
heat only, 3-wire, single transformer systems
JUMPER
WIRE
Y
Cooling
System
G W
Fan
Relay
RCOB
THERMOSTAT
RH
24 VAC
TRANSFORMER
SYSTEM
Figure 3. Typical wiring diagram for
cool only, 3-wire, single transformer systems
SYSTEM
120 VAC
Hot
120 VAC
Neutral
Hot
Neutral
OB
Y
Cooling
System
G W
Fan
Relay
RC
Heating
System
THERMOSTAT
RH
SYSTEM
24 VAC
HEATING
TRANSFORMER
24 VAC
COOLING TRANSFORMER
Figure 5. Typical wiring diagram for
heat/cool, 5-wire, two-transformer systems
JUMPER
WIRE
Y
Reversing
Valve*
* Reversing valve is energized when the
system switch is in the COOL position
Compressor
Contactor
G W
Fan
Relay
JUMPER
WIRE
RCOB
24 VAC
THERMOSTAT
RH
SYSTEM
TRANSFORMER
Hot
120 VAC
Neutral
Figure 6. Typical wiring diagram for heat pump
with reversing valve energized in COOL
Hot
120 VAC
Neutral
Hot
120 VAC
Neutral
RED jumper wire (provided with thermostat) must be
connected between thermostat RH and RC terminals
for proper thermostat operation with this system.
Y
OB
Cooling
System
G W
Fan
Relay
Heating
System
JUMPER
WIRE
RC
24 VAC
THERMOSTAT
RH
SYSTEM
TRANSFORMER
Hot
120 VAC
Neutral
Figure 4. Typical wiring diagram for
heat/cool, 4-wire, single transformer systems
Heating System
1. Move SYSTEM switch to HEAT position. If the heating
system has a standing pilot, be sure to light it.
NOTE
2. Press
ture. The heating system should begin to operate.
3. Press
perature. The heating system should stop operating.
to adjust thermostat setting above room tempera-
to adjust temperature setting below room tem-
JUMPER
WIRE
Y
Reversing
Valve*
* Reversing valve is energized when the
system switch is in the HEAT position
Compressor
Contactor
G W
Fan
Relay
JUMPER
WIRE
RH
RCOB
24 VAC
THERMOSTAT
SYSTEM
Hot
120 VAC
TRANSFORMER
Neutral
Figure 7. Typical wiring diagram for heat pump
with reversing valve energized in HEAT
Cooling System
CAUTION
!
To prevent compressor and/or property damage, if the
outdoor temperature is below 50°F, DO NOT operate
the cooling system.
1. Move SYSTEM switch to COOL position.
2. Press
ture. The blower should come on immediately on high speed,
followed by cold air circulation
3. Press to adjust temperature setting above room temperature. The cooling system should stop operating.
to adjust thermostat setting below room tempera-
3
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, pull it straight out from the base. To replace the cover, line
up the cover with the base and press until the cover snaps onto
the base.
1
2
The Thermostat Buttons and Switches
(see fig. 8)
1
Raises temperature setting.
Lowers temperature setting.
2
3
FAN switch (ON, AUTO).
SYSTEM switch (COOL, OFF, HEAT).
4
The Display
5
Flame icon ( ) is displayed when the SYSTEM switch is in
the HEAT position. Snowflake icon (
flashing) when the SYSTEM switch is in the COOL position.
Snowflake is displayed (flashing) if the thermostat is in
lockout mode to prevent the compressor from cycling too
quickly.
6
Displays current temperature.
7
Displays FILTER when the system has run for the selected
filter time period as a reminder to change or clean your air
filter.
8
Displays set point temperature (this is blank when SYSTEM 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.
)is displayed (non-
FAN SYSTEM
ON AUTO COOL OFF HEAT
3 4
°
F
BATTERY FILTER
5
8 79
°
C
56
Figure 8. Thermostat display, buttons, and switches
CONFIGURATION MENU
The configuration menu allows you to set certain thermostat
operating characteristics to your system or personal requirements.
Move SYSTEM switch to the OFF position, then press
at the same time to enter the configuration menu. The
display will show the first item in the configuration menu.
The configuration menu chart below summarizes the configura-
tion options. An explanation of each option follows.
Press and to change to the next menu item. To exit the
menu, move the SYSTEM switch to HEAT or COOL. If no keys
are pressed within fifteen minutes, the thermostat will exit the
configuration menu.
and
Configuration Menu
Step Press Button(s) Displayed (Factory Default) Press or to select: COMMENTS
1
2
3
4
5
6
7
8
* Press and
Set SYSTEM
switch to OFF
and
and
and
and
and
and
Set SYSTEM
switch to HEAT
or COOL
to advance to next item
(FA)
d-L
(ON)
FILTER
(000)
LOC
(OFF)
0 HI
(0)
(°F) °C
0 to 1950 hours
(in 50 hour increments)
SL
OFF
ON
4 LO to
4 HI
4
SYSTEM switch must be OFF to configure thermostat options
Select FA or SL (Fast or Slow) heating cycle rate
Select display backlight OFF or ON
Select Filter replacement run time
Select Compressor lockout OFF or ON
Select temperature display adjustment higher or lower
Select temperature display to °F or °C
Returns to normal operation
2) Select FA or SL (Fast or Slow) Heating Cycle Rate - The
FA setting is frequently used for gas, oil or electric heat. The
SL setting produces a longer heating cycle which is normally for hot water or steam (hydronic) systems. Both
settings produce very accurate temperature control and
can be set to your personal preference. FA cycles the
system just under 1°F and the SL setting cycles at approximately 1.5°F.
3) Select Display Backlight (d-L OFF or ON) - The display
backlight improves display contrast in low lighting conditions. Selecting backlight ON will keep the light on for a short
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 cancel this feature. When FILTER
is displayed, you can clear it by pressing and at
the same time. This resets the timer and starts counting the
hours until the next filter change.
5) Select Compressor Lockout (LOC OFF or ON) - Selecting LOC ON will cause the thermostat to wait 5 minutes
before turning on the compressor if the heating and cooling
system loses power. It will also wait 5 minutes minimum
between cooling cycles. This is intended to help protect the
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) Allows you to adjust the room temperature display 4° higher
or lower. Your thermostat was accurately calibrated at the
factory but you have the option to change the display
temperature to match your previous thermostat.
7) Select Temperature DIsplay (
display readout to Celsius or Fahrenheit as required.
°F or °C) - Changes the
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 — You can enter both your heating and cooling
set points at the same time. There is no need to change the
thermostat at the beginning of each season.
• CONFIGURATION MENU — Allows you to customize
certain thermostat options.
SETTING THE THERMOSTAT
This thermostat is very easy to operate. Set the SYSTEM switch
to either HEAT or COOL then press
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. There can be up to a 5 minute compressor lock-out time
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
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 purchase.
, and move the SYSTEM switch from
or until the
5
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