1F86-244
Non-Programmable Electronic Digital Thermostat
WHITE-RODGERS
INSTALLATION AND
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 Thermostat uses the technol-
ogy of a solid-state microcomputer to provide precise tempera-
ture control.
• 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
Features:
• Simultaneous heat and cool set point storage
• Pre-set temperature control
• Backlit display
• B and O terminals for single stage heat pumps (no auxiliary
heat) or damper operation
• Set point storage in case of power loss
• Batterypowered(2"AA"Energizer® alkalinebatteriesincluded)
PRECAUTIONS
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.
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.
Do not exceed the specification ratings.
Allwiringmustconformtolocalandnationalelectricalcodesand
ordinances.
This control is a precision instrument, and should be handled
carefully. Roughhandlingordistortingcomponentscouldcause
the control to malfunction.
Thermostat installation and all components of the
system shall conform to Class II circuits per the NEC
code.
CAUTION
!
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.
SPECIFICATIONS
ELECTRICAL DATA
APPLICATIONS
Electrical Rating:
For use with:
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)
•
•
•
•
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
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
•
•
•
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
PART NO. 37-6174A
Printed in U.S.A.
0046
ST. LOUIS, MISSOURI 63123-5398
JUMPER
WIRE
THERMOSTAT
SYSTEM
Hot
Y
B
O
G
W
RC
RH
THERMOSTAT
SYSTEM
Y
B
O
G
W
RC
RH
Cooling
System Relay System
Fan
Heating
24 VAC
120 VAC
Neutral
Fan
Relay
Heating
System
NOTE
Hot
HEATING
For 2-wire Heat
only attach to
RH and W
TRANSFORMER
24 VAC
120 VAC
Neutral
Hot
TRANSFORMER
24 VAC
120 VAC
Neutral
Figure 2. Typical wiring diagram for
heat only, 3-wire, single transformer systems
COOLING TRANSFORMER
Figure 5. Typical wiring diagram for
heat/cool, 5-wire, two-transformer systems
JUMPER
WIRE
THERMOSTAT
Y
B
O
G
W
RC
RH
SYSTEM
JUMPER
WIRE
JUMPER
WIRE
Cooling
Fan
THERMOSTAT
SYSTEM
System Relay
Hot
Y
B
O
G
W
RC RH
24 VAC
120 VAC
Neutral
Reversing Compressor Fan
Valve*
Contactor Relay
TRANSFORMER
Hot
Figure 3. Typical wiring diagram for
cool only, 3-wire, single transformer systems
24 VAC
120 VAC
Neutral
* Reversing valve is energized when the
system switch is in the COOL position
TRANSFORMER
Figure 6. Typical wiring diagram for heat pump
with reversing valve energized in COOL
NOTE
RED jumper wire (provided with thermostat) must be
connected between thermostat RH and RC terminals
for proper thermostat operation with this system.
JUMPER
WIRE
JUMPER
WIRE
JUMPER
WIRE
THERMOSTAT
Y
B
O
G
W
RC RH
THERMOSTAT
SYSTEM
SYSTEM
Y
B
O
G
W
RC RH
Cooling
System Relay
Fan
Heating
System
Reversing Compressor Fan
Valve*
Contactor Relay
Hot
Hot
24 VAC
120 VAC
24 VAC
120 VAC
Neutral
Neutral
TRANSFORMER
* Reversing valve is energized when the
system switch is in the HEAT position
TRANSFORMER
Figure 7. Typical wiring diagram for heat pump
with reversing valve energized in HEAT
Figure 4. Typical wiring diagram for
heat/cool, 4-wire, single transformer systems
Cooling System
Heating System
1. Move SYSTEM switch to HEAT position. If the heating
CAUTION
!
system has a standing pilot, be sure to light it.
Topreventcompressorand/orpropertydamage, ifthe
outdoor temperature is below 50°F, DO NOT operate
the cooling system.
2. Press
toadjustthermostatsettingaboveroomtempera-
ture. The heating system should begin to operate.
3. Press
to adjust temperature setting below room tem-
1. Move SYSTEM switch to COOL position.
perature. The heating system should stop operating.
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.
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, pullitstraightoutfromthebase. Toreplacethecover, line
up the cover with the base and press until the cover snaps onto
the base.
1
2
FAN
SYSTEM
The Thermostat Buttons and Switches
(see fig. 8)
ON AUTO COOL OFF HEAT
1
2
3
4
Raises temperature setting.
Lowers temperature setting.
3
4
6
FAN switch (ON, AUTO).
°
F
°
C
SYSTEM switch (COOL, OFF, HEAT).
BATTERY
FILTER
The Display
5
5
9
8
7
5
Flame icon ( ) is displayed when the SYSTEM switch is in
Figure 8. Thermostat display, buttons, and switches
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.
CONFIGURATION MENU
The configuration menu allows you to set certain thermostat
operating characteristics to your system or personal require-
ments.
6
7
Displays current temperature.
Displays FILTER when the system has run for the selected
Move SYSTEM switch to the OFF position, then press
and
filter time period as a reminder to change or clean your air
filter.
at the same time to enter the configuration menu. The
display will show the first item in the configuration menu.
8
9
Displays set point temperature (this is blank when SYS-
TEM switch is in the OFF position).
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
Displays BATTERY and LO in the current temperature
menu, move the SYSTEM switch to HEAT or COOL. If no keys
are pressed within fifteen minutes, the thermostat will exit the
configuration menu.
location when the 2 "AA" batteries are low and should be
replaced.
Configuration Menu
Step
Press Button(s)
Displayed (Factory Default) Press
or
to select:
COMMENTS
1
Set SYSTEM
switch to OFF
SYSTEM switch must be OFF to configure thermostat options
Select FA or SL (Fast or Slow) heating cycle rate
SL
OFF
0 to 1950 hours
2
3
4
and
and
and
and
(FA)
d-L
(ON)
Select display backlight OFF or ON
Select Filter replacement run time
FILTER
(000)
(in 50 hour increments)
LOC
(OFF)
ON
5
6
Select Compressor lockout OFF or ON
Select temperature display adjustment higher or lower
0 HI
(0)
4 LO to
4 HI
and
and
Select temperature display to °F or °C
(°F)
°C
7
8
Returns to normal operation
Set SYSTEM
switch to HEAT
or COOL
* Press
and
to advance to next item
4
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 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.
SETTING THE THERMOSTAT
This thermostat is very easy to operate. Set the SYSTEM switch
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
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
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.
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) - Select-
ing 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.
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
6) Select Temperature Display Adjustment (4 LO to 4 HI) - If a voltage spike or static discharge blanks out the display or
Allows you to adjust the room temperature display 4° higher causes erratic thermostat operation you can reset the thermo-
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.
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.
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 — 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.
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