1F83-261
Non-Programmable Electronic Digital
Multi-Stage Thermostat
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
• Backlit display when any key is pushed
• °F/°C convertibility
Your new White-Rodgers Digital Thermostat uses the technol-
ogy of a solid-state microcomputer to provide precise time/
temperature control. This thermostat offers you the flexibility to
design heating and cooling programs that fit your needs.
• Temperature range 45° to 90°F
• R, C, W, W2, G , Y and Y2 terminals
• Optional C terminal (Dual Power option)
• Setpoint storage in case of power loss
• 2 “AA” Energizer® alkaline batteries included
Features:
• Simultaneous heat and cool setpoint storage
• Pre-set temperature control
• LCD continuously displays setpoint and room temperature
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.
! WARNING
▲
Do not use on circuits exceeding specified voltage.
Higher voltage will damage control and could cause
shock or fire hazard.
Do not exceed the specification ratings.
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.
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.
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 damage,
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:
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
• Systems exceeding 30 VAC and 1.5 amps
• 3-wire zoned hydronic heating systems
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
WHITE-RODGERS
PART NO. 37-6321A
EMERSON ELECTRIC CO.
Printed in U.S.A.
9797 REAVIS ROAD
ST. LOUIS, MISSOURI 63123-5398
www.white-rodgers.com
0143
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!
NOTE
▲
The following wiring diagrams show typical terminal
identification 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
the batteries once a year with
fresh “AA” Energizer® alkaline
batteries.
Thermostat
Control
Circuit
THERMOSTAT
SYSTEM
W2
C*
R
Y
Y2
G
W
Heat
Relay
Compressor
Contactor
Stage 2
Stage 1
Hot
24 VAC
120 VAC
Compressor
Contactor
Stage 1
Heat
Relay
Neutral
TRANSFORMER
Fan
Relay
Stage 2
Figure 2. 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
CUT AND
TAPE OFF!
W2
C*
R
Y
Y2
G
W
SYSTEM
Hot
Heat
Relay
Compressor
Contactor
Stage 2
120 VAC
24 VAC
Stage 1
Hot
Neutral
24 VAC
120 VAC
Neutral
TRANSFORMER
Compressor
Contactor
Stage 1
Heat
Relay
Fan
Relay
TRANSFORMER
Stage 2
TWO COMMONS MUST
BE JUMPERED TOGETHER!
Figure 3. 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
W2
C*
R
Y
Y2
G
W
Heat
Relay
Compressor
Contactor
Stage 2
Limit or
Safety
Switches
Stage 1
Limit or
Safety
Switches
Hot
24 VAC
120 VAC
Neutral
Compressor
Contactor
Stage 1
Heat
Relay
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 4. Typical wiring diagram for two-transformer systems with safety circuits in BOTH systems
3
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Cooling System
Heating 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 HEAT position. If the heating
system has a standing pilot, be sure to light it.
2. Press
to adjust thermostat setting above room tempera-
ture. The heating system should begin to operate.
1. Move SYSTEM switch to COOL position.
3. Both stages of the heating system should begin to operate
when the setpoint is set greater than 3°F above ambient.
2. Press
to adjust thermostat setting below room tempera-
ture. The blower should come on immediately on high
speed, followed by cold air circulation.
4. Press
to adjust temperature setting below room tem-
perature. The heating system should stop operating.
3. Both stages of the cooling system should begin to operate
when the setpoint is set greater than 3°F below ambient.
4. Press
to adjust temperature setting above room tem-
perature. The cooling system should stop operating.
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 figure 5)
FAN
SYSTEM
ON AUTO COOL OFFHEAT
➀
➁
➂
➃
Raises temperature setting.
Lowers temperature setting.
FAN switch (ON, AUTO).
10
3
4
SYSTEM switch (COOL, OFF, HEAT).
1 + 2
F
C
The Display
BATTERY
FILTER
➄
Flame icon ( ) is displayed when the SYSTEM switch is in
the HEAT position. Snowflake icon ( )is displayed (non-
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.
5
6
5
9
8
7
Figure 5. Thermostat display, buttons, and switches
➅
➆
Displays current temperature.
CONFIGURATION MENU
The configuration menu allows you to set certain thermostat
operating characteristics to your system or personal require-
ments.
Displays FILTER when the system has run for the selected
filter time period as a reminder to change or clean your air
filter.
➇
➈
Displays setpoint temperature (this is blank when SYS-
TEM switch is in the OFF position).
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.
Displays BATTERY and LO in the current temperature
location when the 2 "AA" batteries are low and should be
replaced.
The configuration menu chart below summarizes the configura-
tion options. An explanation of each option follows.
➉
1 indicates first stage is energized.
+2 indicates second stage is energized.
Press
and
at the same time 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.
4
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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
2
3
4
and
and
and
and
(FA)
d-L
(ON)
OFF
Select display backlight OFF or ON
Select Filter replacement run time
FILTER
(000)
0 to 1950 hours
(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
Select temperature display to F or C
( F)
C
7
8
and
and
1 + 2
FA
Select ON to start 2nd stage immediately when the setpoint
is manually raised more than 3˚F in HEAT or lowered more
than 3˚F in COOL from room temperature
OFF
(ON)
Returns to normal operation
Set SYSTEM
switch to HEAT
or COOL
9
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. 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.
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
setpoints 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.
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 FIL-
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.
TER 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.
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
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
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.
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.
Batteries
8) Select Stage Fast (ON or OFF) - When selected ON, the
second stage starts as soon as the setpoint temperature is
manually raised 3°F in heat or lowered 3°F in cool from
room temperature. When selected OFF, the second stage
will delay approximately 15 minutes before starting.
For optimum performance, we recommend replacing batteries
once a year with fresh "AA" Energizer® alkaline batteries.
5
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TROUBLESHOOTING
Symptom
Possible Cause
Corrective Action
No Heat/No Cool/No Fan
(common problems)
1. Blown fuse or tripped circuit breaker.
2. Furnace power switch to OFF.
3. Furnace blower compartment door or
panel loose or not properly installed.
1. Pilot light not lit.
Replace fuse or reset breaker.
Turn switch to ON.
Replace door panel in proper position to engage
safety interlock or door switch.
Re-light pilot.
No Heat
2. System Switch not set to Heat.
Set System Switch to Heat and raise setpoint
above room temperature.
3. Loose connection to thermostat or system.
Verify thermostat and system wires are securely
attached.
4. Furnace Lock-Out Condition. Heat may also
be intermittent.
Many furnaces have safety devices that shut the
system down when a lock-out condition occurs.
If the heat works intermittently contact the furnace
manufacturer or local service person for assistance.
Diagonistic: Set System Switch to Heat and raise
the setpoint above room temperature. Within a few
seconds the thermostat should make a soft click
sound. This sound usually indicates the thermostat
is operating properly. If the thermostat does not
click, try the reset operation listed above. If the
thermostat does not click after being reset contact
your heating and cooling service person or place
of purchase for a replacement. If the thermostat
clicks, contact the furnace manufacturer or a
service person to verify the heating system is
operating correctly.
5. Heating System requires service or
thermostat requires replacement.
No Cool
1. System Switch not set to Cool.
Set System Switch to Cool and lower setpoint
below room temperature.
2. Loose connection to thermostat or system.
Verify thermostat and system wires are securely
attached.
3. Cooling System requires service or thermostat
requires replacement.
Same procedure as diagnostic for No Heat
condition except set the thermostat to Cool and
lower the setpoint below the room temperature.
There may be up to a five minute delay before
the thermostat clicks in Cooling if the compressor
lock-out option is selected in the configuration
menu (Item 6).
Heat, Cool or Fan Runs Constantly.
1. Fan Switch set to Fan On.
2. Possible short in wiring.
3. Possible short in thermostat.
4. Possible short in Heat/Cool/Fan system.
Check each wire connection to verify they are
not shorted or touching together. No bare wire
should stick out from under terminal screws.
Try resetting the thermostat. If the condition
persists the manufacturer of your system
or service person can instruct you on how
to test the Heat/Cool system for correct
operation. If the system operates correctly,
replace the thermostat.
Furnace Cycles Too Fast or Too Slow
(narrow or wide temperature swing)
1. The location of the thermostat and/or the size
of the Heating System may be influencing the
cycle rate.
Item 2 in the Configuration Menu is the adjustment
that controls the cycle rate. If an acceptable cycle
rate is not achieved using the FA (Fast) or SL
(Slow) adjustment contact a local service person for
additional suggestions.
Cooling Cycles Too Fast or Too Slow
(narrow or wide temperature swing)
1. The location of the thermostat and/or the size
of the Cooling System may be influencing the
cycle rate.
The cycle rate for cooling is fixed and can not be
adjusted. Contact a local service person for
suggestions.
Thermostat Setting and Thermometer
Disagree
1. Thermostat thermometer setting requires
adjustment.
The thermometer can be adjusted +/- 4 degrees as
listed in item 7 of the Configuration Menu. No other
adjustment is possible.
Blank Display and/or Keypad Not
Responding
1. Loss of power and dead batteries.
2. Voltage Spike or Static Discharge.
Replace batteries and check heat/cool system for
proper operation. If a voltage spike or static discharge
occurs use the Reset Operation listed above.
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