1F86-444
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.
• °F/°C convertibility
• Temperature range 45° to 90°F
• Standard five terminals for single or two-transformer sys-
tems
Features:
• Battery powered (3 “AA” Energizer® alkaline batteries in-
cluded).
• B and O terminals for single stage heat pumps or damper
operation
• Simultaneous heat and cool temperature storage
• LCD continuously displays set point and room temperature
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.
!
To prevent electrical shock and/or equipment dam-
age, disconnectelectricpowertosystem, atmainfuse
or circuit breaker box, until installation is complete.
Do not exceed the specification ratings.
WARNING
!
Allwiringmustconformtolocalandnationalelectricalcodesand
ordinances.
Do not use on circuits exceeding specified voltage.
Higher voltage will damage control and could cause
shock or fire hazard.
This control is a precision instrument, and should be handled
carefully. Roughhandlingordistortingcomponentscouldcause
the control to malfunction.
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.
SPECIFICATIONS
ELECTRICAL DATA
APPLICATIONS
Electrical Rating:
For use with:
8 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)
•
•
•
•
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/
THERMAL DATA
or vent dampers
•
•
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
Single-stage heat pump systems
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
PART NO. 37-5410C
Replaces 37-5410B
9805
Printed in U.S.A.
R
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JUMPER
WIRE
THERMOSTAT
Y
B
O
G
W
RC
RH
THERMOSTAT
SYSTEM
SYSTEM
Hot
Y
B
O
G
W
RC
RH
Cooling
System Relay System
Fan
Heating
24 VAC
120 VAC
NOTE
Fan
Relay
Heating
System
RED jumper wire (provided
with thermostat) must be
connected between thermo-
stat's RH and RC terminals
for proper thermostat oper-
ation with this system.
Neutral
Hot
HEATING TRANSFORMER
Hot
24 VAC
120 VAC
Neutral
24 VAC
120 VAC
TRANSFORMER
Neutral
Figure 5. Typical wiring diagram for
heat only, 3-wire, single transformer systems
COOLING TRANSFORMER
Figure 8. Typical wiring diagram for
heat/cool, 5-wire, two-transformer systems
THERMOSTAT
Y
B
O
G
W
RC
RH
SYSTEM
JUMPER
WIRE
JUMPER
WIRE
THERMOSTAT
SYSTEM
Cooling
System
Fan
Relay
Y
B
O
G
W
RC RH
Hot
24 VAC
120 VAC
Neutral
Changeover Compressor Fan
Relay*
Contactor Relay
Hot
24 VAC
120 VAC
Neutral
Figure 6. Typical wiring diagram for
cool only, 3-wire, single transformer systems
* Changeover relay is energized when the
system switch is in the COOL position
TRANSFORMER
Figure 9. Typical wiring diagram for
heat pump with cool active changeover relay
JUMPER
WIRE
THERMOSTAT
Y
B
O
G
W
RC RH
JUMPER
WIRE
JUMPER
WIRE
SYSTEM
THERMOSTAT
SYSTEM
NOTE
Y
B
O
G
W
RC RH
Cooling
System
Fan
Relay
Heating
System
RED jumper wire (provided
with thermostat) must be
connected between thermo-
stat's RH and RC terminals
for proper thermostat oper-
ation with this system.
Hot
Changeover Compressor Fan
Relay*
Contactor Relay
24 VAC
120 VAC
Hot
Neutral
TRANSFORMER
24 VAC
120 VAC
Neutral
* Changeover Relay is energized when the
system switch is in the HEAT position
TRANSFORMER
Figure 7. Typical wiring diagram for
heat/cool, 4-wire, single transformer systems
Figure 10. Typical wiring diagram for
heat pump with heat active changeover relay
Cooling System
CHECK THERMOSTAT OPERATION
This thermostat has a built-in short-term (5-minute) time delay.
This feature is activated after the compressor shuts down and
the setpoint is changed within the 5-minute period. During this
5-minute period, COOL will flash on the display indicating that
the thermostat has locked out the compressor to allow head
pressure to stabilize. This thermostat does not sense AC power
loss and therefore does not activate the short term compressor
protection feature when power is restored.
If at any time during testing your system does not operate
properly, contact a qualified serviceperson.
Fan Operation
If your system does not have a G terminal connection, skip to
Heating System.
1. Turn on power to the system.
2. Move FAN switch to ON position. The blower should begin
CAUTION
!
to operate.
Topreventcompressorand/orpropertydamage, ifthe
outdoor temperature is below 50°F, DO NOT operate
the cooling system.
3. Move FAN switch to AUTO position. The blower should stop
immediately.
Heating System
1. Move SYSTEM switch to COOL position.
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 below room tempera-
ture.Theblowershouldcomeonimmediatelyonhighspeed,
followed by cold air circulation
2. Press
to adjust thermostat setting above room tempera-
ture. The heating system should begin to operate.
3. Press
toadjusttemperaturesettingaboveroomtempera-
3. Press
toadjusttemperaturesettingbelowroomtempera-
ture. The cooling system should stop operating.
ture. The heating system should stop operating.
3
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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, 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.
1
2
WHITE-RODGERS
THE THERMOSTAT BASE
FAN ON
AUTO
COOL OFF HEAT
The Thermostat Buttons and Switches
Other than
and
, the following buttons and switches are
located behind the door on the bottom of the thermostat cover
(see fig. 11). Pull the door down to open it.
3
4
(Red arrow)
(Blue arrow)
Raises temperature setting.
Lowers temperature setting.
1
2
3
4
5
HEAT
6
COOL
FAN switch (ON, AUTO).
BATTERY
SYSTEM switch (COOL, OFF, HEAT).
7
8
6
5
The Display
Figure 11. Thermostat display, buttons, and switches
HEAT is displayed when the SYSTEM switch is in the
5
HEATposition. COOL isdisplayed(non-flashing)whenthe
SYSTEM switch is in the COOL position. COOL is dis-
played (flashing) when the compressor is in lockout mode.
OFF is displayed when the SYSTEM switch is in the OFF
position.
• °F/°C CONVERTIBILITY— After ten seconds of no key
activity, when the thermostat is in the temperature display
adjustment mode, or 30 seconds after power up, pressing
and
atthesametimewillswitchtheLCDtemperature
display between Fahrenheit and Celsius.
Displays current temperature.
6
7
• 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° range) as follows:
BATTERY is displayed when the 3 “AA” batteries are low
and should be replaced. Nothing else will be displayed.
Displays current setpoint temperature (this is blank when
SYSTEM switch is in the OFF position).
8
1. Press
applying power.
2. Press or
and
at the same time within 30 seconds of
OPERATING FEATURES
to adjust the displayed temperature to
Now that you are familiar with the thermostat buttons and
display, read the following information to learn about the fea-
tures of the thermostat.
your desired setting.
3. After setting your desired temperature, do not press any
buttons for ten seconds. The thermostat will continue
operating at the changed temperature setting.
• 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.
SETTING THE THERMOSTAT
This thermostat is very easy to operate. Set the SYSTEM button
• LOW BATTERY INDICATOR — If the 3 “AA” alkaline
batteries are low and should be replaced, the display will be
blank except for the word BATTERY. When the batteries
are low, pressing any button will cause the display to
operate for ten seconds. After ten seconds, the display will
be blank except for the word BATTERY. When the duration
of a low battery condition exceeds four weeks, the setpoint
is altered by 10 degrees to signal that the batteries must be
replaced.
to either HEAT or COOL, then press
or
until the tempera-
ture 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.
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