White Rodgers 1F87-51 User Manual
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 7-Day Digital Thermostat uses the
technology 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.
Features:
• Battery powered (3 “AA” Energizer® alkaline batteries included).
• Separate program for each day of the week
• Simultaneous heat and cool program storage
• Preprogrammed temperature control
• Four separate time/temperature settings per 24-hour
period
1F87-51
Programmable Electronic Digital Thermostat
INSTALLATION AND
OPERATION INSTRUCTIONS
DESCRIPTION
• LCD continuously displays set point, and alternately displays time and room temperature
• Temperature override until next program period
• Manual program override (HOLD temperature)
• User may select either 12- or 24-hour clock display
• °F/°C convertibility
• Temperature range 45° to 90°F
• Standard five terminals for single or two-transformer
systems
• B and O terminals for single stage heat pumps or damper
operation
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.
ELECTRICAL DATA
Electrical Rating:
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)
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:
-40°F to 150°F
PRECAUTIONS
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.
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.
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
• 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. 37-5323E
Replaces 37-5323D
0004
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.
ELECTRIC HEAT OR SINGLE-STAGE
HEAT PUMP SYSTEMS
Read entire paragraph before setting electric heat switch. If you
are unsure of your application, contact a qualified serviceperson.
If you have a single-stage heat pump system, OR your system
uses central electric heat, where the blower is energized by a
separate circuit through the fan relay (meaning that the fan
turns on immediately on call for heat), then the switch on the
back of the thermostat base must be moved to the “ELECTRIC”
position (see fig 1). If the thermostat is energizing electric heat
sequencers, the switch MUST remain in the “GAS” position.
If you must move the switch to the “ELECTRIC” position (to the
left), use a small screwdriver or pencil.
ELECTRIC GAS
Electric/Gas switch
Figure 1. Back of thermostat base
Alkaline batteries (3 "AA"–
install "+" ends to the left)
Screw anchors
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. 3 through 10).
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. 2, 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. Push excess wire into wall and plug hole with a fire-resistant
material (such as fiberglass insulation) to prevent drafts from
affecting thermostat operation.
BATTERY LOCATION
This thermostat requires 3 “AA” alkaline batteries to operate.
Batteries are installed 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 the word 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. 2). The batteries must be installed with the positive
(+) ends to the left.
RH
W
RC
G
Mounting
holes
B
O
Y
Figure 2. Thermostat base
HYDRONIC (HOT WATER OR STEAM)
HEATING SYSTEMS
This thermostat is set to operate properly if you have a forcedair 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. While in the
HEAT mode, change the setting by pressing SET TIME/SET
TEMP and VIEW PRGM buttons at the same time until the
correct setting is displayed (A for forced air; H for hydronic
systems). If there is a loss of battery power, or when you change
batteries, you must repeat this operation once battery power is
restored.
2
Y
G W
RCOB
THERMOSTAT
RH
SYSTEM
Heating
System
24 VAC Transformer
or
Thermopile
Figure 3. Typical wiring diagram for heating only,
2-wire, single transformer systems or millivolt systems
OB
NOTE
RED jumper wire (provided
with thermostat) must be
connected between thermostat's RH and RC terminals
for proper thermostat operation with this system.
Figure 7. Typical wiring diagram for
heat/cool, 4-wire, single transformer systems
Y
Cooling
System
G W
Fan
Relay
Heating
System
JUMPER
WIRE
RC
24 VAC
THERMOSTAT
RH
SYSTEM
TRANSFORMER
Hot
120 VAC
Neutral
Thermostat
RW
NOTE
Jumper wire must be
added between R and B
terminals on the primary
control (jumper wire not
provided with thermostat).
Add jumper wire
(not provided with thermostat)
Figure 4. Typical wiring diagram for
3-wire SERIES 10 heating systems
Y
Y
OB
NOTE
RED jumper wire (provided
with thermostat) must be
connected between thermostat's RH and RC terminals
for proper thermostat operation with this system.
G W
Fan
Relay
Heating
System
RC
Figure 5. Typical wiring diagram for
heat only, 3-wire, single transformer systems
3-wire Series 10
Primary Control
(located at furnace)
B
W
R
Furnace
JUMPER
WIRE
THERMOSTAT
RH
24 VAC
TRANSFORMER
SYSTEM
Hot
120 VAC
Neutral
OB
Y
Cooling
System
G W
Fan
Relay
RC
Heating
System
THERMOSTAT
RH
24 VAC
HEATING TRANSFORMER
24 VAC
COOLING TRANSFORMER
Figure 8. Typical wiring diagram for
heat/cool, 5-wire, two-transformer systems
JUMPER
WIRE
Y
Reversing
* Reversing valve is energized when the
system switch is in the COOL position
Valve*
Compressor
Contactor
G W
Fan
Relay
JUMPER
WIRE
RH
RCOB
24 VAC
THERMOSTAT
TRANSFORMER
Figure 9. Typical wiring diagram for
heat pump with cool active reversing valve
SYSTEM
Hot
120 VAC
Neutral
Hot
120 VAC
Neutral
SYSTEM
Hot
120 VAC
Neutral
Y
Cooling
System
G W
Fan
Relay
RCOB
THERMOSTAT
RH
24 VAC
TRANSFORMER
SYSTEM
Hot
120 VAC
Neutral
Figure 6. Typical wiring diagram for
cool only, 3-wire, single transformer systems
CHECK THERMOSTAT OPERATION
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
to operate.
3. Move FAN switch to AUTO position. The blower should stop
immediately.
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 10. Typical wiring diagram for
heat pump with heat active reversing valve
Heating 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 temperature. The heating system should begin to operate.
3. Press to adjust temperature setting below room temperature. The heating system should stop operating.
3
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