EMERSON-White-Rodgers-1F83H-21PR-Heat Pump-Thermostat-Instruction-Manual-featured

EMERSON White Rodgers 1F83H-21PR Heat Pump Thermostat Instruction Manual


EMERSON White Rodgers 1F83H-21PR Heat Pump Thermostat


EMERSON-White-Rodgers-1F83H-21PR-Heat Pump-Thermostat-Instruction-Manual-product

Operator: Save these instructions for future use!


Your new White-Rodgers Digital Thermostat uses the technology of a solid-state microcomputer to provide precise temperature control.


  •  Simultaneous heat and cool setpoint storage
  • Pre-set temperature control
  • Backlit display
  • LCD continuously displays setpoint and room temperature
  • °F/°C convertibility
  • Temperature range from 45° to 90°F
  • RC, RH, C, W, Y, G, O, and B terminals Optional
  • terminal (Dual Power option)
  • B and O terminals for single-stage heat pumps (no auxiliary heat) or damper operation
  • Setpoint storage in case of power loss
  • 2 “AA” alkaline batteries included

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.

To prevent electrical shock and/or equipment damage, disconnect electric power to the system at the main fuse or circuit breaker box until installation is complete.

Do not use on circuits exceeding specified voltage. Higher voltage will damage control and could cause shock or fire hazards. Do not short out terminals on gas valve or primary control to test. Short or incorrect wiring will damage the 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. Operator: Save these instructions for future use!



  • 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)


  • 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

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


  • Multi-stage systems
  • Systems exceeding 30 VAC and 1.5 amps
  • 3-wire zoned hydronic heating systems



  1. Shut off electricity at the main fuse box until installation is complete. Ensure that the electrical power is disconnected.
  2. Remove the front cover of the old thermostat. With wires still attached, remove the 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 the old thermostat one at a time. DO NOT LET WIRES FALL BACK INTO THE WALL.
  5.  Install a new thermostat using the following procedures.

This product does not contain mercury. However, this product may replace a unit that 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 it into a container that 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. Refer to www.white-rodgers.com for locations to send products containing mercury.

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.


  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 the base using the appropriate wiring schematic (see figs. 2 through 7).
  3. Place base over hole in wall and mark mounting hole locations on the wall using base as a template.
  4. Move the base out of the way. Drill mounting holes.
  5. Fasten the base loosely to wall, as shown in fig. 1, using two mounting screws. Place a level against the bottom of base, adjust until level, and then tighten the screws. (Leveling is for
    appearance only and will not affect thermostat operation.) If you are using existing mounting holes, or if the holes drilled are too large and do not allow you to tighten base snugly,
    use plastic screw anchors to secure sub baseEMERSON-White-Rodgers-1F83H-21PR-Heat Pump-Thermostat-Instruction-Manual-fig-1
  6. Push excess wire into the wall and plug the hole with a fire-resistant material (such as fiberglass insulation) to prevent drafts from affecting thermostat operation.


2 “AA” alkaline 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. If “LO BATTERY” is displayed, the batteries are low and should be replaced. For best results, replace all batteries with new premium brand alkalines batteries such as Duracell® or Energizer®.
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.

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).

If at any time during testing your system does not operate properly, contact a qualified service person. Turn on the power to the system.

Fan Operation
If your system does not have a G terminal connection, skip to Heating System.

  1. Move the FAN switch to the ON position. The blower should begin to operate.
  2. Move the FAN switch to the AUTO position. The blower should stop immediately.EMERSON-White-Rodgers-1F83H-21PR-Heat Pump-Thermostat-Instruction-Manual-fig-2

RED jumper wire (provided with thermostat) must be connected between thermostat RH and RC terminals for proper thermostat operation with this system.

EMERSON-White-Rodgers-1F83H-21PR-Heat Pump-Thermostat-Instruction-Manual-fig-3

The 24 Volt neutral connection to terminal C on the thermostat is not required if the batteries are replaced once a year with fresh premium brand alkaline batteries.

Heating System

  1. Move the SYSTEM switch to the HEAT position. If the heating system has a standing pilot, be sure to light it.
  2.  Press EMERSON-White-Rodgers-1F83H-21PR-Heat Pump-Thermostat-Instruction-Manual-fig-4to adjust the thermostat setting above room temperature. The heating system should begin to operate.
  3. Press EMERSON-White-Rodgers-1F83H-21PR-Heat Pump-Thermostat-Instruction-Manual-fig-4to adjust the temperature setting below room temperature. The heating system should stop operating.

To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.

  1. Move the SYSTEM switch to the COOL position.
  2. Press to adjust the thermostat setting below room temperature. The blower should come on immediately on high speed, followed by cold air circulation.
  3. Press to adjust the temperature setting above room temperature. The cooling system should stop operating.


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.

The Thermostat Buttons and Switches (see fig. 8)

EMERSON-White-Rodgers-1F83H-21PR-Heat Pump-Thermostat-Instruction-Manual-fig-6

  1. Raises temperature setting.
  2. Lowers temperature setting.
  3. FAN switch (ON, AUTO).
  4. SYSTEM switch (COOL, OFF, HEAT). The Display
  5. The 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.
  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 the 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.


The configuration menu allows you to set certain thermostat operating characteristics to your system or personal requirements. Move the 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. The configuration menu chart below summarizes the configuration
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.

Configuration Menu


EMERSON-White-Rodgers-1F83H-21PR-Heat Pump-Thermostat-Instruction-Manual-fig-7


  1. 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 normal
    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. Select Display Backlight (d-L OFF or ON) – The display backlight improves display contrast in low-lighting conditions. Selecting the 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.
  2. 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.
  3. 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.
  4. 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.
  5. Select Temperature Display (°F or °C) – Changes the display readout to Celsius or Fahrenheit as required.


Now that you are familiar with the thermostat buttons and display, read the following information to learn about the many features of the thermostat.

    •  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.

This thermostat is very easy to operate. Set the SYSTEM
switch to either HEAT or COOL then press 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 the SYSTEM switch position.


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
The reset operation is listed below.

No Cooling
Same procedure as heating except set the 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 thermostat by pressing and moving 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 purchase. White-Rodgers is a division of Emerson Electric Co. The Emerson logo is a trademark and service mark of Emerson Electric Co.www.white-rodgers.com www.emersonclimate.com


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EMERSON White Rodgers 1F83H-21PR Heat Pump Thermostat Instruction Manual

EMERSON White Rodgers 1F83H-21PR Heat Pump Thermostat Instruction Manual


EMERSON White Rodgers 1F83H-21PR Heat Pump Thermostat Instruction Manual





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