White Rodgers 1F89-211 User Manual

Your new White Rodgers Digital Thermostat uses the technology of a solid-state microcomputer to provide precise temperature control. It features simultaneous heat and cool setpoint storage, setpoint storage in case of power loss, pre-set temperature control, LCD continuously displaying setpoint and room temperature, continuous backlit display option, °F/°C convertibility, temperature range 45°F to 90°F, R, C, Y, W2, G, O/B, E, and L terminals for single or two-transformer systems, and optional "AA" batteries for continuous display during AC power loss. Compatible with standard heat pump systems with electric, gas or oil Aux heat (24 VAC HOT and COMMON available), and single-stage heat pump systems with no Aux heat (24 VAC HOT and COMMON available). Requires 2 AA alkaline batteries. Below are the key specifications, installation, operation, and troubleshooting instructions.

Preparations

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: Failure to read and follow all instructions carefully before installing or operating this control could cause personal injury and/or property damage.

• 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. Do not exceed the specification ratings.
• WARNING: All wiring must conform to local and national electrical codes and 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. Rough handling or distorting components could cause 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. Thermostat installation and all components of the system shall conform to Class II (current limited) circuits per the NEC code. Failure to do so could cause a fire hazard.

Specifications

Electrical Data

• Electrical Rating: 20 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)

Applications

• For use with: Standard heat pump systems with electric, gas or oil Aux heat with 24 VAC HOT and COMMON available; Single-stage heat pump systems with no Aux heat with 24 VAC HOT and COMMON available

Do Not Use With

• Millivolt systems
• Systems exceeding 30 VAC and 1.5 amps
• 3-wire zoned hydronic heating 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 149°F

Thermostat Details

The 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.

The Thermostat Buttons and Switches:

1. Up arrow: Raises temperature setting.
2. Down arrow: Lowers temperature setting.
3. SET TIME button.
4. VIEW PRGM (program) button.
5. RUN PRGM (program) button.
6. HOLD TEMP button.
7. FAN switch (ON, AUTO).
8. SYSTEM switch (COOL, OFF, HEAT).

The Display:

• Indicates day of the week.
• Flame icon displayed when the SYSTEM switch is in the HEAT position. Snowflake icon displayed (non-flashing) when the SYSTEM switch is in the COOL position. Snowflake displayed (flashing) when the compressor is in lockout mode.
• Displays “BATT” when the 2 “AA” batteries are low and should be replaced.
• Alternately displays current time and temperature.
• The word “HOLD” is displayed when the thermostat is in the HOLD mode.
• Displays currently programmed set temperature (this is blank when SYSTEM switch is in the OFF position).

Removing Old Thermostat

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 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.

Mounting and Wiring

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.

Wiring Diagrams

NOTE: The following wiring diagrams show typical terminal identification and wiring. For proper installation, refer to the original manufacturer's instructions. * 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. Relay contacts shown are thermostatically operated.

Single Transformer Heat Pump System with Auxiliary Heat

System Type: Standard heat pump with electric, gas, or oil auxiliary heat.

• Key Components and Connections: Transformer provides power to R (24 VAC HOT) and C (COMMON/Neutral). Y terminal: Connected to compressor relay for cooling. W2 terminal: Connected to auxiliary heat (second stage heat). G terminal: Connected to fan relay. O/B terminal: Changeover relay (O/B switch selectable). E terminal: Connected to emergency heat relay (bypasses heat pump). L terminal: Connected to system monitor (e.g., for fault indication).
• Diagram Description: The diagram shows a transformer connected to R and C. From R, lines branch to Y (compressor), W2 (aux heat), G (fan), O/B (changeover), and E (emergency). C connects to the neutral side. A note indicates: "Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency Heat." Symbols include relays for compressor, aux heat, fan, changeover, and emergency. The system monitor is shown connected to L.
• Notes: Changeover See Note. Jumper required to use a single Aux Heat for both Second Stage Heat and Emergency Heat. Compatible with single-stage heat pump with aux heat.

Single Transformer Heat Pump System without Auxiliary Heat

System Type: Single-stage heat pump with no aux heat.

• Key Components and Connections: Similar to the above but without W2 or E connections for aux/emergency heat. Focus on Y (compressor), G (fan), O/B (changeover), R, and C.
• Diagram Description: Simplified version of the above, omitting aux heat branches. Transformer to R and C, with lines to Y, G, O/B. Changeover note remains the same.
• Notes: 24 VAC HOT and COMMON required.

Two-Transformer Systems

System Type: Heat pump systems using separate transformers for heating and cooling (if applicable).

• Key Components and Connections: R terminals may be split (e.g., Rh for heating, Rc for cooling), but content specifies R, C, Y, W2, G, O/B, E, L for single or two-transformer systems. Jumper may be needed between Rh and Rc if single transformer.
• Diagram Description: Adaptation of single transformer diagram with separate HOT wires to R for heat/cool sides, converging at C (common).
• Notes: All wiring must conform to local codes; total load not to exceed 1.5 Amps.

General Wiring Notes:

• Use 18-gauge wire for connections.
• The O/B switch controls changeover: "O" for cool-energized, "B" for heat-energized.
• For emergency heat, EMER bypasses the heat pump to use the heat source wired to terminal E.
• Warning: To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.

1. Connect wires beneath terminal screws on base using appropriate wiring schematic.
2. Place base over hole in wall and mark mounting hole locations on wall using base as a template.
3. Move base out of the way. Drill mounting holes.
4. Fasten base loosely to wall using two mounting screws. Adjust until level, and then tighten screws.
5. Push excess wire into wall and plug hole with a fire-resistant material (such as fiberglass insulation) to prevent drafts from affecting thermostat operation.

Check Operation

NOTE: To prevent static discharge problems, touch side of thermostat to release static build-up before touching any keys. If at any time during testing your system does not operate properly, contact a qualified service person.

Fan Operation

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

1. Turn on the power to the system.
2. Move the FAN switch to ON position. The blower should begin to operate.
3. Move the FAN switch to the AUTO position. The blower should stop immediately.

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 up arrow to adjust the thermostat setting above room temperature. The heating system should begin to operate.
3. Press down arrow to adjust the temperature setting below room temperature. The heating system should stop operating.

Cooling System

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

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.

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

Emergency System

EMER bypasses the Heat Pump to use the heat source wired to terminal E on the thermostat. EMER is typically used when compressor operation is not desired, or you prefer back-up heat only.

1. Set the system switch to EMER.
2. Adjust setpoint above room temperature.
3. Verify emergency heat source activates via terminal E.

Operating Features

• Pre-set temperature control with simultaneous heat and cool setpoint storage.
• LCD continuously displays setpoint and room temperature.
• °F/°C convertibility.
• Continuous Backlit display option (enabled via configuration).
• Optional "AA" batteries for display during AC power loss.
• O/B switch for changeover relay control (O for COOL energization, B for HEAT energization).

Backlight Operation: The thermostat has a continuous backlit display option. To enable or adjust the backlight, refer to the thermostat’s settings or manual for specific instructions.

Configuration Menu

The configuration menu is accessed by pressing specific buttons (e.g., HOLD and UP/DOWN arrows simultaneously, inferred from standard operation). It includes options for system settings, displayed as a sequence of codes and selections on the LCD.

• 10 (Cooling System): Select HP (Heat Pump) or AC (Air Conditioning). HP is for heat pump systems; AC for standard air conditioning.
• 11 (Emergency System): EMER bypasses the Heat Pump to use the heat source wired to terminal E. Used when compressor operation is not desired or back-up heat is preferred.
• 20 (Heating System): Select HP or GAS/ELEC. HP for heat pump; GAS/ELEC for gas/electric auxiliary heat.
• 30 (O/B Terminal): Select O or B. O energizes changeover in COOL; B in HEAT.
• 40 (Aux/Emergency Heat Cycle Rate): Select 1-9 for cycles per hour.
• 50 (Compressor Cycle Rate): Select 1-9 for cycles per hour.
• 60 (Cool Differential): Select .5 to 2.0°F adjustment.
• 70 (Heat Differential): Select .5 to 2.0°F adjustment.
• 80 (Fan Control): Select GAS (for gas systems, fan controlled by furnace) or ELEC (for electric systems, thermostat controls fan).
• Heat Pump Stage Cycle Rate: Select FA (Fast) or SL (Slow). FA for shorter cycles; SL for longer cycles. Factory calibrated, but adjustable.
• Other options: Include backlight enablement and °F/°C selection.

Configuration Steps:

1. Enter configuration mode (specific button sequence not detailed; typically HOLD + arrows).
2. Use UP/DOWN arrows to navigate and select options.
3. Press HOLD to advance to next menu item.
4. Exit by pressing RUN or waiting for timeout.

Note: Your thermostat was accurately calibrated at the factory but you have the option to change the display higher or lower. The FA setting is used to produce shorter heating cycles.

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

Troubleshooting

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 the reset button (see fig. 1).

If the thermostat has power, has been reset and still does not function correctly contact your heating/cooling service person or place of purchase.

Description of Figure/Diagram (Page 6: Troubleshooting): References "fig. 1" showing the location of the reset button on the thermostat circuit board or back panel.

Common Issues (Inferred from Content):

• Erratic operation: Reset via button.
• No display: Check power, batteries, or reset.
• Incorrect operation: Verify wiring, configuration, and O/B switch position.

O/B Switch Operation: The O/B switch on the White Rodgers 1F89-211 thermostat controls the changeover relay for heat pump systems. It is factory set to the "O" position, which energizes the changeover relay in COOL mode, suitable for most heat pump applications. If the thermostat or heat pump requires the relay to be energized in HEAT mode, the switch must be moved to the "B" position.

Note: The provided content is a partial extraction from the manual pages available on the source. Sections such as detailed button operations, full diagrams, and advanced troubleshooting are summarized based on the extracted text. For a complete manual, refer to the full PDF download.