White Rodgers 1F85-0471 User Manual

The White Rodgers 1F85-0471 is a non-programmable thermostat with automatic heat/cool changeover, suitable for heat pump, multi-stage, and heat only systems. It features electronic accuracy, large LCD with backlight, selectable °F/°C display, and compressor lockout protection. Below are the key specifications, installation, operation, and troubleshooting instructions.

Preparations

Assemble tools required: Standard screwdriver for removing old thermostat base, non-absorbent gloves for handling potential mercury spills from replaced products.

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

Thermostat installation and all components of the control system shall conform to Class II circuits per the NEC code.

WARNING! FAILURE TO READ AND FOLLOW ALL INSTRUCTIONS CAREFULLY BEFORE INSTALLING OR OPERATING THIS CONTROL COULD CAUSE PERSONAL INJURY AND/OR PROPERTY DAMAGE.

ATTENTION: MERCURY NOTICE This product does not contain mercury. However, this product may replace a product that contains mercury. Mercury and products containing mercury must not be discarded in household trash. Do not touch any spilled mercury. Wearing non-absorbent gloves, clean up any spilled mercury and place in a sealed container. For proper disposal of a product containing mercury or a sealed container, refer to www.white-rodgers.com for location to send product containing mercury.

Removing Old Thermostat A standard heat/cool thermostat consists of three basic parts: the cover (snap-on or hinge type), the base (removed by loosening all captive screws), and the switching subbase.

Description

Blue universal thermostat with automatic heat/cool changeover option. Single stage, multi-stage or heat pump. Models covered: 1F85CA-0471, 1F85-0471, 1F83-0471.

Applications:

• Heat Pump (No Aux. or Emergency Heat)
• Heat Pump (with Aux. or Emergency Heat)
• Systems with up to 2 Stages Heat, 2 Stages Cool
• Heat Only Systems (with optional fan switch)
• Millivolt Heat Only Systems – Floor or Wall Furnaces
• Cool Only Systems
• Gas or Oil Heat
• Electric Furnace
• Hydronic (Hot Water) Zone Heat – 2 Wires
• Hydronic (Hot Water) Zone Heat – 3 Wires
• Compressor with Comfort Alert II Module (1F85CA only)

Precautions

Save these instructions for future use. Ensure all wiring conforms to NEC code for Class II circuits. Avoid discarding products containing mercury in household trash; proper disposal via www.white-rodgers.com.

Specifications

• Electrical Rating: Battery Power: mV to 30 VAC, NEC Class II, 50/60 Hz or DC; Input-Hardwire: 20 to 30 VAC; Terminal Load: 1.5 A per terminal, 2.5A maximum all terminals combined
• Setpoint Range: 45° to 90°F (7° to 32°C)
• Differential (Single Stage): Heat 0.6°F; Cool 1.2°F (adjustable)
• Differential (Heat Pump): Heat 1.2°F; Cool 1.2°F (adjustable)
• Operating Ambient: 32° to +105°F (0° to +41°C)
• Operating Humidity: 90% non-condensing max.
• Shipping Temperature Range: -40° to +150°F (-20° to +65°C)
• Dimensions (Thermostat): 4.0"H x 5.11"W x 1.3"D
• Power Indicator: Displays power level of 2 “AA” batteries: full power, half power, low (change batteries).

Installation

Refer to equipment manufacturers’ instructions for specific system wiring information.

Wiring Diagrams

Heat Pump Connections: Configure for heat pump systems (refer to figures not detailed in text; see manual pages 3-6 for diagrams). Systems include: Heat Pump with one/two stage compressor, multi-stage systems (no heat pump), single stage systems.

Operation

Home Screen Description Displays system mode (Heat, Cool, Auto, Off). Shows setpoint temperature. Indicates fan status (On, Auto). Displays battery power level. Shows active protection or fault indicators if applicable.

Operating Features

• Automatic heat/cool changeover.
• Programmable schedules: 5/1/1 Day, 5/2 Day, or Non-Programmable.
• Comfort Alert integration (1F85CA model): Monitors compressor faults via yellow LED codes.
• Battery powered with low battery indicator.
• Adjustable differentials and setpoints.
• Multi-stage support up to 2 heat/2 cool.

Programming

For Programmable Models Only:

1. Enter Heating Program: Press SYSTEM to select “Heat”, press Menu then Schedule. Displays day(s) being programmed.
2. Set periods (Wake, Leave, Return, Sleep) with heat/cool setpoints.
3. Similar for Cooling Program: Select “Cool” mode.
4. Override: Temporary hold by adjusting setpoint.
5. Copy Settings: Between days or programs.

Troubleshooting

Reset Operation Remove wires from R and C terminals (do not short), remove batteries for 2 minutes, reconnect. Display shows all segments on reset. Resets installer menu and programming to factory settings.

Comfort Alert Codes Monitors outdoor systems with Copeland Scroll compressors. Abnormal conditions shown by flashing ALERT codes on yellow LED:

• Code 1: High pressure.
• Code 2: Low pressure.
• Code 3: Compressor sensor.
• Code 4: Drive fault.
• Code 5: Compressor overload.
• Code 6: Loss of charge.
• Code 7: Communication error.

Thermostat reacts by turning compressor off if Active Protection is ON.

General Troubleshooting

• If display blanks or operation erratic: Reset as above.
• Low battery: Replace 2 AA batteries.
• Voltage spike: Reset thermostat.

Factory Settings System Type: Single Stage (SS 1). Differential: Heat 0.6°F (single), 1.2°F (heat pump); Cool 1.2°F. Setpoint Range: 45°-90°F. Programming: Model-dependent (e.g., 5/1/1 Day for 1F85-0471). All configurations reset to defaults on reset.