The White Rodgers 1F85RF-270 is a 5-1-1 Programmable/Non-programmable, Auto Changeover, Multi-Stage/Heat Pump Thermostat with wireless remote sensor kit. It supports heating and air conditioning systems including heat pumps (with or without auxiliary/emergency heat), standard heat and cooling, two-stage heat and two-stage cool, standard heat only, millivolt heat only (floor or wall furnaces), standard central air conditioning, gas or oil heat, electric furnace, and hydronic (hot water) zone heat (2 wires). Part No. 37-6841E. Save instructions for future use. Failure to read and follow instructions may cause personal injury and/or property damage.
Assemble tools: hand or power drill with 3/16 inch drill bit (if needed), flat blade screwdriver, wire cutter/stripper, level. Shut off electricity at main fuse box until installation complete. Label wires before disconnecting. This thermostat is for 24V systems only; not for millivolt or line voltage. Install away from drafts, direct sunlight, or heat sources for accurate sensing.
Removing Old Thermostat A standard heat/cool thermostat consists of three basic parts: 1. The cover, which may be either a snap-on or hinge type. 2. The base, which is removed by loosening all captive screws. 3. The switching subbase, which is removed by unscrewing the mounting screws that hold it on the wall or adapter plate. Before removing wires from old thermostat, label each wire with the terminal designation from which it was attached. Disconnect the wires from the old thermostat one at a time. Do not let wires fall back into the wall.
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.
The thermostat is configured from the factory for heat/cool, fossil fuel (gas, oil, etc.), forced air systems without thermostat fan control on heat call. For electric heat or heat pumps requiring fan on heat call, switch ELEC/GAS switch on back to ELEC position. For heat pumps, fan powers on heat call in HEAT mode. Set ELEC/GAS switch to match auxiliary heat type for EMER mode.
Figure 1 – Thermostat Base Mounting Hole, Elec-Gas Switch (AUTO ON, ELEC, GAS), Terminals: C O B L W2 G Y2 R E/W1 Y1.
WARNING! Failure to read and follow all instructions carefully before installing or operating this control could cause personal injury and/or property damage. Save these instructions.
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. Thermostat installation and all components of the system shall conform to Class II circuits per the NEC code.
Take care when securing and routing wires so they do not short to adjacent terminals or rear of thermostat. Personal injury and/or property damage may occur.
To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.
To prevent static discharge problems, touch side of thermostat to release static build-up before touching any keys.
A standard heat/cool thermostat consists of three basic parts: 1. The cover, which may be either a snap-on or hinge type. 2. The base, which is removed by loosening all captive screws. 3. The switching subbase, which is removed by unscrewing the mounting screws that hold it on the wall or adaptor plate. Before removing wires from old thermostat, label each wire with the terminal designation from which it was attached. Disconnect the wires from the old thermostat one at a time. Do not let wires fall back into the wall.
Remove packing from thermostat; gently pull cover off base. Set O/B switch to "O" (default) or "B" as needed. For slow cycle, clip W905; for Celsius, clip W904. Connect wires per diagrams. Place base over wall hole, mark/drill mounting holes, secure with screws (level for appearance). Push excess wire into wall, seal hole with fire-resistant material. Snap cover on.
Batteries: 2 AA alkaline (replace every 2 years; low battery shows "BATT"). Insert positive (+) to right. For unoccupied homes >3 months, replace if icon displayed. Offset occurs when <2 months life remains (±10°F); reset manually.
Figure 2 – Typical wiring diagram for single transformer heat pump systems SYSTEM SWITCH, MONITOR, TRANSFORMER (Class II Current Limited).
Figure 3 – Typical wiring diagram for two transformer heat pump systems with NO safety circuits TWO COMMONS MUST BE JUMPERED TOGETHER!, Reversing Valve, 2nd Stage, Compressor, etc.
Figure 4 – Typical wiring diagram for two transformer heat pump systems with safety circuits in BOTH systems TWO COMMONS MUST BE JUMPERED TOGETHER!, Heat Pump Transformer (Class II Current Limited).
Figure 5 – Typical wiring diagram for single transformer multi-stage systems 24 V_(class ii, Current Limited).
Heat Pump Terminal Outputs
| SYSTEM | Heat Pump 1 | Heat Pump 2 |
|---|---|---|
| L | Malfunction Light | Malfunction Light |
| C | 24 Volt (Common) | 24 Volt (Common) |
| R | 24 Volt (Hot) | 24 Volt (Hot) |
| THERMOSTAT TERMINALS (HEAT PUMP) | ||
| W2 | HP 1 and Emergency 2nd stage | HP2 3rd stage |
| HP1 | 1st stage | |
| Y2 | 2nd stage compressor | |
| Y1 | 1st stage compressor | No Heat and Cool mode 1st stage |
| G | Blower/Fan Energized on call for Heat and Cool | |
| O/B | Set GAS/ELEC switch for Emergency mode | Energized in Heat OFF Emergency mode |
| O | Energized in Cool Mode |
*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.*
Multi-Stage Terminal Outputs
| SYSTEM | Multi-stage |
|---|---|
| L | Malfunction Light |
| C | 24 Volt (Common) |
| R | 24 Volt (Hot) |
| THERMOSTAT TERMINALS (MULTI-STAGE) | |
| W2 | Heat Mode 2nd stage |
| E/W1 | Emergency Mode 1st stage |
| Y2 | Cool Mode 2nd stage |
| Y1 | Cool Mode 1st stage |
| G | Blower/Fan Energized on call for Cool (and Heat if configured to Electric Heat) |
| O | Energized in Cool Mode |
| B | Energized in Heat, Off Emergency Modes |
*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.*
To prevent static discharge problems, touch side of thermostat to release static build-up before touching any keys. Do not allow the compressor to run unless the compressor oil heaters have been operational for 6 hours and the system has not been operational for at least 5 minutes.
CAUTION! If at any time during testing your system does not operate properly, contact a qualified serviceperson.
If your system does not have a G terminal connection, skip to Heating 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.
To prevent compressor and/or property damage, if the outdoor temperature is below 50°F, DO NOT operate the cooling system.
The Thermostat Buttons and Switches
The Display
For Programmable Models Only:
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:
Thermostat reacts by turning compressor off if Active Protection is ON.
General Troubleshooting
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 1F85RF-270). All configurations reset to defaults on reset.