White-Rodgers Thermostat Installation Instructions
Models Covered:
- Horizontal Snap-Action: 1D56-310, -347
- Snap-Action: 1D56W-347
- Vertical Sealed Mercury Cell: 1E56-301, -444
- Sealed Mercury Cell: 1E56W-444
- Horizontal: 1F56-301
- Sealed Mercury Cell: 1F56-306, -444
- Sealed Mercury Cell: 1F56W-444
Your Thermostat Replaces Systems For:
| Standard Heating & Cooling Systems - 4 or 5 wires | All Models |
| Standard Heat Only Systems | |
| Standard Central Air Conditioning | |
| Gas or Oil Heat | |
| Hydronic (Hot Water) Zone Heat - 2 wires | |
| Electric Furnace | |
| Heat Pump (No Aux or Emergency Heat) | 1D56-347, 1D56W-347, 1E56-444, 1E56W-444, 1F56-306, -444, 1F56W-444 |
| Baseboard Electric Heating or Line Voltage (120 or 240 Volt) | |
| Millivolt Heat Only Systems - Floor or Wall Furnaces | |
| Hydronic (Hot Water) Zone Heat - 3 wires |
1) PREPARATIONS
Assemble tools required: power drill, flat blade screwdriver, wire cutter/stripper, level.
Caution: Failure to follow and read all instructions carefully before installing or operating this control could cause personal injury and/or property damage.
2 THERMOSTAT FEATURES
Refer to Figure 1 for the Thermostat subbase layout.
Key Components:
- System Switch: Selects HEAT, COOL, or OFF.
- Fan Switch: Selects AUTO (fan operates with system) or ON (fan runs continuously).
- Terminals: Labeled for wire connections (e.g., RH, RC, G, W, Y, O, B, A).
- Mounting Screws: For securing the subbase to the wall.
- Wire Management Area: Keep this area clear of wires.
- Hole in Wall: For routing wires.
Note: O, B, A terminals are not available on models 1D56-310, 1E56-301, 1F56-301, -306.
3 REMOVING OLD THERMOSTAT
Caution: To prevent electrical shock and/or equipment damage, disconnect electrical power to the system at the main fuse or circuit breaker until installation is complete.
Before removing wires from the old thermostat's switching subbase, label each wire with the terminal designation it was removed from.
- Remove Old Thermostat: A standard heat/cool thermostat typically has three parts: the cover, the base, and the switching subbase. Remove the cover, then loosen captive screws to remove the base. Unscrew mounting screws to detach the subbase from the wall or adaptor plate.
- Note Anticipator Setting: Record the anticipator setting from the old thermostat for future reference (Step 5). The heat anticipator pointer, if adjustable, indicates the current rating of the furnace's primary control (e.g., 0.2, 0.4, 0.8).
If no heat anticipator is visible, proceed to the next step.
Mercury Handling Advisory: This product may or may not contain mercury. If replacing a unit containing mercury, do not open mercury cells. If a cell is damaged, avoid contact with spilled mercury. Use non-absorbent gloves to collect spilled mercury and place it in a sealable container. Discard damaged units properly. Mercury should not be disposed of in household trash. Return units containing mercury to White-Rodgers at 2895 Harrison St., Batesville, AR 72501 for proper disposal.
4 MOUNTING AND WIRING
Warning: Do not use on circuits exceeding specified voltage. Higher voltage can damage the control and pose a shock or fire hazard. Do not short terminals on gas valves or primary controls for testing, as this can damage the thermostat and cause injury or property damage. Thermostat installation must comply with Class II circuits per NEC code.
- Remove Base from Subbase: Loosen the screws on the thermostat base and remove it from the subbase.
- Mount Switching Subbase: Use the provided screws to mount the subbase and optional adaptor plate to the wall, as shown in Figure 1.
- Attach Wires to Terminals:
- Two-Wire Systems (Heat Only or Cool Only): For Heat Only, connect one wire to RH and one to W. For Cool Only, connect one wire to RC and one to Y. Keep the factory-installed jumper between RC and RH attached. Tighten all unused terminals securely.
- More Than Two Wires: Use the cross-reference chart for correct connections. For four-wire heat/cool systems, leave the factory-installed jumper between RC and RH attached (see Figure 2). For five-wire systems, remove the factory-installed jumper between RC and RH (see Figure 3).
- Electric Heat or Single-Stage Heat Pump Systems: Model 1F56-306 energizes the fan on a call for heat. Other thermostats are factory-configured for fossil fuel forced-air systems. If your electric heat or heat-pump system requires the thermostat to control the fan on a call for heat, move the yellow factory-installed jumper wire from the Y terminal to the A terminal. This ensures the fan energizes immediately. Consult a qualified HVAC professional if unsure. For single-stage heat pump applications without auxiliary heat, install a jumper wire (not included) across terminals W and Y. If the system's reversing valve is energized in Cooling, connect it to O. If energized in Heating, connect it to B (see Figure 4). This thermostat does not support multi-stage heating or cooling.
- Mount Thermostat Base: Gently push excess wire back into the wall opening. Seal the opening with a fire-resistant material (like fiberglass insulation) to prevent drafts. Mount the thermostat base to the subbase using the three captive screws. Tighten securely. Remove any paper tag from the plastic contact cover.
Caution: Route wires carefully to prevent them from shorting to adjacent terminals or the rear of the thermostat. Improper wiring can cause personal injury or property damage.
TERMINAL CROSS REFERENCE CHART
| New Thermostat Terminal Designation | Other Manufacturers' Terminal Designation |
|---|---|
| RH | RH, 4, RH, M, R |
| RC | R, R, V, R |
| G | G, G, G, F, G |
| W | W, W, W, H, 4 |
| Y | Y, Y, Y, C, Y6 |
* Applies to four-wire, single-transformer systems. The factory-installed jumper wire between RH and RC must remain in place.
White-Rodgers is a division of Emerson Electric Co. Visit www.white-rodgers.com.
5 SET HEAT ANTICIPATOR
Set the anticipator to match the setting noted from your old thermostat or the current rating stamped on your main heating control. The heat anticipator is adjustable from 0.15 to 1.2 amps.
Adjust the anticipator by rotating the contact arm (see Figure 5). The setting is indicated by the numbers on the base where the pointer is positioned. If unsure, contact the heater manufacturer for a recommended setting.
- Move the pointer counterclockwise to lengthen heating system cycles.
- Move the pointer clockwise to shorten heating cycles.
- Make adjustments in increments of no more than 1/2 marking at a time.
Snap on Cover: Carefully align the cover with the base and snap it into place.
6 NEW THERMOSTAT OPERATION
After power is restored, use the System switch to select heating, cooling, or OFF. Use the Fan switch to control fan operation:
- AUTO: The fan cycles with the heating or cooling system. It will not run if the System switch is OFF.
- ON: The fan runs continuously, regardless of the System switch position.
7 SPECIFICATIONS
ELECTRICAL DATA
- Switch Rating: 24 VAC (30 VAC max.)
- Heating: 0.15 to 1.2 Amps
- Cooling: 0 to 1.5 Amps
- Anticipator Rating (Heating): Adjustable from 0.15 to 1.2 Amps
- Anticipator Rating (Cooling): Fixed
THERMAL DATA
- Temperature Range: 50°F to 90°F (10°C to 32°C)
- Operating Humidity Range: 0-90% non-condensing
8 TROUBLESHOOTING
| Symptom | Possible Cause | Corrective Action |
|---|---|---|
| No Heat/No Cool/No Fan (common problems) | 1. Blown fuse or tripped circuit breaker. 2. Furnace power switch OFF. 3. Furnace blower compartment door/panel loose or not installed properly. |
Replace fuse or reset breaker. Turn switch ON. Replace door panel correctly to engage safety interlock/door switch. |
| No Heat | 1. Pilot light not lit. 2. Broken or melted anticipator wire. 3. Loose connection to thermostat or system. 4. Thermostat or heating system requires replacement/service. 5. System Switch not set to Heat. |
Re-light pilot. Excessive current or dead short. Have a qualified service person check the system before replacing the thermostat. Verify thermostat and system wires are securely attached. Consult furnace manufacturer or service person for testing. If system operates but no heat persists, replace thermostat. Set System Switch to Heat and raise temperature above room temperature. |
| Intermittent Heat | 1. Furnace Lock-Out Condition. | Furnaces often have safety devices that shut down the system. If heat works intermittently, contact the furnace manufacturer or a local service person. |
| No Cool | 1. Loose connection to thermostat or system. 2. Thermostat or cooling system requires replacement/service. 3. System Switch not set to Cool. |
Verify thermostat and system wires are securely attached. Consult cooling system manufacturer or service person for testing. If system operates but no cool persists, replace thermostat. Set System Switch to Cool and lower temperature below room temperature. |
| Heat, Cool or Fan Runs Constantly | 1. Possible short in wiring. 2. Possible short in thermostat. 3. Possible short in heat/cool/fan system. |
Check each wire connection at the thermostat. Ensure wires are neatly looped under terminals with no excess wire extending. |
| Furnace Cycles Too Fast or Too Slow (Narrow or wide temperature swing) | See Step 5, Adjusting the Anticipator. | The anticipator setting is the only adjustment affecting heating cycle rate. If an acceptable rate is not achieved, contact a local service person. Thermostat location, system size, and current draw can influence cycle rate. |
| Cooling Cycles Too Fast or Too Slow (narrow or wide temperature swing) | 1. Poor thermostat location for sensing room temperature. 2. Cooling system over or undersized. 3. Excessive current draw influencing thermostat. |
Cooling cycle rate cannot be adjusted. Thermostat location, system size, and current draw can influence cycle rate. Contact a local service person for suggestions. |
| Thermostat Setting and Thermostat Thermometer Disagree | 1. Thermostat thermometer setting requires adjustment. 2. Thermostat setting lever requires calibration. |
The thermometer can be adjusted using a standard slotted screwdriver. Turn the thermometer pointer screw inside the front cover. For setting lever calibration, contact a local heating and cooling service person. |
| Adjusting Thermometer | 1. Thermostat thermometer disagrees with other room thermometers. | The factory-calibrated thermometer can be adjusted. Use a standard slotted screwdriver to turn the thermometer pointer screw located inside the front cover to change the setting. |
The Emerson logo is a trademark and service mark of Emerson Electric Co.
