This low-voltage thermostat is designed to provide convenient control of the heating/cooling system. To provide greater room comfort, the sensitive spiral bimetal is combined with an adjustable heating anticipator and a fixed cooling anticipator to provide maximum comfort.
If in doubt about whether your wiring is millivolt, line, or low voltage, have it inspected by a qualified heating and air conditioning contractor, electrician, or someone familiar with basic electricity and wiring.
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.
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 short out terminals on gas valve or primary control to test. Short or incorrect wiring will burn out heat anticipator and could cause personal injury and/or property damage.
WARNING
Do not use on circuits exceeding 30 volts. Higher voltage will damage control and could cause shock or fire hazard
Thermostat installation and all components of the system shall conform to Class II circuits per the NEC code.
ELECTRICAL DATA
THERMAL DATA
APPLICATIONS
The 1F56W-911 is designed for use with
SELECT THERMOSTAT LOCATION
Proper location insures that the thermostat will provide a comfortable home temperature. Observe the following general rules when selecting a location:
ROUTE WIRES TO LOCATION
NOTE
All wiring must conform with local and national electrical codes and ordinances.
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.
SPECIAL SYSTEM CONFIGURATIONS
Electric Heat Furnaces (Single Transformer Systems Only)
The subbase as shipped may not operate the fan correctly. If both the heating and cooling system must operate the fan relay, remove the yellow factory-installed jumper wire from the Y terminal and connect it to the A terminal. The fan should now cycle when the thermostat calls for either heat or cool.
Two-Transformer Systems
CAUTION
If two transformers are used, they MUST be in phase. Failure to do so may result in personal injury and/or property damage.
NOTE
Wire color DOES NOT indicate polarity. Polarity is obtained from an oscilloscope or voltmeter.
Heat Pump Applications
This subbase WILL NOT provide multi-stage heating or cooling operation. For single-stage heat pump applications, install a short jumper wire across terminals W and Y. If the old thermostat has a terminal that is continuously energized, disconnect the wire from the old thermostat’s terminal and connect it either to the: 1) B terminal, if the reversing valve is energized on a call for heat; or to the 2) O terminal, if the reversing valve is energized on a call for cool. If the system heats on a call for cool, or vice versa, this wire has been connected to the wrong terminal. RH and RC must be jumpered for single transformer heat pump systems.
Special Application Terminals
The B and O terminals can provide switching for special functions other than heat pump operation. When the system switch is in the HEAT position, the B terminal is energized. When the system switch is in the COOL position, the O terminal is energized.
ATTACH THERMOSTAT TO SUB BASE
CAUTION
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.
NOTE
These typical wiring diagrams show only the terminal identification and wiring hookup. Always refer to wiring instructions, provided by equipment manufacturer, for system hookup operation.
This thermostat is easy to operate. Fig. 8 shows how the heating/cooling system and fan operate when the switches are in various positions. Use the system switch to select either heating or cooling, or to turn the heating/cooling system off. Use the fan switch to control fan operation. When the fan switch is in the AUTO position, the fan will cycle with the heating or cooling system (the fan will not run if the system switch is in the OFF position and the fan switch is in the AUTO position). When the fan switch is in the ON position, the fan will run continuously, regardless of the system switch position (even if the system switch is set to OFF, the fan will run if the fan switch is in the ON position).
CAUTION
The adjustable heat anticipator WILL BURN OUT if 25 VAC is applied directly to the thermostat by shorting out the primary control during testing. This may cause personal injury and/or property damage.
This thermostat is equipped with an adjustable heat anticipator and was preset at the factory to provide satisfactory operation of the heating system under normal conditions. If additional adjustments are necessary, they may be made as follows (see fig. 9):
CALIBRATING THERMOSTAT
This thermostat has been carefully adjusted at the factory and should not require recalibration.
Due to environmental conditions, during normal operation there may be a few degrees of difference between the indicator setting of the thermostat and actual room temperature. If the disagreement is appreciable, however, first make sure that the thermostat is properly located and leveled. Then, if recalibration still seems necessary, proceed as follows:
CAUTION
To prevent electrical shock and/or equipment damage, disconnect electrical power to the system until recalibration is complete.
If you need further information about this product, write to us at: WHITE-RODGERS DIVISION
Emerson Electric Co. 9797 Reavis Road St. Louis, MO 63123-5398
Attn: Technical Service Department
Download Manual
EMERSON 1F56W-911 Programmable Thermostat INSTALLATION Manual
EMERSON 1F56W-911 Programmable Thermostat INSTALLATION Manual
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