Quck answer
To hook up the wiring for a Honeywell Thermostat RTH111B, follow these steps:
1. Turn off the power to your heating and cooling system at the circuit breaker.
2. Remove the old thermostat from the wall and disconnect the wires.
3. Identify the wires and their corresponding terminals on the new thermostat.
4. Connect the wires to the corresponding terminals on the new thermostat, ensuring a secure connection.
5. Mount the new thermostat on the wall using the provided screws.
6. Turn the power back on at the circuit breaker and set the desired temperature on the thermostat.
Note: It is important to refer to the installation manual provided with the thermostat for detailed instructions specific to your model.
The Honeywell RTH111 series comprises of programmable thermostats powered by batteries that are suitable for controlling various household heating and cooling arrangements. The Honeywell RTH111B can be used in a two- or three-wire configuration to control a gas, oil or electric furnace or an air conditioning system. It can also be used in a four- or five-wire configuration to control a heating system with air conditioning. However, it is not recommended for controlling a heat pump or a system with second-stage heating or cooling.
If you are replacing your old thermostat, take note of the terminals to which the existing wires are connected and connect the wires to the same terminals on the new thermostat. If this is your first time installing a thermostat, you may need to match the thermostat terminals to those on the system control panel. Although there is a color standard for thermostat wiring, it is best to double-check by looking at the connections on the control panel and take a picture if necessary.
Wiring the RTH111 Thermostat – No Common Wire Required
Although the RTH111 thermostat wiring is less complicated than that of other thermostats, it is advisable to read the installation manual before you begin. This will help you familiarize yourself with the peculiarities of this model. One of the most important things to note is that it does not use a common wire, which is usually blue or black and labeled C, C1 or X because it gets its power from batteries. If your old thermostat used this wire, simply tape off the end and push it out of the way since it is not required.
The Honeywell RTH111 comes with a jumper wire installed between the Rh and Rc terminals. These terminals supply power to the heating and cooling systems respectively. If you have only one power wire (usually red), leave the jumper in place and connect the wire to either Rc or Rh. However, if you have separate Rc and Rh wires, remove the jumper and connect each wire to the appropriate terminal.
Simple Two- or Three-Wire Configuration
If the thermostat is going to control a furnace, you will need at least two wires. One is the power wire labeled R (red), and the other controls the furnace, which should be labeled W (white). Connect these wires to the appropriate terminals. If the system has a separate fan control, you will see a third wire labeled G (green). Connect it to the G terminal and set jumper JP1 on the back of the thermostat to the HE position if the furnace is electric. Leave it in the HG position for a gas or oil furnace.
If the Honeywell thermostat installation is to control an air conditioning system, you will have an R wire for power and a W wire to control the air conditioner. You may also have a Y wire (yellow) to control the compressor motor. Attach this to the Y terminal.
Wiring a Honeywell Thermostat for Heat Pump Systems
Heat pump systems require an additional wire, usually labeled O (orange), for the reversing valve. Connect it to the O/B terminal. If there’s a B wire (blue) that isn’t the common wire, connect it to the O/B terminal and set jumper JP2 to the B position. This ensures proper heating and cooling modes.
When controlling a heat pump, the Y and W terminals are both used, but you may only have one of these wires. In this case, install a jumper wire between the Y and W terminals and attach the wire to the appropriate terminal.
FAQ
1. How do I install a Honeywell Thermostat RTH111B?
To install a Honeywell Thermostat RTH111B, start by turning off the power to your heating and cooling system. Then, remove your old thermostat and label the wires for easy reconnection. Next, mount the thermostat base on the wall and connect the wires according to the labeled terminals. Finally, snap the thermostat onto the base and turn on the power to your system.
2. What are the basic wiring connections for the Honeywell Thermostat RTH111B?
The basic wiring connections for the Honeywell Thermostat RTH111B include the following terminals: R (power), W (heat), and Y (cooling). These terminals are used to connect the corresponding wires from your heating and cooling system. It’s important to refer to the wiring diagram provided in the thermostat’s manual or on the backplate to ensure proper connection.
3. Can I install the Honeywell Thermostat RTH111B myself?
Yes, you can install the Honeywell Thermostat RTH111B yourself if you are comfortable working with electrical wiring. However, if you are unsure or inexperienced, it’s recommended to hire a professional to ensure the installation is done correctly and safely.
4. What should I do if the wiring colors don’t match?
If the wiring colors don’t match between your system and the Honeywell Thermostat RTH111B, you will need to identify the corresponding terminals based on the labels or markings on the wires. You can also refer to the wiring diagram in the thermostat’s manual for guidance. It’s important to ensure that the wires are connected to the correct terminals to avoid any issues with your heating and cooling system.
5. Can I use the Honeywell Thermostat RTH111B with a heat pump system?
No, the Honeywell Thermostat RTH111B is not compatible with heat pump systems. It is designed to work with conventional heating and cooling systems. If you have a heat pump system, you will need to choose a thermostat specifically designed for heat pumps.
6. What is the purpose of the jumper wire on the Honeywell Thermostat RTH111B?
The jumper wire on the Honeywell Thermostat RTH111B is used to connect the R (power) terminal to the Rc (cooling) terminal. This is necessary when you have separate power supplies for heating and cooling systems. If your system has a single power supply, you can remove the jumper wire.
7. Can I program a schedule with the Honeywell Thermostat RTH111B?
No, the Honeywell Thermostat RTH111B does not have programming capabilities. It is a basic thermostat that allows you to manually adjust the temperature settings. If you’re looking for a thermostat with programmable features, you may need to consider a different model.
8. How do I change the batteries in the Honeywell Thermostat RTH111B?
To change the batteries in the Honeywell Thermostat RTH111B, start by removing the thermostat from its base. Then, open the battery compartment and replace the old batteries with new ones. Make sure to observe the correct polarity when inserting the batteries. Finally, reattach the thermostat to its base and verify that it powers on.