Thermostatic controls honeywell rth111 wiring my dad is attempting to replace our old central air thermostat with a honeywell rth111. R rc rh 4 and v.
Honeywell Digital Non Programmable Thermostat
4 wire honeywell thermostat rth111b wiring diagram. If necessary strip the end of each wire maximum of 14 inch. The model number of the honeywell thermostat was not provided however here are the typical wiring assignments for a conventional heating system. The connection of the new thermostat should be similar to that of the old thermostat. Do not use c c1 or x wire. If any wires are not attached to the terminals of your old thermostat you do not need to label them as they will not be connected to your new thermostat. C 24 vac common you might see blue purple or brown typically used for this wire.
The red jumper wire between the rc and rh terminals must be removed in 2 or 5 wire installations. The model he purchased has the following hookups. I show where the wires go at the thermostat the color code then down at the furnace control board and how to wire up the wires coming. This is because its a very basic thermostat designed only to control a heating system. Honeywell thermostat wiring diagram 4 wire examples. If its a new installation you may have to identify the wires first.
Ignore wire colors use only letter designations to identify wire types. When replacing an existing thermostat simply note the terminals to which the wires are attached and attach them to the same terminals. The honeywell rth111b is a programmable version of the honeywell rth111 thermostat series. Set heating fan control non programmable thermostat rth111 set heating fan control set jumper jp1 on the back. If you have a system that both heats and cools your house you need a more complex thermostat with more wire terminals and if your system. This thermostat cannot be used if your old thermostat had any two of the following wires.
The table above provides a more complete list of honeywell thermostat wiring colors and their uses. Wrap bare end of wire with electrical tape. However it can vary depending on the installa tion. But here is a list of the most common wire color mappings as seen in many four wire t stat setups. The jumper must be used in 3 or 4 wire installations if you wish to use the mode selector switch for. If you check the honeywell thermostat ct31a1003 wiring diagram youll see that it requires only two wires.
Keep in mind that there should be a low voltage cable in the wall where the thermostat is located which has individual wires as shown in the instructions below. Do not use b wire if you already have o wire. Basic thermostat wiring for furnace and air conditioner.
Gallery of 4 Wire Honeywell Thermostat Rth111b Wiring Diagram
