Wiring Diagram Old Round Honeywell Thermostat

If labels do not match letters on the thermostat check the chart at.

Wiring diagram old round honeywell thermostat. At left the thermostat wiring diagram illustrates use of a honeywell t87f thermostat in a 3 wire application as a spdt single pole double throw switch such as used to control low voltage motors electric radiator valves zone valves. I am trying to rewire a 5 wire honeywell thermostat. Gas or oil furnace. Note that in our case we had to use the green wire for c as discussed below because there were only four wires coming from.

Use the wiring cross reference table below to match each old thermostat wire with its corresponding terminal on the ct87 wallplate or subbase. The red wire the red wire r rc rh connects the high side of the output of the control transformer to the t stat. This is a round thermostat with a dial on it. Use the wiring cross reference table below to match each old thermostat wire with its corresponding terminal on the ct87 wallplate or subbase.

Install the honeywell lyric thermostat like a pro. Honeywell thermostat rthb wiring diagram. The wiring for your honeywell thermostat depends on the functions of your heating and cooling system. A look at a iconic bit of equipment the classic honeywell round thermostat.

How is a honeywell thermostat wired. 8 13 for wiring diagrams. 8 through 13 wiring diagrams. Ct87a b j roundfi thermostat 69 0274 6 6 wire the thermostat 1.

The wires are blue green white orange and red. In the honeywell t87f thermostat series the single pole double throw switch makes closes one set of contacts when the temperature falls to turn on the heating appliance. You ll probably see a thermostat jumper wire connecting the rc and rh terminals. The blue brown or b lack wires also referred to as the c wire this wire connects the low side of the output of the low voltage power to the t stat.

This electrical wiring question came from. Honeywell thermostat wiring diagram wires. T6 pro wiring diagrams. At left the thermostat wiring diagram illustrates use of a honeywell t87f thermostat in a 2 wire application controlling a gas fired heating appliance.

It s there so you can supply power to the heating and cooling switches with a single wire which is usually red. Pamela a handy woman from brockton massachusetts. Never attach wires to both the b and o terminals. Wiring cross reference connect to connect to connect to wire label ct87a.

Wire the thermostat ct87a b j round thermostat wire the thermostat 1. 4 wire honeywell thermostat wiring diagram a pcb layout is the resulting design from taking a schematic once specific components and determining how they will physically be laid out upon a. Label wires and remove your old thermostat see pages.