Quick Answer: Why Is There A Jumper Between R And RC?

Is r the same as Rh?

R , Rh , and Rc are all the same, but not.

In general terms, the R terminal is where you connect the signal voltage source.

This allows current to flow from “into” the R terminal and “out of” the appropriate signal terminal ( W , Y , etc.).

What does W mean on a thermostat?

heat loadW=the heat load. On a call for heating the thermostat closes a switch between R and W, sending 24v to energize the heating circuit. Y= the cool load. On a call for cooling the thermostat closes a switch between R and Y, sending 24v to energize the cooling circuit. G= the fan load.

What are the 5 thermostat wires?

Here is the industry standard thermostat wire color code used for most systems:White. The white wire connects to your heat.Yellow. The yellow wire connects to your compressor.Green. The green wire connects to the fan.Orange. This wire connects to your heat pump (if applicable).Red (C). … Red (H). … Blue.

Do I need a jumper from R to RC?

If your system has both heating and cooling functions, you’ll need to connect both the Rc and Rh terminals with a red wire. Because many thermostats come with a pre-installed thermostat jumper wire that connects these terminals, you only need one red wire, which could be the thermostat Rc wire or the Rh wire.

What is R and RC on thermostat?

R – 24vac (Heating transformer) Rc – 24vac (Cooling transformer) *Trade model thermostats are required to operate “dual-fuel” systems (systems that use a heat pump for the first 1 or 2 stages of heating and use a gas or oil furnace for backup / emergency heating).

Does R go to RC or RH?

An R wire can go into a Nest Learning Thermostat’s Rc or Rh connector. … These are not jumper wires, and you can insert the Rc wire into the Rc connector and the Rh wire into the Rh connector.

Should RC and RH be connected?

The RC wire (C for Cooling), if connected properly, controls your HVAC cooling. The RH wire (H for Heating) provides power to your HVAC heating. If you are planning to replace your home thermostat, it will be essential that you know which wires to connect to the right terminals in your thermostat.

What if there is no C wire for thermostat?

If your current thermostat didn’t need a C-wire, it (or a wire that can be used as a C-wire) might be rolled up inside the wall.

Is RC the same as C wire?

Though it is a common notion, it may be incorrect to state that the C-wire powers the thermostat. Typically, the wires that give the power supply (usually termed as the ‘hot’ wires) are marked Rc (for cooling) and Rh (for heating). … ‘ If your system has a common wire, it will be marked ‘C’ at most times.

What is a jumper wire on a thermostat?

A thermostat jumper wire is a short piece of wire connecting two terminals on the thermostat base. A jumper wire does not originate from behind the wall, but is unique to each thermostat. Sensi thermostat does not use jumper wires.

What is RC on Nest thermostat?

Rh stands for Red-Heat and Rc stands for Red-Cool. If you only have a single red wire the jumper between Rh and Rc are required for some heating and cooling hybrid systems depending on your thermostat. Yellow/Y is the AC compressor. White/W is the Heating element.

What is an Rh wire?

The Rh wire, another type of red wire, is also responsible for 24-hour volt power from your transformer. The Rh wire connects to your heating system as opposed to your cooling system. … The Rh wire connects to the RH terminal on your thermostat.