Table of Contents
RC: The RC terminal is the 24-volt cooling power supply. RH: The RH terminal is the 24-volt heating power supply. When the thermostat calls for heat, a signal is sent to power up the furnace and the blower fan or the boiler, heating your home.
Do I use RH or RC on thermostat?
RH is for the heating unit and RC is for the A/C unit. There will usually be two thermostat cables – don’t mix them up. If the air conditioning thermostat has one transformer to power both the heating and cooling system, then the wire from the transformer goes directly to the RC terminal and is called the RC wire.
Should RC and RH be connected?
If you have both an Rh (Red-heat for powering the heating) and an Rc (Red-cool for powering the cooling), then the R wire can be connected to either Rh or Rc. If you only have a single R wire, then it will only have an R connector, which is the connection you’ll use.
Does RH go to R or RC?
If you have two wires, R or RH will go into the R terminal, and RC will go into the RC terminal.
What is the RH and RC wire on a 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. Green/G runs the fan.
Is Rh the same as R on thermostat?
R , Rh , and Rc are all the same, but not. In general terms, the R terminal is where you connect the signal voltage source. In low voltage controlled systems, there will be a step down transformer that provides the power to the control circuitry.
Why is there a jumper between RC and RH?
Effectively there isn’t a second RH wire, although there is an RH terminal. However, the heating still needs to be controlled, so a wire known as a jumper is connected between the RC and the RH terminals so that power gets to the heating control part of the thermostat.
Do I need a jumper from R to RC?
If you have a wire in the R terminal, and no wire in the RC terminal, use the jumper selector switch, the jumper plug, or a small jumper wire to connect the R and Rc terminals. If you have a wire in the R terminal, and another wire (not a jumper) in the RC terminal, you will not need to connect the R and RC terminals.
Do I need a jumper on my thermostat?
If your HVAC 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 white wire on thermostat?
The white wire underneath your thermostat connects to your heating system. It terminates at your air handler or furnace. The white wire connects to terminal W in industry-standard thermostats.
Where does RC and RH wire go on nest?
Use the wiring diagram you got from the compatibility checker in step 4 to connect your system wires to the Nest Thermostat. Note: If you have an R, Rc or Rh wire, you can put it into the R connector on the Nest Thermostat. If you have a W2, Y2 or O/B wire, you can put it into the *O/B connector, if needed.
What is RC and RH on ecobee?
With dual-transformer systems you’ll have two R wires—one from the cooling transformer (Rc) and one from the heating transformer (Rh). Learn how to install an ecobee thermostat in a dual-transformer system. Rc. If you don’t have an Rh wire, Rc serves as both the cooling and heating power wire.
What color is the RC wire on a thermostat?
Red Marking Wire Color Code Description Rc Red Power from cooling, 24 Vac transformer Rh Red Power from heat, 24 Vac transformer C Black/Blue Common of 24 Vac transformer W White Primary heat cell relay.
What does Rh wire do?
What is the Rh wire on the Nest thermostat? The Rh wire is the power input to the heating system of your air conditioning. If the connection is not established, your air conditioning will stop working.
What is a jumper on a thermostat?
A thermostat jumper wire is a short piece of wire connecting two terminals on the thermostat base. If you have a jumper wire on your old thermostat, discard it and input only the wires from the wall into the Sensi app when prompted during installation.
What is a RC jumper?
The RC Jumper is a tool available to Marcus Holloway. It is free from the 3D Printer, and can be upgraded for even more flexibility during infiltrations. To use it, simply press left on your D-pad, once you’re in a safe hiding place, the RC Jumper becomes controllable.
What happens if you wire a thermostat wrong?
Potential consequences of improper installation could include: Electric shock. Blowing a circuit breaker. Damaging the thermostat unit, the electrical system or even the AC/furnace unit itself.
What is a metal jumper?
Jumper wires are simply wires that have connector pins at each end, allowing them to be used to connect two points to each other without soldering. In fact, it doesn’t get much more basic than jumper wires.
